In the present paper we study chemical potential of a generalized Hubbard model with correlated hopping at half-filling using a generalized mean-field approximation. For the special case of the model the approach reproduces the exact results: metalinsulator transition, ground state energy. Chemical potential of generelized Hubbard model with correlated hoppig as function of hopping integrals at...

In this paper, using the theory of polynomial residue class rings, a new construction is proposed for frequency hopping patterns having optimal Hamming autocorrelation with respect to the well-known Lempel-Greenberger bound. Based on the proposed construction, many new Peng-Fan optimal families of frequency hopping sequences are obtained. The parameters of these sets of frequency hopping sequen...

musa is one of the novel techniques in csa, which lays its foundation on linear goal programming, developed for overcoming prior csa models’ weaknesses such as coping with ordinal nature of data and low fitness. employing a simple questionnaire, musa develops the interval scale and the level of satisfaction as well as determining its determinants in addition to several fruitful indices. this pa...

Recent experiments on the quantum Hall effect [1,2] and on the hopping transport in 2D Si MOSFETs [3] and delta-doped GaAs/AlGaAs heterostructures [4] show that prefactor so in the exponential temperature dependence of the hopping conductivity has, under certain conditions, a universal form (e/h)f(T/T0) with f ≈1 at T ≈ T0. Aleiner et al. [5] have remarked that such an effect can be due to hopp...

As red kangaroos hop faster over level ground, their rate of oxygen consumption (indicating metabolic energy consumption) remains nearly the same. This phenomenon has been attributed to exceptional elastic energy storage and recovery via long compliant tendons in the legs. Alternatively, red kangaroos may have exceptionally efficient muscles. To estimate efficiency, we measured the metabolic co...

In human and animal motor control several sensory organs contribute to a network of sensory pathways modulating the motion depending on the task and the phase of execution to generate daily motor tasks such as locomotion. To better understand the individual and joint contribution of reflex pathways in locomotor tasks, we developed a neuromuscular model that describes hopping movements. In this ...

From a hopping rate equation for disordered materials we derive a macroscopic drift{di usion equation. For this purposes two space{time scales are simultaneously considered. The microscopic dynamics is characterized by the distribution of localized states and the hopping rate. On the macroscopic space scale both the hopping rate and the disordered material are allowed to be inhomogeneous.

We analyze thermal rate constants as computed with surface hopping dynamics and resolve certain inconsistencies that have permeated the literature. On one hand, according to Landry and Subotnik (J. Chem. Phys. 2012, 137, 22A513), without decoherence, direct dynamics with surface hopping overestimates the rate of relaxation for the spin-boson Hamiltonian. On the other hand, according to Jain and...