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Meliones</title> <meta name="description" content="Search results for: Apostolos Meliones"> <meta name="keywords" content="Apostolos Meliones"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Apostolos Meliones"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 13</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Apostolos Meliones</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13</span> User Requirements Analysis for the Development of Assistive Navigation Mobile Apps for Blind and Visually Impaired People</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Paraskevi%20Theodorou">Paraskevi Theodorou</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Meliones"> Apostolos Meliones</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the context of the development process of two assistive navigation mobile apps for blind and visually impaired people (BVI) an extensive qualitative analysis of the requirements of potential users has been conducted. The analysis was based on interviews with BVIs and aimed to elicit not only their needs with respect to autonomous navigation but also their preferences on specific features of the apps under development. The elicited requirements were structured into four main categories, namely, requirements concerning the capabilities, functionality and usability of the apps, as well as compatibility requirements with respect to other apps and services. The main categories were then further divided into nine sub-categories. This classification, along with its content, aims to become a useful tool for the researcher or the developer who is involved in the development of digital services for BVI. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=accessibility" title="accessibility">accessibility</a>, <a href="https://publications.waset.org/abstracts/search?q=assistive%20mobile%20apps" title=" assistive mobile apps"> assistive mobile apps</a>, <a href="https://publications.waset.org/abstracts/search?q=blind%20and%20visually%20impaired%20people" title=" blind and visually impaired people"> blind and visually impaired people</a>, <a href="https://publications.waset.org/abstracts/search?q=user%20requirements%20analysis" title=" user requirements analysis"> user requirements analysis</a> </p> <a href="https://publications.waset.org/abstracts/114395/user-requirements-analysis-for-the-development-of-assistive-navigation-mobile-apps-for-blind-and-visually-impaired-people" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/114395.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">123</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">12</span> E-Learning in Life-Long Learning: Best Practices from the University of the Aegean</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chryssi%20Vitsilaki">Chryssi Vitsilaki</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Kostas"> Apostolos Kostas</a>, <a href="https://publications.waset.org/abstracts/search?q=Ilias%20Efthymiou"> Ilias Efthymiou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents selected best practices on online learning and teaching derived from a novel and innovating Lifelong Learning program through e-Learning, which has during the last five years been set up at the University of the Aegean in Greece. The university, capitalizing on an award-winning, decade-long experience in e-learning and blended learning in undergraduate and postgraduate studies, recently expanded into continuous education and vocational training programs in various cutting-edge fields. So, in this article we present: (a) the academic structure/infrastructure which has been developed for the administrative, organizational and educational support of the e-Learning process, including training the trainers, (b) the mode of design and implementation based on a sound pedagogical framework of open and distance education, and (c) the key results of the assessment of the e-learning process by the participants, as they are used to feedback on continuous organizational and teaching improvement and quality control. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=distance%20education" title="distance education">distance education</a>, <a href="https://publications.waset.org/abstracts/search?q=e-learning" title=" e-learning"> e-learning</a>, <a href="https://publications.waset.org/abstracts/search?q=life-long%20programs" title=" life-long programs"> life-long programs</a>, <a href="https://publications.waset.org/abstracts/search?q=synchronous%2Fasynchronous%20learning" title=" synchronous/asynchronous learning"> synchronous/asynchronous learning</a> </p> <a href="https://publications.waset.org/abstracts/63528/e-learning-in-life-long-learning-best-practices-from-the-university-of-the-aegean" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63528.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">334</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">11</span> Impact of Ship Traffic to PM 2.5 and Particle Number Concentrations in Three Port-Cities of the Adriatic/Ionian Area</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Daniele%20Contini">Daniele Contini</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonio%20Donateo"> Antonio Donateo</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Gambaro"> Andrea Gambaro</a>, <a href="https://publications.waset.org/abstracts/search?q=Athanasios%20Argiriou"> Athanasios Argiriou</a>, <a href="https://publications.waset.org/abstracts/search?q=Dimitrios%20Melas"> Dimitrios Melas</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniela%20Cesari"> Daniela Cesari</a>, <a href="https://publications.waset.org/abstracts/search?q=Anastasia%20Poupkou"> Anastasia Poupkou</a>, <a href="https://publications.waset.org/abstracts/search?q=Athanasios%20Karagiannidis"> Athanasios Karagiannidis</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Tsakis"> Apostolos Tsakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Eva%20Merico"> Eva Merico</a>, <a href="https://publications.waset.org/abstracts/search?q=Rita%20Cesari"> Rita Cesari</a>, <a href="https://publications.waset.org/abstracts/search?q=Adelaide%20Dinoi"> Adelaide Dinoi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Emissions of atmospheric pollutants from ships and harbour activities are a growing concern at International level given their potential impacts on air quality and climate. These close-to-land emissions have potential impact on local communities in terms of air quality and health. Recent studies show that the impact of maritime traffic to atmospheric particulate matter concentrations in several coastal urban areas is comparable with the impact of road traffic of a medium size town. However, several different approaches have been used for these estimates making difficult a direct comparison of results. In this work an integrated approach based on emission inventories and dedicated measurement campaigns has been applied to give a comparable estimate of the impact of maritime traffic to PM2.5 and particle number concentrations in three major harbours of the Adriatic/Ionian Seas. The influences of local meteorology and of the logistic layout of the harbours are discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ship%20emissions" title="ship emissions">ship emissions</a>, <a href="https://publications.waset.org/abstracts/search?q=PM2.5" title=" PM2.5"> PM2.5</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20number%20concentrations" title=" particle number concentrations"> particle number concentrations</a>, <a href="https://publications.waset.org/abstracts/search?q=impact%20of%20shipping%20to%20atmospheric%20aerosol" title=" impact of shipping to atmospheric aerosol"> impact of shipping to atmospheric aerosol</a> </p> <a href="https://publications.waset.org/abstracts/18334/impact-of-ship-traffic-to-pm-25-and-particle-number-concentrations-in-three-port-cities-of-the-adriaticionian-area" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18334.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">753</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Coastalization and Urban Sprawl in the Mediterranean: Using High-Resolution Multi-Temporal Data to Identify Typologies of Spatial Development</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Lagarias">Apostolos Lagarias</a>, <a href="https://publications.waset.org/abstracts/search?q=Anastasia%20Stratigea"> Anastasia Stratigea</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Coastal urbanization is heavily affecting the Mediterranean, taking the form of linear urban sprawl along the coastal zone. This process is posing extreme pressure on ecosystems, leading to an unsustainable model of growth. The aim of this research is to analyze coastal urbanization patterns in the Mediterranean using High-resolution multi-temporal data provided by the Global Human Settlement Layer (GHSL) database. Methodology involves the estimation of a set of spatial metrics characterizing the density, aggregation/clustering and dispersion of built-up areas. As case study areas, the Spanish Coast and the Adriatic Italian Coast are examined. Coastalization profiles are examined and selected sub-areas massively affected by tourism development and suburbanization trends (Costa Blanca/Murcia, Costa del Sol, Puglia, Emilia-Romagna Coast) are analyzed and compared. Results show that there are considerable differences between the Spanish and the Italian typologies of spatial development, related to the land use structure and planning policies applied in each case. Monitoring and analyzing spatial patterns could inform integrated Mediterranean strategies for coastal areas and redirect spatial/environmental policies towards a more sustainable model of growth <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coastalization" title="coastalization">coastalization</a>, <a href="https://publications.waset.org/abstracts/search?q=Mediterranean" title=" Mediterranean"> Mediterranean</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-temporal" title=" multi-temporal"> multi-temporal</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20sprawl" title=" urban sprawl"> urban sprawl</a>, <a href="https://publications.waset.org/abstracts/search?q=spatial%20metrics" title=" spatial metrics"> spatial metrics</a> </p> <a href="https://publications.waset.org/abstracts/134375/coastalization-and-urban-sprawl-in-the-mediterranean-using-high-resolution-multi-temporal-data-to-identify-typologies-of-spatial-development" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134375.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">138</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">9</span> Evaluating the Performance of 28 EU Member Countries on Health2020: A Data Envelopment Analysis Evaluation of the Successful Implementation of Policies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elias%20K.%20Maragos">Elias K. Maragos</a>, <a href="https://publications.waset.org/abstracts/search?q=Petros%20E.%20Maravelakis"> Petros E. Maravelakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20I.%20Linardis"> Apostolos I. Linardis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Health2020 is a promising framework of policies provided by the World Health Organization (WHO) and aiming to diminish the health and well-being inequalities among the citizens of the European Union (EU) countries. The major demographic, social and environmental changes, in addition to the resent economic crisis prevent the unobstructed and successful implementation of this framework. The unemployment rates and the percentage of people at risk of poverty have increased among the citizens of EU countries. At the same time, the adopted fiscal, economic policies do not help governments to serve their social role and mitigate social and health inequalities. In those circumstances, there is a strong pressure to organize all health system resources efficiently and wisely. In order to provide a unified and value-based framework of valuation, we propose a valuation framework using data envelopment analysis (DEA) and dynamic DEA. We believe that the adopted methodology could provide a robust tool which can capture the degree of success with which policies have been implemented and is capable to determine which of the countries developed the requested policies efficiently and which of the countries have been lagged. Using the proposed methodology, we evaluated the performance of 28 EU member-countries in relation to the Health2020 peripheral targets. We adopted several versions of evaluation, measuring the effectiveness and the efficiency of EU countries from 2011 to 2016. Our results showed stability in technological changes and revealed a group of countries which were benchmarks in most of the years for the inefficient countries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DEA" title="DEA">DEA</a>, <a href="https://publications.waset.org/abstracts/search?q=Health2020" title=" Health2020"> Health2020</a>, <a href="https://publications.waset.org/abstracts/search?q=health%20inequalities" title=" health inequalities"> health inequalities</a>, <a href="https://publications.waset.org/abstracts/search?q=malmquist%20index" title=" malmquist index"> malmquist index</a>, <a href="https://publications.waset.org/abstracts/search?q=policies%20evaluation" title=" policies evaluation"> policies evaluation</a>, <a href="https://publications.waset.org/abstracts/search?q=well-being" title=" well-being"> well-being</a> </p> <a href="https://publications.waset.org/abstracts/105549/evaluating-the-performance-of-28-eu-member-countries-on-health2020-a-data-envelopment-analysis-evaluation-of-the-successful-implementation-of-policies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105549.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">143</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> A Semidefinite Model to Quantify Dynamic Forces in the Powertrain of Torque Regulated Bascule Bridge Machineries </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kodo%20Sektani">Kodo Sektani</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Tsouvalas"> Apostolos Tsouvalas</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrei%20Metrikine"> Andrei Metrikine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The reassessment of existing movable bridges in The Netherlands has created the need for acceptance/rejection criteria to assess whether the machineries are meet certain design demands. However, the existing design code defines a different limit state design, meant for new machineries which is based on a simple linear spring-mass model. Observations show that existing bridges do not confirm the model predictions. In fact, movable bridges are nonlinear systems consisting of mechanical components, such as, gears, electric motors and brakes. Next to that, each movable bridge is characterized by a unique set of parameters. However, in the existing code various variables that describe the physical characteristics of the bridge are neglected or replaced by partial factors. For instance, the damping ratio ζ, which is different for drawbridges compared to bascule bridges, is taken as a constant for all bridge types. In this paper, a model is developed that overcomes some of the limitations of existing modelling approaches to capture the dynamics of the powertrain of a class of bridge machineries First, a semidefinite dynamic model is proposed, which accounts for stiffness, damping, and some additional variables of the physical system, which are neglected by the code, such as nonlinear braking torques. The model gives an upper bound of the peak forces/torques occurring in the powertrain during emergency braking. Second, a discrete nonlinear dynamic model is discussed, with realistic motor torque characteristics during normal operation. This model succeeds to accurately predict the full time history of the occurred stress state of the opening and closing cycle for fatigue purposes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dynamics%20of%20movable%20bridges" title="Dynamics of movable bridges">Dynamics of movable bridges</a>, <a href="https://publications.waset.org/abstracts/search?q=Bridge%20machinery" title=" Bridge machinery"> Bridge machinery</a>, <a href="https://publications.waset.org/abstracts/search?q=Powertrains" title=" Powertrains"> Powertrains</a>, <a href="https://publications.waset.org/abstracts/search?q=Torque%20measurements" title=" Torque measurements"> Torque measurements</a> </p> <a href="https://publications.waset.org/abstracts/118589/a-semidefinite-model-to-quantify-dynamic-forces-in-the-powertrain-of-torque-regulated-bascule-bridge-machineries" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/118589.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">156</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> Classifying Affective States in Virtual Reality Environments Using Physiological Signals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Kalatzis">Apostolos Kalatzis</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashish%20Teotia"> Ashish Teotia</a>, <a href="https://publications.waset.org/abstracts/search?q=Vishnunarayan%20Girishan%20Prabhu"> Vishnunarayan Girishan Prabhu</a>, <a href="https://publications.waset.org/abstracts/search?q=Laura%20Stanley"> Laura Stanley</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Emotions are functional behaviors influenced by thoughts, stimuli, and other factors that induce neurophysiological changes in the human body. Understanding and classifying emotions are challenging as individuals have varying perceptions of their environments. Therefore, it is crucial that there are publicly available databases and virtual reality (VR) based environments that have been scientifically validated for assessing emotional classification. This study utilized two commercially available VR applications (Guided Meditation VR™ and Richie’s Plank Experience™) to induce acute stress and calm state among participants. Subjective and objective measures were collected to create a validated multimodal dataset and classification scheme for affective state classification. Participants’ subjective measures included the use of the Self-Assessment Manikin, emotional cards and 9 point Visual Analogue Scale for perceived stress, collected using a Virtual Reality Assessment Tool developed by our team. Participants’ objective measures included Electrocardiogram and Respiration data that were collected from 25 participants (15 M, 10 F, Mean = 22.28 4.92). The features extracted from these data included heart rate variability components and respiration rate, both of which were used to train two machine learning models. Subjective responses validated the efficacy of the VR applications in eliciting the two desired affective states; for classifying the affective states, a logistic regression (LR) and a support vector machine (SVM) with a linear kernel algorithm were developed. The LR outperformed the SVM and achieved 93.8%, 96.2%, 93.8% leave one subject out cross-validation accuracy, precision and recall, respectively. The VR assessment tool and data collected in this study are publicly available for other researchers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=affective%20computing" title="affective computing">affective computing</a>, <a href="https://publications.waset.org/abstracts/search?q=biosignals" title=" biosignals"> biosignals</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title=" machine learning"> machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20database" title=" stress database"> stress database</a> </p> <a href="https://publications.waset.org/abstracts/134317/classifying-affective-states-in-virtual-reality-environments-using-physiological-signals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134317.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Detection of Flood Prone Areas Using Multi Criteria Evaluation, Geographical Information Systems and Fuzzy Logic. The Ardas Basin Case</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vasileiou%20Apostolos">Vasileiou Apostolos</a>, <a href="https://publications.waset.org/abstracts/search?q=Theodosiou%20Chrysa"> Theodosiou Chrysa</a>, <a href="https://publications.waset.org/abstracts/search?q=Tsitroulis%20Ioannis"> Tsitroulis Ioannis</a>, <a href="https://publications.waset.org/abstracts/search?q=Maris%20Fotios"> Maris Fotios</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The severity of extreme phenomena is due to their ability to cause severe damage in a small amount of time. It has been observed that floods affect the greatest number of people and induce the biggest damage when compared to the total of annual natural disasters. The detection of potential flood-prone areas constitutes one of the fundamental components of the European Natural Disaster Management Policy, directly connected to the European Directive 2007/60. The aim of the present paper is to develop a new methodology that combines geographical information, fuzzy logic and multi-criteria evaluation methods so that the most vulnerable areas are defined. Therefore, ten factors related to geophysical, morphological, climatological/meteorological and hydrological characteristics of the basin were selected. Afterwards, two models were created to detect the areas pronest to flooding. The first model defined the gravitas of each factor using Analytical Hierarchy Process (AHP) and the final map of possible flood spots were created using GIS and Boolean Algebra. The second model made use of the fuzzy logic and GIS combination and a respective map was created. The application area of the aforementioned methodologies was in Ardas basin due to the frequent and important floods that have taken place these last years. Then, the results were compared to the already observed floods. The result analysis shows that both models can detect with great precision possible flood spots. As the fuzzy logic model is less time-consuming, it is considered the ideal model to apply to other areas. The said results are capable of contributing to the delineation of high risk areas and to the creation of successful management plans dealing with floods. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=analytical%20hierarchy%20process" title="analytical hierarchy process">analytical hierarchy process</a>, <a href="https://publications.waset.org/abstracts/search?q=flood%20prone%20areas" title=" flood prone areas"> flood prone areas</a>, <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20logic" title=" fuzzy logic"> fuzzy logic</a>, <a href="https://publications.waset.org/abstracts/search?q=geographic%20information%20system" title=" geographic information system"> geographic information system</a> </p> <a href="https://publications.waset.org/abstracts/37019/detection-of-flood-prone-areas-using-multi-criteria-evaluation-geographical-information-systems-and-fuzzy-logic-the-ardas-basin-case" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37019.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">379</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Hypersonic Propulsion Requirements for Sustained Hypersonic Flight for Air Transportation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=James%20Rate">James Rate</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Pesiridis"> Apostolos Pesiridis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the propulsion requirements required to achieve sustained hypersonic flight for commercial air transportation are evaluated. In addition, a design methodology is developed and used to determine the propulsive capabilities of both ramjet and scramjet engines. Twelve configurations are proposed for hypersonic flight using varying combinations of turbojet, turbofan, ramjet and scramjet engines. The optimal configuration was determined based on how well each of the configurations met the projected requirements for hypersonic commercial transport. The configurations were separated into four sub-configurations each comprising of three unique derivations. The first sub-configuration comprised four afterburning turbojets and either one or two ramjets idealised for Mach 5 cruise. The number of ramjets required was dependent on the thrust required to accelerate the vehicle from a speed where the turbojets cut out to Mach 5 cruise. The second comprised four afterburning turbojets and either one or two scramjets, similar to the first configuration. The third used four turbojets, one scramjet and one ramjet to aid acceleration from Mach 3 to Mach 5. The fourth configuration was the same as the third, but instead of turbojets, it implemented turbofan engines for the preliminary acceleration of the vehicle. From calculations which determined the fuel consumption at incremental Mach numbers this paper found that the ideal solution would require four turbojet engines and two Scramjet engines. The ideal mission profile was determined as being an 8000km sortie based on an averaging of popular long haul flights with strong business ties, which included Los Angeles to Tokyo, London to New York and Dubai to Beijing. This paper deemed that these routes would benefit from hypersonic transport links based on the previously mentioned factors. This paper has found that this configuration would be sufficient for the 8000km flight to be completed in approximately two and a half hours and would consume less fuel than Concord in doing so. However, this propulsion configuration still result in a greater fuel cost than a conventional passenger. In this regard, this investigation contributes towards the specification of the engine requirements throughout a mission profile for a hypersonic passenger vehicle. A number of assumptions have had to be made for this theoretical approach but the authors believe that this investigation lays the groundwork for appropriate framing of the propulsion requirements for sustained hypersonic flight for commercial air transportation. Despite this, it does serve as a crucial step in the development of the propulsion systems required for hypersonic commercial air transportation. This paper provides a methodology and a focus for the development of the propulsion systems that would be required for sustained hypersonic flight for commercial air transportation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hypersonic" title="hypersonic">hypersonic</a>, <a href="https://publications.waset.org/abstracts/search?q=ramjet" title=" ramjet"> ramjet</a>, <a href="https://publications.waset.org/abstracts/search?q=propulsion" title=" propulsion"> propulsion</a>, <a href="https://publications.waset.org/abstracts/search?q=Scramjet" title=" Scramjet"> Scramjet</a>, <a href="https://publications.waset.org/abstracts/search?q=Turbojet" title=" Turbojet"> Turbojet</a>, <a href="https://publications.waset.org/abstracts/search?q=turbofan" title=" turbofan"> turbofan</a> </p> <a href="https://publications.waset.org/abstracts/59663/hypersonic-propulsion-requirements-for-sustained-hypersonic-flight-for-air-transportation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59663.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">320</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Aorta Adhesion Molecules in Cholesterol-Fed Rats Supplemented with Extra Virgin Olive Oil or Sunflower Oil, in Either Commercial or Modified Forms</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ageliki%20I.%20Katsarou">Ageliki I. Katsarou</a>, <a href="https://publications.waset.org/abstracts/search?q=Andriana%20C.%20Kaliora"> Andriana C. Kaliora</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonia%20Chiou"> Antonia Chiou</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Papalois"> Apostolos Papalois</a>, <a href="https://publications.waset.org/abstracts/search?q=Nick%20Kalogeropoulos"> Nick Kalogeropoulos</a>, <a href="https://publications.waset.org/abstracts/search?q=Nikolaos%20K.%20Andrikopoulos"> Nikolaos K. Andrikopoulos</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chronic inflammation plays a pivotal role in CVD development, while phytochemicals have been shown to reduce CVD risk. Several studies have correlated olive oil consumption with CVD prevention and CVD risk reduction. However, the effect of individual olive oil macro- or micro-constituents and possible synergisms among them needs to be further elucidated. Herein, extra virgin olive oil (EVOO) lipidic and polar phenolics fractions were evaluated for their effect on inflammatory markers in cholesterol-fed rats. Oils combining different characteristics as to their polar phenolic content and lipid profile were used. Male Wistar rats were fed for 9 weeks on either a high-cholesterol diet (HCD) or a HCD supplemented with oils, either commercially available, i.e. EVOO, sunflower oil (SO), or modified as to their polar phenol content, i.e. phenolics deprived-EVOO (EVOOd), SO enriched with the EVOO phenolics (SOe). Post-intervention, aorta and blood samples were collected. HCD induced dyslipidemia, manifested by serum total cholesterol and low-density lipoprotein cholesterol elevation. Additionally, HCD resulted in higher adhesion molecules’ levels in rat aorta. In the case of E-selectin, this increase was attenuated by HCD supplementation with EVOO and EVOOd, while no alterations were observed in SO and SOe groups. No differences were observed between pairs of commercial and modified oils, indicating that oleates may be the components responsible for aorta E-selectin levels lowering. The same was true for vascular adhesion molecule-1 (VCAM-1); augmentation in cholesterol-fed animals was attenuated by EVOO and EVOOd diets, highlighting oleates effect. In addition, VCAM-1 levels were higher in SO group compared to the respective SOe, indicating that in the presence of phenolic compounds linoleic acid have become less prone to oxidation. Intercellular adhesion molecule-1 (ICAM-1) levels were higher in cholesterol-fed rats, however not affected by any of the oils supplemented during the intervention. Overall, EVOO was found superior in regulating adhesion molecule levels in rat aorta compared to SO. EVOO and EVOOd exhibited analogous effects on all adhesion molecules assessed, indicating that EVOO major constituents (oleates) improve E-selectin and VCAM-1 levels in rat aorta, independently from phenolics presence. Further research is needed to elucidate the effect of phenolics and oleates in other tissues. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=extra%20virgin%20olive%20oil" title="extra virgin olive oil">extra virgin olive oil</a>, <a href="https://publications.waset.org/abstracts/search?q=cholesterol-fed%20rats" title=" cholesterol-fed rats"> cholesterol-fed rats</a>, <a href="https://publications.waset.org/abstracts/search?q=polar%20phenolics" title=" polar phenolics"> polar phenolics</a>, <a href="https://publications.waset.org/abstracts/search?q=adhesion%20molecules" title=" adhesion molecules "> adhesion molecules </a> </p> <a href="https://publications.waset.org/abstracts/29371/aorta-adhesion-molecules-in-cholesterol-fed-rats-supplemented-with-extra-virgin-olive-oil-or-sunflower-oil-in-either-commercial-or-modified-forms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29371.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">267</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> TNF-Alpha and MDA Levels in Hearts of Cholesterol-Fed Rats Supplemented with Extra Virgin Olive Oil or Sunflower Oil, in Either Commercial or Modified Forms</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ageliki%20I.%20Katsarou">Ageliki I. Katsarou</a>, <a href="https://publications.waset.org/abstracts/search?q=Andriana%20C.%20Kaliora"> Andriana C. Kaliora</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonia%20Chiou"> Antonia Chiou</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Papalois"> Apostolos Papalois</a>, <a href="https://publications.waset.org/abstracts/search?q=Nick%20Kalogeropoulos"> Nick Kalogeropoulos</a>, <a href="https://publications.waset.org/abstracts/search?q=Nikolaos%20K.%20Andrikopoulos"> Nikolaos K. Andrikopoulos</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Oxidative stress is a major mechanism underlying CVDs while inflammation, an intertwined process with oxidative stress, is also linked to CVDs. Extra virgin olive oil (EVOO) is widely known to play a pivotal role in CVD prevention and CVD reduction. However, in most studies, olive oil constituents are evaluated individually and not as part of the native food, hence potential synergistic effects as drivers of EVOO beneficial properties may be underestimated. In this study, EVOO lipidic and polar phenolics fractions were evaluated for their effect on inflammatory (TNF-alpha) and oxidation (malondialdehyde/MDA) markers, in cholesterol-fed rats. Thereat, oils with discernible lipidic profile and polar phenolic content were used. Wistar rats were fed on either a high-cholesterol diet (HCD) or a HCD supplemented with oils, either commercially available, i.e. EVOO, sunflower oil (SO), or modified as to their polar phenol content, i.e. phenolics deprived-EVOO (EVOOd), SO enriched with the EVOO phenolics (SOe). After 9 weeks of dietary intervention, heart and blood samples were collected. HCD induced dylipidemia shown by increase in serum total cholesterol, low-density lipoprotein cholesterol (LDL-c) and triacylglycerols. Heart tissue has been affected by dyslipidemia; oxidation was indicated by increase in MDA in cholesterol-fed rats and inflammation by increase in TNF-alpha. In both cases, this augmentation was attenuated in EVOO and SOe diets. With respect to oxidation, SO enrichment with the EVOO phenolics brought its lipid peroxidation levels as low as in EVOO-fed rats. This suggests that phenolic compounds may act as antioxidant agents in rat heart. A possible mechanism underlying this activity may be the protective effect of phenolics in mitochondrial membrane against oxidative damage. This was further supported by EVOO/EVOOd comparison with the former presenting lower heart MDA content. As for heart inflammation, phenolics naturally present in EVOO as well as phenolics chemically added in SO, exhibited quenching abilities in heart TNF-alpha levels of cholesterol-fed rats. TNF-alpha may have played a causative role in oxidative stress induction while the opposite may have also happened, hence setting up a vicious cycle. Overall, diet supplementation with EVOO or SOe attenuated hypercholesterolemia-induced increase in MDA and TNF-alpha in Wistar rat hearts. This is attributed to phenolic compounds either naturally existing in olive oil or as fortificants in seed oil. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=extra%20virgin%20olive%20oil" title="extra virgin olive oil">extra virgin olive oil</a>, <a href="https://publications.waset.org/abstracts/search?q=hypercholesterolemic%20rats" title=" hypercholesterolemic rats"> hypercholesterolemic rats</a>, <a href="https://publications.waset.org/abstracts/search?q=MDA" title=" MDA"> MDA</a>, <a href="https://publications.waset.org/abstracts/search?q=polar%20phenolics" title=" polar phenolics"> polar phenolics</a>, <a href="https://publications.waset.org/abstracts/search?q=TNF-alpha" title=" TNF-alpha"> TNF-alpha</a> </p> <a href="https://publications.waset.org/abstracts/29822/tnf-alpha-and-mda-levels-in-hearts-of-cholesterol-fed-rats-supplemented-with-extra-virgin-olive-oil-or-sunflower-oil-in-either-commercial-or-modified-forms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29822.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">498</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Forecasting Thermal Energy Demand in District Heating and Cooling Systems Using Long Short-Term Memory Neural Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kostas%20Kouvaris">Kostas Kouvaris</a>, <a href="https://publications.waset.org/abstracts/search?q=Anastasia%20Eleftheriou"> Anastasia Eleftheriou</a>, <a href="https://publications.waset.org/abstracts/search?q=Georgios%20A.%20Sarantitis"> Georgios A. Sarantitis</a>, <a href="https://publications.waset.org/abstracts/search?q=Apostolos%20Chondronasios"> Apostolos Chondronasios</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To achieve the objective of almost zero carbon energy solutions by 2050, the EU needs to accelerate the development of integrated, highly efficient and environmentally friendly solutions. In this direction, district heating and cooling (DHC) emerges as a viable and more efficient alternative to conventional, decentralized heating and cooling systems, enabling a combination of more efficient renewable and competitive energy supplies. In this paper, we develop a forecasting tool for near real-time local weather and thermal energy demand predictions for an entire DHC network. In this fashion, we are able to extend the functionality and to improve the energy efficiency of the DHC network by predicting and adjusting the heat load that is distributed from the heat generation plant to the connected buildings by the heat pipe network. Two case-studies are considered; one for Vransko, Slovenia and one for Montpellier, France. The data consists of i) local weather data, such as humidity, temperature, and precipitation, ii) weather forecast data, such as the outdoor temperature and iii) DHC operational parameters, such as the mass flow rate, supply and return temperature. The external temperature is found to be the most important energy-related variable for space conditioning, and thus it is used as an external parameter for the energy demand models. For the development of the forecasting tool, we use state-of-the-art deep neural networks and more specifically, recurrent networks with long-short-term memory cells, which are able to capture complex non-linear relations among temporal variables. Firstly, we develop models to forecast outdoor temperatures for the next 24 hours using local weather data for each case-study. Subsequently, we develop models to forecast thermal demand for the same period, taking under consideration past energy demand values as well as the predicted temperature values from the weather forecasting models. The contributions to the scientific and industrial community are three-fold, and the empirical results are highly encouraging. First, we are able to predict future thermal demand levels for the two locations under consideration with minimal errors. Second, we examine the impact of the outdoor temperature on the predictive ability of the models and how the accuracy of the energy demand forecasts decreases with the forecast horizon. Third, we extend the relevant literature with a new dataset of thermal demand and examine the performance and applicability of machine learning techniques to solve real-world problems. Overall, the solution proposed in this paper is in accordance with EU targets, providing an automated smart energy management system, decreasing human errors and reducing excessive energy production. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title="machine learning">machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=LSTMs" title=" LSTMs"> LSTMs</a>, <a href="https://publications.waset.org/abstracts/search?q=district%20heating%20and%20cooling%20system" title=" district heating and cooling system"> district heating and cooling system</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20demand" title=" thermal demand"> thermal demand</a> </p> <a href="https://publications.waset.org/abstracts/103172/forecasting-thermal-energy-demand-in-district-heating-and-cooling-systems-using-long-short-term-memory-neural-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/103172.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> ARGO: An Open Designed Unmanned Surface Vehicle Mapping Autonomous Platform</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Papakonstantinou%20Apostolos">Papakonstantinou Apostolos</a>, <a href="https://publications.waset.org/abstracts/search?q=Argyrios%20Moustakas"> Argyrios Moustakas</a>, <a href="https://publications.waset.org/abstracts/search?q=Panagiotis%20Zervos"> Panagiotis Zervos</a>, <a href="https://publications.waset.org/abstracts/search?q=Dimitrios%20Stefanakis"> Dimitrios Stefanakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Manolis%20Tsapakis"> Manolis Tsapakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Nektarios%20Spyridakis"> Nektarios Spyridakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Mary%20Paspaliari"> Mary Paspaliari</a>, <a href="https://publications.waset.org/abstracts/search?q=Christos%20Kontos"> Christos Kontos</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonis%20Legakis"> Antonis Legakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarantis%20Houzouris"> Sarantis Houzouris</a>, <a href="https://publications.waset.org/abstracts/search?q=Konstantinos%20Topouzelis"> Konstantinos Topouzelis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> For years unmanned and remotely operated robots have been used as tools in industry research and education. The rapid development and miniaturization of sensors that can be attached to remotely operated vehicles in recent years allowed industry leaders and researchers to utilize them as an affordable means for data acquisition in air, land, and sea. Despite the recent developments in the ground and unmanned airborne vehicles, a small number of Unmanned Surface Vehicle (USV) platforms are targeted for mapping and monitoring environmental parameters for research and industry purposes. The ARGO project is developed an open-design USV equipped with multi-level control hardware architecture and state-of-the-art sensors and payloads for the autonomous monitoring of environmental parameters in large sea areas. The proposed USV is a catamaran-type USV controlled over a wireless radio link (5G) for long-range mapping capabilities and control for a ground-based control station. The ARGO USV has a propulsion control using 2x fully redundant electric trolling motors with active vector thrust for omnidirectional movement, navigation with opensource autopilot system with high accuracy GNSS device, and communication with the 2.4Ghz digital link able to provide 20km of Line of Sight (Los) range distance. The 3-meter dual hull design and composite structure offer well above 80kg of usable payload capacity. Furthermore, sun and friction energy harvesting methods provide clean energy to the propulsion system. The design is highly modular, where each component or payload can be replaced or modified according to the desired task (industrial or research). The system can be equipped with Multiparameter Sonde, measuring up to 20 water parameters simultaneously, such as conductivity, salinity, turbidity, dissolved oxygen, etc. Furthermore, a high-end multibeam echo sounder can be installed in a specific boat datum for shallow water high-resolution seabed mapping. The system is designed to operate in the Aegean Sea. The developed USV is planned to be utilized as a system for autonomous data acquisition, mapping, and monitoring bathymetry and various environmental parameters. ARGO USV can operate in small or large ports with high maneuverability and endurance to map large geographical extends at sea. The system presents state of the art solutions in the following areas i) the on-board/real-time data processing/analysis capabilities, ii) the energy-independent and environmentally friendly platform entirely made using the latest aeronautical and marine materials, iii) the integration of advanced technology sensors, all in one system (photogrammetric and radiometric footprint, as well as its connection with various environmental and inertial sensors) and iv) the information management application. The ARGO web-based application enables the system to depict the results of the data acquisition process in near real-time. All the recorded environmental variables and indices are presented, allowing users to remotely access all the raw and processed information using the implemented web-based GIS application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=monitor%20marine%20environment" title="monitor marine environment">monitor marine environment</a>, <a href="https://publications.waset.org/abstracts/search?q=unmanned%20surface%20vehicle" title=" unmanned surface vehicle"> unmanned surface vehicle</a>, <a href="https://publications.waset.org/abstracts/search?q=mapping%20bythometry" title=" mapping bythometry"> mapping bythometry</a>, <a href="https://publications.waset.org/abstracts/search?q=sea%20environmental%20monitoring" title=" sea environmental monitoring"> sea environmental monitoring</a> </p> <a href="https://publications.waset.org/abstracts/157441/argo-an-open-designed-unmanned-surface-vehicle-mapping-autonomous-platform" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157441.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">139</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Account <li><a href="https://waset.org/profile">My Account</a></li> </ul> </div> <div class="col-md-2"> 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