• Proceedings of the KSR Conference
• /
• 2007.05a
• /
• pp.1770-1773
• /
• 2007

Fire accident in tunnel is one of the most critical railway accidents, together with overturning of train by derailment and train crash. Tunnel structures contribute to minimize the cost and time of transport, but in case of railway fire accident occurring bring serious damages of human life caused by narrowness of shelter, poisonous smoke and high temperature raised at the inside of tunnel. For that reason, at the beginning of plan of tunnel, the optimum design for rescue of passengers is needed. For the detail and most suitable design for rescue of passengers, many tunnel designer substituted simulation program for mock examination by its high cost and effort. In this study, simulation program techniques, such as Fluent and Simulex, are applied for verifying the rescue design of passengers reduced the risk when fire accident occurred at tunnel utilizing of case study for planned railway tunnels shows 1,245m length in Iksan-Sili area.

• Proceedings of the KSR Conference
• /
• 2007.05a
• /
• pp.1080-1084
• /
• 2007

Recently, as demands of new railway and the relocation of existing line, a number of tunnel structures have been constructed. Tunnel structures contribute to minimize the cost and time of transport, but in case of railway fire accident bring serious damages of human life caused by narrowness of shelter, smoke and high temperature, difficulty in rescue. For that reason, at the beginning of plan of tunnel, the optimum design of safety facility in tunnel for minimizing the risks and satisfying the safety standard is needed. In this study, QRA(Quantitative Risk Analysis) technique is applied to design of railway tunnel for assuring the safety function and estimating the risk of safety. The case study is carried out to verify the QRA technique for railway tunnels in Iksan-Sili.

• Journal of Chest Surgery
• /
• v.37 no.10
• /
• pp.880-883
• /
• 2004

The graft infection within the abdomen is a notorious condition, which usually develops serious complications of anastomotic rupture or distal embolism that ended in death. There has been many controversies in the treatment of an aortobiiliac graft infection and varying results have been reported. The authors treated a case of aortobiiliac graft infection after abdominal aortic aneurysm surgery. The operation was performed with re-aortobiiliac bypass using bilateral superficial femoral veins. The result was successful.

• Journal of the Korean Society of Safety
• /
• v.24 no.3
• /
• pp.88-95
• /
• 2009

Most of subway stations are located underground and the number of passengers is far more than that of designed value, therefore the risk of accident is growing bigger and serious damage is expected in case of disaster. In Korea the period of evacuation study is short and numerical and experimental data of evacuation phenomena in subway station is rare. Many egress evaluation depend on foreign commercial S/Ws which are not yet proven its availability in special case such as subway station. In this paper outflow coefficients which are essential in egress evaluation are calculated at train door, stairway and turnstile at 3 most crowed subway stations. This numerical data can be used in prediction of egress evaluation and the result of other prediction methods can be verified with these experimental data.

• Investigative Magnetic Resonance Imaging
• /
• v.21 no.1
• /
• pp.61-64
• /
• 2017

A characteristic imaging finding in cases of methanol intoxication is putaminal necrosis, but its presence is usually not suspected due to its rarity. Methanol intoxication generally produces serious neurological symptoms that include visual disturbances and diminished consciousness, characteristically with metabolic acidosis. We reported the case of a 59-year-old man who was admitted to the hospital with diminished consciousness. Acute methanol intoxication was determined as the cause. Laboratory tests revealed high anion gap metabolic acidosis. Diffusion-weighted MRI indicated diffuse symmetric diffusion restriction lesions in the subcortical white matter of both cerebral hemispheres.

• Proceedings of the KSME Conference
• /
• 2008.11a
• /
• pp.1289-1294
• /
• 2008

Electrostatic discharge(ESD) phenomenon is a serious reliability concern. It causes approximately most of all field failures of IC. To quality the ESD immunity of IC product, there are some test methods and standards developed. ESD events have been classified into 3 models, which are HBM, MM and CDM. All the test methods are designed to evaluate the ESD immunity of IC products. This study provides an overview among ESD test methods on ICs and an efficient ESD stress method. We have estimated on all pin combination about the positive and negative ESD stress. We make out the weakest stress mode. This mode called a worst-case mode. We proposed that positive supply voltage pin and I/O pin combination is efficient because it is a worst-case mode.

• Journal of Oral Medicine and Pain
• /
• v.9 no.1
• /
• pp.29-33
• /
• 1984

Dental mercury was injected accidentally to left upper buccal mucosa of a 16-year-old girl by charlatan in order to anesthetize a tooth for extraction; thereafter,injected elemental mercury was almost removed by drug adimnistration and surgical operations.One year have passed, still, there are many scaffered small radiopaque white globular cimages in dental, maxillo-facial, and chest radiographs. Redish swollen gingiva and mobility of left upper central incisor which is adjacent to mercury injection site are oral manifestations in this mercury poisoning case. Recently, the patient complains of metallic taste, gastric discomfort and abdominal pain which are thought to be symptoms of mercury poisoning, but there seems to be no serious sequelae now.

• The Korean Journal of Pain
• /
• v.9 no.1
• /
• pp.191-194
• /
• 1996

Headache is one of the most frequent discomforts in human. Its significance is often abstruse, as it may signal serious disease or represent only tension, fatigue, or a migrainous disorder. The International Headache Society(HIS) has developed a new classification and definition system of headache. Retropharyngeal tendinitis is an accepted cause of headache in the list of HIS classification. We experienced an reported a case of retropharyngeal abscess with severe occipital headache.

• Journal of Trauma and Injury
• /
• v.22 no.1
• /
• pp.116-118
• /
• 2009

Pericardial rupture due to blunt trauma is very rare, but can lead to serious complications. It occurs mainly on the left, is found incidentally during surgery, and is seldom discovered radiologically unless accompanied by cardiac herniation. The following case describes a 53-year-old traffic-accident victim who received emergency pericardial repair and bleeding control via an exploratory thoracotomy and an exploratory laparatomy. The patient was discharged without any complication and remained healthy at six month after injury.

• Journal of Chest Surgery
• /
• v.36 no.1
• /
• pp.26-29
• /
• 2003

Aorto-gastric fistulas are relatively rare. Fistula formation between the aorta and the gartrointestinal tract is a serious condition that results in severe hemorrhage with a very high mortality rate, We present an unusual case of successful surgical treatment in Chonnam national university hospital ; of a patient with a aortogastric fistula into thoracoabdominal aortic aneurysm.