• 패션비즈니스
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• 제22권6호
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• pp.105-114
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• 2018

The purpose of this study is to investigate the diverse constructive characteristics which significantly affects performance besides materials information provided to consumers on functional clothes. Outdoor jackets can classified them according to their performance level. In order to provide consumers with necessary information to choose functional outdoor jackets, 12 brands selling domestic outdoor jackets were investigated and the conclusion of this study was as follows; It was found that fit degree, backpack weight, arm-raise, and number of pockets vary differently depending on performance level of outdoor jacket. Considerable constructive difference was found between high performance jacket mainly worn by professional climbers in extreme environment and jacket that can be worn in daily life. It is found that different characteristic is related not only to each diverse & complex constructive aspect, but also to ability to stretch, resistance to water, venting system of materials depending on performance level of outdoor jacket.

• 한국운동역학회지
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• 제27권2호
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• pp.109-116
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• 2017

Objective: This study aimed to investigate the relationship between leg stiffness and kinematic variables according to load while running. Method: Participants included eight healthy men (mean age, $22.75{\pm}1.16years$; mean height: $1.73{\pm}0.01m$; mean body weight, $71.37{\pm}5.50kg$) who ran with no load or a backpack loaded with 14.08% or 28.17% of their body weight. The analyzed variables included leg stiffness, ground contact time, center of gravity (COG) displacement and Y-axis velocity, lower-extremity joint angle (hip, knee, ankle), peak vertical force (PVF), and change in stance phase leg length. Results: Dimensionless leg stiffness increased significantly with increasing load during running, which was the result of increased PVF and contact time due to decreased leg lengths and COG displacement and velocity. Leg length and leg stiffness showed a negative correlation (r = -.902, $R^2=0.814$). COG velocity showed a similar correlation with COG displacement (r = .408, $R^2=.166$) and contact time (r = -.455, $R^2=.207$). Conclusion: Dimensionless leg stiffness increased during running with a load. In this investigation, leg stiffness due to load increased was most closely related to the PVF, knee joint angle, and change in stance phase leg length. However, leg stiffness was unaffected by change in contact time, COG velocity, and COG displacement.

• 산업안전기술지
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• 제3권1호
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• pp.11-17
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• 2003

In recent years, work-related musculoskeletal disorders (WMSDs) are one of major issues in occupational safety and health in Korea, since the number of injured workers has rapidly increased and the related regulation was amended to improve the work conditions. Main risk factors of WMSDs in Korean industries include manual handling of heavy weight loads, awkward postures, repetitive tasks, prolonged static muscle contraction, and so on. in this article, some ergonomics case studies for identifying the risk factors of WMSDs and far their prevention were introduced. They include a biomechanical analysis for the heavy-weight handling task in a machine-repair shop, physiological evaluation of backpack-carrying tasks in a beverage delivery job, and a set of psychophysical studies to evaluate static-postural load. These studies showed that there are several different ergonomic approaches to identifying and evaluating risk factors of WMSDs and to eliminating them or reducing their levels, and that it is important to select proper methods and apply them in improving the work conditions according to the characteristics of the task. In addition, it needs to develop practical and effective ergonomic tools to prevent WMSDs and to provide these tools to the safety managers in the field so that they can improve the tasks by themselves.

• 한국산학기술학회논문지
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• 제16권3호
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• pp.2012-2019
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• 2015

본 연구의 목적은 세 가지 가방 휴대 방법에 따라 세 가지 가방의 무게를 달리하여 보행하는 동안 신체의 압력중심점의 변위와 보행률의 변화를 분석하고자 2013년 6월 3일부터 2014년 1월 20일까지 시행하였다. 38명의 건강한 성인(평균 연령: $26.10{\pm}5.32$세, 연령 범위: 22-30세)이 본 연구에 참여하였다. 첫 번째 조건은 한쪽 어깨에 가방을 메고 보행하였고, 두 번째 조건은 한쪽으로 가로질러 가방을 메고 걸었으며, 세 번째 조건은 양쪽 어깨에 가방을 메고 걸었다. 보행의 운동 형상학적 변수와 보행 시 압력중심점의 변위를 측정하기 위하여 3차원 동작분석기와 지면 반력기를 사용하였다. 각 세 가지 조건에 모든 대상자가 참가하였고, 모든 대상자는 각각 세 가지 조건에서 3kg, 5kg, 7kg의 무게를 지닌 가방을 휴대하여 6m를 걸었다. 본 연구 결과, 양쪽 어깨로 가방을 메고 걸을 때 3kg, 5kg, 7kg의 가방의 무게에 따라 전-후 및 내측-외측 방향의 압력중심점과 보행률 변수에서 통계학적으로 유의한 차이가 있었다. 따라서 양쪽 어깨에 가방을 메고 걷는 것이 다른 조건보다 더 효율적으로 보행할 수 있을 것으로 사료된다.

• 복식문화연구
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• 제31권2호
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• pp.262-276
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• 2023

This study aims to develop a multi-functional cage for dogs as a house to reduce their anxiety when they go out using cages. This study investigates the types and characteristics of cages and cage preference by surveying men and women in their 20s who use them. The cage product reviews are also analyzed. The research results are as follows: First, domestic dog cages are classified into crate, shoulder, cross (sling bag), backpack, carrier, and stroller types. The crate type is easy to clean and can be used as a house, but it is bulky and therefore inconvenient to carry when using public transportation. The shoulder type is a fabric material with good air permeability but has the disadvantage of being easily soiled. It can be used as a house and is light weight, making it convenient when using public transportation. Second, as a result of consumer research, respondents prefer the shoulder-type fabric over the crate-type plastic material. Third, from the shoulder-type product review, the shape stability, companion dogs' psychological safety, the wearability of companions, and management convenience are derived. Fourth, based on the survey results, a multi-functional cage is developed taking into account the companion dog, companion person, and functional factors.