• Title/Summary/Keyword: Military Units

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A Study on Determining the Optimal Number of Equipment Spares under Availability Consideration (가용도를 고려한 장비의 최적 예비부품수 결정에 관한 연구)

  • Park Beom-Chang;Gang Seong-Jin
    • Journal of the military operations research society of Korea
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    • v.16 no.2
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    • pp.83-95
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    • 1990
  • This paper addresses the problem of determining the optimal number of spares for a system consisting of multi-item parts. In commercial sector, the cost minimization is mainly considered as an objective functions in most inventory models. However, in the military inventory systems, it is more stressed on maximizing the system availability than minimizing the system cost because the field commander always wants the system to be in perfect working condition to prepare against an emergence case. In this point of view, this paper develops an inventory model which decides the optimal number of spares by minimizing units short and simultaneously achieving a certain level of system availability. Solution algorithms are derived using the generalized Lagrange multiplier approach and marginal analysis approach. Sample data and output results are provided and sensitivity analysis is performed as the level of system availability changes in order to decide the optimal number of spares and availability in terms of economic sense.

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A Study on an Environmental Test Sequence for Electrical Units on Aircraft (항공기 전장품의 환경시험순서에 관한 연구)

  • Yang, Jung Ho;Kim, Yong Soo
    • Journal of Applied Reliability
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    • v.14 no.2
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    • pp.114-121
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    • 2014
  • An environmental test has been performed in order to improve the lifetime and reliability of the electrical units on aircraft. However, faults occurring in the field of aircraft have been difficult to predict and prevent, and new concepts for reliability testing are desired. Therefore, a composite reliability test sequence was proposed in the conventional studies. This study introduces test sequence guidelines based on relevant principles and considerations for electronic testing according to International Standard IEC-60068-1 and the United States Military Standard MIL-STD-810G. In addition, we analyze possible causes of failure using two-step QFD based on aircraft operation scenarios. Finally, the proposed test sequence can reproduce various and realistic failure modes for electrical units on aircraft.

An inquiry into the distribution and application plan of new-renewable energy in Military facilities (군 시설 신재생에너지 보급동향과 적용방향 고찰)

  • Kim, Chul;Kyung, Seo-Kyung;Cho, Woo-Seok;Oh, Myung-Won;Kim, Byung-Seon
    • 한국태양에너지학회:학술대회논문집
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    • 2009.04a
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    • pp.269-276
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    • 2009
  • South Korea having military power within the $10^{th}$ in world ranking is the biggest single institution among public institutions in Korea and comprises force of over seven hundred thousand soldiers. However, outworn equipments and efficiency problem have issued. So, this study is to search the distribution state of new-renewable energy and to analyze application plan on the basis of interview with a official in charge in military. Analysis process is the first, classify surveyed military facilities into troops and the geographical factor. Second, classify a scale and type of facilities that new-renewable energy is supplied. Third, find consideration facts on the basis of interview with a official in charge. On the results of the survey, new-renewable energy applied to the military facility is photovoltaic, solar heat, wind power and geo-thermal energy. Also, divide military into the army, navy, air force and marine, visit 14 units and analyze the official's opinion. This study will deduce LCCA(Life cycle cost analysis) considered expenses for the installation and maintenance, and will be basic research that suggest an appropriate new-renewable energy model in military.

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Utilization of Military Idle Land in the Border Region and Urban Regeneration: A Case Study of Cheorwon-gun, Gangwon-do (접경지역의 군 유휴지 활용과 도시재생: 강원도 철원군을 사례로)

  • Nayoung Lee
    • Journal of the Economic Geographical Society of Korea
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    • v.25 no.4
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    • pp.568-582
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    • 2022
  • This study identifies regional problems caused by the relocation and dismantlement of military units by the government's Defense Reform 2.0 and examines the current situation. This study provides policy implications for future regional development by discussing the use of military idle land in the border region and seeking how to revitalize the region through urban regeneration. In order to utilize and manage the military idle land, first, the mutually beneficial development of the military unit and the local community must be achieved through the establishment of governance between private, government, and military sectors. Second, review and improvement of laws and systems related to border regions and military idle lands should be accompanied. Third, the various ideas and policies that reflect the uniqueness of the border region must be established. Finally, this study provided implications for the efficient utilization and management of sustainable idle land by reflecting the specificity of the border region in the future.

A Study on Predicting Installation Scale of Photovoltaic Panels and Hydrogen Fuel Storage Facilities to Achieve Net Zero Carbon Emissions Exploiting Idle Sites of Military Bases (군부대 유휴부지를 활용한 탄소 순 배출량 제로 달성을 위한 태양광 패널 및 수소 연료 저장시설의 설치 규모 예측)

  • Donghak Moon;Jiyong Heo
    • Journal of the Korea Institute of Military Science and Technology
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    • v.27 no.1
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    • pp.8-14
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    • 2024
  • In this study, the scale of renewable photovoltaic(PV) panels and hydrogen fuel storage facilities required to achieve "net zero carbon emissions" in military facilities were predicted based on actual electricity consumption. It was set up to expect the appropriate installation size of PV panel and hydrogen fuel storage facility for achieving carbon neutrality, limited to the electricity consumption in the public sector, including national defense and social security administration in Yeongcheon. The experimental results of this paper are largely composed of two parts. First, representative meteorological factors were considered to predict solar power generation in the Yeongcheon area, and solar power generation was estimated through a multiple regression model using deep learning techniques. Second, the size of solar power generation facilities and hydrogen storage facilities in military bases was estimated with the amount of solar power generation and electricity consumption. As a result of this analysis, it was calculated that a site of 155.76×104 m2 for PV panels was needed and a facility capable of storing 27,657 kg of hydrogen gas was required. Through these results, it is meaningful to demonstrated the prospect that military units can lead the achievement of "carbon net zero 2050" by using PV panels and hydrogen fuel storage facilities on idle sites of military bases.

OPPORTUNISTIC REPLACEMENT POLICIES UNDER MARKOVIAN DETERIORATION

  • Chang Ki-Duck;Tcha Dong-Wan
    • Journal of the military operations research society of Korea
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    • v.4 no.1
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    • pp.113-123
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    • 1978
  • Consider a series system of two units, named 1 and 2, respectively. Two units are observed at the beginning of discrete time periods t=0,1,2, $cdots$ and classified as being in one of a countable number of states. Let (i, r) be a state of the system at time t, when the state of unit 1 is i and state of unit 2 is r at time t, Under some conditions, the opportunistic replacement policy that minimizes the expected total discounted cost or the average cost of maintenance is shown to be characterized by the control limits $i^{*}(r)$ (a function of r) and $r^{*}(i)$ (a function of i) : (a) in observed state (i, r), the optimal policy for unit 1 is to replace if $i{\ge}i^{*}(r)$ and no action otherwise; (b) in observed state (i, r), the optimal policy for unit 2 is to replace if $r{\ge}r^{*}(i)$ and no action otherwise. In addition, this paper also develops optimal policy in the finite time horizon case, where time horizon is fixed or a finite integer valued r.v. with known pmf.

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Survival Analysis of Battalion-Level Commanders(leaders) Using Big Data as Results of Brigade-Level KCTC Training - Focused on Infantry Battalion Defensive Operations - (여단급 KCTC 훈련 결과 빅데이터를 활용한 대대급 이하 지휘관(자)의 생존분석 - 보병대대 방어작전을 중심으로 -)

  • Jinseong Yun;Hoseok Moon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.27 no.1
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    • pp.94-106
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    • 2024
  • In this study, we conducted a survival analysis on battalion-level commanders(leaders), focusing on infantry battalion defensive operations using the big data of brigade-level KCTC(Korea Combat Training Center) training results. Unlike previous studies, we utilized the brigade-level KCTC training results data for the first time to conduct a survival analysis, and the research subjects were battalion-level commanders(leaders), which can affect the battle. At this time, the battle results were defined, and through cluster analysis, infantry battalions were divided into excellent, average, and insufficient units, and the difference in the survival rate of the commanders was analyzed through the Kaplan-Meier survival analysis. This provided an opportunity to objectively compare the differences between excellent and insufficient units. Subsequently, factors affecting the survival of commanders were derived using the Cox proportional hazard model, and it was possible to confirm the influencing factors from various angles by also using the survival tree model. Significance and limitations confirmed in the research process were presented as policy suggestions and future research directions.

A Feasibility Study of Autonomous Driving and Unmanned Technology of Self-Propelled Artillery, K-9 (K-9자주포의 자율주행 및 자주포 무인화 기술의 타당성 검토)

  • Koo, Keon-Woo;Yun, Dong-Ho
    • The Journal of the Korea institute of electronic communication sciences
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    • v.16 no.5
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    • pp.889-898
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    • 2021
  • Currently, due to the demographic cliff phenomenon in Republic of Korea, A serious defense vacuum could occur due to the lack of South Korean military's personal strength. As a result, The South Korean military has a possibility to implement the polices the prepare for military provocations and preemptive strikes by the North Korean military while resolving the South Korean defense vacuum caused by the shrinking population. It seems like that the only way for the South Korean military to solve the shortage of personal strength due to the population decline is to reduce the number of Mechanized Units(MU) other than, infantry and automate, and autonomous driving the weapons system of the Mechanized Units(MU). In this paper, we propose the use of the virtual autonomous driving of the self propelled artillery K-9's in self selection of the position and occupation of position and self positioning in the position. At the same time in this paper, the self propelled artillery K-9 model robot is used to simulate and the explain about the operation method, necessity and feasibility in the self propelled artillery K-9. In addition, this paper predicted the problems that would arise if the South Korean military deployed autonomous driving self propelled K-9, in real combat.

Analysis of scientific military training data using zero-inflated and Hurdle regression (영과잉 및 허들 회귀모형을 이용한 과학화 전투훈련 자료 분석)

  • Kim, Jaeoh;Bang, Sungwan;Kwon, Ojeong
    • Journal of the Korean Data and Information Science Society
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    • v.28 no.6
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    • pp.1511-1520
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    • 2017
  • The purpose of this study is to analyze military combat training data to improve military operation and training methods and verify required military doctrine. We set the number of combat disabled enemies, which the individual combatants make using their weapons, as the response variable regarding offensive operations from scientific military training data of reinforced infantry battalion. Our response variable has more zero observations than would be allowed for by the traditional GLM such as Poisson regression. We used the zero-inflated regression and the hurdle regression for data analysis considering the over-dispersion and excessive zero observation problems. Our result can be utilized as an appropriate reference in order to verify a military doctrine for small units and analysis of various operational and tactical factors.

Factors Influencing Military Leisure Activities on Life Satisfaction Using Path Analysis (경로분석을 이용한 군대의 여가활동 유형이 생활만족도에 미치는 요인)

  • Kim, Ho-Won;Kim, Dong-Hyun;Kim, Nam-Song
    • Journal of Digital Convergence
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    • v.11 no.11
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    • pp.471-478
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    • 2013
  • This study has been conducted on soldiers' leisure activities and their military life satisfaction using path analysis. The survey for the research had been done with military personnel serving at two units, located in north Gyeonggi province and south Gyeonggi province, using 856 questionaires for eight weeks beginning september, 2011. The results showed that military life contentment was found to be influenced significantly by the factors such as physical symtoms, depression, and social support. with this results, the hope is that they could enhance military life satisfaction by developing and introducing various leisure programs which could help relieve depression, physical symtoms, and build social support among soldiers.