• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.16 no.5
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• pp.408-413
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• 2004

An experimental study has been carried out to investigate overheating of oil and bearing housing during pump operation. This problem is of particular interest in the pre diction of lifetime and failure of pump. Transient variation of oil temperature as well as bearing housing temperature is measured to study the effect of oil viscosity, oil amount, and discharge flow rate of pump. It is found that optimal oil quantity as well as proper viscosity of oil is required to keep the safe temperature level of oil and bearing housing in a pump. The oil temperature at steady state is almost not affected by discharge flow rate in the range of discharge flow rates considered in the present study.

• Journal of the Korean housing association
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• v.16 no.6
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• pp.93-100
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• 2005

Turning into the 21st century, there are great demands for the diversification of housing style and amenity of housing, which include enhancing community life through proper collective environment. To solve these problems, cohousing has been introduced in Scandinavian countries. A primary goal of cohousing is the desire of residents to live in a socially supportive setting. People can do housework together and also can promote active mutual relationship among residents in the community. Physical feature of cohousing, in combination with social organization factors, nay serve to enhance or support the sense of community sought by residents. In this point of view, the purpose of this study is to consider the characteristics of planning factors applied to the community concept in cohousing. First consideration is to figure out the planning skills on community concept in housing community. Then, by making clear the planning factors on community concept in cohousing through case study, this paper could suggest a possibility of application of cohousing in Korea.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.11a
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• pp.278-283
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• 2009

Nowadays as public rental apartment increasing, a new national policy for the public rental apartment maintenance is needed. The co-op housing system can be considered as one of the solutions for that needs, as our socio-economical environment changes. This research is on development of the co-op housing maintenance system. The feasibility of the co-op housing maintenance system has been analysed, and an preliminary UML model for the system has been proposed. Research focus is on how the model can be well established from the analysis of a questionnaire survey.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.1 no.1
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• pp.89-100
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• 2002

The purpose if this research was to improve the pressure distribution on the disk brake pad Not uniform pressure distribution on the disk brake pad generate the unbalance wear of it and the unbalance wear of disk brake pad generate vibration, noise, heat and reduce the braking capacity. For improve the pressure distribution on the pad in this research, upper face of caliper housing finger was cut. Two kinds of caliper which uncut and cut of finger face were compared the stress distribution by FEM analysis and real experiment. Also natural frequency and deforming displacement ware calculated. It was understood that pressure distribution could Improve by cut inside upper face of caliper housing finger.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.04a
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• pp.3-7
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• 2002

The die casting process was used to manufacture a alternator housing for automobile. Specially automobile parts were required light and hight strength. Therefore simulation have been carried out die casting process of the alternator housing. In this paper, we investigated about characteristics of the die casted alternator housing the HPDC(High Pressure Die Casting) process. Also we designed the die casting die with the simulation results of the alternator housing. The MAGMAsoft and Auto-CAD was used as computer simulation and design code and used material was ADC12(Aluminum Die Casting Alloy). We present the results of filling behavior and design of die process of the alternator housing cast. The result obtained about filling behavior and design of die of the cast showed good agreement with test result.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.769-773
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• 2002

The die easting process was used to manufacture a motor housing for automobile. Specially automobile parts were required light and high strength. Therefore simulations have been carried out die casting process of motor housing. In this paper, we investigated about characteristics of the die casted motor housing with HPDC(High Pressure Die Casting) process. Also the MAGMAsoft was used as computer simulation code and used material was ADC12(Aluminum Die Casting Alloy). We present the results of filling behavior and solidification process of a motor housing cast. The analysis results obtained about filling behavior and solidification of cast showed good agreement with test results.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2001.10a
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• pp.165-168
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• 2001

정보기술의 발전은 기업의 마케팅 방식과 고객 정보를 관리하는 방법을 변환시키고 있다. 급속도로 확산되는 인터넷 환경은 데이터의 수집 과정을 쉽게 만들었으며, 대량의 데이터를 기업에 제공할 수 있게 하였다. 새로운 정보기술 도구로 인해 가능해진 대량의 고객 정보는 기업에게 경쟁 우위를 얻기 위한 도전과 기회를 제공하고 있다. 많은 조직에서는 의사 결정 지원을 위하여 이들 거대한 데이터베이스에 내재된 지식의 중요성을 인식하고 있다. 특히, 이들 데이터베이스로부터 추출된 고객에 대한 지식은 마케팅에 매우 중요하게 사용될 수 있다. 본 연구에서는 데이터웨어하우징을 이용한 CRM 아키텍처를 제안한다. 고객 중심의 전사적인 CRM 아키텍처를 제시하고 CRM 시스템 구성에 필요한 주요 기능을 제안한다. 제안된 아키텍처 내에서 고객 데이터는 다양한 애플리케이션 데이터 소스로부터 데이터전송 시스템을 이용하여 데이터웨어하우스로 통합된 뒤, 다시 마케팅 데이터 마트로 구성되어 CRM 활동에 사용될 수 있다. CRM은 고객 인식(Customer Identification), 고객 분석(Customer Analysis), 상품분석(Product Analysis), 고객 서비스(Customer Service)의 주요 기능을 갖는다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.977-980
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• 2011

In this paper, explain to development of low pressure axial compressor performance test rig in KARI. Performance test rig consist of a entrance section, rotor, stator, shaft, rig housing, bearing housing and exit section. Test rig design structural optimization to rotor dynamics analysis of the simplified rotor-shaft assembly and flow analysis of entrance/exit section.

• Transactions of the Korean Society of Mechanical Engineers
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• v.18 no.9
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• pp.2234-2244
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• 1994

A process sequence of multi-operation cold forging for actual application in industry is designed with the rigid-plastic finite element method to form a constant velocity joint housing(CVJ housing). The material flow during the CVJ housing forming is axisymmetric until the final forging process for forming of ball grooves. This study treats the deformation as an axisymmetric case. The main objective of the process sequence design is to obtain preforms which satisfy the design criteria of near-net-shape product requiring less machining after forming. The process sequence design also investigates velocity distributions, effective strain distributions and forging loads, which are useful information in the real process design.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.5
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• pp.36-41
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• 2015

In this paper, research on the mold design of motor housing produced by the HPDC process was conducted using computer simulations and experiments. Recently, automobile parts have been required to be light and have high strength. The die casting process was used to manufacture automotive motor housings. In the die casting process, the control of casting defects is very important. However, it has usually depended on the experience of the foundry engineer. For the analysis of the manufacturing process of motor housing, the finite element method is applied. Through the simulations using commercial software, the filling pattern and product defects could be confirmed. The analysis results obtained from the filling behavior of the casting process agreed with the experimental results. The computer simulation results of filling behavior were reflected in the optimal mold design of motor housing.