• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2005년도 추계 종합학술대회 논문집
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• pp.247-253
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• 2005

본 논문은 남자고등학교 태권도선수들의 체력요인에 의한 경기력 결정요인을 규명하기 위한 것이다. 이러한 목적을 달성하기 위하여, 남자고등학교 태권도선수 50명을 대상으로 선정된 8가지의 체력검사를 실시하였다. 구체적으로 이 연구에서 실시한 체력검사는 악력, 제자리높이뛰기, 윗몸앞으로 굽히기, 윗몸일으키기, 눈감고 외발서기, 10m 왕복달리기, 52m 달리기, 1600m 달리기이다. 이들 체력요인 측정결과를 토대로 요인분석 방법을 적용하여 요인구조를 분석하였다.

• 한국산업융합학회 논문집
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• 제13권2호
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• pp.77-84
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• 2010

Recently, the concept of structural design against instability has been proposed in the chassis parts. The design considerations of lower control arm of chassis parts under the buckling and durability strengths are the general. More precisely, this paper considers a specific application and associated optimization problem for two strengths, where the design variables are the physical or geometric dimensions for skins and stiffeners. The objective is the minimization of the total weight, while optimization constrains involve reserve or improve factors for the buckling and durability strengths. The most important features are related to the numerical simulations for the estimation of buckling factor and their sensitivities by means of nonlinear and linear finite element analyses. The bucking and durability strength analyses, and the morping geometries are directly included in the optimization problem and the modified design is formulated. As a result, the optimal structure with stable behavior is obtained or increases the buckling and durability strengths of parts. Most of design problems for structures exposed to elastic instability can be formulated and solved.

• 대한물리치료과학회지
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• 제8권1호
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• pp.821-831
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• 2001

Motor ability were hypothesized to be major factors that may have an influence on IADL(instrumental activities of daily living). The purpose of this study was to investi gate the effect of motor ability of elderly on IADL. This study consisted of forty eight elder male and ninety elder female. The subjects were selected from L, S, Y-institution in kyoung ki do. The average age of elder male and female was 73.81, 71.38 years. The data were analyzed with t-test, repeated measurement, correlation test, regression test, using SPSS PC+ and MINITAB program. The measurement item of motor ability was muscle strength(left, right- grip strength), flexibility(sitting trunk flexion, trunk extension, leg raising while in a standing position), agility(whole body reaction test, standing up), power(sargent jump), balance (stork stand). IADL was measured with Philadelphia Geriatric Center IADL. The result of this study were the following : 1. The factor of significant difference of between elder male and female was muscle strength, flexibility, power but no significant difference was agility, balance. 2. Between IADL of elder male and female was no significant difference. 3. Correlation of IADL and Motor ability of elder male had effect on muscle strength and power, agility. Correlation of Body composition and Motor ability of elder female had effect on muscle strength and power, agility. As a result of this study, optimal motor ability of elder male and female had improved IADL. In addition to, this result of this study, it can suggested the consideration of the Health promotion program for elderly.

• 펄프종이기술
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• 제45권6호
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• pp.30-35
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• 2013

To conserve wood resources for papermaking, chemical compositions of the hemp (Cannabis sativa L.) bast fiber cultivated in Korea such as holocellulose, ${\alpha}$-cellulose, lignin, alcohol-benzene extractives, hot and cold water extractives, and ash contents were investigated to manufacture the specialty packaging paper effectively. Significantly very low klason lignin content of 3.3% was accomplished by removing of the outer shell of bark. Laboratory soda pulping method which is very useful for the nonwood fiber was adapted, and it was found that there was no significant difference in both kappa number and H-factor between 25% and 30% NaOH charge. Hemp pulp cooked with the laboratory digester in 25% NaOH at $170^{\circ}C$ were mixed together with the wood pulp(NBKP:LBKP=1:1) in order to find the optimum mixture ratio which exhibited acceptable paper strength properties such as tensile index, burst index, and tear strength. When 10% of hemp soda pulps was mixed with 90% of wood pulps comprised of SwBKP and HwBKP (1:1), all physical strength increased significantly. The physical strength decreased as the amount of hemp pulp increased because the cell wall of bast fiber is very thick which causes low conformability and low fiber-fiber bonding. These results showed that paper made of hemp-wood pulp can be used for the specialty packaging paper which requires both the characteristic surface properties and the high physical strength of hemp fiber.

• 패션비즈니스
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• 제2권4호
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• pp.93-101
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• 1998

Knit products which had been limited only to underwear, recently became popularized, fashionized and highly classified covering even outer garments such as sportswear like golfwear, woman's dress, and man' s suit. As fashion cycle is getting shorter and the more a nation advanced prefers knit to woven fabrics knit industry has a very bright prospect, particularly woman's knit which is sensitive to fashion can be said as a fashion product with high value added. This study is to grasp the physical properties of stitch which are fundamental to the development of knit products. For this purpose, 2/20s of 100% wool were woven by the author of this study to basic plain stitch, rib stitch, varied transfer stitch, and float stitch on a SEMASEIKI cross knitter 7G to test the physical properties, and the result was as follows; 1. As for the relation between knit stitch and rate of extension recovery, rate of extension recovery was higher in the course direction than in the wale direction of three stitches except transfer stitch; rib stitch showed the highest rate of extension recovery in the course direction while float stitch showed the highest rate of extension recovery in the wale direction. 2. As for the relation between knit stitch and bursting strength elastic rib stitch showed higher bursting strength to indicate elasticity is an important factor of bursting strength and float stitch showed higher bursting strength too to indicate that the floating yarn on the surface plays a role of support. 3. As for the relation between knit stitch and air permeability perforated transfer stitch showed the lowest air permeability to prove that the size of perforation affects on the air permeability a great deal. 4. As for the relation between knit stitch and warmth retaining rib stitch through two lined needle bar showed the highest degree. The reason the warmth of perforated transfer stitch didn't decrease much was because the perforation wasn't big enough and content of air increased from the unevenness of the perforated parts through stitch variation. Based upon this result, each stitch can be characteristically summarized as follows; plain stitch showed a stable condition of knit cloth in four kinds of physical property test. And rib stitch is proper to tighten the edge of sleeve or clothe making use of its excellent extension recovery and to make socks for the highest bursting strength and warmth retaining. In the case of transfer stitch, seasonable designs can be taken by controlling the size of loop. Considering the pleasantness, underwear should be made of stitches with good air permeability float stitch was revealed to have color and pattern effects and a great bursting strength. This study has limitations in the aspect that it dealed with a small part of various knit stitches and the items of physical property test were not enough. The author of this study hopes that further studies would make deeper understandings about knit stitch based on more varied stitches and physical property tests ultimately to contribute to the development of fashionable designs proper to maximize the usage, function and originality.

• Journal of Radiation Protection and Research
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• 제15권2호
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• pp.7-16
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• 1990

알우미나, 실리카겔, 제오라이트 3A, 카오린 그리고 나트륨-벤토나이트에 대한 방사성코발트 및 루테늄 흡착을 수소이온농도, 핵종 농도 그리고 이온강도를 함수로 고찰하였다. 토양에 대한 코발트 및 루테늄의 지연계수는 공극율 측정으로 결정하였다. 코발트 및 루테늄의 가수분해 분자종은 물리적 흡착반응으로 고체 표면과 상호작용한다. 코발트 및 루테늄의 후로인드릿히 흡착 등온식은 직선이다. 코발트 및 루테늄의 흡착은 이온강도의 증가에 따라 감소한다. 지연계수에서 공극율 증가효과는 분배계수의 증가효과와 반한다.

• Elastomers and Composites
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• 제32권1호
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• pp.20-28
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• 1997

This study have Investigated the effect of various factors related to the physical properties of vulcanizated rubber compounds. rubber type, carbon black type and carbon black loading were selected as main factors and evaluation were tested by tables of orthogonal arrays with 3 factors and 3 levels. rubber types have affected cure time, tensile strength, and $T_g$ as main factor and carbon black loading have affected viscosity, scorch time, maximum torque, hardness, 300% modulus, rebound, heat build-up, $0\;&\;60^{\circ}C$ tangent delta, PICO and CUT/CHIP loss as main factor but the effects of carbon black type have affected only bound rubber content.

• 자원환경지질
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• 제23권4호
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• pp.411-424
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• 1990

Mechanical, physical and petrographic properties of seventeen marble specimens collected from ten marble mines in Korea were investigated. Studied marbles were mainly composed of calcite, dolomite, and various amounts of serpentine, tremolite, olivine, quartz and opaque minerals. Complete and sutured textures were dominant. Compressive strength measured normal to the bedding plane is larger almost two times than that measured parallel to the bedding plane. From the results of Shore hardness test on marbles, water content was an important factor to decrease Shore hardness values. Engineering geological properties, especially, compressive strength, Young's modulus, wear resistance and water absorption could be controlled by the presence of quartz, and the type of marble texture. Water absorption-porosity, compressive strength-Young's modulus, and impact strength index-Los Angeles abrasion couples show good correlation. According to the comparative utility as commercial stone, it could be concluded that marbles from the Banglim mine, Songbo mine, Kwangdeok mine and Bongjeong mine were superior to that of other studied marbles.

• 통합자연과학논문집
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• 제12권2호
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• pp.29-34
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• 2019

In dental resin cement studies, viscosity is also an important factor in the adhesion of tooth defects and implants. This study used BisGMA and HPMA as the main ingredients, triethylene glycol dimethacrylate (TEGDMA) as a diluent, and benzoyl peroxide (BPO) as a photoinitiator. The physical properties of graphene oxide used as an additive for functionality were evaluated, and its use as a dental resin cement material was investigated.The rupture strength has the tendency to increase along with the increase of the ratio of graphene oxide that was added, which seemed to reflect the effect of the high strength property of graphene oxide. The flexural strength also has the tendency to increase when about 0.5% of graphene oxide was added the same as the increase of rupture strength.When graphene oxide was added, according to viscosity use, the utilization as high-quality dental resin cements will increase.

• 한국산업융합학회 논문집
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• 제27권3호
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• pp.619-627
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• 2024

By analyzing the structure of the currently used Lead Tab tape structure, the outermost layer, low-temperature fusion functionalized olefin, was composed of pp base. To determine whether this could be used as the outermost layer of tab tape, the adhesive strength to metal foils such as copper and aluminum was measured and the adhesive strength was compared with commercially available functionalized olefin. When chlorine was grafted onto PP among the PP used in the composition, the average adhesive strength was similar to that of commercially available LT200T and superior to RE140R and LE320V. The maximum adhesive strength exceeded that of LE200T. When it comes to solvents, xylene has been shown to be better than any other. Physical methods such as substitution of other monomers, switching of additives or let-down hardly changed the adhesion of grafted PP, and the selection of PP is an important factor in preparing functional polymers.