this paper discusses the arching effect as the formation of a stable arch in granular materials. for this aim, a developed trapdoor apparatus is designed in order to investigate the arch dimensions in term of the internal friction angle, average size and base angle of materials. observations show that for all tested granular ensembles, width and height of the arch increase with an increase in t...

Piled foundations are commonly employed to reduce settlements of artificial earth embankments on soft soil strata and geosynthetic reinforcements installed at the embankment base increase pile spacing construction costs. Despite well-documented effectiveness this technique, mechanical processes, developing during in different elements constituting ‘geo-structure’, not fully understood design ap...

This paper is based on small-scale laboratory tests (1:10) of a rigid inclusion-improved soil under normal gravity. A low area improvement ratio (2.4%) monotonic and cyclic loading was used. 3D numerical calculations are performed to model these tests. The proposed modeling by the finite element method (FEM) using ABAQUS software. representative elementary volume suggested for reducing calculat...

A deep bed of granular material (more than six layers ofparticles) was subjected to sinusoidal, vertical vibrations. Several phenomena were observed depending on the amplitude of excitation. These included heaping, surjCace waves, and arching; the transitions from one state to another involved various dynamic instabilities and bifitrcations. The paper includes a description of these phenomena a...

This report describes a case in which a persistent third aortic arch connection partly palliated interruption of the aortic arch. The malformation occurred without other cardiovascular abnormality in a newborn infant in whom the principal diagnostic clinical finding was the absence of all peripheral pulses except for those of the right brachial and carotid arteries. Echocardiographic and angioc...

SIGMOD has had for the past few years an over-arching vision of enabling all information on the database field to be freely accessible to everyone. Of course, this goal runs smack into the economic realities of scientific publishing. So the SIGMOD Executive Committee over the period of 1997–2001 tempered its initial goals to the following strategy, emphasizing free CDROM accessibility first, fo...

Cross-sectional echocardiography (CSE) was performed on 19 patients with mitral stenosis (MS). Nine patients (group 1) had little or no mitral valve (MV) calcification; ten patients (group 2) had heavy MV calcification. An opening snap was present in each of the patients in group 1. Of the group 2 patients, five (group 2A) had an opening snap and five (group 2B) did not. CSE in the long axis re...