1,721,956 research outputs found
Mechanical thermal noise in coupled oscillators
No full textA correct prediction of the thermal noise spectrum is crucial to design properly gravitational wave detectors which are intrinsically limited by this kind of fluctuation. The off-resonance slope of the spectrum can be predicted using the fluctuation-dissipation theorem and it must be consistent and compatible with the spectrum obtained through the normal mode representation. We investigate this comparison leading to a deeper understanding of the thermal noise prediction tools
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
Chaos and geodynamics: mélanges, mélange-forming processes and their significance in the geological record. Preface to Special Issue
No full textMélanges occur extensively in accretionary and collisional orogenic belts around the world, and represent disrupted and chaotic units including sedimentary, magmatic and metamorphic rocks (commonly as exotic blocks) mixed by stratal disruption and tectonic, diapiric and/or sedimentary processes Although numerous papers and books have been published on mélanges, the definition and the geological significance of mélanges are still a matter of debate and controversy. The mechanisms that are responsible for the formation of mélanges may occur in a range of geological environments from the shallowest geosphere to significant crustal depths, associated with subduction zone tectonics, en-mass sedimentary processes, slope tectonics, in situ fluidization and mud diapirism, strike-slip tectonics, or due to the interplay of some of these processes. Although mélanges may characterize diverse geodynamic environments of formation, they are commonly associated with subduction of oceanic lithosphere, collisional events (arc-continent and continentcontinent), and intra-continental deformation including rifting and passive margin evolution. Hence, mélanges are cogenetic with emplacement of ophiolites, advancement of thrust and nappe sheets, evolution of foreland basins, formation of submarine landslides (olistostromes) and seismic events. Mélange formation is also involved in the mechanical stability of accretionary and orogenic wedges, and in the redistribution of earth materials through the processes of offscraping, underplating, mass-transport movements, subduction channel flow, and mud diapirism. Therefore, mélanges and mélange-forming processes are intimately linked with tectonics and tectonically induced geological processes in crustal evolution, and they constitute a significant component of the Earth history. Hence, further systematic and process-oriented, inter-disciplinary studies of mélanges should provide much-needed information about orogenic processes and crustal growth. Furthermore, the results of these mélange studies should also bemost insightful for the recognition of these chaotic rock bodies in the Precambrian greenstone belts. This Special Issue is a result of series of scientific sessions on mélanges that we convened at the GSA Global Meeting, Tectonic Crossroads, held in Ankara, Turkey in October 2010, the European Geosciences Union General Assembly in Vienna, Austria in May 2010, and the American Geophysical Union Fall Meeting in San Francisco, California, in December 2011. The papers in this Special Issue present the most up-to-date observations and interpretations on various mélange types and mélange forming processes from around the world. The geographic locations of the mélanges covered in this Special Issue are shown in Fig. 1. This Special Issue makes a significant contribution to the mélange concept, streamlines the definitions and classifications ofmélanges and broken formations, and provides a rich archive of well-documented mélange occurrences from diverse geological environments
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
Chaos and geodynamics: Melanges, melange-forming processes and their significance in the geological record
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