Proceedings of the 19th Panhellenic Conference on Informatics最新文献_第3页

Under-sampling based on sparse data/parity patterns in STBC-OFDM environment STBC-OFDM环境下基于稀疏数据/奇偶校验模式的欠采样

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2802016

N. Petrellis

引用次数: 1

Heating schedule management approach through decentralized knowledge diffusion in the context of social internet of things 社会物联网背景下基于分散知识扩散的供热计划管理方法

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2802009

Panagiotis Bourelos, George Kousiouris, Orfefs Voutyras, T. Varvarigou

{"title":"Heating schedule management approach through decentralized knowledge diffusion in the context of social internet of things","authors":"Panagiotis Bourelos, George Kousiouris, Orfefs Voutyras, T. Varvarigou","doi":"10.1145/2801948.2802009","DOIUrl":"https://doi.org/10.1145/2801948.2802009","url":null,"abstract":"In the forefront of efforts to curb energy consumption and as a consequence decrease greenhouse emissions, cities as well as individuals, turn to the field of Smart Homes to optimize their heating schedules through IoT-enabled solutions. However in many cases efforts are focusing on algorithms and systems requiring large amounts of processing power and constant data availability to be effective. In this paper, an approach tailored to the constrained resources in the IoT domain is introduced that is based on the Social IoT paradigm, instead of centralized computational nodes. The framework enables Smart Home Gateways to seek solutions to their heating schedule needs through communication of actual observations with fellow homes rather than brute force calculations based on probabilistic models that may require centralized approaches. Using the provided IoT components of the COSMOS ecosystem, Smart Homes may run purpose-built applications that use stored Knowledge, communicate it throughout the Network of Things and act on it in ways which aid the end users in retrieving relevant solutions. Raspberry-based simulations indicate that this diffusion of Knowledge as well as the improvements and evaluations through feedback performed on it, allow for the creation of a lightweight and resource effective approach, on the problem of Heating Management.","PeriodicalId":305252,"journal":{"name":"Proceedings of the 19th Panhellenic Conference on Informatics","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123758120","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

Coherent optical wireless: realizing fiber-like connections out of thin air 相干光无线:在稀薄的空气中实现类似光纤的连接

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2802005

T. Kamalakis, P. Kanakis, A. Bogris

引用次数: 0

A collective awareness platform for energy efficient smart buildings 节能智能建筑的集体意识平台

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2801993

I. Chatzigiannakis, Dimitrios Amaxilatis, Spyros Livathinos

{"title":"A collective awareness platform for energy efficient smart buildings","authors":"I. Chatzigiannakis, Dimitrios Amaxilatis, Spyros Livathinos","doi":"10.1145/2801948.2801993","DOIUrl":"https://doi.org/10.1145/2801948.2801993","url":null,"abstract":"Building Energy Management Systems (BEMS) are mature computer-based systems that manage, control and monitor different building technical services (such as heating, lighting etc.) and the energy consumption of devices used by the building. In the recent years, significant efforts have been made towards the integration of sensor devices and embedded computing systems with the Internet, thus transforming BEMS into a new era of Internet Buildings. Smart buildings can learn and even anticipate the needs of a buildings' occupants, including their preferences for light, temperature and other services, resulting in energy savings through targeted supply. In this work we argue that in such future buildings, it will be simply infeasible to expect individuals to be aware of the full range of potentially relevant possibilities and be able to pull them together manually. We thus propose a system that proactively guides users' interactions based on their preferences and constraints. We develop a collective awareness platform where the control of the smart building is balanced between the people and machines. We present the basic design principles, the implementation details and our experimental findings after evaluating our system in a real-world testbed.","PeriodicalId":305252,"journal":{"name":"Proceedings of the 19th Panhellenic Conference on Informatics","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122828637","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: 7

Ranking tokens with class label frequencies for medical article classification 用类标签频率对标记进行排序，用于医学物品分类

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2802022

K. Fragos, C. Skourlas

引用次数: 2

A simulation platform for evaluating DoS attacks in wireless sensor networks 无线传感器网络DoS攻击评估仿真平台

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2801949

E. Darra, Christina Skouloudi, S. Katsikas

{"title":"A simulation platform for evaluating DoS attacks in wireless sensor networks","authors":"E. Darra, Christina Skouloudi, S. Katsikas","doi":"10.1145/2801948.2801949","DOIUrl":"https://doi.org/10.1145/2801948.2801949","url":null,"abstract":"Wireless Sensor Networks (WSNs) have been studied in depth for several decades. Their main role is to provide bridges between the virtual world of information technology and the real physical world. They promise unprecedented new abilities to observe and understand large-scale, real-world phenomena at a fine spatio-temporal resolution. However, this potential does not come for free; WSNs have been known to be vulnerable to several types of attacks aiming at compromising their security. Among these types, Denial of Service (DoS) attacks stand out, as most WSNs are vulnerable to such attacks, which affect the routing behavior. This paper introduces a simulation platform, based on the network simulator ns-2, that allows the in-depth study of DoS attacks against WSNs. We simulate and analyze the performance of routing protocols for WSNs using a scenario-based experiment, in order to analyze the network's behavior under all the simulated attacks, namely Blackhole, Flooding, Rushing and Selective Forwarding. The analysis involves several network characteristics and is aimed towards identifying easily measured features that can be used for efficiently detecting and classifying DoS attacks in WSNs.","PeriodicalId":305252,"journal":{"name":"Proceedings of the 19th Panhellenic Conference on Informatics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127099528","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

Performance-optimized pages' architecture, navigation and images techniques for JQuery mobile sites 针对 JQuery 移动网站的性能优化页面架构、导航和图像技术

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2801995

Andreas Gizas, Sotiris P. Christodoulou

引用次数: 0

Remote FPGA laboratory course development based on an open multimodal laboratory facility 基于开放式多模态实验室设施的远程FPGA实验课程开发

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2801950

V. Fotopoulos, Anastasios Fanariotis, T. Orphanoudakis, A. Skodras

引用次数: 8

On the numerical solution of the generalized dirichlet-neumann map for the 2D laplace equation using modified generic factored approximate sparse inverse preconditioning 用改进的一般因子近似稀疏逆预条件求解二维拉普拉斯方程的广义dirichlet-neumann映射

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2801991

E. G. Grylonakis, C. Filelis-Papadopoulos, G. Gravvanis

{"title":"On the numerical solution of the generalized dirichlet-neumann map for the 2D laplace equation using modified generic factored approximate sparse inverse preconditioning","authors":"E. G. Grylonakis, C. Filelis-Papadopoulos, G. Gravvanis","doi":"10.1145/2801948.2801991","DOIUrl":"https://doi.org/10.1145/2801948.2801991","url":null,"abstract":"Recently, a new transform method for solving boundary value problems for linear and integrable nonlinear Partial Differential Equations (PDEs) in two dimensions was proposed by A.S. Fokas. This method produces an analytic, integral representation of the solution in the complex k-plane along with a generalized Dirichlet-Neumann map. The key step of this approach is the solution of the global relation, an equation involving known information of the derivative of the solution, coupled with an unknown component of the same derivative on the boundary. This unified approach seeks a solution to this unknown component, without solving in the interior of the domain. The global relation can be solved analytically for several equations with simple boundary conditions, however for more complicated boundary value problems approximations are sought, based on numerical methods. For the numerical solution of the global relation, a collocation-type method was recently introduced. Hence, we consider the proposed method for the 2D Laplace equation in several regular convex polygons with an arbitrary number of edges. The linear system, resulting by the collocation-type method, was solved by the Explicit Preconditioned Generalized Minimum Residual restarted method in conjunction with the Modified Generic Factored Approximate Sparse Inverse matrix. Numerical results indicating the applicability and performance of the proposed preconditioning scheme are provided, along with discussions on the implementation details of the method.","PeriodicalId":305252,"journal":{"name":"Proceedings of the 19th Panhellenic Conference on Informatics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115379984","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

How an open learning environment affects the motivation of secondary and higher education students 开放的学习环境如何影响中学及高等教育学生的学习动机

Proceedings of the 19th Panhellenic Conference on Informatics Pub Date : 2015-10-01 DOI: 10.1145/2801948.2802002

M. Samarakou, E. Fylladitakis, D. Karolidis, A. Papadakis, P. Prentakis, G. Tsaganou

引用次数: 0