• Wind and Structures
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• 제7권6호
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• pp.359-372
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• 2004

Wind tunnel model studies were carried out to determine the wind load distribution on tributary areas near the gable-end of large, low-rise buildings with high pitch planar and curved roof shapes. Background pressure fluctuations on each tributary area are described by a series of uncorrelated modes given by the eigenvectors of the force covariance matrix. Analysis of eigenvalues shows that the dominant first mode contributes around 40% to the fluctuating pressures, and the eigenvector mode-shape generally follows the mean pressure distribution. The first mode contributes significantly to the fluctuating load effect, when its influence line is similar to the mode-shape. For such cases, the effective static pressure distribution closely follows the mean pressure distribution on the tributary area, and the quasi-static method would provide a good estimate of peak load effects.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집B
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• pp.670-675
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• 2001

This paper describes aerodynamic preliminary design performance prediction and flow analysis for turbine of the marine middle engine turbocharger. The performance characteristics of turbocharger turbine are investigated at various operating conditions using mass flow rate and computational flow analysis for rotor and nozzle at design point are performed. Preliminary design results are performed by applying mean line and radial equilibrium theory. Performance prediction and flow analysis results show good agreement with experiments. From 3 dimensional flow analysis result, efficiency is 0.6% greater than design point. Therefore, this design approach is useful for preliminary design, and helps to increase the design capability for optimized rotor blade.

• 한국소음진동공학회논문집
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• 제21권5호
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• pp.461-467
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• 2011

This study aims to create a numerical analysis model which can investigate the dynamic interaction between pantograph and overhead contact wire used for a high-speed railway vehicle, and validate the simulation results according to EN 50318 standard. Finite element analysis models of pantograph and overhead contact line are created using SAMCEF, a commercial FE analysis program. The mean, standard deviation, maximum and minimum values of contact forces are obtained. The simulation results are validated according to EN 50318, and the possibility of simulating the collecting characteristic of an actual pantograph system by using the developed model is discussed.

• 한국방사선학회논문지
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• 제16권6호
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• pp.771-778
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• 2022

이 연구의 목적은 임상에서 AAPM CT 성능 팬텀을 이용한 CT영상 노이즈 정도관리에 사용할 수 있는 물 유효선감쇠계수의 백분율에 의한 노이즈 측정의 방법을 제시하는 데 있다. 120 kVp CT X-선 빔으로 AAPM CT 성능 팬텀을 스캔하여 얻어진 CT영상에서, CT수 직선성 삽입부분의 각 핀과 물에 대하여 평균 CT수를 측정하였다. 유효에너지는 각 핀과 물에 대하여 측정된 평균 CT수와 광자에너지별 선감쇠계수의 선형회귀분석의 상관계수들로부터 가장 큰 상관계수를 갖는 광자에너지로 결정하였다. 그리고 물과 아크릴에 대하여 측정된 평균 CT수와 유효선감쇠계수로부터 대조도 척도는 0.000188 cm^-1 · HU^-1으로 산출되었다. 산출된 대조도 척도, 물 유효선감쇠계수, 그리고 AAPM CT 성능 팬텀에서 고정핀 부분의 물에서 측정된 표준편차를 사용하여, 물 유효선감쇠계수의 백분율에 의한 노이즈 측정값은 100 ~ 300 mAs의 범위에서 0.31 ~ 0.52%를 얻었다.

• 대한치과교정학회지
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• 제26권4호
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• pp.349-358
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• 1996

부정교합을 치료하기 위해 영구치 발거여부를 결정하는 것은 교정학의 역사상 커다란 논쟁거리였고, 따라서 진단과정에서 사용되는 많은 분석법들과 발치의 기준들이 제시되었다. 이제까지 제시되어 온 발치기준들(Extraction formulas)을 검토해 보면, 치열궁 장경 부조화, 치열의 전방돌출, 그리고 환자의 골격형태에 기초하여 발치를 결정함을 알 수 있다. 이들 중에서 가장 중요하게 고려되어야 할 진단요소는 환자의 골격형태로, 결국 개개 환자의 부정교합은 그 환자의 골격형태 범위 내에서 치료되어야 하기 때문이다. EI(Extraction Index)는 환자의 골격형태를 감별진단 할수 있는 CF를 기본으로 구성되어 있고, CF는 부정교합의 수직적, 수평적 요소를 감별해내는 ODI이와 APDI로 이루어져 있다. 또한 피에는 환자의 안모에 영향을 미치는 절치간 각과 입술의 전후방 위치가 포함되어 있어서 안모형태도 고려되어 있다. 본 연구에서는 정상 교합자로서 골격이 조화를 이루며 좋은 안모를 가지고 있고 교정치료를 받은 적이 없는 11.2 - 14.4 세의 아동을 대상으로 하여 두부계측 방사선 사진을 분석하여 EI에 관련된 항목들을 측정한 결과, 다음과 같은 결론을 얻었다. 1. ODI이는 $73.5^{\circ}$, APDI는 $82.8^{\circ}$, CF는 $156.3^{\circ}$ 였다. 2. 절치간 각은 $123.6^{\circ}$ 였다. 3. E-line에 대한 상순의 거리는 0.0mm, 하순은 1.4mm 였다. 4. Extraction Index는 153.8 였다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권10호
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• pp.4353-4356
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• 2015

Background: Levofloxacin is an effective medication for second line Helicobacter pylori (H. pylori) eradication. However, limited studies have approved its use as an effective antibiotic in first line therapy. Dexlansoprazole is a new PPI and lacks of evidence in support of a role in H. pylori eradication. This study was designed to evaluate efficacy of levofloxacin-dexlansoprazole-based quadruple therapy for H. pylori eradication in Thailand. Materials and Methods: This prospective randomized control study was performed during June 2014 to December 2014. H. pylori infected gastritis patients were randomized to receive 7- or 14-day levofloxacin-dexlansoprazole based on quadruple therapy (levofloxacin 500 mg OD, dexlansoprazole 60 mg bid, clarithromycin MR 1000 mg OD, bismuth subsalicylate 1048 mg bid). CYP2C19 genotyping and antibiotic susceptibility tests were conducted for all patients. A 13C urea breath test was performed to confirm H. pylori eradication at least 4 weeks after treatment. Results: A total of 100 patients were enrolled, comprising 44 males and 56 females (mean age of 52.6 years). Eradication rate by PP analysis was 85.7% (42/49) with the 7-day regimen and 98% (48/49) with the 14-day regimen (85.7% vs 98%; p-value=0.059). ITT analysis was 84% and 96% with 7- and 14-day regimens, respectively (84% vs 96%; p-value=0.092). Antibiotic susceptibility testing demonstrated 35.1% resistance to metronidazole, 18.3% to clarithromycin, and 13.5% to levofloxacin. CYP2C19 genotyping revealed 54.1% RM, 34.7% IM and 11.2% PM. The 14-day regimen provided 100% eradication in patients with clarithromycin or dual clarithromycin and metronidazole H. pylori resistant strains. Moreover, the eradication rate was 96.6% in patients with CYP2C19 genotype RM. Conclusions: The 14-day levofloxacin-dexlansoprazole based quadruple therapy provides high H. pylori eradication regardless of CYP2C19 genotype, clarithromycin or dual clarithromycin and metronidazole resistant strains. This regimen could be use as an alternative first line therapy for H. pylori eradication in Thailand.

• 한국지능시스템학회논문지
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• 제24권6호
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• pp.665-670
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• 2014

SVM은 학습 데이터를 두 개의 집단으로 분리시키는 최적의 초평면을 찾는 이진 분류기로서 우수한 성능 때문에 다양한 분야에서 귀납 추론, 이진 분류, 예측 등을 목적으로 사용되는 알고리즘이다. 또한 대표적인 블랙박스 모델 중 하나이기 때문에 학습 후 생성되는 SVM의 해석에 대한 연구도 활발히 진행되고 있다. 본 논문에서는 SVM 알고리즘을 이용하여 기상 레이더의 데이터 내에 비교적 높은 빈도로 발생하여 기상 예보의 정확도를 감소시키는 비강수에코 중 하나인 선에코를 자동으로 탐지하는 방법에 대한 연구를 수행하였다. 학습 데이터로는 평균 반사도, 크기, 발생 형태, 중심 고도 등과 같은 특성을 활용하였는데, 이는 기상 레이더 데이터에 저장된 다양한 데이터 중 반사도 값을 선택한 후 클러스터링 기법을 통해 추출한 것이다. 이와 같이 학습된 SVM 분류기를 실제 사례를 바탕으로 하여 검증하였으며, Decision Tree 알고리즘을 적용하여 생성한 분류기의 해석을 수행하였다.

• 복식문화연구
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• 제31권5호
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• pp.640-650
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• 2023

This study aimed to suggest a suitable collar pattern by visually evaluating the appearance of the amount of collar drape by the starting position of the lapel line of a double-breasted tailored jacket using a 3d virtual fitting program. It created an avatar based on the mean size of women in their 20s (the 8th Size Korea) using clo network (double fastening: 10cm, collar width: 4.5cm, collar stand: 3cm, and lapel width: 8.5cm). The starting of the lapel twist line was waistline level, the 1/2 level of bustline and waistline, or bustline level, and collar laying amount was 4.5, 5.5, 6.5, or 7.5cm. It was evaluated by garment construction experts using 5, 6, and 4 items on the front, sides, and back, respectively. Descriptive statistics, F-test, Duncan-test, and reliability analysis were conducted using SPSS 22. When collar laying amount was 6.5cm, it was best rated regardless of the starting point. Under waist line, when collar laying amount was 6.5cm, it was best rated regardless of the starting point. When collar laying amount was large, the collar's outline length increased, resulting in unnecessary wrinkles from the neckline to the lapel, affecting the overall collar appearance. When collar laying amount was the smallest, the collar was lifted and the width was narrowed, exposing the seam connecting the collar and neckline. The length of the collar's outline varied depending on collar laying amount, which was important to make the outline sit comfortably on the body.

• Asian Pacific Journal of Cancer Prevention
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• 제15권10호
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• pp.4117-4123
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• 2014

Background: To determine prognostic value of excision repair cross-complementation 1 (ERCC1) in patients with malignant pleural mesothelioma (MPM). Materials and Methods: The study included 60 patients with MPM who were diagnosed and treated in the Radiation Oncology Department of Kayseri Teaching Hospital and Medical Oncology Department of Erciyes University, Medicine School between 2005 and 2013. By using immunohistochemical methods, ERCC1 expression in biopsy specimens was evaluated. We retrospectively assessed whether there is a correlation between ERCC1 and response to anti-neoplastic therapy or survival. Results: There were 50 men and 10 women with median age of 62 years (range: 39-83). Histological type was epithelial mesothelioma in the majority of the cases (85%), most commonly presenting in stage four. Of the cases, 20 (33%) received radiotherapy, 60 (%100) received first-line chemotherapy and 15 (%25) received second-line chemotherapy. In the assessment after therapy, it was found that there was partial response in 12 cases (20%), stable disease in 19 cases (31.4%) and progression in 25 cases (41.7%). ERCC1 was positive in 43% of the cases. Mean OS was 11.7 months and mean DFS was 9.5 months in ERCC1-positive cases regardless of therapy, while they were 19.2 months and 17.1 months in ERCC1-negative cases, respectively. The difference was found to be significant (p<0.05). In univariate analysis, stage, comorbidity, response to treatment and ERCC1 expression were found to be significantly associated with OS (p=0.083; p=0.043; p=0.041; p=0.050). In multivariate analysis, response to treatment remained to be significant for OS (p=0.005). In univariate and multivariate analyses, response to treatment and ERCC1 were found to be significantly associated with DFS (p=0.049; p=0.041). Conclusions: ERCC1 was identified as poor prognostic factor in patients with MPM.

• 한국운동역학회지
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• 제16권1호
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• pp.109-117
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• 2006

The purpose of this study was done in order to investigate the Kinematical variables of the Rybalko motion on the Horizontal bar using the 3-dimensional cinematographic method. For this study, three excellent athletes take part in a 2003 Daegue universid game were chosen. The subject,s Rybalko motion was filmed with S-VHS camera at the speed of 60 fields per second and digitized the each fields. And the Kwon3D 3.1 version program was employed to obtain 3-dimensional data. As a result of this study. 1. A total time spent for performing Rybalko skill was Mean $2.52{\pm}0.13sec$. From starting down swing to releasing right hand the Mean $0.84{\pm}0.24sec$ was taken. 2. In the event 3 of Rybalko motion, that is, the moment which the right-hand is released on the bar, the center of mass must is employed at the position above the horizontal line of bar. In this research, the average vertical displacement(z axe) of center of mass shows $47.87{\pm}3.14cm$. 3. In the event 5, that is, the moment which the right-hand is catched again on the bar, the center of mass is employed at the position before the vertical line of bar. In this research, the average horizontal displacement(z axe) of center of mass shows $47.87{\pm}3.14cm$. 4. It has been seen that, at the moment of release of right-hand, lateral variation of center of mass is 13.395cm, vertical variation of center of mass is 7.41cm Thus, it is concluded that lateral variation of center of mass should be reduced for high grade to be acquired. 5. It has been founded that high speed of down swing influences speed of up swing, and that, in the motion of twist, the horizontal speed is little changed.