1,725,588 research outputs found
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
Improving software reliability using exception analysis of object oriented programs
No full textMore applications are designed as server programs, many of which are expected to run 24x7. Ensuring the quality of error handling code is vital to the high availability that are expected from them. However, error handling code is hard to explore, review and test, for the reason that 1) it is scattered all over the system, often not at all organized; 2) it is impossible to trigger during runtime by simply manipulating the program inputs or configurations.
The goal of our research is to provide tools that helps programmers explore, review and test error handling code in a structured way to boost the system availability and maintainability.
The contributions of this thesis are the following:
* Definition of the problem of white box robustness testing for Java-based server applications, including an exception *def-catch*
coverage metric and testing framework.
* A new program analysis that enables the above mentioned testing methodology, which allows compiler-generated instrumentation to guide the fault injection and to record the recovery code exercised. (An injected fault is experienced as a Java exception.) The analysis
(i) identifies the *exception-flow `def-uses'* to be tested in this manner, (ii) determines the kind of fault to be requested at a program point, and (iii) finds appropriate locations for code instrumentation.
* Empirical studies of several variants of the analysis algorithms, which demonstrate increased precision in obtaining good test coverage on a set of server benchmarks. These studies include aggregate accuracy and timing information, with discussions of cases in which
static analysis is difficult.
* A program understanding tool that visualizes discovered *exception-flow `def-use'* links.
* A novel program analysis that discovers semantic relations between the *exception-flow `def-uses'* links and combines them into chains, in order to reveal the propagation path of an exception from its original to its final handler.
* An initial case study of testing exception propagation chains.Ph.D.Includes bibliographical references (p. 109-114)
Evaluation of Patient Knowledge and Self-Care Skills in Non-Insulin Dependent Diabetes Mellitus
No full textAppropriate 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
集水區地文因子與土石流發生相關性之研究-以陳有蘭溪為例
Full text linkAccording to the experience of Japan, after the heavy Kuan-Tong earthquake happend, the debris flow occurred over 40 years. Therefore, a high occurrence probability of the debris flow may last about several dozen years in future, since the 921 heavy Taiwan earthquake happend in 1999.
In this study, we used digital elevation model(DEM) and satellite images as the material to analyze the geomorphologic characteristic, with geographic information system (GIS ) software ArcView and the statistic software SPSS of the Watersheds of Chen-Yu-Lan Stream. The occurrence probability of debris flow is relevant to the geomorphologic characteristic. Therefore, after principal components analysis method was used to analyze and investigate 20 geomorphologic factors, only 12 of them are the primary factors.
The principal components of high debris flow potential creek were up to 85.7% with comparing to those creeks which debris flow didn't occur by discrimination analysis. Moreover, high debris flow potential creeks those SWCB have investigated by the model was varified to be high correlative with their geomorphologic characteristic. And it produces a difference function as the reference for determining the debris flows occurrence potential. The result of this research can be refered for preventing debris flow, determining the potential class of debris flows occurrence and making decision of watersheds management.依據日本之經驗，在關東大地震後，其土石流之發生共持續了40年之久。因此，台灣自1999年發生九二一大地震後，在未來數十年內持續發生土石流之機率將相當高。
本研究以陳有蘭溪集水區為試區，應用地理資訊系統(GIS)之技術，以三維數值高程模型及衛星影像為素材，並以SPSS統計軟體進行分析，探討「集水區的地文特性與土石流發生機率之關係」。由於集水區之地文特性為土石流發生之潛因，故以多變量統計中之主成份分析法將20個地文參數進行分析並萃取其中之12個主要影響因子。
並以試區中之土石流發生高潛勢溪流與未發生之溪流之主成份參數進行區別分析，有效性高達85.7%，且建立一區別函數可供土石流發生潛勢判定之參考。另外，將水保局公佈之潛勢溪流代入函數中加以驗證，得到高度之相關性。本研究之成果將可為土石流防治、發生潛勢判定及為集水區整治優先次序決策之參考。中文摘要…………………………………………………………… I
Abstract…………………………………………………………… II
目錄………………………………………………………………… III
表目錄……………………………………………………………… IV
圖目錄……………………………………………………………… V
壹、 緒論…………………………………………………… 1
1-1. 研究動機……………………………………………… 1
1-2. 研究目的…………………………………………………1
貳、 前人研究……………………………………………… 5
2-1. 土石流(Debris Flow)………………………………… 5
2-2. 數值地形模型(DTM)…………………………………… 6
2-3. 地理資訊系統(GIS)……………………………………10
2-4. 集水區資訊系統……………………………………… 12
2-5. 多變量統計分析(Multivariate Analysis)……… 12
参、 研究材料與方法……………………………………… 15
3-1. 試區材料簡介與研究設備…………………………… 15
3-2. 研究流程與方法……………………………………… 33
肆、 結果分析與討論……………………………………… 55
4-1. 主成份分析…………………………………………… 55
4-2. 區別分析……………………………………………… 63
伍、 結論與建議…………………………………………… 68
5-1. 結論…………………………………………………… 68
5-2. 建議…………………………………………………… 69
參考文獻………………………………………………………… 7
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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