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플레이트를 이용한 냉간성형 각형강관 T형 접합부에 관한 실험적 연구
석희원,박금성,정상민,조성식,배규웅,문태섭 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
The purpose of this paper is to investigate experimentally the strength and deformation of T-joints to evaluate the structural behavior of truss connection consisted in square hollow steel section with plate. There are the branch plate type in T-joint shapes. Principal parameters are the ratio of the chord width to thickness(2ν=31.3, 22.2, 16.7) and the ratio of branch plate thickness to chord width(βp=0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.75, 0.85). The most important result obtained from this experiment is as follows; The ultimate strength of T-joints increase proportionally as the 2ν ratio decrease, and the βp ratio increase. The others, experimental results are summarized for ultimate strength to displacement, initial stiffness and failure mode of each T-joints.
혈당검사 방법 별 지각된 통증정도에 대한 비교 : 시각적 상사 척도 이용
최자윤,장금성,김현오,최옥엽,박민희 성인간호학회 2003 성인간호학회지 Vol.15 No.1
Purpose: The purpose of this study is to determine the level of pain related to a blood sugar test. Specifically, the study attempts to compare the varying degree of pains when different types of blood sugar test are used. Method: A sample of 56 subjects is composed of DM patients admitted to a medical ward of C university hospital in Gwangju. Data were collected from July, 2001 to December, 2001. The blood sugar tests were administered in four different ways: (1) the use of 27G needle only. (2) the use of 27G needle followed by ice-packed treatment, (3) the use of 27G needle after EMLA cream application, and (4) the use of lancet. The degree of pain is measured with a visual analogue scale and performed twice. Result: in both measures, the use of 27G needle only method is shown to cause the highest level of pain in comparison with the rest of methods (F=4.01, p=.01; F=8.14, p=.00). However, the differences in pain between time in all methods were not found to be significant (t=-.85, p=.40; t=.80, p=.42; t=.31, p=.75; t=.19, p=.85). Conclusion: The study results indicate that the method using lanceter is more recommendable than the use of 27G needle only method. Further research is needed to support the current study result with the use of different measurement scales and to determine effective methods of blood sugar test to lower pain and compliance.
Lee, Young Hwan,Kim, Han Joon,Moon, Taehwan,Kim, Keum Do,Hyun, Seung Dam,Park, Hyeon Woo,Lee, Yong Bin,Park, Min Hyuk,Hwang, Cheol Seong IOP Pub 2017 Nanotechnology Vol.28 No.30
<P>HfO<SUB>2</SUB>-ZrO<SUB>2</SUB> solid-solution films were prepared by radio frequency sputtering, and the subsequent annealing process was optimized to render enhanced ferroelectric behavior. The target power, working pressure and O<SUB>2</SUB> partial pressure ratios were varied, along with the annealing gas, time and temperature. Then, the film’s structural and electrical properties were carefully scrutinized. Oxygen-deficient conditions were necessary during the sputter deposition to suppress grain growth, while annealing by O<SUB>2</SUB> gas was critical to avoid defects and leakage problems. It is expected that the grain size difference under various deposition conditions combined with the degree of TiN top and bottom electrode oxidation by O<SUB>2</SUB> gas will result in different ferroelectric behaviors. As a result, Hf<SUB>0.5</SUB>Zr<SUB>0.5</SUB>O<SUB>2</SUB> prepared by radio frequency sputtering showed optimized ferroelectricity at 0% of O<SUB>2</SUB> reactive gas, with a doubled remnant polarization value of ∼20 <I>μ</I>C cm<SUP>−2</SUP> at a thickness of 11 nm. Film growth conditions with a high growth rate (4–5 nm min<SUP>−1</SUP>) were favorable for achieving the ferroelectric phase film, which feasibly suppressed both the grain growth and accompanying monoclinic phase formation.</P>
Min-Jeng Cho,Ji Hoon Kim,Sung Jeep Kim,Kyu Hyouck Kyoung,Min Ae Keum,Sung Kyun Park 대한소아청소년과학회 2019 Clinical and Experimental Pediatrics (CEP) Vol.62 No.3
Purpose: Several published policy statements have warned against the risks associated with trampoline use and recommended safety guidelines. However, few studies have focused on trampoline-related injuries in Korea. This study aimed to assess the incidence and characteristics of pediatric trampoline-related injuries presented to Ulsan University Hospital. Methods: We retrospectively reviewed the medical records of children aged <16 years with trampoline-related injuries who visited our Emergency Department between 2008 and 2017. Results: Over the 10-year period, 178 trampoline-related injuries were reported, which represented a significant increase (P=0.016). Most (87.6%) of the injuries occurred during the last 5 study years, and a rapid increase in injuries was observed in children aged <6 years. Lower extremity injuries (62.4%) were the most common, followed by injuries of the upper extremities, head and face, and trunk, including injuries to the neck and spine. Sixty-seven children (37.6%) had fractures, and proximal tibia fractures were the most common. Fractures were significantly more common in younger children (<6 years old) than in older children (P=0.026). Conclusion: In Korea, the mechanism of trampoline injury is similar to that of injuries incurred in indoor trampoline parks but is characterized by smaller spaces and multiple users. Trampoline use and the incidence of trampoline-related injuries in children aged <6 years are increasing rapidly. Prohibiting the use of trampolines for children aged <6 years, restricting simultaneous use by multiple children, and ensuring adult supervision should be strictly emphasized. Public awareness and policy guidelines are needed to reduce the incidence of trampoline-related injuries
( Min Sung Yoon ),( Hee Seung Lee ),( Chang Moo Kang ),( Woo Jung Lee ),( Jiyoung Keum ),( Min Je Sung ),( Seungseob Kim ),( Mi-suk Park ),( Jung Hyun Jo ),( Moon Jae Chung ),( Jeong Youp Park ),( Seu 대한소화기학회 2022 Gut and Liver Vol.16 No.1
Background/Aims: Controversy regarding the effectiveness of neoadjuvant therapy for resectable pancreatic ductal adenocarcinoma (PDAC) still exists. Here, we aimed to identify the potential benefits of neoadjuvant therapy followed by surgery for resectable PDAC. Methods: We reviewed radiologically resectable PDAC patients who received resection with curative intent at a tertiary hospital in South Korea between January 2012 and August 2019. A total of 202 patients underwent curative resection for resectable PDAC: 167 underwent surgical resection first during this period, and 35 received neoadjuvant chemotherapy/chemoradiation therapy followed by surgery. Resectable PDAC patients were subdivided, and 1:3 propensity score matching (PSM) was performed to reduce selection bias. Results: Compared with the group that received surgery first, the group that received neoadjuvant treatment followed by surgery had significantly smaller tumors (22.0 mm vs 27.0 mm, p=0.004), a smaller proportion of patients with postoperative pathologic T stage (p=0.026), a smaller proportion of patients with lymphovascular invasion (20.0% vs 40.7%, p=0.022), and a larger proportion of patients with negative resection margins (74.3% vs 51.5%, p=0.049). After PSM, the group that received neoadjuvant therapy had a significantly longer progression-free survival than those in the group that underwent surgery first (29.6 months vs 15.1 months, p=0.002). Overall survival was not significantly different between the two groups after PSM analysis. Conclusions: We observed significantly better surgical outcomes and progression-free survival with the addition of neoadjuvant therapy to the management of resectable PDAC. However, despite PSM, there was still selection bias due to the use of different regimens between the groups receiving surgery first and neoadjuvant therapy. Large homogeneous samples are needed in the future prospective studies. (Gut Liver 2022;16:118-128)
Poster Session : Coordinated activation of PDK1 by tyrosine phosphorylation
( Keum Jin Yang ),( Sang Hee Shin ),( Long Zhen Piao ),( Eul Soon Shin ),( Kyung Ah Park ),( Hee Sun Byun ),( Min Ho Won ),( Gang Min Hur ),( Jeong Ho Seok ),( Brian A Hemmings ),( Jong Sun Park ) 한국생화학분자생물학회 (구 한국생화학회) 2006 생화학분자생물학회 춘계학술발표논문집 Vol.2006 No.-
박금룡 ( Keum Young Park ),김현태 ( Hyun Tae Kim ),김성국 ( Sung Kook Kim ),고종민 ( Jong Min Ko ),박성호 ( Seong Ho Park ),윤홍태 ( Hong Tae Yun ),황규석 ( Kyu Seok Hwang ) 한국콩연구회 2013 韓國콩硏究會誌 Vol.30 No.1
This study aims to evaluate the enhance policy for paddy soybean production through comparison between Korea and Japansee` supporting policy. The Korean govemment set a goal to increase the self supply rete for food and processing to 50% by paddy soybean cultivation. However, the soybean production was decreased continuously every year, because of lower income than other summer crops and lower price comparability comparing with imported soybeans. We assess that the main cause of failure for the enhance pf paddy soybean production resulred from inconsistent policy which had been discontinued it in 2007 year after puting into force for five years(from 2002 to 2006). On the other Hand, Japanese government have continued to ip to present since setting paddy soybean supporting policy in 1971 year, therefore the cultivated area of soybean production in paddy fields accounts for above 120 thousand ha, about 85% of total soybean area.
External validation of IBTR! 2.0 nomogram for prediction of ipsilateral breast tumor recurrence
Byung Min Lee,Jee Suk Chang,Young Up Cho,Seho Park,Hyung Seok Park,Jee Ye Kim,Joo Hyuk Sohn,Gun Min Kim,Ja Seung Koo,Ki Chang Keum,Chang-Ok Suh,Yong Bae Kim 대한방사선종양학회 2018 Radiation Oncology Journal Vol.36 No.2
Purpose: IBTR! 2.0 nomogram is web-based nomogram that predicts ipsilateral breast tumor recurrence (IBTR). We aimed to validate the IBTR! 2.0 using an external data set. Materials and Methods: The cohort consisted of 2,206 patients, who received breast conserving surgery and radiation therapy from 1992 to 2012 at our institution, where wide surgical excision is been routinely performed. Discrimination and calibration were used for assessing model performance. Patients with predicted 10-year IBTR risk based on an IBTR! 2.0 nomogram score of 〈3%, 3%–5%, 5%–10%, and 〉10% were assigned to groups 1, 2, 3, and 4, respectively. We also plotted calibration values to observe the actual IBTR rate against the nomogram-derived 10-year IBTR probabilities. Results: The median follow-up period was 73 months (range, 6 to 277 months). The area under the receiver operating characteristic curve was 0.607, showing poor accordance between the estimated and observed recurrence rate. Calibration plot confirmed that the IBTR! 2.0 nomogram predicted the 10-year IBTR risk higher than the observed IBTR rates in all groups. High discrepancies between nomogram IBTR predictions and observed IBTR rates were observed in overall risk groups. Compared with the original development dataset, our patients had fewer high grade tumors, less margin positivity, and less lymphovascular invasion, and more use of modern systemic therapies. Conclusions: IBTR! 2.0 nomogram seems to have the moderate discriminative ability with a tendency to over-estimating risk rate. Continued efforts are needed to ensure external applicability of published nomograms by validating the program using an external patient population.
Cho, Min Jeng,Kim, Jihoon,Kim, Sung Jeep,Kyoung, Kyu Hyouck,Keum, Min Ae,Park, Sung Kyun The Korean Pediatric Society 2019 Clinical and Experimental Pediatrics (CEP) Vol.62 No.3
Purpose: Several published policy statements have warned against the risks associated with trampoline use and recommended safety guidelines. However, few studies have focused on trampoline-related injuries in Korea. This study aimed to assess the incidence and characteristics of pediatric trampoline-related injuries presented to Ulsan University Hospital. Methods: We retrospectively reviewed the medical records of children aged <16 years with trampoline-related injuries who visited our Emergency Department between 2008 and 2017. Results: Over the 10-year period, 178 trampoline-related injuries were reported, which represented a significant increase (P=0.016). Most (87.6%) of the injuries occurred during the last 5 study years, and a rapid increase in injuries was observed in children aged <6 years. Lower extremity injuries (62.4%) were the most common, followed by injuries of the upper extremities, head and face, and trunk, including injuries to the neck and spine. Sixty-seven children (37.6%) had fractures, and proximal tibia fractures were the most common. Fractures were significantly more common in younger children (<6 years old) than in older children (P=0.026). Conclusion: In Korea, the mechanism of trampoline injury is similar to that of injuries incurred in indoor trampoline parks but is characterized by smaller spaces and multiple users. Trampoline use and the incidence of trampoline-related injuries in children aged <6 years are increasing rapidly. Prohibiting the use of trampolines for children aged <6 years, restricting simultaneous use by multiple children, and ensuring adult supervision should be strictly emphasized. Public awareness and policy guidelines are needed to reduce the incidence of trampoline-related injuries.