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ACM Transactions on the Web (TWEB), Volume 10 Issue 1, February 2016

Analysis and Solution of CSS-Sprite Packing Problem
Jakub Marszałkowski, Jan Mizgajski, Dariusz Mokwa, Maciej Drozdowski
Article No.: 1
DOI: 10.1145/2818377

A CSS-sprite packing problem is considered in this article. CSS-sprite is a technique of combining many pictures of a web page into one image for the purpose of reducing network transfer time. The CSS-sprite packing problem is formulated here as...

Discovering Best Teams for Data Leak-Aware Crowdsourcing in Social Networks
Iheb Ben Amor, Salima Benbernou, Mourad Ouziri, Zaki Malik, Brahim Medjahed
Article No.: 2
DOI: 10.1145/2814573

Crowdsourcing is emerging as a powerful paradigm to help perform a wide range of tedious tasks in various enterprise applications. As such applications become more complex, crowdsourcing systems often require the collaboration of several experts...

Individual Judgments Versus Consensus: Estimating Query-URL Relevance
Hengjie Song, Yonghui Xu, Huaqing Min, Qingyao Wu, Wei Wei, Jianshu Weng, Xiaogang Han, Qiang Yang, Jialiang Shi, Jiaqian Gu, Chunyan Miao, Nishida Toyoaki
Article No.: 3
DOI: 10.1145/2834122

Query-URL relevance, measuring the relevance of each retrieved URL with respect to a given query, is one of the fundamental criteria to evaluate the performance of commercial search engines. The traditional way to collect reliable and accurate...

Detecting Spam and Promoting Campaigns in Twitter
Xianchao Zhang, Zhaoxing Li, Shaoping Zhu, Wenxin Liang
Article No.: 4
DOI: 10.1145/2846102

Twitter has become a target platform for both promoters and spammers to disseminate their messages, which are more harmful than traditional spamming methods, such as email spamming. Recently, large amounts of campaigns that contain lots of spam or...

Flexible Construction of Executable Service Compositions from Reusable Semantic Knowledge
Rik Eshuis, Freddy Lécué, Nikolay Mehandjiev
Article No.: 5
DOI: 10.1145/2842628

Most service composition approaches rely on top-down decomposition of a problem and AI-style planning to assemble service components into a meaningful whole, impeding reuse and flexibility. In this article, we propose an approach that starts from...

W-tree: A Compact External Memory Representation for Webgraphs
Bruno T. Ávila, Rafael D. Lins
Article No.: 6
DOI: 10.1145/2835181

World Wide Web applications need to use, constantly update, and maintain large webgraphs for executing several tasks, such as calculating the web impact factor, finding hubs and authorities, performing link analysis by webometrics tools, and...

A Spatial-Temporal QoS Prediction Approach for Time-aware Web Service Recommendation
Xinyu Wang, Jianke Zhu, Zibin Zheng, Wenjie Song, Yuanhong Shen, Michael R. Lyu
Article No.: 7
DOI: 10.1145/2801164

Due to the popularity of service-oriented architectures for various distributed systems, an increasing number of Web services have been deployed all over the world. Recently, Web service recommendation became a hot research topic, one that aims to...