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Search Results: 1 - 10 of 215 matches for " Evangelia Nerantzaki "
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A Connectivity-Based Legalization Scheme for Standard Cell Placement  [PDF]
Antonios N. Dadaliaris, Panagiotis Oikonomou, Maria G. Koziri, Evangelia Nerantzaki, Thanasis Loukopoulos, Georgios I. Stamoulis
Circuits and Systems (CS) , 2017, DOI: 10.4236/cs.2017.88013
Abstract: Standard cell placement algorithms have been at the forefront of academic research concerning the physical design stages of VLSI design flows. The penultimate step of a standard cell placement procedure is legalization. In this step the manufacturability of the design is directly settled, and the quality of the solution, in terms of wirelength, congestion, timing and power consumption is indirectly defined. Since the heavy lifting regarding processing is performed by global placers, fast legalization solutions are protruded in state-of-the-art design flows. In this paper we propose and evaluate a legalization scheme that surpasses in execution speed two of the most widely used legalizers, without not only corrupting the quality of the final solution in terms of interconnection wirelength but improving it in the process.
Low Noise Amplifier Design for Digital Television Applications  [PDF]
Anastasios Tsaraklimanis, Evangelia Karagianni
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.37047
Abstract: The DVB-T (Digital Video Broadcasting—Terrestrial) standard is being deployed in many parts of the world for digital broadcasting services, providing a variety of features extending the capabilities of the older analog ones. In this paper, a two-stage low noise amplifier (LNA) is designed for use with the DVB-T standard. The design is employed based on microstrip. The microwave design meets all the specifications required, achieving input and output return loss below ?10 dB, high gain of 35 dB and high linearity. Low noise figure of 1.3 dB is achieved with the use of pHEMT transistor technology.
Meaning in Life, Psychological Well-Being and Depressive Symptomatology: A Comparative Study  [PDF]
George Kleftaras, Evangelia Psarra
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.34048
Abstract: The purpose of the present study was to examine the relationship of meaning in life and its dimensions to depression and general psychological health, as well as the differences concerning the meaning of life among individuals with low, moderate and high depressive symptomatology. A sample of 401 newly recruited young men for their national service in the navy, completed four questionnaires on meaning in life, depressive symptomatology, psychological health and socio-demographic factors. Significant associations were found between meaning in life and depressive symptoms. As expected, subjects with higher life meaning were found to have lower depressive symptomatology, while subjects with higher depression scores were found to have a lower sense of meaning in life. However, concerning the meaning in life dimensions, only the “contentedness with life” and the “goal achievement” significantly differentiated individuals of low, moderate and high depressive symptomatology. Furthermore, statistical significant correlations were found between meaning in life and the four dimensions of general health. In the same vein, the comparison between individuals with the lower and the higher meaning of life has shown that the two groups differ significantly with regards to psychological health: those with higher meaning of life present a better psychological health. Finally, being married or involved in a romantic relationship, as well as participation in social activities are proven to be significant sources of meaning. These findings point to a definite relationship of meaning in life with depression and psychological health. Implications for psychotherapy and counselling are discussed.
The Imaginary Audience and the Personal Fable: A Test of Elkind’s Theory of Adolescent Egocentrism  [PDF]
Evangelia P. Galanaki
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.36065
Abstract: The aim of this research was to test empirically Elkind’s (1967, 1970, 1978) Piagetian theoretical formulation for the developmental nature of adolescent egocentrism. The contribution of this study is threefold because it includes: 1) Pubertal development (with a distinction between status and timing), which has been systematically ignored by other investigators; 2) a broad age range (11 - 18 year-old adolescents); and 3) a variety of manifestations and dimensions of egocentrism. The association of the two main forms of adolescent egocentrism—the imaginary audience and the personal fable—with age, gender, pubertal development, and formal operational thought was investigated. Participants were 314 adolescents who completed the Physical Development Scale (Petersen, Crockett, Richards, & Boxer, 1988), a battery of cognitive tasks (Demetriou, Efklides, & Platsidou, 1993), the Imaginary Audience Scale (Elkind & Bowen, 1979), the New Imaginary Audience Scale (Lapsley, Fitzgerald, Rice, & Jackson, 1989), the Personal Fable Scale (Elkind, personal communication, August 10, 1993), and the New Personal Fable Scale (Lapsley et al., 1989). Findings provided partial support for Elkind’s hypothesis. Only the imaginary audience in the form of self-consciousness was associated with grade. Systematic gender differences emerged for several dimensions of imaginary audience and personal fable. For only a few dimensions of imaginary audience and personal fable the expected associations with pubertal and cognitive development, as well as interesting interaction effects, were found. Results are discussed in terms of their implications for Elkind’s theory and for alternative interpretations of imaginary audience and personal fable.
An X-Band Low Noise Amplifier Design for Marine Navigation Radars  [PDF]
Christina Lessi, Evangelia Karagianni
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2014, DOI: 10.4236/ijcns.2014.73009
Abstract:

In this paper, the design of a 9.1 GHz Low Noise Amplifier (LNA) of a RADAR receiver that is used in the Navy is presented. For the design of the LNA, we used GaAs Field-Effect Transistors (FETs) from Agilent ADS component library. In order to keep the cost of the circuit in low prices and the performance high, we design a two-stage LNA.

Trophic State Evaluation of a Large Mediterranean Lake Utilizing Abiotic and Biotic Elements  [PDF]
George Kehayias, Evangelia Doulka
Journal of Environmental Protection (JEP) , 2014, DOI: 10.4236/jep.2014.51003
Abstract:

The trophic state of a freshwater ecosystem reflects its environmental quality. This is why several trophic indicators have been developed for such water bodies based on chemical, physical and biological parameters. Apart from that, there are several biotic elements which can be used in accessing the environmental condition of a freshwater ecosystem. Zooplankton organisms are important elements of the structure and function of lakes and are considered useful indicators of alterations in their trophic dynamics and ecological state related to changes in nutrient loading and climate. In accordance to the above, the present study is an attempt to assess the trophic condition of the largest lake in Greece (Lake Trichonis) through the investigation of the physicochemical elements, along with the biotic indications provided by a three-year study of the lake’s zooplankton. The present results, compared with previous studies conducted between 15 and 25 years before, showed that there was an increase in the maximum values of the concentrations of chlorophyll-α and nutrients, while there was a decrease in water transparency. The implementation of Carslon’s trophic state index (TSI) revealed that Lake Trichonis still remains an oligo-to mesotrophic ecosystem as it was in the past. However, although the zooplankton investigation showed several features that are common in oligotrophic lakes, there are certain eutrophic characteristics of the zooplankton community (e.g. abundance variation pattern, indicator species, seasonal succession of cladocerans) pointing out a different state of the ecosystem in comparison to the past. In conclusion, the use of a biotic element like zooplankton revealed that Lake Trichonis is experiencing a transitional condition towards the eutrophic state and points out the necessity for constant inspection and monitoring of this ecosystem. 

Arteriovenous fistula: An evidence based practice in nursing care
Evangelia Prevyzi
To Vima tou Asklipiou , 2013,
Abstract: The arteriovenous fistula (AVF) is the most frequent form of vascular access for patients undergoing haemodialysis because it ensures good quality of dialysis and reduce haemodialysis mortality. For this reason, the nephrology nurse plays an important role in the appropriate care of fistula with a view to promoting the longevity and prevention of complications. Purpose: The purpose of this review was to investigate the role of Nephrology nurse in the appropriate care of fistula, promoting longevity and reducing complications, based on scientific data and international guidelines. Material-Method: The methodology followed in this review relied on literatures reviews and investigative studies, which were carried out during the period 2000-2012 and international (Medline, PubMed, Cinahl) and Greek databases (Iatrotek) on the care and management of fistula in people undergoing chronic haemodialysis. Key-words were used: Arteriovenous fistula, cannulation techniques fistula, guidelines, vascular access, role of nurse. Results: The arteriovenous fistula (AVF) is the life line for patients undergoing haemodialysis. For this reason, the appropriate care of fistula and its maintenance in a good condition plays an important role for patient s life. Conclusions: Nephrology nurse has a major role in the proper management of the fistula and the education of the patient. Additionally, there is a need for cooperation between all the members of the multidisciplinary team, which includes dialysis nurse, nefrologist, access surgeon, and radiologist, for the broader assessment of fistula and the prevention and timely treatment of any complications.
Acute renal failure from rhabdomyolysis by heroin use: nursing approach
Evangelia Prevyzi
To Vima tou Asklipiou , 2013,
Abstract: Rhabdomyolysis is caused by muscle breakdown resulting in the release of myoglobin into the systemic circulation. Acute renal failure results from the nephrotoxicity of myoglobin. Heroin use is one of the causes of rhabdomyolysis and acute renal failure. Aim: The aim of this literature review was highlight the importance of early recognition and treatment by a nurse of acute renal failure from rhabdomyolysis after heroin. Method: The method followed in this review was based on retrospective studies and research, conducted during the period 2000-2012 and retracted from the international databases Medline, Pubmed, Cinahl and the Greek database Iatrotek on acute renal failure from rhabdomyolysis after heroin use. Key-words were used: acute renal failure, rhabdomyolysis, heroin, international guidelines, based-evidence nursing care. Results: The clinical presentation occurs with muscle pain, muscle weakness, and brown-redish urine. High values of CPK and myoglobin make the diagnosis. Toxicology tests confirm heroin use. For the treatment is required naloxone administration, the rapid hydration of the patient, alkalinization of urine, good diuresis, regulation of electrolyte disturbances and dialysis if necessary. Conclusions: Early recognition and treatment of acute renal failure from rhabdomyolysis after heroin use is vital for the survival of the patient. It is necessary to educate nurses on specific issues such as acute renal failure from rhabdomyolysis after heroin use and the implementation of protocols for the treatment and cure.
Les miroirs perforés de la télévision
Evangelia Kourti
Mise au Point : Cahiers de l’Association Fran?aise des Enseignants et Chercheurs en Cinéma et Audiovisuel , 2011,
Abstract: Force est de constater que depuis quelques années les frontières traditionnelles entre les émissions politiques et les émissions dites non politiques (qu’il s’agisse des spectacles, des émissions sociales, des jeux, des fictions télévisées, etc.) deviennent de plus en plus perméables du point de vue des relations entre télévision et société. Les telenovelas brésiliennes sont l’exemple par excellence du fait que la sphère publique ne peut plus être pensée sans tenir compte de la manière do...
A industrializa o no Rio Grande do Sul nas primeiras décadas da República: a organiza o da produ o e as condi es de trabalho (1889-1920)
Evangelia Aravanis
Revista Mundos do Trabalho , 2010, DOI: 10.5007/1984-9222.2010v2n3p148
Abstract: http://dx.doi.org/10.5007/1984-9222.2010v2n3p148 Este artigo visa contribuir para o estudo das condi es de trabalho e da organiza o da produ o fabril existentes no Rio Grande do Sul nas primeiras décadas da República (1889 a 1920). Especificamente, busca evidenciar as causas de acidentes de trabalho, as condi es de higiene existentes, o poder aquisitivo dos salários dos operários e a divis o sexual do trabalho em vigor nas fábricas, bem como averiguar como todos esses elementos repercutiram sobre o corpo do operário.
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