in this study, nonlocal nonlinear instability and the vibration of a double carbon nanotube (cnt) system have been investigated. the visco-pasternak model is used to simulate the elastic medium between nanotubes, on which the effect of the spring, shear and damping of the elastic medium is considered. both of the cnts convey a viscose fluid and a uniform longitudinal magnetic field is applied t...

Mohammad­Reza Alam Journal of Fluid Mechanics / Volume 691 / January 2012, pp 267 ­ 278 DOI: 10.1017/jfm.2011.473, Published online: 08 December 2011 Link to this article: http://journals.cambridge.org/abstract_S0022112011004733 How to cite this article: Mohammad­Reza Alam (2012). A new triad resonance between co­propagating surface and interfacial waves. Journal of Fluid Mechanics, 691, pp 267...

We give a mathematically rigorous analysis which confirms the surprising results in a recent paper [2] of Benilov, O’Brien and Sazonov about the spectrum of a highly singular non-self-adjoint operator that arises in a problem in fluid mechanics. MSC-class: 34Lxx, 76Rxx, 65F15, 65Q05 keywords: spectrum, non-self-adjoint, fluid mechanics, pseudospectra, eigenvalue, basis.

Abstract Unclean air discharge refers to the phenomenon of a large number polluting gases, droplets or solid particles floating in air, which will cause insulation breakdown and safety accidents for power transmission equipment that have been left outdoors long time. In order investigate effects particle concentration, size dielectric constant on DC characteristics unclean gap, self‐made chambe...

Dental thermal pain is a significant health problem in daily life and dentistry. There is a long-standing question regarding the phenomenon that cold stimulation evokes sharper and more shooting pain sensations than hot stimulation. This phenomenon, however, outlives the well-known hydrodynamic theory used to explain dental thermal pain mechanism. Here, we present a mathematical model based on ...

BACKGROUND Several studies have demonstrated increased inhospital mortality following weekend admission. We hypothesized that the presence of resident trainees reduces the weekend mortality trends. METHODS We identified all patients with a non-elective hospital admission from 1/1/2003 through 12/31/2008. We abstracted vital status on discharge and calculated the Charlson comorbidity score for...

This paper examines the effects of variation in unexpected demand on patient outcomes in acute care German hospitals. Naturally, an unexpected surge in demand may negatively affect the quality of care and thus patient outcomes, such as in-hospital mortality. We estimate models explaining patient outcomes depending on demand, unobservable patient selection and seasonal factors, as well as patien...

The Relational Re-enactment Systems Approach to Treatment model is a coherent and comprehensive approach to residential treatment that increases family involvement through system-wide clinical consultation. The therapeutic alliance with youth and their families is emphasized as the key to creating client-centered goals for discharge to a less restrictive environment. The current study examined ...

The interaction of streamers in nitrogen-oxygen mixtures such as air is studied. First, an efficient method for fully three-dimensional streamer simulations in multiprocessor machines is introduced. With its help, we find two competing mechanisms how two adjacent streamers can interact: through electrostatic repulsion and through attraction due to nonlocal photoionization. The nonintuitive effe...

In order to evaluate the feasibility of installing decentralised installations for wastewater reuse in cities, information about flows at specific spots of a sewer is needed. However, measuring intermittent flows in partially filled conduits is a technical task which is sometimes difficult to accomplish. This paper describes a method to model intermittent discharges in small sewers by linking a...