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Ductile Fracture Behaviour of SA 533B Pressure Vessel Steel Under Mixed Mode (I/II) Loading (혼합 모드(I/II) 하중에 의한 SA533B 압력용기강의 연성파괴 특성에 관한 연구)

  • O, Dong-Jun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.25 no.11
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    • pp.1829-1834
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    • 2001
  • The aim of this study is to investigate the ductile fracture behavior under mixed mode (I/II) loading using SA533B pressure vessel steel. Anti-symmetric 4-point (AS4P) bonding tests were performed to obtain the J-R curves under two different mixed mode (I/II) loadings. In addition, the fractographic examination of fracture surfaces was carried out to compare with those of pure Mode I and Mode II. In conclusions, the J-R curves under Mixed Mode (I/II) loading were located between those of Mode I and Mode II loadings. When the mixture ratio of mixed mode (I/II) loading was high, the J-R currie of mixed mode (I/II) loading approached that of pure mode I loading after some amount of crack propagation. In contrast with the above fact, if the mixture ratio was low, the J-R curve looked after that of pure mode II loading. The fractographic evidences such as the shape of dimples under different loading conditions supported these conclusions.

Effects of Density, Resin and Particle Types on Properties of Composites from Wood Particle Mixed with Coating Paper

  • Lee, Phil-Woo
    • Journal of the Korean Wood Science and Technology
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    • v.27 no.4
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    • pp.57-64
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    • 1999
  • This research was carried out to investigate the effects of density, resin and particle types on the physical and mechanical properties of the composites made from various wood particles mixed with coating paper. The experiment was designed to apply with three particles (flake, chip, and fiber) and three resin types (urea, phenol and PMDI resin). The mixed ratio of coating paper to wood particle was fixed on 50 to 50% in each board making. And also it was designed to apply for four density levels (0.6, 0.7, 0.8 and 0.9 g/$cm^3$) and four mixed formulations of coating paper to wood particle (10:90, 20:80, 30:70, and 40:60 %) to analyze clearly the effects of PMDI resin. Coating paper-wood particle composites have acceptable bending strength (MOR, MOE) though the mixed ratio of coating paper was increased, but have low internal bond strength and poor dimensional stability (WA, TS, LE). Composites with high density had higher mechanical properties but showed lower physical properties than composites with low density. In conclusion, at least up to 20% mixed ratios, coating paper-wood particle composites have acceptable physical and mechanical properties, and PMDI resin has possibility for coating paper-wood particle composite manufacture.

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A Study on the Application of Wind Herbs(風藥) Blended with Prescriptions for Internal Disease Range in Donguibogam (동의보감(東醫寶鑑) 내상문(內傷門) 방제(方劑)에 배합(配合)된 풍약(風藥)의 활용(活用)에 대한 고찰(考察))

  • Jeon, Ji-Young;Moon, Goo
    • Herbal Formula Science
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    • v.17 no.2
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    • pp.1-20
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    • 2009
  • The purpose of this study was to examine how exterior-relieving herbs are blended by each prescription with emphasis on Internal disease range of Donguibogam by limiting Wind herbs in exterior-relieving herbs to apply exterior-relieving herbs to internal diseases. Prescriptions mixed with exterior-relieving herbs is a prescription adding Bojungikgitang, Yijintang, Yimyosan, Yukilsan and Gilgyeongjigaktang. The mixed exterior-relieving herbs were diversely operated according to each prescription or medicines. However, the mixed exterior relieving herbs were mixed for rising yang & tonifying qi(升陽益氣) for the most part. The exterior-relieving herbs mixed with prescriptions had the total 15 kinds, Bupleuri Radix, Cimicifugae Rhizoma among them were mixed with prescriptions for the most part. In addition, two-kind mixed exterior-relieving herbs were utilized in order of Bupleuri Radix Cimicifuga Rhizoma and Bupleuri Radix Cimicifugae Rhizoma Notopterygii Rhizoma Ledebouriellae Radix. Taken together, Wind herbs is applied several purpose, so that it can contribute to treatment and prevention of internal diseases in present-day.

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Conversion of Mixed Fat into Biodiesel in Plug Flow Reactor Using Alkali and Mixed Catalysts (관형반응기에서 알칼리 및 혼합촉매를 사용한 혼합지방의 바이오디젤화)

  • Hyun, Young-Jin
    • Journal of the Korean Applied Science and Technology
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    • v.27 no.2
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    • pp.123-128
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    • 2010
  • The continuous transesterification of mixed fat was done on the plug flow reactor packed with the static mixers. The transesterification using 0.5 wt% KOH, 0.8 wt% TMAH and mixed catalyst[40 v/v% KOH(0.5 wt%)+60 v/v% TMAH(0.8 wt%)] was conducted with the changes of molar ratios, weight percentage of beef, flow rates and number of static mixer's elements at $65^{\circ}C$. The overall conversion of mixed fat at 1:8 molar ratio, 50 wt% of beef and 24 of static mixer's elements increased until 0.7mL/min of flow rate. The overall conversion of mixed fat showed 96% at those conditions. So, the optimum operating conditions on tublar reactor were 1:8 molar ratio, 50 wt% of beef, 0.7 mL/min of flow rate and 24 of static mixer' s elements.

Quality Properties of Sulgi with Different Mixed Ratio of Brown Rice Flour and Germinated Brown Rice Flour (현미와 발아현미 혼합 비율을 달리한 설기의 품질 특성)

  • Kim, Jeongok;Shin, Malshick;Ro, Heekyong
    • Korean journal of food and cookery science
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    • v.29 no.5
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    • pp.591-598
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    • 2013
  • This study was investigated quality properties of Sulgi with different mixed ratio of brown rice flour (BRF) and germinated brown rice flour (GBRF) by rheometer and sensory evaluation. Moisture contents of Sulgi with different mixed ratio of BRF and GBRF were 44.3~46.0%. In textural properties of Sulgi by rheometer, the higher BRF mixed level, hardness of those were higher. The higher GBRF mixed level, springiness, cohesiveness and gumminess of those were higher. In sensory evaluation properties of Sulgi, the higher BRF mixed level, flavor, firmness and graininess of those were higher. The higher GBRF mixed level, surface color, off-flavor, adhesiveness and cohesiveness of those were higher. Correlation between textural properties and sensory evaluation properties, hardness and firmness, graininess, cohesiveness and moistness, gumminess and surface color, gumminess and off-flavor, were correlated positively(p<0.01). Hardness and surface color, hardness and cohesiveness, hardness and overall quality, springiness and firmness, springiness and graininess were correlated negatively (p<0.01).

Characterization of Reactions Taken Place by A Mixed Culture of Lactococcus lactis Cells in Cheese Ripening (치즈숙성과정 중의 Lactococcus lactis 혼합균에 의하여 일어나는 반응들의 특성)

  • 탁건태;김중균
    • Journal of Life Science
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    • v.6 no.1
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    • pp.27-33
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    • 1996
  • Reactions taken place by a mixed culture of Lactococcus lactis subsp. cremoris KH (lac$^{+}$ prt$^{+}$ ) and KHA (lac$^{-}$ prt$^{-}$ ) and KHA (lac prt ) in cheese ripening have been investigated. Growth characteristics of the mixed culture showed commensalism, and the amounts of proteinases of the mixed culture were small enough. From these results, it is concluded that the production of bitter taste by the mixed culture is a small matter, even if the density of the mixed culture is highly maintained during cheese ripening. Hence, the mixed culture of KH and KHA cells could be a good cheese starter in accelerating the process of cheese ripening.

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The Removal of Mixed Soil of Protein and Fat by Protease (프로테아제를 응용한 단백질과 지질 혼합오구의 제거)

  • Seong, Hye Yeong;Lee, Jeong Suk
    • Textile Coloration and Finishing
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    • v.13 no.2
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    • pp.18-18
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    • 2001
  • This study has examined the removal of mixed soil of protein and fat by protease. Cotton and PET fabrics were soiled by spotting of hemoglobin and triolein, respectively. The soiling order and soil concentration were changed in this procedure. The soiled fabrics were aged at 130℃ for 20 minutes. Protease was added in the alcohol ethoxylate(AE) detergent solution. The removal effciency was evaluated by analysis of protein and/or fat on the fabrics before and after washing, respectively. The detergency of PET fabrics was higher than that of cotton fabrics. The removal efficiency of hemoglobin was improved by protease from cotton and PET fabrics. Especially the removal efficiency of hemoglobin was remarkably improved from cotton fabrics. With the increase of hemoglobin and triolein (1:1) mixed soil, the removal of mixed soil was increased in proportion to mixed soil content up to a certain point. but it began to decrease above the point from cotton fabrics, while it was generally increased from PET fabrics. The detergency of total mixed soil from cotton fabrics was higher in case of soiling order with triolein after hemoglobin than in case of soiling order with triolein before hemoglobin. But the soiling order was not greatly effected in the detergency of total mixed soil from PET fabrics.

The Removal of Mixed Soil of Protein and Fat by Protease (프로테아제를 응용한 단백질과 지질 혼합오구의 제거)

  • 성혜영;이정숙
    • Textile Coloration and Finishing
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    • v.13 no.2
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    • pp.104-113
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    • 2001
  • This study has examined the removal of mixed soil of protein and fat by protease. Cotton and PET fabrics were soiled by spotting of hemoglobin and triolein, respectively. The soiling order and soil concentration were changed in this procedure. The soiled fabrics were aged at $130^\circ{C}$ for 20 minutes. Protease was added in the alcohol ethoxylate(AE) detergent solution. The removal effciency was evaluated by analysis of protein and/or fat on the fabrics before and after washing, respectively. The detergency of PET fabrics was higher than that of cotton fabrics. The removal efficiency of hemoglobin was improved by protease from cotton and PET fabrics. Especially the removal efficiency of hemoglobin was remarkably improved from cotton fabrics. With the increase of hemoglobin and triolein (1:1) mixed soil, the removal of mixed soil was increased in proportion to mixed soil content up to a certain point. but it began to decrease above the point from cotton fabrics, while it was generally increased from PET fabrics. The detergency of total mixed soil from cotton fabrics was higher in case of soiling order with triolein after hemoglobin than in case of soiling order with triolein before hemoglobin. But the soiling order was not greatly effected in the detergency of total mixed soil from PET fabrics.

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A Study on the Complex type & Space Character of Japanese Community Mixed-support Facility (일본 공동체복합지원시설의 복합화 유형과 공간에 관한 연구)

  • Kim, Su-Mi;Kim, Moon-Duck;Seo, Su-Mi
    • Journal of the Korean housing association
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    • v.20 no.2
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    • pp.11-18
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    • 2009
  • After 2004, as the community mixed-support facility in Japan was admitted as a private business of public facilities based on the Special Law for Urban Regeneration, the community mixed-support facilities in Japan are developed into various types with the view of the urban regeneration and urban renewal, more different point of view, and a tendency of establishment of the community facility has been considerably changed for the past twenty years. The reasons of the change are the social demand for the reformation of facility and the modification of subsidy constitution according to the establishment of equal facility. Some examples of that are the construction of lifelong education community and the change into a equivalent society between male and female and the adjusting to the aging and the welfare society and the social situation of more consumption recently, and in order to emerge from former building system, new facilities related to the contents are being expanded. The complex of the community mixed-support facility has an advantage in that it supplies the services for the complex of the community mixed-support facility, constitutes the communal character and the sense of solidarity among residents and can lead the development of region through the exchange of regional information. Through the Japanese community mixed-support facility which has many cases of it, this study would recognize the suggestion, the feature of it and examine the complex types.

Effect of Mixed Onion Pills on Plasma Triglyceride and Total Cholesterol Levels in Overweight or Obese Men (혼합 양파환이 과체중 및 비만 남성의 혈중 지질 농도에 미치는 영향)

  • Lee, Jeong-Sun;Kim, Young Ju
    • Journal of the East Asian Society of Dietary Life
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    • v.19 no.4
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    • pp.544-550
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    • 2009
  • The effect of mixed onion pills on body composition, blood pressure, and concentrations of blood glucose and lipids were studied in 10 men ($38.11{\pm}2.82$ years old). The mixed onion pills was produced by mixing quercetin, onion, mulberry leaves and buckwheat. Ten volunteers (male, BMI 23.0~35.4 kg/$m^2$) were chosen for this study. The volunteers consumed 1.2 g of mixed onion pills (containing about 30 mg of quercetin) per day for 2 months. The administration of the mixed onion pills did not produce any weight and BMI changes in the subjects. The systolic blood pressure and the level of blood glucose were slightly lowered by the supplementation of the mixed onion pills. After 2 months both the concentration of plasma triglycerides and total cholesterol of the subjects were lowered by 12.4% and 5.0%, respectively (triglyceride; pre $251.67{\pm}45.63$ mg/dL vs. post $220.44{\pm}44.67$ mg/dL and total cholesterol; pre $207.25{\pm}10.39$ mg/dL vs. post $196.63{\pm}10.47$ mg/dL, p<0.05). These results suggest that the mixed onion pills may possibly lower the level of plasma lipids in overweight or obese men (BMI greater than 23 kg/$m^2$).

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