In this paper Mathematical structure of time-dependent Lagrangian systems and their symmetries are extended and the explicit relation between constants of motion and infinitesimal symmetries of time-dependent Lagrangian systems are considered. Starting point is time-independent Lagrangian systems ,then we extend mathematical concepts of these systems such as equivalent lagrangian systems to th...

universitt a di genova facoltt a di ingegneria dipartimento informatica sistemistica telematica Abstract We discuss the persistence of the indirect effects of an action|the question when such effects are subject to the commonsense law of inertia , and how to describe their evolution in the cases when inertia does not apply. Our model of nonpersistent eeects involves the assumption that the valu...

Introduction: The relation between morphine and nitric oxide release has been shown. Due to important role of nitric oxide in regulation of skin blood flow, the aim of this study was to investigate the effect of nitric oxide synthase inhibitor (L-NAME) and nitric oxide synthesis precursor (L-arginine) on skin blood flow of intact and morphine-dependent rats. Methods: Skin blood flow of hind pa...

introduction : drug addiction and drug dependency are major problem in the “mental”,”social”, and “health-care” fields. it decreases occupational performance and educational abilities in different social groups, and may lead to miscellaneous crimes. different methods are recommended for drug addiction treatments. detoxification is the first step however it would not be successful without follow...

background: the classical supportive therapy for î² -thalassemia major consists of regular blood transfusion, iron-chelation therapy and specific treatment of the related complications. a balance between the maintenance of the highest possible level of haemoglobin and lowest possible level of iron accumulation in heart and liver give the best chance of survival and the best quality of life. met...