원료의약품 Amlodipine Camsylate 합성공정에서 교반속도에 따른 폭주반응 위험성 평가

박동하(Dong Ha Park),김철상(Cheol Sang Kim),김상중(Sang Jung Kim),전진우(Jin Woo Jeon),박교식(Kyo Shik Park) 한국해군과학기술학회 2023 Journal of the KNST Vol.6 No.2

Fire and/or explosion accident often occurs during chemical manufacturing process of active pharmaceutical ingredients (API) by a function of heat medium, stirring rate, feed rate of raw material, etc. In this study, an experiment was conducted on heat generation according to the stirring rate to find out the risk in the chemical reaction stage. Thermal behavior was investigated using a reaction calorimeter for products synthesized in the actual production of API. The risk was predicted by comparing the maximum temperature of the synthesis reaction that can generate heat due to the influence of the stirring rate in the reaction process at commercial scale with the maximum temperature based on the technical basis. With these results, safety measures to control the risk of runaway reaction due to heat generation were proposed by applying them to the commercial reactor.

3 축 가속도계 기반 반려견 자세 인지

박동하(Park Dong Ha),김민지(Kim Min Ji),김서빈(Kim Seo Bin),정초록(Jung Cho Rok),김동호(Kim Dong Ho) 한국정보과학회 2017 한국정보과학회 학술발표논문집 Vol.2017 No.06

병행 침입에서의 탐지 시스템 모델

박동하(Park Dong Ha),전문석(Jun Moon Seog),이철희(Lee Chul Hee) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.1A

현재까지 대부분의 침입탐지 시스템은 하나의 로그인 세션에서 수행된 명령어를 분석해 침입을 탐지하였다. 그러나 좀더 실력 있는 침입자라면 IDS에 탐지되지 않기 위해 여러 로그인 세션에서 병렬 적으로 명령을 수행한다. 이 경우 침입탐지 시스템이 침입 행위를 탐지키 위해서는 병렬 적으로 수행된 명령들을 순차적으로 재구성하여 침입 유무를 판별해야만 한다. 본 논문에서는 각 명령어를 클래스 형태로 분류하고 명령어들 사이의 종속성을 이용해 재구성함으로써 좀더 명확한 침입의 유무를 판별할 수 있게 한다. 또한 관리자의 의사 결정의 단계를 추가시킴으로써 좀더 유연한 시스템을 구성 할 수 있게 하였다.

대장 및 직장손상의 임상적 고찰

박동하(Dong Ha Park),최영관(Young Kwan Choi),문덕진(Doug Jin Moon),박주섭(Ju Sup Park) 대한외과학회 1986 Annals of Surgical Treatment and Research(ASRT) Vol.31 No.6

유방의 섬유낭종증에 있어서 근상피세포의 변화에 대한 형태학적 연구

박동하(Dong-Ha Park),박주섭(Ju-Sup Park),이민철(Min-Chul Lee),조규혁(Kyu-Hyuk Cho) 대한외과학회 1986 Annals of Surgical Treatment and Research(ASRT) Vol.31 No.5

Go 와 C++TBB 의 병렬처리 비교

박동하 ( Dong-ha Park ),문봉교 ( Bong-kyo Moon ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.1

Applying concurrent structure and parallel processing are a common issue for these day’s programs. In this research, Dynamic Programming is used to compare the parallel performance of Go language and Intel C++Thread Building Blocks. The experiment was performed on 4 core machine and its result contains execution time under Simultaneous Multi-Threading environment. Static Optimal Binary Search Three was used as an example. From the result, the speed-up of Go was higher than the number of cores, and that TBB was close to it. TBB performed better in general, for larger scale, Go was partially faster than the other

외측 상완 피판 : 그 응용과 우수성

박명철,박동하,이병민,김관식,Park, Myong-Chul,Park, Dong-Ha,Lee, Byeong-Min,Kim, Kwan 대한미세수술학회 1996 Archives of reconstructive microsurgery Vol.5 No.1

Lateral arm flap has been used for the reconstruction of the various defects in hand, head and neck region. This flap is highly dependable as a free flap because of its thin flap thickness, constant vascular anatomy and possibility of osteocutaneous flap and fascial flap. Recently, many authors tried extended approach for vascular pedicle and distal flap extension for bigger defects. In this study, we review previous articles and 14 cases used lateral arm flaps for coverage of the varying defect on head and neck, upper and lower extremities succesfully. In conclusion, lateral arm flap has constant anatomical structure and can overcome the disadvantages such as short pedicle length and limited flap size, then the range of its application can be very widened.

입천장성형술 시 발생한 골 노출부의 피복을 위한 협지방대 유경피판의 경험

김치선,박명철,박동하,Kim, Chee-Sun,Park, Myong-Chul,Park, Dong-Ha 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.1

Purpose: The primary goal of palatoplasty is to enable normal speech with harmonious growth of face. Some children who had palatoplasty display typical findings of transverse maxillary deficiency requiring orthodontic widening of the maxilla. Levi (2009) described a cleft palate repair coupled with pedicled buccal fat pad flaps to cover bone exposed areas of the hard palate. Hence we report clinical experiences of cleft palate repair using pedicled buccal fat pad flap. Methods: Four Veau class II and a Veau class I cleft palate patients underwent palatoplasty with buccal fat pad flap by single surgeon from April 2009 to August 2009. Two patients received 2-flap palatoplasty and three patients 1-flap palatoplasty, respectively. After the cleft palate repair, sharp mosquito scissors was placed in the superior buccal sulcus just lateral to the maxillary tuberosity and inserted directly through the mucosa resulting in buccal fat pad extrusion. The elevated flap was moved to cover mucoperiosteal defect in hard palatal area. Results: Five patients underwent primary palatoplasty using buccal fat pad flap. Flap harvest and inset took on average 9 minutes per flap. Mucosal epithelization took 18 days on average. No patients had complications related to the buccal fat pad flap. Conclusion: Buccal fat pad pedicled flap has significant potential to function as an added vascularized tissue layer in cleft palate repair and we can expect better growth of maxilla with this method although longer duration of follow-up was unavailable.

에너지효율주택에 대한 선호와 수요:

김준형(Jun-Hyung Kim),박동하(Dong-Ha Park),최명섭(Myoung-Sub Choi),이상영(Sang-Young Lee) 한국주택학회 2017 주택연구 Vol.25 No.3

최근 정부는 제로에너지주택 등 에너지효율주택의 보급을 본격적으로 추진하고 있다. 그러나 에너지효율주택에 대한 소비자들의 인식이나 선호, 그리고 수요를 면밀하게 파악하려는 노력은 거의 이루어지지 않고 있다. 이에 본 연구는 서울에 거주하고 있는 484명을 대상으로 면접설문을 진행, 환경에 대한 인식 수준, 제로에너지주택에 대한 관심, 그리고 제로에너지주택에 대한 입주의사와 지불용의액 등을 살펴보았다. 분석결과 시민들 내에서 제로에너지주택의 필요성 및 입주의사는 70% 이상의 수치로 높게 형성되었다. 이는 향후 제로에너지주택에 대한 시장이 충분히 형성될 수 있음을 시사한다. 그러나 이 수요는 가격에 민감하게 반응하고 있었다. 에너지가격이 상승하거나 입주에 따른 추가비용이 발생할 때 입주의사가 큰 변화를 보인다는 점 등이 이를 입증한다. 구체적으로 에너지비용 절감의 혜택에 기초해 추가로 부담할 수 있는 비용의 규모는 임대가격 기준 16%, 매매가격 기준 20%이다. 그리고 국내 에너지효율주택의 입주의사는 환경운동에 대한 관심, 에너지효율주택에 대한 인식 등과 밀접히 연계되어 있다. 이는 에너지효율주택에 대한 적극적인 교육이나 홍보, 마케팅을 통해 관련 시장을 활성화시킬 수 있음을 시사한다. The Government has expedited the policy to equip new buildings with energy-efficient system, in particular the Zero-Energy House (ZEH), which uses passive technologies reducing the building energy consumption and active technologies utilizing the New and Renewable energy source. However, little efforts have been made to understand the preference, demand, and willingness to live in or to pay for the ZEH. This study conducted face-to-face interviews covering 484 residents in Seoul in order to investigate perceptions toward environment, interests in the ZEH, and willingness to reside in and to pay for the ZEH. The findings of this study are as follows: 1) There is abundant demand for the ZEH among households. More than 70% of the respondents agree on the necessity for the ZEH, and have willingness to live in the ZEH. 2) This demand for the ZEH is sensitive to its price, meaning that the respondents change their willingness considerably when the price of energy rises or when they have to pay additional costs for the ZEH. In detail, the degree to which they are willing to pay more for the ZEH over the non-energy efficient houses amounts to 16% of the rental price and 20% of the purchase price. 3) The willingness to live in the ZEH is strongly related to the interests in the environment and to the perception toward energy-efficient housing. This implies that the ZEH market can grow significantly through the active education, campaigning and marketing efforts.

실물옵션이론을 이용한 다계층 MBS의 감정평가

조명환(Myeong-Hwan Cho),박동하(Dong-Ha Park),전재범(Jae-Bum Jun) 한국부동산정책학회 2023 不動産政策硏究 Vol.24 No.1

본 연구는 주택가격이 불확실하게 변화할 때 조기상환 위험을 내포한 다계층 MBS(CMOs)를 활용하여 실물옵션이론에 기반한 감정평가모델을 제안하고 사례를 고찰한 후 관련 시사점을 제안하였으며 그 결과는 다음과 같다. 1) 조기상환 옵션의 행사가격이 상승할수록 조기상환 위험의 발생시기는 지연되고 조기상환 위험의 가치는 줄어든다. 2) 주택가격의 변동성이 커질수록 조기상환시기는 앞당겨졌으며 조기상환 위험의 가치는 증가한다. 3) 대출금리가 낮아질수록 조기상환 위험은 감소하는데 이는 본 연구에서 조기상환이 주택가격의 불확실성으로부터 기인함을 가정했기 때문이다. 결국, MBS의 발행자는 주택가격의 변화와 시장금리 등을 토대로 CMOs의 가격을 조절하여 자본시장이 용인하는 수준 내에서 조기상환 위험을 합리적으로 대응하기 위한 전략을 세울 필요가 있다. This paper shows a appraising model based on real option theory with CMOs, Multi-Layered MBS, that involves prepayment risk when housing prices fluctuate with uncertainty, analyzes and considers the results, and proposes related implications. And, the result is as follows. 1) As the strike price(the sale price of the house) of an prepayment option increases, the occurrence of the prepayment delays and the value of the prepayment risk reduces. 2) As the volatility of housing prices increase, the prepayment period advances, and the value of the prepayment risk increases. 3) The lower the loan interest rate, the lower the prepayment risk, because this paper assumes that prepayment is caused by housing prices’ uncertainty. Finally, the issuer of MBS needs to set up a strategy to reasonably respond to the prepayment risk within the level tolerated by the capital market by adjusting the CMOs’ price based on changes in housing prices and market interest rates.