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Search Results: 1 - 10 of 1538 matches for " Dimitrios Vlachopoulos "
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Introducing online teaching in Humanities: A case study about the acceptance of online activities by the academic staff of classical languages
Dimitrios Vlachopoulos
DIGITHUM , 2009,
Abstract: L'objectiu d'aquest article és mostrar les percepcions del professorat de llengües clàssiques (grec antic i llatí) amb relació a les activitats en línia fetes durant els cursos. L'estudi es va fer a tres pa sos: Grècia (a tres universitats importants), Espanya (a la Universitat de Barcelona) i els Estats Units (a la Universitat de Califòrnia a Berkeley) amb la participació de trenta-tres professors. Segons el nivell d'ús i d'acceptació de les TIC i a partir de la classificació de G. Moore, vam separar els docents participants en tres grups: els conservadors, el corrent principal i els adoptadors primerencs. El fet que el grup més petit sigui el tercer mostra clarament que hi ha una necessitat de preparació i formació dels professors abans d'introduir projectes innovadors a l'aula. Com que el punt d'inici de l'aplicació d'innovació a l'aula és el professorat, els responsables dels projectes d'innovació s'haurien de centrar a ajudar-los a conscienciar-se dels canvis en els mètodes d'ensenyament i a incloure la seva opinió durant el disseny dels esmentats projectes. The purpose of this paper is to show the perceptions of the academic staff of classical languages (ancient Greek and Latin) concerning use of online activities during their courses. The study was carried out in three countries: Greece (three major Universities), Spain (University of Barcelona) and the United States (University of California, Berkeley) with the participation of thirty-three academic instructors. Depending on the level of use and acceptance of the ICT and following G. Moore's classification, we separated the participating academics in three groups: the conservatives, the mainstream and the early adopters. The fact that the smallest group is the third clearly shows the necessity for teachers' preparation and training before introducing innovative projects in the classroom. Since the starting point for the application of innovation in the classroom is the teacher, policy makers should focus on helping them become conscious of changes in teaching methods and include their opinion during the design of innovative projects. El objetivo de este artículo es mostrar las percepciones del profesorado de lenguas clásicas (griego antiguo y latín) con relación a las actividades en línea realizadas durante los cursos. El estudio se llevó a cabo en tres países: Grecia (en tres universidades importantes), Espa a (en la Universidad de Barcelona) y Estados Unidos (en la Universidad de California en Berkeley) con la participación de treinta y tres profesores. Según el nivel de uso y de aceptación de
Building an Inclusive Definition of E-Learning: An Approach to the Conceptual Framework
Albert Sangrà,Dimitrios Vlachopoulos,Nati Cabrera
International Review of Research in Open and Distance Learning , 2012,
Abstract: E-learning is part of the new dynamic that characterises educational systems at the start of the 21st century. Like society, the concept of e-learning is subject to constant change. In addition, it is difficult to come up with a single definition of e-learning that would be accepted by the majority of the scientific community. The different understandings of e-learning are conditioned by particular professional approaches and interests.An international project, based on the participation of experts around the world, was undertaken to agree on a definition of e-learning. To this end, two main research activities were carried out. First, an extensive review was conducted of the literature on the concept of e-learning, drawing from peer-reviewed journals, specialised web pages, and books. Second, a Delphi survey was sent out to gather the opinions of recognised experts in the field of education and technology regarding the concept of e-learning with a view to reaching a final consensus.This paper presents the outcomes of the project, which has resulted in an inclusive definition of e-learning subject to a high degree of consensus that will provide a useful conceptual framework to further identify the different models in which e-learning is developed and practiced.
Frequency of admission in Intensive Care Unit due to road accident
Othon Vlachopoulos,Stergios Voutos,Dimitrios Karagiorgis,Vasilios Tziallas
To Vima tou Asklipiou , 2011,
Abstract: During recent years, it has been noticed a remarkable increase in admission of the young in Intensive Care Unit due to road accident. The aim of the present study was to explore the injuries, the special conditions of admission of young 18-40 years old that were admitted to Intensive Care Unit due to road accident. Method and material: The sample studied consisted of young individuals 18-40 years old that were admitted in the Intensive Care Unit (ICU) of public hospitals in the area of Attica for 3 years. Data were collected by the completion of a special designed questionnaire that apart from demographic variables, the record of injuries and the conditions of treatment it also included variables concerning the type of vehicle that caused the road accident as well as the outcome of patients' course. Data analysis was performed by the statistical package SPSS 13 and the method x2 and t-test. Results: The sample studied consisted of 555 young individuals, of the 13,1% of total admissions in ICU. Of the participants 82,2% were men and 17,8% women, with mean age 26,5 years. Regarding the frequency of various types of injuries, 24,7% of the participants had injuries of upper limbs and 26,4% of lower. 30,2% of the sample had more than 3 fractures, while the 6,9% more than 5. 75,7% of the participants had head injury. Moreover, it was found that the frequency of head injuries was statistical significant lower among those wearing helmet (64,5%) compared to those not wearing (82,5%), p<0,05. Intubation had the 17,9% of he sample, while in coma was the 11,6%. Finally, it was found that patients admitted in ICU from operation room (36,2%) were more likely with statistical significant more to die compared to those admitted by Emergency department (17,8%) by hospital of other town (16,7%) by other hospital (14,3%), or other clinic department (12,5%). Conclusions: Road accidents consist the main reason for admission of the young in ICU. The majority of individuals were multi-injured. Due to the increased incidence of admission, it is judged necessary the institution of ICU in every big hospital.
Role of green tea in reduction of cardiovascular risk factors
Nikolaos Alexopoulos, Charalambos Vlachopoulos, Christodoulos Stefanadis
Nutrition and Dietary Supplements , 2010, DOI: http://dx.doi.org/10.2147/NDS.S6025
Abstract: le of green tea in reduction of cardiovascular risk factors Review (6434) Total Article Views Authors: Nikolaos Alexopoulos, Charalambos Vlachopoulos, Christodoulos Stefanadis Published Date August 2010 Volume 2010:2 Pages 85 - 95 DOI: http://dx.doi.org/10.2147/NDS.S6025 Nikolaos Alexopoulos, Charalambos Vlachopoulos, Christodoulos Stefanadis 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece Abstract: Tea is widely consumed worldwide. There is accumulating evidence that tea -consumption may be associated with reduced cardiovascular risk, an association that could be attributed to its flavonoid content. Green tea, the most common type of tea consumed in Asia, contains a large amount of nonoxidized flavonoids, named catechins. Green tea -consumption has been associated with reduced incidence of cardiovascular mortality, stroke, and -myocardial infarction. Although there is some inconsistency in the results, large, well-designed observational studies have shown this inverse association. However, the association of green tea with coronary artery disease is less well-established. The protective effect of green tea on -cardiovascular events may be mediated by beneficial effects of green tea on various classical and novel cardiovascular risk factors. There is evidence that green tea reduces total and low-density lipoprotein (LDL) cholesterol and oxidized LDL cholesterol, enhances insulin sensitivity, and may prevent development of diabetes mellitus. There is also evidence that green tea reduces oxidative stress and reverses endothelial dysfunction. Its effect on blood pressure and arterial stiffness is confounded by the presence of caffeine, which has pressor and arterial stiffening effects, although this effect is probably counterbalanced by beneficial effects of other constituents in green tea. Green tea acutely increases blood pressure more than its caffeine content; the ingredients responsible for this are not known. On the other hand, green tea has a milder acute effect on arterial stiffness than its caffeine content. Its chronic effect on blood pressure and arterial stiffness may be neutral or even beneficial.
In-Motes EYE: A Real Time Application for Automobiles in Wireless Sensor Networks  [PDF]
Dimitrios Georgoulas, Keith Blow
Wireless Sensor Network (WSN) , 2011, DOI: 10.4236/wsn.2011.35018
Abstract: Wireless sensor networks have been identified as one of the key technologies for the 21st century. In order to overcome their limitations such as fault tolerance and conservation of energy, we propose a middleware solution, In-Motes. In-Motes stands as a fault tolerant platform for deploying and monitoring applications in real time offers a number of possibilities for the end user giving him in parallel the freedom to experiment with various parameters, in an effort the deployed applications to run in an energy efficient manner inside the network. The proposed scheme is evaluated through the In-Motes EYE application, aiming to test its merits under real time conditions. In-Motes EYE application which is an agent based real time In-Motes application developed for sensing acceleration variations in an environment. The application was tested in a prototype area, road alike, for a period of four months.
The Relationship between Stock Returns and Volatility in the Seventeen Largest International Stock Markets: A Semi-Parametric Approach  [PDF]
Dimitrios Dimitriou, Theodore Simos
Modern Economy (ME) , 2011, DOI: 10.4236/me.2011.21001
Abstract: We empirically investigate the relationship between expected stock returns and volatility in the twelve EMU countries as well as five major out of EMU international stock markets. The sample period starts from De-cember 1992 until December 2007 i.e. up to the recent financial crisis. Empirical results in the literature are mixed with regard to the sign and significance of the mean – variance tradeoff. Based on parametric GARCH in mean models we find a weak relationship between expected returns and volatility for most of the markets. However, using a flexible semi-parametric specification for the conditional variance, we unravel significant evidence of a negative relationship in almost all markets. Furthermore, we investigate a related issue, the asymmetric reaction of volatility to positive and negative shocks in stock returns confirming a negative asymmetry in almost all markets.
Wireless Sensor Network Management and Functionality: An Overview  [PDF]
Dimitrios GEORGOULAS, Keith BLOW
Wireless Sensor Network (WSN) , 2009, DOI: 10.4236/wsn.2009.14032
Abstract: Sensor networks are dense wireless networks of small, low-cost sensors, which collect and disseminate en-vironmental data. Wireless sensor networks facilitate monitoring and controlling of physical environments from remote locations with better accuracy. They have applications in a variety of fields such as environ-mental monitoring; military purposes and gathering sensing information in inhospitable locations. Sensor nodes have various energy and computational constraints because of their inexpensive nature and adhoc method of deployment. Considerable research has been focused at overcoming these deficiencies through more energy efficient routing, localization algorithms and system design. Our survey presents the funda-mentals of wireless sensor network, thus providing the necessary background required for understanding the organization, functionality and limitations of those networks. The middleware solution is also investigated through a critical presentation and analysis of some of the most well established approaches.
Anger and hostility in the aftermath of a wildfire disaster in Greece  [PDF]
Dimitrios Adamis, Vicky Papanikolaou
Open Journal of Psychiatry (OJPsych) , 2011, DOI: 10.4236/ojpsych.2011.12010
Abstract: Previous studies reported that anger and hostility are often presented in the victims of a disaster. This study investigates the symptoms of anger and hostility after a wildfire disaster in a rural area of Greece. Cross sectional case control study of adult population (18-65 years old). Face to face interview. Data collected were demographic, Symptom Checklist 90-Revised for assessment of hostility, type and number of losses, trust in institutions personal and social attitudes. It was found that more of the victims of the wildfires reported symptoms of hostility compared to controls but this difference was disappeared when we adjust for other variables. Risk factors for development of hostility among the victims were mistrust in military forces and media, high levels of anxiety and distress, younger age and having higher education. It was concluded that anger and hostility after a disaster perhaps are not only related to disaster but other factors concerning demographic and personal characteristics may play an important role.
The Development of the Greek Personality Assessment Inventory  [PDF]
Dimitrios Georgiou Lyrakos
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.28122
Abstract: Presented in the current report are the reliability analysis of the Greek Personality Assessment Inventory (PAI), the differences between the means and the standard deviation (SD) of the Greek and the US sample and the creation of the maximum non-clinical T Scores for each of the scale and subscale produced by the Greek standardization sample. The PAI is considered, in the US and in many European countries, one of the most reliable multidimensional psychometric inventories. The PAI consists of 344 questions that are separated in non-over- lapping scales of clinical, treatment focus, personality and validity context. The present, mixed design study had 1870 participants, males and females between the ages of 20 and 55.The participants were 1120 non-clinical (standardization sample), 450 psychiatric inpatients and 300 psychiatric outpatients, who were gathered from 4 major regions of Greece.
The Impact of Stress, Social Support, Self-Efficacy and Coping on University Students, a Multicultural European Study  [PDF]
Dimitrios G. Lyrakos
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.32022
Abstract: The present study is a follow up study of 562 University students during a 12 month period, at Universities from the UK, France, Germany, Austria, Spain, Italy, and Greece. The purpose of the study is to examine the impact of stress, social support and self-esteem on university students. To our knowledge, it is one of the very few, if not the only study, that examines those particular variables in a multicultural sample. The students completed at the beginning of the 12 month period a self reported scale about stress (the Daily Hassles questionnaire), self-esteem, and social support. During the second time the participants have also completed sections about University Satisfaction, and Coping Styles of Stress. The statistical analysis afterwards has shown that the levels of stress have been significantly reduced after the passing of the 12 month period (p < .001), as it was hypothesised. On the other hand Social Support has been significantly reduced during the passing year (p = .049), which confirmed the Null-Hypothesis. Furthermore the research has shown that the levels of stress are negatively correlated with the positive ways of coping, the levels of social support, self-esteem and University Satisfaction. On the other hand the levels of stress are positive correlated with the negative ways of coping, all above correlation have been proven to be significant (p < .005). Finally the country of studies has shown some differences in the levels of stress and in the rest of the variables of interest, particularly between the UK students and the rest of the other countries.
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