Nash and Sobolev inequalities are known to be equivalent to ultracontractive properties of heat-like Markov semigroups, hence to uniform on-diagonal bounds on their kernel densities. In non ultracontractive settings, such bounds can not hold, and (necessarily weaker, non uniform) bounds on the semigroups can be derived by means of weighted Nash (or super-Poincaré) inequalities. The purpose of t...

Fescues (Festuca sp.) are major cool-season forage and turf grass species around the world. Heat stress is one of the limiting factors in the production of fescues as forage in the southern Great Plains of the US. Heat responsive gene transcripts were cloned by using suppression subtractive hybridization between a heat-tolerant and a heat-sensitive fescue genotype subjected to a slowly increase...

Transient heat conduction in semi-infinite medium with a time dependent flux as boundary condition has been solved by semi-derivative integral-balance method. Two versions fluxes have considered: power-law and exponential.

Terminal heat stress leads to significant yield reduction in wheat. Thus, the determination of tolerant genotypes is major importance wheat breeding program. The present study was conducted at Shandaweel agricultural research station, Sohag, Egypt during 2019/2020 and 2020/2021 growing seasons, evaluate twelve bread under normal sowing (20 November) late (30 December) dates, experiment set up a...

Under active icing conditions, the heat transfer performance of CPHE has a significant impact on system’s efficiency and energy consumption. Using enthalpy-porosity method for describing solidification process liquids, simulation analysis effects different parameter changes were conducted to clarify in intermediary side inlet water temperature, intermediate flow rate, cold rate CPHE. According ...

we develop and apply the product integration method to a large class of linear weakly singular volterra systems. we show that under certain sufficient conditions this method converges. numerical implementation of the method is illustrated by a benchmark problem originated from heat conduction.

introduction: accurate diagnosis of dental pulp conditions plays a key role in selection of an appropriate treatment including conservative vital pulp therapy (treatable pulp) or root canal treatment (untreatable pulp). the purpose of this study was to assess the accuracy of sensibility tests and the correlation of pulp response to sensibility tests with histologic pulp condition . material and...

We study the heat content asymptotics on a Riemannian manifold with smoooth boundary defined by Dirichlet, Neumann, transmittal and transmission boundary conditions. Subject Classification: 58J50

A well-known dairy scientist once wrote that "compared with an effective environmental management system, manipulation of the cow's diet specifically for heat stress will have a relatively small effect on productivity" (Beede and Shearer, 1992). Indeed many dietary adjustments made during heat stress feeding are to compensate for reduced feed intake or to maintain physiologic homeostasis in the...