This paper presents a methodology of human motion analysis and its clinical application used to study postural stability and balance control strategies in patients with various vestibular diseases. A marker-free analysis system was used to detect and evaluate motion of anatomical landmarks in single video camera records. The reconstructed motion trajectories of particular body segments were used to derive significant biomechanical parameters during balance control oriented tests with and without visual input. Pilot study was realized at the group of 22 patients to verify both the system functionality and the methodology suitability. All here included patients were evaluated separately as first, because of their different impairments affecting postural control. Then, the results were analysed within the group of here included patients as well. The first results showed that the method was efficient and proved quantitative changes in posture stability parameters as well as their dependence on visual perception. Also, the results obtained in patients with similar symptoms convinced us that the increasing number of analysed subjects and thus increasing database of patients' data could help clinicians to identify the background of closely related groups of posture disorders as well as to improve the patients' health status by supporting of decision making process aimed to select optimal treatment.
{"title":"Quantification of postural stability changes in patients with impairments in postural control","authors":"J. Majerník, M. Molcan, J. Živčák","doi":"10.1109/DT.2014.6868719","DOIUrl":"https://doi.org/10.1109/DT.2014.6868719","url":null,"abstract":"This paper presents a methodology of human motion analysis and its clinical application used to study postural stability and balance control strategies in patients with various vestibular diseases. A marker-free analysis system was used to detect and evaluate motion of anatomical landmarks in single video camera records. The reconstructed motion trajectories of particular body segments were used to derive significant biomechanical parameters during balance control oriented tests with and without visual input. Pilot study was realized at the group of 22 patients to verify both the system functionality and the methodology suitability. All here included patients were evaluated separately as first, because of their different impairments affecting postural control. Then, the results were analysed within the group of here included patients as well. The first results showed that the method was efficient and proved quantitative changes in posture stability parameters as well as their dependence on visual perception. Also, the results obtained in patients with similar symptoms convinced us that the increasing number of analysed subjects and thus increasing database of patients' data could help clinicians to identify the background of closely related groups of posture disorders as well as to improve the patients' health status by supporting of decision making process aimed to select optimal treatment.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117235468","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}
This study was based on the examination of Phadiatop onerous test at the Clinic of Occupational and Preventive Medicine in order to save money and not to make unnecessary testing. The aim of this study is to assess the outcome of the test Phadiatop using personal or family medical records history only. This estimation used statistical methods, specifically ordinal regression. The most important findings are that Phadiatop test result does not imply eczema; it is a different immune response and the disease is not relevant in personal or family anamnesis. The success rate of classifying each patient into one of the five Phadiatop test groups according to the seriousness of diseases was about 68%. Also a testing based on age groups of the patients was done using this database. The presence of the positive Phadiatop test was the most common for people born between 1972 and 1981, where the genetic predispositions for a positive Phadiatop test results are about 39%.
{"title":"Ordinal regression for classification of patients into one of the individual Phadiatop test groups","authors":"P. Kuránová, Zdeňka Hajduková","doi":"10.1109/DT.2014.6868711","DOIUrl":"https://doi.org/10.1109/DT.2014.6868711","url":null,"abstract":"This study was based on the examination of Phadiatop onerous test at the Clinic of Occupational and Preventive Medicine in order to save money and not to make unnecessary testing. The aim of this study is to assess the outcome of the test Phadiatop using personal or family medical records history only. This estimation used statistical methods, specifically ordinal regression. The most important findings are that Phadiatop test result does not imply eczema; it is a different immune response and the disease is not relevant in personal or family anamnesis. The success rate of classifying each patient into one of the five Phadiatop test groups according to the seriousness of diseases was about 68%. Also a testing based on age groups of the patients was done using this database. The presence of the positive Phadiatop test was the most common for people born between 1972 and 1981, where the genetic predispositions for a positive Phadiatop test results are about 39%.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116388008","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}
After the failure of a network node or a link, a period of impaired connectivity is experienced until the network reconverges. During this period, specific destinations are not reachable, causing issues specifically with critical and time-sensitive services such as Voice over IP. The process of network reconvergence can last from a few milliseconds to tens of seconds. To address these issues, IP Fast Reroute (IPFRR) mechanisms have been developed. These mechanisms can reroute via temporary alternative backup paths until the network reconverges. Using IPFRR mechanisms, network recovery time is shortened generally to milliseconds. Multiple approaches to IPFRR exist, ranging from selecting loop-free neighbors through tunneling mechanisms. In this paper, we introduce a new idea of tunnel utilization as a prospective IPFRR mechanism.
{"title":"Tunnels in IP Fast Reroute","authors":"J. Papán, P. Segec, P. Paluch","doi":"10.1109/DT.2014.6868726","DOIUrl":"https://doi.org/10.1109/DT.2014.6868726","url":null,"abstract":"After the failure of a network node or a link, a period of impaired connectivity is experienced until the network reconverges. During this period, specific destinations are not reachable, causing issues specifically with critical and time-sensitive services such as Voice over IP. The process of network reconvergence can last from a few milliseconds to tens of seconds. To address these issues, IP Fast Reroute (IPFRR) mechanisms have been developed. These mechanisms can reroute via temporary alternative backup paths until the network reconverges. Using IPFRR mechanisms, network recovery time is shortened generally to milliseconds. Multiple approaches to IPFRR exist, ranging from selecting loop-free neighbors through tunneling mechanisms. In this paper, we introduce a new idea of tunnel utilization as a prospective IPFRR mechanism.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121943084","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}
A memory based upsampling/interpolating FIR filter modification/extension to distributed arithmetic (DA) based FIR filters is proposed that can be used for any filter coefficient set. Use of minimum or no multiplier is a desired design property when signal processing is performed using FPGAs since multipliers are scarce/expensive resources within FPGAs whereas registers and such are abundant. Upsampling a digital stream is usually performed by inserting zeros between original samples followed by a low pass filter to reject images. Compared to basic distributed arithmetic based filter designs where partial products/sums are stored in memory blocks, our design stores interpolation values. These samples are output sequentially using a simple counter, eliminating zero insertions and saving circuit elements. As an example FIR filter, we have designed a raised-cosine band-limiting filter with example roll-off factor and upsampling values. Successful implementation using VHDL+FPGA with ease has proven that the approach is a simple and effective compared to input upsampling.
{"title":"Direct generation of upsampled FIR filter response a simple extension to filters with distributed arithmetic","authors":"Zeynep Kaya, E. Seke","doi":"10.1109/DT.2014.6868700","DOIUrl":"https://doi.org/10.1109/DT.2014.6868700","url":null,"abstract":"A memory based upsampling/interpolating FIR filter modification/extension to distributed arithmetic (DA) based FIR filters is proposed that can be used for any filter coefficient set. Use of minimum or no multiplier is a desired design property when signal processing is performed using FPGAs since multipliers are scarce/expensive resources within FPGAs whereas registers and such are abundant. Upsampling a digital stream is usually performed by inserting zeros between original samples followed by a low pass filter to reject images. Compared to basic distributed arithmetic based filter designs where partial products/sums are stored in memory blocks, our design stores interpolation values. These samples are output sequentially using a simple counter, eliminating zero insertions and saving circuit elements. As an example FIR filter, we have designed a raised-cosine band-limiting filter with example roll-off factor and upsampling values. Successful implementation using VHDL+FPGA with ease has proven that the approach is a simple and effective compared to input upsampling.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115793247","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}
The paper presents a hybrid model for pedestrian simulation, which combines three types (granularities) of simulation models - microscopic, mesoscopic and macroscopic. Transfers of pedestrians between zones with different granularity are described in detail. The model is implemented in the simulation tool PedSim, which utilizes agent-oriented architecture ABAsim. Specialized managing agents which handle individual model types are presented and their activity is briefly described.
{"title":"Hybrid model for pedestrian movement simulation","authors":"Anna Kormanová, Michal Varga, N. Adamko","doi":"10.1109/DT.2014.6868707","DOIUrl":"https://doi.org/10.1109/DT.2014.6868707","url":null,"abstract":"The paper presents a hybrid model for pedestrian simulation, which combines three types (granularities) of simulation models - microscopic, mesoscopic and macroscopic. Transfers of pedestrians between zones with different granularity are described in detail. The model is implemented in the simulation tool PedSim, which utilizes agent-oriented architecture ABAsim. Specialized managing agents which handle individual model types are presented and their activity is briefly described.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126037449","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}
The problem of development of indicators characterizing quantitative the training sample properties for the problems of pattern recognition and intelligent diagnosis is solved. It includes such measures as a sample monotonicity, complexity, repetition, relative dimensionality, relative dependence approximation simplicity, relative inconsistency, evenness, class separability and compactness, integrated criteria of sample quality evaluation, sample and feature selection criteria. The using of offered criterions in practice allows to automatize the process of a construction, analysis and comparison of neural models for pattern recognition problem.
{"title":"The sample properties evaluation for pattern recognition and intelligent diagnosis","authors":"S. Subbotin","doi":"10.1109/DT.2014.6868734","DOIUrl":"https://doi.org/10.1109/DT.2014.6868734","url":null,"abstract":"The problem of development of indicators characterizing quantitative the training sample properties for the problems of pattern recognition and intelligent diagnosis is solved. It includes such measures as a sample monotonicity, complexity, repetition, relative dimensionality, relative dependence approximation simplicity, relative inconsistency, evenness, class separability and compactness, integrated criteria of sample quality evaluation, sample and feature selection criteria. The using of offered criterions in practice allows to automatize the process of a construction, analysis and comparison of neural models for pattern recognition problem.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123297567","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}
Spoken Dialogue Systems (SDSs) are computer based systems developed for providing voice services by using automatic speech recognition and text-to-speech technologies. In this paper, a design, development and implementation of a new application to the existing Slovak SDS called IRKR_UNIZA is introduced. The new service provides information about urban transport (local bus timetables) in Žilina city. The IRKR_UNIZA system is connected to the telephone network of the University of Žilina and thus the new service is accessible from any telecommunication device via PSTN or GSM network. The presented service may serve as an alternative to existing web services.
{"title":"Development of voice operated service for Žilina local transport timetable","authors":"Igor Guoth, R. Jarina","doi":"10.1109/DT.2014.6868695","DOIUrl":"https://doi.org/10.1109/DT.2014.6868695","url":null,"abstract":"Spoken Dialogue Systems (SDSs) are computer based systems developed for providing voice services by using automatic speech recognition and text-to-speech technologies. In this paper, a design, development and implementation of a new application to the existing Slovak SDS called IRKR_UNIZA is introduced. The new service provides information about urban transport (local bus timetables) in Žilina city. The IRKR_UNIZA system is connected to the telephone network of the University of Žilina and thus the new service is accessible from any telecommunication device via PSTN or GSM network. The presented service may serve as an alternative to existing web services.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122480258","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}
The general principles of an estimation of efficiency of functioning of logistical complexes on the basis of modeling with the account of hierarchical construction and influence of the human factor are considered. The indicators of efficiency depending on change of external economic conditions are proved.
{"title":"Methodology of research of efficiency logistical complexes","authors":"H. Zhivitskaya","doi":"10.1109/DT.2014.6868742","DOIUrl":"https://doi.org/10.1109/DT.2014.6868742","url":null,"abstract":"The general principles of an estimation of efficiency of functioning of logistical complexes on the basis of modeling with the account of hierarchical construction and influence of the human factor are considered. The indicators of efficiency depending on change of external economic conditions are proved.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"128 3-4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121594353","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}
The goal of this conference paper is to give information about the problematics of primary computer and information literacy among pupils attending elementary school. Furthermore the paper describes a process of making and evaluating of an accomplished survey which aim was to analyze a present state of primary computer and information literacy by a form of questionnaire. Literacy as a concept is described first then the primary computer and information literacy as such follows. Hereafter this paper deals with computer and information literacy's grades that are defined by curricula documents. Afterwards the actual possibilities of how to map a present state of primary computer and information literacy among pupils attending elementary school are put forward and the qualifications of their very teachers in a field of primary information education are assessed. In this conference paper answers for following theses shall be detected: What kind of qualification and precondition does a teacher himself possess for schooling the computer and information literacy? What kind of professional trainings, previews studies or additional pedagogical education of some kind has a responded teacher achieved? In what way do responded teachers themselves assess their pupil's qualifications in the field of computer and information literacy?
{"title":"Survey of primary computer and information literacy among pupils attending elementary school","authors":"Lukáš Círus","doi":"10.1109/DT.2014.6868688","DOIUrl":"https://doi.org/10.1109/DT.2014.6868688","url":null,"abstract":"The goal of this conference paper is to give information about the problematics of primary computer and information literacy among pupils attending elementary school. Furthermore the paper describes a process of making and evaluating of an accomplished survey which aim was to analyze a present state of primary computer and information literacy by a form of questionnaire. Literacy as a concept is described first then the primary computer and information literacy as such follows. Hereafter this paper deals with computer and information literacy's grades that are defined by curricula documents. Afterwards the actual possibilities of how to map a present state of primary computer and information literacy among pupils attending elementary school are put forward and the qualifications of their very teachers in a field of primary information education are assessed. In this conference paper answers for following theses shall be detected: What kind of qualification and precondition does a teacher himself possess for schooling the computer and information literacy? What kind of professional trainings, previews studies or additional pedagogical education of some kind has a responded teacher achieved? In what way do responded teachers themselves assess their pupil's qualifications in the field of computer and information literacy?","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114170169","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}
O. Tarasyuk, A. Gorbenko, V. Kharchenko, T. Hollstein
In the paper we address a problem of throughput unfairness inherent in the very nature of multirate Wi-Fi networks employing CSMA/CA mechanism. This unfairness exhibits itself through the fact that slow clients consume more airtime to transfer a given amount of data, leaving less airtime for fast clients. The paper introduces analytical models allowing to estimate a fair contention window (CW) size to be used by each station depending on a ratio between station's data rates. Finally, we propose a lightweight distributed algorithm that enables stations to dynamically adapt their CW so that a suboptimal airtime distribution between them is ensured. It prevents network throughput from being dramatically degraded when a slow station is connected to the network.
{"title":"Contention window adaptation to ensure airtime consumption fairness in multirate Wi-Fi networks","authors":"O. Tarasyuk, A. Gorbenko, V. Kharchenko, T. Hollstein","doi":"10.1109/DT.2014.6868737","DOIUrl":"https://doi.org/10.1109/DT.2014.6868737","url":null,"abstract":"In the paper we address a problem of throughput unfairness inherent in the very nature of multirate Wi-Fi networks employing CSMA/CA mechanism. This unfairness exhibits itself through the fact that slow clients consume more airtime to transfer a given amount of data, leaving less airtime for fast clients. The paper introduces analytical models allowing to estimate a fair contention window (CW) size to be used by each station depending on a ratio between station's data rates. Finally, we propose a lightweight distributed algorithm that enables stations to dynamically adapt their CW so that a suboptimal airtime distribution between them is ensured. It prevents network throughput from being dramatically degraded when a slow station is connected to the network.","PeriodicalId":330975,"journal":{"name":"The 10th International Conference on Digital Technologies 2014","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127726754","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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