Why Is Nondipping in Ambulatory Blood Pressure Monitoring Not Prognostic in Poor Sleepers? To the Editor: In another analysis of the Progetto Ipertensione Umbria Monitoraggio Ambulatoriale cohort, Verdecchia et al1 demonstrated that nighttime blood pressure (BP) was higher in poor sleepers and that, in this subset of participants, the incidence of cardiovascular events did not differ between di...

Epidemiological studies suggest that adults and children who are habitual short sleepers tend to have a higher body mass index, fat percentage and abdominal circumference when compared to average-duration sleepers. Reduced or disturbed sleep is also associated with certain predictors of type 2 diabetes, such as glucose intolerance, insulin resistance, reduced insulin response to glucose and a r...

For good sleepers, distal skin temperatures (e.g., hands and feet) have been shown to increase when sleep is attempted. This process is said to reflect the body's action to lose heat from the core via the periphery. However, little is known regarding whether the same process occurs for insomniacs. It would be expected that insomniacs would have restricted heat loss due to anxiety when attemptin...

BACKGROUND The aim of this study was to investigate the effects of sleep duration and bedtime on sperm health, and the possible mechanism involved. MATERIAL AND METHODS We randomly divided 981 healthy Chinese men into groups according to research-set bedtimes (A=8-10 PM, B=after 10 PM, and C=after midnight) and sleep durations: group 1=<6.0 h (short), group 2=7.0-8.0 h (average), and group 3=>9...

Epidemiologic studies have shown that sleep duration is associated with overall mortality. We conducted a systematic review of the associations between sleep duration and all-cause and cause-specific mortality. PubMed was systematically searched up to January, 2008 to identify studies examining the association between sleep duration and mortality (both all-cause and cause-specific) among adults...

 This was an exploratory, descriptive, cross-sectional study to assess sleep quality in 100 patients with venous ulcers using the Pittsburgh Sleep Quality Index (PSQI). Thirty-six (36%) patients had a global PSQI score < 5, indicating that they were good sleepers, while 64 (64%) patients were considered poor sleepers. Fifty-three (53%) patients reported going to bed between 9:00 pm and 11...

Transition zones in railway tracks are locations with considerable changes in the vertical stiffness of the rail support. Typically they are located near engineering structures, such as bridges, culverts, tunnels and level crossings. In such locations, the differential settlement always exists and continually grows without proper maintenance. Due to the effect of the differential settlement and...

• Evaluation of the behaviour a railway track supported by alternative sleepers. Use ballast box test to represent single sleeper section track. Digital Image Correlation technique for measuring sleepers’ deflection profile. Sleepers with low modulus will have W-shape Local deformation at rail seat can account up 10 % total deflection. Alternative technologies replacement timber are made materi...

The wheel-rail-sleepers system is simulated as a series of moving point loads on an Euler–Bernoulli beam resting on a visco-elastic half space. This paper concentrates on the railsleepers interaction system (railway system) and the fault detection. The main objective is to mathematically develop and implement a dynamic model of a railway system then the diagnosis of system defects using a Luenb...