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강성구,심지성,Fikret Onol,K. R. Seetharam Bhat,Vipul R. Patel 대한비뇨의학회 2020 Investigative and Clinical Urology Vol.61 No.1
Robotic radical prostatectomy (RARP) is a standardized treatment for localized prostate cancer, which provides better functional outcomes and similar oncological outcomes compared to open approaches. Here, we share our experience of 12,000 RARPs by describing the outcomes of the procedure in terms of positive surgical margin (PSM), continence, and potency as well as by presenting our detailed surgical technique with recent modifications. On cancer control, the PSM rates were 5.8% and 26.1% in T2 and T3, respectively. On the premise of not compromising oncologic outcomes, a tailored approach to individual patients is essential. Even if an extracapsular extension is suspected, neurovascular bundle (NVB) tailoring can be applied using an anatomical landmark to preserve maximal nerve tissue with a negative margin. We developed a nomogram as a useful tool for deciding the degree of tailoring. For improvements of functional outcomes, we used athermal retrograde early release with a toggling technique, wherein the nerve dissection from the bottom helps with blood loss and allows for smooth NVB releasing. Additionally, we recently performed a new minimal apical dissection/lateral prostatic fascia preservation technique. As a result, our 1-week continence rate was 37% and the 6-week rate was 77.6%. In addition, the potency rates in our study were 69%, 82%, and 92% at 3 months, 6 months, and 1 year, respectively (preoperative Sexual Health Inventory for Men scores >21 & bilateral full nerve spared).
릴레이 직/병렬 연결에 의한 절연형 가변 충전기 병렬운전
강성구,김승애,이승열,박성준 대한전기학회 2012 대한전기학회 학술대회 논문집 Vol.2012 No.4
본 논문에서는 배터리의 다양한 용량 및 전압 사양을 만족시킬 수 있는 배터리 충전기의 개발을 목적으로 한다. 이를 위해 3상 AC전원을 입력받아 정류기를 거친 DC전압을 Buck converter를 통해 출력을 제어하고, L-C 직렬공진 형태의 트랜스를 통한 6채널의 출력을 릴레이의 직/병렬 연결에 의해 가변적인 배터리 충전이 가능하게 하였다. 또한 각 충전장치의 병렬운전을 위해 Master가 되는 장치의 출력에 따라 Slave가 되는 장치가 동일한 출력을 추종하여 병렬운전을 가능하게 하였다. 이와같은 구조의 검증 및 타당성을 확인하기 위하여 13.5㎾급의 단위 충전장치 병렬운전 시뮬레이션을 수행하였다.
BOSCH 솔레노이드 방식의 Grade 인젝터와 IQA 인젝터 불량이 연료 분사량제어에 미치는 영향에 관한 실험적 연구
강성구,김철수 한국기계기술학회 2018 한국기계기술학회지 Vol.20 No.3
In this paper, 'Pico scope' was used to measure and analyze high voltage waveforms of 'Grade injector' and 'IQA injector' due to defective solenoid injector of CRDI diesel engine, and the following conclusions were obtained. In the case of the injector of 'Grade Injector' and 'IQA Injector', there was no change in the injection timing of the injector while the injector was installed. However, by controlling the operation time, It is judged that the injector control is insufficiently controlled when the number of revolutions of the engine is increased to 2000 rpm and 3000 rpm in the idling state in the idling state because the injector failure is precisely controlled in the idling state, When determining the fault injector, the waveform of the 'Grade injector' and 'IQA injector' can be detected by waveform analysis by comparing the injection control time by measuring the high voltage waveform of the injector control in idle idling state. Can be easily diagnosed and maintained. I hope this study will be handed to the mechanics to make diagnosis of CRDI injector convenient.
실리카-알루미나 觸媒에 依한 Thiophene의 水素化 接觸分解에 關한 硏究
姜聖求 영남이공대학 1978 論文集 Vol.7 No.-
The hydrodesulfurization of thiophene over catalysts was studied by the use of pulse reactor. The catalysts used were lladong kaolines exchanged into nickel and cobalt ion, and treated with alkali. The catalytic activity was best with cobalt ion exchanged Hadong kaoline and the convasion rate of hydrodesulfurization was 64% at the flow rate of 30 ml/min of hydrogen gas at 500? over cobalt ion exchanged Hadong kaoline.
강성구,양종수,김호경 대한조선학회 2015 International Journal of Naval Architecture and Oc Vol.7 No.2
The weld scallop has been used for joining T-bars. There are a lot of weld scallops in shipbuilding. It is difficult to perform scallop welding due to the inconvenient welding position. This results in many problems such as porosity, slag inclusion, etc. In this study, a new method is devised to remove weld scallops by incorporating a Ceramic Backing Material (CBM). The weld scallop is removed by an elongation of the v groove. In order to insert a CBM into the groove without a weld scallop, a wedge-shaped CBM is developed. The top side of the developed CBM is similar to the shape of a general back bead. The bottom surface has a saw-toothed shape for cutting at a suitable length. This can be attached to the root side of a face plate using adhesive tape, just like a general CBM. Welding experiments in normal and abnormal conditions are carried out and the possibility of burn-through is examined. This CBM's applicability to shipbuilding is verified.