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Non-Relativistic Phase Shifts for Scattering on Generalized Radial Yukawa Potentials

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Communications in Theoretical Physics 2016年第4期65卷 434-440页

作者： O.j.Oluwadare k.E.Thylwe k.j.oyewumi Department of Physics Federal University Oye-Ekiti kTH-Mechanics Royal institute of Technology Theoretical Physics Section Department of PhysicsUniversity of Ilorin

Non-relativistic phase shifts for a generalized Yukawa potential V(r) =-V_0( e^(-αr)/r)-V_1( e^(-2αr)/r^2) are studied by the amplitude-phase method and by a frequently used analytic method based on a Pekeris-type approximation of power-law potential *** variations of V_1 seem to have marginal effects on the effective potential and on exact phase ***,as pointed out in this study,a Pekeris-type approximation in scattering applications often implies serious distortions of both effective potentials and phase *** Pekeris-type based analytic approximation in this study seems to give low-quality scattering results for this model potential at low energies.

关键词： quantum mechanics scattering partial waves resonances

Semi-Relativistic Reflection and Transmission Coefficients for Two Spinless Particles Separated by a Rectangular-Shaped Potential Barrier

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Communications in Theoretical Physics 2016年第10期65卷 389-395页

作者： k.E.Thylwe O.j.Oluwadare k.j.oyewumi kTH-Mechanics Royal institute of Technology Department of Physics Federal University Oye-Ekiti Theoretical Physics Section Department of PhysicsUniversity of Ilorin

A generalized Schr¨odinger approximation,due to Ikhdair & Sever,of the semi-relativistic two-body problem with a rectangular barrier in(1+1) dimensions is compared with exact *** and approximate transmission and reflection coefficients are obtained in terms of local wave *** approximate transmission and reflection coefficients turn out to be surprisingly accurate in an energy range |∈-V0| < 2μc^2,where μ is the reduced mass,∈ the scattering energy,and V_0 the barrier top *** approximate wave numbers are less accurate.

关键词： two-body relativistic equation rectangular barrier transmission 1+1D relativistic scattering semi-relativistic approximation spinless Salpeter equation

Availability of basic life support courses for the general populations in India, Nigeria and the United kingdom: An internet-based analysis

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World journal of Emergency Medicine 2020年第3期11卷 133-139页

作者： Alexei Birkun Fatima Trunkwala Adhish Gautam Miriam Okoroanyanwu Adesokan oyewumi Department of Anaesthesiology Resuscitation and Emergency MedicineMedical Academy named after S.I.Georgievsky of V.I.Vernadsky Crimean Federal University295051Lenin Blvd5/7SimferopolRussian Federation

BACkGROUND:The number of lay people willing to attempt cardiopulmonary resuscitation(CPR)in real life is increased by effective education in basic life support(BLS).However,little is known about access of general public to BLS training across the *** study aimed to investigate availability and key features of BLS courses proposed for lay people in India,Nigeria and the United kingdom(Uk).METHODS:A Google search was done in December 2018,using English keywords relevant for community resuscitation *** courses addressing BLS and suitable for any adult layperson were included in the ***-site training courses were limited to those provided within the country's ***:A total of 53,29 and 208 eligible courses were found for India,Nigeria and the Uk,*** the Uk,the number of courses per 10 million population(31.5)is 79 and 21 times higher than that in India(0.4)and Nigeria(1.5).Course geography is limited to 28%states and one union territory in India,30%states and the Federal Capital Territory in *** the Uk,the training is offered in all constituent countries,with the highest prevalence in *** are predominantly classroom-based,highly variable in duration,group size and instructors'*** India and Nigeria,mean cost of participation is exceeding the monthly minimum ***:In contrast to the Uk,the availability and accessibility of BLS courses are critically limited in India and Nigeria,necessitating immediate interventions to optimize community CPR training and improve bystander CPR rates.

关键词： Basic life support Cardiopulmonary resuscitation Courses Training India Nigeria United kingdom