Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 94 for “"Alertness"”.
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Räumliche Aufmerksamkeitsausrichtung und Alertness: Interaktion zweier Aufmerksamkeitsnetzwerke?
… regarding the attentional functions of alertness and visuospatial orienting of attention in two empirical studies from different perspectives. The first empirical part of this work was aimed at the analysis and comparison of the functional anatomy of alertness and (overt as well as …
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Visual information processing in various degrees of alertness
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Cognitive energetic mechanisms and neural basis of alertness regulation
… to respond in such tasks has been termed "alertness." This thesis investigates cognitive-energetic mechanisms that contribute to alertness and its decrease over time as well as the neurobiological basis of alertness regulation. The first investigation (Study 1) examined in three 25-min …
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Brain Dynamics When Alertness Fluctuates but Attentional Demands Persist
Alertness waxes and wanes throughout the day. Some tasks demand our unwavering attention, and when alertness dips, we still need to stay focused and engaged. This thesis examines how the human brain functionally reorganises when alertness levels decline but attentional demands persist. We focused …
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Fuzzy Analysis of Speech Metrics to Estimate Crew Alertness
A novel approach for estimating alertness levels from speech and tagging them with a reliability component has been developed. The Fatigue Quotient and Believability are both derived from the time series analysis of the speech signal in the communication between the operator and dispatch. Operator …
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Performance and alertness of railroad engineers on long duration trips
… present study investigated the performance and alertness of 8 healthy male participants between the age of 31 years and 65 years old in nighttime, long duration simulated train operation. Participants completed the simulator tasks twice, once alone (single run) and once with another person in …
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Effects of Screen Light Filtering Software on Sleep and Morning Alertness
… on sleep onset, sleep duration and subjective alertness after morning waking of four college students. The college students were randomized into two groups and had the wavelength filtering software f.lux installed on their computer. Participants in the intervention group had their computer set …
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The effect of Escitalopram on tonic and phasic alertness in healthy volunteers
… study was designed to compare tonic and phasic alertness effects of acute and subchronic treatment with the most selective serotonin reuptake inhibitor available, Escitalopram, in healthy volunteers. Forty healthy volunteers, aged 18 - 39 years, underwent two treatment periods in which they were …
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Slipping into Sleep: neurodynamics of alertness transitions in humans and fruit flies
… this general state of readiness is called as ’alertness’. What happens to neurodynamics in the brain when alertness fades away as we fall asleep? How is behaviour affected? These questions will help us understand the organizing principles in the brain and functions of sleep itself. Here I use …
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Zirkadiane Modulation hochfrequenter SEP-Komponenten (600 Hz) nach Medianusstimulation in Abhängigkeit von tonischer alertness
… Since the thalamus is involved in regulating alertness and arousal, the present study aimed to characterize the effects of circadian fluctuations of alertness on HFOs in awake humans. Bilaterally evoked median nerve SEPs were recorded in 11 healthy human subjects at four time points (day I: 8 …
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An On-Road Investigation of Commercial Motor Vehicle Operators and Self-Rating of Alertness and Temporal Separation as Indicators of Driver Fatigue
… examined the use of self-rating of alertness and temporal separation (minimum time-to-collision, minimum headway, and mean headway) as indicators of driver fatigue. Without exception, the regression analyses for both the self-rating of alertness and temporal separation yielded models …
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Conflict and adaptation: Identifying the markers of cognitive control in the transition from wakefulness to sleep
… and not others. As such, fluctuations in alertness are hypothesised expected to produce a larger effect in those processes that are more reliant on consciousness. In chapter 2 we begin by investigating the effect of alertness on conflict monitoring. Conflict monitoring is the environmental …
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Effects of 8 and 12 hour non-rotating shift schedules for security and protective services workers
… system operation can have an impact on sleep, alertness, and the well-being of shift workers. The objective of this study is to evaluate security and protective services employees working in non-rotating shift systems of 8- hour and 12-hour schedules. New Jersey Institute of Technology’s Public …
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Cognitive consequences of sleep deprivation, shift work, and heat exposure for underground miner
The extent to which an underground miner’s alertness is influenced by sleep deprivation, shift work, and working in elevated temperatures is currently unknown. Actigraphy and psychomotor vigilance data were collected from nineteen underground miners over 28 consecutive days. Core body temperature …
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Ecological Examination of the Development of Color -Blind Racial Beliefs in Black College Students
… unique amount of variance in Cultural Pride and Alertness to Racism racial socialization received from both parents and peers. Additionally, Alertness to Racism racial socialization provided by peers accounted for a significant amount of variance in color-blind racial attitudes. Similarly, Peer …
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Ecological examination of the development of color-blind racial beliefs in black college students
… unique amount of variance in Cultural Pride and Alertness to Racism racial socialization received from both parents and peers. Additionally, Alertness to Racism racial socialization provided by peers accounted for a significant amount of variance in color-blind racial attitudes. Similarly, Peer …
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A comparison of three subsidiary tasks used as driver drowsiness countermeasures
… by which drivers can regain and maintain alertness. The current study was thus undertaken in an attempt to evaluate three subsidiary tasks which differed only in regard to input modality (auditory, tactual, or visual) in terms of: 1) the degree to which they aided the driver by maintaining …
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