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Sanghyun Cheon
Department of Urban Planning and Design, Hong-ik University, Seoul, Republic of Korea

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Journal article
Published: 30 November 2020 in Journal of Korea Planning Association
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ACS Style

Jung-A Kim; Sanghyun Cheon. Detecting Urban Development Patterns in North Korea Using Satellite Night Time Light Data. Journal of Korea Planning Association 2020, 55, 99 -109.

AMA Style

Jung-A Kim, Sanghyun Cheon. Detecting Urban Development Patterns in North Korea Using Satellite Night Time Light Data. Journal of Korea Planning Association. 2020; 55 (6):99-109.

Chicago/Turabian Style

Jung-A Kim; Sanghyun Cheon. 2020. "Detecting Urban Development Patterns in North Korea Using Satellite Night Time Light Data." Journal of Korea Planning Association 55, no. 6: 99-109.

Journal article
Published: 15 September 2020 in Landscape and Urban Planning
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Light pollution in urban locations is a complex, serious problem, but researchers have paid more attention to light pollution on natural, non-urban environments. Understanding the sources of artificial light radiance intensity is the first step in minimizing damage from light pollution in urban areas. The purpose of this study is to quantitatively examine the relationship between light pollution and urban built environments. We developed databases for a series of urban–built environment data with composite Visible Infrared Imaging Radiometer Suite day-night band (VIIRS-DNB) data from the Earth Observation Group of the United States National Oceanic Atmospheric Administration’s National Geophysical Data Center to apply regression models (production functions) with grid cells at a spatial resolution of 15 arc seconds. Based on the results, we identified urban-development and land-use characteristics and built-environment factors that caused high levels of light emissions in a city. First, high levels of light emissions are associated with urban spatial-development patterns, such as roads, office buildings, commercial facilities, higher proportions of “station influence areas,” and urban-development intensity. Second, more seriously, the infiltration of commercial facilities into urban residential areas makes them brighter and increases the risk of exposure to light pollution. Therefore, the development of commercial areas and commercial facilities that emit light should be properly managed, especially for areas mixed with residential land use. Third, our quantitative model with intra-city-level analyses can estimate a high level of the baseline light-emission propensity in Seoul, which indicates that a city’s light-emission intensity can be highly associated with its sociocultural and institutional characteristics for lighting and light uses.

ACS Style

Sanghyun Cheon; Jung-A Kim. Quantifying the influence of urban sources on night light emissions. Landscape and Urban Planning 2020, 204, 103936 .

AMA Style

Sanghyun Cheon, Jung-A Kim. Quantifying the influence of urban sources on night light emissions. Landscape and Urban Planning. 2020; 204 ():103936.

Chicago/Turabian Style

Sanghyun Cheon; Jung-A Kim. 2020. "Quantifying the influence of urban sources on night light emissions." Landscape and Urban Planning 204, no. : 103936.

Journal article
Published: 16 June 2019 in Sustainability
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The overall purpose of this study was to investigate psycho-physiological variations in human bodies by observing visual images of daytime and nighttime scenery to focus on restorative and recovery effects. Unlike previous studies that have focused on the natural versus built environments, this study aims to compare restorative and recovery potentials between daytime and nighttime. The experiment was conducted by showing a total of 12 images to 60 participants in order to measure the brain response with an electroencephalogram (EEG). As measures of the psychological impact of the images, perceived restorative and recovery scales were used. The self-reported data indicates that daytime sceneries are rated more positively than nighttime sceneries in terms of restorative and recovery effects. According to the EEG results, restorative and recovery feelings have negative relationships with the relative theta band, while positive relationships are shown with the relative alpha band. The correlation analysis between EEG bands and brain regions showed a significant correlation (p < 0.05) with 46 pairs for the daytime scenery stimuli and 52 pairs for the nighttime scenery stimuli. Through the results of the study, we conclude that daytime and nighttime scenery affect restorative feelings and the human brain response through both verbal and non-verbal methods.

ACS Style

Sanghyun Cheon; Soyoung Han; Mintai Kim; Yoonku Kwon. Comparison between Daytime and Nighttime Scenery Focusing on Restorative and Recovery Effect. Sustainability 2019, 11, 3326 .

AMA Style

Sanghyun Cheon, Soyoung Han, Mintai Kim, Yoonku Kwon. Comparison between Daytime and Nighttime Scenery Focusing on Restorative and Recovery Effect. Sustainability. 2019; 11 (12):3326.

Chicago/Turabian Style

Sanghyun Cheon; Soyoung Han; Mintai Kim; Yoonku Kwon. 2019. "Comparison between Daytime and Nighttime Scenery Focusing on Restorative and Recovery Effect." Sustainability 11, no. 12: 3326.

Journal article
Published: 04 January 2019 in Sustainability
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As the necessity for safety and aesthetic of nightscape have arisen, the importance of nightscapes (i.e., nighttime landscape) planning has garnered the attention of mainstream consciousness. Therefore, this study was to suggest the guideline for nightscape planning using electroencephalography (EEG) technology and survey for recognizing the characteristics of a nightscape. Furthermore, we verified the electroencephalography (EEG) method as a tool for landscape evaluation. Therefore, this study analyzed the change of relative alpha wave and relative beta wave and perceived fear of participants depending on twelve nightscape settings (four types of settings: Built nightscape images group with an adult; Built nightscape images groups without an adult; Nature-dominant nightscape images with an adult; and Nature-dominant nightscape images without an adult). Our findings indicate that the most fearful nightscape setting was recorded in Built nightscape images groups without an adult figure in perceived fear result depending on four types of nightscape settings. In Nature-dominant nightscape images, on the other hand, the nightscape setting with an adult figure was more fearful than the setting without an adult. The interaction effect between landscape type (built and nature-dominant) and adult presence towards perceived fear was verified and it showed that the image with adult affects landscape type. For electroencephalography (EEG) results, several brain activities in the relative alpha and beta wave showed significant differences depending on nightscape settings, which situates electroencephalography (EEG) as an invaluable tool for evaluating landscapes. Based on our physiological electroencephalography (EEG) experiment, we provide a new analytic view of the nightscape. The approach we utilized enables a deeper understanding of emotional perception and fear among human subjects by identifying the physical environment which impacts how they experience nightscapes.

ACS Style

Mintai Kim; Sanghyun Cheon; Youngeun Kang. Use of Electroencephalography (EEG) for the Analysis of Emotional Perception and Fear to Nightscapes. Sustainability 2019, 11, 233 .

AMA Style

Mintai Kim, Sanghyun Cheon, Youngeun Kang. Use of Electroencephalography (EEG) for the Analysis of Emotional Perception and Fear to Nightscapes. Sustainability. 2019; 11 (1):233.

Chicago/Turabian Style

Mintai Kim; Sanghyun Cheon; Youngeun Kang. 2019. "Use of Electroencephalography (EEG) for the Analysis of Emotional Perception and Fear to Nightscapes." Sustainability 11, no. 1: 233.

Journal article
Published: 24 August 2017 in Production and Operations Management
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Container seaports play an important role in cross-border logistics as firms increasingly expand their global footprint in sourcing, manufacturing and distribution. Besides convenience of access to hinterland regions, a key metric for a port's attractiveness is its processing time, that is, its ability to clear goods within a consistent, predictable time frame. Due to differences in infrastructure, government regulations, and operating procedures, ports may exhibit different degrees of predictability in processing times: some are more predictable while others are more ambiguous. We study how ambiguity in processing times affects a port's attractiveness under various circumstances. We find that even if a port maintains a consistent expected processing time, increased ambiguity can still affect its attractiveness to firms, although not always negatively. The effect of ambiguity depends on its nature, whether the shipments are time-sensitive, attitudes toward ambiguity, and trade terms surrounding shipments.

ACS Style

Sanghyun Cheon; Chung‐Yee Lee; Yimin Wang. Processing Time Ambiguity and Port Competitiveness. Production and Operations Management 2017, 26, 2187 -2206.

AMA Style

Sanghyun Cheon, Chung‐Yee Lee, Yimin Wang. Processing Time Ambiguity and Port Competitiveness. Production and Operations Management. 2017; 26 (12):2187-2206.

Chicago/Turabian Style

Sanghyun Cheon; Chung‐Yee Lee; Yimin Wang. 2017. "Processing Time Ambiguity and Port Competitiveness." Production and Operations Management 26, no. 12: 2187-2206.

Journal article
Published: 31 March 2016 in Sustainable Development
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ACS Style

Sanghyun Cheon. The Economic-Social Performance Relationships of Ports: Roles of Stakeholders and Organizational Tension. Sustainable Development 2016, 25, 50 -62.

AMA Style

Sanghyun Cheon. The Economic-Social Performance Relationships of Ports: Roles of Stakeholders and Organizational Tension. Sustainable Development. 2016; 25 (1):50-62.

Chicago/Turabian Style

Sanghyun Cheon. 2016. "The Economic-Social Performance Relationships of Ports: Roles of Stakeholders and Organizational Tension." Sustainable Development 25, no. 1: 50-62.