• Journal of the Korean Professional Engineers Association
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• v.34 no.2
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• pp.14-18
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• 2001

The primary cooling piping of HANARO is classified as safety class 3, seismic class 1 and quality class Q. This piping as safety related feature has been designed, manufactured and tested in accordance with ASME SEC. Ⅲ, DIV 1, Class 3. In October of 2000, the first step of the in-service inspection for this piping was carried out in accordance with ASME SEC. XI. This describes the results of the Inspection including the preparation of inservice inspection plan and inspection method. It is verified through the results that the safety related piping is maintained the mechanical and structural Integrities.

• Journal of the Korean Professional Engineers Association
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• v.33 no.6
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• pp.38-44
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• 2000

This article describes the air conditioning and control system of cabin which commertial aircrafts have adapted extensively upto now. Even though the aircrafts requires the study of the aerodynamics to produce the life in the air, most of internal system should utilize mechanical, electrical, and electronic system used on conventional appliances of industries. Therefore, all of industries are invited to pay more interest in this field aggressively and suggested to think the aircraft as a building simply moving in the sky.

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.79.2-79
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• 2002

1. the principal of a PSD(Position Sensitive Detector) 2. the optical system of the proposed method 3. signal processing 4. experimental result A mechanical engineer experiment on the tension test. In this experiment, they use the extensometer which can measure the extended distance of material. A normal extensometer is the contact type which means that the extensometer should attached to the specimen. It is not convenient to the user. The contacting type can also effect the characteristic of the specimen. So a extensometer is changed from contacting type to non-contacting type. Non-contacting type is not necessary to attach the extensometer to the specimen...

• Journal of the KSME
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• v.22 no.2
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• pp.115-123
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• 1982

일반적으로 산업에 소요되는 기술인력을 크게 나누면 고급기술인력 (engineer, technologist)과 중견기술인력 (technician)및 기능인 (crafts man, skill worker) 으로 나눌 수가 있다. 국가경제를 발전시키고 국력을 신장시켜 80년대 국제경쟁에서 뒤지지 않으려면 유능한 기술인력을 양성하는 교직이 불가피하다. 1982 년도 우리나라의 교육시책 방향중 공업교육시책에 해당되는 "고도산 업사회에 부응하는 과학기술교육의 진흥"은 그 비중을 상당히 크게 두고 있으며, 또한 "복지사회 구현을 위한 평생교육의 확충"도 공업교육 측면으로 불 수 있다고 하겠다. 공업교육의 시책방 향을 학교급별로 고찰해 보면 다음과 같다.학교급별로 고찰해 보면 다음과 같다.

• Journal of Mechanical Science and Technology
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• v.17 no.5
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• pp.679-690
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• 2003

As the rate of increase in areal density of the HDD has accelerated, dynamic characteristics of the HDD actuator need to be improved with respect to the performance of the tracking servo and shock transmission. Therefore, it is important to analyze the vibration characteristic of the HDD actuator that consists of the VCM part, E-block and pivot bearing. In this paper, vibration modes of the HDD actuator are investigated the using finite element and experimental modal analyses methods. To develop a detailed finite element model, finite element models of each components of the actuator assembly are constructed and tuned to the results of the EMA. The VCM coil is modeled as an equivalent finite element model that has an orthotropic material property using auto-model updating program. Auto-model updating program with improved sensitivity based iterative method is applied to build a detailed finite element model using the result of the EMA. A detailed finite element model of the HDD actuator is then constructed and analyzed.

• Journal of Engineering Education Research
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• v.9 no.3
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• pp.78-89
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• 2006

The economic depression during the last decade of the 20th century caused various drastic changes in the social structure, including employment and educational systems. Japanese universities have devoted much effort to research activity and the development of teaching methodology for engineering education was not a major effort for professors. Decrease of 18 years old population, however, forced universities to change this attitude. University education is no more for only elite but is becoming very popular among young people. Another impact came from the 'globalization'of industrial societies such as establishment of WTO and APEC. Japan Accreditation Board for Engineering Education (JABEE) was established to cope with both domestic and international problems in 1999, and JABEE was admitted as a full signatory member of the Washington Accord in 2005. The Professional Engineer Law was amended linked with JABEE. The importance of engineering ethics has been recognized with these social structure changes. Japanese Society for Engineering Education (JSEE) is contributing for reformation of Japanese engineering education through its activities including supporting JABEE. This paper describes the problems now Japanese engineering education is facing and the role of JSEE in order to reorganize the engineering education in Japan.

• Journal of Engineering Education Research
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• v.11 no.1
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• pp.34-47
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• 2008

The purpose of this paper is to design the curriculum by considering the experimental design and analysis for enhancing an engineer's creative problem-solving ability. This ability is one of the important objectives in modern engineering education. To achieve this purpose, first, it is suggested that the experimental design and analysis, a specific area of engineering education, is highly relevant to the creative problem-solving ability, one of the basic engineering competencies and of the final goals in engineering education. And also, the curriculum already introduced the experimental design and analysis in departments of mechanical engineering of universities are surveyed and reviewed. 59 papers are also analyzed to know how engineers applicate the knowledge of the experimental design and analysis to their activities. Finally, the module of engineering education curriculum introduced the experimental design and analysis to enhance effectively the engineer's creative problem-solving ability is suggested.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.34 no.4
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• pp.429-435
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• 2010

In approximately fifty utilities, including KHNP (Korea Hydro & Nuclear Power), CHECWORKS is used as a tool for predicting and managing the wall thinning of carbon steel piping; this wall thinning is caused by flow-accelerated corrosion (FAC). It is known that CHECWORKS is only applicable to predict the wall thinning of piping with large bores. When dealing with small-bore steel piping, FAC engineers measure the thickness of the susceptible area that is selected on the basis of the experience and judgment of the engineer. This paper proposes the application of CHECWORKS for the management of wall thinning of small-bore piping. Four small-bore pipelines of a domestic nuclear power plant were analyzed from the viewpoints of FAC and fluid dynamics by using CHECWORKS and FLUENT code. Depending on the engineer's skill, CHECWORKS can also be used for the management of wall thinning of small-bore piping.

• Journal of Mechanical Science and Technology
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• v.16 no.7
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• pp.942-949
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• 2002

The use of a combined starter/generator integrated into the drive train of an automobile offers several possibilities for improvement of fuel economy The use of such a starter/generator system is made feasible by a switch from a 14 volts electrical system to a 42 volts system, however, the sizing of the components is not a trivial problem. This study combines a dynamic electromechanical model of the starter, battery and power electronics with the nonlinear mechanics of the piston/crankshaft system and a thermofluid model of the compression and expansion processes to investigate the cold start problem. The example involves the start of an eight cylinder engine at -25 degrees Celsius. This paper shows how the mechatronic V8 engine of an automotive starter/generator system for the startability works well.

• Proceedings of the ESK Conference
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• 1998.04a
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• pp.13.1-18
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• 1998

IVNS(In-Vehicle Navigation System) which developed by the advance of technological system including computer, display and communication will procide the important interface functions between the driver and the ITS (Intelligent Transport System). However, hat the human factors engineer can actually offer to the designer is by no means a complete set of design specifications. Therefore, a set of boundary conditions and operational ranges within which the designer can be assured that physical, perceptual and cognitive abilities and limitations of drivers will be accommodated system atically[6]. Also, this will be the considerations to compose the IVNS HMI (Human-Machine Interface) design guidelines and IVNS HMI evaluation system. As the first phase of developing the IVNS HMI evaluation system, this paper describe the architecture and the content of this system.