Results 11 to 20 of about 66,097 (130)

THE GENERAL BIOLOGY COURSE AND THE TEACHING OF ELEMENTARY BOTANY AND ZOOLOGY IN AMERICAN COLLEGES AND UNIVERSITIES. [PDF]

open access: greenScience, 1919
THE general biology, or elementary biology, course originated with Huxley about fifty years ago and was introduced into this country by the physiologist. H. Newall Martin. one of Huxley's earlier students.
G. E. Nichols
semanticscholar   +2 more sources

Zoology of Graviton non-Gaussianities [PDF]

open access: yes, 2021
We characterize graviton non-Gaussianities in models of inflation where de Sitter boosts are spontaneously broken. We discuss which of the symmetry breaking patterns studied in Nicolis et al., 2015 can sustain a period of quasi de Sitter expansion, and show that the symmetry breaking pattern of Solid Inflation allows the most freedom for graviton ...
arxiv   +1 more source

Self-healing of structured light: a review [PDF]

open access: yes, 2022
Self-healing of light refers to the ability of a light field to recover its structure after being damaged by a partial obstruction placed in its propagation path. Here, we will give a comprehensive review of the history and development of self-healing effects, especially highlighting its importance in vector vortex beams carrying spin and orbital ...
arxiv   +1 more source

A framework to evaluate whether to pool or separate behaviors in a multilayer network [PDF]

open access: yesCurrent Zoology, 2021, 2020
A multilayer network approach combines different network layers, which are connected by interlayer edges, to create a single mathematical object. These networks can contain a variety of information types and represent different aspects of a system. However, the process for selecting which information to include is not always straightforward. Using data
arxiv   +1 more source

Meta-dynamical adaptive systems and their applications to a fractal algorithm and a biological model [PDF]

open access: yesPhysica D 207 (2005) 79-90, 2007
In this article, one defines two models of adaptive systems: the meta-dynamical adaptive system using the notion of Kalman dynamical systems and the adaptive differential equations using the notion of variable dimension spaces. This concept of variable dimension spaces relates the notion of spaces to the notion of dimensions.
arxiv   +1 more source

Cylinder morphology of a stretched and twisted ribbon [PDF]

open access: yesPhys. Rev. E 98, 012801 (2018), 2018
A rich zoology of shapes emerges from a simple stretched and twisted elastic ribbon. Despite a lot of interest, all these shape are not understood, in particular the shape that prevails at large tension and twist and that emerges from a transverse instability of the helicoid. Here, we propose a simple description for this cylindrical shape.
arxiv   +1 more source

Shocks and cold fronts in galaxy clusters [PDF]

open access: yesPhys.Rept.443:1-53,2007, 2007
Table of contents (abridged): COLD FRONTS Origin and evolution of merger cold fronts Cold fronts in cluster cool cores . . . Simulations of gas sloshing. Origin of density discontinuity. . . . Effect of sloshing on cluster mass estimates and cooling flows. Zoology of cold fronts COLD FRONTS AS EXPERIMENTAL TOOL Velocities of gas flows
arxiv   +1 more source

Penguin Zoology in $B\toππ$ and the Extraction of the CKM Angle $α$ [PDF]

open access: yesPhys.Lett. B397 (1997) 269-274, 1996
We reanalyze the decay $B_d\to\pi^+\pi^-$ without assuming dominance of QCD penguins with internal top-quark exchanges. In that case the weak phase of the $\bar b \to\bar d$ QCD penguin amplitude is not related in a simple way to the CKM angle $\beta$. Nevertheless it is still possible to extract the CKM angle $\alpha$ in a transparent and almost model-
arxiv   +1 more source

Zoology of heterotic supercurrent supermultiplets in d=2 [PDF]

open access: yes, 2013
We present various (0,2) heterotic supercurrent supermultiplets in (1+1) dimensional quantum field theories. From the minimal supercurrent supermultiplets, we deduce conditions on symmetry enhancement such as Lorentz invariance, (chiral) dilatation invariance, R-invariance, (chiral) conformal invariance and their various combinations.
arxiv   +1 more source

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