1,721,240 research outputs found
An approach to improving cluster labeling and evaluation
Get PDFUniversity of Minnesota M.S. thesis. February, 2014. Major: Computer science. Advisor: Donald B. Crouch. 1 computer file (PDF); vii, 52 pages.The clustering of a large document collection produces subsets of documents (typically overlapping) such that documents within a given cluster exhibit substantial similarities with each other. In this work, the final phase of the clustering process is to generate labels for each cluster, that is, a set of terms that represent the inherent meaning associated with a cluster. Although several methods exist for generating labels, little work has been done in developing methods that determine the quality of the labels. In other words, do the labels represent terms that a human might associate with a cluster? Do they enable the user to readily distinguish between clusters? Do they provide insight into the inherent meaning of the documents in the cluster? In this thesis, we focus on developing a tool that automatically assesses the quality of document cluster labels. Our objective is for the tool to be flexible, extensible, and reliable. It uses the Hungarian algorithm [16] to calculate the accuracy of the labels.We analyze the performance of our evaluation tool using cluster labels generated by the labeling mechanism of SenseClusters [21], a comprehensive package that generates clusters utilizing unsupervised learning. Label generation is based on the selection of the top five or ten bigrams as ranked by a measure of association. Since selecting features is a significant step in generating labels, we extend the labeling mechanism of SenseClusters by incorporating higher valued n-grams and tf-idf term weighting and then analyze the quality of the labels produced by these additional methods. The experimental results indicate that trigram features produce better results than the traditional unigram or bigram features of SenseClusters. Also, using tf- idf improves the quality of terms in the labels over those produced by the similarity mechanism of the SenseClusters.Jha, Anand Mohan. (2014). An approach to improving cluster labeling and evaluation. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/162841
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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Comparisons and Deflections: Indian Nationalists in the Political Economy of Japanese Imperialism, 1931-1938
Get PDFWith the onset of the Great Depression in 1929 and the 1931 Manchurian Incident, Japanese intellectuals and business leaders appealed to the language of self-determination and Pan-Asianism to advocate for domestic reform and imperial expansion. At the same time, Indian nationalists in Japan, such as Rash Behari Bose, Anand Mohan Sahay, Aiyappan-Pillai Madhavan Nair, and others, viewed the creation of Manchukuo in 1932 as evidence of Japanese sincerity toward Asian nationalism, as well as a model of development that India and Asia should follow. These invocations were used to legitimize their own nation-building projects and critique trends within the mainstream Indian nationalist movement. This article analyzes the encounters between Japan, India, and the Indian merchant diaspora in East Asia from 1931 to 1938. The author argues that Japanese Pan-Asianists as well as some Indian nationalists sought to legitimize their own national and transnational projects during this period by appealing to a common Asian civilization that was mediated through a politics of comparison and deflection. The article also demonstrates that comparisons often occluded the issue of imperial violence and revealed the limitations of accepting nationalism and the nation-state as the foundation of civilizational discourse and transnational community. Keywords: Pan-Asianism, Japan, India, Indian diaspora, Manchukuo, politics of comparison, Rash Behari Bose, Anand Mohan Sahay, Aiyappan-Pillai Madhavan Nair, Mahendra Pratap, Ōkawa Shūmei, Nakatani Takeyo, Indian merchants, Kobe, Yokohama, nationalism, imperialism, political economy, comparative colonialis
IIT-H Professor presents paper at 26th Biennial Congress of ISTH
Get PDFHis work was also published in the journal “Mathematical Modelling of Natural Phenomena”. Anand Mohan , who co-authored the work with his student Modepalli Susree, has said “Blood coagulation and fibrinolysis are complex phenomena including hundreds of biochemical interactions, and a few biophysical processes
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
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