Simulation plays an important r^ ole in stochastic geometry and related elds, because all but the simplest random set models tend to be intractable to analysis. Many simulation algorithms deliver (approximate) samples of such random set models, for example by simulating the equilibrium distribution of a Markov chain such as a spatial birth-and-death process. The samples usually fail to be exact...

Policy makers in the United States often justify agricultural subsidies by stressing that agriculture is the engine of the rural economy. We use the increase in crop prices in the late 2000s to estimate the marginal effect of increased agricultural revenues on local economies in the U.S. Heartland. We find that $1 more in crop revenue generated 64¢ in personal income, with most going to farm pr...

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Teachers’ Professional Competencies: Past, Present, and Future   M. Rezaai, Ph.D.*   The purpose of this paper is to review the expected professional competencies throughout the history of teacher training in Iran. As such it covers both the past, covering the period from teacher training inception in 1918 to the Islamic revolution in 1979; and the present, since the revolution. Of course t...

  Introduction : Rabies is a disease that has been known since antiquity. It is a highly fatal acute disease of the central nervous system caused by a lyssavirus. Prior to the discovery of the rabies vaccine, rabies-infected individuals fell victim to the delusions and superstitions associated with this disease. Though it has been neglected in many regions of the world, rabies remains one ...

background tuberculosis (tb) is the second-most common cause of death from infectious disease (after those due to hiv/aids). roughly one-third of the world's population has been infected with m. tuberculosis, with new infections occurring in about 1% of the population each year. people with active tb can infect 10-15 other people through close contact over the course of a year. materials a...