• 제목/요약/키워드: resultant

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계단 하강 시 성별차이와 중량 변화가 하지역학에 미치는 영향 (Effect of gender difference and change of load on lower extremity kinetics in step descent)

  • 현승현
    • 한국인터넷방송통신학회논문지
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    • 제23권1호
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    • pp.109-116
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    • 2023
  • 이 연구의 목적은 계단 내리기 시 성별과 중량차이가 하지역학에 미치는 영향을 분석하는 것이다. 건강한 남성 10 명과 여성 10 명이 참여하였다. 계단 내리기 동작은 중량 변화(체중의 0%, 10%, 20%, 30%)에 따라 영상분석법과 지면반력 시스템을 이용해 분석하였다. 골반의 최대 합성속도에서 성별(남성>여성)과 중량변화(30%, 20%, 10%> 0%)에 따라 서로 차이가 있는 것으로 나타났으며, 성별과 중량 간 상호작용이 나타났다(중량>성별). 계단 내리기 동안 성별의 주효과는 초기 접촉 단계에서 남성보다 여성이 더 감소된 다리길이를 보였다. 또한, 남성보다 여성에게서 더 굴곡된 엉덩, 무릎관절 각도와 발목관절 각도의 저측 굴곡형태가 나타났다. 운동역학 변인에서, 계단 내리기 시 성별의 주효과는 남성보다 여성이 더 증가된 좌우 지면반력과 다리강성을 보였다. 결론적으로 여성들이 계단 내리기 동안 엉덩 관절의 운동 범위와 함께 합성이동속도를 감소시켜 중량을 성공적으로 수용한다는 것을 발견하였다. 반면 남성들은 중량수용과 운동량을 제어하기 위해 좌우 및 수직지면반력, 그리고 다리강성을 더 증가시킨다.

하이드로 인탱글드 부직포의 역학특성에 관한 연구 (Studies on Mechanical Performance in Hydro-entangled Nonwovens)

  • Kim, Han-Seong;B. Pourdeyhimi
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2003년도 봄 학술발표회 논문집
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    • pp.119-121
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    • 2003
  • Hydroentanglement describes a versatile process for manufacturing nonwoven fabrics using foe, closely speed, high-velocity jets of water and entangles loose arrays of fibers. The resultant fabrics rely primarily on fiber-to-fiber friction to achieve physical integrity and are characterized by relatively high strength, flexibility, and conformability. These technologies can use efficiently the majority of all types of fibers and produce fabrics that could achieve properties equivalent to reverts. (omitted)

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Development of spherical crystallization technique and its application to pharmaceutical systems

  • Kawashima, Yoshiaki
    • Archives of Pharmacal Research
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    • 제7권2호
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    • pp.145-151
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    • 1984
  • A novel agglomeration technique, termed "Spherical Crystallization Process", which can transform directly the fine crystals produced in the crystallization or the reaction process into a spherical shape was developed. By this technique, needle like crystals such as salicylic acid were transformed into free flowing and directly compressible agglomerates. Sphericaly agglomerated aminophyline crystals were obtained directly from the reaction system, which could reduce the preparation processes, e. g. synthesis, crystallization and agglomeration, into only one step. Sodium theophyline monohydrate agglomerates were prepared by salting out, the rate process of which was described by a first order kinetics. Agglomerated crystals of ndw complex of indo-methacin-mepirizole were prepare with this technique; an improved therapeutic effect of the resultant crystals was expected. expected.

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The Quotient of Absorbed Dose and the Collision Part of Kerma for Photon Beams

  • Jun, Jae-Shik;Loevinger, Robert
    • Journal of Radiation Protection and Research
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    • 제5권1호
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    • pp.7-10
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    • 1980
  • With the conceptual definition of the quotient(${\beta}$) of absorbed dose and the collision part of kerma for photon beams, the procedure of computing ${\beta}$ is briefly described. A series of calculations of ${\beta}$ was carried out for photons of 0.4, 0.5, 1 and 2 MeV in polystyrene, carbon, air and aluminum. Resultant values are tabulated and evaluated.

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Effect of Nano-sized Silicas in HPDLC Based on PUA

  • Kim, Eun-Hee;Woo, Ju-Yeon;Kim, Byung-Kyu
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.1212-1215
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    • 2004
  • Diffraction modes of holographic grating were fabricated with polyurethane acrylates(PUA). Two types of silica (AEROSIL 200 and AEROSIL R812) were added to reduce the shrinkage of polymer matrix. It was founded that shrinkage of PUA composite film was reduced with the addition of silica. HPDLC based PUA/silica composite also showed high diffraction efficiency. The morphology of the resultant gratings was analyzed by using scanning electron microscopy(SEM) and Tg of the polymer matrix by dynamic mechanical thermal analysis(DMTA).

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SOME REMARKS ON EISENSTEIN'S CRITERION

  • Woo, Sung-Sik
    • 대한수학회논문집
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    • 제23권4호
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    • pp.499-509
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    • 2008
  • In [4] we showed that a polynomial over a Noetherian ring is divisible by some other polynomial by looking at the matrix formed by the coefficients of the polynomials which we called the resultant matrix. Using the result, we will find conditions for a polynomial over a commutative ring to be irreducible. This can be viewed as a generalization of the Eisenstein's irreducibility criterion.

$45^{\circ}$ Pitched Paddle 형 교반기 내부 유동 해석 (Flow Simulation of a $45^{\circ}$ Pitched Paddle Type Mixer)

  • 장재원;허남건
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2000년도 추계 학술대회논문집
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    • pp.109-114
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    • 2000
  • Mechanical agitation is widely used in industrial process engineering. In the present study, peformed was a numerical simulation on flows in a $45^{\circ}$ Pitched Paddle Type mixer. Through a CFD technique, effects of the position of the impeller on resultant flow pattern was studied. Results of computed torque on impeller to maintain the flow are also compared to the experimental data, and showed good qualitative agreements.

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요추궁 절제술 후 발생한 동정맥루 (Arteriovenous Fistula following Lumbar Laminectomy - A Case -)

  • 오중환
    • Journal of Chest Surgery
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    • 제24권6호
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    • pp.605-609
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    • 1991
  • The formation of postlaminectomy arteriovenous fistula is unusual and the rongeur during discectomy with resultant simultaneous damage to artery and vein is causative. The delay in diagnosis is particularly distressing. The presence of a palpable abdominal thrill or bruit with or without congestive heart failure should results in a high index of suspicion of this entity. Prompt recognition and surgical closure of the post-laminectomy arteriovenous iliac fistula are most important in successful management.

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Characteristics of Korean Alcoholic Beverages Produced by Using Rice Nuruks Containing Aspergillus oryzae N159-1

  • Kim, Hye Ryun;Lee, Ae Ran;Kim, Jae-Ho
    • Mycobiology
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    • 제45권2호
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    • pp.119-122
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    • 2017
  • Herein, nuruks derived from non-glutinous and glutinous rice inoculated with Aspergillus oryzae N159-1 (having high alpha-amylase and beta-glucosidase activities) were used to produce Korean alcoholic beverages. The resultant beverages had enhanced fruity (ethyl caproate and isoamyl alcohol) and rose (2-phenethyl acetate and phenethyl alcohol) flavors and high taste scores.

EVA로 Blending된 Polypropylene Fiber의 염색성에 관한 연구 (A Study on the Dyeing Property of EVA Blended Polypropylene Fiber)

  • 장철민;임상규;김삼수;손태원;서말용
    • 한국염색가공학회지
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    • 제10권5호
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    • pp.13-18
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    • 1998
  • Polypropylene-ethylene/vinyl acetate copolymer (PP-EVA) blends were prepared by mechanical blending using relatively semi-crystaline ethylene-vinyl acetate copolymer and polypropylene. In order to obtain dyeable PP fiber, PP-EVA blends were prepared using below 10wt.% of EVA and formed a filament by the melt spinning method. The resultant fibers had tensile strengh of 2∼3g/d, elongation of 330∼600%, initial modulus of 22∼46g/d, and exhibited markedly improved dyeing property.

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