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이성만(Sung-Mhan Lee),이수창(Suchang Lee),오현식(Hyun-Shik Oh),성덕용(Duck-Yong Sung) 한국항공우주학회 2007 韓國航空宇宙學會誌 Vol.35 No.1
국내 개발에 성공한 기본훈련기(KTX-1) 시제기 및 외부연료탱크를 활용하여 유도무기에 적용되는 핵심 부품의 비행환경 성능을 검증할 수 있는 탑재비행시험(Captive Flight Test) 절차 및 결과를 소개한다. 2001년부터 2006년까지 총 150 쏘티 이상의 탑재비행시험을 통하여 국내 개발된 탐색기, 항법장치/기법, 관성센서, 전파고도계 등을 비행환경에서 시험ㆍ평가하여 유도무기체계 연구개발 단계에서 일정단축 및 비용절감에 기여하였다. The process and results of Captive Flight Test(CFT), conducted by Agency for Defense Development(ADD) using the Korean KTX-1 trainer and external fuel tank, are presented. Through over 150 sorties of CFT, the guided weapon system's critical subsystems like Seeker, Navigation Device and Technology, Inertial Sensor, and Radio Altimeter are tested and evaluated. Using the CFT, time and cost are saved in weapon system research and development procedure.
Comparison of rapid screening immunoassay and intradermal test for canine atopic dermatitis
Yeseul Lee,Ji-Houn Kang,Dong-In Jung,Young-Bae Jin,Sang-Rae Lee,Mhan-Pyo Yang,Byeong-Teck Kang 충북대학교 동물의학연구소 2015 Journal of Biomedical and Translational Research Vol.16 No.3
The intradermal test (IDT) has been developed for confirming diagnosis of canine atopic dermatitis (CAD). Prior to performing IDT, rapid immunoassay (Allercept E-screen 2nd generation; ES2G) can detect allergen-specific immunoglobulin E (IgE) antibodies in canine serum. The objective of this study was to evaluate agreement between IDT and immunoassay in diagnosis of CAD in domestic atopic dogs. Forty dogs were diagnosed with CAD in accordance with Favrot’s criteria. Intradermal testing was performed using 39 selected allergens. ES2G detected IgE antibodies specific for three allergen groups, including indoor allergens, grasses and weeds, and trees. Among 19 dogs diagnosed by IDT, the highest positivity was observed in house dust mites, followed by molds, epidermis and inhalants, house dust, and weeds. A total of 28 atopic dogs were evaluated by rapid ES2G immunoassay. Indoor allergens showed the strongest positive reaction, followed by grasses/weeds and trees. IDT and ES2G were performed concurrently in 17 dogs. The results of ES2G showed slight agreement with those of IDT. Level of agreement was highest for indoor allergens, which showed a predictive positive value of 100% in ES2G. These results indicate that a rapid immunoassay may be valuable for predicting the results of IDT in atopic dogs sensitized to indoor allergens.
( Young Jung Lee ),( Dong Young Choi ),( Yeo Pyo Yun ),( Sang Bae Han ),( Hwan Mook Kim ),( Kiho Lee ),( Seok Hwa Choi ),( Mhan Pyo Yang ),( Hyun Soo Jeon ),( Jea Hwang Jeong ),( Ki Wan Oh ),( Jin Tae 영남대학교 약품개발연구소 2013 영남대학교 약품개발연구소 연구업적집 Vol.23 No.0
Magnolia bark contains several compounds such as magnolol, honokiol, 4-O-methylhonokiol, obovatol, and other neolignan compounds. These compounds have been reported to have various beneficial effects in various diseases. There is sufficient possibility that ethanol extract of Magnoliaofficinalis is more effective in amyloidogenesis via synergism of these ingredients. Neuroinflammation has been known to play a critical role in the pathogenesis of Alzheimer`s disease (AD). We investigated whether the ethanol extract of M. officinalis (10 mg/ kg in 0.05% ethanol) preventsmemory dysfunction and amyloidogenesis in AD mouse model by intraperitoneal lipopolysaccharide (LPS, 250 μg/ kg/day for seven times) injection. We found that ethanol extract of M. officinalis prevented LPS-induced memory deficiency as well as inhibited the LPS-induced elevation of inflammatory proteins, such as inducible nitric oxide synthase and cyclooxygenase 2, and activation of astrocytes and microglia. In particular, administration of M. officinalis ethanol extract inhibited LPS-induced amyloidogenesis, which resulted in the inhibition of amyloid precursor protein, beta-site amyloid-precursor-protein-cleaving enzyme 1 and C99. Thus, this study shows that ethanol extract of M. officinalis prevents LPS-inducedmemory impairment as well as amyloidogenesis via inhibition of neuroinflammation and suggests that ethanol extract of M. officinalis might be a useful intervention for neuroinflammation-associated diseases such as AD. Copyright ⓒ2012 John Wiley & Sons. I.td.
Kim, Dong-Woon,Cho, Sung-Back,Lee, Hyun-Jeong,Chung, Wan-Tae,Kim, Kyoung-Hoon,HwangBo, Jong,Nam, In-Sik,Cho, Yong-Il,Yang, Mhan-Pyo,Chung, Il-Byung The Microbiological Society of Korea 2007 The journal of microbiology Vol.45 No.4
The principal objective of this study was to compare the effects of whole and hydrolyzed cells (bifidobacteria) treated with gastrointestinal digestive enzymes on the activation of cloned macrophages. Seven different strains of Bifidobacterium obtained from swine, chickens, and rats, were digested with pepsin followed by pancreatin and the precipitate (insoluble fraction) and supernatant (soluble fraction) obtained via centrifugation. The RAW 264.7 murine macrophages were incubated with either whole cells, the precipitate, or supernatant at various concentrations. Pronounced increases in the levels of nitric oxide (NO), interleukin $(IL)-1{\beta}$, IL-6, IL-12, and tumor necrosis factor $(TNF)-{\alpha}$ were observed in the whole cells and precipitates, but these effects were less profound in the supernatants. The precipitates also evidenced a slight, but significant, inductive activity for NO and all tested cytokines, with the exception of $(TNF)-{\alpha}$ in the macrophage model as compared with the whole cells. By way of contrast, $(TNF)-{\alpha}$ production when cultured with whole cells (100 ng/ml) resulted in marked increases as compared with what was observed with the precipitates. The results of this study indicated, for the first time, that digested Bifidobacterium sp. can induce the production of NO and several cytokines in RAW 264.7 murine macrophage cells. In the current study, it was demonstrated that Bifidobacterium strains treated with digestive enzymes, as compared with whole cells, are capable of stimulating the induction of macrophage mediators, which reflects that they may be able to modulate the gastrointestinal immune functions of the host.
구속조건이 있는 문제의 적응 전역최적화 효율 향상에 대한 연구
안중기(Joongki Ahn),이호일(Ho-il Lee),이성만(Sung-Mhan Lee) 한국항공우주학회 2010 韓國航空宇宙學會誌 Vol.38 No.6
본 논문은 Kringing 근사모델이 제공하는 확률정보를 이용하여 순차적으로 전역 최적해를 찾는 내용을 담고 있다. 적응 전역 최적화란 소수의 실험 점으로 구성한 근사모델의 예측 값과 불확실성을 고려하여 다음 실험 점을 찾고, 이를 이용하여 근사모델을 개선함으로써 순차적으로 해를 찾는 방식이다. 본 연구에서는 근사모델에서 도출한 기대값을 이용하여 개선시킬 필요가 없는 구속함수나 목적함수를 식별함으로써 계산효율을 증대시키는 기법을 제안한다. 다음 단계의 후보 실험점이 유용영역의 비활성일 가능성이 있을 경우 또는 목적함수를 개선시킬 가능성이 희박할 경우, 이 점은 근사함수를 개선하는 데 사용하지 않았다. 본 기법을 비선형성이 강한 시험문제에 적용한 결과, 제안하는 기법이 정밀도는 보장하면서 계산 효율을 증대시키는 것을 확인할 수 있었다. This paper addresses the issue of adaptive global optimization using Kriging metamodel known as EGO(Efficient Global Optimization). The algorithm adaptively chooses where to generate subsequent samples based on an explicit trade-off between reduction of global uncertainty and exploration of the region of the interest. A strategy that saves the computational cost by using expectations derived from probabilistic nature of approximate model is proposed. At every iteration, a candidate test point that seems to be feasible/inactive or has little possibility to improve for minimum is identified and excluded from updating approximate models. By doing that the computational cost is saved without loss of accuracy.
철도사상사고의 위험도분석을 위한 효율적인 위험사건 구성방안에 관한 연구
신형진(Shin Hyoung-Jin),김만웅(Kim Mhan Woong),최양규(Choi Yang Gyu),이장규(Lee Jang kyu),한상복(Han Sang Bok) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
Railway passenger and public, worker typically have high potential of death and injury accident, as they are to be frequently adjacent to train or train operation. In order to reduce the risks associated with the passenger and public, worker effectively, a systematic risk analysis must be performed to access the hazards that contribute to the accidents. In this study, hazard event are identified for the passenger and public, worker by analysing data from Korea Railroad and Metropolitan Companies that have occurred between the year of 2007 and 2009. The hazard event list produced in this study is expected to be effectively used for the risk assessment of the railway death and injury, A successful risk assessment can be determined by efficiency event composition such as location of event, status of event, type of event, and subject of event.