車體構造解析硏究

김지홍,김천욱,이신영 연세대학교 산업기술연구소 1988 논문집 Vol.20 No.1

An analysis on the load-bearing capacity of floor frame and body structure is investigated by the three dimensional rigid frame analysis. The load-bearing capacity of the body structure is estimated on the basis of comparison to the floor-frame-only structure. The location and magnitude of the maximum displacement are also determined and show good agreement with those of a previous study.In the present study the load-bearing capacity of the floor frame of van-type structures is about 80 percent of the total loadings.

不織布의 構成條件에 따른 壓縮彈性의 變化에 관한 硏究

金泳錫,申鉉世 崇田大學校 1983 論文集 Vol.13 No.1

Lately, non-woven fabric is used for materials of industry, and the uses of the fabric are increasing continuously. The purpose of this study is to investigate the difference of compressional properties in various structures of non-woven fabrics and is to research into the effective forming conditions to improve the quality of above fabric. The results of this study are summarized as follows; 1) If non-woven fabric has same packing factor, the works of compression and recovery are increasing proportionally by the increase of thickness. 2) If non-woven fabric has same thickness, compressibility is decreasing proportionally by the increase of packing factor. 3) The compressional properties of non-woven fabric are related deeply to the properties of composed fibres. The good compressional properties are obtained when composed fibre has a good elastic recovery. From the above results, it is recognized that suitable fibre, thickness and packing factor are very important conditions in manufacturing of non-owven fabric.

잎담배 생산농가의 경작규모별 곁순방제 소요노동력 조사

최상진,김영신,이학수,석영선 충북대학교 연초연구소 2004 煙草硏究 Vol.19 No.-

This study was carried out to decect efficient method of sucker control classifed by cultivation hectarage per farm in 57 farms selected in the main producing districts of flue-cured and burley tobacco. In topping, it was no difference of working hours by cultivation hectarage per farm in flue-cured and burley tobacco. Suckering was the best in working hours among working type, and the more cultivation hectarage per farm was small, the more working hours of topping, suckering and application of suckercide was increased. Application of system suckercide shows a decrease as compared with application of contact suckercide but the decrease of working hours in application of contact suckercide by cultivation hectarage per farm was larger than in system suckercide. 경작면적별 효율적인 곁순억제방법을 알아보고자 황색종 및 버어리종 주산지에서 57개 경작농가를 선정하여 조사한 결과를 요약하면 다음과 같다. 1. 적심작업의 경우 황색종과 버어리종 모두 경작면적에 의한 노력소요량의 차이는 없었다. 2. 곁순제거작업은 다른 작업에 비해 노력소요량이 가장 많았고, 경작면적이 작을수록 노력소요량이 증가하였다. 3. 황색종과 버어리종 모두 침투성 곁순억제살포작업에 비해 접촉성 약제살포작업에서 노력소요량이 많았으나 경작면적이 큰 경우 접촉성 약제 살포작업 노력소요량 감소폭이 침투성 곁순억제제 살포작업에 대한 노력소요량 감소폭보다 컸다. 4. 각 작업에 대하여 농가간 최저 및 최고 노력소요량 차이가 큰 것으로 나타나 조사방법과 시기를 보완하여 보다 체계적이고 세밀한 조사가 추가적으로 이루어져야 할 필요가 있다.

Rotary type과 linear type 자동흡연 장치에 따른 담배연기 중 타르, 니코틴 및 일산화탄소의 함량 비교

정재훈,김영신,임흥빈,석영선,신주식,이학수 충북대학교 연초연구소 2004 煙草硏究 Vol.19 No.-

본 실험은 type별 흡연 장치의 담배 주류연 포집에 대한 차이를 비교하고자 주류연 중 일반적인 다량의 성분을 측정하였다. 1. 니코틴 함량은 대체로 linear-type 흡연 장치에서 높은 경향 이였으나 유의한 차이는 없었다. 2. 수분 함량은 두 가지 type 간에 유의한 차이는 없었다. 3. tar 함량은 저 농도에서 linear-type 보다 otary-type 흡연 장치가 높은 경향 이였으나 유의한 차이는 없었다. 4. 일산화탄소는 rotary-type과 linear-type 모두 유의한 차이는 없었다. 본 실험결과 ISO 표준 흡연 조건에서 담배 주류연의 tar, 니코틴, 일산화탄소 함량의 측정은 흡연 장치의 type별 통계적으로 유의한 차이는 없는 것으로 판단된다. This study was conducted to compare rotary-type with linear-type automatic smoking machine referred to ISO 3308 in the determination of tar, nicotine and CO in cigarette smoke. Sample were used with 4 kinds of domestic branded cigarettes(tar ; 1, 3, 6, 10 mg/cig) and CORESTA Monitor 4 cigarettes(tar ; 14 mg/cig). Tar and nicotine contents were analysed by gas-chromatograph methods in accordance with ISO 4387 and 10315-1. Determination of carbon monoxide in the vapour phase of cigarette smoke was meaured by NDIR method in ISO 8454. Sample preparation were performed in conditioning room at 22℃, 60 % for 48 hours according to ISO 3402. There was no significant difference between two smoking machine from 1 mg/cig to 14 mg/cig tar cigarettes, but, the contents of three components measured by rotary type showed higher tendency than those by linear type in the case of hight tar cigarettes. The results were the opposite in low tar cigarettes.

Seasonal Variations of Metacercarial DEnsity of Clonorchis sinensis in Fish Intermediate Host, Pseudorasbora parva

강신영,김석일,조승열,Gang, Sin-Yeong,Kim, Seok-Il,Jo, Seung-Yeol The Korean Society for Parasitology 1985 The Korean Journal of Parasitology Vol.23 No.1

간흡충 유행지역에서 포획한 참붕어에 감염된 간홉충 퍼낭유충의 감염율을 관찰하고 아울러 감염밀도가 계절적으로 변화하는 양상을 파악하고 수리적 모델에 적용하고자 하였다. 1983년 3월부터 1984년 2월까지 경상남도 김해시에 위치한 선암강에서 포획한 참붕어 총 788마리를 대상으로 하여 1마리씩 인공소화시켜 퍼낭유충의 수를 관찰하였다. 그 결과를 요약하면 다음과 같다. 1. 일년동안의 간흡충 피낭유충의 총 감염율은 788중 513마리로 65.1%이었다. 월별로는 5월, 6월, 7월 및 9월에 포획한 참붕어의 감염율은 82.0%에서 98.6%의 범위에 있었으나 3월, 4월, 11월 및 2월의 감염율은 11.4% 에 서 64.7%이었다. 2. 월별로 관찰하였을 때 피낭유충 감염밀도의 변화는 감염율과 상응하는 양상을 보였으며 일년동안 한 마리당 피낭유충 평균감염밀도는 103.0개이었고 표준편차는 118.9개로 나타났다. 평균 피낭유충 밀도는 6월에 가장 높아 294.8개이었으나 11월에서는 11.1개로 가장 낮은 수치를 보였다. 3. 3월, 4월, 11월 및 2월에 검사한 참붕어내 퍼낭유충의 분포양상은 음의 이항확율분포에 일치(p>0.05)하였 으나 한껄 5월 6월 7월 및 9월에 검사한 것은 대수정규확율분포에 부합(p>0.05 및 P>0.75)됨을 알 수 있었다. 평균치에 대한 분산의 비율은 7월(814.3)에 가장 높았으나 11월에서는 가장 낮았다(158.8). 이상의 결과에서 농후한 간홉충 유행지역에서 참붕어내의 간홉충 피낭유충 감염율과 감염밀도는 계절적으로 영향을 받는 것으로 나타났다. 계절적 변동에 관여하리라고 생각하는 요인에 대하여 검토하였다. The seasonal variations of the rate and intensity of metacercarial infection of C. sinensis in P. parva were observed. The fish were collected at Sun-Am River which located in Kim-Hae City, Kyong-Sang Nam Do (=Province), Korea, from March 1983, to February 1984 every month. A total of 788 fish was examined. The number of metacercariae in each fish was individually counted after the individual digestion by artificial gastric juice. The results were as follows: 1. During one year, 513 (65.1%) out of 788 fish were infected with metacercariae. In May, June, July and September, the infection rates ranged from 82.0% to 98.6% whereas the rates was relatively low in March, April, November and February ranging from 11.4% to 64.7%. 2. The intensity of infection was similar with those of infection rates. The mean intensity per infected fish was 103.0 and standard deviation was 118.9 throughout one year. The highest mean intensity was in June (294.8) and the lowest in November (11.1). 3. The observed frequency of fish with certain intensities of metacercariae were fitted to theoretical equations derived from negative binomial distribution in March, April, November and February (p>0.05). Meanwhile, the equation of lognormal distribution were fitted with the observed frequencies in May, June, July and September (p>0.05, p>O. 75). The variance/mean ratio varied by month. The value was the highest in July (814.3) and the lowest in November (158.8). Unlike our hypothesis, the metacercarial density of Clonorchis sinensis in its the most favorable fish host, Pseudorasbora parva showed considerable seasonal variations in the hyperendemic area. The possible factors were discussed.

당뇨병과 관련된 정신병리 : 정신증상, 특히 우울증상을 중심으로 Deal with Psychiatric Symptoms, Especially Depressive Symptoms

우이혁,최신영,김정기 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.3

This study was performed to find out psychopathological characteristics related with diabetes mellitus(DM) in comparison with known DM patients, newly diagnosed DM patients, normal subjects. These three groups were examined with Beck Depression Inventory(BDI) & Symptom Check List-90-Revision(SCL-90-R). The results were as follows : 1) Known DM patients showed significantly higher scores on BDI, and all subscales of SCL-90-R than normal subjects. 2) The BDI score of known DM patients was simillar with newly diagnosed DM patients while known DM patients showed significant differences in comparison with newly diagnosed DM patients on Depression and Obsession subscale in SCL-90-R. 3) The content of depressive symptoms of known DM patients was similar with that of newly diagnosed DM patients. 4) Newly diagnosed DM patients showed higher tendency on BDI score and Interpersonal sensitivity, Depression, Anxiety, Hostility, Phobic Anxiety subscale score of SCL-90-R than normal subjects. 5) There were no differences in BDI score and all of SCL-90-R subscale score according to prevalence of DM except somatization subscale. Our study suggests that depression may be predisposed to DM and the man who has high interpersonal sensitivity, anxiety, hostility, phobic anxiety is more susceptible to DM. Futhermore, DM makes worse preivious psychopathology probably. Therefore in the management of DM, it is important to treat them according to the aspects of depression and other psychopathological characteristics.

Nano-textured surfaces using hybrid micro- and nano-materials for efficient water cooling

Kim, Min-Woo,Kim, Tae Gun,Jo, Hong Seok,Lee, Jong-Gun,James, Scott C.,Choi, Mun Seok,Kim, Woo Yeong,Yang, Jae Sin,Choi, Jeehoon,Yoon, Sam S. Elsevier 2018 INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Vol.123 No.-

<P><B>Abstract</B></P> <P>Water cooling heat transfer was enhanced by texturing the heated surface with various micro- and nano-materials. The increased surface area by texturing facilitated not only enhanced convection, but also turbulent mixing, which increased the effective heat-transfer coefficient. A heated copper substrate was textured with electroplated copper oxide, sprayed silver nanowire, or sprayed copper micro-particles. Sprayed micro-particles were subsequently nano-textured by sand blasting with kanthal (Mo<SUB>2</SUB>Si) nanoparticles. Because of the extremely high hardness of kanthal, sand blasting dimpled the surface to increase the total surface area. Optimal texturing was identified for each material. Hybrid cases combining two different texturing materials were also investigated. All cases were quantitatively compared and that with the highest effective heat transfer was identified. Texturing materials were characterized by scanning electron microscopy and X-ray diffraction. The coating methods are simple, rapid, and scalable and may be cost-effective texturing schemes for various electronics cooling applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Water cooling heat transfer was enhanced by texturing the heated surface with various micro- and nano-materials. </LI> <LI> The increased surface area enhanced convection and turbulent mixing. </LI> <LI> A substrate was textured with electroplated copper oxide, sprayed silver nanowire or sprayed copper micro-particles. </LI> <LI> The texturing methods are appropriate for electronics cooling applications because of their simplicity and scalability. </LI> </UL> </P>

Macronutrient Analysis of Human Milk according to Storage and Processing in Korean Mother

Kim, Min Hyung,Shim, Kyu Seok,Yi, Dae Yong,Lim, In Seok,Chae, Soo Ahn,Yun, Sin Weon,Lee, Na Mi,Kim, Su Yeong,Kim, Seung The Korean Society of Pediatric Gastroenterology 2019 Pediatric gastroenterology, hepatology & nutrition Vol.22 No.3

Purpose: As the importance of breastfeeding has been reinforced, human milk is often stored for practical reasons. Therefore, we evaluated optimal storage and processing methods for human milk from a nutritional standpoint. Methods: Human milk samples were collected between June 2017 and February 2018. Also, data about maternal information were collected. Human milk was analyzed for macronutrients and caloric content. The samples were subdivided into groups for nutrient analysis. The control group (fresh milk) was not stored or processed. The other groups (9 groups) consisted of samples analyzed based on different storage temperatures (room temperature, refrigerated, frozen), defrosting methods (bottle warmer, room temperature thawing, microwave oven), and storage period (1 week, 1 month, 2 months) and compared with the control group. Results: There was no statistically significant difference in the nutrient content of human milk among the collected samples. A significant change in the content of macronutrients in milk samples was observed under storage condition at different temperatures for 1 week with subsequent thawing with bottle warmer compared to fresh milk. Under storage at $-20^{\circ}C$ for 1 week with subsequent thawing with different defrosting methods, a significant change in the content of macronutrients in milk samples was observed compared to fresh milk. After storage at $-20^{\circ}C$ for different periods and thawing with a bottle warmer, a significant change in macronutrient content in milk samples was observed compared to fresh milk regardless of the storage period. Conclusion: Unlike previous guidelines, changes in macronutrient content in milk samples were observed regardless of the method of storing and thawing. Apparently, it is proposed that mothers should feed fresh human milk to their babies without storing.

[P5-34] Monitoring of Vibrio parahaemolyticus Contaminated Level in Fishery Products, Korea, 2006

Yeong-Min Sin,Jong Mi Lim,Seung Hwan Kim,Soon Han Kim,Chang Yong Yoon,Kil Jin Kang,In Sun Joo,Ok Soon Heo,Kun-Sang Park,Ok Hee Kim,Dae Hyun Cho,Dai Byung Kim 한국식품영양과학회 2007 한국식품영양과학회 학술대회발표집 Vol.2007 No.10

[P6-09] Monitoring of Major Foodborne Pathogenic Bacteria in Seafoods Busan & KyungNam Province, 2004 - 2005

Yeong-Min Sin,Hee Sook Lee,Jong Mi Lim,Hyun Jeong You,Kun-Sang Park,Ok Hee Kim,Dai Byung Kim 한국식품영양과학회 2006 한국식품영양과학회 학술대회발표집 Vol.2006 No.10