• Structural Engineering and Mechanics
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• 제89권3호
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• pp.239-252
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• 2024

Steel plate shear walls (SPSWs) are classified as lateral load-resisting systems. The feasibility of openings in the steel plate is a characteristic of SPSWs. The use of openings in SPSWs can lower the load capacity, stiffness, and energy dissipation. This study proposes a novel form of SPSWs that provides convenient access through openings by combining steel plates and eccentrically braced frames (EBFs). The proposed system also avoids a substantial reduction in the strength and stiffness. Hence, various geometric forms were analyzed through two different structural approaches. Groups 1, 2, and 3 included a steel EBF with a steel plate between the column and EBF in order to improve system performance. In Group 4, the proposed system was evaluated within an SPSW with openings and an EBF on the opening edge. To evaluate the performance of the proposed systems, the nonlinear finite element method (NL-FEM) was employed under cyclic loading. The hysteresis (load-drift) curve, stress contour, stiffness, and damping were evaluated as the structural outputs. The numerical models indicated that local buckling within the middle plate-EBF connection prevented a diagonal tension field. Moreover, in group 4, the EBF and stiffeners on the opening edge enhanced the structural response by approximately 7.5% in comparison with the base SPSW system.

• 보건교육건강증진학회지
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• 제13권1호
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• pp.117-127
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• 1996

The purpose of this study was to investigate the variation in constituent element of blood between the massage group and non-massage group for period of convalescence after giving intense physical exercise of 180beat/min. for 10 men studying physical exercises. Education in K university served as the subjects for this study. The following are the results of the study. 1. The variation in white blood corpuscles showed a tendency of equal ascension in both groups just after finishing physical exercise, but the subjects in the massage group showed quicker recuperation than the subjects in the non-massage. The subjects in the massage group showed a lower tendency than the subjects in the non-massage group for 30minutes after finishing physical exercise. 2. In the variation of red blood corpuscles, it was increased in the massage and non-massage group after physical exercise, but it showed a tendency to drastically decrease in the massage group after 30 minutes. 3. Hemoglobin showed a variation increasing in the massage group and non-massage group after physical exercise, but it showed a tendency of rapid decrease in the massage group after 30 minutes. 4. In the variation of hematocrit, it showed a tendency of similar increase after physical exercise in the massage and non-massage group, but the subjects in the massage group showed a higher decrease than ones in the non-massage after 30 minutes. 5. Blood platelet was increased in the subjects of the massage group after physical exercise, but it was decreased drastically after 30 minutes. 6. In the variation of blood glucose, it was increased in the subjects in the massage group and decreased in the non-massage group after physical exercise, but it showed a tendency of rapid decrease in the non-massage group after 30 minutes.

• 대한치과보철학회지
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• 제52권4호
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• pp.305-311
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• 2014

목적: 다양한 원인으로 발생된 Abfraction 병소가 있는 치아를 금속도재관으로 수복 할 경우, 변연의 위치에 따라 예후가 다양해질 수 있다. 수복물의 장기적 성공을 검증하기 위해서는 응력분포의 분석이 필요하지만 금속도재관이 abfraction 병소의 적응증인 경우 금속도재관이 응력 분포에 미치는 영향을 밝히는 연구는 아직 없다. 본 연구의 목적은 abfraction 병소가 있는 치아를 수복하는 금속도재관이 바람직한 응력 분포를 나타낼 수 있는 조건을 알아 보고자 함이다. 재료 및 방법: 치아, 주위 조직과 금속 도재관의 외형을 반영한 2차원 유한 요소모델을 제작하고 144 N의 편심 교합력 하에서의 응력분포를 유한요소 분석법으로 분석하였다. 금속 도재관의 변연 위치를 쐐기모양의 결손부의 하연에(Group 0), 그리고 결손부의 하연보다 1 mm 하방(Group 1)과 2mm 하방(Group2)에 위치시켰다. 결과: Group 0에서 von Mises stress는 금속 도재관의 변연과 결손부의 첨부에 집중 되었고 협측 변연의 응력은 설측 부위로 분포되었다. Group 1과 Group 2에서의 응력분포양상은 비슷하게 나타났다. 응력은 결손부의 첨부에 집중되지만 협측과 설측의 응력띠는 서로 분리된 양상으로 나타났다. 결론: 금속도재관의 변연을 Abfraction 병소의 하연에 설정할 경우, 금속도재관은 Abfraction 병소의 첨부에 응력을 집중시킨다.

• 동의생리병리학회지
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• 제28권3호
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• pp.337-345
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• 2014

The present study examined the effects of soybean-derived phosphatidylserine (SB-PS) on the learning and memory function and the neural activity in rats with trimethyltin (TMT)-induced memory deficits. The cognitive improving efficacy of SB-PS on the amnesic rats, which was induced by TMT, was investigated by assessing the Morris water maze test and by performing cholineacetyl transferase (ChAT), acetylcholinesterase (AChE) and cAMP responsive element binding protein (CREB) immunohistochemistry. A positron emission tomography (PET) scanning the rat brain was by performed administer 18F-Fluorodeoxy-glucose (18F-FDG). The rats with TMT injection showed impaired learning and memory of the tasks and treatment with SB-PS produced a significant improvement of the escape latency to find the platform in the Morris water maze at the 2nd day compared to that of the MCT group. In the retention test, the SB-PS group showed increased time spent around the platform compared to that of the MCT group. Consistent with the behavioral data, SB-PS 50 group significantly alleviated the loss of acetyl cholinergic neurons in the hippocampus compared to that of the MCT group. Treatment with SB-PS significantly increased the CREB positive neurons in the hippocampus as compared to that of the MCT group. In addition, SB-PS groups increased the glucose uptake in the hippocampus and SB-PS 50 group increased the glucose uptake in the frontal lobe, as compared to that of the MCT group. These results suggest that SB-PS may be useful for improving the cognitive function via regulation of cholinergic marker enzyme activity and neural activity.

• 한국의류학회지
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• 제33권9호
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• pp.1506-1518
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• 2009

This study identifies the relationships among demographic variables, well-being health consciousness, sports/leisure activity, and the perceived premium price for high functional sports/leisure wear. An empirical study was conducted with the data collected by questionnaires distributed to male and female respondents aged 15 and over. Descriptive statistics, factor analysis, MANOVA, two-way ANOVA, and regressions were used to analyze 244 answers. As a result, 3 factors were determined for well-being health consciousness: nature-friendly life, premium consumption for health, and health care. The older group pursued a nature-friendly life more than the younger group, the female group pursued premium consumption for health more than male group, and older women and younger men pursued health care more than their counterparts. Sports/leisure activity was relatively intensive in the male group and in the younger group. Sports/leisure activity was explained by male characteristic and health care factors. Sports/leisure activity was the only element for predicting the perceived premium price ratio for high functional sports/leisure wear.

• Asian-Australasian Journal of Animal Sciences
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• 제14권5호
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• pp.677-679
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• 2001

Effect of Growell a herbomineral premix was evaluated on performance, organ weight, humoral immune response, tissue and serum trace element profile of boilers. Day old 50 Babcock broiler chicks were randomly divided in two groups (C and T) and reared on deep litter system for 6 weeks of age. Chicks from group C were given basal diet while chicks from T group were fed basal diet supplemented with Growell at the rate 0.35 g/Kg. The chicks were vaccinated with Lasota strain of NCDV at $4^{th}$ and $28^{th}$ day of age. The birds receiving Growell treatment had higher body weight with better feed conversion ratio as compare to that of control chicks. Growell treatment had significantly reduced per cent weight of spleen and kidney, whereas that of bursa was increased. There was no effect of treatment on relative weight of thymus. HI antibody titer against NCDV in Growell treated chicks were higher as compare to untreated chicks indicating better humoral immune status. Growell treatment had no effect on serum Fe and Zn concentration. Dietary supplementation of Growell had significantly increased iron content of liver, kidney and muscle; zinc content of kidney and muscle; copper content of kidney and muscle and Mn content of kidney. Growell treatment improved the body weight, FCR and humoral immune status of broilers. Similarly, deposition of trace minerals in various organs was also increased in comparison to control.

• 대한치과보철학회지
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• 제31권4호
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• pp.611-624
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• 1993

The purpose of this study was to analyze the stress distribution of the natural teeth, the implant, the prosthesis and the supporting tissue according to the types of implant and connection modality in the five-unit fixed partial denture with a implant pier abutment. A Two dimensional stress analysis model was constructed to represent a mandible missing the first and second premolars and first molar. The model contained a canine and second molar as abutment teeth and implant pier abutments with and without stress-absorbing element. Finite element models were created and analyzed using software ANSYS 4.4A for IBM 32bit personal computer. The results obtained were as follows. 1. Implant group, compared to the natural teeth group, showed a maximum principal stress at the superior portion of implants and a stress concentration at :he neck and end portion. 2. Maximum principal stress and maximum Von Mises stress were always lower in the case of rigid connection than nonrigid connection. 3. A cylinder type implant with stress absorbing element and screw type implant were generally similar in the stress distribution pattern. 4. A screw type implant, compared to the cylinder type implant, showed a relatively higher stress concentration at both neck and end portion of it. 5. Load B cases showed higher stress concentration on the posterior abutments in the case of nonrigid connector than rigid connector. 6. A maximum displacement was always lower in the case of rigid connection than nonrigid connection. These results suggest that osseointegrated implant can be used as an intermediate abutment.

• Structural Engineering and Mechanics
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• 제49권1호
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• pp.95-110
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• 2014

The study deals with physical modeling of space frame-pile foundation and soil system using finite element models. The superstructure frame is analyzed using complete three-dimensional finite element method where the component of the frame such as slab, beam and columns are descretized using 20 node isoparametric continuum elements. Initially, the frame is analyzed assuming the fixed column bases. Later the pile foundation is worked out separately wherein the simplified models of finite elements such as beam and plate element are used for pile and pile cap, respectively. The non-linear behaviour of soil mass is incorporated by idealizing the soil as non-linear springs using p-y curve along the lines similar to that by Georgiadis et al. (1992). For analysis of pile foundation, the non-linearity of soil via p-y curve approach is incorporated using the incremental approach. The interaction analysis is conducted for the parametric study. The non-linearity of soil is further incorporated using iterative approach, i.e., secant modulus approach, in the interaction analysis. The effect the various parameters of the pile foundation such as spacing in a group and configuration of the pile group is evaluated on the response of superstructure owing to non-linearity of the soil. The response included the displacement at the top of the frame and bending moment in columns. The non-linearity of soil increases the top displacement in the range of 7.8%-16.7%. However, its effect is found very marginal on the absolute maximum moment in columns. The hogging moment decreases by 0.005% while sagging moment increases by 0.02%.

• 보존과학회지
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• 제35권5호
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• pp.430-439
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• 2019

본 연구는 사비백제시기 사찰지에서 출토된 치미를 대상으로 화학적, 광물학적 특성에 대하여 분석하였다. 화학적 특성에서 군수리사지 출토 치미 1점을 제외한 대부분의 치미는 유사한 희토류 원소 분포패턴을 보이기 때문에 동일한 기반암에서 생성된 점토를 사용하였음이 확인된다. 하지만 주성분 및 미량원소 조성양상이 달라 동일 기반암이라 할지라도 차별화된 풍화과정을 겪었거나 제작과정에서 차이가 있었을 것으로 추정된다. 광물학적 특성은 3개의 유형으로 구분되며 Fe₂O₃-TiO₂의 도식에서 Fe₂O₃이 5 wt% 이상 검출되는 시료가 상대적으로 높은 소성온도로 제작되었을 것으로 추정되는 그룹과 동일한 양상이 확인된다. 따라서 출토지에 따른 동질성은 낮으나 시료 간의 군집 경향이 확인되어 사용처에 따른 제작이 이루어졌다고 보다는 사용시점에 따른 제작이 진행되었을 가능성이 높다.

• 대한전자공학회논문지SP
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• 제48권3호
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• pp.106-111
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• 2011

본 논문은 H.264나 MPEG4등, 다양한 영상압축 코덱을 지원할 수 있는 ME ASIP의 전용 IME 명령어와 재구성 가능한 하드웨어 구조를 제안한다. 제안하는 전용의 명령어와 하드웨어 가속기는 HD급의 고화질 영상을 지원할 수 있는 성능을 가지고 있다. 제안하는 IME명령어는 다수의 병렬 연산과 패턴 정보를 이용한 연산기 제어를 통하여 전역탐색을 비롯한 각종 고속 탐색 알고리즘을 지원한다. 제안한 하드웨어 구조는 256개의 Processor Elements로 구성되어 있는 Processor Element Group (PEG) 하나당 77,860 게이트를 가진다. 16개의 PEG로 구성된 ASIP은 160MHz의 동작 주파수를 가지고 있으며, HD급 1080p의 해상도를 가지는 영상을 실시간으로 동작 시킬 수 있다.