Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659827
H. Meral, B. Sankur, A. S. Ozsoy
Text watermarking is a recent subject of natural language processing aimed to the content security and authentication information of the text documents. This study explores possible text watermarking tools for Turkish language. Various watermarking tools such as changes of morphological and syntactic structures, and swapping of synonyms and punctuations are investigated and their relative performance measured
{"title":"Watermarking Tools for Turkish Texts","authors":"H. Meral, B. Sankur, A. S. Ozsoy","doi":"10.1109/SIU.2006.1659827","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659827","url":null,"abstract":"Text watermarking is a recent subject of natural language processing aimed to the content security and authentication information of the text documents. This study explores possible text watermarking tools for Turkish language. Various watermarking tools such as changes of morphological and syntactic structures, and swapping of synonyms and punctuations are investigated and their relative performance measured","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"188 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114008763","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659899
N. O. Unverdi, O. Turkmen
Optical sensors, one of the principal components of optical communications, are studied, classified and their working principles are explained. The components of optical fiber sensors are discussed and their characteristics evaluated. The Mach-Zehnder interferometric sensor, an optical fiber sensor largely used in physics, chemistry and biomedical applications is assessed, its phase variation analyzed in the light of the theory of elasticity, and critical parameters are determined for increasing the sensitivity of the sensor
{"title":"Propagation Analysis in Optical Fiber Interferometric Sensors","authors":"N. O. Unverdi, O. Turkmen","doi":"10.1109/SIU.2006.1659899","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659899","url":null,"abstract":"Optical sensors, one of the principal components of optical communications, are studied, classified and their working principles are explained. The components of optical fiber sensors are discussed and their characteristics evaluated. The Mach-Zehnder interferometric sensor, an optical fiber sensor largely used in physics, chemistry and biomedical applications is assessed, its phase variation analyzed in the light of the theory of elasticity, and critical parameters are determined for increasing the sensitivity of the sensor","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131534503","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659685
A. Ozen, B. Soysal, I. Kaya, I. Altas
While data speed provided by communication technologies and the data speed required for multimedia applications are competing with each other, the importance of OFDM technology, which has less intersymbol interference influences that occur in the channel, has been increasing. Deep fadings occurred as a result of multipath propagation because some sub carriers that loses its information as well as fading in a non-recoverable degree, and consequently results in a poorer system performance. Since the training speed of LMS algorithm used in estimation of channel coefficients in time domain for OFDM based systems is not generally sufficient to achieve the desired performance levels in training time defined by standards, a fuzzy logic based algorithm is adapted to get a faster performance. An application of fuzzy logic based high performance LMS algorithm for OFDM systems is investigated in this paper. The aim of the proposed method is to produce the required fuzzy rule base and fuzzy subsets for fuzzy logic controller in order to speed up the LMS algorithm. The generations of fuzzy rules are based on the comparison of estimated signal by equalizer or channel output. The obtained results of simulations show that the LMS algorithm based on fuzzy logic (F-LMS) increases the performance in OFDM systems significantly and converges to the performance of the RLS algorithm
{"title":"Production of Time Domain Fuzzy Control Rules for Channel Estimation and Equalization in OFDM Based Communication Systems","authors":"A. Ozen, B. Soysal, I. Kaya, I. Altas","doi":"10.1109/SIU.2006.1659685","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659685","url":null,"abstract":"While data speed provided by communication technologies and the data speed required for multimedia applications are competing with each other, the importance of OFDM technology, which has less intersymbol interference influences that occur in the channel, has been increasing. Deep fadings occurred as a result of multipath propagation because some sub carriers that loses its information as well as fading in a non-recoverable degree, and consequently results in a poorer system performance. Since the training speed of LMS algorithm used in estimation of channel coefficients in time domain for OFDM based systems is not generally sufficient to achieve the desired performance levels in training time defined by standards, a fuzzy logic based algorithm is adapted to get a faster performance. An application of fuzzy logic based high performance LMS algorithm for OFDM systems is investigated in this paper. The aim of the proposed method is to produce the required fuzzy rule base and fuzzy subsets for fuzzy logic controller in order to speed up the LMS algorithm. The generations of fuzzy rules are based on the comparison of estimated signal by equalizer or channel output. The obtained results of simulations show that the LMS algorithm based on fuzzy logic (F-LMS) increases the performance in OFDM systems significantly and converges to the performance of the RLS algorithm","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127716271","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659758
V. Ozkaner, T. Kayikçioglu
In this study, a Markov model for gating kinetics of sodium channel currents in dissociated cerebellar Purkinje neurons is developed. The model is based on voltage-clamped, resurgent and action potential evoked currents, known as macroscopic currents. It is different from previously developed models. In this model, some modifications are made in the number of states and channel rate constants. The model parameters are determined using trial and error procedure to minimizing the error between model responses and three experimental data sets. The developed sodium channel model reproduces quantitatively all features of the experimental data sets, with minor discrepancies
{"title":"A Markov Model Developed For Sodium Channel Currents In Cerebellar Purkinje Neurons","authors":"V. Ozkaner, T. Kayikçioglu","doi":"10.1109/SIU.2006.1659758","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659758","url":null,"abstract":"In this study, a Markov model for gating kinetics of sodium channel currents in dissociated cerebellar Purkinje neurons is developed. The model is based on voltage-clamped, resurgent and action potential evoked currents, known as macroscopic currents. It is different from previously developed models. In this model, some modifications are made in the number of states and channel rate constants. The model parameters are determined using trial and error procedure to minimizing the error between model responses and three experimental data sets. The developed sodium channel model reproduces quantitatively all features of the experimental data sets, with minor discrepancies","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134311668","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659705
T. Sonmez
The purpose of this paper is to analyze data association problem in sonar applications. Bearings only tracking algorithms are used because the range information is distorted in water. A method is proposed to associate detections with established sonar tracks using the distribution of the received signal. Using a single detection when two target's bearings are close to each other, may result in poor tracking capability. Splitting a single detection from two targets is a new method which has the potential to keep weaker target's track alive. This method is compared with PDA (probabilistic data association) filters. Monte Carlo simulation results are also given
{"title":"Splitting Algorithm for Cases with Single Detection from Sonar Data for Two Tracks","authors":"T. Sonmez","doi":"10.1109/SIU.2006.1659705","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659705","url":null,"abstract":"The purpose of this paper is to analyze data association problem in sonar applications. Bearings only tracking algorithms are used because the range information is distorted in water. A method is proposed to associate detections with established sonar tracks using the distribution of the received signal. Using a single detection when two target's bearings are close to each other, may result in poor tracking capability. Splitting a single detection from two targets is a new method which has the potential to keep weaker target's track alive. This method is compared with PDA (probabilistic data association) filters. Monte Carlo simulation results are also given","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134465731","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659859
O.S. Sarac, V. Atalay, R. Atalay
Representation of amino-acid sequences constitutes the key point in classification of proteins into functional or structural classes. The representation should contain the biologically meaningful information hidden in the primary sequence of the protein. Conserved or similar subsequences are strong indicators of functional and structural similarity. In this study we present a feature mapping that takes into account the models of the subsequences of protein sequences. An expectation-maximization algorithm along with an HMM mixture model is used to cluster and learn the models of subsequences of a given set of proteins
{"title":"A Novel Model-based Method for Feature Extraction from Protein Sequences for Classification","authors":"O.S. Sarac, V. Atalay, R. Atalay","doi":"10.1109/SIU.2006.1659859","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659859","url":null,"abstract":"Representation of amino-acid sequences constitutes the key point in classification of proteins into functional or structural classes. The representation should contain the biologically meaningful information hidden in the primary sequence of the protein. Conserved or similar subsequences are strong indicators of functional and structural similarity. In this study we present a feature mapping that takes into account the models of the subsequences of protein sequences. An expectation-maximization algorithm along with an HMM mixture model is used to cluster and learn the models of subsequences of a given set of proteins","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"480 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133048622","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659733
A. Bilgin, A. Yilmaz
Relay networks have usually been investigated within a single source (S), relay (R), and destination (D) group in the literature. In this work, cooperative diversity techniques will be investigated for relay networks having multiple S, R and D's. Simulations results for linear and uniform S, R and D localizations will be presented
{"title":"Cooperative Diversity Techniques for Wireless Networks","authors":"A. Bilgin, A. Yilmaz","doi":"10.1109/SIU.2006.1659733","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659733","url":null,"abstract":"Relay networks have usually been investigated within a single source (S), relay (R), and destination (D) group in the literature. In this work, cooperative diversity techniques will be investigated for relay networks having multiple S, R and D's. Simulations results for linear and uniform S, R and D localizations will be presented","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"298 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115449499","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659914
Y. Bastanlar, S.I. Altingovde, A. Aksay, O. Alav, O. Cavus, Y. Yardimci, O. Ulusoy, U. Gudukbay, E. Cetin, G. Akar, S. Aksoy
A Web-based system-consisting of data entrance, access and retrieval modules-is constructed for museums. Internet users that visit the e-museum, are able to view the written and visual information, belonging to the artworks in the museum, are able to follow the virtual tour prepared for the different sections of the museum, are able to browse the artworks according to certain properties, are able to search the artworks having the similar visual content with the viewed artwork
{"title":"E-Museum: Web-based Tour and Information System for Museums","authors":"Y. Bastanlar, S.I. Altingovde, A. Aksay, O. Alav, O. Cavus, Y. Yardimci, O. Ulusoy, U. Gudukbay, E. Cetin, G. Akar, S. Aksoy","doi":"10.1109/SIU.2006.1659914","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659914","url":null,"abstract":"A Web-based system-consisting of data entrance, access and retrieval modules-is constructed for museums. Internet users that visit the e-museum, are able to view the written and visual information, belonging to the artworks in the museum, are able to follow the virtual tour prepared for the different sections of the museum, are able to browse the artworks according to certain properties, are able to search the artworks having the similar visual content with the viewed artwork","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124220799","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659704
K. Kayabol, E. T. Akman
In this paper, we propose a model for image sequence based on particle mechanics. Proposed model is applied to high resolution image reconstruction problem. Hybrid Monte Carlo method is used to solve this problem
{"title":"Particle Mechanics Based Hybrid Monte Carlo Estimation of Image Sequence","authors":"K. Kayabol, E. T. Akman","doi":"10.1109/SIU.2006.1659704","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659704","url":null,"abstract":"In this paper, we propose a model for image sequence based on particle mechanics. Proposed model is applied to high resolution image reconstruction problem. Hybrid Monte Carlo method is used to solve this problem","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126144364","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 : 2006-04-17DOI: 10.1109/SIU.2006.1659686
A. Ozen, B. Soysal, I. Kaya
In this paper, carrier frequency offset (CFO) tracking performances of channel equalizers for single (SC) and multi carrier (MC) systems used in frequency selective Rayleigh fading channels are investigated. The performances of both systems for different values of CFO are compared. Since the desired performance cannot be achieved by CFO tracking ability of conventional LMS for SC and MC systems used in time varying channels, a fuzzy logic based LMS (F-LMS) algorithm is proposed. CFO tracking performance with the proposed F-LMS algorithm becomes very close to the performance of RLS algorithm with a small and negligible increment in computational complexity. Computer simulations using conventional LMS, normalized LMS, modified LMS, variable step size LMS-DFE, B-LMS-DFE and conventional RLS-DFE algorithms are performed in SC systems. The same algorithms are also used in MC (OFDM) systems in which the channel is estimated in time domain then used in frequency domain channel equalizer. For performance comparisons, the HIPERLAN/1 (SC) and HIPERLAN/2 (OFDM) standards are used as the working platforms during simulations. The obtained and compared results are given in Section 3
{"title":"The Effects of Fuzzy Logic on Carrier Frequency Offset Tracking Performance of Single and Multi Carrier Communication Systems","authors":"A. Ozen, B. Soysal, I. Kaya","doi":"10.1109/SIU.2006.1659686","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659686","url":null,"abstract":"In this paper, carrier frequency offset (CFO) tracking performances of channel equalizers for single (SC) and multi carrier (MC) systems used in frequency selective Rayleigh fading channels are investigated. The performances of both systems for different values of CFO are compared. Since the desired performance cannot be achieved by CFO tracking ability of conventional LMS for SC and MC systems used in time varying channels, a fuzzy logic based LMS (F-LMS) algorithm is proposed. CFO tracking performance with the proposed F-LMS algorithm becomes very close to the performance of RLS algorithm with a small and negligible increment in computational complexity. Computer simulations using conventional LMS, normalized LMS, modified LMS, variable step size LMS-DFE, B-LMS-DFE and conventional RLS-DFE algorithms are performed in SC systems. The same algorithms are also used in MC (OFDM) systems in which the channel is estimated in time domain then used in frequency domain channel equalizer. For performance comparisons, the HIPERLAN/1 (SC) and HIPERLAN/2 (OFDM) standards are used as the working platforms during simulations. The obtained and compared results are given in Section 3","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124952939","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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