• Analytical Science and Technology
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• v.28 no.4
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• pp.288-298
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• 2015

A distribution study of glitter was conducted from a local university building. The potential recipient surfaces chosen were the 1,000 chairs kept in 16 separate classrooms of the building. The surface of chairs contacting with buttocks and back of users were tape lifted with commercial adhesive tapes, and the surface of adhesive tapes were examined with a stereomicroscope to locate the glitters. 12 glitter particles were found from 11 chairs kept in 16 classrooms of a building. This result indicates that the possibility of glitter finding from Korean violent crime scene is high. The 12 glitters found from the chairs were analyzed with a stereomicroscope and an FTIR spectrophotometer to find the matching glitter. The stereomicroscope was used for the observation of the shapes, dimensions, colors and holograms of each glitter, and the FTIR spectrophotometer was used for the analysis of the chemical composition of the coating material of each glitter. The examination results revealed that 8 glitters out of 12 glitters were not sharing the common origin each other. Also, two glitters found from two separate classroom chairs share common microscopic and FTIR spectroscopic characteristics which indicating two glitters share common origin. The record of the students who had used the classrooms was traced and the authors could find that the classrooms where the same glitters were found were shared by a group of students who listen to the same class. This result implies that the path of the involved people should be considered while assessing the value of trace evidence.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2009.11a
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• pp.140-143
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• 2009

KS G 2010 규격은 학생용 책상 및 의자에 대한 호수와 치수를 규정하고 있다. JIS 를 참조한 이 규격은 지난 10 여 년 간 사용되어 왔는데, 그간 학생집단의 신체 크기가 크게 성장해 이에 대한 검토와 개정이 요청되고 있다. 본 연구는 이러한 개정의 필요성과 방향을 알아보기 위해 초,중,고등 학생들을 상대로 한 설문조사를 계획, 실시하였다. 설문 조사 결과 많은 학생들이 책상과 의자에 대한 많은 불편을 느끼고 있으며, 허리와 엉덩이 등 신체부위에도 불편함으로 느끼는 것으로 조사되었다. 이러한 조사 결과는 학생용 책상 및 의자의 규격 개정 방향에 대한 참조 자료로 사용될 것이다.

• Journal of Korean Society for Quality Management
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• v.29 no.3
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• pp.151-165
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• 2001

The purpose of this study is to develop systematic methods for evaluating the suitability of a seat and build an empirical model for predicting the suitability of a seat. The following research schemes were pursued to achieve the objectives - Development of suitable chair dimensions - Analysis scheme for decomposing the human-product interface system - Development of model for evaluating suitability. As a result, we uncovered six dominant suitability dimensions for the design of a comfortable seat that is related to the physical dimension of a body, Here, six suitability dimensions were identified as the dimensions that represent the human sensitivity and psychological feeling on comfortable seats. Also, 43 human-interface elements (HIE's) such as seat height, seat width, seat depth, tilting angle, seat surface etc. were investigated. HIE was generally defined as the physical characteristic of manufacturing goods, and it had close related to the body dimension of a user and environment that it was used.

• Journal of the Korea Furniture Society
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• v.10 no.1
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• pp.13-21
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• 1999

All chairs are uncomfortable in the long run and some chairs become uncomfortable more rapidly than others. In a particular chair, some people feel more uncomfortable than others. Comfort will depend upon the interaction of chair, user, and task characteristics. In this study, we intended to design a comfortable office chair by investigating anthropometric and biomechanical aspects for Koreans. We determine the design dimensions by analysis the anthropometric data. With these body parameters, we determined the design dimensions such as seat height, seat depth, seat width, seat backrest width, etc. This research, hopefully contributes to the development of ergonomic chair and improvement of the chair design technologies.

• Journal of the Korea Furniture Society
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• v.10 no.1
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• pp.83-93
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• 1999

The purpose of this study is to analyze the issues of today's school furniture systems and propose the new standards for tomorrow's school furniture design. For the improvement of the educational environments, the school furniture need to be reformed very badly. The present educational furniture is very falling behind in safety, function, ergonomics and its aesthetics. The classroom tables and chairs should be comfortable in physical and psychological aspects and accommodates the practical use in order to raise the student's efficiency of learning. In this study, the new design and ergonomic standards of the chairs and tables are proposed by comparing other national standards and analyzing the problems of the present educational facilities.

• Journal of the Korea Furniture Society
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• v.28 no.4
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• pp.314-325
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• 2017

Hans Wegner, one of the legendary designers who led the 20th century Nordic modern design, is a representative furniture designer of Danish Modern. His beautiful proportions, elaborate structure, lightweight and simple chairs show the essence of Danish modernism for mass production. Designed and built over 500 chairs, he demonstrated the essence of chair design through a fully structured prototype. He shows his passion and craftsmanship as a designer through over 1000 designs. In addition, chair design shows the value of timeless design and is loved by modern times. Therefore, this study aims to study the characteristics of chair design by Hans Wegner and to help furniture design education by analyzing design, structure, function and material.

• Korean Institute of Interior Design Journal
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• no.7
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• pp.87-96
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• 1996

In today's man's domestic environments, the development of furnishings in their various shapes and functions is as complex as human lives. Architecture, Interior, and Furniture, each one of these have the relationship closer and closer to the direct human environments. In this study, by choosing the theme of sitting , the transformation of man's behavioral models would be examined in sociological terms. By viewing the chair as an emblematic objects made for more than just sitting, the chair has revealed the relations of man with his environment since the history of furnishings began. Qualified architects and designers know that chairs are no longer the objects, but the primary subject of furnishings. Through this examination of the emblematic typologies of periodic chairs in the history of the Western culture, in terms of their relationships with politics , religions, monarchies, societies, and etc., the meaning of the designs could be find and which could be the resolutions for the future innovative design. These refound or recreated meanings in the history of design could create another typology for the future reality.

• Journal of the Ergonomics Society of Korea
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• v.13 no.2
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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.

• International Journal of Safety
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• v.4 no.1
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• pp.27-31
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• 2005

This study presents the relationship between the height of the chair and the force of deltoid muscle for pianist. The subject simulated playing the piano on the three different heights of the chairs. Digital camera was used to determine the angle of the joint of shoulder and elbow for 2-dimensional static link segment modeling in the sagittal plane. The deltoid, biceps and triceps muscles were considered to determine the muscle load. The results, compared to the force of deltoid muscle, are that the downward position of the higher chair produces significantly large force than the other two lower chairs. It can be caused by hunched shoulder with decreasing deltoid angle. In case of the upward position caused by the lower chair, even though the smallest force of deltoid presented, it was increased the force of elbow.

• Proceedings of the KSME Conference
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• 2000.11a
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• pp.376-380
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• 2000

All chairs are uncomfortable in the long run, but some chairs become uncomfortable more rapidly than others, and in any particular chair, some people will be more uncomfortable than others. Comfort will depend upon the interaction of chair characteristics, user characteristics, and task characteristics. In this study, we intend to design the comfortable office chair by investigating the anthropometric and biomechanical aspects for Korean. Therefore, we determine the design dimensions using the analysis of anthropometric data. With these dimensions, we design the chair mechanism of which backrest reclines with increasing chair pan declination. This mechanism allows the back to get adequate support at the correct level for any backrest declination. Also, the lumbar support in the backrest descends with increasing backrest reclining. By using this chair, a considerably better sitting posture can be obtained, and uncomfortable feeling and back pain may be prevented.