Persistence in One-dimensional Ising Models with Parallel Dynamics

We study persistence in one-dimensional ferromagnetic and anti-ferromagnetic nearest-neighbor Ising models with parallel dynamics. The probability P(t) that a given spin has not flipped up to time t, when the system evolves from an initial random configuration, decays as P(t) \sim 1/t^theta_p with theta_p \simeq 0.75 numerically. A mapping to the dynamics of two decoupled A+A \to 0 models yields theta_p = 3/4 exactly. A finite size scaling analysis clarifies the nature of dynamical scaling in the distribution of persistent sites obtained under this dynamics.Comment: 5 pages Latex file, 3 postscript figures, to appear in Phys Rev.

Opinion dynamics model with domain size dependent dynamics: novel features and new universality class

A model for opinion dynamics (Model I) has been recently introduced in which the binary opinions of the individuals are determined according to the size of their neighboring domains (population having the same opinion). The coarsening dynamics of the equivalent Ising model shows power law behavior and has been found to belong to a new universality class with the dynamic exponent $z=1.0 \pm 0.01$ and persistence exponent $\theta \simeq 0.235$ in one dimension. The critical behavior has been found to be robust for a large variety of annealed disorder that has been studied. Further, by mapping Model I to a system of random walkers in one dimension with a tendency to walk towards their nearest neighbour with probability $\epsilon$, we find that for any $\epsilon > 0.5$, the Model I dynamical behaviour is prevalent at long times.Comment: 12 pages, 10 figures. To be published in "Journal of Physics : Conference Series" (2011

Curvularia linata as bioherbicide for management of Xanthium strumarium L., an abnoxious weed - A Critical Evualation

Xanthium strumarium L. is an exotic plant responsible for several agricultural, environmental and health problems in India. Due to non-acceptability of conventional methods of control, the possibilities of its management through an indigenous strain of Curvularia lunata had been explored. In the present study, the organism was recovered in pure culture from the infected/infested parts of the weed, seedling and detached leaf bioassays were employed to evaluate the effect of different epidemiological factors on efficacy of mycoherbicidal agent. Significant effect on herbicidal potential of C. lunata was recorded when subjected to different conditions. Maximum efficacy of the pathogen was observed at 30°C, 80% RH, 2-3 leaves stage when sprayed @ of 4.5 x 105 Sp. /ml. The present study experimentally emphasizes on the development of Curvularia lunata as a mycoherbicide in the management of the weed, Xanthium strumarium L

Mapping the Indian Contribution in Pathogen Research during 2008-2017: A Scientometric Analysis

The present study mainly examines the growth rate of publications in the field of Pathogen research in India during the period of 2008-2017. The study based on Scopus databases and using scientometric tools. It reveals that a total 13070 of publications were published from the marked period of study. our analysis includes the year wise publications output, annual growth rate, compound annual growth rate, relative growth rate and doubling time, most productive authors, documents wise distribution of publications etc., and found that the maximum 1925 (14.73%) of research papers were published in the year 2016, followed by 1896 (14.51%) of publication in 2017. The maximum 36.541 annual growth rate was recorded in the year 2011, and 0.1189 CAGR was recorded in the year 2009. The maximum RGR 0.82 was recorded in the year 2009, and the highest doubling time 4.414 was recorded in the year 2017. The highest 69 publications were contributed by Dhama, K. and the maximum 10909 documents were ‘Article’ type

COMMON RANDOM FIXED POINT RESULT IN SYMETRIC SPACE

Under random iteration scheme we study necessary conditions for convergence to a common fixed point of two pair of JSR random operators satisfying generalized contractive condition in the framework of  symmetric spaces.   Mathematical Subject Classification(2000):  54H25,47H10 Keywords: Symmetric space, JSR random operator, common fixed point

SC-FDM-IDMA Scheme Employing BCH Coding

In OFDM-IDMA scheme, intersymbol interference (ISI) is resolved by the OFDM layer and multiple access interference (MAI) is suppressed by the IDMA layer at low cost . However OFDM-IDMA scheme suffers high peak-to-average power ratio (PAPR) problem. For removing high PAPR problem a hybrid multiple access scheme SC-FDM-IDMA has been proposed. In this paper, bit error rate (BER) performance comparison of SC-FDM-IDMA scheme, OFDM-IDMA scheme and IDMA scheme have been duly presented.  Moreover, the BER performance of various subcarrier mapping methods for SC-FDM-IDMA scheme as well as other results with variation of different parameters have also been demonstrated. Finally simulation result for BER performance improvement has been shown employing BCH code. All the simulation results demonstrate the suitability of SC-FDM-IDMA scheme for wireless communication under AWGN channel environment

The Task Allocation Model In Communication Channel Delay

In this paper a heuristics approach for task allocation in a distributed computing system has been discussed. This performs static allocation and provide near optimal results. The suggested algorithm is coded in Mat Lab and implemented on a Dual Core machine and found the performance of the developed algorithm is satisfactory

Fixed Point Results In Fuzzy Menger Space With Rational Expression

This paper presents some common fixed point theorems for occasionally weakly compatible mappings with rational expression in Fuzzy menger metric spaces. Keywords: Occasionally weakly compatible mappings, Fuzzy menger metric space,Weak compatible mapping, Semi-compatible mapping, Implicit function, common fixed point. Subject Classification: AMS (2000) 47H2