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都市街路商의 實態와 管理方案에 관한 硏究(1) : 대구 칠성시장을 사례로
이두형,김영대,이성근 嶺南大學校 環境問題硏究所 1986 環境硏究 Vol.6 No.1
Rapid urbanization that third world has experienced during the past two decades has brought about a large labor force which originated from rural Sector. Under these background, there emerged a paradigm of the economic structure of the third world cities in dualistic terms such as the formal-informal sector. Urban informal sector is recognized for its importance of constituting urban economy along with the formal sector within the economic structure of the third world. In Korea, this sector is known to account for a great portion of the society. One of the most visible and important occupation of the informal sector is hawker. The purpose of this paper is to attempt to suggest policies towards hawkers by analyzing the formation and transformation of them running business at Chilsung market in Taegu City.
해양구조물 TMCP강의 피로균열진전거동에 미치는 용접이방성 및 과대하중의 영향
최성대,이종형,三澤啓志 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6
The effect of the welding for the offshore structure in the TMCP steel on the fatigue crack propagation rate and crack opening-and-closure behavior was examined. The welding anisotropy of the TMCP steel and crack propagation character-istics of the excessive loading were reviewed (1) It seemed that a heat which was generated by the welding made a compressive residual stress over the base metal, so fatigue crack propagation rate was placed lower than in case of the base metal. (2) In the base metal, an effect of the anisotropy which has an effect on fatigue crack propagation rate of the excessive load and the constant amplitude load was not found but in the welding material case, fatigue crack propagation rate of the excessive load in the specimen of the width direction was located in the retard side as compared with a specimen rolling direction. (3) A crack opening ratio of the used TMCP steel in this study was not changed after excessive loading but a retard phe-nomenon of crack propagation was observed. Consequently, it was thought that all of the retard phenomenon of crack propagation did not only a cause of the crack opening-arid-closure phenomenon.
Ti-6Al-4V합금의 열처리가 피로균열진전특성에 미치는 영향
이종형,강용구,황은하,최성대 金烏工科大學校 産業技術開發硏究院 1999 産業技術開發硏究 Vol.15 No.-
The fatigue crack growth test under constant amplitude loading was carried out to assess the effect of heat treatment on the fatigue crack growth of a forged Ti-6Al-4V alloy. Prepared with different heat treatment i.e.annealed at 850˚C(AN), 1100˚C(β-AN) and solution treated and aged(STA). Emphasis was placed on the effect of microstructure on fatigue behaviour, in particular, fatigue crack growth and crack closure and crack deflection and roughness of fatigue fracture surface. Fractographic observation was performed using a scanning electron microscope(SEM) for fatigue fracture surface.
퍼스널 컴퓨터를 이용한 피로시험자동화 및 변동하중하의 피로균열진전특성
최성대,이상영,이종형 金烏工科大學校 産業技術開發硏究院 1999 産業技術開發硏究 Vol.15 No.-
Load such as structure and machine part are practically the cycle load. The irregular cycle load is major even in the inside of the cycle load. Then, fatigue crack propagation prediction of behavior and fatigue life prediction are very important under the variable load. Therefore, this study executed the automation of fatigue test using personal computer, and fatigue crack propagation behavior under variable load and constant amplitude load was analyzed in the comparison.
이찬형,윤현숙,박연준,권종대,노기철,장성환 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12
This study was conducted to determine the contents of heavy metals in leaves of roadside trees according to different growth stages in Daegu city. The orders of heavy metal contents in leaves of roadside tree and soil were Fe〉Mn〉Zn〉Pb〉Cu〉Cr〉Cd and Fe〉Mn〉Zn〉Cu〉Pb〉Cr〉Cd, respectively. The contents of heavy metals in leaves of roadside trees and soil showed an increasing tendency as the levels of traffic volume increased. The contents of heavy metals in leaves on October were higher than those on May.
申盛義,李性琪,崔炯一,申大允,金永範,李抵憲,姜永周 조선대학교 환경연구소 1989 環境公害硏究 Vol.6 No.-
In this study, we made investigation into water permeation, solute separation, concentration and Na^(+), K^(+), Mg^(2+), Ca^(2+), Cl^(-), SO^(2)_(4)-, HCO^(-)_(3) ions separation of seawater by the revers osmosis process using a suitable semipermeable membrane. The different thickness of membranes were prepared. On heat treatment, temperature was 80℃ and thier effects were also investigated. The flat single module system was made to be capable of treating feed solution at 200-2000cc/min and 120 atm. The experimental results can be summerized as follows: 1) As the effective operating pressure increased, permeability of pure water proportionally increased. 2) As the exposure period of the manufactured membrane in air increased, permeation rate increased, but as the thickness of the membrane increased, permeation rate decreased. 3) The capacity for being reproductive of the manufactured membrane (CA: 30wt%, Formamide: 45wt%, Acetone: 25wt%) in their performance was less than 10-30% and agreed with that reported in the literature. 4) We could separated about 85-95% of salt ion in seawater using a flat single module system.
노형철,송채훈,박형대,노재성 朝鮮大學校 스포츠科學硏究所 2003 스포츠科學硏究 Vol.14 No.-
All estimation about agineungjeok image and symbolic Imijia which is of commerce sports center image Hawibyeon is anateuma level, and intention about a ashes consumption and all appeared by anateuma level. And in service quality assessment connected with program withering member bicarbonate of soda and contrast for member affirmative .Therefore, service quality, service value, estimation level about image and ashes consumption intention that commerce sports center consumer is recognizing, word of mouth communication intention is contradictory more or less and also, bicarbonate of soda member in service quality assessment which service quality estimation connected with main equipment and employee is affirmative, and is involved with subsidiary facilities than another thing education level group bicarbonate of soda and withering member contrast for member affirmative . And estimation about symbolic image is affirmative, ashes consumption intention level is high. Exercise participation degree and service quality Hawibyeonin that other commerce sports center consumption experience Hawibyeon is do not influence in ashes consumption intention and word of mouth communication factor.
음낭외상시 고환파열에 대한 초음파 검사의 진단적 유용성
김경영,한동준,신대은,노준,문형윤,임동훈,김철성,박성운 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.3
Purpose: We determined the use of scrotal ultrasonography in the initial diagnosis and management of testicular injuries due to blunt scrotal trauma. Mateiials and Methods: We reviewed 54 patients of scrotal trauma in the last 8 years. Forty patients were evaluated by ultrasonography preoperatively. A heterogeneous echo pattern of the testicular parenchyma with loss of oval shape, contour definition was the basis for diagnosis of testicular rupture. Among them, 33 cases underwent scrotal exploration and 7 cases were managed conservatively. The remaining 14 patients were evaluated only by physical examination, 8 patients of them were explored immediately because of suspicious testicular mpture. The accuracy of ultrasonography were determined by comparing radiographic interpretations with intraoperative findings. Results: Among the 33 patients who were evaluated by ultrasonography and explored immediately, there were 26 suspected testicular ruptures on ultrasonography. Surgical exploration revealed testicular rupture in 23 and simple hematoma in 10. The testicular rupture was correctly diagnosed by ultrasonography in the 22 cases, and there were 4 false-positive and 1 false-negative diagnoses of testicular rupture. The sensivity and specificity for the diagnosis of testicular rupture are 96% and 60%, and the positive and negative predictive values are 85% and 86%, respectively, Conclusions: Scrotal ultrasonography, with the main radiographic finding of a heterogeneous echo pattern of the testicular parenchyma with loss of oval shape, contour definition, is highly sensitive on the diagnosis of testicular rupture. And it increases the salvage rate for testicular rupture with preservation of the testicular function and prevents delayed complications of chronic pain, atrophy and orchiectomy associated with missed testicular rupture.