• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.641-648
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• 2006

This study investigates which sound quality indices except SPL raise annoyance response. For investigation, auditory perception experiments for road traffic noise with identical linear SPL were performed by Paired Comparison Method. The numerical results of a Paired Comparison experiment express relative preference about annoyance. So that these relative preference scores are to be correlated to sound quality indices, which are absolute, a transformation is required to go from the relative domain to an absolute and linear scale of preference. The results of the transformation will be the 'merit values,' which quantifies the annoyance(in this case) of the road traffic noise on a linear scale. Using multiple regression, a formula is established that can calculate predicted merit values. Furthermore, This investigation offers a method selecting sound samples that represent various sound quality indices values to use experiment.

• Journal of the Korea Society of Computer and Information
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• 제11권2호
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• pp.295-301
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• 2006

An operational strategy for inventory control on finished goods in the distribution system has been given attention to many enterprises and many studies regarding this field have been done and is also on-going currently. It handling large scale of smallness type are so the requisition of customer which is various that over it continues more full scale merit. therefore, It is a tendency that many of enterprise is handling small scale of smallness type for environment change confrontation. but It is not easy for the enterprise to In customer demand diversification suiting because too need many cost. In addition, at enterprise charge extra weight because remainder inventory is causes of defective stock for a inefficient problem solution. this paper is rationalization of stock cost decrease for comparison evaluation of small scale quantify handling of singleness type and small scale quantity handling of largeness type.

• Proceedings of the Korean Society of Computer Information Conference
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• 한국컴퓨터정보학회 2008년도 제38차 하계학술발표논문집 16권1호
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• pp.99-103
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• 2008

An operational strategy for inventory control on finished goods in the distribution system has been given attention to many enterprises and many studies regarding this field have been done and is also on-going currently. It handling large scale of smallness type are so the requisition of customer which is various that over it continues more full scale merit. therefore, It is a tendency that many of enterprise is handling small scale of smallness type for environment change confrontation. but It is not easy for the enterprise to In customer demand diversification suiting because too need many cost. In addition, at enterprise charge extra weight because remainder inventory is causes of defective stock for a inefficient problem solution. this paper is rationalization of stock cost decrease for comparison evaluation of small scale quantity handling of singleness type and small scale quantity handling of largeness type.

• Asia Marketing Journal
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• 제1권1호
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• pp.3.1-3.26
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• 1998

산업구조의 고도화과정에서 개별기업들은 세분화된 전문영역의 가치활동을 담당할 수밖에 없으며, 대신 개별 기업들이 가치활동의 네트워크적 연결체제를 구축함으로써 시스템 간 경쟁체제로 이행되게 된다. 본 연구는 시스템간 경쟁상황 속에서 기업간 네트워크적 연결구조가 과연 어떠한 전략적 유효성원천을 가지는가에 관하여 살펴보고자 하였다. 이를 위해 경쟁력원천의 4가지 유형인 4 S 즉, Scale merit(규모의 경제성), Scope merit(범위의 경제성), Speed merit(속도의 경제성), System merit(시스템의 경제성)의 변천과정을 분석하였다. 시스템간 경쟁의 상황 속에서 지금까지의 경제성개념으로 설명할 수 없는 새로운 경제성 효과가 나타나게 되는데 이를 시스템경제성과 연결 경쟁력이란 개념을 통해 그 내용과 경쟁력제고의 전략적 시사점을 제시하였다. 향후 정보기술이 발전하면서 기업간 네트워킹관계를 통해 분업된 가치활동들의 연결이 보다 고도화될 것이며, 시스템 경제성의 여러 원천들이 상호 시너지적으로 결합되면서 연결경쟁력을 중심으로 한 경영패러다임의 중요성은 더욱 커질 것이다.

• Tribology and Lubricants
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• 제13권2호
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• pp.8-15
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• 1997

It is very difficult to express the state of a tested engine objectively concerning the malfunction, failure and wear of an engine. The general method of engine evaluation is to express evaluator's opinion for the engine state after testing. However, these methods is only subjective evaluation because test engineers, designers, and evaluators does not easily coincide in opinion. Therefore, in this article, the method of engine rating are introduced in order to represent the qualitative trends into quantitative value. The purpose of Engine Rating is to assign a quantified value to the tribology state of a tested engines. Originally, this Engine Rating method have been used to evaluate the performance of engine oil quantitavely. Using this method, we can predict the proper interval of engine oil change due to its objectivity. So, we can prevent the frequent change of engine oil and protect the environmental contamination. Furthermore, this method can be used to tell the general state of a tested engine after finishing engine durability tests. A single merit scale is used to evaluate numerically the state of cleanliness and the mechanical condition. Generally, a part which is absolutely clean or shows no wear, is rated merit 10. A part which is absolutely dirty or very worn, is rated merit 0.

• Journal of computational fluids engineering
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• 제21권3호
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• pp.89-97
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• 2016

In this study, direct code coupling, in which two codes share a single flow field, was conducted using 3-dimensional high resolution thermal hydraulics code, CUPID and 1-dimensional system analysis code, MARS. This approach provide the merit to use versatile capability of MARS for nuclear power plants and 3-dimensional T/H analysis capability of CUPID. Numerical Method to directly couple CUPID and MARS was described in this paper. The straight flow and manometer flow oscillation were calculated to verify conservation of coupled CUPID/MARS code in mass, momentum, and energy. This verification calculations indicates that the CUPID/MARS is coupled appropriately in numerical aspect and the coupled code can be applied to nuclear reactor thermal hydraulics after validation against integral transient experiments.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 한국소성가공학회 1997년도 추계학술대회논문집
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• pp.115-118
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• 1997

Recently, hot rolling oil lubrication technology is required to face with the new environments such as the rapid introduction of high wear resistent high speed steel roll the development of continuous hot rolling technology. In the hot strip mill, according to rolling and quality required conditions are constrict, Roll material of hot rolling finishing stand is changing Hi-Cr Roll to High Speed Steel [HSS] Roll. The problem of HSS Roll of roll force and strip scale defects are increasing in hot strip mill, So we have tested HSS Roll in hot rolling simulator as rolling condition, rolling speed, draft, hot oil concentration. To reduce roll force and prevent scale defects. We get some merit rolling force, rolling torque, roll wear reduction, roll and strip surface roughness and hot rolling critical oil concentration 0.4%. Finally we are going to investigate the effect of hot rolling oil of on rolling with HSS Roll.

• Journal of Korean Society of Water and Wastewater
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• 제25권3호
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• pp.383-390
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• 2011

In this study, a process combined biofiltration with sulfur-utilizing autotrophic denitrification and membrane separation was proposed to examine the efficiency of nitrogen removal. As an experimental device, hollow-fiber module was installed in the center of reactor to generate the flux forward sulfur layer in the cylinder packed with granular sulfur. In addition, a simple module was installed in activated sludge aeration tank which inside and outside of sulfur-using denitrification module was covered with microfilter and the module was considered as an alternative of clarifier. The experiment for developing new MBR process was carried out for three years totally. As the results of first two-year experiment, successful nitrogen removal performance was revealed with lab-scale test and pliot scale plant using artificial wastewater and actual plating wastewater. In this year, pilot scale test using actual domestic wastewater was performed to prove field applicability. As the results, high-rate nitrogen removal performance was confirmed with about 0.19 kg ${NO_3}^--N/m^3$ day of rate. Also significant fouling and pressure increase were not found during the experiment. And, the production ratio of sulfate and the consumption ratio of alkalinity showed a slightly higher value about 311 mg ${SO_4}^{2-}/L$ and 369 mg $CaCO_3$/L, respectively. In conclusion, the developed MBR process can be utilized as an alternative for retrofiting existing wastewater plants as well as new construction of advanced sewage wastewater treatment plants, with cost-effective merit.

• Tunnel and Underground Space
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• 제20권3호
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• pp.183-193
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• 2010

The present paper highlights some important fragmentation issues experienced in the limestone quarry blast rounds. In light of these major issues, the paper outlines influence of a few important design parameters, which bear merit to alter the blast performance in order to duly resolve the issues in field scale blast rounds. A comprehensive field based program for evaluation of such blast rounds has also been suggested. The knowledge disseminated in the paper, backed up by sufficient images, is largely based on the experience of the authors, while designing, implementing and evaluating numerous field scale blast rounds in cement grade limestone quarries.

• Journal of Korean Academic Society of Home Health Care Nursing
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• 제17권2호
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• pp.127-134
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• 2010

Purpose: This study was done to identify the effects of stress management program on perceived stress, geriatric depression, and somatic symptom in elderly Korean subjects. Methods: A pre-post test design with a nonequivalent control group was used. Fifty elderly Korean subjects with mild depression were recruited from the registerants at four public senior citizen centers within S-gu in Seoul. They were randomly allotted to the experimental group(n=25) and control group(n=25). The intervention was performed for one hour each week at each center for 5 weeks. The effects were measured by Perceived Stress Scale, Geriatric Depression Scale-Korean, and Patient Health Questionnaire-15. Results: Perceived stress and depression were significantly reduced in experimental group. The somatic symptom was not significantly different in the experimental group. Conclusion: The stress management program may have merit in improving mental health of elderly Koreans, although this conclusion is equivocal pending further well-controlled studies that include mediation techniques such as conversion therapy and health gymnastics.