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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
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.
Byungkuk Lee,Seungchul Yang,Dongyong Kwak,Hyunkwang Jo,Youngwoo Lee,Youngmoon Bae,Jayhyung Lee Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.6
The existing wet reconversion processes for the recovery of scraps generated in manufacturing of nuclear fuel are complex and require several unit operation steps. In this study, it is attempted to simplify the recovery process of high-quality fuel-grade UO<sub>2</sub> powder. A novel wet reconversion process for uranyl nitrate hexahydrate solution is suggested by using a newly developed pulsed fluidized bed reactor, and the resultant chemical characteristics are evaluated for the intermediate ammonium uranate hydrate product and subsequently converted UO<sub>2</sub> powder, as well as the compliance with nuclear fuel specifications and advantages over existing wet processes. The UO<sub>2</sub> powder obtained by the suggested process improved fuel pellet properties compared to those derived from the existing wet conversion processes. Powder performance tests revealed that the produced UO<sub>2</sub> powder satisfies all specifications required for fuel pellets, including the sintered density, increase in re-sintered density, and grain size. Therefore, the processes described herein can aid realizing a simplified manufacturing process for nuclear-grade UO<sub>2</sub> powders that can be used for nuclear power generation.