We study the control of modulational instability and pattern formation in a nonlinear dissipative feedback system with a periodic modulation of the material refractive index. We use a one-dimensional photonic lattice in a single-mirror feedback configuration and identify three mechanisms for pattern control: bandgap suppression of instability modes, periodicity induced pattern modes, and orient...

We present some numerical results obtained from a simple individual-based model that describes clustering of organisms caused by competition. Our aim is to show that, even when a deterministic description developed for continuum models predicts no pattern formation, an individual-based model displays well-defined patterns, as a consequence of fluctuation effects caused by the discrete nature of...

many constants and coefficient effect on the modeling results. in many cases, it is possible these constants and coefficients differ from their real values in the environment, but the modeling results adapted with real boundary conditions due to other factors adjustment during modeling. uncertainty analysis is a tool for assessing the effect of uncertainty of various factors on the modeling res...

Background: the appropriate organizational climate and subsequent proper performance are goals that challenge hospital managers to achieve successful outcomes. A positive working motivates enhances nurses' performance. Objectives: There was identify relationship between perceived Methods: This is a cross-sectional descriptive study performed on nurses in private hospitals Rasht, Iran. The data ...

Isolated renal hydatid disease is a rare endemic infestation caused by larval form of Echinococcus granulosus. Hydatiduria is an uncommon presentation of renal hydatid disease. In 2012 a 34-year-old female referred to Razi Hospital, Rasht, Iran with complaints of right flank pain and grape-like material in urine. Diagnosis was made by ultrasonography and CT scan. The patient was treated surgica...

Monte Carlo Algorithms for Solving Fredholm Integral Equations and Fredholm Differential Integral Equations Behrouz Fathi Vajargah and Mojtaba Moradi Department of Mathematics Guilan University, Rasht, Iran [email protected], [email protected] Abstract In this paper we establish a new algorithm for solving non linear differential integral equations based on Monte Carlo methods. For obta...

INTRODUCTION Patients' satisfaction (PS) is one of the important indicators of emergency care quality and outcomes of health care services. Some researchers believe that improve the work processes and hospital quality are not possible without caring to comments, requirements, expectations, and satisfaction of patients. The percent study was aimed to assess the emergency department (ED) PS of Po...

Background: Oral lesions can affect people’s quality of life by interfering with chewing, swallowing, and speech. These may originate from epithelial or mesenchymal tissues. Malignant oral be life-threatening. Epidemiological data in Iran is limited. Objective: This study aims to investigate the frequency Rasht, Iran. Methods: In this cross-sectional study, histopathologic reported Razi laborat...

introduction: nowadays, despite socio-economic development of communities and controlling majority of communicable diseases, tuberculosis is still one of the main causes of mortality and disability in developing countries. with respect to importance and high incidence of tuberculosis in marginal provinces, the present study aimed to assess the epidemiology of tuberculosis in khuzestan province ...