• 한국기계가공학회지
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• 제16권4호
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• pp.119-126
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• 2017

High-precision wire is one of the most important components of lead production. However, no studies have been performed on the dimensional tolerance of these wires, and their capabilities have been deduced through trial and error. Therefore, PIANO, a commercial PIDO tool, was used to systematically determine the optimal parameters for stress minimization. The values obtained from the optimum design were modeled and analyzed using LS-Dyna, a finite element analysis program. Maximum stress was reduced by about 10% compared to its initial values, and the wire now satisfies dimensional tolerance ($10{\mu}m$).

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 1999년도 가을 학술발표논문집 Vol.26 No.2 (3)
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• pp.480-482
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• 1999

XML은 이제 우리에게 아주 생소한 단어는 아니다. 어느 정도 익숙해졌고, 앞으로 웹이 XML을 포함할 것이라는 점을 의심하는 사람도 많지 않을 것이다. 그러나 실제로 XML이 어떻게 생성되고, 저장되며, 어떠한 방법으로 응용이 되는지에 대해서 아는 사람은 그리 많지 않다. XML은 자신만의 태그를 가질 수 있고, 그 태그에 대한 설명을 할 수 있으며, 스타일 지정 문서를 사용해서 하나의 문서를 여러 형태로 배포할 수 있다. 또한 XML은 구조적인 문서이기 때문에 보다 쉬운 관리, 검색 그리고 편집을 위해서 데이터베이스에 저장하는 것도 가능하다. 본 논문에서는 XML의 이러한 특성을 활용할 수 있는 웹 상에서 구현된 XML 편집기를 보여주고 XML 문서를 데이터베이스에 저장하는 방법을 제안한다. 그리고 활용의 예로써 자동차 정비정보 시스템 구축 사례를 소개한다.

• 한국주조공학회지
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• 제33권5호
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• pp.210-214
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• 2013

Recently, the automotive industry has replaced cast iron to lightweight materials like aluminum for engine efficiency of automobiles and an emission control by government. In this paper we studied two auto parts manufacturing methods using an alloy of A356. That is gravity casting and H-NCM Rheo-diecasting forging. We analyzed the microstructure and mechanical properties for this method. In Microstructure analysis results, H-NCM Rheo-diecasting forging has more finer microstrucre and better forging effect. Resulting in better mechanical properties than gravity forging.

• 유통과학연구
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• 제11권11호
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• pp.89-99
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• 2013

Purpose - The purpose of this research was to examine the regulation and distribution channel of second-hand goods in cross-border trade in order to propose methods of protecting consumers through the international standardization of the intensifying second-hand trade and resource recycling. Research design, data, methodology - This study first defines several concepts relevant to research in international second-hand goods. Second, a questionnaire and interviews were conducted with manufacturers of second-hand toner cartridges and automobile parts to identify the current status of export and manufacturing. Results - The study proposes the international standardization of second-hand goods and waste to protect consumers and promote efficient resource recycling. Conclusions - The results of the study reveal that second-hand goods (except automobiles) do not have an HSK code to use for import/export data collection. Though used car exports are declining, used cars are increasing. Collecting data on used car parts is impossible because the buyers purchase and ship the second-hand parts.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.60-60
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• 2000

CAN(Controller Area Network) is a serial communication protocol which specifies very low cost and high performance. It is widely used in rea1-time control applications such as automobiles, aircraft, and automated factories. The main application fields are industrial control systems and embedded network. In this paper, the CAN monitoring system is proposed and implemented. Also its performance is tested in the mobile robot which is integrated by CAN and its performance lot receipt failure rate is evaluated. This can be used to analyze the performance of the network. It can tie also used to manage and monitor the network.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.389-389
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• 2000

The number of automobiles is rapidly increasing , as are the importance of the car as a way of transportation, and the variety of its uses. In these surroundings, a safety, one of the primary factors which must be considered in automotive engineering, demands a system that aids the driver's vision and perception. In this point of view, development of the more promoted system that complement the existing passive method which relies on just man's ability is the important issue of the advanced traffic system including ITS. In this paper, we provide an algorithm and implementation of a control system that warns the collisions ahead and avoids this situation, using informations about the host-car, target-car and surroundings. The warning is made by an algorithm that decides the degree of safely. With this degree of safely, the controller automatically controls a vehicle's speed to a proper level.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.164-164
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• 2000

This paper proposes a moving window technique that extracts lanes and vehicles using the images captured by a CCD camera equipped inside an automobile in real time. For the purpose, first of all the optimal size of moving window is determined based upon speed of the vehicle, road curvature, and camera parameters. Within the moving windows that are dynamically changing, lanes and vehicles are extracted, and the vehicles within the driving lanes are classified as obstacles. Assuming highway driving, there are two sorts of image-objects within the driving lanes: one is ground mark to show the limit speed or some information for driving, and the other is the vehicle as an obstacle. Using characteristics of three-dimension objects, a neural network can be trained to distinguish the vehicle from ground mark. When it is recognized as an obstacle, the distance from the camera to the front vehicle can be calculated with the aids of database that keeps the models of automobiles on the highway. The correctness of this measurement is verified through the experiments comparing with the radar and laser sensor data.

• 로봇학회논문지
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• 제3권1호
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• pp.1-8
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• 2008

Automatic parking assist system is one of the key technologies of the future automobiles. Control problem of a car-like vehicle is not easy due to the nonholonomic constraints. In this paper, a practical solution for planning a car-parking path is proposed according to the proposed motion space (M-space) approach. The M-space is the extension of the conventional configuration space (C-space). A collision-free, nonholonomic feasible path can be directly computed by the M-space conversion and a back-propagation of reachable regions from the goal. The proposed planning scheme provide not a single solution, but also a candidate solution set, therefore, optimization of the parking path can be easily carried out with respect to performance criteria such as safety, maneuvering, and so on. Presented simulation results clearly show that the proposed scheme provides various practical solutions.

• 지역연구
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• 제14권1호
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• pp.1-20
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• 1998

In this paper, the authors studied a comprehensive study of national physical distribution costs used here was originally developed by J. L. Heskett(1962) and modified in Korean context by Oh-Kyung Kwon(1997). Using this method the authors calculated national physical distribution costs in Korea from 1984 to 1996. Unlke the major industrialized countries, national physical distribution costs in Korea showed continuous increasing trend in every senses. Using this time series data on physical distribution costs, we analysis the inefficiencies in the physical distribution and figured out the sources of these inefficiencies. The major sources of increasing physical distribution costs in Korea were (1) increasing traffic congestion measured by number of automobiles per road-kilometer, (2) increasing real wages, and (3) high interest rates. Especially, alternatives adopted by firms facing increasing traffic congestion were buying more vehicles, which in turn caused more serious congestion ever. This inefficient cycle in physical distribution area should be cut somehow in order to restore national competitiveness of Korean frims by reducing physical distributins costs.

• 기술혁신학회지
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• 제5권3호
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• pp.367-381
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• 2002

This study deals with the technological trends in the automobile recycling technologies. It first discusses the importance and current situation of automobile recycling. And then it discusses the technological trends in automobile recycling industry classifying the technologies into three groups: disassemblying, recycling, and design. It deals with recycling of major parts of automobiles and the design of automobile for recyclability. This study also contains a patent analysis of the technologies. Different patterns in the trend of patents among various conn-tries are discussed with the context of legal and industrial situation of each country And finally it discusses the forecasting for the future technological and legislative trends.