Italian ryegrass (Lolium multiflorum L.) is a highly competitive weed widely disseminated worldwide that affects both summer and winter crops. The development of predictive emergence models can contribute to optimizing management. aim this study was develop validate an empirical model based on soil thermal time. For development, cumulative in two locations obtained, the validated with data coll...

In many product categories, technological evolution results in the emergence of a single product design that achieves market dominance. In this article, the authors examine two questions: Will a dominant design emerge in a new product category? and If it does, how long will it be before a dominant design emerges? Thus, the authors simultaneously model the probability of emergence of a dominant ...

in order to evaluation of seed production index in lambsquarters (chenopodium album), leaf appearance and yield of fennel (foeniculum vulgare) under inter-specific competition a factorial experiment was conducted in islamic azad university, tabriz branch, iran, during 2011-2012. treatments were weed densities of 0, 2, 4, 6 and 8 plants per meter row and its relative emergence times of simultane...

We propose an unconditional non-parametric approach to the simultaneous estimation of volatility and expected return. By means of a detailed analysis of the returns of the Standard & Poors 500 (S&P 500) composite stock index over the last fifty years we show how theoretical results and methodological recommendations from the statistical theory of non-parametric curve inference allow one to cons...