The presence of voltage controlled negative differential resistance was observed in conduction characteristics recorded at room temperature for 300 nm thick spin-coated films of graphene oxide (GO) sandwiched between indium tin oxide (ITO) substrates and top electrodes of sputtered gold (Au) film. The GO crystallites were found from the X-ray diffraction studies to have an average size in the o...

In this paper, the Chebyshev spectral collocation method(CSCM) for one-dimensional linear hyperbolic telegraph equation is presented. Chebyshev spectral collocation method have become very useful in providing highly accurate solutions to partial differential equations. A straightforward implementation of these methods involves the use of spectral differentiation matrices. Firstly, we transform ...

This paper presents the design of an ontology to support the assessment process in the technical-scientific subjects (Differential Calculus, Physical, Chemical, among others) which are taught in the firsts years of bachelor’s degree at Instituto Tecnológico de Orizaba (ITO). E-learning is one of the current strategies that facilitates the process of evaluation through the use of Web environment...

This study quantifies the dynamic attachment and spreading of porcine pulmonary artery endothelial cells (PPAECs) on optically thin, indium tin oxide (ITO) biosensors using simultaneous differential interference contrast microscopy (DICM) and electrical microimpedance spectroscopy. A lock-in amplifier circuit monitored the impedance of PPAECs cultivated on the transparent ITO bioelectrodes as a...

The spline collocation method  is employed to solve a system of linear and nonlinear Fredholm and Volterra integro-differential equations. The solutions are collocated by cubic B-spline and the integrand is approximated by the Newton-Cotes formula. We obtain the unique solution for linear and nonlinear system $(nN+3n)times(nN+3n)$ of integro-differential equations. This approximation reduces th...

In this article, we demonstrate a low-thermal budget defect-engineered process to achieve top-gated (TG) oxide–semiconductor ferroelectric field-effect transistors (FeFETs). The demonstrated TG FeFETs, with the channel length scaled down 40 nm, exhibit highly stabilized memory window (MW) of 2 V and high current ON/ OFF ratio <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:...

We prove that the author’s powersum formula yields a nonzero expression for a particular linear ordinary differential equation, called a resolvent, associated with a univariate polynomial whose coefficients lie in a differential field of characteristic zero provided the distinct roots of the polynomial are differentially independent over constants. By definition, the terms of a resolvent lie in...

Nobuyuki Wada ([email protected]) Kiminori Sugino ([email protected]) Takashi Mimura ([email protected]) Mitsuji Nagahama ([email protected]) Wataru Kitagawa ([email protected]) Hiroshi Shibuya ([email protected]) Keiko Ohkuwa ([email protected]) Hirotaka Nakayama ([email protected]) Shohei Hirakawa ([email protected]) Yasushi Rino (rino...

The energy preserving average vector field (AVF) integrator is applied to evolutionary partial differential equations (PDEs) in bi-Hamiltonian form with nonconstant Poisson structures. Numerical results for the Korteweg de Vries (KdV) equation and for the Ito type coupled KdV equation confirm the long term preservation of the Hamiltonians and Casimir integrals, which is essential in simulating ...