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제목 Smart buildings that predict your group activities: new technology can revolutionize indoor conditions
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작성일 2020.02.19 15:39:53 조회수 38
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prof. 도시건축학부 김태완 교수님

Smart buildings that predict your group activities: new technology can revolutionize indoor conditions

 

Researchers at Incheon National University develop a framework for automatically detecting groups of people and recognizing group activities indoors. This could allow automatic building management systems to adjust building conditions to maximize the occupants’ satisfaction and save energy, aside from providing useful data to building managers about space usage.

 

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Detecting groups of people and recognizing different group activities indoors automatically is very challenging, but it could bring about many benefits to both building users and building managers. Photo courtesy: Shutterstock

 

Given that we spend over half of our lives indoors, enabling building management systems to automatically identify the activities of occupants can be beneficial for ensuring the best possible indoor environment while also maximizing energy savings. Although the field of human activity recognition has greatly advanced in the past decades thanks to progress in portable electronics, sensors, and artificial intelligence, most research has focused on identifying the activities of individuals instead of tackling the more complex problem of recognizing group activities.

 

In buildings where group activities are commonplace, detecting groups of people performing activities together and identifying their individual roles would allow us to automatically adjust conditions, such as lightning and temperature, and provide building managers with valuable data about space usage. However, group activity recognition is challenging; groups have to be correctly detected, and the system has to keep up with real-time variations in group size, interactions among members, and variations in the actions performed by each person.

 

To address this issue, researchers from Incheon National University recently developed a framework, called GADAR (Group Activity Detection And Recognition) that relies on sensor data from occupants’ smartphones and can accurately detect and identify group activities. This study is published in Building and Environment. The framework was designed to handle all the above-mentioned challenges. By reading sensor data from smartphones (accelerometer information, speech volume levels, and location, based on distance to Bluetooth beacons placed beforehand), a prototype implementation of GADAR could accurately identify and classify group activities in an educational building, such as attending class, group discussions, and seminars. “The GADAR framework achieved more than 89% accuracy in both group detection and group activity recognition,” states Prof. Tae Wan Kim, who led the research.

 

The results of this study could help guide the development of GAR systems for a variety of buildings and group activities to expand the possible applications. “GADAR could enable building management systems to be aware of diverse occupant activities without human intervention and control indoor environments to maximize occupant satisfaction,” concludes Prof. Kim. Such systems could also prove useful for automatically managing groups of people during emergency situations. Considering how attractive such premises are, researchers will have to keep developing and improving GAR systems so that smart buildings become a reality.

 

 

Reference

Authors:

Hao Chena, Seung Hyun Chab and Tae Wan Kima*

Title of original paper:

A framework for group activity detection and recognition using smartphone sensors and beacons

Journal:

Building and Environment

DOI:

https://doi.org/10.1016/j.buildenv.2019.05.016

Affiliations:

1Division of Architecture and Urban Design, Incheon National University  

2Department of Interior Architecture Design, Hanyang University  

 

*Corresponding author’s email: taewkim@inu.ac.kr

 

 

About Incheon National University

Incheon National University (INU) is a comprehensive, student-focused university. It was founded in 1979 and given university status in 1988. One of the largest universities in South Korea, it houses nearly 14,000 students and 500 faculty members. In 2010, INU merged with Incheon City College to expand capacity and open more curricula. With its commitment to academic excellence and an unrelenting devotion to innovative research, INU offers its students real-world internship experiences. INU not only focuses on studying and learning but also strives to provide a supportive environment for students to follow their passion, grow, and, as their slogan says, be INspired.

 

Website: /mbshome/mbs/inuengl/index.html

 

About the author

Tae Wan Kim is an assistant professor at the Division of Architecture and Urban Design, Incheon National University. He received his PhD degree in the Department of Civil and Environmental Engineering from Stanford University. He is interested in evaluating/forecasting the project, organization, and product performance using virtual design and construction and enlightening behavior of humans in construction process and product use.

 

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