1,721,232 research outputs found
GABRIEL MARQUES (1892-1980), CRONISTA DA SUB-HUMANIDADE
Get PDFO artigo apresenta a trajetória do escritor paulista esquecido Gabriel Marques (1892-1980) e busca compreender seu lugar na tradição literária brasileira. O subtítulo do artigo é retirado de uma entrevista de Afonso Schmidt (1950), que descreve o escritor como um “cronista da sub-humanidade”, empenhado em descrever as tragédias e misérias do cotidiano da urbe paulistana. Propomos que Gabriel Marques foge a enquadramentos pré-estabelecidos das “escolas literárias” (romantismo x realismo), representando uma modalidade híbrida de narrativa moderna e bastante popular no começo do século XX, moldada a partir da mistura de várias tradições, incluindo o gótico-romantismo, o naturalismo científico e a imprensa policial e sensacionalista. Para explorar as vertentes reconhecíveis na literatura do escritor, seus temas e técnicas, estudamos dois contos de seu volume de estreia, Os condenados: contos atrozes (1922): “Os condenados” e “Os espelhos”
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Recapacitação e renovação de subestações: aspectos relacionados a equipamentos, confiabilidade e arranjo físico
Get PDFAging and obsolescence are factors that occur throughout the Brazilian electrical
system, which is why the modernization of substations is inevitable. It is important to
highlight that the electrical systems in Europe and in Japan have gone through this
process in recent years, and it is inevitably already taking place in the National
Interconnected System – NIS. Substations must also be renewed when the network
parameters (short circuit current, rated current, voltage, etc.) change. This is due to
changes in the transmission network, or when you want to improve the substation's
reliability.
The adoption of new project assumptions, specially in the electricity sector, faces
several barriers in the market, whether due to lack of knowledge of the technology, to
public notice requirement or to project standardization. During the circuit breaker
technology upgrade process, for example, the design engineers probably
encountered the same difficulties.
When faced with the need to upgrade the substation or the need to replace
equipment, an engineer with little experience will probably specify equipment equal to
the existing one, without making a more accurate analysis of the subject, considering
a long-term horizon and new technologies.
This work aims to propose a methodology for assessing the need and/or the
convenience of carrying out the refurbishment of transmission substations (known by
the terms: uprating and upgrading), through a case study, highlighting the main
points that should be observed by all professionals involved in the project, supporting
the expansion and planning of such systems with relevant decisions.O envelhecimento e a obsolescência são fatores que ocorrem em todo o sistema
elétrico brasileiro, sendo, por isso, inevitável a modernização das subestações. É
importante destacar que os sistemas elétricos da Europa e do Japão passaram por
este processo em anos recentes, e, inevitavelmente, o mesmo já está ocorrendo no
Sistema Interligado Nacional – SIN. As subestações devem ser renovadas também,
quando os parâmetros da rede (corrente de curto circuito, corrente nominal, tensão,
etc.) mudam. Tal necessidade de atualização ocorre devido às mudanças na rede de
transmissão, ou ainda, quando se deseja melhorar a confiabilidade da subestação.
A adoção de novas premissas de projeto, em especial no setor elétrico, encontra
diversas barreiras no mercado, seja por falta de conhecimento da tecnologia, seja
por requisito de edital ou por padronização de projeto. Durante o processo de
atualização tecnológica dos equipamentos de alta tensão, como os disjuntores, por
exemplo, provavelmente os engenheiros de projeto enfrentaram as mesmas
dificuldades.
Ao se deparar com a necessidade de atualização da subestação ou de substituição
de um equipamento, provavelmente um engenheiro com pouca experiência
especificará um equipamento igual ao existente, sem fazer uma análise mais
apurada do assunto considerando um horizonte de longo prazo e novas tecnologias.
Este trabalho tem por objetivo propor uma metodologia para a avaliação da
necessidade e/ou da conveniência da realização de recapacitação, ou
modernização, de subestações de transmissão (conhecida pelos termos: uprating e
upgrading), através de um estudo de caso, destacando os principais pontos que
devem ser observados por todos os profissionais envolvidos no projeto, subsidiando
com decisões relevantes a expansão e planejamento de tais sistemas
Análise termoeconômica de uma central de ciclo combinado de 826 mw - estudo de caso utilizando um simulador full-scope
Get PDFCombined cycle power plants are increasing their role in the electricity generation
worldwide. These plants stand out for their higher efficiency, lower electricity production costs
and relatively low greenhouse gas emissions. In Brazil, a country with mostly renewable energy
generation, these plants have been increasing their participation in electricity production. It is
noteworthy that combined cycle power plants can show off as an alternative to diversify the
Brazilian energy matrix and increase the reliability of the system, preventing supply crisis just
like happened in the past. In this context, this works performs an energetic, exergetic and
exergoeconomic analysis of a combined cycle power plant, using a full-scope simulator, which
digitally and faithfully reproduces the operation of the EDF Norte Fluminense Power Plant,
located in Macaé-RJ. Briefly, the simulator presents an exact duplicate of the real power plant
and its operation is identical to the operation of the EDF Norte Fluminense Power Plant.
The results show that the energy efficiency of the studied plant is equal to 51.47% and
the exergetic efficiency is equal to 49.25%. In addition, it was found that the equipment parts
that are responsible for the main irreversibilities are: combustion chamber, gas turbines and
heat recovery steam generators. From the exergoeconomic analysis, it was found that the cost
of electricity production, for the base case, was calculated to be 0.3891 R/MWh, o que é 10%
inferior ao CVU calculado pela ANEEL para a usina em questão. Por fim, verificou-se que,
quanto maior o tempo de operação anual da usina, menor o custo de produção de eletricidade,
o que pode motivar a construção de novas usinas de ciclo combinado para operar na base do
sistema elétrico brasileiro, reduzindo a dependência de hidrelétricas e proporcionando ao
consumidor tarifas inferiores àquelas observadas nas operações de térmicas convencionais
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