• 한국군사과학기술학회지
• /
• 제15권3호
• /
• pp.306-314
• /
• 2012

This paper proposes a new system to maximize efficiency of Air Base Protection Operations through the development of location identification software. The Wibro-based location identification system for Air Base Protection Force offers Blue Ground Force digitalized character message which is not exposed to enemy. Also, it is possible to automatically provide the location of Blue Ground Force to Air Base Ground Operations Center. The test result proves that this system is very helpful when Air Base Protection Force executes Air Base Protection Operations.

• 한국국방경영분석학회지
• /
• 제2권1호
• /
• pp.177-184
• /
• 1976

As the organizational size of a military service or business increases and its management becomes complex, the success in its management depends less on static type of management but more on careful, dynamic type of management. In this thesis, an operations research technique is applied to the problems of determining optimal air traffic control rule and of optimal capacity of air base for a military air base. An airport runway is regarded as the service facility in a queueing mechanism, used by landing, low approach, and departing aircraft. The usual order of service gives priority different classes of aircraft such as landings, departures, and low approaches; here service disciplines are considered assigning priorities to different classes of aricraft grouped according to required runway time. Several such priority rules are compared by means of a steady-state queueing model with non-preemptive priorities. From the survey conducted for the thesis development, it was found that the flight pattern such as departure, law approach, and landing within a control zone, follows a Poisson distribution and the service time follows an Erlang distribution. In the problem of choosing the optimal air traffic control rule, the control rule of giving service priority to the aircraft with a minimum average waiting cost, regardless of flight patterns, was found to be the optimal one. Through a simulation with data collected at K-O O Air Base, the optimal take-off interval and the optimal capacity of aircraft to be employed were determined.

• 한국국방경영분석학회지
• /
• 제22권1호
• /
• pp.30-42
• /
• 1996

This study deals with an optimal firecar location and allocation models under uncertain enemy attack at the airforce base. It allocates just one firecar on the runaway and the other firecars on the headquarter of firecar company in usual situation. It is possible for several facilities at the airforce base to be attacked simultaneously by missiles enemy air attacker, other things under uncertain enemy attack. We formulate two stochastic LP location-allocation models to deal with uncertainty. One model is to locate all firecars on one site like present situation. We generate a new firecar location with a weighted average method. We call this model "centralized allocation model". The other model is to distribute firecars on several possible sites. We call this model "distributed allcoation model". Finally, we compare two models with computer experimentations on 8 airforce bases.on 8 airforce bases.

• 한국국방경영분석학회지
• /
• 제35권3호
• /
• pp.1-15
• /
• 2009

현재 공군은 중앙창에서 국내 조달물자와 해외 도입물자를 공급받아 보관하고 전국 각 기지로 수송하여 기지별로 필요한 물자를 공급하고 있다. 이러한 물자를 중앙물자라고 부르며 항공, 철도, 육로 등 다양한 방편을 이용하여 수송한다. 이 중 항공이 차지하는 비중은 전체 물자의 10% 정도이며, 그 물량이 날로 증가하고 있다. 이렇듯 군에서 항공수송의 비중이 점점 커져가고 있지만, 항공수송을 활성화시키기 위한 수요예측이나 노선설계와 같은 연구는 매우 미흡한 실정이다. 본 연구는 회귀분석을 통하여 항공수송에 미치는 주요 요인과 영향력을 검증하였고 산출된 회귀모형식은 군 항공화물수요 예측에 있어 유용한 자료가 될 것이다.

• 한국CDE학회논문집
• /
• 제3권3호
• /
• pp.168-176
• /
• 1998

This paper deals with an application on the mould machining of air intake hose product by using 3-dimensional parametric modeling techniques. The detailed domain is the 3-dimensional product with similar shapes and different sizes which needs too much working time for preparation of modeling or machining due to making a trial and errors repeatedly. Decision making rules for selection of modeling order and technique, and for calculation of cutting conditions, and for determination of sequence and method concerning machining operations are required by interview of expert engineers in the field. The developed expert system of modeling and machining is programmed by using a user programming language under the CAD/CAM software of the Personal Designer. The developed system that aids a mould engineer who is working in the modeling and machining section which deal with air intake hose product provides strong and useful capabilities.

• 한국국방경영분석학회지
• /
• 제35권2호
• /
• pp.1-14
• /
• 2009

전시 공군은 각 지역에 거점부대를 선정하여 해당 지역에서 동원되는 품목별 물자를 인수하고, 물자가 부족한 지역의 거점부대에 잉여물자를 분배하여 전체 부대가 일정한 군수지원 수준을 유지할 수 있도록 계획하고 있다. 또한, 지역 거점부대는 해당지역에 주둔하고 있는 군소 운영부대들에 대한 DC(Distribution Center)의 역할도 담당하여 지역에서 동원되는 물자들과 타 지역 거점부대로부터 인수한 해당 지역 부족물자들을 군소운영부대에 분배한다. 하지만, 전시 동원물자 수송은 물자가 많이 동원되는 지역의 거점부대가 물자가 적게 동원되는 부대로의 분배 및 수송을 책임지기 때문에 동원물자들의 생산특성에 따라 지역 거점부대별 수송부담의 불균형과 다빈도 수송으로 인한 수송 자산(병력, 수송수단)의 낭비를 가져오게 된다. 또한, 공군본부나 군수사령부와 같은 상급부대는 전체적인 동원물자의 분배와 수송을 효율적인 방향으로 조정 통제하는데 대한 어려움이 있다. 본 연구에서는 이러한 어려움을 해소하기 위해 특정지역에 TC(Transfer Center)를 설치하여 물자를 분배하고 수송하는 방법론을 제시고자 한다.

• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회 2003년도 추계학술대회 및 정기총회
• /
• pp.239-242
• /
• 2003

The supply chain of the airline industry includes multiple airline companies, travel agencies and customers. Various air fares are offered by travel agencies. The travel agencies grant deposit to the airline company in advance and preoccupy seats with deep discount, which called group-discount-ticket. The group-discount-ticket offers the lowest air fare but it does not base on real demand. So the information flow generated by group-discount-ticket can cause the information distortion in airline supply chain. This study analyzes the bullwhip effect in the airline industry. A mathematical model is formulated and managerial suggestions is provided.

• Journal of Korean Neurosurgical Society
• /
• 제54권2호
• /
• pp.142-144
• /
• 2013

A 49-year-old female with a history of several neurosurgical and otolaryngologic procedures for occipital meningioma and cerebrospinal fluid leaks was diagnosed with pneumocephalus after a one hour flight on a domestic jet airliner. Despite multiple operations, the air appeared to enter the cranium through a weak portion of the skull base due to the low atmospheric pressure in the cabin. The intracranial air was absorbed with conservative management. The patient was recommended not to fly before a definite diagnostic work up and a sealing procedure for the cerebrospinal fluid leak site had been performed. Recent advances in aviation technology have enabled many people to travel by air, including individuals with medical conditions. Low cabin pressure is not dangerous to healthy individuals; however, practicing consultant neurosurgeons should understand the cabin environment and prepare high risk patients for safe air travel.

• Industrial Engineering and Management Systems
• /
• 제12권3호
• /
• pp.281-287
• /
• 2013

In this paper, we introduce a roots method that uses the roots inside the unit circle of the associated characteristics equation to evaluate the steady-state system-length distribution at three epochs (pre-arrival, arbitrary, and post-departure) and sojourn-time distribution in GI/PH/1 queueing model. It is very important for an air base to inspect airplane oil because low-quality oil leads to drop or breakdown of an airplane. Since airplane oil inspection is composed of several inspection steps, it sometimes causes train congestion and delay of inventory replenishments. We analyzed interarrival time and inspection (service) time of oil supply from the actual data which is given from one of the ROKAF's (Republic of Korea Air Force) bases. We found that interarrival time of oil follows a normal distribution with a small deviation, and the service time follows phase-type distribution, which was first introduced by Neuts to deal with the shortfalls of exponential distributions. Finally, we applied the GI/PH/1 queueing model to the oil train congestion problem and analyzed the distributions of the number of customers (oil trains) in the queue and their mean sojourn-time using the roots method suggested by Chaudhry for the model GI/C-MSP/1.

• 한국경영과학회지
• /
• 제8권2호
• /
• pp.9-25
• /
• 1983

A new approach to cross impact analysis using probabilistic system dynamics(PSD) is presented in this article. The previous models using PSD consist of system dynamics models as a basis which are interacting with cross impact analysis (CIA) sectors. In this model, the policy impact analysis part is separated from the CIA sectors and is constituted an independent subsectors of the model. The policy subsector is designed to separate the policy impact and provide feedback both to the system dynamics base model and cross impact analysis sectors. The new technique is applied to the forecasting, assessment and policy formulation of air pollution in Seoul metropolitan area in 2,000. The results show that the new tool consider policy effects more effectively than the previous PSD models.