Effects of sleep deprivation on neural functioning: an integrative review

Sleep deprivation has a broad variety of effects on human performance and neural functioning that manifest themselves at different levels of description. On a macroscopic level, sleep deprivation mainly affects executive functions, especially in novel tasks. Macroscopic and mesoscopic effects of sleep deprivation on brain activity include reduced cortical responsiveness to incoming stimuli, reflecting reduced attention. On a microscopic level, sleep deprivation is associated with increased levels of adenosine, a neuromodulator that has a general inhibitory effect on neural activity. The inhibition of cholinergic nuclei appears particularly relevant, as the associated decrease in cortical acetylcholine seems to cause effects of sleep deprivation on macroscopic brain activity. In general, however, the relationships between the neural effects of sleep deprivation across observation scales are poorly understood and uncovering these relationships should be a primary target in future research

A High-Level Synthesis Flow for the Implementation of Iterative Stencil Loop Algorithms on FPGA Devices

The automatic generation of hardware implementations for a given algorithm is generally a difficult task, especially when data dependencies span across multiple iterations such as in iterative stencil loops (ISLs). In this paper, we introduce an automatic design flow to extract parallelism from an ISL algorithm and perform a design space exploration to identify its best FPGA hardware implementation, in terms of both area and throughput. Experimental results show that the proposed methodology generates hardware designs whose performance is comparable to the one of manually optimized solutions, and orders of magnitude higher than the implementations generated by commercial high-level synthesis tools

Cohesion in Exercise Groups: An Overview

The purpose of the present paper is to outline the results from research that has focused on cohesion effects in exercise groups. The review contains six sections. In the first section, the constitutive definition of cohesion is provided and typical operational definitions used to assess the construct in physical activity contexts are outlined. In the second section, the question of whether cohesion is relevant in exercise groups is addressed. In the third section, we focus on the results from research that has focused on individual preferences for group- versus individual-based contexts for physical activity. Finally, the next three sections focus on results associated with the explanation (why is it?), prediction (what will be?), and intervention/control (how can we?) stages of science in relation to cohesion and physical activity-related behaviors, cognitions, and affective responses