{"title":"Segmental K-Means initialization for SOM-based speaker clustering","authors":"O. Ben-Harush, I. Lapidot, H. Guterman","doi":"10.21437/Interspeech.2008-4","DOIUrl":"https://doi.org/10.21437/Interspeech.2008-4","url":null,"abstract":"A new approach for initial assignment of data in a speaker clustering application is presented. This approach employs segmental k-means clustering algorithm prior to competitive based learning. The clustering system relies on self-organizing maps (SOM) for speaker modeling and as a likelihood estimator. Performance is evaluated on 108 two speaker conversations taken from LDC CALLHOME American English Speech corpus using NIST criterion and shows an improvement of 20%-30% in cluster error rate (CER) relative to the randomly initialized clustering system. The number of iterations was reduced significantly, which contributes to both speed and efficiency of the clustering system.","PeriodicalId":224749,"journal":{"name":"2008 50th International Symposium ELMAR","volume":"31 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130690436","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":"Fully invariant complex logarithmic r-θ map for hybrid optical neural network filter for object recognition within cluttered scenes","authors":"I. Kypraios, R. Young, P. Birch, C. Chatwin","doi":"10.1007/978-3-642-02900-4_5","DOIUrl":"https://doi.org/10.1007/978-3-642-02900-4_5","url":null,"abstract":"","PeriodicalId":224749,"journal":{"name":"2008 50th International Symposium ELMAR","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116190102","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 architecture for interactive target-oriented e-Learning systems","authors":"C. D. Castro, G. Leonardi, P. Toppan","doi":"10.3991/ijet.v4i4.782","DOIUrl":"https://doi.org/10.3991/ijet.v4i4.782","url":null,"abstract":"In this paper, an architecture is proposed for the development of an e-Learning system based on Petri Nets and on a hybrid LDAP-SQL database. In this approach, e-Learning paths are initially tailored to the userpsilas aims and, during the learning process, are dynamically adapted to his needs. By means of an ad hoc user-system interface, each learner is allowed to specify his initial target and, if he decides to deepen some issues, is authorised to redefine such target over time. This process is guided by a ldquoPath Decision Modulerdquo based on Petri Nets, which checks the userpsilas learning level and consequently decides whether further issues can be faced or not. The underlying LDAP-SQL database benefits from the joint use of directory services and relational databases, used for the storage of learning material and dynamical paths respectively. Although the focus is on the e-Learning module, this architecture can be considered for a possible integration with m-Learning facilities.","PeriodicalId":224749,"journal":{"name":"2008 50th International Symposium ELMAR","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114375141","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":"Influence of the calorimetric system setup on the output acoustic power measurement results","authors":"A. Petošić, B. Ivančević, D. Svilar","doi":"10.1121/1.2935643","DOIUrl":"https://doi.org/10.1121/1.2935643","url":null,"abstract":"The problem of measuring an output acoustic power using calorimetric method has been considered in the nonlinear regimes of ultrasound transmitter. The point ultrasound source with sonotrode tip has been driven at different excitation electrical power levels and the influence of the tip position in the different calorimetric systems on the measurement results on output acoustic power is considered. Two calorimetric systems with different volumes of loading liquid (water) and different geometries (having influence on thermodynamical losses) have been used in the experiments. The exponential experimental temperature-time curves have been fitted with theoretical solutions and losses of the systems, output acoustic power and electroacoustic efficiency factor have been found assuming that all ultrasound energy is absorbed in the system. The radiation impedance dependence on complex pressure field distribution in the calorimetric system has been considered measuring the input electrical impedance of loaded and unloaded transmitter.","PeriodicalId":224749,"journal":{"name":"2008 50th International Symposium ELMAR","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116948094","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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