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Articles 3841 - 3870 of 34920
Full-Text Articles in Entire DC Network
Vireo-Tno @ Trecvid 2014: Multimedia Event Detection And Recounting (Med And Mer), Chong-Wah Ngo, Yi-Jie Lu, Hao Zhang, Ting Yao, Chun-Chet Tan, Lei Pang, Maaike De Boer, John Schavemaker, Klamer Schutte, Wessel Kraaij
Vireo-Tno @ Trecvid 2014: Multimedia Event Detection And Recounting (Med And Mer), Chong-Wah Ngo, Yi-Jie Lu, Hao Zhang, Ting Yao, Chun-Chet Tan, Lei Pang, Maaike De Boer, John Schavemaker, Klamer Schutte, Wessel Kraaij
Research Collection School Of Computing and Information Systems
This paper presents an overview and comparative analysis of our systems designed for TRECVID 2014 [1] multimedia event detection (MED) and recounting (MER) tasks, including all sub-tasks for Pre-Specified (PS) event detection, all sub-tasks except 100Ex for Ad-Hoc (AH) event detection, and 010Ex sub-task for both PS and AH event recounting. Multimedia Event Detection (MED) : Our main focus for the MED task is on the study of a new zero-example system, which aims to solve the 000Ex and SQ problems. The system can run either fully automatically or semi-automatically. Specifically, we test the automatic run in 000Ex submission and …
Perspectives On Task Ownership In Mobile Operating System Development [Invited Talk], Subhajit Datta
Perspectives On Task Ownership In Mobile Operating System Development [Invited Talk], Subhajit Datta
Research Collection School Of Computing and Information Systems
There can be little contention about Stroustrup's epigrammatic remark: our civilization runs on software. However a caveat is increasingly due, much of the software that runs our civilization, runs on mobile devices today. Mobile operating systems have come to play a preeminent role in the ubiquity and utility of such devices. The development ecosystem of Android - one of the most popular mobile operating systems - presents an interesting context for studying whether and how collaboration dynamics in mobile development differ from conventional software development. In this paper, we examine factors that influence task ownership in Android development. Our results …
Developer Involvement Considered Harmful? An Empirical Examination Of Android Bug Resolution Times, Subhajit Datta, Proshanta Sarkar, Subhashis Majumder
Developer Involvement Considered Harmful? An Empirical Examination Of Android Bug Resolution Times, Subhajit Datta, Proshanta Sarkar, Subhashis Majumder
Research Collection School Of Computing and Information Systems
In large scale software development ecosystems, there is a common perception that higher developer involvement leads to faster resolution of bugs. This is based on conjectures around more ``eyeballs" making bugs "shallow" -- whose validity and applicability are not without dispute. In this paper, we posit that the level of developer attention as well as its extent of diversity influence how quickly bugs get resolved. We report results from a study of 1,000+ Android bugs. We find statistically significant evidence that attention and diversity have contrasting relationships with the resolution time of bugs, even after controlling for factors such as …
Linguistic Analysis Of Toxic Behavior In An Online Video Game, Haewoon Kwak, Telefonica
Linguistic Analysis Of Toxic Behavior In An Online Video Game, Haewoon Kwak, Telefonica
Research Collection School Of Computing and Information Systems
In this paper we explore the linguistic components of toxic behavior by using crowdsourced data from over 590 thousand cases of accused toxic players in a popular match-based competition game, League of Legends. We perform a series of linguistic analyses to gain a deeper understanding of the role communication plays in the expression of toxic behavior. We characterize linguistic behavior of toxic players and compare it with that of typical players in an online competition game. We also find empirical support describing how a player transitions from typical to toxic behavior. Our findings can be helpful to automatically detect and …
An Ecological Model For Digital Platforms Maintenance And Evolution, Paolo Rocchi, Paolo Spagnoletti, Subhajit Datta
An Ecological Model For Digital Platforms Maintenance And Evolution, Paolo Rocchi, Paolo Spagnoletti, Subhajit Datta
Research Collection School Of Computing and Information Systems
The maintenance of software products has been studied extensively in both software engineering and management information systems. Such studies are mainly focused on the activities that take place prior to starting the maintenance phase. Their contribution is either related to the improvement of software quality or to validating contingency models for reducing maintenance efforts. The continuous maintenance philosophy suggests to shift the attention within the maintenance phase for better coping with the evolutionary trajectories of digital platforms. In this paper, we examine the maintenance process of a digital platform from the perspective of the software vendor. Based on our empirical …
A First Look At Global News Coverage Of Disasters By Using The Gdelt Dataset, Haewoon Kwak, Jisun. An
A First Look At Global News Coverage Of Disasters By Using The Gdelt Dataset, Haewoon Kwak, Jisun. An
Research Collection School Of Computing and Information Systems
In this work, we reveal the structure of global news coverage of disasters and its determinants by using a large-scale news coverage dataset collected by the GDELT (Global Data on Events, Location, and Tone) project that monitors news media in over 100 languages from the whole world. Significant variables in our hierarchical (mixed-effect) regression model, such as population, political stability, damage, and more, are well aligned with a series of previous research. However, we find strong regionalism in news geography, highlighting the necessity of comprehensive datasets for the study of global news coverage.
Stopwatch: A Cloud Architecture For Timing Channel Mitigation, Peng Li, Debin Gao, Michael K Reiter
Stopwatch: A Cloud Architecture For Timing Channel Mitigation, Peng Li, Debin Gao, Michael K Reiter
Research Collection School Of Computing and Information Systems
This article presents StopWatch, a system that defends against timing-based side-channel attacks that arise from coresidency of victims and attackers in infrastructure-as-a-service clouds. StopWatch triplicates each cloud-resident guest virtual machine (VM) and places replicas so that the three replicas of a guest VM are coresident with nonoverlapping sets of (replicas of) other VMs. StopWatch uses the timing of I/O events at a VM’s replicas collectively to determine the timings observed by each one or by an external observer, so that observable timing behaviors are similarly likely in the absence of any other individual, coresident VMs. We detail the design and …
Player Acceptance Of Human Computation Games: An Aesthetic Perspective, Xiaohui Wang, Dion Hoe Lian Goh, Ee Peng Lim, Adrian Wei Liang Vu
Player Acceptance Of Human Computation Games: An Aesthetic Perspective, Xiaohui Wang, Dion Hoe Lian Goh, Ee Peng Lim, Adrian Wei Liang Vu
Research Collection School Of Computing and Information Systems
Human computation games (HCGs) are applications that use games to harness human intelligence to perform computations that cannot be effectively done by software systems alone. Despite their increasing popularity, insufficient research has been conducted to examine the predictors of player acceptance for HCGs. In particular, prior work underlined the important role of game enjoyment in predicting acceptance of entertainment technology without specifying its driving factors. This study views game enjoyment through a taxonomy of aesthetic experiences and examines the effect of aesthetic experience, usability and information quality on player acceptance of HCGs. Results showed that aesthetic experience and usability were …
On Joint Modeling Of Topical Communities And Personal Interest In Microblogs, Tuan-Anh Hoang, Ee Peng Lim
On Joint Modeling Of Topical Communities And Personal Interest In Microblogs, Tuan-Anh Hoang, Ee Peng Lim
Research Collection School Of Computing and Information Systems
In this paper, we propose the Topical Communities and Personal Interest (TCPI) model for simultaneously modeling topics, topical communities, and users’ topical interests in microblogging data. TCPI considers different topical communities while differentiating users’ personal topical interests from those of topical communities, and learning the dependence of each user on the affiliated communities to generate content. This makes TCPI different from existing models that either do not consider the existence of multiple topical communities, or do not differentiate between personal and community’s topical interests. Our experiments on two Twitter datasets show that TCPI can effectively mine the representative topics for …
Online Passive Aggressive Active Learning And Its Applications, Jing Lu, Peilin Zhao, Steven C. H. Hoi
Online Passive Aggressive Active Learning And Its Applications, Jing Lu, Peilin Zhao, Steven C. H. Hoi
Research Collection School Of Computing and Information Systems
We investigate online active learning techniques for classification tasks in data stream mining applications. Unlike traditional learning approaches (either batch or online learning) that often require to request the class label of each incoming instance, online active learning queries only a subset of informative incoming instances to update the classification model, which aims to maximize classification performance using minimal human labeling effort during the entire online stream data mining task. In this paper, we present a new family of algorithms for online active learning called Passive-Aggressive Active (PAA) learning algorithms by adapting the popular Passive-Aggressive algorithms in an online active …
Vector Abstraction And Concretization For Scalable Detection Of Refactorings, Narcisa Andreea Milea, Lingxiao Jiang, Siau-Cheng Khoo
Vector Abstraction And Concretization For Scalable Detection Of Refactorings, Narcisa Andreea Milea, Lingxiao Jiang, Siau-Cheng Khoo
Research Collection School Of Computing and Information Systems
Automated techniques have been proposed to either identify refactoring opportunities (i.e., code fragments that can be but have not yet been restructured in a program), or reconstruct historical refactorings (i.e., code restructuring operations that have happened between different versions of a program). In this paper, we propose a new technique that can detect both refactoring opportunities and historical refactorings in large code bases. The key of our technique is the design of vector abstraction and concretization operations that can encode code changes induced by certain refactorings as characteristic vectors. Thus, the problem of identifying refactorings can be reduced to the …
Managing Seller Heterogeneity In A Competitive Marketplace, R. Wu, Mei Lin
Managing Seller Heterogeneity In A Competitive Marketplace, R. Wu, Mei Lin
Research Collection School Of Computing and Information Systems
The growth of online marketplaces is accompanied by significant heterogeneity of the third-party sellers. The marketplace owner often applies policies that favor the sellers who offer higher values to buyers, which puts the lower-value sellers at an even greater disadvantage. This leads to the phenomenon of Matthew Effect. Our study focuses on a marketplace owner’s policy in managing seller heterogeneity and analyzes Matthew Effect in a competitive market environment. By extending the circular city model, we analytically examine the price competition among a large number of sellers that differ both in variety and in their value offerings. We present the …
Deep Learning For Content-Based Image Retrieval: A Comprehensive Study, Ji Wan, Dayong Wang, Steven C. H. Hoi, Pengcheng Wu, Jianke Zhu, Yongdong Zhang, Jintao Li
Deep Learning For Content-Based Image Retrieval: A Comprehensive Study, Ji Wan, Dayong Wang, Steven C. H. Hoi, Pengcheng Wu, Jianke Zhu, Yongdong Zhang, Jintao Li
Research Collection School Of Computing and Information Systems
Learning effective feature representations and similarity measures are crucial to the retrieval performance of a content-based image retrieval (CBIR) system. Despite extensive research efforts for decades, it remains one of the most challenging open problems that considerably hinders the successes of real-world CBIR systems. The key challenge has been attributed to the well-known "semantic gap" issue that exists between low-level image pixels captured by machines and high-level semantic concepts perceived by human. Among various techniques, machine learning has been actively investigated as a possible direction to bridge the semantic gap in the long term. Inspired by recent successes of deep …
Historical Traffic-Tolerant Paths In Road Networks, Pui Hang Li, Man Lung Yiu, Kyriakos Mouratidis
Historical Traffic-Tolerant Paths In Road Networks, Pui Hang Li, Man Lung Yiu, Kyriakos Mouratidis
Research Collection School Of Computing and Information Systems
Historical traffic information is valuable for transportation analysis and planning, as well as for route search services. In view of these applications, we propose the k traffic-tolerant paths problem (TTP) on road networks, which takes a source-destination pair and historical traffic information as input, and returns k paths that minimize the aggregate (historical) travel time. Unlike the shortest path problem, the TTP problem has a combinatorial search space that renders the optimal solution expensive to compute. We propose an exact algorithm and a heuristic algorithm for this problem. Experiments on real traffic data demonstrate the effectiveness of TTP paths and …
Dynamic Clustering Of Contextual Multi-Armed Bandits, Trong T. Nguyen, Hady W. Lauw
Dynamic Clustering Of Contextual Multi-Armed Bandits, Trong T. Nguyen, Hady W. Lauw
Research Collection School Of Computing and Information Systems
With the prevalence of the Web and social media, users increasingly express their preferences online. In learning these preferences, recommender systems need to balance the trade-off between exploitation, by providing users with more of the "same", and exploration, by providing users with something "new" so as to expand the systems' knowledge. Multi-armed bandit (MAB) is a framework to balance this trade-off. Most of the previous work in MAB either models a single bandit for the whole population, or one bandit for each user. We propose an algorithm to divide the population of users into multiple clusters, and to customize the …
Generative Modeling Of Entity Comparisons In Text, Maksim Tkachenko, Hady W. Lauw
Generative Modeling Of Entity Comparisons In Text, Maksim Tkachenko, Hady W. Lauw
Research Collection School Of Computing and Information Systems
Users frequently rely on online reviews for decision making. In addition to allowing users to evaluate the quality of individual products, reviews also support comparison shopping. One key user activity is to compare two (or more) products based on a specific aspect. However, making a comparison across two different reviews, written by different authors, is not always equitable due to the different standards and preferences of individual authors. Therefore, we focus instead on comparative sentences, whereby two products are compared directly by a review author within a single sentence. We study the problem of comparative relation mining. Given a set …
Predicting Effectiveness Of Ir-Based Bug Localization Techniques, Tien-Duy B. Le, Ferdian Thung, David Lo
Predicting Effectiveness Of Ir-Based Bug Localization Techniques, Tien-Duy B. Le, Ferdian Thung, David Lo
Research Collection School Of Computing and Information Systems
Recently, many information retrieval (IR) based bug localization approaches have been proposed in the literature. These approaches use information retrieval techniques to process a textual bug report and a collection of source code files to find buggy files. They output a ranked list of files sorted by their likelihood to contain the bug. Recent approaches can achieve reasonable accuracy, however, even a state-of-the-art bug localization tool outputs many ranked lists where buggy files appear very low in the lists. This potentially causes developers to distrust bug localization tools. Parnin and Orso recently conduct a user study and highlight that developers …
Tonsing's "The Quakers In South Africa: A Social Witness" - Review, Gerard Guiton
Tonsing's "The Quakers In South Africa: A Social Witness" - Review, Gerard Guiton
Quaker Studies
No abstract provided.
'Some Account Of The Progress Of The Truth As It Is In Jesus': The White Quakers Of Ireland, James Gregory
'Some Account Of The Progress Of The Truth As It Is In Jesus': The White Quakers Of Ireland, James Gregory
Quaker Studies
The White Quakers were a small but vocal sect of schismatic Quakers in Dublin, Waterford, Clonmel and Mountmellick, under the leadership of Joshua Jacob and Abigail Beale, between c. 1840-1854. The history of the sect, its connections with contemporary utopian leaders in England, its contemporary reputation in the Quaker and non-Quaker world, and treatment in historiography are examined. White Quaker ideas on religious authority, gender and marriage, capitalist and commercial activity, are also outlined in the following study.
The 'Desert' Society In Languedoc (1686-1704) As Popular Culture And The Roots Of French Quakerism, Jeanne H. Louis
The 'Desert' Society In Languedoc (1686-1704) As Popular Culture And The Roots Of French Quakerism, Jeanne H. Louis
Quaker Studies
The 'Desert' society in Cevennes, Languedoc, was an offshoot of the persecution of French Protestants by Louis XIV. The clandestine assemblies that met in the ravines gave rise to lay ministry, as the Revocation of the Edict of Nantes (1685) had forced professional ministers to flee abroad. At first, Predicants replaced ministers, then Prophets and Prophetesses in turn replaced the killed Predicants. The 'Desert' society gave birth to a popular culture. At the end of the seventeenth century, the Protestants' resistance was peaceful, but as persecutions grew, the Camisard war broke out in 1702. But a minority of Prophets refused …
In Search Of A New Jerusalem: A Preliminary Investigation Into The Causes And Impact Of Welsh Quaker Emigration To Pennsylvania, C.1660 - 1750, Richard C. Allen
In Search Of A New Jerusalem: A Preliminary Investigation Into The Causes And Impact Of Welsh Quaker Emigration To Pennsylvania, C.1660 - 1750, Richard C. Allen
Quaker Studies
The establishment of the North American Association for the Study of Welsh Culture and History (NAASW CH) in the mid 1990s has informed the work of historians on both sides of the Atlantic, and yet the important early history of Welsh emigration to America and reverse migration has still to be fully addressed. Research on Welsh migratory patterns and the impact of America on Wales in the late-eighteenth and nineteenth centuries, notably by Gwyn Alf Williams, Barry Levy, and Bill Jones, has made an important contribution to our understanding of the experiences of Welsh-Americans. However, further research is needed if …
'Ministering Confusion': Rebellious Quaker Women (1650-1660)', Catie Gill
'Ministering Confusion': Rebellious Quaker Women (1650-1660)', Catie Gill
Quaker Studies
This paper assesses the position of women within the Quaker community, concentrating on their ministerial roles. Female prophets and preachers were visible during the first decade of Quakerism, and the early years prove fruitful for exploration of women's experiences. In order to consider the difficulties women faced when taking a public role in support of Quakerism, some context on seventeenth-century attitudes to women will be provided. It will be argued that women had to challenge patriarchal notions that the 'weaker' sex should be silent, passive and obedient. In contrast to prevailing seventeenth-century norms, the potential radicalism of the Quaker approach …
Seventeenth Century Published Quaker Verse, Rosemary Moore
Seventeenth Century Published Quaker Verse, Rosemary Moore
Quaker Studies
Early Quakers disapproved of most aspects of popular culture, and before 1661 they published very little verse. During the 1660s some thirty Quaker authors published verse, addressed both to Quakers and to the public. The impetus behind this surge of verse publication was probably the appearance during 1660 and 1661 of a number of papers by John Perrot, a Quaker preacher who had been arrested in Italy and imprisoned by the Inquisition . His writings, which were brought to England, included a considerable amount of poetry. Perrot was released in 1661 and returned to England, feted by many Quakers as …
Auburn Sun, Tiffany Scales
Auburn Sun, Tiffany Scales
Sketches: the Online Creative Arts Journal of Tennessee State University
No abstract provided.
She Slapped Me, Fawaz Alotaibi
She Slapped Me, Fawaz Alotaibi
Sketches: the Online Creative Arts Journal of Tennessee State University
No abstract provided.
Smells Like Teen Spirit, Tony Joshua
Smells Like Teen Spirit, Tony Joshua
Sketches: the Online Creative Arts Journal of Tennessee State University
No abstract provided.
The Poet, Asalean Springfield
The Poet, Asalean Springfield
Sketches: the Online Creative Arts Journal of Tennessee State University
No abstract provided.
The Final Harvest, Rick D. Hallbeck
The Final Harvest, Rick D. Hallbeck
Sketches: the Online Creative Arts Journal of Tennessee State University
No abstract provided.
Maiden Mantle, Rick D. Hallbeck
Maiden Mantle, Rick D. Hallbeck
Sketches: the Online Creative Arts Journal of Tennessee State University
No abstract provided.
My Black Community, Ashley Stewart
My Black Community, Ashley Stewart
Sketches: the Online Creative Arts Journal of Tennessee State University
No abstract provided.