White Winter Scene after Heavy Snowfall

Importance of autumn Arctic sea ice to northern winter snowfall.

In their contribution to PNAS, Liu et al. (1) suggested that the recent decline of Arctic sea ice has played a critical role in recent cold and snowy winters in the Northern Hemisphere (NH). This study is very interesting, but we believe it deserves several clarifications. First, in 2010, Wu et al. (2) discovered the importance of autumn Arctic sea ice in triggering regional cold extremes; for ...

Winter Corporation/White Paper

Longitudinal changes in white matter microstructure after heavy cannabis use

Diffusion tensor imaging (DTI) studies of cannabis users report alterations in brain white matter microstructure, primarily based on cross-sectional research, and etiology of the alterations remains unclear. We report findings from longitudinal voxelwise analyses of DTI data collected at baseline and at a 2-year follow-up on 23 young adult (18-20 years old at baseline) regular cannabis users an...

Crime Scene or Event Scene?

This article has not an abstract

Nonlinear Robust Velocity Estimation of Vehicles from a Snowfall Traffic Scene

This paper discusses a novel robust velocity estimation method for moving vehicles in road traffic image sequences under snowy and misty weather conditions. In such environments, it is difficult to detect the velocity of vehicles because of discontinuities, occlusions, noise, and brightness variations. It should also be noted that falling snow results in indefinite shapes and motion, which occl...