98 research outputs found
On the exhaust of electromagnetic drive
Recent reports about propulsion without reaction mass have been met on one hand with enthusiasm and on the other hand with some doubts. Namely, closed metal cavities, when fueled with microwaves, have delivered thrust that could eventually maintain satellites on orbits using solar power. However, the measured thrust appears to be without any apparent exhaust. Thus the Law of Action-Reaction seems to have been violated. We consider the possibility that the exhaust is in a form that has so far escaped both experimental detection and theoretical attention. In the thruster's cavity microwaves interfere with each other and invariably some photons will also end up co-propagating with opposite phases. At the destructive interference electromagnetic fields cancel. However, the photons themselves do not vanish for nothing but continue in propagation. These photon pairs without net electromagnetic field do not reflect back from the metal walls but escape from the resonator. By this action momentum is lost from the cavity which, according to the conservation of momentum, gives rise to an equal and opposite reaction. We examine theoretical corollaries and practical concerns that follow from the paired-photon conclusion. (C) 2016 Author(s).Peer reviewe
Econometric Information Recovery in Behavioral Networks
In this paper, we suggest an approach to recovering behavior-related, preference-choice network information from observational data. We model the process as a self-organized behavior based random exponential network-graph system. To address the unknown nature of the sampling model in recovering behavior related network information, we use the Cressie-Read (CR) family of divergence measures and the corresponding information theoretic entropy basis, for estimation, inference, model evaluation, and prediction. Examples are included to clarify how entropy based information theoretic methods are directly applicable to recovering the behavioral network probabilities in this fundamentally underdetermined ill posed inverse recovery problem
Revisiting the Gaia Hypothesis: Maximum Entropy, Kauffman’s ‘Fourth Law’ and Physiosemeiosis
Recently, Kleidon suggested to analyze Gaia as a non-equilibrium
thermodynamic system that continuously moves away from equilibrium, driven by
maximum entropy production which materializes in hierarchically coupled
mechanisms of energetic flows via dissipation and physical work. I relate this
view with Kauffman's 'Fourth Law of Thermodynamics', which I interprete as a
proposition about the accumulation of information in evolutionary processes.
The concept of physical work is expanded to including work directed at the
capacity to work: I offer a twofold specification of Kauffman's concept of an
'autonomous agent', one as a 'self-referential heat engine', and the other in
terms of physiosemeiosis, which is a naturalized application of Peirce's theory
of signs. The conjunction of these three theoretical sources, Maximum Entropy,
Kauffman's Fourth Law, and physiosemeiosis, shows that the Kleidon restatement
of the Gaia hypothesis is equivalent to the proposition that the biosphere is
generating, processing and storing information, thus directly treating
information as a physical phenomenon. There is a fundamental ontological
continuity between the biological processes and the human economy, as both are
seen as information processing and entropy producing systems. Knowledge and
energy are not substitutes, with energy and information being two aspects of
the same underlying physical process
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