Relationship of eco-environmental change with natural erosion and artificially accelerated erosion
The Ziwuling forest area provides research base for tracing back eco-environmental change related to natural erosion and artificially accelerated erosion. Using methods of typical region investigations, in-situ experimental study and chemical
analysis of samples, impact of vegetation destruction and rehabilitation on soil erosion, characteristics of natural erosion under conditions of natural ecological balance and artificially accelerated erosion resulting from vegetation destruction in forest
area, and the processes of artificially accelerated erosion and soil degradation have been analyzed and discussed.
Accelerator dating of a mixed assemblage of late Pleistocene insect fossils from the Lamb Spring site, Colorado
The Lamb Spring insect fauna is a type of assemblage, containing both prairie and alpine tundra species. Accelerator dating of insect fossil specimens from the two ecological groups helped resolve the paleoecological problem. The dates reveal
Radiocarbon dating of pollen by accelerator mass spectrometry
In this study, the AA. demonstrate for the first time the radiocarbon dating of pollen concentrate samples by accelerator mass spectrometry. The dates obtained by this method should provide more reliable radiocarbon chronologies for paleo
Accelerator-mass-spectrometer ages for the Younger Dryas event in Atlantic Canada
The AA. present the first accelerator-mass-spectrometer (AMS) 14C dates from Atlantic Canada, at or close to the boundaries of this late glacial cooling, from six sites in New Brunswick and Nova Scotia. The results place the timing of the Younger
Global sensitivity analysis of a large agent-based model of spatial opinion exchange : a heterogeneous multi-GPU acceleration approach
The objective focuses on the sensitivity analysis of large agent-based modeling of spatial opinion exchange, accelerated using multiple graphics processing units (GPUs). It is conducted using a variance-based approach, requiring numerous model runs
for Monte Carlo integration. Experimental results indicate GPU-accelerated general-purpose computation provides an efficacious and feasible solution for the sensitivity analysis of large agent-based models. The heterogeneous parallel computing approach
The principal aim of this study is to measure the variability in wind speed on the windward slope of a dune, determine the magnitude of wind acceleration, describe the effects of this acceleration on the shape of wind profiles, and discuss
Accelerator-mass spectrometer ages for late-glacial events at Ballybetagh, Ireland
The AA. report six accelerator-mass spectrometer (AMS) 14C dates of hand-picked organic material from Ballybetagh. Several of the dates are based on terrestrial plant remains, thus eliminating the commonly encountered problem associated with Irish
Urban steeplands in the tropics : an environment of accelerated erosion
Slope failures and accelerated surface and channel erosion are particularly severe in cities near active plate margins, and in areas affected also by tropical cyclones. The AA. discuss 2 extreme cases : Singapore and Kingston (Jamaica). Singapore
Rockglacier acceleration in the Turtmann valley (Swiss Alps) : probable controls
Temporal variations in mountain permafrost creep are discussed within a regional study on rockglacier kinematics. On all investigated active rockglaciers in the Turtmann valley, a distinct acceleration of horizontal velocities has been recorded