436 research outputs found
Sweet and Pretty Mamma.
Photo of big band; Illustration of ladyhttps://scholarsjunction.msstate.edu/cht-sheet-music/10388/thumbnail.jp
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The effects of self-esteem stress upon the perception of self and others.
Interference of stochastic resonances: Splitting of Kramers' rate
We consider the escape of particles located in the middle well of a symmetric
triple well potential driven sinusoidally by two forces such that the potential
wells roll as in stochastic resonance and the height of the potential barrier
oscillates symmetrically about a mean as in resonant activation. It has been
shown that depending on their phase difference the application of these two
synchronized signals may lead to a splitting of time averaged Kramers' escape
rate and a preferential product distribution in a parallel chemical reaction in
the steady state
Accounting Information Systems [1st Australasian edition]
At last – the Australasian edition of Romney and Steinbart's respected AIS text!
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Accounting Information Systems has been extensively revised and updated to incorporate local laws, standards and business practices. The text has a new and flexible structure developed especially for Australasian AIS courses, while also retaining the features that make the US edition easy to use.
Important concepts such as systems cycles, controls, auditing, fraud and cybercrime, ethics and the REA data model are brought to life by a wide variety of Australasian case studies and examples.
With a learning and teaching resource package second to none, this is the perfect resource for one-semester undergraduate and graduate courses in Accounting Information Systems
Stochastic Resonance in Underdamped, Bistable Systems
We carry out a detailed numerical investigation of stochastic resonance in
underdamped systems in the non-perturbative regime. We point out that an
important distinction between stochastic resonance in overdamped and
underdamped systems lies in the lack of dependence of the amplitude of the
noise-averaged trajectory on the noise strength, in the latter case. We provide
qualitative explanations for the observed behavior and show that signatures
such as the initial decay and long-time oscillatory behaviour of the temporal
correlation function and peaks in the noise and phase averaged power spectral
density, clearly indicate the manifestation of resonant behaviour in noisy,
underdamped bistable systems in the weak to moderate noise regime.Comment: Revtex; (10+8)pp including 8 figure
Inhomogeneous quantum diffusion and decay of a meta-stable state
We consider the quantum stochastic dynamics of a system whose interaction
with the reservoir is considered to be linear in bath co-ordinates but
nonlinear in system co-ordinates. The role of the space-dependent friction and
diffusion has been examined in the decay rate of a particle from a meta-stable
well. We show how the decay rate can be hindered by inhomogeneous dissipation
due nonlinear system-bath coupling strength.Comment: To be published in Phys. Lett.
Stochastic resonance in soft matter systems: combined effects of static and dynamic disorder
We study the impact of static and dynamic disorder on the phenomenon of
stochastic resonance (SR) in a representative soft matter system. Due to their
extreme susceptibility to weak perturbations soft matter systems appear to be
excellent candidates for the observation of SR. Indeed, we derive generic SR
equations from a polymer stabilized ferroelectric liquid crystal (LC) cell,
which is a typical soft matter representative constituting one of the basic
components in several electro-optic applications. We generalize these equations
further in order to study an even broader class of qualitatively different
systems, especially disclosing the influence of different types of static
disorder and interaction ranges amongst LC molecules on the SR response. We
determine the required conditions for the observation of SR in the examined
system, and moreover, reveal that a random field type static disorder yields
qualitatively different responses with respect to random dilution, random bond
and spin glass universality classes. In particular, while the latter three
decrease the level of dynamic disorder (Gaussian noise) warranting the optimal
response, the former evokes exactly the opposite effect, hence increasing the
optimal noise level that is needed to resonantly fine-tune the system's
response in accordance with the weak deterministic electric field. These
observations are shown to be independent of the system size and range of
interactions, thus implying their general validity and potentially wide
applicability also within other similar settings. We argue that soft matter
systems might be particularly adequate as a base for different SR-based
sensitive detectors and thus potent candidates for additional theoretical as
well as experimental research in the presently outlined direction.Comment: 11 two-column pages, 6 figures; accepted for publication in Soft
Matte
Inositol polyphosphate derivative inhibits Na + transport and improves fluid dynamics in cystic fibrosis airway epithelia
Amiloride-sensitive, epithelial Na+ channel (ENaC)-mediated, active absorption of Na+ is elevated in the airway epithelium of cystic fibrosis (CF) patients, resulting in excess fluid removal from the airway lumen. This excess fluid/volume absorption corresponds to CF transmembrane regulator-linked defects in ENaC regulation, resulting in the reduced mucociliary clearance found in CF airways. Herein we show that INO-4995, a synthetic analog of the intracellular signaling molecule, D-myo-inositol 3,4,5,6-tetrakisphosphate, inhibits Na+ and fluid absorption across CF airway epithelia, thus alleviating this critical pathology. This conclusion was based on electrophysiological studies, fluid absorption, and 22Na+ flux measurements in CF airway epithelia, contrasted with normal epithelia, and on electrophysiological studies in Madin-Darby canine kidney cells and 3T3 cells overexpressing ENaC. The effects of INO-4995 were long-lasting, dose-dependent, and more pronounced in epithelia from CF patients vs. controls. These findings support preclinical development of INO-4995 for CF treatment and demonstrate for the first time the therapeutic potential of inositol polyphosphate derivatives
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