A three-dimensional primitive equation numerical model was applied to Lake Michigan for the periods 1982–1983 and 1994–1995 to study seasonal and interannual variability of lake-wide circulation and thermal structure in the lake. The model was able to reproduce all of the basic features of the thermal structure in Lake Michigan: spring thermal bar, full stratification, deepening of the thermocl...

[1] A dense ocean bottom seismometer array recorded more than 7,300 microearthquakes between October 2003 and April 2004 on the fast spreading East Pacific Rise at 9°50′ N. A previous initial analysis of these data revealed the general structure of an along‐axis oriented hydrothermal circulation cell, with an inferred down‐flow zone near a 4th‐order axial discontinuity, a horizontal band of sei...

The present article deals with transient thermal stress calculation on a safety horizontal shell and tube condenser. This condenser is used in power plant for cooling of hot steam diverted from the turbine case its emergency shutdown. standard was provided according to EN 13445 steady regime. As consistent this calculation, an expansion joint must be shell. main aim describe detailed temperatur...

PURPOSE The purpose of this study was to evaluate various core designs on stress distribution within zirconia crowns. MATERIALS AND METHODS Three-dimensional finite element models, representing mandibular molars, comprising a prepared tooth, cement layer, zirconia core, and veneer porcelain were designed by computer software. The shoulder (1 mm in width) variations in core were incremental in...

Abstract The Ellis model describes the apparent viscosity of a shear–thinning fluid with no singularity in limit vanishingly small shear stress. In particular, this matches Newtonian behaviour when stresses are very small. emergence Rayleigh–Bénard instability is studied horizontal pressure gradient, yielding basic throughflow, prescribed porous layer. threshold conditions for linear system obt...

Sandstone intrusions are found in all sedimentary environments but have been reported most commonly from deep-water settings. They also appear to be more frequently developed in tectonically active settings where applied tectonic stresses facilitate development of high fluid pressures within the sediments. A variety of mechanisms have been cited as triggers for clastic intrusions. These include...

BACKGROUND Understanding of viscoelastic behaviour of a periodontal membrane under physiological conditions is important for many orthodontic problems. A new analytic model of a nearly incompressible viscoelastic periodontal ligament is suggested, employing symmetrical paraboloids to describe its internal and external surfaces. METHODS In the model, a tooth root is assumed to be a rigid body,...

-Soil compaction in cropping systems, caused by the external pressure of machinery, creates impermeable layers that restrict water and nutrient cycles reducing agricultural production. To evaluate matric suction effects on distribution with depth stresses a soil, use Jet Fill tensiometers were installed at two different depths (i.e. 0.15 m, 0.30 m) soil profile constituted silty sand gravel (SM...

Introduction: The Xujiahe Formation in the Yingshan-Longgang area of Sichuan Basin has abundant tight oil and gas resources. However, complex geological conditions insufficient understanding magnitude direction in-situ stresses severely limit exploration development resources region. This made it difficult to carry out hydraulic fracturing horizontal well deployment Methods: Based on experiment...