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Nuclear Physics B, 2004 This paper deals with the thermodynamic properties of a phantom field in a flat Friedmann-Robertson-Walker universe. General expressions for the temperature and entropy of a general dark-energy field with equation of state $p= $ are derived from which we have deduced that, whereas the temperature of a cosmic phantom fluid ($
González-Díaz, Pedro F. +1 more
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Phantom maps and chromatic phantom maps [PDF]
American Journal of Mathematics, 2000 In the first part, we determine conditions on spectra X and Y under which either every map from X to Y is phantom, or no nonzero maps are. We also address the question of whether such all or nothing behavior is preserved when X is replaced with V Λ X for V finite. In the second part, we introduce chromatic phantom maps.
Mark Hovey, J. Daniel Christensen
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Phantom depth and stable phantom exactness [PDF]
Transactions of the American Mathematical Society, 2007 Phantom depth, phantom nonzerodivisors, and phantom exact sequences are analogues of the non-“phantom” notions which have been useful in tackling the (very difficult) localization problem in tight closure theory. In the present paper, these notions are developed further and partially reworked. For instance, although no analogue of a long exact sequence
Neil Epstein, Neil Epstein
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A Hybrid Multi-Distance Phase and Broadband Spatially Resolved Spectrometer and Algorithm for Resolving Absolute Concentrations of Chromophores in the Near-Infrared Light Spectrum [PDF]
, 2010 For resolving absolute concentration of tissue chromophores in the human adult brain with near-infrared spectroscopy it is necessary to calculate the light scattering and absorption, at multiple wavelengths with some depth resolution.
Cooper, CE +5 more
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Modern Physics Letters A, 2006 The Observed Perlmutter-Riess Acceleration (OPRA) implies that the expansion of the Universe is currently increasing and is motivation for the so-called phantom energy models. We consider the dynamics of phantom scalar field models. An important physical time constraint, which can be used to rule out many cosmological models, is obtained from the ...
J. Latta, Alan Coley, Sigbjørn Hervik
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MPI Phantom Study with A High-Performing Multicore Tracer Made by Coprecipitation [PDF]
, 2019 Magnetic particle imaging (MPI) is a new imaging technique that detects the spatial distribution of magnetic nanoparticles (MNP) with the option of high temporal resolution.
Eberbeck, Dietmar +8 more
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Influence of wall thickness and diameter on arterial shear wave elastography: a phantom and finite element study [PDF]
, 2017 Quantitative, non-invasive and local measurements of arterial mechanical properties could be highly beneficial for early diagnosis of cardiovascular disease and follow up of treatment.
Bini, Fabiano +6 more
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Vision Research, 2015 It is well known that visible luminance gradients may generate contrast effects. In this work we present a new paradoxical illusion in which the luminance range of gradual transitions has been reduced to make them invisible. By adopting the phenomenological method proposed by Kanizsa, we have found that unnoticeable luminance gradients still generate ...
GALMONTE, ALESSANDRA +3 more
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