창공91의 비행 시험을 통한 지면 효과 측정에 관한 연구

황명신,장욱진,이정훈 한국 항공대학교 항공산업기술연구소 1996 航空宇宙産業技術硏究所 硏究誌 Vol.6 No.-

창공-91 비행기를 이용하여 비교적 양항비가 큰 비행기의 지면 효과를 측정하는 연구를 수행하였다. 이착륙 중에는 지면에 의한 영향에 의해 공기역학적인 특성이 변화하며, 따라서 조종 특성에 많은 영향을 준다. 지면 효과에 대한 연구는 특히 시뮬레이터를 설계하는데 기초적인 자료로서 대단히 중요하지만 측정의 어려움 등으로 인하여 거의 연구 자료가 없다. 본 연구에서는 경비행기인 창공-91을 이용하여 여러 가지 비행 형태에 대해 지면 효과를 측정하기 위한 비행 시험을 수행하였다. 비행 형태는 실제 이착륙 조건을 고려하여 플랩 1단, 2단, 3단에 대하여 수행되었으며, 본 연구에서는 적은 비행회수로도 지면 효과를 측정할 수 있는 일정 받음각 방법을 이용하여 비행을 하였다. 실제 비행 시험 결과 지면 가까이에서 양력의 증가를 확인할 수 있었지만 항력과 키놀이 모멘트의 변화를 측정하기는 어려웠다. When an airplane flies close to the ground, at a height of one or two wing spans, it experiences an increase in lift and significant changes in drag and pitching moment. This phenomenon is known as ground effect. A study on the Ground Effect of Chang-Gong 91 was conducted by the flight test. Because of the obvious influence of ground proximity during the takeoff and landing phases, it has been the subject of considerable investigation, especially for simulator design. However, despite this consideration, an adequate amount of reliable ground-effects data does not appear in the literature. A Constant Angle of Attack approach technique was used to measure ground effect on several aircraft configuration. Test results indicate that ground proximity produces and increase in the lift-curve slope for Chang-Gong 91

응급실 내원시 예상치 못한 사망 환자의 예측 인자

김욱진,서정필,정성필,황태식,이한식 대한응급의학회 1998 대한응급의학회지 Vol.9 No.4

Background: Unexpected deaths of the patients at ED are surprising to the medical staffs as well as the families. It may also increase the possibilities of medico-legal problems. This study was conducted to review the unexpected death in ED and find the predictive factors leading patients to unexpected death. Methods: A retrospective study with reviewing available medical records of 183 patients who were expired at Ed of Shinchon Severance Hospital from Mar. 1997 to Feb. 1998 and 103 patients of Youngdong Severance Hospital from Mar. 1996 to Feb. 1998 was done. Analyses were done on 30 variables of physical findings, laboratory results, procedures and therapies. We used univariate analysis such as t-test and x²-test and multiple logistic regression analysis. Results: Of the total 286 deaths in Ed, 153 cases were enrolled in this analysis. The number of unexpected deaths were 76. Age, mental status, fraction of neutrophil count, BUN level, whether endotracheal intubation was done, use of inotropics were the factors with statistical significance on the univariate analysis, but only comatose mentality, endotracheal intubated case, and use of the inotropics were significant on logistic regression analysis. The longer the ED length of stay, the higher the rate of mortality and unexpected death. Conclusion: This result suggest that medical attention is needed on the patients with comatose decreased mental status, endotracheally intubated case and needing inotropic agents to prevent unexpected deaths shortening the ED length of stay may also be a factor for decrease the unexpected death rate.

PCA(Principal Components Analysis)를 이용한 지폐의 정사 분류

이준재,양황규,이재욱 東西大學校 1997 동서논문집 Vol.3 No.1

In this paper, an efficient classification algorithm using principal components analysis for enhancing the performance of the currently used bank note classification system is proposed. This method first transforms four feature vectors from sensing devices into principal components analysis, then maps the feature vectors to eigenvectors corresponding to maxium among eigenvalues. A cash is classified as new if it is greater than the threshold set by user, as old if it is not. The experimental result shows that the proposed system enhance the performance of the current system above 1%.

생물학적 수소생산의 연구동향

김진욱,황재웅,김진욱,이재화 신라대학교 자연과학연구소 2005 自然科學論文集 Vol.14 No.-

미국, 일본, 유럽 등은 수소에너지를 이용한자동차를 개발하였고 상용화시킬 계획까지 세우고 있다. 그리고 이미 수소충전소를 설치하였고 설치 계획 중인 나라들고 증가하는 추세이다 수소는 태양광, 석탄, LPG 등을 이용하여 생산하는 2차 에너지이다. 그 중 폐수의 슬러지를 이용하여 혐기성 발효시켜 수소를 발생시키는 방법이 1차 에너지를 이용하는 것보다 생산비가 절감된다. 혐기성 발효공정에는'가수분해 단계', '아세트산 생성단계', '메탄생성 단계' 로 나뉜다. 수소 생산 균의 pH, 온도, 체류시간에 따라 활성이 틀리고, 그 효율을 높이기 위한 다양한 방법들이 연구 되었다. The United States and Japan, the Europe back the commercial business anger to develop the automobile which uses a hydro energy until the plan which it will make it is building. And the country which is in the process of establishment planning already hydrogen charging smallness to establish it holds and it is a tendency which increases. The hydrogen uses the solar storehouse, the coal and the LPG back and it is a 2nd energy which it produces. It uses the sludge of the waste water in that and anaerobe it takes effect and the method which occurs the hydrogen is reduced 1st using an energy compared to the cost of production. To anaerobic taking effect process singer disjointing phase, acetic acid creation phase, it causes to defecate with the methane creation phased. The pH and temperature of the hydrogen production germ, it followed at stay hour and the activity was incorrect, it raised the efficiency and the methods which are various for were researched.

구강내 악성흑색종에 대한 임상연구

김욱규,허진호,황대석,김용덕,신상훈,김종렬,정인교 부산대학교 병원 암연구소 2008 부산대병원학술지 Vol.- No.23

The prognosis of oral malignant melanoma is poor compared with cutaneous melanoma. It may be related to the difficulty of wide enough resection, the early hematogenous matastases, higher stage at initial diagnosis, tendency to growth vertically. In the view of histological differences between oral mucosa and skin, it is impossible use Clark’s and Breslow’s classifications for prognosis. The great problem is that there is still no consensus on the treatment due to rarity. Because data collection from case reports is considered to be the best source of information and should be pooled to anlalyze key determinants of outcome, We reported on 6 cases of primary malignant melanoma of the oral cavity which were diagnosed and treated in Pusan National University Hospital recently and reviewed the literature. Immunohistochemical study on S100 Protein, GP 100 (HMB-45) with biopsy was usable to confirm the melanoma. Neck dissection including wide excision is recommended if lymph node involvement is suspected. Additionally, adjuvant chemotherapy could be supporting therapy.

선천성 완전방실차단이 동반된 신생아 루프스 1예

정재현,이은지,이은주,황진원,송영진,최병진,김일환,김종윤,허민영,김동욱 인제대학교 2009 仁濟醫學 Vol.30 No.-

Neonatal lupus is a rare syndrome occurring In neonates with tranplacentally acquired maternal autoantibodies, In particular anti-SSA/Ro-SSB/Ra antibodies. Manifestations include congenital heart block, cutaneous lesions, thrombocytopenia, neutropenia, pulmonary or neurological disease and hepatitis. The non-cardiac manifestations resolve by 6 months of age, congenital heart block is irreversible. We experienced a case of neonatal lupus with congenital complete heart block in a newborn of asyptomatic mother with anti-SSA/Ro-SSB/Ra antibodies.

A Study on the Endogenous Process of Implementing International Environmental Standards: Special Interest Politics Approach

Uk Hwang,Seok Joon Hwang,Mi Jin Kim,Jang Yul Cho 한국환경정책평가연구원 2006 기본연구보고서 Vol.2006 No.-

산업용 냉동기의 원격 제어 및 운전 상태 모니터링을 위한 시스템 구현

정진욱(Jin-uk Jung),진교홍(Kyo-hong Jin),황민태(Min-tae Hwang) 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.9

냉동기는 얼음을 만드는 기계이다. 이를 제조 및 판매하는 회사는 대부분 중소기업으로, 판매 후 사후 관리에 어려움을 겪고 있다. 사후관리의 어려움은 대부분 구매처의 불필요한 고객 서비스 요청에 기인하며, 이 요청은 결국 판매처와 구매처의 불필요한 비용 지출로 이어진다. 하지만 재정적으로 열악한 냉동기 제조 기업은 이 비용을 최대한 줄이고자 한다. 뿐만 아니라, 국외에 냉동기를 판매하고 싶어도 사후 관리 때문에 주저하고 있는 상황이다. 이러한 이유로 냉동기 제조업체는 직접 방문없이 원격지에서 냉동기의 상태를 확인하고 적절한 조치를 취할 수 있는 시스템을 필요로 하고 있다. 따라서 본 논문에서는 원격지에서 냉동기의 상태를 모니터링하고 필요에 따라 제어할 수 있는 냉동기 원격 제어 및 운전 상태 모니터링 시스템을 구현하였다. 개발된 시스템을 통해, 냉동기 제조업체와 냉동기 구매업체는 냉동기의 상태를 빠르게 파악함으로써 즉각적으로 고장에 대응할 수 있다. 게다가, 판매 후 유지보수 및 관리를 효율적으로 할 수 있어 비용절감에 큰 효과가 있을 것으로 예상된다. The ice machine is the machine for making ice. As most of the companies that manufactures and sells the ice machine are small and medium-sized companies, they have been they have been experiencing the trouble for the after-sales service after selling the machine. The difficulties of the after-sales service are mostly caused by unnecessary customer service requests of the purchaser, which eventually leads to the unnecessary expenditure of the seller and the purchaser. However, financially, the poor ice machine manufacturers want to reduce this cost as much as possible. Furthermore, even if they want to sell their products overseas, they are hesitating because of the after-sales service. For this reason, the companies making the ice machine need a system which checks the status of the ice machine and takes the proper actions without the visiting service. Therefore, this paper introduces the remote control and operational status monitoring systems which can monitor the status of the ice machine in the remote area and control it as needed. Through the developed system, the company manufacturing the ice machine and the manager of the ice machine can understand the current status of the ice machine and respond against the ice machine’s trouble, immediately. In addition, it can be expected to have great effects on cost reduction because the maintenance and management after selling can be efficiently performed.

지지면에 따른 균형훈련이 하이힐을 신은 여성의 균형능력에 미치는 영향

황진욱 ( Jin Uk Hwang ),배원식 ( Won Sik Bae ) 대한통합의학회 2013 대한통합의학회지 Vol.1 No.2

Purpose : The purpose of this study is balanced exercise program according to the supporting surface any affect women`s ability to balance high heels. Methods : This study subjects were normal 20 females in their twenties. They were divided into stable supporting surface(n=10), unstable supporting surface(n=10), and they exercised three times a week for 5 weeks. In order to compare the difference of balance, the subjects were measured before and after training. Balance was examined using the balance master 7.0 version systems. Results : 1. There was significant difference values between pre-exercise and post-exercise of unstable surface group on the FORM-EO and FORM EC of MCTSIB and all of Unilateral Stance variables. 2. There was significant difference values between pre-exercise and post-exercise of stable surface group on the mean EPE, mean MXE, and mean DCL of LOS. 3. There was significant difference values between pre-exercise and post-exercise of unstable surface group of the rhythmic weight shift. 4. There was significant difference value in the slow directional control of rhythmic weight shift between groups after exercise. Conclusion : Training on stable supporting surface group and unstable supporting surface group improve balance.

유무기 안정제를 적용한 열팽창 마이크로 캡슐 제조공정 및 부품화 연구

하진욱(Jin Uk Ha),황예진(Ye Jin Hwang),정선경(Sun Kyoung Jeoung),강우(Woo Kang),곽성복(Sung Bok Kwak) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5