• Journal of rehabilitation welfare engineering & assistive technology
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• v.7 no.2
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• pp.63-68
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• 2013

Manual wheelchair is one of the most used assistant device in Korea and the size of the wheelchair is defined as KS P ISO 7176-5 which follows the ISO 7176-5 standard size. But the standard often doesn't fit to Korean people because the ISO was enacted by foreigners' body sizes. Actually the result of survey from the Korean Agency for Technology and Standards showd that the designated sizes of height, width, deep of seat except armrest and the height of backrest of a chair in the present KS P ISO 7176-5 are much bigger and the height of armrest is smaller than the sizes investigated by the survey. In case the disabled person has a long wheelchair use time everyday, the posture of user should be uncomfortable because the mismatched size should cause user's pelvis rotations, slouching pose and low stability. Also, inside of knee may touch the wheelchair seat and user can't keep a correct posture. In this paper, the body sizes of Korean disabled person were investigated and the correct wheelchair sizes for Korean people are provided.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.5 no.1
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• pp.17-25
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• 2011

This paper aims to find the optimal control gain for enhancing the convenience of electric walking frames and design a control algorithm. With the recent advances in medical technology, there has been a rapid increase in the aging population and a variety of mobile walking frames have been developed for improvement of the quality of life. However, the manual walking frames of such mobile aids don't have any electric motor which helps facilitate elderly users' walking and thus are not efficient enough for the old people of weak strength to use especially when moving on uneven surfaces such as slopes or thresholds. The types of electric walking frames have been developed to overcome such inefficiency. Electric walking frames require users' control operations for motor driving unlike manual frames. Therefore, when they are not properly handled, it causes considerable inconvenience to their users. The present study compared the electric walking frames with manual ones in terms of operational convenience and attempted to improve the user convenience of walking frames varying the control value for user convenience based on certain standards. This paper presented a haptic sensor designed to recognize the will to walk and measure the degree of convenience and proposed a control algorithm for improvement of convenience. For user convenience, this paper evaluated the relative convenience of walking frames in view of changing differences between the center of vehicle (COV) and the center of position (COP). With the employment of an electric walking frame and a new measuring method, all the processes were experimentally tested and validated.

• Journal of KIISE:Software and Applications
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• v.31 no.4
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• pp.447-456
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• 2004

Information extraction is a process of recognizing and fetching particular information fragments from a document. In order to extract information uniformly from many heterogeneous information sources, it is necessary to produce information extraction rules called a wrapper for each source. Previous methods of information extraction can be categorized into manual wrapper generation and automatic wrapper generation. In the manual method, since the wrapper is manually generated by a human expert who analyzes documents and writes rules, the precision of the wrapper is very high whereas it reveals problems in scalability and efficiency In the automatic method, the agent program analyzes a set of example documents and produces a wrapper through learning. Although it is very scalable, this method has difficulty in generating correct rules per se, and also the generated rules are sometimes unreliable. This paper tries to combine both manual and automatic methods by proposing a new method of learning information extraction rules. We adopt the scheme of supervised learning in which a user-interface agent is designed to get information from the user regarding what to extract from a document, and eventually XML-based information extraction rules are generated through learning according to these inputs. The interface agent is used not only to generate new extraction rules but also to modify and extend existing ones to enhance the precision and the recall measures of the extraction system. We have done a series of experiments to test the system, and the results are very promising. We hope that our system can be applied to practical systems such as information-mediator agents.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.6
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• pp.805-814
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• 2013

This paper proposes a robust hand segmentation method using view-invariant characteristic of a wrist-mounted camera, and deals with a hand shape recognition system based on segmented hand information. We actively utilize the advantage of the proposed camera device that provides view-invariant images physically, and segment hand region using a Bayesian rule based on adaptive histograms. We construct HSV histograms from RGB histograms, and update HSV histograms using hand region information from a current image. We also propose a user adaptation method by which hand models gradually approach user-dependent models from user-independent models as the user uses the system. The proposed method was evaluated using 16 Korean manual alphabet, and we obtained increases of 27.91% in recognition success rate.

• Therapeutic Science for Rehabilitation
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• v.12 no.3
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• pp.33-44
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• 2023

Objective : The purpose of this study was to identify the risk factors for shoulder pain in manual wheelchair users with spinal cord injuries and to explore the correlation between shoulder pain and quality of life. Methods : Out of 182 participants initially included, 168 were selected for analysis. The questionnaire had 41 questions, with 15 on the Wheelchair User's Shoulder Pain Index (WUSPI) and 26 on the World Health Organization Quality of Life-BREF (WHOQOL-BREF). Results : It was found that participants' scored 50.75 in the WUSPI, whereas they scored higher in mobility and overhead activity. In addition, participants' WHOQOL-BREF scored 70.48, with a mean score of 2.71, which was lower than ordinary adults' WHOQOL-BREF (mean: 3.11) and that of older people suffering from chronic musculoskeletal system pain (total score: 77.92). Conclusion : The participants' WUSPI showed negative correlations with all items, including the total scores on the WHOQOL-BREF. This suggests that the participants' shoulder pain had a negative impact on their quality of life. Therefore, clinical experts, including occupational therapists, should provide manual wheelchair users with spinal cord injuries with programs aimed at preventing and managing shoulder pain, thereby contributing to improving their quality of life.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2653-2660
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• 2011

Facilities for disabled person are currently required for rolling stock and its requirements are increased. Researching and development to meet these requirements must be necessary. One of them, ramp between platform and train for wheelchair user was developed and applied in real project, the case is described as per the result. The main contents of this paper is for double leaves type wheelchair ramp development operated by manual. This ramp is fixed at floor area of interior with locking device. So operating is allowed for authorized person only. Beside of this, brief comparison with other types will be mentioned.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.1042-1045
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• 1987

This paper describes a User Guidance System that extracts Conceptual Structure from the input sentence by use of en theory and performs Question Answering in Teletex Manual domain. It uses Frame typed knowledge base and Frame recognizer as Link procedure between CD structure and Frame controller.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.707-712
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• 1991

In machining a part in CAD/CAM system, it is required that the drawing information should be automatically generated, modified, deleted, and thus be used as an general information throughout the entire manufacturing process. This research addresses basic entities(point, line, circle, arc) for design feature and combination of this features, based on GT concepts, with minimum user's manual input. This paper deals with the generalization of operating system which can cover the s parts which appears in mechanical part handbook and the basic constitutional part of sold base. The system developed shows a strong application impact on automatic process planning system of medium - size injection sold companies.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.521-524
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• 2009

Everyone can easily acquire learning materials on web environment that rapidly develops. Because the importance of English education has been emphasized day by day, many English education systems are introduced. However, previous most English education systems support only single user mode, and cannot deal with a newly coined word such as 'WIKIPEDIA'. In order to lead a user's learning ability with interest and enjoyment, this paper propose an online English word game system implementing a 'scrabble' board game. The proposed English word game system has the following characteristics. First, the proposed system supports both single user mode and multi user mode with a virtual user based on artificial intelligence. Second, the proposed system can recognize newly coined words such as 'WIKIPEDIA' by using NEVER Open API dictionary. Third, the proposed system offers familiar user interface so that a user can play the game without any manual. Therefore, it is expected that the proposed system can help users to learn English words with interest and enjoyment.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.1541-1544
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• 1997

The rehailitation robot, one of the service robot, is the important area in the service automation. In the paper, we describe the overall configuration of KARES(KAIST Rehabilitation Engineering System), which is an intellingent rehabilitaion robotic system designed to assist the independent livelihood of the handicapped and the eldrly. KARES consists of the 6 degree of freedom robot arm mounted on a wheelchair, the controller ofr the arm, sensors to perceive environment, and user interface. Basic desired hobs in KARES are gripping the target object and moving it to the user's face for eating, drinking, or cooperation work wiht the mouth. Currently, the manual operation of the arm is available for gripping to target objects. The autonomous functionality will be ginven for the facilities of the human operator.