Cartan's di®erential topology is used to construct a method for determining if a process applied to a physical system is thermodynamically irreversible.

introduction: one of the major problems in the development of nuclear medicine images is the presence of noise. the noise level in nuclear medicine images is usually reduced by the analysis of imaging data in a fourier transform environment. the main drawback of this environment belongs to low signal to noise ratio in high frequencies because removing noise frequencies may remove data and times...

Introduction I am never entirely sure what those who call themselves pragmatists or who declare an affi nity with pragmatism actually believe in. Pragmatists would probably respond that this is the wrong question, as what matters is not what they believe in but what they do with their beliefs—or, to be more precise, what follows from their beliefs. Aft er all, one of the founding insights of pr...

in this paper, a new and ecient approach based on operational matrices with respect to the gener-alized laguerre polynomials for numerical approximation of the linear ordinary dierential equations(odes) with variable coecients is introduced. explicit formulae which express the generalized la-guerre expansion coecients for the moments of the derivatives of any dierentiable function in terms...

Referential expressions are used to introduce and continue reference to entities with par ticular referential properties, but also with particular discourse properties. In this paper we investigate the referential and discourse properties of pemarked indefi nite direct objects in Romanian, which are an instance of Diff erential Object Marking (DOM). Pe -marking is generally obligatory for defi ...

Warehousing heterogeneous, dynamic biological data is a key technique for biological data integration as it greatly improves performance. However, it requires complex maintenance procedures to update the warehouse in light of the changes to the sources. Consequently, a key issue to address is how to detect changes to the underlying biological data sources. In this paper, we present an algorithm...

Th is study has two main approaches. First, it exploits the susceptibility of tomato cultivars as a prophylactic measure to detect auto resistance characters of the tested tomato varieties against Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae). Secondly, it evaluates the effi cacy of diff erent bio-rational insecticides against B. tabaci under greenhouse conditions. Th e results exhibited ...

T he above title automatically leads one to think of a technologically advanced and pricey new therapy. Patients would fl ock to our center in search of the latest and most innovative of therapies. In truth, gene therapy is available; it is available to everyone, every day, and it does not cost as much as one would think. Every time you eat, you are sending a message to your genes as to how the...

A 2nd-order, L-stable Rosenbrock method from the eld of sti ordinary di erential equations is studied for application to atmospheric dispersion problems describing photochemistry, advective and turbulent di usive transport. Partial di erential equation problems of this type occur in the eld of air pollution modelling. The focal point of the paper is to examine the Rosenbrock method for reliable...