This case tells the true story of a university employee who suffered from color blindness and who, although he had been an exceptional employee, was terminated when he could not read the color screens displayed by the newly installed PeopleSoft system. Moral outrage on the campus initiated a process that ultimately resulted in Hal Richards being offered another position in which his talents cou...

To use soil hydrology processe (SHP) models, which have increasingly extended during the last years, comprehensive knowledge about these models and their modeling approaches seems to be necessary. The modeling approaches can be categorized as either classical or non-classical. Classical approaches mainly model the SHP through solving the general unsaturated flow (Richards) equation, numerically...

To use soil hydrology processes (SHP) models, which have increasingly extended during the last years, comprehensive knowledge about these models and their modeling approaches seems to be necessary. The modeling approaches can be categorized as either classical or non-classical. Classical approaches mainly model the SHP through solving the general unsaturated flow (Richards) equation, numericall...

and the Nature of Long-Distance Extraction Norvin Richards, MIT, August 2005 [email protected]

The parameters in Richards' equation are usually calculated from experimentally measured values of the soil-water characteristic curve and saturated hydraulic conductivity. The complex pore structures that often occur in porous media complicate such parametrization due to hysteresis between wetting and drying and the effects of tortuosity. Rather than estimate the parameters in Richards' equati...

Spines reach out ored dendritic spines look for new challenges, say David Richards, R. Anne McKinney (in work done at the University of Zurich, Switzerland), and colleagues. Spines are small dendritic protrusions on which excitatory synapses connect to axons. Recent evidence suggested that spines are mobile even in adults. Richards et al. now suggest that this mobility allows for post-developme...

A FORTRAN code for liquid water flow in unsaturated soil under the isothermal condition was developed to simulate water infiltration into Yolo light clay. The governing equation, that is, Richards' equation, was approximated by the finite-difference method. A normalized sensitivity coefficient was used in the sensitivity analysis of Richards' equation. Normalized sensitivity coefficient was cal...

[1] Soil water dynamics and drainage are key abiotic factors controlling losses of atmospherically deposited N in Southern California. In this paper soil N leaching and trace gaseous emissions simulated by the DAYCENT biogeochemical model using its original semi‐dynamic water flow module were compared to that coupled with a finite element transient water flow module (HYDRUS), for two mixed coni...

The Richards model and its generalized version are deterministic models that often implemented to fit forecast the cumulative number of infective cases in an epidemic outbreak. In this paper we employ a predict COVID-19 Spain Italy, based on available epidemiological data. To quantify uncertainty parameter estimation, use parametric bootstrapping approach construct 95% confidence interval estim...