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Proceedings of the 21st Pan-Hellenic Conference on Informatics最新文献

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Network slicing for 5G networks: A survey and an analysis of future trends 5G网络的网络切片:未来趋势的调查与分析
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139392
A. Kaloxylos
{"title":"Network slicing for 5G networks: A survey and an analysis of future trends","authors":"A. Kaloxylos","doi":"10.1145/3139367.3139392","DOIUrl":"https://doi.org/10.1145/3139367.3139392","url":null,"abstract":"The support of network slicing in 5G networks is one of the hottest research topics. Slicing is considered to be one of the key enablers for multi-tenancy support and multi-service provision. During the past years, network slicing has been thoroughly investigated, but still several issues remain open. This paper provides a comprehensive overview of solutions and discusses the main trends and open issues.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130977105","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}
引用次数: 1
RiSKi: A Framework for Modeling Cyber Threats to Estimate Risk for Data Breach Insurance RiSKi:数据泄露保险风险评估的网络威胁建模框架
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139426
A. Panou, Christoforos Ntantogian, C. Xenakis
{"title":"RiSKi: A Framework for Modeling Cyber Threats to Estimate Risk for Data Breach Insurance","authors":"A. Panou, Christoforos Ntantogian, C. Xenakis","doi":"10.1145/3139367.3139426","DOIUrl":"https://doi.org/10.1145/3139367.3139426","url":null,"abstract":"Historically, the financial benefits of cyber security investments have not been calculated with the same financial discipline used to evaluate other material investments. This was mainly due to a lack of readily available data on cyber incidents impacts and systematic methodology to support the efficacy of cyber investments. In this paper we propose an innovative, cyber investment management framework named RiSKi that incorporates detection and continuous monitoring of insiders societal behavior, to the extent permitted by the law, to proactively address implied anomalies and threats and their potential business impact and risks. Moreover, it provides access to published security incidents data to enable businesses to advance their understanding of cybersecurity and awareness of the threats and consequences related to cyber breaches, and, eventually, enable faster recovery from an event. RiSKI armed with the above information, employs a methodology, and develops a supporting scenario-based cyber investment tool, for quantifying the benefits of cybersecurity investments against the many ways that potential cyber risks can affect the operation of a business.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116244913","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}
引用次数: 9
Automated parameter selection of scheduling algorithms using machine learning techniques 使用机器学习技术的调度算法的自动参数选择
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139442
P. Alefragis, Charalampos Sofos
{"title":"Automated parameter selection of scheduling algorithms using machine learning techniques","authors":"P. Alefragis, Charalampos Sofos","doi":"10.1145/3139367.3139442","DOIUrl":"https://doi.org/10.1145/3139367.3139442","url":null,"abstract":"The work describes the effort to automatically select scheduling algorithms and generate corresponding parameters for new problem instances based on the results obtained for similar problem instances that have been extensively investigated. The effort tries to vastly reduce the development cycle of optimization algorithms as parameter tuning is usually more time consuming that implementing the algorithm or model. We investigated various heuristic methods for hyper-parameter selection and evaluated different machine learning methods. The results are very promising as selecting the top 5% combination of algorithms and parameters manages to consistently achieve results that are in the top 10% of the generated solutions, if full parameter and algorithm execution is performed.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122914160","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}
引用次数: 2
SAV-IT: A software tool for interpreting and presenting dynamic Street Art image maps SAV-IT:一个用于解释和呈现动态街头艺术图像地图的软件工具
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139399
Olga Tsesmetzoglou, Paris Xyntarianos-Tsiropinas, T. Spyrou
{"title":"SAV-IT: A software tool for interpreting and presenting dynamic Street Art image maps","authors":"Olga Tsesmetzoglou, Paris Xyntarianos-Tsiropinas, T. Spyrou","doi":"10.1145/3139367.3139399","DOIUrl":"https://doi.org/10.1145/3139367.3139399","url":null,"abstract":"The purpose of this paper, is to present \"Street Art Variation - Interpretation Tool\" (a Street Art interventions 1 collection software tool) while unfolding the polymorphic character of its culture. Street Art is a method of expression, which can communicate thoughts, emotions and messages via images and symbols to everyone. The SAV-IT involves and expands the visual communication element of Street Art. The visual interventions can be anatomized with the creation of intense and compelling image maps of interconnected art works. Thus, the system exhibits all the unique ways each artist creates from their own perspective, influenced by the general context they interact with. The SAV-IT offers a well-organized and well-structured environment, based on a relational database. Not only are the interventions fully explained and assorted into categories such as message, technique, style and aesthetic, they are also categorized according to their subordinate characteristics such as size, surface etc. Since the former one share the basic features with which each artist works so as to communicate reflections, they constitute the core parameters of categorization.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126652800","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}
引用次数: 1
A hybrid conjugate gradient method based on the self-scaled memoryless BFGS update 一种基于自缩放无记忆BFGS更新的混合共轭梯度方法
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139384
I. Livieris, Stamatis Karlos, V. Tampakas, P. Pintelas
{"title":"A hybrid conjugate gradient method based on the self-scaled memoryless BFGS update","authors":"I. Livieris, Stamatis Karlos, V. Tampakas, P. Pintelas","doi":"10.1145/3139367.3139384","DOIUrl":"https://doi.org/10.1145/3139367.3139384","url":null,"abstract":"In this work, we present a new conjugate gradient method adapting the approach of the hybridization of the conjugate gradient update parameters of DY and HS+ convexly, which is based on a quasi-Newton philosophy. The computation of the hybrization parameter is obtained by minimizing the distance between the hybrid conjugate gradient direction and the self-scaling memoryless BFGS direction. Our numerical experiments indicate that our proposed method is preferable and in general superior to classic conjugate gradient methods in terms of efficiency and robustness.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133194484","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}
引用次数: 0
Automating the generation of hardware accelerators from custom arithmetic functions 从自定义算术函数自动生成硬件加速器
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139421
Giannis Petrousov, M. Dasygenis
{"title":"Automating the generation of hardware accelerators from custom arithmetic functions","authors":"Giannis Petrousov, M. Dasygenis","doi":"10.1145/3139367.3139421","DOIUrl":"https://doi.org/10.1145/3139367.3139421","url":null,"abstract":"Field programmable gate arrays (FPGAs) have become the standard for fast prototyping and evaluation of custom IP cores. However, the creation of complex circuits is a time consuming and error prone task with repeating procedures such as testing and verification. And even though there are several EDA tools which generate intellectual property (IP) blocks for specific purposes, to the best of our knowledge, there are no online tools able to design IP blocks from custom arithmetic functions. In this paper, we introduce our proof of concept (POC) circuit generator which is able to produce custom and verified hardware accelerators, specified in HDL, to speed up arbitrary integer arithmetic functions.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133705826","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}
引用次数: 0
A comparative study of CPU power consumption models for cloud simulation frameworks 云仿真框架的CPU功耗模型比较研究
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139409
Antonios T. Makaratzis, C. Filelis-Papadopoulos, K. M. Giannoutakis, G. Gravvanis, D. Tzovaras
{"title":"A comparative study of CPU power consumption models for cloud simulation frameworks","authors":"Antonios T. Makaratzis, C. Filelis-Papadopoulos, K. M. Giannoutakis, G. Gravvanis, D. Tzovaras","doi":"10.1145/3139367.3139409","DOIUrl":"https://doi.org/10.1145/3139367.3139409","url":null,"abstract":"In this paper a comparative study of CPU power models that have been widely used in cloud simulation environments is conducted. Generic CPU power models for the estimation of the energy consumption of CPU servers have been proposed in cloud simulation frameworks, since estimations of the energy consumption of cloud computing infrastructures can be obtained through simulation experimentation. The main characteristic of these models is that they have low computational complexity and can be applied to a wide range of modern CPU servers. A recently proposed CPU power consumption model, based on a third degree polynomial, is examined and evaluated. A comparative study based on available CPU power measurements of CPU servers, obtained from SPEC benchmark, is conducted. Additionally, experimentation on three CPU servers is performed and power measurements are obtained for various workloads in order evaluate the estimations of the different CPU power models.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130782217","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}
引用次数: 3
Parallel Multi-Projection type methods on hybrid CPU/MIC cluster CPU/MIC混合集群的并行多投影方法
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139395
B. E. Moutafis, C. Filelis-Papadopoulos, P. Kyziropoulos, G. Gravvanis
{"title":"Parallel Multi-Projection type methods on hybrid CPU/MIC cluster","authors":"B. E. Moutafis, C. Filelis-Papadopoulos, P. Kyziropoulos, G. Gravvanis","doi":"10.1145/3139367.3139395","DOIUrl":"https://doi.org/10.1145/3139367.3139395","url":null,"abstract":"Many problems occurring in various scientific fields require the efficient solution of large sparse linear systems derived from the discretization of partial differential equations. Preconditioned Krylov subspace iterative methods based on domain decomposition techniques are suitable for solving large sparse linear systems on parallel systems. A parallel preconditioned iterative method in conjunction with semi-aggregation based algebraic domain decomposition method for symmetric sparse linear systems is presented. The proposed method is designed for distributed memory systems with multicore nodes, equipped with many integrated core architecture co-processors (Intel© Xeon Phi™). Utilizing the MIC architecture co-processors, concurrently with existing CPUs, for solving the local linear systems results in accelerating the solution process. Moreover, for large number for subdomains the proposed parallel scheme has improved convergence behavior. The convergence behavior and the scalability of the proposed scheme are examined and numerical results are given.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114315529","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}
引用次数: 1
Enabling Crowd-sourcing-based Privacy Risk Assessment in EU: the Privacy Flag Project 在欧盟实现基于众包的隐私风险评估:隐私标志项目
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139417
I. Chochliouros, S. Ziegler, L. Bolognini, N. Alonistioti, M. Stamatelatos, Panagiotis Kontopoulos, G. Mourikas, V. Vlachos, N. Gligoric, Marita Holst
{"title":"Enabling Crowd-sourcing-based Privacy Risk Assessment in EU: the Privacy Flag Project","authors":"I. Chochliouros, S. Ziegler, L. Bolognini, N. Alonistioti, M. Stamatelatos, Panagiotis Kontopoulos, G. Mourikas, V. Vlachos, N. Gligoric, Marita Holst","doi":"10.1145/3139367.3139417","DOIUrl":"https://doi.org/10.1145/3139367.3139417","url":null,"abstract":"Personal data have become merchandisable asset encouraging stakeholders to collect and trade them without end-user's awareness and acceptance. Although EU is adapting the legal framework, the extent of applications most of which are developed from outside the EU jurisdiction, strongly limit the possibility to effectively impose a privacy-protection framework globally. The Privacy Flag project researches and combines the potential of crowdsourcing, ICT technologies and legal expertise for enabling citizens monitoring and controlling their privacy1.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116511197","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}
引用次数: 2
Personalized Learning Pathways using semantic web rules 使用语义网规则的个性化学习路径
Proceedings of the 21st Pan-Hellenic Conference on Informatics Pub Date : 2017-09-28 DOI: 10.1145/3139367.3139404
Omiros Iatrellis, A. Kameas, P. Fitsilis
{"title":"Personalized Learning Pathways using semantic web rules","authors":"Omiros Iatrellis, A. Kameas, P. Fitsilis","doi":"10.1145/3139367.3139404","DOIUrl":"https://doi.org/10.1145/3139367.3139404","url":null,"abstract":"Information technology has the potential to greatly improve the quality of services offered by educational institutions. Personalized learning requires adaptive learning schemes since the student status and conditions inside an institution constantly change. In this paper, we present the EDUC8 (EDUCATE) system, which aims at providing a new approach concerning real-time personalization and adaptation of learning business processes. The EDUC8 system consists of a learning process execution engine supported by a semantic framework, which is based on an ontology enclosing the knowledge and the information and provides decisions and recommendations for the next steps of the learning process. Moreover, the results of the rule-set execution may create new objects that will be stored in the ontology as new knowledge1.","PeriodicalId":436862,"journal":{"name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115964563","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}
引用次数: 5
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