• Journal of the Korea Furniture Society
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• v.12 no.1
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• pp.131-142
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• 2001

Cultural needs of human have grown enormously. Consumer trend and individual taste have become more individualistic and diversified. Efforts to improve the quality of life have changed the concept of lift space as well as the concept of interior life supplies. Products are no longer standardized and produced in massive scale, thus a shift of value has risen. Damages done by the economical development have made consumers take interests in products that are more natural and in harmony with human beings. It is a tendency that wooden materials are becoming a preference as a specific alternative. There is a great social change with a new paradigm like this. Considering the change, we propose a new vision and activation plan on design development of wooden products through specific and practical studies by the system of educational and industrial cooperation which is an organic association system for developing human resources of educational system and producing profits of industry. From it, we can expect great effects as a competitive design of coming future.

• Journal of Life Science
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• v.33 no.5
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• pp.383-390
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• 2023

The goal of this study was to identify new bioactive peptides in extracts derived from Tenebrio molitor (T. molitor) larvae for the development of functional foods. After extraction from freeze-dried T. molitor larvae with various solvents on time course, the extracts showed the highest 2,2,1-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity at 5 and 10 hr per total protein and solid contents, respectively. When the water extract was fractionated, a high methanol concentration led to a reduced level of high-molecular-weight proteins in the centrifugal supernatant, whereas increased DPPH activity in the supernatants suggests low-molecular-weight peptides may mediate antioxidant activity in the supernatant. Most of the organic solvent partitions, excluding butanol, showed similar activities in the water phases, and the organic solvent partition fraction exhibited a 28~44% decrease in activity following heat treatment, implying that some components in the fraction become unstable in the presence of heat. The addition of proteinase K to the water extract increased DPPH activity by 10~20%, suggesting that peptides, when released from total proteins, partially increase antioxidant activity. Therefore, we suggest that the antioxidants in T. molitor larval extracts make them a potential source of functional animal food.

• Environmental Engineering Research
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• v.23 no.1
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• pp.62-69
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• 2018

In the present study, long-term heavy metals (HMs) contaminated soil samples from a well-known Pb/Zn smelting area in the southwest of China were collected, and physicochemical and biological characteristics of these samples were evaluated. Soil samples contained different concentrations of HMs, namely Pb, Zn, Cu, and Cd. Enzyme activity analyses combined with microcalorimetric analysis were used for soil microbial activity evaluation. Results showed that two soil samples, containing almost the highest concentrations of HMs, also shared the greatest microbial activities. Based on correlation coefficient analysis, high microbial activity in heavily HMs contaminated soil might be due to the high contents of soil organic matter and available phosphorus in these samples. High-throughput sequencing technique was used for microbial community structure analysis. High abundance of genera Sphingomonas and Thiobacillus were also observed in these two heavily contaminated soils, suggesting that bacteria belonging to these two genera might be further isolated from these contaminated soils and applied for future studies of HMs remediation. Results of present study would contribute to the evaluation of microbial communities and isolation of microbial resources to remediate HMs pollution.

• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.136-138
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• 2007

본 연구에서는 유기박막트랜지스터 (OTFT, Organic Thin film Transistor) 제작을 위한 채널막으로 pentacene의 soluble 공정 과 soluble 공정 올 통하여 제작된 pentacene 박막의 특성 을 분석 하여 유기박막트랜지스터에 적용 여부를 조사하였다. Pentacene을 용해시키기 위한 용제로는 toluene과 chloroform을 사용하였으며, 각각의 용제에 대하여 열처리를 하여 pentacene 용액을 준비하였다. Spin-coating 법으로 pentacene 유기 박막을 제작하여 각 박막의 결정화 특성을 관찰하였다. XRD 회절 분석 결과 chloroform 올 이용한 pentacene 박막에서만 결정화가 된 것이 확인이 되었다. Hall effect measurement 분석 결과 chloroform올 이 용한, pentacene 박막의 전하농도 (Carrier Concentration)는 $-3.225{\times}1014(c{\cdot}cm^{-3})$를 나타내었고, 이동도 (Mobility)는 $3.5{\times}10^{-l}(cm^2{\cdot}V^{-1}{\cdot}S^{-1})$를 각각 나타내었다.

• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.299-302
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• 2007

본 연구는 하 ${\cdot}$ 폐수 중의 유기물뿐만 아니라 질소, 인을 생물학적으로 제거하는 실험을 수행하였다. 공정 내 미생물의 유실을 방지하고 미생물이 고농도 상태로 유지 가능한 부착성장의 한 공법인 RBC에 끈상 나선형 미생물 접촉재를 설치한 반웅기를 이용하였다. 원수는 Glucose 1,800 mg/L, $NH_{4}Cl$ 500 mg/L, $KH_{2}PO_{4}$ 5mg/L를 혼합한 인공폐수를 제조하여 공정에 주입하였고, 그 결과 각각 미생물이 폐수에 적응하는 단계인 Period 1에서는 각 수질 분석 항목의 농도가 점차적으로 감소하는 경향을 보였으며, 정상상태라고 판단한 Period 2에서는 최종적으로 유입수에 대한 유출수의 제거율은 각각 $TCOD_{Cr}$ 94%, BOD 87%, T-N 85%, T-P 89%의 결과를 나타내었다.

• New & Renewable Energy
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• v.20 no.3
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• pp.12-19
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• 2024

This study uses exergy analysis to evaluate the fuel-saving potential of a waste heat recovery unit (WHRU) integrated with an Organic Rankine Cycle (ORC) system for marine applications. Data from the training ship HANBADA of the Korea Maritime University and the general cargo ship BBC CAMPANA, including their operational routes and main engine loads, were used in this study. Simulations indicated that the WHRU system could save approximately 27.5 metric tons of fuel per voyage, equivalent to approximately 2.1% of the total fuel consumption. The WHRU system demonstrated a higher efficiency during long-distance voyages, significantly enhancing fuel savings. In addition, higher engine loads increased the exhaust gas thermal energy, thereby substantially improving the WHRU output. This study emphasizes the importance of evaluating the applicability of the ORC system for marine vessels by closely examining their operational patterns, navigation duration, and main engine load variability.

• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.294-296
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• 2007

본 논문은 고온 고압 수증기를 활용한 유기성 폐기물의 가수분해현상과 이를 이용한 퇴비 등의 재활용 방안을 제시한다. 사료화의 경우는 3.27 기압 $135^{circ}C$ 전후의 포화수증기로 교반처리하여 영양소 파괴를 줄이고 멸균 및 가수분해가 일어나게 하여 소화가 잘되는 사료를 만들 수 있고, 퇴비화의 경우는 16기압. $200^{circ}C$ 전후의 포화수증기로 교반처리하여 가수분해, 산가수분해, 열분해 및 탄화가 일어나도록 하여 목초액과 활성탄을 함유한 보온성, 보비성 및 통기성이 양호한 퇴비를 만든다. 응축수는 액비로 사용가능하므로 완전 재활용이 가능하다.

• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.297-298
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• 2007

본 논문은 가열된 폐식용유를 이용하여 음식물류폐기물에 포함된 수분을 증발시키고 고형성분을 익혀 사료, 퇴비 및 연료화 할 수 있는 장치를 소개한다. $200^{\circ}C$의 폐식용유에서 l분 이내에 완전 건조 처리되며 멸균을 시킬 수 있어 효과적이다. 열원은 소각로 열을 재활용할 경우 경제적이다. 탈리액의 해양투기가 금지될 경우 탈리액을 획기적으로 줄이는 대안이라 여겨진다.

• Proceedings of the KAIS Fall Conference
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• 2007.11a
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• pp.400-402
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• 2007

본 논문은 쓰레기 소각로에서 발생하는 폐열을 활용하여 유기성 폐기물의 재활용하는 방안을 제시한다. 파쇄된 유기성 폐기물을 증류 건조시켜 건조된 고형물과 응축수로 분리하여 응축수는 액비나 탈취제로 활용하고 고형물은 단미사료로 활용하는 완벽한 재활용시스템이다. 탈리액의 해양투기가 금지될 경우 탈리액을 획기적으로 줄이는 대안이라 여겨진다.

• Journal of Digital Convergence
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• v.11 no.10
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• pp.59-69
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• 2013

20s country employment rate to 57% in the last four years, is staying low. College graduates in the 25-29 year old crowd real unemployment rate is over 20% youth unemployment, the analysis problem is serious enough. Accordingly, activation of Cooperation, which addresses the issues of these countries now being recognized as the primary means, and in the future, government policy and national indicators to be given more attention and support seems clear. Government from 2012 'Cooperation Development Project leading universities' (LINC: Leaders in INdustry-university Cooperation) by promoting companies that require manpower, actual research and development and technology transfer to enable the University - Industry - between research institutions based on organic correlated with local universities and industrial growth model for the creation of a variety of leading industry cooperation. has to diffuse. This background, the aim of this study at the University of excavation site close-type talent. Fostering curriculum development are essential to the field on the form will close. In this study, major department (Department) conducted by major research based on the results of the curriculum needs to spread the field for Cooperation closely analyze the curriculum and Annual type, domain-specific promotion measures proposed.