Involved projects

Human-centered home network, 2005.6 -                                                         Georgia Tech, GA

Networking is playing an increasingly important role in the lives of many of us. And yet, most academic and industrial research on networking has focused solely on technical metrics such as performance and scalability.  However, there are the human challenges of networking technology: how do we design networking technology so that it is usable, understandable, and maintainable by ordinary people? We, the human-centered home networking research team at the PIXI lab has a deep interest and competency in addressing the challenges of human-centered networking. As a part of a family of projects for human-centered home networking at the PIXI lab, I am working on:

 

Interconnected homes Designed an interconnected homes: post-telephone era solution that provides home users with rich communication means based on natural and user-friendly interaction mechanisms, without requiring detailed knowledge about their home networks  Prototype UI

 

ICEbox++ An interactive human-centered home network management system that utilized direct manipulation and user interface metaphros in home newtork management for home users with little technial knoweldge.  

 

 

ICEbox Developed the ICEbox that helps home users to do network and device configuration for connection to the secure wireless network, without worring about the technical manual configuration; utilized a pointing-based user interfaction model and physical lock for device provision Presentation

 

  

 

* Jeonghwa Yang and W. Keith Edwards, ICEbox: Toward Easy-to-Use Home Networking, INTERACT2007, September 2007. Paper

 

* Jeonghwa Yang and W. Keith Edwards, ICEbox:  Bring! Point! Get Configured!, ACM CHI’06 IT@Home Workshop, April 2006.   Paper

 

 

 

Activity recognition system, Summer Internship, 2006         Intel Research, Santa Clara, CA

     

Developed an activity recognition system that detects digital media and web activities such as watch movie, listen to Internet radio, read online newspapers, etc., in a networked digital home.

 

 

 

* Jeonghwa Yang, Bill N. Schilit, and David W. McDonald, Activity Recognition for the Digital Home, IEEE Computer Magazine, April 2008.

 

*Jeonghwa Yang, David McDonald, and William N. Shilit, Digital Media and Web Activity Recognition in Digital Home, Intel Research Technical Report, 2006.

 

 

 

Universal remote controller revisited, Fall 2005                                            Georgia Tech, GA

Redesigned a universal remote controller interface for home AV appliances based on user requirements and usability criteria to make it easy for householders to operate it, and evaluated it with various evaluation techniques including heuristic evaluation, cognitive walk-through, think-aloud, and interviews.

 

                          Presentation

 

 

 

 

 

Message ferry project, 2003.8 – 2005.5                                                         Georgia Tech, GA

Worked on the message ferry system, an mobile ad hoc network for sparse MANETs in which special nodes, called ferries, deliver messages among disconnected mobile ad hoc nodes; designed a ferry replacement protocol for a fault tolerant message ferrying system; designed a multicast protocol to support group communication in sparse MANETs.

 

* Jeonghwa Yang, Yang Chen, Wenrui Zhao, Mostafa Ammar, and Ellen Zegura, Multicasting in Sparse MANETs Using Message Ferrying, IEEE Wireless and Communications and Networking Conference (WCNC), April 2006

 

* Jeonghwa Yang, Yang Chen, Mostafa Ammar, and Chungkee Lee, Ferry Replacement Protocols in Sparse MANET Message Ferrying Systems,  IEEE Wireless and Communications and Networking Conference (WCNC 2005) , New Orleanse, LA, March 2005.   Paper   Presentation

 

 

 

Reliable transport protocol, Fall 2002                                                           Georgia Tech, GA

Designed and implemented an RTP (mini-TCP) protocol that supports reliable connection-oriented byte-stream communication semantics over unreliable and dynamic datagram networks through a sliding-window with selective acknowledgments, checksum, a retransmission with dynamic timeout based on network situation, and a de-multiplex of up to 256 different ports.

 

 

 

Mobile collaboration system, 2001-2002                                                                   ETRI, Korea

Worked on a web-browser based mobile collaboration environment that enables mobile device (Compaq iPAQ Pocket PC H3600) users to collaborate with one another through chatting, shared whiteboard, co-browsing, and VoIP based on SIP; Chatting and shared whiteboard frames are plugged into a web browser; remote users share the same web site links and pen-markings on the browser through co-browsing; users can do voice chatting through VoIP based on SIP.

 

* Eunryung Lee, Jiyong Kim, Jeonghwa Yang, Yunhee Kim, and Doohyun Kim. MoCos:  Mobile Collaboration System using PDAs. In the Proc. of Korea Information Science Society, 28(2), 2001.

 

 

QoS-guaranteed adaptive multimedia streaming, 2001                                       ETRI, Korea

 

Worked on an adaptive multimedia streaming system that supports QoS-guaranteed streaming using the layered video encoding scheme; designed and implemented a rate controller that adjusts the QoS level based on feedbacks from clients

 

* Jeonghwa Yang, Doohyun Kim, Jeeyoung Kwak, and Sungho Ahn, QoS Adaptive Streaming Based on the Enhanced MPEG-2 Scaling, The 7th International Conference on Distributed Multimedia Systems, September 2001, pp.130-137.

 

 

 

 ATLAS: A scalable network framework for large scale multi-user virtual environments,  ICU

 

Worked on the ATLAS project, a network framework for 3D multi-user system that enables users to interact with other users and 3D objects in 3D worlds; defined and implemented framework components and their functionalities; researched on a consistency management and concurrency control scheme; applied the ATLAS to a 3D multi-user virtual shopping mall system and a collaborative engineering system. (Visit the ATLAS project homepage for more info)

 

* Dongman Lee, Jeonghwa Yang, and Soonju Hyun, Scalable Predictive Concurrency Control for Large Distributed Virtual Environments with Densely Populated Objects, Proceedings of the ACM Symposium on Virtual Reality Software and Technology (VRST), October 2000, pp.109-114.

 

* Jeonghwa Yang and Dongman Lee, Scalable Concurrency Control for Distributed Virtual Environments, IEEE Virtual Reality (VR), March 2000, pp. 151-158.

 

* Dongman Lee, Mingyu Lim, and Jeonghwa Yang, ATLAS: A scalable network framework for large distributed virtual environments, Korea Human Computer Interaction (HCI), January 2000.

 

 

 

 

 

Research interests 

Human-centered home networking , human-centered user interface & interaction design, usabilty engineering, user experience, personal/social impact of domestic IT technologies