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한문식,박태인,Han, Mun-Sik,Park, Tae-In 한국기계연구원 1985 기계연구원소보 Vol.15 No.-
In this paper, temperature distribution and thermal stress are investigated considering engine peak pressure and the time average temperature distribution in the piston under running conditions for the diesel engine. The induced stress are calculated by the Finite Element Method(FEM). The results obtained are summerized as follows. 1) The results calculated by the FEM present good agreement with other numerical solution in literature. 2) It is confirmed that maximum compressive stress are induced in the part of outside wall between the piston crown and the pin bush. 3) In the axial direction, the hoop stresses are changed its sigh at the portion of crown near the inner wall side 4)Large gradient of temperature is shown in the piston crown near the side wall in the axial direction, in the part between the piton crown and the pin bush in radical direction 5)in case of stress distribution of piston wall surface in the axial direction, the hoop stress is a little greater than axial stress, and the latter is greater than the radial stress
역공학과 QFD를 활용한 퍼스널모빌리티 시스템 요구사양 도출
김인규(In-Kyu Kim),박태한(Tae-han Park),정연찬(Yun-Chan Chung) 한국컴퓨터정보학회 2019 한국컴퓨터정보학회 학술발표논문집 Vol.27 No.1
본 연구에서는 주행승차감 및 안정성을 고려한 전동킥보드의 문제점을 해결하기 위해 역공학 기법을 사용하여 주요 시스템의 품질요소, 제품특성 등을 분석하고 사용자 요구사항을 도출하기 위해 품질기능전개(QFD: Quality Function Deployment)방법론을 적용하였으며 그 결과로 사용자 요구사항은 6개의 범주에서 20개를 도출하였으며 품질특성 요구사항은 16개 도출하여 최종 12개를 시스템 품질특성(CTQ: Critical To Quality)으로 선정하였다.
김우건(Woo Kun Kim),박영환(Young Hwan Park),이규형(Kyoo Hyung Lee),이정신(Jung Shin Lee),박태한(Tae Han Park),안한종(Han Jong Ahn),홍준혁(Jun Hyuk Hong),김청수(Choung Soo Kim) 대한내과학회 1999 대한내과학회지 Vol.57 No.3
N/A Transitional cell carcinoma(TCC) of the bladder is confined to mucosa or submucosa on initial presentation. However, high grade superficial tumors tend to recur and progress to muscle invasive or metastatic diseases. Regardless of radical cystectomy in invasive bladder cancer, a poor prognosis was noted due to local recurrence and distant metastasis in recent studies. In this study, the clinical and pathological factors affecting survival of patients with muscle invasive bladder cancer were analyzed. Methods : A total of 105 patients with histopathologically verified muscle invasive bladder cancer who were admitted to Asan Medical Center between August 1989 and August 1998 were reviewed retrospectively. The clinical manifestations, laboratory findings, and histopathological findings at initial diagnosis were evaluated. Overall survival, disease free survival, and disease specific survival according to many prognostic factors were also analyzed. Results : The factors affecting overall survival of muscle invasive bladder cancer were age, sex, TNM stage, performance status, tumor size, invasion of deep bladder muscle, tumor grade, lymphovascular invasion, and complete resection of tumors. In patients with completely resected bladder cancer by radical cystectomy, tumor size, deep bladder muscle invasion, stage, and lymph node involvement were significant prognostic factors. In patients who had either incomplete resection of bladder cancer or in whom no operation was performed, the survival rate was lower in cases with lymph node involvement or hemoglobin level of less than 10 g/dl. Conclusion : After radical cystectomy, the recurrence rate appeared to be higher in solid tumors with deep bladder muscle invasion and lymphovascular invasion on cystoscopic findings. Overall survival was higher in patients with lower tumor stage, no lymph node involvement, and completely resected bladder cancer. Age and sex had no significant correlation with overall survival. No apparent survival advantage was noted in those patients who received post-operative chemotherapy. However, prospective randomized controlled studies are necessary to evaluate the benefit of adjuvant chemotherapy in muscle invasive bladder cancer. (Korean J Med 57:333-347, 1999)
요철형 PE - PANEL 과 콘크리트 합성구조물의 구조해석
김두환,박태인,박우영,한석규 한국산업안전학회 2001 한국안전학회지 Vol.16 No.2
Theoretical definitions of mixed behavior of PE panel and concrete should have preceded to cause a mixed behavior of concrete and polyethylene which have different elastic module, one-line expansion coefficients, poison ratios, compressive strengths and tensile strengths. Consequently, changes are analyzed through experiment process to identify the effects on interpretation of mixed behavior on the basis of temperature change of structures, temperature rise of concrete other than PE panel due to hydration heat, temperature rise of concrete other than PE panel due to drying and contraction, working of hydrostatic pressure by storage and temperature gradient. From the results of interpretation of the analysis, it is concluded that PE panel have slight influences on the change of stress of structures and maintains stability with compared with concrete structures without PE panel.
곽은경,김동자,박지영,배한익,채종민,곽정식,박태인 大韓法醫學會 1998 대한법의학회지 Vol.22 No.2
Strong corrosive acid is accidentally ingested by children or by psychiatric patients for the purpose of suicidal attempt. Late complications include chemical burn to pharyunx, perforation and stricture of upper gastrointestinal tract, respiratory insufficiencyand renal failure caused by hemoglobinuria following hemolysis. Acetic acid is difficult to ingestion large volume in a time because it is a strong irritant, provocating painful pharynx, and its autopsy case is rare. We report an autopsy case of acetic acid intoxication with acute disseminated intravascular coagulation (DIC) in several hours. We present pathogenesis of acetic acid intoxication and the associated forensic problems. A comatous 39-year-old female was admitted to emergency room 6 hours after she swallowed 90 gm of acetic acid. She was treated with gastric lavage but she was expired 9 hours after swallowing acetic acid. She was consulted to Department of Forensic Medicine of Kyungpook National University School of Medicine. She was grossly icteric and livor mortis was generally dark red. External wounds were 10 hemorrhagic lesions with 5 x 3.7cm and 3 x 2.8cm on the left arm and hand dorsum and facial abrasions. Internal gross examination revealed several purpural lesions in the gastric serosal surface and greater omentum. Microscopically, the stomach showed diffuse mucosal coagulation necrosis and intravascular hyalinized or fibrinoid thrombi in submucosal blood vessels. Liver showed necrosis of periportal area (zone I) and intracellular cholestasis around the central vein. Sections from renal tissue frequently show hemoglobin casts in the tubules and RBCs in the Bowman's capsules. Acetic acid of a remnant bottle, sampled blood and bloody necrotic tissues in the stomach were toxicologically examined in National Science Laboratory. The purity of ingested acetic acid is 98%, the concentration of acetic acid ion in blood is 734ppm and the content in gastric juice is 0.09%. In patients after acetic acid ingestion, DIC is most probably caused by procoagulants, produced by extensive acid-induced necrosis of the upper gastrointestinal tract. In this case, several purpural lesions were revealed on the arm, around facial abrasion and intravenous injection sites of the wrists. These are important to differentiate with contusion because she was battered before acetic acid ingestion. Purpurae in DIC are poorly demarcated, dark purple elevations with spreading margin but subcutaneous hemorrhage in contusion is grayish black or dark red with well demarcation (Table 2). But careful examination should be considered because traumatic hemorrhage is also exaggerated and mixed in DIC. (The Korean Journal of Legal Medicine)