• Title/Summary/Keyword: drowsiness

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Factors Related to Substantial Pain in Terminally Ill Cancer Patients

  • Suh, Sang-Yeon;Song, Kyung-Po;Choi, Sung-Eun;Ahn, Hong-Yup;Choi, Youn-Seon;Shim, Jae-Yong
    • Journal of Hospice and Palliative Care
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    • v.14 no.4
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    • pp.197-203
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    • 2011
  • Purpose: Pain is the most common and influential symptom in cancer patients. Few studies concerning pain intensity in the terminally ill cancer patients have been done. This study aimed to identify factors related with more than moderate pain. Methods: This study used secondary data of 162 terminal cancer inpatients at the palliative ward of six training hospitals in Korea. Physician-assessed pain assessment was by 10 point numeric rating scale. Substantial pain was defined more than moderate intensity by the Korean National Guideline for cancer pain. The Korean version of the MD Anderson Symptom Inventory was self-administered to assess symptoms. Survival prediction was estimated by the attending physicians at the time of admission. Results: Less than six weeks of predicted survival and more than numeric rating of six for worst drowsiness in the previous 24 h were significantly related to substantial pain (P=0.012 and P=0.046, respectively). The dose of opioid analgesics was positively related to substantial pain (P=0.004). Conclusion: Factors positively related to substantial pain were less than six weeks of predicted survival and considerable drowsiness. Careful monitoring and active preparation for pain are required in terminal cancer patients having those factors.

Analysis of the Eye Blink in Video Sequences (연속된 영상 프레임에서 눈의 깜빡임 해석)

  • 차태환;김주영;고광식
    • Proceedings of the IEEK Conference
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    • 2000.09a
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    • pp.331-334
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    • 2000
  • This paper presents the method for the decision of eye states using the eye blink in video sequences. The entire procedure consists of two steps: in the first step, the accurate eye position is found in the input image by using symmetry information of faces and projection, and in the second step, the eye open/close state is decided by the horizontal and vertical projection. The method in this paper is also used for detecting drivers' fatigue in the drowsiness detection system.

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Apparatus for massaging of the principle ni,n of the human body in cushion for chair (노화방지용 좌욕기 장치개발)

  • 박노국
    • Proceedings of the Safety Management and Science Conference
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    • 2003.05a
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    • pp.143-147
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    • 2003
  • This study is to develop a device of bath-seat with massage which is attached to bath-seat and is able to sustain massage on perineal region and anus effectively. And also develop new programmed driving-seat that is able to protect drowsiness. This seat is operated easily by user controlling time period (eg. 30 minutes or 60 minutes) of vibration. During the vibration, user can make a choice of making n sound which is proved as a better effects for concentration and comfort.

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A study on compensation of arousal level criteria (각성도 평가기준 보상법에 대한 연구)

  • Ko, H.W.;Kim, Y.H.;Lee, G.K.
    • Proceedings of the KOSOMBE Conference
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    • v.1996 no.11
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    • pp.86-89
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    • 1996
  • This paper describes compensation method to evaluate arousal level in different initial arousal state. Arousal level was measured by the relationship between IRI and Nz. The value of Nz is affected by BI which is variable with initial drowsiness. we introduced a correction factor to compensate these differences.

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A pressure sensor system for detecting driver's drowsiness based on the respiration Paper Template for the KITS Review (호흡기반 운전자 졸음 감지를 위한 압력센서 시스템)

  • Kim, Jaewoo;Park, Jaehee;Lee, Jaecheon
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.12 no.2
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    • pp.45-51
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    • 2013
  • In this paper, a driver's drowsy detection sensor system based on the respiration is investigated. The sensor system consists of a piezoelectric pressure sensor attached at the abdominal region of the seat belt and a personal computer. The piezoelectric pressure sensor was utilized for the measurement of pressure variations induced by the movement of the driver abdomen during breathing. The signal processing software for detecting driver's drowsiness was produced using the Labview. The experiments were performed with 30 years male driver. The amplitude of the respiration at awake state was larger than one at the drowsy state. On the contrary, the respiration rate at awake state was lower than one at the drowsy state. The drowsy detection sensor system developed based on the experimental could successfully detect the driver's drowsy on real-time.

Development of SSVEP-based drowsiness extermination road facility (SSVEP 기반 졸음 퇴치 도로시설물 개발)

  • Han, Hyungseob;Ryu, Janghyub;Chong, Uipil
    • Journal of the Institute of Convergence Signal Processing
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    • v.17 no.2
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    • pp.77-82
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    • 2016
  • The purpose of this paper is to develop the algorithm of human arousal inducing interface using steady-state visual evoked potential(SSVEP) and its verification through experiments. In order to develop the model, computer-based SSVEP program simulation is preliminary performed. From the results of the simulation, stimulus pattern is decided to checkerboard and SSVEP frequency range is set into beta wave (13~30Hz). After the experiment on proving the effect of SSVEP flashing stimulation while driving by installing it at the location of people mostly falling asleep in the highway, the result confirms that both during the night and the day, after SSVEP flashing stimulation, a wave Beta immediately increases and the subjects keep high stimulation for the 5 minute maintaining stage.

Real-time Intelligent Health and Attention Monitoring System for Car Driver by Measurement of Vital Signal (생체신호 측정에 의한 실시간 지능형 운전자 건강 및 주의 모니터링 시스템)

  • Shin, Heung-Sub;Jung, Sang-Joong;Seo, Yong-Su;Chung, Wan-Young
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2009.10a
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    • pp.545-548
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    • 2009
  • Recently, researches related to automative mechanism have been widely studied to increase the driver's safety by continuously monitoring the driver's health condition to prevent driver's drowsiness. This paper describes the design of wearable chest belt for ECG and reflectance pulse oximetry for $SpO_2$ sensors based on wireless sensor network to monitor the driver's healthcare status. ECG, $SpO_2$ and heart rate signals can be transmitted via wireless sensor node to base station connected to the server. Intelligent monitoring system is designed at the server to analyze the $SpO_2$ and ECG signals. HRV(Heart Rate Variability) signals can be obtained by processing the ECG and PPG signals. HRV signals are further analyzed based on time and frequency domain to determine the driver's drowsiness status.

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A Study on the Characteristics of Each Type of LED Digital Landscape Lighting in Expressway Tunnel (고속도로 터널 내 LED Digital 경관조명 디자인의 유형별 특징 비교 연구)

  • Hwang, Ye-Jin
    • Journal of Digital Convergence
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    • v.19 no.12
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    • pp.457-462
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    • 2021
  • As South Korea is a mountainous topography, installation of tunnel is essential for construction of expressway in straight lines. According to "2019 Road Bridge and Tunnel Status Report", there are 2,682 tunnels in Korea with total length of 2,077km. Tunnels take up 1.9% of total road length and the number of tunnel increased by 94% with 1,300 newly constructed tunnels over the 10 years. According to domestic and foreign researches, a long tunnel over 1km in expressway has dark lightings and monotonous wall design which decrease driver's concentration and make the driver feel bored. This leads to feeling fatigue and drowsiness more easily. In response, Korea Expressway Corporation installed design lighting that increases attentiveness on 10 tunnels with total length over 3km by 2020. To reduce the risks of accident that may happen inside the tunnel, this study conducted a comparative analysis on characteristics of each type of LED landscape lighting installed inside the expressway tunnel. The study aimed on providing the basic material for effective installation of LED landscape lighting for securing driving stability, reducing fatigue, and lowering the risk of drowsiness.

Evaluation of arousal level by EDA and fuzzy inference (피부전기 활동과 fuzzy추론에 의한 각성도의 평가)

  • Kim, Yeon-Ho;Ko, Han-Woo;Yoo, Jun
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.1856-1859
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    • 1997
  • This paper describes the arousal measurement and the control system using fuzzy logic to prevent drowsy driving. Sugeno's method was used for fuzzy inference in this study. Membership function and rule base were determined form the modfied arousal level criteria. The output of fuzzy inference tracked well the change of subject's arousal level. When IRI(Inter-SIR interval) was under the 60sec, maximum output of three step warning method was medium sound, but that of fuzzy logic system was changed from medium to big. Furthermore, the output of the fuzzy inference was highly correlated with $N_{z}$(r=0.99). Therefore, the fuzzy inference method for evaluation and the control of arousal will be more effective at real driving sityation than three step warning method.ning method.

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