• 한국의류학회지
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• 제40권5호
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• pp.775-787
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• 2016

This study examined the wearing conditions of compression wear for weight training. Compression wear has recently received significant attention from the public and athletes as high-level functional sportswear. The survey was conducted on 373 men in their 20s for general information on purchase behavior, preferred brand, function, and preferred design. The majority of participants (n=181) were aware of the function of compression wear. The most selected reason for wearing compression wear was for its convenience during sports activities. Respondents had the greatest preference for designs with a round neckline, regular leggings type, upper arm-length sleeve, and thigh-length bottom. Respondents also wanted a stronger compression in the core muscle part (abdomen, back, and waist).

• 한국농공학회지
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• 제15권2호
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• pp.2968-2979
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• 1973

The aim of this study was to bring light on the effect of permeability to yield weight of paddy rice on the compressed soil. a) The percolation volume during the growth of paddy rice reduced, while the degree of compression on soil column increased and varied by the evaporation and absorption volumn. b) The percolation volume in the natural soil column was notably low compared with that of in the artificial and had little influence to the variation of permeabilty by compression. c) The results in growth of paddy rice were best on the section of low compression and the yield weight reduced, while the degree of compression on the soil column increased. d) The relationship between the yield weight and percolation volumn, under the condition when percolation volume is 1mm/day, had little difference in the yield weight but immediately reduced under $0.5{\sim}1.0mm/day$. The consequences of investigation are not so perfect, but have done my best to get some new data for effect on additional yield by inquiring into influences of permeability to the yield weight of paddy rice on compressed paddy field. I will have a great pleasure if treatise helps investigaters or the men of affairs in this field.

• Journal of Biosystems Engineering
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• 제30권2호
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• pp.89-94
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• 2005

The compression strength of corrugated fiberboard container for packaging the agricultural products rapidly decreases because of various environmental conditions during distribution of unitized products. Among various environmental conditions, the main factors affecting the compression strength of corrugated fiberboard are absorption of moisture, long-term accumulative load, and fatigue caused by shock and vibration. An estimated rate of damage for fruit during distribution is about from 30 to 40 percent owing to the shock and vibration. This study was carried out to characterize the durability of corrugated fiberboard container for packaging the fruit and vegetables under simulated transportation environment. The vibration test system was constructed to simulate the land transportation using truck. After the package with corrugated fiberboard container was vibrated by vibration test system at various experimental conditions, the compression test for the package was performed. The compression strength of corrugated fiberboard container decreased with loading weight and vibrating time. The multiple nonlinear regression equation for predicting the decreasing rate of compression strength of corrugated fiberboard containers were developed using four independent variables such as input acceleration level, input frequency, loading weight and vibrating time. The influence of loading weight on the decreasing rate of corrugated fiberboard container was larger than other variables.

• 한국컴퓨터정보학회논문지
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• 제29권3호
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• pp.173-180
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• 2024

본 연구는 가정용 침대 위에서 발생한 심정지 환자에게 가슴압박을 수행할 경우 환자의 체중과 구조자의 체중에 따른 가슴압박 정확도의 차이를 확인하고자 하였다. 2023년 01월 07일부터 01월 19일까지 대한심폐소생협회의 KBLS 교육과정을 이수한 N대학교와 S대학교의 응급구조(학)과 학생 36명을 대상으로 대상자의 무릎 위치에서 매트리스가 눌리는 깊이, 마네킹의 무게에 의해 매트리스가 눌리는 깊이를 측정하였고, 2분간 연속된 가슴압박을 수행하는 동안 가슴압박 깊이, 속도, 압박 위치 불량, 가슴압박 깊이 50 mm 미만 횟수, 모든 변수를 고려한 정확도를 측정하였다. 연구결과 가정에서 소아 심정지를 발견한 경우 환자를 바닥으로 이동시켜 가슴압박을 진행하고, 성인 심정지를 발견한 최초목격자는 환자를 무리하게 침대 밑으로 내려 가슴압박을 진행하기보다는 침대 위에서 진행하는 것을 권장한다.

• 방송공학회논문지
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• 제26권6호
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• pp.778-789
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• 2021

최근 다양한 분야에서 뛰어난 성능을 나타내는 Convolutional Neural Network(CNN)모델을 모바일 기기에서 사용하기 위한 다양한 연구가 진행되고 있다. 기존의 CNN 모델은 모바일 장비에서 사용하기에는 가중치의 크기가 크고 연산복잡도가 높다는 문제점이 있다. 이를 해결하기 위해 가중치의 표현 비트를 낮추는 가중치 양자화를 포함한 여러 경량화 방법들이 등장하였다. 많은 방법들이 다양한 모델에서 적은 정확도 손실과 높은 압축률을 나타냈지만, 대부분의 압축 모델들은 정확도 손실을 복구하기 위한 재학습 과정을 포함시켰다. 재학습 과정은 압축된 모델의 정확도 손실을 최소화하지만 많은 시간과 데이터를 필요로 하는 작업이다. Weight Quantization이후 각 층의 가중치는 정수형 행렬로 나타나는데 이는 이미지의 형태와 유사하다. 본 논문에서는 Weight Quantization이후 각 층의 정수 가중치 행렬을 이미지의 형태로 비디오 코덱을 사용하여 압축하는 방법을 제안한다. 제안하는 방법의 성능을 검증하기 위해 ImageNet과 Places365 데이터 셋으로 학습된 VGG16, Resnet50, Resnet18모델에 실험을 진행하였다. 그 결과 다양한 모델에서 2%이하의 정확도 손실과 높은 압축 효율을 달성했다. 또한, 재학습 과정을 제외한 압축방법인 No Fine-tuning Pruning(NFP)와 ThiNet과의 성능비교 결과 2배 이상의 압축효율이 있음을 검증했다.

• 대한인간공학회지
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• 제31권2호
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• pp.337-343
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• 2012

Objective: The aim of this study was to determine the effect of abdominal-compression belt in one leg standing on balance in normal adult. Background: With the effects of increased intra-abdominal pressure, the abdominal-compression belt is contributing to a static balance control. However, specific study is still insufficient. Method: Forty subjects were randomly allocated to two groups: control(n=20) and experimental group(n=20), respectively. The experimental group used an abdominal-compression belt, whereas the control group did not that. All subjects were educated using pressure biofeedback unit and ultrasound imaging for exact application by abdominal-compression belt. Main outcome measurement was used a general stability index, fourier harmony index, weight distribution index, and fall index in tetrax balance system. Results: Experimental group improved significantly on general stability, only 2 factors(eyes closed with head turned forward and eyes closed with head turned backward) among fourier harmony index, and fall index, However, weight distribution index did not revealed significant difference. Conclusion: The findings suggest that application of abdominal-compression belt could be effective on improving balance ability in one leg standing of normal adults. Application: The results of the abdominal-compression belt might help to control balance in workers.

• 한국지반공학회논문집
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• 제29권1호
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• pp.39-47
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• 2013

석탄회를 활용한 CLSM(Controlled Low Strength Material)의 적용성이 증가됨에 따라, 본 연구에서는 경량기포CLSM의 압축강도와 단위중량과의 관계에 초점을 맞추어, CLSM 재료에 관련된 기초연구를 수행하였다. 일축압축강도는 구조물에 적용시 재굴착이 가능한지를 판단할 수 있는 기준이 되고 있으며 시험결과를 통해 경제성 및 효율성, 굴착성 등을 판단할 수 있는 중요한 배합설계변수이다. 그러나 CLSM의 일축압축강도는 재령 28일 기준으로 적용성을 판단하기 때문에, 정량적인 일축압축강도값을 알기 위해서는 배합 후 일정시간이 지나야한다. 본 연구에서는 저강도 고유동화재(CLSM)에 기포를 혼입하여 경량화시킨 경량기포 CLSM에 중점을 두어 경량기포 CLSM의 압축강도와 단위중량(기포슬러리 단위중량, 겉보기 단위중량)과의 관계를 분석하였고, 슬러리를 28일까지 양생시키지 않고 단위중량만으로 28일의 압축강도를 쉽게 예측할 수 있는 관계식을 제안하였다.

• 한국가스학회:학술대회논문집
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• 한국가스학회 2004년도 추계학술발표회 논문집
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• pp.82-87
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• 2004

Compression ring is a part of LNG storage tank. The main function of the compression ring is connected the roof plate with concrete side wall. End of its one side is embedded in the side concrete wall and the other's connected with the roof plate by welding. It is designed to support stably for all the loads such as self weight of steel roof, inner pressure and concrete weight. We fulfill the FEM analysis to analysis the compression ring behavior during construction. Also we studied the effect of the change of design variables. On the basis of the results, we could introduce a more reasonable design method for compression ring.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.1159-1164
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• 2006

In this paper an artificial neural network model is developed to estimate the unconfined compression strength of Deep Cement Mixing(DCM) treated soil. A database which consists of a number of unconfined compression test result compiled from 9 clay sites is used to train and test of the artificial neural network model. Developed neural network model requires water content of soil, unit weight of soil, passing percent of #200 sieve, weight of cement, w-c ratio as input variables. It is found that the developed artificial neural network model can predict more precise and reliable unconfined compression strength than the conventional empirical models.

• Journal of Biosystems Engineering
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• 제37권1호
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• pp.51-57
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• 2012

Purpose: The compression strength of corrugated fiberboard containers used to package agricultural products rapidly decreases owing to various environmental factors encountered during the distribution of unitized products. The main factors affecting compression strength are moisture absorption, long-term top load, and fatigue caused by shock and vibration during transport. This study characterized the durability of corrugated fiberboard containers for packaging fruits and vegetables under simulated transportation conditions. Methods: Compression tests were done after corrugated fiberboard containers containing fruit were vibrated by an electro-dynamic vibration test system using the power spectral density of routes typically traveled to transport fruits and vegetables in South Korea. Results: To predict loss of compression strength owing to vibration fatigue, a multiple nonlinear regression equation ($r^2=0.9217$, $RMSE=0.6347$) was developed using three independent variables of initial container compression strength, namely top stacked weight, loading weight, and vibration time. To test the applicability of our model, we compared our experimental results with those obtained during a road test in which peaches were transported in corrugated containers. Conclusions: The comparison revealed a highly significant ($p{\leq}0.05$) relationship between the experimental and road-test results.