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Shin, Jung-Hoon,Jung, Na-Young,Kim, Sang-Pyo,Son, Eun-Ik The Korean Neurosurgical Society 2014 Journal of Korean neurosurgical society Vol.56 No.3
Objective : Cortical dysplasia (CD) is one of the common causes of epilepsy surgery. However, surgical outcome still remains poor, especially with frontal lobe epilepsy (FLE), despite the advancement of neuroimaging techniques and expansion of surgical indications. The aim of this study was to focus on surgical strategies in terms of extent of resection to improve surgical outcome in the cases of FLE with CD. Methods : A total of 11 patients of FLE were selected among 67 patients who were proven pathologically as CD, out of a total of 726 epilepsy surgery series since 1992. This study categorized surgical groups into three according to the extent of resection : 1) focal corticectomy, 2) regional corticectomy, and 3) partial functional lobectomy, based on the preoperative evaluation, in particular, ictal scalp EEG onset and/or intracranial recordings, and the lesions in high-resolution MRI. Surgical outcome was assessed following Engel's classification system. Results : Focal corticectomy was performed in 5 patients and regional corticectomy in another set of 5 patients. Only 1 patient underwent partial functional lobectomy. Types I and II CD were detected with the same frequency (45.45% each) and postoperative outcome was fully satisfactory (91%). Conclusion : The strategy of epilepsy surgery is to focus on the different characteristics of each individual, considering the extent of real resection, which is based on the focal ictal onset consistent with neuroimaging, especially in the practical point of view of neurosurgery.
기술사례 : 전자뇌관을 이용한 터널발파의 근거리 지반진동 특성
김용표 ( Yong Pyo Kim ),김갑수 ( Gab Soo Kim ),손영복 ( Young Bok Son ),김재훈 ( Jae Hoon Kim ),김희도 ( Hee Do Kim ),이준원 ( Jun Won Lee ) 대한화약발파공학회 2013 화약발파 Vol.31 No.1
전자뇌관을 사용하여 근접 보안물건에 대한 터널발파 진동제어를 위해서는 근거리 발파진동 특성에 대한 이해가 필요하다. 본 논문에서는 터널발파 진동의 결정에 있어서, 심 발부와 확대부의 영향을 분석하였다. 분석을 위한 계측자료는 “원주~강릉 복선전철 제OO공구 노반건설공사” OOO 터널 현장의 기존 도로 하부통과 구간에서 획득하였다. 이에, 0.01%의 높은 시차 정밀도를 가진 터널용 전자발파시스템을 활용하여, 최 대지발당 장약 량을 정밀하게 유지함으로써 뇌관 오차에 의한 진동 증폭현상을 제거하고, 진동제어에 유리한 심 빼기 발파 방법으로 번 컷(Burn-Cut)을 채택하였다. 그 결과, 심 발부의 진동수준이 가장 높다는 일반적인 발파 상식과 달리 확대부의 진동수준이 상대적으로 더욱 높은 것으로 나타났다. 결과적으로, 근접 거리의 터널 발파진동은 전자뇌 관을 심 발부에 적용 함으로서 저감시킬 수 있으며, 전체 영역에 전자뇌관을 사용할 경우 더욱 효과적으로 발 파진 동을 감소시킬 수 있을 것으로 판단된다. In order to control tunnel blast vibration for adjacent facilities using electronic detonator, Understanding about the characteristics of near-field ground vibration is necessary. The purpose of this paper is to analyze effects of Cut-area and Extension-area vibration in relation to decision of tunnel blast vibration. These data were obtained at the top monitoring positions while OOO tunnel site of “Wonju~Gangneung double railroad section OO construction” was passing under the existing road. Thus, tunnel blasting was conducted by tunnel electronic blasting system with 0.01% high delay-time accuracy. It can be possible that not only keeping maximum charge per delay-time but also preventing amplification of vibration which is occurred by delay-time scatter using common detonators. Additionally, V-Cut was changed into Burn-Cut. The results was presented that vibration level of extension-holes were higher than Cut-holes. Therefore, near-field ground vibration can be effectively minimized using electronic detonators in the Cut area. And also more effective way to reduce tunnel blast vibration is full-face blast using electronic detonators.
김종훈(Jong Hoon Kim),최익수(Ik Soo Choi),김천환(Cheon Whan Kim),구호성(Ho Seong Ku),손성표(Seong Pyo Son),이광재(Kwang Jaw Lee),정철호(Cheol Ho Jeong),최신영(Shin Young Choi),김인주(In Joo Kim),김용기(Yong Ki Kim),강도영(Do Young Ka 대한내과학회 1996 대한내과학회지 Vol.50 No.4
N/A Objectives: The morbidity and mortality of diabetes mellitus have increased with the improvement of our economy. To these days, there is no report on the cause of death associated with NIDDM in Korea, but it has been generally accepted that infection may be the leading cause of death in NIDDM patients. But recently, with the improvement of infection control technique and the clinical application of new effective antibiotics, it is suspected that the death due to infection is decreasing. And, due to improvement of skill of diabetic control, the life expectancy of the diabetics has been increased. So, we hypothesized that macrovascular diseases complicated with Diabetes Mellitus may play central role in death of diabetics, resembling in developed country. In this study, we try to confirm this hypothesis. Methods: We analysed the cause of death of 149 NIDDM patients on the basis of death certificates from major hospitals in Pusan, Korea. We compared the major cause of death such as cardiovascular disorder and infection with those of general population on the basis of the 1992's statistical mortality analysis. Results: 1) In the decreased 149 Non-insulin dependent diabetics, death from cerebrovascular disease was 24.8% (37/149), infection was 24.2% (36/149), ischemic heart disease was 12.8% (12/149), congestive heart failure was 9.4% (14/149). Death due to diabetic metabolic complications, liver disease, malignant tumor and renal failure were 6.0%, 5.4%, 4.7% and 3.3% respectively. 2) When we compared the major cause of death of non-insulin-dependent diabetic patients with that of general population by observed to expected death ratio(O/E ratio), infection was 7.8, congestive heart failure was 4.1, ischemic heart diease and cerebrovascular disease were 3.3 and 1.4 respectively. 3) When cerebrovascular disease, ischemic heart disease and congestive heart failure were defined together as cardiovascular disorder, O/E ratio was 2.0, and this is lower than that of infection. Conclusion: The large vessel disease is the most common cause of death in patients with non-insulin-dependent diabetes mellitus in Pusan, Korea. So, not only strict glycemic control, but detecting the risk factors related to large vessel disease and its control is important. This type of management may influence the diabetic's life expectancy ultimately, Generally, infection has been thought to be decreasing in recent years but, it is still one of the major cause of death in Korea. We have to detect infection early and treat it actively in non-insulin-dependent diabetic population.
산소분리를 위한 Ba0.5Sr0.5Co0.8Fe0.2O3-δ 관형 분리막 제조 및 투과 특성
김종표 ( Jong Pyo Kim ),손수환 ( Sou Hwan Son ),박정훈 ( Jung Hoon Park ),이용택 ( Yong Taek Lee ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.6
Ba0.5Sr0.5Co0.8Fe0.2O3-δ 조성의 관형 분리막을 압출 성형 방법으로 제조하였다. 압출성형 직후 분리막의 TGA 분석결과 3단계의 무게감소로 첨가제와 탄산염이 분해되었고, 건조 수축율은 68 h 경과 후 변화가 없었으며 외경이 큰 분리막에서 높게 나타났다. 소결 후 분리막의 XRD 및 SEM 분석결과, 분리막은 단일상의 페롭스카이트 구조를 갖는 치밀한 막을 보였고, EDS 분석을 통해 Ba0.5Sr0.5Co0.8Fe0.2O3-δ와 유사한 성분함량을 가짐을 확인하였다. 두께 0.95mm Ba0.5Sr0.5Co0.8Fe0.2O3-δ 관형 분리막의 압환강도(radial crushing strength)는 5.7 kgf/mm2이였으며, 950 ℃에서 산소투과량은 146.85 mL/min(Jo2=2.33 mL/min·cm2)를 나타냈었다. 투과 측의 진공펌프 사용이 쓸개 가스를 활용한 것보다 산소 투과량 증진에 효과가 있음을 알 수 있었다. Tubular Ba0.5Sr0.5Co0.8Fe0.2O3-δ membranes were prepared by extrusion. TGA results of green body membrane after extrusion showed three successive weight losses due to decomposition of organic additives and carbonate. Drying shrinkage rate of tubular Ba0.5Sr0.5Co0.8Fe0.2O3-δ membranes was no change after 68 h and higher in the membrane with large outer diameter. XRD and SEM results showed the sintered membranes were the single phase structure and dense. The stoichiometric molar ratio agreed well with composition ratio calculated by EDS results for Ba0.5Sr0.5Co0.8Fe0.2O3-δ membrane. Radial crushing strength of tubular Ba0.5Sr0.5Co0.8Fe0.2O3-δ membrane with 0.95 mm thickness was 5.7 kgf /mm2 and the oxygen permeation rate of same membrane was 146.85 mL/min (Jo2=2.33 mL/min·cm2) at 950 ℃. Therefore, it was known that use of vacuum pump was more effective than that of sweep gas to obtain higher oxygen permeation flux.
정성훈 ( Sung Hoon Jung ),손은익 ( Eun Ik Son ),김인수 ( In Soo Kim ),김상표 ( Sang Pyo Kim ) 대한뇌종양학회·대한신경종양학회·대한소아뇌종양학회 2005 대한뇌종양학회지 Vol.4 No.2
Symptomatic lateral ventricular subependymomas are rare. A 34-year-old man presented with a 3-year history of progressive headache and seizure. Computed tomography and magnetic resonance imaging demonstrated inhomogenous well-enhancing, mass with calcification and chronic hemorrhagic component. A gross total resecton was performed via inferior temporal approach and the patient did well postoperatively. This report presents an introduction of subependyma and surgical strategy for lateral trigonal tumor.