Sample weighting is widely used in deep learning. A large number of methods essentially utilize the learning difficulty training samples to calculate their weights. In this study, scheme called difficulty-based weighting. Two important issues arise when explaining scheme. First, a unified measure that can be theoretically guaranteed for does not exist. The difficulties are determined by multipl...

Throughout the 24-hour day, the occurrence of sleep and wakefulness is closely related to changes in body temperatures. Changes in skin temperature may causally affect the ability to initiate and maintain sleep. First, we briefly summarize a previously proposed neurobiological mechanism that couples skin temperature to sleep propensity. Next we review previous findings on the relation between s...

OBJECTIVES To advance understanding of the relationship between discrimination and sleep duration and difficulties, with consideration of multiple dimensions of discrimination, and attention to concurrent stressors; and to examine the contribution of discrimination and other stressors to racial/ ethnic differences in these outcomes. DESIGN Cross-sectional probability sample. SETTING Chicago...

Sleep is a critical component of healthy development for youth, with cascading effects on youth's biological growth, psychological well-being, and overall functioning. Increased sleep difficulties are one of many disruptions that adopted youth may face throughout the adoption process. Sleep difficulties have been frequently cited as a major concern by adoptive parents and hypothesized in the li...