• 한국유기농업학회지
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• 제26권1호
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• pp.19-31
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• 2018

In general, an increase in consumer income increases interest in safe foods and increases consumption of environmental friendly foods. Meanwhile, even in Malawi, interest in safe food and environmentally friendly food has been increasing due to increase in per capita income, but research related to this has not been done yet. The purpose of this study is to estimate the value of environmentally friendly foods in Malawi consumers. For this purpose, we surveyed the consumption patterns and estimated the value of organic chicken for consumers visiting supermarkets. As a value estimation technique, Contingent Valuation Method (CVM) was used. Probit model analysis showed that price, expenditure on regular chicken, and knowledge of organic food affect the willingness to pay for organic chicken. CVM analysis shows that Malawi supermarket consumers are willing to pay MK2,514 (3.59) dollars per kilo of organic chicken, which is 25.7% higher than the average price of a regular chicken. Thus, Malawi supermarket consumers can deduce that they have a higher value for environmentally friendly food than regular food. These findings can be used in formulating policies on food safety by government officials, organic chicken meat marketing strategies by supermarket mangers, decision making to enhance organic food production by producers, in order to develop organic food industry.

• Journal of the Korean Data and Information Science Society
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• 제14권2호
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• pp.209-216
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• 2003

Contingent valuation method (CVM) is a main evaluation method of nonmarket goods for which markets either do not exist at all or do exist only incompletely; an example is environmental good. A dichotomous choice approach, the most popular type of CVM in environmental economics, employs binary discrete choice models as statistical estimation models. In this paper, we propose a semiparametric dichotomous choice CVM method using local linear model of Fan and Gijbels (1996) in which probability distribution of error term is specified parametrically but latent structural function is specified nonparametrically. The computation procedures of the proposed method are illustrated with a simple design of simulations.

• 자원ㆍ환경경제연구
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• 제10권3호
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• pp.387-412
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• 2001

This paper is to empirically test scope effects proposed to judge the internal consistency of contingent valuation method. The application was illustrated for the case of estimating people's WTP for improving water quality at Man Kyoung River in the Chon Buk area. The CV survey was carefully designed and implemented by carrying out recommendations from the NOAA Blue Ribbon panel. Using a split sample, we conducted the Cochran-Mantel-Haenszel test with the frequency distribution of no responses, calculated the Turnbull low bound mean for WTP, and measured the mean WTP from estimated variation functions. The test results consistently exhibited that the CV estimates of WTP were adequately responsive to the size of water quality changes being offered. The mean WTP for improving water quality suitable for swimming (5,171 and 5,212 won) was significantly larger than that for agricultural use and fishing activity (3,280 and 3,136 won).

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.650-655
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• 2009

In this study, a consumer willingness to pays for residential heating systems are estimated by economic valuation method. The major Korean residential heating systems in apartments are central heating system (CH), district heating system (DH), and individual heating system (IH). However, DH and IH systems are adopted in newly constructed apartments. Each heating system has own characteristics which residents can identify and value. 700 households in apartment were surveyed to analyze the preference of the residential heating systems and to estimate willingness to pay. We find that the households in DH system are more satisfied with their heating system than the households in other systems overall and that consumers prefer an apartment with DH system than with IH system and the willingness to pay for IH system is less than DH system. The results indicate that DH system has the relative premium which may be caused by the safety and the convenience to manage the system.

• 산업경영시스템학회지
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• 제29권1호
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• pp.143-150
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• 2006

Box-Cox model and T-factor method have been widely used to measure economic depreciations for industrial property. The Box-Cox model which combines economic efficiency with depreciation pattern is here extended to the reliability function. To do so a Rayleigh distribution which has been used to estimate the reliability of current assets was chosen as an efficiency curve of marginal productivity. Such an approach provides the possibility to classify the efficiency curves into four categories. It is also possible to analyze the types of depreciation curves. Therefore, the power family of a non-linear Box-Cox model could be set at certain constant values, then the model can be transformed into a linear model to estimate the economic depreciation rates by utilizing the reliability function. Estimating the resultant linear regression equation requires minimal number of observations, while at the same time facilitating the test of hypothesis on depreciation rates.

• 디지털콘텐츠학회 논문지
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• 제6권4호
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• pp.229-234
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• 2005

기업들은 소프트웨어의 품질 개발 속도 및 개발비용 둥의 문제를 해결하기 위한 새로운 대안으로서 오픈소스 소프트웨어 개발 접근 방법의 적용을 시도하고 있다. 한판 그 동안 오픈소스 소프트웨어에 대한 다양한 분석들이 이루어졌지만 실제 산업에서 소프트웨어 개발에 오픈소스를 활용하기 위한 구체적인 절차나 방법에 대한 적절한 연구의 결과가 없다. 본 연구에서는 기업이나 기관 개인이 오픈소스의 일부 또는 전체를 활용하여 소프트웨어를 개발하고자 할 패, 적절한 오픈소스를 식별 평가, 선정하여 변경, 적용하거나 제품화하기 위한 절차 모델을 제시하고자 한다.

• 한국소프트웨어감정평가학회 논문지
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• 제8권2호
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• pp.45-51
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• 2012

본 논문은 SOA 보안 취약점을 분석하기 위해 서비스 계층 구조상의 특징을 고려하여 취약점을 식별하고 평가한다. 제안된 분석방법은 모델기반 접근방법으로써, 안전한 서비스 모델을 도출하기 위해, 비즈니스 모델에서 보안요구사항을 표현하는 방법과 서비스의 취약점 식별 과정을 정의한다. 분석적 검증을 통해 제안된 방법이 유용성을 평가하였다.

• 한국소프트웨어감정평가학회 논문지
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• 제15권2호
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• pp.129-140
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• 2019

In the IoT environment, there is a huge amount of heterogeneous devices with limited capacity. Existing trust evaluation methods are not adequate to accommodate this requirement due to the limited storage space and computational resources. In addition, since IoT devices are mainly human operated devices, the trust evaluation should reflect the social relations among device owners. There is also a need for a mechanism that reflects the tendency of the trustor and environmental factors. In this paper, we propose an adaptable trust evaluation method for SOA-based IoT system to deal with these issues. The proposed model is designed to minimize the confidence bias and to dynamically respond to environmental changes by combining direct evaluation and indirect evaluation. It is expected that it will be possible to secure trust through quantitative evaluation by providing feedback based on social relationships.

• 한국구조물진단유지관리공학회 논문집
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• 제28권5호
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• pp.30-37
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• 2024

사회기반시설의 자산가치 평가는 일반적으로 정액법을 기반으로 상각후대체원가를 적용하고 있으나 시설물의 실제 가치를 정확히 반영하지 못하는 한계가 있다. 이에 교량의 성능을 합리적으로 고려하여 자산가치를 평가할 수 있는 성능기반 감가상각(PBD) 방법이 제안되었으나 개별 교량들의 환경 특성을 고려하지 못하였다. 본 연구에서는 기존 연구에서 제안된 PBD 방법에 개별 교량의 위험성을 고려할 수 있는 위험성-성능기반 감가상각(HPBD) 방법을 제안하고 적용성 검토를 위하여 8천여 교량을 대상으로 평가를 수행하였다. 교량의 열화 위험요인을 선정하고 개별 교량들의 위험성을 평가하여 위험성수준에 따른 가중치를 기존 PBD 방법에 적용하였다. 평가결과 PBD 방법과 유사한 현재가치와 상대적으로 높은 미래가치가 도출되었으며, 개별 교량의 위험 특성을 고려한 HPBD 방법이 보다 합리적인 가치평가와 의사결정에 활용 될 수 있을 것으로 판단된다.

• 충청수학회지
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• 제27권2호
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• pp.237-242
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• 2014

In this paper we provide a valuation method for multi-asset derivatives with single jump regime-switching volatilities. We suppse that volatilities of assets are affected by an n-dimensional independent Markov regime-switching process.