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環境による快適性と研究者科学研究への影響の数学モデ
ルに関する研究

Author(s)李, 知恒

CitationIssue Date2022-03

TypeThesis or Dissertation

Text version

ETDURLhttp://hdl.handle.net/10119/17784

RightsDescription

Supervisor:KIM, Eunyoung, 先端科学技術研究科, 博士

Japan Advanced Institute of Science and Technology

Research on the mathematical model about the influence mechanism of indoor environment
on researchers’ comfort and productivity

LI Zhiheng

Graduate School of Advanced Science and Technology
Japan Advanced Institute of Science and Technology
March 2022
Dissertation Abstract
With the development of society, the core of modern work has gradually shifted from the manufacturing industry to
the knowledge-based departments in indoor office environments. In line with the foregoing, indoor environment quality
is an important indicator of the status of the indoor environment. It not only reflects the comfort level of the researchers
in the building but also affects their performance, particularly in research institutions. However, due to the inherent
correlation among various environmental comfort indexes, it is difficult to evaluate the influence of specific environment
physical parameters on researchers’ comfort and their research performances. Therefore, the main objective of this paper
is to develop a mathematical model that would determine the relationship between environment physical parameters andresearch performance.
This study was based on an experiment carried out at a controlled research office in a pharmaceutical researchcompany located in the northeast of China. The controlled research office was equipped with a radiant floor heating
system that supplied heat in winter. A total of 32 researchers were recruited and divided into four experiment groups. Eachexperiment group was required to conduct daily research activities under 12 different environment conditions. Data werecollected from physical environment measurements, subjective questionnaire surveys, and performance tests.
The results showed that changes in the thermal, visual, and acoustic environments had significant influences on theresearchers’ environmental perceptions and satisfactions. Moreover, the environment physical parameters exerted
significant impacts on the researchers’ response times in the performance tests and, consequently, had significant effects
on their research performance. For the influence weight of the items under environmental comforts, thermal comfort had
the highest weight, followed by visual comfort. Meanwhile, acoustic comfort had the least impact. In addition, there wasa positive correlation among the thermal, visual, and acoustic environments.
This paper also developed a mathematical model for evaluating the researchers’ performances based on the indoor
environment physical parameters. In order to establish the mathematical model, the improved environmental comfort
index was obtained by enhancing the three existing mathematical models. Based on a factor analysis of environment
comfort, the weight of each comfort index was obtained. Finally, through a nonlinear regression analysis between theperformance index and the indoor environment quality index, the relationship between research performance andenvironment physical parameters was obtained.
Keywords: Indoor environment quality, environmental comfort, environmental perception, environmental satisfaction
research performance