We study the pair production of open strings in constant external electric fields, using a general framework which encodes both relativistic string theory and generic linearly extended systems as well. In the relativistically invariant case we recover previous results, both for pair production and for the effective Born-Infeld action. We then derive a non-relativistic limit where the propagatio...

In this paper we consider the thermoelastic plate equation with localized thermal dissipation of memory type, proposed by Gurtin and Pipkin [3]. We will show that the solution of the corresponding model decays exponentially as time goes to infinity, provided the relaxation function decays exponentially. The mean difference with others thermoelastic system is that the whole system is of hyperbol...

Thefluctuation dissipation theorem is at the heart of equilibrium statisticalmechanics. For a system away from thermal equilibrium, generalized nonequilibrium fluctuation relations have been found in recent years. Fluctuation relations reveal the fundamental connection between the response of a physical system to aweak externally applied force and the fluctuations in the systemwithout the exter...

Although recent studies focused on the contribution of mitochondrial Ca2+ to the mechanisms of ischemia-reperfusion injury, the regulation of mitochondrial Ca2+ under pathophysiological conditions remains largely unclear. By using saponin-permeabilized rat myocytes, we measured mitochondrial membrane potential (DeltaPsi(m)) and mitochondrial Ca2+ concentration ([Ca2+](m)) at the physiological r...

This paper presents an interpretation in the Bond Graph domain of the Energy Shaping and Interconnection and Damping Assignment control methods, developed for the well-known Port-Controlled Hamiltonian Systems with Dissipation. In order to have a stable equilibrium at a prespecified state, the energy function is modified by adding storage elements to the BG such that the closedloop system energ...

Intramolecular dissipation has recently been invoked by S&lag, Grotemcyer and Levine to interpret dynamical processes in highly excited large molecules. In such problems there is diffusive motion in the presence of a potential. In addition, there are two (or mom) reaction processes which proceed at a finite rate. We present the solution of the Smoluchowski equation for the yields (branching fra...

We study the coexistence of the quantum Zeno-type effect and non-Markovianity for a system decaying in a structured bosonic environment and subject to a control field. The interaction with the environment induces decay from the excited to the ground level, which, in turn, is coherently coupled to another meta-stable state. The control of the strength of the coherent coupling between the stable ...

Scout II, an autonomous four-legged robot with only one actuator per compliant leg is described. We demonstrate the need to model the actuators and the power source of the robot system carefully in order to obtain experimentally valid models for simulation and analysis. We describe a new, simple running controller that requires minimal task level feedback, yet achieves reliable and fast running...

laboratory degradation studies were performed in water at ph 4.0, 7.0 and 9.2 using prochloraz (450 ec) formulation at the rates of 1.0 (t1) and 2.0 (t2) î¼g/ml. water samples collected on 0 (2h),3,7,15,30,45,60 and 90 days after treatments were processed for residue analysis of prochloraz by hplc-uv detector. in 60 days, dissipation was 89.12-90.53 % at ph 4.0, 84.10-88.17 % at ph 7.0, and 92....

laboratory degradation studies were performed in water at ph 4.0, 7.0 and 9.2 using benthiocarb (saturn 50 ec) formulation at the rates of 1.0 (t1) and 2.0 (t2) î¼g/ml. water samples collected on 0 (2h),3,7,15,30,45,60 and 90 days after treatments were processed for residue analysis of benthiocarb by gc-npd capillary system. in 60 days, dissipation was 92.82-93.81 % at ph 4.0, 89.12-90.63 % at ...