9,100 research outputs found
Heat conduction controlled combustion for scramjet applications
The use of heat conduction flame generated in a premixed supersonic stream is discussed. It is shown that the flame is controlled initially by heat conduction and then by chemical reaction. Such a flame is shorter than the diffusion type of flame and therefore it requires a much shorter burner. The mixing is obtained by injecting the hydrogen in the inlet. Then the inlet can be cooled by film cooling
Statistical Mechanics of Phase-Space Curves
We study the classical statistical mechanics of a phase-space curve. This
unveils a mechanism that, via the associated entropic force, provides us with a
simple realization of effects such as confinement, hard core, and asymptotic
freedom. Additionally, we obtain negative specific heats, a distinctive feature
of self-gravitating systems and negative pressures, typical of dark energy.Comment: 24 pages, 15 figure
Open Innovation, ambiguity and technological convergence
Objectives. Current paper aims to provide a fresh conceptual framework on the relationship among open innovation, decision ambiguity, and technological convergence. We argue that there is a curvilinear relationship between open innovation and both technological convergence and ambiguity. Contained level of convergence and ambiguity foster open innovation, whilst an excess of them is an impediment to collaboration. Technological convergence further acts as a moderator for ambiguity, in light of the benefits of isomorphism.
Methodology. We propose a conceptual framework for open innovation decisions after accurately reviewing the main literature antecedents.
Findings. We suggest an inverse u-shaped relationship between open innovation and either ambiguity or technological convergence.
Research limits. In future, the theoretical framework proposed by thus study has to be tested with robust and proper statistical techniques on large scale samples.
Practical implications. The model offers a heuristic for open innovation decisions under ambiguity.
Originality of the study. To the best of our knowledge, the relationship linking open innovation, technological convergence and ambiguity emerges as a literature gap. This study tackles this issue, proposing an interpretation for the analysis of alliances decision in innovation
3D Effects Of The Entropic Force
This work analyzes the classical statistical mechanics associated to
phase-space curves in three dimensions. Special attention is paid to the
entropic force. Strange effects like confinement, hard core, and asymptotic
freedom are uncovered. Negative specific heats, that were previously seen to
emerge in a one-dimensional setting, disappear in 3D, and with them,
gravitational effects of the entropic force.Comment: arXiv admin note: substantial text overlap with arXiv:1306.203
Physical peculiarities of divergences emerging in q-deformed statistics
It was found in [Europhysics Letters {\bf 104}, (2013), 60003] that classical
Tsallis theory exhibits poles in the partition function and the mean
energy . These occur at a countably set of the q-line. We give
here, via a simple procedure, a mathematical account of them. Further, by
focusing attention upon the pole-physics, we encounter interesting effects. In
particular, for the specific heat, we uncover hidden gravitational effects.Comment: 21 pages, 3 figures. Title has changed. Text has change
Investigation of peak shapes in the MIBETA experiment calibrations
In calorimetric neutrino mass experiments, where the shape of a beta decay
spectrum has to be precisely measured, the understanding of the detector
response function is a fundamental issue. In the MIBETA neutrino mass
experiment, the X-ray lines measured with external sources did not have
Gaussian shapes, but exhibited a pronounced shoulder towards lower energies. If
this shoulder were a general feature of the detector response function, it
would distort the beta decay spectrum and thus mimic a non-zero neutrino mass.
An investigation was performed to understand the origin of the shoulder and its
potential influence on the beta spectrum. First, the peaks were fitted with an
analytic function in order to determine quantitatively the amount of events
contributing to the shoulder, also depending on the energy of the calibration
X-rays. In a second step, Montecarlo simulations were performed to reproduce
the experimental spectrum and to understand the origin of its shape. We
conclude that at least part of the observed shoulder can be attributed to a
surface effect
A first order Tsallis theory
We investigate first-order approximations to both i) Tsallis' entropy
and ii) the -MaxEnt solution (called q-exponential functions ). It is
shown that the functions arising from the procedure ii) are the MaxEnt
solutions to the entropy emerging from i). The present treatment is free of the
poles that, for classic quadratic Hamiltonians, appear in Tsallis' approach, as
demonstrated in [Europhysics Letters {\bf 104}, (2013), 60003]. Additionally,
we show that our treatment is compatible with extant date on the ozone layer.Comment: 4 figures adde
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