{"title":"The use of sidewalls on an image plane to reduce the radiated emissions from an electric line source","authors":"T.A. Jerse","doi":"10.1109/SECON.1996.510159","DOIUrl":"https://doi.org/10.1109/SECON.1996.510159","url":null,"abstract":"The radiated emissions produced by electronic circuits are often reduced by placing pieces of metal in the vicinity of the current paths. Even when the metal does not carry return current directly, the conductive surface serves as an image plane which has been proven successful in mitigating common-mode emissions. Previous studies showed that a finite-width plane effectively reduces radiated emissions as long as the current source is not placed too close to an edge of the plane. This parametric study characterizes the effect of adding short vertical sidewalls at the edges of the plane to create a trough structure. The work quantifies the influence exerted by a small metal fence at the edge of an image plane on the emissions from a line source routed near an edge. The study is of interest to PCBs and off-board cables.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133568192","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":"A comparison of time- and frequency-domain wireless channel sounding techniques","authors":"Paul G. Flikkema, S. G. Johnson","doi":"10.1109/SECON.1996.510118","DOIUrl":"https://doi.org/10.1109/SECON.1996.510118","url":null,"abstract":"Modeling the wireless channel involves using a known probing signal to estimate channel parameters such as multipath attenuation and arrival times. A general form for the probing signal is introduced for channel sounding. Four specific techniques are described and their accuracy in measuring the channel impulse response is compared. The time domain techniques are the sliding correlator method and the direct pulse technique. The frequency domain techniques described are the single tone method and the frequency modulated continuous wave (FMCW) radar technique.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114987249","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":"Electric wheelchair propulsion by induction motors","authors":"H.W.V. Chew, R. Inigo","doi":"10.1109/SECON.1996.510022","DOIUrl":"https://doi.org/10.1109/SECON.1996.510022","url":null,"abstract":"This paper presents the design and implementation of a practical variable frequency induction motor propulsion system for electric wheelchairs. The power source is a 24 volt battery which is converted to three phase variable frequency voltage by means of a microcomputer controlled inverter. The frequency can be varied between 10 and 80 Hz, adequate for the speeds required in this type of system. The system was first tested in an open loop configuration. Then, a closed loop system was implemented in which the output and reference speed were compared for different load situations, and the error in speed was minimized by adjusting the frequency.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"53 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120882629","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":"Multi-lingual character recognition using artificial neural networks","authors":"S. Meiyappan, S. Sridharan, E. Ososanya","doi":"10.1109/SECON.1996.510102","DOIUrl":"https://doi.org/10.1109/SECON.1996.510102","url":null,"abstract":"Character recognition is one famous problem that artificial neural networks have been applied to deal with. But, recognizing characters from multiple languages is relatively new and needs to be investigated in depth. This paper describes one such implementation. An artificial neural network was designed to recognize a bilingual character set of Tamil and English, even in a noisy environment. The system was designed, implemented, trained and tested and was found to exhibit an accuracy of 93% on noisy characters.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123446362","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":"An indexed access mechanism for wireless networks","authors":"E.G. Barrantes-Sliesarieva, M. Ilyas","doi":"10.1109/SECON.1996.510116","DOIUrl":"https://doi.org/10.1109/SECON.1996.510116","url":null,"abstract":"The wireless communications industry has experienced some radical changes due to increased demand for wireless communications that can no longer be met with present technologies. One example of such networks is a cellular wireless network. This paper describes a new medium access mechanism-indexed RAMA (resource auction multiple access) or I-RAMA for wireless networks. This access mechanism is basically an extension of the RAMA protocol. The main objective of I-RAMA is to reduce the amount of overhead and wastage of resources associated with the resource auction in RAMA. I-RAMA uses variable length resource auctions (as opposed to the fixed length auctions in RAMA) and the length of the auction depends on the time it takes the base station to uniquely identify a mobile station. The evaluation of I-RAMA is performed by using simulation. The results show that I-RAMA consistently performs better than RAMA in terms of overhead, discarding probability, and average access delay.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"24 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121013960","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":"Device performance characterization and modeling of recombination current in CdTe/CdS pn junction diodes","authors":"D. Oman, C. Ferekides, D. Morel","doi":"10.1109/SECON.1996.510103","DOIUrl":"https://doi.org/10.1109/SECON.1996.510103","url":null,"abstract":"A comprehensive model of pn junction diode behaviour based on Shockley-Read-Hall (SRH) recombination theory is presented and been successfully applied to a large number CdTe photovoltaic cells in the 10%-15% efficiency range. The model accounts for the range of measured values of diode quality factor and reverse saturation current found in our devices as well as an observed relationship between these parameters.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124652019","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":"Induced currents on slotted bodies of revolution under plane wave illumination","authors":"J. P. Donohoe, M. Ho, C. Taylor","doi":"10.1109/SECON.1996.510147","DOIUrl":"https://doi.org/10.1109/SECON.1996.510147","url":null,"abstract":"In order to develop a basic understanding of the interaction of an ultra-wideband electromagnetic pulse with a conducting body of revolution (BOR), one must accurately compute the resulting induced currents. The general problem considered here is the computation of the induced currents on a conducting BOR which contains an aperture on one end and an electrically thin circumferential slot of variable conductivity. The specific geometry of interest is a simplified missile structure. The incident electromagnetic wave is assumed to be a temporally-impulsive plane wave which is transverse magnetic (TM) to the BOR axis. The axial aperture electric field impulse response is given for several angles of incidence. The dominant resonances in the aperture electric field are noted and the currents which produces these resonances are shown for various slot conductivities. The variation of the aperture electric field is also shown at the dominant resonances as a function of conductivity.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114543202","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":"Weighted information flow","authors":"S. Nemecek","doi":"10.1109/SECON.1996.510162","DOIUrl":"https://doi.org/10.1109/SECON.1996.510162","url":null,"abstract":"Information flow is a software metric designed to quantify the complexity of programs. A modification of information flow, weighted information flow assigns different values to the several types of program flows. Weighted information flow reduces the determination of information flows to a simple classification and, subsequently, of program complexity to simple counting.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123060240","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":"Distributed arithmetic based recursive digital filter designs for high throughput applications","authors":"Ching-Long Sue, Y. Hwang","doi":"10.1109/SECON.1996.510110","DOIUrl":"https://doi.org/10.1109/SECON.1996.510110","url":null,"abstract":"The design problem of high speed recursive digital filters, particularly for real time applications, is addressed in this paper. Recursive digital filters have been widely used in many important applications. These include the cases such as AR filters, Kalman filters and adaptive filters. Recursive filters are sequential in nature, which often becomes the performance bottleneck in real time applications. Conventional speed up techniques such as pipelining and parallel processing are not directly applicable unless an expensive \"look-ahead\" transform is employed first to add congruency to the recursive computing. This, nonetheless, will increase the hardware complexity drastically. In this paper, we propose a new design scheme which is based on the principle of distributed arithmetic (DA). The DA approach tries to exploit parallelism at bit level and can effectively improve the throughput rate of the filter without resorting to the look ahead transform as in the bit-parallel designs. For those high order recursive filter designs, we further propose a decomposition scheme to minimize complexity. To demonstrate this new scheme, a four-tap recursive AR filter design is also given in this paper.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133332008","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":"Optimal starting-stopping problems for Markov-Feller processes","authors":"J. Menaldi, M. Robin, Min Sun","doi":"10.1109/SECON.1996.510040","DOIUrl":"https://doi.org/10.1109/SECON.1996.510040","url":null,"abstract":"By means of nested inequalities in semigroup form we give a characterization of the value functions of the starting-stopping problem for general Markov-Feller processes. Next, we consider two versions of constrained problems on the final state or on the final time. The optimal stopping problems have been extensively studied for diffusion processes, or other Markov processes, or for more general stochastic processes.","PeriodicalId":338029,"journal":{"name":"Proceedings of SOUTHEASTCON '96","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134167276","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}