OBJECTIVES Unhelpful beliefs about sleep have been linked to insomnia, and increasing one's cognitive flexibility about sleep has been linked to posttreatment sleep improvement. This study evaluated whether levels of such beliefs differ across insomnia groups and whether there are particular beliefs that differ for specific insomnia subtypes. METHODS Participants (N=1384) were people with ins...

Circadian rhythms influence sleep and wakefulness. Circadian activity rhythms (CAR) are altered in individuals with dementia or seasonal affective disorder. To date, studies exploring CAR and sleep in postpartum women are rare. The purpose of this report is to describe relationships between CAR, sleep disturbance, and fatigue among 72 first-time mothers during their second week postpartum while...

PURPOSE/OBJECTIVES To distinguish relationships among subjective and objective characteristics of sleep, mood, and quality of life (QOL) in patients receiving treatment for lung cancer. DESIGN Descriptive, correlational study. SETTING Two ambulatory oncology clinics. SAMPLE 35 patients with lung cancer. METHODS The following instruments were used to measure the variables of interest: Pi...

PURPOSE To characterize sleep patterns and predictors of poor sleep quality in a large population of college students. This study extends the 2006 National Sleep Foundation examination of sleep in early adolescence by examining sleep in older adolescents. METHOD One thousand one hundred twenty-five students aged 17 to 24 years from an urban Midwestern university completed a cross-sectional on...

BACKGROUND Impaired quality of life (QOL) is an issue considered in patients with multiple sclerosis (MS). There are limited studies evaluated poor sleep and impaired QOL in these cases. The aim of this study was to evaluate quality of sleep and poor sleep in Iranian patients with MS and the relationship between Pittsburgh Sleep Quality Index (PSQI) score and QOL subscales. METHODS One-hundre...

BACKGROUND An inverse relation between sleep duration and body mass index (BMI) has been shown. OBJECTIVE We assessed the relation between changes in sleep duration and changes in body weight and body composition during weight loss. DESIGN A total of 98 healthy subjects (25 men), aged 20-50 y and with BMI (in kg/m(2)) from 28 to 35, followed a 2-mo very-low-energy diet that was followed by ...

Abstract Introduction Sleep spindles are neural oscillations of frequency between 11 to 16 Hz during non rapid eye movement sleep. They coordinated with hippocampal ripples and slow facilitate memory consolidation by modulating synaptic plasticity. Fast spindles, predominant in central parietal derivations EEG Stage 2 NREM sleep, associated overnight visuomotor skills enhancement, especially th...

In North America, most rail corridors are constructed using ballasted track. Monitoring the ballast support condition and improving upon current sub-structure/ballast maintenance strategies will ensure safe railroad operations. However, it is inherently difficult to evaluate the pressure distribution at the sleeperballast interface. Researchers at University of Illinois at Urbana-Champaign (UIU...

The load generated during train operation is transmitted to sleepers through rails, and then from trackbeds. As one of the important components track structure, are very service-life safety railways. running speed will produce different frequencies on rails. To explore response under cyclical loads, this research used discrete element method simulate rails sleepers, realizes loading by applying...

INSOMNIA IS A HIGHLY PREVALENT FORM OF SLEEP DISTURBANCE THAT COMPROMISES THE HEALTH STA TUS, occupational pursuits, and social functioning of countless individuals worldwide.1-6 Whereas insomnia commonly results from medical, psychiatric, and substance-abuse disorders, a substantial subset of insomnia sufferers experience sleep problems which develop and persist independent of such causes. Man...