2010 14th Panhellenic Conference on Informatics

In this paper the planning and development of a backend software for a Electronic Health Record (eHR) Management System is presented. The system is based on the well-known Google's Android open platform, that offers easy networking procedures and low design complexity. The aim of this work is to present the system's client, which operates on a mobile device (Android based) and acquires data from t... View full abstract»

Modern aggressive types of malcode demonstrate that existing security applications are not able to neutralise them efficiently. We present a Large-Scale Early Warning System named PROTOS, which is able to gather intelligence from a large number of personal computers, acting as sensors, utilising their default security mechanisms and applications, to collect and analyse locally intercepted maliciou... View full abstract»

Remote healthcare monitoring has attracted the interest of many research projects during last years. The need to address the issue of ageing population has lead to the exploitation of modern communication and software technologies in this domain too. This is instigated by related technological evolutions such as the evolutions in sensor networks which can now support self organization. This paper ... View full abstract»

In the recent years, there is an extremely growing interest in the development of mobile information systems for museum visitors. Many of these systems utilize sensor technologies like HF RFIDs to provide an enhanced experience to the visitors. We explore the usage of UHF RFIDs to enhance museum visits and demonstrate a mobile application for delivering multimedia information to museum visitors. View full abstract»

Digital repositories are popular means for preserving, restoring, and indexing archaeological and cultural content. They provide the base for development of a fauna of related applications including virtual tours and data management. Common difficulties such as the ever changing software specifications from domain experts make this task challenging as the alterations of the database schema lead to... View full abstract»

Licensing dependencies among open source software (oss) packages reveal a lot about software compatibility relationships and the practicalities of oss licensing. There is, however, limited information on these in the literature. In this paper, we discuss various aspects of oss licensing, and we present an empirical study on FreeBSD ports collections concerning their licensing dependencies, in an a... View full abstract»

The presence of software and middleware technologies based on open APIs and protocols for advanced service provision in telecoms is the main subject of this article. Specifically, the role and the trade-off between open APIs and Protocols, i.e. OSA/Parlay APIs, JAIN APIs and SIP, in modern telecoms are addressed. We present a technical implementation analysis, based on a call-related telecom servi... View full abstract»

With the advent of Web 2.0, an increasing number of web sites has started offering their data over the web in standard formats and exposed their functionality as APIs. A new type of applications has taken advantage of the new data and services available by mixing them, in order to generate new applications fast and efficiently, getting its name from its own architectural style: mashups. A set of a... View full abstract»

The purpose of this paper is to describe the significance of the Capability Maturity Model Integration framework for software development (CMMI-DEV) tailoring to several process requirements, through the use of software process improvement (SPI) methodologies. These methodologies take into account the factors that affect their implementation strategies and adapt CMMI-DEV to particular process circ... View full abstract»

Earlier studies suggest that educational institutions may further benefit from Learning Management Systems (LMSs) by generating reports regarding courses. That is, with the use of tools focus to assess student's paths into course content. This paper affirms that educational meaningful information can be extracted from LMS student logged data and presents a methodology on how such findings may assi... View full abstract»

The heterogeneity of spatial planning data is a well known problem that admittedly limits its use and provokes numerous difficulties to planners, investors as well as decision makers. Spatial planning is confronted with a huge problem concerning the diversity in data collection, storing, processing and provision. These challenges constitute the main concern of the Infrastructure for Spatial Inform... View full abstract»

We use meteorological data from the European Centre for Medium-Range Weather Forecasts (ECMWF) and the Meteorological Station of Mikra (Thessaloniki, Greece) as input to five data mining algorithms with the aim to build classification models for the prediction of the occurrence of precipitation in the station. We focus our study on the effect the selection of the training set has on the performanc... View full abstract»

Hadoop is a fault tolerant Java framework that supports data distribution and process parallelization using commodity hardware. Based on the provided scalability and the independence of task execution, we combined Hadoop with crawling techniques to implement various applications that deal with large amount of data. Our experiments show that Hadoop is a very useful and trustworthy tool for creating... View full abstract»

This paper studies the problem of cluster detection in undirected graphs by using transitive node similarity methods. Well-defined semi-metric measures are proposed to compute the similarity between the nodes of the graph, and the clustering is based on the resulted similarity values. The proposed algorithm has three major steps. In the first step, which is optional, a ranking of all the nodes of ... View full abstract»

Prepositional phrase attachment is a major disambiguation problem when it's about parsing natural language, for many languages. In this paper a low resources policy is proposed using supervised machine learning algorithms in order to resolve the disambiguation problem of Prepositional phrase attachment in Modern Greek. It is a first attempt to resolve Prepositional phrase attachment in Modern Gree... View full abstract»