• 한국수산과학회지
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• 제56권5호
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• pp.716-720
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• 2023

This study was designed to analyze the effects of reducing water turnover in olive flounder Paralichthys olivaceus farms, focusing on olive flounder growth, decreasing electricity costs, and developing measures to ensure business stability. Daily water turnover was set at 18 in the control group and six in the experimental group. Juvenile fish were reared for 12 months. No significant differences in mean weight were observed between groups until five months. After five months, the mean weight of the control group grew significantly faster than that of the experimental group. Maintaining water turnovers leverl at six turnovers for the first five months after stocking juvenile fish and then increasing water turnover resulted in a 34.4% reduction in electricity costs compared to the control group. This approach presents a potential method to enhance the profitability of olive flounder farms and ensure stable productivity and profitability without sacrificing olive flounder growth.

• 한국소음진동공학회논문집
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• 제14권4호
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• pp.319-326
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• 2004

The soundscape is a novel attempt to offer comfortable sound environments at the urban public spaces by adding pleasant sounds and removing unagreeable ones. Most important factors to be considered therein are to determine what kind of sounds to offer and how to adjust them to the changing circumstances. But, installing, maintaining and adjusting the soundscape system directly in the field will ensue numerous problems as well as high costs. Thus, it is essential to devise a test method to analyse and verify the outcome before the actual installation in the field takes place. This study aims at devising the instrument system that enables to control. with a great ease, numerous variables. reproduce most agreeable sound sources, and can verify the effects on the virtual simulatory settings, which is named as Virtual Acoustic Field Simulation System (VAFSS).

• 한국의상디자인학회지
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• 제3권2호
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• pp.137-160
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• 2001

A study on the structural change in the U.S. textile industry. The U.S. textile industry has undergone significant changes over the last fifty years, including a steady decline in the relative scale of domestic production, employment reduction, and increased competition from imported products. In order to weather a crisis, the responses of the U.S. textile industry have been made such as investment in technology, specalization in the textile and apparel industries. The textile and apparel industries have taken steps to increase labor productivity through automations to speed management to create and introduce new products and new methods, and have lowered indirect overhead costs. Regarding these response of the U.S. and other situation of world textile and apparel trade market, much of the sense of crisis that pervades korean textile and apparel industries has to do with the problem of adjusting corporate policy.

• 한국전자거래학회지
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• 제6권2호
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• pp.143-157
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• 2001

There has been a need for predicting development efforts and costs of the system during the early stage of the software process and hundreds of metrics have been proposed for computer software, but not all provide practical support to the software engineer. Some demand measurement that is too complex, others are so esoteric that few real-world professionals have any hope of understanding them, and others violate the basic intuitive notions of what high-quality software really is. It is worthwhile that metrics should be tailored to best accommodate specific products and processes after grasping their good and no good point. This paper describes two size estimation techniques, the Karner technique and the Marchesi technique, and compares and analyzes them with proposed evaluation criteria. Both techniques are to estimate software size analyzed by use case that is mainly described during the object-oriented analysis phase. We also present an empirical comparison of them, both are applied in the Internet Medicine Prescription System. We also propose some guidance for experiments based on our analysis. We believe that it should be facilitating project management more effective by adjusting software metrics properly.

• Corrosion Science and Technology
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• 제7권5호
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• pp.252-258
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• 2008

The Committee on the Cost of Corrosion in Japan was organized in 1999 jointly by the Japan Society of Corrosion Engineering (JSCE) and the Japan Association of Corrosion Control (JACC). Corrosion cost as of FY1997 was estimated based on the Uhlig and Hoar methods similarly to that conducted in 1974. The estimated corrosion cost of 1997 was compared with that reported for 1974 with speculation on the change in industrial environment. The overall costs estimated by the Uhlig and Hoar methods for 1997 were 3,938 billion yen and 5,258 billion yen, respectively, which were equivalent to 0.77% and 1.02% of the GNP of Japan. The process of organization formation, procedures for analyses and the results of cost evaluation were described by adjusting a focus on transportation industry.

• 한국의류학회지
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• 제31권3호
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• pp.398-409
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• 2007

Today women's social participation is highly increasing, and especially the middle-aged women's activity is amazing. However, many ladies have trouble in wearing suits or jackets. Because the current ready-made apparels focus on young and slender women, and accordingly the current size system is made for them. So it is necessary to develop new size system for general ladies who are hardly well-proportioned figures. The survey of mid-life ladies in this Paper vividly reveals the above Problem. Many ladies dissatisfied with the fitness of the existing apparels. Therefore updating the current size system of ladies' apparels is badly needed. It also helps reducing corporates' stock-holding costs and customer's clothes-adjusting expenses.

• Asia pacific journal of information systems
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• 제1권1호
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• pp.117-145
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• 1991

IS changeback is regarded as an offective way to control the usage of computers and communication systems which are very much limited resources and whose costs are very high, In this paper, the problem of combining the optimal chargeback system which guarantees the efficiency with the Rawls'(1971) concept of fairness. Primary conclusion of this paper is that if the value function which represents the contributions of IS user to the firm's profit is evidit and there is no uncertainty about this contribution information, optimality can be achived without any loss of fairness using full cost allocation pricing. But if there is no significant differences among contribution of each user and there is no significant differences among users because of the managerial arbitrariness, From this point of view contingent chargeback system with which manager can find the golden middle between optimality and fairness by adjusting the 'efficiency coefficient' according to his/her organizational characterisics and environments is proposed. A heuristic of finding the appropriate efficiency coefficient is also suggested.

• 경영과정보연구
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• 제37권1호
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• pp.123-138
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• 2018

본 연구는 한국노동연구원의 사업체패널조사 1-5차년도 자료와 행정자료인 "고용보험 DB"를 결합하여 구축한 "사업체-근로자 연계자료"를 활용하여 사업체 근로자의 연령구성과 생산성 및 인건비와의 관계를 실증분석 하였다. 사업체의 생산성은 1인당 부가가치로, 인건비는 1인당 노동비용으로, 사업체 근로자의 고령화 정도는 근로자의 연령구성으로 측정하였으며 동적패널모형을 활용하였다. 분석 결과, 생산성과 인건비 모두 사업체의 35-39세 연령대 근로자의 비율을 중심으로 역U자의 모습을 보였다. 즉, 35-39세 연령대 근로자 대신 더 젊은층의 근로자 혹은 더 고령층의 근로자 비중이 증가하는 경우 생산성 및 인건비에 부(-)의 영향을 미치는 것으로 나타났다. 특히, 35-39세 연령대 근로자 대신 50세 이상 연령대 근로자가 증가할 때의 생산성 추정계수와 인건비 추정계수와의 차이가 30세 미만 연령대 근로자가 증가할 때의 생산성 및 인건비의 추정계수와의 차이보다 더 큰 것으로 나타났다. 이러한 분석 결과를 통해 고령근로자의 생산성 저하에 대한 기업의 우려는 타당하나, 동시에 기업은 이미 인건비 조정 등의 방법을 통해 고령근로자를 효율적으로 활용해 왔음도 확인할 수 있다.

• 한국버섯학회지
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• 제13권2호
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• pp.139-144
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• 2015

본 보고는 버섯재배 농장에서 사용하는 배지 재료 및 혼합배지의 수분함량; 입병한 배지의 배지량, 건조무게, 액체량, 가비중; 배지혼합기에 투입하는 배지재료의 건조량, 수분량, 재료별 혼합비율; 배지의 수분함량 조절을 위한 물 소요량과 보충량, 조제한 배지의 총량을 산출하는 계산식을 만들었다. 그리고 각각을 자동으로 계산하는 엑셀파일을 작성하였다. 이 계산식들과 엑셀파일은 병재배 농가에서 배지재료비 절감, 연중 병당 양분함량 및 수분함량 유지와 새로운 배지조성을 만들기 위하여 활용할 수 있을 것이다. 이때 매일 계속되는 재배과정에서 수량 기복이나 품질 저하를 최소화 하면서 연중 안정생산에 기여할 것으로 기대한다.

• 한국항만경제학회지
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• 제29권3호
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• pp.159-174
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• 2013

본 논문은 포항제철이 제품생산에 필요한 석탄 및 철광석 등 원료를 해외로부터 수입하기 위한 전용부두를 조성하여 사용하는 과정에서 발생되는 총물류비용, 즉 해상수송비용, 항만 선석 대기비용, 그리고 원료를 야드에 적재보관 하는 데 따른 재고비용 등의 발생이 서로 상충됨에 따라 각 비용발생 행태를 함수식으로 추정하여 그 비용의 합이 최소화 될 수 있는 적정 선형별 연간 배정 항차수 의사결정을 휴리스틱적 접근법으로 시도한 내용을 보여준다. 예를 들면, 해상 수송비용은 단위당 운송비를 낮추기 위해 선형을 대형화시키려는 유인이 있게 된다. 하지만 이러한 결정은 항만내 선석 제약으로 인해 대기비용이 지수적으로 급격히 증가하게 되어 이에 대한 절충점을 찾아야 만 총 물류비용을 최소화 시킬 수 있게 된다. 선형별 연간 배정 항차수를 독립변수로 하고 발생 비용들을 종속변수로 하여 휴리스틱적 회귀분석을 시도한 결과 15만톤급 선형, 10만톤급 선형, 5만톤급 선형의 연간 항차배정 비율이 $1.78(X_1)$ : $4.25(X_2)$ : $1(X_3)$ 로 될 때 총물류비용 최소화 목표를 달성할 수 있는 것으로 분석되었다. 이를 백분비로 보면, 대형선 비중을 약 25%, 중형선 비중을 약 61%, 그리고 소형선 비중을 약 14% 정도로 연간항차배정을 하는 것이 적정한 것으로 판단된다. 그밖에 만약 물동량의 증가로 항만확장이 불가피한 경우 추가항만 건설투자비와 그로 인한 해상수송비 절감 및 선석 대기비용 절감 등을 현재가치화 한 값과 비교하여 전자가 큰 경우는 투자안을 기각하고 후자가 큰 경우는 투자안을 수용하는 항만투자 의사결정이 필요함을 보여주었다.