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소요제기 단계에서 유사무기체계 고장 수리 정보를 활용한 함정 OO체계 운용가용도 추정 방안
이수중 한국신뢰성학회 2018 한국신뢰성학회 학술대회논문집 Vol.2018 No.10
무기체계의 운용가용도는 전투준비태세를 평가하는 중요한 성능 지표로서 소요제기 단계에서 목표값이 제시되어야 한다. 운용가용도는 통상 무기체계의 임무 및 전투시나리오를 기반으로 작성한 OMS/MP를 근간으로 산출하고 있으나, 일부 사업의 경우 OMS/MP가 소요군의 충분한 검토와 협조 없이 짧은 선행 연구 기간을 통해 작성되고 있어 이를 기반으로 산출된 운용가용도의 신뢰성 문제가 제기될 수 있다. 본 연구에서는 소요제기 단계에서 운용중인 유사무기체계의 고장 수리 정보를 활용하여 실장비 운용, 정비 및 지연 시간을 반영한 운용가용도 추정 방안을 제시하고, 사례로 함정 OO체계에 대한 운용가용도를 추정하였다.
항경련제가 혈청 Carnitine 및 간 기능에 미치는 영향
이수중(Soo-Jung Lee),김종완(Jong-Wan Kim),황경태(Kyung-Tai Whang) 대한소아신경학회 1993 대한소아신경학회지 Vol.1 No.2
We measured the serum carnitine levels by means of radioisotopic assay in epileptic children receiving a various antiepileptic drugs, and assessed the effects of antiepileptic drugs on serum carnitine level together with a correlation between serum carnitine level and duration of treatment, and value of liver function. The study included 97 epileptic patients(54 males, 43 females ; ages 5-23 years) who were divided into four antiepileptic drug-treated groups : valproic acid(VPA) monotherapy, carbamazepine monotherapy, valproic acid polytherapy, and other antiepileptic drugs without VPA, and a control group of 52 children(33 males, 19 females ; ages 8-19 years). The results were as follows: 1. The serum levels of total and free carnitine were significantly reduced in the patients of VPA mono- and polytherapy groups, compared with the control group. The reduction was more significant in the patients of VPA polytherapy group than in those of VPA monotherapy group. 2. The number of patients whose serum level of total and free carnitine reduced by > 2SD below the mean of control group was 3 of 18 patients in VPA monotherapy group and 6 of 20 patients in VPA polytherapy group, respectively. 3. The duration of treatment was not correlated with the serum levels carnitine in both VPA mono- and polytherapy groups. 4. The blood level of ammonia was inversely correlated with the serum level of carnitine in both VPA mono- and polytherapy groups. It can be concluded that reduction of serum carnitine should be considered in epileptic patients taking VPA therapy, although the clinical symptoms of carnitine deficiency were not found in patients of our study, and the measurement of blood ammonia may be the useful parameter to predict hypocarnitinemia.
A study on the Optimal Combat Exchange Components Selection Method
전동주,이수중,이승률,임재훈 한국산업경영시스템학회 2017 한국산업경영시스템학회 학술대회 Vol.2017 No.추계초록
The navy that operates a large size of weapon systems, relatively a small quantity of, in order to minimize the loss of war potential caused by the breakdown of weapon system during long-term naval area of operation assigns allowance parts such as Maintenance Float (M/F), Combat Exchange Components, Concurrent Spare Parts (CSP) and so on to each unit and makes them use the allowance parts. Among them, Combat Exchange Components is being calculated in accordance with heuristic method because there is no standardized method to calculate it differently from Maintenance Float and Concurrent Spare Parts. In this article, more systematic calculation optimization method of it is suggested by selecting the optimum Combat Exchange Components in accordance with integer programming and presenting it, comparing it with the list of Combat Exchange Components calculated by actual heuristic method.