고강도 콘크리트 기둥부재의 횡보강효과 산정에 관한 연구

장일영,박훈규,송재호 金烏工科大學校 1998 論文集 Vol.19 No.-

High-strength concrete represents a rather recent development in concrete materials technology. In recent years, a considerable amount of research work has been carried out on the mechanical and structural properties of high-strength concrete. However, there has been little research on the behavior of hight-strength concrete columns laterally reinforced with square ties and subjected to compressive loading. With the addition of transverse reinforcement which lead to triaxial compressive state, ductility behavior of high-strength column member shall be increased. In this study, rational quality and quantity evaluations were made to investigate the ultimate strength and strain ductility by confinement effect of tie reinforced hight-strength concrete columns subject to uniaxial loads. Concrete failure theory at the triaxial compressive state and statistical results based on conventional experimental data were applied for this propose. Up to 185 columns, tested under monotonically increasing concentric loading, were evaluated in terms of strength and strain ductility. Analytical results show that confinement stress, maximum compressive strength, and increase of strain equations were developed with the consideration of concrete strength, yield strength, spacing, volumetric ratio, and configurations of tie reinforcement.

소음성난청 유소견자들의 사후관리 실태

최장선,송재석,원종욱,강종두,차봉석,노재훈 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.2

The number of workers with noise induced hearing loss which comprise 56.9% in the total number of workers with work-related diseases in Korea of 1994, are becoming in position of the most serious problem. Periodic health examination system which was introduced for health care of workers on hazardous workplace has played important role in health care and the prevention of work-related diseases. The goal of periodic health examination may be obtained when we not only discover occupational disease, but also control them effectively. To study the post-examination health status of workers with noise induced hearing loss diagnosed from 1991 to 1994 in the periodic health examination, all 154 workers in 102 manufacturing factories in Banwol and Siwha industrial complex were reviewed. 1. Among 154 workers, 87 workers(56.5%) were changed to different department, 67 workers(43.5%) remained in the same department. 2. Among 102 workplaces, only 23 workplaces(22.9%) had changed their working environment while 79 workplaces(77.1%) did not. 3. In this study, post-examination health care of the workers diagnosed as noise induced hearing loss had significant correlated with the presence of health care manager, Industrial Health and Safety Committee in workplace and size of industry. The improvement of working environment is also closely related with the presence of health care manager in workplace. 4. Among 154 respondents, 3 workers(1.9%) had received compensation while 151 workers(98.1%) did not. 5. The reasons for not requesting the compensation were that 117 workers(77.5%) were ignorant of the administrative procedure for compensation, 30 workers(19.9%) were not sure of receiving compensation, 4 workers(2.6%) were busy. Considering the result of this study, we must establish the guide of management or contents of post management for noise induced hearing loss. To prevent the noise induced hearing loss, and protect the workers with noise induced hearing loss, education about post management is much required for employer and employee.

압출성형에 의한 국산 무연탄 활성탄의 세공구조 변화

이송우,문장천,김도한,이창한,최동훈,류동춘,송승구 부산대학교 환경문제연구소 2000 環境硏究報 Vol.18 No.-

The purpose of this study is to investigate the variation of pore size distribution of the coal-based extruded activated carbon. The extruded activated carbon was prepared by extruding the mixture of coal powder and coal tar. Pore size distribution of the extruded activated carbon was compared with that of the extruded coal and the extruded char. Also it was compared with that of the crushed activated carbon, raw coal and char. The extruded coal had coarser surface than that of raw coal. Macropores of the extruded coal were funned near 10,000Å in diameter during carbonization process and steam penetrated easily between particles and were growing between 3,000Å and 20,000Å in diameter during activation process.

색상 측정 기기를 이용한 복합레진 적층 수복과 단일 수복의 색상 비교 분석

송영상,김자현,이빈나,장지현,장훈상,황윤찬,오원만,황인남 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2

Objectives: This study analyzed the difference in color caused by different thickness in enamel layer of composite resins when applied with single and layering placement technique, and evaluated if the results agreed with the shade guide from the manufacturers to verify reliability of the color matching process of the manufacturers. Materials and Methods: For single composite resin samples, 6 mm diameter and 4 mm thickness cylindrical samples were fabricated using Ceram-X mono (DENTSPLY DeTrey) and CIE L*a*b* values were measured with spectrophotometer. Same process was done for layering compositie resin samples, making 3 dentinal shade samples, 4 mm thickness, for each shade using Ceram-X duo (DENTSPLY DeTrey) and enamel shade resins were layered in 2 mm thickness and CIE L*a*b* values were measured. These samples were ground to 0.2 mm thickness each time, and CIE L*a*b* values were measured to 1 mm thickness of enamel shade resin. Results: Color difference (△E*) between single and layering composite resin was 1.37 minimum and 10.53 maximum when layering thicknesses were between 1 mm and 2 mm and 6 out of 10 same shade groups suggested by manufacturer showed remarkable color difference at anythickness (△E* > 3.3). Conclusion: When using Ceram-X mono and duo for composite resin restoration, following the manufacturer's instructions for chossing the shade is not appropriate, and more accurate information for Ceram-X duo is needed on the variation and expression of the shades depending on the thickness of the enamel. (Restor Dent Endod 2012;37(2):84-89)

내시경적 역행성 췌담관조영술중 췌선방 조영 후 발생한 중증 췌장염 1예

장세중,기승석,김훈일,신혜영,박장원,송은훈,태재웅 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

내시경적 역행성 담췌관조영술 후 발생한 급성췌장염의 발생인자로 여러 가지 인자들이 관여하지만 특히 담췌관조영술 시행 후 과도한 췌선방 조영화에 의한 중증의 췌장염 증례를 경험하였기에 보고하는 바이다 Endoscopic retrograde cholangiopancreatography (ERCP) has been considered as a valuable tool for the diagnosis and management of disease of the pancreas and biliary tree. Post-ERCP pancreatitis is the most frequent and clinically significant complication following ERCP. But a few complication associated with this procedure are unforeseeable. Specially, acinarization as a result of a careless cooperation between operator and assistant may be influenced in complications of ERCP. Severe post-ERCP pancreatitis is rare complication, and its prognosis will be poor. Therefore, careful process and good relationship between operator and assistant in ERCP may be prevented this complication, but is not clear. Neglect of acinarization may be resulted in more aggravation of pancreatitis. We have cared for one patient with severe post-ERCP pancreatitis with pseudocyst after water-soluble contrast media spreading into the acini (acinarization) via ERCP in resolving phase idiopathic pancreatitis.

Using ladder entrance traps to capture azure-winged magpies, brown-eared bulbuls and black-billed magpies in Korea

Song, Jang Hoon,Clapperton, B. Kay,Park, Chan Ryul,Cho, Young Sik,Lim, Kyeong Ho,Lee, Han Chan Taylor Francis 2015 International journal of pest management Vol.61 No.4

Sclerotinia Twig Blight on Trees and Cottony Rot on Fruits of Satsuma Mandarin Caused by Sclerotinia sclerotiorum

Song, Jang-Hoon,Koh, Young-Jin The Korean Society of Plant Pathology 1999 Plant Pathology Journal Vol.15 No.4

Sclerotinia twig blight on trees and cottony rot on fruits of Satsuma mandarin were observed in Cheju, Korea in 1996 and 1997. The causal fungus causing citrus twig blight and cottony rot was identified as Sclerotinia sclerotiorum which had cup-shaped apothecia bearing hyaline and clavate asci and periphyses on sclerotium. Symptoms were produced on twigs, developing young leaves, fully developed new leaves, and fruits 2-9 days after wound inoculation, but only on twigs with young lateral buds and developing young leaves by unwound inoculation. The fungus grew well between 10 and $27^{\circ}$, but optimum temperature was $24^{\circ}$ on potato dextrose agar. Most varieties were highly susceptible to S. sclerotiorum, whereas some varieties such as Ichinan were relatively resistant among twelve Satsuma mandarin varieties in the field. This is the first record of Scledrotinia twig blight on trees and cottony rot on stored fruits of Satsuma mandarin in Korea.

Poster Session : PS 0918 ; Lower GI Tract : Two Cases of Postoperative Colonic Stenosis Treated by Endoscopic Insulated-Tip Diathermic Knife

( Jang Hoon Kwon ),( Koon Hee Han ),( Moon Ho Kim ),( Woo Sung Jang ),( Jung Ho Yun ),( Yun A Song ),( Jong Kyu Park ),( Gab Jin Cheon ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: Recently published series have indicated that postoperative colonic stenosis can occur in 5% to 46% of patients. Endoscopic therapy with balloon dilation and temporary stents offers a minimally invasive method for surgical revision of benign anastomotic colonic stenoses. The balloon dilation of a stenotic segments of the gastrointestinal tract has been proven to be a convenient and less invasive treatment method for most patients, but repeated dilation may be required. Complications associated with endoscopic therapy, including perforation, bleeding, technical failure, and stent migration, have been reported. Further, a few cases of anastomotic colonic stenosis treated by electrocautery therapy have been reported. Methods: In the present case report, we describe two cases of post-operative symptomatic anastomotic stenosis that were successfully treated by electrocautery incision therapy using an IT-knife. Results: Radial incisions were made with the IT-knife If colon muscular layer is damaged during radial incision, the risk of perforation could be increased, so the depth of the incision, estimated by comparison with the known width of the open biopsy forceps, was not deeper than muscular layer. There was no immediate or delayed procedure- related complication such as bleeding or perforation. Conclusions: We consider that electrocautery incision therapy using an IT-knife could be a suitable alternative method. Benign short-segment stricture on a portion of the digestive tract also seems a suitable indication for electrocautery therapy.

Sclerotinia Twig Blight on Trees and Cottony Rot on Fruits of Satsuma Mandarin Caused by Sclerotinia sclerotiorum

Jang Hoon Song,Young Jin Koh 한국식물병리학회 1999 Plant Pathology Journal Vol.15 No.4

Current Practices for Birds' Damage Control in Korea

Jang-Hoon Song,Young-Sik Cho,Jae-Cheol Kim 한국원예학회 2008 한국원예학회 기타간행물 Vol.- No.-