Gi-Hyoug Cho

Ulsan National Institute of Science and Technology | UNIST · School of Urban and Environmental Engineering

Travel behavior researchers have dominantly explored the influence of increase in development densities with mixed pattern of land-uses, and investment in infrastructures related to public transit toward more sustainable-transportation policies. However, little has been known about the long-term interdependencies between people’s decisions on trave...

Shared housing, which provides an individual, private room for each tenant and common spaces for all housemates, is an emerging housing option for young adults in many countries. This study explored housing perceptions and preferences and assessed young adults' willingness to pay for shared housing based on Maslow's hierarchy of human needs and Mea...

Young adults often face barriers in finding affordable housing due to their economic constraints and the fact that they are experiencing a distinct phase of the family life cycle. In response to this situation, there is a growing interest in shared housing as one of the solutions for housing difficulties of young single households in Korea. In spit...

This longitudinal study described park usage and assessed the contribution of parks to moderate to vigorous physical activity (MVPA) among adolescent girls. High school girls from California (n = 131) and Minnesota (n = 134) wore a global positioning system (GPS) monitor and accelerometer for 6 consecutive days at two time points, one year apart. P...

While a mixture of residential and non-residential uses in urban development has advantages in reducing transportation energy consumption and improving efficiency of land utilization, the patterns of energy consumption in mixed-use buildings are largely unknown. To understand associations between the built environment and energy consumption and to...

This paper investigated the temporal and spatial variability of the urban heat island (UHI) effect by geographical location in the study area of Ulsan, Korea. It focuses on the relationship between geometric features and geographical locations. For this research, air temperature measurements were collected from 44 monitoring stations in 2016. We cl...

A nature park in an urban area, which generally includes environmentally valuable natural landscape such as forests, mountains, rivers, and beaches, provides valuable benefits for the public such as recreational opportunities and an aesthetic landscape. However, residents near nature parks could be more vulnerable to natural disasters like floods,...

Science Walden, which is inspired by two prominent literary works, namely, Walden by Henry David Thoreau (1817–1862) and Walden Two by Burrhus Frederic Skinner (1904–1990), is aimed at establishing a community that embodies humanistic values while embracing scientific advancement to produce renewable energy and water sources. This study attempts to...

This study applied the American Meteorological Society and Environmental Protection Agency Regulatory Model (AERMOD) to assess the risk caused by an accidental release and dispersion of the toxic chemical benzene in the vicinity of a highly populated urban area. The modeling domain encompasses the Korean megacity of Ulsan, which includes two nation...

This research examined how environmental attributes near intersections influence the perceived crash risk among school-aged children, which provides information on the potential risks of pedestrian crashes that can guide the development of proactive countermeasures. In a sample of 799 children aged 10-12 years old in Korea, the environmental attrib...

The rapid increase of impervious surfaces and the dense development that accompanies urban growth has reduced the amount of green space in urban landscapes and increased urban surface temperatures. Accordingly, the greening of urban spaces has been proposed as one approach to mitigating urban heat island (UHI) effects. To find the most practical gr...

The purpose of this study is to explore the housing tenure trajectories of post-REO properties, with a focus on their sales processes and neighborhood spillover effects over time. This study suggests that the renter occupancy of post-REO properties in minority communities could lead to continuing negative spillover effects. Between 2006 and 2013, R...

One essential piece of information used to estimate earthquake casualties is the spatiotemporal distribution of the population. HAZUS-MH is a loss-estimation model nested in a geographic information system that has been developed and freely distributed by the US Federal Emergency Management Agency to estimate loss and damage due to natural hazards....

Numerous studies have shown that dense, well-connected, and diverse environments are key features that promote walking. Accepting these finding as true, we hypothesized that decreasing marginal effects may occur in the associations between the built environments and walking. The purpose of this study was as follows: (1) to empirically test whether...

Understanding how the built environment at a neighborhood scale is associated with individuals’ walking has been a common research objective in public health and city planning. In contrast to the extant literature, we examine whether a neighborhood’s location defined at a regional scale is associated with walking and whether this association is sep...

This study investigates to what extent a mismatch between residential preferences and actual residential locations is associated with residents’ physical activity and walking. The residents of Montgomery County, MD, and Twin Cities, MN, were classified into four residential subgroups, and their walking and physical activity outcomes were compared....

In examining the association between environmental exposures and walking, conducting research on a neighbourhood scale has been the dominant approach whereas the association of the regional-scale environment with behaviours has rarely been explored. Because regional location and neighbourhood built environment attributes are likely to be correlated...

Background: Studies that have combined accelerometers and global positioning systems (GPS) to identify walking have done so in carefully controlled conditions. This study tested algorithms for identifying walking trips from accelerometer and GPS data in free-living conditions. The study also assessed the accuracy of the locations where walking occu...

Locational data, logged on portable GPS units and matched with accelerometer data, was used to examine associations of the built environment with physical activity and sedentary behaviors of adolescent females. In a sample of 293 adolescent females aged 15 to 18 years old in Minneapolis and San Diego, the built environment around each GPS point and...

Studies that have combined accelerometers and global positioning systems (GPS) to identify walking have done so in carefully controlled conditions. This study tested algorithms for identifying walking trips from accelerometer and GPS data in free-living conditions. The study also assessed the accuracy of the locations where walking occurred compare...

this study developed and tested algorithms to identify outdoor walking trips from portable global positioning system (GPS) units in free-living conditions. the study included a calibration and a validation phase. For the calibration phase, we determined the best algorithm from 35 person-days of data. Measures of agreement regarding the daily number...

Although researchers have explored associations between mixed-use development and physical activity, few have examined the influence of specific land uses. This study analyzes how the accessibility, intensity, and diversity of nonresidential land uses are related to walking for transportation. Multinomial logistic regression was used to investigate...

Evidence is growing that the built environment has the potential to influence walking--both positively and negatively. However, uncertainty remains on the best approaches to representing the pedestrian environment in order to discern associations between walking and the environment. Research into the relationship between environment and walking is...

While the conventional approach to safety planning has emphasized crash analysis with police-reported crash information, transportation professionals increasingly recognize the importance of proactively identifying potential crash risk and considering environmental characteristics. In a proactive approach, individuals' perception of crash risk prov...