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Displaying 1-50 out of 62 total
NALP: Navigating Assistant for Large Display Presentation Using Laser Pointer
Found in: International Conference on Advances in Computer-Human Interaction
By Liang Zhang, Yuanchun Shi, Boliang Chen
Issue Date:February 2008
pp. 39-44
In this paper, we present NALP (Navigating Assistant using Laser Pointer), a novel interaction technique for large display presentation control. NALP is based on laser dot detection, track recognition and space segmentation, allowing users to manipulate th...
 
Fall Detection on Mobile Phones Using Features from a Five-Phase Model
Found in: 2012 IEEE 9th Int'l Conference on Ubiquitous Intelligence & Computing / 9th Int'l Conference on Autonomic & Trusted Computing (UIC/ATC)
By Yue Shi,Yuanchun Shi,Xia Wang
Issue Date:September 2012
pp. 951-956
The injuries caused by falls are great threats to the elderly people. With the ability of communication and motion sensing, the mobile phone is an ideal platform to detect the occurrence of fall accidents and help the injured person receive first aid. Howe...
 
Inertial Body-Worn Sensor Data Segmentation by Boosting Threshold-Based Detectors
Found in: 2012 16th Annual International Symposium on Wearable Computers (ISWC)
By Yue Shi,Yuanchun Shi,Xia Wang
Issue Date:June 2012
pp. 114-115
Using inertial body-worn sensors, we propose a segmentation approach to detect when a user changes actions. We use Adaboost to combine three threshold-based detectors: force/gravity ratios, peaks of autocorrelation, and local minimums of velocity. Experime...
 
The Smart Classroom: Merging Technologies for Seamless Tele-Education
Found in: IEEE Pervasive Computing
By Yuanchun Shi, Weikai Xie, Guangyou Xu, Runting Shi, Enyi Chen, Yanhua Mao, Fang Liu
Issue Date:April 2003
pp. 47-55
<p>The Smart Classroom lets teachers simultaneously instruct remote and local students. It provides a pen-based user interface on a projected display and a computer-vision-based module for selecting remote students using a laser pointer. A speech-cap...
 
Pervasive Service Bus: Smart SOA Infrastructure for Ambient Intelligence
Found in: IEEE Intelligent Systems
By Gang Pan,Li Zhang,Zhaohui Wu,Shijian Li,Laurence Yang,Man Lin,Yuanchun Shi
Issue Date:July 2014
pp. 52-60
Ambient intelligence (AmI) aims to make our everyday environments intelligent--that is, sensitive, adaptive, and responsive to the presence of people--in a transparent manner. Several challenges exist to building an efficient infrastructure for AmI, includ...
 
UI Portals: Sharing Arbitrary Regions of User Interfaces on Traditional and Multi-user Interactive Devices
Found in: 2012 IEEE 9th Int'l Conference on Ubiquitous Intelligence & Computing / 9th Int'l Conference on Autonomic & Trusted Computing (UIC/ATC)
By Jie Liu,Yuanchun Shi
Issue Date:September 2012
pp. 957-962
This paper introduces UI Portals, a novel approach to help users share their off-the-shelf applications' user interfaces on traditional and multi-user interactive devices among various platforms. Users can choose an application window or select parts of th...
 
Reducing Scalability Collapse via Requester-Based Locking on Multicore Systems
Found in: 2012 IEEE 20th International Symposium on Modelling, Analysis & Simulation of Computer and Telecommunication Systems (MASCOTS)
By Yan Cui,Yingxin Wang,Yu Chen,Yuanchun Shi,Wei Han,Xin Liao,Fei Wang
Issue Date:August 2012
pp. 298-307
In response to the increasing ubiquity of multicore processors, there has been widespread development of multithreaded applications that strive to realize their full potential. Unfortunately, lock contention within operating systems can limit the scalabili...
 
Experience on Comparison of Operating Systems Scalability on the Multi-core Architecture
Found in: Cluster Computing, IEEE International Conference on
By Yan Cui,Yingxin Wang,Yu Chen,Yuanchun Shi
Issue Date:September 2011
pp. 205-215
Multi-core processor architectures have become ubiquitous in today's computing platforms, especially in parallel computing installations, with their power and cost advantages. While the technology trend continues towards having hundreds of cores on a chip ...
 
How Much to Share: A Repeated Game Model for Peer-to-Peer Streaming under Service Differentiation Incentives
Found in: IEEE Transactions on Parallel and Distributed Systems
By Xin Xiao,Qian Zhang,Yuanchun Shi,Yuan Gao
Issue Date:February 2012
pp. 288-295
In this paper, we propose a service differentiation incentive for P2P streaming system, according to peers' instant contributions. Also, a repeated game model is designed to analyze how much the peers should contribute in each round under this incentive. S...
 
Reducing Shared Cache Contention by Scheduling Order Adjustment on Commodity Multi-cores
Found in: Parallel and Distributed Processing Workshops and PhD Forum, 2011 IEEE International Symposium on
By Yingxin Wang,Yan Cui,Pin Tao,Haining Fan,Yu Chen,Yuanchun Shi
Issue Date:May 2011
pp. 984-992
Due to the limitation of power and processor complexity on traditional single core processors, multi-core processors have become the mainstream. One key feature on commodity multi-cores is that the last level cache (LLC) is usually shared. However, the sha...
 
A Scheduling Method for Avoiding Kernel Lock Thrashing on Multi-cores
Found in: Parallel and Distributed Systems, International Conference on
By Yan Cui, Weida Zhang, Yu Chen, Yuanchun Shi
Issue Date:December 2010
pp. 17-26
Multi-core architectures have been adopted in various computing environments. Predictions based on Moore's Law state that thousands of cores can be integrated on a single chip within 10 years. To achieve better performance and scalability on multi-cores, a...
 
A Discrete Event Simulation Model for Understanding Kernel Lock Thrashing on Multi-core Architectures
Found in: Parallel and Distributed Systems, International Conference on
By Yan Cui, Weiyi Wu, Yingxin Wang, Xufeng Guo, Yu Chen, Yuanchun Shi
Issue Date:December 2010
pp. 1-8
Multi-core architectures have become mainstream. Trends suggest that the number of cores integrated on a single chip will increase continuously. However, lock contention in operating systems can limit the parallel scalability on multi-cores so significantl...
 
HouseGenie: Universal Monitor and Controller of Networked Devices on Touchscreen Phone in Smart Home
Found in: Ubiquitous, Autonomic and Trusted Computing, Symposia and Workshops on
By Yue Suo, Chenjun Wu, Yongqiang Qin, Chun Yu, Yu Zhong, Yuanchun Shi
Issue Date:October 2010
pp. 487-489
Touch screen phone roaming with people features high accessibility and direct-manipulation interaction, regarded as one of the most convenient interfaces for daily life. In this paper, we present House Genie to leverage universal monitor and control of net...
 
Reinventing Lock Modeling for Multi-Core Systems
Found in: Modeling, Analysis, and Simulation of Computer Systems, International Symposium on
By Yan Cui, Weiyi Wu, Yingxin Wang, Xufeng Guo, Yu Chen, Yuanchun Shi
Issue Date:August 2010
pp. 455-457
Multi-core architectures have become mainstream. Trends suggest that the number of cores integrated on a single chip will continue to increase. However, lock contention in applications or kernels can degrade the scalability so significantly that the speedu...
 
CFS Optimizations to KVM Threads on Multi-Core Environment
Found in: Parallel and Distributed Systems, International Conference on
By Wei Jiang, Yisu Zhou, Yan Cui, Wei Feng, Yu Chen, Yuanchun Shi, Qingbo Wu
Issue Date:December 2009
pp. 348-354
Multi-core architecture provides more on-chip parallelism and powerful computational capability. It helps virtualization achieve scalable performance. KVM (kernel based virtual machine) is different from other virtualization solutions which can make use of...
 
Enhanced Gestalt Theory Guided Web Page Segmentation for Mobile Browsing
Found in: Web Intelligence and Intelligent Agent Technology, IEEE/WIC/ACM International Conference on
By Xin Yang, Yuanchun Shi
Issue Date:September 2009
pp. 46-49
This paper proposes a novel Web page segmentation method for mobile browsing, aiming to break a Web page into visually and semantically coherent units fitted to the limited screen size of mobile devices. We intend to simulate human’s perceptive process gui...
 
OSMark: A benchmark suite for understanding parallel scalability of operating systems on large scale multi-cores
Found in: Computer Science and Information Technology, International Conference on
By Yan Cui, Yu Chen, Yuanchun Shi
Issue Date:August 2009
pp. 313-317
With the development of transistor technology, multi-core has become mainstream. Predictions based on Moore's Law state that a processor chip can accommodate thousands of cores in 5–10 years. As the system software between applications and hardware, can op...
 
Toward Systematical Data Scheduling for Layered Streaming in Peer-to-Peer Networks: Can We Go Farther?
Found in: IEEE Transactions on Parallel and Distributed Systems
By Xin Xiao, Yuanchun Shi, Qian Zhang, Jianhua Shen, Yuan Gao
Publication Date: June 2009
pp. 685-697
Layered streaming in P2P networks has become a hot topic recently. However, the
 
UMDD: User Model Driven Software Development
Found in: Embedded and Ubiquitous Computing, IEEE/IFIP International Conference on
By Xiaochun Wang, Yuanchun Shi
Issue Date:December 2008
pp. 477-483
The existing software engineering seldom considers software usability, and Human-Computer Interaction (HCI) techniques which can improve the software usability cannot guarantee development efficiency. Recently, more and more stakeholders and users begin to...
 
Learning in an Ambient Intelligent World: Enabling Technologies and Practices
Found in: IEEE Transactions on Knowledge and Data Engineering
By Xiang Li, Ling Feng, Lizhu Zhou, Yuanchun Shi
Issue Date:June 2009
pp. 910-924
The rapid evolution of information and communication technology opens a wide spectrum of opportunities to change our surroundings into an Ambient Intelligent (AmI) world. AmI is a vision of future information society, where people are surrounded by a digit...
 
Open Smart Classroom: Extensible and Scalable Learning System in Smart Space Using Web Service Technology
Found in: IEEE Transactions on Knowledge and Data Engineering
By Yue Suo, Naoki Miyata, Hiroki Morikawa, Toru Ishida, Yuanchun Shi
Issue Date:June 2009
pp. 814-828
Real-time interactive virtual classroom with teleeducation experience is an important approach in distance learning. However, most current systems fail to meet new challenges in extensibility and scalability, which mainly lie with three issues. First, an o...
 
On Constructing High Performance Overlay for Layered Streaming in Heterogeneous Networks
Found in: Advanced Information Networking and Applications Workshops, International Conference on
By Xin Xiao, Yuanchun Shi, Zhijia Chen, Baopeng Zhang
Issue Date:March 2008
pp. 578-584
This paper presents the mechanism and evaluation of a Qos-aware Overlay Construction Approach for Layered Streaming, called OCals. The motivation originates from the lack of overlay construction method suitable for layered streaming, because in previous wo...
 
Speaker Tracking and Identifying Based on Indoor Localization System and Microphone Array
Found in: Advanced Information Networking and Applications Workshops, International Conference on
By Xiaojie Chen, Yuanchun Shi, Wenfeng Jiang
Issue Date:May 2007
pp. 347-352
This paper presents a novel multimodal system to track the participants and identify the active speaker in the smart meeting room. Indoor localization system, Cicada, is used to obtain the location and identity information of the participants. Cicada, deve...
 
Effective Page Segmentation Combining Pattern Analysis and Visual Separators for Browsing on Small Screens
Found in: Web Intelligence, IEEE / WIC / ACM International Conference on
By Peifeng Xiang, Xin Yang, Yuanchun Shi
Issue Date:December 2006
pp. 831-840
Page segmentation plays a key role in browsing on small screens. It breaks a large page into smaller segments according to their semantic relationships. Then, various approaches such as single column adaptation and thumbnail view with zooming links can be ...
 
The Design and Implementation of the Cicada Wireless Sensor Network Indoor Localization System
Found in: International Conference on Artificial Reality and Telexistence
By Wenfeng Jiang, Yu Chen, Yuanchun Shi, Yunfeng Sun
Issue Date:December 2006
pp. 536-541
The wireless sensor network based localization system--Cicada is designed to support the location-awareness in indoor environment. The system is based on TDOA (time difference of arrival) between radio frequency and ultrasonic to measure the distances, use...
 
Ermdclime: Enabling Real-time Multimedia Discussion for Collaborative Learning in Mobile Environment
Found in: Multimedia and Expo, IEEE International Conference on
By Xin Xiao, Yuanchun Shi, Nan Zhang
Issue Date:July 2006
pp. 2093-2096
With the aid of mobile technology, it's possible to carry out collaborative learning (CL) in any places at any time. And the most essential and effective way to achieve this goal is through real-time multimedia discussion. In this paper, a multi-agent syst...
 
HyMoNet: a peer-to-peer hybrid multicast overlay network for efficient live media streaming
Found in: Advanced Information Networking and Applications, International Conference on
By Bin Chang, Yuanchun Shi, Nan Zhang
Issue Date:April 2006
pp. 15-20
This paper presents HyMoNet, a peer-to-peer hybrid multicast overlay network for efficient live media streaming. The system comprises two parts: service infrastructure and user space. Service infrastructure contains the data stream servers manually deploye...
 
uPen: A Smart Pen-liked Device for Facilitating Interaction on Large Displays
Found in: Horizontal Interactive Human-Computer Systems, International Workshop on
By Xiaojun Bi, Yuanchun Shi, Xiaojie Chen
Issue Date:January 2006
pp. 160-168
This paper presents the uPen, a laser pointer combined with a contact-pushed switch, three press buttons and a wireless communication module. This novel interaction device allows users to interact on large displays at a distance or directly on the surface ...
 
Resource Management Based on Personal Service Aggregations in Smart Spaces
Found in: Software Technologies for Future Embedded and Ubiquitous Systems, IEEE Workshop on
By Peifeng Xiang, YuanChun Shi
Issue Date:May 2005
pp. 39-42
This paper introduces a novel resource management approach based on personal service aggregations (PSAs) for smart spaces. As a smart space is usually a sharable system that simultaneously provides services for multi-user but with limited computational res...
 
Use Web Usage Mining to Assist Online E-Learning Assessment
Found in: Advanced Learning Technologies, IEEE International Conference on
By Ling Guo, Xin Xiang, YuanChun Shi
Issue Date:September 2004
pp. 912-913
In this paper we present a set of models related to online learning activities. We also present our approach to assess student behavior through web log mining.
   
Rich Metadata Searches Using the JXTA Content Manager Service
Found in: Advanced Information Networking and Applications, International Conference on
By Xin Xiang, Yuanchun Shi, Ling Guo
Issue Date:March 2004
pp. 624
With the development of networking technologies and the advent of the peer-to-peer computing paradigm, distributed file-sharing systems like Gnutella are becoming prevalent over time. JXTA, an interoperable and platform independent peer-to-peer computing i...
 
Multi-Modal Face Tracking Using Bayesian Network
Found in: Analysis and Modeling of Faces and Gestures, IEEE International Workshop on
By Fang Liu, Xueyin Lin, Stan Z Li, Yuanchun Shi
Issue Date:October 2003
pp. 135
This paper presents a Bayesian network based multi-modal fusion method for robust and real-time face tracking. The Bayesian network integrates a prior of second order system dynamics, and the likelihood cues from color, edge and face appearance. While diff...
 
A Conformance Test Suite of Localized LOM Model
Found in: Advanced Learning Technologies, IEEE International Conference on
By Xin Xiang, Yuanchun Shi, Ling Guo
Issue Date:July 2003
pp. 288
Since the approval of IEEE LOM Draft Standard and the advance of network-driven learning technology, a large number of resource database constructors, content developers and learning management system vendors are likely to describe their relevant learning ...
   
Smart Platform — A Software Infrastructure for Smart Space (SISS)
Found in: Multimodal Interfaces, IEEE International Conference on
By Weikai Xie, Yuanchun Shi, Guanyou Xu, Yanhua Mao
Issue Date:October 2002
pp. 429
A software infrastructure is fundamental to a Smart Space. Previous proposed software infrastructure for Smart Space (SISS) did not sufficiently address the issue of performance and usability. A new solution, Smart Platform, which is focused on improving t...
 
LockSim: An Event-Driven Simulator for Modeling Spin Lock Contention
Found in: IEEE Transactions on Parallel and Distributed Systems
By Yan Cui,Yingxin Wang,Yu Chen,Yuanchun Shi
Issue Date:March 2014
pp. 1
Spin lock contention in operating systems can limit scalability on multicore systems so significantly that an increase in the number of cores actually leads to reduced speedup (i.e., scalability collapse). Modeling spin lock contention is an effective way ...
 
Requester-Based Spin Lock: A Scalable and Energy Efficient Locking Scheme on Multicore Systems
Found in: IEEE Transactions on Computers
By Yan Cui,Yingxin Wang,Yu Chen,Yuanchun Shi
Issue Date:October 2013
pp. 1
Lock contention within operating systems can limit the scalability of multicore systems so severely that an increase in the number of cores can actually lead to reduced performance. Existing lock implementations have disadvantages in scalability and energy...
 
uTable: a seamlessly tiled, very large interactive tabletop system
Found in: Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces (ITS '11)
By Chun Yu, Jie Liu, Yongqiang Qin, Yuanchun Shi, Yue Shi, Yuntao Wang, Zhouyue Su
Issue Date:November 2011
pp. 244-245
We present uTable, a very large horizontal interactive surface which accommodates up to ten people sitting around and interacting in parallel. We identify the key aspects for building such large interactive tabletops and discuss the pros and cons of potent...
     
A rotation based method for detecting on-body positions of mobile devices
Found in: Proceedings of the 13th international conference on Ubiquitous computing (UbiComp '11)
By Jie Liu, Yuanchun Shi, Yue Shi
Issue Date:September 2011
pp. 559-560
We present a novel rotation based method for detecting where a mobile device is worn on a user's body that utilizes the fusion of the data from accelerometer and gyroscope. Detecting the position of a mobile device could improve the performance of on-body ...
     
Air finger: enabling multi-scale navigation by finger height above the surface
Found in: Proceedings of the 13th international conference on Ubiquitous computing (UbiComp '11)
By Chun Yu, Xu Tan, Yuanchun Shi, Yue Shi
Issue Date:September 2011
pp. 495-496
We present Air Finger, a novel technique that enables controlling CD ratio by finger height above the touch sur-face for multi-scale navigation tasks. Extending previous research on virtual touch, Air Finger divides the space above surface into two layers ...
     
QOOK: enhancing information revisitation for active reading with a paper book
Found in: Proceedings of the 8th International Conference on Tangible, Embedded and Embodied Interaction (TEI '14)
By Siqi Liu, Taoshuai Zhang, Yang Liu, Yongqiang Qin, Yuanchun Shi, Yuhang Zhao
Issue Date:February 2014
pp. 125-132
Revisiting information on previously accessed pages is a common activity during active reading. Both physical and digital books have their own benefits in supporting such activity according to their manipulation natures. In this paper, we introduce QOOK, a...
     
QOOK: a new physical-virtual coupling experience for active reading
Found in: Proceedings of the adjunct publication of the 26th annual ACM symposium on User interface software and technology (UIST '13 Adjunct)
By Siqi Liu, Yang Liu, Yongqiang Qin, Yuanchun Shi, Yuhang Zhao
Issue Date:October 2013
pp. 5-6
We present QOOK, an interactive reading system that incorporates the benefits of both physical and digital books to facilitate active reading. QOOK uses a top-projector to create digital contents on a blank paper book. By detecting markers attached to each...
     
Facilitating parallel web browsing through multiple-page view
Found in: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13)
By Chun Yu, Jie Liu, Songmin Zhao, Wenchang Xu, Yuanchun Shi
Issue Date:April 2013
pp. 2167-2170
Parallel web browsing describes the behavior where users visit web pages in multiple concurrent threads. Qualitative studies have observed this activity being performed with multiple browser windows or tabs. However, these solutions are not satisfying sinc...
     
Hero: designing learning tools to increase parental involvement in elementary education in china
Found in: CHI '13 Extended Abstracts on Human Factors in Computing Systems (CHI EA '13)
By Alexis Hope, James A. Landay, Jin Huang, Yoel Sumitro, Yuanchun Shi, Yuhang Zhao
Issue Date:April 2013
pp. 637-642
In this paper, we present the design of Hero, a suite of learning tools that combine teacher-created extracurricular challenges with in-class motivational tools to help parents become more involved in their child's education, while also engaging students i...
     
Lock-contention-aware scheduler: A scalable and energy-efficient method for addressing scalability collapse on multicore systems
Found in: ACM Transactions on Architecture and Code Optimization (TACO)
By Yan Cui, Yingxin Wang, Yu Chen, Yuanchun Shi
Issue Date:January 2013
pp. 1-25
In response to the increasing ubiquity of multicore processors, there has been widespread development of multithreaded applications that strive to realize their full potential. Unfortunately, lock contention within operating systems can limit the scalabili...
     
uEmergency: a collaborative system for emergency management on very large tabletop
Found in: Proceedings of the 2012 ACM international conference on Interactive tabletops and surfaces (ITS '12)
By Chenjun Wu, Jie Liu, Yongqiang Qin, Yuanchun Shi
Issue Date:November 2012
pp. 399-402
The vertical display, indirect input and distant communication in traditional Emergency Management Information System provide unintuitive human-computer-interaction, and thus reduce the efficiency of decision-making. This paper presents uEmergency, a multi...
     
PiMarking: co-located collaborative digital annotating on large tabletops
Found in: Proceedings of the 2012 ACM international conference on Interactive tabletops and surfaces (ITS '12)
By Chenjun Wu, Yongqiang Qin, Yuanchun Shi
Issue Date:November 2012
pp. 395-398
There are situations under which co-located people are required to perform collaborative marking tasks: for example, human resource officers need to review resumes together and teachers need to grade answer sheets after an examination. In this poster, we i...
     
Mobile assistant: enhancing desktop interaction using mobile phone
Found in: Proceedings of the 2012 ACM international conference on Interactive tabletops and surfaces (ITS '12)
By Chun Yu, Haijun Xia, Jingning Zhang, Yeshuang Zhu, Yuanchun Shi
Issue Date:November 2012
pp. 379-382
Touchscreen of mobile phone is an important input channel, whereas most desktop computers have no such a modality. Furthermore, we observe a common situation where ubiquitous mobile phones are placed aside while users operate computers. In this poster, we ...
     
Smart home on smart phone
Found in: Proceedings of the 13th international conference on Ubiquitous computing (UbiComp '11)
By Chun Yu, Wenchang Xu, Xinwei Guo, Yu Zhong, Yuanchun Shi, Yue Suo, Yuhang Zhao
Issue Date:September 2011
pp. 467-468
Mobile phone with high accessibility and usability is regarded as the ideal interface for the users to monitor and control the approaching smart home environment. Moreover, networking technologies and protocols have been advanced enough to support a univer...
     
Comparison of lock thrashing avoidance methods and its performance implications for lock design
Found in: Proceedings of the third international workshop on Large-scale system and application performance (LSAP '11)
By Yan Cui, Yu Chen, Yuanchun Shi
Issue Date:June 2011
pp. 3-10
Multicore processors have been ubiquitously used in various computing environments. To achieve the performance potential on multicores, applications are often designed to be multithreaded, therefore threads assigned on different cores can execute in parall...
     
RegionalSliding: enhancing target selection on touchscreen-based mobile devices
Found in: Proceedings of the 2011 annual conference extended abstracts on Human factors in computing systems (CHI EA '11)
By Chun Yu, Wenchang Xu, Yuanchun Shi
Issue Date:May 2011
pp. 1261-1266
Target selection on mobile devices with touchscreens usually gets users into trouble due to the occlusion of the target by the user's finger and ambiguity about which part of the finger generates the result point. In this paper, we propose a novel techniqu...
     
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