Gas chromatography-mass spectrometry (GC-MS) is a widely used analytical technique in metabolomics. GC provides the highest resolution of any standard chromatographic separation method, and with modern instrumentation, retention times are very consistent between analyses. Electron impact ionization and fragmentation is generally reproducible between instruments and extensive libraries of spectr...

In this paper, the physical optics method is used to study the problem of electromagnetic scattering from Haack series nose cone. First, a meshing scheme is introduced which approximates the curvature of the surface by piecewise linear functions in both axial and rotational directions. This results in planar quadrilateral patches and enables efficient determination of the illuminated region and...

In this paper we will study the non-linear oscillation of a conservative system having inertia and static non-linearities. By combining the linearization of the governing equation with the method of harmonic balance, we investigate analytical approximate solutions for the non-linear oscillations of the system. Unlike the classical harmonic balance method, linearization is performed prior to pro...

We describe a non-parametric bootstrap method to estimate the statistical properties of Single Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET) images, whatever the type of noise in the projections and the reconstruction algorithm. Using analytical simulations and real PET data, this method is shown to accurately predict the statistical distribution, hence the ...

Heterogeneous network computing enables the development of a single complex application using a distributed network of possibly dissimilar machines. While heterogeneous networks promise cost-eeective compute cycles, almost no software is available to aid in the design and implementation of their applications. In this paper, we couple the Zoom representation, designed to facilitate development o...