1,720,976 research outputs found
Storage and processing systems for power-law graphs
Full text linkLarge graphs abound around us - online social networks, Web graphs, the Internet, citation networks, protein interaction networks, telephone call graphs, peer-to-peer overlay networks, electric power grid networks, etc. Many real- life graphs are power-law graphs. A fundamental challenge in today’s Big Data world is storage and processing of these large-scale power-law graphs.
In this thesis, we show that graph processing can be made faster and graph storage can be made more efficient by using techniques that leverage the structure of the underlying power-law graphs. To this end, we present two systems. First, we present LFGraph, which is a fast, distributed, in- memory graph analytics platform. LFGraph leverages the structure and characteristics of power-law graphs in order to reduce communication overhead, and to balance communication and computation load. This makes analytics faster on power-law graphs. Next, we present Bondhu, which is a disk layout manager for graph databases. Bondhu exploits the fact that most real-life power-law graphs are also small-world and these exhibit strong com- munity structure. Bondhu utilizes this community structure in order to make layout decisions. This improves the query response time of graph databases. Our systems are evaluated on real clusters using real-world graphs.Item withdrawn by Mark Zulauf ([email protected]) on 2013-09-04T22:01:07Z
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University of Illinois Theses & Dissertations (ID: 1)
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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
Sustainable buyer-supplier relationship through Quality Control in Supplier’s Factory:A Comparative Case Study in Bangladeshi Garment Industry
No full textAlthough extant literature addresses tensions in buyer-supplier relationship, limited attention has been paid to understand how quality control practices can reduce tensions and maintain a sustainable buyer-supplier relationship. Drawing on this gap, this paper aims to investigate how buyer’s intervention in supplier firms improves product quality performance. Using a root-cause analysis tool, this paper explores how buyer’s quality control initiative influences product quality performance that leads to economic and social sustainability in supplier firms. Following a qualitative research approach, data has been collected from one Danish buyer and four garment suppliers in Bangladesh. Out of four suppliers, two factories are controlled where the buyer firm has intervened the quality control practice while the other two factories are out of intervention initiative. The findings from the two groups are compared and developed propositions. This paper presents a new understanding of how quality control practices contribute to ensure relationship between buyer and supplier, while enhancing economic returns for supplier firm by reducing defects and saving time, and increasing incentive for workers through production target achievement. Thus, quality control intervention eventually leads to supplier firms social and economic sustainability. This study contributes to new insights on the strategies of quality control and sustainability for buyer and supplier in ready-made garments
Supplier’s Capabilities and Performance Improvement in Buyer-Supplier Relationships:A Study of the Garment Industry of Bangladesh
No full textImranul Hoque is an Associate Professor in the Department of Marketing at Jagannath University in Dhaka, Bangladesh. He holds a master’s degree in Innovation & Entrepreneurship from Aalborg University, Denmark. Prior to that, he completed his MBA and BBA with a major in marketing from the University of Dhaka, Bangladesh. He has been teaching marketing for more than twelve years at both the undergraduate and graduate levels. His main research focus is international business, the global value chain, operations management, and sustainability. His research has appeared in the Management Review Quarterly, International Journal of Productivity and Performance Management, South Asian Journal of Management, and more. He has experience working on various national and international projects. In his leisure time, Imranul enjoys playing cricket, listening to music, and travelling
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
Social Network-Aware Disk Management
No full textDisk access patterns of social networking applications are different from those of traditional applications. However, today's disk layout techniques are not adapted to social networking workloads and thus suffer in performance. In this paper, we first present disk layout techniques that leverage community structure in the social graph to make placement decisions. Second, we build a layout manager called the Bondhu system that incorporates our techniques. We integrate Bondhu into the popular Neo4j graph database engine. Our trace driven experimental results show that the Bondhu system improves the median response time by as much as 48%. While taking the community structure into account yields clear benefits, our results indicate that models with more complexity beyond the social graph may yield low additional benefit.is peer reviewedSubmitted by Imranul Hoque ([email protected]) on 2010-12-03T23:45:00Z
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Previous issue date: 2010-12-03unpublishe
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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