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오리피스 형상에 따른 단공 노즐의 내부 가시화와 분무 특성
손종원 ( Jong Won Son ),차건종 ( Keun Jong Cha ),김덕줄 ( Duck Jool Kim ) 한국분무공학회 2002 한국액체미립화학회지 Vol.7 No.1
N/A The objective of this investigation was to obtain an excellent spray at the low injection pressure. When cavitation occurred in the nozzle hole, the atomization of the liquid jet enhanced considerably. In this experiments, a acrylic nozzle which was installed the gap and installed the bypass in the nozzle hole was used to enhance the atomization of the liquid jet at the low injection pressure. The liquid flow in the nozzle hole was photographed by a transmitted light using a micro flash. The spray angle was measured by macroscope images of PMAS and the Sauter mean diameter was measured by PDA system. The pressure of the nozzle hole was measured by pressure trasducer. It was found that enhanced atomization of the liquid jet at the low injection pressure was obtained by installing the gap and the bypass at the single hole nozzle.
증례 : 소화기 ; 내시경점막절제술로 치료한 출혈을 보인 위 융모샘종 1예
손혁수 ( Hyuk Su Son ),김성욱 ( Sung Uk Kim ),손종원 ( Jong Won Sohn ),정인권 ( In Kwon Chung ),전성우 ( Seong Woo Jeon ),정민규 ( Min Kyu Jung ),김성국 ( Sung Kook Kim ) 대한내과학회 2011 대한내과학회지 Vol.80 No.6
위 샘종성 용종은 과형성 용종 다음으로 흔하며 대부분관상샘종이다. 하지만 융모샘종은 결장에서는 흔히 발생하지만 상부위장관에서는 매우 드물게 발생하며, 급성 또는 만성 출혈을 흔히 동반할 수 있으나 국내에서는 아직 보고가 없다. 이번 증례에서는 활동성 출혈을 보이는 위 용종을 내시경 점막절제술로 치료 후 융모샘종으로 확인된 1예를 경험하여 보고하는 바이다. Villous adenomas of the stomach are rare, although they more frequently occur in the colon and rectum. Clinical symptoms are similar to gastric polyps, but acute or chronic bleeding with anemia occurs frequently. The size of tumors varies between 4 and 6 cm, and the malignant potential is greater when the tumor is larger. Complete resection with surgery or endoscopic resection is the treatment of choice. Endoscopic findings revealed a dome-like or pedunculated appearance. Microscopically, the tumor was composed of long fronds and papillations covered by columnar epithelia with a reduced number of goblet cells. We report a case of polyps with chronic intermittent and acute bleeding for 6 months, which was alleviated by endoscopic mucosal resection and was confirmed as a villous adenoma. (Korean J Med 2011;80:703-707)
전산 구조 해석 기반 스마트 신발 청소기 하부의 성능 분석
김서현(Seo-Hyeon Kim),손종원(Jong-Won Son),최영일(Yeongil Choi),이재선(Jaesun Lee) 한국기계가공학회 2023 한국기계가공학회지 Vol.22 No.7
Due to COVID-19, the health of many people is threatened, especially from respiratory illness. Therefore, cleanliness and disinfection have been emphasized, leading to increased popularity of cleaning products. In multi-use facilities, smart shoe sole cleaners are being used to prevent indoor contamination. Personal living spaces have also gained attention, leading to the need for smart shoe sole cleaners for cleanliness and personal hygiene at home. However, for household products, downsizing of existing large products while ensuring suction power, filter performance, and durability is critical. In this study, structural analysis was conducted through load testing of the smart shoe sole cleaner based on the material. Structural analysis was performed to select materials and develop countermeasures to prevent the mat from closing on the floor owing to load changes. The optimal location of the support point and material properties were determined based on deflection, which is expected to contribute to the design and production competitiveness of household shoe sole cleaners.