Publications by authors named "S Scholes"
Midlife heart rate variability and cognitive decline: A large longitudinal cohort study.
Int J Clin Health Psychol
November 2024
Background: Autonomic dysfunction is common in dementia, yet its contribution to neurocognitive changes remains unknown. We investigated whether midlife cardiac vagal modulation, indexed by heart rate variability, associates with subsequent cognitive decline in adults without prior coronary heart disease or stroke.
Methods: The sample comprised 2702 (1924 men) individuals initially aged 44-69 years from the UK Whitehall II cohort.
Article Synopsis
- This paper introduces a Bayesian method that allows single photon avalanche diode (SPAD) arrays to act as pseudo event cameras, capturing changes in light and depth within a scene.
- The method utilizes a changepoint detection strategy to convert direct time-of-flight (dToF) data from SPAD arrays into event streams that report changes in intensity and depth.
- It demonstrates that this integration can enhance active neuromorphic 3D imaging by reducing output redundancy and effectively capturing variations in scene depth through experiments with both synthetic and real dToF data.
Spatially structured optical modes exhibit a group velocity lower than c, resulting in a measurable temporal delay with respect to plane waves. Here, we develop a technique to image this temporal delay and measure it across a set of optical modes. An inevitable consequence of spatially varying delay is temporal broadening of the mode.
View Article and Find Full Text PDFNon-Line of Sight (NLOS) imaging has gained attention for its ability to detect and reconstruct objects beyond the direct line of sight, using scattered light, with applications in surveillance and autonomous navigation. This paper presents a versatile framework for modeling the temporal distribution of photon detections in direct Time of Flight (dToF) Lidar NLOS systems. Our approach accurately accounts for key factors such as material reflectivity, object distance, and occlusion by utilizing a proof-of-principle simulation realized with the Unreal Engine.
View Article and Find Full Text PDFObjective: The objective of this study was to quantify changes over time in waist circumference (WC) relative to BMI by sex in the Americas (United States, Mexico, Chile, and Peru) and England.
Methods: Data from adults aged 25 to 64 years between 1997 and 2020 were analyzed, and US data were stratified by race and ethnicity groups. Sex-specific BMI and WC means and obesity and abdominal obesity prevalence were compared between the first and last surveys.