• 산업기술연구
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• 제32권A호
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• pp.125-128
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• 2012

In this paper, we proposed a prioritization method of test cases using a value estimation model of test sets, that are key elements for highly effective software testings as well as involve a large cost factor in software developments and maintenances. Based on previous studies, our idea includes introducing some practical factors of the test case prioritization which critically influence the value of a test case: Relative values of test sets before and after the test running, Average value of these two relative values, Severity of the defect, Risks that are covered, Frequency of use, Change related values, Systematic elicitations, etc. Finally we discussed the usefulness and the expected effects of the proposed scheme.

• 전기의세계
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• 제26권4호
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• pp.61-67
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• 1977

This paper treats the Ultrasonic effects on the break down characteristics of Liquid Dielectric Material 1) Relative Dielectric constant, Es of Liquid Dielectric Material at a constant temperature decreases in proportion to the irradiated time of Ultrasonic radiation and its intensity, and reaches to a certain saturated value. The saturated value varies with the intensity of Ultrasonic radiation. 2) Power factor of Liquid Dielectric Material at a constant temperature increases in proportion tothe irradiated time of Ultrasonic radiation and its intensity, and reaches to a certain saturated value. The saturated value varies with the intensity of Ultrasonic radiation. 3) Relative resistance of Liquid Dielectric Material at a constant temperature decrease with the irradiated time of Ultrasonic radiation, but the effect of its intensity is very irregular. 4) Break-down strength of Liquid Dielectric Material, at a constant temperature decreases with the irradiated time of Ultrasonic radiation and its intensity, and then reaches to a saturated value.

• 대한간호학회지
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• 제41권3호
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• pp.302-312
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• 2011

Purpose: The purpose of this study was to develop a resource-based relative value scale (RBRVS) and its conversion factor for advanced nursing practices carried out by critical care nurse practitioners (CCNP) in intensive care units. Methods: The methodology was developed by calculating CCNP's RBRVS for 32 advanced nursing services based on CCNP's workload and time spent in the context of national health insurance. A cost analysis was performed to estimate the conversion factor of CCNP's RBRVS. The share of CCNP's contribution to fee-for-service in intensive care units was also analyzed. Results: Calculation of the RBRVS of 32 advanced nursing practices showed a range of points from 100.0 to 1,181.4 and an average of 296.1 points. The relevant conversion factor for advanced nursing practices in CCNP were estimated at 37.3-48.4 won. The contribution rate of CCNP's advanced nursing practices in the relative value scale of the national health insurance was estimated at 0.1-31.3%. Conclusion: Measuring the economic value of advanced nursing services will be a basis for esta-blishing a reimbursement system for CCNP's practices and thus encourage a social demand for advanced nurse practitioners.

• 한국환경과학회지
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• 제19권5호
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• pp.543-548
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• 2010

This research was made to investigate the effects of burned, which is made in the early spring every year at Saebyeol-Oreum from 2003 to 2009, on changes in vegetation on the grassland. The results of analyzing the characteristics of the lay of the land showed that the proportion of the surface land that had the angle of azimuth and the angle of slope in the range of southeast $135^{\circ}{\sim}180^{\circ}$ accounting for 73.89% and $21^{\circ}{\sim}30^{\circ}$ accounting 58.33% of the entire surface land, respectively, was found to be highest. The results of the analysis showed that the relative importance value was found to be lowered from 27.07 in 2003 to 19.47 in 2009, and this can be attributable to the relative importance value of Artemisia japonica having been heightened from 7.07 in 2003 to 16.23 in 2009. The reason that the relative importance value of Artemisia japonica was found to be high is thought to be that vegetation on the surface land was removed by burned in the early spring and, due to this, the dry surface of soil and the high slope accelerated the soil erosion and could not provide proper environment of the growth and development for Imperata cylindrical and Miscanthus sinensis, so Imperata cylindrical and Miscanthus sinensis were excluded and Artemisia japonica whose importance value had been highest have flourished. Researches to maintain the current vegetation on the burned location of Saebyeol-Oreum and to adjust physical characteristics of soil to restore vegetation and the proper time and cycle of burned should be conducted.

• 한국식품과학회지
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• 제16권4호
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• pp.437-442
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• 1984

건조통고추를 상대습도 11%에서 84%까지 7단계의 상대습도별로 $5^{\circ}C$, $15^{\circ}C$, $25^{\circ}C$, 및 $35^{\circ}C$ 온도구에 저장하면서 통고추의 변색 및 흡습특성을 조사하였다. RH 67% 이상에서는 갈변현상이, RH 84% 이상에서는 곰팡이가 발생하였고 RH 32% 이하에서는 탈색현상이 나타났다. 따라서 50% 내외의 RH 조건이 저장에 적합하였으며 탈색도 기준에서 저장 안전 수분함량은 $15.\;65{\sim}\;19.\;62%$ (DB) 였으며 이들 건조통고추의 monolayer value는 $5^{\circ}C$에서 9.23% (DB), $15^{\circ}C$에서 8.42% (DB), 25에서 7. 96% (DB) 및 $35^{\circ}C$에서 7. 52% (DB) 로서 온도가 낮을수록 monolayer value 는 다소 높아지는 경향을 보였으며 상대습도에 따라서 평형수분함량을 예측할 수 있는 3차 회귀방정식을 도출하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제22권12호
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• pp.1693-1702
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• 2009

Economic values of 14 production and functional traits for two Slovak dairy sheep breeds (Improved Valachian and Tsigai) were calculated. Semi-extensive production systems with one lambing per year were simulated using a bio-economic deterministic computer model. The marginal economic value of a trait was defined as the partial derivative of the profit function with respect to that trait. The relative economic value expressed the percentage proportion of standardized economic value (marginal economic value${\times}$genetic standard deviation) of a trait in the sum of the absolute values of the standardized economic values over all traits. Milk yield was of highest relative importance (26% and 32% in Improved Valachian and Tsigai) followed by productive lifetime and conception rate of ewes (16% and 15% in Improved Valachian and Tsigai, in both traits). Conception rate of female lambs and litter size had nearly the same relative economic importance in both breeds (9% to 11%). Survival rate of lambs at lambing and till weaning reached slightly lower economic values (4% to 7%). The economic importance of all remaining traits was less than 4%.

• 보건의료산업학회지
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• 제11권3호
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• pp.23-35
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• 2017

Objectives : This study analyzed the trends of patient costs in 7diagnosis-related groups(DRG) since July 2013 when the government made it mandatory for all hospitals and clinics. Methods : Data were collected from the 7DRG score chart published by the Ministry of Health and Welfare(MoHW) from July 2013 to January 2017. The average value of the weekday relative value scale was multiplied by unit price, referred to as'- "patient costs by disease group"-' and they were analyzed by time series. Results : Patient costs had increased among all patients with a comprehensive disease. Small and medium-sized hospitals (hospitals and clinics) showed a slight increase in patient costs. Conclusions : Enforcement of the Korean diagnosis-related groups has led to management crisis in small and medium-sized hospitals and deterioration medical service quality. To solve this problem, The weekday relative value scale of small and medium-sized hospitals should be increased significantly.

• 지식경영연구
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• 제22권2호
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• pp.289-300
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• 2021

부동산 시장에 정보기술이 적용된 프롭테크는 다양한 가치창출모델들을 제시하면서 부동산 거래혁신을 이끌고 있다. 본 연구에서는 프롭테크에 기반한 비즈니스에서 창출 및 공유되고 있는 가치를 분류하여 이해하는 동시에, 개별 가치 영역 간의 상대적 중요도를 반영한 평가자료를 개발하고자 한다. 이를 위하여 프롭테크의 가치창출 차원을 위계적으로 구성하였고, 다종 산업이 혼재되어 있는 프롭테크 산업의 하위 산업에 대한 상대적 가치창출 정도를 평가하였다. 제안된 지표 간의 상대적 중요성을 파악하기 위하여 업계 및 학계 전문가를 대상으로 AHP 분석을 시행하였다. 1단계에서는 무형적 가치, 관계적 가치, 고도화 가치를 제시하였으며, 2단계의 분해과정을 거쳐 총 9개 평가지표들의 이원 비교를 통하여 지표 간 가중치를 도출하였다. 본 연구는 프롭테크 산업의 부문별 가치창출 정도를 평가해 봄으로써, 향후 한국 프롭테크 생태계 전반의 가치창출 역량 향상 및 발전을 도모하고자 하였다.

• 한국경영과학회지
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• 제27권3호
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• pp.145-156
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• 2002

Business managers are often required to use LP problems to deal with uncertainty inherent in decision making due to rapid changes in today＇s business environments. Uncertain parameters can be easily formulated in the two-stage stochastic LP problems. However, since solution methods are complex and time-consuming, a common approach has been to use modified formulations to provide upper and lower bounds on the two-stage stochastic LP problem. One approach is to use an expected value problem, which provides upper and lower bounds. Another approach is to use “walt-and-see” problem to provide upper and lower bounds. The objective of this paper is to propose a modified approach of “wait-and-see” problem to provide an upper bound and to compare the relative error of optimal value with various upper and lower bounds. A computing experiment is implemented to show the relative error of optimal value with various upper and lower bounds and computing times.

• 산업경영시스템학회지
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• 제45권4호
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• pp.167-173
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• 2022

Investors must adopt profitable investment opportunities to maximize their wealth. Almost all investment, finance, engineering economics textbooks explain that net present value (NPV) measures the profitability (or value) of investment opportunities in absolute size, and internal rate of return (IRR) measures the profitability of investment opportunities in relative proportions. However, NPV is a measure of the relative size of the return on investment opportunity to do-nothing alternative. Moreover, IRR can occur in multiple investment opportunities and may not exist. To make matters worse, IRR and NPV also have conflicting problems in accept-or-reject decisions. In this study, the reason why NPV and IRR cannot accurately measure the profitability of investment opportunities is identified, and fundamental characteristics that investment opportunity profitability measures should have are presented.