this paper presents a new arc starter circuit that is usable in manual metal arc welding (mma) power supplies. the proposed circuit uses an auxiliary circuit and a series coupling transformer for adding high frequency spikes to output dc voltage during arc striking. the proposed circuit is usable in inverter based arc welding supplies and it could result in a decrease of weigh, volume and expen...

introduction : arsenic trioxide (as2o3) causes antitumor effects by various mechanisms, including degradation of pml-rara in the acute promyelocytic cells, growth inhibition and induction of apoptosis. however, the precise mechanisms of these processes remain incompletely understood. the purpose of this study was to evaluate the effects of arsenic trioxide on cell growth, cell cycle regulation ...

we give a new recursive method to compute the number of cliques and cycles of a graph. this method is related, respectively to the number of disjoint cliques in the complement graph and to the sum of permanent function over all principal minors of the adjacency matrix of the graph. in particular, let $g$ be a graph and let $overline {g}$ be its complement, then given the chromatic polynomial of...

we present a matching and lp based heuristic algorithm that decides graph non-hamiltonicity. each of the n! hamilton cycles in a complete directed graph on n + 1 vertices corresponds with each of the n! n-permutation matrices p, such that pu,i = 1 if and only if the ith arc in a cycle enters vertex u, starting and ending at vertex n + 1. a graph instance (g) is initially coded as exclusion set ...

let g be a (p, q) graph. let k be an integer with 2 ≤ k ≤ p and f from v (g) to the set {1, 2, . . . , k} be a map. for each edge uv, assign the label |f(u) − f(v)|. the function f is called a k-difference cordial labeling of g if |νf (i) − vf (j)| ≤ 1 and |ef (0) − ef (1)| ≤ 1 where vf (x) denotes the number of vertices labelled with x (x ∈ {1, 2 . . . , k}), ef (1) and ef (0) respectively den...

1 A.-R. M. Zaghloul, Georgia Institute of Technology, College of Engineering, GTREP and School of ECE, Orleans Building, Chatham Center Dr., Savannah, GA 31405 [email protected] 2 Ashraf Saad, Georgia Institute of Technology, College of Engineering, GTREP and School of ECE, Orleans Building, Chatham Center Dr., Savannah, GA 31405 [email protected] Abstract  We propose a u...

Dear friend. You are almost ready to close this volume and put it on a shelf or return it to the College Bookstore, or... Please do not hurry to make your final decision. I hope that this volume was your partner during a semester of challenging Physics. It was designed to help you make your notes during the lectures, which I hope you enjoyed very much. I am sure that this book helped you a grea...

Aiming at the characteristics of high dimension and small samples in microarray data, this paper proposes a selective ensemble method to classify microarray data. Firstly, kruskal-wallis test is used to filter irrelevant genes with classification task and to obtain a set of genes, and then a reduced training set is produced from original training set according to gene subset obtained. Secondly,...

We intend to carry out this work, to contribute for an increased knowledge about the history of science and chestnut as well as identifying the contribution of Amato Lusitano in therapeutic use of Chestnut. The chestnut has been around for thousands of years helping the man since the Paleolithic. This species was introduced in Europe during the Roman era, due to its potential, representing in o...