• Journal of the Korean Society for Precision Engineering
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• v.21 no.5
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• pp.131-141
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• 2004

In this study a 3-D automatic die design supporting system for a bonnet panel has been developed using Pro/ROGRAM of the widespread CAD software Pro/ENGINEER A standard drawing die was defined in terms of the punch profile, the die face geometry, and the blank sheet size. The strip layout of a trimming die was defined, in addition, in terms of the trimming line and the locations of scrap cutters. Necessary relations for each design step are formulated and rules for bottom-up type 3-D die design were set up for the automatic design of drawing and trimming dies of a bonnet. With the input geometric data of punch profile, die face, and blank sheet, this 3-D design supporting system could complete the basic design process, in case of the bonnet drawing die, in a time 78% shorter than that required by a typical 2-D CAD system. The new design system showed remarkable design efficiency also when it was applied to the case of redesign and modification of the previous standard output for a different car type.

• Korean Institute of Interior Design Journal
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• v.26 no.4
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• pp.3-11
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• 2017

The appropriate area for human's most basic living space is an important factor. Therefore, the 'minimum housing standard' is a very important factor to ensure a minimum quality of living space for human life. In Korea, however, the importance of the 'minimum housing standard' has been neglected for about 20 years. Even in Korea, the 'minimum housing standard' has become an nominal existence. In other countries, studies have long been conducted on the minimum housing standards, but studies have shown that studies on the minimum housing standard are not actively occurring in Korea. The purpose of this study is to diagnose the current status of the 'minimum housing standard' in Korea and to explore the direction of future research. The study included a total of 29 researches commissioned by the Korea Academic Research Institute (KCI). To ensure the objectivity and reliability of the analysis, analyzed year of research, field of research, method of research, contents of research. Through this study, it is possible to grasp the tendency of previous studies on 'minimum housing standard' in Korea and it is meaningful to increase the usability of 'minimum housing standard' in residential planning. It is also expected that future research on 'minimum housing standards' will be able to present the direction of the field to be developed.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.25 no.11
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• pp.26-32
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• 2011

In this study, a standard illuminant A type LED that has similar emission spectrum as the standard illuminant A was developed using LED chip(emission peak: 405[nm]) and four types of phosphors(blue, green orangered and red). Using the design of experiment for spectrum control, the trend of the change of spectrum shape influenced by the change of interaction among phosphors and their density could be examined. Computer simulation through the optimization of the design of experiment revealed that, among four phosphors, the most influential one on the shape of the spectrum was green phosphor. Using the obtained optimal combination ratio of the four phosphors, an alternative LED illuminant to the actual standard illuminant A was developed and the spectrums of these two were confirmed identical. Using this standard illuminant A type LED, a portable transmittance meter with the range of measurement error of ${\pm}1.0$[%] was developed.

• Proceedings of the KIEE Conference
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• 2005.05a
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• pp.134-136
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• 2005

This paper deals with the standard logic symbols with which the engineer will design the control strategy and loop for the utility boiler of the next generation thermal power plant For this purpose, we review the existing international standards for logic symbols. which include ISO, ANSI, and older SAMA. From this review, it is possible to design the standard logic symbol that will be used in the following design phase. The designed standard logic symbols are supposed to provide the logic design with independence from the specific hardware that will be employed in the phase of construction.

• Journal of Veterinary Clinics
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• v.31 no.4
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• pp.288-292
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• 2014

A critical assumption of the standard sample size calculation is that the response (outcome) for an individual patient is completely independent to that for any other patient. However, this assumption no longer holds when there is a lack of statistical independence across subjects seen in cluster randomized designs. In this setting, patients within a cluster are more likely to respond in a similar manner; patient outcomes may correlate strongly within clusters. Thus, direct use of standard sample size formulae for cluster design, ignoring the clustering effect, may result in sample size that are too small, resulting in a study that is under-powered for detecting the desired level of difference between groups. This paper revisit worked examples for sample size calculation provided in a previous paper using nomogram to easy to access. Then we present the concept of cluster design illustrated with worked examples, and introduce design effect that is a factor to inflate the standard sample size estimates.

• Journal of the Earthquake Engineering Society of Korea
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• v.18 no.5
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• pp.231-240
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• 2014

This study reviews the status and validity of seismic design criteria (SDC) for major facilities in Korea, which are composed of performance criteria and technical standard. Various facilities with different seismic design response spectra are analyzed to identify their seismic performance and necessity of eventual retrofit. The results are used to derive improvement directions of SDC. It is also concluded that the technical standard should be improved after the revision of the performance criteria.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.772-779
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• 2008

Through this study, standard design guidelines for the high speed EMU have been derived to meet the crashworthiness requirements of the Korean rollingstock safety regulation. The crashworthiness regulation requires some performance requirements for two heavy collision accident scenarios; a train-to-train collision at the relative speed of 36 kph, and a collision against a standard deformable obstacle of 15 ton at 110 kph. The complete train set will be composed of 2TC-6M with 13 ton axle load, different from KTX with the power car of 17 ton axle load. Using theoretical and numerical analyses, some crashworthy design guidelines were derived in terms of mean crush forces and energy absorptions for main crushable structures and devices. The derived design guidelines were evaluated and improved using one dimensional spring-mass dynamic simulations. It is shown from the simulation results that the suggested design guidelines can easily satisfy the domestic crashworthiness requirements.

• Magazine of the Korean Society of Agricultural Engineers
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• v.29 no.3
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• pp.113-124
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• 1987

The objective of this study was to disclose the problem of structural safety and the state of utilization of standard types of plastic film house through investigation of actural state of plastic greenhouses for the southern part of the Korean peninsula. And also, the application method of standard types were proposed. The results obtained are summarized as follows 1. Plastic film houses investigated were not designed by the structural design conditions of loads and materials. 2.The construction method of greenhouses was not standardized. 3.Single type of standard greenhouses was nearly used and double types were applied to the standard type. 4.The standard frames of plastic film house were appeared to have structural lack of stability at the design snow and wind loads for most regions. 5.Safety snow depths and safety wind velocities were proposed for the frame intervals and pipe diameters of standard greenhouses.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2011.06a
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• pp.182-182
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• 2011

This paper dealt with a design guide of LED luminaire standard for naval vessels. Several standards such as Korean Industrial Standard (KS), Korea Defence Standard (KDS) and US Military Standard (MIL) were compared in terms of safety and performance of lighting fixtures. The electrical and optical characteristics of the FL fixtures were experimentally analyzed to acquire design rules for LED luminaires. Based on the study results, we proposed the concept of a LED luminaire standard.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.04a
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• pp.230-235
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• 2009

In our country, the application of the design method of face to face dimension in wall-slab apartment has passed 10 years. So MC design method has fixed in the design step to some degree. In Design and Work Execution of House the exclusive area of the apartment was calculated by face to face dimension. And the term of face to face dimension was known broadly to clients, construction company, etc. But design method of face to face dimension is not to simply extend the room size so far as wall depth in design process but to ensure the actual space should be considered with efficient use and assembly of building components. That is to say, Design method of face to face dimension is not to be defined by design step but to be related with construction and maintenance. However in construction process the point of face to face design method was not understood even now. So the purpose of this study was to extract the effect and question of face to face design method in construction process by survey of actual condition of structure and construction quality, and compare this result with existing construction method. The following project of this study is to survey of actual condition of interior components such as gypsum board, windows & doors etc. Therefore this study is to induce architectural long-life through architectural standardization construction and component's exchange, and, by the subject of the study on Apartment to have design guideline and basis for joining part between Gypsumboard and windows.