Workshop Program

(DoubleTree by Hilton Hotel | Room: Mt. Hood | Feb. 25, 2017)

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1 09:00~09:15 Welcome Greetings from Workshop Organizers
2 09:15~09:30 Brief Introduction of CSCW in China
3 09:30~10:30 Session I: Techniques, Devices and Systems for Collaboration Session Chair:
Ning Gu
Dietary Information Collection for Patients with Chronic Kidney Disease

Abstract: Diet management is crucial for the treatment of CKD (Chronic Kidney Disease) patients, in which precise collection of the dietary intake information is fundamental. Existing approaches, though might be effective to some extent, do not work well to collect dietary information of Chinese food due to the complexity in both the materials and special ways of cooking. To this end, in this paper, we propose a novel system for collecting the intake of Chinese food for CKD patients. It first establishes a knowledge base for Chinese food based on the open cookbooks of online cooking sites. Then, based on the pre-built knowledge base, a user-friendly interface is developed together with the consideration of the usability. Finally, system demonstration indicates the effectiveness of our system.

Si Chen, Liantao Ma, Jiaqi Wang, Jiaming Zhang, Jiangtao Wang, Wen Tang, Yasha Wang
Peking University, Beijing China
CollaDroid: UI Offloading for Interactive Remote Collaboration of Android Applications

Abstract: Collaborative work supported by mobile applications has become more and more popular. Mobile collaboration in some cases needs to be conducted in an interactive way to allow the sharing of the requester screen with the collaborator. Existing interactive screen sharing techniques, however, may cause heavy network traffic and high latency and lack fine-grained control of the scope of collaboration. In this paper, we propose CollaDroid, a lightweight and UI Description based technique for interactive collaboration of Android applications. CollaDroid can automatically transform an Android application to a collaboration augmented application with which a requester can interactively collaborate with a remote collaborator by synchronizing UI (User Interface) content and events.

Jiahua Zheng1, 2, Xin Peng1, 2, Jiacheng Yang1, 2, Huaqian Cai3, Gang Huang3, Ying Zhang3, Wenyun Zhao1, 2
1Fudan University, Shanghai China
2Shanghai Key Laboratory of Data Science, Fudan University, China
3Peking University, Beijing China
UbiEye: A Ubiquitous Eye Tracking Device

Abstract: Eye tracking from the end of the last century, applied to user experience and interactive research, market research and consumer research, psychology and neuroscience research. However, a major obstacle to the application of eye tracking in the consumer is the eyeball tracking technology that still requires the processing power of the PC. To the best of our knowledge, there is no affordable, eye-catching eye-tracking pervasive computing device. Considering the high demand for wearable eye tracking for high performance, low power, and flexible processors, and the lack of sufficient signal processing capability of existing microprocessors, we intend to adopt a new ARM + FPGA computing architecture, can provide flexible and scalable solutions, which is to achieve embedded computer vision applications an excellent way. At the same time, we intend to introduce small-scale CNN tracking eye-catching position which is favorable to FPGA acceleration, and seek faster and more accurate results than traditional methods by studying the existing data sets.

Yuhu Chang1, 2, Hansu Gu3, Tun Lu1, 2, Ning Gu1, 2
1Fudan University, Shanghai, China
2Shanghai Key Laboratory of Data Science, Fudan University, China
3Seagate Technology, Longmont, Colorado, USA
4 10:30~11:00 Coffee break
5 11:00~12:00 Session II: Comparing, Understanding and Predicting Emerging Collective Behavior Session Chair:
Mark Ackerman
Danmaku: Understanding its Usage in China and its Broader Potential

Abstract: Danmaku, or bullet screen, refers to a video comment function that allows users to comment on a video at specific points in the video timeline. The comments are then synced with the video timeline so that they display directly on the video at the intended point as overlaid comments. Danmaku has gained popularity in Japan and China since it first emerged in 2006. However, it has not yet been widely adopted in Europe or the United States. This research examines the ways in which users interact with and are motivated by the functionality. We suggest potential benefits and challenges of adopting such a system.

Yun Huang, Yaxing Yao, Jennifer Bort, Qunfang Wu
Syracuse University, USA
Differences in Hosting Standards, Service Orientation, and Power Relationships between Couchsurfing and Airbnb

Abstract: Couchsurfing and Airbnb are sharing economy platforms helping users host strangers in their homes. Although both support network hospitality, they differ in an important sense: Couchsurfing prohibits monetary payment while Airbnb is built around it. We conducted interviews with users experienced on both social-based systems like Couchsurfing and money-based systems like Airbnb (“dual-users'') to better understand and unpack systemic differences. Based on these interviews we propose that Airbnb compared to Couchsurfing: (1) has perceptions of minimum quality requirements (2) focuses more on places to stay in, rather than people to stay with (3) gives power to guests instead of hosts.

Maximilian Klein, Haiyi Zhu
University of Minnesota, Twin Cities, Minneapolis USA
Predicting Member Long-Term Productivity from Pre-joining Activities in Online Groups

Abstract: Productive and dedicated members are critical to the success of online groups like Wikiprojects, Facebook groups and Douban groups. We seek to understand how members' pre-joining activities in the groups can predict their long-term productivity in the groups. In an initial study, we examined two types of pre-joining connections: identity-based attachment (how much members' interests were aligned with the group's topics) and bonds-based attachment (how much members had interacted with other members of the subgroup). Analyses of 79,704 editors in 1,341 WikiProjects showed that 1) both identity-based and bonds-based attachment increased editors' post-joining productivity; and 2) identity-based attachment had a stronger effect on boosting direct contributions to articles while bonds-based attachment had a stronger effect on increasing article and project coordination. In future work, we plan to examine the effects of other types of pre-joining activities and early post-joining activities on members’ long-term activities and contributions in both Wikiprojects and other online group contexts.

Bowen Yu, Haiyi Zhu
University of Minnesota, Twin Cities, Minneapolis, USA
6 12:00~12:30 Video Posters (I)
Incorporating Answer Correlation into Result Inference in Crowdsourcing

Abstract: In crowdsourcing, a task is usually assigned to multiple workers for processing. Then the answers are collected and aggregated to obtain the final result of the corresponding task, which is often referred to as result inference. We argue both the correlation within an answer and the correlation among answers are of great importance to improve the effectiveness of result inference. In this paper, we introduce two of our previous studies on leveraging answer correlation to obtain better quality of crowdsourcing results. The first work targets complex tasks (e.g. recognizing a handwritten sentence) where subtask answers (e.g. words) are correlated within the context of a task. The second work concerns the knowledge acquisition tasks where the answers may have conceptual correlation among them. In all, both of the two studies demonstrate the implications to considering answer correlation in result inference in crowdsourcing.

Hailong Sun, Yili Fang, Tao Han, Xudong Liu
Beihang University, Beijing China
Individual Value Learning and Prediction based on Complex Knowledge Network

Abstract: With the growth of multi-discipline research and applications, it is meaningful to recommend cross domain good works or excellent professionals to an academic researcher. There are two challenges: one is the difficulty in computing the cross-domain influence of an academic resource, another is the unknown potential influence of a new publication since it has few citations. To solve the above problems, we introduce the fine-grained and domain dependent academic knowledge base that are also scalable and evolutionary, based on which we propose the indexes on cross domain correlation and quantitative potential influence. Several methods are introduced to compute the indexes, as well as the algorithms are proposed to learn the mapping relationships cross different research domains. Finally, the potential cross-domain value of individuals can be predicted.

Yi Xie, Yuqing Sun
Shandong University, Jinan, China
Cyber Physical Social System on Museum System

Cyber physical social system (CPSS) integers social computing, machine learning, data mining, network and human computer interaction. The CPSS provides a method for complex system such as intelligent transportation system, preventive medical service system, smart grid, and smart cities. It is made up of cyber-physical system (CPS) and cyber social system (CSS). Now, there is a lot of work on how to model CPS with petri net, but it is less work on CSS. In the paper, firstly, we propose a static component architecture of CPSS. Secondly, we use hybrid petri net to describe the behavior of cyber physical system, and a proposed learning Petri net, which connects Petri net with neural network, to model the behavior of cyber social system. Thirdly, we apply the methodology to a museum system to forecast the systematic behavior.

Tengfei Li, Jing Liu
East China Normal University, Shanghai, China
7 12:30~14:00 Lunch break
8 14:00~15:00 Session III: Cross Culture, Global Innovation & Knowledge Sharing Session Chair:
Huatong Sun
Cultural Differences in Participation Intention in The Sharing Economy

Abstract: Sharing economy, which allows people to have access to others’ resources without owning them, has had rapid development throughout the world. However, most of the current research focuses on the practices in western cultures, but the results may not necessarily hold in eastern cultures. In this paper, we discuss the possible differences between Chinese and Americans in their intention to participate in sharing economy. This session will be relevant for attendees interested in understanding and facilitating the sharing economy across the world.

Teng Ye, Lionel P. Robert Jr.
University of Michigan, Ann Arbor, USA
Articulating discursive affordances as value propositions for global innovation

Abstract: This position paper examines two recent cases of global innovations that flow across national borders and sites of cultures, involving Chinese IT professionals and innovators. Drawing on archival research and multi-sited international fieldwork findings, it seeks to answer how the discursive affordances (Sun & Hart-Davidson, 2014) influenced the diffusion of technological innovations globally and co-created value propositions with local stakeholders (London, Pogue, & Spinuzzi, 2015) as they competed for global ascendency. As it unpacks the global flow of the innovation practices, this paper directs our attention to the symbolic construction and cultural circulation of globally distributed work. It discusses how the emerging “dynamic, rhizomatic, and nonhierarchical” structures will inform our new understanding of the CSCW practice in China and beyond.

Huatong Sun
University of Washington Tacoma, Tacoma, USA
Conveying Sense of Force Explicitly: Designing future e-reading systems to support subjective knowledge sharing

Abstract: In the shift from UGC (User-Generated Content) to PGC (Professionally-Generated Content) for online content production, we will see more formal knowledge sharing in the formats of textbooks and user manuals. This asks us to design better technical reading systems to better support social knowledge sharing. In this workshop presentation, I want to discuss our current studies and future work on how to use attached haptic devices to support knowledge sharing in the case of future e-textbooks. Our thought for supporting written or verbal explanations of human sensing of force is as follows. Because written or verbal explanation about sense of force is personal and subjective, when same stimulus is presented to different persons, their explanations about how they feel could be different. Therefore, a practical method is to use a system to pass the same stimulus, so that the receiving people can feel them firsthand and understand the correspondent explanation explicitly.

Chunming Gao
University of Washington Tacoma, Tacoma, USA
9 15:00~15:30 Video Posters (II)
Supporting Real-Time Collaborative Programming-- Previous Work and Open Research Issues

Abstract: Real-time collaborative programming supports programmers to access and edit a shared set of source code at the same time. It is suitable for small-size programming teams working on interdependent tasks and modules, with frequent interactions in short durations. It is an emerging collaboration approach under the research phase, and there exists a variety of open issues that have not been addressed yet. In this paper, we review our previous work in the field of real-time collaborative programming, and present several major research issues that are critical for further improving the usability of this emerging approach and techniques, including (a) supporting continuous compilation and debugging in real-time collaboration process, (b) achieving cross-file semantic conflict prevention, (c) providing conflict prevention and collaboration awareness by intelligent analysis of dependency relationships, and (d) proposing a cloud-based architecture for real-time collaborative programming environments. We plan to address these issues in the near future, and contribute novel approaches, techniques and solutions to the community.

Hongfei Fan1, Chengzheng Sun2
1Tongji University, Shanghai China
2Nanyang Technological University, Singapore Singapore
Consistency Maintenance for the Associated Graph Model in the Mobile Collaborative Environment

Abstract: Mobile real-time collaborative graph editing system is one of the important branches of collaborative interactive applications. In view of the characteristics of signal instability in mobile network environment, the traditional COT control algorithm is improved in this paper. Based on detection and retransmission mechanism of loss operations, the consistent control algorithm in mobile network environment is designed. Apart from three basic graphic operations (create, delete, update), this paper presents move some innovation operations followed by move, relate and relieve. The object-to-object position relationship is mapped to an associated graph model. According to types of concurrent conflict, some reasonable conflict solutions have been designed to maintain consistency of the shared graphic document. And this paper develops a mobile collaborative graphics editing system named by Co-Paint, further verifying the feasibility of the above algorithm.

Xin Zhang, Liping Gao
University of Shanghai for Science and Technology, Shanghai China
Performance Analysis of Heterogeneous Servers in Cloud Centers

Abstract: In this paper, performance is analyzed for complex cloud centers with heterogeneous servers and delay times. Requests arrive at the system with Poisson distribution. Task service times are exponential distribution random variables with different rates corresponding to different physical machines. A Physical Machine Controller model along with its infinitesimal generator matrix are developed, according to which performance metrics (such as the rejection probability, the expected job number in the queue) of requests are obtained. Experimental results demonstrate that the constructed model is effective for the considered setting.

Shuang Wang, Xiaoping Li
Southeast University, Nanjing China
Variable structure Petri Nets

Abstract: Currently mobile computing systems have attracted a lot of concerns. Many studies have been done to model and analyze these systems. However, the modeling and analysis capacity of these studies are still weak and inadequate. This paper introduces a new Petri net model called Variable Structure Petri net (VSPN) for the mobile computing system. VSPN has dynamic structure which can represent the dynamicity and uncertainty of interaction in systems. A comparison for the VSPN and other Petri net models is given. This paper gives a new model with powerful modeling capacity for mobile computing systems.

Zhijun Ding, Ru Yang, Changjun Jiang
Tongji University, Shanghai China
10 15:30~16:00 Coffee break
11 16:00~16:40 Session IV: Caring for the Vulnerable Session Chair:
Tun LU
Ageing with the Help of AT-- Learning from a Study of Seniors Using AT in China

Abstract: Assistive Technologies (ATs) address seniors’ important health and caring need for the ageing world. Despite the increasing development and use of ATs, the usability issues remain challenge the process of senior using ATs. In order to better understand these challenges, we conducted a qualitative study of 23 AT users and stakeholders, who have adopted and incorporate assistive technologies into their daily lives. We contribute to knowledge about how ATs works in aging and caring process, and different using attitudes from seniors’ and caregivers’ perspective. We highlight the importance of customized design for varying expectations and the functions with uncomplicated rules. We propose design recommendations to better support end-users’ efforts to assess and improve the accessibility of ATs, and suggest a transfer from trying to ‘improving’ seniors’ lives to involving them and stakeholders in designing process.

Yuling Sun, Kai Ye, Liang He
China Normal University, Shanghai China
An Online-Offline Messaging System for People with Disabilities in China

Abstract: Because of the mobility problems, most people with motor-disabilities have few opportunities to communicate with others face to face, ICT (Information and Communication Technology) were the mainly way of communication for them. They can use it to help each other, share information, find many work opportunities and help them more fully integrated into society. In this position paper, we applied social translucence to design an online-offline messaging system for people with disabilities in China. In This system users can show some their information such as: location information, type of disabilities, recent operations and status, these information was expected to improve the quality of user experience and mutual awareness and accountability for one’s actions.

Peng Liu, Tun Lu, Ning Gu
Fudan University, Shanghai, China
12 16:40~17:00 Concluding Remarks