• 생물환경조절학회지
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• 제10권4호
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• pp.237-243
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• 2001

무가온 촉성재배시 멀칭재료가 참외 생육과 품질에 미치는 영향을 구명하기 위하여 토양 멀칭재료로 하우스외피복 재활용필름, 배색 P.E. 필름, 녹색 P.E. 필름과 대조구로 투명 P.E. 필름을 설치하여 지온의 변화와 생육, 과실품질 등을 조사하였다. 토양 5cm 깊이의 일.월중 지온은 하우스외피복 재활용필름에서 높았으나 광 투과율이 낮은 녹색 P.E필름에서 낮았다. 토양 심도별 야간지온은 녹색 P.E. 필름은 토양 깊이 20cm에서 나머지 필름은 토양 깊이 5cm에서 가장 높았으며, 멀칭 재료별 지온차는 깊이 내려갈수록 점차 감소되었다. 정식 후 30일의 초장과 절수는 지온이 높은 하우스외피복 재활용필름이 유의하게 높았으며, LAI, CGR, RGR도 높은 경향을 보였다. 정식 후 30일의 잡초 발생량은 큰 차이가 없었으나 정식 후 90일에는 투명 P.E.필름에서 많았다. 과실 수확은 하우스외피복 재활용필름에서 빨라 투명 P.E.필름보다 2일 단축되었으나, 과중, 과장, 당도 등 과실특성은 큰 차가 없었다. 하우스외피복 재활용필름에서 상품수량은 2,426kg.10a$^{-1}$로 투명 P.E. 필름보다 6% 증수되었다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1999년도 제3회 압연심포지엄 논문집 압연기술의 미래개척 (Exploitation of Future Rolling Technologies)
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• pp.3-9
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• 1999

The recent technical trend in hot rolling of steel can be described as process and product technologies which have been progressed with modern mill equipment and computers. Precise gauge and width control can be achieved by up-to-date control methods such as AGC and AWC systems. Roll benders and various shape control systems enabled high quality flatness and crown control. Mills can produce higher tensile materials by new process based on process metallurgy. The use of high speed steel rolls and on line roll grinders make the schedule free rolling easier which results in cost saving. Process itself goes toward continuous and simple flow type which has lower operation. Endless rolling and strip casting are examples of the trend. Materials with higher tensile strength and various functions have been developed in last years to meet the customer's needs and this trend will continue.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
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• pp.652-655
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• 2004

In these days, repair materials for leakage cannot help but being taken in temporary way without any noticeable countermeasure. This kind of repair is socially criticized many times that is defective construction even if tills costs a lot. It was not arrange the standard for performance evaluation test method and quality maintenance for materials, even it has been used various injection repairing agent. In conclusion, We suggest that the test method for repair materials for leakage to establish the leakage repairing technology as increase of structure demand, so that the necessity of the establishment of the quality control standard and the performance testing way on the relevant water-proof seal is increasing a lot to regulate the water-proof technology and the leakage repair technology.

• 한국방사선학회논문지
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• 제2권4호
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• pp.11-25
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• 2008

유방암이 여성암 발생 1위를 차지함에 따라 선별검사로서 유방촬영율 또한 증가하였다. 유방촬영술은 병변의 유선 조직이나 지방조직 등 주위 조직의 X선 흡수차가 작고 미세 석회화를 묘출해야 되는 어려운 점이 있어 정확한 진단을 위해서는 양질의 영상이 요구되며 이를 위해서는 촬영장비의 성능관리와 화질관리가 필요하다. 이에 본 조사에서는 정도관리가 실제적으로 잘 이루어지고 있는지 알기위하여 광주광역시 소재의 의료기관중 유방암검진기관으로 등록되어 있는 기관 37곳을 대상으로 하여 2008년 7월 1일부터 8월 31일까지 62일 동안 유방촬영장비의 정도관리 실태에 관하여 설문조사하였다. 유방촬영장비의 장치적 특성에 대한 조사결과 사용하는 장비에 대하여 모르고 사용하는 경우가 많았다. 필름과 CR을 이용하는 병원은 각각 19곳(49%)이었고 DR을 이용하는 병원도 1곳 있었다. 또 종합병원의 대부분은 CR을 이용하고 있었으며 의원은 필름을 사용하는 경우가 많았다. 정도관리 방법에 대한 질문 결과 38%만이 매뉴얼대로 점검하고 있었다. 또 조사한 병원 전수가 전문 업체에 정도관리를 맡기고 있었다. 그 이유로는 전담인력, 시간, 거리 등 한계점 때문에 맡긴다는 대답이 65%로 가장 많았으며 기자재가 없어서 맡긴다는 대답이 44%로 그 다음으로 많았다. 이러한 결과는 정도관리가 형식적으로 이루어지고 있음을 반영하며 전문 업체에 의존하므로 점검 항목자체에 수동적이고 무관심한 것으로 사료된다. 따라서 정기적인 교육을 실시하여 정도관리에 관한 인식을 높이고 방사선사의 적극적인 참여를 통하여 올바른 정도관리를 할 수 있도록 하여야 한다. 이러한 노력과 더불어 전담인력이나 기자재 등 문제점을 해결함으로써 정도관리의 발전에 기여할 수 있을 것이다.

• 한국전기전자재료학회논문지
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• 제32권6호
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• pp.522-527
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• 2019

In order to fabricate high-quality SiC substrates for power electronic devices, various single crystal growing methods were prepared. These include the physical vapor transport (PVT) and top seeded solution growth (TSSG) methods. All the suggested SiC growth methods generally use induction-heating furnaces. The temperature distribution in this system can be easily adjusted by changing the hot-zone design. Moreover, precise temperature control in the induction-heating furnace is favorably required to grow a high-quality crystal. Therefore, in this study, we analyzed the heat transfer in these furnaces to grow SiC crystals. As the growth temperature of SiC crystals is very high, we evaluated the effect of radiation heat transfer on the temperature distribution in induction-heating furnaces. Based on our simulation results, a heat transfer strategy that controls the radiation heat transfer was suggested to obtain the optimal temperature distribution in the PVT and TSSG methods.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2007년도 제32회 학술대회 초록집
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• pp.39-39
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• 2007

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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• pp.367-372
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• 2002

The waterproofing systems of concrete bridge deck are installed under the complex circumstances, such as traffic loading, weather, and the condition of the deck concrete. For assuring the effectiveness of waterproofing system, the materials and the construction method and timing ought to be suitably selected with the procedures of waterproofing and the system has to ensure the economical performances. First of all, we discussed whether the quality and performance criteria for highway bridge deck are resonable or not through the investigation of domestic and foreign criteria. The basic properties of waterproofing membranes on market and the performance of waterproofing systems of concrete bridge deck have also been investigated in the view of the damages frequently reported from job site. In this way, the causes and measures of damages, the guidelines of design, construction, quality control, and maintenance, the test methods and criteria of membranes and waterproofing system, are proposed.

• 펄프종이기술
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• 제32권5호
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• pp.60-66
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• 2000

Coating immobilization is the process by which the wet coating applied to paper or paperboard reaches the final form. A coating immobilization point is defined as the solids content reached during drying where no further redistribution of coating materials occurs. Good control of coating immobilization is important in producing coated paper and paperboard with consistent high quality. This paper discusses the technical concepts of how coatings immobilize, and describes the importance of good immobilization control on coating holdout and coating structure. The use of soy protein polymers to modify the coating immobilization point is discussed. Soy proteins, because of their interaction with coating pigments, make a significant contribution to the immobilization characteristics of coastings. This technology gives the formulator options for changing the immobilization point to improve the performance of the coating. The importance of immobilization on casting uniformity, microporosity and sheet qualities is discussed, including binder migration, mottle, gluing, and print quality.

• 한국축산식품학회지
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• 제33권6호
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• pp.730-736
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• 2013

This study was to establish irradiation process for serving ginseng chicken porridge to immune-compromised patients. Raw chicken, glutinous rice, ginseng, garlic, dried jujube and carrot were used as raw materials for ginseng chicken porridge. The initial level of microorganisms contaminated in raw materials and their predominant species were determined. The level of microorganism detected in raw chicken and in ginseng were 3.4 Log CFU/g and 4.7 Log CFU/g, respectively. Major predominant microorganisms were Pseudomonas fragi in chicken, Enterobactor faecalis in carrot, and Bacillus subtilis in other materials. Chicken and carrot were excluded from irradiation treatment because ordinary thermal treatment can inactivate the microorganisms contaminated in those materials. Five kGy of gamma ray was the effective sterilizing dose required to inactivate B. subtilis in glutinous rice, garlic and jujube, and 10 kGy in ginseng. Ginseng chicken porridge was prepared with each of raw materials gamma-irradiated with the selected sterilizing doses. Control was ginseng chicken porridge prepared with non-irradiated materials. The growth of microorganisms was not observed in the chicken porridge prepared with irradiated raw materials. Sensory results showed that the score of flavor and off-flavor was slightly lower in ginseng chicken porridge prepared with irradiated raw materials than in control. This was considered to be due to the increase of TBARS values by gamma irradiation. However, there was no significant difference on overall acceptance between the porridge prepared with irradiated raw materials and control. The results showed that the individual gamma irradiation of raw materials can be applied to prepare ginseng chicken porridge as meals for the immunocompromised patients.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 가을학술발표대회논문집
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• pp.127-128
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• 2023

Recently, OSC (off-site construction) construction has been revitalized as a response to the decline in building quality and productivity due to lack of skilled manpower at construction sites, and PC (precast concrete) construction, a representative OSC construction, is insufficiently applied to public housing.This is the situation.In addition, in the case of general contents appearing in standard specifications, the construction standards for quality assurance remain in the 1990s and do not correspond to the current construction environment.In order to improve the quality of PC member joints, we compared and analyzed Korean and Japanese specifications to establish appropriate standards for PC construction quality control, focusing on the quality of grout used in joints.