Security is one of the major challenges in open network. There are so many types of attacks which follow fixed patterns or frequently change their patterns. It is difficult to find the malicious attack which does not have any fixed patterns. The Distributed Denial of Service (DDoS) attacks like Botnets are used to slow down the system performance. To address such problems Collaborative Network ...

Natural killer (NK)-like cells have been implicated as an important component of the endometrial lymphoid cell population and have been suggested to play roles in resistance to viral infection, in abortion, and in fetal growth. Inhibition of endometrial NK cell activity may be an important aspect of successful pregnancy because of the potential for actions directed against the conceptus. The ai...

Este trabajo es relevante y significativo, dado que obedeció a una situación problemática. En ese sentido, se planteó como propósito interpretar el estado actual en encuentra la educación virtual contexto de las universidades. Caso estudio, Universidad Técnica Manabí (UTM). La metodología fue desarrollada bajo paradigma interpretativo, con enfoque cualitativo método hermenéutico. técnica utiliz...

This note examines the second virial coefficient for an imperfect gas subject to a 2n-n interparticle potential in any dimension d between 0 and n. A compact analytic expression is presented for this quantity which shows that, apart from a numerical factor, its temperature dependence is a universal function parameterized by d/n.

The coordinates of a location obtained from a Global Positioning System (GPS) receiver depend on the type of environments. This paper discusses the errors in GPS coordinate conversion from the World Geodetic System 84 (WGS84) to the Universal Transverse Mercator (UTM) system, in different environments and their reduction using Kalman filter. 30 samples of positional coordinates, each for three ...

Small unmanned aircraft systems are envisioned to play a major role in surveilling critical assets, collecting data, and delivering goods. Large scale operations are expected to happen in low altitude airspace in the near future, where many static and dynamic constraints exist. High sensitivity to wind and high maneuverability are unique characteristics of these vehicles, which bring great chal...

It is established that for any q > 2 the permutation automorphism group of a q-ary Hamming code of length n = (q − 1)/(q− 1) is isomorphic to the unitriangular group UTm(q).

We present the rotation curves of 967 spiral galaxies, obtained by deprojecting and folding the raw Hα data published by Mathewson et al.(1992). Of these, 80 meet objective excellence criteria and are suitable for individual detailed mass modelling, while 820 are suitable for statistical studies. A preliminary analysis of their properties confirms that rotation curves are a universal function o...

The surface-modified zinc phosphate (Zn3(PO4)2) nanocrystals were synthesized by a facile and efficient one-step ultrasonic-template-microwave (UTM) assisted route. The crystal structure, optical properties and morphologies of zinc phosphate nanocrystals were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy and transmission electron microscope. And...