Results 171 to 180 of about 618,055 (243)

Evaluation of Human Impact on Sediment Dynamics in an Intensively Managed Agricultural Watershed Using Distributed Modeling

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT By altering hydrological and geomorphological processes at watershed scales, humans have substantially influenced the movement of sediment on Earth's surface. Despite widespread recognition of human impacts on erosion and deposition, few studies have assessed the magnitude of change in watershed‐scale sediment fluxes before and after the ...
Mingjing Yu, Bruce L. Rhoads
wiley   +1 more source

A comparison of established and digital surface model (DSM)‐based methods to determine population estimates and densities for king penguin colonies, using fixed‐wing drone and satellite imagery

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
We used fixed‐wing drones and Beyond Visual Line of Sight flying to create high‐resolution imagery and Digital Surface Models (DSMs) of six large king penguin colonies (colony population sizes ranging from 10,671 to 132,577 pairs) in South Georgia. We used a novel DSM‐based method to facilitate automated and semi‐automated counts of each colony to ...
J. Coleman   +8 more
wiley   +1 more source

Alpine greening deciphered by forest stand and structure dynamics in advancing treelines of the southwestern European Alps

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Multidecadal satellite observations, like those from Landsat, enable the study of vegetation greenness trends at extensive spatial and temporal scales. Alpine ecosystems show significant increases in vegetation greenness, but the ecological processes driving this greening are less understood.
Arthur Bayle   +5 more
wiley   +1 more source

The History of Breast Cancer Early Detection: 1865 - 2020. [PDF]

open access: yesBreast Cancer (Dove Med Press)
Gump FE, Parmar P, Feldman S, Gupta AM.
europepmc   +1 more source

Method on sediment management for restoring the lower reach of the Kelani River, Sri Lanka

open access: yesRiver, EarlyView.
Abstract The present study describes a river channel management method for restoring riverine environments degraded by sand mining in rivers. Specifically, three conditions that must be met for a restored river channel in the lower reach of the Kelani River in Sri Lanka were proposed: (1) flood discharge capacity of the channel for a given flood, (2 ...
Dissanayaka Mudiyanselage Pavithra Sudeshika   +3 more
wiley   +1 more source

Exposing and Challenging “Grit” in Physics Education

open access: yesScience Education, EarlyView.
ABSTRACT In STEM education, grit is increasingly the focus of research, with scholars and educators seeking to develop and test interventions that will enhance persistence. As part of the special issue Centering Affect and Emotion Toward Justice and Dignity in Science Education, in this paper, we use interviews with 12 white physics faculty to show ...
Amy Robertson   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy