• 한국수자원학회논문집
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• 제53권spc1호
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• pp.731-742
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• 2020

본 연구는 DEA를 적용하여 충청남도 기초지자체의 지방상수도 사업에 대한 효율성을 평가하였다. DEA는 여러 종류의 투입 요소를 이용하여 여러 종류의 산출물을 생산하는 유사한 목적을 위하여 결성된 의사결정조직들 간의 상대적 효율성을 평가하기 위해 사용되는 선형계획법의 하나이다. 분석 결과, 충남 15개 시·군 중 CRS 모형에서 7개, VRS 모형에서 8개 지역이 효율적인 지역으로 평가되었다. 반면 절반에 가까운 지역이 효율적이지 못한 것으로 나타났고, 투입과 산출 측면에서 비효율의 원인과 수준을 파악할 수 있었다. 특히 주로 군 지역이 비효율적인 것으로 추정되어 생산성 향상을 위한 개선 정책이 필요가 있음을 알 수 있었다. 본 연구는 충남 지역 지방상수도 운영과 관련된 전반적 의사결정에 시사점을 제공하였다는 점에서 의미가 있다.

• 상하수도학회지
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• 제25권3호
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• pp.325-334
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• 2011

Market Environment around water work industry is rapidly changing. ISO, International Organization for Standardization, announced the international water work service standard for comparison and evaluation between nations and businesses. And developed countries in water work are introducing market principle for growth of nation's water industry and reinforcement of its competitiveness. Also, some local governments entrusted their water utilities for improvement of competitiveness of water work. However, as some failure cases from overseas came out with emphasis, there are many refuting perspective about entrusted operation achievements of domestic water market. Hence, this paper evaluated competitiveness of domestic local water utilities from the perspective of productivity. After evaluating productivity using Malmquist productivity index, the authors compared and analyzed whether there is a difference of productivity between two different operating types by using Mann-Whitney test. As a result of analysis, it has shown that local water utilities achieved higher productivity at entrusted operation type rather than direct operation type. The local water utilities which chose entrusted operation had increased the productivity 13.9% on total factor productivity(TFP) during experimenting period, while the local water utilities which chose direct operation had increased 0.2%. The background of achieving this high productivity in entrusted operation was analyzed as a result of the higher technological effectiveness of a special water company. The result of this study can be referred when local government needs to decide on what operating types they will use.

• ALGAE
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• 제29권1호
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• pp.15-25
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• 2014

The number of species of non-native and invasive marine algae is growing, with concomitant public concern about native ecosystems and coastlines. Gelidium vagum, recently introduced from northeast Asia to Europe and North America, commonly occurs from the intertidal to subtidal zones in Korea, China, and Japan. To investigate the level of genetic diversity of native populations, we analyzed mitochondrial cox1 and cob from 108 specimens of G. vagum from Korea, China, eastern Russia, including from the Netherlands and USA. The haplotype network of individual and cox1 + cob datasets revealed no genetic structure in local populations, suggesting genetic flow between Korean populations. Our results corroborate a typical pattern of genetic diversity for introduced species, with low levels in introduced populations and high levels in native populations. All haplotypes were shared between the Netherlands and USA, but not between Korea and the Netherlands / USA except cox1. Additional sampling will identify donor populations in native northeast Asian waters. This is the first report of the utility of the mitochondrial coding cob sequences in red algae.