• Journal of Korean Society of Industrial and Systems Engineering
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• v.13 no.21
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• pp.111-117
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• 1990

This paper treats the problem to schedule for train with low transit priority so as to maximizing the number that can be sent during given time without interfering with the fixed schedule for train with high transit priority in a track. We transform the this problem into Time-Expanded Network without traverse time through application of Ford-Fulkerson Model, develop a TENET GENerator(TENETGEN) and obtain the data of TENET using developed TENETGEN. Finally, we seek the optimal solution to these data with Dinic's Maximal-Flow Algorithm and examine the availability of our procedures in personal computer.

• 연구논문집
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• s.22
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• pp.55-64
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• 1992

A simulation program is developed to analyse the driving performance of an electric vehicle. It is composed of the structured modules modelled after the functional components of the electric vehicle. This program can be used conveniently in the conceptual design stage of a new electric vehicle. The comparision of the test data of ETX-1 developed by Ford with the calculated results shows reasonable agreement within 15% error.

• Proceedings of the KSLP Conference
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• 1998.11a
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• pp.195-195
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• 1998

성문부폐쇄부전(glottic insufficiency)를 수술적으로 치료하기 위한 노력은 여러 형태(silicone, hydrogen gel, teflon, etc.)의 성대이물주입술, 갑상성형술등 다양하게 시도되어 왔다. 그러나, 이러한 노력에도 불구하고 성문부폐쇄부전은 여전히 해결하기 어려운 문제로 남아있다. 여기에 1995년 Ford 등은 성문부폐쇄부전에 이은 음성장애치료의 새로운 접근방법으로 자가 콜라겐주입술(autologous collagen injection)을 소개하였다. (중략)

• Food Industry
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• s.14
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• pp.82-87
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• 1973

해외도입붐-. 그 물결을 타고 많은 외국기업들이 상륙했다. 크게는 자동차의 GM과 Ford, 석유의 걸프와 칼텍스등 이른바 $\ulcorner$세계기업 $\lrcorner$으로 불리우는 거상에서 가까운 일본의 이름 없는 중소기업에 이르기까지 다양하다. 이들은 해외시장개척과 현지생산의 메릿트를 찾아 줄이어 밀려닥치고 있다. 식품산업이라고 예외는 아니다. 기술제휴로 진출한 코카콜라와 펩시콜라가 시장쟁탈전을 벌이고 있고 맥스웰$\cdot$하우스$\cdot$커피의 제네럴$\cdot$푸우드(GF)도 합작투자로 상륙, 자리를 굳혔다. 이제 외국기업이라해서 아주 우리의 관심밖일 수는 없게 된 것이다. 여기 해외진출전략을 중심으로 세계식품메이커의 최근 동향을 알아본다.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1987.11a
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• pp.1-27
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• 1987

1. Gasoline engine sludge is a major worldwide problem 2. U.S. and European sludge have similarities 3. Stop-go driving and longer oil drains make the problem worse 4. Fuel is a major influencing factor 5. Increased use of cracked components may be cause 6. Sludge can be peproduced in controlled field tests 7. Daimler benz M102E and ford PV-2 (VE) tests have been developed to overcome problem by higher oil quality 8. The M102E and PV-2 respond in a similar way to increased dispersancy 9. High dispersant ocp viscosity modifiers appear to have unique adbantage in both tests

• Journal of Technology Innovation
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• v.26 no.3
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• pp.1-36
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• 2018

In the era of the 4th Industrial Revolution, it is important for companies to understand the changing environment by converging various technologies and to respond to the changing business environment. In this study, we conducted a social network analysis on 10 firms in the automotive industry, which have recently been accelerating their competition for technology development, by extracting convergence patents co-classified in two or more of the US registered patents in the last 6 years. As a result, it has been confirmed that the number of technology related to the convergence of the automotive field is greatly increasing, and the convergence between the technologies is becoming stronger. In addition, Volkswagen, Ford and Hyundai showed significant changes in technology convergence. They were analyzed as having a change in strategy in eco-friendly automotive technologies. This study suggests various ways for companies to utilize the results of network analysis more meaningfully.

• Journal of Korea Technology Innovation Society
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• v.19 no.2
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• pp.280-301
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• 2016

The competition environment among companies is rapidly expanding into the world market. Therefore, this study intended to suggest an analysis method of patent portfolio that can compare an international technological capacity through empirical analysis on the global automobile companies. This study measured international patent activity using triadic patent data of 20 years from 1991 to 2010, and measured patent quality from legal, technological and economic aspects. As a result, Ford and GM, automobile companies of America, are analyzed to be the potential leaders with greatly increased patent quality. The significance of this study is in measuring international patent activities between global companies from different countries based on the triadic patent. And, this study suggested methods of analyzing patent quality consistently from legal, technological and economic aspects based on the triadic patent.

• Journal of Korea Technology Innovation Society
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• v.14 no.1
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• pp.85-108
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• 2011

Under Ford system, corporations sought to maximize the economies of scale by raising the production efficiency. It aims to lower the production cost by increasing the quantity of output. But in the era of market flux and uncertainty, however, such strategies can no longer be sustained. Replacing the structures of Ford system, Toyota was able to accelerate the pace of process innovation and product innovation. Related to this innovation is JIT, new model development, modularization. The firm's reliance on flexible production technology provides opportunities to expand her production basis to foreign countries successfully. The main objective of this paper is to explore the contribution of process innovation to profit-capital ratio. The model is estimated using a time-series data of 18 years from 1990 to 2007 of auto production industry in korea. An Implication of this estimation shows that process innovation explains a significant portion of profit-capital ratio.

• Journal of the Korean GEO-environmental Society
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• v.11 no.6
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• pp.39-46
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• 2010

The past studies on reinforced earth retaining wall have been mostly focused on the internal and external failure of reinforced earth retaining wall, and the research for external impact was limited on earthquake. However, the potential external impact such as vehicle collision to reinforced earth retaining wall near the road are increasing with development of roads. Therefore, in this study, the reinforced earth retaining wall was modeled by using LS-DYNA, which is a general purpose finite element program recognized for its reliability. The behavior of reinforced earth retaining wall by vehicle speed was analyzed with Ford single unit truck offered by NCAC (National Crash Analysis Center), which is 8 tons weight. In addition, in order to obtain stability of reinforced earth retaining wall for vehicle collision, the gravity retaining wall was applied at the bottom of reinforced earth retaining wall. With varying the height of retaining wall (0.5m, 1.0m, 1.5m), the numerical study was performed to analyze the stability and behavior of reinforced earth retaining wall.

• Journal of the Korean Institute of Gas
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• v.21 no.3
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• pp.61-69
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• 2017

The commercial development of unconventional gas is pursued in North America because it is more feasible owing to the technology required to improve productivity. Shale reservoir have low permeability and gas production can be carried out through cracks generated by hydraulic fracturing. The decline rate during the initial production period is high, but very low latter on, there are significant variations from the initial production behavior. Therefore, in the prediction of the production rate using deterministic decline curve analysis(DCA), it is not possible to consider the uncertainty in the production behavior. In this study, production rate of the Eagle Ford shale is predicted by Arps Hyperbolic and Modified SEPD. To minimize the uncertainty in predicting the Estimated Ultimate Recovery(EUR), Monte Carlo simulation is used to multi-wells analysis. Also, kernel density function is applied to determine probability distribution of decline curve factors without any assumption.