1,721,014 research outputs found
Excitatory synaptic transmission in purkinje cells of glutamate transporter EAAC-1 and GLAST-1 knock-out mice
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RAZÕES TRIGONOMÉTRICAS NO TRIÂNGULO RETÂNGULO: UMA ANÁLISE DE ERROS NO ENSINO MÉDIO
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Previous issue date: 2012-01-06Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorThis research aimed to analyze errors made by high school students to solve problems
involving trigonometric reasons in the rectangle triangle and plan activities to remediate them.
We also seek to collect the opinions of teachers about such errors, through a questionnaire
applied to them. The investigation was carried out with students from second year of high
school in the city of Quevedos, RS. The errors made by the students in response to a test were
categorized separately for each question. We analyzed 11 public school teachers and 58 high
school students. Thirty-three students answered these questions and, further, 25 other students
made some activities on Trigonometry, in order to verify if these students also had difficulties
in solving such issues. In the final stage of this research participated 12 students of the Youth
and Adults Education (EJA) who tested the activities that had been proposed as final product
of this dissertation. By the number of occurrences in each class of errors, it was noted that the
students have many difficulties related to the identification of the names of the sides of a
triangle and to the knowledge of trigonometric relationships defined therein. Teachers who
responded to the survey have generally considered that the difficulties of the students are
related to the lack of attention and knowledge prerequisites. All the teachers work in public
schools in Quevedos as well in the neighboring city, Santa Maria, RS. Based on the opinions
and suggestions made by the teachers, we created a Webquest as final product of this
research, with a sequence of activities that aim to overcome the difficulties presented by the
students.Esta pesquisa teve como objetivo analisar os erros cometidos pelos alunos do Ensino Médio
na resolução de problemas que envolvem razões trigonométricas no triângulo retângulo e
planejar atividades para remediá-los. Também procuramos coletar as opiniões de professores
sobre tais erros, por meio de um questionário a eles aplicado. A investigação realizou-se com
estudantes do 2º ano do Ensino Médio de uma escola pública, no município de Quevedos, RS.
Os erros cometidos pelos alunos nas respostas a um teste foram categorizados separadamente
para cada questão. Participaram desta pesquisa 11 professores de escolas públicas e 58 alunos
de Ensino Médio. Trinta e três desses alunos responderam às questões e, posteriormente, 25
realizaram algumas atividades sobre Trigonometria, com intuito de verificar se esses
estudantes também tinham dificuldade para resolver tais questões. Na etapa final da pesquisa,
também participaram 12 alunos da Educação de Jovens e Adultos (EJA) que testaram as
atividades que foram propostas como produto final desta dissertação. Pelo número de
ocorrências em cada classe de erros, notou-se que os alunos têm muitas dificuldades
relacionadas à identificação da nomenclatura dos lados de um triângulo retângulo e ao
conhecimento das relações trigonométricas nele definidas. Os professores que responderam à
pesquisa consideraram, em geral, que as dificuldades são relacionadas à falta de atenção e de
conhecimentos pré-requisitos. Todos os professores trabalham em escolas públicas de
Quevedos, bem como no município vizinho, Santa Maria, RS. A partir das opiniões e
sugestões apresentadas pelos docentes, foi elaborada uma Webquest como produto final desta
pesquisa, com uma sequência de atividades que visam superar as dificuldades apresentadas
pelos estudantes
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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