1,723,476 research outputs found
Trykk 8850
Full text link8850 med tittel: Internasjonal tariff for befordring av ekspressgods, takster og særskilte befordringsbestemmelser ; Internasjonal ekspressgodstariff, takster og bestemmelse
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Afterpulse time-spectrum measurement of RCA 8850 photomultiplier
Full text linkThe photomultiplier dark pulse-height, signal induced pulse-height, and afterpulse time spectra have been measured on three RCA 8850 52 mm-diameter photomultipliers. The first dynode of this photomultiplier has a cesium activated, gallium-phosphide secondary emitting surface. Measurement techniques and the measuring systems are described in detail
Análise dos efeitos decorrentes de tormentas TS em estruturas reticuladas
Full text linkTCC (graduação) - Universidade Federal de Santa Catarina. Centro Tecnológico. Engenharia Civil.Este trabalho foi elaborado com o objetivo de propor o modelo mais adequado de perfil de velocidades de ventos para obtenção de forças oriundas de linhas de tormenta TS ou ThunderStorm em uma estrutura reticulada além de uma comparação com o modelo atual de norma ABNT NBR 6123:1988 – Forças devidas ao vento em edificações. Tormentas TS são fenômenos atmosféricos causados por nuvens do tipo cúmulo-nimbo ou no latim cumulonimbus, que causam fortes jatos verticais descendentes de vento localizados e em contato com o solo se deslocam para todas as direções e com velocidades variadas. O dimensionamento de estruturas reticuladas, em relação aos efeitos do vento segue a norma ABNT NBR 6123:1988 – Forças devidas ao vento em edificações, porém o tratamento de uma Tormenta TS requer uma análise mais sofisticada, pois uma Tormenta TS possui características singulares que a diferem de outros eventos de ventos. Será desenvolvido neste trabalho um estudo comparativo entre um modelo probabilístico que descreve uma tormenta TS e o modelo da NBR 6123:1988 em uma estrutura reticulada e uma análise dos possíveis perfis de velocidade de uma tormenta TS. A estrutura será submetida a dois diferentes carregamentos, de acordo com os modelos descritos anteriormente. Os resultados dos dois carregamentos são apresentados e discutidos além da análise dos possíveis perfis de velocidades apresentados
Porosity, Powder X-Ray Diffraction Patterns, Skeletal Density, and Thermal Stability of NIST Zeolitic Reference Materials RM 8850, RM 8851, and RM 8852
No full textThis paper reports the powder X-ray diffraction patterns, argon isotherms at 87 K, Brunauer–Emmett–Teller surface areas, pore size distributions, pore volumes, skeletal densities, and thermal gravimetric analyses for three National Institute of Standards and Technology zeolitic reference materials, RM 8850 (zeolite Y), RM 8851 (zeolite A), and RM 8852 (ZSM-5
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
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
Binary adsorption equilibria of three CO2+CH4 mixtures on NIST reference zeolite Y (RM 8850) at temperatures from 298 to 353 K and pressures up to 3 MPa
No full textAdsorption equilibria of CO2, CH4, and their mixtures were measured on binderless pellets of NIST reference zeolite NaY (RM 8850) using a static gravimetric setup. The unary adsorption isotherms are reported at temperatures from 298 to 393 K up to a pressure of 3 MPa and compare favorably with independent results on RM 8850 powder. The competitive adsorption measurements were performed at temperatures from 298 to 353 K and up to 3 MPa for three premixed gas mixtures with CO2 molar feed compositions of 0.25, 0.50, and 0.75. The results constitute the first competitive adsorption dataset reported for any of the NIST reference materials. RM 8850 shows a strong selectivity for CO2 adsorption toward CH4. The experimental unary and binary adsorption isotherms are accurately modeled using the simplified statistical isotherm model (SSI). Notably, the agreement with the model improves only slightly (and within experimental uncertainties) when the whole dataset is used for parameter fitting as opposed to only using the unary data
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
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