Quasi-exact Treatment of the Relativistic Generalized Isotonic Oscillator

We investigate the pseudospin symmetry case of a spin-1/2 particle governed by the generalized isotonic oscillator, by presenting quasi exact polynomial solutions to Dirac equation with pseudospin symmetry vector and scalar potentials. The resulting equation is found to be quasi-exactly solvable owing to the existence of a hidden $sl(2)$ algebraic structure. A systematic and closed form solution to the basic equation is obtained using the Bethe ansatz method. Analytic expression for the energy is obtain and the wavefunction is derived in terms of the roots to a set of Bethe ansatz equations

Impact of Digital Revolution on the Structure of Nigerian Banks

The study examined the extent to which digital revolution has affected the organizational structure of Nigerian banks. Twenty-five banks were selected for the study in south-western Nigeria. Interview was conducted for middle and top level managers and questionnaire was developed and administered to the other staff using a five-point Likert scale to determine the attitudes and opinions of the staff on the effects of digital revolution on the organizational structure of the banks. The mean was used as an indicator of central tendency for quantitative variables that have frequency distributions in the study. The study found that standard operating procedures, politics, culture, surrounding environment and management decisions were all affected by digital revolution. It affected the organizational balance of rights, privileges, obligations, responsibilities, and feelings that have been established over a long period of time. The revolution brought structural changes in the line and unit of command, the principles of span of control, unity of command, and scalar principle of graded chain of superiors in the studied banks. It encouraged flat organizations as decision making became more decentralized. It also altered the required skill and increased the perceived advantage of workers with computer engineering background. Authority relied on knowledge and competence and not on mere formal position The study concluded that digital revolution has changed the course of history in the banking industry leaving far reaching effects and implications on both the organizational and industrial structure. It is imperative for banks and their staff to effect proper restructuring that will facilitate optimal utilization of the benefits provided by the revolution.Digital Revolution, ICT, e-Commerce, Organizational Structure, Nigerian Banks

Irreversibility Analysis of a Radiative MHD Poiseuille Flow through Porous Medium with Slip Condition

In this article, irreversibility analysis of thermal radiation with slip condition on MHD Poiseuille flow through porous medium is investigated. The upper and lower walls are kept constant with the same temperature. The radiative heat flux in the energy equation is assumed to follow Roseland approximation. Semi-analytical solutions of the non-linear boundary value problems obtained from the governing equations is constructed using Adomian decomposition method, and the effects of some fluid parameters on fluid motion, temperature, entropy generation and Bejan number are presented

Hall Current and Joule Heating Effects on Flow of Couple Stress Fluid with Entropy Generation

In this work, an analytical study of the effects of Hall current and Joule heating on the entropy generation rate of couple stress fluid is performed. It is assumed that the applied pressure gradient induces fluid motion. At constant velocity, hot fluid is injected at the lower wall and sucked off at the upper wall. The obtained equations governing the flow are transformed to dimensionless form and the resulting nonlinear coupled boundary value problems for velocity and temperature profiles are solved by Adomian decomposition method. Analytical expressions for fluid velocity and temperature are used to obtain the entropy generation and the irreversibility ratio. The effects of Hall current, Joule heating, suction/injection and magnetic field parameters are presented and discussed through graphs. It is found that Hall current enhances both primary and secondary velocities and entropy generation. It is also interesting that Joule heating raises fluid temperature and encourages entropy production. On the other hand Hartman number inhibits fluid motion while increase in suction/injection parameter leads to a shift in flow symmetry