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        검색결과 352

        182.
        2006.09 구독 인증기관 무료, 개인회원 유료
        In this study, numerical analysis of TMD to estimate optimal-design-parameter is investigated using actual excitation, and evaluated by comparing results of numerical analysis and optimal-design-parameter was devised by Soong. It assumed between 1~2 seconds the 1st mode natural period of an aged apartment which has 10~15 stories and then investigated optimal-design-parameter of actual excitation for evaluate optimal frequency ratio and damping ratio according to local site condition. At this time mass ratio was 1% and range of tuned frequency ratio was 0.8Hz to 1.2Hz at intervals of 0.01Hz, and optimal damping ratio was 1% to 14% at intervals of 0.002%. It estimated Optimal-design-parameter was evaluated by numerical analysis according to peak and RMS displacement, acceleration respectively local site. And the result of evaluated respond performance parameter respectively a period was shown low numerical-value than optimal-design-parameter was devised by Soong what is more peak acceleration indicated performance difference of 20% over
        4,000원
        184.
        2005.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In general, water treatment sludge (WTS) had high concentration of heavy metal, thus it made the reuse or recycling of WTS difficult. The optimal solidification conditions for maximum suppression of heavy metal elution from WTS were decided in this study. Under the optimal solidification conditions (i.e., temperature, 320℃; ratio of WTS and MgO, 9:1; solidification time, 1hr), all of heavy metal including aluminum were not detected. Therefore there are no problems for reuse or recycling of WTS which was solidified under the optimal solidification conditions found in the study.
        4,000원
        188.
        2005.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        이 논문은 경계조건에 따른 판구조물의 최적두께분포 변화에 대한 연구결과를 기술하였다. 본 연구에서는 최소화하고자하는 변형에너지를 목적함수로 하고 구조물의 초기 부피 값을 제약조건으로 사용하였다. 판구조물의 두께분포를 표현하기 위하여 쿤이 개발한 조각 면을 이용하였다. 판의 변형에너지를 정확히 계산하기 위하여 퇴화 쉘 요소를 도입하였으며 반복계산을 통하여 최적의 두께분포를 검색하기 위하여 최적화검색기 DOT를 도입하였다. 마지막으로 경계조건에 따른 판의 최적두께 분포에 대한 정량적인 수치해석결과를 제공하기 위하여 정사각형 판을 최적화에 채용하고 그 결과를 자세히 기술하였다.
        4,000원
        189.
        2005.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study was conducted to develop a functional cookie with the addition of a sweet pumpkin powder on a cookie shape, that showed high preference level to all age group and that was very easily to store because of low moisture content, by substituting partially a sweet pumpkin powder for reducing content of wheat flour. This study has produced the sensory optimal composite recipe by making iced cookies, respectively, with each 5 level of Sweet pumpkin powder(X1), sugar(X2), butter(X3), by C.C.D(Central Composite Design) and conducting sensory evaluation and instrumental analysis by means of RSM(Response Surface Methodology). Sensory items showed very significant values in color, appearance, flavor, overall quality(p〈0.05), texture(p〈0.01), and instrumental analysis showed significant values in lightness, redness(p〈0.01), yellowness, spread ratio, hardness(p〈0.05). Also sensory optimal ratio of Sweet pumpkin cookie was calculated as sweet pumpkin powder 81.8g, sugar 116.6g, butter 210.7g, and it was revealed that the factors of influencing cookie aptitude were in order of Sweet pumpkin powder, butter, sugar.
        4,000원
        190.
        2005.09 KCI 등재 구독 인증기관·개인회원 무료
        식·약용버섯 중의 하나이고 β-glucan의 함유로 현대인들에게 관심이 집중되고 있는 꽃송이버섯(Sparassis crispa)의 대량 균사체 증식과 인공재배를 위한 생리적특성을 구명하고자 공시된 4균주에 대해 실험 실시한 결과 국내·외에서 수집 된 TD-1, TD-2, AT, JP 균주중 균사생장과 활력이 우수한 균주는 고체배지에서는 JP 그리고 액체배지에서는 AT인 것 으로 조사되었다. PD broth배지에서의 꽃송이버섯 균사배양에 적합한 온도는 20℃∼25℃였으며, 액체배지에서의 최적 pH는 3.0∼4.0으로 조사되어 강산성에서 활력을 가지는 특이성이 있는 버섯균으로 조사되었다. 또한 Agar가 첨가된 고체 배지에서는 JP를 제외한 3균주 모두 pH 4.0에서 생장이 우수하였고, JP균주는 pH 3.0에서 생장이 우수한 것으로 조사되 었다. 그러나 고체배지에서는 액체배지와는 달리 pH 5.0과 pH 6.0에서도 지속적인 생장을 하는 것으로 나타났다. 꽃송이 버섯의 균사배양을 위한 최적배지는 액체배양에서는 MCM배지로 Malt Yeast Extract배지보다 3.4배 높은 균체량을 보여 최적배지로 조사되었으나 이와는 다르게 고체배지 실험에서는 MCM배지는 균사생장이 부진했으며 Banana extract 배지 에서는 매우 빠른 생장을 보여 액체배양과 고체배양에 따른 최적배지는 다름을 알수 있었다. 꽃송이버섯의 대량 증식을 위 한 기초실험인 영양원 실험에서 탄소원으로는 Manitol이 4균주 모두 우수하였으며 Sucrose에서도 좋은 생장을 보였고 질 소원으로는 Sodium nitrate가 가장 우수하였기 영양원으로는 이들 두종류를 이용함이 타당할 것으로 생각된다. 꽃송이버 섯의 톱밥배지에서의 균사생장은 JP균주가 가장 왕성하였으며 TD-1과 TD-2균주는 다소 생장이 느리게 조사되었다. 수 종별로는 일본전나무에서 균사생장이 대체로 우수했으며 참나무류인 졸참나무에서는 균사생육이 다소 지연되긴 했으나 비교적 좋은 생장을 보였다. 본 실험에 사용한 4균주간의 균사생장력을 조사한 결과 AT와 JP균주가 활력이 우수한 것으 로 조사되었고 TD-1과 TD-2는 다소 늦은 생장을 보였다.
        191.
        2005.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        CO2는 버섯의 발이를 촉진하고 갓의 생성을 억제해서, 담자포자를 가지는 주름(gill)의 발달을 억제하여 버섯의 품질을 결정하는데 영향을 미친다. 본 실험에서는 큰느타리버섯의 생육에 가장 적합한 CO2농도를 구명하려고 1,600, 2,400, 3,200ppm 이하의 농도에서 버섯생육 실험하였다. 방임처리구에서 수확율은 방임조건 1,600, 2,400, 3,200ppm에서 각각 98.6, 99.3, 93.8%로 2,400ppm이 가장 우수하였고, 병당 무게에서도 2,400ppm이 가장 우수한 102.5g이 수확되었다. 품질은 2,400ppm이 6.1, 1,600ppm에서 5.5로 111% 우수하였다. 솎음처리구에서 품질은 1,600, 2,400, 3,200ppm에서 9.4, 9.5, 8.0로 2,400ppm이 가장 높았다. 병당 수확량은 1,600, 2,400, 3,200ppm에서 각각 90.7, 98.2, 77.3g 이어서 방임처리구와 마찬가지로 2,400ppm에서 많은 수확량을 보였다. 이러한 결과를 놓고 볼 때 방임과 솎음처리구의 최적 CO2농도는 2,400ppm으로 사료된다.
        4,000원
        193.
        2005.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        It is not difficult to see the road repairing. There are many and various machines which crush road surface. The efficiency and power of the machine depend on crushing head-shape, crushing interval, crushing load, crushing stress, machine's dropping height and roller's kind. The objective of this study is to select the optimal model among ten models of crushing machine with constraints such as crushing depth, variation, and crushed particle size. And then this paper provides the valid theoretical base on selected model. The data for this study are chosen from the site of construction in Kangnung during three months (2004. 6. 1~2004. 8. 31). The provided methodology in this paper will be fruitful not only for the selection of crushing machine but also for the aspects of construction period, cost, work efficacy according to the condition from the various sites of construction.
        4,000원
        194.
        2004.11 구독 인증기관 무료, 개인회원 유료
        It is not difficult to see the road repairing. There are many and various machines that can crush road surface. The efficiency and power of the machine depend on crushing head-shape, crushing interval, crushing load, crushing stress, machine's dropping height and roller's kind. The objective of this study is to select the optimal model among ten models of crushing machine with constraints such as crushing depth, variation, and crushed particle size. The data for this study are chosen from the site of construction in Kangnung during three months (2004. 6. 1 ~ 2004. 8. 31). The provided methodology in this paper will be fruitful not only for the selection of crushing machine but also for the aspects of construction period, cost, work efficacy according to the condition from the various sites of construction.
        4,000원
        195.
        2004.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Acrylic resins (HSCs : EA/EMA/2-HEMA/CLA) which contain 70% solid content were synthesized by the copolymerization of monomers (2-hydroxyethyl methacrylate, ethyl acrylate, and ethyl methacrylate) and functional monomer (caprolactone acrylate : CLA) which improves the crosslinking density and physical properties of films. The physical properties of the prepared acrylic resins (HSCs) containing CLA, are as follows : viscosity 245~515 cps ; Mn 2670~2840 ; and conversions, 83~91%, respectively. From the correlation of Tg values, viscosities, and Mn of the HSCs, it was found that viscosity and Mn increased with Tg value.
        4,000원
        196.
        2004.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        There is boner process of stone manufacturing to become quality down of stone to consolidated micro crack appearance of stone surface and biotite by fire that is to be route process in stone surface by flame of LPG. And then, it is develop that stone surface process equipment by automation for the work method of boner process can be substitute work method by shotball blasting. To developement of equipment, There is to be down noise and dust. Acording to remove calamity growth hazardous substance in the work environment, there is to solve workplace avoidance factor. We have taken Taguchi's parameter design approch, specifically orthogonal array, and determined the optimal levels of stone surface through analysis of the experimental results using SIN ratio.
        4,300원
        198.
        2004.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The optimization of conditions for the cultivation of Agaricus blazei was conducted in order to do mass production of mycelia by submerged cultivation. The carbon source and nitrogen source of medium were selected with high fructose syrup and soybean flake, and their optimized concentrations were determined as 8% and 3% respectively. Operation conditions were also optimized as the culture temperature of 25oC and pH of 6.5. The production of mycelia in the fermenter with optimized culture conditions has reached to 8.04 g/L, which was about 3 times as much as that of conventional flask cultivation. In the fed-batch cultivation, the productivity of Agaricus blazei mycelia was 12.01 g/L during 10 days.
        4,000원
        199.
        2003.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        A study to analyze and solve problems of a stone surface process experiment has presented in this paper. We have taken Taguchi's parameter design approach, specifically orthogonal array, and determined the optimal levels of the selected variables through analysis of the experimental results using S/N ratio.
        4,200원