• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2004년도 추계학술대회 논문집
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• pp.98-107
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• 2004

The objectives of this research are to establish the criteria of peel occurrence considering the shape of bond terminus and to compare the strength properties of some adhesive joints. The criteria of feel occurrence at the bond terminus was suggested. Peel loads of some adhesive joint(butt joint, T -shape specimen, single lap joint) were determined from tensile tests. Principal stress distributions of these joints were determined from finite element method analysis. Then, peel occurrence was estimated with intensity of stress singularity ' $K_{prin.}$' when the terminus shape was square, with average principal stress when the terminus shape was rounded. The conclusions are summarized as follows; (1) In the non-filleted model(e.g., butt joint, T-shape specimen), principal stress shows singularity at the bond terminus, intensity of stress(principal stress) singularity ' $K_{prin.}$&apso; can use as the criteria of peel occurrence at the bond terminus. (2) In the filleted model(e.g., single lap joint), principal stress doesn't show singularity at the bond terminus. Average principal stress can use as the criteria of peel occurrence at the bond terminus.'t show singularity at the bond terminus. Average principal stress can use as the criteria of peel occurrence at the bond terminus.

• 한국공작기계학회논문집
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• 제14권5호
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• pp.62-73
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• 2005

The objects of this research are to establish the criteria of peel occurrence considering the shape of bond terminus and to compare the strength properties of adhesive joint of different three type such as butt joint, T-shape, and single lap Joints. The criteria of peel occurrence at the bond terminus was suggested. Peel loads of three type adhesive joint (butt Joint, T-shape specimen, single lap joint) were determined from tensile tests. Principal stress distributions of these joints were determined from finite element method analysis. Then, peel occurrence was estimated with stress singularity factor$(K_{prin})$ when the terminus shape was square, with average principal stress when the terminus shape was rounded. The conclusions are summarized as follows; (1) In the non-filleted model(e.g., butt joint, T-shape specimen), principal stress shows singularity at the bond terminus, intensity of stress(principal stress) singularity $(K_{prin})$ can use as the criteria of peel occurrence at the bond terminus. (2) In the filleted model(e.g., single lap joint), principal stress has not affected singularity at the bond terminus. Average principal stress$(K_{av})$ can use as the criteria of peel occurrence at the bond terminus.

• Food Science and Biotechnology
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• 제18권6호
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• pp.1545-1547
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• 2009

The fiber-rich fractions including enzyme treated insoluble dietary fiber, alcohol insoluble solid, and water insoluble solid were prepared from the peel of soft ripe persimmon, and to evaluate and compare the yields, proximate compositions, monosaccharide profiles, and functional properties. The results showed that uronic acid was the main sugar followed by glucose, which indicated that all insoluble fibers were mainly composed of pectic substances and cellulose. The presence of xylose and fucose indicated the occurrence of hemicellulose. All fiber-rich fractions were exhibited high yield and functional properties. Thus, the peel of ripe persimmon could be used as fiber supplements.

• 생약학회지
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• 제10권1호
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• pp.13-16
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• 1979

The essential oil composition by means of gas liquid chromatography, and the occurrence and distribution of flavonoid glycosides in leaves, peels and barks of citrus plants native to Je Ju island were investigated. Results indicate that the occurrence of p-cymene, d,l-limonene, linalool, geraniol and linalyl acetate in the essential oils, and of hesperidin in leaves, peels and barks are fairly common to these species.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 추계학술대회 논문집
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• pp.247-250
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• 2005

The need for improved fuel efficiency, weight reduction has motivated the automotive industry to focus on aluminum alloys as a replacement for steel-based alloy. To cope with the needs for high structural rigidity with low weight, it is forecasted that substantial amount of cast components will be replaced by tubular parts which are mainly manufactured by the extruded aluminum tubes. The extrusion process is utilized to produce tubes and hollow sections. Because there is no weld seam, the circumferential mechanical properties may be uniform and advantageous for hydroforming. However the possibility of the occurrence of a surface defect is very high, especially due to the temperature increase from forming at high pressure when it comes out of the bearing and the roughness of the bearing, which cause the surface defects such as the dies line and pick-up. And when forming a extruded aluminum tube, the free surface of the tube becomes rough with increasing plastic strain. This is well known as orange peel phenomena and has a great effect not only on the surface quality of a product but also on the forming limit. In an attempt to increase the forming limit of the tubular specimen, in the present paper, surface asperities generated during the hydroforming process are polished to eliminate the weak positions of the tube which lead to a localized necking. It is shown that the forming limit of the tube can be considerably improved by simple method of polishing the surface roughness during hydroforming. And also the extent of the crack propagation caused by dies lines generated during the extrusion process is evaluated according to the deformed shape of the tube.

• Journal of Biosystems Engineering
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• 제30권1호
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• pp.25-31
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• 2005

There are more than three hundred garlic peeling facilities in Korea and most of them use pressurized air for skin peeling operation. One of the major problems of using air for the peeling operation is the occurrence of excessive bruises on the flesh of peeled garlic which causes easy microbial contamination and shortening of the shelf lift. To reduce the occurrence of bruises during the peeling operation, a new type of garlic peeling system was developed which use pressurized water. In this system, high pressure water jets were used to separate garlic bulbs and to peel the skin of garlic cloves. Six commercial systems of this type had been developed and installed at several locations in Korea. The design and performance of the latest system according to three pressure levels were described in this paper. Peeling efficiency of the system was as high as $64.7\%$ in one cycle of peeling operation by three chambers installed in series. Incorporation of a sorting system based on machine vision and re-circulation of unpeeled and partially-peeled garlic enhanced peeling efficiency by additional $30\%$, resulting in total peeling efficiency of the final products of approximately $95\%$. Peeling capacity of the system was over 400 kg per hour.

• 한국농림기상학회지
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• 제12권2호
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• pp.76-82
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• 2010

본 연구는 '후지'/M.9 재배에 있어 최근 문제시 되는 일소 발생 경감 기술을 비교 분석하기 위하여 3년 (2001~2003) 동안 수행하였다. 일소는 과실 성숙기에 높은 온도와 일사광에 의해 과실 온도가 $40{\sim}45^{\circ}C$에 달할 경우 발생하므로 과실 온도를 효과적으로 줄이는 것이 매우 중요하다. 이에 6월말 이후 흰색 코팅제인 카올린 및 탄산칼슘을 2주 간격으로 4회 처리한 실험과 7월 말에서 8월 중순 사이에 기온이 $31^{\circ}C$ 이상일때 미세살수 한 실험 결과를 분석해 본 결과, 두 실험 모두 일소 발생이 현저하게 감소되면서 과실품질이 향상된 것으로 나타났다. 이는 이들 처리들이 과실과 잎의 온도를 감소시켜서 광합성 능력이 증가했기 때문인 것으로 판단되었다.

• 한국유기농업학회지
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• 제10권3호
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• pp.57-66
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• 2002

온주밀감 마착색 과실을 대상으로 고온 예조를 통해 과피의 착색 증진과 저장성 향상을 위하여 시험한 결과, 고온 예조 처리한 과실은 과피색을 촉진시켰다. 저장중 자연감량은 착색도와 관계없이 20$^{\circ}$ 예조처리 구에서 적었으며 부패과 발생은 3월 중순까지는 20$^{\circ}$ 예조 처리구에서 적었으나, 저장후기인 3월 하순부터는 효과가 없었다. 저장중 가용성고형물과 산함량은 상온 예조보다는 고온 예조구에서 높은 경향을 보였으나 각 처리간에 유의성은 없었다.

• Journal of Chest Surgery
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• 제17권2호
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• pp.257-262
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• 1984

Acute purulent pericarditis, though not common in incidence after introduction of antibiotics, is still potentially life treating isease. Since 1971, we have experienced 14 cases of acute purulent pericarditis with successful treatment. Among these 14 cases, 9 cases were male and they had high occurrence on their third to fifth decades in age distribution. Isolation of causative organisms were obtained in 11 cases through the bacterial culture of infectious source which was mainly pericardial effusion or blood, and the most frequently recovered organism was the staphylococcus aureus. Pre-existing inflammatory disease preceding to pericarditis, named as antecedent disease, were proved in 12 cases, and among which contiguous extension from the intrathoracic infection such as pneumonia or empyema accounted for the majority of antecedent disease. Pericardiocentesis with administration of antibiotics were tried in all cases, but result in recovery in 1 patient only. Remaining 13 cases had persistent picture of pericarditis and necessitated surgical drainage procedure. Ten of these 13 cases were underwent the open pericardial window using a mode of anterior approach in 4 and subxiphoid approach in 6 cases respectively. Two cases of subxiphoid group were reoperated by the anterior interphrenic pericardiectomy, due to insufficient drain of too thick effusion. In remaining 3 cases, anterior interphrenic pericardiectomy was performed initially because of purulent effusion already changed into fibrinopurulent peel with thickened pericardium. Through the experience of this series, we recommended that pericardiectomy should not be reluctant in purulent pericarditis as a initial surgical procedure for advantage of complete removal of infected space and avoidance of late constrictive pericarditis.

• 한국유기농업학회지
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• 제19권3호
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• pp.405-416
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• 2011

본 실험은 '신고' 배 과원에 친환경 자재인 키틴분해미생물 배양액에 님오일, 은나노, 그리고 보르도액을 혼용하였을 경우, 그리고 위 친환경 자재에 합성농약을 살포했을 때 흑성병과 가루까지벌레 방제율, 과실품질 그리고 항산화 물질을 비교 분석하기 위해서 수행되었다. 친환경 자재를 이용한 무농약 처리구인 키틴분해미생물+님오일은 잎과 과실의 흑성병 감염율을 30% 이하로 감소 시켰으나 키틴분해미생물에 은나노나 보르도액 혼용은 높은 감염율을 보였다. 친환경 자재에 합성농약 처리구는 흑성병 감염율을 20% 이하로 감소시켰다. 키틴분해미생물+보르도액 무농약 처리구를 제외하고는 가루깍지 벌레 발생율을 모두 10% 이하로 감소시켰다. 과실품질 특성은 처리구간에 일정하게 나타나지 않았다. 과실 적색을 나타내는 Hunter value a값은 병해충 발생율이 높았던 키틴분해미생물에 은나노나 보르도액을 혼용한 무농약 처리구에서 합성농약 처리구보다 더 높게 관찰되었다. 친환경 자재에 무농약 처리구 과실이 합성농약 과실 보다 과피의 페놀함량을 제외하고 과피와 과육에서 높은 총페놀함량, 플라보노이드 함량, 그리고 항산화활성을 보여주었다.