Basal shoots produced by Arbutus unedo L. after cutting at ground level vary in size and growth rate, and are classified accordingly as dominant or suppressed. The suppressed shoots eventually cease growth and die. In this study, we investigated the role of light and water in the competition among shoots of A. unedo. Dominant and suppressed shoots of A. unedo showed similar leaf water potential...

Klaus Foppa (2003) hat in seinem Aufsatz «Über Lernen» einige grundlegende Überlegungen diskutiert, die in einfachen aber vermutlich auch in komplexen Lernvorgängen relevant sind. Zunächst diskutiere ich im ersten Teil einige dieser Aspekte. Im zweiten Teil werden aus der Perspektive der Entwicklungspsychologie ergänzende Überlegungen im Zusammenhang mit der von Foppa erwähnten Enkulturation an...

In this research, optimization process of axisymmetric extrusion dies is proposed. Plastic zone is analyzed using finite element method in the Eulerian system with flow formulation. The die profiles are defined by Bezier curves with six control points. Two effective functions are considered in this research; standard deviation of the strain rate and the rate of energy consumption during extrusi...

In any metal forming process, both the strain rate and deformation rate depend on the die profile. The die profile also, is responsible for the non-uniformity of the deformation along the cross-section. These affect the quality and mechanical properties of the product. Therefore, if a die is designed, in which the affecting variables can be controlled spontaneously it is hoped to obtain a produ...

The growth of trees and other plants occurs through the interactive combination of photosynthesis and carbon (and other nutrient) assimilation. Photosynthesis enables the production of carbohydrate that can then be used in growing foliage, whereby photosynthesis is enabled. We construct a mathematical model of carbon uptake and storage, which allows the prediction of the growth dynamics of tree...

premenstrual syndrome is a common disorder experienced by up to 50% of women during reproductive age. the prevalence of severe form of pms (pmdd) is 3% to 8 %. psychiatric disorders in pms patients have resulted in significant morbidity and in some cases caused resistance to the treatment process.390 participants (264 with pms/pmdd, and 126 healthy students of university of guilan) who complete...

As part of the multidisciplinary National Fire and Fire Surrogate study, we used drift fences with pitfall traps from May to September 2003 and 2004 to determine how three fuel reduction techniques affected shrews in the Southern Appalachian Mountains of North Carolina. Grounddwelling macroarthropods also were collected from a subset of pitfall traps to assess relative prey availability among t...

The relationship between chronic pelvic pain symptoms and endometriosis is unclear because painful symptoms are frequent in women without this pathology, and because asymptomatic forms of endometriosis exist. Our comprehensive review attempts to clarify the links between the characteristics of lesions and the semiology of chronic pelvic pain symptoms. Based on randomized trials against placebo,...