University of Science and Arts of Iran

Yazd, Iran

University of Science and Arts of Iran

Yazd, Iran
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A new code construction algorithm for Spectral Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) is proposed to reduce multiple access interference (MAI) and mitigate the influence of Phase Induced Intensity Noise (PIIN) arising in photodetecting process effectively. The new family of code called Generalized Matrix Partitioning Code (GMPC) has many advantages such as simplicity in code construction using the concept of the sequence of numbers, no upper and lower bounds restrictions and it is valid for all natural numbers. The performance analysis shows that the proposed GMP code family can suppress phase induced intensity noise effectively and improve the system performance significantly. © 2016 Elsevier GmbH

Baykal A.,University of Science and Arts of Iran
Classical and Quantum Gravity | Year: 2015

By using the algebra of exterior forms and the first order formalism with constraints, an alternative derivation of the field equations for the minimal massive 3D gravity model is presented. © 2015 IOP Publishing Ltd.

Peng G.,University of Science and Arts of Iran
Nonlinear Dynamics | Year: 2013

In this paper, a new lattice model of the traffic flow is proposed with the consideration of the driver anticipation effect for a two-lane system. The linear stability condition is derived by employing linear stability analysis. The analytical result shows that the driver anticipation effect can improve the stability of the traffic flow in a two-lane system. The mKdV equation near the critical point is obtained to describe the propagating behavior of a traffic density wave with the perturbation method. The simulation results are also in good agreement with the analytical results, which show that the traffic jam can be suppressed efficiently when the driver anticipation effect is considered in a two-lane system. © 2013 Springer Science+Business Media Dordrecht.

Kim S.-Y.,University of Science and Arts of Iran
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2010

The distributions of the partition function zeros in the complex a= e2β J1 plane of the square-lattice Ising model with nearest-neighbor (J1) and next-nearest-neighbor (J2) interactions are investigated as a function of R= J2 / J1. Starting from the well-known two-circle distribution of the zeros a=±1+√2 eiθ for R=0, finally the partition function zeros lie on the unit circle a= eiθ for R=∞. Between these two ends, the changes in the zero distributions are described. Using the partition function zeros, the critical point ac (R) and the thermal scaling exponent yt (R) are estimated for the Ising ferromagnet (equivalently, antiferromagnet) and superantiferromagnet. For the special case of R= 1 2, the possible implications of the zero distributions are also discussed. © 2010 The American Physical Society.

Kim S.-Y.,University of Science and Arts of Iran
Journal of Chemical Physics | Year: 2010

We apply a global optimization method, which is conformational space annealing (CSA) to a challenging problem of the 69-residue protein with the sequence B9 N3 (LB) 4 N3 B 9 N3 (LB) 4 N3 B9 N 3 (LB) 5 L, where B, L, and N designate hydrophobic, hydrophilic, and neutral residues, respectively. The 69-residue BLN protein folds into a six-stranded β -barrel structure. The CSA method always maintains the diversity of sampling and is able to cross the high energy barriers between local minima. The CSA successfully located the global minimum of the 69-residue BLN protein for all 100 independent runs. For a single run, it takes about 3 h and 30 min on average to obtain the global minimum on a Linux PC. Also, we investigate the properties of the 69-residue BLN protein, and the general behavior of the M -residue BLN protein for CSA runs. © 2010 American Institute of Physics.

Ottinger G.,University of Science and Arts of Iran
Science Technology and Human Values | Year: 2013

Procedural justice, or the ability of people affected by decisions to participate in making them, is widely recognized as an important aspect of environmental justice (EJ). Procedural justice, moreover, requires that affected people have a substantial understanding of the hazards that a particular decision would impose. While EJ scholars and activists point out a number of obstacles to ensuring substantial understanding-including industry's nondisclosure of relevant information and technocratic problem framings-this article shows how key insights from Science and Technology Studies (STS) about the nature of knowledge pose even more fundamental challenges for procedural justice. In particular, the knowledge necessary to inform participation in decision making is likely not to exist at the time of decision making, undermining the potential for people to give their informed consent to being exposed to an environmental hazard. In addition, much of the local knowledge important to understanding the consequences of hazards will develop only after decisions have been made, and technoscientific knowledge of environmental effects will inevitably change over the period during which people will be affected by a hazard. The changing landscape of knowledge calls into question the idea that consent or participation during one decision-making process can by itself constitute procedural justice. An STS-informed understanding of the nature of knowledge, this article argues, implies that procedural justice should include proactive knowledge production to fill in knowledge gaps, and ongoing opportunities for communities to consent to the presence of hazards as local knowledge emerges and scientific knowledge changes. © The Author(s) 2012.

Candan M.,University of Science and Arts of Iran
Acta Mathematica Scientia | Year: 2014

The class f of almost convergent sequences was introduced by G.G. Lorentz, using the idea of the Banach limits [A contribution to the theory of divergent sequences, Acta Math. 80(1948), 167-190]. Let f0() and f() be the domain of the double sequential band matrix () in the sequence spaces f0 and f. In this article, the β. and γ-duals of the space f() are determined. Additionally, we give some inclusion theorems concerning with the spaces f0() and f(). Moreover, the classes (f() : μ) and (μ : f()) of infinite matrices are characterized, and the characterizations of some other classes are also given as an application of those main results, where μ is an arbitrary sequence space. © 2014 Wuhan Institute of Physics and Mathematics.

Rucevic S.,University of Science and Arts of Iran
Law and Human Behavior | Year: 2010

The current study investigated the association of psychopathic traits with violent and non-violent delinquency, delinquency versatility, and risky sexual behavior in Croatian sample of non-referred boys (n = 226) and girls (n = 480). Psychopathic traits were measured by the self-report Youth Psychopathic Traits Inventory (YPI). Consistent with the study's hypotheses, Impulsive-Irresponsible and Callous-Unemotional dimensions were most consistently associated with all outcome measures. Results of the regression analyses showed that the Impulsive-Irresponsible behavioral style had stronger association with non-violent delinquency and delinquency versatility for boys. However, the Impulsive-Irresponsible dimension had stronger influence on risky sexual behavior for girls compared with boys. The results of a two-group confirmatory factor analysis revealed that the three-factor model of the YPI was invariant across gender. © 2009 American Psychology-Law Society/Division 41 of the American Psychological Association.

Zhang H.,University of Science and Arts of Iran
Neural Computing and Applications | Year: 2014

In this paper, a class of nonlinear nonautonomous cellular neural networks system with the introduction of continuously distributed delays in the leakage (or forgetting) terms is considered. By using Lyapunov functional method and differential inequality techniques, without assuming the boundedness on the activation functions, we derive a set of easily verifiable sufficient conditions that guarantee the existence and exponential stability of almost periodic solutions for the system. Moreover, an example and its numerical simulation are given to demonstrate the feasibility of our method. © 2013 Springer-Verlag London.

Liu B.,University of Science and Arts of Iran
Nonlinear Analysis: Real World Applications | Year: 2010

This paper is concerned with a class of the generalized Nicholson's blowflies model with patch structure and multiple time-varying delays, which is defined on the nonnegative function space. Under proper conditions, we employ a novel proof to establish some criteria of the global stability of positive equilibrium for this model. Moreover, we give an example to illustrate our main result. © 2009 Elsevier Ltd. All rights reserved.

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