Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673346
W. Lu, R. Mauriello, K. Sundaram, L. Chow
Over the last several years power MOSFET's have stimulated some very interesting research, particularly applied to cryogenic conditions. This research was developed to study the effects of the power MOSFET's ability to turn on and turn off at varying frequencies and compare the results at room temperature and at liquid nitrogen temperature. The present work will demonstrate that by exposing the device to liquid nitrogen temperature, the overall time response is greatly enhanced.
{"title":"Switching characteristics of a power MOSFET with varying temperature","authors":"W. Lu, R. Mauriello, K. Sundaram, L. Chow","doi":"10.1109/SECON.1998.673346","DOIUrl":"https://doi.org/10.1109/SECON.1998.673346","url":null,"abstract":"Over the last several years power MOSFET's have stimulated some very interesting research, particularly applied to cryogenic conditions. This research was developed to study the effects of the power MOSFET's ability to turn on and turn off at varying frequencies and compare the results at room temperature and at liquid nitrogen temperature. The present work will demonstrate that by exposing the device to liquid nitrogen temperature, the overall time response is greatly enhanced.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134021168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673336
P. A. Thomas, S.M. Nabritt, M.A. Belkerdid
Various propagation models exist in the open literature. These models are basically divided into two distinct classes namely deterministic and stochastic. The deterministic model corresponds to a deterministic description of the environment that causes path loss and multipath effects, and it is very useful when multipath is caused by a small number of paths that can be accurately characterized. The stochastic model corresponds to a statistical model of the environment and it is most appropriate when the multipath effects are caused by a large number of paths between transmitter and receiver that would be impossible to characterize in a deterministic way. This paper deals with various propagation models and studies their application to wireless communications system design. The advantages and disadvantages of each model is given where applicable. An overview of the circumstances governing propagation prediction modelling is presented in light of path loss and multipath effects.
{"title":"Propagation models used in wireless communications system design","authors":"P. A. Thomas, S.M. Nabritt, M.A. Belkerdid","doi":"10.1109/SECON.1998.673336","DOIUrl":"https://doi.org/10.1109/SECON.1998.673336","url":null,"abstract":"Various propagation models exist in the open literature. These models are basically divided into two distinct classes namely deterministic and stochastic. The deterministic model corresponds to a deterministic description of the environment that causes path loss and multipath effects, and it is very useful when multipath is caused by a small number of paths that can be accurately characterized. The stochastic model corresponds to a statistical model of the environment and it is most appropriate when the multipath effects are caused by a large number of paths between transmitter and receiver that would be impossible to characterize in a deterministic way. This paper deals with various propagation models and studies their application to wireless communications system design. The advantages and disadvantages of each model is given where applicable. An overview of the circumstances governing propagation prediction modelling is presented in light of path loss and multipath effects.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125689851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673287
T. Uzelac, M. Kovač
This paper describes an efficient software implementation of an MPEG audio layer 3 decoder. Algorithmic refinements required to efficiently perform the large amount of digital signal processing operations on a general purpose processor are described, along with optimizations specific to execution on the Intel Pentium processor. To demonstrate the quality of our approach we present a benchmark against other known programs.
{"title":"A fast MPEG audio layer III software decoder","authors":"T. Uzelac, M. Kovač","doi":"10.1109/SECON.1998.673287","DOIUrl":"https://doi.org/10.1109/SECON.1998.673287","url":null,"abstract":"This paper describes an efficient software implementation of an MPEG audio layer 3 decoder. Algorithmic refinements required to efficiently perform the large amount of digital signal processing operations on a general purpose processor are described, along with optimizations specific to execution on the Intel Pentium processor. To demonstrate the quality of our approach we present a benchmark against other known programs.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125778975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673329
Francisco de Asis Carreras, A. Snider
This paper describes some features of an interactive educational tool developed for teaching complex analysis for engineering students. It focuses on the graphic representation of the operations of complex arithmetic and the images of complex domains under analytic function. Emphasizing the visualization of such topics, it is intended for use in a graduate engineering analysis course to provide students with a better understanding and professors with a more stimulating lecture tool. Additionally it can be of assistance in engineering design in areas where conformal mapping is a useful tool (such as airfoils or waveguides). Matlab was the software chosen because it is well known to researchers, professors and engineering students.
{"title":"A Matlab educational software tool for teaching complex analysis in engineering","authors":"Francisco de Asis Carreras, A. Snider","doi":"10.1109/SECON.1998.673329","DOIUrl":"https://doi.org/10.1109/SECON.1998.673329","url":null,"abstract":"This paper describes some features of an interactive educational tool developed for teaching complex analysis for engineering students. It focuses on the graphic representation of the operations of complex arithmetic and the images of complex domains under analytic function. Emphasizing the visualization of such topics, it is intended for use in a graduate engineering analysis course to provide students with a better understanding and professors with a more stimulating lecture tool. Additionally it can be of assistance in engineering design in areas where conformal mapping is a useful tool (such as airfoils or waveguides). Matlab was the software chosen because it is well known to researchers, professors and engineering students.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126093621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673328
C. N. Obiozor, S. Phlong
An electromagnetic suspension system is used to demonstrate some concepts in electromagnetics, electronics and control. This educational approach combines classroom theories with practice.
电磁悬架系统用于演示电磁学、电子学和控制中的一些概念。这种教育方法将课堂理论与实践相结合。
{"title":"Electromagnetic suspension system","authors":"C. N. Obiozor, S. Phlong","doi":"10.1109/SECON.1998.673328","DOIUrl":"https://doi.org/10.1109/SECON.1998.673328","url":null,"abstract":"An electromagnetic suspension system is used to demonstrate some concepts in electromagnetics, electronics and control. This educational approach combines classroom theories with practice.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126335783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673283
Ok-Hyeon Kim, A. Poularikas
A method is proposed to find the power spectrum of signals with missing observations. The missing observations were first found by the linear prediction method and then an AR model was assumed and the Burg algorithm was used to estimate the spectrum for each segment of the signal. The coefficients found by Burg's method were updated every time the next value of the missing signal was predicted. After the missing observations were found then the power spectra were estimated using the following three different approaches: (a) averaging in the time domain, (b) averaging the spectra of each segment, and (c) averaging the coefficients of the AR model.
{"title":"Spectral estimation of segmented signals with extrapolation","authors":"Ok-Hyeon Kim, A. Poularikas","doi":"10.1109/SECON.1998.673283","DOIUrl":"https://doi.org/10.1109/SECON.1998.673283","url":null,"abstract":"A method is proposed to find the power spectrum of signals with missing observations. The missing observations were first found by the linear prediction method and then an AR model was assumed and the Burg algorithm was used to estimate the spectrum for each segment of the signal. The coefficients found by Burg's method were updated every time the next value of the missing signal was predicted. After the missing observations were found then the power spectra were estimated using the following three different approaches: (a) averaging in the time domain, (b) averaging the spectra of each segment, and (c) averaging the coefficients of the AR model.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125904557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673331
A. Aguilar, R. Eaglin, A. Mehdi, I. Batarseh
In this paper, through two different teaching experiences, the role of the Internet in delivering effective educational opportunities is discussed. Due to the unprecedented technological advancements in recent years, the role of computer technology in offering distributed courses has changed forever. Two recent experiments were carried out by the College of Engineering at the University of Central Florida (UCF), USA. One engineering course was taught at UCF while one of the authors (course instructor) was on a Fulbright scholarship visit at the Princess Sumaya University College for Technology (PSUCT) in Jordan. The second engineering course was taught at PSUCT with the instructor at UCF.
{"title":"Distributed engineering courses with on-line components","authors":"A. Aguilar, R. Eaglin, A. Mehdi, I. Batarseh","doi":"10.1109/SECON.1998.673331","DOIUrl":"https://doi.org/10.1109/SECON.1998.673331","url":null,"abstract":"In this paper, through two different teaching experiences, the role of the Internet in delivering effective educational opportunities is discussed. Due to the unprecedented technological advancements in recent years, the role of computer technology in offering distributed courses has changed forever. Two recent experiments were carried out by the College of Engineering at the University of Central Florida (UCF), USA. One engineering course was taught at UCF while one of the authors (course instructor) was on a Fulbright scholarship visit at the Princess Sumaya University College for Technology (PSUCT) in Jordan. The second engineering course was taught at PSUCT with the instructor at UCF.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115807235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673334
M. Abdallah
A neuro hierarchial approach based on an adaptive back-propagation algorithm is proposed. In a separate preprocessing step, the input and the output vector are generated using the encoded-sequence representation. The algorithm is applied to translate the American sign language from spoken words. Experimental results indicate that this approach results in fast convergence, stable learning and a relatively small network size when compared to traditional methods.
{"title":"A neuro-hierarchial multilayer network in the translation of the American sign language","authors":"M. Abdallah","doi":"10.1109/SECON.1998.673334","DOIUrl":"https://doi.org/10.1109/SECON.1998.673334","url":null,"abstract":"A neuro hierarchial approach based on an adaptive back-propagation algorithm is proposed. In a separate preprocessing step, the input and the output vector are generated using the encoded-sequence representation. The algorithm is applied to translate the American sign language from spoken words. Experimental results indicate that this approach results in fast convergence, stable learning and a relatively small network size when compared to traditional methods.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133346692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673300
F. Hamzaoglu, E. Makram
This paper introduces a method to find the location and the size of series capacitors to maximize the diagonal terms of the Jacobian submatrix. The obtained results are based on a newly defined d(/spl part/Q/sub i///spl part/V/sub i/)/dK/sub s/ criterion for voltage stability. The continuation method is used to update the bus voltage magnitudes and angles using the developed dV/dK/sub s/ and d/spl delta//dK/sub s/ parameters, respectively.
{"title":"Optimal location of series capacitor for voltage instability problems","authors":"F. Hamzaoglu, E. Makram","doi":"10.1109/SECON.1998.673300","DOIUrl":"https://doi.org/10.1109/SECON.1998.673300","url":null,"abstract":"This paper introduces a method to find the location and the size of series capacitors to maximize the diagonal terms of the Jacobian submatrix. The obtained results are based on a newly defined d(/spl part/Q/sub i///spl part/V/sub i/)/dK/sub s/ criterion for voltage stability. The continuation method is used to update the bus voltage magnitudes and angles using the developed dV/dK/sub s/ and d/spl delta//dK/sub s/ parameters, respectively.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134365009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673365
P. Phothimat, M. Awipi
Transistor characteristics are modified by the application of high magnetic fields. These changes are due to Hall effect voltages or magnetoresistance. Translations of device characteristics can be modeled by connecting voltage or current sources in series/parallel with the device. These translations are similar to the effect of ionizing radiation creating a plasma column in the device. This results in deterioration of device performance due to lowered noise margins in digital circuits. Because of the similarities of these effects, the magnetic field can, with some advantages, replace ionizing radiation in simulating single event upset (SEU) testing.
{"title":"Effect of high magnetic field on transistor characteristics with applications to SEU testing","authors":"P. Phothimat, M. Awipi","doi":"10.1109/SECON.1998.673365","DOIUrl":"https://doi.org/10.1109/SECON.1998.673365","url":null,"abstract":"Transistor characteristics are modified by the application of high magnetic fields. These changes are due to Hall effect voltages or magnetoresistance. Translations of device characteristics can be modeled by connecting voltage or current sources in series/parallel with the device. These translations are similar to the effect of ionizing radiation creating a plasma column in the device. This results in deterioration of device performance due to lowered noise margins in digital circuits. Because of the similarities of these effects, the magnetic field can, with some advantages, replace ionizing radiation in simulating single event upset (SEU) testing.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129987269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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