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A Survey on Wireless Mesh Networks and its Security Issues
R. Regan,J. Martin Leo Manickam 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.3
Wireless Mesh Networks (WMNs) are have secured a significant position in the technological world due to their unique characteristics. These networks are dynamic, self-healing, and self-organizing in which the nodes reflexively set-up and maintain mesh connectivity with each other. Having these characteristics, WMNs enjoy great benefits such as low-upfront costs, reliability, and prompt troubleshooting. Despite all these fringe benefits, one of the greatest challenges in wireless mesh networks is that they are exposed to a number of hazardous security vulnerabilities. In this paper we investigate WMNs security attacks, security goals and various defense mechanisms for defending the attacks.
Wormhole Detection Algorithm: To Detect Wormhole Attacks Efficiently in Wireless Networks
R. Regan,E. Dhivyadarsani,B. Nandhini,A. Priya 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.9
The way of remote specially appointed and sensor systems make them exceptionally alluring to aggressors. A standout amongst the most prevalent and genuine assaults in remote impromptu systems is wormhole assault and most proposed conventions to protect against this assault utilized situating gadgets, synchronized timekeepers, or directional reception apparatuses. We propose a novel calculation for identifying worm-opening assaults in remote multi-bounce systems. The proposed methodology is totally limited and, not at all like numerous procedures proposed in writing, does not utilize any exceptional equipment antique or area data, making the strategy all around appropriate. The calculation is autonomous of remote correspondence models. Be that as it may, learning of the model and hub dispersion gauges a parameter utilized as a part of the calculation. We display reproduction results for three diverse correspondence models and two distinctive hub circulations, and demonstrate that the calculation can recognize wormhole assaults with 100% discovery and 0% false caution probabilities at whatever point the system is associated with high likelihood. Notwithstanding for low thickness systems where a possibility of disengagement is high, the recognition likelihood stays high.
Oscillation criteria for second order differential inclusions
Ravi P. Agarwal,Said R. Grace,Donal O`Regan 장전수학회 2008 Advanced Studies in Contemporary Mathematics Vol.16 No.1
Some new criteria for the oscillation of second order dierential inclusion(a(t)y.(t)). ∈ F(t,y(t)) for a.e.t≥t0 ≥0 are established.
FIXED POINT THEORY FOR INWARD SET VALUED MAPS IN HYPERCONVEX METRIC SPACES
Amini-Harandi, A.,Farajzadeh, A.P.,O'Regan, D.,Agarwal, R.P. The Youngnam Mathematical Society Korea 2008 East Asian mathematical journal Vol.24 No.4
In this paper, we first introduce inwards set valued maps in hyperconvex metric spaces. Then we present fixed point theory for continuous condensing inward set valued maps.
ARRAKIS: atlas of resonance rings as known in the S<sup>4</sup>G
Comeró,n, S.,Salo, H.,Laurikainen, E.,Knapen, J. H.,Buta, R. J.,Herrera-Endoqui, M.,Laine, J.,Holwerda, B. W.,Sheth, K.,Regan, M. W.,Hinz, J. L.,Muñ,oz-Mateos, J. C.,Gil de Paz, A.,Men&eac Springer-Verlag 2014 Astronomy and astrophysics Vol.562 No.-
<P>Context. Resonance rings and pseudorings (here collectively called rings) are thought to be related to the gathering of material near dynamical resonances caused by non-axisymmetries in galaxy discs. This means that they are the result of secular evolution processes that redistribute material and angular momentum in discs. Studying them may give clues on the formation and growth of bars and other disc non-axisymmetries. Aims. Our aims are to produce a catalogue and an atlas of the rings detected in the Spitzer Survey of Stellar Structure in Galaxies (S<SUP>4</SUP>G) and to conduct a statistical study of the data in the catalogue. Methods. We traced the contours of rings previously identified and fitted them with ellipses. We found the orientation of bars by studying the galaxy ellipse fits from the S<SUP>4</SUP>G pipeline 4. We used the galaxy orientation data obtained by the S<SUP>4</SUP>G pipeline 4 to obtain intrinsic ellipticities and orientations of rings and the bars. Results. ARRAKIS contains data on 724 ringed galaxies in the S<SUP>4</SUP>G. The frequency of resonance rings in the S<SUP>4</SUP>G is of 16 ±1% and 35 ±1% for outer and inner features, respectively. Outer rings are mostly found in Hubble stages −1 ≤T≤ 4. Inner rings are found in a broad distribution that covers the range −1 ≤T≤7. We confirm that outer rings have two preferred orientations, namely parallel and perpendicular to the bar. We confirm a tendency for inner rings to be oriented parallel to the bar, but we report the existence of a significant fraction (maybe as large as 50%) of inner features that have random orientations with respect to the bar. These misaligned inner rings are mostly found in late-type galaxies (T ≥4). We find that the fraction of barred galaxies hosting outer (inner) rings is ~1.7 times (~1.3 times) that in unbarred galaxies. Conclusions. We confirm several results from previous surveys as well as predictions from simulations of resonant rings and/or from manifold flux tube theory. We report that a significant fraction of inner rings in late-type galaxies have a random orientation with respect to the bar. This may be caused by spiral modes that are decoupled from the bar and dominate the Fourier amplitude spectrum at the radius of the inner ring. The fact that rings are only mildly favoured by bars suggests that those in unbarred galaxies either formed because of weak departures from the axisymmetry of the galactic potential or that they are born because of bars that were destroyed after the ring formation.</P>
Fixed point theory for inward set valued maps in hyperconvex metric spaces
A. Amini-Harandi,,A. P. Farajzadeh,D. O’Regan,R. P. Agarwal 영남수학회 2008 East Asian mathematical journal Vol.24 No.4
In this paper, we first introduce inwards set valued maps in hyperconvex metric spaces. Then we present fixed point theory for continuous condensing inward set valued maps.
Sö,derströ,m, P.-A.,Walker, P.M.,Wu, J.,Liu, H.L.,Regan, P.H.,Watanabe, H.,Doornenbal, P.,Korkulu, Z.,Lee, P.,Liu, J.J.,Lorusso, G.,Nishimura, S.,Phong, V.H.,Sumikama, T.,Xu, F.R.,Yagi, A.,Zha North-Holland Pub. Co 2016 Physics letters. Section B Vol.762 No.-
<P><B>Abstract</B></P> <P>A detailed study of the structure of the doubly mid-shell nucleus Dy 104 1 66 170 has been carried out, following isomeric and <I>β</I> decay. We have measured the yrast band up to the spin-parity <SUP> J π </SUP> = <SUP> 6 + </SUP> state, the K = 2 <I>γ</I>-vibration band up to the <SUP> 5 + </SUP> state, a low-lying negative-parity band based on a <SUP> 2 − </SUP> state that could be a candidate for the lowest energy octupole vibration state within this nucleus, and a candidate for the <SUP> K π </SUP> = <SUP> 6 + </SUP> two quasi-particle isomer. This state was determined to have an excitation energy of 1643.91(23) keV and a half life of 0.99(4) μs, with a reduced hindrance for its decay to the ground-state band an order of magnitude lower than predicted by <SUB> N p </SUB> <SUB> N n </SUB> systematics. This is interpreted as being due to <I>γ</I>-vibrational mixing from a near degeneracy of the isomer and the <SUP> 6 + </SUP> state of the <I>γ</I> band. Furthermore, the parent nucleus <SUP>170</SUP>Tb has been determined to have a half-life of 0.91 ( − 13 + 18 ) s with a possible spin-parity of <SUP> 2 − </SUP> .</P>