• Journal of Chest Surgery
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• 제26권12호
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• pp.904-908
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• 1993

Twelve patients had undergone repair of atrioventricular septal defects. Age at operation ranged from 2.4 years to 17 years[mean, 8.25 years]. Five patients were male and seven were female. Three patients had complete atrioventricular septal defect[Rastelli type A] associated with Down`s syndrome. One of the three patient with complete atrioventricular septal defect had tetralogy of Fallot. Three patients had the intermediate form and seven patients had the partial form. The primum atrial septal defect was closed with pericardial patch. The atrioventricular valve septal commissure[mitral cleft] was closed with pledgeted sutures. Three complete atrioventricular septal defect were undergone by two-patch technique. A crescent-shaped Dacron patch was used to occlude the ventricular septal defect. One patient of partial form was sudden death 5 days postoperatively. There were no another complications after surgery. One patient underwent reoperation for opened mitral cleft 2.5 years postoperatively. New York Heart Association functional class of patients was improved postoperatively.

• 복식
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• 제56권8호
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• pp.15-34
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• 2006

Knit wear was industrialized, diversified, specialized and was made into high-class and it is including knitted cloth and small product for fashion as well as cardigan, sweater, and jacket etc. unlike past recognition only with underwear and inner wear. To consider elasticity to be the best strength of knit wear, middle-aged women that form change is serious are wearing knit wear as clothes for going out, and this may be regarded as clothes action to be conscious of form than vogue. Thus, in this study, this researcher tried to suggest solution scheme through the development of design of knit wear to supplement the form defect of middle-aged women. This researcher tried to develop the design of knit wear to supplement the form defect of middle-aged women, after examining the theoretical background of knit wear, the bodily and mental feature of middle-aged women. Internal and external knit wear brand that middle-aged women prefer as the scheme for solving the problematic form of middle-aged women with knit wear. As the result first, to see the present situation of inland production enterprise of knit wear, almost all the brand companies are concentrating energies on widening age class. Second, middle-aged women become far off from the form which is regarded ideal form in modern society. Third, result that this researcher examined the brand of knit wear of middle-aged women is as follows : MORADO, Cartknit, Escalier. And, in foreign knit wear brand, ST John, Missoni, ESCADA. Fourth, as the result that this researcher did work manufacture for the supplement of form defect of middle-aged women, it has practical and active side, and off-time has high-class and elegant refined beauty.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1993년도 학술논문발표회 논문집 제12권 1호
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• pp.169-173
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• 1993

In this paper, the features extraction of reflected signals from various type of defects existing in the solid has been studied by Wiener filtering technique. In this experiment, three types of the defect have been considered; a flat cut, a angular cut and a circular hole. All of the defects have the same size, 20mm in diameter and have been located at 45mm in depth from the aluminum surface. In the result of the experiment, it has been found that the wiener filtering technique used for features extraction from the reflected signal corresponding to each defect have been very effective for defect classification.

• Journal of Welding and Joining
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• 제14권6호
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• pp.37-47
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• 1996

An ultrasonic testing uses the directivity of the ultrasonic wave which propagates in one direction. The directivity is expressed as the relationship between the propagate direction and its sound pressure. The directivity of ultrasonic wave is related to determination of testing sensitivity, scanning pitch and defect location. This paper investigated the directivity of ultrasonic wave, which scattered from slit defect located in heat-affected zone (HAZ) in butt joint using visualization method. The directivity of shear waves scattered from slit defect were different according to probe direction (far defect, near defect) and probe position (forward movement, maximum echo position, backward movement). The difference of directivity of reflection wave was existed between 2 MHz and 4 MHz angle probes. In the case of 2 MHz angle probe, the directivity of reflection wave was appeared sharp form because of the relation wave length and defect size.

• Carbon letters
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• 제16권3호
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• pp.198-202
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• 2015

Carbon-supported Pt catalyst systems containing defect adsorption sites on the anode of direct methanol fuel cells were investigated, to elucidate the mechanisms of H₂ dissociation and carbon monoxide (CO) poisoning. Density functional theory calculations were carried out to determine the effect of defect sites located neighboring to or distant from the Pt catalyst on H₂ and CO adsorption properties, based on electronic properties such as adsorption energy and electronic band gap. Interestingly, the presence of neighboring defect sites led to a reduction of H₂ dissociation and CO poisoning due to atomic Pt filling the defect sites. At distant sites, H₂ dissociation was active on Pt, but CO filled the defect sites to form carbon π-π bonds, thus enhancing the oxidation of the carbon surface. It should be noted that defect sites can cause CO poisoning, thereby deactivating the anode gradually.

• The Journal of Advanced Prosthodontics
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• 제3권2호
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• pp.106-109
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• 2011

Oral cancer treatment involves the surgical removal of all or part of the maxilla, leaving the patient with a defect that compromises the integrity and function of the oral cavity. The postoperative restoration of esthetics, deglutition, and speech shortens recovery time in the hospital and expedites the patient's return to the community as a functioning member. The surgical obturator is the proven treatment option in such situations. This article describes a simple technique to fabricate a surgical obturator that restores patient's original dentition and facial and palatal tissue form. The obturator fabricated with this technique utilizes the vacuum formed index of patient's original tissue form and duplicated partly in heat and partly in auto polymerizing acrylic resin. Duplication of the original tissue form helps patient to minimize the immense physiological trauma immediately after the surgical resection. The obturator fabricated with this technique supports soft tissues after surgery and minimizes scar contracture and disfigurement, and thus may have a positive effect on the patients' psychology.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.637-642
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• 2011

Rails are subjected to damage from rolling contact fatigue, which leads to defects such as cracks. Rolling contact fatigue damages on the surface of rail such as head check, squats are one of growing problems. Another form of rail surface damage, known as "Ballast imprint" has become apparent. This form of damage is associated with ballast particles becoming trapped between the wheel and the surface of rail. These defects are still one of the key reasons for rail maintenance and replacement. In this study, we have investigated whether the ballast imprint is an initiator of head check type cracks and effect of defect size using Finite element analysis. The FE analysis were used to investigate stresses and strains in subsurface of defects according to variation of defect size. Based on loading cycles obtained from FE analysis, fatigue analysis for each point was carried out.

• 한국조경학회지
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• 제25권3호
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• pp.1-11
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• 1997

This study aims to estimate the relative importance of quality management items through the defect analysis in the landscape construction process. The RIQMI are decided by the defect coefficient and it's cause weight. The defect items in the landscape construction process were classified by 56 items based on the classification form of '96 landscape architectural construction standard and the cause pattern were categorized 4 types as design, material, construction, and environment factors. To analyze the defect coefficient and the aucse weight by defect, the researcher surveyed the questionnaires on the 103 engineers and the 31 experts on the landscape architectural construction. The result of this study are as follows. The relative importance by facilities pattern turn out to be much higher construction, material fator than design. environment factor in wood facilities, paving facilities, and steel facilities, the RIQMI is very high in timber crack, timber vending, faulty of timber against decay, welding faulty of steel facilities in material factor, and timber crack, faulty of timber against decay, finish faulty of steel facilities, welding faulty of steel facilities in construction factor.

• 대한기계학회논문집A
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• 제40권7호
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• pp.647-652
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• 2016

유도초음파를 활용한 비파괴검사기법은 장거리 배관 검사에 많이 활용된다. 장시간 사용에 따라 배관에는 표면 부식과 같은 형태의 결함이 주로 발생한다. 표면 부식형 결함의 경우 장거리 유도 초음파 검사 기법을 활용한 신호 해석에 어려움이 있다. 상반 정리는 복잡한 수학적 표현을 간단히 나타내주는 기법으로 잘 알려져 있다. 상반 정리는 평판, 반무한체의 산란 문제를 해결하는데 이미 적용된 바가 있지만 원통형 구조물에서는 적용된 사례가 없다. 이 논문에서는 배관 진단을 위해 상용 장비에서 많이 사용되는 비틀림파의 산란 신호를 상반 정리를 적용하여 해석하였다. 산란 신호는 상반 정리를 활용하여 산란 체의 형태와 위치에 따라 단순한 닫힘 해로 표현하였다. 타원형 결함과 사각 결함의 폭과 깊이 변화에 따라 주파수 별로 발생되는 산란 신호가 계산되었으며, 주파수 증가에 따른 주기적인 결과를 나타내는 것을 확인하였다. 산란 신호 해석을 위한 닫힘 해는 결함의 크기를 정량적으로 해석하는데 중요한 역할을 할 것으로 기대된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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• pp.155-156
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• 2018

Apartment houses are now a popular form of general housing, and the construction techniques and materials quality used to construct apartments are also continuously evolving as if they were representative. However, issues concerning flaws are constantly being reported in the press. This study attempts to analyze the trend of conflicts related to defects and to analyze the types of defects received in the apartment building, to suggest the development of the integrated defect management system, and to develop the construction based on the development of the system.