Seungho Yang

York University · Department of Earth and Space Science and Engineering (Lassonde School of Engineering)

In the New Normal era of “Living with COVID-19”, we need a measure of the safety of street spaces. Social distancing during a pandemic is considered an effective safety measure, but the current binary threshold approach to social distancing is clearly inadequate for evaluating and monitoring the risk of infection on urban streets. This study is to...

The COVID-19 outbreak has fundamentally changed how people move around and live in a city. It is reported that the virus spreads through transmission via large droplets and/or small aerosols when an infected individual coughs or sneezes or even breathes or talks near an uninfected individual. This study considers the implications of physical distan...

25 Numerous studies have developed intersection crash prediction models to identify crash hotspots and 26 evaluate safety countermeasures. These studies largely considered only micro-level crash contributing 27 factors such as traffic volume, traffic signals, etc. Some recent studies, however, have attempted to include 28 macro-level crash contribu...

This study introduces a traffic flow theory-based reliability indicator to evaluate the inter-city public transit service. The two-fluid theory parameter n that measures the road networks’ resilience to changing traffic is used as a new reliability indicator of public bus service. We compared the performance of the new indicator with the three exis...

The concept of social mix is perceived as an attempt to minimize social exclusion by enhancing individual social capital. Related policies have been implemented in many countries to prevent isolation of certain groups and achieve social integration. However, few studies have examined their impacts on various income groups. This study uses data from...

Estrogens originated from humans can reach ambient water and possibly cause significant ecological risks. In this study, the quantities of human-origin estrone (E1) and 17β-estradiol (E2) in the influent and effluent of four sewer treatment plants (STPs) in Seoul, South Korea were estimated using a demographic model. A Monte Carlo simulation was us...

The purpose of this study was to analyze the relationship between people’s actual walking experience and their social capital levels in order to examine the possibility of restoring weakened social functions of streets and public spaces in a walking-friendly urban environment. Based on the survey data of 591 residents of Seoul, we empirically analy...