Journal of Emerging Technologies in Web Intelligence Contents

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130 JOURNAL OF EMERGING TECHNOLOGIES IN WEB INTELLIGENCE, VOL. 2, NO. 2, MAY 2010Thus overall, the performance of the Hard-decisionViterbi decoder falls with the increase in bit error ratesand good level of error correction is available up to 5 biterrors per frame above which the message keeps gettingdeteriorated. This is indicated in the figure .11%Bit error correction120100806040200Bit Error Correction Rate1 2 3 4 5 6 7 8 9No of Bit errors/frameFigure 11. Analysis graphXI. CONCLUSIONThus the software based multi channel FM receptionoffers the capability to receive from one up to four FMstations at the same time. One station is streamed live tothe speakers while the rest are stored in the disk in rawformat. This offers the ability to listen to the recordeddata at a later time thereby preventing the user frommissing out on some important information.Working with the FM band of the radio spectrum is theentrance to the Software based radio world which iscapable of handling many parts of the radio spectrum.This project provided a good practical exposure to theproblems involved in replacing a conventional radio withsoftware based one and demonstrated the power andflexibility offered by using software in place ofconventional hardware.This project just touches the tip of the iceberg in theworld of software defined radio, which has tremendouspotential to be unleashed. With the aid of technologyadvancement, the software based radios will be able toexplore the full radio spectrum very soon into the future.With the move towards processing signal systems indigital format comes the problem of error detection andcorrection. Thankfully, this has been taken care bynumerous error detection and correction algorithms,which were proposed long back, but were notimplemented due to large computation requirements.The convolution encoder and the Viterbi decoderimplemented in this project offer a reasonable amount oferror correction capability to a message signal.These algorithms are the basic error correctionalgorithms on which many other complex error correctionalgorithms are built upon.REFERENCES[1] John G Proakis, Dimitris G Manolakis, “DigitalSignal Processing: Principles, Algorithms andApplications”, 1996, Prentice Hall, ISBN: 0-13-373762-4[2] Todd K. Moon, “Error correction coding:Mathematical methods and algorithms”,2002, JohnWiley and sons, ISBN: 0-471-64800-0Shriram K. Vasudevan was born at TamilNadu on 29-07-1983. He holds an M.Tech in Embedded Systems and B.E., inElectronics and Instrumentation. He has done his B.E., fromAnnamalai University, Chidambaram, India. He proceeded withhis M.Tech at TIFAC-CORE of SASTRA University, Tanjore,India.He has got overall 4 years of industrial experience in thefield of Embedded Systems and Optical Networking. Currentlyhe is holding the responsibility of Assistant Professor in thefield of Embedded Systems in VIT University, Vellore, India.He was employed with Wipro Technologies for 2 years. He hasvisited USA, Dallas for his telecom training.He has presented papers in National and Internationalconferences in the areas of VLSI, Embedded and Networking.His research area focuses on Embedded Networking.Siva Janakiraman was born at TamilNadu on 05-06-1982.He holds an M.Tech in Embedded Systems and B.E., inElectronics and Communication. He has done his B.E., fromSASTRA University, Tanjore, India. He proceeded with hisM.Tech at SASTRA University, Tanjore, India. He has gotoverall 5 years of teaching experience in the field of EmbeddedSystems. Currently he is holding the responsibility of AssistantProfessor in the school of Electrical and ElectronicsEngineering in SASTRA University, Tanjore, India. Hisresearch area focuses on Embedded Systems and Cryptography.Subashri Vasudevan, born at TamilNadu on 21-01-1989.She is currently doing her B.Tech and she is in her final year ofher studies. She is graduating at SASTRA University. She hasbeen consistently working on many projects and she is one ofthe few toppers in her department. She is currently doing projecton Software Radio.She has presented papers in the area of Software Radio andWireless communications. Her research interest includesWireless communications and Embedded Systems.ACKNOWLEGDEMENTWe wish to thank all the co authors who supported thisproject for its success.© 2010 ACADEMY PUBLISHER
JOURNAL OF EMERGING TECHNOLOGIES IN WEB INTELLIGENCE, VOL. 2, NO. 2, MAY 2010 131Webinar – Education through DigitalCollaborationAnuradha VermaInfosys Technologies Ltd, Chandigarh, IndiaEmail: anuradha_thakur@infosys.comAnoop SinghInfosys Technologies Ltd, Bangalore, IndiaEmail: anoop_singh@infosys.comAbstract—Transition in the learning habits and trends ofstudents is evident from the traditional text based to thecurrent dynamic modes like world-wide web, CAI andsimulation. Webinar as a learning technology offers aplatform to overcome the gap in this digital divide and helpthe students get acquainted with the latest. A case describingthe use of webinar by Infosys helps the reader comprehendthe digital collaboration webinar offers discussing itsshortcomings and benefits.Index Terms—webinar; learning habits, teachingmethodologyI. LEARNING TECHNOLOGIESAs per Gretchen Rhines Cheney et al. (2005) [1] Indiahas the second largest education system in the world,falling only behind China. University EducationCommission (UGC) [2] set up in 1948 provides guidelinesfor coordination, determination and maintenance ofstandards of university education in India. Studying thevast historical background of education in India, it can beseen that though the Indian education system is powerful,yet it needs to dynamically revamp various facets toemerge strong in today’s ever changing scenario.In today’s fast pace world students are well informedand require a facilitator rather than an instructor. Theyhave islands of information available but do not have thepatience to understand its use or consult their faculty. Thelearning technologies have also seen a change in thelearning habits of students from the past to the recenttimes. The current day students are well versed with themodern technologies and are avid internet userscompared to their predecessors who were morecomfortable in a text based instruction based approach.However in the current education system, there exists adigital divide – a gap in the content and method ofknowledge dissipation and what value it offers to itsstudents in today’s ever changing world of technologycollaboration. Studying the trends in the past, a shift canbe ascertained in learning habits of students from thetraditional method of lecture based to the interactive anddescriptive based on World Wide Web (WWW) orinternet, e-mentoring, etc.This paper talks about the shift in the learning habitsand technologies and the impact webinar can play as alearning technology taking a case study from CampusConnect team of Infosys Technologies Ltd.II. CHANGE IN LEARNING HABITS FROM TRADITIONALTO TECHNOLOGY BASEDTill late, the teaching methodology used in most of theeducational institutes in India was following thetraditional method of chalk and talk but in recent timesthis has seen a paradigm shift.A. Traditional MethodologyKey features of the traditional teaching methodologycan be collated as under:• One way communication without any interaction• No openness between the faculty and students asa forum to exchange ideas• Less focus on analytical skills and more onmemory based.• Only lecture based class room approachfollowed for knowledge deliveryThis approach faced a lot of challenges, some being:• Lack of Flexibility – the students were notoffered any flexibility in terms of their learningstyles and habits or of implementing theirlearning. There was a fixed approach beingfollowed.• Less or no access to Information - Improvingaccess of information to the students is difficultas there is was no mode for information sharing.• No Standardization – Quality check at all levelsof education was absent offering nostandardisation.B. Scientific MethodologyThe advent of multi-media revolutionised trainingtechniques and brought in greater diversity andinteraction. The black boards have been replaced by LCDscreens. Some of the ingenious methods using scientificor technology base are:© 2010 ACADEMY PUBLISHERdoi:10.4304/jetwi.2.2.131-136
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