Dexmo: An Inexpensive and Lightweight Mechanical Exoskeleton for Motion
Capture and Force Feedback in VR
VR & Feedback
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Gu, Xiaochi
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Zhang, Yifei
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Sun, Weize
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Bian, Yuanzhe
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Zhou, Dao
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Kristensson, Per Ola
Proceedings of the ACM CHI'16 Conference on Human Factors in Computing
Systems
2016-05-07
v.1
p.1991-1995
© Copyright 2016 ACM
Summary: We present Dexmo: an inexpensive and lightweight mechanical exoskeleton
system for motion capturing and force feedback in virtual reality applications.
Dexmo combines multiple types of sensors, actuation units and link rod
structures to provide users with a pleasant virtual reality experience. The
device tracks the user's motion and uniquely provides passive force feedback.
In combination with a 3D graphics rendered environment, Dexmo provides the user
with a realistic sensation of interaction when a user is for example grasping
an object. An initial evaluation with 20 participants demonstrate that the
device is working reliably and that the addition of force feedback resulted in
a significant reduction in error rate. Informal comments by the participants
were overwhelmingly positive.
BoomChaCha: A Rhythm-based, Physical Role-Playing Game that Facilitates
Cooperation among Players
Student Game Competition
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Zhu, Fengyuan
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Sun, Wangshu
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Zhang, Carrie
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Ricks, Rebecca
Extended Abstracts of the ACM CHI'16 Conference on Human Factors in
Computing Systems
2016-05-07
v.2
p.184-187
© Copyright 2016 ACM
Summary: We designed a new genre of gaming that is rhythm-based, cooperative,
physical and involves role-playing. In the game, three players as a team combat
monsters by waving physical weapons on certain beats of the background music.
The game requires a collective effort, as each player plays a certain role that
is responsible for attacking, healing or defending respectively. To defeat the
monster, the three players need to wave the physical weapons according to the
rhythm of a six-beat waltz, which encourages cooperation and promotes
pro-social behaviors.
GLUE: a Parameter-Tuning-Free Map Updating System
Session 4A: Location-Based Services
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Wu, Hao
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Tu, Chuanchuan
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Sun, Weiwei
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Zheng, Baihua
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Su, Hao
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Wang, Wei
Proceedings of the 2015 ACM Conference on Information and Knowledge
Management
2015-10-19
p.683-692
© Copyright 2015 ACM
Summary: Map data are widely used in mobile services, but most maps might not be
complete. Updating the map automatically is an important problem because road
networks are frequently changed with the development of the city. This paper
studies the problem of recovering missing road segments via GPS trajectories,
especially low sampled data. Our approach takes the GPS noise into
consideration and proposes an effective self-adaptive algorithm. Besides, we
propose theoretical models behind all the important parameters to enable
self-adaptive parameter setting. To the best of our knowledge, this is the
first work that addresses the parameter setting issue successfully to make sure
our approach is free of parameter-tuning. In addition, we also propose a
quantitative evaluation method for map updating problem. The result shows our
algorithm has a much better performance than the existing approaches.
COBWEB: a robust map update system using GPS trajectories
Localization and navigation
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Shan, Zhangqing
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Wu, Hao
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Sun, Weiwei
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Zheng, Baihua
Proceedings of the 2015 International Conference on Ubiquitous Computing
2015-09-07
p.927-937
© Copyright 2015 ACM
Summary: The accuracy and completeness of a digital map plays a critical role in
determining the quality of most location-based services. Unfortunately, road
networks change frequently. Consequently, we study the issue of automatic map
update in this paper. We propose a system called COBWEB which takes all the
unmatched trajectories as input and generates the missing road segments with
both the geometry properties and topology features well preserved. We conduct a
comprehensive experimental study via real trajectory data generated by roughly
15,000 taxis in Singapore within a 5-month period. Compared with existing work,
COBWEB demonstrates a better and more stable performance and a stronger
resilience to various sampling rates and data sizes.
Questionnaire Survey on Attention of Young Adults
Cognitive and Psychological Issues in HCI
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Du, Junmin
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Sun, Weiyu
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Wang, Xiaofan
HCI International 2015: 17th International Conference on HCI: Posters'
Extended Abstracts, Part I
2015-08-02
v.4
p.93-97
Keywords: Attention; Distraction; Questionnaire survey; Young adults
© Copyright 2015 Springer International Publishing Switzerland
Summary: Attention plays an important role in guaranteeing the safety and efficiency
of task operation. People may get distracted by various internal and external
causes. There are differences between individuals in their reaction to the
distractions. Understanding the characteristics of attention is the basis for
human-machine interface design. In this study, a questionnaire was designed,
which concerned personality, environment, task, biological clock, self
awareness and self control etc. 138 questionnaires were collected from young
adults. Based on the questionnaires, the features of young adults' attention
were described. The study results are helpful for the designer to know young
people better in the attention characteristics, so as to get benefits for
man-machine interface and task design.
What Size Should A Mobile Ad Be?
OOEW 2015
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Wang, Pengyuan
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Sun, Wei
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Yin, Dawei
Companion Proceedings of the 2015 International Conference on the World Wide
Web
2015-05-18
v.2
p.943-944
© Copyright 2015 ACM
Summary: We present a causal inference framework for evaluating the impact of
advertising treatments. Our framework is computationally efficient by employing
a tree structure that specifies the relationship between user characteristics
and the corresponding ad treatment. We illustrate the applicability of our
proposal on a novel advertising effectiveness study: finding the best ad size
on different mobile devices in order to maximize the success rates. The study
shows a surprising phenomenon that a larger mobile device does not need a
larger ad. In particular, the 300*250 ad size is universally good for all the
mobile devices, regardless of the mobile device size.
Indoor air quality monitoring system for smart buildings
Energy & environment
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Chen, Xuxu
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Zheng, Yu
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Chen, Yubiao
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Jin, Qiwei
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Sun, Weiwei
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Chang, Eric
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Ma, Wei-Ying
Proceedings of the 2014 International Joint Conference on Pervasive and
Ubiquitous Computing
2014-09-13
v.1
p.471-475
© Copyright 2014 ACM
Summary: Many developing countries are suffering from air pollution, especially the
Particulate Matter with diameter of 2.5 micrometers or less (PM2.5). While
quite a few air quality monitoring stations have been built by governments in a
city's public areas, the indoor PM2.5 has not yet been monitored and dealt with
effectively. Though many office buildings have an HVAC (heating, ventilation,
and air conditioning) system, PM2.5 is not considered as a factor when the
system circulates fresh air from outdoors. This paper introduces a real system
that we have deployed in the offices of four Microsoft campuses in China. This
system instantly monitors indoor air quality on different floors of a building
(including office areas, gyms, garages, and restaurants), enabling Microsoft
employees to enquire the air quality of a place by using a mobile phone or
checking a website. The information can guide a user's decision making, e.g.,
finding the right time to work out in the gym or turn on individual air filters
in her own office. Through analyzing the indoor and outdoor air quality data
collected over a long period, our system can even offer actionable and
energy-efficient suggestion to HVAC systems, e.g., automatically turning on the
system only a few hours earlier than usual if it is a heavily polluted day, or
identifying the filters in HVAC system that should be renewed.
Intelligent sleep stage mining service with smartphones
Body signals
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Gu, Weixi
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Yang, Zheng
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Shangguan, Longfei
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Sun, Wei
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Jin, Kun
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Liu, Yunhao
Proceedings of the 2014 International Joint Conference on Pervasive and
Ubiquitous Computing
2014-09-13
v.1
p.649-660
© Copyright 2014 ACM
Summary: Sleep quality plays a significant role in personal health. A great deal of
effort has been paid to design sleep quality monitoring systems, providing
services ranging from bedtime monitoring to sleep activity detection. However,
as sleep quality is closely related to the distribution of sleep duration over
different sleep stages, neither the bedtime nor the intensity of sleep
activities is able to reflect sleep quality precisely. To this end, we present
Sleep Hunter, a mobile service that provides a fine-grained detection of sleep
stage transition for sleep quality monitoring and intelligent wake-up call. The
rationale is that each sleep stage is accompanied by specific yet
distinguishable body movements and acoustic signals. Leveraging the built-in
sensors on smartphones, Sleep Hunter integrates these physical activities with
sleep environment, inherent temporal relation and personal factors by a
statistical model for a fine-grained sleep stage detection. Based on the
duration of each sleep stage, Sleep Hunter further provides sleep quality
report and smart call service for users. Experimental results from over 30 sets
of nocturnal sleep data show that our system is superior to existing
actigraphy-based sleep quality monitoring systems, and achieves satisfying
detection accuracy compared with dedicated polysomnography-based devices.
Merged aggregate nearest neighbor query processing in road networks
DB track: query processing and privacy
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Sun, Weiwei
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Chen, Chong
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Zheng, Baihua
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Chen, Chunan
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Zhu, Liang
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Liu, Weimo
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Huang, Yan
Proceedings of the 2013 ACM Conference on Information and Knowledge
Management
2013-10-27
p.2243-2248
© Copyright 2013 ACM
Summary: Aggregate nearest neighbor query, which returns a common interesting point
that minimizes the aggregate distance for a given query point set, is one of
the most important operations in spatial databases and their application
domains. This paper addresses the problem of finding the aggregate nearest
neighbor for a merged set that consists of the given query point set and
multiple points needed to be selected from a candidate set, which we name as
merged aggregate nearest neighbor (MANN) query. This paper proposes an
effective algorithm to process MANN query in road networks based on our pruning
strategies. Extensive experiments are conducted to examine the behaviors of the
solutions and the overall experiments show that our strategies to minimize the
response time are effective and achieve several orders of magnitude speedup
compared with the baseline methods.
Providing customisation guidelines of mobile phones for manufacturers
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Choe, Pilsung
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Liao, Chen
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Sun, Wei
Behaviour and Information Technology
2012-10
v.31
n.10
p.983-994
© Copyright 2012 Taylor and Francis Group, LLC
Summary: Customisation of mobile phones is a process of producing products according
to individual needs on design, cost, and easiness of the phones. With the aim
of identifying the most important features in customising mobile phones, 288
questionnaires were collected and analysed. The result showed that 'text
message', 'battery', 'contacts', 'software updates', and 'display size' were
highly required to customise. Among six factors (physical design, technical
design, cost of entertainment, cost of information, cost of durability,
easiness of use) obtained from a factor analysis, the most important reason for
users to customise mobile phones was that they wanted to use a mobile phone
easily. Cost of durability and cost of information were also important
motivations for customisation of mobile phones. Finally, this research showed
that gender and user experience were significant factors for customisation.
JMS-Java-Based Meeting Space
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Sun, Wei
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Lee, Bu Sung
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Yeo, Chai Kiat
Journal of Organizational Computing and Electronic Commerce
2000
v.10
n.3
p.171-188
© Copyright 2000 Lawrence Erlbaum Associates
Summary: The convergence of business, technology, and market forces have brought
about the computer-supported cooperative work (CSCW) phenomena. Many CSCW
systems adopt an inflexible style of collaboration and coordination. The
problem becomes obvious when different application tools are integrated into a
single, comprehensive CSCW system and various applications need different
degrees of interaction mode. We introduce JMS (Java-based meeting space), an
object-oriented framework for developing synchronous collaborative
applications. The JMS framework provides a comprehensive collection of services
that supports cooperative interaction at system level. The application
developers can tailor some of these services to the specific needs of
particular collaborative applications and usage situations. These services are
grouped into three main categories. First, JMS provides session management
service supporting dynamic integration of application tools as well as dynamic
membership. Second, group awareness service guarantees allotted communications
within a session. Third, JMS offers floor control service accommodating a set
of policies as well as underlying mechanisms. The application developer can
bind a floor control to an application tool and switch from one floor policy to
another during the session. Our implementation is based on a fully,
object-oriented replicated architecture in which the application and management
services are replicated at each site. To illustrate the feasibility of JMS in a
practical organizational environment, an electronic meeting incorporating
voting has been built on the JMS framework. We also provide a brief overview of
CSCW and its significance in organizational computing-in electronic meeting, in
particular-and compare JMS with other related works.
