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인장력을 받는 ㄷ형강 고력볼트 접합부의 감소계수 U값에 관한 연구
김진숙,표영석,나승욱,신영록,김보영,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
The purpose of this paper is to examine the influence of reduction coefficient according to the limit state design of steel structures in the bolted joints of tension members. It was carried out the tensile testing about high strength bolted connections performed in structural steel channels. Considered parameters are the number and row of bolts, the connection length, connection eccentricity of the specimen. The test results showed that failures generally came (a) classic net section, (b) block shear failures. We found that the professional factor, obtained by calculating the test failure load divided by the nominal specification strength, is lower than 1.00. We thought that the reason was the moment produced by eccentric loading depends upon the connection geometry as well as the rotational stiffness of the connection.
The Single Incision Laparoscopic Intragastric Wedge Resection of Gastric Submucosal Tumor
Jin-Uk Na,Sang-Il Lee,노승무 대한위암학회 2011 Journal of gastric cancer Vol.11 No.4
Purpose: Laparoscopic wedge resection of gastric submucosal tumor may be difficult in case of the endophytic mass or the mass located unreachable area such as cardia, and intragastric approach can be useful. We would present the experiences of the intragastric wedge resection. Materials and Methods: There were 7 patients diagnosed as gastric submucosal tumor and underwent the intragastric wedge resection at Surgery, Chungnam National University Hospital. We reviewed medical record. Results: There were 3 male and 4 female. Mean age was 65 years-old (57~73). Mean body mass index was 26.28 kg/m2 (21.28~35.30). Location of lesions was 4 cardia, 2 fundus and 1 midbody, respectively. Mean operation time was 83.6 minutes (70~105). All patients were healed without any complication. Mean postoperative hospital stay was 5.4 days (4~6). Mean size was 2.7 cm (2.3~3.8). Pathologic finding was 5 gastrointestinal stromal tumor and 2 leiomyoma. Conclusions: The single incision intragastric wedge resection of gastric submucosal tumor is feasible and acceptable, especially in mass of gastric upper part.
The Single Incision Laparoscopic Intragastric Wedge Resection of Gastric Submucosal Tumor
Na, Jin-Uk,Lee, Sang-Il,Noh, Seung-Moo The Korean Gastric Cancer Association 2011 Journal of gastric cancer Vol.11 No.4
Purpose: Laparoscopic wedge resection of gastric submucosal tumor may be difficult in case of the endophytic mass or the mass located unreachable area such as cardia, and intragastric approach can be useful. We would present the experiences of the intragastric wedge resection. Materials and Methods: There were 7 patients diagnosed as gastric submucosal tumor and underwent the intragastric wedge resection at Surgery, Chungnam National University Hospital. We reviewed medical record. Results: There were 3 male and 4 female. Mean age was 65 years-old (57~73). Mean body mass index was 26.28 kg/$m^2$ (21.28~35.30). Location of lesions was 4 cardia, 2 fundus and 1 midbody, respectively. Mean operation time was 83.6 minutes (70~105). All patients were healed without any complication. Mean postoperative hospital stay was 5.4 days (4~6). Mean size was 2.7 cm (2.3~3.8). Pathologic finding was 5 gastrointestinal stromal tumor and 2 leiomyoma. Conclusions: The single incision intragastric wedge resection of gastric submucosal tumor is feasible and acceptable, especially in mass of gastric upper part.
원저(原著) : 제대혈액에서 중간엽 줄기세포의 존재 확인
김진욱 ( Jin Uk Kim ),최범열 ( Bum Ryoul Choi ),나동진 ( Dong Jin Na ),문희주 ( Hi Joo Moon ),한훈 ( Hoon Han ) 대한임상병리사협회 2002 임상수혈검사학회 발표자료집 Vol.7 No.1
The sources of tem cells are embryonic stem cells, adult stem cell and neonatal stem cells which could be obtained from placenta and cord bloods. Embryonic stem cells can differentiate into several kinds of tissues but have ethical problems and possibilities to develope into other kinds of tissues or tumor after differentition. In case of adult stem cell, even though it is easy to acquire, there are several problems such as delayed growth rate in aging process and shortage of telomere for multiple differentiation. Neonatal stem cells are easy to acquire and have several advantages such as low risk of infection, long telomere and large proliferative capacity. We isolated the estimated mesenchymal stem cells from human umbilical cord bloods which were mixed with not only hematopoietic stem cells but also granulocytes and lymphocytes etc. and confirmed the self-renewal capacity by growing sequential passage culture. These cells from the spindle shaped cells were obtained from mononuclear cell culture of umbilical cord blood for two months and expressed cell surface antigen CD13, CD90, CD105, α-smooth muscle actine and cytoplasmic antigen vimentine. When cultured these cells in bone formation media, we observed the formation of extracellular matrix and increased expression of alkaline phosphatase so verified the differerntiation bone tissue specific cells from these cells. Consequetly cord blood contains mesenchymal stem cells and could be a new source of stem cell instead of embryonic stem cells.
Jeong-Jin An,Young-Uk Park,Ki-Su Ahn,Hyun-Na Koo,Gil-Hah Kim 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05
Insecticidal susceptibilities of 16 registered insecticides on each developmental stages of Phthorimaea operculella were investigated and further examined the contact, oral and residual toxicities after chosen from insecticides showing good effect. Mortality, longevity and effect on reproduction of 16 insecticides to P. operculella adults were also investigated. To the eggs and pupae, only spinosad showed 71.1% inhibition rate of egg hatch and 66.7% inhibition rate of emergence. To the 3rd nymphs, fenitrothion (LC50 336.6 ppm), esfenvalerate (LC50 8.6 ppm), ethofenprox (LC50 35.7 ppm), and emamectin benzoate (LC50 0.05 ppm) showed oral toxicity over 90% and esfenvalerate (LC50 0.87 ppm), ethofenprox (LC50 16.5 ppm), emamectin benzoate (LC50 0.53 ppm), and spinosad (LC50 2.48 ppm) showed the contact toxicity over 90%. To the adults, mortalities of insecticides were showed as below: deltamethrin and spinosad showed perfect mortality 48 h after treatment; esfenvalerate, ethofenprox, and thiamethoxam showed 40 - 60% mortalities; but the others are not showed any effect. Fecundities of female adults were inhibited by esfenvalerate, emamectin benzoate, and dinotefuran, compare to that of the control, but there were no statistical differences to that of ethofenprox, benfuracarb, thiamethoxam, clothianidin, and diflubenzuron. Adult longevity was showed no difference compare to that of the control. Residual effect of emamectin benzoate showed perfect insecticidal activity at 14 days after treatment and the next ethofenprox showed over 90% at 7 days after treatment.
Young-Uk Park,Sun-Ran Cho,Jin-Won Jeong,Hyun-Na Koo,Changmann Yoon,Gil-Hah Kim 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05
The repellency, insecticidal activity and repellency duration effect of dagalet thyme, Thymus quinquescostatus against Asian tiger mosquito, Aedes albopictus larvae and adults was investigated. Whole plant body of T. quinquescostatus proved to have the repellent activity of 91.2% against A. albopictus adults. The constituents of T. quinquescostatus were analyzed using GC-MS as follows: α -pinene (1.1%), α-thujene (2.7%), camphene (1.3%), myrcene (4.7%), α-terpinene (5.0%), ɤ-terpinene (33.0%), ρ-cymene (8.3%), β-caryophyllene (4.0%), β-bisabolene (8.9%), thymol (29.9%), and carvacrol (1.2%). Among them, thymol has the perfect repellency on A. albopictus adults and confirmed the electrophysiological response on the antenna of A. albopictus adults. To enhance the maintenance, vanillin was added. Duration of effectiveness of mixture with vanillin (0.18 : 0.36 ㎕/㎠) were significantly more prolonged than thymol alone. The constituents on its original oils were applied onto A. albopictus larvae. The thymol, α-terpinene and carvacrol (LC50 = 9 mg litre-1) revealed to have high insecticidal activity.
Na, Yu-Mi,Kim, Kwang-Soo,Lee, Kyoung-Uk,Chae, Jeong-Ho,Kim, Jin-Ho,Kim, Dai-Jin,Bahk, Won-Myong,Jang, Yun-Sig,Lee, Ae-Kyoung,Woo, Young Sup,Lee, Pyeoung-Soo Yonsei University, College of Medicine 2007 Yonsei medical journal Vol.48 No.5
<P><B>Purpose</B></P><P>To evaluate the relationship between depressive symptoms and health care costs in outpatients with chronic medical illnesses in Korea, we screened for depressive symptoms in 1,118 patients with a chronic medical illness and compared the severity of somatic symptoms and health care costs.</P><P><B>Patients and Methods</B></P><P>Data were compared between outpatients with depressive symptoms and those without depressive symptoms. Depression and somatic symptoms were measured by Zung's Self-rating Depression Scale (SDS) and Patient Health Questionnaire (PHQ)-15, respectively. We also investigated additional data related to patients' health care costs (number of visited clinical departments, number of visits made per patients, and health care costs). A total of 468 patients (41.9%) met the criteria for depressive disorder.</P><P><B>Results</B></P><P>A high rate of severe depressive symptoms was found in elderly, female and less-educated patients. A positive association between the severity of somatic symptoms and depressive symptoms was also identified. The effects of depressive symptoms in patients with chronic illnesses on three measures of health services were assessed by controlling for the effects of demographic variables and the severity of somatic symptoms. We found that the effects of depressive symptoms on the number of visited departments and number of visits made per patients were mediated by the severity of somatic symptoms. However, for health care costs, depressive symptoms had a significant main effect. Furthermore, the effect of gender on health care costs is moderated by the degree of a patient's depressive symptoms.</P><P><B>Conclusion</B></P><P>In summary, there is clearly a need for increased recognition and treatment of depressive symptoms in outpatients with chronic medical illnesses.</P>