Hwai-Jung Hsu

Feng Chia University

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Feng-Jian Wang

National Yang Ming Chiao Tung University

Kuan-Ta Chen

Institute of Information Science, Academia Sinica

Cheng-Hsin Hsu

National Tsing Hua University

Jing-Kai Lou

Carestream (United States)

Feng-jian Wang

National Yang Ming Chiao Tung University

Chin‐Laung Lei

National Taiwan University

Shang-Yu Wu

National Tsing Hua University

Chun‐Ying Huang

National Yang Ming Chiao Tung University

Deyu Chen

Affiliated Hospital of Jiangsu University

Winfred Huang

Cooperative Institutions

National Yang Ming Chiao Tung University

National Taiwan University

Academia Sinica

Feng Chia University

Institute of Information Science, Academia Sinica

National Tsing Hua University

University of California, Irvine

Tamkang University

Chunghwa Telecom (Taiwan)

Institute of Statistical Science, Academia Sinica

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Forecasting online game addictiveness

Network and System Support for Games (2012)

Jing-Kai Lou Kuan-Ta Chen Hwai-Jung Hsu Chin‐Laung Lei

Online gaming has now become an extremely competitive business. As there are so many game titles released every month, gamers have become more difficult to please and fickle in their allegiances. Therefore, it would be beneficial if we could forecast how addictive a game is before publishing it on the market. With the capability of game addictiveness forecasting, developers will be able to continuously adjust the game design and publishers will be able to assess the potential market value of a game in its early development stages. In this paper, we propose to forecast a game's addictiveness based on players' emotional responses when they are first exploring the game. Based on the account activity traces of 11 commercial games, we develop a forecasting model that predicts a game's addictiveness index according to electromyographic measures of players' two facial muscles. We hope that with our methodology, the game industry could optimize the odds of successful investments and target more accurately the provision of a better entertaining experience.

Video game

Odds

10.5555/2501560.2501568

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Citations (4)

GamingAnywhere

ACM Transactions on Multimedia Computing Communications and Applications (2014)

Chun‐Ying Huang Kuan-Ta Chen Deyu Chen Hwai-Jung Hsu Cheng-Hsin Hsu

We present the first open source cloud gaming system, called GamingAnywhere. In addition to its openness, we have designed, GamingAnywhere for high extensibility, portability, and reconfigurability. We implemented it on Windows, Linux, OS X, and Android. We conducted extensive experiments to evaluate its performance. Our experimental results indicate that GamingAnywhere is efficient, scalable, adaptable to network conditions, and achieves high responsiveness and streaming quality. GamingAnywhere can be employed by researchers, game developers, service providers, and end users for setting up cloud gaming testbeds, which we believe, will stimulate more research into innovations for cloud gaming systems and applications.

Software portability

Cloud service provider

Extensibility

10.1145/2537855

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Citations (138)

A Methodology to Developing Situation-Aware Pervasive Applications with Service Oriented Architecture

Hwai-Jung Hsu Shang-Yu Wu Feng-Jian Wang

Pervasive applications, like smart living, geriatrics care, agricultural development, etc, are rapidly developed recently. Situation-awareness and workflow-centric are important characteristics of the applications. Service-oriented architecture which provides flexibility in integrating heterogeneous devices and communication networks might improve the execution of pervasive applications. To integrate these techniques, we present an application model composed of a situation model, workflows, and required services for development of pervasive applications. A service-based framework supporting situation-awareness and workflow management is sketched to support execution of pervasive applications. This paper also presents the framework and its pervasive applications development. Finally, a case study is used for demonstration.

Context-aware pervasive systems

10.1109/services.2010.84

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Citations (6)

Approximating strike zone size and shape for baseball umpires under different conditions

International Journal of Performance Analysis in Sport (2020)

Jyh-How Huang Hwai-Jung Hsu

A nonswung pitch is called either a strike or a ball depending on its location over the home plate. According to the baseball regulation, strike zone is rectangular in shape; however, the shape of strike zone is actually decided by umpires. In this paper, based on the locations of 5,297 nonswung pitches collected by Trackman radar in 2018, we verified the shape and size of the strike zone of individual umpires under various conditions such as different ball counts and batter handedness, etc. Two approaches were adopted to approximate the strike zone for the individual umpires. First, local polynomial regression was used to estimate the probability of pitches being called strikes at different locations under various circumstances. The contours of 0.5 and 0.75 probabilities were drawn to illustrate the strike zone. The area of the contour regions was then calculated for comparison. Second, we used decision tree algorithm to analyse strike judgement criteria among the umpires. With the approximated strike zone, the quality of each umpire’s strike judgement can be evaluated. Our results demonstrate that the changing shape of the strike zone is common in baseball games and pitchers, catchers, and batters, etc., may leverage this knowledge to their advantage.

Judgement

Ball (mathematics)

10.1080/24748668.2020.1726156

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Citations (9)

DroneFace

Hwai-Jung Hsu Kuan-Ta Chen

In this paper, we present DroneFace, an open dataset for testing how well face recognition can work on drones. Because of the high mobility, drones, i.e. unmanned aerial vehicles (UAVs), are appropriate for surveillance, daily patrol or seeking lost people on the streets, and thus need the capability of tracking human targets' faces from the air. Under this context, drones' distances and heights from the targets influence the accuracy of face recognition. In order to test whether a face recognition technique is suitable for drones, we establish DroneFace composed of facial images taken from various combinations of distances and heights for evaluating how a face recognition technique works in recognizing designated faces from the air. Since Face recognition is one of the most successful application in image analysis and understanding, and there exist many face recognition database for various purposes. To the best of our knowledge, DroneFace is the only dataset including facial images taken from controlled distances and heights within unconstrained environment, and can be valuable for future study of integrating face recognition techniques onto drones.

Drone

Three-dimensional face recognition

10.1145/3083187.3083214

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Citations (37)

Using Artifact Flow Diagrams to Model Artifact Usage Anomalies

Hwai-Jung Hsu Feng-Jian Wang

Workflow is a set of tasks which are systematized to achieve certain business goal(s), where the tasks run in a particular order under automatic control. Artifacts, collections of data items, are necessary for task (process) executions in a workflow. However, an execution may yield unexpected results due to improper artifact manipulation: e.g., activities miss artifact or artifact conflict occur at an activity dynamically. Therefore, the analyses on artifact usage in design phase are very important for quality insurance. This paper presents a model of artifact flow diagrams to state the artifact usage anomalies in processes transmitting artifacts based on DCDC, distinct control and data channel, model. There are four types of artifact usage anomalies identified in DCDC and the formal statement of each anomaly is described correspondingly for future study of anomaly search.

Artifact (error)

Control flow

10.1109/compsac.2009.145

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Citations (8)

Detecting Artifact Anomalies in Temporal Structured Workflow as Reusable Assets

Hwai-Jung Hsu Feng-Jian Wang

In service-oriented architecture (SOA), workflows coordinate the services and artifacts to provide solution of certain business goals, and can be viewed as reusable assets in design level. A well-structured workflow may still fail or produce unanticipated run-time behavior because of abnormal artifact manipulation generated from twisted temporal and structural relationships between activities. The methodologies for eliminating such artifact anomalies caused by structural factors have been studied in several previous works, however, the temporal factors are still seldom addressed in related analyses. In this paper, TSworkflow, structured workflows with temporal consideration, are considered as reusable assets in SOA, and the issues of detecting artifact anomalies in TSworkflow are discussed. The artifact anomalies generated from the twisted temporal and structural relationships between artifact operations in TSworkflow are described. The obstacles in the detection such as loops and blank branches are discussed. Finally, we sketch an algorithm detecting artifact anomalies in TSworkflow to assure the correctness of the corresponding reusable assets in SOA.

Artifact (error)

Sketch

10.1109/compsacw.2011.67

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Citations (10)

Delegation Pattern in Workflow System

Hwai-Jung Hsu Feng-Jian Wang

The best practices in workflow techniques might be constructed as workflow patterns. Van der Aalst and Russel categorized and discussed workflow patterns about several perspectives such as control flow, data, resources and exception handling. Delegation behavior is an important issue in modern workflow system. Although Russel described "resource delegation pattern" in his work, more patterns about delegation need be studied. In this paper, we present eleven basic and seven advanced delegation patterns extracted from current delegation mechanisms in RBAC and workflow systems. All the patterns are clarified with examples; on the other hand, the issues along with the patterns such as restrictions, the delegation operation adopted, etc. are also discussed.

Delegation

10.1109/compsacw.2010.75

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Citations (1)

An incremental analysis for resource conflicts to workflow specifications

Journal of Systems and Software (2008)

Hwai-Jung Hsu Feng-jian Wang

10.1016/j.jss.2007.12.799

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Citations (17)

A Methodology to Developing Context-Aware Pervasive Applications

Hwai-Jung Hsu Shang-Yu Wu Feng-Jian Wang

Pervasive applications, like smart living, geriatrics care, agricultural development, etc, are rapidly developed recently. Context-awareness and workflow-centric are important characteristics of the applications. Service-oriented architecture which provides flexibility in integrating heterogeneous devices and communication networks might improve the execution of pervasive applications. To integrate these techniques, we present an application model composed of a layered context model, a workflow, and required services extracted from pervasive applications. A service-based framework supporting context-awareness and workflow management is sketched to support execution of pervasive applications. We also present a development process for pervasive applications based on the application model and the framework.

Context-aware pervasive systems

Context awareness

Context management

10.1109/sose.2010.63

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Citations (3)