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Displaying 1-33 out of 33 total
A Hybrid Sensor System for Indoor Air Quality Monitoring
Found in: 2013 IEEE International Conference on Distributed Computing in Sensor Systems (DCOSS)
By Yun Xiang,Ricardo Piedrahita,Robert P. Dick,Michael Hannigan,Qin Lv,Li Shang
Issue Date:May 2013
pp. 96-104
Indoor air quality is important. It influences human productivity and health. Personal pollutant exposure can be measured using stationary or mobile sensor networks, but each of these approaches has drawbacks. Stationary sensor network accuracy suffers bec...
 
Detecting Misbehavior in Online Video Chat Services
Found in: IEEE Internet Computing
By Qin Lv
Issue Date:May 2013
pp. 76-79
Randomly pairing up strangers in online video chat services has quickly gained popularity over the past few years. One major issue that has emerged is the existence of misbehaviors and obscene content. Detecting misbehavior in online video chat services re...
 
Fusing Text and Frienships for Location Inference in Online Social Networks
Found in: 2012 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT)
By Hansu Gu,Haojie Hang,Qin Lv,Dirk Grunwald
Issue Date:December 2012
pp. 158-165
Location information is becoming prevalent in today's online social networks (OSNs), which raises special privacy concerns with regard to both location sharing and its applications. Even when no explicit location is disclosed by a user, it is possible to g...
 
Pistis: A Privacy-Preserving Content Recommender System for Online Social Communities
Found in: Web Intelligence and Intelligent Agent Technology, IEEE/WIC/ACM International Conference on
By Dongsheng Li,Qin Lv,Huanhuan Xia,Li Shang,Tun Lu,Ning Gu
Issue Date:August 2011
pp. 79-86
With the explosive growth of online social communities and massive user-generated content, privacy-preserving recommender systems, which identify information of interest to individual users without disclosing personal interests to other parties, have becom...
 
ETree: Effective and Efficient Event Modeling for Real-Time Online Social Media Networks
Found in: Web Intelligence and Intelligent Agent Technology, IEEE/WIC/ACM International Conference on
By Hansu Gu,Xing Xie,Qin Lv,Yaoping Ruan,Li Shang
Issue Date:August 2011
pp. 300-307
Outline social media networks (OSMNs) such as Twitter provide great opportunities for public engagement and event information dissemination. Event-related discussions occur in real time and at the worldwide scale. However, these discussions are in the form...
 
Study on Preview Control Theory for Trajectory Tracking Control
Found in: Computational Aspects of Social Networks, International Conference on
By Liu Xiao-Feng, Tian Mu-Qin, Lv Yong-Wei, Wang Shu-Hua
Issue Date:September 2010
pp. 445-447
Trajectory tracking is popularity in industrial procession, such as machining parts control, high automatic control for a roller of shearer cutting in memory mode, etc. In these cases, trajectory tracked was often artificially pre-determined, and essential...
 
AnchorMF: towards effective event context identification
Found in: Proceedings of the 22nd ACM international conference on Conference on information & knowledge management (CIKM '13)
By Liang Zhang, Mike Gartrell, Dirk Grunwald, Hansu Gu, Qin Lv
Issue Date:October 2013
pp. 629-638
Online social networks (OSNs) such as Twitter provide a good platform for event discussions. Recent research [26][25] as shown that event discussions in OSNs are diverse and innovative and encourage public engagement in events. Although much research has b...
     
Understanding user behavior at scale in a mobile video chat application
Found in: Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing (UbiComp '13)
By David Chu, Junho Ahn, Lei Tian, Qin Lv, Richard Han, Shaosong Li, Shivakant Mishra
Issue Date:September 2013
pp. 647-656
Online video chat services such as Chatroulette and Omegle randomly match users in video chat sessions and have become increasingly popular, with tens of thousands of users online at anytime during a day. Our interest is in examining user behavior in the g...
     
Hallway based automatic indoor floorplan construction using room fingerprints
Found in: Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing (UbiComp '13)
By Kun Li, Li Shang, Michael Hannigan, Qin Lv, Robert P. Dick, Xin Pan, Yifei Jiang, Yun Xiang
Issue Date:September 2013
pp. 315-324
People spend approximately 70% of their time indoors. Understanding the indoor environments is therefore important for a wide range of emerging mobile personal and social applications. Knowledge of indoor floorplans is often required by these applications....
     
SafeVchat: A System for Obscene Content Detection in Online Video Chat Services
Found in: ACM Transactions on Internet Technology (TOIT)
By Hanqiang Cheng, Jianxun Dang, Qin Lv, Richard Han, Shivakant Mishra, Sui Huang, Xinyu Xing, Xue Liu, Yu-Li Liang
Issue Date:July 2013
pp. 1-26
Online video chat services such as Chatroulette, Omegle, and vChatter that randomly match pairs of users in video chat sessions are quickly becoming very popular, with over a million users per month in the case of Chatroulette. A key problem encountered in...
     
ARIEL: automatic wi-fi based room fingerprinting for indoor localization
Found in: Proceedings of the 2012 ACM Conference on Ubiquitous Computing (UbiComp '12)
By Kun Li, Li Shang, Michael Hannigan, Qin Lv, Robert P. Dick, Xin Pan, Yifei Jiang
Issue Date:September 2012
pp. 441-450
People spend the majority of their time indoors, and human indoor activities are strongly correlated with the rooms they are in. Room localization, which identifies the room a person or mobile phone is in, provides a powerful tool for characterizing human ...
     
Scalable misbehavior detection in online video chat services
Found in: Proceedings of the 18th ACM SIGKDD international conference on Knowledge discovery and data mining (KDD '12)
By Hanqiang Cheng, Qin Lv, Richard Han, Shivakant Mishra, Sui Huang, Xinyu Xing, Xue Liu, Yi Zhu, Yu-li Liang
Issue Date:August 2012
pp. 552-560
The need for highly scalable and accurate detection and filtering of misbehaving users and obscene content in online video chat services has grown as the popularity of these services has exploded in popularity. This is a challenging problem because process...
     
Demo: MVChat: flasher detection for mobile video chat
Found in: Proceedings of the 10th international conference on Mobile systems, applications, and services (MobiSys '12)
By David Chu, Hanqiang Cheng, Junho Ahn, Lei Tian, Qin Lv, Richard Han, Shivakant Mishra, Xinyu Xing, Xue Liu, Yuli Liang
Issue Date:June 2012
pp. 457-458
Online video chat services such as Chatroulette [1] and Omegle [2] that randomly match pairs of users in video chat sessions have become increasingly popular, with over twenty thousand online users at anytime during a day. A key problem encountered in such...
     
Collaborative calibration and sensor placement for mobile sensor networks
Found in: Proceedings of the 11th international conference on Information Processing in Sensor Networks (IPSN '12)
By Michael Hannigan, Qin Lv, Ricardo Piedrahita, Robert P. Dick, Yun Xiang, Lan Bai, Li Shang
Issue Date:April 2012
pp. 73-84
Mobile sensing systems carried by individuals or machines make it possible to measure position- and time-dependent environmental conditions, such as air quality and radiation. The low-cost, miniature sensors commonly used in these systems are prone to meas...
     
Efficient misbehaving user detection in online video chat services
Found in: Proceedings of the fifth ACM international conference on Web search and data mining (WSDM '12)
By Hanqiang Cheng, Richard Han, Shivakant Mishra, Xue Liu, Qin Lv, Xinyu Xing, Yu-Li Liang
Issue Date:February 2012
pp. 23-32
Online video chat services, such as Chatroulette, Omegle, and vChatter are becoming increasingly popular and have attracted millions of users. One critical problem encountered in such applications is the presence of misbehaving users ("flashers") and obsce...
     
YANA: an efficient privacy-preserving recommender system for online social communities
Found in: Proceedings of the 20th ACM international conference on Information and knowledge management (CIKM '11)
By Dongsheng Li, Li Shang, Ning Gu, Qin Lv
Issue Date:October 2011
pp. 2269-2272
In online social communities, many recommender systems use collaborative filtering, a method that makes recommendations based on what are liked by other users with similar interests. Serious privacy issues may arise in this process, as sensitive personal i...
     
MAQS: a mobile sensing system for indoor air quality
Found in: Proceedings of the 13th international conference on Ubiquitous computing (UbiComp '11)
By Kun Li, Lei Tian, Li Shang, Michael Hannigan, Omkar Mansata, Qin Lv, Ricardo Piedrahita, Robert P. Dick, Xiang Yun, Yifei Jiang
Issue Date:September 2011
pp. 493-494
Most people spend more than 90% of their time indoors. Indoor air quality (IAQ) influences human health, safety, productivity, and comfort. This demo introduces MAQS, a personalized mobile sensing system for IAQ monitoring. In contrast with existing statio...
     
Deliberation for intuition: a framework for energy-efficient trip detection on cellular phones
Found in: Proceedings of the 13th international conference on Ubiquitous computing (UbiComp '11)
By Du Li, Guang Yang, Qin Lv, Yifei Jiang, Zhigang Liu
Issue Date:September 2011
pp. 315-324
Trip detection is a fundamental issue in many context-sensitive information services on mobile devices. It aims to automatically recognize significant places and trips between them. The key challenge is how to minimize energy consumption while maintaining ...
     
MAQS: a personalized mobile sensing system for indoor air quality monitoring
Found in: Proceedings of the 13th international conference on Ubiquitous computing (UbiComp '11)
By Kun Li, Lei Tian, Li Shang, Michael Hannigan, Omkar Mansata, Qin Lv, Ricardo Piedrahita, Robert P. Dick, Xiang Yun, Yifei Jiang
Issue Date:September 2011
pp. 271-280
Most people spend more than 90% of their time indoors; indoor air quality (IAQ) influences human health, safety, productivity, and comfort. This paper describes MAQS, a personalized mobile sensing system for IAQ monitoring. In contrast with existing statio...
     
SafeVchat: detecting obscene content and misbehaving users in online video chat services
Found in: Proceedings of the 20th international conference on World wide web (WWW '11)
By Hanqiang Cheng, Jianxun Dang, Qin Lv, Richard Han, Shivakant Mishra, Sui Huang, Xinyu Xing, Xue Liu, Yu-Li Liang
Issue Date:March 2011
pp. 685-694
Online video chat services such as Chatroulette, Omegle, and vChatter that randomly match pairs of users in video chat sessions are fast becoming very popular, with over a million users per month in the case of Chatroulette. A key problem encountered in su...
     
Enhancing group recommendation by incorporating social relationship interactions
Found in: Proceedings of the 16th ACM international conference on Supporting group work (GROUP '10)
By Aaron Beach, Karim Seada, Mike Gartrell, Qin Lv, Richard Han, Shivakant Mishra, Xinyu Xing
Issue Date:November 2010
pp. 97-106
Group recommendation, which makes recommendations to a group of users instead of individuals, has become increasingly important in both the workspace and people's social activities, such as brainstorming sessions for coworkers and social TV for family memb...
     
Hybrid energy storage system integration for vehicles
Found in: Proceedings of the 16th ACM/IEEE international symposium on Low power electronics and design (ISLPED '10)
By Hai Zhou, Jia Wang, Kun Li, Li Shang, Qin Lv
Issue Date:August 2010
pp. 369-374
Energy consumption and the associated environmental impact are a pressing challenge faced by the transportation sector. Emerging electric-drive vehicles have shown promises for substantial reductions in petroleum use and vehicle emissions. Their success, h...
     
Large-scale battery system modeling and analysis for emerging electric-drive vehicles
Found in: Proceedings of the 16th ACM/IEEE international symposium on Low power electronics and design (ISLPED '10)
By Dragan Maksimovic, Jie Wu, Kun Li, Li Shang, Qin Lv, Yifei Jiang, Zyad Hassan
Issue Date:August 2010
pp. 277-282
Emerging electric-drive vehicles demonstrate the potential for significant reduction of petroleum consumption and greenhouse gas emissions. Existing electric-drive vehicles typi- cally include a battery system consisting of thousands of Lithium-ion battery...
     
Fusing mobile, sensor, and social data to fully enable context-aware computing
Found in: Proceedings of the Eleventh Workshop on Mobile Computing Systems & Applications (HotMobile '10)
By Aaron Beach, Karim Seada, Mike Gartrell, Qin Lv, Richard Han, Shivakant Mishra, Xinyu Xing
Issue Date:February 2010
pp. 60-65
In this paper, we identify mobile social networks as an important new direction of research in mobile computing, and show how an expanded definition of mobile social networks that includes sensor networks can enable exciting new context-aware applications,...
     
iScope: personalized multi-modality image search for mobile devices
Found in: Proceedings of the 7th international conference on Mobile systems, applications, and services (Mobisys '09)
By Changyun Zhu, Kun Li, Li Shang, Qin Lv, Robert P. Dick
Issue Date:June 2009
pp. 1-2
Mobile devices are becoming a primary medium for personal information gathering, management, and sharing. Managing personal image data on mobile platforms is a difficult problem due to large data set size, content diversity, heterogeneous individual usage ...
     
Sizing sketches: a rank-based analysis for similarity search
Found in: Proceedings of the 2007 ACM SIGMETRICS international conference on Measurement and modeling of computer systems (SIGMETRICS '07)
By Kai Li, Moses Charikar, Qin Lv, Wei Dong, William Josephson, Zhe Wang
Issue Date:June 2007
pp. 157-168
Sketches are compact data structures that can be used to estimate properties of the original data in building large-scale search engines and data analysis systems. Recent theoretical and experimental studies have shown that sketches constructed from featur...
     
Efficient filtering with sketches in the ferret toolkit
Found in: Proceedings of the 8th ACM international workshop on Multimedia information retrieval (MIR '06)
By Kai Li, Moses Charikar, Qin Lv, William Josephson, Zhe Wang
Issue Date:October 2006
pp. 279-288
Ferret is a toolkit for building content-based similarity search systems for feature-rich data types such as audio, video, and digital photos.The key component of this toolkit is a content-based similarity search engine for generic, multi-feature object re...
     
Ferret: a toolkit for content-based similarity search of feature-rich data
Found in: Proceedings of the 2006 EuroSys conference (EuroSys '06)
By Kai Li, Moses Charikar, Qin Lv, William Josephson, Zhe Wang
Issue Date:April 2006
pp. 2-es
Building content-based search tools for feature-rich data has been a challenging problem because feature-rich data such as audio recordings, digital images, and sensor data are inherently noisy and high dimensional. Comparing noisy data requires comparison...
     
Image similarity search with compact data structures
Found in: Proceedings of the Thirteenth ACM conference on Information and knowledge management (CIKM '04)
By Kai Li, Moses Charikar, Qin Lv
Issue Date:November 2004
pp. 208-217
The recent theoretical advances on compact data structures (also called "sketches") have raised the question of whether they can effectively be applied to content-based image retrieval systems. The main challenge is to derive an algorithm that achieves hig...
     
Search and replication in unstructured peer-to-peer networks
Found in: Proceedings of the 16th international conference on Supercomputing (ICS '02)
By Edith Cohen, Kai Li, Pei Cao, Qin Lv, Scott Shenker
Issue Date:June 2002
pp. 84-95
Decentralized and unstructured peer-to-peer networks such as Gnutella are attractive for certain applications because they require no centralized directories and no precise control over network topology or data placement. However, the flooding-based query ...
     
Search and replication in unstructured peer-to-peer networks
Found in: Proceedings of the 2002 ACM SIGMETRICS international conference on Measurement and modeling of computer systems (SIGMETRICS '02)
By Edith Cohen, Kai Li, Pei Cao, Qin Lv, Scott Shenker
Issue Date:June 2002
pp. 261-269
Decentralized and unstructured peer-to-peer networks such as Gnutella are attractive for certain applications because they require no centralized directories and no precise control over network topology or data placement. However, the flooding-based query ...
     
Dynamic Authorization of Grid Based on Trust Mechanism
Found in: Intelligence Information Processing and Trusted Computing, International Symposium on
By Xiao-jun Zhu, Shi-qin Lv, Xue-li Yu, Guang-Ping Zuo
Issue Date:October 2010
pp. 417-421
In order to ensure the security of the sharing service in grid, a dynamic authorization model based on trust mechanism is presented, which is based on role-based access control. In the model authorization is obtained while the trust worthiness of the barga...
 
EBAT: Energy Balanced Adaptive Transmission Algorithm for Sensor Networks
Found in: Network and Parallel Computing Workshops, IFIP International Conference on
By Yu-ting Sun, Wei-qin Lv, Li-peng Zhang, Peng Zhou
Issue Date:October 2008
pp. 565-574
Abstract—In wireless sensor networks, balanced energy dissipation is crucial to achieving satisfactory network lifetime. Since all data packets usually have to be forwarded to the base station via multi-hop routing, the traffic pattern is highly non-unifor...
 
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