The Pulsed Plasma Thruster (PPT) is a low cost reliable electric propulsive device that has typical performance within the ranges; specific impulse 300 – 1700 s, Impulse bit 0.06 – 2.6 mN.s and thrust efficiency less than 20%. Past studies have focused on specific aspects to increase performance and understanding, i.e. late time ablation or current sheet canting. Although enlightening, they hav...

Action potentials of embryonic nerve and muscle cells often have a different ionic dependence and longer duration than those of mature cells. The action potential of spinal cord neurons from Xenopus laevis exhibits a prominent calcium component at early stages of development that diminishes with age as the impulse becomes principally sodium dependent. Whole-cell voltage-clamp analysis has been ...

The potential for improving the stability of trinitramide (N(NO2)3) by chemical substitution NO2 group has been investigated using Kohn-Sham density functional theory [M06-2X/6-31+G(d,p)] and ab initio quantum chemistry [CBS-QB3]. Monosubstituted analogs are generally found to have a decreased N-NO2 bond dissociation enthalpy (BDE) because increased stabilization N(NO2)X radical intermediate re...

Abstract Adding aluminum particles to solid propellants is used improve the energy density of propellant and specific impulse engine. However, will agglomerate form large-sized condensed combustion products, which can cause nozzle erosion two-phase flow loss. Therefore, it necessary study agglomeration characteristics propellants. In this paper, process Al/NEPE was recorded by a high speed came...

OBJECTIVE To assess the association between body mass index (BMI) and the prevalence of psychiatric disorders among Mexico City adolescents. MATERIAL AND METHODS Household survey of 3005 adolescents aged 12 to 17 residing in Mexico City in 2005 (response rate = 71%). Face to face interviews were carried out in the homes of participants with informed consent from a parent and/or legal guardian...

In this paper the quantum hydrodynamic approach for the Klein–Gordon equation (KGE) owning a perturbative self-interaction term is developed. The generalized model to non-Euclidean space–time allows for the determination of the quantum energy impulse tensor density of mesons, for the gravitational equation of quantum mechanical systems.

We discuss in this publication the power spectral density (PSD) of some common time hopping impulse radio signals. Both analytical expressions and simulation results for the PSD are provided. The impact of the PSD on the transmitted power is analyzed in respect to the Federal Committee on Communications regulations on UWB emissions.

Impulse-control disorders such as pathological gambling, sexual addiction, and compulsive shopping cause enormous suffering in people’s lives. The feeling-state theory of impulse-control disorders postulates that these disorders are created when intense positive feelings become linked with specific behaviors. The effect of this linkage is that, to generate the same feeling, the person compulsiv...

Nonmyelinated nerve fibers undergo rapid volume expansion while carrying an impulse. This volume expansion is incurred as a consequence of a lateral expansion of the excited portion of the fibers, where the superficial layer is transformed into a low-density structure.