• 한국식품저장유통학회지
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• 제24권6호
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• pp.849-856
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• 2017

본 연구는 까마중 열매의 수확시기에 따른 성분변화, 항산화효과 및 항염증 효과를 분석하여 최적 수확시기를 구명하였다. 까마중 열매의 유리당은 4가지가 검출되었으며, 유리당 중 fructose는 대체적으로 수확시기가 늦어짐에 따라 증가하였다. 까마중 열매의 주요 유기산은 malic acid와 acetic acid로 나타났으며, 총 유기산 함량은 10월 18일과 10월 25일에 수확한 까마중 열매들에서 높게 나타났다. 총 폴리페놀 함량은 10월 18일에 수확한 까마중 열매, 10월 11일에 수확한 까마중 열매 및 10월 25일에 수확한 까마중열매 순으로 높게 나타났다. 수확시기별 까마중 ethanol 추출물들의 항산화효과와 항염증효과 검정을 위하여 DPPH radical scavenging assay와 ABTS radical scavenging assay를 수행하였으며, 항염증 효과 측정을 위하여 lipopolysaccharide(LPS)로 염증을 유발시킨 RAW 264.7 cells을 NO 저해실험에 사용하였다. 항산화 효과와 항염증 효과는 10월 18일에 수확한 까마중 열매 ethanol 추출물에서 가장 높은 활성을 나타내었다. 10월 18일에 수확한 까마중 열매는 총 폴리페놀 함량, 항산화 효과 및 항염증 효과가 우수하였다. 까마중 열매의 수확시기에 따른 성분분석 및 생리활성 실험 결과, 까마중 열매의 최적 수확시기는 성숙 중기인 10월 18일과 10월 11일로 밝혀졌다.

• 농촌계획
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• 제25권2호
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• pp.63-74
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• 2019

As the awareness of food security has increased, the Korean government has established national projects, such as Saemangeum proclaimed land, to secure sources of grain. Saemangeum is a large-scale agricultural area that was constructed to maintain preparedness for unstable food markets. This study aims to develop a $6^{th}$ Industrialization Model (SIM) for Saemangeum Grain Complex by applying feasible strategies to wheat and two-rowed barley which have low self-sufficiency rates. In addition, this study estimates the potential economic value of each development strategy associated with a sixth industrialization model to create higher added values from production, processing and tourism experiences. The strategic plan for primary, secondary, and tertiary industries is to combine cultivating and processing wheat and two-rowed barley for sales and linking them to tourism experience. This study shows value added from the combination of the primary, secondary and tertiary industry of wheat and two-rowed barley are 7.5 and 23.0 times more than those of the primary and tertiary industry combination, respectively. Through branding Saemangeum Grain Complex's products, such as Saemanguem bread and craft beer, would further enhance the economic benefits derived from the complex.

• 한국산업융합학회 논문집
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• 제19권4호
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• pp.198-205
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• 2016

For the study on the ion exchange of nickel hexacyanoferrate(NiHCNFe) electrode with the several cations, the film of hexacyanoferrate was prepared on the bare nickel surface by the electrochemical and chemical methods in the solution composed with 5mM K3Fe(CN)6 and 100mM KNO3. To compare the capability of the ion exchange of NiHCNFe film electrode, the repeated cyclic voltammograms were measured in the 0.5M cation nitrate solutions at $25^{\circ}C$ and pH7. It was found that the capacity of the electrochemically derivatized NiHCNFe reduced in the rate of 0.5~0.7%/cycle and was nearly exhausted at the 150th potential cycle. Better result was obtained from that the capacity loss of the chemically assembled NiHCNFe was less than 0.02%/cycle for 5,000cycles. Furthermore, the residual capacity was more than 30% at the 5,000th cycle.

• 디지털융복합연구
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• 제15권3호
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• pp.65-75
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• 2017

현재의 농업은 농촌인구 고령화 및 도시로의 인구유출로 인하여 심각한 노동력 부족을 경험하고 있으며, 다양한 경제적 문제를 안고 있다. 4G 통신의 보급으로 시작된 최근 발전 정보통신기술의 확산과 더불어 사물인터넷 기술이 새롭게 대두되며, 다양한 산업과 융합하여 혁신적인 가치를 창출하고 있다. 사물인터넷 기술과 농업의 융합으로 확장된 6차 산업으로 농업은 노동집약산업에서 IT기반의 고부가가치 융합산업으로 발전할 수 있게 되었다. 첨단 농업인 6차 산업의 핵심 구성요소인 스마트팜은 농장제어와 관련한 센서와 장치를 하나의 플랫폼으로 구성되어있으며, 최근 스마트팜은 단순한 농장제어가 아닌, 작물의 생육환경을 분석하고 환경에 맞는 생육환경데이터를 제공하는 방법으로 발전하였다. 본 연구에서는 전통적인 방법의 농업 문제점을 해결하고 생산성 향상 및 수익성 개선을 통한 농촌경제 활성화 방안으로서의 스마트 농업을 제안하고자 한다. 또한 최근의 첨단 정보통신기술이 어떻게 기업에 영향을 미칠 수 있는가에 대하여 스마트 농장을 구축하여 성공적으로 운영하는 사례 농가 인터뷰를 통하여 스마트 농업의 가능성을 살펴보고자 한다.

• 한국콘텐츠학회논문지
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• 제19권11호
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• pp.451-461
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• 2019

대전광역시는 4차산업혁명에서의 디자인산업 성장 기회요인이 풍부한 도시로 '4차 산업혁명 특별시'의 완성을 목표로 하고 있다. 디자인은 융합의 중점에 위치하며, 디자인의 개념은 산업 구조와 밀접하게 연관되어있어 4차 산업혁명에서 중요성이 부각된다. 그동안 대전은 지역디자인센터(RDC)의 부재로 디자인산업의 발전에 한계가 있었으나, 2018년 6월부터 대전 디자인센터의 건립을 위한 공사를 시작하였고 2019년 연말 완공을 목표로 두고 있다. 본 연구에서는 국내 디자인센터(KIDP 및 각 RDC)의 2018년도 디자인 전문인력 재교육과정과 대전의 산업구조와 디자인산업 현황, 재교육 현황을 비교·분석하여 향후 대전 지역디자인센터(RDC)설립에 따른 디자인 전문인력 재교육 방안을 도출하여 제시하였다.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
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• pp.49-52
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• 2002

From virtually no steel production after the Koran war, steel industry in Korea had a phenomenal growth to reach crude steel production of 40 million tons level in 1997 and became the 6th largest steel producer in the world. The growth owes to steel technologies developed elsewhere over centuries and decisive management decisions to adopt new technologies as quickly as possible. Steel technologies are reviewed and brief overviews of welding research in Korea are presented.

• 치과방사선
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• 제29권1호
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• pp.119-147
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• 1999

The purpose of this study was to investigate the effects of the Co-60 γ irradiation on the osseointegration. 2.0 mm titanium alloy screw implants(Sankin Industry Co. Ltd., Japan) were placed in the tibial metaphysis of the rabbits, bilaterally. The mean length of the implants was 6.0 mm. The right tibia was irradiated with a single dose of 15Gy from 60Co teletherapic machine at 5th postoperative day. The experimental group was irradiated tibia. The control group was non­irradiated tibia. To observe the phase of bone formation, the bone labeling by intramuscular injection of 20mg/Kg of Tetracycline, Calcein, Alizarin red S, was performed. The rabbits were sacrificed on the 1st, 2nd, 4th, 6th, 8th week and the tibia including implants were taken, and then the specimens were examined by the microradiography, light microscopy, and fluorescent microscopy. The obtained results were as follows: 1. There were connective tissue between bone and titanium at 1st week, in both group. Especially, the many empty lacunae without nucleus and obscure cytoplasm in experimental group, were observed. 2. The osteons were observed at 4th week in control group, and at 6th week in experimental group. The bone formation in experimental group was retarded as compared to the control group. 3. In fluorescent microscopy, bone labelling band was observed as linear, arc or concentric shape. Occasionary interrupted labelling band was observed, which is demonstrated bone remodeling. 4. In microradiographic examination, the radiolucent image was found between bone and implant with widening of bone marrow spaces as compared to the control group.

• 기술사
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• 제37권5호
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• pp.42-46
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• 2004

Automobile industry with history of more than 100 years is totally influencing all the economic environments and has very important wellbeing role in the World in every country of the world. Korean Automotive industry in production has only about 40 years but ranked remarkably 6th biggist in the world in the year of 2003. Nowadays The auto, industry has changed into buyer's market in competitively global battle fields and also is changing industry paradigm in product, sales, production, colarboration & emerging, etc. BRICs(Especially China)are rapidly emerging as main producers and customers in new big markets. Korea Auto. Industry faces crictical problems such as higher salary, furious labor union's striking lack of raw material, evasion of 3D works with studying engineering by students which are the key pending agenda that should be overcome for prosperous growth and development of achieving US20,000 GNP.

• The International Journal of Costume Culture
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• 제7권1호
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• pp.40-47
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• 2004

The purpose of this research was to examine the degradation rate of alizarin in accelerated degradation conditions using the GC-MS quantitative analysis. Alizarin dye solution (2.5 x 10/sup -3/ M conc.) were kept in 150℃ oven for total of 7 days and the degradation rate was examined each day. 2.5 × 10/sup -4/M conc. alizarin dye solution was mixed with H₂O₂ according to [H₂O₂]/[dye] ratio 40 and were kept under 365㎚ UV for 2 hours, analyzed after 0, 30, 60, 90, 120min using the GC-MS. Gas chromatogram showed alizarin peak at 9.96 - 10.13 min. retention time range and residual peaks in the wide range from 9.6 to 11.1 min. Oven degradation exhibited an initial decrease in the amount of alizarin, which was followed by increasing amount in 4/sup th/ day. The decrease in the alizarin was significantly shown by the 7/sup th/ day. Same pattern was also observed in the H₂O₂/UV/O₂ degradation samples and was verified ed by the UV-VIS spectra. The differences in the amount of alizarin between 1/sup st/ day and 4/sup th/ day samples, 4/sup th/ day and 7/sup th/ day samples, and Control and 7/sup th/ day samples of the oven degradation were significant at alpha .20.

• 전력전자학회논문지
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• 제16권6호
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• pp.569-576
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• 2011

본 논문에서는 PWM 인버터에 적합한 새로운 데드타임 보상방법을 제안한다. 최근 PWM 인버터는 교류전동기, 분산전원용 계통연계 시스템, 정지형보상기 등의 다양한 산업에 사용되고 있다. 그러나 사용되는 전력용 소자의 비선형적인 특성과 데드타임에 의해 전력의 품질이 저하되고 전류에 고조파가 발생하게 된다. 데드타임에 의한 고조파는 정지좌표계상에서는 제 5, 7 고조파가, 동기좌표계상에서는 제 6 고조파가 가장 현저하다. 본 논문에서는 동기좌표계상에서 공진제어기를 사용하여 제 6 고조파를 보상하는 방법을 제안한다. 제안된 방법은 시스템의 안정도를 유지하면서도 데드타임에 의한 전류의 고조파를 억제하여 전력품질을 향상시킬 수 있고, 제 6 고조파를 검출하기 위한 별도의 연산이나 외부적인 하드웨어, 추가적인 실험이 필요하지 않다는 장점이 있다.