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- 저자 : 김지연 ( Kim J I-yeon ) (검색결과 2 건)
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빗물 저류 시스템을 활용한 옥상 녹화의 온도 저감 효과
윤석환 ( Yun Seok-hwan ),김은섭 ( Kim Eun-sub ),박정강 ( Piao Zheng-gang ),전윤호 ( J Eon Yoon-ho ),강혜원 ( Kang Hye-won ),김상혁 ( Kim Sang-hyuck ),김지연 ( Kim J I-yeon ),강한민 ( Kang Han-min ),함은경 ( Ham Eun-kyung ),이동근 한국환경복원기술학회 2021 한국환경복원기술학회지 Vol.24 No.6
Thermal environment of city is getting worse due to severe urban heat island caused by climate change and urbanization. Green roof improves the urban thermal environment and save the cooling energy in buildings. This study presented a green roof combined with a storage system that stores rainwater and supplies water through a wick and evaluated the temperature reduction effect as surface temperature and amount of evapotranspiration. For about a week, the surface temperature using a infrared thermal imager and the evapotranspiration by recording change of module weight were measured at intervals of 30 minutes from sunrise to sunset. The results show that the mean surface temperature of the green roof was 15.4 degrees lower than that of the non-green roof from 12:00 P.M. to 14:00 P.M. There was no significant difference between mean surface temperature of green roof with and without storage system immediately after rain, but more than a week after rain, there was a difference with average of 2.49 degrees and maximum of 4.72 degrees. The difference in daily amount of evapotranspiration was measured to be 1.66 times on average. As drought stress increased over time, the difference in daily amount of evapotranspiration and surface temperature between with/without storage system increased simultaneously. The results of the study show a more excellent cooling effect of green roof combined with the rainwater storage system.
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이경하(Kyung-Ha Lee),송인상(In-Sang Song),설지영(Ji-Young Sul),김지연(Ji-Yeon Kim),전광식(Kwang-Sik Chun),이상일(Sang-Il Lee),강대영(Dae-Young Kang),최송이(Song-I Choi),노승무(Seung-Moo Noh) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.6
Purpose: Gastrointestinal stromal tumors (GISTs) possess highly variable clinical behaviors and the study thereof is insufficient. There are no standard guidelines for diagnosis and treatment of GISTs, so it is difficult to predict recurrences and conduct appropriate treatments. Throughout the last 10 years of experiences with GIST patients, we have identified the variables predicting recurrences and classified the risk groups by NIH classification, Fletcher risk stratification and UICC TNM stage. Methods: From January 1998 to December 2007, 88 patients with pathologic confirm and surgical resection were diagnosed with GISTs. GISTs were diagnosed when the tumor had characteristic histologic features and confirmed positive by KIT, CD34, or PDGFRA. Results: The size, mitotic index, existence of symptoms, and origins of tumor correlate statistically with recurrence (0.002, <0.001, 0.027, 0.011). The NIH classification, Fletcher risk stratification and UICC TNM stage are correlated with recurrence (0.001, <0.001, <0.001) and 5 year disease free survival, statistically (0.009, <0.001, <0.001). Fifteen patients experienced recurrences. 14 patients were treated with imatinib, and 6 of them showed a response to the treatment. All 4 patients who had R1 resection did not survived due to the progression of the disease. Conclusion: The patients with large, high mitotic index, symptomatic, or extra-gastric tumor require strict surveillance. Also, patients with low risk must be under surveillance due to the possibility of recurrence. It is important to perform R0, en bloc resection. Although the imatinib is the treatment of choice with recurred or metastatic GISTs, the disease is likely to develop resistance, further studies on newly targeted therapy is in need.
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