• 한국전문물리치료학회지
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• 제9권1호
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• pp.53-61
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• 2002

The purpose of this study was to compare the body alignment during standing on level and wedge board. Twenty healthy college students (8 females, 12 males) were evaluated in this study. Diagnostic contourline potographic imaging system (Model JTC-1, Jodang Trading Co.) was used to measure body alignment. Sagittal and frontal plane images were used to analyze the body alignment. The result showed that the cervical and lumbar lordotic curve significantly decreased during standing on wedge board when compared with standing on level. On the other hand, thoracic kyphosis significantly increased during standing on wedge board. There was no significant difference in body alignment according to gender, weight, and height. Clinically, patients with low back pain and severe lordosis may be affected by heel wedge. Further study is needed to identify whether the standing on wedge board can change the body alignment in patients with low back pain and spinal deformity.

• Journal of the Korean Wood Science and Technology
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• 제28권4호
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• pp.56-60
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• 2000

A new porous carbon material "woodceramics" was developed by carbonizing wood or woody materials impregnated with thermosetting resin. Steamed board and non-steamed board were made from thinned small log of Aomori Hiba (Thujopsis dolabrata S. et. Z. var. hondae M.). They were impregnated with phenol resin and sintered in a vacuum furnace at $650^{\circ}C$. In this paper, the manufacturing method of woodceramics and changes of dimension, weight and compressive strength were investigated. The changes of dimension, weight and compressive strength depend on the types of board and density.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1996년도 춘계학술대회논문집
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• pp.291-300
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• 1996

This study is to determine the biomechanical characteristics of Korean. Male 58 and Female 54 were participated for the measurement which was performed by immersion method and reaction board method. Body parts were head with neck, trunk, upper arm, forearm, hand, thigh, leg, and foot. Their volumes were measures by immersion method. Their weight were determined by using Dempster(1995), Drills and Contini(1969) density data. Each center of body part weight were determined by specific posture on the reaction board. The postures were asked to the subject forearm- lifted posture, total let- lifted posture, foot-lifted posture. According to each posture, the center of each part were calculated.

• 한국포장학회지
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• 제4권2호
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• pp.3-11
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• 1998

산화전분을 골판지 구성원지인 표면라이너지와 이면라이너지에 각각 코팅하였으며 산화전분 코팅에 따른 골판지의 물성변화를 조사, 산화전분 코팅의 효과를 분석한 결과는 다음과 같았다. 산화전분의 코팅에 의해 골판지의 수직압축강도 뿐만아니라 파열강도도 동시에 개선될 수 있었다. 골판지의 파열강도는 구성 라이너지의 처리면에 관계없이 일정수준의 도공량에 도달할 때까지 크게 증가하다가 그 이상에서는 더 이상의 증가를 보이지 않았다. 표면라이너지에 처리한 골판지의 경우 도공하지 않은 골판지의 파열강도에 비해 도공량이 $2.32g/m^2$일 때 30.3%가 증가하였고 이면라이너지에 처리한 경우 도공량이 $4.84g/m^2$일 때 36.8%가 증가하였으며 표면라이너지와 이면라이너지 모두 처리한 경우 도공량이 $7.16g/m^2$일 때 39.9%가 증가하였다. 산화전분의 코팅은 골판지 원지의 섬유간 결합을 증가시키는데 기여하고 강직성을 개선시켜 골판지 수직압축강도의 개선을 가져왔다. 구성 라이너지의 처리면에 관계없이 골판지의 수직압축강도는 산화전분 도공에 의해 전반적으로 증가하였는데, 이면 라이너지에 처리한 경우 도공량이 $1.58g/m^2$일 때 11.3%가 증가하였고, 표면라이너지와 이면라이너지 모두 처리한 경우 도공량이 $2.99g/m^2$일 때 11.9%가 증가되어 소량의 산화전분 도공에 의해서도 수직압축강도가 크게 개선되었다.

• 한국ITS학회 논문지
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• 제19권6호
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• pp.74-87
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• 2020

과적차량은 도로 주행환경의 안전을 위협하고 도로구조물의 수명단축에 직접적인 영향을 주는 주요 원인이다. 자중계는 화물차량에 탑재하여 중량을 측정할 수 있는 유일한 장비로, 운전자는 스스로 과적상태를 확인하고 운행 전 상차 시 적재중량을 조절하여 과적을 사전에 예방할 수 있다. 본 연구에서는 과적 적재물 중 골재 및 토사가 전체의 36.55%로 주요 과적적재물로 나타나 이를 주로 운송하는 30대의 건설폐기물 수집·운반차량을 선정하였으며, 자중계의 시범설치 및 원격 모니터링을 수행하여 운행데이터를 수집하였다. 운전자에게 중량을 인지할 수 있는 중량표시 앱을 배포하기 전 1달과 배포한 후 1달 동안 운행데이터를 비교하여 과적 예방효과를 분석하였다. 자중계로부터 제공받은 적재중량을 인지함으로써 과적운행이 6.1%가 감소한 것을 확인하였으며, 운송량을 극대화하면서 단속을 우려하여 원거리로 우회 주행을 할 필요가 없어 운송거리와 시간이 줄어 운송 효율이 높아진 것을 확인하였다.

• International Journal of Industrial Entomology and Biomaterials
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• 제6권2호
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• pp.115-123
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• 2003

Oviposition and egg laying is an important physiological and behavioural event in the life cycle of the silkworm, Bombyx mori (L). Oviposition and egg laying is dependent on a number of intrinsic and extrinsic factors viz., neural, hormonal, environmental, physical, behavioral etc for the perpetuation of population. Although, the virgin female moths have fully developed embryos but active egg laying begins under the influence of mating which provides essential copulation stimulus for oviposition. After mating drastic biochemical changes occurred that incites egg laying under the influence of optimum environmental conditions. Weight of pupae as well as larval density has significant role on oviposition and egg laying behaviour in the silkworm wherein high pupal weight and inadequate rearing space affects not only the biology, morphology and physiology but also the oviposition and egg laying. Surface topography, plane of inclination, mating length, age of male moth, temperature and photoperiod etc has significant effect on reproductive physiology of silkworm. An attempt has been made in this review article to elucidate briefly the works carried out on mating behaviour, direct and indirect copulation stimulus, vitellogenesis, influence of environmental factors besides effect of weight of pupae and or pharate adult and larval density on oviposition and egg laying behavior in the silkworm, B. mori and its significance in silkworm seed production.

• 한국철도학회논문집
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• 제3권2호
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• pp.92-99
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• 2000

Composites are very useful material for light train carbody due to its high specific strength and lightweight characteristics. The composites, called 3-D board, are developed with a special stitching method. In this process, the glass fiber fabrics of skin material and foam core material are stitched together with glass fiber thread. The glass thread in Z-axis turns into FRP form. The conventional delamination problem can be solved with 3-D sandwich structure. In addition, with the lower density of foam, the weight of the panel and the operation expenses can be highly reduced. To evaluate the usefulness of the 3-D board, the double-deck light train carbody is studied. The stress analyses are carried out under various loads and boundary conditions with FEM Code, ANSYS. On comparing with the aluminum carbody, 3-D board carbody can be reduced by about 2 ton for the total weight of carbody.

• Journal of the Korean Wood Science and Technology
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• 제29권2호
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• pp.69-75
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• 2001

우드세라믹은 목재나 목질재료에 페놀수지를 함침한 후 고온에서 소성하여 만든 새로운 다공질 탄소재료이다. 이러한 우드세라믹의 성질은 재료의 밀도에 영향을 많이 받는 것으로 알려져 있다. 본 연구에서는 증기분사를 하지 않은 보드와 증기분사를 1분, 5분, 10분 실시한 보드 등 4가지 타입의 보드를 만든 다음 우드세라믹을 제조하여 증기분사 시간에 따른 우드세라믹의 성질을 검토하였다. 그 결과 우드세라믹의 중량감소율은 4가지 타입 모두 밀도가 증가함에 따라 증가하는 경향을 보였으며, 중량, 길이 및 두께 감소율은 증기분사를 하지 않은 보드로 제조된 우드세라믹이 증기분사를 실시한 보드로 제조된 우드세라믹보다 약간 크게 나타났다. 또한 증기분사를 하지 않은 보드로 제조된 우드세라믹의 휨강도 및 압축강도가 컸으나 증기분사 시간에 따라서는 뚜렷한 차이가 없는 것으로 나타났다.

• The Journal of Korean Physical Therapy
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• 제13권1호
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• pp.161-174
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• 2001

The purpose of this study was to reduce the spasticity of plantarflexion. the subjects of this study were 30 hemiplegic patients with stroke who received of physical therapy in JinJu o o hospital from May to July 2000. the subjects were divided into three groups(FES groups 10, FES + tilt table-wedge board standing groups 10, & tilt table-wedge board standing groups 10). The result were as follow 1. FES therapy was a effective method to reduce the spasticity of plantarflexor. there was a significant difference in modified Ashworth scale(p<.01). there was a significant difference in weight bearing ratio between nonparetic and paretic side(p<.01). 2. Tilt table-wedge board standing therapy was a effective method to reduce the spasticity of plantarflexor to a degree but there was a no significant difference in modified Ashworth scale(p<.05). there was a significant difference in weight bearing ratio between nonparetic and paretic side(p<.01). 3. Tilt table-wedge board standing therapy + FES therapy was a effective method to reduce the spasticity of plantarflexor. there was a significant difference in modified Ashworth scale(p<.01). there was a significant difference in weight bearing ratio between nonparetic and paretic side(p<.01) 4. There was a significant difference in weight bearing ratio between nonparetic and paretic side according to the grade spasticity(p<.01). 5. For normal persons vs hemiplegic patients, there was a significant different in weight bearing ratio between nonparetic and paretic side(experimental subjects 1 p<.01, experimental subjects 2 p<.01, control subjects p<.05).

• 한국포장학회지
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• 제10권1호
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• pp.27-36
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• 2004

Software summarized packaging technology related is needed for low cost and high efficiency in production and packaging design of corrugated board, and in development of these softwares, distribution and packaging environment of one's country must be reflected, well. In domestic occasion, software related to corrugated board packaging dont's exist nearly, and in many industrial fields, the more higher role and importance of packaging in various industrial field is, the more higher necessity of that is. In this study, on the base of preceeding studies (Park, 2001; 2003; 2003), software to optimize board combination that is most importance and sensitivity in composition of cost elements in production and packaging design of corrugated board was developed. This software was composed of input module, output module, database and management module, and calculation module, and efficiency of this software was analyzed on the both sides of sensitivity in design result and effectiveness in a case analyse. In the inward design results having same strength, board combination balance, bursting strength, box weight, and cost were greatly different. Therefore, optimum inward design according to user's design specifications is possible, and in a case analysis for actual products, obtained the more profitable results than before design.