1,723,525 research outputs found
Linked collectors and determiners for: Amphi-Indian Ocean Disjunction in the Trans-Pacific Genus Archaeoglenes Brown (Coleoptera: Tenebrionidae: Phrenapatinae): New Taxonomic and Distributional Data.
No full textNatural history specimen data linked to collectors and determiners held within, "Amphi-Indian Ocean Disjunction in the Trans-Pacific Genus Archaeoglenes Brown (Coleoptera: Tenebrionidae: Phrenapatinae): New Taxonomic and Distributional Data". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/3574f6e2-f633-43f4-8079-53cc3eee22eb">https://bionomia.net/dataset/3574f6e2-f633-43f4-8079-53cc3eee22eb</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/3574f6e2-f633-43f4-8079-53cc3eee22eb">https://gbif.org/dataset/3574f6e2-f633-43f4-8079-53cc3eee22eb</a>. Formatted as a Frictionless Data package
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Study on Microstructure and properties of melting and casting and hot rolling process of 8079 high precision aluminum foil stock
Full text link本文以8079高精铝箔坯料的工艺流程为主线，结合自身在A公司近20年的工作经验和材料科学理论，采用ICP、Alscan在线测氢、金相显微分析、拉伸试验、TEM、SEM、EDS和离线板形检测仪等现代材料分析测试技术，同时运用SPSS软件对测试数据进行统计分析，研究不同制备工艺对铸造组织、均热组织和热轧形变组织的形成规律，以改善8079高精铝板坯的轧制性能和力学性能，使国内企业早日用8079合金替代1235合金生产高品质的双零铝箔提供应用数据，具有一定的理论和实际应用价值。研究工作及结果如下： ⑴优化8079的成分，测试铝板坯的轧制性能和力学性能，采用SPSS软件分析测试数据，研究成分对性能的影...This paper takes the process of 8079 high precision aluminum foil stock as the main line of research based on 20 years of experience working in the company and material science theory, using ICP, Alscan online analysis and testing technology for hydrogen measurement, metallographic analysis, tensile test, TEM, SEM, EDS, off- line plate shape detector and other modern materials analysis and testing...学位：工程硕士院系专业：材料学院_材料工程学号：X201219301
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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
Characterization of aluminum alloy 8079 and 3003 obtained by the Twin Roll Caster process and H19 temper used in radiator fins
No full textNos dias atuais o mercado automotivo está cada vez mais competitivo e componentes mais leves e que promovam um melhor desempenho do automóvel é bem vindo. Esse trabalho estudou a possibilidade de redução de peso do radiador, substituindo a liga 8079 pela a liga 3003. Atualmente as bobinas primárias para fabricação de aletas são obtidas pelo processo de laminação contínua (twin roll caster - TRC). Este processo converte o alumínio líquido diretamente em bobinas sólidas em uma única etapa. Após esse processo, o metal ainda está muito espesso e sem nenhum controle no acabamento. As bobinas das ligas 8079 e 3003 produzidas por este processo representam um material atrativo para a aplicação em aletas de radiador. O foco deste trabalho é o estudo das propriedades mecânicas e textura de duas ligas 8079 e 3003 tratadas com têmpera H19, e mesmas etapas do processo de estampagem de aletas utilizadas nos radiadores de água oriundas do processo de fabricação de alumínio expandido, além de avaliar a melhor liga para essa aplicação. A composição química foi determinada por absorção atômica, e a microestrutura foi determinada por microscopia ótica. Os ensaios mecânicos determinaram limite de ruptura, escoamento e alongamento em amostras preparadas em ângulos de zero, 45 e 90 graus em relação à direção de laminação e que foram utilizados para avaliar o coeficiente de anisotropia, R de Lankford. Alem disso para avaliar a anisotropia também foram realizados ensaio de embutimento Erichsen para determinação das curvas limite de conformação (CLC) e análise da textura cristalográfica através do uso de funções de distribuição de orientação e figuras de polo. Os resultados demostraram que o material da liga 3003 tiveram os melhores resultados comparados com a liga 8079. Na média o limite de escoamento da liga 3003 apresentou tensão 214MPa e limite de ruptura 227Mpa, e a liga 8079 apresentou limite de escoamento 173MPa e limite de ruptura de 180MPa, estes valores foram obtidos no sentido de laminação do material. O índice de anisotropia normal (R) no material 3003 apresentou média de 0,309 e no material 8079, o valor em média foi de 0.622. Nas curvas de limite de conformação (CLC), a liga 3003 apresentou melhores profundidade de conformação.A análise de textura cristalográfica através de figuras de Polo mostrou que as ligas apresentaram resultados similares de textura tipo latão e cobre. Este estudo mostra que é factíveis utilizar a espessura de 55 microns na liga 3003 com redução de 15% em peso comparando com a liga 8079 de espessura de 65 microns para produzir aletas dos radiadores.Nowadays the automotive market, which is increasingly competitive, lighter components that enhance vehicle performance are highly desirable. This study investigated the possibility of reducing the weight of radiators by replacing alloy 8079 with alloy 3003. Currently, primary coils for fin manufacturing are obtained through the twin roll casting (TRC) process. This method converts liquid aluminum directly into solid coils in a single step. After this process, the material remains very thick and lacks surface finishing control. Coils made of alloys 8079 and 3003 produced via this process represent an attractive material for radiator fin applications. The focus of this study is to analyze the mechanical properties and texture of alloys 8079 and 3003 treated with temper (H19) and subjected to identical steps in the fin stamping process used in water radiators made from expanded aluminum. Additionally, it evaluates the more suitable alloy for this application. The chemical composition was determined through atomic absorption spectroscopy, and the microstructure was analyzed using optical microscopy. Mechanical tests assessed ultimate tensile strength, yield strength, and elongation in samples prepared at 0°, 45°, and 90° angles relative to the lamination direction, which were used to evaluate the anisotropy coefficient, R-value (Lankford parameter). Moreover, Erichsen cupping tests were conducted to determine the forming limit curves (FLC), and crystallographic texture was analyzed using orientation distribution functions (ODF) and pole figures to further assess anisotropy. The results demonstrated that alloy 3003 exhibited superior performance compared to alloy 8079. On average, the yield strength of alloy 3003 was 214 MPa, and its ultimate tensile strength was 227 MPa, while alloy 8079 showed a yield strength of 173 MPa and an ultimate tensile strength of 180 MPa. These values were obtained in the rolling direction of the material. The average normal anisotropy index (R) for alloy 3003 was 0.309, whereas alloy 8079 averaged 0.622. In the forming limit curves (FLC), alloy 3003 exhibited better forming depth. The crystallographic texture analysis using pole figures indicated that both alloys presented similar brass- and copper-type textures. This study demonstrates the feasibility of using a thickness of 55 microns for alloy 3003, achieving a 15% weight reduction compared to alloy 8079 with a thickness of 65 microns for radiator fin production
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