bluuebunny/crossref_metadata_2025 huggingface dataset:
Preliminary study for the implementation of the “Wave Dragon” in Gran Canaria, Canary Islands, Spain
Authors: Miguel Sagaseta de Ilurdoz Cortadellas  , Miguel Ángel Guerra Rodríguez  , Raquel Ramos Pereda  , Pedro D. Cuesta Moreno
Published: May 2017

The island of Gran Canaria offers extraordinary weather conditions for the exploitation of renewable energy. But it has also an isolated power system that is vulnerable and has low inertia. This fact limits the penetration of this energy on the network. Both wind energy and photovoltaics have an important development in the island, but both have clear disadvantages for its exploitation, due to its unstable generation curves, its lack of predictability, the fact that this type of energy can’t be generated continuously, and consequently, the problems due to its difficult management. In adition, talking about wind energy, should be noted that Gran Canaria is an ecological paradise, full of natural protected areas, and also it has a high population density. That's why the space for future energetic installations is very limited. However, the Canary Islands are surrounded by an unlimited ocean. The swell is able to supply part of the insular consumption through wave energy. This study analyze the energetic situation of Gran Canaria, the nature of its waves, and the different mechanisms and techniques for the exploitation of this energetic resource, giving an added value to those that allow to obtain quality energy to be poured into the network.
Perspectives of Demand-Side Management in a Smart Metered Environment
Authors: A. Dán  , D. Divényi  , B. Hartmann  , P. Kiss  , D. Raisz  , I. Vokony
Published: May 2017

Some distribution system operators (DSOs) - among them all Hungarian DSOs - have installed extensive demand-side management (DSM) infrastructure in order to be able to perform peak-clipping and valley-filling of the daily load curves. These systems rely either on the traditional ripple control (RC) or radio ripple control (RRC) technology. In this paper a short overview on the capabilities of these methods will be given, and compared to the DSM possibilities offered by Smart Metering (SM) based systems. In the focus of the paper a new modelling framework will be presented, which makes it possible to simulate the consumer behaviour on an appliance level in different DSM environments. The effects of direct DSM methods (like RC or RRC) and soft DSM (dynamic tariff systems) on the daily load curves will be analyzed in order to exploit the possibilities of SM systems.
Real heating-value based cost-accounting method with networking capabilities in natural gas distribution systems
Authors: G. Barta  , T. Csubák Dr
Published: May 2017

Nowadays customer-side natural gas measurements are only focused on gas volume, while prices are increasing and the market becomes more open. Because of the efficient cost accounting, large customers get interested in measurements corrected by real calorific value. For determining the real energy flow, continuous measurement of gas consistency needed. But online gas chromatography is too expensive for even large consumers. However the information exists at provider-side databases and can be used for calorific value and energy flow computing at different customer-side locations. The aim of the research and development project was to give a cost-effective solution to these requirements. At the first we give a short theoretical overview of gas-flow measurements in cost-accounting and show the related standards. After that we define a realizable computing method, and deal with the structure and operation of the new measurement system.
Comprehensive utilization of energy in sugar factory using renewable energy sources, maximizing the power cogeneration.
Authors: E. Gil  , L.A. Bujedo  , L. Gorostiaga
Published: May 2017

In this paper we evaluate the implementation of renewable
energy to process sugar and alcohol production. This has been
applied to dynamic simulation techniques that provide
quantitative information production in a Caribbean climate
Neural Networks Applications for Fault Detection on Wind Turbines
Authors: R. F. Mesquita Brandão  , J. A. Beleza carvalho  , F. P. Maciel Barbosa
Published: May 2017

Wind energy is the renewable energy source with a higher growth rate in the last decades. The huge proliferation of wind farms across the world has arisen as an alternative to the traditional power generation and also as a result of economic issues which necessitate monitoring systems in order to optimize availability and profits. Tools to detect the onset of mechanical and electrical faults in wind turbines at a sufficiently early stage are very important for maintenance actions to be well planned, because these actions can reduce the outage time and can prevent bigger faults that may lead to machine stoppage. The set of measurements obtained from the wind turbines is enormous and the use of neural networks may be useful in understanding if there is any important information that may help the prevention of serious failures. The training of the Neural Networks however is not easy because the measurement set used for training must represent a period of time with no faults in the equipment of the turbine that is being monitored.
Analysis of Remote Islanding Detection Methods for Distributed Resources
Authors: A. Etxegarai  , P. Eguía  , I. Zamora
Published: May 2017

Penetration of distributed generation in the power
grid is increasing. This situation leads to new possibilities but
also new issues, such as anti-islanding protection. During a
loss-of-mains or islanding situation, distributed generation
(DG) units remain feeding a part of the electrical network
without connection to the main power system. Currently, DG
units have to be disconnected from the grid during islanding as
soon as possible, due to potential risks for repair crews and
components, poor power quality in the island and reclosing
problems. A fast and reliable islanding detection method could
avoid mentioned issues. Among the many existing methods,
remote schemes could meet these requirements.
Hence, this paper presents the operating principles of remote
islanding detection methods, as well as the current state of
development of communication-based remote islanding
detection methods to be applied in distributed power generation
systems.
Application of generalized non-active power theory for parallel hybrid compensation of periodic and non-periodic disturbances
Authors: Zdeněk Muller  , Jan Švec  , Josef Tlustý  , Viktor Valouch
Published: May 2017

A strategy of decomposition of detrimental current components in electric power systems is presented. The method is based on the non-active power theory with different averaging time intervals. These individual current components can be used as the reference signals for the devices compensating periodic as well as non-periodic and stochastic currents generated by non linear unbalanced loads connected to an unsymmetrical non sinusoidal voltage power source. The use of an appropriate set of parallel compensation devices for mitigating individual detrimental load current components with different dynamics can lead to the substantial reduction of the power rating and cost of such a hybrid compensator.
Energy Household Forecast with ANN for Demand Response and Demand Side Management
Authors: Filipe Rodrigues  , Carlos Cardeira  , J.M.F.Calado  , R. Melício
Published: May 2017

This paper presents a short term load forecasting with artificial neural networks. Despite the great imprevisibility, it is possible to forecast the electricity consumption of a household with some accuracy, similarly to that the electricity utilities can do to an agglomerate of households. Nowadays, in an existing electric grid, it is important to understand and forecast household daily or hourly consumption with a reliable model for electric energy consumption and load profile. Demand response programs required this information to adequate the profile of energy load diagram to generation. In the short term load forecasting model, artificial neural networks were used, with a consumption records database. The results show that the artificial neural networks approach provides a reliable model for forecasting household electric energy consumption and load profile. To do so and using smart devices such as cyber-physical systems monitoring, gathering and computing in real time a database with weekdays and weekend, can improve forecasts results for the next hours, a strong tool for Demand Response and Demand Side Management.
Vanadium Redox Flow Battery Storage System Linked to the Electric Grid
Authors: B.N. Arribas  , R. Melício  , J.G. Teixeira  , V.M.F. Mendes
Published: May 2017

This paper focuses on technology state of the art for the charge/discharge of electric energy storage supported by vanadium redox flow battery linked to the electric grid. Properties of vanadium, the main configuration and the reaction of charge/discharge of a vanadium redox flow battery are addressed. The vanadium redox flow battery has the highest cell voltage among the other redox flow battery, implying higher power and energy density which favours application at power plants. This electric energy storage is viewed as a promising contribution to be integrated in power system due to a reasonably bulky size and to successful applications currently allowing storage of energy at power plants or at electrical grids. For instances, allowing storage of energy as an economic improvement providing spin reserve to avoid penalty for imbalances between the energy delivered and energy contracted at closing of electricity market or as an economic improvement to diminish the cost of electricity usage of a consumer. The vanadium redox flow battery has the advantages of scalability customized to meet requirements for power and energy capacity and of excellent combination of energy efficiency, capital cost and life cycle costs compared with other technology.
Traffic Lights Control Prototype Using Wireless Technologies
Authors: J. Cunha  , C. Cardeira  , R. Melício
Published: May 2017

This paper presents a traffic lights control prototype using wireless technologies, i.e., Arduino and XBee technologies, with at least 1 km range. The algorithm and the grid also allow flow of information between message boards and multiple wireless sensors networks in an interconnected system. The communication range between the points of interest can be changed according to the needs of each network, so that this prototype can be applied almost everywhere. The prototype in this paper allows great flexibility allowing the network to adapt to local failures or unforeseen cases. Even the control center can be moved to other place without large drawbacks, especially when compared to all the bunch of cables used in point to point connections.
Wireless Energy Transfer with Three-Phase Magnetic Field System: Experimental Results
Authors: L.F. Romba  , Stanimir S. Valtchev  , R. Melício
Published: May 2017

In this paper a three-phase magnetic field system is applied to the wireless power transfer system. The research is directed not only to the distribution of the magnetic field but to optimize the energy transfer efficiency, and to reduce the electromagnetic field influence to the surroundings. The development of the future intelligent transportation system depends on the electric mobility, namely, the individual or the public electric vehicles. It is crucial to achieve progress in the batteries and the battery charging, especially through a wireless power transfer technology. The study of the magnetic field is important in this technology. The energy transfer efficiency depends of the alignment, the size of the coils, the spatial orientation of the magnetic field, the detachment and the tilt between the windings.
Para uma cosmópolis lusófona de Estudos Clássicos
Authors: Fialho Maria do Céu
Published: May 2017

O objectivo deste texto é proporcionar uma visão global da evolução e expansão das mobilidades e da colaboração entre as universidades brasileiras e portuguesas, no âmbito dos Estudos Clássicos, nos últimos cinquenta anos, desde as colaborações individuais e pontuais até às colaborações insti­tucionalmente planificadas, tendo em vista a incrementação de trabalho conjunto de pesquisa e de ensino. São já visíveis os resultados desta estratégia e eles atestam as imensas poten­cialidades que a construção em curso de uma comunidade lusófona de Estudos Clássicos possui.
Apresentação - Dossiê
Authors: Omena Luciane Munhoz de , Funari Pedro Paulo de A.
Published: May 2017

Apresentação - Dossiê
Aspectos dos “Bog Bodies” e do “Culto da cabeça decepada” na Bretanha pré-histórica e romana
Authors: Pinto Renato , Rangel Liszt
Published: May 2017

Religião e práticas mortuárias caminharam de mãos dadas na Bretanha da Idade do Ferro e Romana (Bri­tannia). Tanto as fontes clássicas quanto a cultura material indicam que os bretões desenvolveram algum tipo de culto à água, o que poderia ajudar a explicar a deposição dos corpos das turfeiras (bog bodies). Alguns desses corpos mostram si­nais de ritos sacrificiais, como estrangulamento e decapitação. Outros locais de enterramento na Bretanha contêm corpos decapitados, cujas cabeças estão depositadas em vários locais e posições no túmulo. Crânios decepados são, ainda, encon­trados em poços, fossos e rios. Pode haver em questão um “culto da cabeça decepada”, de alguma conexão com cultos da água, sacrifícios, até mesmo, execuções. Tais práticas obscuras detectadas na Idade do Ferro continuaram, embora de forma duvidosa, na Britannia. Procuraremos ressaltar os principais aspectos de tais costumes e as implicações para o estudo das representações da morte entre os bretões, e da atenção da mí­dia para com o assunto.
Cartago e as transformações da topografia mortuária na Antiguidade tardia (Séc. IV-VII): em busca de conexões novas
Authors: Monpean Rafael A. , Funari Pedro Paulo A.
Published: May 2017

Nosso objetivo neste artigo é abordar as transfor­mações das relações entre as cidades e suas respectivas áreas de sepultamento no decorrer da Antiguidade Tardia (séc. IV-VII) na África do Norte, a partir de um estudo de caso: a cidade de Cartago. Com o apontamento de determinadas mudan­ças materiais, através da interpretação de estudos sobre sítios específicos localizados dentro e fora dos muros de Cartago, intenta-se observar a dinâmica das relações para com a morte e os mortos nesta conjuntura. Assim, sublinha-se a multiplici­dade de abordagens suscitadas pelos estudos da materialidade mortuária.
“Morto pelas mãos do povo”: rituais de execução e justiça popular na Antiguidade Tardia
Authors: Oliveira Julio Cesar Magalhães de
Published: May 2017

O linchamento, enquanto prática da justiça popular, tinha uma longa tradição no mundo romano. Sua constante referência nas fontes textuais da Antiguidade Tardia, porém, parece indicar uma preocupação nova das autoridades e dos autores antigos com suas consequências políticas. O objetivo deste estudo consiste em analisar as características dos linchamentos nas cidades mediterrâneas dos séculos IV e V levando-se em consideração a relação entre justiça popular e justiça oficial, os mecanismos e processos que mais frequentemente conduziam ao linchamento e os objetivos, alvos e motivações dos participantes. Pretende-se demonstrar, em primeiro lugar, como a concepção de “morte justa”, que subjaz a todas as formas de linchamento, ainda revelava a permanência nas cidades do Mediterrâneo das antigas noções de cidadania e de direitos do povo. Ao mesmo tempo, porém, pretende-se sublinhar como o impacto e a ressonância políticas do recurso frequente a esses rituais informais de execução haviam sido modificados (e amplificados) no Império Romano Tardio, tornando-se uma das formas mais características de confronto político no período.
HESÍODO. Os trabalhos e os dias. Edição, tradução, introdução e notas de Alessandro Rolim de Moura. Curitiba: Segesta, 2012.
Authors: Cerdas Emerson
Published: May 2017

Resenha
Pompée et trois comparaisons épiques chez Lucain: éléments érotiques et dialogisme
Authors: Rolim de Moura Alessandro
Published: May 2017

Este artigo trata das comparações com animais empregadas por Lucano para descrever Pompeu ou os pompeianos em três passagens da Guerra Civil (1.327-9, 2.601-7 e 4.237-42). De­fendo a tese de que esses símiles estão fortemente relaciona­dos entre si, bem como a ideia de que pelo menos dois deles possuem elementos que apontam para uma significativa ima­gética erótica. Essas insinuações de caráter sexual são geradas principalmente (mas não apenas) pela presença de conexões intertextuais (especialmente com Vergílio). Também preten­do mostrar que os símiles trazem à tona as limitações de Pom­peu, associando a personagem ou seus seguidores a indícios de violência irracional. As motivações de tal violência, sugere Lucano, têm um lado sexual. O tratamento dado aos sími­les por Lucano é inteiramente dialógico: os diferentes símiles provêm de diferentes vozes e/ou situações, remetem-se uns aos outros por meio de uma série de paralelos às vezes bastante notáveis e oferecem visões contrastantes ou complementares do mesmo assunto.
O ensino de língua latina no Brasil: percursos e perspectivas
Authors: Leite Leni Ribeiro , Castro Marihá Barbosa e
Published: May 2017

Com base em estudos anteriores sobre o  desenvolvimento do ensino básico e superior no Brasil, e como  primeira etapa de um estudo mais amplo acerca das propostas e  perspectivas do ensino de língua latina no Brasil, este trabalho  procurou traçar um panorama do ensino de línguas clássicas,  em especial da língua latina no Brasil, desde o período colonial,  buscando compreender os movimentos que levaram à situação  atual, em que a língua latina ocupa espaço mínimo nos currículos  universitários, em geral apenas dos cursos de Letras. Em seguida,  procurou-se esboçar o quadro atual dos debates na área do ensino  de língua latina na universidade brasileira, apontando-se os  principais desafios enfrentados pelos pesquisadores da área.
Vida herodoteana de Homero: apresentação e tradução
Authors: Werner Christian , Pereira Luiz Guilherme Couto
Published: May 2017

Apresenta-se brevemente, focando-se a constituição da tradição biográfica em torno de Homero no período arcaico, e traduz-se para o português a Vida herodoteana de Homero.
Epicteto: Diatribes I.7 e II.25 – relação entre a lógica e as ações convenientes
Authors: Dinucci Aldo Lopes
Published: May 2017

Apresentamos aqui a tradução comentada de duas diatribes de Epicteto que tocam o tema da lógica, que lançam luz sobre a questão da importância prática dos estudos lógicos para os estoicos, já que, de acordo com o pensamento epicteteano, o homem, para bem agir, precisa deliberar, e a deliberação humana não pode prescindir da razão.
Self-revelation and concealment in Caesar’s De bello Gallico: Cicero, Orgetorix, and the Belgae
Authors: Altman William Henry Furness
Published: May 2017

Building on the work of others who have seen an allusion to the First Triumvirate in the tripartite Gallic conspiracy led by Orgetorix, this article shows how Caesar reveals himself as formidable between the lines of De bello Gallico, and particularly in its famous opening.
Pólis: comunidade, política e a vida em comum numa leitura da Política de Aristóteles
Authors: Andrade Marta Mega de
Published: May 2017

Considero neste artigo um contexto ateniense para a primeira teoria política grega entre o final do V e meados do IV século, discutindo que tipo de “filosofia” sobre as práticas dos cidadãos precedem a teoria e como se desdobra, então, a chamada “teoria” na Política, de Aristóteles. Esse contexto, tanto no âmbito das escolas filosóficas quanto na produção escrita da Atenas clássica, deve nos auxiliar – dentro das limitações desse artigo dedicado a uma leitura histórica da Política, de Aristóteles – a explorar e contribuir para uma concepção da pólis como comunidade política,  na medida que considero a noção de comunidade política calcada em Aristóteles muito diferente da nossa noção de estado ou de cidade-estado, como espero poder demonstrar. Em terceiro lugar, gostaria de apontar algumas implicações da abertura da noção de vida comum (koinós), o que significa sua distinção das amarras com as quais costumamos prendê-la à polis ao identificar o "público" (pólis) com o koinos (interesse comum) e o "privado" (oikos) com o idios (interesse particular). Indico desde já que considero essas implicações como um subproduto dos argumentos do autor da Política, e não sua tarefa consciente ou principal. E espero poder demonstrar que a importância do koinos para a compreensão da polis coloca-nos em presença de mais agentes no espaço político do que simplesmente o grupo de cidadãos que “governa”, ou seja, que “pratica a pólis”.
A phýsis no Corpus hippocraticum: proposta de dois temas para o mesmo objeto
Authors: Cairus Henrique F. , Alsina Julieta
Published: May 2017

O conceito de phýsis no Corpus hippocraticum parece ter dois níveis: um mais e outro menos específico. Nas passagens em que o termo phýsis não apresenta qualquer determinante ou adendo, o conceito é menos específico. Ele é mais específico, no entanto, quando o termo leva consigo adjuntos como “do homem”, “da criança”, “da mulher”, etc. Apesar de parecer esta uma questão dicotômica, há razões para crer que ela possui maior complexidade. Isto nos motivou a apresentar algumas questões que expõem um espectro bem mais amplo do conceito de phýsis, em detrimento da mera abordagem binária. Para além da complexidade conceitual que ronda a ideia de phýsis, o artigo leva em conta ainda o nível discursivo (talvez mesmo retórico). Neste âmbito, o conceito de phýsis é problematizado a partir da fricção entre enunciação e enunciado. Abstract The concept of phýsis in the Hippocratic corpus seems to have two levels: one of them more and the other less specific. In the passages in which the term phýsis does not show any determiner or addition, the concept is less specific. It is more specific, however, when the term take complements as “of man”, “of child”, “of women” etc. Though it seems a dichotomic issue, there are reasons to believe that it bears more complexity. It has instigated us to present some issues that expose a much wider spectrum of the concept of phýsis rather than the binary account. Beyond the conceptual complexity which surrounds the idea of phýsis, this article considers the discursive (perhaps even rhetoric) level. In this account, the concept of phýsis is examined out of friction between enunciation and enunciated.
On the Homeric Hymns and Prayer
Authors: Abritta Alejandro
Published: May 2017

The purpose of this paper is to study the possible relation between prayer and the long Homeric Hymns. The analysis centers on the beginnings and endings of these compositions, in which two of the traditional parts of prayer are found. The paper opens with a brief account of the problem, its goals and methodology. Then, after a general introduction on hymnody and prayer, the author analyzes two hymns, the Homeric Hymn to Delian Apollo and the Homeric Hymn to Hermes, in order to show that in these compositions there is a development of the beginning, the invocatio, and of the ending, the request. The goal is to prove that there is an attentive expansion of the basic elements of these sections, and therefore that these poems were actual cultic compositions to achieve the good will (χάρις) of the gods.
Emozione e realtà nell’immagine di Platone
Authors: Botter Barbara
Published: May 2017

In Platone, l’immagine è rappresentazione pervasa di emozione. Non esiste immagine, neppure una semplice copia, che non contenga un’emozione e non esiste una pittura, neppure la più astratta, che non rappresenti un’idea. Il fine del presente articolo è di proporre una lettura e interpretazione del concetto di immagine in Platone, che mantenga vivi i due aspetti costitutivi dell’immagine, la carica emotiva e il riferimento al contenuto reale di cui l’immagine è rappresentazione. Il testo è diviso in tre sezioni: nella prima e nella seconda sezione indago lo statuto ontologico dell’immagine e la sua relazione con l’archetipo; nella terza parte propongo una interpretazione della funzione dell’immagine in Platone e in alcuni passi della letteratura greca antica.
Breve ensaio bibliográfico em torno da obra de Gregory Vlastos (À guisa de manifesto)
Authors: Flores Junior Olimar
Published: May 2017

Este artigo apresenta, de forma breve e concisa, o percurso intelectual de Gregory Vlastos (1907-1991), com ênfase na sua extensa e variada produção escrita e na dependência – que constitui um verdadeiro método – entre esta e as suas intervenções orais, na forma de cursos, seminários e conferências em diversas instituições da Europa e da América. Pretende-se, a partir da trajetória deste que é reconhecidamente um dos mais importantes historiadores da filosofia antiga do último século, ensejar uma reflexão sobre as condições de execução e os modos de avaliação e aferição de qualidade do trabalho acadêmico.
Vlastos e a escravidão em Platão
Authors: Haddad Alice Bitencourt
Published: May 2017

Vlastos, num artigo intitulado “Slavery in Plato’s Thought”, sustenta, entre outras coisas, a tese de que Platão teria influenciado Aristóteles em sua defesa da escravidão natural, considerando a relação entre governantes e governados na cidade excelente da República um exemplo que se conformaria a essa doutrina. Há, entretanto, vários indícios que o desmentem, tais como a associação da sōphrosynē à harmonia entre os cidadãos, que têm uma opinião comum sobre quem deve governar, além da frequente vinculação da escravidão a violência, tirania e sujeição, o que contradiz a qualificação de virtuosa e amigável douleia, suposta por Vlastos e atribuída a Platão.
Gregory Vlastos y los estudios sobre el Sócrates histórico
Authors: Atienza Carmen Trueba
Published: May 2017

Este artigo discute a abordagem de Sócrates por Gregory Vlastos em “The historical Socrates and Athenian Democracy”, trabalho publicado na revista Political Theory (1983), e sua repercussão.
Vlastos e a noção platônica de ser
Authors: Araújo Carolina
Published: May 2017

Este artigo é sobre o significado de ser em Platão de acordo com Gregory Vlastos e suas consequências para a chamada teoria das ideias. Analisam-se aqui as premissas de sua interpretação do argumento do terceiro homem com o objetivo de discutir a teoria dos graus da realidade em relação ao problema da autopredicação. Neste contexto está implícita uma mudança na posição Vlastos, testemunhada sobretudo por sua posterior hipótese sobre a predicação paulina. Esta mudança revelaria – embora isso Vlastos nunca tenha aceitado – que Platão não se compromete com a autopredicação, o que exigiria uma reavaliação da teoria das ideias.
A revisão dos argumentos na Politeía V: Vlastos e o feminismo em Platão
Authors: Santos Magda Guadalupe dos
Published: May 2017

As análises de Gregory Vlastos sobre os textos dos Antigos são aqui trazidas ao primeiro plano em moldes de analogia. Seus estudos sobre Platão nos propiciam uma abertura dialógica inclusive às considerações e estudos feministas surgidos nas últimas décadas. Este trabalho propõe refletir acerca da passagem 456b que versa sobre a mulher filósofa ou inimiga da filosofia (philósophós te kaì misósophos) e que bem realça o campo normativo desenvolvido por Platão em Politeía V. Na preocupação pela cidade justa, explorando os efeitos de uma paridade de funções entre os gêneros, Platão nos incita a investigar o teor de seriedade da questão, considerando a própria Politeía e sua recepção na análise contemporânea. Tomam-se as análises de Vlastos como suporte interpretativo de tais questões.
A culpa do chefe Atrida: uma abordagem no Agamémnon de Séneca
Authors: Santos Alexandra Coelho dos
Published: May 2017

Pretende este artigo centrar-se em alguns aspetos que envolvem a figura de Agamémnon na tragédia homónima de Séneca, tanto no plano temático como no plano simbólico, abarcando a questão da dimensão hereditária do crime, a morte de Ifigénia e a ligação do chefe Atrida a Cassandra, elementos que despoletam o furor de Clitemnestra e que culminará com a morte de Agamémnon no banquete ímpio. Não podendo dissociar esta tragédia da filosofia estóica, será objeto de reflexão a ação das personagens na sua busca dos valores do sapiens estóico.
A mulher na Magna Grécia : um “objeto” de valor
Authors: Dos Santos Sandra Ferreira
Published: May 2017

Uma questão que tem sido motivo de grandes debates no estudo das colônias gregas do sul da Itália, trata da formação dos grupos de imigrantes gregos que se dirigiram para esta região, no movimento que se convencionou chamar de colonização grega. Considerando-se as fontes, parece mais razoável considerar que os homens que para lá se dirigiram, se casassem com mulheres nativas, realizando, assim, alianças com a população local. As alianças matrimoniais, bastante comuns no mundo grego, tornaram-se, na Magna Grécia, uma política de manutenção e consolidação do poder pelos tiranos da região, e como uma forma bastante eficaz de legitimação da permanência e da descendência dos gregos que chegavam. Esta questão é fundamental, na medida em que desejamos pensar sobre a importância das mulheres na formação da identidade do grupo e na legitimação política e social dos gregos que se estabeleceram no sul da Itália.
Passado e presente: Sicília e Mileto, Roma e Afrodísias no romance de Cáriton
Authors: Duarte Adriane da Silva
Published: May 2017

Quéreas e Calírroe, romance de Cáriton de Afrodísias (I d.C.), tem como ponto de partida e de retorno do par protagonista a cidade de Siracusa, na Sicília do início do século IV a.C.. Uma parte considerável da ação, contudo, se passa em Mileto, para onde se desloca a heroína. Procura-se investigar aqui as razões dessa opção de Cáriton, que já na primeira sentença de sua obra proclama sua nacionalidade, alertando o leitor que o autor é um grego que vive na periferia do império romano. A hipótese é que a escolha por situar a ação do romance no passado reflita menos a emulação do relato historiográfico, especialmente o de Tucídides, mas antes uma estratégia para tratar indiretamente da relação entre Afrodísias e Roma no presente.
Homero nos poetas líricos: recepção e transmissão
Authors: Kelly Adrian
Published: May 2017

A pesquisa acadêmica sobre Homero está crescentemente inclinada a usar um modelo estematológico para explicar a relação do poeta com seus predecessores, sejam gregos ou não gregos: isto é, Homero aparentemente usou poemas escritos e fixos na maneira alusiva de Calímaco ou Virgílio. Todavia, à parte seus profundos problemas metodológicos, essa concepção da cultura poética grega não encontra paralelo ou apoio na recepção de Homero nos poetas líricos arcaicos gregos mais antigos: não há nestes uma boa evidência de uma cultura literária altamente alusiva até a metade do séc. VI a.C., na poesia de Estesícoro, cuja obra representa uma clara mudança no modo como os textos homéricos são conhecidos, recebidos e recriados. ‘Não há Virgílios’ na Grécia arcaica, e a concepção não tem lugar na história da literatura grega mais antiga.[Artigo traduzido por Antonio Orlando Dourado-Lopes]
Postpericardiotomy syndrome and its complications: prevalence, clinical significance and management
Authors: Kudaiberdiev Taalaibek
Published: May 2017

In this review, we summarized current evidence on clinical significance, outcomes and management of postpericardiotomy syndrome and its complications developing after cardiac operations.
Development of Strategies for Infection Prevention and Control in Hospital Setting: Bangladesh Perspectives
Authors: Shamsuzzaman Abul Khair M.
Published: May 2017

Abstract not availableBangladesh Journal of Infectious Diseases, 2015;2(1):1-2
Diagnostic Microbiology: Present Status and Future Prospect
Authors: Begum Shahanara , Yusuf Md. Abdullah , Uddin Bhuiyan Mohammad Mahtab
Published: May 2017

Diagnostic Microbiology is the tool that makes it possible to identify the exact pathogens of infectious diseases and the most optimal therapy at the level of individual patients. Conventional methods require time to grow the microbes in vitro under specific conditions and not all microbes can easily be cultured. This is followed by biochemical methods for identification which further makes the process lengthy. Transport of the specimens under less than ideal conditions, prior use of antibiotics and small number of organisms are among the factors that render culture-based methods less reliable. Newer methods depend on amplification of nucleic acids followed by use of probes for identification. This mitigates the need for higher microbial load, presence of metabolically active viable organisms and shortens the time. These methods can be used to detect antibiotic resistance genes directly from the specimen and help direct targeted therapy with efficacy. Since these methods will not fulfill all the diagnostic needs, a second approach is being used to shorten the time to identification after the organism has already grown. Mass spectrometry and bioinformatics are the tools making this possible. This review gives a historical perspective on diagnostic microbiology, discusses the pitfalls of current methodology and provides an overview of newer and future methods.Bangladesh Journal of Infectious Disease 2015;2(2):42-47
A Decade of Progress toward Ending the Intensive Confinement of Farm Animals in the United States
Authors: Shields Sara , Shapiro Paul , Rowan Andrew
Published: May 2017

In this paper, the Humane Society of the United States (HSUS) farm animal protection work over the preceding decade is described from the perspective of the organization. Prior to 2002, there were few legal protections for animals on the farm, and in 2005, a new campaign at the HSUS began to advance state ballot initiatives throughout the country, with a decisive advancement in California (Proposition 2) that paved the way for further progress. Combining legislative work with undercover farm and slaughterhouse investigations, litigation and corporate engagement, the HSUS and fellow animal protection organizations have made substantial progress in transitioning the veal, pork and egg industries away from intensive confinement systems that keep the animals in cages and crates. Investigations have become an important tool for demonstrating widespread inhumane practices, building public support and convincing the retail sector to publish meaningful animal welfare policies. While federal legislation protecting animals on the farm stalled, there has been steady state-by-state progress, and this is complemented by major brands such as McDonald’s and Walmart pledging to purchase only from suppliers using cage-free and crate-free animal housing systems. The evolution of societal expectations regarding animals has helped propel the recent wave of progress and may also be driven, in part, by the work of animal protection organizations.
The Importance of NADPH Oxidases and Redox Signaling in Angiogenesis
Authors: Prieto-Bermejo Rodrigo , Hernández-Hernández Angel
Published: May 2017

Eukaryotic cells have to cope with the constant generation of reactive oxygen species (ROS). Although the excessive production of ROS might be deleterious for cell biology, there is a plethora of evidence showing that moderate levels of ROS are important for the control of cell signaling and gene expression. The family of the nicotinamide adenine dinucleotide phosphate oxidases (NADPH oxidases or Nox) has evolved to produce ROS in response to different signals; therefore, they fulfil a central role in the control of redox signaling. The role of NADPH oxidases in vascular physiology has been a field of intense study over the last two decades. In this review we will briefly analyze how ROS can regulate signaling and gene expression. We will address the implication of NADPH oxidases and redox signaling in angiogenesis, and finally, the therapeutic possibilities derived from this knowledge will be discussed.
Facile Synthesis of α-MnO2 with a 3D Staghorn Coral-like Micro-Structure Assembled by Nano-Rods and Its Application in Electrochemical Supercapacitors
Authors: Bing Yonghong , Zhang Lei , Mu Shichun , Zhang Jiujun
Published: May 2017

Abstract: Manganese oxides with an alpha crystal structure are synthesized via combined solid-state reaction and wet chemical processing, which is a simple and inexpensive synthetic route easy for mass production. The effects of the synthetic reaction duration and the temperature of acid treatments on crystal structure, morphology, and electrochemical capacitive properties of α-MnO2 are discussed. It is evidenced that the samples treated in acid for a longer time at 25 °C display the uniform nanorods that are aggregated to form micro-buildings with fine features on the surface of rods. This microstructure possesses large surface areas and more active sites that are easy to access electrochemically, leading to a better electrochemical capacitive performance. We expected that these results would provide the practical information for shape- and morphology-controlled synthesis for nanostructured functional materials in supercapacitor applications.
Automated Bioanalyzer Based on Amperometric Enzymatic Biosensors for the Determination of Ethanol in Low-Alcohol Beers
Authors: Vargas Eva , Conzuelo Felipe , Ruiz M. , Campuzano Susana , Ruiz-Valdepeñas Montiel Víctor , González de Rivera Guillermo , López-Colino Fernando , Reviejo Á. , Pingarrón José
Published: May 2017

In this work, a new automated bioanalyzer based on the use of enzymatic biosensors as amperometric detectors is reported. This automatic bioanalyzer is configurable both as continuous flow and flow injection analysis systems and enables both on-line and off-line monitoring of ethanol in low-alcohol beer to be performed. The attractive analytical and operational characteristics demonstrated by the automated bioanalyzer make it a promising, simple, rapid, and reliable tool for quality control of this beverage in the beer industry, either during the manufacturing process or in the final product. Moreover its applicability to the analysis of the ethanol content in different non-alcoholic beers working at different modes was successfully demonstrated.
Structure-Dependent Photocatalytic Performance of BiOBrxI1−x Nanoplate Solid Solutions
Authors: Xu Huan-Yan , Han Xu , Tan Qu , He Xiu-Lan , Qi Shu-Yan
Published: May 2017

BiOXxY1−x (X, Y = Cl, Br, and I) solid solutions have been regarded as promising photocatalysts attributed to their unique layered structure, tunable band structure, and chemical and optical stability. In this study, BiOBrxI1−x nanoplate solid solutions with a high exposure of {001} crystal facets were prepared by a facile alcoholysis method at room temperature and atmospheric pressure. X-ray diffraction (XRD) peaks exhibited a slight shift to lower diffraction angle with the increase of I content in BiOBrxI1−x samples, which resulted in a gradual increase in their cell parameters. Field emission scanning electron microscopy (FESEM) and transmission electron microscope (TEM) images revealed that BiOBrxI1−x samples exhibited 2D plate-like structure with the in-plane wrinkles. The regular changes in optical absorption threshold and Eg value seen in UV-vis diffuse reflectance spectra (UV-vis DRS) indicated that the optical absorption property and band structure could be modulated by the formation of BiOBrxI1−x solid solutions. The photocatalytic degradation of active dye Rhodamine B (RhB) over BiOBrxI1−x solid solutions showed that BiOBr0.75I0.25 had the best photocatalytic activity. The RhB photodegradation processes followed a pseudo-first-order kinetic model. The synergistic effect of structural factors (including amount of exposed {001} facets, interlayer spacing of (001) plane, and energy-level position of the valence band) determined the photocatalytic performance of BiOBrxI1−x solid solutions.
Catalytic Performance of MgO-Supported Co Catalyst for the Liquid Phase Oxidation of Cyclohexane with Molecular Oxygen
Authors: Wu Mingzhou , Fu Yu , Zhan Wangcheng , Guo Yanglong , Guo Yun , Wang Yunsong , Lu Guanzhong
Published: May 2017

A highly-efficient and stable MgO-supported Co (Co/MgO) catalyst was developed for the oxidation of cyclohexane with oxygen. The effects of the Co loading and support on the catalytic activity of the supported Co3O4 catalyst were investigated. The results show that the Co supported on MgO presented excellent activity and stability. When the Co/MgO catalyst with the Co content of 0.2 wt% (0.2%Co/MgO) was used, 12.5% cyclohexane conversion and 74.7% selectivity to cyclohexanone and cyclohexanol (KA oil) were achieved under the reaction conditions of 0.5 MPa O2 and 140 °C for 4 h. After being repeatedly used 10 times, its catalytic activity was hardly changed. Further research showed that the high catalytic performance of the 0.2%Co/MgO catalyst is attributed to its high oxygen-absorbing ability and the high ratio between the amount of weak and medium base sites with the help of the synergistic interaction between Co and MgO.
Effective Electron Transfer Pathway of the Ternary TiO2/RGO/Ag Nanocomposite with Enhanced Photocatalytic Activity under Visible Light
Authors: Tian Hongwei , Wan Chenxing , Xue Xin , Hu Xiaoying , Wang Xiaoyi
Published: May 2017

Mesoporous TiO2/reduced graphene oxide/Ag (TiO2/RGO/Ag) ternary nanocomposite with an effective electron transfer pathway is obtained by an electrostatic self-assembly method and photo-assisted treatment. Compared with bare mesoporous TiO2 (MT) and mesoporous TiO2/RGO (MTG), the ternary mesoporous TiO2/RGO/Ag (MTGA) nanocomposite exhibited superior photocatalytic performance for the degradation of methylene blue (MB) under visible light, and the degradation rate reached 0.017 min−1, which was 3.4-times higher than that of MTG. What is more, the degradation rate of MTGA nanocomposite after three cycle times is 91.2%, and the composition is unchanged. In addition, we found that the OH•, h+ and especially O2•− contribute to the high photocatalytic activity of MTGA for MB degradation. It is proposed that Ag nanoparticles can form the local surface plasmon resonance (LSPR) to absorb the visible light and distract the electrons into MT, and RGO can accept the electrons from MT to accelerate the separation efficiency of photogenerated carriers. The establishment of MTGA ternary nanocomposite makes the three components act synergistically to enhance the photocatalytic performance.
Numerical Simulation of the Laminar Forced Convective Heat Transfer between Two Concentric Cylinders
Authors: Sarbu Ioan , Iosif Anton
Published: May 2017

The dual reciprocity method (DRM) is a highly efficient numerical method of transforming domain integrals arising from the non-homogeneous term of the Poisson equation into equivalent boundary integrals. In this paper, the velocity and temperature fields of laminar forced heat convection in a concentric annular tube, with constant heat flux boundary conditions, have been studied using numerical simulations. The DRM has been used to solve the governing equation, which is expressed in the form of a Poisson equation. A test problem is employed to verify the DRM solutions with different boundary element discretizations and numbers of internal points. The results of the numerical simulations are discussed and compared with exact analytical solutions. Good agreement between the numerical results and exact solutions is evident, as the maximum relative errors are less than 5% to 6%, and the R2-values are greater than 0.999 in all cases. These results confirm the effectiveness and accuracy of the proposed numerical model, which is based on the DRM.
Phase Transition Behavior of the Layered Perovskite CsBi0.6La0.4Nb2O7: A Hybrid Improper Ferroelectric
Authors: Dixon Charlotte , McNulty Jason , Knight Kevin , Gibbs Alexandra , Lightfoot Philip
Published: May 2017

The phase behavior of the layered perovskite CsBi0.6La0.4Nb2O7, of the Dion-Jacobson family, has been studied by high-resolution powder neutron diffraction between the temperatures of 25 < T < 850 °C. At ambient temperature, this material adopts the polar space group P21am; this represents an example of hybrid improper ferroelectricity caused by the interaction of two distinct octahedral tilt modes. Within the limits of our data resolution, the thermal evolution of the crystal structure is consistent with a first-order transition between 700 and 750 °C, with both tilt modes vanishing simultaneously, leading to the aristotype space group P4/mmm. This apparent “avalanche transition” behavior resembles that seen in the related Aurivillius phase SrBi2Nb2O9.
Prediction and Evaluation of Zero Order Entropy Changes in Grammar-Based Codes
Authors: Vasinek Michal , Platos Jan
Published: May 2017

The change of zero order entropy is studied over different strategies of grammar production rule selection. The two major rules are distinguished: transformations leaving the message size intact and substitution functions changing the message size. Relations for zero order entropy changes were derived for both cases and conditions under which the entropy decreases were described. In this article, several different greedy strategies reducing zero order entropy, as well as message sizes are summarized, and the new strategy MinEnt is proposed. The resulting evolution of the zero order entropy is compared with a strategy of selecting the most frequent digram used in the Re-Pair algorithm.
Classification of Fractal Signals Using Two-Parameter Non-Extensive Wavelet Entropy
Authors: Ramírez-Pacheco Julio , Trejo-Sánchez Joel , Cortez-González Joaquin , Palacio Ramón
Published: May 2017

This article proposes a methodology for the classification of fractal signals as stationary or nonstationary. The methodology is based on the theoretical behavior of two-parameter wavelet entropy of fractal signals. The wavelet ( q , q ′ ) -entropy is a wavelet-based extension of the ( q , q ′ ) -entropy of Borges and is based on the entropy planes for various q and q ′ ; it is theoretically shown that it constitutes an efficient and effective technique for fractal signal classification. Moreover, the second parameter q ′ provides further analysis flexibility and robustness in the sense that different ( q , q ′ ) pairs can analyze the same phenomena and increase the range of dispersion of entropies. A comparison study against the standard signal summation conversion technique shows that the proposed methodology is not only comparable in accuracy but also more computationally efficient. The application of the proposed methodology to physiological and financial time series is also presented along with the classification of these as stationary or nonstationary.
Assessment of Large Scale Photovoltaic Power Generation from Carport Canopies
Authors: Alghamdi Abdulsalam , Bahaj AbuBakr , Wu Yue
Published: May 2017

Reliance on fossil fuel-driven energy supply is a major contributor to global emissions. In order to stay within the Paris Agreement’s temperature rise limits, current and growing energy consumption will need to be significantly underpinned by deployment of low/non-carbon power generation. This work promotes power generation at the megawatt scale from solar photovoltaics (PV) systems deployed in untapped car parking areas, which are estimated to represent up to ~6.6% of the urban footprint within cities. The methodology developed is globally applicable to support PV development, including site selection and PV array configuration. It is underpinned by a case study in a university campus, which has a similar footprint as assigned in cities for vehicle parking. The methodology demonstrates that less than 1% of the available parking spaces are affected by shadows from surrounding buildings or vegetation. The work shows that by utilising such parking areas within the selected campus a PV installation with a capacity of ~36.4 MWp, which can generate ~66.2 GWh of electricity annually, would be feasible. Financial analysis based on multiple scenarios indicates that a 50% return on investment is achievable over 25 years at an export tariff of USD ¢4.5/kWh, which is commensurate with the latest granted bids for a similar export tariff.