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Auflistung nach Autor:in "Karatzas, Kostas"

1 - 10 von 16
  • Konferenzbeitrag
    A Computational Intelligence Approach to Diabetes Mellitus and Air Quality Levels in Thessaloniki, Greece
    (Advances and New Trends in Environmental Informatics - Stability, Continuity, Innovation, 2016) Karatzas, Kostas; Dourliou, Vassiliki; Kakaletsis, Nikolaos; Katsifarakis, Nikolaos; Savopoulos, Christos; Hatzitolios, Apostolos I.
  • Konferenzbeitrag
    Citizen-Centred Information Dissemination with Multimodal Information Channels
    (Sustainability in the Information Society, 2001) Johansen, Per Henrik; Karatzas, Kostas; Lindberg, Jon Eric; Peinel, Gertraud; Rose, Thomas
    Citizens call for timely and high-quality environmental information for reasons of comfort and health care. This interest recommends an easy-to-understand and easy-toaccess presentation of such information. Rather than presenting raw data in an extensive fashion, one ought to engineer customisable information services, that can be tailored to individual user groups, be it for reasons of content or be it for reasons of citizen's reachability. InAPNEE, we have been designing information services that draw upon various information channels, i.e. mobile-technologies, interactive portals for the Internet, as well as street panels for municipality usage scenarios. In a nutshell, the APNEEsystem promotes user-friendly information management and dissemination via multiple information channels, and can be applied in multiple information domains or be part of relevant applications or service back bones. Based on such high quality dissemination services, even environmental information will turn into an attractive product once perceived and provided as indicators for emerging interests of citizens towards levels of comfort.
  • Konferenzbeitrag
    Citizen-oriented Environmental Information Services: Usage and Impact
    (Informatics for Environmental Protection - Networking Environmental Information, 2005) Karatzas, Kostas; Endregard, Geir; Fløisand, Inga
    Citizens are interested in making use of EI services that allow them to have a better overview of the quality of the environment they live in. In addition, such services support environmental awareness and advance the understanding concerning the result that everyday human activity and tasks have to the quality of human life. Yet, the lack of sufficient EI services being made available to citizens, poses difficulties when one needs to draw certain qualitative or quantitative conclusions concerning their usage and impact. An additional difficulty results from the complexity of the human behaviour and the parameters influencing it, as part of the approach that one needs to apply when trying to study changes in human behaviour as resulting from the usage of contemporary electronic EI services. In the frame of the present paper, information concerning the usage, content variation and perception of air quality related, stateof- the-art, electronic information services, are presented, on the basis of the APNEE-TU project outcomes. For this purpose, information resulting from the field trials of certain EI services is used. Conclusions are drawn concerning the concept, the content and the acceptance of such services.
  • Konferenzbeitrag
    Data Mining Air Quality Data for Athens, Greece
    (Managing Environmental Knowledge, 2006) Efraimidou, Melina; Kanaki, Maria; Athanasiadis, Ioannis; Mitkas, Pericles; Karatzas, Kostas
    Urban air quality management and information systems are required to include advanced capabilities of quick, effective and easy to operate environmental data analysis applications, for information extraction and analysis and for the support of decision making. These systems are based on the need of city authorities and national governments to establish a framework which enables them to take actions, in order to ensure that air quality is improved and relevant standards are maintained in urban areas. In this context, quantitative data-driven decision support models are challenged by the difficulties in handling dynamic and uncertain features of real-world environmental systems. In addition, conditions for environmental management keep changing with time, demanding periodically updated decision support. These properties can be realized by learning from environmental data, using knowledge discovery techniques. In the present paper, data mining techniques are applied for data analysis and for the construction of forecasting modules towards decision making, on the basis of selected air quality information for Athens, Greece. Conclusions are drawn concerning the performance of algorithms, and for the research to be conducted in the future.
  • Konferenzbeitrag
    ENV-e-CITY Environmentally Viable Electronic City
    (Environmental Communication in the Information Society - Proceedings of the 16th Conference, 2002) Moussiopoulos, Nicolas; Bøhler, Trond; Fedra, Kurt; Friedrich, Rainer; Karatzas, Kostas; Karppinen, Ari; Kraggerud, Per Haavard; Kukkonen, Jaakko; Larssen, Steinar; de Leeuw, Frank; Lohmeyer, Achim; Peinel, Gertraud; Pulles, Tinus; Reis, Stefan; Rose, Thomas; van der Hout, Dick
    The objective of project ENV-e-CITY is to develop an on-line application for environmental information related services. The e-content domain extends over four application areas: air emission, air quality, topography and meteorology. The application framework to be developed includes metadata structures for all application areas, export and import filters, interfaces and various e-content basic services. The user community of the platform envisaged consists of city authorities, consultants involved in environmental impact assessment studies and citizens desiring valid information on the state of the environment. An electronic market place for the e-content itself and the services is also envisaged.
  • Konferenzbeitrag
    Environmental Informatics for supporting the enlargement of the European Union
    (Sh@ring – EnviroInfo 2004, 2004) Karatzas, Kostas
    The European Union has expanded from the initial six countries that signed the Treaty of Paris in 1951, establishing the European Coal and Steel Community, to 15 member countries until 1997, when it was decided by the European Council to initiate the process of enlargement to a further 13 countries. The latter resulted in the largest change of the EU, in terms of the number of countries involved, their area, population, and prosperity, as well as their different traditions and cultures. In addition, it should be noted that, according to the criteria for accession to the EU (designated by the European Council in 1993), the new member states should incorporate within their legal system the relevant EU legislation, including, of course directives related to the environmental sector. This poses a considerable challenge from the policy making point of view, as it suggests that the EU should become a harmonized entity within a certain time frame, concerning environmental management and protection, while in addition promoting the improvement of the quality of life for citizens. Moreover, environmental improvement is directly linked with financial development, and is considered to be a prerequisite for the formulation of a health monetary antagonistic “environment”. In this paper we discuss how the application of Environmental Informatics principles and methods may support: a) the improvement in procedures related to the implementation of common EU management and protection legislation and practices b) enriched participation of citizens on environment and quality of life related decision making c) horizontal environmental policy integration and sharing within the member states. d) better business opportunities The discussion is made on the basis “real world applications”, using air quality modeling as the environmental domain of interest.
  • Konferenzbeitrag
    Environmental Informatics: Concepts and Definitions
    (The Information Society and Enlargement of the European Union, 2003) Karatzas, Kostas
    The appropriate mapping of environmental knowledge to management, information and decision making systems is an issue of growing interest during the last years. The fusion of IT-based system methods and tools to environmental management problems and applications has led to a general “consensus” in terms of the advantages occurring from the combination of software and environmental engineering. Yet, the interpretation of these developments and of the corresponding progress made so far varies between members of the scientific community, reflecting the different views and “points of departure” in the way that an environmental management and decision making problem is interpreted and solved. In the current paper, the concept of Environmental Informatics as an “effective” bridge between the environmental and software engineering domains is being investigated and discussed, making use of examples related to various Urban Air Quality Management and Information System components.
  • Konferenzbeitrag
    Environmental Information Perception, Analysis and Communication with the Aid of Natural Language Processing
    (Environmental Informatics and Systems Research, 2007) Trausan-Matu, Stefan; Karatzas, Kostas; Chiru, Costin
    The perception of environmental information (EI) and the way that it is structured within Environmental Information Portals (EIP) are of major importance for the design of such information systems. The present paper investigates the concepts of air quality perception and applies natural language processing for developing a framework of concepts, phrases, patterns, collocations, and metaphors around an air quality ontology. The results reveal the frequency of appearance and the relations between basic terms, thus reflecting domain perception, and the collocations that underline ontology structures. It is therefore made evident that natural language processing may be used for the analysis of EI perception and communication and for supporting the design of EI systems.
  • Konferenzbeitrag
    Environmental Information Portals, Services, and Retrieval Systems
    (Informatics for Environmental Protection - Networking Environmental Information, 2005) Bassoukos, Anastassios; Karatzas, Kostas; Kelemis, Athanassios
    Environmental Information (EI) accounts for the majority of public sector information in Europe, and poses a considerable potential for added value services via its customisation and re-use. One of the challenges that one faces concerning EI is to find it, categorise it, and make it available via contemporary electronic means, and especially the Internet. An additional challenge is the mapping of environmental knowledge needs to environmental systems characteristics and functions, especially when it comes to the support of business sectors that require usage of specific EI categories (like the alternative energy business sector, the life cycle analysis and assessment sector, etc). In the frame of these needs, web-based methods and technologies are presented in this paper, as developed and applied for addressing the needs of “real world”, EI-based, internet systems.
  • Konferenzbeitrag
    Environmental Services and Data Brokerage Portal: ENV-e-CITY in Action
    (The Information Society and Enlargement of the European Union, 2003) Moussiopoulos, Nicolas; Karatzas, Kostas; Endregard, Geir; Fedra, Kurt; Friedrich, Rainer; Johansen, Per Henrik; Kalognomou, Liana; Karppinen, Ari; Kraggerud, Per Haavard; Kukkonen, Jaakko; Larssen, Steinar; de Leeuw, Frank; Lohmeyer, Achim; Naneris, Chris; Nicklass, Daniel; Papaioannou, Giannis; Peinel, Gertraud; Pulles, Tinus; Reis, Stefan; Rose, Thomas; Sedlmayr, Martin; van den Hout, Dick
    ENV-e-CITY is a European Commission supported e-content project that aims to develop an internet-based service for environmental information related applications. The motivation of this project lies in the need of European cities to perform assessments for complying with the EU environmental legislation, as well as the requirement for efficient environmental impact assessments. The e-content domain considered extends over four environmental application areas: air emission, air quality, topography, and meteorology. The application framework includes meta-data structures for these domains, export and import filters, interfaces and typical e-content services. The user community of the platform envisaged consists of city authorities, consultants involved in environmental impact assessment studies as well as citizens desiring valid information on the state of the atmospheric environment. An initial set of electronic information services is currently under development and will be demonstrated on the basis of the various user categories.