Refereed, The 14th International Symposium on Architectural Interchanges in Asia, Research on Appearance Elements and Impression Evaluation in Apparel Stores: Exploratory Research Targeting Shop–in–Shops, Shiho Takeuchi; Jaeyoung Heo, Sep. 2024, International conference proceedings

Refereed, The 14th International Symposium on Architectural Interchanges in Asia, Study of Lighting Method Considering Residents' Circadian Rhythms, JINGRU SHEN; Jaeyoung HEO; Youko Inoue, Sep. 2024, International conference proceedings

Refereed, The 14th International Symposium on Architectural Interchanges in Asia, A Study on Appropriate Lighting Methods Considering Seasonal Psychological Changes: For young people, Minami Hagio; Jaeyoung Heo, Sep. 2024, International conference proceedings

Refereed, The 14th International Symposium on Architectural Interchanges in Asia, A study on the effects of background music on intellectual work - Examination by psychological and physiological assessment-, Mami Kondo; Jaeyoung Heo, Sep. 2024, International conference proceedings

Refereed, The 14th International Symposium on Architectural Interchanges in Asia, Research on the Effectiveness of Landscape Evaluation Using Virtual Reality Technology: Comparison of Field Experiment and VR Experiment, Kana Nagayama; Jaeyoung Heo, Sep. 2024, International conference proceedings

Refereed, The 15th Asia Lighting Conference, The Influence of Exterior Elements on Overall Store Impression in Apparel Stores, Shiho Takeuchi; Jaeyoung Heo, Aug. 2024, International conference proceedings

Refereed, The 15th Asia Lighting Conference, Study of Lighting Method Considering Residents’ Circadian Rhythms (Part2) -Age Group Comparison of Impressions of Lighting and Heart Rate in the Morning and Evening -, Jingru Shen; Jaeyoung Heo; Youko Inoue, Aug. 2024, International conference proceedings

Refereed, The 15th Asia Lighting Conference, Age Group Comparison on the Influence of the Rate of Change in Illumination and Color Temperature on the Discomfort rate of the Lighting Environment, Yurine Minaoka; Jaeyoung Heo; Youko Inoue; Ayano Nakamura, Aug. 2024, International conference proceedings

Refereed, The 15th Asia Lighting Conference, Evaluation Shopping Street and Commercial Facility Landscapes Using VR : The Influence of Visual and Auditory Elements on Perception, Mami Kondo; Jaeyoung Heo, Aug. 2024, International conference proceedings

Refereed, The 15th Asia Lighting Conference, Study of Visual Environment Evaluation Using HMD and 360-degree Videos : Comparison of Field Experiment and VR Experiment and Effectiveness of Landscape Evaluation Using VR, Kana Nagayama; Jaeyoung Heo; Youko Inoue, Aug. 2024, International conference proceedings

Refereed, Proc. of The 30th Quadrennial Session of the CIE, IMPACT OF DAYLIGHT CHANGES ON PSYCHOLOGICAL AND PHYSIOLOGICAL ASPECTS OF RESIDENTS IN AN APARTMENT BUILDING, E. Murayama; J. Heo; H. Kubo; S. Yoshida, Sep. 2023, International conference proceedings

Refereed, Proc. of 52nd International Congress and Exposition on Noise Control Engineering, Study on effects of the sound factors and their association on psychological evaluation of thermal comforts, Ikami Satomi; Shinji Yoshida; Jaeyoung Heo, Aug. 2023, International conference proceedings

Refereed, The 14th Asia Lighting Conference, The Appropriate Lighting Techniques Considering Daily Activities in Working Environment, Ayano Nakamura; Jaeyoung Heo; Youko Inoue, Aug. 2023, International conference proceedings

Refereed, The 14th Asia Lighting Conference, The Effects of Daylight Changes in Apartment Building on Psychophysiological Aspects of Residents, Emi Murayama; Jaeyoung Heo; Hiroko Kubo; Shinji Yoshida, Aug. 2023, International conference proceedings

Refereed, The 14th Asia Lighting Conference, STUDY OF LIGHTING METHOD CONSIDERING YOUNG RESIDENTS' CIRCADIAN RHYTHMS, Jingru Shen; Jaeyoung Heo; Youko Inoue, Aug. 2023, International conference proceedings

Refereed, The 14th Asia Lighting Conference, Research on Appropriate Lighting Methods that Take into account the Psychological Changes due to the Seasons, Minami Hagio; Jeayoung Heo; Youko Inoue, Aug. 2023, International conference proceedings

Refereed, 22ND INTERNATIONAL CONGRESS OF AESTHETICS, Aesthetic Evaluation of the Atmosphere in Suburban Environments, Mao Matsuyama; Jaeyoung Heo; Megumi Kawamura, Jul. 2023, International conference proceedings

Refereed, International Symposium on Temporal Design 2023, Investigating the Effectiveness of Guide Signs in Indoor Wayfinding using Space Syntax Theory and VR, Kana Nagayama; Kei Suzuki; Jaeyoung Heo, Jul. 2023, International conference proceedings

Refereed, International Symposium on Temporal Design 2023, Examining the Impact of Different BGM Genres and Tempo on Intellectual Work at Home, Mami Kondo; Risa Suzuki; Jaeyoung Heo, Jul. 2023, International conference proceedings

Refereed, The 13th International Symposium on Architectural Interchanges in Asia, Lighting Installation Methods Focusing on Nighttime Visibility in Residences, Emi Murayama; Takafumi Shimizu; Jaeyoung Heo, Dec. 2022, International conference proceedings

Refereed, Energies, MDPI AG, Investigation of the Visual Environment of Railway Station Stairs Using Qualitative and Quantitative Evaluation Methods, Jaeyoung Heo; Miki Kozaki; Takaaki Koga; Kotaroh Hirate; Hyun Bae Kim, A qualitative evaluation was performed by comprehensively considering the lighting environment of each staircase of 20 railway stations in Tokyo, the width of the stairs, the type of ceiling, wall lighting fixtures, and the color. As a result of the quantitative evaluation of 20 stairs, it was found that a difference of up to 400 lx occurred in the measurement results of the entrance, exit, and middle landing, even for the same stairs. As a result of qualitative evaluation, it was found that the quantitative evaluation result and the simple proportional relationship were not established. It was found that simply physically brightening a space cannot make a comfortable and safe space, and in some cases, glare is likely to occur. As a result of the analysis of variance and correlation analysis, it was found that the characteristics of the space, especially the material of the wall and the location of the lighting equipment, had a large effect on the impression of the space. As a result of simulation analysis, it was found that the performance varied greatly depending on the installation location of the lighting. In particular, the method of installing the line light source close to the ground was effective. In designing stair lighting for public facilities in the future, it is considered that qualitative factors such as the finishing of walls and ceilings, installation positions, and angles of lighting fixtures, which are environmental components other than lighting, should also be considered., Sep. 2022, 15, 19, 7013, 7013, Scientific journal, 10.3390/en15197013

Refereed, Displays, Elsevier BV, Lighting techniques considering the safety and comfort of the elderly in the railway station space, Jaeyoung Heo; Miki Kozaki; Takaaki Koga; Kotaroh Hirate; Hyun Bae Kim, Sep. 2022, 74, 102292, 102292, Scientific journal, 10.1016/j.displa.2022.102292

Refereed, Applied Sciences, MDPI AG, A Study on the Comparison of Impressions of Tourist Information Signs Focusing on the Differences between National Languages in Japanese Regional Cities, Kei Suzuki; Jaeyoung Heo, From the perspective of universal design, signs should be easy to understand for all users. In Japan, tourist information signs have become increasingly multilingual in recent years as the number of tourists from other countries has increased. However, it is not clear whether the current signs are comprehensible to both Japanese and non-Japanese speakers. In this study, field and questionnaire surveys on signs were conducted in Matsue City, a regional city in Japan, and the evaluations of Japanese and non-Japanese speakers were compared. In the field survey, a caption evaluation method was used to evaluate the visual environment, and in the questionnaire survey, the SD method was used to evaluate the signs obtained in the field survey. The results indicated that non-Japanese speakers were more likely to focus on signs, and signs with diagrams and maps were evaluated more positively. In addition, the evaluation structure of signs was found to consist of four elements: “Harmonicity”, “Clarity”, “Visibility”, and “Comprehensibility”. “Harmonicity” was indicated to be as important as “Clarity” and “Visibility”. These results suggest that the replacement of text with diagrams on signs contributes to the improvement of impressions and is particularly effective for non-Japanese speakers., Jan. 2022, 12, 3, 1499, 1499, Scientific journal, 10.3390/app12031499

Refereed, Urban housing sciences, A Study on the Change of Impression to Colored Light by Depressive Tendency, Kairu Inoue; Saeri Kaba; Jaeyoung Heo, Dec. 2021, 2021, 115, 81, 87, Scientific journal

Refereed, Proceedings of the Conference CIE 2021, International Commission on Illumination, CIE, CREATING A SENSE OF THE UNUSUAL WITH CHROMATIC LIGHT, K. Inoue; S. Kaba; J. Heo, Due to the influence of COVID-19, there is a need to create an environment where people can relax and feel special in a separated space. Therefore, in this study, we will clarify the psychological changes that occur when people are surrounded by an unusual environment.
This study prepared eight LED lighting colours: red, orange, yellow, green, blue, light blue, purple, and white. The room was illuminated, and the participants were asked to evaluate their impressions using the SD method on a 7-point scale.
As a result of impression evaluation, red gave a warm impression, yellow gave a bright impression, blue gave a cold impression, and purple gave a mature impression, just like the psychological effects of colours. Green gave an artificial impression that was different from the psychological effects of the other colours.
From these results, we can conclude that impressions do not correlate with colour symbolism when the entire room is illuminated with coloured light. In the future, we will clarify the relationship between wavelength and impression by studying the spectral distribution of each light source., Dec. 2021, International conference proceedings, 10.25039/x48.2021.po44

Refereed, Proceedings of the Conference CIE 2021, International Commission on Illumination, CIE, A STUDY ON THE DIFFERENCES IN VISION BETWEEN THE YOUNG AND THE ELDERLY IN SIGNS, M. Ishihara; K. Suzuki; J. Heo, It has been shown that with aging, cataracts become cloudy and colour perception and visual acuity deteriorate. As the world's population ages, there is a need for signage that considers older people's visual characteristics. This study aimed to clarify the effects of sign components on visual perception and identify differences in the effects of age. We conducted a psychological evaluation using the semantic differential method on 20 young and 10 elderly. The results showed that the younger participants gave higher ratings to many questions than the older participants. The factor analysis results showed that the items of the questionnaire consisted of a "visibility factor" and "harmony factor". The elderly were more likely to be affected by the viewing distance than the young invisibility., Dec. 2021, International conference proceedings, 10.25039/x48.2021.op58

Refereed, Proceedings of the Conference CIE 2021, International Commission on Illumination, CIE, THE EFFECT OF LIGHTING ENVIRONMENT ON FACIAL EXPRESSION PERCEPTION IN VIDEO TELECONFERENCING, K. Suzuki; Y. Takeuchi; J. Heo, In this study, we investigated whether manipulating the lighting environment in videoconferencing changes the readability of facial expressions. In the experiment, the participants were asked to evaluate their impressions of a video that simulated the situation in a videoconference. A total of 12 lighting conditions were used, including three colour temperature conditions and four lighting directions conditions. As a result of the factor analysis, four factors were identified: "Clarity," "Dynamism," "Naturalness," and "Healthiness." The results of ANOVA showed that placing the lighting in front was effective for all factors. And in all of the factors, it showed that lighting from the front was effective for the participants. In addition, while lower colour temperature decreased clarity, it improved naturalness and healthiness and was particularly effective when the lighting was placed in front of the subject., Dec. 2021, International conference proceedings, 10.25039/x48.2021.op51

Refereed, Applied Sciences, MDPI AG, Comprehensive Evaluation of the Visual Environment of a Railroad Station’s Platform, Focused on the User’s Psychology, Jaeyoung Heo; Miki Kozaki; Takaaki Koga; Kotaroh Hirate; Hyun Bae Kim, Through a comprehensive evaluation of the spaces of 25 railway stations, where power-saving operations are being conducted due to an earthquake, the effects of various components of the space on users’ psychology were reviewed. For the platforms of railway stations, which are divided into ‘island platforms’ and ‘side platforms’ the ‘physical quantity measurement’ and ‘impression evaluation’ were assessed. When a simple power-saving method, such as partial lighting up is adopted, it has been shown that there is a negative effect on the users, both physically and psychologically. In particular, in the case of outdoor platforms, there is a concern that glare and anxiety due to contrast may increase; therefore, it is necessary to utilize the reflective surfaces effectively. Floor illuminance is fundamental to lighting design. However, some areas cannot be evaluated by floor illuminance alone. The difference in the results of the impression evaluation in five areas with floor illuminance around 50 lx was widely distributed, and it was found that the shape and material of the space affected the results. If platform screen doors are installed, a lighting method that can evenly illuminate the interior of the space is necessary. By reviewing each factor that determines the visual impression, it was revealed that the lighting location and lighting method were significantly affected., Jul. 2021, 11, 14, 6566, 6566, Scientific journal, 10.3390/app11146566

Refereed, Building and Environment, Elsevier BV, Applicability of phase change material according to climate zones as defined in ASHRAE standard 169-2013, Hyun Bae Kim; Masayuki Mae; Youngjin Choi; Jaeyoung Heo, Jun. 2021, 196, 107771, 107771, Scientific journal, 10.1016/j.buildenv.2021.107771

Refereed, Solar Energy, Elsevier BV, Evaluation of shape-stabilization phase change material sheets to improve the heating load reduction based on the indoor application method, Hyun Bae Kim; Masayuki Mae; Youngjin Choi; Jaeyoung Heo, May 2021, 220, 1006, 1015, Scientific journal, 10.1016/j.solener.2021.03.059

Refereed, Journal of Environmental Engineering (Transactions of AIJ), Architectural Institute of Japan, A STUDY USING VR ON THE EASE OF FINDING SIGNS IN STATION SPACE, Marina NISHIKAWA; Ye MA; Jaeyoung HEO; Kotaroh HIRATE; Yoshiki IKEDA; Kazuo ISHIMA, Aug. 2020, 85, 774, 569, 577, Scientific journal, 10.3130/aije.85.569

Refereed, Journal of Environmental Engineering (Transactions of AIJ), Architectural Institute of Japan, EFFECTS OF THE DIRECTION JUDGMENT OF THE USER BASED ON THE ARROW OF SIGN AT THE STATION, Yusuke NISHIJIMA; Yoshiki IKEDA; Marina NISHIKAWA; Jaeyoung HEO; Kotaroh HIRATE, May 2019, 84, 759, 479, 486, Scientific journal, 10.3130/aije.84.479

Refereed, PROCEEDINGS OF CIE 2018 TOPICAL CONFERENCE ON SMART LIGHTING, International Commission on Illumination, CIE, A STUDY ON THE STAIR ILLUMINATION METHOD CONSIDERING THE ELDERLY, Jaeyoung Heo; Yoko Uchida; Kyungsun Chung; Miki Kozaki; Takaaki Koga; Kotaroh Hirate, May 2018, International conference proceedings, 10.25039/x45.2018.pp10

Refereed, Proceedings of the 8th Lux Pacifica, A Study on the Effects of LED Lighting on Railway Station on User's Psychology, Jaeyoung Heo; Miki Kozaki; Kotaroh Hirate, Mar. 2018, 6, 9, International conference proceedings

Refereed, Journal of Environmental Engineering (Transactions of AIJ), Architectural Institute of Japan, A STUDY ON APPLICABILITY OF HANDRAIL LIGHTING IN STAIRS SPACE OF RAILWAY STATION, Jaeyoung HEO; Yoko UCHIDA; Kyungsun CHUNG; Miki KOZAKI; Takaaki KOGA; Kotaroh HIRATE,  The first purpose of this study is to clarify the influence of light environment on user's evaluations of stairs such as visibility and easiness of moving up and down. By measuring illuminance, brightness, and subjective evaluations of stairs of stations, it shows that illuminance and brightness of the lower view angle influence greatly on subjective evaluations. Taking that result, we conclude that lighting set in handrails of stair can illuminate most efficiently.
 The second purpose is to clarify the influence of variation of lighting height. Intended for elderly people and young people, we conducted an experiment. As a result, variation of height of handrail lighting does not influence on subjective evaluations greatly. However, the evaluations in the environment of handrail lighting tend to be higher than that of ceiling lighting. In addition, it shows that elderly people can feel security in the environment of handrail lighting., Feb. 2018, 83, 744, 119, 127, Scientific journal, 10.3130/aije.83.119

Refereed, AIJ Journal of Technology and Design, Architectural Institute of Japan, TECHNOLOGICAL DEVELOPMENT PROCESS OF GLOBE LIGHTING EQUIPMENT FOR PLATFORM OF A TRAIN STATION, Miki KOZAKI; Kaori OGUNI; Youko UCHIDA; Jaeyoung HEO; Takaaki KOGA; Kotaroh HIRATE; Naoyuki SUZUKI, Jun. 2017, 23, 54, 525, 530, Scientific journal, 10.3130/aijt.23.525

Refereed, Urban Housing Sciences, A basic study on a proposed lighting system of the outside corridor for light pollution prevention of collective housing, Kyungsun Chung, Jaeyoung Heo, Kotaroh Hirate, Aug. 2016, 2016, 95, 83, 87, Scientific journal

Refereed, Journal of the Korean society of living environmental system, Suitable speech announcements on subway platforms for the elderly, J. Y. Jeon; H. S. Jang; J. Heo, Aug. 2013, 20, 4, 506, 513, Scientific journal

11 Sep. 2024, 11 Sep. 2024 - 12 Sep. 2024

04 Sep. 2024, 04 Sep. 2024 - 06 Sep. 2024

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27 May 2023, 26 May 2023 - 28 May 2023

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21 Sep. 2022, 21 Sep. 2022 - 22 Sep. 2022

Jun. 2022, 25 Jun. 2022 - 26 Jun. 2022

28 May 2022, 28 May 2022 - 29 May 2022

Jaeyoung Heo, CNU International Seminar on Advanced Building Technology, Research on the relationship between guide signs and spatial recognition using VR, Feb. 2022

Maha Ishihara; Kei Suzuki; Jaeyoung Heo, A Study on Signs Considering the Visual Characteristics of the Elderly, Sep. 2021

Kei Suzuki; Heo Jaeyoung, Study on the relation between clearness of route and tourist information signs focusing on smoothness of movement：Investigation of signs installation location by comparing Japanese tourists and foreign tourists, Sep. 2021

Kairu Inoue; Jaeyoung Heo, A study on the psychological impressions given by nighttime lighting, Sep. 2021

Jaeyoung Heo, Convergence Studies on Building Science in the Metaverse age, Visual environment evaluation method using VR, Aug. 2021

Jun. 2021, 26 Jun. 2021 - 27 Jun. 2021

Jun. 2021, 26 Jun. 2021 - 27 Jun. 2021

Jaeyoung Heo, Research on regional revitalization focusing on the light and visual environment, 28 Nov. 2020, 28 Nov. 2020 - 28 Nov. 2020

Jaeyoung Heo, SAKURA Exchange Program in Science workshop, A Study on Architectural Light and Visual environment, 20 Dec. 2019

CIE 2018 TOPICAL CONFERENCE ON SMART LIGHTING, A Study on the Stair Illumination Method Considering the Elderly, May 2018

8th Lux Pacifica, A Study on the Effects of LED Lighting on Railway Station on User's Psychology, Mar. 2018

H. S. Jang; J. Heo; J. Y. Jeon, The Korean Society for Noise and Vibration Engineering. Autumn conference and Exhibition on Noise and Vibration, Investigation of indicating signal in public spaces for perception of older persons, Oct. 2011

S. Y. Yoo; J. Heo, Floor impact sound and vibration in a scale model with box-frame type structure, Apr. 2011

J. Heo; J. You; J; Y. Jeon, The Korean Society for Noise and Vibration Engineering. Autumn conference and Exhibition on Noise and Vibration, Investigation of masking effect of water sounds on road traffic noise using semantic differential method, Oct. 2010

H. S. Jang; J. Heo; J. Y. Jeon, A study for acoustical characteristics of audible sound during urban sound scape evaluation, Oct. 2010

J. Heo; E. Kim; J. You; J; Y. Jeon, The Acoustical Society of Korea, Proceedings of the Acoustical Society of Korea Conference, Acoustical investigation of different dimensional factors using computer simulation in rectangular concert halls, Jun. 2010

J. Heo; J. You; J; Y. Jeon, The Korean Society for Noise and Vibration Engineering. Spring conference and Exhibition on Noise and Vibration, Evaluation of acoustical characteristics of water sounds for soundscape enhancement in open public spaces, Apr. 2010