Results 271 to 280 of about 1,107,923 (314)

Energy of Flows on Percolation Clusters

Potential Analysis, 2001
Consider a percolation process with parameter \(p\) on \(\mathbb{Z}^d\) \((d\geq 3)\). Let \(h\) be a decreasing function such that \(\sum{1\over jh(j^{-1})}< \infty\) and \(H_h(u)/u\) is concave (where \(H_h(u):= u^{d/(d-1)}/h(u)\) is the associated gauge function). If \(p> p_c\), the authors prove the existence a.s. of a nonzero flow on \({\mathcal C}
Hoffman, Christopher, Mossel, Elchanan
openaire   +2 more sources

Is the Photon a Self-Energy Flow or a Mutual-Energy Flow?

Open Access Journal of Applied Science and Technology
In classical electromagnetic theory, energy flow density is described by the Poynting vector, while in quantum mechanics, the concept of probability current exists. These flows are all generated by the source and are referred to here as self-energy flows.
openaire   +1 more source

Energy flow

2006
AbstractThe second law of thermodynamics is central to understanding ecology, although it is ignored by most ecology text books. It follows from the second law that all organisms must draw free energy from their environment and return waste products back to their environment.
openaire   +1 more source

Display of the flow of energy in molecules

Journal of Computational Chemistry, 1994
AbstractIn this article, we develop a method to graphically display the flow of energy within molecules. An energy continuity equation is derived leading to a molecular energy flux vector field. Computation of the flux calls for the intramolecular potential, any external interactions, and the phase space trajectories of the molecular motion.
Charles D. Schwieters, Herschel Rabitz
openaire   +1 more source

Energy Flow in DNA Duplexes

2009
This chapter focuses on the singlet excited states of model DNA helices with simple base sequence: poly(dGdC).poly(dGdC), poly(dAdT).poly(dAdT) and poly(dA).poly(dT). We discuss their absorption spectra, which reect the properties of Franck-Condon states, in connection with theoretical studies, performed in the frame of the exciton theory taking into ...
Markovitsi, D., Gustavsson, T.
openaire   +1 more source

"Virial Theorem" for the Flow of Energy

Physical Review, 1955
Expressions are obtained for the flow of energy and momentum in assemblies of densely packed molecules, using a generalized virial theorem. They differ to some extent from expressions put forward by previous authors who had only derived the divergence of the flow vectors. Classical results are shown to be valid also in quantum mechanics.
openaire   +2 more sources

Energy Loss in Dividing Flow

1992
Hydrodynamic phenomenon, occurring at the junction where a dividing flow is present, is extremely complex and greatly varies according to modifications in discharge conditions near the junction. This is a theoretical and experimental study of free surface dividing flow phenomena in rectangular, horizontal channels with particular attention to energy ...
Peruginelli A, PAGLIARA, STEFANO
openaire   +2 more sources

The Flow of Energy in the Biosphere

Scientific American, 1971
openaire   +2 more sources

Improvement of energy performance of the axial-flow pump by groove flow control technology based on the entropy theory

Energy, 2023
Rui Zhang, Zhaodan Fei, Jiangang Feng
exaly  

Biotic Energy Flows

Science, 1974
openaire   +2 more sources