• 수산경영론집
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• 제39권1호
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• pp.115-132
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• 2008

This study raises the question about why do many international fisheries organizations or regional fisheries agreements come into existence, sustain, and develop prior to the internationally recognized institution such as United Nations Convention on the Law of the Sea(UNCLOS). In oder to solve the problem, I will investigate the characteristics of fisheries as renewable resources and propose the collusion model where it is based on the cost-benefit analysis. Especially, if once a fooall large number of fishing is implemented, they are immediately depleted. Consequently they are extinct and no longer exploitable. Thus each interest nations or participants will be better off if they are cooperative and will be worse off if they are competitive or noncooperative in a resource management. Therefore, many of the internationally recognized fisheries institutions and agreements have been made and developed in these days.

• 한국구조물진단유지관리공학회 논문집
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• 제22권4호
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• pp.37-41
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• 2018

최근 시설물의 안전 및 유지관리에 관심이 증대되고 있으나, 발주처의 저가발주로 인해 안전진단전문기관은 부실화 되고 부실 점검 및 진단으로 인한 많은 문제점들이 야기되고 있다. 따라서 본 연구에서는 실무자들의 인식조사와 사례분석을 통해 실행대가 현황을 고찰하였으며, 그 결과 정밀안전점검은 대가기준 조정보다는 대가기준의 효율성 증대 및 강제성 강화가 필요한 것으로 판단된다. 또한 정밀안전진단은 연면적 $10,000m^2$미만 시설물에 대한 대가기준 설계금액을 현재 기준에서 80%로 하향조정하고, 그 이상의 시설물에 대해서는 현행 대가기준을 적용하되, 대가기준의 강제성 강화가 필요할 것으로 판단된다.

• 한국기계가공학회지
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• 제14권3호
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• pp.1-8
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• 2015

Recently, a great interest in 3D printing has emerged, although many existing 3D printing technologies were first developed 2-3 decades ago. There are many mature 3D printing processes and materials; however, active research and development efforts are ongoing in this area to advance the technologies. Several companies have already started to use 3D printed parts as actual components. Many low-cost 3D printers have been released on the market, which are of particular interest to educators and hobbyists. This paper provides a brief review of 3D printing technologies and research trends. In addition, several state-of-the-art technologies and applications are introduced.

• 한국건설관리학회논문집
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• 제13권6호
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• pp.71-83
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• 2012

최근 행정중심복합도시와 혁신도시, 미군기지 이전사업을 중심으로 건설공사에서의 비용절감 및 품질향상, 기술개발 및 가치구현을 목적으로 기술제안입찰방식 적용이 확대되고 있다. 이로 인하여 기술제안입찰에서 중요 평가항목 중의 하나인 '생애주기비용 개선방안'에 대한 관심이 높아지고 있으며, 특히 건축물 생애주기비용에 대한 신뢰성 확보 및 객관적인 평가를 수행할 수 있는 방안을 마련하기 위해 노력하고 있다. 하지만 기술제안입찰에서의 생애주기비용 개선방안에 대한 적용사례의 부족, 원안에 대한 초기공사비의 왜곡, 불변가와 현재가의 혼재, 입찰업체간 산정기준의 모호성, 용어의 불명확성, 작성양식의 미흡 등의 문제점이 지적되고 있는 실정이다. 따라서 본 연구에서는 기술제안입찰에서의 평가항목 중 생애주기비용 개선방안에 대한 참여업체별 변별력을 확보하고 체계적인 생애주기비용 평가를 수행하기 위하여 작성지침 및 분석기준, 작성양식에 대한 개선방안을 제시하였다.

• 산업경영시스템학회지
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• 제17권30호
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• pp.135-145
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• 1994

There has been increasing interest in modeling the effect of buffer stock in automatic flow lines such as transfer line, assembly line and process line. The purpose of this paper is to determine the optimal buffer stock for a two-stage process line of industry that minimize a expected cost considering line efficiency and buffer stock Analytical method for the simplified model is applied and computer simulation is conducted to real numerical example.

• 한국인공지능학회지
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• 제6권1호
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• pp.1-10
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• 2018

Compressed Air is an important energy source used in most factories nowadays. The automation trend using air compressor has been gradually increasing with the interest of the 4th industry in recent years. With the air compressor system, it is possible to construct the device at low cost and easily achieve automation and energy saving. In addition, With trend of FA, miniaturation and light weight manufacturing trend expand their use in the electronics, medical, and food sectors. Research method is to design the technology for the remote control of the following information as USN base. Development of flexible sensing module from real time observation module for fusion of IT technology in compressed air systems, design and manufacture of flexible sensing module, and realiability assessment. Design of real-time integrated management system for observation data of compressed air system - Ability to process observation data measured in real time into pre-processing and analysis data. This study expects unconventionally decreasing effect of energy cost that takes up 60~70% of air compressor layout and operation and maintenance management cost through USN(Ubiquitous Sensor Network) technology by using optimum operational condition from real time observation module. In addition, by preventing maintenance cost from malfunction of air compressor beforehand, maintenance cost is anticipated to cut back.

• The Journal of Asian Finance, Economics and Business
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• 제7권7호
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• pp.15-25
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• 2020

This empirical research aims to identify the relationship between fiscal and financial macroeconomic fundamentals and the volatility of government bonds' borrowing cost in an emerging country - Vietnam. The study covers the period from July 2006 to December 2019 and it is based on a sample of 1-year, 3-year, and 5-year government bonds, which represent short-term, medium-term and long-term sovereign bonds in Vietnam, respectively. The Generalized AutoRegressive Conditional Heteroskedasticity (GARCH) model and its derivatives such as EGARCH and TGARCH are applied on monthly dataset to examine and suggest a significant effect of fiscal and financial determinants of bond yield volatility. The findings of this study indicate that the variation of Vietnam government bond yields is in compliance with the theories of term structure of interest rate. The results also show that a proportion of the variation in the yields on Vietnam government bonds is attributed to the interest rate itself in the previous period, base rate, foreign interest rate, return of the stock market, fiscal deficit, public debt, and current account balance. Our results could be helpful in the macroeconomic policy formulation for policy-makers and in the investment practice for investors regarding the prediction of bond yield volatility.

• 한국전자통신학회논문지
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• 제11권5호
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• pp.505-510
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• 2016

최근 기술의 발달로 증강현실에 대한 관심은 급속히 증가하고 있다. 증강현실은 학습자의 시각, 청각, 촉각 등을 활용하여 다양한 만족감을 주고 있으며, 학습자에게 몰입감과 흥미감을 증진시킨다. 본 논문에서는 증강현실을 활용하여 영유아 기초 미술 교육을 위한 드로잉 시스템을 제안한다. 이것은 영유아들에게 그림을 쉽게 접하고 쉽게 그릴 수 있도록 도와줌으로써 몰입감, 성취감, 흥미감을 줌과 동시에 적은 비용으로 효과적인 미술지도학습을 할 수 있다.

• Journal of Nutrition and Health
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• 제36권5호
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• pp.528-535
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• 2003

The purposes of this study were: 1) to investigate the operational and financial characteristics of contract-managed high school food services in Seoul, 2) to analyze the financial performance of high school food services 3) to develop guidelines for meal pricing and facilities investment costs. From Oct to Nov 2001, questionnaires were mailed to 249 high schools that were managed by contract food service companies. A 40.2％ response rate was recorded. The results of this study were as follows: 1. Student enrollment in high schools run by contract-managed food services was 1,518, with a 68.5％ participation rate in the school lunch program. The average meal price was 2,141 won. 2. Based on the income statement analysis, average total sales were 410,440,504 won and average net profit was 16,098,558 won. 3. The optimum food cost per meal was 1,200-1,300 won per meal, calculating using the methods of conversion factor, RDA (Recommended Daily Allowance), and nutrient exchange unit. 4. Guidelines for meal pricing were developed using the modified actual pricing method based on facilities investment cost, number of meals and food cost. The ratio of labor cost, general management expenses and ordinary profit were adopted from the schools with liability. The food cost, depreciation and interest cost were calculated based on unit meal. 5. The guideline for facilities investment was developed based on the number of meals, meal price and food cost. The guideline included the maximum facilities investment cost paid by the contract food service management company. (Korean J Nutrition 36(5): 528∼535, 2003)

• 설비공학논문집
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• 제19권6호
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• pp.470-475
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• 2007

The present study has been conducted economic analysis through actual operation of electric heat pump (EHP) and gas engine driven heat pump (GHP) which are installed at the same building in the university. Cost items, such as initial cost, annual energy cost and maintenance cost of each system are considered to analyze life cycle cost (LCC) and economical efficiencies are compared. The initial cost is considered on the basis of actual cost, and annual energy cost is converted into the cost after measuring electricity and gas consumption a day LCC applied present value method is used to assess economical profit of both of them. Variables used to LCC analysis are electricity cost escalation rate, natural gas cost escalation rate, interest rate, and service lives when each of them are 4%, 2%, 8%, and 20 years. The result shows that EHP (148,257,306 won) is more profitable than GHP (161,239,296 won) by 8.05% (12,981,990 won).