• Journal of the KSME
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• v.27 no.6
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• pp.504-514
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• 1987

복잡한 전자부품의 조립시에 필요한 열적 디자인에 관한 정보는 오래전부터 실험을 통하여 얻어지고 있다. 실험적 데이터를 이용하여 무차원 파라미터로 표시된 실험결과는 꼭 같지는 않지만 현상적으로는 비슷한 상황에 응용될 수 있다. 여기서는 학술문헌에 나타나 있는 자연대류에 관한 실험적인 상관관계식들과 프레임에 수직으로 꽂혀있는 균일가열 전자회로기판의 모델에서 얻어진 무차원 자료들을 비교하고자 한다. 대부분의 자료들은 수정채널 Rayleigh수(Ra")가 15~100범위에 속하며, 이러한 범위는 부품이 조밀하게 배치된 기관이 서로 좁은 채널을 이루고 있으며, 동시에 상당한 전력을 소비하고 있는 경우에 해당한다. Wirt와 Stutzman, Bar-Cohen과 Rohsenow의 일반상관관계식은 AT'||'&'||'T Bell 연구소에서 개발된 전자기기를 이용하여 수집한 실험데이터를 잘 표현하고 있으며 10 < Ra" <1,000범위에서 추천될 수 있다. 두개의 유사한 상관관계식과 비교할 때 상당히 좋은 예측을 보였으며 또한 Sparrow와 Gregg의 연구결과와도 잘 일치하므로 Ra" < 10인 경우에 Aung의 완전발달층류의 채널유동방식, Ra" > 1,000인 경우에는 Aung등의 단일 수직평판 근사식이 추천될 수 있다. Coyne의 알고리즘에 의한 계산치는 10

• Korean Journal of Animal Reproduction
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• v.22 no.4
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• pp.419-424
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• 1998

The present study was carried out to examine the efficiency of cloning of transgenic embryos by nuclear transfer(NT) using gene-injected rabbit embryos. The rabbit embryos at pronuclear stage were microinjected with methallothionein-human growth hormone(MT-hGH) gene and cultured to 8- and 16-cell in TCM-199 containing 10% FCS with a monolayer of rabbit oviductal epithelial cells in a 5% $CO_2$incubator. The recipient oocytes were collected from the oviducts 14~16 h after hCG injection. The oocytes were enucleated and activated with 5$\mu$M ionomycin and 2mM 6-dimethylaminopurine. Blastomeres form gene-injected embryos were transferred into the enucleated oocytes by micromanipulation. The nuclear transplant oocytes were electrofused and co-cultured with rabbit oviductal cells. Following 120 h of culture, blastocysts were prepared for gene analysis by polymerase chain reaction(PCR). In previous experiment, the rate of gene-positive embryos detected by the nested PCR analysis was significantly decreased while developing to blastocyst(25%)(Kang et al., 1998). The fusion rate of gene-injected blastomeres was significantly(P＜0.05) lower than non-injected blastomeres(66% vs 80%). However, the NT embryos that were derived from gene-injected donor embryos did not differ from control embryos in development to the blastocyst stage(39% vs 31%). Of the 43 NT blastocysts developed from the gene-injected donor embryos, twelve(28%) were positive for the injected DNA. The results indicate that NT with gene-injected embryos can be successfully used for cloning and multiplication of transgenic embryos, furthermore applicable to improvement of transgenic animal production.

• 대한공업교육학회지
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• v.35 no.2
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• pp.82-111
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• 2010

The goal of this paper was to understand the skill-up experiences of ex-participants of the customized training program in Technical High Schools for Small and Medium Business during first 2 years in Company through qualitative interviews with 3 purposefully selected ex-participants. Their core skill-up experience in this period was assumed as the shift from' dependent worker' to 'independent worker' on the base of literature review. The results of this study were following : 1. The small and medium companies offered a few formal training for newcomers, production-site orientation through short job rotation, linking them with skilled workers and job manuals or job standards. 2. Authentic skill-up experiences were combined with a structured reprimand, peer learning, deep learning through reflection on one's own experiences. 3. There were a few handicap conditions that disturbed their skill-up activities: the skilled worker don't open their skill toward new corner; the ex-participants in company had no time to learn anything meaningful to up-grade their competency.

• 한국가스학회:학술대회논문집
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• 1997.09a
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• pp.121-126
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• 1997

우리나라는 그동안 가스산업에서 고속성장을 이룩해 왔으나, 근래에는 중대가스산업사고가 빈번하게 일어나고 있다. 그런 이유로 1996년도에는 중대산업사고 예방제도가 전면적으로 실시되고 공정안전보고서를 자성하여 제출하도록 함으로서 위험성 평가의 중요성이 점차 높아가고 있으며, 위험성 평가 기법들에 대하여 여러 연구 단체에서 연구${\cdot}$ 시도되고 있다. 또한 이러한 연구${\cdot}$보고된 위험성 평가 기법들을 프로그램화하고 적용하려는 시도가 많이 있어 왔다. 본 연구에서는 기존에 연구${\cdot}$개발된 위험성 평가 기법들에 최근 컴퓨터 산업의 발달에 힘입어 각광을 받고 있는 지리정보시스템을 적용하고자 한다. 이러한 가스산업시설의 위험성 평가 시스템은 위험성을 평가하기 위해서 필요한 여러 가지 정보들을 지리정보시스템이 속성 데이터로서 저장하고 있으며, 가스산업시설에 관련된 주변의 도민들을 공간 데이터로서 저장하고 있다. 그리고 위험성 평가 시스템의 세부적인 기능을 모듈화하였다. 우선 위에 언급한 속성 데이터와 공간 데이터를 관리하는 모듈과 이러한 데이터를 가지고 사고영향 범위를 산출해내기 위한 모듈, 그리고 산출된 사고 영향 범위를 도면에 나타내는 모듈로 나뉘어져 있다. 이렇게 지리정보시스템에 구축되어 있는 도면에 위험성을 평가한 결과치를 나타냄으로서 위험성 평가 숙련자가 아니더라도 위험성 평가를 할 수 있고 결과를 분석하도록 도와 줄 수 있도록 할 수 있다. 또한 향후 재난관리시스템에서는 도면상의 도로에 교통량 가중치와 인근 소방서와 경찰서등의 위치를 관리하도록 지리정보시스템을 적용할 수 있으며, 가스시설물 관리시스템에서는 최근 대형가스사고의 대부분이 타공사에 의한 것임을 고려하여 가스배관망을 포함하여 기타 다른 지하배관망을 관리하도록 지리정보시스템을 적용할 수 있다.기질로서 이용하지 못하므로 invertase 및 ${\alpha}-glucosidase$ 활성이 없는 것으로 나타났다.)의 모양은 배양에 의해 형성된 균핵(菌核)의 모양과 다소 차이가 있었다. R. cerealis의 균사생장(菌絲生長) 적온(適溫)은 $23^{\circ}C$였으며, 다른 균핵진균(菌核眞菌)들의 균사생장(菌絲生長) 적온(適溫)은 $27-33^{\circ}C$였다. 일부 균핵진균(菌核眞菌)들의 균사생장(菌絲生長) 최고온도(最高溫度)는 $41^{\circ}C$ 로서 높은 반면, R. cerealis 의 균사생장(菌絲生長) 최고온도(最高溫度)는 $31^{\circ}C$로서 낮았다. R. cerealis 의 균사생장(菌絲生長) 최저온도(最低溫度)는 $2^{\circ}C$ 였으며, 다른 균핵진균(菌核眞菌)들의 균사생장(菌絲生長) 최저온도(最低溫度)는 $6-10^{\circ}C$였다. 시술(施術)하였다. 10. 한양방향시치료시(韓洋方同時治療時) 양호이상(良好以上)의 효과(效果)를 보인 경우(境遇)가 30건중(件中) 21건(件)으로 70%의 치료효과(治療效果)를 보여 한방단일진료시(韓方單一診療時)보다 다소 높은 치료효과(治療效果)를 나타냈다. 11. 1일평균(日平均) 한방진료건수(韓方診療件數)는 26.95명(名)이었고, 1일평균(日平均) 한방초진환자수(韓方初診患者數)는 3.9명(名)으로 나타났으며, 한방진료(韓方診療)가 양한방(洋韓方) 총진료(總診療)의 23.20%를 차지했고, 1일(日) 평균(平均) 한양방(韓洋方) 총진료건수(總診療件數)에 대(對)해 1일(日) 평균(平均) 한방초진건수(韓方初診件數)가 21.51%를 차지하는 것으로 나타났다.험이 완료된 31명에서는 부작용이 없거나 경도의 부작용이 있었으나 임상적

• The Journal of the Petrological Society of Korea
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• v.11 no.3_4
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• pp.157-168
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• 2002

In Gimcheon area of the central Yeongnam massif granite gneiss occurrs with intercalated biotite gneiss at xenolith or restite. In order to understand the evolution of the central Yeongnam massif, it is essential to have absolute age information, but not many age data are available yet. Furthermore the previous age determinations from the study area are not compatible with the outcrop relationship. In this study we determined chemical ages from the zircon grains. We obtained ages of $1970\pm$ 78(l$\sigma$)Ma from the granite gneiss, $1814\pm$77(l$\sigma$)Ma from the outer rim of a rounded zircon and 1973$\pm$97(l$\sigma$)Ma from a longish zircon, both from the biotite gneiss. These ages seem to indicate the timing of granitic magma intrusion and subsequent metamorphism. Ages of $2954\pm$ 158($l\sigma$)Ma, 2440$\pm$58(l$\sigma$)Ma, and 2219$\pm$36($l\sigma$)Ma obtained from zoned core of the rounded zircon grain from the biotite gneiss suggest various geological events before such metamorphism of the biotite gneiss. Ages in the range of 1450~1670 Ma observed in zircons of both gniesses suggest later metamorphism that the granite gneiss and the biotite gneiss experienced together. The chemical age determination by electron probe micro-analyzer of this study utilized 1$\mu\textrm{m}$ beam diameter and it seems to be a very useful age determination from the zircons with complex growth history because of superior spatial resolution.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.12
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• pp.2712-2716
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• 2011

The development of mobile phone is growing everyday according to the change of our age. Most of all, the birth of smart phone has gotten lots of attentions. The Smart Phone has not only nalogue functions for calling and receiving but also has many multiple-service functions satisfying the contemporary digital needs. Due to the smart phone, people could access to various and plenty information simply by touching it. It was Sep. 2011 that the number of smart phone users began to be more than 15,000,000. That number stands for the turning point of digital revolution. In Korea, both of "Omnia" from Samsung and "i-phone" from Apple came into the market near the end of 2009. That time was so called the full-scale first smart-phone war, and thinking of the time, it could be named as the explosive growth of smart phones. We can predict that the smart phone will influence the real life of human beings not only the mobile phone market. In this way, the smart phone has come deeply into our life day by day. For instance, more people can be able to get the informations of their trip for their leisure and free weekends through the smart phone. Thus, our study, began with the theme of "Korean islands trip", will start in the relationship with the Application-Services, "Islands" utilizing web-pictures.

• Korean Security Journal
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• no.25
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• pp.63-87
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• 2010

Our society nowadays sees the increase in damage from crime on lives and properties by leaps and bounds in line with the economic take-off, and as a result, the raise of individual income. When considering such a hike in crime, it is desirable that the police framework be enhanced. However, thanks to the failure to correspond to this, it could be safely said that a good portion of accountability was shifted to the private security industry in regard to security for the people. Accordingly, the request for escort security business is on the increase regarding expansion and improvement about this industrial sector. As such, it is necessary to get the related system rearranged for authority on the part of escort guards, who are directly exposed to numerous crimes. On top of this, dispersion is required for the escort security businesses centralized in the metropolitan area. It is also necessary for the security guard system to be strengthened and disintegrated into details so that the escort security services are available to people in more safe and easily manners than ever before. When the qualification regime is operated based on this refreshed system, the efficient escort security work would be realized. The dichotomy into act on Special Security Guard and act on Security Business should be dealt with once again for integration as an issue on the front burner in the academic area, and through which the escort security market could be fit for the globalization as well. This paper would provide the solution that leads to more professional and efficient results from comprehension of progress situations in reality by starting from the concept on private security to the analysis of the conditions in this industrial sector.

• Journal of Oriental Neuropsychiatry
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• v.20 no.4
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• pp.185-196
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• 2009

Objectives : This case report presents a 7-year-old female patient diagnosed with conversion disorder improved by application of oriental medical psychotherapy, the Giungoroen. Her chief complaint was dysesthesia of anal. Methods : Through interview and several psychological testing such as HTP test, DAF test, JTCI 7-11, we assessed her psychological state and seek for the psychological reason induced her physical symptom, dysesthesia of anal. After assessment we concluded her main psychological problem was loss of love relationship with her parents. So we decided to use supportive psychological therapy and behavioral therapy-like changing upbringing attitudes of her parents, for example- with Herbal medicine treatment. Results : After 2-month of therapeutic period, chief physical symptom of patient-dysesthesia of anal-was reduced to 20% compared with first visit day. Conclusions : The Giungoroen corresponds to supportive psychotherapy and behavioral therapy. And this oriental medical psychotherapy is fairly effective on the treatment of conversion disorder in childhood.

• Korean Journal of Animal Reproduction
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• v.23 no.3
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• pp.213-220
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• 1999

The litter size has been the primary interest of economic traits in pig reproduction. It has been recently shown that insulin-like growth factor-Ⅰ(IGF-Ⅰ) plays roles in establishing pregnancy and in supporting fetal growth and development. But, the effect of serum IGF-Ⅰ on litter size has not been studied. Therefore, this study was conducted to relate serum IGF-Ⅰ concentration with porcine litter size and to investigate the possible connection with estrogen receptor(ER) as a candidate gene for the litter size. Sera during day 45 to 105 of pregnancy were collected from two groups showing high and low litter size and serum IGF-Ⅰ concentration was measured by radioimmunoassay (RIA). IGF-Ⅰ levels in both groups decreased gradually as pregnancy stage proceeded but were not significantly different. Secondly, DNA was extracted from blood and PCR-RFLP was utilized to analyze ER genotypes of pigs in each group, which produced three polymorphic patterns. Based on the ER genotypes analyzed, low litter size group showed higher IGF-Ⅰ concentration than high litter size group. Taken together, the results indicate that the serum IGF system was correlated with steroid system but not with the litter size in pigs. Thus, this study implies that porcine litter size could be determined locally at the ovary level.

• Journal of Food Hygiene and Safety
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• v.31 no.2
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• pp.67-73
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• 2016

Resveratrol is a non-flavonoid polyphenol which belongs to the stilbenes group and is naturally generated in several plants in response to damage or fungal invasion. It has been shown in published studies that resveratrol has an anti-adipogenic effect. A good consensus regarding the involvement of a down-regulation of $C/EBP{\alpha}$ and $PPAR{\gamma}$ in this effect has been reached. In addition, different metabolic pathways involved in triacylglycerol metabolism in white adipose tissue have been shown to be regulated by resveratrol. Concerning lipolysis, though this compound in itself seems to be unable to cause lipolysis, it increases lipid mobilization stimulated by ${\beta}-adrenergic$ agents. The increase in brown adipose tissue thermogenesis, and accordingly the associated energy dissipation, can attribute to accounting for the body-fat reducing effect of resveratrol. Besides its effects on adipose tissue, resveratrol can also acts on other organs and tissues. Therefore, it increases mitochondrial biogenesis and accordingly fatty acid oxidation in skeletal muscle and liver. This effect can also attribute to the body-fat reducing effect of this molecule. The present review purposes to collect the evidence concerning the potential mechanisms of action which underlie the anti-obesity effects of resveratrol, acquired either in cultured cells lines and animal models.