1,723,617 research outputs found
Retardation of reflective cracking using additive 5990.
No full textResearch was conducted in 1980 using Additive 5990 to preventreflective cracking in asphalt cement concrete when placed overportland cement concrete. Test sections were placed with 08, 3%,68, and 9% Additive 5990 by weight of asphalt cement at mix temperaturesbetween 375OF and 415\ub0F with AC-5 and AC-10 grade asphaltcement. Also, sections using AC-5 and AC-10 were constructed withthe normal mix temperature (not to exceed 330\ub0F). One section wasplaced using AC-20 mixed at the normal mix temperature.It was concluded that the Additive 5990 did not prevent reflectivecracking on this project
Retardation of Reflective Cracking using Additive 5990; HR-222, February, 1987
Get PDFResearch was conducted in 1980 using Additive 5990 to prevent
reflective cracking in asphalt cement concrete when placed over
portland cement concrete. Test sections were placed with 08, 3%,
6 8 , and 9% Additive 5990 by weight of asphalt cement at mix temperatures
between 375OF and 415°F with AC-5 and AC-10 grade asphalt
cement. Also, sections using AC-5 and AC-10 were constructed with
the normal mix temperature (not to exceed 330°F). One section was
placed using AC-20 mixed at the normal mix temperature.
It was concluded that the Additive 5990 did not prevent reflective
cracking on this project
Rb-Sr And Sm-Nd Ages, and Petrogenesis of Depleted Shergottite Northwest Africa 5990
Get PDFNorthwest Africa (NWA) 5990 is a very fresh Martian meteorite recently found on Hamada du Draa, Morocco and was classified as an olivine-bearing diabasic igneous rock related to depleted shergottites [1]. The study of [1] also showed that NWA 5990 resembles QUE 94201 in chemical, textural and isotopic aspects, except QUE 94201 contains no olivine. The depleted shergottites are characterized by REE patterns that are highly depleted in LREE, older Sm-Nd ages of 327-575 Ma and highly LREE-depleted sources with Nd= +35~+48 [2-7]. Age-dating these samples by Sm-Nd and Rb-Sr methods is very challenging because they have been strongly shocked and contain very low abundances of light rare earth elements (Sm and Nd), Rb and Sr. In addition, terrestrial contaminants which are commonly present in desert meteorites will compromise the equilibrium of isotopic systems. Since NWA 5990 is a very fresh meteorite, it probably has not been subject to significant desert weathering and thus is a good sample for isotopic studies. In this report, we present Rb-Sr and Sm-Nd isotopic results for NWA 5990, discuss the correlation of the determined ages with those of other depleted shergottites, especially QUE 94201, and discuss the petrogenesis of depleted shergottites
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
DonArch au catalogue des carnets de recherche Hypothèses - 4 décembre 2023
No full textCréé en 2022 dans le cadre du groupe de travail "Archives et données de l'archéologie" de l'Institut ARKAIA (Aix-Marseille Université), transformé en 2023 pour devenir le carnet de recherche du service d’archives de l’Institut de Recherche sur l’Architecture Antique (IRAA – UAR3155 – CNRS – AMU – UL2 – UPPA), DonArch est au catalogue des carnets de recherche de la plateforme Hypothèses depuis le 4 décembre 2023 et dispose désormais de son ISSN (format électronique) : 3002-5990. DonArch tra..
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