Using a new, second-order accurate numerical method we present dynamical simulations of oblique MHD cosmic ray (CR) modified plane shock evolution using the two-fluid model for diffusive particle acceleration. The numerical shocks evolve to published analytical steady state properties. In order to probe the dynamical role of magnetic fields we have explored for these time asymptotic states the ...

Background. Certain biphasic waveforms defibrillate at lower energies than monophasic waveforms, although the mechanism is unknown. Methods and Results. The relative ability of monophasic and biphasic shocks to stimulate partially refractory myocardium was compared because defibrillation is thought to involve stimulating relatively refractory myocardial tissue. Shocks of 25-125 V were given dur...

This paper studies the effects of shocks to the degree of market completeness. We present a dynamic stochastic economy where agents can trade in complete markets in normal times, but where financial markets can stochastically become incomplete. When this happens, agents cannot trade in state contingent assets and cannot re-hedge their risks. Our model formalizes a new type of purely financial s...

BACKGROUND The primary method for monitoring implantable cardioverter-defibrillator lead integrity is periodic measurement of impedance. Sprint Fidelis leads are prone to pace-sense lead fractures, which commonly present as inappropriate shocks caused by oversensing. METHODS AND RESULTS We developed and tested an algorithm to enhance early identification of lead fractures and to reduce inappr...

This paper proposes the use of data on expectations to identify the role of news shocks in business cycles. This approach exploits the fact that news shocks cause agents to adjust their expectations about the future even when current fundamentals are not affected. Using data on expectations, we estimate a dynamic, stochastic, general equilibrium model that incorporates news shocks for the U.S. ...

The Provision of Wage Insurance by the Firm: Evidence from a Longitudinal Matched Employer-Employee Dataset We evaluate the impact of product market uncertainty on workers wages, addressing the questions: To what extent do firms provide insurance to their workforce, insulating their wages from shocks in product markets? How does the amount of insurance provided vary with firm and worker attribu...

In many cases, modeling a mechanical process may require a good understanding of signals issued from the system, as vibration accelerations. This is particularly the case when shocks are responsible of the vibrations. In the case of critical systems, each shock induces natural modes excitation with damped sines amplitudes. Identification of the shocks (occuring instants and induced vibrations) ...

I investigate whether existing equilibrium business cycle models driven by demand shocks (in particular, government spending shocks) can rationalize the observed causal relationship when the following information structure is embedded: (i) Employment and output cannot respond to demand shocks immediately; they can do so only with a lag behind consumption. And (ii) investment cannot respond to d...

This paper examines how the interaction between inflation expectations and nominal and real macroeconomic variables has evolved for the United Kingdom over the post-WWII period until 2007. We model time-variation through a Markov switching structural vector autoregressive framework with variants of the sign restriction identification scheme to back out the time-varying effect of different struc...

I consider the appearance of shocks in hyperbolic formalisms of General Relativity. I study the particular case of the Bona-Massó formalism with zero shift vector and show how shocks associated with two families of characteristic fields can develop. These shocks do not represent discontinuities in the geometry of spacetime, but rather regions where the coordinate system becomes pathological. Fo...