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Seismic Vulnerability of Residential Structures in Nicaragua
(2009)
In recent times, many parts of the world have seen a trend of increased construction with reinforced concrete and masonry block systems. These systems can provide excellent seismic resistance when they are designed by an ...
Hysteresis and dynamic effects in the relationship between capillary pressure, saturation, and air-water interfacial area in porous media.
(2006)
Air-water interfacial areas (A) were measured for multiple drainages (primary, secondary, and scanning) using a newly developed method, along hysteretic Pc-S curves representing natural drying/wetting processes. The ...
Regression and neural network modeling of resilient modulus based on routine soil properties and stress states.
(2006)
The laboratory results from the fourteen sites from fourteen counties were used to develop the relationships or models.
Neural network and analytical modeling of slope stability.
(2002)
A semi-analytical method is developed for analysis of slope stability involving cohesive and non-cohesive soils. For sandy slopes, a planar slip surface is employed. For clayey slopes, circular slip surfaces are employed ...
FORMATION, CHARACTERIZATION AND APPLICATION OF TRIGLYCERIDE MICROEMULSIONS USING EXTENDED SURFACTANTS
(2009)
Triglycerides are among the most challenging oils to microemulsify due to their unique structure of a bulky polar ester head and three long hydrocarbon chains. Among the published work on triglyceride microemulsions, the ...
Redox functional groups of humic substances.
(2004)
A new analytical technique based on palladium (Pd) and H2 catalytic system showed significant potential as a useful method for reliably assessing redox sites in humic substances. The technique identifies redox sites as a ...
A COUPLED HYDRAULIC-MECHANICAL ELASTOPLASTIC CONSTITUTIVE MODEL FOR UNSATURATED SANDS AND SILTS
(2009)
Unsaturated soils are three-phase porous media consisting of a solid skeleton, pore water, and pore air. It is well known that the behavior of unsaturated soils is influenced heavily by the matric suction (pore air ...
Studies of the content and process of environmental education.
(2002)
In order to examine the extent to which four-year institutions in the U.S. provide for the environmental education of students in nonenvironmental majors, and to identify various approaches to increasing environmental ...
Modeling of Integral Abutment Bridges Considering Soil-Structure Interaction Effects
(2009)
Soil-structure interaction problems are both highly interesting and highly complex. To model soil-structure interaction problems accurately, the constitutive parts (i.e. foundations, soils, and superstructures) must be ...
A framework-based finite element approach for solving large deformation problems in multi-phase porous media.
(2005)
The performance of the uniform gradient element formulation is studied by simulating settlement of a footing and dynamic behavior of a saturated clay embankment and a level ground. Significant hourglassing is seen for the ...