Abstract Modern wearable devices calculate a numerical metric of sleep quality (sleep feedback), which are intended to allow users monitor and, potentially, improve their sleep. This feedback may have negative impact on pre-sleep cognitive arousal, and subjective sleep, even in healthy sleepers, but it is not known if this the case. pilot study examined poor false feedback, upon arousal continu...

As prestressed concrete sleepers are continuously exposed to various environmental and loading conditions, it is increasingly crucial analyse their current future serviceability performance. In practice, the main cause of cracking in usually induced by impact loads. The most heavily influenced sections midspan rail-seat area sleepers. This paper investigates effects time-dependent strength degr...

BACKGROUND Inconsistent findings in previous studies of the association between sleep duration and changes in body mass index (BMI) may be attributed to misclassification of sleep duration fluctuations over time and unmeasured confounders such as genetic factors. The aim of the present study was to overcome these failings by using repeated measurements and panel data analysis to examine the sle...

OBJECTIVES Several studies have suggested that patients who experience insomnia report a number of significant impairments. However, despite this literature, fewer studies have focused on the burden of insomnia among patients in Japan. The objective of the current study is to extend this work in Japan to further understand the effect of insomnia on health-related quality of life (hrQOL). Furthe...

C ommercially available fiberbased reinforcement for concrete is made of carbon, aramid, or glass filament fibers impregnated in a resin. Some aramid fiber reinforcement consists of aramid filaments without a resin matrix. For general applications, the most important feature of fiber-based reinforcement is its resistance to corrosion, which makes it ideal for reinforcing concrete exposed to hig...

A sensor is a battery-operated small computer with an antenna and a sensing board that can sense magnetism, sound, heat, etc. Sensors in a network can use their antennas to communicate in a wireless fashion by broadcasting messages over radio frequency to neighboring sensors in the same network. In order to lengthen the relatively short lifetime of sensor batteries, each sensor in a network can...

investigations on vibration behaviors of railway track systems were attempted in this research. this was made by conducting a comprehensive field investigation into the free vibration of track systems and response of tracks to train moving loads. in-situ modal analysis was used in a railway track field as an efficient method of investigating dynamic properties of railway track systems. natural ...

Prestressed concrete sleeper is a safety-critical track component widely used in ballasted railway tracks. The performance, endurance and quality of prestressed sleepers can detrimentally affect the serviceability durability track. An optimal production method an important criterion underpinning over entire service life sleepers. At present, research work mainly focuses on dynamic load, bearing...

Study objectives We conceptualized sleep quality judgment as a decision-making process and examined the relative importance of 17 parameters of sleep quality using a choice-based conjoint analysis. Methods One hundred participants (50 good sleepers; 50 poor sleepers) were asked to choose between 2 written scenarios to answer 1 of 2 questions: "Which describes a better (or worse) night of slee...