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Nilüfer, Turkey

Raza S.,CAS Institute of Theoretical Physics | Raza S.,University of Delaware | Shafi Q.,University of Delaware | Un C.S.,University of Delaware | Un C.S.,Uluda University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2015

We present a study of the b-τ Yukawa unified supersymmetric SU(4)c×SU(2)L×SU(2)R model (with μ>0), which predicts the existence of gluino - neutralino and stop - neutralino coannihilation scenarios compatible with the desired relic lightest supersymmetric particle neutralino dark matter abundance and other collider constraints. The next to lightest supersymmetric particle (NLSP) gluino or NLSP stop masses vary between 400 GeV and ∼1TeV. The NLSP gluinos will be accessible at the 14 TeV LHC, while we hope that the NSLP stop solutions will be probed in future LHC searches. We also identify regions of the parameter space in which the gluino and the lighter stop are closely degenerate in mass, interchangeably playing the role of NLSP and next to next to lightest supersymmetric particle (NNLSP). We also update a previous study of t-b-τ Yukawa unification and show that NLSP gluino of mass ∼1TeV, with a mass difference between the gluino and neutralino of less than 80 GeV, can be realized, consistent with the current collider and astrophysical constraints. We present benchmark points for b-τ and t-b-τ Yukawa unification that can be accessible at the LHC. © 2015 American Physical Society. © 2015 American Physical Society.

Inkaya T.,Uluda University
Expert Systems with Applications | Year: 2014

In this paper we propose a novel neighborhood classifier, Surrounding Influence Region (SIR) decision rule. Traditional Nearest Neighbor (NN) classifier is a distance-based method, and it classifies a sample using a predefined number of neighbors. In this study neighbors of a sample are determined using not only the distance, but also the connectivity and density information. One of the well-known proximity graphs, Gabriel Graph, is used for this purpose. The neighborhood is unique for each sample. SIR decision rule is a parameter-free approach. Our experiments with artificial and real data sets show that the performance of the SIR decision rule is superior to the k-NN and Gabriel Graph neighbor (GGN) classifiers in most of the data sets. © 2014 Elsevier Ltd. All rights reserved.

A series of novel cationic surfactants bearing 1,3,4-oxadiazole and tetraazatricyclic ring structures were synthesized by alkyl chain elongation of 5-{10-[4-(hydroxymethyl)phenoxy]decyl}-2,3-dihydro-1,3,4-oxadiazole-2-thione with homologous series of alkyl bromides, followed by chlorination of the corresponding benzyl alcohols with thionyl chloride and quaternization of the obtained intermediates with hexamethylenetetramine. © 2014 HeteroCorporation.

Convenient procedure for in situ cyclization of hydrazinecarbodithioate potassium salts to 1,3,4-oxadiazole-2(3H)-thiones under normal phase micellar media catalysis promoted by sodium dodecyl sulfate (SDS) as an anionic surfactant is reported. The main advantage of this procedure is to provide shorter reaction time for the completion of cyclization; scale-up synthesis is possible and the oxadiazoles were obtained in high to excellent yields (87-100%), making the protocol an attractive alternative to the available methods.

Kocamaz U.E.,Uluda University | Kizmaz H.,Sakarya University
International Journal of Adaptive Control and Signal Processing | Year: 2014

This paper investigates the control of the continuous time Rabinovich chaotic system with the sliding mode control method. Based on the properties of the sliding mode theory, the controllers are designed and added to the nonlinear Rabinovich system. Numerical simulations show that the Rabinovich chaotic system can be regulated to its equilibrium points in the state space by using the sliding mode controllers, which verifies all the theoretical analyses. Simulation results of the proposed sliding mode control strategy have been also compared with the passive control method, and their performances are discussed. Copyright © 2013 John Wiley & Sons, Ltd.

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