• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.771-772
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• 2017

내부 정보 유출 사고의 빈도가 높아지게 되면서 이러한 내부 정보 유출을 막기 위해 DLP(Data Loss Prevention), DRM(Digital Rights Management), DB 접근 통제 솔루션, 인터넷 접근 차단 솔루션과 같은 여러 가지 보안 솔루션을 적용하고 있으나, 내부 정보 유출을 시도하는 개인의 행동을 기반으로 개인을 탐지한다는 문제점을 가지고 있다. 본 논문에서는 개인이 아닌 조직으로 이루어진 내부 정보 유출의 행위를 탐지하고 대응하기 위해 보안로그를 위험 사용자들끼리 그룹화 하여 내부 정보 유출 여부를 판단하는 시스템을 제안한다.

• Journal of Chest Surgery
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• v.15 no.3
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• pp.267-273
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• 1982

We have observed 360 cases of spontaneous pneumothorax from Jan. 1971 to Dec. 1981 at the department of Thoracic and Card iovascular Surgery, Yonsei University College of Medicine. The patients age ranged from 2 days to 95 year-old. The associated pulmonary lesions were shown pulmonary tuberculosis in 158 cases[43.9%], bullae in 35, pulmonary emphysema In 32, pneumothorax in 10, paragonimiasis In 7 and unknown underlying pathology in 109 patients. 70 [51.1 %] out of 1 37 cases who received conservative medical treatment Including thoracentesis were cured completely, but the 67 cases [48.9 %] of remaining uncured patients were treated by surgical procedures. The 290 patients who received surgical management were recovered without recurrent pneumothorax. The surgical procedures were closed thoracotomy drainage or explothoracotomy. The choice of treatment should be based on the extent of pneumothorax or the presence of underlying pulmonary disease. Tube thoracotomywas the most effective procedure in achieving the expansion of collapsed lung. On the other hand, open thoracotomy could be a good approach to recurrent pneumothorax, persistent air leakage, incomplete expansion of the lung and bilateral pneumothorax. The minithoracotomy Is the best procedure to recurrent pneumothorax.

• Journal of Korean Neurosurgical Society
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• v.42 no.6
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• pp.492-494
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• 2007

We present a case with seizure, confusion, hypesthesia and paraplegia after intrathecal injection of fluorescein. A 41-year-old man was admitted to our institution for the management of the CSF leakage. Intrathecal injection of fluorescein was performed and he complained of severe pain and numbness in the lower extremities at the end of the injection. Four hours later, he exhibited confusion, paraparesis and two episodes of generalized seizures. Two days later, he showed paraplegia and all sensory modalities below the T12 level were absent. Spine magnetic resonance imaging revealed myelopathic change in the lower thoracic spinal cord. There was no improvement of weakness and sensory deficits in lower extremity even 14 days after fluorescein injection. We speculated that thoracic myelopathy was associated with the intrathecal injection of fluorescein. In spite of its rarity, the complication after intrathecal injection of fluorescein could be serious. Thus, obtaining an informed consent with discussion with patient before the procedure is mandatory.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.3
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• pp.27-32
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• 2010

The inundation of substation and ground power equipment breaks out every summer season in low-lying downtown areas and low-lying shores by torrential rain, typhoons and tsunamis. It has, in turn, caused replacement, social and economic costs for blackouts. For activity management regarding flood damage we produced a flood protection system which using the Pad transformer as a basic frame and is developed using pneumatic pressure. We tested safety concerns including insulation resistance and current leakage first for water tank flooding and, second, by an empirical test through supplying 22.9[kV]. We estimate that costs associated with flooding and power failure can be diminished by these advances toward creating a more reliable system.

• Journal of Chest Surgery
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• v.6 no.1
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• pp.95-100
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• 1973

This is a report on a total of four cases of esophageal perforation due to fish bone in the Department of Thoracic Surgery, Hanyang University Hospital. The perforated portions of esophagus were upper third of esophagus, that is, cervical esophalgus principally. The complications after esophageal perforation were acute mediastinitis with mediastinal emphysema in 2 cases, acute mediastinitis with both pyothorax in one case and cervical subcutaneous abscess alone in one case. Collar mediastinostomy was required to control disturbance of cardiopulmonary function as emergency procedure. Gastrostomy was of worthy for the various purposes, that` is, for feeding, absolute rest of the esophagus, and for prevention against continuous infection from esophageal leakage. After the gastrostomy. 3 cases were healed by spontaneous closure of esophageal perforation between one to four weeks. One case expired from severe septic shock due to acute diffuse mediastinitis and both pyothorax.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.27 no.7
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• pp.829-836
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• 2003

Understanding of heat generation in semiconductor devices is important in the thermal management of integrated circuits and in the analysis of the device physics. Scanning thermal microscope was used to measure the temperature and the electric potential distribution on the cross-section of an operating metal-oxide-semiconductor field-effect transistor (MOSFET). The temperature distributions were measured both in DC and AC modes in order to take account of the leakage current. The measurement results showed that as the drain bias was increased the hot spot moved to the drain. The density of the iso-potential lines near the drain increased with the increase in the drain bias.

• Journal of Yeungnam Medical Science
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• v.21 no.1
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• pp.127-131
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• 2004

A laryngeal mask airway (LMA) has many advantages in the management of airway emergencies or the treatment of patients in whom intubation is difficult, but the use of LMA during positive ventilation may seem inappropriate to protect the airway because of the risk of pulmonary aspiration of regurgitated gastric contents. We experienced aspiration pneumonia after general anesthesia using LMA in patient who suffered from panperitonitis. It is considered that the main reason for aspiration pneumonia was a leakage of gastric content through the space surrounding the nasogastric tube while under high airway inflation pressure. We concluded that when LMA or the Proseal laryngeal mask airway (PLMA) is chosen for the use in difficult intubations, careful patient-suitability selection and the correct knowledge of LMA and PLMA are needed to protect the airway against aspiration.

• Investigative Magnetic Resonance Imaging
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• v.22 no.3
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• pp.182-186
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• 2018

Dynamic enhanced magnetic resonance lymphangiography can be used to provide anatomic and dynamic information for various lymphatic diseases, including thoracic duct injury, and can also help to guide the thoracic duct embolization procedure. We present a case of postoperative chylothorax demonstrated by dynamic enhanced MR lymphangiography. In this case, the chyle leakage site and location of cisterna chyli were clearly visualized by dynamic enhanced MR lymphangiography, thus allowing for management with thoracic duct embolization.

• Journal of Information Technology Services
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• v.7 no.3
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• pp.175-198
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• 2008

The wide spread of the Internet has become a momentum to promote informatization, and thus individuals, organizations, and government bodies are competitively participating in this kind of new wave. Informatization enables us not only to circulate and utilize information without any limitation but also to maximize users' benefits and convenience. On the other hand, it brings about negative effects-security incidents such as cyber terror, Internet fraud and technology leakage, etc. Evaluation on security level should precede over all the others in order to minimize damage by security incidents since it diagnoses current status on security as it is and can be used as a guideline for appropriate security management. In this study, evaluation domains, items and indicators of information security to evaluate information security are theoretically developed on the basis of critically reviewing the major existing research. And then the coincidence level(content validity, ease and reliability of evaluation) of each evaluation indicators are empirically analyzed through performing the field study of 83 information security experts.

• Transactions of the Korean Society of Automotive Engineers
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• v.9 no.6
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• pp.112-118
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• 2001

In this study the leakage current measurement method based on a porous ceramic is applied to check the conductive substance caused by the ionized particles. By using engine and chassis dynamometer and an experiment vehicle, in which the hydrocarbon sensor (HC sensor) was exposed to the exhaust gas to create the electrical signal, the HC sensor in the exhaust line checked the conductive ions in emission gas. Generally the output electrical signal of HC sensor is followed with amount of hydrocarbon in the experiments in cold start and operation. By combining the electrical signal, a measure of conductivity of exhaust gas with hydrocarbon can be provided by OBD (On Board Diagnosis) II and EMS (Engine Management System).