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1
Development of Highway Safety Policies by Discriminating Freeway Curve Alignment Features

Soyoung Jung,Kai Wang,Cheol Oh,Jaenam Chang 대한토목학회 2018 KSCE Journal of Civil Engineering Vol.22 No.4
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In the Republic of Korea, severe crashes with injuries and fatalities have most frequently occurred in freeway sections withcombinations of horizontal and vertical curves. To address this issue related to geometric complexness, this study quantitativelyverified the adequacy of Korean highway safety policy and identified supplemental strategies required for the freeway sections withhorizontal and vertical curve combinations. Based on in-depth road geometric data, this study combined K-means clustering withbinomial logit regression to identify the effects of contributing factors on cluster-based crash severity levels. Resultantly, six clusterbasedcrash severity estimation models were produced. Single vehicle to roadside protective facility and multivehicle crash typeswere significant to decrease the likelihood of injury crashes for both full- and three cluster-based regression models. Compared withfull data model, driver’s age, action, crash occurrence time, and traffic management related factors were significantly identified inonly single cluster. The resultant findings show that multidirectional highway safety policies are further required for the currentKorean highway safety policy associated with curve alignment features. This study will assist in researchers and field practitioners’decision-making for future cost-effective highway safety policies provision related to freeway sections with geometric complexness.
2
Prevalence and Correlates of DSM-IV Mental Disorders in South Korean Adults: The Korean Epidemiologic Catchment Area Study 2011

MaengJe Cho,SuJeong Seong,JeeEun Park,InWon Chung,YoungMoon Lee,Ahn Bae,JoonHo Ahn,DongWoo Lee,JaeNam Bae,SeongJin Cho,JongIk Park,Jungwoo Son,SungMan Chang,BongJin Hahm,JunYoung Lee,JeeHoon Sohn,JinS 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.2
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  KCI
  
  스콜라
Objective-The aim of this study was to estimate the prevalence and correlates of mental disorders in Korean adults. Methods-Door to door household surveys were conducted with community residents aged 18–74 years from July 19, 2011, to November 16, 2011 (n=6,022, response rate 78.7%). The sample was drawn from 12 catchment areas using a multistage cluster method. Each subject was assessed using the Korean version of the World Health Organization Composite International Diagnostic Interview (CIDI) based on the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Results-Lifetime and 12-month prevalence estimates were as follows: alcohol use disorders, 13.4% and 4.4%, respectively; nicotine use disorders, 7.2% and 4.0%, respectively; anxiety disorders, 8.7% and 6.8%, respectively; and mood disorders, 7.5% and 3.6%, respectively. The prevalence rates of all types of DSM-IV mental disorders were 27.6% and 16.0%, respectively. Being female; young; divorced, separated, or widowed; and in a low-income group were associated with mood and anxiety disorders after adjustment for various demographic variables, whereas being male and young were associated with alcohol use disorders. Higher income was not correlated with alcohol use disorder as it had been in the 2001 survey. Conclusion-The rate of depressive disorders has increased since 2001 (the first national survey), whereas that of anxiety disorders has been relatively stable. The prevalence of nicotine and alcohol use disorders has decreased, and the male-to-female ratio of those with this diagnosis has also decreased.