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Puslapis 1 nuo 798 rezultatus
A field study of stress and fatigue in long-distance bus drivers.
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Psychophysiological changes during long-distance driving may be associated with driving fatigue and morbidity. Measures of stress and arousal, including heart rate, blood pressure, catecholamines, cortisol, state anxiety, and self-ratings of stress and arousal were collected from 10 long-distance
Symptoms in medical patients: an untended field.
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Somatic symptoms are one of the leading reasons for medical outpatient clinic visits, with the most common symptoms having a prevalence of 10% or more. However, the usual diagnostic workups are often unproductive, with less than 1 in 5 symptoms having an organic explanation after the initial
The effect of caffeine ingestion on field hockey skill performance following physical fatigue.
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This study examined the impact of caffeine ingestion on field hockey skill performance following high-intensity fatigue. Thirteen male hockey players (mean age = 21.1 ± 1.2 years) performed hockey sprint dribble and ball handling tests at rest and after a bout of total body fatigue (90% maximal
Complex Internal Bias Fields in Ferroelectric Hafnium Oxide.
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For the rather new hafnia- and zirconia-based ferroelectrics, a lot of questions are still unsettled. Among them is the electric field cycling behavior consisting of (1) wake-up, (2) fatigue, and (3) the recently discovered subcycling-induced split-up/merging effect of transient current peaks in a
Electric field cycling behavior of ferroelectric hafnium oxide.
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HfO2 based ferroelectrics are lead-free, simple binary oxides with nonperovskite structure and low permittivity. They just recently started attracting attention of theoretical groups in the fields of ferroelectric memories and electrostatic supercapacitors. A modified approach of harmonic analysis
Field studies of comfort and discomfort in sitting.
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A previous study defined sitting comfort and discomfort as independent entities associated with different factors: discomfort is related to biomechanics and fatigue factors, and comfort to a sense of well-being and aesthetics. In this study a checklist for evaluation of chair comfort and discomfort
The role of electromagnetic fields in neurological disorders.
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In the modern world, people are exposed to electromagnetic fields (EMFs) as part of their daily lives; the important question is "What is the effect of EMFs on human health?" Most previous studies are epidemiological, and we still do not have concrete evidence of EMF pathophysiology. Several factors
The effect of pilocarpine on the glaucomatous visual field.
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Patients with chronic open angle glaucoma are traditionally managed by medical therapy during the early stages of the disease. Pilocarpine is a well established topical agent, but suffers troublesome sequelae, the most apparent of which is pupillary constriction. This study assesses the effect of
Extremely low frequency electromagnetic fields prevent chemotherapy induced myelotoxicity.
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Side effects of chemo-radiotherapy reduce the quality and also the survivability of patients. The consequent fatigue and infections, related to myelodepression, act to reduce the dose-intensity of the protocol. Late side effects of chemo-radiotherapy include secondary tumours, acute myeloid
Field trial on the treatment of fasciolopsiasis with praziquantel.
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Eight-five of 816 (10.7%) students attending a primary school in Central Thailand were examined and found infected with Fasciolopsis buski. All of students ate fresh water lily stems and most ate other fresh water plants including caltrop, water cress and morning glory. The 85 students were given
The effect of physical contact on changes in fatigue markers following rugby union field-based training.
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Repeated physical contact in rugby union is thought to contribute to post-match fatigue; however, no evidence exists on the effect of contact activity during field-based training on fatigue responses. Therefore, the purpose of this study was to examine the effect of contact during training on
Electric-field stabilization and competition of gratings in a photorefractive polymer.
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We report observations of electric-field stabilization of gratings and grating competition in a new photorefractive polymer mixture composed of 40 wt. % diethylamino-benzaldehyde-diphenyl hydrazone dissolved in Bisphenol A 4,4'-nitroaminotolane. Gratings formed with a 650-nm optical wavelength in
Magnetic field effects on spatial discrimination and melatonin levels in mice.
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Previous research has demonstrated a decrement in spatial discrimination learning following exposure to a .30 Tesla magnetic field. It had been suggested that those findings might be the result of an interaction between the magnetic field and physiological ferromagnetic material (magnetite). In the
Glutamine and carbohydrate supplements reduce ammonemia increase during endurance field exercise.
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Blood ammonia concentration increases during endurance exercise and has been proposed as a cause for both peripheral and central fatigue. We examined the impact of glutamine and (or) carbohydrate supplementation on ammonemia in high-level runners. Fifteen men in pre-competitive training ran 120 min
Microwave frequency electromagnetic fields (EMFs) produce widespread neuropsychiatric effects including depression.
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Non-thermal microwave/lower frequency electromagnetic fields (EMFs) act via voltage-gated calcium channel (VGCC) activation. Calcium channel blockers block EMF effects and several types of additional evidence confirm this mechanism. Low intensity microwave EMFs have been proposed to produce
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