• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1061_1061
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• 2009

Running low of fossil fuel energy forces the industry to find a new way to overcome this energy crisis. One of the solutions is using the unlimited and everlasting energy sources like wind, sun, water, and so on. Especially, sun energy becomes the hottest issue in recent years because of its merit in installation, operation and abundant material source of silicon. In 2008, about 5.5GW photovoltaic (PV) system has been installed all around world. Many professional renewable energy organizations expect that the total PV system installation will be 30GW. To sustain the long-term stability of the PV system, several institutes perform the test based on IEC standards like IEC 61215 for silicon crystalline PV module and IEC 61646 for thin film PV module. Also in South Korea, Korea Institute of Energy Research (KIER) performs the certificate test according to IEC 61215 standards. In this paper, we want to summarize and inform the 3 years‘ test results of domestic and foreign PV modules. The specific and technical explanation will be shown in the following paper in detail.

• International conference on construction engineering and project management
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• 2013.01a
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• pp.87-93
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• 2013

In this research, a new methodology to perform building energy analysis using Industry Foundation Classes (IFC) standard has been studied. With the help of Archicad 14 modeling software, a 3D test model is generated and then exported to IFCXML format. A ruby code program retrieves the building information from the resulting IFCXML file using Nokogiri library. An INP file is created and gets ready for next energy analysis step. DOE 2.2 program analyzes the INP file and gives a detailed report of the energy cost of the building. Case study shows when using the IFC standard method, the Interoperability of the energy analysis is greatly improved. The main stream 3D building modeling software supports IFC standard. DOE 2.2 is able to read the INP file generated by IFC file. This means almost any 3D model created by main stream modeling software can be analyze in terms of energy cost Thus, IFC based energy analysis method has a promising future. With the development and application of IFC standard, designers can do more complex and easy-to-run energy analysis in a more efficient way.

• Journal of Forest and Environmental Science
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• v.20 no.1
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• pp.110-130
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• 2004

This study aims to study the definition and characteristics of forest biomass as an alternative energy and to estimate the energy potential and feasibility of forest biomass utilization in domestic. Especially, significant attention is given to woody biomass such as forest residue, thinning log, etc. due to their renewable, sustainable and abundant properties. The results were summarized as follows. The utilization of these forest biomass could play an important role to activate the forest industry and increase the public benefit functions of forest, but more attention on their utilization is required and how they can be utilize more efficiently is the new task assigned to our forestry for sustainable forest management.

• Journal of Energy Engineering
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• v.29 no.3
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• pp.50-56
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• 2020

Currently, 3D printing technology is a new revolutionary additive manufacturing process that can be used for making three dimensional solid objects from digital films. In 2019, this 3D printing technology spreading vigorously in production parts (57%), bridge production (39%), tooling, fixtures, jigs (37%), repair, and maintenance (38%). The applications of 3D printing are expanding to the defense, aerospace, medical field, and automobile industry. The raw materials are playing a key role in 3D printing. Various additive materials such as plastics, polymers, resins, steel, and metals are used for 3D printing to create a variety of designs. The main advantage of the green cement for 3D printing is to enhance the mechanical properties, and durability to meet the high-quality material using in construction. There are several advantages with 3D printing is a limited waste generation, eco-friendly process, economy, 20 times faster, and less time-consuming. This research article reveals that the role of green cement as an additive material for 3D printing.

• Journal of Korea Society of Digital Industry and Information Management
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• v.12 no.4
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• pp.41-49
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• 2016

Smart Grid is a next generation of new power growth electrical grid which provide high quality of electrical service by using Information Technologies to increase intelligence and performance. By using Smart Grid system, it can support energy management such as increase quality of electrical power, decrease energy and decrease emissions. However, Smart Grid uses information of energy consumption and when Smart Grid collects information, it will create private information. In this thesis, it will address issues of security private information which caused by Smart Grid for administrative measure and efficiency of Smart Grid in domestic. Also, cryptographic module algorithm, latest security solutions and strong wireless security policy for network environment such as wireless communication Iinternet are require for Smart Grid perform successfully and protect national power network equipment from cyber-attack and can stop leakage of user's personal information. Finally, it is urgent to prepare protection measures of National industrial facilities and power grid which can prepare for a cyber terrorism and penetration attacks and build emergency countermeasure management team for Smart Grid are require for safe Smart Grid environment.

• Transactions of the KSME C: Technology and Education
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• v.5 no.1
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• pp.69-77
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• 2017

Nanotechnology, along with Information Technology (IT) and Bio-technology (BT), has been regarded as a core area that will drive technological revolution of $21^{st}$ century. South Korea and other countries with advanced scientific and technological research programs are investing heavily in the field, and among its various aspects, nanomaterial industry is considered to be at the heart of this global competition. In this review, we look at nanomaterials industry from the perspective of mechanical engineering. Nanomaterials exhibit unique characteristics differing from those of micron, or sub-micron sized materials, and hence are potentially able to open up new opportunities. Specifically, environmental and biological sciences, energy, and catalysis are areas that are expected to benefit from these developments.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.150.2-150.2
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• 2011

본 연구에서는 풍력에너지 보급을 위한 신재생에너지정책의 포트폴리오의 구성이라는 최종 목적 하에 먼저 적용 가능 수단 및 주요 쟁점사항에 대하여 고찰해 보았다. 먼저 FIT(Feed in Tariff)와 RPS(Renewable Energy Portfolio) 등 대표적인 신재생에너지 보급 정책들과 선진국 사례들을 중심으로 적용 가능한 그 외의 정책에 대하여 검토해보았다. 또한 이러한 정책을 시행하였을 때 성공여부에 영향을 미칠 수 있는 국내 주요 정책 변수에 대하여 조사해 보고, 향후 예상되는 국내 산업환경변화를 고려하여 장기적 전략수립을 위한 기초 연구를 수행하고자 하였다. 특히 이 과정에서 신재생에너지산업정책에서 공통된 주요 이슈들과 블레이드의 대형화나 해상풍력발전 등 풍력산업에서 차별화되어 나타나는 이슈에 대하여 검토하고 이러한 이슈들을 정책 포트폴리오 구성에 충분히 반영할 수 있도록 함으로써 현실과 동떨어진 정책연구가 되지 않도록 노력하였다. 이러한 연구는 신재생에너지 강국으로 도약하기 위하여 태양광과 풍력산업을 중심으로 다양한 발전전략을 세우고 있는 우리나라에서 풍력발전산업의 활성화를 위한 장기전략 수립에 기여할 수 있는 정책적 함의를 제공할 수 있을 것이다.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.46 no.5
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• pp.61-68
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• 2014

The energy efficiency of papermaking process becomes more significant because of various new regulation of the energy consumption and the green house gas emission. In this study, the effects of wood powder addition on the drainage and the drying efficiency of the OCC based paper products, linerboard, were deeply investigated for improving energy efficiency. The fractionation of wood powder depending on the size were conducted. The bigger size of wood powder resulted in the higher bulk and the higher drainage efficiency, but the lower paper strength. The drying efficiency were in detail evaluated depending on the drying process level. In the first section of drying process until the 80% solid level, there were no significant changes in the drying efficiency by the addition of wood powder. However, after the 80 % solid level, the drying efficiency was greatly improved by the addition of wood powder. Those results showed the addition of wood powder could greatly affect not only the drainage in forming and wet pressing but also the drying process.

• Journal of Radiation Industry
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• v.8 no.2
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• pp.77-81
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• 2014

Hyaluronic acid is a disaccharide polymer that consists of glucuronic acid and N-acetylglucosamine, and is a glycosaminoglycan. It is widely distributed in animal connective tissue, coexisting with chondroitin sulfate. It forms viscous secretions or gel by bonding to protein in the body, and thus maintains and lubricates tissue structures. In addition, its antibiotic properties are applied to cosmetics and pharmaceuticals. Therefore, it has recently been an object of great interest at cosmetic and pharmaceutical companies. $^{125}I$ has a longer half-life (59.4 days) than many other radioisotopes, and is therefore useful to long-term studies. In this study, a facile and efficient procedure for the synthesis of $^{125}I$-labeled hyaluronic acid has been designed for in vivo imaging and pharmacokinetic studies of hyaluronic acid, which are required for the development of new drugs.

• Journal of Radiation Industry
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• v.10 no.4
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• pp.199-204
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• 2016

The dependence of cell survival on exposure dose and the duration of the liquid-holding recovery (LHR) was obtained for diploid yeast cells irradiated with ionizing radiation of different linear energy transfer (LET) and recovering from radiation damage without and with various concentrations of cisplatin - the most widely used anticancer drug. The ability of yeast cells to recover from radiation damage was less effective after cell exposure to high-LET radiation, when cells were irradiated without drug. The increase in cisplatin concentration resulted in the disappearance of this difference whereas the fraction of irreversible damage was permanently enlarged independently of radiation quality. The probability of cell recovery was shown to be constant for various conditions of irradiation and recovery. A new mechanism of cisplatin action was suggested according with which the inhibition of cell recovery after exposure to ionizing radiations was completely explained by the production of irreversible damage.