The osmotic properties and the small angle neutron scattering (SANS) behaviour of fully neutralized sodium polyacrylate gels are investigated in the presence of calcium ions. Analysis of the SANS response displays three characteristic length scales, two of which are of thermodynamic origin, while the third, associated with the frozen-in structural inhomogeneities, is static. The SANS results ar...

There are different techniques for modeling and analysis of communication systems and networks. Because of their critical applications, today’s communication systems should be engineered to rigorous standards and methods. These methods depend on the use of mathematical techniques, and computer aided tools and methodologies. Petri nets (PNs) and their extensions are formalisms for modeling and a...

We have investigated the influence of multiple scattering on the magnetic small-angle neutron scattering (SANS) from a Nd-Fe-B nanocrystalline magnet. We performed sample-thickness- and neutron-wavelength-dependent SANS measurements, and observed the scattering vector dependence of the multiple magnetic scattering. It is revealed that significant multiple scattering exists in the magnetic scatt...

Mesoporous silica with worm-like pores of 9–10 nm in size were studied by small-angle neutron scattering (SANS) and high-resolution porosimetry, using nitrogen at 77 K and argon at 87 K. The pore sizes determined from SANS are in excellent agreement with those obtained from a recently developed non-local density functional theory (NLDFT) approach. Furthermore, the additional micropores in the m...

Stochastic Automata Networks (SANs) are widely used in modeling communication systems , manufacturing systems and computer systems. The solution of the steady state distribution cannot be obtained eeciently by direct methods such as LU decomposition due to the huge size of the generator matrix. EEcient numerical algorithm should make use of the tensor structure of SANs' generator matrix. The ge...

La sarcoïdose systémique est une maladie granulomateuse qui atteint avec prédilection l'appareil respiratoire. Une granulomatose digestive étagée isolée est rarement révélatrice de cette maladie. Le résultat de l'examen histologique de plusieurs biopsies étagées est déterminant. Patient âgé de 47 ans sans antécédents particuliers a consulté pour des épigastralgies atypiques évoluant depuis 6 mo...

OBJECTIVES To report our experience of subacute necrotizing sialadenitis (SANS), an unusual lesion of the minor salivary palatal glands, and to discuss its relationship with necrotizing sialometaplasia (NS). DESIGN A retrospective review of records for patients with SANS identified between 1996 and 2001. SETTING Academic center, referral center, and an ambulatory care center. PATIENTS Thr...

Stochastic activity networks (SANs) are a powerful and flexible extension of Petri nets. Modeling and analysis with Petri nets and their extensions need a software tool to help to construct and analyze the models. The original definition of SANs has been used as a modeling formalism in several tools. In this paper, we introduce a modeling tool called SharifSAN, which is based on a new definitio...

UNLABELLED The relevance of negative symptoms across the diagnostic spectrum of the psychoses remains uncertain. The purpose of this study was to report on prevalence of item and subscale level negative symptoms across the first episode psychosis (FEP) diagnostic spectrum in an epidemiological sample, and to ascertain whether items and subscales were more prevalent in a schizophrenia spectrum d...