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살충제 Flubendiamide의 복숭아 품종에 따른 잔류양상
김효영 ( Hyo Young Kim ),황정인 ( Jeong In Hwang ),이은향 ( Eun Hyang Lee ),전영환 ( Young Hwan Jeon ),김지환 ( Ji Hwan Kim ),안지운 ( Ji Woon Ahn ),박현주 ( Hyun Ju Park ),정창국 ( Chang Kook Chung ),김산영 ( San Yeong Kim ),이 한국환경농학회 2012 한국환경농학회지 Vol.31 No.2
BACKGROUND: This research has investigated the residue patterns of insecticide flubendiamide on three species of peaches with different surface forms, and the residue amounts of them when mixed with a spreader. METHODS AND RESULTS: Pesticide used for field application on peaches was 20% flubendiamide of suspension concentrate (SC) and was sprayed at a recommended rate. The residue amounts of flubendiamide in peach were analyzed by HPLC equipped with UV detector. After the observation with a microscope, the rank of fuzz amount on peach`s surface was Kurakatawase, Wolmi in descending order and Cheonhong did not have any fuzz. The residue amounts of flubendiamide were 0.54mg/kg for Kurakatawase, 0.43 mg/kg for Wolmi and 0.10mg/kg for Cheonhong, respectively. When flubendiamide was used with a spreader, polyoxy ethylene methylpoly siloxane, the residue amount for Kurakatawase barely changed at 0.55 mg/kg regardless of mixing with a spreader, and at 0.53 mg/kg for Wolmi. In Cheonhong, the residue amount was 0.48 mg/kg, which increased by 4.8 times due to the use of a spreader. CONCLUSION: This result indicates that the residue amounts of flubendiamde were affected by the surface forms of peaches, and in the presence of a spreader the residue amount did not increase in fuzzy species, but was affected greatly for species without fuzz.
鄭熺孝,安光列,李承烈,朴泳珏,金庚映 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-
When steel member is processed in filed, we can use cutting and welding. Cutting and welding generated residual stress and residual deformation in steel members. In this study. two cutting method is gas cutting and plasma cutting. Gas cutting method generate high heat temperature than plasma cutting method. It decrease that tensile strength and elastic modulus of test specimen cutting by two method. Gas cutting steel members are generated lower tensile strength and elastic modulus than plasma cutting method steel members. Elastic modulus important structure member. So, suitable cutting method is selected by magnitude degree of structure.
( Dong Won Ahn ),( Ju Hyun Shim ),( Jung Hwan Yoon ),( Chung Yong Kim ),( Hyo Suk Lee ),( Yeong Tae Kim ),( Yoon Jun Kim ) 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.2
Background/Aims: Needle-track seeding is a rare but important complication of diagnostic and therapeutic ultrasound (US)-guided procedures in hepatocellular carcinoma (HCC). We examined the frequency of needle-track seeding after US-guided percutaneous ethanol injection (PEI), fine-needle aspiration biopsy (FNAB), and percutaneous transhepatic biliary drainage (PTBD) in order to determine the appropriate treatment for needle-track seeding and its clinical outcome. Methods: We analyzed the clinical characteristics and treatment outcomes in eight patients who experienced needle-track seeding from HCC after an US-guided procedure (FNAB, PEI, or PTBD) between January 1990 and July 2004. Results: Seven (0.14%) of 5,092 patients who experienced needle-track seeding (2 after PEI, 4 after FNAB, and 1 after PTBD) during the study period and 1 other patient who experienced needle-track seeding recently were recruited for this study. Two of the eight patients underwent mass excision and the other six patients underwent en-bloc wide excision for the needle-track seeding. Tumors recurred in the needle-tracks in both patients who underwent mass excision but not in the six patients who underwent en-bloc wide excision. Mortality occurred in three patients who experienced the recurrence and progression of intrahepatic HCC. Conclusions: The incidence of needle-track seeding after US-guided procedures in HCC was 0.14%. En-bloc wide excision seems to be the optimal treatment for minimizing the probability of tumor recurrence due to needle-track seeding.
Design and Implementation of a Ubiquitous Robotic Space
Wonpil Yu,Jae-Yeong Lee,Young-Guk Ha,Minsu Jang,Joo-Chan Sohn,Yong-Moo Kwon,Hyo-Sung Ahn IEEE 2009 IEEE transactions on automation science and engine Vol.6 No.4
<P>This paper describes a concerted effort to design and implement a robotic service framework. The proposed framework is comprised of three conceptual spaces: physical, semantic, and virtual spaces, collectively referred to as a ubiquitous robotic space. We implemented a prototype robotic security application in an office environment, which confirmed that the proposed framework is an efficient tool for developing a robotic service employing IT infrastructure, particularly for integrating heterogeneous technologies and robotic platforms.</P>
Periodontal inflamed surface area as a novel numerical variable describing periodontal conditions
Park, Shin-Young,Ahn, Soyeon,Lee, Jung-Tae,Yun, Pil-Young,Lee, Yun Jong,Lee, Joo Youn,Song, Yeong Wook,Chang, Yoon-Seok,Lee, Hyo-Jung Korean Academy of Periodontology 2017 Journal of Periodontal & Implant Science Vol.47 No.5
Purpose: Chronic periodontitis is an inflammatory disease induced by pathogenic bacterial accumulation. A novel index, the periodontal inflamed surface area (PISA), represents the sum of the periodontal pocket depth of bleeding on probing (BOP)-positive sites. It is advantageous for data processing and analysis because it can be treated as a continuous variable to quantify periodontal inflammation. In the present study, we evaluated correlations between PISA and periodontal classifications, and examined PISA as an index integrating the discrete conventional periodontal indexes. Methods: This study was a cross-sectional subgroup analysis of data from a prospective cohort study investigating the association between chronic periodontitis and the clinical features of ankylosing spondylitis. Data from 84 patients without systemic diseases (the control group in the previous study) were analyzed in the present study. Results: PISA values were positively correlated with conventional periodontal classifications (Spearman correlation coefficient=0.52; P<0.01) and with periodontal indexes, such as BOP and the plaque index (PI) (r=0.94; P<0.01 and r=0.60; P<0.01, respectively; Pearson correlation test). Porphyromonas gingivalis expression and the presence of serum P. gingivalis antibodies were significant factors affecting PISA values in a simple linear regression analysis, together with periodontal classification, PI, bleeding index, and smoking, but not in the multivariate analysis. In the multivariate linear regression analysis, PISA values were positively correlated with the quantity of current smoking, PI, and severity of periodontal disease. Conclusions: PISA integrates multiple periodontal indexes, such as probing pocket depth, BOP, and PI into a numerical variable. PISA is advantageous for quantifying periodontal inflammation and plaque accumulation.
Clinical Efficacy of Endovascular Abdominal Aortic Aneurysm Repair
Bong-Su Son,정성운,Chungwon Lee,Hyo Yeong Ahn,Sangpil Kim,Chang Won Kim 대한흉부외과학회 2011 Journal of Chest Surgery (J Chest Surg) Vol.44 No.2
Background: Endovascular aortic aneurysm repair (EVAR) has come into use and been widely extended because of the low complication rate and less-invasiveness. This article aimed to describe our experience in the treatment of abdominal aortic aneurysm with EVAR. Materials and Methods: A retrospective review was conducted for the 22 patients who underwent EVAR in a single hospital December 2001 to June 2009. Results: The mean age of the patients was 68.5±7.6 years. There were several risk factors and comorbidities in 20 patients (90.9%). The mean diameter of the aortic aneurysms was 61.2±12.9 mm. The mean length, diameter, and angle of the aneurysmal neck were 30.5±15.5 mm, 24.0±4.5 mm, and 43.9±16.0˚, respectively. The mean follow-up period of the patients was 28.8±29.5 months. The 30-day postoperative mortality was none. Seven patients (31.8%) had endoleaks during the hospital stay and three patients (13.6%) had endoleaks during the follow-up period. One patient (4.5%)died due to a ruptured aortic aneurysm. The cumulative patient survival rates were 88.2%, 88.2%, and 70.6% at 1, 3, and 5 years of follow-up, respectively. Conclusion: EVAR is currently a safe, feasible procedure for high risk patients with abdominal aortic aneurysm because of low postoperative complication and mortality if patients are selected properly and followed up carefully.
( Yewon Kang ),( Wanho Yoo ),( Youngwoong Kim ),( Hyo Yeong Ahn ),( Sang Hee Lee ),( Kwangha Lee ) 대한결핵 및 호흡기학회 2020 Tuberculosis and Respiratory Diseases Vol.83 No.2
Background: The purpose of this study was to investigate the effect of early tracheostomy on clinical outcomes in patients requiring prolonged acute mechanical ventilation (≥96 hours). Methods: Data from 575 patients (69.4% male; median age, 68 years), hospitalized in the medical intensive care unit (ICU) of a university-affiliated tertiary care hospital March 2008-February 2017, were retrospectively evaluated. Early and late tracheostomy were designated as 2-10 days and >10 days after translaryngeal intubation, respectively. Results: The 90-day cumulative mortality rate was 47.5% (n=273) and 258 patients (44.9%) underwent tracheostomy. In comparison with the late group (n=115), the early group (n=125) had lower 90-day mortality (31.2% vs. 47.8%, p=0.012), shorter stays in hospital and ICU, shorter ventilator length of stay (median, 43 vs. 54; 24 vs. 33; 23 vs. 28 days; all p<0.001), and a higher rate of transfer to secondary care hospitals with post-intensive care settings (67.2% vs. 43.5% p<0.001). Also, the total medical costs of the early group were lower during hospital stays than those of the late group (26,609 vs. 36,973 USD, p<0.001). Conclusion: Early tracheostomy was associated with lower 90-day mortality, shorter ventilator length of stay and shorter lengths of stays in hospital and ICU, as well as lower hospital costs than late tracheostomy.