4,958 research outputs found
Time Delay Effect on the Love Dynamical Model
We investigate the effect of time delay on the dynamical model of love. The
local stability analysis proves that the time delay on the return function can
cause a Hopf bifurcation and a cyclic love dynamics. The condition for the
occurrence of the Hopf bifurcation is also clarified. Through a numerical
bifurcation analysis, we confirm the theoretical predictions on the Hopf
bifurcation and obtain a universal bifurcation structure consisting of a
supercritical Hopf bifurcation and a cascade of period-doubling bifurcations,
i.e., a period doubling route to chaos.Comment: To appear in Journal of Korean Physical Societ
Continuous-Variable Nonclassicality Detection under Coarse-Grained Measurement
Coarse graining is a common imperfection of realistic quantum measurement,
obstructing the direct observation of quantum features. Under highly
coarse-grained measurement, we experimentally detect the continuous-variable
nonclassicality of both Gaussian and non-Gaussian states. Remarkably, we find
that this coarse-grained measurement outperforms the conventional fine-grained
measurement for nonclassicality detection: it detects nonclassicality beyond
the reach of the variance criterion, and furthermore, it exhibits stronger
statistical significance than the high-order moments method. Our work shows the
usefulness of coarse-grained measurement by providing a reliable and efficient
way of nonclassicality detection for quantum technologies
Chaotic universe in the z=2 Hovava-Lifshitz gravity
The deformed z=2 Horava-Lifshitz gravity with coupling constant w leads to a
nonrelativistic "mixmaster" cosmological model. The potential of theory is
given by the sum of IR and UV potentials in the ADM Hamiltonian formalism. It
turns out that adding the UV-potential cannot suppress chaotic behaviors
existing in the IR-potential.Comment: 7 pages, 5 figures, version to appear in PR
Electron Heat Flow Due to Magnetic Field Fluctuations
Radial heat transport induced by magnetic field line fluctuations is obtained from the integral parallel heat flow closure for arbitrary collisionality. The parallel heat flow and its radial component are computed for a single harmonic sinusoidal field line perturbation. In the collisional and collisionless limits, averaging the heat flow over an unperturbed surface yields Rechester-Rosenbluth like formulae with quantitative factors. The single harmonic result is generalized to multiple harmonics given a spectrum of small magnetic perturbations. In the collisionless limit, the heat and particle transport relations are also derived. © 2016 IOP Publishing Ltd
DS-ARP: A New Detection Scheme for ARP Spoofing Attacks Based on Routing Trace for Ubiquitous Environments
Despite the convenience, ubiquitous computing suffers from many threats and security risks. Security considerations in the ubiquitous network are required to create enriched and more secure ubiquitous environments. The address resolution protocol (ARP) is a protocol used to identify the IP address and the physical address of the associated network card. ARP is designed to work without problems in general environments. However, since it does not include security measures against malicious attacks, in its design, an attacker can impersonate another host using ARP spoofing or access important information. In this paper, we propose a new detection scheme for ARP spoofing attacks using a routing trace, which can be used to protect the internal network. Tracing routing can find the change of network movement path. The proposed scheme provides high constancy and compatibility because it does not alter the ARP protocol. In addition, it is simple and stable, as it does not use a complex algorithm or impose extra load on the computer system
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