Naturally, deformed rocks commonly contain crack arrays (joints) forming patterns with systematic relationships to the large-scale deformation. Kinematically, joints can be mode-1, -2 or -3 or combinations of these, but there is no overarching theory for the development of the patterns. We develop a model motivated by dislocation pattern formation in metals. The problem is formulated in one dim...

We extend the mechanism for noise-induced phase transitions proposed by Ibañes et al. [Phys. Rev. Lett. 87, 020601 (2001)] to pattern formation phenomena. In contrast with known mechanisms for pure noise-induced pattern formation, this mechanism is not driven by a short-time instability amplified by collective effects. The phenomenon is analyzed by means of a modulated mean field approximation ...

BACKGROUND There is an extreme need for planning to prevent suicide in developing countries. It is necessary to detect the risk factors of this problem and plan to control them. The aim of this study was to determine a predictive model for suicide attempt based on its risk factors in order to give information for planning therapeutic, preventive, and educational interventions in Karaj City. M...

the prevalence of anemia in elderly with systolic heart failure hospitalized in alborz hospital of karaj 2008 asgharzadeh haghighi s , zeighami mohammadi sh received: 25 april, 2010 accepted: 2march, 2010 abstract background & aims: anemia is prevalent co morbidity in heart failure that is an independent risk factor for adverse clinical outcomes in patients with congestive heart failure. the ai...

We analyze pattern formation in doubly resonant intracavity second-harmonic generation in the presence of competing nondegenerate parametric downconversion. We show that for positive cavity detuning of the fundamental frequency the threshold for parametric oscillation is lower than that of transverse, pattern forming instabilities. The parametric oscillation strongly modifies the pattern dynami...

We investigate the impact of cyclic competition on pattern formation in the rock-paper-scissors game. By separately considering random and prepared initial conditions, we observe a critical influence of the competition rate p on the stability of spiral waves and on the emergence of biodiversity. In particular, while increasing values of p promote biodiversity, they may act detrimentally on spat...