• 한국축산시설환경학회지
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• 제21권3호
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• pp.93-98
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• 2015

The objective of this study was to review application of next-generation sequencing (NGS) to investigate microbiome in the livestock sector. Since the 16S rRNA gene is used as a phylogenetic marker, unculturable members of microbiome in nature or managed environments have been investigated using the NGS technique based on 16S rRNA genes. However, few NGS studies have been conducted to investigate microbiome in the livestock sector. The 16S rRNA gene sequences obtained from NGS are classified to microbial taxa against the 16S rRNA gene reference database such as RDP, Greengenes and Silva databases. The sequences also are clustered into species-level OTUs at 97% sequence similarity. Microbiome similarity among treatment groups is visualized using principal coordinates analysis, while microbiome shared among treatment groups is visualized using a venn diagram. The use of the NGS technique will contribute to elucidating roles of microbiome in the livestock sector.

• 자원ㆍ환경경제연구
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• 제19권1호
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• pp.3-21
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• 2010

발전부문의 부분적인 민영화 이후 전력의 도매가격은 한계가격(system marginal price)으로 결정되고, 이 가격은 발전사의 발전량에 의해서 달라지기 때문에 발전사 입장에서는 완전히 외생적으로 결정되는 가격이라 보기 어렵다. 본고는 Harrison(1994), Levinsohn(1993) 등이 개발한 시장의 완전경쟁성이 유지되지 않을 때에도 기업의 생산성 변화와 규모수익성, 마크업률 등을 분석할 수 있는 모형을 한국의 화력발전소 자료에 적용하였다. 분석결과 규모수익은 거의 없으며, 마크업률은 발전소의 사용 에너지 유형에 따라 크게 다른 것으로 나타났다. 아울러 완전경쟁시장을 가정하는 통상적인 분석법에 비해 발전소의 생산성 변화율 계측치도 상당한 정도 차이를 보였다.

• 신재생에너지
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• 제18권2호
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• pp.50-59
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• 2022

The Korean government announced the "1st Basic Plan for the Transition to Hydrogen Economy" in 2021 and declared the establishment of a hydrogen industry ecosystem by 2040. To build a low-carbon power system, resources that can efficiently accommodate renewable energy are required, and green hydrogen is considered a potential solution. This study analyzed the economic feasibility of green hydrogen-based sector coupling to reduce curtailment of renewable generation in the Jeju power system by 2025 under the scenario of with or without HVDC#3. The result showed that HVDC#3 significantly reduced the frequency of curtailment from 16.1% to 3.0%. In addition, green hydrogen-based sector coupling was an economically feasible option as result showed an IRR of 4.86% when HVDC#3 was connected and 11.45% when it was not under the condition of achieving 50% curtailment reduction. This study shows that the higher the level of renewable energy deployment, the more delayed the HVDC connection between Jeju and the main land, and the lower the SMP, the more economically feasible the green hydrogen-based sector coupling is. Furthermore, this study suggests that the policy goal of completely reducing curtailment is not economically efficient.

• 전기학회논문지
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• 제66권4호
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• pp.605-612
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• 2017

One of the biggest environmental issues that our world has been facing is climate change. In order to cope with such environmental issues, the world is putting a great deal of effort into energy conservation. The building sector, in particular, consumes 36% of the energy consumed worldwide and emits considerable amount of greenhouse gases. Therefore, introduction of renewable energies in the building sector is highly recommended. Renewable energy sources that can be utilized in the building sector include sunlight, solar heat, geothermal heat, fuel cells and wind power. The wind power generation system which converts wind energy into electrical energy has advantages in that wind is an unlimited and pollution-free resource. It is suitable to be connected to existing buildings because many years of operational experience and the enhanced stability of the system have made it possible to downsize the electrical generator. In case of existing buildings, it is necessary to consider the live loads of the buildings to connect the wind power generation system. This paper, through the connection of the wind power generation with existing buildings, promotes reduction of greenhouse gas emissions and energy independence by reducing energy consumption in the building sector. In order to connect the wind power generation system with an exciting building, the live load of the building and the area of the rooftop should be considered. The installable model is selected by comparing the live load of the building and the load of the wind power generation system. The maximum number of the wind turbines that can be installed is obtained by considering the separation distance between the wind turbines within the area of the rooftop. Installations are divided into single installations and multiple installations of two different types of wind turbines. After determining the maximum installable number, the optimal model that can achieve the maximum annual power generation will be selected by comparing the respective total annual amount of the power generation of different models.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 하계학술대회 논문집 A
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• pp.73-75
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• 1993

In recent years, it is widely being issued to consider the Non-Utility Generation (NUG) in the public electric utility sector. The Non-Utility Generation can be divided into two major parts, i. e., dispersed generation and privatization. In the participation of the NUGs in the public sector, the economy of scale and publiciy of the NUGs should be considered. In this paper, we with give the present status of Non-Utility Generation and. problems caused by the dispersed generation and privatization. Also, the analysis of the problems of NUGs and future policies of the electric utility will be discussed.

• 자원ㆍ환경경제연구
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• 제15권2호
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• pp.297-318
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• 2006

우리나라의 천연가스는 전량 해외로부터 수입하고 있으며, 도시가스와 발전용으로 나뉘어 사용되고 있다. 도시가스의 사용량은 빠른 속도로 늘어나고 있는 반면에, 발전용 가스가격을 통한 횡적보조 정책의 결과로 발전용 가스수요는 비중이 낮은 상태에 머무르고 있다. 이는 가스발전이 기저부하용으로 사용되고 있는 외국의 사례와 매우 상이한 결과라고 할 수 있다. 본 연구는 전원믹스를 둘러싼 제반 환경이 급속하게 변화하고 있음에 주목하여 천연가스 발전의 잠재적인 성장 추이를 조망해 보기 위한 것이다. 이를 위해 미래의 변화하는 환경을 시나리오로 작성하여 전원계획 기법에 의존하여 분석을 시도한다. 시나리오는 가설적이지만 현실적인 조건을 제시하는데 중점을 두었다. 원자력발전과 유연탄 그리고 천연가스 가격의 움직임에 대한 조건을 변화시키는 경우 늘어날 수 있는 발전용 천연가스의 잠재량을 시뮬레이션하였다. 에너지 믹스와 관련하여 현실적으로 개연성이 매우 높은 가설적 상황을 조건으로 하는 경우에 미래의 발전부문 천연가스의 잠재적 소요량은 매우 큰 폭으로 증가하는 것으로 나타났다. 현재의 계획에 비하여 400~500만 톤 정도 늘어날 것으로 전망되었다. 몇 가지 개연성이 높은 조건을 완화시키게 되면 빠른 속도로 수요가 늘어날 수 있음을 보여주고 있다.

• 산경연구논집
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• 제15권2호
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• pp.1-10
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• 2024

Purpose: The aim of this study is to examine the factors influencing prospects toward for the metaverse in both the public and private sectors, focusing on the perspectives of millennials and generation Z that were rarely examined in previous studies. Research design, data and methodology: This study employed an online survey as its research methodology utilizing factor analysis, ANOVA, and regression analysis to test the formulated hypotheses. Results: The findings of this study reveal that factors such as citizen/customer relationship management, the application of metaverse in both in the public and private sectors. Moreover, the effect size of applying the metaverse to cities on prospects toward the Metaverse was notably higher in the public sector. The effect size of metaverse management for customer relationship management showed a greater impact in the private sector. Conclusions: The results carry significant managerial and policy implications. They shed light on how millennials and generation Z perceive the applications of the metaverse in relation to cities, products, and brands. Notably, the results suggest that application of the metaverse for cities and management of customer relationships for products and brands emerge as key factors influencing the prospect of the metaverse in the public and private sectors.

• 유통과학연구
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• 제20권9호
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• pp.1-10
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• 2022

Purpose: Public sector is usually not an attractive career choice for the youths, due to the uncompetitive income and the working environment. Therefore, understanding the motivations of the Generation Z, the currently early-career employees, to work in the public sector is important. This research aims to address a gap in the literature on the linkage between Personality Traits of Generation Z and Public Service Motivation (PSM). Research Design, Data, and Methodology: Using the sample of Vietnamese generation Z, it shows how individual personality, as defined by the Big Five, affects PSM. A quantitative survey of 355 university students, who are members of this generation and are preparing to join the labor market, was undertaken. We used SEM to examine the results. Results: Our findings show that Agreeableness, Neuroticism, and Conscientiousness are significant antecedents of PSM. Agreeableness, which leads to three PSM dimensions, namely Compassion, Self-Sacrifice, and Commitment to Public Values, is the best predictor of this motivation. Meanwhile, Neuroticism and Conscientiousness only affect the dimension of Compassion. Conclusion: This study adds to the limited current knowledge on the personality-PSM relationship among generation Z. The distribution of affective (Compassion, Self-Sacrifice) and norm-based (Commitment to Public Values) motives provide insight for both career counselors and recruiters in public service delivery.

• 에너지공학
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• 제21권3호
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• pp.281-291
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• 2012

최근 세계경기가 회복되고 미국 및 중국 등 주요 국가들의 신성장동력산업 육성정책이 강화됨에 따라 신재생에너지의 글로벌 경쟁이 더욱 치열한 양상으로 전개되고 있다. 신재생에너지 개발의 일환으로 주요 선진국 및 우리나라도 풍력발전에 많은 자금을 투입하여 개발 및 풍력발전소 건설을 추진하고 있다. 세계 풍력발전 시장은 약 700억 달러 규모로 더욱 증가할 것으로 예상되며, 이에 우리나라도 풍력발전의 국내 설치뿐만 아니라 해외진출도 적극 고려하고 있다. 이러한 배경 하에서 본 연구는 산업연관분석을 이용하여 풍력발전의 해외수출이 국내 경제에 미치는 파급효과를 분석하고자 한다. 특히 경제적 파급효과로 생산유발효과, 부가가치 유발효과, 취업유발효과의 3가지를 분석하되, 수요유도형 모형을 적용한 분석 결과를 제시한다. 한국은행 산업연관표 통합소분류 기준 168부문 중에서 11개 부문을 풍력발전 관련 부문이라 정의한 후, 풍력발전 관련산업을 중심에 놓고 이를 외생화하여 분석한다. 1,000억원 규모의 풍력발전을 해외로 수출하였을 경우, 생산유발효과, 부가가치 유발효과, 취업유발효과는 각각 2,050억원, 678억원, 1,054명으로 분석되었다.

• 신재생에너지
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• 제8권1호
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• pp.8-17
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• 2012

The Korean government pushed ahead various policies to disseminate photovoltaic (PV), wind power, small hydro, bio-fuel, etc. Renewable energy system (RES) budget of the Korean government increased from 118 billion won of 2003 to 876.6 billion won of 2010. The R&D budgetary supports for RES increased by 6.8 times in the period 2003-2010. It is necessary to confirm RES budget expenditure that renewable energy promotion policy makes good performance evaluated in quantity level. This paper made Input-Output Table 2009 contains photovoltaic power generation equipment industry as a dependent sector and analyzed induced production effect by demand of photovoltaic power generation equipment industry. From the empirical analysis result, additional demand in photovoltaic power generation equipment induced 1.932 times of induced production in Korea. Each of industry sector has positive induced production from the additional demand in photovoltaic power generation equipment. Renewable energy promotion in photovoltaic power generation is considered together with industry policy as the option to sustain economic growth.