Geometric characteristics of 2-manifolds embedded in R space have been analyzed from the point of view of differential geometry and topology. In the past, results relevant to these areas have been found for C curves and surfaces. However, current scientific, industrial, entertainment and medical applications, and availability of more powerful point sampling systems, press for characterization o...

Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid cyclic loading. Liquefaction and related phenomena have been responsible for huge amounts of damage in historical earthquakes around the world. Modeling of soil behavior is the main step in soil liquefaction prediction process. Nowadays, several constitutive models for sand...

Sewage sludge is an unavoidable secondary pollution produced in the process of sewage treatment. At present traditional methods of treating sludge (e.g. landfill, incineration or land application) have some disadvantages and shortages. Direct thermochemical liquefaction of sludge is a new treatment method, which has the advantage of both treatment and energy recovery. Research progress and appl...

Liquefaction is one of the major catastrophic geohazards which usually occurs in saturated or partially sandy silty soils during a seismic event. Evaluating potential liquefaction risks seismically prone area can significantly reduce loss lives and damage to civil infrastructures. This research mainly focused on earthquake-induced risk assessment based Potential Index (LPI) values at different ...

Soil liquefaction resistance evaluation is an important site investigation for seismically active areas. To minimize the loss of life and property, hazard analysis a prerequisite seismic risk management. Liquefaction potential index (LPI) widely used to determine severity quantitatively spatially. LPI estimated from factor safety that ratio cyclic (CRR) stress calculated applying simplified pro...

The objective of the study presented herein is to access the influence of rupture directivity on the inducement of liquefaction in loose, saturated sand. Rupture directivity is a near fault phenomenon that results in a pronounced double-sided velocity pulse in the strike normal component(s) of motion. Using the Palmgren-Miner fatigue theory, implemented for low cycle fatigue conditions, the num...