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자동차차체 및 부품제조업 산업장의 작업환경실태에 관한 조사 연구
서준호,문덕환,김정호,이채관,황용식,손병철,김대환,이창희,김휘동,이채언 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.5
Objectives: For the purpose of preparing the fundamental data and control the working environment and assessing the status of working environmental in manufacturing industry of bodies for motor car and of parts. Methods and Materials: Accessories for motor car and its engines the auther measured the noise level, concentration of dust, heavymetals, organic solvents, chemicals to 99 industries(24 working processes) form Feb. 2000 to Oec. 2000. Results: The results were as follows : 1. Mean noise level cutting, grinding, pressing, foundries and shot-blast was exceeded to threshold limit value(TLV) of noise. 2. Mean concentration of total dust was not exceeded to TLV. 3. Mean concentration of Mn in welding process and Pb in drying, welding, fabricating, rolling was exceeded to TLV. 4. Mean concentration for chemicals and organic solvents were not exceeded to TLV. 5. Mean concentration of dust and heavymetals were statistical significant difference between with local ventilation system and without local ventilation system. Conclusion: Above results, author suggest to prepare more passively control to working environment where exceeded the TLV.
야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로
조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6
Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.
플루옥세틴 캅셀제의 지원자에 대한 생체이용율 및 대사율 비교
강원구,박용순,조규행,최준식,권광일 충남대학교 약학대학 의약품개발연구소 1998 藥學論文集 Vol.14 No.-
Fluoxetine is a nontricyclic antidepressant which blocks serotonin reuptake selectively. Its N-demethyl metabolite, norfluoxetine is also selective inhibitor of serotonin uptake. This study was carried out to compare the bioavailability of Myung-in fluoxetine (20 ㎎/cap with that of Prozac?. The bioavailability was conducted on 24 healthy volunteers who received a single dose (80 ㎎) of each drug in the fasting state, in a randomized balanced 2-way crossover design. After dosing, serial blood samples were collected for a period of 48 hours. plasma was analyzed for fluoxetine and norfluoxetine by a sensitive and validated HPLC assay. The major pharmacokinetic parameters (AUC_0-48hr, Cmax, Tmax. AUC_inf.. MRT. T_1/2. Vd and Cl) were clculated from the plasma fluoxetine concentration-time data of each volunteer. The microcomputer program. "WinNonlin' was used for compartmental analysis. A two-compartment model with first-order inpot, first-order output and no lag time was chosen as the most appropriate phamacokinetic model. The data were best described by using a weighting factor of 1/y^2. Though the plasma fluoxetine concentrations of Myung-in fluoxetine were higher than those of Prozac® at all observed time from 7.9% to 16.9% (P<0.05 at 6, 7 and 10 hr), the bioavailability of Myung-in fluoxetine appeared to be bioequivalent with that of Prozac®. There were no statistical significant differences between the two drugs in al pharmacokinetic parameters including AUC_0-48hr of norfluoxetine.
마이크로 채널 내 T 형 혼합부 형상에 따른 2상 유동 양식 변화에 대한 기초 연구
이관근(Kwan Geun Lee),이준경(Jun Kyoung Lee),박태현(Tae Hyun Park),윤창식(Chang Sik Yoon),방영준(Young Jun Bang),신환준(Hwan Jun Shin) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
The effect of inlet mixer geometries on the two-phase flow patterns in square micro-channel with 600 × 600 ㎛ is investigated in this paper. The inlet configurations based on the T-junction with three different branch 400, 600 and 1200 ㎛ in width were used. The test fluids were nitrogen and water. The superficial velocities cover a broad range of 0.01 - 10 m/s for liquid superficial velocity and 0.1 - 100 m/s for gas superficial velocity. Several distinctive flow patterns, namely, annular flow, wavy flow, slug-annular flow, slug flow, slug-bubbly flow, bubbly flow, churn flow are identified, and their special features are described. It has been confirmed that two phase flow patterns are sensitive to the inlet geometries.
Liver Histology in Asymptomatic Hepatitis B patients with High Viral Load
( Jun Yong Park ),( Young Nyun Park ),( Young Joon Yoon ),( Do Young Kim ),( Yong Han Paik ),( Byung Soo Moon ),( Kwan Sik Lee ),( Kwang Hyub Han ),( Chae Yoon Chon ),( Sang Hoon Ahn ) 대한간학회 2007 Clinical and Molecular Hepatology(대한간학회지) Vol.13 No.3(S)
Thixotropic behavior of clay colloid enhance green density of ceramic body
( Kwan Sik Park ),( Sang Suck Kim ),( Byung Sei Jun ) 경남대학교 신소재연구소 2012 신소재연구 Vol.24 No.-
Traditionally, ceramic products have been created using raw materials that require high firing temperature and energy intensive processing. The fast increase of ceramic tille production in the world has lead to a fast decrease of the available raw materials and energy sources, and also generate huge amount of the waste tils. These may also contain harmful materials as the heavy metal elements that can contaminate the soil. Therefore alternative ways to reuse of these kinds of waste materials have been studied for reducing environmental issues. The present work aims at developing a new process for fabricating extra large scaled tiles with uniform packing density using rheology of colloidal suspension. To prepare the vibrated casting slurries, colloids of the waste tiles were added as a binder materials, and a thixotropic agent to avoid segregation between large and fine grains. The plasticity of the slurries may be governed by the rheology of colloids of the waste tile. To give thixotropic behavior, the dispersion and coagulation behavior of the colloidal suspension of will be investigated by zeta potentiometer. The blending of discrete sized to achieve a high packing density is essential in formulating batches, which may cause a little dimensional change during sintering. To get the maximum green density, four different particle sizes were mixed as the case of refractories. To give thixotropic behavior, the dispersion and coagulation behavior of the colloidal suspension were investigated by the zeta potentiometer. The point of zero charge of the suspension was shown sear pH 5 and maximum zeta potential was -55[mV] near pH 11. Maximum agglomerate particles were appeared near to the point of zero charge. The bending strength and water absorption of sintered bodies were more than 8.35kgf/cm2, and less than 5.0% above 1100℃ respectively. In addition, crystalline phase of sintered bodies were quarts and mullite. The micro-structure of the sintered body has a uniform pore size and distribution.