• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.418-420
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• 2021

In the 21st century, computers are useful tools for our lives. However, such computers are difficult to use because they are inputted with a mouse and keyboard. The goal of this paper is to design and implement a 'foot keyboard' that can be typed using pedals and using the "cheonjiin" input method with minimal foot movement so that even people with impaired hands can use the computer comfortably.

• Journal of the Ergonomics Society of Korea
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• v.35 no.3
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• pp.175-184
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• 2016

Objective: In this study, two types of foot-controlled mouse devices are compared with a hand mouse in the input tasks requiring repetitively switching between a keyboard and a mouse. Background: Foot-controlled mouse devices have been developed for persons with impairments in the mobility of their hands. However, some researchers insisted that the foot-controlled mouse devices could be effectively used by the persons with no limits to their hand mobility. There are needs to investigate the efficiency of the foot-controlled mouse devices, when they are used by the nondisabled people. Method: Participants conducted the input tasks, requiring repetitive switches between a keyboard and a computer mouse. The used computer mouse devices were two types of foot-controlled mouse and a typical hand mouse. Participants performed three types of input task for five days and three types of task performance were measured; the number of completed input tasks within a given practice time, subjective satisfaction level and the time wasted for the mouse control. Results: For five days, the performance of input tasks sharply increased in input tasks by foot-controlled mouse devices rather than a hand mouse. After five days, the level of satisfaction on the foot-controlled mouse devices approached to about 76% of a hand mouse satisfaction level. The control time of the foot-controlled mouse devices also approached to about 109% of a hand mouse control time. Conclusion: After only five-day practice, the input task performance by foot-controlled mouse devices approached to that of a hand mouse. This result may suggest that the foot-controlled mouse devices can be effectively used as an alternative input device for the nondisabled people, if input tasks are easy and enough practice time is provided. Application: The results of this study might help to design foot-controlled mouse devices and to expend the usage of them.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.8
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• pp.1849-1854
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• 2010

As for information system in hospital which digital hospital aims at, there are PACS(Picture Archiving and Communication System) and soon. PACS transfer and store various medical pictures which are occurring in hospital. The various medical pictures is captured by using keyboard or foot switch during a surgical operation. In this paper, foot switch USB module that can be mounted into a main foot switch case is designed and implemented, it is having a MCU circuit with a built-in micro-controller and a I/O interface having a maximum of five switch. we also developed foot switch control software program with various functions. The result of using the module in the hospital field confirms that the module operates safely.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.7
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• pp.3037-3047
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• 2012

This study is the investigation research to look into rest, computer work environment and muscle and bone symptom of high school students in some area. With high school students in K area as the object the questionnaires of self-writing type were distributed and the final 685 copies were collected and material analysis was carried out. In the differences between work posture and environment evaluation score following whether or not of pain existing of the each part of pain, the score of the persons who do not have pain was significantly higher than the score of the persons who have pain. The negative correlation between the part of pain and work environment was in desk(shoulder), chair(neck, shoulder, back, and ankle/foot), monitor(shoulder, back) keyboard (neck, shoulder, and ankle/foot) appeared as the result. Controling monitor and chair environment is help to alleviate neck pain and ankle/foot pain respectively. Therefore, computer work environment and bone and muscle symptom have relations and as the use of computer increases, prevention program which can relieve muscle and bone symptom by improving computer work environment is necessary.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.324-327
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• 2006

The person who gets a ALS(Amyotrophic Lateral Sclerosis) has language disability and physical disability together. A common first symptom is a painless weakness in a hand, foot, arm or leg, which occurs in more than half of all cases. Other early symptoms include muscle weakness of speech. In the early stage of this disease they can communicate with other persons, but it will become increasingly difficult. In our research we have designed and implemented communication tools for them. We have implemented Chunjiin(the Korean computer keyboard) at PDA(personal digital assistant). And we have also implemented software which is consisted of frequently used words.