NSF Research Grant Award received

August 15, 2017

Congratulations!!  Dr. Choi's research, titled "Human-Building Integration: Bio-Sensing Adaptive Environmental Control for Human Health and Sustainability", is awarded a National Science Foundation Research Grant Award in August 2017. The NSF program is the Environmental Sustainability in the Division of Chemical, Bioengineering, Environmental, and Transport System. The research will be sponsored for three years with $300,000. The research is very interdisciplinary. Multiple scholars/researchers will participate in the research as collaborators, including faculty in Electrical Engineering/Computer Science, and Psychology/Medicine, and also industry partners, such as Buro Happold Engineering, USGBC, and SIEMENS. 


  • Research Overview: Existing human-building interactive techniques related to environmental controls rely heavily on users’ occupancy data and system-centered approaches. However, user’s passive responses are still required, which can hinder the efficiency of system operations. The outcome of this project will lead to human-based systems controls that will utilize a user’s real time physiological responses as input variables in the control system loop. The proposed approach will be based on the principle of using the human body as an integrated sensory device that will allow the environmental control system to be much simpler, yet be more functionally robust, while minimizing the system’s faults and malfunctions. Therefore, the research outcome will enhance fundamental knowledge about and create a novel approach to the interpretation of physiological signals, as applied to building environmental controls. This will, in turn, fill the integrative research gap between building systems and human physiology in the engineering domain. The knowledge and technology to be generated from this proposed project will provide scalable, integrative, and transformative solutions for real-world issues (e.g., people’s wellbeing and environmental sustainability).

Invited Seminar at the Technical University of Denmark (DTU)

June 01, 2017

Dr. Choi was Invited to the International Center for Indoor Environmental and Energy (ICEEE)  by Professor Arsen Melikov at the Technical University of Denmark (DTU) in Copenhagen for a seminar in May 2017. The seminar focused on his adaptive thermal sensation model as a function of wrist skin temperatures, and it brought together researchers from across different building research domains who are working in diverse fields revolving indoor environmental quality and energy conservation, particularly thermal comfort.

Dr. Dongwoo Yeom, a post-doctoral scholar of the HBI group, received an assistant professorship offer from Lawrence Technical University in Michigan.

May 01, 2017

Dr. Dongwoo Yeom, a post-doctoral scholar of the HBI group, received an assistant professorship offer from Lawrence Technical University in Michigan.

Dr. Yeom is a researcher and architect with a strong interest in human building integration, indoor environment quality, building performance, and sustainable design. He received his B.S., M.S. and Ph.D. in Architecture at Ajou University, Korea in 2014, and he has been working as a postdoctoral researcher in the Human Building Integration Lab of Building Science at the University of Southern California since 2016. At Lawrence Tech, he will teach building system technologies for undergraduate and graduate as well as conduct his researches related to the human building integration and building performance.

Dr. Choi received a Best Paper Award at 2016 IAQVEC

October 26, 2016

Dr. Joon-Ho Choi (PI) and his collaborators, Prof. John Mutlow and Prof. Marc Schiler, have received the Best Paper Award at the 9th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings (IAQVEC). IAQVEC is a premier international conference series, held once every three years, and it covers a broad range of key research areas with the goal of simultaneously improving indoor environmental quality (IEQ) and energy efficiency enhancing wellbeing and sustainability. He presented one of his recent research, entitled “Comfort at Workstation: Comprehensive POE Research on Office Environment of Southern California” at the conference. The research identified and resolved technical issues of the current post-occupancy evaluation methodologies based on the use of 400 IEQ datasets collected from office environments within the university and commercial office buildings (such as Perkins+ Will, Buro Happold Engineering, etc.) located in Southern California. The research findings are expected to contribute to establishing architectural design strategies to maximize occupants’ environmental satisfaction within limited project resources.

Two Lab members received the first and second place awards in the Student Research Competition at a Science-Technology oriented conference in California.

February 28, 2016

Congratulations!  Two of the HBI Lab members won the First and Second Place awards in the Student Research Competition at the 26th Korean-American Scientists and Engineers Association Southwestern Regional Conference (KSEA-SWRC 2016) at California State University, Long Beach on February 20, 2016.


Jehyun Moon won First Place for his research thesis, “Extended POE research on Office Environment of Southern California.” Through strategic analysis of people’s physical and psychological reactions to building conditions (thermal, lighting, air, acoustics, etc.), Moon’s research examines the principles of human-building interaction in a building’s indoor environment. From this research, Moon has published two papers in prestigious national conferences.


Mohammed Aljammaz presented his research thesis, “Modern Solution Found in Traditional City” and received the Second Place award. Aljammaz investigated the applicability of daylighting tubes, which allow residential interiors to achieve maximum illuminance from daylighting, while also addressing issues of glare and privacy.

Dr. Choi received the 2014 New Investigator Award from the U.S. Architectural Research Centers Consoritum (ARCC)

March 07, 2015

Dr. Choi was selected as a receipient of the 2014-2015 ARCC New Inverstigator Award. 

One of Dr. Choi’s recent researches, entitled “Human-Building Integration for Assessment of Indoor Environmental Quality for Human Health and Environmental Sustainability: Pupil-Size Based Visual Environment Control in the Workplace” has technically innovative features as an emerging research topic in the domain of Building Science in Architecture. The goal of this research is to determine a diagnostic method for detecting improper ambient lighting conditions, a major contributing factor to visual stress and associated health problems in office workplace environments, and to establish a diagnostic lighting design tool in architecture.This experimental study provides unique knowledge concerning how an individual’s physiological signals can be translated to estimate his/her visual sensation and comfort level, as a function of pupil sizes, their fluctuations, and time frequencies. The result defines a new quantitative measure of the occupant’s visual satisfaction, and determines optimal lighting levels.

Semester-End Party

December 12, 2015

The Building Performance Research Group had a great semester-end party in a Korean pub, located in K-Town, Los Angeles.  Thank you for all the hard work!! 

Dr. Choi received a Best Paper Award at the 2012 Architecture Institute of Korea Conference.

April 30, 2013

Dr. Choi's research paper, titled "Potential Use of Human-Bio-Signals for Automatic Building Mechanical System Controls” was selected for the Best Paper Award at the Architecture Institute of Korea Conference, held in Seoul, Korea in November 2012. Congratulations!

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