The Experts below are selected from a list of 9954 Experts worldwide ranked by ideXlab platform
Alfred J Lewy - One of the best experts on this subject based on the ideXlab platform.
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low but not high doses of melatonin entrained a free running Blind Person with a long circadian period
Chronobiology International, 2002Co-Authors: Alfred J Lewy, Robert L Sack, Jonathan S Emens, Brant P Hasler, Rebecca A BernertAbstract:In a previous report, we were unable to entrain one out of seven totally Blind people with free-running endogenous melatonin rhythms to 10 mg of exogenous melatonin. This Person had the longest circadian period (24.9 h) of the group. We now find that this Person can be entrained to 0.5 mg of melatonin, but not to 20 mg. These results are consistent with the idea that too much melatonin may spill over onto the wrong zone of the melatonin phase-response curve.
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sleep propensity free runs with the temperature melatonin and cortisol rhythms in a totally Blind Person
Sleep, 1992Co-Authors: Hiroki Nakagawa, Robert L Sack, Alfred J LewyAbstract:Abstract In previous studies, we found that many totally Blind people have free-running melatonin rhythms, but that free-running melatonin rhythms were not necessarily associated with periodic insomnia and daytime sleepiness. Thus, it was not clear if the circadian sleep propensity rhythm was free-running with the other circadian rhythms. In the present study, we report that the sleep propensity rhythm (as defined by an ultrashort sleep-wake schedule) free-ran with the melatonin, temperature and cortisol rhythms in a 44-year-old totally Blind man even though he maintained a conventional sleep schedule and did not complain of clinically significant insomnia or excessive daytime sleepiness.
S. Sivaji - One of the best experts on this subject based on the ideXlab platform.
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Implementation of ultrasonic ranging and fire safety for Blind Person
International Journal of Research, 2016Co-Authors: L. Praveen Kumar, S. SivajiAbstract:This paper shows a method to introduce a mobility aid for Blind Persons by giving alert to Blind Person using voice processor with ear phones. This system is also used in automatic robots, self propelling vehicles in automated production factories etc. This system contains a signal processing unit with LPC 2148 microcontroller. This receives data from serial input/output port and gives alert to Blind people. This paper contains temperature compensation method to reduce the error in measurement of distance using ultrasonic sensors. Signal processing is done using lpc2148 micro controller which is used for interfacing between different sensors and pc. sensor then process it and delivers it to the computer using serial input/output port and gives alert to Blind people. This paper contains temperature compensation method to reduce the error in measurement of distance using ultrasonic sensors. Signal processing is done using LPC 2148 micro controller which is used for interfacing between different sensors and pc. Further received data is verified using MATLAB.
L. Praveen Kumar - One of the best experts on this subject based on the ideXlab platform.
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Implementation of ultrasonic ranging and fire safety for Blind Person
International Journal of Research, 2016Co-Authors: L. Praveen Kumar, S. SivajiAbstract:This paper shows a method to introduce a mobility aid for Blind Persons by giving alert to Blind Person using voice processor with ear phones. This system is also used in automatic robots, self propelling vehicles in automated production factories etc. This system contains a signal processing unit with LPC 2148 microcontroller. This receives data from serial input/output port and gives alert to Blind people. This paper contains temperature compensation method to reduce the error in measurement of distance using ultrasonic sensors. Signal processing is done using lpc2148 micro controller which is used for interfacing between different sensors and pc. sensor then process it and delivers it to the computer using serial input/output port and gives alert to Blind people. This paper contains temperature compensation method to reduce the error in measurement of distance using ultrasonic sensors. Signal processing is done using LPC 2148 micro controller which is used for interfacing between different sensors and pc. Further received data is verified using MATLAB.
Robert L Sack - One of the best experts on this subject based on the ideXlab platform.
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low but not high doses of melatonin entrained a free running Blind Person with a long circadian period
Chronobiology International, 2002Co-Authors: Alfred J Lewy, Robert L Sack, Jonathan S Emens, Brant P Hasler, Rebecca A BernertAbstract:In a previous report, we were unable to entrain one out of seven totally Blind people with free-running endogenous melatonin rhythms to 10 mg of exogenous melatonin. This Person had the longest circadian period (24.9 h) of the group. We now find that this Person can be entrained to 0.5 mg of melatonin, but not to 20 mg. These results are consistent with the idea that too much melatonin may spill over onto the wrong zone of the melatonin phase-response curve.
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sleep propensity free runs with the temperature melatonin and cortisol rhythms in a totally Blind Person
Sleep, 1992Co-Authors: Hiroki Nakagawa, Robert L Sack, Alfred J LewyAbstract:Abstract In previous studies, we found that many totally Blind people have free-running melatonin rhythms, but that free-running melatonin rhythms were not necessarily associated with periodic insomnia and daytime sleepiness. Thus, it was not clear if the circadian sleep propensity rhythm was free-running with the other circadian rhythms. In the present study, we report that the sleep propensity rhythm (as defined by an ultrashort sleep-wake schedule) free-ran with the melatonin, temperature and cortisol rhythms in a 44-year-old totally Blind man even though he maintained a conventional sleep schedule and did not complain of clinically significant insomnia or excessive daytime sleepiness.
Hiroki Nakagawa - One of the best experts on this subject based on the ideXlab platform.
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sleep propensity free runs with the temperature melatonin and cortisol rhythms in a totally Blind Person
Sleep, 1992Co-Authors: Hiroki Nakagawa, Robert L Sack, Alfred J LewyAbstract:Abstract In previous studies, we found that many totally Blind people have free-running melatonin rhythms, but that free-running melatonin rhythms were not necessarily associated with periodic insomnia and daytime sleepiness. Thus, it was not clear if the circadian sleep propensity rhythm was free-running with the other circadian rhythms. In the present study, we report that the sleep propensity rhythm (as defined by an ultrashort sleep-wake schedule) free-ran with the melatonin, temperature and cortisol rhythms in a 44-year-old totally Blind man even though he maintained a conventional sleep schedule and did not complain of clinically significant insomnia or excessive daytime sleepiness.