MND-AF를 활용한 운용개념기술서(OCD) 및 운용요구서(ORD)에 대한 보완 연구

차승훈,장재덕,이혜진,최상욱,유제상,Cha, Seung Hun,Jang, Jae Duck,Lee, Hye Jin,Choi, Sang Wook,Yoo, Jae Sang 한국시스템엔지니어링학회 2020 시스템엔지니어링학술지 Vol.16 No.2

Modern weapon systems are composed of complex systems(System of Systems) and require a complex and advanced operational concept that performs missions through interoperability with various weapon systems. In order to derive the operational concept of the weapon system that the military wants to acquire (i.e., single mission, component operation, Joint and Alliance operations), it is necessary to identify the system related to the weapon system, environmental factors and restrictions of the weapon system to be developed. Through the derivation of the operational concept, the weapon system acquisition agency can reasonably and accurately extract various and complex requirements. In this paper, we propose a complementary method of using MND-AF to OCD and ORD required in weapon system acquisition process. MND-AF can increase the understanding and consensus of business stakeholders (users, acquirers, developers, etc.) by showing the results of weapon system analysis from various perspectives. We compare the items in the standard form of OCD and ORD with the MND-AF outputs.

치커리 종근의 연화재배 시 전처리 방법에 따른 치콘 생육 및 품질 특성

차승훈 ( Seung Hun Cha ),임규 ( Gyu Im ),김호철 ( Ho Cheol Kim ),유성오 ( Sung Oh Yu ),배종향 ( Jong Hyang Bae ) 원광대학교 생명자원과학연구소 2007 생명자원과학연구 Vol.29 No.-

현장소통 - 싱가포르 Marina Coastal Expressway(Marina South 1) C482 Project 현장

임재승,차승훈,Im, Jae-Seung,Cha, Seung-Hun (사)한국토질및기초기술사회 2011 지반과 기술 Vol.8 No.1

항성풍 거품 내에서의 초신성 잔해의 동역학적 구조

최승언,차승훈,구본철,Choi, Seung-Eon,Cha, Seung-Hun,Gu, Bon-Cheol 한국천문학회 1996 天文學論叢 Vol.11 No.1

We have performed the high resolution computer simulation with 1D spherical hydrodynamic code in order to study the dynamical evolution of supernova ejecta interacting with a pre-existing fast wind structure. The fast wind structure has been calculated with $M_{in}=3{\times}10^{-6}M_{\odot}yr^{-1}$ and ${\upsilon}_{in}=1000km/sec$, which velocity is higher than the critical velocity relating to the initial radiative cooling. The fast wind becomes initially adiabatic. After a shell formation time of ${\sim}4000yrs$, the wind becomes radiative cooling at the shell zone, forming a thin dense radiative shell and an adiabatic wind bubble afterward. When supernova explodes in the wind center at 20,000yrs after the wind evolves, the supernova ejecta, which has a dense distribution of ${\rho}{\propto}r^{-n}$(here we have n = 9), interacts initially with, the understood wind zone, producing forward and reverse shocks. The reverse shock heats the supernova ejecta and its temperature increases. In this study, as the mass of the supernova ejecta is larger than that of the wind shell ($M_{ej}=5M_{\odot}$, $M_{sw}=2M_{\odot}$), we can conform two shell structures: an outer shell by the supernova ejecta and a secondarily shocked wind shell by it. The secondarily shocked wind shell should accelerates in this case to be R-T unstable, consequently producing the knots.

변성퇴적암류로 구성된 대규모 암반사면의 붕괴원인 분석에 관한 사례 연구

박부성(Boo Seong Park),조현(Hyun Jo),차승훈(Seung Hun Cha),이기환(Ki Hwan Lee) 한국암반공학회 2006 터널과지하공간 Vol.16 No.6

복잡한 지층 및 지질구조 특성을 보이는 대규모 절취사면의 경우 설계 시의 조사 및 시험의 한계성 등으로 인하여 지반특성파악 및 설계정수의 산정이 어려워 시공 중 사면활동이 빈번하게 발생하고 있다. 이러한 경우 시공 중 절취상태에서 지반특성에 부합된 최적의 조사 및 분석 과정을 통하여 합리적인 대책방안을 강구해야 한다. 본 연구에서는 변성퇴적암류로 구성된 현존 국내 최대 규모의 대절토사면 (연장 520 m, 최대절취고 약 122 m, 최대법면길이 약 212 m)을 대상으로, 활동이력분석과 시공 중 지반조사를 통하여 사면의 붕괴원인분석에 관한 시공사례연구를 실시하였다. 원설계 시 대상사면의 경사는 발파암 기준 1:0.7을 적용하여 일부 시공하였으나 절취과정에서 지질요인, 강우 등 안정성을 저해하는 제반 요인에 의하여 다수의 지반활동이 발생하였으며, 계속적인 지반활동으로 인하여 대규모 산사태가 예상되는 매우 위험한 지반상태를 나타내고 있어, 이에 총 3차의 설계변경을 통해 사면의 장기 안정성을 확보하였다. 이러한 사례연구를 통하여, 본 지반조건과 유사한 지질 및 불연속면 특성을 나타내는 암반사면에 대한 안정성 분석, 평가 및 대책방안 수립을 위한 참고 자료가 되기를 기대한다. For the design of large scale rock slope which has complex formations and geological structures, generally, insufficiency of geotechnical investigations and laboratory tests are the main factors of slope failures during construction. In such case, remedial measures to stabilize slope should be selected and applied through reliable investigations and analysis considering the geotechnical characteristics. The rock slope of this study, one of the largest cut slopes in Korea with a length of 520.0 m and maximum height of 122.0 m, consists of metasedimentary rocks. And a case study on the causes of large-scale rock slope failure was carried out by analysis of landslides history and site investigations during construction. When the slope with the original design slope of 0.7:1.0 (H:V) was partially constructed, the slope failure was occurred due to the factors such as poor conditions of rocks (weathered zone, coaly shale and fault shear zone), various discontinuities (joints, foliations and faults), severe rain storm and so on. The types of failures were rockfall, circular failure, wedge failure and the combination of these types. So, the design of slope was changed three times to ensure long-term slope stability. This paper is intended to be a useful reference for analyzing and estimating the stability of rock slopes whose site conditions are similar to those of this study site such as geological structures and geotechnical properties.

위상배열 레이더에서의 비선형 정보연관 추적 방법 및 성능 비교

이경민(Lee Kyung-Min),나재호(Na Jae-Ho),차승훈(Cha Seung-Hun) 대한전기학회 2010 정보 및 제어 심포지엄 논문집 Vol.2010 No.10

본 논문에서는 위상배열 레이더의 비선형 정보연관 방법들을 제시하고, 이에 대한 성능을 비교분석한다. 위상배열 레이더는 신속한 빔 조향으로 탐색과 추적을 동시에 수행할 수 있는 다기능 레이더 시스템이다. 빔 폭 내에 히트(hit)들이 존재하는 상황에서 탐색 중 추적을 수행하기 위한 방법으로 nearest neighbor standard filter (NSSF)와 probabilistic data association (PDA) - 정보연관 방법을 적용하고, 비선형 추정을 풀기 위해서 extended kalman filter (EKF)와 sequential monte carlo (SMC)의 방법으로 접근하였다. 위상배열 레이더 모델에서 수행되는 비선형 정보연판 방법들의 성능을 몬테카를로로 분석하였다.

임신중 발생한 포진상 농가진

이승필(Seong Pil Lee),홍성진(Seong Jin Hong),오수미(Su Mi Oh),김흥곤(Heung Gon Kim),차승훈(Seung Hun Cha) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.8

Impetigo herpetiformis is a rare pustular eruption that may be seen in late pregnancy. It is associated with severe maternal and fetal complications in case of misdiagnosis and delayed treatment. The patient was a 25-years-old multigravida with psoriasis in her past history. At 20weeks gestation, she had been developed erythematous scaly annular patchs with papules and pustules on inner thigh. At 37weeks' gestation, the patient was suffered from a severely pruritic pustular rash with fever and leukocytosis. The skin of the affected areas was biopsied and showed intraepidermal pustular abscess with a neutrophilic infiltrate. Treatment commenced with intravenous fluids, antibiotics, systemic prednisone, steroid creams, and phototherapy(UVB) under the careful fetal well being monitoring. Cesarean section was done due to fetal distress, and a normal healthy male infant was delivered, following which the patient's condition improved rapidly.

자화-생물처리에 의한 염색폐수의 처리

이선하,차승훈,김재현 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(A)

The purpose of this study is to investigate treatment efficiency in dyeing wastewater treatment by the high rate aeration system(HRA) and a combination of the HRA with manetized wastewater treatment system(MWS). At the hydraulic retention time of 16hr, 24hr, 30hr, BOD removal efficiencies of HRA system were 93%, 96% and 98%, combination of the HRA with MWS system were 94%, 96.8% and 98.2%, resoectively. In case of COD, at the hydraulic retention time of 16hr, 24hr, 30hr, COD removal efficiencies of HRA system were 66%, 77.1% and 83.1%, combination of the HRA with MWS system were 70.2%, 80.1% and 86.6%, resoectively. The comparison of the HRA and combination of the HRA with MWS, effluent BOD of the former was 22.7㎎/ℓ and the latter was 19.4㎎/ℓ, therefore biological treatment efficiency identified to increase by the MWS

Vibrio vulnificus 세포용해소에 의한 마우스 독혈증시 혈당의 변화

이상원,박석돈,차승훈 대한피부과학회 2000 大韓皮膚科學會誌 Vol.38 No.9

Background: Vibrio(V.) vulnificus is a pathogenic, marine, halophilic, gram-negative bacillus which causes fulminant septic shock. Shock can be complicated by occurrence of hypoglycemia, which is caused by an unbalance between glucose production and consumption. Metabolic changes, especially glucose metabolism, in septic shock caused by V. vulnificus are not well clarified yet. Objective: Our purpose was to investigate the changes of blood sugar level after intravenous administration of V. vulnipcus cytolysin which is known to be a major virulent factor for elucidating pathogenesis of septic shock. Methods: After administration of the lethal dose(8 hemolytic units)of V. vulnificus cytolysin through mouse tail vein in non-fasting and fasting group, we obtained blood samples from heart according to time courses of every thirty minutes. We measured whole blood glucose level using commercially available blood glucose meter. Results: The level of blood glucose increased until 90 minutes, began to decrease at 120 minutes, and fell to baseline at 360 minutes in non-fasting mouse group. In fasting group, although elevation of blood glucose level was not observed in early stage of toxemia, hypoglycemia was nearly concordant with non-fasting group in late stage of toxemia. Conclusion: Hypoglycemia should be checked in patients with V. vulnificus sepsis. Failure to recognize and treat the hypoglycemia may contribute to the prognosis of these patients.