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KSEA LETTERS
Journal of the Korean-American Scientists and Engineers Association
april 2012
Vol. 40 No. 3 (Serial No. 217)
WWW.KSEA.ORG
MOU WITH ADVANCED TECHNOLOGY CENTER
ASSOCIATION (ATCA) &
ADVISORY COMMITTEE MEETING FOR IBS
KSTLC 2012 IN CHICAGO
MARCH 16-18, 2012

Korea-US Science Cooperation Center
Established as a non-profit in 1997 for fostering science & technology cooperation
between the U.S. and Korea through a variety of programs
S&T Program
Supporting S&T meetings
KUSCO scholarship for Science-majored graduate students
KUSCO-NRF-NSF Summer Institute Program
National Math and Science Competition
WEST Program
What is WEST program?
The WEST program is an exchange program created between the governments of the U.S.
and Republic of Korea. The program will allow qualified university students from Korea to
enter the United States for a period up to 18 months as Exchange Visitors on the J-1 visa.
Parties Names and type Major responsibilities
Host The US organizations Provide work experience
Sponsor KUSCO Visa, Insurance, and administration
Participants University students from Korea Travel, housing and living expense
Benefit Comparison between WEST and other J-1 program
Items WEST Program Generic J-1 program
Visa KUSCO applies Host applies through sponsors
Program KUSCO provides ESL and placement works
Host is responsible for the training
program
Cost
KUSCO and Participants pay for travel, visa Host may be responsible for the travel and
and ESL. No cost to the host.
visa application.
The Current Participating US host institutions
For further information as to WEST program at west@kusco.org
1952 Gallows Road. Suite 330 Vienna Virginia U.S.A. | (703) 893-9772 | www.kusco.org

TABLE OF CONTENTS
Editorial Note 3
Message from the 40 th President 4
President of KSEA Visits the NIH Pioneer at Harvard 5
Featured Articles
Nano-Bio Interfacing: Leveraging Advances in Semiconductor Technology for Biological Research 6
Single Molecule Biology: One, Two, Three & Four 8
Technical Articles
Microstructurally Designed Hierarchal Aluminum Metal Matrix Composites 10
Micro Gas Chromatography System For Distributed Environmental Awareness 12
Interconnected Network of the Cell Cycle, Circadian Rhythms, and DNA Damage Response 14
Cooperative Control at Traffic Light Harnessed by Wireless Cars 16
Workshop on Introduction to Institute for Basic Science 18
MOU Signed with Advanced Technology Center Association (ATCA) 19
UKC 2012 Advertisement 20
Highlights of KSTLC 2012
Message from the Conference Co-Chairs & Welcoming Reception 21
Plenary Presentations & Poster Session 22
Sessions and Workshops 23
Awards 25
Post-YGTLC 2012 Comments & Testimonials 26
Testimonials 27
Sponsor News - Ho-am Prize Recipients 29
Events
Local Chapters 30
Affiliated Professional Societies 31
KSEA Organizational Structure 55
KSEA LETTERS Vol. 40 No. 3 April 2012 1

Pilot High School Physics Contest (HSPC)
Open to 9 th to 12 th graders
Exclusively in
NC & North Texas Region
Organizer:
KSEA
Korean-american ScientiStS and engineerS aSSociation
Co-Organizer:

EDITORIAL NOTE FOR KSEA LETTERS: JOURNAL OF THE
KOREAN-AMERICAN SCIENTISTS AND ENGINEERS ASSOCIATION
This April issue features articles from two world-renowned scholars:
Dr. Hongkun Park , Professor of Chemistry and Chemical Biology at Harvard
University, presents a breakthrough in developing nano-bio interfaces
that maximally utilize the advantages offered by silicone nanostructures by
employing nanoscale needles.
Dr. Taekjip Ha, Professor of Physics at University of Illinois, made a discovery
that a protein can store elastic energy through multiple cycles of chemical
energy release that can be released in a single burst.
KSEA LETTERS
Vol. 40 No. 3 (Serial No. 217)
APRIL 2012
Publisher and Editor
Hosin “David” Lee
Editorial Board
John Kim
Philip Kim
Luke Lee
Hongkun Park
Publications Directors
Byungkyu “Brian” Park
Hyunggun Kim
Jaehoon Yu
Staff Editor
Euna Yoon
Staff Designer
Yoon Hee Chang
Publication Date
April 2012
Published by the Korean-American Scientists
and Engineers Association. All rights
reserved. No part of this publication may be
reproduced, in any form or any means, without
the prior written permission of KSEA.
KSEA assumes no responsibility for statements
and opinions expressed in this publication.
Four distinguished and rising scholars were selected to contribute their frontier research
projects.
Dr. Yongho Sohn, Professor of Materials Science and Engineering at University
of Central Florida, performed extensive microscopic and spectroscopic
analyses to characterize microstructural features of hierarchal composites.
Dr. Hanseup Kim, USTAR Assistant Professor of Electrical and Computer
Engineering at University of Utah and the 2012 recipient of NSF Career
Award, presents his futuristic research on developing micro gas chromatography
system as a ‘wearable’ VOC measurement tool.
Dr. Christian Hong, Assistant Professor of Molecular and Cellular Physiology
at University of Cincinnati and a winner of $3.6 Million DARPA grant,
investigates connections between circadian rhythms, cell cycle, and DNA
damage response as interconnected networks.
Dr. Byungkyu “Brian” Park, Associate Professor of Civil and Environmental
Engineering at University of Virginia, presents a “school of fish” solution to
the traffic congestion by developing a cooperative control algorithm based
on wireless communications among vehicles and infrastructure.
This issue also covers:
▶ Highlights of the 1 st Korean Student Technical Leadership Conference (KSTLC) in
Chicago on March 16-18, where over 100 Korean students studying in America attended:
technical presentations, posters, Dale Carnegie training, presentation skill
workshop, career development workshop, poster competition, and candid testimonials
from participants.
▶ MOU ceremony with Advanced Technology Center Association (ATCA) at Silicon
Valley on March 5 th to establish a cooperative relationship to exchange research ideas
in cutting-edge industrial technologies.
▶ Advisory committee meeting and workshop for Institution of Basic Science (IBS)
and Ministry of Education, Science and Technology (MEST) in Boston on Feb 9 th to
help them recruit team leaders and young scholars (Vice Minister Chang-Kyung Kim
of MEST and top officials from IBS sought inputs from the advisory committee of
senior and distinguished KSEA members in establishing IBS as a world premier basic
science research institute)
▶ Pictures of events organized by local chapters and affiliated professional societies
KSEA LETTERS Vol. 40 No. 3 April 2012 3

MESSAGE FROM THE 40 TH PRESIDENT
Message from the Father of TLC (YG and KS)
40th KSEA President,
Hosin “David” Lee
It is 2:00 a.m. Tuesday on April 10 in Iowa City, after finishing grading the exams, I am back to
work on what I like the most, the KSEA business. I am glad to report that we have successfully organized
the first KSTLC in Chicago for the 1 st Generation Korean students in March. After having
delivered the first YGTLC for the 2 nd Generation Korean-Americans 8 years ago, it was about time
to deliver the second child. I have a feeling that the second child will grow even bigger than the
first child because it was born twice as large as the first one. I would like to recognize the dedicated
contribution from Dr. Byoung-Do Kim, YG director 1, Dr. Benjamin Lee, general director and Mr.
Israel Jung, YG director 2, in guiding 25 organizers including three outstanding co-chairs of Kathy
Lee, Rachel Park and Sarah Rhee. Who said the second child is more precious than the first one?
I would like to congratulate all students from 4 th to 11 th grades who participated at the 2012 National
Math & Science Competition (NMSC) on April 21, co-organized by KUSCO. First, I would like to
thank Dr. Kookjoon Ahn, Vice President 1, Dr. Yongho Sohn, executive director, Dr. Wookeun Shin,
chair of the chapter presidents committee, chapter presidents and members of participating local
chapters, and many more volunteers for the successful planning and execution of the NMSC. This year’s problem sets were prepared
by the math and science educators from University of Iowa: Dr. Soonhye Park, Chair, and Dr. Kyong Mi Choi, Co-Chair,
and members of the NMSC Committee. We added a new high school physics contest, led by Dr. Jae Yu, Publication Director 3,
in collaboration with the Association of Korean Physicists in America (AKPA), one of our 23 affiliated professional societies.
This year, all national award recipients and their parents are invited to attend the NMSC award ceremony at 11:00 a.m. on May
12, Saturday, followed by a luncheon with a keynote speech from Dr. Jim Gates, Jr., member of the President Obama’s Council
of Advisors in Science and Technology (PCAST) and advisor of KSEA, at Marriott Hotel at Tyson Corner in Washington. We
invited the Ambassador Young-jin Choi of Korea and an administrator from University of Pennsylvania to give welcoming remarks.
Yes, with your active participation, we broke the record of the participation at the NMSC.
We organized the workshop to introduce the Institute of Basic Science (IBS) to young scientists and the advisory committee
meeting for Dr. Chang Kyung Kim, Vice Minister of Education, Science and Technology of Korea, and top officials of IBS in Boston
in February. In March, we signed the ninth MOU with Advanced Technology Center Association (ATCA) and have already
started working with ATCA by connecting our members to their company members for research collaboration. In April, our
organization was selected to give a presentation at the heritage community liaison council meeting as the “Spotlight” organization
to other council member organizations and top officials of Office of Director of National Intelligence (ODNI). I am proud
to say that KSEA was recognized as a role model heritage organization in America.
Since signing our first MOU with Korea Evaluation Institute of Industrial Technology (KEIT) on July 1, 2011, we continued to
work with them throughout the year starting with training of their employees in December, participation and sponsorship of
YGTLC and KSTLC, participation of our members in the research proposals to KEIT, and a contract to develop research need
statements. It is a win-win situation for both KSEA and KEIT, and, like Rick said in Casablanca, Keit, I think this is only the
beginning of a beautiful relationship.
I cannot end my remarks without giving you an update on the membership status and budget situation. Yes, we set a new record
of over 4,100 members, Yeah! And the all-time high revenue of $2.4 Million, including an unprecedented amount of donation of
$37,680 from our own members and still growing! Do the math! We invested nearly $600 per member this year! Ask the question
to your American colleagues! Which organization in America invests in its members more than KSEA?
KSEA is a drawing board for you and I hope your participation at the UKC, YGTLC, KSTLC, NMSC as well as other KSEA
events is a very large dot that you can connect looking back later. As Steve Jobs said, you cannot connect the dots looking forward
but you should create as many diverse dots now. KSEA exists to help its members succeed in the main stream of America.
To help you find what you look for, KSEA will leave a light on for you. It is 3:40 a.m. in Iowa City and I have just received this
email from a member, “Thanks for your great work for KSEA. I was impressed with your talk. Of course, I am impressed with
your passion and leadership. I heard KSEA’s great growth under your leadership.”
Yeah! This will keep me going and going …
4
KSEA LETTERS Vol. 40 No. 3 April 2012

PRESIDENT OF KSEA VISITS THE NIH PIONEER AT HARVARD
PRESIDENT OF KSEA VISITS THE NIH PIONEER AT HARVARD
[Kyungjae Myung, KSEA Headquarter Operation Director]
Senior Investigator
National Human Genome Research Institute, NIH
On a beautiful afternoon of February 9 th , after passing through historical brick
buildings, I followed President Hosin Lee to the Cambridge Street where scientific
department buildings with more modern styles are located. I read two previous
interviews with Prof. Philip Kim of Columbia and Prof. John Kim of UCLA and I
was excited to be a writer for this third article for Prof. Hongkun Park whom I call
“Hyung”. He is not only a world-renowned scholar but also my staunch alumnus
of elementary, middle school and college.
The first impression I have received walking into Dr. Park’s office was “clean, neat,
and organized.” President Lee quickly asked the first question, the same one that he
asked to two previous interviewees, what his secrets are to achieve such a great success in his career. Dr. Park was very modest by
saying “I do not believe I am successful yet.” However, thanks to our curious President, who kept insisting that it would help other
KSEA members especially those in early career, Dr. Park told us that one major reason for his success was due to the people with
whom he encountered; his mentors, colleagues, and students/fellows worked in his laboratory.
President Lee asked his second question why he chose Stanford for his graduate study. Dr. Park told us, without hesitation, “because
I was truly excited about the project that the professor at Stanford University, who became my Ph.D. advisor later, was working
on.” He also added that he chooses students/fellows in his laboratory only if they express “the true enthusiasm”. (tip to become
his student).
He started as assistant professor at Harvard like everyone else but became a full professor
with tenure in just four years (Note: Harvard university grants tenure to a full professor
only). In President Lee’ opinion, he is the first (maybe second) Korean-American
who received tenure at Harvard. When Dr. Park received tenure, he also received a new
startup fund from Harvard so that he could use it for starting a new line of research
with high-risk and high-impact. Harvard even built a new building section where his 30
students and post-docs are now working with the state-of-art research equipment. So,
he initiated a new line of research in the field of nano-bio interfacing and neuroscience,
where he believed many important scientific questions would still remain. His high-risk
effort to a new direction became very fruitful with many papers published in the most
prestigious journals like Nature, Cell, and Nature Nanotechnology. He also won the NIH’s most prestigious award called “NIH
Pioneer Award.”
Dr. Park then took us out for the most memorable lunch, particularly for President Lee
who took the picture of us, at the Harvard Faculty Club. The atmosphere of the restaurant
was the authentic Ivy League prestige. On the way to his laboratory after lunch, Dr. Park
took us to the statue of the first benefactor of Harvard University, John Harvard. Thanks
to the belief that the person who touches the left shoe of the statue becomes lucky to get
admission to Harvard, the left toe of the statue was very shiny. Our curious President, of
course, touched the shoe with a hope for his son will get an admission to Harvard for his
graduate study.
Dr. Park then gave us a tour of his laboratory. We were impressed with so many expensive
looking research instruments and observed many students and post-doctoral fellows who
were working hard. President Lee asked Dr. Park to pose in front of his instrument, but
Dr. Park humbly declined it. Our tenacious President tried and started to chase Dr. Park
who was running away from him. It was a very funny scene I would never forget. On the
way back to the hotel, President Lee kept saying that he felt so proud to witness an increasing
number of successful young (to him) Korean-American scientists in the US.
KSEA LETTERS Vol. 40 No. 3 April 2012 5

FEATURED ARTICLES
NANO-BIO INTERFACING: LEVERAGING ADVANCES IN SEMICONDUCTOR TECHNOLOGY FOR
BIOLOGICAL RESEARCH
[Hongkun Park]
Professor, Chemistry and Chemical Biology and Physics
Harvard University
Silicon integrated circuits represent an enormously successful paradigm for electronics – they are mass-produced at low cost in silicon
foundries, and yet a chip with a footprint less than a square inch, is a highly integrated superstructure that contains hundreds of millions
of transistors and can process data at gigahertz rates. Moreover, they contain top-down fabricated nanostructures whose sizes are
comparable to important biological molecules and cells. As such, silicon nanostructures and integrated circuits have the potential to
become a unique tool for interrogating living cells and organisms when a proper interface is developed.
Over the past five years, a part of my group at Harvard has been working toward developing nano-bio interfaces that maximally utilize
the advantages offered by these silicon nanostructures. 1-4 Our efforts have been centered on one particular structure: vertical silicon
nanowire (SiNW) arrays. These nanoscale needles, which can be fabricated en masse using standard silicon processing technology,
penetrate through the cellular membrane without compromising cell viability or function, thus providing direct intracellular access to
a living cell. This unique capability, which is difficult to realize by any other means, provides an exciting opportunity for many branches
of biological research. In my laboratory, we have been employing these nanoscale needles (1) to investigate the intracellular circuits
that are responsible for the functions of immune cells, cancer cells, and stem cells by delivering various biological effectors 1-3 and (2) to
monitor and control activities of brain cells in complex neuronal networks and tissues. 4
SiNW nanoinjection for cell circuit perturbation: Efficient delivery of active biological effectors (DNAs, RNAs, peptides, proteins, or
small molecules) into living cells is central to biological research and pharmaceutical screening. For instance, achieving a mechanistic
understanding of intracellular molecular circuits requires systematic perturbation of circuit components and analysis of the resulting
changes in cellular behavior. The success of this strategy depends critically on delivering various biological perturbants into living cells
without compromising their viability or function.
Because many biological effectors do not spontaneously cross the plasma membrane, a host of methods have been developed to deliver
them into cells. Unfortunately, in a variety of primary cells, especially in resting immune cells, many of these techniques have proven
ineffective, inducing non-specific inflammation or cell death. These limitations have severely restricted the use of perturbations in
uncovering the ways in which these cells respond to extra- and intracellular signals, and have been a major obstacle to elucidating the
molecular biology that underlies many hematological cancers. Clearly,
the resistance of these cells to conventional means necessitates the development
of new approaches.
6
Over the past few years, we have developed a new SiNW-based nanoinjection
method that can serve as a minimally invasive and efficient
method for delivering a variety of biomolecules into hard-to-transfect
cells. 1-3 Specifically, we showed that the surface-coated SiNWs could efficiently
administer active biomolecules directly into the cytoplasm of
virtually any type of cell without impacting its viability or function (Figure
1). 1 We then used the method to discover new components of the
Toll-Like Receptor (TLR) network in mouse dendritic cells. 2 We also
applied the method to investigate patient heterogeneity in chronic lymphocytic
leukemia (CLL), the most common adult leukemia in North
America. 3 By perturbing CLL cells using SiNW-mediated siRNA delivery,
we identified three patient response groups, unclassifiable by known
criteria, that required distinctly different clinical treatment schedules.
These examples show that SiNWs can contribute greatly in cell circuit
studies of otherwise hard-to-transfect cells: starting from the cells taken
from a single blood draw, multiple different knockdowns could be used
to simultaneously probe the importance of multiple potential pathways,
enabling a detailed understanding of the intracellular circuitry critical
for cell function and also the development of patient-specific combinatorial
therapies.
Figure 1. SiNW nanoinjection. Upper Image: a confocal image
of a mouse dendritic cell on top of vertical SiNWs. Magenta: cell
membrane, blue: cell nucleus, whilte: SiNW. Lower diagram: a
model of the Polo-like-kinase-dependent pathway of the antiviral
response in mouse dendritic cells.
KSEA LETTERS Vol. 40 No. 3 April 2012

FEATURED ARTICLES
Vertical nanowire electrode array for brain-machine interfacing: Neuronal networks – collections of neurons interconnected by
synaptic junctions – form the physical basis of the central and peripheral nervous systems in biological organisms. The particular
function of a neuronal network is determined by the intrinsic properties of its constituent neurons, the spatial connectivity among
them, and the adaptive strengthening/weakening of those connections. Yet, developing a clear understanding of how these properties
encode network function remains one of the major challenges of modern science.
While recent advances in electron and optical microscopy have enabled the physical wiring diagram (the “structural connectome”) to
be determined for small volumes of neural tissue, this structural information does not necessarily provide insight into the network’s
function. Traditionally, functional behavior has been studied by optical imaging through the use of voltage and calcium sensitive dyes
or electrophysiological measurements performed by extracellular electrode arrays. While these methods have significantly expanded
our understanding of neuronal networks, they are fraught with significant shortcomings – for example, optical imaging provides only
a time-averaged approximation of neuronal activity, while extracellular recording fails to provide clear signal-to-cell registry. Generating
a high-resolution “functional connectome” requires the development of new experimental tools.
Recently, we have developed a highly scalable intracellular electrode platform that
is specifically designed to help address this issue by leveraging the same nanofabrication
technology that enables mass-production of integrated silicon electronic
circuits. 4 Our vertical nanowire electrode arrays (VNEAs) can intracellularly record
and stimulate neuronal activity in dissociated cultures of rat cortical neurons and
can also be used to map multiple individual synaptic connections (Figure 2). Moreover
the VNEA platform can be readily coupled with conventional patch measurements,
fluorescence microscopy, and optogenetic techniques, allowing truly multiplexed
interrogation of a neuronal circuit. Although the prototype demonstrated
to date has only 16 stimulation/recording sites, higher numbers and densities can
easily be achieved using standard silicon nanofabrication processes. The integration
of complementary metal-oxide-semiconductor circuitry with a VNEA would
further allow on-chip digitization, signal multiplexing, compression, and telemetry.
The scalability and high fidelity of this platform, combined with its compatibility
with silicon nanofabrication techniques, should enable detailed mapping of synaptic
connectivity in complex neuronal networks, thereby providing a transformative
new tool for functional connectomics. The same platform will also allow the
efficient high-throughput screening of candidate drug treatments for neurological
disorders.
Outlook: Above, I have provided a brief summary of the nano-bio research activities
in my group. I should stress that our efforts represent just a small part of a much
bigger landscape: many outstanding research groups are performing beautiful research
in a closely related area, i.e., in applying nanoscience and technology to solve
important biological problems. Over the past two decades, “nanoscientists” have
amassed an impressive array of materials and tools that, when properly harnessed,
should provide new ways of investigating biological problems. For this nascent field
to flourish, however, more and better collaboration between nanoscientists and biologists
will be essential. We should identify important problems and new opportunities
in concert, and develop tools and perspectives that are designed to address
them. I am confident that we can and, in time, we will.
Figure 2. VNEA for neuronal recording and
excitation. Upper left: an array of SiNWs capped
by gold. The scale bar is 2 μm. Upper right: a rat
cortical neuron on top of a recording/excitation
pad. Lower graph: VNEA devices can be
used to excite and record neuronal action potentials
intracellularly, providing a highly scalable
electrophysiology platform for neuroscience.
References:
1. A. K. Shalek et al. Proc. Natl. Acad. Sci. USA 107, 1870-1875 (2010).
2. N. Chevrier et al. Cell 147, 853-867 (2011).
3. A. K. Shalek et al. submitted (2012).
4. J. T. Robinson et al. Nature Nanotech. 7, 180-184 (2012).
KSEA LETTERS Vol. 40 No. 3 April 2012 7

FEATURED ARTICLES
SINGLE MOLECULE BIOLOGY: ONE, TWO, THREE & FOUR
[Taekjip Ha]
Professor, Physics
Center for the Physics of Living Cells, University of Illinois at Urbana-Champaign, Howard Hughes Medical Institute
I call myself an accidental biophysicist. My Physics Ph.D work began in semiconductor physics and through a series of accidents I ended
up developing methods to detect single fluorescence molecules. It turned out that the single molecule fluorescence methods could be
applied to many biological systems and gradually my research topics shifted to biological questions, and although I teach physics in a
physics department, all of the questions that we are addressing are biological in nature.
Why would a physicist want to study biology? First, minimal functional units in biology are molecules and they can range between 1
and 100 nm, the scale of current and future electronics. Second, biomolecules have been optimized through billions of years of evolution
and often biological sensor reach the physical limits of sensitivity. A deep understanding of biological systems may ultimately lead
to development of man-made nanomachines through reverse engineering. But is the population notion that biological molecules, for
example proteins are nanomachines justified? For example, do the nanomachine have what man-made machines have such as engines
and springs?
The answer is a definitive yes for molecular motors that convert chemical energy stored in ATP or another high energy molecules into
mechanical energy. A great example is myosin V which takes a 37 nm step along its track every time it consumes an ATP molecule as
the fuel (Figure 1a). There was, however, a controversy as to whether myosin V walks on the track like a person (two feet alternating in
position) or it crawls like a baby (one foot stays ahead of the other). Single molecule imaging and localization down to 1.5 nm precision
led to a definitive proof that myosin V walks (1). This is an example of using detection of single fluorescent molecule to answer fundamental
questions in biology (‘One’ in the title of this article).
We recently made an exciting discovery that a protein can store elastic energy through multiple cycles of chemical energy release and
that this stored energy can be released in a single burst (Gwangrog Lee et al., submitted). In this work, an enzyme that can digest RNA
strand one base at a time even in the presence of basepaired structures was studied using another single molecule method called single
molecule fluorescence resonance energy transfer (FRET). FRET measures the interaction between two dye molecules attached to a
biological molecule and because FRET is a strong function of distance, it can report on even minute distance changes during biological
reactions. In this particular work, we attached the dyes to the RNA so that FRET would increase during RNA unwinding by the enzyme
(Figure 1b). The surprise was that the enzyme unwound RNA in large steps about 4 base pairs even though the motion is powered
by RNA digestion in single base steps, strong suggesting the enzyme/RNA complex can be viewed as a spring. ‘Two’ in the title of this
article refers to FRET and my laboratory has been fortunate to make several interesting discoveries on enzymes that work on DNA and
RNA using the method.
Figure 1. Protein as a nanomachine (a) A nanoengine.
(b) A nano-spring.
8
KSEA LETTERS Vol. 40 No. 3 April 2012

FEATURED ARTICLES
There is yet another powerful single molecule method called optical tweezers.
Optical tweezers can be viewed as chopsticks made of light and can be used
to apply and measure very small forces down to sub-pico Newtons (< 10 -12
Newton) and measure small movements down to a few angstroms. We combined
optical tweezers and single molecule FRET to measure conformational
changes of a single molecule via FRET as a function of applied force (2). This
led to a number of interesting findings, for example, how a protein that is fully
wrapped by a DNA strand can rapidly migrate on the DNA (3)(Figure 2).
I call this effort “Two+One” because we are combining FRET with an extra
dimension of applied force.
Thus far, most of single molecule biophysics experiments have been performed
on one molecule in isolation largely due to technical difficulties but
these molecules do not function in isolation in the cell. Therefore, in order to
Figure 2. FRET and force. Optical tweezers can apply
force to the DNA and FRET can be used to measure how
the SSB protein’s motion is affected by DNA unraveling.
better mimic the cellular conditions, we need to study biomolecular complexes with multiple components. We and others have made a
technical push in this direction, for example pushing the single molecule fluorescence measurements to three and four colors (“Three
and Four” in the title comes from this)(4), and combining single molecule fluorescence with ultrahigh resolution optical tweezers (5).
Our dream experiment is to measure a complex cellular process such as copying of DNA using multi-dimensional single molecule
techniques. For example, a three-axis optical tweezers can measure the progress of DNA copying with a single base pair resolution
while at the same time, proteins labeled with different dyes can be visualized to report on which proteins participate in which step and
how they change their structures and relative organizations (Figure 3).
Figure 3. Multi-dimensional single molecule measurements
of DNA copying process.
In closing, I would like to emphasize the need to make connection between in vitro biophysical studies and in vivo functions. Systems
biology is another contemporary discipline that rely on physical tools and mathematical modeling to understand the underpinnings
of biological phenomena. There is now a growing connection between the two disciplines, spurred by new developments in cellular
imaging and absolute quantification at the single molecule level, with the potential for facilitating a new quantitative understanding of
biological processes. The interface between these two fields holds a great promise of fertile interaction and new discovery.
REFERENCES
1. A. Yildiz et al., Science 300, 2061 (2003).
2. S. Hohng et al., Science 318, 279 (Oct 12, 2007).
3. R. Zhou et al., Cell 146, 222 (Jul 22, 2011).
4. J. Lee et al., Angew Chem Int Ed Engl 49, 9922 (Nov 23, 2010).
5. M. J. Comstock, T. Ha, Y. R. Chemla, Nature Methods 8, 335 (2011).
KSEA LETTERS Vol. 40 No. 3 April 2012 9

TECHNICAL ARTICLES
MICROSTRUCTURALLY DESIGNED HIERARCHAL ALUMINUM METAL MATRIX COMPOSITES
[Yongho Sohn]
Professor, Materials Science and Engineering
University of Central Florida, Orlando
INTRODUCTION
Nanostructured Al-alloy based MMCs have gained considerable interest due to their excellent properties (i.e., high strength, low
density, good corrosion resistance), and their technical and economical ease of manufacturing. Recently, a hierarchal MMC consisting
of a nanocrystalline Al phase (NC-Al), boron carbide (B4C) reinforcement particles, and a coarse-grain Al phase (CG-Al) has
been successfully fabricated and reported to exhibit extremely high compressive yield strength ( > 1 GPa) and tailorable ductility
(~ 15%) [1,2]. In particular, high strain-rate dependent materials have found their way into aerospace, automotive, biomedical, and
defense application. These properties are achieved through control of the microstructure that is dependent on parameters of materials
processing and manufacturing. The hierarchical Al-MMCs exhibit good thermal stability and microstructural characteristics
that deflect or blunt or bridge crack propagation. The microstructure and properties can be further customized through the use of
friction stir processing [3] which offers a variety of possibilities for joining components of dissimilar geometry, modified and graded
microstructure and composition.
MATERIALS PROCESSING AND MANUFACTURING
The commercial gas-atomized AA5083 Al powder has an average particle size of less than 45 μm with a grain size ranging from 0.2
to 2 μm. The B4C powder has a starting particle size between 1 to 7 μm. The 5083 Al powder is combined with B4C powder and cryomilled
for up to 24 hours. The powders are ball-milled in the presence of liquid N2 to increase friability, prevent oxidation and mitigate
dynamic recrystallization. Commercially available stearic acid is utilized as a process-control agent during milling to prevent excessive
agglomeration of the powders and improve yield. Cryomilling is a key step that produces the Al grain size down to 20-30 nm
[4,5], disperses the B4C into the Al matrix and creates the NC-Al/B4C bond. Other strengthening mechanisms are generated during
this process including dislocation entanglement, dispersoids strengthening and complex interface development. After cryomilling,
additional AA5083 powder (CG-Al) is blended with the cryomilled mixture, which in turn creates the hierarchal MMC powders.
The powder samples are degassed
through a rotary dynamic vacuum
degassing system. The degassed
powders are then consolidated into
billets with established powder metallurgy
techniques such as vacuum
hot pressing, cold isostatic pressing,
or hot isostatic pressing. Secondary
processing is achieved through
conventional wrought processing
techniques such as extrusion, forging,
and/or rolling. Figure 1 illustrates
the complete manufacturing
processing steps of the hierarchal Al
Figure 1. Manufacturing sequence of hierarchal Al metal matrix composites
MMCs examined in this study.
NOVEL MICROSTRUCTURAL FEATURES OF HIERARCHAL COMPOSITES
Extensive microstructural and spectroscopic analyses were carried out as a function of processing parameters. The properties of
hierarchal Al MMCs were influenced by multiple microstructural features including: (1) volume (or weight) fraction of each constituent,
NC-Al, CG-Al and B4C; (2) grain size and distribution of the NC- and CG-Al; (3) size and distribution of the B4C particle
reinforcement; (4) size and distribution of hierarchal microstructural domains, e.g., CG-Al and B4C/ NC-Al agglomerates; (5)
dislocation densities the in NC- and CG-Al; (6) composition, distribution and structure of nitrogen incorporated during cryomilling
either in solution or as a dispersoid reinforcement; (7) characteristics of grain boundaries and interfaces (e.g., NC-Al and B4C,
NC-Al and CG-Al, CG-Al and B4C); (8) other impurity-associated strengthening by solution or dispersion reinforcements.
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TECHNICAL ARTICLES
Characteristic microstructure of consolidated hierarchical
Al MMCs is presented in Figure 2. The light grey region
is the CG AA5083 Al, and the darker grey regions
are the nano-agglomerate that consists of cryolmilled
NC-Al and B4C. The dark “spots” within the nano-agglomerate
are B4C particulates. Grain size within NC-
Al region has been examined by hollow-cone dark field
(HCDF) TEM imaging for statistically confident analyses,
and ranges from 30-50 nm after primary consolidation
as presented in Figure 2 [6]. The primary reinforcement,
B4C is evenly dispersed throughout the NC-Al
agglomerate and typically has a narrow distribution of
size. The typical grain size of the CG-Al is 0.2 to 2 μm.
The CG-Al is added to promote ductility and interact
with cracks propagating through the composite. Cracks
Figure 2. Novel microstructural features of hierarchal Al-MMCs
propagate easily through the brittle NC-Al/B4C region,
but are deflected or blunted or bridged upon reaching the CG as seen in Figure 2 [6]. This behavior gives the composite toughness.
Nitrogen is absorbed by the NC-Al during cryomilling, and manifest as AlN crystals and amorphous, N-rich dispersoids that
are usually found at the NC-Al grain boundaries [5-7]. Nitrogen concentration was found to vary linearly with milling time of
up to 24 hours [8]. Other dispersoids that have been observed through microstructural interrogation are oxides and carbides
[6]. Fe- and Mn-rich dispersoids are also found in both the NC-Al and CG-Al regions. These dispersoids can help contribute
to the excellent thermal stability exhibited by this composite [7]. It is noted, however, that under both thermal and mechanical
deformation, the NC-Al grains can grow significantly. Yao et al. found that the average NC-Al grain size after cryomilling was
about 20 nm, and after secondary processing (high temperature and stress for an extended time), the NC-Al grain size increased
to over 100 nm [8].
As a result of cryomilling the NC-Al grains retain a high strain energy in the form of dislocations. After consolidation, some of
these dislocations are annihilated while deformation during secondary processing can introduce new dislocations into the CG-
Al. Yao et. al estimated, based on HCDF technique, the dislocation density of the NC-Al and CG-Al after secondary processing
to be about 1.9·1016 m-2 and 1.2·1015 m-2 respectively [9].
ACKNOWLEDGEMENT
Research was sponsored by U.S. Army Research Laboratory and was accomplished under Cooperative Agreement
W911NF-08-2-0026. The views, opinions, and conclusions made in this document are those of the authors and should not be
interpreted as representing the official policies, either expressed or implied, of Army Research Laboratory or the U.S. Government.
The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any
copyright notation herein.
REFERENCES
1. J. Ye, B.Q. Han, Z. Lee, B. Ahn, S.R. Nutt, J.M. Schoenung, Scr. Mater., 53 (2005) 481.
2. H. Zhang, J. Ye, S.P. Joshi, J.M. Schoenung, E.S.C. Chin, K.T. Ramesh, Scr. Mater., 59 (2008), 1139.
3. Y.H. Sohn, T. Patterson, C. Hofmeister, C. Kammerer, W. Mohr, M. van den Bergh, M. Shaeffer, K. Cho, J. Metals,
64 (2012) 234.
4. D.B. Witkin, E.J. Lavernia, Prog. Mater. Sci., 51 (2006) 1.
5. E.J. Lavernia, B.Q. Han, J.M. Schoenung, Mater. Sci. Eng. A, 493 (2008) 207.
6. B. Yao, C. Hofmeister, T. Patterson, Y. H. Sohn, M. van den Bergh, T. Delehanty, K. Cho, Composites A, 41 (2010) 933.
7. C. Hofmeister, B. Yao, Y. H. Sohn, T. Delahanty, M. van den Bergh, K. Cho, J. Mater. Sci., 45 (2010) 4871.
8. B. Yao, B. Simkin, B. Majumdar, C. Smith, M. van den Bergh, K. Cho, Y.H. Sohn, Mater. Sci. Eng. A, 536 (2012) 103.
9. B. Yao, H. Heinrich, K. Cho, Y.H. Sohn, Micron, 42 (2011) 29.
KSEA LETTERS Vol. 40 No. 3 April 2012 11

TECHNICAL ARTICLES
MICRO GAS CHROMATOGRAPHY SYSTEM FOR DISTRIBUTED ENVIRONMENTAL AWARENESS
[Hanseup Kim, KSEA Membership Director]
USTAR Assistant Professor, Electrical and Computer Engineering
University of Utah
INTRODUCTION
The World Health Organization (WHO) states that 2.4 million people die each year worldwide from causes directly attributable to
air pollution (1). In US the fatalities from air pollution, totaling over 70,000 lives in 2002, are twice the number of automobile fatalities
and are equal to deaths from breast cancer and prostate cancer combined (2). Hundreds of scientific studies conducted worldwide
have provided evidences that polluted air has alarming adverse effects on health (3). Clearly, the exposure to air pollution needs
to be dramatically reduced or at least monitored for individuals. While the air pollutants include various chemical compounds, such
as ozone, nitrogen oxides, and sulfur dioxide, Volatile Organic Compounds (VOCs) cover the largest number of >100 pollutants
and are the most common pollutants exposed to humans who spend a significant amount of time indoors. Another report from
EPA states that the indoor air pollution caused by VOCs is ten times higher than outdoor regardless of the building location in rural
or highly industrial areas (4). VOCs are also found to have strong correlation with allergies and asthmas, and each individual has
different levels of responses to specific VOCs (5, 6). Thus, the development of a personal ‘wearable’ warning system against a wide
range of VOCs is much needed to prevent significant harm to public health from nearly inevitable exposure. Currently there are no
viable options for such needs.
MICRO GAS CHROMATOGRAPHY SYSTEM
A micro gas chromatography system (μGC) can be a best option as a ‘wearable’ VOC measurement tool. Compared to commercial
gas sensors that have narrowly-limited detection targets (e.g. carbon monoxide sensor), a gas chromatography (GC) system could
provide much higher detection capacity of >10’s species and seems a more feasible option for miniaturization than mass spectrometry
(MS), because of its ‘less’ requirements for supporting equipments (no vacuum pumps or carrier gases). Indeed a GC is the most
widely used tool in analytical chemistry. Currently MS has proven to be more difficult to miniaturize due to the vacuum pumping
requirements as well as the need to purifying samples before analysis. The state-of-the-art “portable” MS still weighs over 11kg,
consumes >42W, and has the size of a backpack. Note that the miniature GCs also hold significant advantages of high-speed & highresolution
detection, tiny volume, reduced power, as well as the possible ‘wearable’ portability.
Operation Principle: A micro gas chromatograph enables the detection of complex mixtures of ~100 airborne compounds by first
spatially separating and then detecting them along fluidic migration. To do so, it incorporates additional components than the standalone
gas sensor, including a pre-concentrator, a separation column and a fluidic pump (Figure 1). The pre-concentrator collects
targets into high concentration for better sensitivity; the column provides a race track where target species are separated in space
and time to enhance selectivity at the detection sensor; and the micropump forces the target samples to flow at the optimal speed
for efficient separation as well as the rapid detection. Specifically, the spatial separation among compounds is achieved in the column
where special coating inside, called as a stationary phase, adsorbs and releases the different target molecule groups at different
speeds. Resultantly each group of gas molecules becomes apart as they pass through the column. Thus, each group passes by a sensor
at different times and produces a train of peak signals at a micro sensor for detection.
Figure 1. The operation principle of the gas chromatography system: Spatial separation ahead of detection
reduces the burdens on the sensor’s selectivity and sensitivity.
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TECHNICAL ARTICLES
HYBRID MICRO GC
The first micropump-driven micro gas chromatography
system has been demonstrated,
with a total device volume of 0.5 cc (Figure
2). The μGC samples separates and detects airborne
11-mixture VOCs at high-speed (

TECHNICAL ARTICLES
INTERCONNECTED NETWORK OF THE CELL CYCLE, CIRCADIAN RHYTHMS,
AND DNA DAMAGE RESPONSE
[Christian Hong]
Assistant Professor, Molecular and Cellular Physiology
University of Cincinnati College of Medicine
Fundamental cellular processes that maintain most organisms’ health and survival include cell cycle, DNA damage response, and
circadian rhythms. Cell cycle is equipped with multiple checkpoints for controlled growth, DNA replication, and divisions. DNA
damage response (DDR) mechanisms control cell fate by either repairing single or double strand breaks, or triggering apoptosis for
programmed cell death when the damage is fatal. Last, but not least, is circadian rhythm that keeps track of time of a day, and plays a
central role in most organisms for setting the sleep/wake cycle, feeding rhythms, and other daily activities. These distinct molecular
mechanisms communicate with each other and create a complex bio-molecular network to optimize conditions for cells to grow and
adapt to the surrounding environment. Perturbations and dysfunctional cellular responses in this network may lead to diseases such
as cancer, obesity, and sleep disorders among many others.
Figure 1. Simple schematic of
time-delayed negative feedback
loop of Neurospora circadian
rhythms
The mechanistic blueprints of circadian rhythms are similar from Neurospora crassa to Mus musculus
[1]. In Neurospora, the heterodimeric transcription factor, WCC that contains a conserved PAS
domain, activates a core clock component designated frq. The FRQ protein translocates into the
nucleus and inhibits its own transcription factor, WCC. In brief, this creates a time-delayed negative
feedback loop, which is at the heart of circadian rhythms [1] (Figure 1). While this circuit may be
at the core of the circadian clock system, its operation, however, is much more complex involving
interlocked feedback loops, transcriptional, post-transcriptional, and post-translational regulations
[2].
Cell cycle and circadian rhythms are coupled despite their discrete functions. The circadian gated
cell division cycles are observed in various organisms from cyanobacteria to mammals [3-6]. A
mammalian circadian transcription factor, BMAL1/CLOCK, directly binds the E-box in the Wee1
promoter and activates its transcription. WEE1 is one of the key cell cycle kinase that phosphorylates and inactivates the Mitosis
Promoting Factor (MPF) that facilitates the entry into the mitosis. The abundance and activity of WEE1 have been shown to oscillate
and be transiently elevated during the evening in mouse liver [5]. These, in turn, determine the duration of G2-phase. Cells divide
in late evening when the WEE1 level decreases in order to allow cells to enter into the M-phase. The component of the cell cycle
that is controlled by WEE1 operates in concert with another regulatory system that is
periodically imposed on WEE1 by the circadian clock.
The above seemingly unidirectional communication was recently shown to be conditionally
bidirectional. DNA damage induces responses that arrest the cell cycle, or
lead to programmed cell death, e.g. apoptosis. Ionizing radiation causes DNA doublestrand
breaks that trigger signaling cascades via ATM and CHK2 [7]. In Neurospora
crassa (filamentous fungi) and in mammals, the CHK2 checkpoint kinase physically
interacts with a core clock components, FRQ and PER1 [8, 9], respectively, and represents
an intersection point between cell cycle regulation and the circadian clock.
The CHK2 kinase phosphorylates and promotes premature degradations of FRQ/
PER1, which creates phase shifts in the circadian clock (Figure 2). The implications of
such a phenotype raise the hypothesis that the cell cycle machinery utilizes circadian
rhythms to activate WEE1/SWE1 by prematurely degrading FRQ [10]. This degradation
removes the negative feedback on its transcription factor, WCC, which will then
activate Swe1 and arrest cell cycle progression and provide time for DNA repair. There
are additional candidates that participate in the molecular coupling of the cell cycle
and the circadian clock. The transcript of c-Myc oscillates with a circadian period,
and its transcription is suppressed by a heterodimeric circadian transcription factor,
BMAL1/NAPS2 [11]. The molecular details of this coupling, however, remain unex-
Figure 2. DNA damage activates Chk2, which
phosphorylates one of the core circadian clock
component, PER1 in mammals and FRQ in
Neurospora, resulting in phase shifts of circadian
rhythms
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TECHNICAL ARTICLES
plored. Additional cell cycle genes such as CyclinD1, Gadd45α, and Mdm-2 also produce transcripts whose abundance oscillates, but
details of how they are regulated remain unknown [11]. The rhythmic CyclinD1 transcripts suggest a role of the circadian clock at
the G1 to S transition as well as the G2 to M transition due to the activity of WEE1. Furthermore, the rhythmicity of the Gadd45α
and Mdm-2 transcripts suggests that the circadian clock plays a regulatory role in cellular responses to DNA damage.
In our lab, we investigate connections between circadian rhythms, cell cycle, and DNA damage response as interconnected networks.
Each cellular mechanism is complex with multiple feedback loops. Therefore, we use mathematical modeling to investigate
network dynamics arising from these interlinked cellular processes, and experimentally validate model-driven hypotheses in Neurospora
crassa (Figure 3). Iterative approaches of mathematical modeling and experimental validations maximize synergy dissecting
intertwined molecular mechanisms of the above three processes. Detailed investigation of these interactions will lead to better
understanding of functional roles of circadian rhythms in the cell cycle and DNA damage response.
Figure 3. Interdisciplinary approach to dissect molecular mechanisms of circadian rhythms and other cellular processes
such as cell cycle. Molecular wiring is converted into a set of ordinary differential equations that provide hypotheses and
guide experiments.
References:
[1] Dunlap, J. C. 1999. Molecular bases for circadian clocks. Cell 96:271-290.
[2] Heintzen, C., and Y. Liu. 2007. The Neurospora crassa circadian clock. Adv Genet 58:25-66.
[3] Sweeney, B. M., and J. W. Hastings. 1958. Rhythmic cell division in populations of Gonyaulax polyedra. J Protozool 5:217-224.
[4] Edmunds, L. N., Jr. 1974. Phasing effects of light on cell division in exponentially increasing cultures of Tetrahymena grown at
low temperatures. Exp Cell Res 83:367-379.
[5] Matsuo, T., S. Yamaguchi, S. Mitsui, A. Emi, F. Shimoda, and H. Okamura. 2003. Control mechanism of the circadian clock for
timing of cell division in vivo. Science 302:255-259.
[6] Yang, Q., B. F. Pando, G. Dong, S. S. Golden, and A. van Oudenaarden. 2010. Circadian gating of the cell cycle revealed in single
cyanobacterial cells. Science 327:1522-1526.
[7] Pardo, B., B. Gomez-Gonzalez, and A. Aguilera. 2009. DNA repair in mammalian cells: DNA double-strand break repair: how
to fix a broken relationship. Cell Mol Life Sci 66:1039-1056.
[8] Pregueiro, A. M., Q. Liu, C. L. Baker, J. C. Dunlap, and J. J. Loros. 2006. The Neurospora checkpoint kinase 2: a regulatory link
between the circadian and cell cycles. Science 313:644-649.
[9] Gery, S., N. Komatsu, L. Baldjyan, A. Yu, D. Koo, and H. P. Koeffler. 2006. The circadian gene per1 plays an important role in
cell growth and DNA damage control in human cancer cells. Mol Cell 22:375-382.
[10] Hong, C. I., J. Zamborszky, and A. Csikasz-Nagy. 2009. Minimum criteria for DNA damage-induced phase advances in circadian
rhythms. PLoS Comput Biol 5:e1000384.
[11] Fu, L., H. Pelicano, J. Liu, P. Huang, and C. Lee. 2002. The circadian gene Period2 plays an important role in tumor suppression
and DNA damage response in vivo. Cell 111:41-50.
KSEA LETTERS Vol. 40 No. 3 April 2012 15

TECHNICAL ARTICLES
COOPERATIVE CONTROL AT TRAFFIC LIGHT HARNESSED BY WIRELESS CARS
[Byungkyu “Brian” Park, KSEA Publication Director I]
Associate Professor and Graduate Program Director, Civil and Environmental Engineering
University of Virginia
INTRODUCTION
Figure 1. Two Schools of Fish Moving
through “Fish Intersection”
Everyone hates waiting at traffic lights. As more cars travel through the urban streets, it
is inevitable that cars have to stop at the intersection – this happens whenever demand
exceeds supply as we understand from the Economics 101 class. This is common at the
intersections in metropolitan areas where an intersection has to serve cars from multiple
approaches. Does it happen to fish? Not really! As shown in Figure 1, anyone enjoys scuba
diving would have seen how two schools of fish moves through “fish intersection” without
collision (IEEE, 2004). One might wonder why cars cannot cooperatively move just like the
fish! Obviously, it is not likely for cars unless human drivers completely give up their egos
and cooperative control becomes possible. To ensure cooperative control, cars should be
able to effectively communicate and an algorithm should be devised. A recent US Department
of Transportation’s initiative on Connected Vehicle technology presents a possibility
of such cooperative control based on wireless communications among vehicles and infrastructure
(US Department of Transportation).
METHODS
A driver may travel through an intersection without stopping when the intersection is controlled by YIELD sign and there is sufficient
gap available. This happens when there are few cars. As more cars try to cross the intersection, drivers have to stop at the intersection
and have to look for safe gaps. What if wireless cars that are capable of communicating each other within a certain distance
are abundant waiting for cooperative control? Then, one can predict car’s trajectory to the intersection area where collision might
occur. As shown in Figure 2, a collision between two conflicting trajectories (i.e., cars movements) at the intersection is about to
happen (see the two trajectories cross at lw area, representing intersection area), but the collision could be avoided with trajectory
adjustments. An easy option would be that one car goes faster and the other car goes slower than their current speeds. The trajectory
adjustments mean that cars will cooperatively adjust their acceleration rates to avoid collision. This approach can be formulated as a
nonlinear constrained optimization (Lee & Park, 2012). The objective function minimizes overlaps among conflicting cars within the
intersection collision area, while constraints include minimum and maximum acceleration rates, minimum and maximum speeds,
and minimum headway between cars.
Figure 2. Concept of Cooperative Control Algorithm
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TECHNICAL ARTICLES
Figure 3. A Snapshot of an Intersection under Cooperative
Vehicle Intersection Control
There are a few solution approaches to the proposed nonlinear constrained
optimization problem. Both analytical and heuristic approaches
are considered. The former includes active set method (ASM) based on
Sequential Quadratic Programming and interior point method (IPM)
based on the calculation of the Karush-Khun-Tucker (KKT) conditions.
A known limitation in these algorithms is that their solution depends on
an initial solution and may not converge to acceptable solution. The latter
include genetic algorithm and shuffled frog leaping algorithm that are
based on the evolution and natural selection. It is generally understood
that the latter heuristic algorithms have often better chance to find an
acceptable solution while they need longer computation time. Figure 3
shows an example of the proposed cooperative control realized in a virtual
world based on the solutions could be found from these algorithms.
PERFORMANCE EVALUATION
To conduct an evaluation, it is assumed that cars are fully automated, optimal controls are developed and implemented for real-time
cooperative control and no communication latencies exist between cars and infrastructure. To quantify the benefits of the proposed
cooperative control algorithm, mobility and sustainability measures including travel time, stop delay, CO 2
emissions and fuel consumptions
were utilized. A hypothetical intersection was developed using a microscopic traffic simulation model, VISSIM, and multiple
volume scenarios were generated through an experimental design. To establish baseline performance, the intersection control
based on actuated control (AC) was used. It is noted that AC is the state of practice control method most commonly used in the traffic
light control.
The overall performances of the proposed algorithm compared to an actuated control (AC) are summarized in Table 1. The proposed
approach reduced the total stop delay times by 99%. Total travel times and throughputs were also improved by 33% and 8%, respectively.
Air quality and energy savings were also significant: 44% reduction of CO 2
emissions and 44% reduction in fuel consumption.
Measure Measure (Unit) Proposed AC Gain
Mobility Average total stop delay time (Hour) 0.1 12.1 99%
Measures
Average total travel time (Hour) 25.1 37.2 33%
Sustainability Carbon Dioxide (CO2) (ton) 263.7 471.0 44%
Measures
Fuel Consumption (Liter) 120.9 215.2 44%
Table 1. Evaluation Results between the Proposed and Actuated Control
CONCLUDING REMARKS
Based on a simulation-based study at a hypothetical intersection, the potential improvements of the cooperative control over conventional
actuated control were evaluated under varying traffic congestion conditions. The results showed that the cooperative control
outperformed conventional actuated control.
It is recommended several factors should be carefully considered and evaluated through physical and simulation test-beds before
deploying the proposed cooperative control in the real world. These factors including system architecture (i.e., central, distributed or
hybrid controls), protocols on vehicle-to-vehicle and/or vehicle-to-infrastructure communications, solution algorithm and computation
power should be determined to ensure that the feasibility of the real-time implementation is guaranteed.
REFERENCES
IEEE. (2004, February). Cooperative Control School. IEEE Control Magazine, p. 104.
Lee, J., & Park, B. (2012). Development and Evaluation of a Cooperative Vehicle Intersection Control Algorithm under the Connected
Vehicles Environment. IEEE Transactions on Intelligent Transportation Systems,, 81-90.
US Department of Transportation. (n.d.). Retrieved March 30, 2012, from Connected Vehicle Technology Website: http://www.its.dot.
gov/connected_vehicle/connected_vehicle.htm
KSEA LETTERS Vol. 40 No. 3 April 2012 17

WORKSHOP ON INTRODUCTION TO INSTITUTE FOR BASIC SCIENCE
WORKSHOP TO INTRODUCE THE INSTITUTE FOR BASIC SCIENCE (IBS)
AND ADVISORY COMMITTEE MEETING FOR VICE MINISTER CHANG-KYUNG KIM
OF MEST IN BOSTON ON FEBRUARY 8-9, 2012
Administrative Director Kyung-Taek Chung and his staff member of
IBS introduced the newly established research institute that aims at
leading the basic science research in the world. IBS is the first major
establishment as part of the large-scale comprehensive International
Science and Business Belt (ISBB) project in Korea. Audience was impressed
about the opportunity and felt that IBS is destined to become
a “research institute of scientists’ dream” where world-class scientists
can undertake research with the utmost freedom and autonomy. As
you can see in the photo, IBS provided a dinner to all participants at
the Inn at Harvard.
A workshop for introducing Institute for Basic Science (IBS, www.ibs.re.kr),
Daejeon, Korea, was held at the Inn at Harvard on February 8-9, 2012. Nearly
100 young scientists and engineers were in attendance for the introduction
of IBS event on the February 8 th , and 15 distinguished scientists and
engineers attended the advisory committee meeting for IBS on February
9 th . Both events started with a motivational speech by Vice Minister Chang-
Kyung Kim of Ministry of Education, Science and Technology, wearing a
red MIT alumnus shirt, who captivated the audience about the opportunity
for basic research in Korea with his humor. During the Q&A session, he
took off his jacket to show off his red shirt with a MIT logo saying it is too
hot in the room. Young scholars were impressed with his straightforward
answers to their pointed questions.
Next day, 15 distinguished scholars were invited to give inputs to Dr. Chang-Kyung Kim and top officials of IBS. President Hosin
Lee, Advisor Jim Gates, Editorial Board Hongkun Park, Former President Nakho Sung, Former President Kang-Won Wayne Lee,
Executive Director Yongho Sohn, TG Director Eun-Suk Seo, HO Director Kyungjae Myung (NIH) and other distinguished scholars
from Harvard took their time to help them start a world-class basic research institute with new perspectives. The meeting lasted
nearly three hours and covered many different aspects of IBS from philosophy of research to very-detailed-practical operations.
Each advisory committee member gave her/his advice on the operation of IBS and Vice Minister Kim took his time in responding
to each piece of advice. All participants came away with the positive perspective for the new research institute that would lead the
world with a great leadership.
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MOU SIGNED WITH ADVANCED TECHNOLOGY CENTER ASSOCIATION (ATCA)
MOU BETWEEN KSEA AND ATCA
DURING A WORKSHOP AT SILICON VALLEY ON MARCH 5, 2012
Advanced Technology Center Association (ATCA) (atca.or.kr) is an invitation-only association that consists of “World-Class” companies
(typically small to medium sized) that strive for world’s largest market share for their products. More than 30 CEOs and
Chief Technologists from ATCA members seeking recent technology trends and business opportunities gathered at KOTRA office
in Silicon Valley for a workshop on March 5, 2012.
The workshop began with three technical presentations covering IT, Device Technology and
Materials. Prof. Simon Shim from San Jose State University presented recent trends on computing
technology with emphasis on storage technology and planning along with future strategies
for business start-up and IP development. Then, Prof. Hanseup Kim (KSEA Membership Director)
from University of Utah presented an overview of micro-devices and materials needs
for energy and biological applications including optimization of energy harvesting. He also
presented a world of biological system as fascinating electrical systems signals and chemical
signals, where fluid control is critical to emulate.
Finally, Prof. Yongho Sohn (KSEA Executive Director) from University of Central Florida presented
a perspective on world’s energy production and recent research trends for coatings in
advanced gas turbines and superlight-weight hierarchal hybrid composites.
President Hosin Lee gave an introduction of KSEA and concluding remarks. The workshop
concluded with a signing ceremony of MOU between KSEA and ATCA. Chapter President Jun
Young Huh of KSEA Silicon Valley Chapter and his staff joined us for the MOU ceremony. The
event was capped with a dinner hosted by ATCA. During a dinner time representatives from
participating companies briefly introduced their product lines and future R&D interests.
KSEA LETTERS Vol. 40 No. 3 April 2012
19

KSTLC 2012
MESSAGE FROM THE CONFERENCE CO-CHAIRS & WELCOMING RECEPTION
SUMMARY OF KSTLC 2012
“PIONEERING THE FUTURE”
Conference Co-Chairs
Hyunkyung Kathy Lee, DaEun Rachel Park, YeEun Sarah Rhee
The 1 st Korean Student Technical and Leadership Conference (KSTLC) held in Chicago during March 16-18, 2012 was a great success
with over a hundred students and young professionals from all across the US. All programs including the welcoming reception,
keynote speaker presentations, career panels, technical poster session, advanced presentation workshop, and even the evening
social events could not have been possible without the great leadership of Dr. Byoung-Do Kim (KSEA YG Director 1) and the many
hours put in by our 25+ dedicated volunteer organizers.
KSTLC 2012 rang its starting bell with an opening remark by KSEA President Hosin “David” Lee (University of Iowa). Along with
his expression of KSEA’s devotion to the YG movement, our two distinguished keynote speakers, Dr. Chul Ahn (UT Southwestern)
and Dr. Esther Yang (Abbott Lab), gave insightful presentations on how to construct successful lives as scientists and engineers and
on the expanding roles of scientists and engineers in global economy. Beyond speaker presentations, our participants were privileged
to attend special workshops on networking and presentation skills by Mr. Dan Conrod (Dale Carnegie) and Dr. Dan Moser
(Northwestern University). Additionally, through the Career Development Workshop, the participants were able to attend a panel
discussion consisting of distinguished members from academia, industry, national research, or medicine and pharmaceutics. The
participants had opportunities to interact with the panels by asking questions and expressing their concerns on specific topics that
are related to corresponding area of interest. Afterwards, the poster presentation session was held for about two hours and over
sixty participants presented their research findings to the fellow peers at the conference.
On behalf of the KSEA, 25 volunteer organizers, and over a hundred KSTLC participants, we would like to send our sincere appreciation
to our our corporate sponsors of KEIT, KOSEN21, KWiSE, and LG Electronics as well as patrons of Chul Ahn, Hosin
Lee, Hanseup Kim and Yongho Sohn for financial support of KSTLC 2012.. Lastly, to all attendees, we would like to thank you for
all the effort and active participation which allowed KSTLC 2012 to have a great start. Each individual’s presence was an asset to the
conference in creating an exciting, nurturing, and diverse atmosphere among the most talented Korean-American future leaders
in science and engineering field. We truly hope this conference was guidance in shaping you into the future pioneers of the world.
Let us meet all again in KSTLC 2013.
WELCOMING RECEPTION
[Session Chairs: Tae Gyun Chung, Dongjun Kim]
Undergraduate Students, University of Southern California
The 1 st KSTLC welcomed its participants at the reception with a welcoming
speech by KSEA 40 th President Hosin “David” Lee. The first official program of
the conference started out with the speed networking session which provided
quick greetings among participants in which they could share their name and
short background. After the short introduction of YG directors and committee
members, everyone moved onto the ice-breaking games. Grouping approximately
twelve people per team, the setting endorsed building up close
relationship among the team members. Even some of the panels joined the
event and doubled the fun. This session was informal, but at the same time it
was very engaging. And everyone just simply loved it!
KSEA LETTERS Vol. 40 No. 3 April 2012 21

KSTLC 2012
PLENARY PRESENTATIONS & POSTER SESSION
PLENARY PRESENTATIONS
Hosin “David” Lee, President of KSEA and Professor of Civil and Environmental Engineering at University of Iowa
At KSTLC 2012, Dr. Lee gave an inspiring speech about his life time experience along with his association with KSEA.
He also shared the activities of KSEA and its record breaking statistics on membership and funding. Dr. Lee’s sense
of humor captured all the audiences’ attention and made them start this memorable event with a smile on their face.
Chul Ahn, Professor of Clinical Science at UT Southwestern Medical School & Director of Biostatistics Core at Simmons
Cancer Center
At KSTLC 2012, as a keynote speaker, Dr. Ahn gave a speech on how to construct a successful life. He described an individual’s
life as connecting dots by referring to Steve Jobs. As if more dots depict more complex and detailed pictures
in a dot-to-dot puzzle, the diverse experiences enrich the quality of lives and pave the way for the time that is to come.
Se-Chan Jang, Team Lead, Office of R&D Program Management, KEIT
Korea Evaluation Institute of Industrial Technology (KEIT) presented international research collaboration opportunities
in various science and engineering fields. KEIT awards and manages more than $1.65B annually to the private and
public sectors, focusing on fostering emerging technologies.
Sang-Il Lee, Vice President of KEIT
As a representative of KEIT, Mr. Lee gave a warm welcoming and congratulation on the first KSTLC, and expressed
his pleasure of supporting its great start. This year, KEIT has made a generous donation to provide young students a
unique atmosphere to enjoy meals with panels and other peers at a networking lunch and a dinner banquet.
Esther Yang, Sr. R&D Director in Diagnostic Division at Abbott Lab
At KSTLC 2012, as a keynote speaker, Dr. Yang shared about the role of health-care careers in global economy. She
pointed out that in rapidly growing world economy, the goal of science and engineering should be as followed: differentiated
knowledge integrator, value creator, systems thinker, and servant leader. She also stressed out the importance
of exceptional communication skills for the transfer of the usefulness and assessment of technology
Sang Hee Yoo, President of Korean-American Women in Science and Engineering (KWiSE); Vertex Pharmaceuticals
Dr. Yoo introduced the variety of opportunities available for our future female leaders in science and engineering field.
KWiSE is active over the entire nation, seeking to promote the development of female Korean-American scientist and
engineer community as a whole group by sponsoring conferences, including KSTLC.
John Lee, YG Committee Chair of KSEA
John held a special report session on UKC 2012 and KSEA-YG activities. He encouraged the participants to apply for
UKC 2012, the largest KSEA annual conference, which will be held in L.A. in August 8th-11th, 2012. Many YG activities
including YGTLC, YGF and KSTLC were highlighted.
POSTER SESSION
[Session Chairs: Pilbum Kim, Kyungsoo Kim, Kyoungsun Rha]
Ph.D. Candidate, UCLA & Ph.D. Student Penn State University & Undergraduate Student, University of Utah
A great number of the first generation Korean students, due to the language barrier and
the cultural differences, face the challenge of becoming active and extrovert. It is unfortunate
that their wisdom, intelligence, and creativity remain in shade. KSTLC has been
established with a mission to help those students pursue professional careers in the US.
Along with many beneficial programs of KSTLC, the technical poster session provided
participants with the opportunities to improve their presentation skills in an Englishspeaking
professional setting. There were more than 60 posters from a variety of research disciplines. The presenters were passionate
about their research projects and excited to share their hard-earned knowledge with others. Concerning the fact that most
presenters were the first generation, despite the hardship in having to present in non-native language, the contents of the posters
were very well delivered in general. It was truly inspiring to see many outstanding Korean students strive for their dreams, and it
showed the bright future ahead for the Korean scientists and engineers working in the country.
22
KSEA LETTERS Vol. 40 No. 3 April 2012

KSTLC 2012
SESSIONS AND WORKSHOPS
DALE CARNEGIE INSTITUTE SPECIAL SEMINAR: CREATING CONNECTION
[Conference Co-Chair & Session Chair: YeEun Sarah Rhee, Jungsook Yang]
Undergraduate Student, University of Michigan & Software Engineer, Netapp
After KSEA President Hosin “David” Lee opened up the first door of KSTLC, Mr. Dan Conrod took the
lead and gave us a special privilege to learn the methods of communications. He discussed the importance
of social networking and presented the ideas of the ‘good communication.’ As a program that started
off the entire conference, it set a very welcoming and open environment. The speaker, Dan, had everyone
to stand up and practice communication skills which encouraged the participants to actively engage
themselves in conversations with brief self-introductions. Though “creating connection” was mainly about
networking, it rather promoted a necessity
of self-reflection. According to Dan,
a successful networking requires confidence,
patience, enthusiasm and perseverance. To build a great
relationship with people, we need to be open and approachable
to others first which requires the confidence and courage. Then
the conversation needs to be followed by patience such as being
a good listener and letting the opponent become a focus of the
conversation. The participants discussed about these practical
skills and values for the effective ways of communications, and
tried to apply these at a personal level. This session was well suited
for the purpose of the conference which promotes networking
among Korean-American students on the paths to become the
pioneers of the future.
ADVANCED PROFESSIONAL PRESENTATION SKILLS
[Session Chair: Yoomin Ahn, Wonjae Lee]
R&D Chemist, BISCO, Inc & Ph.D. Student, University of Pennsylvania
This was a unique session for KSTLC with the purpose of helping first generation Korean students improve
their presentation skills. Our goal was to have a before and after presentation of students to show
the improvement through a professional workshop in public speaking. Dr. Dan Moser worked with
our two volunteers, Tae Gyu Kim and Youngbum Jun, in perfecting their speeches and powerpoints.
The preparation for this session began a month before the conference. And throughout February, the
volunteers sent Dr. Moser their original videos and slides, and received feedback from him. On the
night before the presentation, the volunteers worked with Dr. Moser one-on-one for a couple of hours.
On the day of the workshop, Dr. Moser started off the session with a short speech on the important
factors in public speaking which was followed by the actual presentations. After showing the before
videos, two volunteers stood up in front of a hundred students and performed the improved presentations. As a 1.5 generation
student who came to the United States at the early ages, the only concern Tae Gyu had was a nervousness management when facing
a huge crowd. On the other hand, Yongbum, who came to the U.S. in his mid-twenties, had a language barrier to overcome
and was not confident about his English skills. When they walked up to the stage, however, it was evident that from a month-long
interaction with Dr. Moser, they had gained enough courage and were more than ready for the presentation. Especially, the 1st
generation student, Youngbum, showed a great improvement on public speaking and grabbed everyone’s attention with his sense
of humor, despite his difficulties with the language.
Overall, the lecture had entertaining elements along with useful presentation tips. The volunteers also gave great presentations
that were comical as well. It was helpful to see that the presentation skills can be improved over a course of period. Moreover, the
participants were able to learn the successful and effective skills for the professional presentation.
KSEA LETTERS Vol. 40 No. 3 April 2012
23

KSTLC 2012
SESSIONS AND WORKSHOPS
CAREER DEVELOPMENT WORKSHOP
[Session Chairs: JaiKyoung Jung, Wendy Shin, Chloe Sonya Kim, Chulwoo Park]
Post-Doc; Virginia Tech, Software Product Manager; Caltech,
Undergraduate Student; Northwestern University, Undergraduate Student; University of Utah
I) Industry- Seung-Woo Choi, RCA Leader, GE Energy; Young Seok Lee, Research Scientist, Motorola; Chul Young Park, Lead Engineer,
Boeing; Paul Park, Engineering Supervisor, Caterpilla Inc.; Sung Kwan Pyun, Lead Systems Engineer, GE Health Care - Surgery
The panels briefly gave self-introductions, which were followed by answers to questions chosen
from a survey conducted prior to the conference. Dr. Paul Park, helped distinguish the
field of industry from academia and emphasized “creativity” and inspired participants with a
quote, “Success is a combination of integrity and confidence”. Then, Dr. CY Park explained the
two different tracks of industry, management and research fellow tracks, and provided tips on
interviewing skills. He encouraged students to follow their passion. Dr. YS Lee described the
team structure of his company and the hiring process. Dr. SW Choi gave talk on communication and presentation skills. Lastly,
Mr. SK Pyun led a discussion on the visa support issues, which grasped the attention from the 1 st generation.
II) Academia- Ken Choi, Assistant Professor of ECE, IIT; Youngjae Chun, Assistant Professor of IE and BE, U. of Pittsburgh; Hyunwoo
Lee, Research Assistant Professor of Biology, U. of Illinois-Chicago; Yong Ho Sohn, Professor of MM and AE, U. of Central Florida
The first panelist, Dr. Choi presented a brief overview on differences between industry and
academia. He mentioned different research styles at industry, which helped him decide to
devote his work to practical studies after he started his career as a professor. Then Dr. Chun
shared his hardships of becoming a professor as a 1 st generation student in US. His life experience
touched a lot of 1 st generation participant’s hearts. He also encouraged students to branch
out the research topics while continuing the work that previous professor has achieved. Dr. Lee
emphasized the importance of professional writing and grant proposal. He advised participants to not be afraid of the critics, but
rather be open to the feedbacks. Lastly, Dr. Sohn gave tips on the grant proposal and the ethics future professors should pursue. He
pointed out the significance of the relationship with senior professors and fund providers.
III) National Research Lab- Seungbum Hong, Materials Scientist, Young Soo Park, Engineering Staff, Argonne National Lab
With about 10 participants, we had a small group which actually allowed for a smooth,
comfortable discussion session. The setting of the room was changed so that everyone
would sit facing each other, instead of separating the panelists and the participants. It
started with simple introduction for each panelist, followed by Dr. Park’s short powerpoint
presentation about his research. Then it went straight into the question and answer portion
of the discussion. With all participants very actively involved, many aspects of the career in
the lab were covered, and a good number of the participants exchanged personal contact information with the panelists.
IV) Medical and Pharmaceutics- Taeok Bae, Assistant Professor, Indiana University- School of Medicine; Hyunyoung Jeong,
Assistant Professor of Pharmaceutics, U. of Illinois-Chicago
A pre-survey was done to collect questions for the following criteria: entrance to the medical schools, M.D./Ph.D. program, research
opportunities in health sciences, and panels’ backgrounds and experiences.
Fortunately, we had current medical school students, which created a unique atmosphere
for both participants and the panels to share their experiences freely. The admission process
was the the most talked about since majority of participants were undergraduate
students. The rest of topics were also covered based on the students’ voluntary questions
which broadened their perspectives on careers in the health sciences field. Overall, this
session was very successful in shaping future doctors, vets and pharmacists and encouraging
them to interact and bond with the panels and other participants.
24
KSEA LETTERS Vol. 40 No. 3 April 2012

KSTLC 2012
AWARDS
AWARDS CEREMONY
[Conference Co-Chairs: DaEun Rachel Park and YeEun Sarah Rhee]
Undergraduate Students, Johns Hopkins University & University of Michigan
Outstanding poster presentation awards were given out to nine participants, two in each science domain including biological
and medical science (BM), chemical, civil, environmental and material engineering (CM), electrical and computer science engineering
(ES), and mathematics, mechanical engineering and non-natural science (MN). Every poster presentation was evaluated
by our critical reviewers consisting of eighteen panels and speakers from various fields. In addition, three undergraduate
participants were awarded for the three best essays, and three more were honorably mentioned. To make this recognition more
memorable, beautiful roses were also handed to female awardees.
Technical Poster – Biological, Medical
1 st Place ◆ Sa Do Kang, Duke University, "Developing Efficient Methods for Isolation of Endothelial Progenitor Cells"
2 nd Place
◆Ja Kyung Lee, U of Pennsylvania, "RP58 transcription factor inhibits oligodendrocyte differentiation"
◆Bum Jun Kim, U of Utah, “Does ceramide contribute to vascular dysfunction in mice with type 1 diabetes”
Technical Poster – Chemical, Civil, Environmental, Material
1 st Place ◆ Woon-Hong Yeo, UIUC, "Multifunctional, skin-like electronics"
2 nd Place ◆ Seung-Jin Lee, U.S. Environmental Protection Agency, "Biofuels: A Review of a Life Cycle Environmental Impacts"
Technical Poster – Electrical, Computer Science
1 st Place ◆ Jaeyoung Choi, UC Berkeley, "Semantic Computing and Privacy: A Case Study Using Inferred Geo-Location"
2 nd Place ◆ Jaeeun Shim, Georgia Tech, "Biologically-Inspired Deceptive Behavior for a Robot"
Technical Poster – Mechanical, Mathematics, Non-Natural
1 st Place
◆ Jun Suk Rho, UC Berkeley, "Spherical Hyperlens for Two-dimensional Sub-diffractional Imaging at Visible Frequencies"
2 nd Place
◆ Seul Ki Kang, Texas A&M University, "Multiscale simulations for Richard's equation in high-contrast media and
applications"
Essay Contest
1 st Place ◆ Clara E. Park, University of Washington, "Network for Your Success"
2 nd Place ◆ Haena Kim, University of British Columbia, "Questions"
3 rd Place ◆ Soo Yeon Selene Kim, Princeton University, "Ms. Efficiency"
Honoral
Mention
◆ Daniel Young Lee, Andrew Park, Yeo Ho (Patrick) Yoon
Advisory Committee
◆ Byoung-Do Kim ◆ Benjamin C. Lee ◆ Israel ‘Sun Min’ Jung
(YG Director 1) (General Director) (YG Director 2)
Organizer Recognition
DaEun Park, Hyunkyung Lee, YeEun Rhee, JaiKyoung Jung, Pilbum Kim, Yoomin Ahn, Meeae Hong, Yumi Lim, HyounAe Min,
Wendy Shin, Chulwoo Park, Chloe Sonya Kim, Kyungsoo Kim, Dongjun Kim, Kyoungsun Rha, Seung-Jun Kim, Wonjae Lee,
Taewoo Ha, Hea Ryung Kim, Tae Gyun Chung, Youngbum Jun, John S. Lee, Jungsook Yang, John Cho, Steven Chong
Sponsor Recognition
KEIT (Korea Evaluation Institute of Industrial Technology), LG Electronics, KOSEN21(KISTI), KWiSE, Chul Ahn, Hosin ‘David’
Lee, Hanseup Kim, Yongho Sohn
KSEA LETTERS Vol. 40 No. 3 April 2012
25

KSTLC 2012
POST-KSTLC 2012 COMMENTS & TESTIMONIALS
WHAT THE KSTLC 2012 PARTICIPANTS SAID
It was a truly informative and enjoyable conference and also great to see so many awesome young Korean professionals
in science and engineering! I was surprised to have so many outstanding leaders already well-established and stood up
as leaders in their field as well from the panel discussion. I hope that we, as Korean-spirited professionals, can build our
strong backgrounds here in the states in this way. Thank you KSTLC and KSEA for making this possible!
- Claire Gayoung Jeong (Post-Doc, Duke University, Durham, NC)
It was an awesome and inspiring event again!! KSEA events always give me motivation to work hard and study hard
whenever I feel like to settle for the present. Big Thank you, Organizers!
- Hangyeol Ryu (Senior Undergraduate, University of British Columbia, Port Moody, Canada)
I was very honored to be at the very first KSTLC conference! I will for sure remember it forever! I got to meet a lot of
Korean students studying abroad like me which was very encouraging and inspiring. I definitely would like to join any
future event of KSEA! Good job organizers! I sincerely thank you!
- YeEun Park (Mechanical Engineer - Manufacturing, Ford, Ann Arbor, MI)
KSTLC 2012 was great experience in Chicago. It helped me meet lots of diverse people and inspired me to work harder
for the future, especially in my studies. Thank you for an unforgettable memory!
- Brian Keum (Senior Undergraduate, University of Michigan, Ann Arbor, MI)
Before I attend KSTLC 2012, I honestly had few expectations about it. I was excited about rather visiting Chicago than
the event. However, I got so much fun and valuable memory after I met nice, handsome people and had awesome
program at KSTLC. Everybody was so nice and fun and the program itself was very productive. I highly recommend
people to participate this awesome event! Two thumbs up!
-Seul Ki Kang (Ph.D. Candidate, Texas A&M University, College Station, TX)
It was amazing experience and I learned a lot by meeting new people during the conference. The industry session was
impressive and I gained practical advices. Thanks for this great opportunity!
- Hyuk-Jin Park (Senior Undergraduate, USC, Los Angeles, CA)
“BEING A STRANGER”
[Yuna Shim]
MS Candidate, University of Washington
Walking into the hotel, waiting for registration, watching people talking to each other, having a strong feeling that everyone
seems to know each other and realizing I know zero people here so there’s no room for me to join. This was not so
pleasant experience when I first participated in YGTLC and this KSTLC was not much different. I barely knew anybody
and felt intimidated again. However, I knew that this would turn out to be really great. YGTLC and KSTLC taught me
that stepping out of my comfort zone and challenging myself to be a total stranger can make differences.
Since KSTLC had the smaller number of participants and was designed for 1 st generation Korean students only with the poster
presentation and essay contest, I was able to meet all participants in the same room and was able to talk to them while visiting their
booths. I especially enjoyed the field-specific conversation with the people who have the same interest and future goals with me. This
was the moment that “being a stranger” turns out really great, because I would never be able to meet and network with them if it
were neither KSEA nor the conference.
Sharing thoughts and hardships about studying in the US or about our future was another great feature of the conference as the majority
of participants are the students who came to the US alone. I believe the first KSTLC brought different perspective in networking
and building personal bonds depending on the language we use and the culture we grew up. This would be transferable to other
events and might help young generations to better understand each other as Korean-Americans. I really appreciate KSEA officers
and KSTLC organizers’ work to put everything together and let me have an amazing experience.
26
KSEA LETTERS Vol. 40 No. 3 April 2012

KSTLC 2012
TESTIMONIALS
“PATH FINDER”
[Youngbum Jun]
Ph.D. Candidate, Drexel University
As I continue my study at Drexel University as a fourth year Ph.D. student, I realize that the more I get into my own
research field, the narrower my choice on my career gets; the choice between academic career and other options outside
the academia. When I was in much need of guidance and mentorship, KSTLC 2012 was the perfect and fulfilling
opportunity. The academic panel discussion provided participants with extremely useful information on academic
career in the US. All the panelists were very enthusiastic about sharing their know-how’s in their career fields and personal
stories of their success and failures. Through the discussion and Q&A’s, I was able to see the big picture of the academic career.
“SUSPICION TO ADMIRATION”
[Dongjun Kim]
Undergraduate Student, University of Southern California
Despite of my long concern about how I can network with unfamiliar people, the happy hour social enabled me to not
only get to know others but also form an unbreakable, close friendship with them. Everyone in the conference shared
the same hardship in their challenged journey for career in the US whether it’s due to the English as a second language,
different culture, social custom, or academic difficulty. The shared trait of experience and culture was significant
enough to catalyze the highly energized covalent bonds among participants and discover their new stability assisted by new friends.
Moreover, extremely well-organized and brilliantly picked programs like Special Seminar on Networking & Communication by
Dale Carnegie Institute was just perfect for the participants who all suffered from the difficulty of communication and networking
in their 2 nd language. Particularly, Dr. Seungbum Hong, who works at the Argonne National Laboratory, deeply touched my heart
with his infinite passion to help the young; in his national lab technical session, Dr. Hong asked for the phone numbers and e-mail
addresses of every single participant and even took pictures of them so that he can not only help those desperate and hard-working
students but also form a profound, long-term mentor-mentee relationship through which he could constantly support his mentees.
Overall, I feel privileged to say that I leave with strong love toward my new friends, complete respect toward the mentors, and most
importantly, full admiration of the extremely hard-working organizers behind the curtain.
“OFF TO A GREAT START”
[Seung-Jin Lee]
Post-Doc, US Environmental Protection Agency
Prior to attending the conference, I didn’t know what to expect as this was the first KSTLC and I only knew a handful
of people. But once KSEA President Hosin Lee stepped onto the podium and delivered his opening speech, I knew we
were all in for something special. As usual, his humor did not fail to amuse us all. And I agree with him on one point:
my best decisions in life were marrying my wife and being a part of KSEA. Nothing in life is more valuable than health,
family and the people you’re surrounded by. I believe KSEA has provided a big chunk of that value. All the panelists
motivated me to work harder, and their invaluable words of advice were more than helpful in taking the next steps in my career.
Being a 1 st or 1.5 th generation Korean in the US can be pretty tough. There are cultural differences and language barriers to adapt to,
all of which can affect our experiences in school or workplace. Whether you’re here to start a business, get an education or simply
turn your life around, life as a foreign minority can be quite challenging, especially when there’s a lack of guidance along the way.
That’s why KSTLC felt very close to my heart. It was an event for people just like me who have had similar experiences and can
share their stories of success and failure. As one of the oldest participants, I felt grateful that I was able to share my experiences with
students and researchers in similar fields. However, in the end, I think I was the one most inspired. It was amazing to learn from all
the hard-working young professionals around the country. They definitely made me proud to be Korean.
Time flew by way too fast, and I only wish it had lasted longer. I’d like to thank KSEA President Lee, Dr. Byoung-Do Kim, and all
the organizers for putting together a very rewarding conference. Thanks to all the sponsors as well. Our experiences would not
have been so rewarding if not for all the hard work and time they invested. I look forward to being a part of KSTLC and KSEA for
a long time coming, so please continue to organize KSTLC and build on its programs. And don’t forget, we are now one big family!
KSEA LETTERS Vol. 40 No. 3 April 2012
27

KSTLC 2012
TESTIMONIALS
“HELLO TO KSTLC”
[John Cho]
Cost Information Systems Coordinator, Caterpillar Inc.
It was an absolute pleasure and honor to be your host in Chicago for KSTLC! I want to congratulate all the organizers
for their hard work and successfully completing the first ever KSTLC! It was great to meet so many up and coming
young professionals. This wonderful event reminded me to keep striving to challenge myself and to grow others to
become the future leaders of tomorrow. I’m very proud of each and every one of our KSTLC members, and I’m excited
to see what everyone will achieve in the upcoming years. I want to remind everyone that although KSTLC 2012 is over,
this is only the beginning. Reach out and continue networking with your KSEA peers!
“A BRIEF REFLECTION ON KSTLC CONFERENCE”
[Daniel Young Lee]
Undergraduate Student, Purdue University
The day before the Korean Student Technical and Leadership Conference (KSTLC), I fretted about in my room and regretted
my decision to participate in the conference. As one of the younger participants of the conference, I was afraid
that I was neither technical nor a leader- a shameful contradiction to the qualities the conference convened to celebrate
- and I increasingly doubted that my invitation was a mistake on the part of the admission committee. With no
expectation from the conference; I only hoped to be spared of the embarrassment by my lack of expertise in any field.
How wrong was I to expect nothing from the conference; I may have been the greatest beneficiary. My spirit lifted as I began to engage
in conversations with other delegates and listened to the speeches from the seasoned professionals in variety of fields. I gained
insights on the possibilities I had previously considered for myself, reversed my perceptions on the possibilities I had not wanted
for myself, and learned possibilities I had not imagined were possible for myself. The fear I held before the conference quickly dissipated,
and the energy of the conference, emanating from the enthusiasms of the conference organizers and the delegates themselves,
enabled me to shift my focus from depressing thoughts on what I currently lacked to the immense possibilities what I could achieve.
I return to Purdue University, where I am a sophomore undergraduate in mathematics, with a re-kindled optimism for my possible
contributions to the society. And it is my hope that as I continue my studies in mathematics, I can one day provide the same inspiration
to the younger generations of Korean-American students as the KSTLC delegates and speakers have done for me.
“WHY AM I HERE AGAIN?”
[Jeehong Peter Kim]
First Year Medical Student, University of Pittsburgh
Starting with the very first event of icebreaker to get to know each participant better, everyone in KSTLC spent the rest
of their three days very productively. Every minute, we were learning, thinking, or laughing during workshops and
various networking and social events. I met a lot of great people and became good friends with some of them including
my roommates who I still keep in touch with. KSTLC also provided me with unique opportunities to meet other
inspiring professionals such as Dr.Ahn Chul Woo, within the field of health care and connect with them.
However, one of the biggest assets I earned during KSTLC would be encouragement and passion for my own career. I was about
to finish my first year in medical school and was very exhausted from its demanding curriculum and highly competitive environment.
I also believed I had some shortcomings in language skills as a first generation student, and was secretly struggling with ideas
whether I could carry on my career successfully. However, after learning so many other fellow Koreans working hard and pushing
the boundaries in the frontier of cutting edge science and technology, I find myself more inspired to enjoy what I chose to do and
more confident that I can make the best out of myself. Now I am more motivated than before, and looking forward to finish strong
the rest of my first year and looking forward to participating in UKC in 2012 after completing my summer research. I thank KSTLC
for all the listed things, and all the other things I couldn’t list that are many. It was truly an amazing experience.
28 KSEA LETTERS Vol. 40 No. 3 April 2012

SPONSOR NEWS
2012 Ho-Am Prize Recipients
☐ The Ho-Am Foundation (Chairman Hyun-Jae Lee, former Prime Minister) announced the 2012 Ho-Am Prize recipients
on April 3 rd , 2012.
This year’s recipients in each field are:
◆ Prize in Science Prof. Minhyong Kim (Univ. of Oxford/POSTECH),
◆ Prize in Engineering Prof. Taeghwan Hyeon (Seoul National Univ.),
◆ Prize in Medicine Prof. Jae Ung Jung (Univ. of Southern California),
◆ Prize in The Arts Composer Unsuk Chin (Seoul Philharmonic Orchestra),
◆ Prize in Community Service Dr. Dong-han Lee (Chairman of Social Welfare Corporation Choon Kang)
☐ The Ho-Am Prize Ceremony is scheduled to be held at 3:00 p.m. on June 1 st , 2012 at Ho-Am Art Hall. Each recipient will
be awarded a diploma and a Ho-Am Prize medal with prize money of KRW 300 million. Prior to and after the ceremony, the
recipients are scheduled to hold commemorative lectures in major universities, high schools and academies across the nation.
2012 HO-AM PRIZE RECIPIENTS
Prize in Science
Prof. Minhyong Kim
Prize in Engineering
Prof. Taeghwan Hyeon
Prize in Medicine
Prof. Jae Ung Jung
Prize in The Arts
Composer Unsuk Chin
Prize in Community Service
Dr. Dong-han Lee
KSEA LETTERS Vol. 40 No. 3 April 2012
29

EVENTS
LOCAL CHAPTERS
South Texas
Spring Picnic (March 3, 2012)
Wisconsin
KSEA President Cup Tennis Tournament (April 14, 2012)
Alabama
YG Career Development Seminar (January 13, 2012)
University of Southern California
Rhythm and Hues Studio Tour (March 9, 2012)
Kentucky
Kentucky Winter Conference (January 14, 2012)
Southern Virginia
Tech Seminar with Prof. Philip Kim (March 16, 2012)
New England
Technical Symposium and YG Forum (February 25, 2012)
30
KSEA LETTERS Vol. 40 No. 3 April 2012

EVENTS
AFFILIATED PROFESSIONAL SOCIETIES
Korean Pathologists Association of North America (KOPANA)
11 th Spring Seminar (March 15-17, 2012)
Korean-American Materials Society (KAMS)
Annual Meeting (TMS 2012) (March 11, 2012)
Association of Korean Physicists in America (AKPA)
Korean Physics Symposium
(March 1, 2012)
Korean-American Offshore Engineers Association (KOEA)
& KSEA South TX Joint Technical Seminar
(February 16, 2012)
Korean Transportation Association in America (KOTAA)
23 rd KOTAA Annual Meeting (January 24, 2012)
KSEA LETTERS Vol. 40 No. 3 April 2012 31

SPONSORS OF KSEA

Korean-American Scientists and Engineers Association
1952 Gallows Road, Suite 300, Vienna, VA 22182
Tel: 703-748-1221. Fax: 703-748-1331
Email: sejong@ksea.org. Web: http://www.ksea.org
Directors Committee (40th Administration)
President: Hosin “David” Lee, Univ. of Iowa
319-335-6818, ksea40p@gmail.com
President-Elect: Hyung-Min Michael Chung, Calif. State Univ.
562-985-7691, ksea40pe@gmail.com
Vice President: Kookjoon Ahn, DOT
916-227-9257, ksea40vp1@gmail.com
Vice President: Hee-Koo Moon, Solar Turbines
619-544-5226, ksea40vp2@gmail.com
Executive Director: Yongho Sohn, Univ. of Central Florida
407-882-1181, ksea40ed@gmail.com
Finance Director: Seri Park, Villanova University
610-519-3307, ksea40fd@gmail.com
General Director: Benjamin Lee, INVIA Medical Imaging Solutions
734-678-1285, ksea40gd@gmail.com
Technical Group Director: Eun-Suk Seo, Univ. of Maryland
301-405-4855, ksea40tgd@gmail.com
IT Director: Sung Yi, Portland State Univ., ksea40itd@gmail.com
Headquarter Operations Director: Kyungjae Myung, NIH
301-451-8748, ksea40hod@gmail.com
Membership Director: Youngsoo Park, Argonne National Lab
630-252-5094, ksea40md1@gmail.com
Membership Director: Hanseup Kim, Univ. of Utah
801-587-9497, ksea40md2@gmail.com
Membership Director: JungAh Jung, Millennium Pharmaceuticals
973-752-5245, ksea40md3@gmail.com
YG Director: Byungdo Kim, Univ. of Texas at Austin
ksea40yd1@gmail.com
YG Director: Israel (Sun Min) Jung, The Boeing Company
425-263-2233, ksea40yd2@gmail.com
Publications Director: Byungkyu Brian Park, Univ. of VA
434-924-6347, ksea40pd1@gmail.com
Publications Director: Hyunggun Kim, Univ. of Texas HSC at Houston,
713-486-2342, ksea40pd3@gmail.com
Publications Director: Jaehoon Yu, Univ. of Texas at Arlington
817-272-2814, ksea40pd4@gmail.com
Headquarters Staff
IT Manager: Seung Seok Choi, 703-748-1221, it@ksea.org
Finance Manager: Kelly Han, 703-748-1221,finance@ksea.org
Admin Manager: Euna Yoon, 703-748-1221, admin@ksea.org
Accounting Administrator: Yoon Hee Chang, 703-748-1221,
database@ksea.org
Auditors
Gye Won Han, 858-784-7189, gyewon@scripps.edu
Sam Ryu, 832-377-7267, sam.s.ryu@gmail.com
Myung Jong Lee, 212-650-7260, mjlee999@yahoo.com
Elected Councilors
Group A: Physics
Eun-Suk Seo, 301-405-4855, ksea40tgd@gmail.com
Group B: Chemistry
Seogjoo Jang, 718-997-4110, seogjoo.jang@qc.cuny.edu
Group C: Mathematics, Geology, Meteorology, Statistics, Others
Yonil Park, 301-402-1438, yonil.park@gmail.com
Group D: Biology, Botany, Zoology, Biomedical Engineering,
Genetic Engineering
Jung Hyeob Roh, 713-500-6756, jung.h.roh@uth.tmc.edu
Chul Hee Kang, 509-335-1409, chkang@wsu.edu
Group E: Agriculture, Ecology, Food, Nutrition
Haejung An, 949-608-4408, haejung.an@FDA.HHS.gov
Group F: Medical Science, Pharmaceutical Science, Veterinary Medicine,
Physical Education
Kyoung-Jin Yoon, 515-294-1083, kyoon@iastate.edu
Group G: Chemical Engineering, Textile Engineering, Nuclear
Engineering, Petroleum Engineering, Applied Chemistry
Inchan Kwon, 434-243-1822, ik4t@virginia.edu
Group H: Mechanical Engineering, Aerospace Engineering, Naval
Architecture
Mun Y. Choi, 860-230-7003, choi@engr.uconn.edu
Bongtae Han, 301-405-5255, bthan@umd.edu
Group I: Materials Science, Metallurgy, Mining Engineering
Kyeong-Ook Lee, 630-252-9403, klee@anl.gov
Group J: Civil Engineering, Architecture, Environmental Engineering
Jun-Seok Oh, 269-276-3216, junoh3@gmail.com
Youngsoo (Richard) Kim, 919-515-7758, kim@ncsu.edu
Group K: Electrical & Electronics Engineering, Communication Engineering
Ki Wook Kim, 919-515-5229, kwk@ncsu.edu
Taek Jin Kwon, 732-758-3242, taekjkwon@yahoo.com
Group L: Computer Science, Systems Engineering
Kyung Dong Ryu, 914-945-2502, kdryu2000@gmail.com
Sam-Joo Doh, 781-565-5229, samjoodoh@yahoo.com
Group M: Industrial Engineering and Mgmt Science
Sunghoon Kim, 201-988-9094, stevekim.jsi@gmail.com
Former President Councilors
Jae Hoon Kim, The Boeing Company, 425-786-7723, jkim1@ieee.org
Chin Ok Lee, Rockefeller University, 212-327-8617, leech@mail.rockefeller.edu
Kang-Won Wayne Lee, Univ. of Rhode Island, 401-874-2695,
kwaynel@gmail.com
Chapter Presidents
Central Penn (1) Jungwoo Ryoo, 814-949-5243, jryoo@psu.edu
Georgia (3) Chulsung Kim, 678-407-5776, ckim@ggc.usg.edu
Indiana (4) Chan Kyoo Choi, choi@purdue.edu
Michigan (6) Hahnsang Kim, 734-223-7284, hahnsang.kim@gmail.com
Chicagoland (7) Duck Young Chung, 630-252-4907,
dychung.ksea@gmail.com
Minnesota (8) Yunje Oh, 952-835-6366, ohyunje@hotmail.com
New England (9) Sangun Lee, 508-887-4564, sangun69@gmail.com
New Jersey (10) Hong-Yong Kim, hongyong.kim@novartis.com
NY Metro (11) Jun Ho Shin, 718-631-6255, jshin@qcc.cuny edu
N. Carolina (12) Sung Woo Kim, 919-513-1494, swk.ncsu@gmail.com
Ohio (14) Bomjun Kwon, 614-366-8377, bjkwon@gmail.com
Seattle WA (15) Wookuen Shin, geoshin@gmail.com
Philadelphia (16) Jin S. Kang, jinkang@drexel.edu
St. Louis (17) Jayoung Choi, 310-562-7917, kseastl@gmail.com
Southern CA (18) Chan Seung Park, 951-781-5771, cspark@cert.ucr.edu
South Texas (19) Sukjoo Choi, 281-249-8732, sukjoo.choi@gmail.com
Wash. Metro (21) June M Kwak, 301-405-9726, jkwak@umd.edu
Alabama (23) Dong Joo Daniel Kim, 334-844-4864, dkim@eng.auburn.edu
Austin TX (24) Jinwoo Lee, 512-785-2098, jinwoo@mail.utexas.edu
Silicon Valley (30) Jun Young Huh, heymosoo@yahoo.com
Baltimore (31) Mihyun Bae, 443-804-7507, niceangel075@hotmail.com
Tennessee (32) Thak Sang Byun, byunts@ornl.gov
N. Texas (40) Jiyoung Kim, 972-883-6412, jiyoung.kim@utdallas.edu
Central VA (41) Jungwook Jun, jungwook.jun@vdot.virginia.gov
KSEA LETTERS Vol. 40 No. 3 April 2012 55

Central IL (42) Seung-Yul Yun, 217-255-8540, Yes.Andrew@gmail.com
Southern VA (49) Dong S. Ha, 540-552-1965, ha@vt.edu
Iowa City (52) Yang Oh Jin, yangoh.jin@gmail.com
Utah (56) You Han Bae, 801-474-1945, you.bae@utah.edu
Sacramento (58) Young Lee, 916-227-7645, ylee0617@hanmail.net
San Diego (60) Yongkyoon In, 858-455-6655, yongkin@alum.mit.edu
Oregon (62) Sung Yi, sungyi19@hanmail.net
North Dakota (65) Chiwon W. Lee, 701-361-9411, chiwon.lee@ndsu.edu
Central FL (67) Hyoungjin Cho, 407-927-4301, joehcho@gmail.com
Tampa Bay (68) Myung Kim, mkkim@usf.edu
Kentucky (903) Duk-Hyung Lee, 859-858-3511, duk.lee@asbury.edu
KSEA Korea (905) Tammy Cho, 82-18-282-7995, btheb_02@naver.com
Committee Chairs
Contest Committee:
Kookjoon Ahn, 916-227-8357, kookjoon_ahn@dot.ca.gov
Election Committee:
James Song, 301-602-2206, james.song.nih@gmail.com
Fund Management Committee:
Kang-Wook Lee, 914-945-3070, kangwook.lee.ibm@gmail.com
History Committee:
Yong Nak Lee, 847-577-5967, ynlee@htrdltd.com
Honors and Awards Committee:
Sung Kwon Kang, 914-945-3932, sungkang.ksea@gmail.com
Long-range Planning Committee:
Saeyoung Ahn, 301-646-6602, saeyounga@yahoo.com
Nomination Committee:
Jae Hoon Kim, 425-786-7723, jae.h.kim@boeing.com
Rules Committee:
Nak Ho Sung, 617-627-3447, nsung@tufts.edu
Scholarship Committee:
Seong Gon Kong, 215-204-7932, skong@temple.edu
Young Generation Committee:
John Hyung Lee, 310-280-8269, johnleelp@gmail.com
Local Chapter Presidents Committee:
Wookeun Shin, 206-714-4110, geoshin@gmail.com
Affiliated Professional Society (APS) Presidents
Association of Korean Neuroscientists (AKN)
Jin Mo Chung, University of Texas, jmchung@utmb.edu
Association of Korean Physicists in America (AKPA)
Eun-Suk Seo, University of Maryland, seo@umd.edu
Baltimore Life Scientists Association (BLSA)
Woochang Hwang, Johns Hopkins University, whwang2@gmail.com
Korean American Construction, Engineering, and Project Management
Association (KACEPMA)
Young Hoon Kwak, George Washington University, kwak@gwu.edu
Korean-American Food Technologists Association (KAFTA)
Youngmo Yoon, Sensient Flavors LLC, flavor331@yahoo.com
Korean-American Intellectual Property Lawyers Association (KAIPLA)
Joo Mee Kim, Rothwell, Figg, Ernst & Manbeck, P.C., jkim@rfem.com
Korean-American Materials Society (KAMS)
Jiyoung Kim, University of Texas at Dallas, jiyoung.kim@utdallas.edu
Korean-American Mathematical Scientists Association (KAMSA)
Hae Soo Oh, University of North Carolina at Charlotte, hso@uncc.edu
Korean-American Society for Biomedical Informatics (KASBI)
James S. Song, National Center for Biotechnology Information
National Institutes of Health, james.Song@nih.gov
Korean American Society for Biotech & Phamaceuticals (KASBP)
Yong-Hae Han, Bristol-Myers Squibb, yong-hae.han@bms.com
Korean-American Energy Exploration & Production Society (KEPS)
Sam Jae Cho, Ryder Scott Company, chosj@blackmidas.com
Korean Computer Scientists & Engineers Association in America (KOCSEA)
Yoohwan Kim, University of Nevada, Las Vegas, yoohwan@cs.unlv.edu
Korean-American Offshore Engineers Association (KOEA)
Yong Lae Shim, ABS Technology, YShim@Eagle.org
Korean Life Scientists at UCSF (KOLIS)
Dae Hwi Park, University of California- San Francisco,
Daehwi.park@ucsf.edu
Korean Pathologists Association of North America (KOPANA)
Eun Young Lee, University of Kentucky , eylee@uky.edu
Korean Transportation Association in America (KOTAA)
Alex Hak-Chul Shin, Louisiana State University, shin@lsu.edu
Korean-American Society of Civil and Environmental Engineers (KSCEE)
Myong Ho Steve Ro, Lee & Ro, Inc., steve-ro@lee-ro.com
Korean-American Women in Science and Engineering (KWiSE)
Sanghee Yoo, Vertex Pharmaceuticals, sanghee_yoo@yahoo.com
NIH-Korean Scientists Association (NIH-KSA)
Jung Hyung Park , National Institutes of Health, parkhy@mail.nih.gov
New York Korean Biologists (NYKB)
Sae Woong Park, Weill Cornell, sap2015@med.cornell.edu
Research Triangle Park Bioscience and Biotechnology Meeting (RTP B&B)
Hangsik Moon, Syngenta Biotechnology, Inc., hangsik.moon@syngenta.com
San Diego Korean Biomedical Association (SDKoBA)
Jongdae Lee, UCSD, j142lee@gmail.com
The Society of Korean Statisticians in America (SKSA)
Sin-Ho Jung, Duke University, jung0005@mc.duke.edu
Ex-Presidents
Kiuck Lee, Marquette Univ., 312-787-7060, kiucklee@aol.com
Young Bae Kim, USC, 213-740-2311
Sang Il Choi, POSTECH, 919-357-7018, sangil@postech.ac.kr
Kwang Bang Woo, Yonsei Univ., 82-2-2123-3555, kbwoo@yonsei.ac.kr
Yong Nak Lee, HTRD, 847-577-5967,ynlee@htrdltd.com
Jae Young Park, NC State Univ., 919-848-6110, JAEYPARK30@aol.com
Chan-Mo Park, POSTECH, 82-11-521-8909, parkcm@postech.ac.kr
Dong Han Kim, POSTECH, 82-54-279-2101, dhkim@postech.edu
Ki-Hyon Kim, NC Central Univ., 919-530-6451, khk@nccu.edu
Kwang Kuk Koh, Chrysan Ind., kwang@chrysanindustries.com
Chin Ok Lee, Rockefeller Univ., 212-327-8617, leech@rockefeller.edu
Chai Chin Suh, 610-678-0534, chaisuh@gmail.com
Moo Young Han, Duke Univ., 919-660-2575, myhan@phy.duke.edu
Kun Sup Hyun, Polymer Processing Institute, kshyun@polymers-ppi.org
Hyo-Gun Kim, K-JIST, 703-663-8803, hkim@gist.ac.kr
Moon Won Suh, NC State Univ., 919-515-6580, moon_suh@ncsu.edu
Dewey Doo-Young Ryu, UC Davis, 530-752-8954, ddyryu@ucdavis.edu
Saeyoung Ahn, Fuzbien Tech. Institute, saeyounga@yahoo.com
Kyong Chul Chun, 301-598-3396, kcchun1@comcast.net
Ki Dong Lee, Univ. of Illinois, Urbana-Champaign, kdlee@uiuc.edu
Hong Taik (Thomas) Hahn, 310-825-2383, hahn@seas.ucla.edu
Howard Ho Chung, Argonne National Lab., chung.ksea@gmail.com
Nak Ho Sung, Tufts University, 617-627-3447, nsung@tufts.edu
Chan I. Chung, Rensselaer Polytechnic Institute, chungc@rpi.edu
Quiesup Kim, JPL/NASA, 818-354-8612, quiesup.kim@sbcglobal.net
Sung Won Lee, Univ. of Maryland, 301-405-1128, swlee@umd.edu
Sung K. Kang, IBM T.J. Watson Research Ctr., sungkang.ksea@gmail.com
Kang-Won Wayne Lee, Univ. of Rhode Island, kwaynel@gmail.com
Kang-Wook Lee, IBM T.J. Watson Research Ctr., 914-945-3070,
kangwook.lee.ibm@gmail.com
Chueng-Ryong Ji, North Carolina State Univ., chueng.ji@gmail.com
Jae Hoon Kim, The Boeing Company, 425-786-7723, jkim1@ieee.org
Ex-Presidents (Deceased)
Shoon Kyung Kim
Inyong Ham
Chong Wha Pyun
Hogil Kim
Je Hyun Kim
Kyungsik Kang
Soon Kyu Kim
Kwang-Hae (Kane) Kim
56
KSEA LETTERS Vol. 40 No. 3 April 2012

www.kofst.or.kr
KOFST will play a crucial role in leading
the science and technology renaissance of Korea
THE KOREAN FEDERATION OF SCIENCE AND TECHNOLOGY SOCIETIES
KOFST is firmly committed to enriching and supporting science and
technology societies; encouraging scientists to engage with society;
protecting the rights and interests of scientists;
and increasing public understanding of scientific discoveries
and theories to reap even greater benefits for Korea.