Liu B.,University of Science and Arts of Iran
Neurocomputing | Year: 2015
This paper is concerned with a new generalized neutral type cellular neural network model with continuously distributed leakage delays. Some criteria are established for the existence and global exponential stability of pseudo almost periodic solutions for this model by using the exponential dichotomy theory, contraction mapping fixed point theorem and inequality analysis technique. Moreover, an example and its numerical simulation are employed to illustrate the main results. © 2014 Elsevier B.V.
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.