• Journal of Chest Surgery
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• 제46권3호
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• pp.226-229
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• 2013

Prolonged air leakage is a major cause of morbidity in pneumothorax. When conservative management is not effective, surgery should be performed. However, surgery is not appropriate in patients with low pulmonary function. In these patients, occlusion of the airway with endobronchial blockers may be attempted under bronchoscopy. We treated two patients with prolonged air leakage using endobronchial Watanabe spigots under fibrobronchoscopy.

• 한국환경보건학회지
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• 제32권5호
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• pp.418-423
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• 2006

이 사례연구는 누수가 있었던 고층 아파트의 공기중 진균 오염 실태를 조사하고, 이를 개선하기 위해 취해진 복원방법의 효과를 평가하기 위해 실시하였다. 공기중 진균은 주로 엔더슨 샘플러를 사용하여 측정하였다. 누수가 있었던 아파트의 복원 전 공기중 진균 농도는 매우 높았다(평균: $51,000\;cfu/m^{3}$, 기하평균: $40,163\;cfu/m^{3}$). 고농도의 오존처리와 오염된 벽체 철거 후 공기중 진균 농도는 상대적으로 매우 낮아졌으며(평균: $1,118\;cfu/m^{3}$, 기하평균: $899\;cfu/m^{3}$), 제거효율은 96.3%로 나타났다. 철거되지 않고 남아 있던 인근 벽체의 벽지를 제거하고 살진균제 처리를 실시한 결과, 공기중 진균 농도는 상대적으로 안전한 수준까지 낮아졌으며(평균: $95\;cfu/m^{3}$, 기하평균: $88\;cfu/m^{3}$), 제거효율은 99.7 %로, 나타났다. 결론적으로, 누수가 있었던 아파트의 공기중 진균 농도는 매우 높은 상태로 오염이 심한 상태이었으나, 본 연구에서 적용한 복원방법들은 공기중 진균 농도 저감에 있어서 매우 높은 효율을 나타냈다.

• Journal of Korean Neurosurgical Society
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• 제47권6호
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• pp.477-479
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• 2010

A case of delayed progressive extradural pneumatocele after microvascular decompression (MVD) is presented. A 60-year-old male underwent MVD for hemifacial spasm; the mastoid air cell was opened and sealed with bone wax during surgery. One month after surgery, the patient complained of tinnitus, and progressive extradural pneumatoceles without cerebrospinal fluid (CSF) leakage was observed. Revision surgery was performed and the opened mastoid air cell was completely sealed with muscle patch and glue. The patient's symptoms were resolved, with no recurrence of pneumatoceles at 6 month follow up. Progressive extradural pneumatocele without CSF leakage after posterior fossa surgery is a very rare complication. Previous reports and surgical management of this rare complication are discussed.

• 대한의용생체공학회:의공학회지
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• 제12권4호
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• pp.295-302
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• 1991

In this paper, the inter- and intra-frame distortions in the gray levels of a series of fluorescein ocular fundus photographs are corrected. For doing this, the background images are extracted from original images using the image blurring effect by decimation, and then shading corrected images are obtained by subtracting the background images from the original images pixel by pixel. In a series of fluorescein ocular fundus photographs, after the gray scale distoriton is corrected, the intensity volumes of dye leakage are measured and represented by a graph. These data may be useful for the prediction of prognosis and the therapeutic management.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2011년도 추계학술논문발표회 논문집
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• pp.310-313
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• 2011

국내에서 고층건물의 제연시스템으로 급기가압 제연시스템이 일반적으로 사용되고 있는데, 기존의 급기가압 제연시스템의 설계방안과 같이 한개의 급기풍도를 통해 누설량과 보충량이 동시에 공급될 경우에는 부속실과 옥내간에 형성되는 차압이 설계기준에 미달하거나 과압이 될 가능성이 매우 높아져서 급기가압 제연시스템의 설치목적을 달성하지 못할 수 있다. 이에 대한 개선방안으로 본 연구에서는 누설량의 공급과 보충량의 공급을 각기 다른 유로를 통해 수행하는 방안 및 장치구성을 제시함으로서 고층건물에서 화재 발생시 안전한 피난환경을 제공하고자 한다.

• Corrosion Science and Technology
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• 제4권1호
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• pp.29-32
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• 2005

A various structural materials are used in construction projects such as a stone, concrete, steel materials. Between of them, concrete are used widely. The compressive strength of concrete is high, and its maintenance and management is comparatively easy. The R.C Building will be superannuated as time passes. This program is generated by propagation of cracks. In order to manage such cracks, time and efforts, expense, etc. are required. In this study, glass sensors were embedding in a model beam and column and leakage of fluorescence and adhesive material was investigated. Further, currents in glass pipe were observed to find the leakage of liquid in glass pipes. Progressive cracks generated by cause the fracture of glass pipes. Therefore, the liquid become to flow and electric current stops, and the cracked part of the member can be found easily. Moreover, the adhesive delays progressive cracking system that responds in air, and the life of a structure can be made to extend. The purpose of this research is to develop of low price sensors that can perform of self-diagnosis in addition to ability of concrete repair concrete to damage.

• 한국안전학회지
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• 제31권3호
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• pp.162-167
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• 2016

As the simple empirical and phenomenological model applied to the analysis of leakage and explosion of chemical substances does not regard numerous variables, such as positional density of installations and equipment, turbulence, atmospheric conditions, obstacles, and wind effects, there is a significant gap between actual accident consequence and computation. Therefore, the risk management of a chemical plant based on such a computation surely has low reliability. Since a process plant is required to have outcomes more similar to the actual outcomes to secure highly reliable safety, this study was designed to apply the CFD (computational fluid dynamics) simulation technique to analyze a virtual prediction under numerous variables of leakages and explosions very similarly to reality, in order to review the computation technique of the practical safety distance at a process plant.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 전력전자학술대회 논문집
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• pp.5-6
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• 2014

According to 2013 fire statistical yearbook in the National Emergency Management Agency, the main cause of an electrical fire are classified to short circuit fault, overload fault, electric leakage, partial disconnection, and joint/contact badness. The occurrence factor of fire is electric arc or spark accompanied with electrical faults. Residual Current Protective Devices(RCDs) of high sensitivity type used at single phase (220V) cut off earth leakage and overload but the RCDs can not cut off electric arc or spark to be a main cause of electrical fire. To be improved on such problem, this thesis is proposed to a auxiliary control device for RCD cut off electric arc or spark.

• Journal of Chest Surgery
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• 제21권4호
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• pp.706-710
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• 1988

Intravascular hemolysis occurs in the majority of patient with mechanical valve prosthesis. The primary cause is mechanical trauma to red cells from turbulent blood flow through the prosthesis. Degree of hemolysis is dependent upon the type, size and material of valve and aggravated by paravalvular leakage. Clinically important hemolytic anemia is required medical management or consideration of reoperation. In severe hemolysis, reoperation is recommended without delay when seems to be renal failure. In this case, postoperative severe mechanical hemolysis was developed immediately after aortic valve replacement with St. Jude medical valve in a 13 year-old male patient. Neither significant paravalvular leakage nor valvular dysfunction was found through redo, but the mechanical valve was strongly suspected the cause of severe hemolysis. The St. Jude Medical valve was changed with Ionescu-Shiley bioprosthesis and any significant clinical problems were not noted through the postoperative course.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 추계 학술논문 발표대회
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• pp.96-97
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• 2019

According to building law, there are only regulations on the fire prevention compartments that can perform the function of partial smoke compartment, but the building law management of the smoke compartment for effective smoke diffusion prevention and control is not possible. The lack of control on the smoke compartment such as leakage rate on the penetrating part, and the lack of leakage rate in the design of smoke control of fire safety law resulted in the absence of fundamental safety technology. Therefore, this study seeks to find solutions to domestic problems after reviewing relevant domestic laws and regulations.