Variety of methods for traffic policing such as windowing algorithm and LEAKY BUCKET for computer networks have been proposed in the literatures. The windowing algorithm works well for packet networks but it is not appropriate for High speed networks such as ATM. In this paper, a new group of traffic policers for ATM network has been proposed. These proposed traffic policers are obtained by improving the LEAKY BUCKET method. Learning automata is used to adapt the parameters of the LEAKY BUCKET according to the behavior of the traffic sources. To study the effectiveness of the proposed methods, computer simulations have been conducted. The results of simulation have shown that the proposed methods reduce the percentage of the cell loss. The proposed traffic policer works well for the situations where the traffic characteristics. Of the source are unknown.

In this study, new optical LEAKY wave antennas are proposed to form light in an arbitrary manner for operation at the standard optical telecommunication wavelength of 1550 nm. The proposed antennas are designed based on hybrid plasmonic structures in which pattern synthesis is provided by modulation of the thickness of the silicon layer. The modulation of thickness changes the light velocity in the structure leading to different leakage rates through the antenna. Comparing the structure proposed in this paper with previously reported optical LEAKY wave antennas, the proposed design has the potential for integration with other devices and also provides any desired radiation pattern in wide bandwidth of operation. The proposed antennas can have applications in Light Detection and Ranging System (LIDARS), optical wireless communication, and solar cell efficiency improvement.

‎BUCKET recursive trees are an interesting and natural generalization of recursive trees‎. ‎In this model the nodes are BUCKETs that can hold up to b≥ 1 labels‎. ‎The (modified) Zagreb index of a graph is defined as the sum of‎ ‎the squares of the outdegrees of all vertices in the graph‎. ‎We give the mean and variance of this index in random BUCKET recursive trees‎. ‎Also‎, ‎two limiting results on this index are given‎.

In this paper, a new LEAKY wave antenna (LWA) is introduced. The proposed antenna radiates through a dielectric aperture created by half mode substrate integrated waveguide (HMSIW) technique. A sample antenna is designed and simulated and its radiation characteristics are investigated. It is illustrated that half conical radiation pattern is provided by the proposed antenna. The designed antenna is also fabricated and its radiation properties are measured. Results show that the proposed antenna has the advantages of wide bandwidth, enhanced scanning angle and high gain in addition to low profile, low fabrication cost, low weight. Radiation patterns of antenna at different frequencies are theoretically calculated and compared with simulated ones. Good agreement between simulated and calculated results proves the validity of the theory presented for the calculation of radiation patterns. Moreover, its common features including high directivity and beam steering capability which make it suitable for millimeter-wave applications.

If G is a connected graph with vertex set V, then the eccentric connectivity index of G, xc (G), is defined as ånÎV (G) deg (n) ecc (n) where deg (n) is the degree of a vertex n and ecc (n) is its eccentricity. In this paper we show some convergence in probability and an asymptotic normality based on this index in two classes of random BUCKET recursive trees.

BUCKET recursive trees are an interesting and natural generalization of ordinary recursive trees and have a connection to mathematical chemistry. In this paper, we give the lower and upper bounds for the moment generating function and moments of the multiplicative Zagreb indices in a randomly chosen BUCKET recursive tree of size n with maximal BUCKET size b≥ 1. Also, we consider the ratio of the multiplicative Zagreb indices for different values of n and b. All our results reduce to the ordinary recursive trees for b =1.

In order to investigate the effect of different parameters on dimensions of scour hole Downstream of a flip BUCKET, extensive experiments were conducted. Effect of parameters like: radius of BUCKET, drop height, tail water depth and unit discharge have been investigated. It was observed that dimensions of scour hole is a function of radius of BUCKET, drop height, tail water depth and unit discharge. Dimensionless equations for prediction of scour hole dimensions are introduced.