• 한국정보통신학회논문지
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• 제8권3호
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• pp.670-678
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• 2004

한의학에서 경락은 생체에너지의 전달 통로이며, 진단치료의 기본대상이다. 그러나 서양의학에서는 경락을 신경-면역계통의 활동통로로 간주하고 있다. 침구치료 효과를 단순한 자극에 의한 인체의 반응으로 간주하고 있다. 본 논문에서는 시술자의 생체에너지가 전달될 때와 전달되지 않을 때, 즉 절연자침과 비절연자침을 시행하였을 경우, 경락과 비경락에서의 전위를 측정하였다. 그 결과 비절연자침 시행시에는 각 시술에 대한 반응이 뚜렷하게 나타나고 있으나 절연자침 시행시에는 첫 번째 자침 시술에만 반응하였다. 이는 침구치료의 효과가 단순한 침자극에 의한 효과라기 보다는 시술자의 생체에너지 전달과 더 밀접한 관계가 있음을 의미한다. 따라서, 침 자극에 의한 생체에너지 전달에 의한 인체의 반응을 전위의 변화로 분석하여 침구치료효과를 규명하였다.

• Korean Chemical Engineering Research
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• 제46권5호
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• pp.833-844
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• 2008

바이오에너지는 화석연료의 소비를 감소시키는 기회를 제공한다. 태양, 바람, 수력발전 및 지열, 그리고 바이오매스 자원으로부터 생성된 에너지는 재생이 가능하다. 대부분의 바이오에너지들은 태양으로부터 직 간접적으로 생산되기 때문에 화석연료와 달리 신재생에너지의 충분한 공급이 가능하다. 또한 바이오에너지의 이용은 환경적인 측면 뿐 아니라 정치, 경제적으로 이익을 제공한다. 바이오에너지는 이산화탄소의 순증가가 없고 무공해의 에너지 형태를 제공하는 해양 자원으로부터 생산 될 수 있다. 본 총설에서는 지구의 약 75%가 바다로 이루어져 있음을 고려해 볼 때 바이오에너지 생산을 위한 해양 바이오매스의 잠재력에 대해 검토한다.

• 한국수소및신에너지학회논문집
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• 제26권5호
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• pp.484-492
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• 2015

As our government is actively introducing the RPS (Renewable Portfolio Standards) as a national renewable energy obligation policy, power producers are using the various renewable energy to meet the RPS supply quota since 2012. Recently, it is appling to use power bio-fuel oil in bio-fuel oil demonstration project with power companies. In general, power bio-fuel oils are composed of mixture products of vegetable oil, animal fat, fatty acid ester and waste oil. It is already developing for a power plant as a renewable energy abroad. In Korea, it is studying a 100% combustion and blended combustion of heavy fuel oil and bio-fuel oil. In this study, we investigated fuel characteristics of mixed power bio-fuel oil and its emission performance. Especially, it was reduced emissions of bio-oil in industrial boilers due to bio-fuel properties as compare with fuel oil.

• 한국태양에너지학회 논문집
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• 제28권6호
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• pp.58-63
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• 2008

It is essential to investigate the structure and the main characteristic of Home USN (Ubiquitous Sensor Network) technologies in built ubiquitous environment while designing bio-sensors. For this study, Thermistor elements and Thermopile black body have been selected to implement ubiquitous technologies for bio-sensors and wireless network such as WiBro has been used to transfer sensing data to the BSN (Bio-Sensor Network) gateway. It is certain that efficiency of ubiquitous space design is improved if main components of each specific sensor network are analyzed precisely in digital way and corresponding communication modules are prepared accordingly. Ubiquitous technology, in conclusion, has to be applied not only with systematical mechanism or electronic setting but in human-centered atmosphere as well, keeping with deep consideration for bio-housing service factors in eco-friendly surrounding.

• Journal of Plant Biotechnology
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• 제40권4호
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• pp.185-191
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• 2013

Over the past decades, carbon dioxide concentration of the atmosphere of the world has increased significantly, and thereby the greenhouse effect has become a social issue. To solve this problem, new renewable energy sources including solar, hydrogen, geothermal, wind and bio-energy are suggested as alternatives. Among these new energy sources, bio-energy crops are widely introduced and under rapid progress. For example, corn and oilseed rape plants are used for the production of bio-ethanol and bio-diesel, respectively. However, grain prices has increased severely because of the use of corn for bio-ethanol production. Therefore, non-edible switchgrass draws attention as an alternative source for bio-ethanol production in USA. This review describes the shortage of fossil energy and an importance of switchgrass as a bio-energy crop. Also, some characteristics of its major cultivars are introduced including growth habit, total output of biomass yields. Furthermore, biotechnological approaches have been conducted to improve the productivity of switchgrass using tissue culture and genetic transformation.

• 한국유기농업학회지
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• 제17권1호
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• pp.1-17
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• 2009

The production of bio-energy crops is a major research project in the emphasizing the "low carbon green growth" strategy. For this, the possibility of the introduction of the new energy crops improve the agricultural income from fanning must be diagnosed. This study describes the level of agricultural income per unit area by cropping system based on the income of crops in the field. Especially, we have chosen the southern part attracting the attention in the possible area of the bio-energy crop production. This study consists of five chapters. Chapter I is the introduction. Chapter II is on the status of the southern part cropping system and the analysis of the economic value. Chapter III is on the economic value analysis introducing new bio-energy crops. Chapter IV is on the comparative analysis for the economic value of the croping system introducing new bio-energy crops. Chapter V is the conclusion.

• 한국수소및신에너지학회논문집
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• 제28권6호
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• pp.704-711
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• 2017

Korea, which has a high dependency on energy imports, is greatly affected by fluctuations in international oil prices. In order to offset these effects, various policies such as 'diversification of energy sources' and 'energy mix' are being pursued. Renewable Fuel Standard (RFS) is a policy promoted for this purpose, and a compulsory mixing system is applied only to the diesel. In order to reduce dependence on fossil fuels in various countries, they are concentrating on the dissemination of bio-alcohol as well as bio-diesel, and commercialization through various verification. In this study, evaluation of domestic materials and vehicles was carried out to promote domestic bio alcohol fuel. We analyzed the fuel characteristics of domestic quality standard items by mixing them with gasoline of automobile at a certain mixing ratio (0%, 3%, 6%, and 10%).

• BioChip Journal
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• 제12권4호
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• pp.280-286
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• 2018

Hydrogel scaffolds composed of multiple components are promising platform in tissue engineering as a transplantation materials or artificial organs. Here, we present a new fabrication method for implementing multi-layered macroscopic hydrogel scaffold composed of multiple components by controlling height of hydrogel layer through precise control of ultraviolet (UV) energy density. Through the repetition of the photolithography process with energy control, we can form several layers of hydrogel with different height. We characterized UV energy-dependent profiles with single-layered PEGDA posts photocrosslinked by the modular methodology and examined the optical effect on the fabrication of multi-layered, macroscopic hydrogel structure. Finally, we successfully demonstrated the potential applicability of our approach by fabricating various macroscopic hydrogel constructs composed of multiple hydrogel layers.

• 에너지공학
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• 제22권2호
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• pp.184-196
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• 2013

경제 발전과 산업의 발달로 화석연료를 대체할 신재생에너지 개발의 필요성이 대두되고 있다. 환경과 에너지 문제를 동시에 해결할 수 있는 에너지 개발이 필수적이며, 그 대안으로 해양 미생물에 기초한 신재생에너지 개발이 해결방법으로 떠오르고 있다. 정부의 제3차 신 재생에너지 기술개발 및 이용 보급 계획에 근거하여, 2030년까지 바이오에너지 부분의 50%인 500만TOE를 해양 바이오에너지에서 생산하려 한다. 본 연구는 국가 경제에서 해양바이오에너지 개발사업이 국내 경제에 미치는 파급효과에 대하여 산업연관분석을 적용하여 분석하고자 한다. 생산유발, 부가가치 유발, 취업유발에 미치는 효과 및 연구개발 유발효과 4가지를 분석하되, 수요유도형 모형을 적용한 분석 결과를 제시한다. 한국은행 산업연관표 기본부문 기준 403부문 중에서 66개 부문을 해양 바이오에너지 관련 부문이라 정의한 후, 해양바이오에너지 관련 부문을 중심에 놓고 이를 외생화하여 분석한다. 해양바이오에너지 개발사업에 2,234억원의 예산이 투입되면, 생산유발효과 3,123억원, 부가가치 유발효과 865억원, 취업유발효과 1,151명, 연구개발 유발효과 47.8억원으로 분석되었다. 이러한 정량적 정보는 해양바이오에너지 개발사업의 상용화에 대한 정책 결정에 활용될 수 있다.

• 한국정밀공학회지
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• 제22권6호
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• pp.199-206
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• 2005

In this work, a theoretical investigation on the energy harvesting is undertaken using one of potential smart materials; piezoelectric material. The energy equations fur both square and circular types of the piezoelectric material are derived, and the energy generated from two commercially available Products: $PZT (Lead/Zirconium/Titanium: Pb(Zr,\;Ti)O_3)$ and PVDF (polyvinylidene fluoride) are investigated in terms of the thickness and area. In addition, a finite element analysis (FEA) is undertaken to obtain the generated energy due to the uniform pressure applied on the surface of the piezoelectric materials. A comparative work between the theory and the FEA is made followed by the brief discussion on the usage of the harvested energy for Bio MEMS.