this research was carried out to evaluate the effects of some morphophysiological traits on white sugar yield of 10 commercial sugar beet (beta vulgaris l.) varieties. all experiments were conducted in four important sugar beet growing areas in iran, i.e. moghan, khoy, karaj and zarghan in 2006 and 2007. the experiment was arranged as a randomized complete block design with three replications i...

In this work, we build on a previous real options approach that utilizes managerial cash-flow estimates to value early stage project investments. Through a simplifying assumption, where we assume that the managerial cash-flow estimates are normally distributed, we derive a closedform solution to the real option problem. The model is developed through the introduction of a market sector indicato...

Binary black hole spacetimes with a helical Killing vector, which are discussed as an approximation for the early stage of a binary system, are studied in a projection formalism. In this setting the four dimensional Einstein equations are equivalent to a three dimensional gravitational theory with a SL(2, C)/SO(1, 1) sigma model as the material source. The sigma model is determined by a complex...

The timing of maturation in insects is determined by reaching a critical developmental stage, at which development becomes committed to metamorphosis (e.g. Nijhout, 1981). The critical stage is a well-de®ned developmental stage, marked by a small ecdysone pulse (Berreur et al., 1979). It leads to a shift in hormonal levels, which sets the stage for further developmental changes (Riddiford, 1993...

increasing competitiveness between software companies , that stems from customer needs and new information technologies, obliges the companies to improve their products’ quality according to high speed and low cost. this research seeks to introduce and determine the software production assembly line, one of the software development approaches. a three stage questionnaire was used to collect inf...