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Jun Woo Bong,Yeonuk Ju,Jihyun Seo,Jung Ae Lee,Sang Hee Kang,Sun Il Lee,Byung Wook Min 대한외과학회 2021 Annals of Surgical Treatment and Research(ASRT) Vol.100 No.5
Purpose: Neoadjuvant chemoradiotherapy has been accepted as a standard treatment for stage II–III rectal cancer. This study aimed to evaluate the clinical characteristics of patients who underwent neoadjuvant chemoradiotherapy for rectal cancer and effects on overall survival (OS) of neoadjuvant chemoradiotherapy in South Korea. Methods: Patients who underwent curative resection for rectal cancer from 2014 to 2016 were retrospectively reviewed from the database of the National Quality Assessment program in South Korea. Patients were categorized into the upfront surgery group and neoadjuvant chemoradiotherapy group. We evaluated factors associated with the administration of neoadjuvant chemoradiotherapy and its effects on OS. Inverse probability of treatment weighting was performed to account for baseline differences between subgroups. Results: A total of 6,141 patients were categorized into the upfront surgery group (n = 4,237) and neoadjuvant chemoradiotherapy group (n = 1,904). The neoadjuvant chemoradiotherapy was more frequently administered to male, midrectal cancer, and younger patients. In the neoadjuvant chemoradiotherapy group, old age, underweight, and pathologic stage were significant risk factors of OS, and male sex, the level of tumor and clinical stages were not associated with OS. After adjustment, the OS of the neoadjuvant chemoradiotherapy group followed the OS of the upfront surgery group of the same pathologic stage. Conclusion: Male sex and the level of tumor were not related to the OS of rectal cancer patients with neoadjuvant chemoradiotherapy. The OS of patients who underwent neoadjuvant chemoradiotherapy was decided by their pathologic stages regardless of clinical stages.
승용 디젤엔진 소음 기여인자 추출에 관한 연구( I )
김성훈(Sunghun Kim),권용준(Yongjun Kwon),고필규(Pilkyu Ko),정연욱(Yeonuk Jung),임옥택(Ocktaeck Lim) 한국자동차공학회 2011 한국 자동차공학회논문집 Vol.19 No.3
Noises from diesel engine are the major issues for noise pollution as well as affect customers’ purchasing needs to vehicles powered by diesel engine. This study investigates to screen-out main factors that contribute to noises from diesel engine using VGT 2000cc engine developed recently. Changes of fuel temperature, intake temperature and the presence of three way catalyst don’t affect the ‘Engine Radiation Noise’ and the solely three way catalyst influence on the ‘Tail Pipe Noise’. Especially, there are no effects of the presence of three way catalyst on torque, which is main subject that should be considered in secondary study.
김성훈(Sunghun Kim),권용준(Yongjun Kwon),고필규(Pilkyu Ko),정연욱(Yeonuk Jung) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Noises from diesel engine are the major issues for noise pollution as well as affect customers’ purchasing needs to vehicles powered by diesel engine. This study investigates to screen-out main factors that contribute to noises from diesel engine using VGT 2000㏄ engine developed recently. Changes of fuel temperature, intake temperature and the presence of three way catalyst don’t affect the ‘Engine Radiation Noise’ and the solely three way catalyst influence on the ‘Tail Pipe Noise’. Especially, there are no effects of the presence of three way catalyst on torque, which is main subject that should be considered in secondary study.