A. Antonova, E. Stefanova, N. Nikolova, Pencho Mihnev, B. Bontchev
Universities need to increasingly adapt their educational methods in order to prepare the new generation of experts with additional skills for the future of work. Especially in the field of ICT, besides proficiency in theoretical and subject-related ICT knowledge and practical programming skills, young graduates have to demonstrate mastery in different transversal and soft skills. Taking into account that the ICT sector is one of the most knowledge-intensive, export-oriented and globally recognized sectors in Bulgaria, the quality of the ICT training is substantially important for its future competitiveness and growth. Stepping on a theoretical framework for 21st century skills, the present research aims to outline what are the key 21st century skills of the young graduates, as evaluated by ICT employers and University lecturers. By presenting the outcomes of ten in-depth, semi-structured interviews with company owners, business leaders, HR managers, and academics, the paper outlines the main trends and rankings of the soft skills for ICT graduates, without taking in consideration the specific professional competences or subject-related knowledge. The first part introduces the context, the methodology and the scope of the research. The outcomes of the interviews are presented both as quantitative figures and as specific comments of the participants, highlighting different practical aspects. Finally, the current analysis provides fruitful insights and recommendations about the new types of methods for training relevant for the ICT sector 21st century skills.
{"title":"21st Century Skills of ICT Professionals: the Requirements of Business and Readiness of Higher Education in Bulgaria","authors":"A. Antonova, E. Stefanova, N. Nikolova, Pencho Mihnev, B. Bontchev","doi":"10.1145/3407982.3408004","DOIUrl":"https://doi.org/10.1145/3407982.3408004","url":null,"abstract":"Universities need to increasingly adapt their educational methods in order to prepare the new generation of experts with additional skills for the future of work. Especially in the field of ICT, besides proficiency in theoretical and subject-related ICT knowledge and practical programming skills, young graduates have to demonstrate mastery in different transversal and soft skills. Taking into account that the ICT sector is one of the most knowledge-intensive, export-oriented and globally recognized sectors in Bulgaria, the quality of the ICT training is substantially important for its future competitiveness and growth. Stepping on a theoretical framework for 21st century skills, the present research aims to outline what are the key 21st century skills of the young graduates, as evaluated by ICT employers and University lecturers. By presenting the outcomes of ten in-depth, semi-structured interviews with company owners, business leaders, HR managers, and academics, the paper outlines the main trends and rankings of the soft skills for ICT graduates, without taking in consideration the specific professional competences or subject-related knowledge. The first part introduces the context, the methodology and the scope of the research. The outcomes of the interviews are presented both as quantitative figures and as specific comments of the participants, highlighting different practical aspects. Finally, the current analysis provides fruitful insights and recommendations about the new types of methods for training relevant for the ICT sector 21st century skills.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117299109","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}
Computation of the minimum dominating set problem is a classical discrete optimization problem in graph theory. Recently, it has found application in the network controlling theory. In this paper, there are compared three approaches of small dominating set computation. The first one is based on the integer linear programming. The second one is the combined hill-climbing algorithm which is based on the randomization and binary searching. Both are compared with a simply greedy algorithm. The experiments were conducted for three different graph classes. The integer linear programming achieved the best performance for the large real-world network's analysis.
{"title":"Comparison of algorithms for near-optimal dominating sets computation in real-world networks","authors":"Martin Nehéz, Dusan Bernát, Martin Klauco","doi":"10.1145/2812428.2812443","DOIUrl":"https://doi.org/10.1145/2812428.2812443","url":null,"abstract":"Computation of the minimum dominating set problem is a classical discrete optimization problem in graph theory. Recently, it has found application in the network controlling theory.\u0000 In this paper, there are compared three approaches of small dominating set computation. The first one is based on the integer linear programming. The second one is the combined hill-climbing algorithm which is based on the randomization and binary searching. Both are compared with a simply greedy algorithm. The experiments were conducted for three different graph classes. The integer linear programming achieved the best performance for the large real-world network's analysis.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127276097","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 practical approaches and techniques to speeding up implementations of nearest neighbour search/classification algorithm for high dimensional data and/or many training examples. Such settings often appear in the fields of big data and data mining. We apply a fast iterative form of polar decomposition and use the computed matrix to pre-select smaller number of candidate classes for the query element. We show that additional speed up can be achieved when the training classes consists of many instances by subdividing them in subclasses by fast approximation of some clustering algorithm and the resulting classification is used for building the decomposition matrix. Our pre-processing (depends linearly or near linearly on the number of examples and dimensions) and pre-selection steps (depends on number of classes) can be used with any well-known indexing method as annulus method, kd-trees, metric trees, r-trees, cover trees, etc to limit the training instances used in the search/classification process. Finally we introduce what we name cluster index and show that in practice it extends the applicability of the indexing structures with higher order complexity to bigger datasets.
{"title":"On speeding up the implementation of nearest neighbour search and classification","authors":"Ivo Marinchev, G. Agre","doi":"10.1145/2812428.2812464","DOIUrl":"https://doi.org/10.1145/2812428.2812464","url":null,"abstract":"The paper presents practical approaches and techniques to speeding up implementations of nearest neighbour search/classification algorithm for high dimensional data and/or many training examples. Such settings often appear in the fields of big data and data mining. We apply a fast iterative form of polar decomposition and use the computed matrix to pre-select smaller number of candidate classes for the query element. We show that additional speed up can be achieved when the training classes consists of many instances by subdividing them in subclasses by fast approximation of some clustering algorithm and the resulting classification is used for building the decomposition matrix. Our pre-processing (depends linearly or near linearly on the number of examples and dimensions) and pre-selection steps (depends on number of classes) can be used with any well-known indexing method as annulus method, kd-trees, metric trees, r-trees, cover trees, etc to limit the training instances used in the search/classification process. Finally we introduce what we name cluster index and show that in practice it extends the applicability of the indexing structures with higher order complexity to bigger datasets.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122361828","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}
Petri Pulkkinen, Johannes Holvitie, O. Nevalainen, V. Leppänen
A novel process for identifying reusable program clones is described in this work. The process is applied to a very demanding context, a large-scale closed source healthcare software system. As results, the applicability and maturity of the clone detection system are discussed but also the results of the study are summarized. In this, especial care has been taken in order to retain result comparability with other hallmark studies on clone detection.
{"title":"Reusability based program clone detection: case study on large scale healthcare software system","authors":"Petri Pulkkinen, Johannes Holvitie, O. Nevalainen, V. Leppänen","doi":"10.1145/2812428.2812471","DOIUrl":"https://doi.org/10.1145/2812428.2812471","url":null,"abstract":"A novel process for identifying reusable program clones is described in this work. The process is applied to a very demanding context, a large-scale closed source healthcare software system. As results, the applicability and maturity of the clone detection system are discussed but also the results of the study are summarized. In this, especial care has been taken in order to retain result comparability with other hallmark studies on clone detection.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125787424","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}
Now we have a number of database technologies called usually NoSQL, like key-value, column-oriented, and document stores as well as search engines and graph databases. Whereas SQL software vendors offer advanced products with the capability to handle highly complex queries and transactions, NoSQL databases share rather characteristics concerning scaling and performance, as e.g. auto-sharding, distributed query support, and integrated caching. Their drawbacks can be a lack of schema or data consistency, difficulty in testing and maintaining, and absence of a higher query language. Complex data modelling and the SQL language as the only access tool to data are missing here. On the other hand, last studies show that both SQL and NoSQL databases have value for both for transactional and analytical Big Data. Top databases providers offer rearchitected database technologies combining row data stores with columnar in-memory compression enabling processing large data sets and analytical querying, often over massive, continuous data streams. The technological progress led to development of massively parallel processing analytic databases. The paper presents some details of current database technologies, their pros and cons in different application environments, and emerging trends in this area.
{"title":"Database technologies in the world of big data","authors":"J. Pokorný","doi":"10.1145/2812428.2812429","DOIUrl":"https://doi.org/10.1145/2812428.2812429","url":null,"abstract":"Now we have a number of database technologies called usually NoSQL, like key-value, column-oriented, and document stores as well as search engines and graph databases. Whereas SQL software vendors offer advanced products with the capability to handle highly complex queries and transactions, NoSQL databases share rather characteristics concerning scaling and performance, as e.g. auto-sharding, distributed query support, and integrated caching. Their drawbacks can be a lack of schema or data consistency, difficulty in testing and maintaining, and absence of a higher query language. Complex data modelling and the SQL language as the only access tool to data are missing here. On the other hand, last studies show that both SQL and NoSQL databases have value for both for transactional and analytical Big Data. Top databases providers offer rearchitected database technologies combining row data stores with columnar in-memory compression enabling processing large data sets and analytical querying, often over massive, continuous data streams. The technological progress led to development of massively parallel processing analytic databases. The paper presents some details of current database technologies, their pros and cons in different application environments, and emerging trends in this area.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131083384","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}
Today navigation systems for automobiles are highly developed. Furthermore, also for pedestrians and users of public transport technical means for navigation support exist. However, there is a lack of help for handicapped persons. What are the reasons for this situation? The answer is simple: Handicapped persons are a target group for IT-technology that is small in comparison to all other users of navigation systems. Furthermore they demand another database with much more detailed path characteristics and partially other system functionality than conventional navigation systems. This paper describes the user-group-specific demands on technical navigation support and the co-operative development of a corresponding system in the frame of a R&D-project, funded by the German Federal Ministry for Education and Research. It concentrates on modelling the potentials and restrictions of movement opportunities of handicapped people and on route optimization.
{"title":"Navigation support for old and handicapped persons in urban regions","authors":"A. Iwainsky","doi":"10.1145/2812428.2812463","DOIUrl":"https://doi.org/10.1145/2812428.2812463","url":null,"abstract":"Today navigation systems for automobiles are highly developed. Furthermore, also for pedestrians and users of public transport technical means for navigation support exist. However, there is a lack of help for handicapped persons. What are the reasons for this situation? The answer is simple: Handicapped persons are a target group for IT-technology that is small in comparison to all other users of navigation systems. Furthermore they demand another database with much more detailed path characteristics and partially other system functionality than conventional navigation systems. This paper describes the user-group-specific demands on technical navigation support and the co-operative development of a corresponding system in the frame of a R&D-project, funded by the German Federal Ministry for Education and Research. It concentrates on modelling the potentials and restrictions of movement opportunities of handicapped people and on route optimization.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114908611","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 paper gives a complete overview about a new software for structural analysis. The software "Good Vibrations" is an innovative program for the calculation of vibrational properties of mechanical structures and buildings by means of the known methods of experimental (with selective excitation), operational (stochastic or environmental stimulus) modal analysis and operating deflection shapes (under given operating situations). Here, the vibrational properties are characterized by the modal parameters: natural frequencies, damping, mode shapes (deformation). Currently, it is the only software on the market that offers this comprehensive combination of algorithms. The results of structural analysis can be used directly for vibration analysis / optimization, to improve the associated FE (Finite Element)-model or for vibration based Structural Health Monitoring.
{"title":"\"Good Vibrations\": a complete software solution for experimental, operational modal analysis and operating deflection shapes","authors":"D. Herfert, M. Gollnick","doi":"10.1145/2812428.2812478","DOIUrl":"https://doi.org/10.1145/2812428.2812478","url":null,"abstract":"This paper gives a complete overview about a new software for structural analysis. The software \"Good Vibrations\" is an innovative program for the calculation of vibrational properties of mechanical structures and buildings by means of the known methods of experimental (with selective excitation), operational (stochastic or environmental stimulus) modal analysis and operating deflection shapes (under given operating situations). Here, the vibrational properties are characterized by the modal parameters: natural frequencies, damping, mode shapes (deformation). Currently, it is the only software on the market that offers this comprehensive combination of algorithms. The results of structural analysis can be used directly for vibration analysis / optimization, to improve the associated FE (Finite Element)-model or for vibration based Structural Health Monitoring.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128204690","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}
András London, Áron Pelyhe, C. Holló, Tamás Németh
In this study, we discuss the possible application of the ubiquitous complex network approach for information extraction from educational data. Since a huge amount of data (which is detailed as well) is produced by the complex administration systems of educational institutes, instead of the classical statistical methods, new types of data processing techniques are required to handle it. We define several suitable network representations of students, teachers and subjects in public education and present some possible ways of how graph mining techniques can be used to get detailed information about them. Depending on the construction of the underlying graph, we examine several network models and discuss which are the most appropriate graph mining tools (like community detection and ranking and centrality measures) that can be applied on them. Lastly, we attempt to highlight the many advantages of using graph-based data mining in educational data against the classical evaluation techniques.
{"title":"Applying graph-based data mining concepts to the educational sphere","authors":"András London, Áron Pelyhe, C. Holló, Tamás Németh","doi":"10.1145/2812428.2812436","DOIUrl":"https://doi.org/10.1145/2812428.2812436","url":null,"abstract":"In this study, we discuss the possible application of the ubiquitous complex network approach for information extraction from educational data. Since a huge amount of data (which is detailed as well) is produced by the complex administration systems of educational institutes, instead of the classical statistical methods, new types of data processing techniques are required to handle it. We define several suitable network representations of students, teachers and subjects in public education and present some possible ways of how graph mining techniques can be used to get detailed information about them. Depending on the construction of the underlying graph, we examine several network models and discuss which are the most appropriate graph mining tools (like community detection and ranking and centrality measures) that can be applied on them. Lastly, we attempt to highlight the many advantages of using graph-based data mining in educational data against the classical evaluation techniques.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126682845","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 introduces a blueprint for system that automates and facilitates the process of medico-legal exams and inquests. The system responsibilities are to mediate the communication between institutions and forensic doctors and to organize, store and archive tasks and data based on the legal regulations. Currently in Bulgaria and the Balkans there is no fully computerized solution which is the main reason for this paper. The system would allow examiners to focus on the actual medical work and not on the paper work. Key advantages of the system are the automation in the process, the communication with external systems and participants, the dynamic modelling of the processes and the security model that would keep patient privacy and data integrity.
{"title":"Architecture of automated communication and data processing system for forensic medicine","authors":"Borislav Banchev, Tsvetozar Georgiev","doi":"10.1145/2812428.2812437","DOIUrl":"https://doi.org/10.1145/2812428.2812437","url":null,"abstract":"The paper introduces a blueprint for system that automates and facilitates the process of medico-legal exams and inquests. The system responsibilities are to mediate the communication between institutions and forensic doctors and to organize, store and archive tasks and data based on the legal regulations. Currently in Bulgaria and the Balkans there is no fully computerized solution which is the main reason for this paper. The system would allow examiners to focus on the actual medical work and not on the paper work. Key advantages of the system are the automation in the process, the communication with external systems and participants, the dynamic modelling of the processes and the security model that would keep patient privacy and data integrity.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132369756","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}
D. Paneva-Marinova, Maxim Goynov, Detelin Luchev, R. Pavlov
The paper presents a solution of content interoperability among three digital library systems keeping Orthodox artefacts and knowledge: Encyclopaedia Slavica Sanctorum Calendar, Bulgarian Iconographical Digital Library and Multimedia Fund "BellKnow". The content of these environments is naturally complementing each other and the proposed content interoperability aims to provide better access to the objects and knowledge for all of the target users and also to provide mutual content enrichment.
{"title":"Solution for content interoperability among digital libraries for orthodox artefacts and knowledge","authors":"D. Paneva-Marinova, Maxim Goynov, Detelin Luchev, R. Pavlov","doi":"10.1145/2812428.2812474","DOIUrl":"https://doi.org/10.1145/2812428.2812474","url":null,"abstract":"The paper presents a solution of content interoperability among three digital library systems keeping Orthodox artefacts and knowledge: Encyclopaedia Slavica Sanctorum Calendar, Bulgarian Iconographical Digital Library and Multimedia Fund \"BellKnow\". The content of these environments is naturally complementing each other and the proposed content interoperability aims to provide better access to the objects and knowledge for all of the target users and also to provide mutual content enrichment.","PeriodicalId":316788,"journal":{"name":"International Conference on Computer Systems and Technologies","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115839579","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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