• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.853-855
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• 2018

현재 맥파(ECG; Electrocardiogram) 및 뇌파(EEG: electroencephalography)의 파형 분석기술은 다양하게 적용되고 있으니 이들을 종합적으로 활용한 개인용 건강서비스 개발은 아직 미비 한 상태이다. 본 논문에서는 측정대상자의 정신적 혹은 육체적 피로도를 나타내는 8가지의 지표로서 집중도, 전두엽 비대칭 정도, 좌우뇌 활성도 대칭 값, 알파파 및 베타파 훈련도 (이상은 뇌파 분석 결과), 스트레스 레벨, 심박 수, 자율신경균형도 (이상은 맥파 분석 결과)]를 개인에게 알려주는 생체정보기반 개인건강 관리 소프트웨어 시스템의 설계 및 개발 결과에 대하여 서술한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.137-140
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• 2008

현대 사회는 육체적·정신적 활동을 많이 요구하게 되며 이러한 현상으로 스트레스의 증가와 이유없는 증후군의 발병이 점차 확대되고 있다. 특히 스트레스로 인한 피로의 누적으로 인체의 혈액 농도 및 순환에 영향을 끼치게 되며 이로 인해 신장의 상태가 악화될 수 있다. 따라서 신장의 이상 유무를 조기에 판단하여 적절한 조치를 취하는 것이 무엇보다 중요하다. 이를 위해 본 논문에서는 신장 질환을 앓고 있는 환자와 정상인을 대상으로 피실험자 집단군을 각각 구성하고 음성 정보의 형태학적 분석과 수치학적 분석을 실험으로 출력하고 결과값에 대해 비교·분석을 행하고자 한다. 최종적으로 실험을 통해 신장과 음성과의 관계를 정립하고자 한다.

• Journal of Preventive Medicine and Public Health
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• v.25 no.4 s.40
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• pp.374-385
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• 1992

Some circadian rhythms can become disorgnized due to rotating shift work. This lack of organization, termed desynchronization, can produce a group of symptoms such as insomnia, GI disturbance and fatigue among many rotating shift workers. The magnitude of these symptoms are influenced by personal and environmental factors and the patterns of shift work. This study was carried out to investigate the subjective symptoms related to rotational schedules of shift work after personal and environmental factors adjusted. 182 male workers in rapidly rotating shift system and 86 male workers in weekly rotating shift system were conducted the questionnaire on personal factors and subjective sleep, GI and fatigue symptoms. Major findings obtained from this study are as follows: 1. The symptoms of 'feeling tired at work' and 'being irritable' were more frequent in weekly rotating shift workers (P<0.05), and the mean of symptom score was significantly higher in weekly rotating shift workers(P<0.01). 2. According to 6 hours of sleeping which is a definite elevation point of fatigue, there was not a significant difference between two groups in sleeping hours. Among workers in rapidly rotating shift system, the mean of symptom score was significatly higher in workers of less than 6 hours of sleeping(P<0.05), but it was not different among weekly rotating shift workers. 3. The symptoms of GI disturbance were more frequent in weekly rotating shift workers but statistically not significant. 4. The positive rate of mental and physical fatigue symptoms were significantly higher in weekly rotating shift workers(P<0.01) and mental and physical fatigue symptoms were more frequent in them (P<0.01). 5. After the effect of the factors that were significantly different between two groups by $X^2-test$ were controlled, the mean score of sleep disturbance was significantly higher in weekly rotating shift workers (P<0.01) and mental physical fatigue symptoms were more frequent in them (P<0.01). Based on these study results, subjective symptoms were more common in the weekly rotating shift workers. In future, medical examination and laboratory test will be also administered to evaluate a more accurate health outcomes and the review of current shift schedules will be required.

• Science of Emotion and Sensibility
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• v.19 no.1
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• pp.3-10
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• 2016

This research was to investigate the effect of fatigue reduction and heart rate recovery (HRR) according to whole body vibration (WBV). 20 healthy participants were recruited and divided into vibration group (VG) and none vibration group (NVG). VG was group with provided vibration and NVG was group without vibration. They exercised slope gait with 8.5 degree and 4km/h during 30min. They rested on the chair type vibrator during 30min. The vibration consists of 10hz as frequency and 5mm as amplitude. We measured the lactate in the blood and HRR before, immediately after exercise and after rest session. The results showed that lactate level in VG the more decreased at 95.2%. The result of HRR was similar including recovery at 50.67% in VG. The WBV with stimulated vessel in muscle assisted the recovery function by reducing the excess post-exercise oxygen consumption (EPOC) quickly and improving blood circulation. The rest with WBV could provide efficient cool-down exercise for elderly and women without other physical activities after exercise.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.429-430
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• 2022

현재 코로나로 인한 각 나라의 입국 제한이 사라지면서 국내외 여행 예약률 증가에 따라 그만큼 비행기 예약도 늘어나고 있다. 그런데 객실 승무원의 근무 환경은 매우 열악하기 때문에 육체적, 정신적 피로를 누적되게 한다. 이는 승객에게 양질의 서비스를 제공할 수 없게 하고 안전사고를 대처하는 데 있어 문제가 된다. 본 논문은 객실 승무원이 스마트폰 앱을 이용하여 편리하게 객실 상황을 확인하고, 원격 제어하며 서빙카트를 조작하여 승객의 주문에 대한 서비스를 제공하는 '원격제어가 가능한 비행기 객실 관리 시스템'을 제안한다. 이 시스템을 이용함으로써 객실 승무원은 객실 상황을 판단하여 즉각적인 대처를 할 수 있고, 항공기 효율적 운용을 위한 안전성과 정시성을 확보하는 데 도움이 될 것이다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.11
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• pp.6782-6792
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• 2014

This study examined the effects of the symptoms of musculoskeletal disorder and the burden of the body on work stress in a university hospital workers. The research surveyed 679 subjects. The relevant factors affecting the job stress were found to be female, young people age group, unmarried, shift work, work more than 8 hours, short experience workers. The work stress was significantly higher in the non-smoker (p=0.000), regular exercise/sports(p=0.022) and non-drinking(p=0.038) groups. In addition, the mental fatigue, presence of musculoskeletal symptoms, fatigue level, and marital status increase the risk of the work stress. The results showed that the burden of the body and musculoskeletal disorders are related interactively with each other.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.171-173
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• 2018

The poor working conditions of transit drivers not only lead to mental stress and fatigue accumulation of workers, but also to the main causes of mass transit accidents. Stress and fatigue accumulation are closely related to the vital signs because they affect the psychological and physical health. In this paper, we designed a digital garment which can measure driver's health condition by measuring electrocardiogram, pulse rate and body temperature. Also proposed a system that transmits the measured bio-signal to the smartphone app via Bluetooth and transmits the current position of the driver to the server by using the built-in GPS of the smartphone, assuming there is something wrong.

• Journal of Korea Society of Industrial Information Systems
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• v.5 no.2
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• pp.1-8
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• 2000

Manual material handling(MMH)is major factor which causing physical injuries of worker at working area and frequency of low back pain(LBP) is increasing industrial accidents. Especially, working in bad circumstance such as farm, orchard, harbor loading and unloading, logging place and mining place which located in inclined slope can cause much possibility of hazard and absence of working balance can cause injuries of musculoskeletal system such as joint, bone, ligament. So, this study used EMG system to measure and evaluate muscle force information and fatigue of worker when lifting on slope. The result of measuring averaged integrated EMG(AEMG) shows multifidus muscle be used more than anything else in force. neck extensors are used at 15°, 20°frequently. generally the AEMG result shows multifidus muscle be used in force. Commonly, muscle fatigue of multifidus is higher than other muscle by analysis mean power frequency(MPF). The result of load sharing rate shows multifidus and erectorspinae which are deep spinal muscles is relatively high and neck extensor is low.

• Journal of Digital Contents Society
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• v.12 no.4
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• pp.467-474
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• 2011

Auditory and language train for the hearing-impaired is an essential course improving conversational capability with non-deaf and accompanying the financial burden and the physical fatigue of parents or a teacher. To reduce these problems, web-based training contents have been developed. But these contents have been developed without consideration of individual difference such as various levels of residual hearing and the learning capability of hearing-impaired. Therefore, it is important that appropriate training progress for each hearing-impaired should be designed by evaluating and analyzing the personal status, residual hearing, learning capability and training achievement. This paper suggests auditory and language training service model for the hearing-impaired, which is planning and managing an auditory and learning training based on personal evaluation. In addition, this paper suggests a design method for a serious game content planing based on this service model.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3376-3382
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• 2014

The system developed inspects automatically defects existing on an inner surface of anodically treated aluminum cylinder-tubes. This system consists of automatic inspection software, and electronic endoscope and a conveyor moving device. By applying the optimal brightness conditions to searching for various defects on the inner surface of cylinder tube, the recognition rate of major defects, such as scratch, oxide and weld line reached 99%. If the present visual inspection process is replaced with the automatic defects inspection system, the physical fatigue of the operator could be reduced and the productivity could be increased. The automatic inspection system developed could also improve the quality of the products.