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Influence Of Inner Surface Notch On Fatigue Crack Growth Characteristics Of Aluminum Alloy, Innovative Research Publications Irp India, Mahantesh. Matur, V. Krishnan, P. Dinesh Dec 2014

Influence Of Inner Surface Notch On Fatigue Crack Growth Characteristics Of Aluminum Alloy, Innovative Research Publications Irp India, Mahantesh. Matur, V. Krishnan, P. Dinesh

Innovative Research Publications IRP India

Effect of initial notch on the Fatigue crack growth of Aluminum 6061 specimen specified by ASTM is investigated. Growth rate obtained by experiment and numerical methods were compared. The values are in close agreement. The study shows the dependency of crack propagation on the stress intensity range of the Aluminum.


Differential Effects Of Canopy Trimming And Litter Deposition On Litterfall And Nutrient Dynamics In A Wet Subtropical Forest, Steven J. Hall, Whendee L. Silver, Grizelle González Nov 2014

Differential Effects Of Canopy Trimming And Litter Deposition On Litterfall And Nutrient Dynamics In A Wet Subtropical Forest, Steven J. Hall, Whendee L. Silver, Grizelle González

Steven J. Hall

Humid tropical forests have the highest rates of litterfall production globally, which fuels rapid nutrient recycling and high net ecosystem production. Severe storm events significantly alter patterns in litterfall mass and nutrient dynamics through a combination of canopy disturbance and litter deposition. In this study, we used a large-scale long-term manipulation experiment to explore the separate and combined effects of canopy trimming and litter deposition on litterfall rates and litter nutrient concentrations and content. The deposition of fine litter associated with the treatments was equivalent to more than two times the annual fine litterfall mass and nutrient content in control ...


Lead Exposure From Aluminum Cookware In Cameroon, Jeffrey D. Weidenhamer, Peter A. Lobunski, Gilbert Kuepouo, Rebecca W. Corbin, Perry Gottesfeld Oct 2014

Lead Exposure From Aluminum Cookware In Cameroon, Jeffrey D. Weidenhamer, Peter A. Lobunski, Gilbert Kuepouo, Rebecca W. Corbin, Perry Gottesfeld

Jeffrey D. Weidenhamer

Blood lead levels have decreased following the removal of lead from gasoline in most of the world. However, numerous recent studies provide evidence that elevated blood lead levels persist in many low and middle-income countries around the world at much higher prevalence than in the more developed countries. One potential source of lead exposure that has not been widely investigated is the leaching of lead from artisanal aluminum cookware, which is commonly used in the developing world. Twenty-nine samples of aluminum cookware and utensils manufactured by local artisans in Cameroon were collected and analyzed for their potential to release lead ...