Showing papers by "Jawad Hussain published in 2014"

Comparing Results between the Repeated Load Triaxial Test and Accelerated Pavement Test on Unbound Aggregate

Abstract: Unbound granular materials (UGM) are extensively used as basecourse materials around the world as they are capable of bearing relatively high traffic loads and are an economical option in comparison to bound materials. The unbound materials performance as basecourse determines the life-cycle costs of a pavement. The extent to which the repeated load triaxial test can predict the performance of unbound granular materials in the laboratory is an important parameter for road designers. Moreover, the performance of the unbound basecourse materials depends upon the moisture conditions when they are being loaded, gradation curve of the material, in situ density, permeability, and the nature of the aggregate fines (clays). There is a need to find the factors that cause the variation in the performance of the materials both in the laboratory and in-field pavement conditions to enable appropriate selection and use. This research utilizes accelerated pavement tests (APT) alongside repeated load triaxial (RL...

The effect of moisture and relative proportions of clay minerals (smectite, chlorite and illite) on the performance of unbound granular base course (UGM)

Abstract: An increase in moisture accelerates the deterioration of a pavement and this is especially so for unbound granular materials below the pavement surface One of the possible reasons for this accelerated deterioration can be the mineralogical makeup of the aggregates, which can include clays This research paper discusses the effect of the relative proportions of clay minerals on the performance of different base course materials in repeated load triaxial (RLT) tests considering moisture variation The materials selected for this study were sourced from greywacke sedimentary rocks from both the North and South Islands of New Zealand The mineralogical makeup of the clay content present in the base course materials was determined by X-ray powder diffraction (XRD) The performance of these materials was further tested in RLT tests at different moisture and drainage conditions The results of the XRD and RLT tests showed that aggregates with high relative proportions of smectite clay minerals can decrease the load-bearing capacity of the base course material when moisture is introduced into the pavement materials

Employees' perception and motivation towards training and development programmes in health sector of pakistan: a case study of Khyber pakhtun khwa

Abstract: Training is the one of the most important function of human resource in any organization. It increases the efficiency and the effectiveness of both employees and the organization. The focus of this research paper is to know about the training and development programs in the health sector of Pakistan. And also to evaluate the employees’ motivation and perception about these training and development programs. The researchers have used Khyber Pakhtunkhwa (KPK) province as a case for this. Data was collected through questionnaire and semi structured interviews from the concerned department and was analyzed through SPSS. The findings clearly revealed that there is no systematic and strategic approach for conducting training and development programs in the health sector of Khyber Pakhtunkhwa. The main barriers appeared to be organizational environment and the political intervention. Moreover, organizational environment and political interventions are identified as the most important barriers for effectively conducting training and development programs.

Analysis of power system harmonics using singular value decomposition, least square estimation and FFT

Abstract: This research work will examine singular value decomposition (SVD), Fast Fourier Transform (FFT) and least square technique for the estimation of harmonics in power system. Harmonics in power system disturbs the quality of energy supplied to load, increased energy losses and reduce the reliability of the power system. In some cases, the large power converter systems produce not only typical harmonics but also a significant amount of inter harmonics which can significantly deteriorate the quality of power supply voltage. Inter harmonics are those components of current or voltage waveform which are not integer multiple of fundamental frequency component. Since poor power quality cause losses in power system that's why researchers are working to find techniques to estimate and control the harmonics in power system. Singular value decomposition approach is an ideal technique to estimate harmonics in power system located far away. Since in most of the cases, power system produce over determine equations which can easily be solved using SVD for optimal solution. Singular vector decomposition, SVD is really a mathematical method to lessen a dataset containing an extensive number of qualities to a dataset containing fundamentally less values, yet which still contains a huge portion of the variability introduce in the first information. SVD investigation brings about a more reduced representation of correlations, particularly with multivariate datasets and can give knowledge into spatial and temporal variations exhibited in the fields of data being analysed under different circumstance. Similarly traditional least square method is also one of the most prominent method to estimate the line of best fit. This research work will show the analysis of said techniques to find the optimal approximation of noisy and distorted wave form. To investigate effectiveness of said techniques; simulations will be carried out in MATLAB with same parameters.