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- 저자 : 이동수(Lee, Tong-Soo) (검색결과 1,095 건)
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참외 수경재배에서 줄기 유인 방법에 따른 수확량 및 작업 강도 비교
이동수,권진경,윤성욱,이시영,서민태,이희주,이상규,강태경,Lee, Dong Soo,Kwon, Jin Kyung,Yun, Sung Wook,Lee, Si Young,Seo, Min Tae,Lee, Hee Ju,Lee, Sang Gyu,Kang, Tae Gyoung 한국생물환경조절학회 2021 생물환경조절학회지 Vol.30 No.4
참외는 줄기를 땅 위에서 포복재배로 유인하는 것이 일반적으로써 노동강도가 강해서 농업인 근골격계 질환의 원인이 되므로 작업강도를 낮추고 품질도 향상시키기 위한 새로운 재배 방법을 찾고자 본 실험을 수행하였다. 그 결과, 줄기를 상향으로 유인하는 처리구가 생육 및 광합성 특성이 좋았고, 근활력은 하향 줄기 유인 처리구에서 좋은 것으로 나타났다. 상품 수량에 있어서는 상향 처리구가 4.055kg/10a, 하향 처리구가 3,983kg/10a으로 통계적인 유의성은 없었다. 줄기유인 작업에 대한 작업자세 평가의 경우, 기존 포복재배가 상향, 하향 재배방식 보다 위험수준이 높은 것으로 평가되었다. 결론적으로, 참외 수경 수직재배는 작물 생육, 수확량 및 작업 노동강도 등을 고려해 볼 때 기존 포복재배 방식을 대체할 수 있는 새로운 재배방법이라고 판단되고, 참외 줄기 유인 방법별로 수량 등에 유의성이 없으므로 상향 줄기유인 방법이나 하향 줄기 유인방법 중에서 하우스의 구조나 재배자의 의향에 따라서 선택하여 수직재배를 하면 될 것으로 사료된다. Oriental melon (Cucumis melo L.) is generally cultivated on the ground by creeping culture. A farmer has a higher workload for training stems. This study was conducted to find out a new cultivation of oriental melon to reduce a workload and improve the quality of fruit. There were three treatments for training stem of oriental melon; upward stem growing, downward stem growing, control (creeping stem growing). The results of the plant growth and the net photosynthesis showed higher in upward stem growing. The root activity was higher in downward stem attract. The yield was not significant as 4,055kg/10a in upward stem attract and 3,983kg/10a in downward stem attract. According to the results of the ergonomic agricultural workload evaluation, in the case of the working posture, the working posture of creeping cultivation methods (squatting, bending) showed a higher risk level than the upward and downward cultivation methods. Therefore, it is recommended the upward stem attract of oriental melon is a new cultivation as well as an alternative method for creeping stem attract in terms of improving the plant growth and yield, and reducing the workload.
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블루베리즙 첨가량을 달리한 블루베리편의 품질 및 항산화특성
이동수,박진희,유승석,Lee, Dong Su,Park, Jin Hee,Yoo, Seung Seok 한국식품조리과학회 2015 한국식품조리과학회지 Vol.31 No.6
In this study, we investigated the quality and antioxidant activity of blueberry-pyun (traditional Korean jelly using blueberry) according to different ratios of blueberry juice (100%, 80%, 60%, 40%, and 20%). Moisture and pH significantly decreased as the content of blueberry juice increased (p<0.05). As the amount of blueberry juice decreased, the lightness (L) decreased. At the same time, the redness (a) and yellowness (b) were significantly higher (p<0.05). DPPH radical scavenging activity and anthocyanin contents increased significantly when the amount of blueberry juice increased (p<0.05). In the texture profile analysis, hardness decreased as the content of blueberry juice increased. There were no significant differences in springiness. 20% blueberry juice showed the highest gumminess and chewiness. During sensory evaluation, 60% blueberry juice showed the highest in the appearance, color, sweetness and overall-acceptability. From these results, we conclude that blueberry-pyun made of 60% blueberry juice is the most desirable.
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이동수,정태성,김신,Lee, Dong-Soo,Jeong, Tae-Sung,Kim, Shin 대한소아치과학회 2002 大韓小兒齒科學會誌 Vol.29 No.3
최근 20년간 다양한 종류의 심미 수복재가 개발되었고, 특히 지난 5년 동안에는 그 수에 있어서 극적인 증가추세를 보였다. 최근 들어, ormocer라는 새로운 종류의 광중합형 수복재료가 소개되었는데, 화학 분야에서는 이미 오래 전부터 알려져 있던 성분으로, 광학렌즈 등의 표면경화제로 이용되어 오다가 최근 치과용 수복재에 도입되었다. 'Ormocer' 란 'Organically Modified Ceramics'의 약자로 'Ormosils' (Organically Modified Silicates)로도 알려져 있다. 그러나, 이 새로운 수복재에 대한 연구는 아직 미흡한 실정이다. 본 연구에서는 서로 다른 계통의 광중합형 수복재들(Z-100, Surefil, Tetric Ceram, Dyract AP)과 ormocer(Admira)를 압축강도와 굴곡강도 측면에서 비교 평가하고, 구강내 환경과 유사한 조건에서 수분흡수가 그 물성에 미치는 영향을 평가할 목적으로 시도되어 다음과 같은 결과를 얻었다. 1. 1일 후에 측정한 Admira의 압축강도는 Surefil보다는 낮았으나, 다른 재료들과는 유의한 차이를 나타내지 않았다(p>0.05). 2. 1일 후에 측정한 Admira의 굴곡강도는 다른 4종의 재료에 비해서 낮았다(p<0.05). 2일부터는 3종의 복합레진에 비해서 낮았다(p<0.05). 3. 실험기간(30일) 중 hybrid composite resin군(Z-100, Tetric Ceram)과 packable resin(Surefil)군 간에는 압축강도와 굴곡강도에서 유의한 차이가 없었다(p>0.05). 4. 실험에 사용된 5종의 수복재 모두 압축강도와 굴곡강도가 2일까지 증가하다가 7일부터 감소하였다(p<0.05). 5. 각 재료의 시간에 따른 압축강도와 굴곡강도의 변화양상은 통계적으로 유사하였다(p>0.05). During the last two decades, many new filling materials and material groups have been developed. the number of available restoratives has increased dramatically, especially during the last 5 years. Ormocers are a new class of materials which are still under development with regard to dental applications. However, in the chemical literature these materials have been known for a long time and used for producing scratch resistant coatings on plastic spectacle lenses. It is a combination of inorganic and organic materials. 'Ormocer' is an abbreviation for 'Organically Modified Ceramics'. These compounds are also known in the literature as 'Ormosils' (organically modified silicates). Their chemistry is comparable to that of silicones and organic polymers. The purpose of this study was to determine of compressive strength and flexural strength of a ormocer (Admira) and to investigate the effects of water absorption in comparison with three composite resins(Z-100, Tetric Ceram, Surefil) and one compomer(Dyract AP). The following results were obtained ; 1. Admira had the lower compressive strength than Surefil, but no statistically difference with other materials at 1 day(p>0.05). 2. Admira had the lower flexural strength than all other materials at 1 day. From 2 days, Admits showed lower flexural strength than three composite resin(p<0.05). 3. There was not statistically significant difference of compressive and flexural strengths between hybrid composite resin group(Z-100, Tetric Ceram) and Packable resin group(Surefil) for experimental period(30 days)(p>0.05). 4. All five materials showed an increase in compressive and flexural strength till 2 days and showed a decrease from 7 days in water(p<0.05). 5. Each materials had the statistically similar behavior of compressive and flexural strengths over time(p>0.05).
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어린이 모야모야병에서 휴식 / 아세타졸아미드 Tc-99m-HMPAO SPECT 를 이용한 수술결과 평가
이동수,현인영,왕규창,조병규,정준기,이명철 ( D. S. Lee,I. Y. Hyun,K. C. Wang,B. K. Cho,J. K. Chung,M. C. Lee ) 대한핵의학회 1998 핵의학 분자영상 Vol.32 No.4
Purpose: This study was performed to evaluate the outcome of encephalo-duro-arterio- synangiosis (EDAS) surgery with rest/acetazolamide Tc-99m HMPAO SPECT in moyamoya disease. Materials and Methods: Rest/acetazolamide subtraction SPECT with consecutive acquisition were done before and 2 months after 21 EDAS surgeries in 18 patients. Perfusion decrease was graded visually for 14 areas of each hemisphere as 0 (normal) to 3 (defectj using 4 point scoring system. Postoperative rest perfusion or perfusion reserve was compared with preoperative ones. Results: Among 294 areas of 21 hemispheres, rest perfusion abnormality was found in 97 areas of 15 hemispheres. Decrease of perfusion reserve was found in 146 areas of 18 hemispheres. Six hemispheres having normal rest perfusion and 12 of 15 hemispheres having rest perfusion abnormality showed reserve decrease. Three having rest perfusion defect did not change after acetazolamide in preoperative SPECT. After operation, 16 patients (89%) demonstrated clinical improvement. Fifteen among 18 hemispheres (83%) with decreased reserve improved. Rest perfusion abnormality improved in 6 among the 1.' hemispheres (40%). The areas having rest perfusion and/or reserve decrease improved in 8 : among 146 areas (60%). Decrease of reserve improved in 85% (68/80). However, areas without reserve decrease also improved in 29%(19/#66). The better was peoperative resi perfusion in involved areas or the more decreased vascular reserve, the rnore improved perfusion and reserve after operation. Conclusion: We conclude that assessment of perfusion and perfusion reserve using rest/acetazolamide brain perfusion SPECT predict the surgical outcome in patients with moyamoya disease. (Korean J Nucl Med 1998;32:314-24)
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이동수,Lee, Dong-Su 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.6
CCTV Systems have been operated in the variety of serveillance fields of the apartment, transportation, safety, physical security, and so on. And their uses are largely increasing as the CCTV transmission technology has been changed from analog to IP network way. Domestic industry has been working to upgrade from analog CCTV systems to High-Definition(HD) CCTV systems for recent years, which involves a few issues such as mixing with several transmission technologies and duplicated investment in each area because the technological analysis and criteria are specifically not arranged. This paper examines the technical issues of the transmission method between HD analog and HD IP CCTV systems, and induces the criteria of the cost analysis and its weighting factors for HD CCTV reformation. By simulating the cost analysis results of both the HD CCTV systems on apartment environment, this paper proposes the reference for the choice of HD CCTV system reformation. CCTV 시스템은 공동주택을 비롯하여, 교통, 안전, 물리보안 등 산업분야 전반에 걸쳐 다양한 용도로 운용되고 있으며, 기존 아날로그 시스템에서 IP방식으로 전환되면서 활용도가 급격하게 증가하고 있다. 산업계 현장에서는 최근 수년간 아날로그 CCTV가 고화질(HD) CCTV로 전환되고 있으나, HD 아날로그 방식과 HD IP 방식간 기술적 장단점과 기준이 명확히 제시되지 않아 여러 방식이 혼재되고 중장기적으로 중복투자의 문제를 야기하고 있다. 본 논문에서는 먼저 산업계를 주도하는 HD아날로그 방식과 HD IP 방식에 대해 기술적인 특성 및 이슈를 고찰하고, 각 방식별로 전환시 고려해야 할 비용 분석 기준 및 가중치를 설정하였다. 설정한 분석 기준을 공동주택 환경에 적용하여 시뮬레이션 결과를 구함으로써, 고화질 CCTV 시스템 전환시 선택 기준을 제시하고자 한다.
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