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Articles 1 - 10 of 10
Full-Text Articles in Physical Sciences and Mathematics
Badia Rangeland Rehabilitation: Community Participation, Raed Al-Tabini, H. Soub
Badia Rangeland Rehabilitation: Community Participation, Raed Al-Tabini, H. Soub
Raed Al-Tabini
No abstract provided.
Waiting To Inhale: The Demographics Of Toxic Air Release Facilities In 21st-Century California, Manuel Pastor, James Sadd, Rachel Morello-Frosch
Waiting To Inhale: The Demographics Of Toxic Air Release Facilities In 21st-Century California, Manuel Pastor, James Sadd, Rachel Morello-Frosch
James Sadd
We examine the spatial distribution of toxic air releases and residential demographics in California using 2000 Census data and coeval information from the Federal Toxic Release Inventory for evidence of disproportionate exposure. Methods. We use spatial analysis using GIS, and multivariate regression analysis, including ordered and multinomial logit regressions, in our study. Results. Analytical results suggest a pattern of disproportionate exposure based on race, with the disparity most severe for Latinos, which holds in a series of multivariate regressions, including attempts to test for varying levels of pollution risk and to control for spatial dependence. Conclusions. The study corroborates earlier …
Local Community Participation In Livelihoods Improvement And Sustainability “Anaqeed Al-Khair Project Case Study, Raed Al-Tabini, I.A. Hawamdeh
Local Community Participation In Livelihoods Improvement And Sustainability “Anaqeed Al-Khair Project Case Study, Raed Al-Tabini, I.A. Hawamdeh
Raed Al-Tabini
No abstract provided.
An Evaluation Of The Potential Of Atriplex Nummualria For Sheep Production In Arid Jordanian Rangelands, Raed Al-Tabini, A. Younger
An Evaluation Of The Potential Of Atriplex Nummualria For Sheep Production In Arid Jordanian Rangelands, Raed Al-Tabini, A. Younger
Raed Al-Tabini
No abstract provided.
Reading, Writing, And Toxics: Children's Health, Academic Performance, And Environmental Justice In Los Angeles, Manuel Pastor, James Sadd, Rachel Morello-Frosch
Reading, Writing, And Toxics: Children's Health, Academic Performance, And Environmental Justice In Los Angeles, Manuel Pastor, James Sadd, Rachel Morello-Frosch
James Sadd
A significant body of previous research on environmental justice has demonstrated a disproportionate burden of environmental hazards on low-income and minority residents. In this paper we evaluate spatially indexed data on estimated respiratory and cancer risks associated with exposures to ambient air toxics to show that children of color in the Los Angeles Unified School District suffer potentially disparate health impacts, and that disparities in environmental risks may be associated with diminished school performance -- even after controlling for socioeconomic and demographic covariates that generally explain much of the variation in student scores. Remediating environmental health risks in distressed neighborhoods …
Long-Range Downstream Effects Of Urban Runoff And Acid Mine Drainage In The Debed River, Armenia: Insights From Lead Isotope Modeling, Robert Kurkjian, Charles Dunlap, A. Flegal
Long-Range Downstream Effects Of Urban Runoff And Acid Mine Drainage In The Debed River, Armenia: Insights From Lead Isotope Modeling, Robert Kurkjian, Charles Dunlap, A. Flegal
Charles Dunlap
Lead concentrations and isotopic compositions measured along 80 km of the Debed River in the Republic of Armenia provide new insights into the geochemical and physical controls on riparian Pb transport by allowing comparison of the long-range, downstream impacts of acid mine drainage with runoff from an industrialized city. The modern background Pb concentration in Armenian surface waters is estimated to be ~0.01 lg/L, based on analyses of remote alpine rivers in Armenia. The lead concentration in the Debed River is 8 µg/L (800 times background) after passing through Vanadzor, the second largest industrial city in Armenia; it then decreases …
An Analog And Mathematical Modeling Resource Catalog For Undergraduate Structural Geology Courses, Phillip Resor, John Stimac, Michelle Cooke, Juliet Crider, Dazhi Jiang, Basil Tikoff, Jamie Toro
An Analog And Mathematical Modeling Resource Catalog For Undergraduate Structural Geology Courses, Phillip Resor, John Stimac, Michelle Cooke, Juliet Crider, Dazhi Jiang, Basil Tikoff, Jamie Toro
Phillip G Resor
The Modeling Structural Processes Working Group of the recent NAGT Workshop: "Teaching Structural Geology in the 21st Century" (TSG21) presents a catalog of models used in the teaching of structural geology to undergraduate students. Structural geology models are simplified constructs of complex earth system processes that have long been known to engage students and enhance their intuition of the deformation of earth materials. We recognize four classes of models: conceptual models, data representation models (including maps, stereonets, three-dimensional renderings, and statistical descriptions), analog models (including experiments with rock and non-rock materials), and mathematical models (including analytical expressions and deterministic or …
Numerical Investigation Of Saturated Source Area Behavior At The Small Catchment Scale, Fred L. Ogden
Numerical Investigation Of Saturated Source Area Behavior At The Small Catchment Scale, Fred L. Ogden
Fred L. Ogden
The objective of this research is to explore the relationship between small catchment properties and the temporal growth and decay of saturated source areas (SSA). A simple physics-based hydrologic model, which we call the Sandbox model, is developed for this purpose. A thorough sensitivity analysis is undertaken to evaluate model response to variations in model parameters. Sandbox model output is compared to that from the semi-distributed conceptual model, TOPMODEL, a model with a wide spread acceptance. Plotting the temporal evolution of the extent of saturated source area versus catchment average soil water content dur- ing a number of wetting and …
Lead In Residential Soil And Dust In A Mining And Smelting District In Northern Armenia: A Pilot Study, Varduhi Petrosyan, Anna Orlova, Charles E. Dunlap, Emil Babayan, Mark Farfel, Margrit Von Braun
Lead In Residential Soil And Dust In A Mining And Smelting District In Northern Armenia: A Pilot Study, Varduhi Petrosyan, Anna Orlova, Charles E. Dunlap, Emil Babayan, Mark Farfel, Margrit Von Braun
Charles Dunlap
This pilot study of sources of lead exposure in residential settings was conducted in a mining and smelting district in northern Armenia. Samples of exterior soil and dust and interior house dust were collected in and around apartment buildings in Alaverdi where the country’s largest polymetallic smelter is located, and in nearby mining towns of Aghtala and Shamlugh. The NITON XL- 723 Multi-Element XRF analyzer was used for lead testing. Lead levels in samples from Alaverdi were higher than those in Shamlugh and Aghtala. In all three towns, the highest lead levels were found in loose exterior dust samples, and …
Sadc Challenges Country Water Partnerships To Make Impact, Stanley Mubako
Sadc Challenges Country Water Partnerships To Make Impact, Stanley Mubako
Stanley Mubako
No abstract provided.