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서병욱 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.1
Objects: Retrospective studies was carried out to evaluate and analysis the complication after hydrocelectomy of children Methods: The 300 cases of hydrocele under 15 years old who underwent hydrocelectomy between January, 1994 and December, 1998 was reviewed. Results: A total of 29(9%) complications were encountered in 28 patients, including controlateral hydrocele(12), wound infection(8), recurred hydrocele(4), scrotal hematoma(3) and iatrogenic ectopic testis(2). The reoperations were performed in 16 cases including controlateral hydrocele(12) and recurred hydrocele(4). Conclusion: Although the rate of complications were low, sometimes the complications result in reoperations of children. Therefore through history taking, physical examination and diagnostic studies should be performed to prevent controlateral hydrocele in postoperative period and meticulous operative techniques including routine testicular palpation for position at the completion of hydrocelectomy should be performed to prevent recurred hydrocele and iatrogenic ectopic testis.
비정상(非正常) 시간을 고려한 조적공정 시뮬레이션 모델
서병욱,이동은 대한건축학회 2017 대한건축학회논문집 Vol.33 No.2
Existing masonry operations models retain several discrepancy. They neither explicitly consider the generation and the consolidation of processing entity, and their generation and consolidation points, nor define the unit(or amount) of processing entity over which tasks pass each other. Handling these issues may contribute defining the start and end points of each task in time, hence measuring more accurately the cycle time for producing a production unit. This study identifies the resource types used for masonry operation, collects the number of each resource and its unit cost, and models the non-stationary time (NST) of a task, time increment, and increment interval. This paper presents a method that encourages the standardization of an operation simulation model and the reusability of it by comparing the operation performances between a simulation model that takes into account NST and another model that dose not. The usability and validity of the model is validated by performing a test case for a real world masonry operation.