National Defence University, Pakistan

About: National Defence University, Pakistan is a education organization based out in Islamabad, Pakistan. It is known for research contribution in the topics: Context (language use) & Decision support system. The organization has 802 authors who have published 816 publications receiving 3701 citations. The organization is also known as: National Defence University of Pakistan & National Defence University Islamabad.

Axisymmetric Powell-Eyring fluid flow over a stretching sheet with a convective boundary condition and suction effects

Abstract: In this paper, the heat and mass transfer of an axisymmetric Powell-Eyring fluid flow over a stretching sheet with a convective boundary condition and suction effects are investigated. An appropriate similarity transformation is used to reduce the highly non-linear partial differential equation into second and third order non-linear ordinary differential equations. Numerical solutions of the reduced governing equations are computed numerically by utilizing the MATLAB’s built-in boundary value problem solver, bvp4c. The physical significance of various parameters such as Biot number, fluid parameters and Prandtl number on the velocity and temperature evolution profiles are illustrated graphically. The effects of these governing parameters on the skin friction coefficient and the local Nusselt number are also displayed graphically. It is noticed that the Powell-Eyring fluid parameter gives significant influence on the rates of heat and mass transfer of the fluid.

Studying behavior of the Gradient Signal Processing Algorithm for Adaptive Antenna Arrays in Telecommunication Environment

Abstract: Peculiarities of telecommunication environment are considered and their implications for adaptive antenna array applications in mobile systems are analyzed. Most of the up-to-day research of adaptation methods in antenna arrays has been done on assumption that interfering signals are best described as stationary noise processes with Gaussian probability distribution. While that might be true for radar applications, interfering signals in mobile telecommunications are of the different nature. They are less random and this limited randomness varies depending on the modulation and multiplexing method. Previously, the novel gradient adaptation method developed by the authors was tested and shown to exhibit very promising behavior in only Gaussian noise environment. To assess its suitability for telecommunications, the algorithm was tested in the setting whereby interfering signals are presented as those with the typical mobile modulations, namely BPSK, QPSK and 8PSK. Contrary to the assumption that more regular structure of these signals can lead to some inter-signal correlation with accompanying performance degradation, it is shown that the designed algorithm behaves well and secures required performance expectations. Computer simulation of adaptive antenna arrays based on the algorithm using signals with BPSK, QPSK and 8PSK was carried out. It confirms high performance of the gradient algorithm in those situations and presents it as a good choice for mobile applications.

Investigating the Role of Beliefs and Professional Values in HR Management

Abstract: Human Resource Management has been accentuated as a theme for research in various organizations and institutions and sufficient literature has been introduced on this subject since 1980s in the developed world (Harley and Hardy 2004). This aspect did not attract attention in developing / underdeveloped countries like Pakistan. Presence of literature regarding HRM at the workplace and ideological orientation warrants its application in our organizations/ institutions to help resolve managerial issues being confronted by the managers, employees and the employers. HRM ideology is distinguished by the unitarist and pluralist approach at workplace (Batt and Banerjee 2012).

Power spectrum density (PSD) analysis of automotive pedal-pad

Abstract: Vibration at the pedal-pad may contribute to discomfort of foot plantar fascia during driving. This is due to transmission of vibration to the mount, chassis, pedal, and then to the foot plantar fascia. This experimental study is conducted to determine the estimation of peak value using the power spectral density of the vertical vibration input at the foot. The power spectral density value is calculated based on the frequency range between 13 Hz to 18 Hz. This experiment was conducted using 12 subjects testing on three size of pedal-pads; small, medium and large. The result shows that peak value occurs at resonance frequency of 15 Hz. The PSD values at that resonance frequency are 0.251 (m/s)/Hz for small pedal-pad, followed by the medium pedal-pad is at 0.387 (m/s)/Hz and lastly for the large pedal-pad is at 0.483 (m/s)/Hz. The results indicate that during driving, the foot vibration when interact with the large pedal-pad contributed higher stimulus compared with the small and medium pedal-pad. The pedal-pad size plays an important role in the pedal element designs in terms of vibration-transfer from pedal-pads on the feet, particularly to provide comfort to the driver while driving.

Applying a matrix of key performance indicators in the evaluation of internal control institutions

Abstract: The conducted research can be of interest to the specialists of internal audit, internal control, and heads of all levels who organize the functioning of internal control in subordinate structural units. The article substantiates the use of the Key Performance Indicators (KPI) matrix in assessing the effectiveness of the internal control system of the Ministry of Defense of Ukraine. The research conducted in the article is the result of the practical implementation of the developed complex methodology for evaluating the effectiveness of the internal control system of the Ministry of Defense of Ukraine. In order to accomplish this task, the study carried out its decomposition and separately: conducted an assessment of selected indicators of the effectiveness of the internal control system through appropriate testing and analysis of financial (accounting) reporting; the matrix of key performance indicators is formed; a generalized indicator of the efficiency of the functioning of the internal control system is determined; a proper evaluation of the performance of the internal control system was performed according to the selected criterion.