1,724,122 research outputs found
Mechanical Properties of High Performance Cementitious Grout Masterflow 9300
No full textThe present report describes tests carried out on the high performance grout MASTERFLOW 9300, developed by BASF Construction Chemicals A/S.The present report describes tests carried out on the high performance grout MASTERFLOW 9300, developed by BASF Construction Chemicals A/S
On the rotation periods of the components of the triple system TYC 9300-0891-1AB/TYC 9300-0529-1 in the Octans Association
Full text linkStellar rotation depends on different parameters such as age, mass, initial chemical composition, initial angular momentum, and environment characteristics. The range of values of these parameters causes the dispersion in the rotation period distributions observed in young stellar clusters/associations. We focus our investigation on the effects of different circumstellar environments on stellar rotation. More specifically, we consider the effects of a perturber stellar companion on the accretion-disc lifetime at early evolution stages. We are searching in stellar Associations for visual triple systems where all stellar parameters are similar, with the only exceptions of the unknown initial rotation period, and of the circum-stellar environment, in the sense that one of the two about equal-mass components has a close-by third 'perturber' component. In the present study we analyze the 35-Myr old visual triple system TYC 9300-0891-1AB + TYC 9300-0529-1 in the young Octans stellar association consisting of three equal-mass K0V components. We collected from the literature all information that allowed us to infer that the three components are actually physically bound forming a triple system and are members of the Octans Association. We collected broad-band photometric timeseries in two observation seasons. We discovered that all the components are variable, magnetically active, and from periodogram analysis we found the unresolved components TYC 9300-0891-1AB to have a rotation period P = 1.383 d and TYC9300-0529-1 a rotation period P = 1.634 d. TYC 9300-0891-1A, TYC 9300-0891-1B, and TYC 9300-0529-1 have same masses, ages, and initial chemical compositions. The relatively small 16% rotation period difference measured by us indicates that all components had similar initial rotation periods and disc lifetimes, and the separation of 157 AU between the component A and the 'perturber' component B (or vice-versa) has been sufficiently large to prevent any significant perturbation/shortening of the accretion-disc lifetime. <ce:bib-referenc
Linked collectors and determiners for: Institute of Dendrology PAS, Flora of Sudety Mountains.
No full textNatural history specimen data linked to collectors and determiners held within, "Institute of Dendrology PAS, Flora of Sudety Mountains". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/f7c496b0-9300-11da-8596-b8a03c50a862">https://bionomia.net/dataset/f7c496b0-9300-11da-8596-b8a03c50a862</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/f7c496b0-9300-11da-8596-b8a03c50a862">https://gbif.org/dataset/f7c496b0-9300-11da-8596-b8a03c50a862</a>. Formatted as a Frictionless Data package
Dealing with Internal Inconsistency in Double-Bounded Dichotomous Choice: An Application to Community-Based Health Insurance
Full text linkContingent valuation method is commonly used in the field of health economics in an attempt to help policy maker in taking decisions. The use of the double-bounded dichotomous choice format results in a substantial gain in statistical efficiency over the single bounded dichotomous choice format. Yet, this efficiency gain comes at the cost of biasness known as internal inconsistency. This paper aims at reducing this internal inconsistency in double-bounded dichotomous choice by using the certainty calibration technique in a community-based health insurance study. Findings confirm the internal inconsistency between the initial and the follow-up responses and the statistical efficiency gains of the double-bounded dichotomous choice over the single-bounded dichotomous choice. Furthermore, the use of certainty calibration reduces this internal inconsistent pattern in responses and still maintains efficiency gain. We further discuss the policy implications.Contingent valuation; internal inconsistency; certainty calibration; community-based health insurance
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Predicting space climate change
Full text linkThe recent decline in the open magnetic flux of the Sun heralds the end of the Grand Solar Maximum (GSM) that has persisted throughout the space age, during which the largest‐fluence Solar Energetic Particle (SEP) events have been rare and Galactic Cosmic Ray (GCR) fluxes have been relatively low. In the absence of a predictive model of the solar dynamo, we here make analogue forecasts by studying past variations of solar activity in order to evaluate how long‐term change in space climate may influence the hazardous energetic particle environment of the Earth in the future. We predict the probable future variations in GCR flux, near‐Earth interplanetary magnetic field (IMF), sunspot number, and the probability of large SEP events, all deduced from cosmogenic isotope abundance changes following 24 GSMs in a 9300‐year record
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
Caracterización de la bomba solar SHURflo 9300
No full text"El 28% de la población en Colombia actualmente no tiene agua potable en sus viviendas. Según el director del Ideam; en Colombia, el 74% de recursos hídricos se encuentran en aguas subterráneas. El grupo norteamericano PENTAIR, desarrollo un tipo de bomba sumergible que se alimenta mediante paneles solares. Por esto, el propósito de este proyecto estaba enfocado a caracterizar la bomba solar SHURflo 9300 creada por este grupo, así como, detallar los pasos de instalación de la bomba y posibles recomendaciones para un mejor desempeño y uso. La bomba es de desplazamiento positivo con 3 diafragmas que es alimentada por un motor DC de 24V." -- Tomado del Formato de Documento de Grado."Currently 28% of the population in Colombia does not have potable water in their homes. According to the Ideam's director; In Colombia, 74% of water resources are found in groundwater. The North American group PENTAIR, developed a type of submersible pump that is fed by solar panels. For this reason, the purpose of this project was to characterize the SHURflo 9300 solar pump created by this group, as well as to detail the installation steps of the pump and possible recommendations for better performance and use. The pump is a positive displacement type with 3 diaphragms which is powered by a 24V DC motor." -- Tomado del Formato de Documento de Grado.Ingeniero MecánicoPregrad
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
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