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이중정,이충원,우병욱 대한보건협회 2003 대한보건연구 Vol.29 No.2
The purpose of the study was to see how prevalent the risk behaviors of korean university students using Youth Risk Behavior Surveillance System(YRBSS) developed by the Centers for Disease Control and Prevention(CDC). Translation and modification for Korean students of the YRBS were carried out March 2000 and the modified YRBS were administered to students of 4-year college in Daegu metropolitan city. The number of students used at final analysis was 619(male : 212(freshmen: 101, senior students : 111) female : 407(freshmen : 146, senior students : 261)) Over 50% of university students rarely or never used safety belt and there were no significant difference between freshmen and .senior students. 363 of students had ridden a bicycle during 12 months preceeding the survey. Of these students, almost student(male : 99%, female : 100%) were rarely or never wore a bicycle helmet. During the 12 months preceding the survey, 22.8% male freshmen had felt so sad or hopeless almost every day for 22weeks in a row that they stopped doing some usually activities and there were no significant difference between freshmen and senior students. Male student in grades 2. 3 and 4(89%) were significantly more likely than freshmen(42%) to have ever tried cigarette smoking. Almost male students had had >1 drinks of alcohol during their lifetime(lifetime alcohol use) and almost male freshmen(%%) and senior student(%%) had 2 1 drinks of alcohol on 2 1 of the 30 days preceding the survey(current alcohol use). These results suggest that some risk behaviors be very prevalent in a korean university students and priority health-risk behaviors, which contribute to the leading cause of mortality and morbidity among youth and adult, often are establish during college age, extend into adulthood, are interrelated.
Multi-Dimensional Local Limit Theorems for Large Deviations
So, Beong-Soo,Jeon, Jong-Woo,Kim, Woo-Chul The Korean Statistical Society 1984 Journal of the Korean Statistical Society Vol.13 No.1
In analogy to the theorem proved by So and Jeon (1982), we give a multi-dimensional version of local limit theorem for large deviations in the continuous case. We also prove a similar theorem in the case of lattice random vectors. Some examples are given.
( Beong Ou Lim ),( Seung Jae Lee ),( Eun Kyung Kim ),( Pyo Jam Park ),( Sang Ho Moon ),( Dong Kug Choi ),( Jin Woo Hwang ),( Hyun Kang ),( Chan Gil Kim ),( Byung Tae Jeon ) 한국응용생명화학회(구 한국농화학회) 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.1
Antioxidative activities of various enzymatic extracts from Inonotus obliquus were evaluated by measuring 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydroxyl, and alkyl radical-scavenging activities using electron spin resonance spectrometer. The mushrooms were enzymatically hydrolyzed by seven carbohydrases (Viscozyme, Celluclast, Dextrozyme, AMG, Promozyme, Maltogenase, and Termamyl) and eight proteases (α-chymotrypsin, Alcalase, Flavourzyme, Neutrase, papain, pepsin, Protamex, and trypsin). Celluclast and Protamex extracts showed the highest DPPH radical-scavenging activities, and IC50 values were 0.155 and 0.151 mg/mL, respectively. All enzymatic extracts of I. obliquus had scavenging potencies to hydroxyl radical, and IC50 value of the pepsin extract with the highest activity was 0.847 mg/mL. Maltogenase and trypsin extracts showed the highest scavenging activities on alkyl radical, and IC50 values were 0.082 and 0.094 mg/mL, respectively. The pepsin extracts showed protective effect on H2O2-induced DNA damage. In addition, the pepsin extracts decreased generation of reactive oxygen species and cell death in PC-12 cells against H2O2-induced oxidative damage. The findings of the present study suggest that the enzymatic extracts of I. obliquus have antioxidative activity against oxidative stress on PC-12 cells.
A Local Limit Theorem for Large Deviations
So, Beong-Soo,Jeon, Jong-Woo The Korean Statistical Society 1982 Journal of the Korean Statistical Society Vol.11 No.2
A local limit theorem for large deviations for the i.i.d. random variables was given by Richter (1957), who used the saddle point method of complex variables to prove it. In this paper we give an alternative form of local limit theorem for large deviations for the i.i.d. random variables which is essentially equivalent to that of Richter. We prove the theorem by more direct and heuristic method under a rather simple condition on the moment generating function (m.g.f.). The theorem is proved without assuming that $E(X_i)=0$.
일방향응고 Ni 기초내열합금의 천이액상확산 접합에 관한 연구
김우열,강정윤,정병호,박화순 대한금속재료학회(대한금속학회) 1994 대한금속·재료학회지 Vol.32 No.11
metallugical studies on the bonded interlayer of directionally solidified Ni base superalloy MM-007 joints were carried out during transient liquid phase diffusion bonding(TLP bonding). The formation mechanism cf solid during solidification process in TLP bonding was also investigated. Microstructures of the bonded interlayer of joints made at 1423K for 3.84ks were charaterized by insert metals. In the case of Ni-Si-B alloy, MBF-30, coarse γ′phases were produced in the bonded interlayer. In the case of Ni-Cr-B alloy, MBF-80, coarse γ′ pases were not produced and fine γ′ phases were produced in the bonded interlayer. In the isothermal solidification process, solids grew epitaxially from mating base metal inward the liquid insert metal ;and grain boundaries were formed at intersections of growing solid. It is clarified that directionally solidified alloy can be bonded ideally without. detriment to hardening mecahnism of base metal. Formation of fine grains in the bonded interlayer is due to epitaxial growth from recrystallized grains which formed by machining. In the result of tensile test at 1033K, all joints were fractured at base metal. TLP bonding process can obtain exellent joints.
황병권 ( Beong Kwon Hwang ),제정인 ( Jung In Je ),김상범 ( Sang Bum Kim ),박순태 ( Soon Tae Park ),하우송 ( Woo Song Ha ),최상경 ( Sang Kyung Choi ),홍순찬 ( Soon Chan Hong ),한호성 ( Ho Seong Han ) 대한외상학회 1990 大韓外傷學會誌 Vol.3 No.2
We analysed 24 cases of snake bite who were managed at the GNUH from Mar. 1987 to Dec. 1990. The results were as follows; The sex ratio of male to female was 1 : 2 and peak age was 4th decade. August was the most prevalent season of snake bite. The most common predilection site in body was the foot (29.1 %). The time interval from the onset of snake bite to the time when patients arrived for the first aid treatment were 4 hours and 24 hours in 11 cases(45.8%)., The duration of tourniquet application was 2 and 5 hours in 2 cases(8.3%), but in the rest of cases(91.6%) we did not apply tourniquet. The most frequent general symptoms and signs were dyspnea (45.8%) and headache (45.8%) Most common local symptoms and signs were pain (83.3%) and swelling (83.3%). The severe complications were 2 cases of ARF and 1 case of hepatic subcapsular hematoma rupture due to DIC, but there was no case of death.