1,720,975 research outputs found
Integration of Neutrino Telescope and Night Sky Background Measurement
No full text在天文物理中，微中子因為其和宇宙間的物質交互作用很不容易發生，所以能提供很多宇宙間的訊息。例如，我們可以藉由偵測微中子而對超高能宇宙射線或是早期宇宙演化得到更深入的了解。這兩者都是相當有名的議題。
NuTel設計為觀察τ微中子所激起air showers所產生的Cherenkov 光的望遠鏡。我們感興趣的部份是10^15~10^18 ev (電子伏特) 之間的能量範圍。望遠鏡的尺寸是約二公尺。採用的是Earth-Skimming 法，而倘若Cherenkov光可以由山後被偵測到，νμ → ντ震盪就可以被證實。台大梅峰農場是我們國內的第一個觀測點。首次的野外實測在2009年夏天完成。
首次的野外測試測量夜間天空背景量。我們使用四個多陽極光電管對準山和夜空來證明系統運作。光通亮可以因此被估算出來。In astrophysics, neutrinos provide important information from cosmos due to its interaction among matters along its passage in the universe can hardly occur. We can know more about the origins of UHECR and the early cosmos evolution via neutrino detectors.
NuTel is a telescope designed to observe the Cherenkov light from air showers aroused by τ neutrinos. We are interested in the energy range between 1015~1018ev since this energy range is not covered by the conventional neutrino detectors or UHECR detectors. The size of NuTel is about 2 meter in diameter. Earth-skimming Method is used and if the Chrenkov light can be detected from behind a mountain, the oscillation of νμ → ντ can be proved. Mei-Fong farm of National Taiwan University is our first domestic site. The first field test took place in the summer of 2009.
We measured the night sky background in this field test. We used four MAPMTs and choose moonless nights to determine the incident photon flux behind the mountain
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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