• 대한인간공학회지
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• 제13권2호
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• pp.13-24
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• 1994

The objectives of this study are twofold : (1) to investigate musculoskeletal discomfort for sedentary workers in offices ane (2) to revise the Korean Standard for the design of office chairs in order to reduce or eliminate the physical discomfort or the office workers. Two hundred seventy-one office workers from nineteen different companies companies were selected to evaluate the musculoskeletal discomfort and indibidual features of chair design. A statistical analysis of the survey rebealed that the office currently being used had two major deficiencies such as insufficient adjustability and inappropriate design specifications in ergonomic sense. A stepwise regression analysis showed that the deficiencies on the musculoskeletal discomfort of the workers. Based on the ergonomic design pronciples, was debeloped to revise the Korean Standard for the design specifications of office chairs. An application of the methodology was made amend the design specifications of the four factors such as seat pan height, seat pan width, and seat pan inclunation. Their effects were evident in the musculoskeletal discomfort of the workers.

• 한국자동차공학회논문집
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• 제25권2호
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• pp.140-148
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• 2017

Accidents involving wheelchair accessible vehicles have been frequently occurring since the introduction of these vehicles in the Korean market. However, detailed regulations, which are required to ensure the safety of the wheel-chair occupants, are unavailable. In this study, both domestic and international vehicle safety regulations are analyzed in order to select the regulations that are similar to the transportation environment of Korea. Sled tests with an actual wheel-chair accessible vehicle were carried out based on the analyzed regulation requirements, as well as the values of the HIC, belt loads, dummy movements, and wheelchair movements. The test results showed that the movements of the dummy and the wheelchair did not meet the criteria of the regulation due to the improper positioning of the restraint systems.

• 대한기계학회논문집A
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• 제34권2호
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• pp.167-174
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• 2010

본 논문에서는 사무용 의자의 틸트 동작시 요추지지 기능과 등의 미끄럼을 평가함으로써 등판 회전중심의 최적 위치를 연구하였다. 이를 위해 인체와 의자로 이루어진 수학적 모델을 이용하여 틸트 동작 시뮬레이션을 수행하였다. 착석된 인체 모델의 측면 상에서 고관절 중심을 포함한 42개의 위치에 등판 회전축 위치를 설정하고 각각 시뮬레이션을 수행하였다. 또한 등판의 회전중심이 고관절에 위치한 의자 시작품과 좌판하부에 위치한 기존의 의자에 대해 동작분석 실험도 함께 수행하였다. 시뮬레이션 결과 등판의 회전중심이 고관절 중심에 가까이 위치할수록 틸트시 요추각도 변화량과 등의 미끄럼거리는 작아졌다. 한편 실험결과 착석자의 등과 등판사이의 이격변위와 미끄럼변위는 등판의 회전중심이 고관절 위치에 설계된 시작품에서 더 작게 측정되었다. 시뮬레이션과 실험결과로부터 등판의 회전중심이 인체의 고관절 위치에 가깝게 설계되면 틸트시 착석자의 요추를 효과적으로 지지해 줄 수 있음을 알 수 있었고 이때 착석자는 보다 편안하고 건강한 착석자세를 유지할 수 있다. 이 결과는 사무용 의자에서 등판 회전축 위치의 인간공학적 설계를 위한 가이드라인을 제공한다.

• 한국실내디자인학회논문집
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• 제19권5호
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• pp.105-112
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• 2010

The purpose of this study is to suggest the color scheme based on the color image types through the color analysis of workstation furniture which is on the market. This color scheme of the workstation furniture is expected to be give the comfort to office environment when planning office. For this study, It is selected the three furniture firms that have a brand of office furniture and their web site that is showed color sample of furniture. The following researches are drawn based upon the purpose. First, the color image types of interior space is classified and the color image words that are suitable for each types is extracted based on the results of existing literature. Second, the distribution of its hue and tone is analysed after collecting the each firm's color sample of desk top, panel and chair. Third, the color image appearing in each furniture color is analysed by color image scale positioning. Forth, the color scheme of desk top, panel and chair is suggested by its color scheme palette. The result of this study is expected to help comfortable environment by providing the color scheme for selection of furniture color in work space. Not all color of each furniture is sufficient to be combined color scheme, the result is indicated that the color scheme of workstation by color image types is possible for color planning in office environment.

• 한국실내디자인학회논문집
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• 제14호
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• pp.55-62
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• 1998

One of the major changes in the information era is that the concept of workplace is changing, Therefore this research is to provide basic data for future home office design by surveying office workers's opinions about preferred design for home office. This research is based on a survey of 215 office workers in Seoul. The major findings are ; Office workers prefer an isolated type of workplace that is arranged by U-shped workstation at home. Office workers preferred ivory color of walls and ceiling in home office, Brown color for the floor and brown ivory beige green and grey colors are preferred for the furniture. For home office furniture office workers put to an importance on desk chair computer table cabinet filbox sofa mobil lack credenza, and tea table.

• 대한인간공학회지
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• 제33권4호
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• pp.255-265
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• 2014

Objective: The purpose of this study was to evaluate comfort levels of functional and non-functional chairs using subjective comfort rating, interface pressure measurement, muscle activity measurement, and skin temperature measurement. Background: Chairs are used for a prolonged period of time for sitting in many places such as the office, at university, at school, in industry, and so on. Almost all people use chairs in their everyday life. The functional properties of the chair are associated with comfort. Method: The subjective evaluation contains questions regarding chair comfort which can be rated with five point scale. The body-seat interface pressure was measured using a pressure mat system. The symmetry of sitting was measured using electromyography. The change in body part (thigh and buttock) temperature before and after sitting on a chair was measured with an infrared camera. Results: Participants rated significantly (p < 0.05) higher comfort scores for the functional chair in relation to the buttock and thigh region. Also, the participants felt a better cushion effect in the functional chair. When using the functional chair, lower interface pressure, better thermal comfort, and better symmetry of erector spinae muscle activity were observed. Conclusion: Overall, interface pressure measurement, muscle activity measurement, thermal imaging and subjective comfort score results showed that the functional chair was more comfortable than the non-functional chair. Application: The adopted methodologies could be used to measure the seating comfort of train seats.

• 한국실내디자인학회논문집
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• 제13호
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• pp.249-256
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• 1997

The need of Home-Office is increasing according to the technology and communication system being developed. It is necessary to develop space program and home furniture design for Home-Office. The purpose of this study was to investigate sjpace condition for Home-Office and Home-Office furniture, and to examine preference and opinion on Home-Office. The results this study can be summarized as follows: 1) An isolated space such as a study was the most preferred for Home-Office. The proper size of Home-Office space in residential interior was over 3.3m$\times$3m. 2) The system furniture which is enable to store OA system, and to have efficient work space was preferred. 3) The preferred color of system furniture was natural wood tone, and the most preferred color of chair was blue. 4) It was assumed that the possibility of Home-Office is increased in the new future.

• 한국산업보건학회지
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• 제19권1호
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• pp.16-24
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• 2009

This research aims to measure and analyze the dimensions of typical office chairs and desks sold in domestic market, and to suggest the modifications of national guidelines considering Korean peoples' body characteristics. The scope of this study was limited to the desktop type of computer jobs, excluding laptop environment. The dimensions of 24 different office chairs and 7 tables were measured, and their dimensions were analyzed against the Ministry of Labor (MOL) Notification and Korean Standards (KS). At the same time, the data from the Size Korea was also considered. As a result, the KS guidelines were overall fulfilled by the measured products, while the MOL Notification was not. It was found that the guidelines on the chair height, seat pan depth, lumber support height, and armrest height need to be modified. Some inconsistencies between the MOL Notification and KS were also found. It is suggested that the required dimensions specified by both guidelines should be unified.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1994년도 춘계학술대회논문집
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• pp.86-101
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• 1994

The primary objectives of this research are to survey actual condition and propose the improved standard size for office chairs. In order to accomplish this objectives, questionnaire method was used. The subjects for investigation are 271 office sedentary workers from 19 office workplaces. The survey of a actual condition showed that the office chairs included many contr- oversial points which cause occupational health problems. The main causes of office sedentary worker's health problems are insufficient adjustabilities and inappropriate design specifications. Expecially, insufficient adjustabilities led harmful sitting postures. To improve the existing Korean standard size for office chairs, anthropometric procedure was developed. In this approach, six design factors were determined, that is, seat pan height, seat pan width, seat pan depth, seat pan inclination, armrest height and width. The study found that improved Korean staneard size was strikingly different from existing standard.

• 대한인간공학회지
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• 제34권2호
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• pp.191-198
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• 2015

Objective: As a cue for desired mood, we attempted to identify types of sitting postures when people are involved in various tasks during their working hours. Background: Physical behaviors in reaction to user contexts were studied, such as automated posture analysis for detecting a subject's emotion. Sitting postures have high feasibility and can be detected robustly with a sensing chair, especially when it comes to an office. Method: First, we attached seven sensors, including six pressure sensors and one distance sensor, to an office chair. In Part 1, we recorded participants' postures while they took part in four different tasks. From the seven sensors, we gathered five sets of data related to the head, the lumbar, the hip, thigh pressure and the distance between the backrest and the body. We classified them into four postures: leaning forward, upright, upright with the lumbar supporting, and leaning backward. In part 2, we requested the subjects to take suitable poses for the each of the four task types. In this way, we compared the matches between postures and tasks in a natural setting to those in a controlled situation. Results: We derived four types of sitting postures that were mapped onto the different tasks. The comparison yielded no statistical significance between Parts 1 and 2. In addition, there was a significant association between the task types and the posture types. Conclusion: The users' sitting postures were related to different types of tasks. This study demonstrates how human emotion can interact with lighting, as mediated through physical behavior. Application: We developed a posture-based lighting system that manipulates the quality of office lighting and is operated by changes in one's posture. Facilitated by this system, color temperatures ranging between 3,000K and 7,000K and illuminations ranging between 300lx and 700lx were modulated.