전방 추체간 유합술 및 후방 고정술시 추간판, 추간공 및 척추관의 변화

전창훈,김용찬,김남현,송경훈 대한척추외과학회 2004 대한척추외과학회지 Vol.11 No.1

지역별 건설업 인력수급 현황 분석에 관한 연구

전찬민,전용일,황찬수,박태근 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

In currency crisis(IMF relief loan), the construction industry has prepared a foundation for existence by taking such desperate countermeasure as reducing a lot of construction companies and readjusting the their structure. Even though a number of employee of construction industry came to a million in 1996, it reduced to 980 thousand in 1997 and 710 thousand in 1998. After 1998, there was the trend about reducing a number of employee every year. The final goals of this study have inquired into the current situation of manpower supply and demand per region, compared and analyzed the circumstance of manpower supply and demand, and utilized references in decision-making between construction companies and students.

구상흑연 주철의 열처리 조건이 기계적 성질에 미치는 영향

전언찬,정하돈,김순경,김용직 東亞大學校 大學院 1998 大學院論文集 Vol.23 No.-

Because the spheroidal graphite cast iron, the cast iron cristallized the graphite to sphericity during the solidification process after annexing Mg etc to the general grey cast iron furnace, the form of the graphite is more spheric than the grey cast iron, has the less notch effect, it is a very excellent metal material on the strength an toughness due to the decrease of the stress concentraion. Therefore, the case which uses it instead of forfing or case steel material used for the industrial machinery parts of various kinds and automobile parts is increasing gradually. The purpose of this study is to increase abration resistance after improving the hardness of the sphericity graphite cast iron used as the valve seat of air compressor. We obtained the following result through experiment on the change of structure and mechanical property according to the heat treat cycle. Because the abration resistance is closely related with the volume of martensite, the hardness and the aration resistence have improved and the structure of martensite has increased as the cooling rate is fast. Therefore, the best heat treatment which considers tensile strength and elongation percentage, the most suitable method, is that austempering is done the constant temperature process about 2 hours at 750℃ then the cooling is done in the condition of opened furnare after making the condition of austenitizing do the constant temperature process ofr 2 hours at 950℃.

전방 추체간 유합술 및 후방 고정술시 추간 판 및 추간 공 높이의 변화

전창훈,김용찬,정남수 대한척추외과학회 2003 대한척추외과학회지 Vol.10 No.3

구조용 세라믹재료의 피연삭성에 관한 연구

이종찬,강용구,이태원,전영길,하상백 金烏工科大學校 1998 論文集 Vol.19 No.-

Structural ceramics have been widely used in engineering parts. It, however, is very difficult to grind the ceramics with desired shape and dimensional accuracy because of their high hardness, strength, and brittleness. Grindability of structural ceramics are quite different as they have different mechanical and physical properties. This paper compares the grindability of structural ceramics such as Al₂O₃Si₃N₄and SiC. The grinding experiments include the measurement of grinding force, surface roughness. and SEM observation. The experimental results indicate that Si₃N₄consumes the highest specific grinding energy among the three kinds of ceramics. It was also found that there is no corelationship between grindability and surface roughness of ground surface.

공공청사 기계실의 소요공간 추정식

박찬식,전용석 중앙대학교 건설산업기술연구소 2003 건설산업기술연구소 논문집 Vol.4 No.-

There is not an exact regulation and guidance on mechanical equipment space for the government building. It brings about financial loss because of design change and rework, and decrease building function. As MERS(mechanical equipment room size), MERH(mechanical equipment room height) and PSRS(pipe-shaft room size) cause many problems on cost and function during construction and maintenance phase, it is required to obtain the accurate data needed in design phase. This study collected data that are relevant to building mechanical equipment space of 35 government buildings, also suggested a linear regression model in order to estimate the building mechanical equipment space of government buildings.

도시특성을 고려한 교통유발계수 산정에 관한 연구 : 대전시를 중심으로 In the City of Daejeon

김명수,전찬용,황현종 한밭대학교 2004 한밭대학교 논문집 Vol.21 No.-

The biggest problem in urban transport is congestion. The purpose of this study is to understand "Electronic Road Pricing System, which is one of the traffic demand control plan for relieving such a traffic congestion, and look for the plans to improve it. For this, traffic inducement coefficient was selected, which shows the regional characteristic of Daejeon through investigation on each facility. As one can see from the investigated inducement coefficient, the same type of facilities show different characteristics. Also, it is thought that per unit burden charge that has been maintained for over 20 years should be raised relevantly in consideration to inflation. Also, it is thought that several ways have to be sought for the facility owners' active participation in the traffic volume reduction program. Studies like this research would bring the following items as their effect; Relieve traffic congestion(partly) and reduce the passage time. Personal benefits following fuel cost etc. Socio-economic effect following logistics cost and environmental pollutants etc.

소아의 상완골 원위부 과간 골절

이우석,정환용,김우식,김용찬,전택수,김남현,김규태 대한골절학회 2004 대한골절학회지 Vol.17 No.4

상완골 원위부 과간 골절은 소아에서는 매우 드물게 발생되는 골절로 대부분 주관절의 굴곡상태로 주관절 후방부에 직접적인 충격에 의해 발생하는 것으로 보고되고 있다. 전위가 없거나 경미한 경우 도수적 정복술 혹은 도수적 정복술 후 경피적 핀고정술을 시행하며, 전위가 심한 골절이거나 도수적 정복술이 불가능한 경우 관혈적 정복술 후 핀고정술을 시행하는 것으로 알려져 있다. 저자들은 전위된 상완골 원위부 과간 골절 환아 2예에서 각각 도수적 정복술과 관혈적 정복술 후 K 강선 고정술을 시행하여 만족한 결과를 얻었기에 보고하는 바이다. Intercondylar fractures of the distal humerus are very rare in children. The pattern of the fracture would suggest that the mechanism of injury involves a fall directly on the flexed elbow. Most agree that the undisplaced fracture can be managed conservatively. With increasing displacement and comminution, the opinions tend to differ. We suggest that closed reduction with percutaneous K wire pinning and open reduction with percutaneous K wire pinning offer a satisfactory methods by which to treat displaced intercondylar fracture in children.

당뇨병 환자의 안면부 파라핀 주사부위에 발생한 피부 모균병

김종현,황소민,전재용,배용찬 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

Mucormycosis is an opportunistic fungal infection caused by the mucorales, which consist of the Rhizophus, Absidia, Mortierella, and Mucor. The diverse clinical forms of mucormycosis can be categorized as rhinocerebral, pulmonary, disseminated, gastrointestinal, cutaneous and miscellaneous. Although it can cause disease in healthy people, it most commonly affects patients who are diabetic or immunosup-pressed. Rarely, mucormycosis develops confined to the subcutaneous tissue. We experienced a case of cutaneous mucormycosis developed in a well-controlled diabetic patient who had previously injected foreign material on her face for an aesthetic purpose at the behest of an unlicensed physician. The patient had tissue necrosis and purulent discharge on her left cheek. Following histologic examination, we diagnosed the condition as cutaneous mucormycosis and treated it by wide excision combined with amphotericin B therapy. The disease was cured without any significant sequelae within 6 months of follow up. Cutaneous mucormycosis is rarely reported but it can cause facial deformity due to tissue necrosis, so that early diagnosis and appropriate treatment are important. Currently, foreign material injection for aesthetic purposes is still performed by unlicensed physicians. We present a case report concluding that one should consider the possibility of fungal infection in skin lesion in diabetic or other immunosup-pressed patients. We also emphasize the seriousness of illegal injection of foreign material.

위장관 출혈을 일으킨 공장의 형활근종 1예

김병수,장성종,부귀범,조운택,박찬국,김만우,변주남,김정용,전호종 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.1

Small bowel leiomyoma is a rare tumor which may occur wherever smooth muscle is present. The small bowel is the most common site and it makes up 20~30% of all benign small intestinal neoplasms. A spectrum of symptoms are common ranging from nausea, vomiting, abdominal pain, to massive intestinal bleeding. Bleeding is the most common symptom and is usually gross and recurrent. Occasionally it may be life threatening. But, the most serious problem is both the absence of specific clinical symptoms, and the difficulties shown in radiological diagnostics of the small bowel. If conventional diagnostic methods fail to reveal any positive findings for gastrointestinal bleeding, the diagnosis of intestinal leiomyoma should be suspected and an SMA angiography shoud be performed. The angiographic criteria of small bowel leiomyoma is very characteristic. We present a case of leiomyoma with considerable and prolonged gastrointestinal bleeding, which was diagnosed by angiography. A 61-year old woman was admitted with a history of melena over the last 10 days. An SMA angiography showed a hypervascular mass with a diameter of 3×3cm. A segmental resection was performed under the impression of the gastrointestinal bleeding due to leiomyoma of the small bowel. Microscopic examination of the lesion shows interlacing or whorl bundles of spindle shaped ces and no mitosis.