2,394 research outputs found
Time resolved pattern evolution in a large aperture laser
We have measured quasi-instantaneous transverse patterns in a broad aperture
laser. Non-ordered patterns yielding to boundary determined regular structures
in progressive time-integrated recording are observed. The linear analysis and
numerical integration of the full Maxwell-Bloch equations allow us to interpret
the features of the experiment. We show that this system being far from
threshold cannot be fully understood with a perturbative model.Comment: 7 pages, 5 GIF figures . To be published in Phys. Rev. Let
χάριζ χάριν ψάρ έστιν ή τίκτονσ' άεί. Una lectura de Sófocles, Áyax 522
La χάριζ y la ética de la reciprocidad que este concepto implica son imprescindibles para comprender Áyax, la primera tragedia conservada de Sófocles. En concreto, nosotros proponemos una reflexión sobre la utilización de este término en el v. 522 y una nueva lectura, que implica una revaloración de la escena y una mejor comprensión de la fuerza retórica que subyace en el pasaje y, en general, en todo el discurso de Tecmesa del que este verso forma parte.χάριζ and the ethics of reciprocity that this concept involves are essential to understand Ajax, the first Sophoclean tragedy which is still extant. In particular, we propose a reflexion about the use of this term in v. 522 and a new reading, which involves a revaluation of the scene and a better comprehension of the rhetorical effect that underlies in the passage and, in general, along Tecmessa's speech, to which this verse belongs
The Role of Intuition in Metaphysics
In this paper I consider the possibility of a kind of a priori cognition that serves the purposes of metaphysics, given that metaphysics involves the search for modal knowledge. Necessary or, better, modal knowledge is a priori; so metaphysical knowledge is likewise a priori. Here I argue that intuition is the route to modal knowledge in metaphysics, and I insist that conceivability or knowledge of conceptual truths does not lead towards the modal realm of metaphysics
Magnetic force microscopy investigation of arrays of nickel nanowires and nanotubes
The magnetic properties of arrays of nanowires (NWs) and nanotubes (NTs), 150
nm in diameter, electrodeposited inside nanoporous polycarbonate membranes are
investigated. The comparison of the nanoscopic magnetic force microscopy (MFM)
imaging and the macroscopic behavior as measured by alternating gradient force
magnetometry (AGFM) is made. It is shown that MFM is a complementary technique
that provides an understanding of the magnetization reversal characteristics at
the microscopic scale of individual nanostructures. The local hysteresis loops
have been extracted by MFM measurements. The influence of the shape of such
elongated nanostructures on the dipolar coupling and consequently on the
squareness of the hysteresis curves is demonstrated. It is shown that the
nanowires exhibit stronger magnetic interactions than nanotubes. The
non-uniformity of the magnetization states is also revealed by combining the
MFM and AGFM measurements.Comment: 7 pages, 5 figure
Inventario espeleológico de Mallorca
Abstract not availabl
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