28,050 research outputs found
Role of Ranking Algorithms for Information Retrieval
As the use of web is increasing more day by day, the web users get easily
lost in the web's rich hyper structure. The main aim of the owner of the
website is to give the relevant information according their needs to the users.
We explained the Web mining is used to categorize users and pages by analyzing
user's behavior, the content of pages and then describe Web Structure mining.
This paper includes different Page Ranking algorithms and compares those
algorithms used for Information Retrieval. Different Page Rank based algorithms
like Page Rank (PR), WPR (Weighted Page Rank), HITS (Hyperlink Induced Topic
Selection), Distance Rank and EigenRumor algorithms are discussed and compared.
Simulation Interface has been designed for PageRank algorithm and Weighted
PageRank algorithm but PageRank is the only ranking algorithm on which Google
search engine works.Comment: Keywords: Page Rank, Web Mining, Web Structured Mining, Web Content
Minin
Spectral centrality measures in complex networks
Complex networks are characterized by heterogeneous distributions of the
degree of nodes, which produce a large diversification of the roles of the
nodes within the network. Several centrality measures have been introduced to
rank nodes based on their topological importance within a graph. Here we review
and compare centrality measures based on spectral properties of graph matrices.
We shall focus on PageRank, eigenvector centrality and the hub/authority scores
of HITS. We derive simple relations between the measures and the (in)degree of
the nodes, in some limits. We also compare the rankings obtained with different
centrality measures.Comment: 11 pages, 10 figures, 5 tables. Final version published in Physical
Review
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Structured Collaboration Across a Transformative Knowledge Network-Learning Across Disciplines, Cultures and Contexts?
Realising the Sustainable Development Goals (SDGs) will require transformative changes at micro, meso and macro levels and across diverse geographies. Collaborative, transdisciplinary research has a role to play in documenting, understanding and contributing to such transformations. Previous work has investigated the role of this research in Europe and North America, however the dynamics of transdisciplinary research on ‘transformations to sustainability’ in other parts of the world are less well-understood. This paper reports on an international project that involved transdisciplinary research in six different hubs across the globe and was strategically designed to enable mutual learning and exchange. It draws on surveys, reports and research outputs to analyse the processes of transdisciplinary collaboration for sustainability that took place between 2015-2019. The paper illustrates how the project was structured in order to enable learning across disciplines, cultures and contexts, and describes how it also provided for the negotiation of epistemological frameworks and different normative commitments between members across the network. To this end, it discusses lessons regarding the use of theoretical and methodological anchors, multi-loop learning and evaluating emergent change (including the difficulties encountered). It offers insights for the design and implementation of future international transdisciplinary collaborations that address locally-specific sustainability challenges within the universal framework of the 2030 Agenda for Sustainable Development
Mapping Twitter Topic Networks: From Polarized Crowds to Community Clusters
Conversations on Twitter create networks with identifiable contours as people reply to and mention one another in their tweets. These conversational structures differ, depending on the subject and the people driving the conversation. Six structures are regularly observed: divided, unified, fragmented, clustered, and inward and outward hub and spoke structures. These are created as individuals choose whom to reply to or mention in their Twitter messages and the structures tell a story about the nature of the conversatio
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Engaging Opportunities: Connecting young people with contemporary research and researchers
This is the final report for ‘Engaging Opportunities’, an RCUK-funded School-University Partnership between the Open University and the Denbigh Teaching School Alliance. Informed by action research, this four-year project was designed to create structured, strategic, sustainable and equitable mechanisms for effective school-university engagement with research. The report describes an evidence-based strategy designed to embed school-university engagement with research within the University’s strategic planning for research and the operational practices of researchers. Through the early stages of our partnership we noted a lack of suitable planning tools that work for researchers, teachers and students. We therefore introduced a flexible and adaptable framework of four types of activity—open lectures, open dialogues, open inquiry and open creativity—combined with an upstream approach to planning based on a set of six principles. A sub-set of these activities were evaluated through a combination of surveys, interviews and interventions. In conclusion, we argue that institutional and professional cultures can be resistant to the prospect of fully embedding school-university engagement with research in a structured, strategic and sustainable manner, and offer suggestions for how this context could and should be changed
Temporal similarity metrics for latent network reconstruction: The role of time-lag decay
When investigating the spreading of a piece of information or the diffusion
of an innovation, we often lack information on the underlying propagation
network. Reconstructing the hidden propagation paths based on the observed
diffusion process is a challenging problem which has recently attracted
attention from diverse research fields. To address this reconstruction problem,
based on static similarity metrics commonly used in the link prediction
literature, we introduce new node-node temporal similarity metrics. The new
metrics take as input the time-series of multiple independent spreading
processes, based on the hypothesis that two nodes are more likely to be
connected if they were often infected at similar points in time. This
hypothesis is implemented by introducing a time-lag function which penalizes
distant infection times. We find that the choice of this time-lag strongly
affects the metrics' reconstruction accuracy, depending on the network's
clustering coefficient and we provide an extensive comparative analysis of
static and temporal similarity metrics for network reconstruction. Our findings
shed new light on the notion of similarity between pairs of nodes in complex
networks
The effectiveness of travel blogs on consumers’ travel planning
This research explores the effectiveness of travel blogs on consumers’ travel planning through information search, decision making and visual communication. There is an uncertainty of tourist services information from travel blogs that have affected consumers’ travel planning in addition to the functions of travel blogs are not as prevalent as it is mostly used in the advantage of Destination Marketing Organizations (DMOs). This research proposes two research questions which are travel blogs have the functions that affect consumers’ travel planning and to what degree travel blogs could influence travel planning. This research uses quantitative approach in which questionnaire is used for the instrument and the targeted population is on Education Hub Pagoh. A total of 54 respondents is obtained from the distributed instrument. The results are run through Pearson correlation analysis followed by regression analysis in which this research shows that effectiveness, information search, decision making and visual communication has a positive relationship with each other but not all variables are significant for use. This research shows that the functions of travel blogs as well as the degree of influence are present which reflects on the effectiveness of it
Digital Media & Learning
Highlights findings from MacArthur's digital media and learning initiative about changes in how youth learn, play, socialize, and engage in civic life; in learning environments and institutions; and in the guidance needed from parents and teachers
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