• Proceedings of the KIPE Conference
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• 1998.07a
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• pp.27-30
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• 1998

In this paper, the inverter air-conditioner with Power Factor Correction(PFC) circuit is Presented for obtaining the good system efficiency and cost merit compared with the conventional inverter air-conditioner. The detailed design procedures for getting the optimal passive components are implemented. Through the simulation and experimental results, it is shown that the system efficiency can be improved. Using the designed components, the prototype system is builted and tested to verify the additional good performances of the proposed circuit.

• Proceedings of the KSRS Conference
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• 2007.10a
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• pp.69-72
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• 2007

No doubt that more vast data and precise values are required for the detailed and accurate analysis result. People's expectation for the output of space application goes higher, and consequently satellite memory system has to process massive data faster. This paper reviews memory systems of KOMPSAT (Korea Multi-Purpose SATellite) series and try to find a suitable memory system structure to process data more faster not at device level but at system level.

• Transactions of the Korean Society of Automotive Engineers
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• v.21 no.1
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• pp.9-16
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• 2013

Although it is widely accepted that a fire can occur due to electrical causes even when an engine stops, there is little introduction of detailed case analysis. This study analyzed a fire case caused by an electrical cause during engine stopping at parking lot in detail. Moreover, it was revealed that the fire was mainly caused by design defect.

• Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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• 2003.02a
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• pp.160-162
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• 2003

Termination cryostat for 22.9kV, 1.26kA-class HTS power cable has been designed. The cryostat consists of vacuum vessel, liquid nitrogen vessel, current lead and HTS power cable. The current lead and the HTS power cable are connected in liquid nitrogen vessel cooled by forced-circulation subcooled liquid nitrogen. The maximum total heat load of this cryostat is expected to be 150w. In this paper, the detailed design of the termination cryostat is mentioned.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.22 no.50
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• pp.231-241
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• 1999

Recent market competition forces the price to be determined in the design stage so that the design would meet the target price of the product. However, most commercial PDM(Product Data Management) systems currently in use lack such a cost estimation function. In this paper, we propose detailed structure and functions of a new approach to estimate the cost of new products using integrated BOM in PDM. Such system will reduce the total life cycle cost of the products to be designed.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.33 no.2
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• pp.62-69
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• 1984

In this paper we present a microprocessor-based interpolator using algebraic arithmetic method. The interpolator consists of 2900 "bit-slice" microprocessor chips and 0.5K ROMs of 36-bit microprogram memory. The system design is an instuction-data-based architecture with 250ns cycle time. A significant feature of the interpolator is that it has flexibility, very fast interpolation speed of 250 K pulses/sec, and performs additional functions simultaneously. Throughout the paper detailed explanations are given as to how one can design the hardware and software, and experimental results are presented.presented.

• 연구논문집
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• s.24
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• pp.107-117
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• 1994

In aerodynamic design of centrifugal compressors, impellers are designed through preliminary design and blade profile generation. In order to find out faults of the initially designed impellers, the detailed informations about internal flow phenomena such as pressure distribution, flow separation, blade loading, etc are essential. These informations can be acquired with flow measurements or computational flow analyses. In this study, we calculated 3-D viscous flow in 4 back-swept impellers which were designed in our laboratory, and analyzed the flow characteristics which influence the performance of impellers.

• Journal of KSNVE
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• v.4 no.4
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• pp.425-433
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• 1994

A detailed investigation of a reed resonance for a vertical pump design has been conducted. The structural features of this class of pump lead to typical dynamic characteristics. Of particular importance is the fact that the pump assembly is suspended on a high column above the floor with a heavy motor on the top. Considerable amount of mass forces is involved and the vibration can cause damage to the pumps or to the foundation. It is shown that the reed resonance of the pump-motor system plays important role for design and troubleshooting purposes.

• Korean Institute of Interior Design Journal
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• v.14 no.5 s.52
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• pp.71-79
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• 2005

Thinking methods have been widely recognized as phenomenon of problem solving in architectural design process and as one of the bases of creativity. In recent years the study of thinking methods have become a major focus of design research. And the purpose of the paper will understand the phenomenon of characteristic and classification of thinking methods in the architectural design process. Extensive protocols are recorded. In particular, the protocols contain sufficient information to make a detailed picture of the architect's problem-solving processes. A protocol study is reported in which the experimental data by architect's is analyzed through the visual protocol analysis method. These findings will help understand the architectural design nature. And they supply a direction for creative education for architects and the base for CAAD system development through understanding for architect's thinking methods.

• Journal of the Korean Society for Precision Engineering
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• v.28 no.2
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• pp.133-139
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• 2011

We have performed optical design of light guide plates (LGPs) for a photobioreactor by using an illumination design tool. An LGP having light emitting diodes (LEDs) as a light source on the four sides was designed by optimizing the distribution of LGP patterns and design of another LGP, on top of which sunlight was focused by a Fresnel lens, was executed. Finally, a hybrid-solar-and-LED-lighting scheme was described. Detailed design process and optical performances of the designed LGPs are presented.