• 제목/요약/키워드: Relaxation Method

검색결과 960건 처리시간 0.026초

면편성물의 방염처리에 의한 방염성과 물성변화 (Changes of Flame Retardant and Physical Properties of Cotton Knitted Fabrics after Flame Resistant Treatment)

  • 지주원;송경근
    • 한국의류산업학회지
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    • 제5권3호
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    • pp.273-282
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    • 2003
  • Effect of fixation methods and relaxation treatment on the flame retardant(FR) and physical properties of MDPP/HMM treated cotton weft-knitted fabrics were studied. Combination of four different fixation methods - relaxation, swelling agent treatment, pad dry cure fixation, and wet fixation - were applied to flame retardant finish of cotton weft-knitted fabric with MDPP/HMM. As the results, 1. Swelling agent and wet fixation method helps FR agent penetrate the fiber efficiently. Interlock showed relatively higher values of LOI than single jersey. 2. Interlock showed relatively higher values of bending rigidity(B), shear rigidity(G) and coefficient of friction(MIU) than those of single jersey before and after flame resistant treatment. 3. An increase in internal volume of cotton fiber by relaxation treatment increased the bending rigidity(B), shear rigidity(G) and compressional energy(WC). 4. The cotton weft-knitted fabric treated wet fixation, which crossliked FR agent efficiently, showed higher bending rigidity, shear rigidity(G) and lower compressional energy(WC). Retention of swelling ability of cotton weft-knitted fabrics treated with MDPP/HMM, which increased the internal volume of cotton weft-knitted fabric, showed lower bending rigidity.

Experimental Verification of Relaxation Effect of Tree Planting using Eye Movement Tracking

  • Lee, Ju-Young;Sawada, Takuji;Fujii, Eijiro
    • 한국조경학회:학술대회논문집
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    • 한국조경학회 2007년도 Journal of Landscape Architecture in Asia Vol.3
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    • pp.89-93
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    • 2007
  • In the Japanese garden, a unique planting design has been used to improve visual harmony with the surrounding landscape by planting plants around the objects that are not harmonious with surrounding landscape. In this study, physiopsychological effects of plants caused by a traditional planting skill used in Japanese garden was verified in terms of visual relaxation using eye movement recording and semantic differential method. A total of fourteen Japanese volunteers(seven male and seven female) who have normal vision(aged $21{\sim}28$) participated as subjects. Experiment was carried out in the sealed room of Chiba University in Japan. Four different types of scenery models were presented which were created by combination of the three landscape factors of the surrounding background, the object that disturbs visual harmony, and the trees planted for improving visual harmony with the surrounding landscape. In the results, significantly more gaze fixations were measured on the trees than on the object and higher values in positive feelings were recorded for the stimuli with proper planting combination. Our results indicated that proper tree planting can cause physiopsychological relaxation by improving visual harmony with the surrounding landscape and provided new evidence for supporting scientific validity of the traditional planting skills.

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응력완화시험에 의한 도토리 전분겔의 물성론적 모형 분석 (Rheological Model Analysis of Acorn Starch Gels by Stress Relaxation Test)

  • 김영아;이혜수
    • 한국식품조리과학회지
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    • 제5권1호
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    • pp.49-52
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    • 1989
  • 도토리 조전분겔과 정제전분겔에 대하여, 변형의 정도를 달리한 응력완화시험을 실시하였다. 그 결과 초기응력($\sigma$$_{o}$ )은 변형정도에 무관하게 항상 정제전분겔이 큰값을 나타내었고, 평형응력($\sigma$$_{e}$)은 조전분겔이 더 큰 값을 보여주었다. 그러나 초기응력에 대한 평형응력의 비($\sigma$$_{e}$/$\sigma$$_{o}$ )는 60%변형의 경우에 최소값을 나타내었다. 응력완화곡선의 물성론적 모형 분석은 축차잔차법을 사용하였다. 60%변형의 경우, 조전분겔은 7-element 정제전분겔 은 5-element generalized Maxwell model로 분석되었고, 45%변형의 경우에는 조전분겔은 5-element, 정제전분겔은 3-element model로 표현할 수 있었다. 즉 조전분겔에 비해 타 성분들이 좀 더 제거된 정제전분겔이 보다 더 단순한 모형으로 분석되었다.

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모의 생체조직의 표면온도 조건에 따른 근육이완 특성에 관한 연구 (A Study on the Characteristics of Muscle Relaxation according to the Temperature Condition at the Surface of Imitational Biological Tissue)

  • 고동국;이찬우;김민수
    • 한국기계기술학회지
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    • 제20권6호
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    • pp.770-775
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    • 2018
  • In this study, the characteristics of muscle relaxation were analyzed by the experimental and numerical method. A skin tissue was produced by imitational biological tissue using the agar powder, saline solution and sugar. The tissue was exposed to three types of wavelength-blue visible radiation(410 nm), red visible radiation(635 nm), and infrared ray(830 nm). The temperature results along the depth of tissue were measured according to the variation of light wavelength and irradiation time. The temperature change of the tissue shown up similar pattern regardless of the light wavelength kinds. The wavelength of infrared ray penetrated strongly into tissue between 3.2 mm and 11.4 mm. Also, the temperature change with the irradiation time was small, and the temperature value of the infrared ray was the largest. As a result, the muscle relaxation will occur mainly at the infrared wavelength.

주택에서의 각 생활행위에 대응하는 조명환경에 관한 실험연구 (An Experiment on Lighting Environment for some Behavior in Housing)

  • 이선영
    • 한국주거학회논문집
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    • 제16권4호
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    • pp.65-71
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    • 2005
  • The present study performed subjective evaluation experiments using slides and scale down models in order to propose guidelines for lighting environment desirable for each behavior in the house. The evaluation measure was composed of 20 mood items and 15 behavior items. As for experiment methods, the slide experiment used SD method, and the scale down model experiment used Scheffe's paired comparison. The results of this study are as follows. 1) Desirable lighting environment for working and talking is active atmosphere. 2) Lighting environment desirable far relaxation is to heighten lighting contrast using candescent lamps and local lights. In other words, active atmosphere, which is desirable for working and talking, is not desirable for relaxation. 3) Lighting for working requires bright illuminance and high color temperature(6000k). 4) Lighting for relaxation requires somewhat low brightness regardless of color temperature. If the light is bright it is better to use lamps of low color temperature. 5) for conversation, bright illuminance is more desirable than dark one, and the most adequate color temperature is 4000K.

PCB 설계를 위한 Auction 알고리즘의 수학적 등가와 $\varepsilon$-이완법에 관한 연구 (A Study on the Mathematical Equivalence and $\varepsilon$-Relaxation of Auction Algorithm for PCB Design)

  • 우경환;이용희;임태영;이천희
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2000년도 하계종합학술대회 논문집(2)
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    • pp.213-216
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    • 2000
  • Minimum-cost linear network flow problems could be transformed with equal to assignment problems. Traditional method to solve the linear network flow problems are improved source-cost by transform the simple cycle flow. Auction algorithm could be applied to same element using the initial target price and dispersion calculation. Also, each elements are obtained by $\varepsilon$-relaxation methods. In this paper we proposed; 1)minimum-cost flow problem, 2)minimum-cost flow problem by the mathematical equivalent and 3) extraction $\varepsilon$-relaxation & expand transfer problem with minimum-cost flow. It can be applicant to PCB design by above mentioned.

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Mood Suggestion Framework Using Emotional Relaxation Matching Based on Emotion Meshes

  • Kim, Jong-Hyun
    • 한국컴퓨터정보학회논문지
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    • 제23권8호
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    • pp.37-43
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    • 2018
  • In this paper, we propose a framework that automatically suggests emotion using emotion analysis method based on facial expression change. We use Microsoft's Emotion API to calculate and analyze emotion values in facial expressions to recognize emotions that change over time. In this step, we use standard deviations based on peak analysis to measure and classify emotional changes. The difference between the classified emotion and the normal emotion is calculated, and the difference is used to recognize the emotion abnormality. We match user's emotions to relatively relaxed emotions using histograms and emotional meshes. As a result, we provide relaxed emotions to users through images. The proposed framework helps users to recognize emotional changes easily and to train their emotions through emotional relaxation.

$(Sr_{1-x}Ca_x)TiO_3$세라믹 박막의 미세구조 및 특성 (Microstructure and Properties of $(Sr_{1-x}Ca_x)TiO_3$Ceramic Thin film)

  • 김진사;이준웅
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제50권10호
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    • pp.504-508
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    • 2001
  • The$(Sr_{1-x}Ca_x)TiO_3$(SCT) thin films are deposited on Pt-coated electrode $(Pt-TiN /SiO_2Si)$ using RF sputtering method at various deposition temperature. The crystallinity of thin films was increased with increased of deposition temperature n the temperature range of 200~500 $[^{\circ}C]$. The capacitance changes almost linearly in temperature ranges of -80~+90$[^{\circ}C]$. All SCT thin films used in the study the phenomena of dielectric relaxation with the increase of frequency, and the relaxation frequency is observed above 200[kHz]. V-I characteristics of SCT thin films show the increasing leakage current with the increases of deposition temperature.

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Surface Relaxation Effect on the Magnetism of Fe Overlayer on Cr (001)

  • Kim, I.G.;Lee, J.I.;Jang, Y.R.;Hong, C.S
    • Journal of Magnetics
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    • 제1권1호
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    • pp.9-13
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    • 1996
  • The effects of surface relaxation on surface and interface magnetism in Fe/Cr (001) are investigated using the highly precise all-electron total-energy full-potential linearized augmented plane wave method. The Fe-Cr interlayer spacing is deter-mined by total-energy calculation and it is found to be relaxed downward by 18%. For the relaxed system, the magnetic moment of surface Fe is highly suppressed to be $1.72\mu_B$compared to the unrelaxed case ($2.39\mu_B$). This reduction of magnetic moment is considered as a result of the enhanced hybridization between Fe-d and Cr-d states, which can be seen from the calculated density of states. This work suggests the importance of effect of relaxation to the surface and interface magnetism in Fe/Cr system.

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Lagrangian Relaxation 방법에 기초한 전기 기동 정지 계획의 구현 (Implementation of a Lagragian Relaxation Based Unit Commitment Scheduling)

  • 남영우;김성수;정해성;한태경;박종근
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 하계학술대회 논문집 C
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    • pp.1003-1005
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    • 1998
  • We present the implementation of a Lagrangian Relaxation based large scale thermal Unit Commitment problem. The problem is decomposed into thermal subproblem by using Lagrangian multipliers. The thermal subproblem is solved by using dynamic programmmg. we perform a numerical test using the thermal system of KEPCO over a week (168 hours) period. The programming language used for the test program is C. The result is compared with the priority list method.

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