• 한국안전학회지
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• 제24권3호
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• pp.1-6
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• 2009

Recently power plants and oil refineries are focusing on capacity enlargement for better efficiency through higher temperature and higher pressure. Thickness of boiler tubes becomes lessened due to oxidation and erasion caused by high temperature bums gas flowing over tubes outside. Accordingly, mechanical stress of tubes is increasing and that is a critical factor to make a crack and fracture. To prevent those sorts of accidents, aging assessment for proper periodic repair and replacement should be conducted reliably and reasonably. We performed IIT test on Cr-Mo steel, one of the most heat-resistant materials for facilities in power plants, and we report the test result and the considerable effectiveness of IIT test.

• Structural Engineering and Mechanics
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• 제64권3호
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• pp.323-328
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• 2017

This paper presents a three-dimensional finite element method analysis of repairing plate with bonded composite patch subjected to tensile load. The effect of the corrosion on the damage of the adhesive (FM73) in the length of two horizontal cracks on the both sides is presented. The obtained results show that the crack on the left side creates a very extensive area of the damaged zone and gives values of the stress intensity factor (SIF) higher than that on the right side. We can conclude that the left crack is more harmful (dangerous) than that on the right side.

• 한국임상수의학회:학술대회논문집
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• 한국임상수의학회 2007년도 추계국제학술대회 및 컨퍼런스
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• pp.571-571
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• 2007

• Journal of Chest Surgery
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• 제13권1호
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• pp.72-76
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• 1980

A successful repair of transected descending thoracic aorta was performed in a 44-year-old man. The patient had once been hospitalized in a local clinic for 7 days after a steering wheel injury. Dealing with right Colle`s fracture, he was transferred to this hospital to rule out aortic injury. On admission, a chest PA film and concomitant aortogram revealed an aneurysm of the descending thoracic aorta just distal to the origin of the left subclavian artery measuring 6 cm in diameter and 8 cm in length. He underwent urgent thoracotomy and the injured part of the aorta was replaced with a woven Dacron graft utilizing a Gott`s heparinized aortic shunt. The postoperative course was very smooth except hoarseness and left phrenic nerve palsy due to a blind clamping of the proximal aorta during the operation.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1997년도 가을 학술발표회 논문집
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• pp.50-54
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• 1997

To trace crack propagation process in cracked structure is very important thing in view of maintenance and repair of the structure. But it is a little troublesome work due to the continuous remesh work, because a new crack tip is formed in each propagation step. It is more difficult if it should be studied in the three dimensional region. By the way, lately the CFG(Cornell Fracture Group) makes the crack propagation analysis in three dimensional problems possible by developing a new code for them. The use of the code will be expected to spread widely. So a brief introduction of the contents of the code via the theorems used and numerical examples is the purpose of this paper.

• 한국임상수의학회지
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• 제20권1호
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• pp.138-141
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• 2003

First case, a one-year-old female Shih Tzu weighing 3 kg with closed transverse fractures of bilateral mandibular body between 2nd and 3rd premolar teeth were treated surgically with bone plates and screws, and cranial luxation of temporomandibular joints were reduced to closed method. Second case, a 8.4 years old male Yorkshire terrier weighing 2.6 kg with closed transverse/oblique fractures of bilateral mandibular body between premolar and molar teeth were treated surgically with bone plates and screws. Radiographic examination revealed that the fractures in two cases fixed well and temporomandibular joint was stabilized. One month after operation, jaw activity was excellent and malocclusion wasn't observed.

• Nuclear Engineering and Technology
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• 제34권2호
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• pp.105-116
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• 2002

In special industrial fields such 3s nuclear power plants and chemical plants, it is often necessary to repair system components without plant shutdown or drainage of system having many piping structures which may have hazardous or expensive fluid. A temporary ice plugging method for blocking internal flow is considered as a useful method in that case. According to the pipe freezing guideline of the nuclear power plant, the length of a freezing jacket must be longer than twice of the pipe diameter. However, for applying the ice plugging to short pipes which do not have enough freezing length because of geometrical configuration, it is inevitable to use shorter jacket less than twice of the pipe diameter. In this study, the integrity evaluation for short pipes in the nuclear power plant Is conducted by an experiment and the finite element analysis. From the results, the ice plugging process in short pipes can be safely carried out without any plastic deformation and fracture.

• Journal of Trauma and Injury
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• 제34권3호
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• pp.183-186
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• 2021

Cardiac tamponade is an acute life-threatening condition that predominantly involves the intra-pericardial space; however, an expanding mediastinal hematoma can also sometimes cause cardiac tamponade. Here we describe the case of a 45-year-old male driver in whom a traffic accident resulted in rupture of the left internal thoracic artery (ITA), extra-pericardial hematoma, and sternal fracture. After resuscitation, he was scheduled to undergo angio-embolization to repair the ruptured left ITA, but he suddenly developed cardiac tamponade that required a decompressive sternotomy. Nevertheless, the patient had an uncomplicated recovery, and this case suggests that extra-pericardial cardiac tamponade should be considered as a possible consequence of retro-sternal hematoma due to traumatic ITA rupture.

• 한국임상수의학회지
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• 제35권6호
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• pp.269-272
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• 2018

A 4-year-old, 6.1 kg intact female dachshund was referred to the Animal Medical Center with acute right hind limb lameness. Radiographs revealed fractures of iliac body and tibia in the right limb. In addition, the dog exhibited tricuspid valve regurgitation and moderate heartworm infection in the right ventricle and main pulmonary artery on echocardiogram. To obtain stable anesthetic conditions for operation, an adult heartworm removal procedure was previously followed by repair of the complex fractures. All surgical procedures were done without complication and with stable patient conditions. At a one month postoperative follow-up, the dog was doing well with normal ambulation and no tricuspid valve regurgitation as well.

• Journal of Chest Surgery
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• 제52권3호
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• pp.162-164
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• 2019

A male patient weighing 2.5 kg was admitted for respiratory difficulty, and a large ventricular septal defect (VSD) was diagnosed. During care, sudden right leg swelling with a femur shaft fracture occurred. The patient's father had a history of recurrent lower extremity fractures; thus, osteogenesis imperfecta was considered. The patient's respiratory difficulty became aggravated, and VSD repair in the neonatal period was therefore performed with gentle sternal traction and great vessel manipulation under total intravenous anesthesia to prevent malignant hyperthermia. The patient was discharged without notable problems, except minor wound dehiscence. Outpatient genetic testing revealed that the patient had a COL1A1/COL1A2 mutation.