165,236 research outputs found
Reanalysis of Possible effects due to Gold-plating on the Thermal Expansion of Copper on Constant-volume Gas Thermometry at Low Temperatures
No full textConstant-volume gas thermometry below the triple point of water (TPW) with reference to TPW gives temperature values higher than the correct ones when the thermal expansion coefficient of the bulb assumed in the calculation is smaller than the real one. Therefore, in order to attribute this temperature difference to a change in the thermal expansion coefficient of copper due to gold-plating, it is necessary that gold-plating increases the thermal expansion coefficient of copper even though that of gold is smaller than that of copper
Variations on the Author
No full text“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
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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 the Difference of the Triple Point Temperatures of 20Ne and 22Ne using Sealed Cells
No full textAt the National Metrology Institute of Japan (NMIJ), the triple points of
20Ne and 22Ne were realized using modular sealed cells, manufactured by the Istituto Nazionale di Ricerca Metrologica (INRiM) in Italy to measure the difference of the triple-point temperatures of 20Ne and 22Ne. Standard platinum resistance thermometers (SPRTs) were used that were calibrated by NMIJ on the International Temperature Scale of 1990 (ITS-90). In previous reports, sealed cells of 20Ne and 22Ne were mounted one at a time in a cryostat and their triple points were realized in separate cool-downs (the single-cell measurement). In this study, first, the triple point was realized using the single-cell measurement for 20Ne and 22Ne cells. Second, the 20Ne and 22Ne cells were mounted together on the same copper block and their triple points were realized subsequently one after the other in the same cool-down of the cryostat (the double-cell measurement). The melting curves observed by the single-cell and the double-cell measurements were almost identical for each cell. The difference of the triple-point temperatures between the two cells, 22T −20 T , was estimated, not only using the subrange of SPRTs defined in the ITS-90 from 13.8033 K to 273.16 K (subrange 1) but also that defined from 24.5561 K to 273.16 K (subrange 2). The difference in (22T −20T ) between the subranges 1 and 2 is within 0.06 mK, which is caused by the subrange inconsistency in the ITS-90. The standard uncertainty in (22T −20 T ) due to the subrange inconsistency is estimated to be 0.017 mK. After correction for the effects of impurities and other isotopes in the 20Ne and 22Ne cells, the difference in the triple-point temperatures between pure 20Ne and pure 22Ne is estimated to be 0.146 64 (5) K on subrange 1, which is consistent within the uncertainty with the former studies. When 22T −20T for pure 20Ne and pure 22Ne is estimated on subrange 2, 22T −20T becomes 0.146 60 (5), which agrees very well with the former reports of INRiM evaluating 22T −20T on subrange 2
Larry O. Spencer, Conference Author Presentation
No full textGen. Larry O. Spencer, USAF (Ret.), author of Dark Horse: A Journey from the Horseshoe to the Pentago
Supplementary Information for the ITS-90: Chapter 4- Interpolating Constant-Volume Gas Thermometry - Edition 2012
No full textA description is given on how to construct a working interpolating constant-volume gas thermometry according to the present state-of-the-art
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Catalytic Combustion-Type Methane Gas Sensor with Tungsten-doped Apatite-type Gadolinium Silicate
No full textThis is a pre-copyedited, author-produced version of an article accepted for publication in Chemistry Letters following peer review. The version of record Wonjoon Lee, Shinji Tamura, Nobuhito Imanaka, Catalytic combustion-type methane gas sensor with tungsten-doped apatite-type gadolinium silicate, Chemistry Letters, Volume 54, Issue 10, October 2025, upaf177, is available online at: https://doi.org/10.1093/chemle/upaf177.We report a thermally engineered apatite-type Gd₁₀Si₆−xWxO₂₇+δ-supported PdO/γ-Al₂O₃ catalyst for catalytic combustion-type CH₄ sensor. Incorporation of W⁶⁺ induces local lattice distortion via strong W–O bonds, reducing catalyst-specific heat capacity and enabling rapid internal heat transfer. This accelerates sensor response speed and sensitivity at lower operating temperatures. Optimized PdO/Gd₁₀Si₅.₇W₀.₃O₂₇+δ/γ-Al₂O₃ catalyst exhibited more than twice the sensor output and a significantly shorter response time than the undoped system, demonstrating lattice-level thermal control via strategic chemical substitution improves sensor performance
Análise de misturas solo-agregado reciclados de resíduos sólidos da construção civil, para fins de pavimentação de vias urbanas de baixo volume de tráfego
No full textThis work deals with the continuation of Scientific Initiation research initiated by Tamura (2012), which draws up a mixture of soil and recycled aggregate analysis for paving of low traffic volume roads using local materials from the Vale do Paraíba region. The main steps of the process were the soil and recycled aggregate characterization, along with grading tests and California Bearing Ratio (CBR) applied to the soil, the recycled aggregate and the mixture of soil and recycled aggregate; aiming their use as base and sub-base in paving urban roads. The results are discussed, emphasizing the mechanical behavior. The current results are compared with the results of IC Tamura research, taking decisions over this job to the final product best result. For a greater understanding of the work in general were described paving, its structure, its components and its physical behavior. It has been intended to emphasize the importance of the mixture of soil and recycled aggregate to meet the quality requirements and compliance with the specifications of current technical standards, in the context of durability, natural materials economy, decreases volume in landfills and cost reductionNeste trabalho aborda-se a continuação da pesquisa de Iniciação Científica iniciada por Tamura (2012), onde se elabora uma análise de mistura solo-agregado RCD (Resíduos Sólidos da Construção e Demolição de Obras Civis) para pavimentação de estradas de baixo volume de tráfego utilizando-se de materiais locais da região do Vale do Paraíba. As principais etapas do processo foram a caracterização do solo e do agregado reciclado, os ensaios de granulometria e de Índice de Suporte Califórnia (CBR) aplicados no solo, no agregado reciclado e na mistura solo-agregado reciclado; visando o seu uso como base e sub-base na pavimentação de vias urbanas. Discute-se seus resultados, dando ênfase no seu comportamento mecânico. Compara-se os resultados atuais com os resultados da pesquisa de IC de Tamura (2012), tomando-se decisões ao longo deste trabalho para o melhor resultado do produto final. Para um maior entendimento do trabalho em geral foram descritas a pavimentação, sua estrutura, seus componentes e seu comportamento físico. Tem-se como objetivo ressaltar a importância da mistura solo-agregado reciclado visando atender as exigências de qualidade e o atendimento às especificações das normas técnicas vigentes, num contexto de durabilidade, economia de materiais naturais, diminuição do volume em aterros sanitários e redução de cust
Análise de misturas solo-agregado reciclados de resíduos sólidos da construção civil, para fins de pavimentação de vias urbanas de baixo volume de tráfego
No full textThis work deals with the continuation of Scientific Initiation research initiated by Tamura (2012), which draws up a mixture of soil and recycled aggregate analysis for paving of low traffic volume roads using local materials from the Vale do Paraíba region. The main steps of the process were the soil and recycled aggregate characterization, along with grading tests and California Bearing Ratio (CBR) applied to the soil, the recycled aggregate and the mixture of soil and recycled aggregate; aiming their use as base and sub-base in paving urban roads. The results are discussed, emphasizing the mechanical behavior. The current results are compared with the results of IC Tamura research, taking decisions over this job to the final product best result. For a greater understanding of the work in general were described paving, its structure, its components and its physical behavior. It has been intended to emphasize the importance of the mixture of soil and recycled aggregate to meet the quality requirements and compliance with the specifications of current technical standards, in the context of durability, natural materials economy, decreases volume in landfills and cost reductionNeste trabalho aborda-se a continuação da pesquisa de Iniciação Científica iniciada por Tamura (2012), onde se elabora uma análise de mistura solo-agregado RCD (Resíduos Sólidos da Construção e Demolição de Obras Civis) para pavimentação de estradas de baixo volume de tráfego utilizando-se de materiais locais da região do Vale do Paraíba. As principais etapas do processo foram a caracterização do solo e do agregado reciclado, os ensaios de granulometria e de Índice de Suporte Califórnia (CBR) aplicados no solo, no agregado reciclado e na mistura solo-agregado reciclado; visando o seu uso como base e sub-base na pavimentação de vias urbanas. Discute-se seus resultados, dando ênfase no seu comportamento mecânico. Compara-se os resultados atuais com os resultados da pesquisa de IC de Tamura (2012), tomando-se decisões ao longo deste trabalho para o melhor resultado do produto final. Para um maior entendimento do trabalho em geral foram descritas a pavimentação, sua estrutura, seus componentes e seu comportamento físico. Tem-se como objetivo ressaltar a importância da mistura solo-agregado reciclado visando atender as exigências de qualidade e o atendimento às especificações das normas técnicas vigentes, num contexto de durabilidade, economia de materiais naturais, diminuição do volume em aterros sanitários e redução de cust
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