Employee attitudes as a mediator between HRM and organizational performance

Attitude is a power that controls human behaviour. When employee Attitude is positive, it can give impact positive to organization performance. A proper human resource management (HRM) managed by organization, the employee attitude will be affected. HRM practices influence employee attitude positively and there is a mediating role of employee attitude between training and development dimension of HRM practices and organizational performance. Therefore, the purpose of this study is to explore employee atttiude as a mediator between HRM and organizational performance. A sample of this study was 219 respondents from employee construction in Libya. The data was analyzed using structural equation modelling (SEM) approach. This study showed that employee attitudes is a full mediator between relationship HRM and organizational performance. Therefore, HRM practices influence employee attitude and its give impact to organizational performance for more effective and efficient in achieving organization goal

Numerical Investigation of Natural Convection Heat Transfer from Square Cylinder in an Enclosed Enclosure Filled with Nanofluids

The enhancement of natural convection heat transfer using nanofluids from horizontal square cylinder placed in a square enclosure is investigated numerically. Water-based Cu is used as the working nanofluid. The investigation covered a range of Rayleigh numbers of 104 - 106, nanoparticles volume fraction of (00.2), enclosure width to cylinder height ratio, W/H of 2.5. The investigation includes the solution of the governing equations in the Vorticity-Stream function space with the aid of a body fitted coordinate system. Algebraic grid generation is used in the initial transformations, followed by an elliptic transformation to complete the grid generation to computational domain. The resulting discretized system of equations is solved using an ADI method. The built code is validated and the results showed an increase in average Nusselt number with increasing the volume fraction of the nanoparticles for the whole range of Rayleigh number. The isotherms are nearly similar when the volume fraction of nanoparticles is increased from 0 to 0.2 for each Rayleigh number but a change in the streamlines is observed

Management of urinary tract infections in elderly at the Rehabilitation Hospital Karin Grech

OBJECTIVE: To assess the percentage of patients suffering from urinary tract infections (UTIs) who were treated at the Rehabilitation Hospital Karin Grech (RHKG) and to evaluate treatment choices used to manage UTIs at the same hospital during a one-year period. METHOD: A retrospective and current study were carried out to collect information about patients who were diagnosed with UTIs namely age, gender, medical history, medications and presence of a catheter. This information was obtained from patient profiles in each of a total of 9 wards in the hospital. Analysis of data was carried out using Microsoft office Excel® 2010 and SPSS® version 20. KEY FINDINGS: Out of 165 UTI patients, 67% were female (n=111) and 33% were male (n=54). Thirty-seven percent of the patients were diabetic. Ninety patients had a catheter prior to the period of infection and an association between catheterisation and type and number of UTI pathogens was reported. Presence of a catheter increased the chance of being affected by two or three different types of UTI pathogens which are more resistant than pathogens which were contracted by non-catheterised UTI patients in one episode. The majority of UTI cases at RHKG were treated with nitrofurantoin (41.8%), the first line agent as mentioned in hospital guidelines, followed by ciprofloxacin and co-amoxiclav at 27.3% and 20.0% respectively. Out of the 41.8% of patients who were treated with nitrofurantoin, 30.4% had an estimated glomerular filtration rate (eGF R) and/or urinary pH unsuitable for nitrofurantoin use. CONCLUSION: A prevalence of UTIs in hospitalised patients at RHKG of 11% was identified. Catheterisation increased risk of UTI and presented with a higher number of different pathogens. Nitrofurantoin was the main antibacterial used in the management of UTIs.peer-reviewe

Numerical simulation of a low aspect ratio wing at low Reynolds number

In this work the numerical simulation of aerodynamic performance of low aspect ratio wings at low Reynolds numbers applicable to micro aerial vehicle is carried out. Commercial software STAR-CCM+ was used to simulate the flow and predict the aerodynamics performances of the low aspect ratio wing. Results were presented in terms of pressure coefficient distribution, flow visualization, lift and drag coefficients for angle of attacks ranging from 0˚ to 18˚ and Reynolds numbers ranging from 104 to 105 Keywords: Rectangular planform wing; Tip vortices; Flow separation . The results showed that, for rectangular planform wing, the distribution of the pressure is dominated by vortices. The results also showed the formation of tip vortices at lower Reynolds number for rectangular wing configuration. It is evident from the results that the type of wing configurations plays a very important role in delaying or preventing the flow separation

Comparison of high-order accurate schemes for solving the nonlinear viscous burgers equation

In this paper, a comparison between higher order schemes has been performed in terms of numerical accuracy. Four finite difference schemes, the explicit fourth-order compact Pade scheme, the implicit fourth-order Pade scheme, flowfield dependent variation (FDV) method and high order compact flowfie ld dependent variation (HOC-FDV) scheme are tes ted. The FDV scheme is used for time disc retization and the fourth-order compact Pade scheme is used for spatial derivatives. The solution procedures consist of a number of tri-diagonal matrix operations and produce an efficient solver. The comparisons are performed using one dimensional nonlinear viscous Burgers equation to demonstrate the accuracy and the convergence characteristics of the high-resolution schemes. The numerical results show that HOC-FDV is highly accurate in comparison with analytical and with other higher order schemes

Numerical Investigation of Hydromagnetic Effect on the Natural Convection Heat Transfer from Circular Cylinder in an Enclosed Enclosure

The natural convection heat transfer from horizontal circular cylinder placed in a square enclosure is investigated numerically. The study deals with the effect of magnetic field on the flow and heat transfer characteristics. The investigation employs different Hartman numbers (0, 50, 100, 200), different Rayleigh numbers (103, 104, and 105) with constant enclosure width to cylinder diameter ratios W/D = 2.5. The study included the solving of the governing equations in the form of the vorticity-stream function to be fitted with coordinate system. The algebraic grid generation is used to generate initial transformation. The elliptic grid generation is used to fit with physical domain between the heated horizontal cylinder and the enclosure into a computational domain. The resulting equations are solved using finite difference method that based on the finite volume. The research studied the influence of the variation the Hartman number on the local and average Nusselt numbers, flow patterns and temperature distributions with different Rayleigh numbers. The effect of Hartman numbers on the flow patterns and temperature distributions will be displayed using streamlines and isotherms. The results show that the conduction heat transfer is the dominant mode for low Rayleigh numbers. The convection heat transfer is the dominant mode of the heat transfer for high Rayleigh number in absence of the magnetic effect. The convection heat transfer convert to conduction mode at high Rayleigh numbers due to the effect of the magnetic field in the fluid. Also, the results show that the behavior of the local Nusselt numbers for Ha = 0 are unique and differ from those of other higher Hartman numbers for all Rayleigh numbers

A simulation study of video conferencing system over IEEE 802.11n Wireless LAN

Wireless local area network (WLAN) is the core of the classic wireless communications systems and owns the infrastructure which wide spreads in many regions in the world. IEEE 802.11n is an attractive standard of WLAN and offers a data capacity of the cell. This paper estimates the maximum limits of the IEEE 802.11n standard cell as a term of number of users which are successfully served by the cell in case of video conference application. The results shown that, the cell of 802.11n could serve about 9 users under the service of video conference in case of 20MHz channel bandwidth before congestion occurs while the 40MHz channel could support 18 users

Effects of Sequence Context on the Binding of Tryptophan-Containing Peptides by the Cucurbit[8]uril-Methyl Viologen Complex

This paper describes a novel assay for measuring the relative extent of peptide binding in a large parallel format and the use of this assay to explore the effects of sequence context on the binding of tryptophan (Trp)-containing peptides by the synthetic receptor comprising the noncovalent complex between cucurbit[8]uril and methyl viologen (i.e. Q8√MV). The extent of quenching of Trp fluorescence upon binding to Q8√MV was used to measure the relative extent of binding and thus the relative affinities of 104 Trp-containing peptides, in parallel, using a fluorescence plate reader. This study resulted in the remarkable observation that the identity of the amino acid residues at positions adjacent to the Trp-binding site has little if any influence on the binding affinity. This finding suggests that Q8√MV should be effective for the recognition of Trp residues within a broad range of peptide sequences

Co-Production of Cellulase and Xylanase Enzymes By Thermophilic Bacillus subtilis 276NS

Co-production of thermostable extracellular cellulase and xylanase was investigated using bacterial soil isolate. To evaluate the effect of culture conditions on the c-oproduction of both enzymes by Bacillus subtilis 276NS (GenBank accession number JF801740), a Plackett-Burman fractional factorial design was applied. Among the tested variables, yeast extract, sucrose and incubation time were the most significant variables increased cellulase and xylanase productions. Both of xylan and CMC (Carboxymethyl Cellulose) induced the xylanse enzyme production. A near-optimum medium formulation was obtained which increased the cellulase and xylanase enzymes 5.7- and 1.08 –fold higher than the yield obtained with the basal medium, respectively. Thereafter, the response surface methodology was adopted to acquire the best process conditions among the selected variables (xylan, CMC and Yeast Extract (YE)) required for improving xylanase yield. The optimal combinations of the major medium constituents for xylanase production evaluated using non-linear optimization algorithm of EXCEL-solver, was as follows (g/L): D-sucrose, 10; xylan, 10.367, CMC, 10.535; (NH4)2SO4, 1.0; YE, 1.71; Tween-80, 0.4 and FeSO4, 0.25 mg/L, at pH 8.0, temperature 35◦C and incubation time 24h under shaking. The predicted optimum thermostable xylanase activity was 360 U/ml, which was around 4-times the activity with the basal medium