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ACM Transactions on the Web (TWEB), Volume 12 Issue 3, July 2018

Evaluating Quality in Use of Corporate Web Sites: An Empirical Investigation
Daniela Fogli, Giovanni Guida
Article No.: 15
DOI: 10.1145/3184646

In our prior work, we presented a novel approach to the evaluation of quality in use of corporate web sites based on an original quality model (QM-U) and a related methodology (EQ-EVAL). This article focuses on two research questions. The first...

Localness of Location-based Knowledge Sharing: A Study of Naver KiN “Here”
Sangkeun Park, Mark S. Ackerman, Uichin Lee
Article No.: 16
DOI: 10.1145/2983645

In location-based social Q8A services, people ask a question with a high expectation that local residents who have local knowledge will answer the question. However, little is known about the locality of user activities in location-based...

Extracting and Summarizing Situational Information from the Twitter Social Media during Disasters
Koustav Rudra, Niloy Ganguly, Pawan Goyal, Saptarshi Ghosh
Article No.: 17
DOI: 10.1145/3178541

Microblogging sites like Twitter have become important sources of real-time information during disaster events. A large amount of valuable situational information is posted in these sites during disasters; however, the information is...

Completeness Management for RDF Data Sources
Fariz Darari, Werner Nutt, Giuseppe Pirrò, Simon Razniewski
Article No.: 18
DOI: 10.1145/3196248

The Semantic Web is commonly interpreted under the open-world assumption, meaning that information available (e.g., in a data source) captures only a subset of the reality. Therefore, there is no certainty about whether the available information...

Optimizing Whole-Page Presentation for Web Search
Yue Wang, Dawei Yin, Luo Jie, Pengyuan Wang, Makoto Yamada, Yi Chang, Qiaozhu Mei
Article No.: 19
DOI: 10.1145/3204461

Modern search engines aggregate results from different verticals: webpages, news, images, video, shopping, knowledge cards, local maps, and so on. Unlike “ten blue links,” these search results are heterogeneous in nature and...

Faster Base64 Encoding and Decoding Using AVX2 Instructions
Wojciech Muła, Daniel Lemire
Article No.: 20
DOI: 10.1145/3132709

Web developers use base64 formats to include images, fonts, sounds, and other resources directly inside HTML, JavaScript, JSON, and XML files. We estimate that billions of base64 messages are decoded every day. We are motivated to improve the...