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송길호,곽순섭,김호수,정성진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
About the steel pipe built-up scaffolding(BTS), which is being used in domestic construction sites, there are no related codes to the overall capacity of the BTS in the Industrial Safety and Health Act (ISHA) but only the ones which describe the testing method and the capacity of the each member of BTS. So we need to know the full capacity of the BTS at the time of the being used stage, not the ones of the members but the one of the total BTS frame. In this study, first, the vertical frame member which is the basic element of the BTS frame, is tested for its capacity. Second, the load test about the full strength of the BTS system are performed in two ways namely, for the first-story and the second-story BTS frame. In each case, the centric load(1/2 L) test and the eccentric load(1/4 L, 0L) tests are carried out, where L is the longer length of the BTS frame. According to the results of the experiments, first, the load endurance capacity of the first-story BTS frame are larger than the one of the second-story BTS frame at the same conditions. Second, the centric load endurance capacity is bigger than the one of the eccentric loading in the same story BTS system structure.
Phytotoxic Effects of Naturally Occurring Chemicals from Pinus koraiensis on Experimental Species
Kil, Bong-Seop,Kim, Doo-Young,Kim, Young-Sik,Lee, Seung-Yeob The Ecological Society of Korea 1991 Journal of Ecology and Environment Vol.14 No.2
To find out allelopathic potential of naturally occurring substances emitted form pinus korairnsis, water extracts and volatile sudstances of the tree materials werw provided and used for tests such as seed germination and seedling growth test. In general, the more was the concentration of the extracts and essential oils, the worse was growth effects of the selected species. The germination an the growth were inversely proportional to the concentration of the extracts and the essential oils of p. koraiensis. in other words, the chemical substances had the biological toxic activity. gc and gc/ms methods were employed for analysis and identification of phytotoxic substances from the tree leaves. Sixteen chemical compounds were identified from water extracts and nineteen from essential oils of p. koraiensis leaves. Through the experiment on germination and seedling growth test, the chemical substances naturally occurring from p. koraiensis seemed to be responsible for the allelopathic potential in this study.
조유경,Jeong Seop Moon,Dong Su Han,Yong Chan Lee,Yeol Kim,Boyoung Park,Il-Kwun Chung,Jin-Oh Kim,Jong Pil Im,Jae Myung Cha,Hyun Gun Kim,Sang Kil Lee,Hang Lak Lee,장재영,Eun Sun Kim,Yunho Jung,문창모 대한소화기내시경학회 2016 Clinical Endoscopy Vol.49 No.6
Background/Aims: In Korea, the nationwide gastric cancer screening program recommends biennial screening for individuals aged40 years or older by way of either an upper gastrointestinal series or endoscopy. The national endoscopic quality assessment (QA)program began recommending endoscopy in medical institutions in 2009. We aimed to assess the effect, burden, and cost of the QAprogram from the viewpoint of medical institutions. Methods: We surveyed the staff of institutional endoscopic units via e-mail. Results: Staff members from 67 institutions replied. Most doctors were endoscopic specialists. They responded as to whether the QAprogram raised awareness for endoscopic quality (93%) or improved endoscopic practice (40%). The percentages of responders whoreported improvements in the diagnosis of gastric cancer, the qualifications of endoscopists, the quality of facilities and equipment,endoscopic procedure, and endoscopic reprocessing were 69%, 60%, 66%, 82%, and 75%, respectively. Regarding reprocessing, manystaff members reported that they had bought new automated endoscopic preprocessors (3%), used more disinfectants (34%), washedendoscopes longer (28%), reduced the number of endoscopies performed to adhere to reprocessing guidelines (9%), and created theirown quality education programs (59%). Many responders said they felt that QA was associated with some degree of burden (48%),especially financial burden caused by purchasing new equipment. Reasonable quality standards (45%) and incentives (38%) wereconsidered important to the success of the QA program. Conclusions: Endoscopic quality has improved after 5 years of the mandatory endoscopic QA program.