Preface - kmutt

KMUTT Annual Research Abstracts 2005
Faculty of Engineering
IC-001 THE CHARACTERISTICS OF THE
PRACTICAL BIPOLAR-OTA-BASED
FLOATING INDUCTOR
Rawid Banchuin, Roungsan Chaisricharoen,
Booncharoen Sirinaovakul, Boonruk Chipipop,
Satomi Ogawa, Kenzo Watanabe
The 20 th Commemorative International
Technical Conference on Circuits/Systems,
Computers and Communications (ITC-CSCC
2005), July 4-7, 2005, The Shilla Hotel, Jeju,
Korea, p. 1033
Commonly known, the gyrator-based
OTA simulated floating inductor can be divided
into two category; 4-OTA and 3-OTA structure.
Though these two structures perform exactly the
same ideal realization, their performances,
counting all practical aspects of an OTA, are still
suspicion. Therefore, embedded all practical
definitions of an OTA consisting of parasitic
elements, finite bandwidth effect, and noise; an
attempt to find differences between the 3-OTA
and 4-OTA based floating inductors have been
made. It turns out that the practical 4-OTAbased
floating inductor has better characteristics
than its 3-OTA counterpart with the parasitic
elements and finite bandwidth effect are
included. Furthermore, the noise performance of
the 4-OTA-based floating inductor is also better
than that of its 3-OTA counterpart. These results
lead to a guideline that an addition of one more
OTA to the often sited 3-OTA-based floating
inductor is worthy in an application which the
power consumption problem is not critical.
IC-002 THE ABSTRACT REPRESENTATION
FOR TONE MODELING
Santitham Prom-on, Bundit Thipakorn
The 2005 Electrical Engineering/Electronics,
Computer, Telecommunications, and
Information Technology International
Conference (ECTI-CON 2005), May 12-13,
2005, Asia Pattaya Beach Hotel, Pattaya,
Cholburi, Thailand
79
This paper proposes the framework for
tone modeling based on the abstract
representation and reports on the application of
the abstract representation to Thai tones. The
tone modeling framework separates the abstract
representation of tones which is the languagelevel
information out of the physical-level
model. The abstract representation may be in the
form of constant, linear, or abruptly change in
slope signals. The synthesis experiment is
conducted to confirm the existence of such
abstract representation and based on the
assumption that only the abstract tone is
necessary to identify the tone. The experimental
results show that the abstract representation can
successfully represent Thai tones with the
recognition rate of 89.91%. We will further
explore the physical-level models in the future
works.
IC-003 OF COLLABORATIVE LEARNING :
AN APPROACH FOR EMERGENT
LEADERSHIP ROLES IDENTIFICATION
Punnarumol Temdee, Bundit Thipakorn,
Booncharoen Sirinaovakul, Heidi Schelhowe
IADIS International Conference on Cognition
and Exploratory Learning in Digital Age
(CELDA 2005), December 14-16, 2005, Porto,
Portugal, p. 513
During the interaction of a collaborative
learning team, students usually participate in a
variety of roles such as leader, follower and
isolator, etc. These roles should be recognized
and monitored carefully, especially the team
leader, so that the collaboration might be
engineered and supported appropriately.
Identifying emergent leadership roles in a
collaborative learning team is challenging
because the roles are normally distributed and
shifted among team members over time. In this
paper, the emergent leadership role is the most
prominent member from different points of
social network views including: having the most
expert power in the team so that the good
respond from team members can be expected,
locating relatively close to every team member
so that the control message will be reached all
members quickly when necessary and bridging
between any pairs of team members so that the
chance of having new connections of new pairs
can be highly obtained. Therefore, the leadership
index is proposed here as the combination of
degree of centrality, closeness and betweenness.
The communication patterns from the pilot study
are examined and the result shows that the
leadership index is sufficient enough to
distinguish the leader from team members.
IC-004 DISTINGUISHING EXCITEMENT
International Conference