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박판 고속 플라즈마 맞대기 용접에서 용접 시작부의 용락과 미용융에 미치는 시작블록과 아크길이의 영향
추용수,홍성준,정재필,조상명,Chu, Yong-Su,Hong, Seong-Joon,Jung, Jae-Pil,Cho, Sang-Myung 대한용접접합학회 2008 대한용접·접합학회지 Vol.26 No.2
In welding of thin plate, some defects such as melt through and unmelted zone occur easily at welding start, however there is a limited study on those problems. Therefore the effects of start block and arc length on melt through and unmelted zone at start were investigated in this study. When start block height was lower than base metal, there was melt through at start. And when the height was even with base metal, no unmelted zone existed. Unmelted zone was increased as start block height increased from 0mm to 0.5mm. However unmelted zone was not much changed as the height increasing from 0.5mm to 1.0mm. When gap existed between start block and base metal, melt through occurred. However, unmelted zone was increased as the contact force of start block on base metal was increased from 0kgf to 7.5kgf. And when arc length was decreased from 3.8mm to 3.0mm, unmelted zone was decreased. It was concluded that the optimum condition to prevent melt through and to minimize unmelted zone would be with start block height 0.25mm, contact force 3.0kgf, and arc length 3.4mm. This optimum condition was applied to the mass production line and resulted in satisfied outcome.
추관엽,김형곤,김대현,박형근,백성현,노용수 대한배뇨장애요실금학회 2012 International Neurourology Journal Vol.16 No.1
Purpose: To assess the long-term outcomes of tension-free vaginal tape (TVT) for stress urinary incontinence (SUI) with intrinsic sphincter deficiency (ISD) and to identify influencing factors for failure in these cases. Methods: A total of 136 women who underwent TVT procedures with minimum follow-up duration of 3 years were included in the study. Patients were divided into two groups (non-ISD and ISD groups) based on preoperative urodynamic studies. Patient outcomes were assessed from retrospective chart review and telephone research. Cure was defined as the subjective resolution of SUI in any circumstances. Improvement was defined as the subjective improvement of SUI without complete resolution. Failure was defined as the subjective lack of improvement of SUI. Patients in ISD group were subdivided into two subgroups (cure and non-cure groups) and were compared to identify influencing factors for TVT procedure failure. Results: Eighty-nine patients were in non-ISD group, and 47 in ISD group. The mean follow-up durations were 50.3±9.2 and 49.7±9.7 months, respectively. Subjective cure rate was 75.3% for non-ISD group, and 76.7% for ISD group (P>0.05). Improvement rate was 6.7% for non-ISD group, and 2.1% for ISD group (P>0.05). Satisfaction scores was 3.8±1.2 points in the non-ISD group, and 3.5±1.2 points in ISD group (P>0.05). In ISD subgroups, VLPP was 41.9±12.0 cmH2O for non-cure group, and 50.5±8.6 cmH2O for cure group, and was the only factor that showed significant statistical difference between the two subgroups (P=0.011). Conclusions: With our long-term results, TVT is an effective treatment even in women with ISD. However, ISD patients with low VLPP should be counseled carefully about TVT outcome.
전경규,오수민,추관엽,박형근,백성현,노용수,김형곤 대한비뇨의학회 2012 Investigative and Clinical Urology Vol.53 No.3
Purpose: The aim of this study was to assess the long-term clinical outcomes of the tension-free vaginal tape (TVT) procedure for stress urinary incontinence (SUI) in elderly women and to identify the factors influencing failure in these cases. Materials and Methods: Women with SUI who underwent a TVT procedure were studied. “Cure” was defined as no urine leakage at all in any circumstances and “improvement” was defined as some urine leakage but a score of over 4 points out of 5 in a satisfaction inquiry. Patients were divided into two groups (middle-aged, <65 years and elderly, ≥65 years) for comparison of clinical outcomes. In the elderly group, patients were subdivided into two groups (cure and no cure groups) and were compared to identify the factors influencing failure. Results: A total of 136 women (middle-aged group, 106; elderly group, 30) were enrolled in the study. The mean ages of the patients in the 2 groups were 53.5±5.9 and 72.0±5.0 years and the mean follow-up times were 50.5±9.4 and 48.8±9.1 months, respectively. The cure and improvement rates in the middle-aged and elderly groups were 80.2% vs. 66.7% and 4.7% vs. 3.3%, respectively (p>0.05). The satisfaction scores in the middle-aged and elderly groups were 3.8±1.1 vs. 3.3±1.5 points (p>0.05). In the elderly group, the body mass index of the cure and no cure groups were 24.6±3.3 kg/m2 and 26.6±1.0 kg/m2, and body mass index was the only factor that differed significantly between the two subgroups (p=0.028). Conclusions: Our long-term results suggest that TVT is an effective treatment even in elderly women. However, elderly women who are obese should be counseled carefully about the success rate. Purpose: The aim of this study was to assess the long-term clinical outcomes of the tension-free vaginal tape (TVT) procedure for stress urinary incontinence (SUI) in elderly women and to identify the factors influencing failure in these cases. Materials and Methods: Women with SUI who underwent a TVT procedure were studied. “Cure” was defined as no urine leakage at all in any circumstances and “improvement” was defined as some urine leakage but a score of over 4 points out of 5 in a satisfaction inquiry. Patients were divided into two groups (middle-aged, <65 years and elderly, ≥65 years) for comparison of clinical outcomes. In the elderly group, patients were subdivided into two groups (cure and no cure groups) and were compared to identify the factors influencing failure. Results: A total of 136 women (middle-aged group, 106; elderly group, 30) were enrolled in the study. The mean ages of the patients in the 2 groups were 53.5±5.9 and 72.0±5.0 years and the mean follow-up times were 50.5±9.4 and 48.8±9.1 months, respectively. The cure and improvement rates in the middle-aged and elderly groups were 80.2% vs. 66.7% and 4.7% vs. 3.3%, respectively (p>0.05). The satisfaction scores in the middle-aged and elderly groups were 3.8±1.1 vs. 3.3±1.5 points (p>0.05). In the elderly group, the body mass index of the cure and no cure groups were 24.6±3.3 kg/m2 and 26.6±1.0 kg/m2, and body mass index was the only factor that differed significantly between the two subgroups (p=0.028). Conclusions: Our long-term results suggest that TVT is an effective treatment even in elderly women. However, elderly women who are obese should be counseled carefully about the success rate.
연구논문 : 마카 열수추출물 첨가가 요구르트의 품질 및 항산화능에 미치는 영향
정해정 ( Hai Jung Chung ),추영란 ( Young Ran Chu ),박한나 ( Han Na Park ),전인숙 ( In Sook Jeon ),강용수 ( Yong Soo Kang ) 한국식생활문화학회 2010 韓國食生活文化學會誌 Vol.25 No.3
The objective of this study was to examine the quality characteristics and antioxidant activity of yogurt containing hot water extract from maca. Four different levels (0, 4, 8, 12%) of maca extract were added to milk followed by fermentation with lactic acid bacteria at 37℃ for 12 hrs, and then the physicochemical properties of the samples were investigated. During 7 days of storage at 4±1℃, the acid production (pH and titratable acidity) of the yogurt increased with the addition of maca extract. The Hunter L value (lightness) decreased, while the b value (yellowness) increased as the maca extract level in the yogurt increased. Viable cell counts were not significantly different among the samples. The results of consumer acceptance tests showed that no significant differences in overall acceptability were observed between the yogurts containing 4% and 8% of maca extract and a control yogurt. The yogurt containing maca extract exhibited higher DPPH radical and superoxide anion radical scavenging activities than the control yogurt over the storage period.
서영주,김기웅,주진형,이동영,윤종철,백용수,추일환,이정희,우종인 한국유전학회 2006 Genes & Genomics Vol.28 No.3
We investigated the effectiveness of stochastic search variable selection (SSVS) based on Bayesian interpretation for a genetic association study in Alzheimer's disease (AD). We applied SSVS and conventional logistic regression simultaneously to two different datasets. Dataset 1 was composed of the genotypes of apolipoprotein E and choline acetyltransferase from 185 AD patients and 562 normal controls, whereas dataset 2 was composed of genotypes of apolipoprotein E and alpha-1-antichymotrypsin from 86 AD patients and 172 normal controls. Using the SSVS approach, we analyzed best final models obtained under four different prior distributions. It was found that SSVS is as powerful or more powerful than conventional logistic regression for detecting associations between the candidate genetic markers in both datasets and the presence of AD. In particular, in dataset 2, which did not contain an individual with the candidate genetic markers of interest in normal controls, SSVS did a better job than conventional logistic regression. We conclude that SSVS is a versatile tool for the analysis of multiple candidate genes with low allele frequencies simultaneously with respect to some common complex trait such as AD.
상부 요상피암에 대한 변형된 앙와위 손을 이용한 복강경 신요관적출술
백성현(Sung Hyun Paick),박형근(Hyoung Keun Park),노용수(Yong Soo Lho),추관엽(Gwoan Youb Choo),김형곤(Hyeong Gon Kim) 대한비뇨기종양학회 2011 대한비뇨기종양학회지 Vol.9 No.3
Purpose: We developed modified supine position hand-assisted laparoscopic nephroureterectomy (MS-HALNU) without position change during the operation in patients with upper urinary tract urothelial cell carcinoma. So, we report these results. Materials and Methods: Twenty two patients (including three with metastatic cancer) with upper urinary tract urothelial cell carcinoma underwent a unilateral MS-HALNU. Patient’s position was supine but operation side was elevated 30 degree with soft pad. An 8cm Gibson incision on the operation side was performed for a distal ureterectomy and bladder cuff excision, which were carried out as open surgery. The nephroureterectomy was followed without position change using hand-assisted technique via the same incision and two additional 10mm ports. Results: All 22 MS-HALNUs were successfully completed without open conversion; there were no major complications. The average operation time was 257 minutes and the average estimated blood loss was 173ml. The average interval to resuming oral intake was 2.6 days and the average hospital stay was 8.6 days. The average follow-up period was 30.1 months. In 15 localized cases (below T2), no recurrence occurred. However, in four T3 cases, 3 recurrences (2 bladder) occurred even with adjuvant chemotherapy. In 3 palliative cases, all patients died due to disease progression. Conclusions: MS-HALNU is easy, safe and effective treatment for patients with upper urinary tract urothelial cell carcinoma.