División de Nanociencias y Materiales: Envíos recientes
Mostrando ítems 461-480 de 604
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Adsorption of molecular gases on porous materials in the SAFT-VR approximation
(2010)"A simple molecular thermodynamic approach is applied to the study of the adsorption of gases of chain molecules on solid surfaces. We use a model based on the Statistical Associating Fluid Theory for Variable Range (SAFT-VR) ... -
High-gain nonlinear observer for simple genetic regulation process
(Elsevier, 2007)"High-gain nonlinear observers occur in the nonlinear automatic control theory and are in standard usage in chemical engineering processes. We apply such a type of analysis in the context of a very simple one-gene reg-ulation ... -
Inferring mixed-culture growth from total biomass data in a wavelet approach
(Elsevier, 2006)"It is shown that the presence of mixed-culture growth in batch fermentation processes can be very accurately inferred from total biomass data by means of the wavelet analysis for singularity detection. This is accomplished ... -
Evolution of spherical cavitation bubbles: parametric and closed-form solutions
(2016)"We present an analysis of the Rayleigh-Plesset equation for a three dimensional vacuous bubble in water. In the simplest case when the effects of surface tension are neglected, the known parametric solutions for the radius ... -
A robust estimation of the exponent function in the Gompertz law
(Elsevier, 2006)"The estimation of the solution of a system of two differential equations introduced by Norton et al. (1976) that is equivalent to the famous Gompertz growth law is performed by means of the recent adaptive scheme of ... -
One-parameter families of supersymmetric isospectral potentials from Riccati solutions in function composition form
(2014)"In the context of supersymmetric quantum mechanics, we define a potential through a particular Riccati solution of the composition form (F ◦ f)(x) = F(f(x)) and obtain a generalized Mielnik construction of one-parameter ... -
Inhomogeneous barotropic FRW cosmologies with constant-shifted conformal hubble parameters
(2013)"It is known that the barotropic FRW system of differential equations for zero cosmological constant can be reduced to simple harmonic oscillator (HO) differential equations in the conformal time variable. This is due to ... -
Nongauge bright soliton of the nonlinear Schrödinger (NLS) equation and a family of generalized NLS equations
(2016)"We present an approach to the bright soliton solution of the nonlinear Schrödinger (NLS) equation from the standpoint of introducing a constant potential term in the equation. We discuss a "nongauge" bright soliton for ... -
Barotropic FRW cosmologies with Chiellini damping in comoving time
(2015)"For nonzero cosmological constant ?, we show that the barotropic FRW cosmologies as worked out in the comoving time lead in the radiation-dominated case to scale factors of identical form as for the Chiellini dissipative ... -
Quantum Hamiltonians and prime numbers
(2003)"A short review of Schrödinger Hamiltonian for which the spectral problem has beenVrelated in the literature to the distribution of the prime numbers is presented here. WeVnotice a possible connection between prime numbers ... -
Note on Hawking-Unruh effects in graphene
(2012)"Beltrami-shaped graphene sheets have been recently proposed as analogs of curved spacetimes with Hawking-Unruh e?ects detected through typi-cal condensed matter measurements involving scanning tunneling micro-scopes and ... -
Barotropic FRW cosmologies with a Dirac-like parameter
(2004)"Using the known connection between Schroedinger-like equations and Dirac-like equations in the supersymmetric context, we discuss an extension of FRW barotropic cosmologies in which a Dirac mass-like parameter is introduced. ... -
Integrable Abel equations and Vein's Abel equation
(2016)"We first reformulate and expand with several novel findings some of the basic results in the integrability of Abel equations. Next, these results are applied to Vein's Abel equation whose solutions are expressed in terms ... -
On arithmetic detection of grey pulses with application to Hawking radiation
(2002)"Micron-sized black holes do not necessarily have a constant horizon temperature distribution. The black hole remote-sensing problem means to find out the "surface" temperature distribution of a small black hole from the ... -
KdV adiabatic index solitons in barotropic open FRW cosmologies
(2002)"Applying standard mathematical methods, it is explicitly shown how the Riccati equation for the Hubble parameter H() of barotropic open FRW cosmologies is connected with a Korteweg-de Vries equation for adiabatic index ... -
Eigenvalue problems, spectral parameter power series, and modern applications
(2015)"Our review is dedicated to a wide class of spectral and transmission problems arising in di?erent branches of applied physics. One of the main di?culties in studying and solving eigenvalue problems for operators with ... -
Spectral parameter power series representation for Hill´s discriminant
(Elsevier, 2010)"We establish a series representation of the Hill discriminant based on the spectral parameter power series (SPPS) recently introduced by V. Kravchenko. We also show the invariance of the Hill discriminant under a Darboux ... -
Cellular automata modeling of continuous stirred tank reactors
(2008)"The classical dynamical systems model of continuous stirred tank reactors (CSTR) in which a first order chemical reaction takes place is reformulated in terms of stochastic cellular automata by extending previous works of ... -
A note on Verhulst's logistic equation and related logistic maps
(2010)"We consider the Verhulst logistic equation and a couple of forms of the corresponding logistic maps. For the case of the logistic equation we show that using the general Riccati solution only changes the initial conditions ... -
Classical harmonic oscillator with Dirac-like parameters and possible applications
(2004)"We obtain a class of parametric oscillation modes that we call K-modes with damping and absorption that are connected to the classical harmonic oscillator modes through the “supersymmetric” one-dimensional matrix procedure ...