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.
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Showing 1 to 20 of 280 for “"Time of day"”.
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Time of Day Influences on Gonadotropin Releasing Hormone Neurons
… are typically referred to as the final component of the neuronal network that regulated reproduction. Though it has been known since the 1920's that the decapeptide released by these neuroendocrine cells is the fundamental driver of ovulation in mammalian females, understanding the regulation of …
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Data-Driven Analysis of Time of Day Pricing for Residential Consumers
Time-of-day (or dynamic time-of-use, dToU) pricing is a mechanism by which system operators try to lower stress on the grid in times of high demand. The price for high demand periods is pre-set but the times of day they are applied is dynamic. Data on how residential consumers respond to the …
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Minimizing the Time of Day Effect Through the Use of Background Music
The time of day effect has been said to be involved with optimal arousal levels during an individual's preferred time of day. In the present study, invigorating background music was used to increase the arousal level of older adults in the afternoon in order to minimize the time of day effect that …
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Time of Day and Age Differences in the Components of Working Memory
<p>The present study examined the effects of time of day on short-term memory efficiency in older and younger adults. Forty-five young (18-35 years of age) and thirty-six older (over 60 years of age) adults were selected for participation. Subjects were tested individually at 0900 hrs, 1400 hrs or …
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Time of day effects on language discourse in healthy aging and dementia
… follows a diurnal pattern across one 10-hour day in normal healthy aging individuals (NHA) and individuals with mild to moderate Alzheimer’s disease. Ten healthy older adults; and ten older adults clinically labeled with probable Alzheimer’s disease were recruited for this study. Measurements …
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Influence of the Time-of-Day on Student Performance on Mathematical Algorithms
<p>In the current school climate of standards-based curriculum and the emphasis on measuring student achievement by state-mandated standardized testing, teachers have to carefully allocate instructional time with emphasis on reading and mathematics. The assumption often is that these subjects need …
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An Experimental Study of the Effects of Time of Day on Reading Achievement
This study was undertaken to determine if time of day affects reading achievement of fourth grade children. The study involved 44 fourth grade students from a rural community. The instrument used for reading pretest and posttest scores was the Metropolitan Achievement Test. The Zenhausern …
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How Physical Activity And Time of Day Influence Judgments of Learning and Free Recall
Previous research suggests the existence of a time of day (TOD) effect in cognitive functioning such that people have an optimal time each day during which their cognitive functions peak: typically, older adults peak in the morning and younger adults peak in the evening (May, Hasher, & Stolzfus, …
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Effects of expectancy, food preference and time of day on salivation in cancer patients
The purpose of the present study was to study differences between cancer patients and noncancer patients in taste acuity and in salivation to food and stimuli associated with food. Subjects were twenty male cancer patients and eighteen patients hospitalized for noncancer-related illnesses. All …
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Time of Day Effects on the Performance on the Screening Test of Auditory Processing
<p>The purpose of this study was to determine if any significant relationships existed between time of day and central auditory processing using a screening test of central auditory performance. The study specifically addressed the following research questions: 1. Is there a difference in the …
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Modulating Effects of Time of Day on Age Differences in Memory Performance: Attention Versus Inhibition
… periods correlate with individual patterns of physiological arousal. Recent findings in the literature suggest that the optimal time synchrony may modulate the magnitude of age differences in cognitive performance across time of day. The first goal of the present study was to further …
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Investigations into the influence of sleep, tiredness, time of day, and caffeine on cognitive testing
… subtle external factors may affect the accuracy of test results, if not controlled for, at the time of testing. This thesis investigated the effects of a range of sleep variables, caffeine intake, prior to cognitive testing and current subjective tiredness ratings on several cognitive tests in …
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The Impact Of Time Of Day, Sleep, And Nutrition On Age-Related Changes In Cognitive Performance
… examined how sleep, nutritional intake, and time of day moderate age-related cognitive changes. Research indicates there are cognitive changes associated with healthy aging. Many studies comparing young and older adults have tested participants at the same time of day. More recently, research …
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Being in the right place at the right time : time of day discrimination by pigeons, Columba Livia
… trained to discriminate between four keys, one of which provided food in the mornings, another which provided food in the afternoons, and two which never provided food. Three experiments were performed to determine if pigeons could track food availability over a 24-hr period. In Experiment 1, …
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The effects of time of day and circadian rhythm on performance during variable levels of cognitive workload
<p>The present study examined the effects of time of day of testing on a simulated aviation task. The tasks required the participants to engage in multitasking while electroencephalogram (EEG) data was collected to objectively measure participants’ workload. Task demands were altered throughout the …
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The Effects of Time of Day on Executive Function and Memory in Children with Attention-Deficit/Hyperactivity Disorder
<p>This study examined time of day effects on the performance of executive function and memory tasks in children with Attention-Deficit/Hyperactivity Disorder (ADHD) and non-ADHD children. Previous studies have found that ADHD children performed worse on executive function and memory tasks. Also, …
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Air Traffic Controllers: Flying in the Face of Danger? A Look Into the Effects of the Time of Day
Since the events of September 11, this country has continued to grow and its commercial air travel along with it. As the number of passengers and planes increase, so must the skill and etermination of the air traffic controllers. They must be at their peak performance levels to ensure the flying …
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Biogenic Amine Levels Correlate with Time of Day, Age, Light Cycle, and Aggressive State in the Flesh Fly, Sarcophaga crassipalpis
… (OA) have been indicated in the regulation of behaviors, including aggression. The flesh fly, <em>Sarcophaga crassipalpis</em>, was used to investigate ontogenetic and circadian changes in amines and aggression. Heads of male flies were analyzed for amine content using high performance …
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The MYC transcription factors are involved in regulating the time-of-day variations in susceptibility to Botrytis cinerea in Arabidopsis thaliana
… to pathogens at specific, yet predictable times of the day-night cycle. The circadian clock, an endogenous timing mechanism, allows plants to anticipate recurring changes in pathogen abundance. A recent study showed that in Arabidopsis thaliana (hereafter: Arabidopsis), the circadian clock …
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