• Food Science and Industry
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• v.49 no.2
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• pp.63-70
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• 2016

대부분의 산채는 한 계절에만 생산되므로 연중 공급될 수 있는 건조 상태로 유통된다. 건조 산채에 필요한 제품화 기술로는 재수화시간 단축기술, 간편 즉석 산채와 즉석 조리 산채의 제품화 기술 등이다. 식품소재로의 응용분야 확대를 위해서는 산채를 미분화하여 일반식품소재화 하는 방법이 적합하다. 그러나 전분함량이 낮은 산채류는 분쇄력이 가해지기 어려워 공업 규모에서의 미분말 제조가 곤란하고 비용적인 문제로 용도가 제한된다. 따라서 산채의 식품소재화 공정에서 중요한 핵심기술은 분쇄이므로 저비용에서의 미분말 제조기술 개발이 필요하다.

• Journal of Korea Ship Safrty Technology Authority
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• v.16
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• pp.8-13
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• 2004

본선은 국내 최초로 선박검사기술협회의 제조검사를 마친 11톤급 상동형 세일링 요트로 호주 Jeff Schionning Design 사에서 선박임대와 분양사업의 목적으로 설계하고 (주)신화마린테크에서 13개월에 걸쳐 Mouldless 공법을 통해 건조한 본격적인 레저선박이다.

• Journal of the Korea Organic Resources Recycling Association
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• v.25 no.1
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• pp.47-55
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• 2017

The technology for hydrothermal reaction of organic waste is one of the promising process to improve energy efficiency of biomass waste recycling system since moisture contents of treated biomass could be reduced at 40% or less than by dehydration processes. For these reasons, many parts of the world are interested in hydrothermal reaction of organic waste. In this paper, drying performances were evaluated with and without hydrothermal reaction of organic wastes which are sewage sludge and food wastes. For the hydrothermal reaction, organic wastes were treated at $200^{\circ}C$ for 1hr. Drying time of treated organic waste by hydrothermal reaction was reduced. In case of food waste drying at $100^{\circ}C$, drying time of treated wasted was reduced more 52.9% than non-treated. Hence, drying performances of sewage sludge and food wastes should be improved by hydrothermal reaction. Drying rates of treated wastes were considerably increased at preheat period of drying characteristic curve as followings; at $80^{\circ}C$ sludge as 148%, $100^{\circ}C$ sewage sludge as 151%, $80^{\circ}C$ food waste as 209%, $100^{\circ}C$ food waste as 366%. It means the surface area of treated wastes could be increased with destruction of cell membrane by hydrothermal reaction. However, the designer and operator of drying process should be careful, since enhanced drying rate cause the extension the decreasing drying period.

• Environmental engineer
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• v.19 s.204
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• pp.84-86
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• 2003

• Environmental engineer
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• s.88
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• pp.58-59
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• 1993

• Proceedings of the Korean Society Of Semiconductor Equipment Technology
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• 2004.05a
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• pp.118-122
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• 2004

본 연구에서는 반도체 세정 챔버 내부에서 회전 척을 사용하는 기판의 세정 공정에서 세정장치와 건조장치를 분리하지 알고 일체화하는 기술을 연구하는 한편, 초음파 세정기술을 이용하여, 세정에 사용되는 약액을 절감하는 방법도 연구하였다. UWA(Ultrasonic Water and Clean Air) system은 초음파 진동부, 초순수 공급부 그리고 clean air공급부를 모듈화 하였다. UWA system으로 공급된 초순수에 70～130kHz범위의 초음파가 더하여지고 반도체 기판 위에 분사되면 기판 위의 미세 파티클을 세정하는 효과를 갖는다. 세정 후 연속적으로 clean air를 분사하여 기판 위의 수분을 완전히 제거한다. Particle 세정 작업을 실시한 후 표면을 검사하여 정밀세정 능력을 확인하였다.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.882-884
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• 2010

본 연구는 피부미용전문가에 의한 관리 후, 홈케어 유무에 따른 건조피부의 개선 효과를 알아보고자 하였다. 건조피부로 평가된 10명을 대상으로, 한족 팔에는 마사지와 홈케어를 적용하고, 다른 쪽 팔에는 단지 마사지만을 적용하였다. 마사지는 호호바오일에 라벤더정유를 혼합하여, 10분간의 마사지를 주 2회로 총 4주 동안 실시하였고, 홈케어로는 마사지에서 사용한 시료를 집에서 매일 바르도록 하였다. 실험 결과 마사지와 홈케어를 적용한 그룹이 마사지만을 한 그룹보다 유분과 수분의 함유량이 증가하였다. 특히, 마사지와 홈케어를 한 그룹에서 마사지의 횟수가 증가 될수록 피부에서의 유 수분은 증가하는 것을 알 수 있었다. 따라서 전문가에 의한 관리효과를 유지하고, 더 효과적으로 건조증상를 개선시키기 위해서는 무엇보다도 홈케어의 중요성이 강조되어야 한다.

• Journal of the Korean Wood Science and Technology
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• v.32 no.1
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• pp.45-51
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• 2004

Combined microwave-convective drying of 2.4mm-thick radiata pine veneer grown in New Zealand was conducted to investigate drying characteristics. The veneers could be dried from 160% to 0% moisture content in 7.5 min by microwave drying combined with hot-air of 100℃. This drying rate is about three times higher than that of conventional convective drying with only hot air of 100℃. However there remained charred spots when too high microwave power was applied. Therefore investigations of the microwave-drying characteristics of veneer of various sizes and species are needed to determine the optimal drying conditions.

• Journal of the Korean Recycled Construction Resources Institute
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• v.6 no.4
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• pp.331-335
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• 2018

The purpose of this study is to investigate the feasibility of CFBC artificial fine aggregate as a substitute for natural aggregate used in dry mortar. The basic performance of the flow, compressive strength and dry shrinkage of the dry mortar was evaluated. Four types of test dry mortar specimens using natural aggregate without expansion admixture, a specimen with modified CaO expansion admixture and natural aggregate, a specimen with modified CaO expansion admixture and CFBC artificial fine aggregate, and a specimen using CFBC artificial fine aggregate without modified CaO expansion admixture were evaluated respectively. As a result of evaluation of drying shrinkage performance at 20th day of age, the dry shrinkage performance of the specimen using modified CaO expansion admixture was found to be the highest at $250{\times}10^{-6}$. On the other hand, the specimen containing the modified CaO expansion admixture with CFBC artificial aggregate exhibited a shrinkage of $410{\times}10^{-6}$, and the drying shrinkage of specimen using natural fine aggregate without expansion admixture was $450{\times}10^{-6}$. When the modified CaO expansion material was used, and exhibited performance equal to or higher than that of the shrinkage-drying property.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.3
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• pp.497-502
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• 2020

For the Navy to acquire the desired vessels in time, it is necessary to plan the schedule accurately for warships. On the other hand, until now, there has been only a subjective prediction of the period of warship construction through a survey by a group of experts. No academic studies have been conducted based on actual data. Therefore, this study presents a model for predicting the construction period of a warship through linear regression based on actual data. Experts first identified the factors that can affect the warship construction period. Actual data of the factors were collected, and regression analysis was performed to estimate the ship construction period. As a result, the key factors selected that influence the construction period of a ship were the number of operational test items, number and type of equipment, and the number and type of R&D equipment. The resulting regression model revealed 96.5% accuracy in terms of internal validity.