녹지의 규모와 기온저감효과와의 관련성에 관한 연구

윤용한(Yong Han Yoon),배병호(Byung Ho Bae) 한국환경생물학회 2002 환경생물 : 환경생물학회지 Vol.20 No.1

N/A In order to investigate relation between park scale and temperature decrease in and near parks, temperature distribution was observed and was analyzed in four parks of different scales. Relation between the temperature decrease and ratio of green coverage was also analyzed by using regression analysis. Lower temperature was observed in and near the parks and larger cooling effect was implicated near the larger parks. The result of regression analysis showed that the increase of green coverage ratio leads the decrease of the temperature in the parks. The degree of the temperature decrease varied according to the types of the coverage.

설계시공일괄발주(턴키) 설계에서 LCC를 활용한 경제성 분석 실태: 조경분야를 중심으로

윤용한 ( Yong Han Yoon ),김정호 ( Jeong Ho Kim ),한대호 ( Dae Ho Han ) 한국환경정책평가연구원 2011 환경정책연구 Vol.10 No.4

최근 5년간 시행된 턴키사업 중 공동주택단지 10개소를 선정하여 공종별 LCC 기법 적용실태를 분석하고 이 중조경분야의 적용 및 문제점을 파악하여 개선방안을 제시하고자 하였다. 연구대상지 10개소의 총 LCC 분석건수는 총151건이었고, 공종별 평균 적용비율 순위는 건축(34.4%)> 전기(21.2%)>기계(18.5%)>토목(13.2%)>조경(12.6%) 등의 순으로 조경분야가 가장 낮았다. LCC 절감액 비율은 기계(32.1%)>건축(23.9%)>전기(23.4%)>토목(17.5%)>조경(3.1%)의 순이었으며 조경분야는 LCC 분석건수가 비슷한 토목분야보다 약 5~6배 정도가 낮은 절감액을 보이고 있었다. 조경분야의 LCC 분석항목은 총 19건이었으며, 이 중 포장재 15건, 건물녹화 1건, 잔디식재 1건, 식재기반 1건, 시설물 1건 등이었다. 조경분야 LCC 분석의 활성화를 추진하기 위해서는 첫째, 조경분야 공사비 비율을 고려한 분석항목의 설정, 둘째, 조경분야의 법적 규정 및 확대 적용, 셋째, 조경분야에 적합한 VE/LCC 기준 마련등이 필요하다. In this article, I would like to analyze the conditions in applying the LCC method for each construction type by selecting 10 apartment complexes among the Turn-key projects which have been ongoing for the last 5 years. In addition, this article will identify the problems to the application of double landscape architecture and suggest improvement measures. Among the 10 case targets, a total of 151 LCC analyses were conducted, and the average application ratio placing for each construction type was shown in the following order: architecture (34.4%)> electricity (21.2%)>machine (18.5%)>civil engineering (13.2%)>landscape architecture (12.6%). As numbers show, landscape architecture was the lowest. The ratio of LCC reduction amount was shown in the following order: machine (32.1%)> architecture (23.9%)>electricity (23.4%)>civil engineering (17.5%)>landscape architecture (3.1%). The field of landscape architecture had a reduction amount that was about 5 to 6 times lower than civil engineering which had a similar number of LCC analysis cases. The total LCC analysis items of landscape architecture was 19, including 15 double packing material, 1 building covering, 1 grass planting, 1 planting infrastructure, and 1 facility. The following measures were suggested to promote LCC analysis in landscape architecture: first, set an analysis item that considers the construction expense ratio of landscape architecture; second, legal regulation of landscape architecture and expansion of its application; third, prepare VE/LCC standards which are suitable for landscape architecture.

만성 흡인을 유발하는 위 식도 역류 모델

윤용한,김루시아,조정수,김정택,백완기,김광호,Yoon, Yong-Han,Kim, Lucia,Cho, Jung-Soo,Kim, Joung-Taek,Baek, Wan-Ki,Kim, Kwang-Ho 대한기관식도과학회 2008 大韓氣管食道科學會誌 Vol.14 No.2

Background : Anti-reflux procedures treat gastroesophageal reflux (GER) disease. It is known that gastroesophageal reflux is likelyrelated to the increased incidence of chronic rejection in lung transplantation recipients. Because experimental animal studies areto verify this, we have tried to make an animal model of GER in a rat. Material and Methods : Using the SD rats weighing 250-300 g, we surgically induced gastroesophageal reflux and measured the gastrostomy time under anesthesia. Of three groups, Group I was the control, Group II had lower esophageal and anterior myotomy, and Group III had lower esophageal and anterior myotomy plusdiaphragmatic crural myotomy.The animals were scarified, and lung biopsies and histological examinations were performed 1 week, 2 weeks, 4 weeks, 8 weeks and 3 months after gastroesophageal reflux surgery. Results : Baseline animals (n=5) had no GER after charcoal instillation through a gastrostomy tube in Group I. Charcoal-laden macrophages were observed in GroupsII and III. To determine evidence of GER evidence, charcoal was instillated through the gastrostomy tube in group III. In contrast, Group II demonstrated severe neurophil infiltration in the bronchioles and alveolar walls after procedure. After 12 weeks, we observed the disappearance of neurophil, lymphocyte and histiocyte infiltration, and also occasional focal bronchopneumonia and bronchitis. Group III demonstrated neurophil and basophil infiltration in the bronchioles and alveolar walls which was more severe than that in Group II. Interstitial fibrotic changes were observed in Group III.Conclusion : The purpose of our gastroesophageal reflux model was to find evidence of aspiration. There was more evidence of aspiration in Group II than in either of theother two groups.

日本 市川市 綠地의 配置가 氣溫에 미치는 影響

尹龍漢(Yoon Yong-Han) 대한국토·도시계획학회 2000 國土計劃 Vol.35 No.3

공원녹지가 주변 열환경에 미치는 영향

윤용한(Yoon Yong-Han),송태갑(Song Tae-Gab) 대한국토·도시계획학회 1998 國土計劃 Vol.33 No.1

식재용토 재활용을 위한 건설폐토석의 개량방안 연구

윤용한 ( Yong Han Yoon ),김원태 ( Won Tae Kim ),박봉주 ( Bong Ju Park ),김현정 ( Hyun Jung Kim ) 한국녹지환경디자인학회 2007 녹지환경학회지 Vol.3 No.1

The present study examined how to improve soil from construction sites in order to reuse waste soil from construction sites, which is piled up at waste processing companies around the Sudokwon Landfill Site, as soil for planting. We selected calcium superphosphate and peat moss to resolve constraints in reusing waste soil for planting, and mixed 10.4kg of calcium superphosphate and 15L of peat moss with 1m3 of soil from construction sites. As a result, we could lower the acidity of the soil down to pH 6.5, the target of improvement of effective soil layer. We also increased organic matter contents but only up to around a fourth of 30g·kg-1, the target of improvement of organic matter contents. According to the results of herbaceous plant growth experiments using soil before and after improvement and mountain soil as a control, all seeds in mountain soil germinated within 7 days from sowing, but seeds in waste soil from construction site before and after improvement germinated 70% and 90%, respectively, on day 30 from sowing. In addition, compared to mountain soil, improved waste soil from construction site showed a difference of over 14 days in germination time. By sample soil, plant height on day 30 was 162mm in mountain soil, and next 15.0mm in improved soil, and 13.1mm in unimproved soil. Undried weight measured after the growth experiment was 6.811g per individual in mountain soil, and next 5.955g in improved soil and 5.616g in unimproved soil. The results show that the studied sample soil from construction sites can be reused as soil for planting through improvement. In addition, by accumulating research data like our results, we expect to supply soil demanded for the top soil layer of Sudokwon Landfill Site and the post-management of landfill sites and to solve environmental problems such as fly dust and spoiled landscape by abandoned heaps of waste soil from construction sites.

옥상녹화에서 혼합식재에 따른 블루페스큐와 지피초화류의 생육 반응

윤용한 ( Yoon Yong-han ),서수현 ( Suh Soo-hyun ),이선영 ( Lee Sun-yeong ),오득균 ( Oh Deuk-kyun ),주진희 ( Ju Jin-hee ) 한국환경복원기술학회 2021 한국환경복원기술학회지 Vol.24 No.5

This study was carried out to suggest an appropriate plant combination by evaluating the growth of flowering ground-cover plants planted with Festuca glauca ‘Eljiah Blue’ on the roof-top environment. As for the plant materials, Allium senescens and Chrysanthemum coreanum which are shorter than Festuca glauca ‘Eljiah Blue’ and Sedum takesimense and Agastache rugosa which are taller than Festuca glauca ‘Eljiah Blue’ were selected. Festuca glauca ‘Eljiah Blue’ was planted on Conrol, and Festuca glauca ‘Eljiah Blue’ with Allium senescens (T1), Festuca glauca ‘Eljiah Blue’ with Sedum takesimense (T2), Festuca glauca ‘Eljiah Blue’ with Agastache rugosa (T3), and Festuca glauca ‘Eljiah Blue’ with Chrysanthemum coreanum (T4) were planted in each experimental plot. Plant height and covering rate were measured to evaluate the growth of Festuca glauca ‘Eljiah Blue’. Also, relative growth rate (RGR) of plant height, RGR of plant width, and mortality rate of the flowering ground-cover plants were estimated. Plant height and cover rate of Festuca glauca ‘Eljiah Blue’ was greatest in T3. RGR of plant height was greater in the order of Agastache rugosa, Allium senescens, Chrysanthemum coreanum, and Sedum takesimense. In particular, RGR of plant width was also greatest for Agastache rugosa . Mortality rates of Agastache rugosa and Allium senescens were lowest at 11%. Therefore, based on good growth of Festuca glauca ‘Eljiah Blue’ planted with Agastache rugosa, these results were suggested as a desirable combination of plant species for rooftop gardening.

녹지에 의한 열섬현상의 저감효과에 관한 연구

윤용한(Yoon Yong-Han) 대한국토·도시계획학회 2001 國土計劃 Vol.36 No.2

Immersed Solid Method 를 이용한 외접형 기어 펌프의 수치해석

윤용한(Yong Han Yoon),박병호(Byung Ho Park),한용운(Yong Oun Han),홍병주(Byeong Joo Hong),심재술(Jaesool Shim) 대한기계학회 2014 大韓機械學會論文集B Vol.38 No.1

본 연구는 고속 회전형(~10,000 rpm) 기어펌프의 질량유량과 효율을 예측하기 위해서 2 차원 immersed solid method(ISM)를 이용한 수치해석을 수행하였다. 기어펌프와 하우징의 순환유동을 고려하기 위하여 유체 유동을 난류 유동으로 가정하였고, 기어 펌프의 입 출구의 일정 압력 조건하에 기어펌프의 회전 속도를 부가하였다. 기어펌프의 다양한 회전 속도 및 기어 끝 단과 하우징 사의의 서로 다른 간극에 대한 질량유량 및 효율을 검토하였다. 해석 결과로서, 회전 속도가 증가할수록 평균 질량유량 및 효율은 증가하였고, 기어펌프와 하우징의 간격이 증가할수록 평균 질량유량 및 효율은 감소하였다. 간격이 없는 조건하의 6,000 rpm, 8,000 rpm, 10,000 rpm 회전속도에의 효율은 각각 85.11 %, 90.94 %, 93.62 % 를 얻었고, 간격이 0 m, 0.00001 m, 0.00003 m 에 대해서 효율은 각각 93.62 %, 93.29 %, 92.74 % 를 얻었다. In this study, an ISM (immersed solid method) was used for investigating the mass flow rate and efficiency of an involute-gear pump featuring very high rotational speed. For considering circulation flow at the gear pump and housing, fluid flow was assumed as turbulent, and the rotational speed of the gear pump increased under the condition of constant pressure at both the inlet and outlet. The efficiency and mass flow rate of the gear pump were studied by varying its rotational speed and the clearance between the gear tip and the housing. In the simulation results, as the rotational speed were increased, the average mass flow rate and efficiency increased. Furthermore, as the clearance between the gear tip and the housing was increased, the average mass flow rate and efficiency decreased. The efficiency was 85.11, 90.94, and 93.62 at rotational speeds of 6,000 rpm, 8,000 rpm, and 10,000 rpm, respectively, under the condition that there was no clearance. In addition, the efficiency was 93.62, 93.29, and 92.74 at clearances of 0 m, 0.00001 m, and 0.00003 m respectively.

일본의 건축물 녹화 관련제도 연구

윤용한 ( Yong Han Yoon ),주진희 ( Jin Hee Ju ),김원태 ( Won Tae Kim ) 한국환경과학회 2010 한국환경과학회지 Vol.19 No.12

In recently, building greening to improve the urban environment is a very important areas. Thus, in order to promote the building greening is needed for the arrangement of its related system. In this study, analyzed the related system in Japan and the results obtained are as follows. Related system in Japan are to promote the spread of compulsory and dissemination of guidance. And to promote the spread of dissemination of guidance are to allowed a system to be included in green area of the site required, plans to loan the costs of greening, plans to subsidize the cost of greening, tax reduction and exemption, incentive on floor area ratio, plant supply and other technical guidance system. In conclusion, in order to promote the building greening note the related system of Japan and our related system should be arranged.