@conference {523, title = {A Collaborative and Adaptive Feedback System for Physical Exercises}, booktitle = {2021 IEEE 7th International Conference on Collaboration and Internet Computing (CIC)}, year = {2021}, publisher = {IEEE}, organization = {IEEE}, address = {Atlanta, GA, USA}, abstract = {

Maintaining motivation to meet physical exercise goals is a big challenge in virtual/home-based exercise guidance systems. Lack of motivation, long-maintained bad daily routines, and fear of injury are some of the reasons that cause this hesitation. This paper proposes a reinforcement learning-based virtual exercise assistant capable of providing encouragement and customized feedback on body movement form over time. Repeated arm curls were observed and tracked using single and dual-camera systems using the Posenet pose estimation library. To accumulate enough experience across individuals, the reinforcement learning model was collaboratively trained by subjects. The proposed system is tested on 36 subjects. Behavioral changes are apparent in 31 of the 36 subjects, with 31 subjects reducing movement errors over time and 15 subjects completely eliminating the errors. The system was analyzed for which types of feedback provided the highest expected value, and feedback directly related to the previous mistake provided the highest valued feedback ( p\<0.0133 ). The result showed that the Reinforcement Learning system provides meaningful feedback and positively impacts behavior progress.

}, keywords = {Distributed Machine Learning, Human-Computer Interaction, Pose Estimation, Reinforcement Learning}, isbn = {978-1-6654-1625-2}, doi = {10.1109/CIC52973.2021.00012}, url = {https://ieeexplore.ieee.org/abstract/document/9707166}, author = {Ranasinghe, Ishan and Yuan, Chengping and Dantu, Ram and Albert, Mark V.} } @inbook {91, title = {Event Detection Based on Call Detail Records}, booktitle = {Behavior Computing: Modeling, Analysis, Mining and Decision}, year = {2012}, pages = {305{\textendash}316}, publisher = {Springer London}, organization = {Springer London}, address = {London}, isbn = {978-1-4471-2969-1}, doi = {10.1007/978-1-4471-2969-1_19}, url = {http://dx.doi.org/10.1007/978-1-4471-2969-1_19}, author = {Zhang, Huiqi and Ram Dantu}, editor = {Cao, Longbing and Yu, Philip} } @article {226, title = {Security Issues in VoIP Telecommunication Networks}, journal = {Handbook on Securing Cyber-Physical Critical Infrastructure: Foundations and Challenges}, year = {2012}, pages = {763{\textendash}789}, abstract = {As VoIP telecommunication networks are becoming popular, more and more VoIP calls are being made to accomplish security critical activities, e.g., E911 services, phone banking. However, the security ramifications of using VoIP have not been fully recognized, and there exists a substantial gap in the understanding of the potential impact of VoIP exploits on the VoIP users. In this chapter, we describe the components and functionalities of non-P2P and P2P VoIP networks and discuss the potential attacks to them such as MITM, spoofing, wiretapping, pharming, etc. We also illustrate a mechanism of using small world network to improve call performance of a P2P VoIP system and evaluate it over the currently deployed OpenVoIP system.}, keywords = {P2P, Security, session initiation protocol, small world networks, telecommunications, voice over IP}, isbn = {978-0-12-415815-3}, doi = {https://doi.org/10.1016/B978-0-12-415815-3.00030-3}, url = {https://www.sciencedirect.com/science/article/pii/B9780124158153000303}, author = {Yang, Xiaohui and Ram Dantu and Wijesekera, Duminda} } @inbook {93, title = {Smart Phone: Predicting the Next Call}, booktitle = {Behavior Computing: Modeling, Analysis, Mining and Decision}, year = {2012}, pages = {317{\textendash}325}, publisher = {Springer London}, organization = {Springer London}, address = {London}, abstract = {

Prediction of incoming calls can be useful in many applications such as social networks, (personal, business) calendar and avoiding voice spam. Predicting incoming calls using just the context is a challenging task. We believe that this is a new area of research in context-aware ambient intelligence. In this paper, we propose a call prediction scheme and investigate prediction based on callers{\textquoteright} behavior and history. We present Holt-Winters method to predict calls from frequent and periodic callers. The Holt-Winters method shows high accuracy. Prediction and efficient scheduling of calls can improve the security, productivity and ultimately the quality of life.

}, isbn = {978-1-4471-2969-1}, doi = {10.1007/978-1-4471-2969-1_20}, url = {http://dx.doi.org/10.1007/978-1-4471-2969-1_20}, author = {Zhang, Huiqi and Ram Dantu}, editor = {Cao, Longbing and Yu, Philip} } @conference {68, title = {Efficiency of Social Connection-based Routing in P2P VoIP Networks}, booktitle = {Proceedings of the 2Nd International Conference on COMmunication Systems and NETworks}, year = {2010}, publisher = {IEEE Press}, organization = {IEEE Press}, address = {Piscataway, NJ, USA}, keywords = {P2P routing, P2P VoIP systems, Social networks, social-network based routing}, isbn = {978-1-4244-5487-7}, url = {http://dl.acm.org/citation.cfm?id=1831443.1831488}, author = {Chandrasekaran, Vikram and Ram Dantu and Gupta, Neeraj and Yang, Xiaohui and Wijesekera, Duminda} } @inbook {77, title = {Small World VoIP}, booktitle = {Mobile Computing, Applications, and Services: Second International ICST Conference, MobiCASE 2010, Santa Clara, CA, USA, October 25-28, 2010, Revised Selected Papers}, year = {2010}, pages = {137{\textendash}155}, publisher = {Springer Berlin Heidelberg}, organization = {Springer Berlin Heidelberg}, address = {Berlin, Heidelberg}, abstract = {

We present the analysis and design of a Small World VoIP system (SW-VoIP) which is geared towards customers that are communicating with their Small World of social contacts. We use the term Small World to refer to the Peer-to-Peer (P2P) network of a client and his contacts both incoming and outbound. We reconstruct the small world of a user by collecting calling patterns over a configurable period of time. We enable user mobility by using a stepwise social identity to an IP address binding propagation model. We propose an efficient algorithm to locate users by electing popular users and leveraging the users closeness. We also introduce a self-stabilized load balancing mechanism to optimize the system performance under heavy network traffic. We evaluate our SW-VoIP system performance by simulating the user{\textquoteright}s lookup process using real-world telephone logs. Our experimental results show that our SW-VoIP system offers a better performance in optimizing the required routing path and reducing the average lookup delay when compared to traditional, non small-world P2P VoIP systems.

}, keywords = {closeness, electing, mobility, optimize, Peer-to-peer, popular, small world, VoIP}, isbn = {978-3-642-29336-8}, doi = {10.1007/978-3-642-29336-8_8}, url = {http://dx.doi.org/10.1007/978-3-642-29336-8_8}, author = {Yang, Xiaohui and Stavrou, Angelos and Ram Dantu and Wijesekera, Duminda}, editor = {Gris, Martin and Yang, Guang} } @conference {64, title = {Achieving Peer-to-peer Telecommunication Services Through Social Hashing}, booktitle = {Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference}, year = {2009}, publisher = {IEEE Press}, organization = {IEEE Press}, address = {Piscataway, NJ, USA}, abstract = {

Although peer-to-peer (P2P) Internet Telephony gains more and more market share, supporting traditional telephony related use cases is an indispensable requirement. However, communication services designed for this purpose are usually traditional circuit-based, and the centralized structure makes it nearly impossible for their deployments in a distributed, unsecure telecommunication environment. This paper proposes an approach for achieving various kinds of communication services on P2P voice over IP (VoIP) systems by building trust and executing supervision through social networks. We present a system architecture design for network topology maintenance and security assurance. Social protocols and social computing are used to study how P2P entities can be efficiently mapped to social networks, and how social functionalities can benefit communication services implementation. To demonstrate the approach feasibility, we exemplify this architecture in P2P VoIP emergency services by using gossiping and membership management techniques. We believe that our proposed approach will be able to support diverse services on P2P VoIP systems with the performance and security guaranteed to compete with centralized telecommunication systems.

}, isbn = {978-1-4244-2308-8}, url = {http://dl.acm.org/citation.cfm?id=1700527.1700582}, author = {Yang, Xiaohui and Ram Dantu and Wijesekera, Duminda} } @article {285, title = {Method and system for providing wireless-specific services for a wireless access network}, year = {2009}, month = {12/2009}, publisher = {Cisco Technology Inc}, chapter = {US7639647B2}, address = {US}, abstract = {

A method and system for providing wireless-specific services for a wireless access network includes receiving at a call agent of a wireless access network a call origination for a mobile device. Whether the device is registered on the wireless access network is determined. If the mobile device is not registered, whether the mobile device is active is determined at a mobility control function (MCF). If the mobile device is active, the call is connected to the mobile device with a call agent based on a temporary line directory number (TLDN) assigned by the MCF and passed to the call agent in an extended session initiation protocol (SIP) message.

}, keywords = {agent, call, mcf, mobile, network}, url = {https://patents.google.com/patent/US7639647/en}, author = {Ram Dantu and Chiang, Shihlung and Yin, Haochih and Kachhla, Rasik} } @conference {76, title = {A society-integrated testbed architecture for peer-to-peer telecommunications}, booktitle = {Testbeds and Research Infrastructures for the Development of Networks Communities and Workshops, 2009. TridentCom 2009. 5th International Conference on}, year = {2009}, month = {April}, abstract = {

Exploiting and deploying telecommunication services on Internet Telephony are imperative for a large market share. However, the distributed nature of peer-to-peer (P2P) network makes services implementation very difficult. In order to meet the research goals of achieving P2P telecommunication services through the union of social and computer networks, we present a society-integrated testbed architecture for P2P voice over IP (VoIP). By introducing an architecture that exploits and entailing social structure based connection establishment, the testbed presents an organic integration of social functionalities with good portability. The testbed also serves as a flexible tool suite that can be used to run experiments and obtain timely feedback based on the performance measurements.

}, keywords = {Computer architecture, computer network, computer networks, Computer science, Feedback, file organisation, Internet telephony, network traffic, P2P voice-over-IP, Peer to peer computing, peer-to-peer computing, peer-to-peer telecommunication service, portable social DHT function, Routing protocols, Social network services, society-integrated testbed architecture, software architecture, Telecommunication services, telecommunication traffic, Testing}, doi = {10.1109/TRIDENTCOM.2009.4976215}, author = {Yang, Xiaohui and Ram Dantu and Wijesekera, Duminda} } @inbook {46, title = {Behavioral Entropy of a Cellular Phone User}, booktitle = {Social Computing, Behavioral Modeling, and Prediction}, year = {2008}, pages = {160{\textendash}167}, publisher = {Springer US}, organization = {Springer US}, address = {Boston, MA}, abstract = {

The increase of advanced service offered by cellular networks draws lots of interest from researchers to study the networks and phone user behavior. With the evolution of Voice over IP, cellular phone usage is expected to increase exponentially. In this paper, we analyze the behavior of cellular phone users and identify behavior signatures based on their calling patterns. We quantify and infer the relationship of a person{\textquoteright}s randomness levels using information entropy based on the location of the user, time of the call, inter-connected time, and duration of the call. We use real-life call logs of 94 mobile phone users collected at MIT by the Reality Mining Project group for a period of nine months. We are able to capture the user{\textquoteright}s calling behavior on various parameters and interesting relationship between randomness levels in individual{\textquoteright}s life and calling pattern using correlation coeffi- cients and factor analysis. This study extends our understanding of cellular phone user behavior and characterizes cellular phone users in forms of randomness level.

}, isbn = {978-0-387-77672-9}, doi = {10.1007/978-0-387-77672-9_18}, url = {http://dx.doi.org/10.1007/978-0-387-77672-9_18}, author = {Phithakkitnukoon, Santi and Husna, Husain and Ram Dantu}, editor = {Liu, Huan and Salerno, John J. and Young, Michael J.} } @article {291, title = {Method and system for providing supplementary services for a wireless access network}, year = {2008}, month = {10/2008}, publisher = {Cisco Technology Inc}, chapter = {US7444151B2}, address = {US}, abstract = {

A method and system for providing supplementary services for a wireless access network includes downloading supplementary service triggers from a call agent to a mobility control function (MCF) for a wireless access network. Wireless-specific signaling of the wireless access network is communicated to the MCF. The MCF detects events associated with a trigger based on the wireless-specific signaling. The call agent is informed of the events by the MCF through session initiating protocol (SIP) extensions.

}, keywords = {agent, call, mcf, network, wireless}, url = {https://patents.google.com/patent/US7444151/en}, author = {Ram Dantu and Chiang, Shihlung and Yin, Haochih and Kachhla, Rasik} } @article {289, title = {Method and system of control signaling for a wireless access network}, year = {2008}, month = {12/2008}, publisher = {Cisco Technology Inc}, address = {US}, abstract = {

A method and system of control signaling for a wireless access network includes receiving from a wireless access network a signaling message for a mobile device. The signaling message is in a wireless-specific format. The signaling message is converted to a native format of a call agent to generate a call agent message. The call agent message comprises wireless-specific information of the signaling message.

}, keywords = {agent, call, mcf, message, network}, issn = {US7471674B2}, url = {https://patents.google.com/patent/US7471674/en}, author = {Ram Dantu and Chiang, Shihlung and Yin, Haochih and Kachhla, Rasik} } @conference {19, title = {Dynamic Control of Worm Propagation}, booktitle = {Proceedings of the International Conference on Information Technology: Coding and Computing (ITCC{\textquoteright}04) Volume 2 - Volume 2}, year = {2004}, publisher = {IEEE Computer Society}, organization = {IEEE Computer Society}, address = {Washington, DC, USA}, isbn = {0-7695-2108-8}, url = {http://dl.acm.org/citation.cfm?id=977403.978411}, author = {Ram Dantu and Cangussu, Jo{\~a}o and Yelimeli, Arun} } @article {6, title = {Forwarding and Control Element Separation (ForCES) Framework}, year = {2004}, month = {04/2004}, publisher = {RFC Editor}, issn = {2070-1721}, author = {Yang, L and Ram Dantu and Anderson, Todd and Gopal, Ram} }