The Piraeus University of Applied science was established by a special law in 1976 from the merger of the Anastasiadis School, founded in 1947, and the Sivitanidios School founded in 1957. The institution provides a high level of technological education combined with applied research in selected areas. The TEI Piraeus reserves standing partnerships with other domestic and foreign educational and research institutions in order to continuously improve the level of study. The Foundation also participates in several European Union programs for international cooperation and dissemination of knowledge. Wikipedia.
Kaldellis J.K.,Technological Educational Institute of Piraeus
Energy Policy | Year: 2011
After a long stagnating period during the second half of the 1990s, the market of wind energy in Greece was described by remarkable but unstable growth rates that resulted in the operation of 1. GW of wind power by the end of 2009. Still though, penetration of wind energy is not the one anticipated. On the other hand, national targets regarding the Renewable Energy Sources' (RES) contribution and existence of excellent wind potential areas across Greece challenge new wind energy investments. Acknowledging the unsteady development rates of wind power in Greece, efficiency of the State support mechanisms is currently investigated. Based on an analytical evaluation model, the investigation undertaken is extended to provide a detailed cost-benefit analysis of several wind energy case studies, including mainland and island applications as well as comparison with both conventional power stations and photovoltaic plants. For this purpose, the financial support provided by the State is directly compared with benefits accruing from the operation of wind parks, considering also the avoidance of social costs deriving from thermal power stations. Based on the results obtained, the beneficial characteristics of wind energy applications for the Greek society are clearly demonstrated, especially in the case of non-interconnected island grids. © 2011 Elsevier Ltd.
Miridakis N.I.,University of Piraeus |
Miridakis N.I.,Technological Educational Institute of Piraeus |
Vergados D.D.,University of Piraeus
IEEE Communications Surveys and Tutorials | Year: 2013
Interference plays a crucial role for performance degradation in communication networks nowadays. An appealing approach to interference avoidance is the Interference Cancellation (IC) methodology. Particularly, the Successive IC (SIC) method represents the most effective IC-based reception technique in terms of Bit-Error-Rate (BER) performance and, thus, yielding to the overall system robustness. Moreover, SIC in conjunction with Orthogonal Frequency Division Multiplexing (OFDM), in the context of SIC-OFDM, is shown to approach the Shannon capacity when single-antenna infrastructures are applied while this capacity limit can be further extended with the aid of multiple antennas. Recently, SIC-based reception has studied for Orthogonal Frequency and Code Division Multiplexing or (spread-OFDM systems), namely OFCDM. Such systems provide extremely high error resilience and robustness, especially in multi-user environments. In this paper, we present a comprehensive survey on the performance of SIC for single- and multiple-antenna OFDM and spread OFDM (OFCDM) systems. Thereby, we focus on all the possible OFDM formats that have been developed so far. We study the performance of SIC by examining closely two major aspects, namely the BER performance and the computational complexity of the reception process, thus striving for the provision and optimization of SIC. Our main objective is to point out the state-of-the-art on research activity for SIC-OF(C)DM systems, applied on a variety of well-known network implementations, such as cellular, ad hoc and infrastructure-based platforms. Furthermore, we introduce a Performance-Complexity Tradeoff (PCT) in order to indicate the contribution of the approaches studied in this paper. Finally, we provide analytical performance comparison tables regarding to the surveyed techniques with respect to the PCT level. © 1998-2012 IEEE.
Kaldellis J.K.,Technological Educational Institute of Piraeus
Renewable Energy | Year: 2010
The vast growth of the mobile telecommunication (T/C) sector during the recent years has led to the extension of the respective networks even to the most remote areas. Many of these areas, however, often lack electricity grid supply and as a result installation of energy autonomous T/C stations, usually based on diesel-oil electricity generation, is essential. On the other hand, technological developments and considerable procurement cost reduction of photovoltaics (PVs) encourage also the use of PV stand-alone configurations, as an alternative energy solution for the operation of these remote T/C stations. Instead of using PV-battery configurations alone, contribution of a diesel engine in terms of moderate fuel consumption may downsize the system and improve its economic performance. In this context, an optimum sizing methodology currently developed is used to determine the dimensions of such an autonomous hybrid system, based on the criterion of minimum initial cost. The developed methodology is accordingly applied to a representative Greek area of high solar potential under different scenarios of fuel consumption and panels' tilt angle. From the results obtained, the proposed hybrid power station appears to be one of the most attractive energy solutions for the support of remote T/C stations, providing increased levels of reliability and presenting low maintenance needs. © 2010 Elsevier Ltd.
Besseris G.J.,Technological Educational Institute of Piraeus
PLoS ONE | Year: 2013
Data screening is an indispensable phase in initiating the scientific discovery process. Fractional factorial designs offer quick and economical options for engineering highly-dense structured datasets. Maximum information content is harvested when a selected fractional factorial scheme is driven to saturation while data gathering is suppressed to no replication. A novel multi-factorial profiler is presented that allows screening of saturated-unreplicated designs by decomposing the examined response to its constituent contributions. Partial effects are sliced off systematically from the investigated response to form individual contrasts using simple robust measures. By isolating each time the disturbance attributed solely to a single controlling factor, the Wilcoxon-Mann-Whitney rank stochastics are employed to assign significance. We demonstrate that the proposed profiler possesses its own self-checking mechanism for detecting a potential influence due to fluctuations attributed to the remaining unexplainable error. Main benefits of the method are: 1) easy to grasp, 2) well-explained test-power properties, 3) distribution-free, 4) sparsity-free, 5) calibration-free, 6) simulation-free, 7) easy to implement, and 8) expanded usability to any type and size of multi-factorial screening designs. The method is elucidated with a benchmarked profiling effort for a water filtration process. © 2013 George Besseris.
Agency: Cordis | Branch: H2020 | Program: MSCA-RISE | Phase: MSCA-RISE-2014 | Award Amount: 1.21M | Year: 2015
The new field of science dealing with implementation of electronics to textiles in combination with informatics is known as e-textiles. This project proposal leads to knowledge transfer among partners in order to develop innovative e-textile products for interactive protective clothing and footwear using welding technologies by bringing experts from different countries, sectors and disciplines together to focus their effort in innovative e-textile product designs. Within this context, the project aims to develop novel e-textile structures including transmission lines, sensors, actuators, microprocessors, personalized algorithms, on-body computing and user feedbacks in order to make a breakthrough towards development of interactive protective clothing and footwear that able to monitor health, activity, position of the user in the environmental risky situations, the welding technologies will be mainly used in three concepts: I. Designing of transmission lines of e-textile structures; II. Integration of electronic elements (different sensors, actuators, microprocessors, data transmission and power supply systems) to textile structures; III. Design and development of whole e-textile system for protective clothing applications including interactive protective garments and shoes. Thus, project draws on strong transitions of textiles, electronics and informatics researches and is internationally acknowledged for its pioneering contributions to e-textile researches through the industry-academia cooperation. This will not only help to develop future generations of entrepreneurial researchers more capable of contributing effectively to the knowledge-based e-textile research area, within and between public and private sectors, but also add to the intersectorial and trans-national employability of these researchers as well as to the attraction of young people to a research career on textile/electronics areas.