食品 中 殘留農藥에 관한 硏究 : Monitoring Program for Pesticide Residues in Food

元敬豊,洪茂基,郭寅信,李熹德,朴建相,尹熙俓,文在辰,姜仁鎬 국립보건연구원 1994 국립보건원보 Vol.31 No.2

食品의 微生物 規格基準에 관한 硏究 (Ⅰ)

문조종,안장수,곽인신,박윤수,양화영,이한창,변광섭 국립보건연구원 1989 국립보건원보 Vol.26 No.

유전자 알고리즘을 이용한 최소 질량 진동계의 설계

곽문규 동국대학교 산업기술연구원 1997 산업기술논문집 Vol.10 No.-

본 논문에서 다룬 문제는 고유진동수를 정한 상태에서 구조물을 최소 중량계로 만드는 최적화 문제이다. 최적화문제를 위하여 유전자 알고리즘을 고려하였는데 유전자 알고리즘은 유전법칙의 적자생존 원리를 이용한 알고리즘이며 일반적인 최적화 기법과 비교하여 그 적응성이 뛰어나 본 논문에서 다룬 것과 같은 비선형 최적화 문제에 대해서도 쉽게 최적해를 구할 수 있다. 수치예로써 끝단에 질량이 매달려 있고 종진동을 하는 보에 대하여 정해진 고유치와 최소중량을 동시에 만족하는 해를 유전자 알고리즘을 이용하여 구하였다. 수치계산 결과 유전자 알고리즘이 이와 같은 문제의 해결에 적합함을 확인할 수 있었다. This paper is concerned with optimization problem for the minimum mass design of structures. A genetic algorithm is considered in this paper for that purpose. The genetic algorithm, which stems from the survival of fittest in natural world, has proved its effectiveness in general optimization problem, so that the optimal solution can be obtained easily for the nonlinear optimization problem addressed in this paper. As a numerical problem, a nonuniform bar with a tip mass is considered and the optimal mass distribution, which simultaneously satisfies the minimum mass and the specified natural frequencies, is determined by the genetic algorithm, It is found from the numerical example that the genetic algorithm is an adequate technique for the addressed optimization problem.

사슴의 행동과 heart rate에 관한 연구

곽완섭,이상무,전병태,문상호,김창원,김경훈,太田 實 건국대학교 자연과학연구소 1998 建國自然科學硏究誌 Vol.9 No.1

꽃사슴의 heart rate를 안정적이며 지속적으로 기록하기 위해 고안한 본 telemetry system, 특히 자체 제작하여 활용한 electrode 와 transmitter 의 부착 방법 등은 매우 유용한 방법임이 입증되었다. 개발된 방법으로 heart rate를 측정, 행동과의 관계를 검토한 바, 행동의 변화는 곧 heart rate 의 변동으로 이어지기 때문에 방목사슴의 행동추정에 heart rate 의 측정치가 유효한 지표가 될 수 있음이 입증되었다. 또한 꽃사슴은 1일중 standing 시간이 70%로 면양과 똑같은 비율이었으며, 채식시간이 매우 짧은(170분/일) 경향을 나타내었는데 이것은 집약적 사육 조건하에서 꽃사슴의 채식특성이 아닌가 생각된다. In order to make consistent and reliable records of heart rate of deer, the telemetry system was modified in electrode and in attaching transmitter. This method was highly effective. The heart rate measured by this modification had a high correlationship with the change of deer behavior. The heart rate was a good prediction index of deer behavior on the pasture. In addition, the standing time of sika deer was 70% of daily hours, which was similar to that of sheep. Also, the short eating time(17- min/day) was attributed to the unique eating characteristics of deer under the intensive feeding condition.

가스크로마토그래피를 이용한 산업장 공기중 혼합유기용제 농도의 동시정량분석에 의한 환경감시

이종태,문덕환,이헌,곽문석,김대환,배기택,이채언 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.2

Environmental monitoring by measuring the air concentration of solvent mixtures should be the most useful method in the exposure assessment. But the solvent mixtures in air can be difficult to measure. In order to improve the method for air measurements of solvents, the author developed a simultaneous determination method for mixtures of 23 solvents using gaschromatography. And also for the purpose of assessing occupational exposure to solvent mixtures, the author applied this method to measure the air concentrations of solvent mixtures in industrial setting. The best condition of this method was 35℃ -150℃ for column temperature, 250℃ for detector and injector temperature with capillary OV-1 column at 0.2kg/㎠ if inlet pressure. And The recovery rates were 90% and over for 16 organic solvents including toluene and 70% and less for 4 organic solvents including ethanol. In raw materials(adhesives, diluents) of 3 industrial settings(paint manufacturing industry, chemical products industry & fishing products industry), the major components was aromatic hydrocarbons (toluene, o-, m-, p-xylene), and the number of detected items among 23 solvents were 4-16. The Cn/Nn-value(2.02) at one unit of adhesives developing department in chemical products industry exceeded permissible exposure limit(1), and Cn/Nn-values demonstrated a remarkable range(Cn/Nn-values were 0.04-2.02 for charcoal tube and 0.02-0.68 for passive sampler).

육계분 발효사료의 첨가수준이 숫꽃사슴의 소화율, 건물채식량 및 질소출납에 미치는 영향

전병태,곽완섭,강성기,이상무,문상호 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.1

본 실험은 기존 사슴사료에 있어서 육계분 발효사료의 대체 가능성을 검토하기 위해 숫사슴에 있어서 육계분 발효사료의 첨가수준을 0, 15 및 30%로 달리하여 소화율, 증체량, 건물채식량 및 질소출납에 미치는 영향을 검토하였다. 모든 처리구에서 실험사슴들은 비슷한 수준의 채식량을 나타내어 건물기준으로 체중의 약 3% 정도의 채식량을 기록하고 있어 육계분 발효사료를 30%까지 첨가한 경우 숫사슴의 채식 기호도에는 부정적인 영향이 나타나지 않는 것으로 판단되었다. 건물소화율은 Control이 76.5%로 가장 높았고, T2가 70.3%로 가장 낮아 유의성(P<0.05)이 인정되었다. 조단백질의 경우도 Control구가 75.8%로 가장 높은 소화율을 나타내었으며, T2가 70.2%로 가장 낮은 소화율을 나타내어 처리간에 유의성(P<0.05)이 인정되었다. 조섬유 소화율은 Contol구 70.8%, T1구 62.7%, T2구 56.0%로 육계분 발효사료의 첨가수준이 높아짐에 따라 조섬유 소화율이 저하되어 Control구와의 사이에 유의성(P<0.05)이 인정되었다. 건물 및 가소화 건물섭취량 모두 육계분 발효사료의 첨가수준이 높아질수록 약간씩 저하되는 경향은 있었으나 그 차이에 대한 유의성은 인정되지 않았다. 실험사슴들의 일당 증체량은 T1구에서 가장 높았으며 Control구에서 가장 낮았으나 처리간의 차이는 유의성이 인정되지 않았다. 질소섭취량은 T1구가 40.2g으로 가장 많았으며 T2구가 38.0g으로 가장 낮았으나 처리간의 유의성은 인정되지 않았다. 분 중 질소의 양은 T2구에서 가장 높았으며 뇨 중 질소의 양은 Control구가 가장 높았다(P<0.05). 체내 질소 축적량은 T1구에서 가장 높았으나 나머지 처리구들과 비슷한 수준을 유지했다. To determine nutritive value and suitability of deep-stacked broiler litter for deer, influence of supplementary levels of broiler litter on digestibility, dry matter intake, and nitrogen balance was investigated in male spotted deer (Cervus nippon) fed a commercial mixed(complete) ration. The deep-stacked and ground broiler litter was supplemented at the level of 0%(Control). 15%(TI) and 30%(T2) on the basis of fresh matter to the mixed ration. All treatments had similar palatability at about 3% body weigh of dry matter intake. Dry matter digestibility was highest in Control and lowest in T2(P<0.05). Digestibility of crude protein was lowest(P<0.05) in T2. Dry matter and digestible dry matter intake was similar in all treatments. Daily body weight gain was not affected by treatments. Feeding 15 or 30% of broiler litter to male deer resulted in similar nitrogen intake. fecal nitrogen excretion and daily nitrogen retention(g/d), compared with feeding Control. These results suggest that up to 30% of broiler litter may be fed to male deer without deleterious effects on deer performance.

Conjugated Linoleic Acid(CLA) 급여가 돈육 품질에 미치는 효과

이정일,박준철,문홍길,주선태,박종대,김영화,박구부,최진성 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.5

Effects of dietary conjugated linoleic aicd on pork quality was investigated using sixty four pigs. CLA was synthesized by alkaline isomerization method with corn oil. Pigs were devided into 4 treatment groups(16 pigs/group) and subjected to one of four treatment diets(0, 0.1, 0.2, and 0.3% CLA diets; total fed diets) for 2 weeks before slaughter. Pork loin and belly were collected from the animals(105∼110㎏ body weight) slaughtering at the commercial slaughter house. Pork loin and belly meat were aerobic packaged and then stored during 2, 5, 8, 11 and 13 days at 4℃. Samples were analyzed for general compositions, physico-chemical characteristics(pH, purge loss, cooking loss) TBARS, fatty acid composition and CLA content. Crude protein of 0.3% CLA treatment was increased significantly than that of control(P$lt;0.05), but crude fat, crude ash and total moisture were no significant differences between the control and CLA diets groups. pH of control and CLA. treatments were increased as the storage period passed, but there were no significant differences between the control and CLA treatment groups. Purge and cooking loss were no significant differences between the control and CLA treatment groups, and there were not changed as the storage period passed. All CLA treatment groups showed lower TBARS value than the control, and the higher CLA content in feed. the TBARS level was decreased in loin and belly. As dietary CLA was increased in feed; the content of CLA was increased in loin and belly, but the control was almost not detected. The contents of CLA were not significantly changed during chilled storage for l3 days. In the change of fatty acid composition, the contents of oleic, linoleic and arachidonic in loin and belly were decreased by dietary CLA-supplementation, whereas the increase level of C(.A-supplementation resulted in the higher palmitic and stearic acid. In all results. dietery CLA-supplementation was not affected in general components and physico-chemical properties, and CLA could be accumulated in pork meat and its antioxidant capability has been indicated. It was suggested that dietary CLA-supplementation could be products of high quality pork.

Natural Vibration Characteristics of Cantilever Plate Partially Submerged into Water

Moon K. Kwak(곽문규),Dong-Ho Yang(양동호),Jae-Ha Lee(이재하) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.10

The Application of the Smoothed Particle Hydrodynamics Method to the Vibration Problem of Strings

Moon K. Kwak(곽문규),Ezdiani Talib 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.10

Dynamic Modeling of a Planar Flexible Two-Link System having Prescribed Relative Angular Motions and Experiments

Moon K. Kwak,Min-Seop Choi 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.춘계 No.-

In dealing with the dynamics of a flexible body, the rigid-body motions and elastic vibrations are analyzed separately. However, rigid-body motions cause vibrations, and elastic vibrations affect rigid-body motions, indicating the inherent coupling between rigid-body motions and elastic vibrations. The coupled equations of motion for a space flexible body were derived by means of Lagrange’s equations in terms of quasi-coordinates in the previous study. The resulting equations consist of zero-order nonlinear equations of motion which depict rigid-body motions and first-order time-varying linear equations of motion which depict perturbed rigid-body motions and elastic vibration. In this study, a flexible two-link system is considered and we assume that the main and sub flexible links are rotated by motors. In general, motors in real-world applications have gearbox inside so that elastic vibrations cannot affect the angular motions of the motors. Considering this fact, simplified equations of motion for a planar flexible two-link system along with the kinematical synthesis are proposed to simulate the elastic vibrations caused by the prescribed angular motions. In order to verify the theoretical result, a flexible two-link system consisting of a composite beam and an aluminum beam operated by the AC and RC servo motors was constructed. Experimental results show that the dynamic modeling approach and the kinematical synthesis proposed in this paper are effective.