Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)最新文献

{"title":"A neural network approach to system performance analysis","authors":"R. Gruen, T. Kubota","doi":"10.1109/SECON.2002.995618","DOIUrl":"https://doi.org/10.1109/SECON.2002.995618","url":null,"abstract":"Neural networks are used in a wide variety of situations to solve complex problems. Some of the categories for which neural networks are used include: prediction software, classification algorithms, data association environments, data conceptualization environments, and data filtering problems. This work described in this paper implements a neural network that spans both the prediction and data association problems. The neural network approach to system performance analysis takes performance data from computer systems and uses a Kohonen based neural network to analyze the performance data and attempts to find bottlenecks in the computer system. The data performance analysis results are present as line graphs that can be interpreted by computer experts to determine bottlenecks within the computer system, and can intelligently suggest upgrades to improve any subsystem that suffers from poor performance. The aim of this work is to provide a \"proof of concept\" for use in IT assessments, but can also be applied to any situation involving computer performance analysis.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115721242","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}

{"title":"Development of software for mobile robot control over a radio frequency communications link","authors":"M. Lister, J. Wunderlich","doi":"10.1109/SECON.2002.995630","DOIUrl":"https://doi.org/10.1109/SECON.2002.995630","url":null,"abstract":"In the spring of 2001, work began on a mobile robot for an advanced computer engineering class. One of the key parts to the success of this robot would be the ability to control it from a computer terminal. In order to make this feasible, the computer would communicate to the robot through a wireless connection. The robot's on-board computer would perform any computations needed, so the robot would not need to send any information on the controlling computer. The communication link was designated to be one way, from the computer to the robot. For reasons including cost efficiency, ease of use, and range, RF communication was chosen. Using two development boards from Linx Technologies, we had the capability of communicating through the computer's serial port. The boards boasted a line of sight range of about 1000 feet. The board acts as nothing more then a transmitter and receiver, so any error correction must be dealt with in the software. Often errors come from interference created by surrounding RF devices, and appear as incorrect bits in the data stream. In order to handle such errors, methods involving redundancy were used. When the stream of information is sent, it is initialized by a start byte. This is followed by the commands, each of which is repeated three times followed by a stop byte. On the receiving end, the software waits for the start byte and then stores each byte that follows. They are then compared with one another and determined to be either clean data or an error. If the data is clean, the robot then executes the commands. By monitoring the data received by the receiver we were able to see the need for such software. Upon powering up the board, miscellaneous bits are received, and if there is no error correction, the robot could misinterpret these for a command. The boards also received stray bytes while idle, so the software would also eliminate this. Software development was started and initially tested over a crossover cable connecting the two serial ports. This allowed us to ensure that the software was working with out seeing any errors at first. Finally the software was used with the RF boards and seen to be functional. This paper explores, in depth, the methods used by software to correct errors that may develop in RF communication. The materials used are discussed in greater detail along with the creation of the software. Experimental results show the methods to be precise, and fit the design application needs.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132424966","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}

{"title":"Estimation of gaseous absorption using surface and radiosonde meteorological measurements","authors":"R. Pollard, H. Helmken","doi":"10.1109/SECON.2002.995601","DOIUrl":"https://doi.org/10.1109/SECON.2002.995601","url":null,"abstract":"For radiowave propagation on Earth-space communication links at high frequencies such as Ka-band, the effect of atmospheric gaseous absorption mainly due to oxygen and water vapor is the primary cause of attenuation. This paper examines the applicability of the surface based Crane's model currently employed by the Advanced Communications Technology Satellite (ACTS) propagation experiment for estimation of attenuation due to atmospheric gaseous absorption (AGA), developed for Oklahoma, to sub-tropical climate regions such as Florida. The millimeter-wave propagation model (MPM) is used as a basis of comparison since it uses the direct atmospheric measurements (temperature, relative humidity, and pressure) made at different levels of the atmosphere with radiosonde instrumentation. The AGA was individually examined for oxygen and water vapor. Finally, accuracy of the Crane's model was verified by computing the attenuation results using real acquired data for both models and comparing their results. A MATLAB based graphical user interface (GUI) was developed and utilized to provide a user friendly environment for visualization purposes and ease of data analysis.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"21 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131758738","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}

{"title":"Performance evaluation of Gaussian radial basis function network classifiers","authors":"R. Li, G. Lebby, S. Baghavan","doi":"10.1109/SECON.2002.995619","DOIUrl":"https://doi.org/10.1109/SECON.2002.995619","url":null,"abstract":"There are various neural network techniques for pattern recognition and machine intelligence. Radial basis function network has been shown as an important alternative to the conventional backpropagation approach in neural network design. A procedure to optimize the design parameters of the radial basis function classifier is described. We evaluate results of the standard radial basis function classifier, its optimized version and the backpropagation classifier in terms of the training speed and classifier accuracy. An artificial two-dimensional data set is created for our study.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"76 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132720508","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}

{"title":"Data encryption performance and evaluation schemes","authors":"S. Wunnava, E. Rassi","doi":"10.1109/SECON.2002.995593","DOIUrl":"https://doi.org/10.1109/SECON.2002.995593","url":null,"abstract":"With the explosion in Internet-based electronic commerce, there is an increasing need to secure data and commercial transactions. While there are several encryption methodologies, such as the DES (Data Encryption Standard) and the RSA (Rivest, Shamir, Adleman) algorithm, there is a continuous need to develop other algorithms, especially taking into consideration the recent advances in hardware and storage technologies and software distributed computing capabilities. The purpose of this paper is to present the results of investigations conducted by the authors regarding the emerging data security methodologies. Emphasis is placed on the applicability of these algorithms in the academic, industrial and commercial environments. Of the several methodologies considered for the AES (Advanced Encryption Standard), MARS (Multivariate Adaptive Regression Splines) has become one of the front-running and adaptable methodologies for data security over global networks. Initiated by NIST (National Institute of Standards), the MARS cipher was developed by IBM as an alternative to the existing DES methodology; MARS is expected to be more secure.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"152 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133157127","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}

{"title":"Web based interactive education and learning scheme (WBIEL)","authors":"S. Wunnava, Neelima Boppana, A. Saka, Bhargavi Kodiparthy","doi":"10.1109/SECON.2002.995574","DOIUrl":"https://doi.org/10.1109/SECON.2002.995574","url":null,"abstract":"With information technology ever growing, there has been an upsurge in the higher level technical and engineering education. In addition, several companies continuously upgrade their hardware and software products and the associated engineers, programmers, and scientists need to be retrained on a regular basis. This leads to an ever growing requirement for a continuous education and learning scheme. This scheme can be applicable not only in colleges and universities, but also in industry and government organizations. The authors have been conducting investigations into Web based education applicable in the academic and industrial environment. While the web based education concept has been practiced for quite some time, the interactivity between the end users and the web host is very limited, especially if there are multiple client students at different sites. One possible and cost effective solution would be to send an email or chat message to the web host and convert that into a voice message to the person acting as the web host. The team has chosen some of the popular engineering modules such as C, C++, Java, VHDL and Matlab to be candidates for the web based voice interactive system model development. In this article, the authors present the system architecture, the implementation scheme, and the results of the (WBIEL).","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122018033","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}

{"title":"Characterizing sensitive CMOS radiation detector","authors":"H. Javan","doi":"10.1109/SECON.2002.995551","DOIUrl":"https://doi.org/10.1109/SECON.2002.995551","url":null,"abstract":"Semiconductor sensors cover a wide range of the electromagnetic spectrum for detecting nuclear-particle radiation. The most important properties of these detectors are their sensitivity i.e. their ability to low level radiation, charge transport, efficiency (electron-hole pair creation), and their response time. This article addresses the sensitivity of these devices. The following methods can increase the sensitivity of any electronic sensors: 1. Proper selection of the material with respect to the desired radiation detection, i.e matching the energy gap of the device, E/sub g/, to the energy of incoming radiation. 2. Application of proper process technology, such as CMOS, BiCMOS, etc. 3. Fabrication technology i.e. using proper doping, substrate, etc. 4. Finally the design of the external circuitry. This paper reports the investigation of the circuitry of a newly developed CMOS a particle radiation detector and characterization of its sensitivity. We also discuss the the effect of external power supply connection on the sensitivity, the derivation of the analytical expression for the sensitivity and we compare the theoretical prediction with the experimental values. In addition, the effect of radiation on the threshold voltage is discussed as well as an increase in sensitivity due to radiation. Finally, a method is suggested to obtain an optimum performance.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116465358","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}

{"title":"Wireless modem synchronization using an external reference","authors":"G. Ragsdale, T. Warnagiris, D. Koch","doi":"10.1109/SECON.2002.995614","DOIUrl":"https://doi.org/10.1109/SECON.2002.995614","url":null,"abstract":"This paper discusses a communications system design for wireless modems incorporating an external reference for carrier synchronization. Motivation and a performance analysis in the presence of noise are given. Simulation results and initial field trial experiences are presented.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128340609","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}

{"title":"Performance evaluation of multithreading in concurrent programs","authors":"Chanki Jeong, M. M. Shahsavari","doi":"10.1109/SECON.2002.995546","DOIUrl":"https://doi.org/10.1109/SECON.2002.995546","url":null,"abstract":"Concurrent programming may allow the programmer to create fast responsive systems without the cost overhead of full parallelism. One method of achieving concurrency is to use multiple threads of execution in a single address space. By declaring many threads within the confines of a single process, a programmer can achieve potential parallelism at low overhead. Can concurrent implementation always outperform sequential implementation on a uniprocessor? This project involves both sequentially and concurrently implementing a sort algorithm, called Bucket Sort. The core research aims to investigate the performance factors by several variations of the number of threads and problem size. Experimental results are presented on both implementations, and the design considerations of concurrent programming are also studied.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125749427","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}

{"title":"Mapping the effect of a circuit impedance on the common-mode excitation of electromagnetic interference","authors":"T. Jerse","doi":"10.1109/SECON.2002.995567","DOIUrl":"https://doi.org/10.1109/SECON.2002.995567","url":null,"abstract":"The control of electromagnetic radiation from electronic products in order to comply with the various governmental standards regulating electromagnetic interference around the world is a challenging part of the product design process. A principal reason is the relative difficulty of accurately modeling the way the common-mode portion of the radiation is produced. In Jerse (1999) a common-mode impedance measured at the driving point of a circuit was derived along with a numerical method to compute it. This impedance can be used as a single figure-of-merit to assess the proclivity of a configuration to generate common-mode emissions. As a result, design tradeoffs can be made without performing extensive full-wave analyses and decomposing the derived currents into their modal components. The work described in this paper extends the technique to permit the inclusion of a variable external circuit element and takes advantage of this single figure-of-merit to gauge the effect of the impedance of a transmission line load on the common-mode excitation of an example circuit.","PeriodicalId":228265,"journal":{"name":"Proceedings IEEE SoutheastCon 2002 (Cat. No.02CH37283)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123038310","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}