Social networks and semantic web http://www.citeulike.org/groupfunc/328 CiteULike.org en-gb Copyright © 2004-2007 Oversity Limited http://www.citeulike.org/group/328/article/6488812 Social tagging systems which allow users to create, edit and share collections of internet resources associated with tags in a collaborative fashion are growing in popularity in recent years. The rapidly growing amount of shared data in these folksonomies , i.e., taxonomies created by the folk, presents new technical challenges involved with discovering resources which are likely of interest to the user. Social tags which reflect the meaning of resources from the user's points of view provide an opportunity to enhance the quality of retrieval. In this paper, we introduce a novel framework to search relevant resources to the user query by incorporating information obtained from folksonomies' underlying data structures consisting of a set of user/tag/resource triplets. In contrast to traditional retrieval and recommendation techniques which represent a collection by a matrix, we represent our data as a third-order tensor on which a novel Cube Latent Semantic Indexing (CubeLSI) technique is proposed to capture latent semantic associations between tags. With the latent semantic representation we show how to rank relevant resources according to their relevance to user queries. The excellent performance of the method is demonstrated by an experimental evaluation on the deli.cio.us dataset. 2010-01-05T23:54:44+00:00 http://www.citeulike.org/group/328/article/6488806 We propose an approach for using data from a social tagging application like del.icio.us as a basis for user adaptation. We discuss several algorithms for mining taxonomies of tags from tag spaces. The mined taxonomy can be used to dene adaptation rules that determine how to adapt a system to a user given the user's personal tag space. The contributions of this work are a description of an application scenario for taxonomymining algorithms, a discussion of algorithms by Mika[3], Heymann et al.[2], and Schmitz et al.[4], and the proposal of an extension to the algorithms that takes the contexts of tags into account when building a taxonomy. We look at the performances of the algorithms on a dataset retrieved from del.icio.us and give a tentative recommendation of what algorithm to use. 2010-01-05T23:50:29+00:00 http://www.citeulike.org/group/328/article/6488173 In this work we propose a novel framework for bookmark weighting which allows us to estimate the effectiveness of each of the bookmarks individually. We show that by weighting bookmarks according to their estimated quality we can significantly improve search effectiveness. Using empirical evaluation on real data gathered from two large bookmarking systems, we demonstrate the effectiveness of the new framework for search enhancement. 2010-01-05T21:58:00+00:00 http://www.citeulike.org/profile/junjie 2010-01-05T16:12:42+00:00 http://www.citeulike.org/profile/debubabu 2010-01-05T10:45:05+00:00 http://www.citeulike.org/group/328/article/4011187 The essential complement to the pathbreaking book _Competitive Strategy,_ Michael E. Porter's _Competitive Advantage_ explores the underpinnings of competitive advantage in the individual firm. With over 30 printings in English and translated into thirteen languages, this second volume in Porter's landmark trilogy describes how a firm actually gains an advantage over its rivals. _Competitive Advantage_ introduces a whole new way of understanding what a firm does. Porter's groundbreaking concept of the value chain disaggregates a company into "activities," or the discrete functions or processes that represent the elemental building blocks of competitive advantage. Now an essential part of international business thinking, _Competitive Advantage_ takes strategy from broad vision to an internally consistent configuration of activities. Its powerful framework provides the tools to understand the drivers of cost and a company's relative cost position. Porter's value chain enables managers to isolate the underlying sources of buyer value that will command a premium price, and the reasons why one product or service substitutes for another. He shows how competitive advantage lies not only in activities themselves but in the way activities relate to each other, to supplier activities, and to customer activities. _Competitive Advantage_ also provides for the first time the tools to strategically segment an industry and rigorously assess the competitive logic of diversification. That the phrases "competitive advantage" and "sustainable competitive advantage" have become commonplace is testimony to the power of Porter's ideas. _Competitive Advantage_ has guided countless companies, business school students, and scholars in understanding the roots of competition. Porter's work captures the extraordinary complexity of competition in a way that makes strategy both concrete and actionable. 2010-01-02T02:56:51+00:00 http://www.citeulike.org/group/328/article/1242600 Although scientists typically insist that their research is very exciting and adventurous when they talk to laymen and prospective students, the allure of this enthusiasm is too often lost in the predictable, stilted structure and language of their scientific publications. I present here, a top-10 list of recommendations for how to write consistently boring scientific publications. I then discuss why we should and how we could make these contributions more accessible and exciting. 2009-12-26T03:11:27+00:00