Results 11 to 20 of about 16,955,935 (308)

Nonadiabatic dynamics in multidimensional complex potential energy surfaces. [PDF]

open access: yesChem Sci, 2020
Despite the continuous development of theoretical methodologies for describing nonadiabatic dynamics of molecular systems, there is a lack of approaches for processes where the norm of the wave function is not conserved, i.e., when an imaginary potential
Kossoski F, Barbatti M.
europepmc   +4 more sources

The Moments of Certain Complex Potentials [PDF]

open access: yesProceedings of the American Mathematical Society, 1986
Let M M be a compact homogeneous space, let
Fegan, Howard D., Gilkey, Peter B.
openaire   +2 more sources

Electrical Potentials in Stomatal Complexes [PDF]

open access: yesPlant Physiology, 1981
Guard cells of several species, but predominantly Commelina communis, were impaled by micropipette electrodes and potential differences measured that occurred between cell compartments and the flowing bathing medium. The wall developed a Donnan potential that was between -60 and -70 millivolt in 30 millimolar KCl at pH 7.
R A, Saftner, K, Raschke
openaire   +2 more sources

Cryptographic Puzzles and Complex Systems

open access: yes, 2021
A puzzle lies behind password authentication (PA) and blockchain proof of work (PoW). A cryptographic hash function is commonly used to implement them. The potential problem with secure hash functions is their complexity and rigidity.
Vuckovac, Rade
core   +1 more source

Do evolutionary algorithm dynamics create complex network structures? [PDF]

open access: yes, 2021
This paper presents a novel method for visualizing the dynamics of evolutionary algorithms in the form of complex networks. We discuss the analogy between individuals in populations in an arbitrary evolutionary algorithm and vertices of a complex network,
Jašek, Roman   +3 more
core   +1 more source

Flow in Fractured Porous Media Modeled in Closed-Form: Augmentation of Prior Solution and Side-Stepping Inconvenient Branch Cut Locations

open access: yesFluids, 2020
Carefully chosen complex variable formulations can solve flow in fractured porous media. Such a calculus approach is attractive, because the gridless method allows for fast, high-resolution model results.
Ruud Weijermars, Aadi Khanal
doaj   +1 more source

Complex Potentials

open access: yesJournal of Mathematical Analysis and Applications, 1999
The authors show that complex potentials associated with locally sourceless and locally irrotational flows defined on (possibly infinitely connected) domains in the complex plane have logarithmic singularities. Additionally, some applications to flows around contours are given.
Boettger, Ulrich   +2 more
openaire   +1 more source

Quantum complex Hénon–Heiles potentials [PDF]

open access: yesPhysics Letters A, 2001
Quantum-mechanical PT-symmetric theories associated with complex cubic potentials such as V=x^2+y^2+igxy^2 and V=x^2+y^2+z^2+igxyz, where g is a real parameter, are investigated. These theories appear to possess real, positive spectra. Low-lying energy levels are calculated to very high order in perturbation theory.
Simsek, M   +3 more
openaire   +4 more sources

ORGANISMAL COMPLEXITY AND THE POTENTIAL FOR EVOLUTIONARY DIVERSIFICATION [PDF]

open access: yesEvolution, 2014
We present two theoretical approaches to investigate whether organismal complexity, defined as the number of quantitative traits determining fitness, and the potential for adaptive diversification are correlated. The first approach is independent of any specific ecological model and based on curvature properties of the fitness landscape as a function ...
Svardal, Hannes   +2 more
openaire   +3 more sources

Calculation of the Lowest Resonant States of H− and Li by the Complex Absorbing Potential Method

open access: yesAtoms, 2021
The analysis of the features of the method of complex absorbing potential (CAP) is carried out for a single-channel problem with an explicit parameterization of the scattering matrix.
Sergey O. Adamson   +4 more
doaj   +1 more source

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