• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.2
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• pp.178-183
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• 2013

In this study, we proposed a method for electroencephalogram (EEG) classification using invariant CSP at special channels for improving the accuracy of classification. Based on the naive EEG signals from left and right hand movement experiment, the noises of contaminated data set should be eliminate and the proposed method can deal with the de-noising of data set. The considering data set are collected from the special channels for right and left hand movements around the motor cortex area. The proposed method is based on the fit of the adjusted parameter to decline the affect of invariant parts in raw signals and can increase the classification accuracy. We have run the simulation for hundreds time for each parameter and get averaged value to get the last result for comparison. The experimental results show the accuracy is improved more than the original method, the highest result reach to 89.74%.

• Journal of the Korea Society of Computer and Information
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• v.22 no.6
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• pp.149-156
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• 2017

In this paper, we propose to enhance a Physical working conditions to decrease absence from work. we demonstrated the correlation of worker's absence with various environmental factors in workplace by surveying 6,962 workers. As result, first, concerning exposure to physical work factors, most of them complained of vibration, and concerning exposure to improper working posture, most of them complained of repetitive arm and hand motions. Second, the absence experience had correlations with age, monthly income, smoking, number of employees, long term working, and shift work, and of the physical factors, hand vibration, noise, high temperature, low temperature and improper working posture had correlations with physical pain posture, movement of people and carrying heavy materials. Third, experience of exposure to hand vibration, noise and low temperature of the physical factors had impact on absence, and of the improper working posture, physical pain posture and carrying heavy stuff had impacts on absence. Through this study, it was found that of the work factors of Korean workers, physical factors and improper working posture had impacts on absence. The results of this study confirmed that physical factors and inappropriate working posture among work factors influenced the absenteeism. Therefore, it is required to improve the work environment regarding physical risk factors and prepare a systematic management plan.

• International Journal of Clinical Preventive Dentistry
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• v.14 no.4
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• pp.235-240
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• 2018

Objective: The purpose of this study is to examine about dental hygienists' myofascial pain syndrome, lower back pain, carpal tunnel syndrome (CTS), medial and lateral epicondylitis, hand-arm vibration syndrom and work-related musculoskeletal syndrome (WMSD) experience and hygienists' posture, motion. Methods: The self-administered questionnaire was surveyed from June 1 to September 30 of 2018 targeting 280 dental hygienists in Gyeongnam province and 266 dental hygienists' answers were analyzed. Results: The average daily working hours of a dental hygienist was more than eight hours 59.0%, with an average of 33 patients per day. The average number of patients who receive treatment for more than 30 minutes is 15. The angle of motion of the subjective evaluation was above 60%. Medical position and form of movement were more than 50% above the standard level. Symptoms of posture and motion that cause WMSD were hand-arm vibration syndrome 68.1%, myofascial pain syndrome 58.6%, lower back pain 51.1%, CTS 50.4% in order. Experience WMSD related symptoms which dental hygienists experience were myofascial pain syndrome 92.9%, CTS 57.9%, lower back pain 56.4%, medial and lateral epicondylitis 37.2%, hand-arm vibration syndrome 24.4%. Conclusion: The above results showed the posture and motion of dental hygienists and were found that the experience rate which dental hygienists experience WMSD of myofascial pain syndrome, Lower back pain, and CTS was significantly more than 56%.

• Journal of Korea Society of Industrial Information Systems
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• v.27 no.2
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• pp.53-59
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• 2022

In this paper, a mobile robot capable of remote control is designed in consideration of the user's various work environments. Specifically, a mobile remote work robot that moves in a predetermined direction and can perform a series of tasks in synchronization with the user's hand movements, and a control system and control method for controlling the robot were proposed. It was implemented using a robot hand and a wheel for movement to assist in tasks such as transporting dangerous goods or heavy goods. In order to evaluate the performance of the developed robot, the maximum weight that can be carried by the robot hand and the movable inclination of the robot were tested, and the test evaluation results satisfied most of the targeted design specifications.

• Annals of Clinical Neurophysiology
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• v.4 no.2
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• pp.133-136
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• 2002

Dyskinesia can occur as a neurological abnormality due to stroke, and its incidence in stroke patients is reported to be about 1%. It is possible to classify dyskinesia into one of the morphologic types already classified clinically. However, a specific type of dyskinesia can occur; one which does not fall into the existing morphologic types. We experienced such a case of specific type dyskinesia, which couldn't be classified into the existing classification system. A 50-year-old man visited our hospital due to rhythmic dyskinesia of the right hand, which appeared during the resting state, and had developed one month after left subcortical infarction. Flexion and extension movements of the fingers at 3Hz appeared due to the impatient impulse to move. However, this abnormal movement could be easily suppressed under the patients will. We suggested that the abnormal movement was similar to akathisia from the fact that it occurred due to the internal desire to move and that the patient could suppress dyskinesia. However, the rhythmic tendency and lack of medication history of antipsychotics suggested that the movement was not the typical form of akathisia. The present case may represent a new clinical type of movement disorder developed after stroke. Considering the clinical pattern of the present case and following a review of the literature, we believe that it can be labeled, post-stroke rhythmic akathisia.

• Archives of design research
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• v.19 no.5 s.67
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• pp.105-118
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• 2006

From a general perspective of design history, the design methodology movement is interpreted in relations to the rationalistic and universal characteristics of modernism. This essay explores a historical context of the movement, focusing on its discursive and practical relations to cyborg sciences that has been shaped by the research and development of military technology in Cold War America. The formation of such relations could be largely devided into two processes: One is the process in which methods and techniques of system science that included operation research, system analysis, and system engineering, were appropriated by the first generation methodologists who had tried to establish "the science of design", and the other is the one in which Herbert Simon's studies on problem solving and artificial intelligence became profoundly embedded in theoretical frameworks of design methodology after the first generation. Examining such processes critically, this essay argues that a design process became finally redefined by the third generation methodology, as a 'feedback loop' of circulation of production and consumption, that is, an apparatus of information-processing which gives a concrete form to the "invisible hand" of markets.

• Physical Therapy Korea
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• v.23 no.4
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• pp.1-8
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• 2016

Background: Various methods are used for recovery of knee flexion range of motion (ROM) due to a tightened rectus femoris muscle (RFM) or limited inferior glide of the patella. Stretching methods are common interventions for restoring the tightened RFM length. Also patellar inferior gliding (PIG) technique can recover tightened RFM length too. However, effect of applying the PIG to passive knee flexion (PKF) has not been studied. Objects: The purpose of this study was to investigate the effect of combining PIG with RFM stretching for improving knee flexion ROM in subjects with RFM tightness. Methods: Twenty-six subjects with RFM tightness were recruited. Two different methods of knee stretching were tested: 1) PKF during modified Thomas test (MTT) and 2) PKF with PIG during MTT. The passive stretching forces was controlled by hand-held dynamometer. The knee flexion ROM angle was measured by a MTT with ImageJ software. Differences between the conditions with and without PIG were identified with a paired t-test. Results: The knee flexion ROM was significantly greater for PKF with PIG ($114.44{\pm}9.33$) than for PKF alone ($108.97{\pm}9.42$) (p<.001). Conclusion: A combination of passive knee flexion exercise and PIG can be more effective than PKF in increasing knee flexion ROM in individuals with RFM tightness.

• Phonetics and Speech Sciences
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• v.7 no.1
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• pp.151-163
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• 2015

In this study, we aim to describe kinematic characteristics of Korean /l/-flapping in two speech rates (fast vs. comfortable). Production data was collected from seven native speakers of Seoul Korean (four females and three males) using electromagnetic midsagittal articulometry (EMMA), which provided two dimensional data on the x-y plane. We examined kinematic properties of the vertical/horizontal tongue tip gesture, the vertical/horizontal (rear) tongue body gesture, and the jaw gesture in an /i/-/i/ context. Gestural landmarks of the vertical tongue tip gesture are directly measured. This serves as the actual anchoring time points to which relevant measures of other trajectories referred. The study focuses on velocity profiles, closing/opening spatiotemporal properties, constriction duration, and constriction minima were analyzed. The results are summarized as follows. First, gradiently distributed spatiotemporal values of the vertical tongue tip gesture were on a continuum. This shows more of a reduction in fast speech rate, but no single instance of categorical reduction (deletion). Second, Korean /l/-flapping predominantly exhibited a backward sliding tongue tip movement, in 83% of production, which is apparently distinguished from forward sliding movement in English. Lastly, there was an indication of vocalic reduction in fast rate, truncating spatial displacement of the jaw and the tongue body, although we did not observe positional variations with speech rate. The present study shows that Korean /l/-flapping is characterized by mixed articulatory properties with respect to flapping sounds of other languages such as English and Xiangxiang Chinese. Korean /l/ flapping demonstrates a language-universal property, such as the gradient nature of its flapping sounds that is compatible with other languages. On the other hand, Korean /l/-flapping also shows a language-particular property, particularly distinguished from English, in that a backward gliding movement occurs during the tongue tip closing movement. Although, there was no vocalic reduction in V2 observed in terms of jaw and tongue body height, spatial displacement of these articulators still suggests truncation in fast speech rate.

• Fashion & Textile Research Journal
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• v.17 no.6
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• pp.996-1003
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• 2015

This study aims to examine the effects of the cutting amount at the waistline on the jacket appearance evaluation and movement functionality, and to suggest a proper waistline cutting amount when designing the men's casual jacket for those in their 30's. The researchers prepared 4 kinds of experimental jackets varying the waistline cutting amount: 0.0cm, 0.5cm, 1.0cm, and 1.5cm. The results of the study are as follows: Regarding the front view appearance, the jacket with the 0.5cm cutting amount achieved the highest score (6 out of 9). On the side view and the back view, there was no meaningful difference. However, the jacket with 0.5cm cutting amount achieved the highest score (4 out of 5). On the other hand, on the movement functionality, there was small statistical difference; the 1.5cm experimental jacket received the highest score in the most areas. This is resulted because if the cutting amount was increased, equally with the V-zone area which gives room for movements. This result showed the difference from the previous research of men in their 20’s,where 0.0cm achieved the highest test score for both appearance and movement functionality. Therefore, this study suggests using the 0.5cm and 1.5cm for the waistline cutting amount; for the jacket appearance 0.5cm is the best while the 1.5cm is better for the movement.

• Journal of Korean Physical Therapy Science
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• v.13 no.2
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• pp.85-98
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• 2006

This study was performed to examine the influences of the mental practice to the hemiplegic upper limb motor function improvement. 20 minute neurologic treatment based on the neurophysiological theory, 10 minute activities of daily living training, and 10 minute mental practice 5 times a week were given in turn to the experimental group(N=11). On the other hand 20 minute neurologic treatment, and 10 minute activities of daily living training 5 times a week were given in turn to the control group(N=11). Both Fugl-Meyer Assessment Scale and Manual Function Test were used to evaluate upper limb motor recovery, upper limb motor function and movement ability. And the Motor Activity Log; Amount of Use and Motor Activity Log; Quality of Movement before training, 2 weeks after training, and 4 weeks after training were measured to assess the upper limb motor quantitatively and qualitatively each. The results are as follows. 1) Considering the interactions of the rate of change on the upper limb motor recovery, motor function, movement ability improvement, and qualitative motor improvement in ADL of experimental group and control group, the change rates of experimental group were found to be greater than those of the control group. 2) In experimental group, the higher the achievements were, the better upper motor recovery was.