• 한국축산식품학회지
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• 제23권2호
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• pp.109-114
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• 2003

연도그룹에 따른 도체특성의 차이는 tender 그룹이 tough 그룹에 비해 무거운 도체중과 두꺼운 등지방 두께, 우수한 근내지방도, 밝은 육색, 흰 지방 및 좋은 조직감을 나타내었다(<0.05). 근절길이의 변화는 사후 시간이 경과함에 따라 지속적으로 감소하는 경향을 보였으며, 특히 사후 3시간 이후에 유의적으로 감소하였다(p<0.05). 연도에 따른 그룹간의 비교에서는 사후 3, 6 및 24시간에서 tender 그룹이 tough 그룹에 비해 유의적으로(p<0.05) 긴 근절길이를 나타내었다. 그리고 tender 그룹은 tough 그룹에 비해 낮은 IMCT 전단가를 나타내었고(p<0.05), 관능적으로 우수한 연도와 기호성을 나타내었다(p<0.05). 이상의 결과에서, 육의 연도는 다른 도체특성에 비해 등지방두께, 근내지방도 및 조직감과 밀접한 관련성을 보였으며, 사후초기인 3과 6시간에서의 근절길이를 측정함으로써 사후 24시간째 연도의 추정이 가능할 것으로 사료된다. 그리고 동일한 나이에서 연도와의 관련성은 총 콜라겐 및 가용성 콜라겐 함량보다는 근육내 결체조직의 강도와 더 높은 관련성 (p<0.05)이 있는 것으로 나타났다.

• 한국산학기술학회논문지
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• 제16권4호
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• pp.2917-2923
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• 2015

본 논문은 내진성능평가를 위해 사용되는 비탄성해석의 신뢰도와 정확도에 있어 결정적인 영향을 미치는 다양한 이력모델의 특성과 구조물의 내진거동에 미치는 영향을 분석하고자 한다. 연구대상은 표준학교건물로서 우리나라 규준에 맞는 인공지진 가속도 3가지를 사용하여 4가지의 이력모델을 적용하여 3차원 시간이력해석을 수행하였다. 비탄성해석을 통해 층전단력, 층간변위비, 층변위를 비교하고 힌지의 발생 상태를 파악하고 이력모델이 건물의 비탄성거동에 미치는 영향을 분석하였다. 연구 결과, 층전단력은 이력모델에 따라 최대 27%의 차이를 보이고, 층간변위비는 최대 30%의 차이가 나타났다. 장단변방향 모두에서 층전단력과 층간변위비는 최대값이 수정다케다모델에서 나타나 안전율 향상을 기대할 수 있을 것으로 판단된다. 층전단력의 최소값은 장단변방향 모두에서 클러프모델에서, 층간변위비는 장변방향은 다케다모델, 단변방향은 클러프모델에서 나타났고 이 경우 안전율이 낮아질 것으로 사료된다.

• 한국식품영양학회지
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• 제11권5호
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• pp.580-584
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• 1998

Tenderization of beef by the addition of barks(Morus alba Linne) and its sensory properties were observed by shearing test, cooking loss, pH, protein content and sensory evaluation. Shear force was decreased as the addition level of barks (Morus alba Linne) increased. Tenderization effect of beef was increased 8,8% at the addition level of 2.5%, 25% at 5.0%, 4.7% at 7.5%, 58% at 10% barks(Morus alba Linne). Cooking loss was observed 44.50% at the no addition, 45.3% at 2.5%, 45.8% at 5.0%, 47.5% at 7.5%, 50.0% at 10% addition level of barks (Morus alba Linne). As the addition level of barks(Morus alba Linne) increased pH of cooked beef decreased to the range of 5.6 to 5.46. As the addition level of barks (Morus alba Linne) increaed protein content of beef decreased whereas protein content of cooled liquor increased. The addition of barks(Morus alba Linne) improved the sensory quality of cooked beef. Especially, tenderness scored the highest value in 10% added beef and other quality factors color, flavor, juiciness and overall quality were evaluated significantly high in 5% added beef. Therefore 5% addition level of barks(Morus alba Linne) for cooking beef was suggested as the desirable level of addition.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집A
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• pp.596-601
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• 2000

The paper presents free vibration and stability analyses of a non-uniform Timoshenko beam resting on a two-parameter elastic soil. The soil parameters can vary along the spat and is assumed to be two-parameter model including the effects of both transverse shear deformation and elastic foundation Governing equations related to the vibration and the stability of the beam are derived from Hamilton's principle, and the resulting eigen-value problems can be solved to give natural frequencies and critical force by finite element method. Numerical results for both vibration and stability of beams under an axial force are presented and compared with other available solutions. Finally, vibration frequencies, mode shapes and critical forces are investigated for various thickness ratios, shear foundation parameter, Winkler foundation parameter and boundary conditions of tapered Timoshenko beams.

• 한국식품영양학회지
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• 제12권5호
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• pp.523-528
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• 1999

The influence of ginseng on the paste or gelatinization properties by amylograph and mixing properties by farinograph of wheat flour and on quality properties color cooking quality textural and sensory properties and reducing microbial population of LL(Long Life) noodles was studied. The contents of ginseng used were from 5% to 10% based on flour weight. The viscosity property of wheat flour with ginseng was increased the initial pasting temperature but the amylograph peak viscosity were decreased in vice versa. The farinograph absorption stability and breakdown were increased by ginseng. The whiteness of Ll nodles manufactured with ginseng was lower than that of control The shear extrusion force and hardness of LL noodles manufactured with ginseng were shown much higher value than those of control. At cooking quality examination of LL noodles manufactured with ginseng weight of cooked LL noodles was decreased but volum was appeared in ice versa,. Extraction amounts of LL noodles manufactured with ginseng during cooking were much smaller than those of control Total count of microorganism of Ll noodles manufactured with ginseng were decreased during storage at 3$0^{\circ}C$ Sensory properties of cooked LL noodles which was manufactured with ginseng showed quite acceptable. Based on the cooking and sensory evaluation test addition of 7.0% ginseng to wheat flour may be suitable for processing LL noodles.

• 한국식품위생안전성학회지
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• 제14권2호
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• pp.160-166
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• 1999

Microbial populations of total aerobic bacteria and coliforming bacteria, TBA, Hunter's color value, heme pigments, muscle protein solubility, cooking loss and shear force were investigated fro evaluating the shelf life of chicken legs gamma-irradiated at doses of 1, 3, 5 and 10 kGy with air-contained and vacuum-packaged methods. The initial microbial populations decreased with gamma irradiation depending upon the dose, and microorganisms in the vacuum-packaged samples were inhibited more than those in the air-contained samples. Hunter's L and a values of the surface and inside of the legs increased by gamma irradiation, showing a bright red color and the red color was maintained during the storage of both samples. The concentrations of oxymyoglobin among the heme pigments increased by gamma irradiation. Muscle protein solubility slightly increased by increasing the applied dose. There were no significant differences in the cooking loss and shear force values. In conclusion, the combination of gamma irradiation and vacuum-packaging could extend the shelf life of chilled chicken without deterioration of the quality.

• 한국축산식품학회:학술대회논문집
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• 한국축산식품학회 2001년도 임시총회 및 제28차 추계학술발표회
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• pp.104-104
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• 2001

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2000년도 춘계학술발표대회 논문집
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• pp.101-104
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• 2000

The general solution of the anti-plane shear problem for the curved interfacial crack between viscoelastic foam and composites was investigated with the complex variable displacement function and Kelvin-Maxwell model. The Laplace transform was applied to treat the viscoelastic characteristics of foam in the analysis. The stress intensity factor near the interfacial crack tip was predicted by considering both anisotropic and viscoelastic properties of two different materials. The results showed that the stress intensity factor increased with increasing the curvature of the curved interfacial crack and it also increased and eventually converged to a specific value with increasing time.

• Interaction and multiscale mechanics
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• 제5권4호
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• pp.369-383
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• 2012

In this paper, soil-structure interaction analysis has been presented for beams resting on multilayered geosynthetic-reinforced granular fill-soft soil system. The soft soil and geosynthetic reinforcements are idealized as nonlinear springs and elastic membranes, respectively. The governing differential equations are solved by finite difference technique and the results are presented in non-dimensional form. It is observed from the study that use of geosynthetic reinforcement is not very effective for maximum settlement reduction in case of very rigid beam. Similarly the reinforcements are not effective for shear force reduction if the granular fill has very high shear modulus value. However, multilayered reinforced system is very effective for bending moment and differential settlement reduction.

• 한국건축시공학회지
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• 제12권5호
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• pp.510-517
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• 2012

This study evaluated the recycling potential of in-site waste soil as pile back filling material (PBFM). We performed experiments to check workability, segregation resistance, bond strength, direct shear stress test, and dynamic load test using in-site waste soil in coastal areas. We found that PBFM showed better performance than general cement paste in terms of workability, segregation resistance, and bond strength. On the other hand, the structural performance of PBFM was slightly lower than that of general cement paste due to the skin friction force of pile by Pile Driving Analyzer and direct shear stress. However, because this type of performance degradation in terms of structure can be improved through the use of piles with larger diameter or by changing the type of pile, considering the economics and environment, we considered that recycling of PBFM has sufficient value.