A Study of Scattering Proton by Zirconium Between 50MeV and 65MeV

The experimental data of the scattering proton has been analysis by using one of the methods for optical dispersion model which depending on the afferent between the real and imaginary parts and this led to a derivation decrease in determining the optical parameters from the experimental data. Also on the stripe expending of the real potential parameters from high energy to low energy to the close area of the Coulomb barrier which characterized the lack of information about the experimental data for each, using the program SPI-GINOA in order to determine the value of the volume integral for the real and imaginary parts (surface and volume) for the interaction (  ) in the of energy ( ). Which resulted in the perfect value of integrals for the real and imaginary parts (surface – volume) and has obtained by comparing them with experimental data in the references .The Value of the volume integral for the real part and integrals oh "Hartree – Fock" was pointed and then determined the value of real part of the potential Hartree – fock potential. In addition we also has been determined the imaginary potential  (two parts the surface and the volume) and studied on function of energy for all the specific pointed ingredients.The potential dispersion was determined (surface – volume) and studied their functional energy. Therefore, we determined the radius proton optical model and also we found its energy way match close to what reveal the correctness of method of dispersive optical model at one hand, and the accuracy in the determination of optical model parameters at other hand. Keywords: SPI-GINOA, imaginary potential, functional energ

Study of the Scattering alpha Projectiles

The Method of Variational Moment Approach (VMA) depends on the relation that connects the real and imaginary parts of the optical model potential, known as the causality-based dispersion relation, where the Causality Principle sets forth that a scattered wave cannot be transmitted before the arrival of the incident wave. In this Study, an attempt is made to extend the application of the VMA Method, which dealt with simple systems, such as the proton- nucleus system and the neutron-nucleus system, in order to study the dispersion of complex systems such as the nucleus-nucleus system at a low range of energy

Sharing Economy: A Business Perspective

The developments in information technology on the one hand, and the reduced purchasing power of many people due to the global crisis as well as the increasing sustainability concerns on the other hand, have contributed in recent years to the creation of a multitude of Internet-enabled peer-to-peer platforms and the consequent rise of a new paradigm of economy, namely the sharing economy. Under this paradigm, consumers on a massive scale share and make use of underutilized resources upon payment. In this chapter, we present an overview of the sharing economy phenomenon from a business perspective by identifying the major factors guiding its emergence and growth, by presenting some important business principles that characterize the sharing economy and a classification of business models utilized in this context, together with the major revenue streams associated with them. Our general overview can be useful to researchers and practitioners to gain initial understanding of the sharing economy, its causes and effects from a business perspective

L'etude des mycorhizes du palmier a huile Rapport detaille des recherches effectuees dans le cadre de l'ATP MICAM 1986/87

En collaboration avec l'IRHO Station Robert Michaux, Division Pathologie, Dabou (Cote d'Ivoire)SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : AR 15113 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc