Results 31 to 40 of about 3,564,866 (292)
Classification of charge density waves based on their nature [PDF]
Proceedings of the National Academy of Sciences, 2015 Significance Charge density waves (CDWs) are observed in many solids, especially in low-dimensional systems. Their existence was first predicted in the 1930s by Rudolf Peierls, who prophesied that CDWs would exist in an ideal one-dimensional (1D) chain of atoms, lowering the energy of the system and driving a reconstruction of the lattice. In
Zhu, Xuetao +4 more
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Locally Optimally Emitting Clouds and the Origin of Quasar Emission Lines [PDF]
, 1995 The similarity of quasar line spectra has been taken as an indication that the emission line clouds have preferred parameters, suggesting that the environment is subject to a fine tuning process.
Boyle B. J. +9 more
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Density‐dependent natural selection mediates harvest‐induced trait changes [PDF]
Ecology Letters, 2019 Abstract Rapid life‐history changes caused by size‐selective harvesting are often interpreted as a response to direct harvest selection against a large body size. However, similar trait changes may result from a harvest‐induced relaxation of natural selection for a large body size via density‐dependent selection.
Alix Bouffet-Halle +8 more
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Jurnal Ilmiah Perikanan dan Kelautan, 2011 The growth of shrimp larvae are depend on several factors, such as natural feed. These natural feed must consist protein, carbohydrate and lipid to support survival rate. The best growth of post larvae of giant shrimp are found by Artemia sp.
Hendri Gustrifandi
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Scalar nature of the nuclear density functional [PDF]
Physical Review C, 2008 Because of the rotational invariance of the nuclear Hamiltonian, there exists a density functional for nuclei that depends only on two scalar densities. Practical calculations boil down to radial, one-dimensional ones.
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Petroleum, 2017 Density is an important property of natural gas required for the design of gas processing and reservoir simulation. Due to expensive measurement of density, industry tends to predict gas density through an EOS.
Amir Hossein Saeedi Dehaghani +1 more
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Natural density of rectangular unimodular integer matrices
Linear Algebra and its Applications, 2011 In this paper, we compute the natural density of the set of k x n integer matrices that can be extended to an invertible n x n matrix over the integers. As a corollary, we find the density of rectangular matrices with Hermite normal form [O Id]. Connections with Cesaro's Theorem on the density of coprime integers and Quillen-Suslin's Theorem are also ...
Maze, G, Rosenthal, J, Wagner, U
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Conservation Laws and Variational Sequences in Gauge-Natural Theories
, 2003 In the classical Lagrangian approach to conservation laws of gauge-natural field theories a suitable (vector) density is known to generate the so--called {\em conserved Noether currents}. It turns out that along any section of the relevant gauge--natural
Fatibene, L. +2 more
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Density of solutions to quadratic congruences [PDF]
, 2016 A classical result in number theory is Dirichlet's theorem on the density of primes in an arithmetic progression. We prove a similar result for numbers with exactly k prime factors for k>1. Building upon a proof by E.M.
Prabhu, Neha
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Frontiers in Plant Science, 2022 Big-sized trees, species diversity, and stand density affect aboveground biomass in natural tropical and temperate forests. However, these relationships are unclear in arid natural forests and plantations.
Bai-Yu Yang +10 more
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