Results 91 to 100 of about 154,412 (301)
On the Distribution of City Sizes [PDF]
The city size distribution of many countries is remarkably well approximated by a Pareto distribution. We study what constraints this regularity imposes on standard urban models. We find that under general conditions urban models must have (i) a balanced
Juan Carlos Cordoba
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Lack of uniqueness for weak solutions of the incompressible porous media equation
, 2009 In this work we consider weak solutions of the incompressible 2-D porous media equation. By using the approach of De Lellis-Sz\'ekelyhidi we prove non-uniqueness for solutions in $L^\infty$ in space and time.Comment: 23 pages, 2 ...
A. Shnirelman +17 more
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Head &Neck, EarlyView.ABSTRACT Background Head and neck cancer (HNC) is a devastating diagnosis, with advanced‐stage disease leading to poorer outcomes. This qualitative study aimed to identify health system factors associated with stage of HNC diagnosis. Methods Qualitative semistructured interviews with HNC patients and clinicians were undertaken in two purposively ...
Grant Creaney +196 more
wiley +1 more source
Mediating and Moderating Factors Affecting Pro-environmental Decision-Making: A Spanish Study
Australian Journal of Environmental EducationBecause it is relevant to analyse the variables that may influence pro-environmental decision-making, the aim of this study was to analyse (a) the mediating role of perceived responsibility towards climate change (CC) in the relationship between ...
Esther Cuadrado +2 more
doaj +1 more source
Journal of Applied Toxicology, EarlyView.ABSTRACT The present study aimed to quantify pesticide residues in environmental matrices and plasma and to evaluate their potential effects on oxidative stress and DNA damage in rural populations of Santa Fe province. Soil and rainwater samples were collected, and biological samples and semistructured surveys were obtained from volunteers in three ...
María Priscila Dechiara +4 more
wiley +1 more source
Acta PsychologicaThis work aimed to determine the effectiveness of a classroom-based transdiagnostic preventive intervention in the reduction of emotional symptoms and the improvement of emotional regulation strategies in university environments.
Eliana M. Moreno +5 more
doaj +1 more source
On the Collapse of Tubes Carried by 3D Incompressible Flows
, 2001 We povide a test for numerical simulations for the collapse of regular tubes carried by a 3D incompressible flow. In particular, we obtain necessary conditions for 3D Euler to have a vortex tube collapse in finite time.Comment: 10 pages; the only change ...
Cordoba, Diego, Fefferman, Charles
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JCPP Advances, EarlyView.Abstract Background Genetic epidemiological analyses of child and adolescent mental health often use data from prospective longitudinal cohorts. Missingness due to selective attrition is therefore an important potential source of bias in such analyses.
Meseret M. Bazezew +4 more
wiley +1 more source
Understanding nitrate assimilation and its regulation in microalgae
Frontiers in Plant Science, 2015 Nitrate assimilation is a key process for nitrogen (N) acquisition in green microalgae. Among Chlorophyte algae, Chlamydomonas reinhardtii has resulted to be a good model system to unravel important facts of this process, and has provided important ...
Emanuel eSanz-Luque +4 more
doaj +1 more source
Spatial and temporal variability of CO2 emisions in soils under conventional tillage and no-till farming [PDF]
, 2012 Agricultural soils can act as a carbon sink depending on the soil management practices employed. As a result of this functional duality, soil management systems are present in international documents relating to climate change mitigation.
Basch, G. +4 more
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