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전력용변압기의 자산관리를 위한 고장률 추정기법의 수학적 모델링에 관한 연구
모수용(MOU SHUAILONG),장경욱(Kyung-Wook Jang),백승명(Seung-Myung Baek),손진근(Jin-Geun Shon) 대한전기학회 2017 전기학회논문지 P Vol.66 No.1
This paper describes the modeling of the failure rate estimation technique for applying the asset management technique to electric power facilities. There are many modeling techniques to estimate the failure rate. In this paper, the characteristics of the normal distribution, exponential distribution, weibull distribution, and piecewise linear functions are discussed. When evaluating reliability, the evaluation may be less meaningful if the sample data is insufficient. Therefore, Weibull distribution and piecewise linear function are adopted as the most suitable functions for estimating the failure rate of power facilities and the resulting failure rate function is derived.
Dissecting Aneurysm of the Anterior Cerebral Artery with Spontaneous Subarachnoid Hemorrhage
Lee, Young-Jin,Kim, Young-Gyu,Kim, Dong-Ho,Lee, Mou-Seop The Korean Neurosurgical Society 2007 Journal of Korean neurosurgical society Vol.41 No.2
A 58-year-old woman was admitted to our department due to headache. Brain computed tomography [CT] indicated subarachnoid hemorrhage [SAH], and emergency angiography showed dissecting aneurysm involving the left A1 segment We performed trapping of dissecting A1 aneurysm and the postoperative course was uneventful. We present a case of dissecting aneurysm in the anterior cerebral artery with spontaneous SAH which was treated by early surgery and resulted in clinically good prognosis.
Efficacy and Rebleeding Risk of Preoperative Ventriculostomyin Aneurysmal Subarachnoid Hemorrhage
Lee, Young-Jin,Min, Kyung-Soo,Lee, Mou-Seop,Kim, Dong-Ho,Kim, Young-Gyu The Korean Neurosurgical Society 2007 Journal of Korean neurosurgical society Vol.41 No.2
Objective : Despite the widespread use of preoperative ventriculostomy in aneurysmal subarachnoid hemorrhage [SAH], there is no general consensus regarding the risk of bleeding associated with its use before aneurysm repair. This study was conducted to define the efficacy and rebleeding risk of ventriculostomy in aneurysmal SAH. Methods : The authors reviewed 339 consecutive patients with aneurysmal SAH who were treated at our hospital between January 1998 and December 2004. Results : Preoperative ventriculostomy was performed on 73 patients for acute hydrocephalus after aneurysmal SAH. The Hunt-Hess[H-H] grades of patients who underwent ventriculostomy were higher. Out of the 73 patients who underwent preoperative ventriculostomy, 58 [79%] demonstrated immediate clinical improvement after ventriculostomy. Of those same 73 patients 22 [30%] suffered aneurysmal rebleeding, whereas only 11 [4%] of the 266 patients who did not undergo ventriculostomy showed preoperative aneurysm rebleeding. The causes of rebleeding in the 22 patients who underwent ventriculostomy before surgery were related to the ventriculostomy procedure itself, subsequent cerebrospinal fluid [CSF] drainage, angiography and patient care procedures, such as endotracheal suction and nursing care. The mean time interval between SAH and surgery in the patients who underwent ventriculostomy was not statistically different from those who did not receive preoperative ventriculostomies [44.66 compared with 42.13 hours; p=0.73]. Conclusion : The preoperative ventriculostomy improved patients' clinical condition but increased the risk of rebleeding after aneurysmal SAH. When necessary, however, rapid change in transmural pressure during ventriculostomy must be avoided, careful management during ventricular drainage is needed, and surgery should be performed as soon as possible to prevent or reduce the incidence of rebleeding.
( Su Young Yoon ),( Junepill Seok ),( Yook Kim ),( Jin Suk Lee ),( Jin Young Lee ),( Mou Seop Lee ),( Hong Rye Kim ) 대한외상학회 2023 大韓外傷學會誌 Vol.36 No.4
Supratentorial and infratentorial epidural hematoma (SIEDH) is a rare but life-threatening complication following traumatic brain injury. However, the literature on SIEDH is sparse, consisting only of a few small series. Prompt diagnosis and the application of appropriate surgical techniques are crucial for the rapid and safe management of SIEDH. Herein, we present three cases of SIEDH treated at our institution, employing a range of surgical approaches.
Zhang, Yu-Qin,Lee, Jae-Chan,Park, Dong-Jin,Lu, Xin-Xin,Mou, Xiao-Zhen,Kim, Chang-Jin International Union of Microbiological Societies 2014 International journal of systematic and evolutiona Vol.64 No.5
<P>A pink, Gram-stain-negative, motile, halotolerant bacterium with subpolar flagellum, designated strain BH87090<SUP>T</SUP>, was isolated from a saline soil sample collected from the south-west coastal area of South Korea (125° 58′ 58.08″ E 34° 45′ 37.32″ N). The isolate formed opaque pink to red colonies on marine agar plates at 30 °C. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, sulfoquinovosyl diacylglycerol, phosphatidylcholine and one unidentified phospholipid. The sole respiratory quinone was ubiquinone-10 (Q-10). The major cellular fatty acids were C<SUB>18 : 1</SUB>ω7<I>c</I>, C<SUB>19 : 0</SUB> cyclo ω8<I>c</I>, C<SUB>16 : 0</SUB> and 11-methyl C<SUB>18 : 1</SUB>ω7<I>c</I>. The genomic DNA G+C content was 61.8 mol%. These chemotaxonomic characteristics were all consistent with specific properties of the genus <I>Roseivivax</I>. Phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate affiliated to the cluster with members of the genus <I>Roseivivax</I> in the <I>Roseobacter</I> clade, which suggested that the strain belonged to the genus <I>Roseivivax</I>. However, the low 16S rRNA gene similarities (93.5–95.3 %) of strain BH87090<SUP>T</SUP> with all the members of the genus <I>Roseivivax</I> indicated that it represented a novel species of the genus <I>Roseivivax</I>. On the basis of phenotypic and genotypic data, strain BH87090<SUP>T</SUP> should be classified as a novel species of the genus <I>Roseivivax</I>. The name <I>Roseivivax roseus</I> sp. nov. is proposed, with strain BH87090<SUP>T</SUP> ( = DSM 23042<SUP>T</SUP> = KCTC 22650<SUP>T</SUP>) as the type strain.</P>