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2012 16th Panhellenic Conference on Informatics最新文献

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Technological Characteristics and Tools for Web Media Companies in Greece 希腊网络媒体公司的技术特点和工具
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.20
N. Antonopoulos, A. Veglis
{"title":"Technological Characteristics and Tools for Web Media Companies in Greece","authors":"N. Antonopoulos, A. Veglis","doi":"10.1109/PCi.2012.20","DOIUrl":"https://doi.org/10.1109/PCi.2012.20","url":null,"abstract":"This paper discusses the technological characteristics and tools of web media companies in Greece. The study is comprised of twenty five web sites with the highest rank in Greece according to google rank and alexa.com. Thirty two criteria that evaluate the services, the satisfaction of the user and the quality of the information are being studied. The results of the study outline the characteristics and the tools of Greek web media companies and indicate possible improvements.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133308532","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
A Stegosystem with Advanced Security Features - Simulated in Matlab 具有高级安全特性的隐写系统- Matlab仿真
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.55
A. Andreatos, A. Leros
{"title":"A Stegosystem with Advanced Security Features - Simulated in Matlab","authors":"A. Andreatos, A. Leros","doi":"10.1109/PCi.2012.55","DOIUrl":"https://doi.org/10.1109/PCi.2012.55","url":null,"abstract":"This paper presents a Steganography Telecom System for data cryptography, based on a Chua's Circuit Chaotic Noise Generator. The cipher text is randomly distributed on a cover image in a stochastic mode. To achieve this innovative feature, we have used a pseudo-random number generator. The whole system presents advanced security features and it is simulated in Matlab. Simulation results which demonstrate the proof of concept are presented.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133205662","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
Wireless Sensor Networking, Automation Technologies and Machine to Machine Developments on the Path to the Internet of Things 无线传感器网络、自动化技术和物联网道路上的机器对机器发展
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.64
E. Gazis, K. Sasloglou, Nikolaos Frangiadakis, Panayotis Kikiras
{"title":"Wireless Sensor Networking, Automation Technologies and Machine to Machine Developments on the Path to the Internet of Things","authors":"E. Gazis, K. Sasloglou, Nikolaos Frangiadakis, Panayotis Kikiras","doi":"10.1109/PCi.2012.64","DOIUrl":"https://doi.org/10.1109/PCi.2012.64","url":null,"abstract":"The Internet of Things (IoT) has been heralded as the next major development to be realized throughout the Internet portfolio of technologies. IoT is understood to bring along multiple technological challenges. These should not be considered in isolation, since IoT is characterized by the introduction of machine to machine applications with no or minimal human involvement, and the high pervasiveness of the technological artefacts realizing it. The technological developments shaping the IoT vision are manifesting in multiple economic sectors, including computing, telecommunications, construction and logistics---to name a few. Among the various technological developments supporting the IoT, wireless networking, embedded computing and scalable computation through virtualization are considered the key driving forces for transforming the IoT vision into reality. Herein we present the IoT vision and elaborate on key technological developments in these pivotal thematic areas. We conclude the paper with insights drawn from this survey of technological developments and sketch out directions for future research.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127817125","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: 23
An Analysis of Privacy-Related Strategic Choices of Buyers and Sellers in E-commerce Transactions 电子商务交易中买卖双方隐私相关策略选择分析
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.25
S. Kokolakis, K. Anastasopoulou, Maria Karyda
{"title":"An Analysis of Privacy-Related Strategic Choices of Buyers and Sellers in E-commerce Transactions","authors":"S. Kokolakis, K. Anastasopoulou, Maria Karyda","doi":"10.1109/PCi.2012.25","DOIUrl":"https://doi.org/10.1109/PCi.2012.25","url":null,"abstract":"E-commerce transactions, in addition to the exchange of goods and services for payment, often entail an indirect transaction, where personal data are exchanged for better services or lower prices. This paper analyses buyer's and seller's privacy-related strategic choices in e-commerce transactions through game theory. We demonstrate how game theory can explain why buyers mistrust internet privacy policies and relevant technologies (e.g. P3P) and sellers hesitate to invest in data protection.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129874310","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
Performance Evaluation of 3D Stereo Video Streaming over IP Networks IP网络上3D立体视频流的性能评估
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.10
A. Kordelas, T. Dagiuklas, I. Politis, S. Kotsopoulos
{"title":"Performance Evaluation of 3D Stereo Video Streaming over IP Networks","authors":"A. Kordelas, T. Dagiuklas, I. Politis, S. Kotsopoulos","doi":"10.1109/PCi.2012.10","DOIUrl":"https://doi.org/10.1109/PCi.2012.10","url":null,"abstract":"This paper presents the performance evaluation results of 3D Video Streaming using a H.264/MVC experimental platform. Particular attention has been given to the evaluation of different video bit stream RTP packetization modes, namely Single NAL Unit, Aggregation Packet and Fragmentation Units, by measuring overhead, number of decoded frames and perceived PSNR for both base and non base view under different network conditions. Extensive test bed experiments indicate that the non-base view is more sensitive to packet loss, due to its coding dependency from the base view.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126401482","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
The Deletion Operation in xBR-Trees xbr -树中的删除操作
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.31
George Roumelis, M. Vassilakopoulos, A. Corral
{"title":"The Deletion Operation in xBR-Trees","authors":"George Roumelis, M. Vassilakopoulos, A. Corral","doi":"10.1109/PCi.2012.31","DOIUrl":"https://doi.org/10.1109/PCi.2012.31","url":null,"abstract":"In order to design a spatial index, the most important operations are: insertion, deletion and search. We focus on the deletion operation over the xBR-tree, a spatial data secondary memory structure that belongs to the Quad tree family. The algorithm of handling deletions is presented, taking into account that the deletion of a leaf item may cause entries deletions from internal nodes. The well-known merging technique is applied, to retain the efficiency of the xBR-tree.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131606352","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
Cellular Automata on FPGAs for Image Processing 基于fpga的元胞自动机图像处理
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCI.2012.70
I. Katis, G. Sirakoulis
{"title":"Cellular Automata on FPGAs for Image Processing","authors":"I. Katis, G. Sirakoulis","doi":"10.1109/PCI.2012.70","DOIUrl":"https://doi.org/10.1109/PCI.2012.70","url":null,"abstract":"Cellular automata (CA) are computational models of physical systems, where space and time are discrete and interactions are local. Specific CA attributes make them ideal for designing complex electronic circuits for the automated image processing. In terms of circuit design and layout, ease of mask generation, silicon-area utilization, and maximization of clock speed, CAs are perhaps one of the most suitable computational structures for hardware realization. In this paper, we present a computational tool designed to create specialized FPGAs that achieve automated image processing such as noise filtering, edge thinning and convex hull detection. The user of the tool specifies the initial parameters and the automation design tool returns the VHDL code needed for the dedicated electronic circuit. Testing the tool using various initial conditions showed that the corresponding CA algorithms have been successfully implemented into hardware.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126847933","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: 4
Semantic Categorization of Web Services Based on Feature Space Transformation 基于特征空间变换的Web服务语义分类
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.41
Efthimia Mavridou, G. Hassapis, Dionisis D. Kehagias, D. Tzovaras
{"title":"Semantic Categorization of Web Services Based on Feature Space Transformation","authors":"Efthimia Mavridou, G. Hassapis, Dionisis D. Kehagias, D. Tzovaras","doi":"10.1109/PCi.2012.41","DOIUrl":"https://doi.org/10.1109/PCi.2012.41","url":null,"abstract":"Automatic semantic web service annotation mechanisms are required for enabling more efficient and accurate search and discovery of services on the web. In this context new mechanisms are necessary for improving the overall accuracy of the semantic characterization process, preserving the overall performance at an acceptable level. Existing semantic categorization mechanisms take into account all tokens that are included in web service description documents thus resulting in poor performing categorization tasks. This paper demonstrates how a significant improvement in performance can be achieved by applying the Bayes' theorem for transforming the feature space in order to decrease its dimension, without sacrificing prediction accuracy. Experimental evaluation of our approach with respect to other feature selection techniques shows that the former achieves better prediction accuracy, as well as performance when the categorization of a web service in an application domain is concerned.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"30 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115930943","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
Human Mobility Trace Acquisition and Social Interactions Monitoring for Business Intelligence Using Smartphones 基于智能手机的商业智能人类移动轨迹获取和社会互动监测
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCI.2012.9
A. Antoniou, E. Theodoridis, I. Chatzigiannakis, Georgios Mylonas
{"title":"Human Mobility Trace Acquisition and Social Interactions Monitoring for Business Intelligence Using Smartphones","authors":"A. Antoniou, E. Theodoridis, I. Chatzigiannakis, Georgios Mylonas","doi":"10.1109/PCI.2012.9","DOIUrl":"https://doi.org/10.1109/PCI.2012.9","url":null,"abstract":"Human mobility monitoring and respective traces are important for understanding human behavior, respective patterns and associated context. Such data can be potentially used in business intelligence-oriented systems, for providing added value commercial services or insight to internal enterprise procedures. At the same time, smart phones are rapidly becoming an indispensable tool for our everyday life, while their advanced networking and computing capabilities are increasingly being used as enablers for new applications. We discuss here a system using a stable computing and networking infrastructure along with smart phone applications, based on commodity technologies, meant to be deployed rapidly and provide analytics almost in real-time for such aspects. We also discuss a related scenario in order to provide insight as to where our system could be used. We briefly present the deployment of our system in two settings, an office building and a research exhibition event, along with our experiences. Our findings show that it is feasible and efficient to deploy and operate our system relatively easy, producing meaningful data.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124200731","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
Measuring and Mining LMS Data 测量和挖掘LMS数据
2012 16th Panhellenic Conference on Informatics Pub Date : 2012-10-05 DOI: 10.1109/PCi.2012.49
I. Kazanidis, S. Valsamidis, Sotirios Kontogiannis, A. Karakos
{"title":"Measuring and Mining LMS Data","authors":"I. Kazanidis, S. Valsamidis, Sotirios Kontogiannis, A. Karakos","doi":"10.1109/PCi.2012.49","DOIUrl":"https://doi.org/10.1109/PCi.2012.49","url":null,"abstract":"Educational content quality and quantity is a crucial factor for the success of e-learning procedure. This study puts forward a proposal that enables the evaluation of online content and its usage by the learners. It proposes some new measures and metrics for content and course usage and investigates, through data mining techniques, the impact of users' online behavior to their performance as this is reflected by course grade. The proposed measures and metrics were used in the case study of a Greek university. They tracked both course content quantity and its corresponding usage which express user experience over the learning content. The results show that although many measures are related to higher grade, it is the duration of online study that mainly affects learners' final grade. Therefore an online platform may indicate students with low activity and send them additional messages tar on them to study more time the online course.","PeriodicalId":131195,"journal":{"name":"2012 16th Panhellenic Conference on Informatics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121518979","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: 6
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