http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Park, Joong Cheul,Kwon, Jae Do Trans Tech Publications, Ltd. 2005 Key Engineering Materials Vol.297 No.-
<P>A combined axial-torsional low cycle fatigue test was carried out to predict the fatigue life under in-phase and out-out-phase loading conditions for CF8M cast stainless steels. The Fatemi-Socie (FS) parameter which is based on the critical plane approach is not only one of the many methods but also the best method that can predict the fatigue life under a biaxial loading condition. But the result showed that, a biaxial fatigue life prediction by using the FS parameter with several different parameters for the CF8M cast stainless steels is not conservative enough but at the same time it was the best result so far. So in this present research, we proposed a new fatigue life prediction parameter (Park-Kwon parameter) by considering effective the shear stress instead of the FS parameter which considers the maximum normal stress acting on the maximum shear strain and its effectiveness was verified.</P>
이중근,박우철,이현창,정달도 三陟大學校 2001 論文集 Vol.34 No.1
In this paper, the transmitted noise reduction of piezoelectric smart panels is experimentally studied. The proposed piezoelectric smart panels are comprised of plate structure on which piezoelectric sensor/actuators are bonded and sound absorbing material and/or gap are provided. It is a combination of passive and active approaches utilizing a passive effect at high frequencies and active effect at low frequencies. To prove the concept of piezoelectric smart panels, and acoustic measurement experiment is performed. An acoustic tunnel is designed and its acoustic characteristics are tested. Below 800㎐, the tunnel exhibits a plane wave guide characteristics. When an absorbing material is bonded on a single plate, a remarkable transmitted noise reduction in mid frequency range is observed except the first resonance frequency. By enabling the active control of smart single panel, much noise reduction is achieved at the resonance frequencies. The smart double panel has more potential to reduction the transmitted noise in wide range frequency. Piezoelectric smart panels incorporating passive absorbing material and active piezoelectric devices is a promising technology for noise reduction in a wide range frequency.
일부 농촌지역 청소년층의 성장발육과 영양상태에 관한 연구
김종진,윤태영,최중명,박순영,구도서,박양원 慶熙大學校 1987 論文集 Vol.16 No.-
In order to assess the physical growth and development, and nutritional status of primary, middle and high school students in the town of Samchoek, Kangwon province as rural area, physiques of 3,793 persons(Male; 1,884. Female; 1,909)were measured from May 1 to May 31 in 1986 and various physical and nutritional indices related to them were calculated.
How We Have Treated Severe to Critically Ill Patients With Coronavirus Disease 2019 in Korea
Park Do Hyeon,Kang Chang Kyung,Choe Pyoeng Gyun,Kim Nam Joong,Park Wan Beom,Oh Myoung-don 대한의학회 2022 Journal of Korean medical science Vol.37 No.49
Since 2019, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread worldwide, and the coronavirus disease 2019 (COVID-19) pandemic currently continues. In response to this unprecedented pandemic, several researchers and medical staff have struggled to find appropriate treatments for COVID-19. Patients with mild symptoms can recuperate with symptomatic care, however establishing treatment for severe to critically ill patients who can have a high mortality has been essential. Accordingly, the guidelines for COVID-19 treatment have evolved through numerous trials and errors and have been relatively well established to date. In the Republic of Korea, several evidence-based guidelines for COVID-19 treatment were released and revised, reflecting various research and regional medical conditions. To date, approximately 3 years after the beginning of the COVID-19 pandemic, we are reflecting on the changes in the guidelines thus far and have summarized the treatment experience of severe to critically ill patients with COVID-19. The Korean guidelines for COVID-19 treatment have been updated continuously as the National Institutes of Health (NIH) guidelines have changed. Dexamethasone is currently used as the backbone for the treatment of severe to critically ill patients with COVID-19, and remdesivir, baricitinib, and tocilizumab can be added depending on a patient’s situation. In addition, venous thromboembolism prophylaxis is one of the important adjunctive therapies for patients with severe COVID-19. In the clinical field, treatment of severely ill patients with COVID-19 based on guidelines is widely practiced by medical staff and established currently.
Park, Joong-Won,Park, Kyung Woo,Cho, Sang Hyung,Park, Hong Suk,Lee, Woo Jin,Lee, Do Hoon,Kim, Chang-Min American College of Gastroenterology 2005 The American journal of gastroenterology Vol.100 No.10
<P>OBJECTIVES: Systemic chemotherapy may lead to immune suppression and possible reactivation of hepatitis B virus (HBV), suggesting prophylactic antiviral therapy in cancer patients with HBV. Transcatheter arterial chemoembolization (TACE) for hepatocellular carcinoma (HCC) is not a systemic chemotherapy, but has been partially associated with HBV reactivation. The aim of this study was to evaluate whether TACE aggravates HBV hepatitis in patients with HBV-related HCC. METHODS: Eighty-nine patients with HBV-related HCC were studied prospectively. Patients treated with TACE were enrolled in the case group (n = 69), and patients in follow-up or awaiting treatment were enrolled in the control group (n = 20). TACE was performed with doxorubicin (20-60 mg) and lipiodol (2-20 mL). RESULTS: Three (4.3%) patients in the TACE group and 2 (10%) patients in the control group showed HBV reactivation (p= 0.334). A twofold or more increase in serum HBV DNA was detected in 21 (30.4%) patients in the TACE group and 4 (20%) patients in the control group (p= 0.361). Exacerbation of viral hepatitis B was found in 4 (5.8%) patients in the TACE group and no patients in the control group, but the difference between the two rates was not statistically significant (p= 0.271). Three of the four reactivated patients showed spontaneous recovery within 1 month, and one showed tumor-progression-related exacerbation. CONCLUSIONS: One session of TACE using doxorubicin and lipiodol does not significantly aggravate HBV hepatitis in patients with HBV-related HCC.</P>
Risk Factors for Gallstone Formation after Surgery for Gastric Cancer
Park, Dong Jin,Kim, Ki Hyun,Park, Young Suk,Ahn, Sang-Hoon,Park, Do Joong,Kim, Hyung-Ho The Korean Gastric Cancer Association 2016 Journal of gastric cancer Vol.16 No.2
Purpose: The incidence of gallstones after gastrectomy for gastric cancer is higher than in the general population. However, the causes and mechanisms of post-gastrectomy gallstones are unclear. The aim of this study was to evaluate the incidence of gallstone formation and the risk factors for their development after gastrectomy for gastric cancer. Materials and Methods: Of 1,744 gastric cancer patients who underwent gastrectomy at Seoul National University Bundang Hospital between January 2010 and December 2012, 1,284 were included in this study and retrospectively reviewed. Patients' age, sex, body mass index (BMI), tumor location, stage, type of gastrectomy, type of reconstruction, and extent of node dissection were evaluated. Results: The incidence of gallstones after gastrectomy for gastric cancer was significantly higher in men than in women (P=0.019). Exclusion of the duodenum during reconstruction was associated with a significantly higher incidence of gallstones (P=0.003). Overweight and obese patients with BMI ${\geq}23kg/m^2$ had significantly higher incidence of gallstones than those with a lower BMI (P=0.006). Multivariate analysis showed that obesity (hazard ratio, HR=1.614; 95% confidence interval, CI: 1.135~2.296; P=0.008), male sex (HR=1.515, 95% CI: 1.029~2.231, P=0.033), and exclusion of the duodenum (HR=1.648, 95% CI: 1.192~2.280, P=0.003) were significant, independent risk factors for gallstones after gastrectomy. Conclusions: The cumulative incidence of gallstones for 5 years after gastrectomy was 15.3%. Male sex, obesity, and exclusion of the duodenum were risk factors for gallstone formation after gastrectomy. Careful surveillance will be required for these patient groups after gastrectomy.