• 한국소음진동공학회:학술대회논문집
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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.

• 한국컴퓨터정보학회논문지
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• 제11권2호
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• pp.295-301
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• 2006

분배시스템에서 완제품에 대한 재고통제 운용전략은 기업들에 있어 많은 관심의 대상이 되어 오고 있으며, 스케일메리트(scale merit)기대를 위한 소종대량 취급방식은 고객 요구의 다양화로 더 이상 지속하기 힘들게 되었다. 이러한 환경변화에 대응하기 위하여 많은 기업들은 다양한 제품을 취급하는 추세에 있다. 그러나 기업이 고객 요구다양화에 부응하기에는 많은 비용이 소요된다. 게다가 잔여재고는 진부화 또는 불량재고가 되어 기업에 부담을 가중시킨다. 이러한 비효율적인 문제해결을 위하여 본 연구는 다종소량 취급 방식과 소종소량 취급 방식의 비용비교를 통하여 물류수송비용 및 재고비용 감소의 합리화를 도출 하였다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2008년도 제38차 하계학술발표논문집 16권1호
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• pp.99-103
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• 2008

분배시스템에서 완제품에 대한 재고통제 운용전략은 기업들에 있어 많은 관심의 대상이 되어 오고 있으며, 스케일 메리트(scale merit)기대를 위한 소종대량 취급방식은 고객 요구의 다양화로 더 이상 지속하기 힘들게 되었다. 이러한 환경변화에 대응하기 위하여 많은 기업들은 다양한 제품을 취급하는 추세에 있다. 그러나 기업이 고객 요구 다양화에 부응하기에는 많은 비용이 소요된다. 게다가 잔여재고는 진부화 또는 불량재고가 되어 기업에 부담을 가중시킨다. 이러한 비효율적인 문제해결을 위하여 본 연구는 다종소량 취급 방식과 소종소량 취급 방식의 비용비교를 통하여 물류수송비용 및 재고비용 감소의 합리화를 도출하였다.

• 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.

• 한국전산유체공학회지
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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.

• 한국소성가공학회:학술대회논문집
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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.

• 상하수도학회지
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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.

• 터널과지하공간
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• 제20권3호
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• pp.183-193
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• 2010

이 논문은 석회석 광산의 발파 중에 일어나는 파쇄도 관련 문제들에 대하여 고찰한 것이다. 먼저 실 규모 발파 시에 발파 결과를 크게 달리 할 수 있는 중요 발파설계변수를 추출하였다. 또 현장에서 간편하게 적용할 수 있는 발파 성과 평가 방법을 제시하였다. 이는 저자들이 시멘트 제조를 위한 석회석 광산에서 다양한 규모로 설계, 시공, 평가 한 경험에 근거한 것이다.

• 가정∙방문간호학회지
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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.