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Search Results: 1 - 10 of 403803 matches for " Abdullah M Aldakhil "
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Employee Engagement and Strategic Communication in Saudi Arabian Banks
Arshad Ahmad,Abdullah M Aldakhil
IBIMA Business Review , 2012,
Abstract: The purpose of this paper is to examine the perceptions of individual employees on communication and its impacts on employee engagement in banks. Despite the extensive research on employee engagement and communication, very little or no empirical research has examined this scope of investigative study. Therefore, the hypotheses are developed to test and examine this relationship empirically. This study contributes in advancing the employee engagement literature to understand the association between communication and employees engagement within the context of banking industry. The results of this study reveal that communication with shared purpose, leadership attention, and communication based on dialogue are significantly positively associated with employee engagement. In communication, leadership attention is found to be strongly associated with employee job satisfaction and commitment in employee engagement.
Rock Slope Stability Problems in Wadi Quaz-Dam Site No. 2, Jeddah-Saudi Arabia  [PDF]
Ali Abdullah M. Alzahrani
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.34026
Abstract: The present investigation deals with the engineering geological studies of soil and rock masses in the Wadi Quaz area-Dam No. 2, East of Jeddah. Wadi Quaz area-Dam No. 2, East of Jeddah, Saudi Arabia often faces floods during rainy seasons, so it is so urgent to investigate the area before building any dam or preventing water from flow. Preventing water from flow will produce new dangerous factors such as uplift force which may cause the dam failure. To have a better understanding of the factors that may affect the slope stability, many rock slope locations are observed in detail to assess the effect of discontinuities formed in the rock masses. Fieldwork and Laboratory tests were carried out on soil and rocks. Soils included identification of soil type using unified soil classification system, permeability, water content and field density were done for soils. Rocks include identification of physical and mechanical properties such as: rock type, degree of weathering, rock strength, RQD, joint spacing measurements, and geometric properties (Dip, and Dip direction). Different methods were used to evaluate the potential failure in the studied area depending on rock mass rating and slope stability analysis. The well-known classification of rock masses titled Rock Mass Rating system [1] was used for categorizing the rock masses in the studied area besides slope mass rating [2] which would help to estimate the rock stability. The kinematical analysis was applied to investigate the potential failure mode which might occur in the dam abutments. This paper will provide the stability of dam abutments in both summer season and winter season besides general estimation of the seepage problems related to the soil and according to its permeability.
Efficacy of three anticoagulant rodenticides against Rattus rattus and Meriones libycus under laboratory conditions
Mohamed A. Aldakhil
Pakistan Journal of Biological Sciences , 1999,
Abstract: Three anticoagulant rodenticides were used against Rattus rattus and Meriones libycus in choice and no choice feeding tests under laboratory conditions. In choice feeding tests, brodifacoum (0.005 %) and chlorophacinone (0.005 %) were more effective (P<0.05) than coumatetrahyl (0.0375 %) against R. rattus. Brodifacoum (0.005 %) and coumatetrahyl (0.0375 %) were more effective (P<0.05) than chlorophacinone (0.005 %) against M. libycus. In no choice feeding tests, coumatetrahyl (0.0375 %) and brodifacoum (0.005 %) were more effective than chlorophacinone (0.005 %) against M. libycus It was concluded that brodifacoum (0.005 %) was more effective against R. rattus while, coumatetrahyl (0.0375%) was more effective against M. libycus.
EER Improvement for Room Air-Conditioners in Saudi Arabia  [PDF]
Abdullah M. Al-Shaalan
Energy and Power Engineering (EPE) , 2012, DOI: 10.4236/epe.2012.46058
Abstract: This paper demonstrates the possibility of achieving a higher Energy Efficiency Ratio (EER) for Room Air Conditioners (RACs) that complies with the Saudi energy efficiency standards and satisfies the energy conservation requirements for the Saudi Building Code (SBC). This study considers several design options for improving the performance and efficiency of the RAC in comparison with a baseline RAC unit manufactured by Al-Zamil Company of Saudi Arabia. These design options include the number of condenser and evaporator rows, fins density, frontal area, compressor types, and refrigerant types. The experimental data obtained is through testing the units in Calorimeter according to standard ASHRAE-16. Also, the uncertainty in measurements and its propagation are included in this study. This paper reports the results of a set of measurements carried out on a modified RAC and compares them with the tested baseline RAC unit at similar load conditions. The experimental results indicate the effectiveness of increasing the number of condenser rows in comparison with other design options considered for achieving higher EER for RACs.
Technical and Economical Merits of Power Systems Interconnection  [PDF]
Abdullah M. Al-Shaalan
Journal of Power and Energy Engineering (JPEE) , 2013, DOI: 10.4236/jpee.2013.14004

This work aims at exploring the effects of the interconnection between isolated electric power systems upon some important aspects such as enhancing reliability levels along with reducing installation and operation costs. To discern the advantages associated with this study, the developed methodology has been applied to three existing power systems in the northern region of the Kingdom of Saudi Arabia presently within the concession domain of the Saudi Electric Company (SEC). These systems have been established to meet the present loads and to withstand future electrical demands for a period of time before additional generation and transmission reinforcements are needed. In this work, reliability measures have been utilized to determine the period that these systems can fulfill the present and future loads without affecting the reliability levels and the threshold that an additional capacity should be added to maintain those required reliability levels. In application to the reliability criteria, technical, operational and economic advantages can be realized, i.e., higher reliability levels and lower installation and operation costs after the proposed interconnection between these selected isolated power systems take place.

Importance of Ankle/Brachial Pressure Index in Saudi Patients with Coronary Artery Disease  [PDF]
Abdullah M. Alshehri, Mohamed Elsharawy
World Journal of Cardiovascular Surgery (WJCS) , 2013, DOI: 10.4236/wjcs.2013.36036
Abstract: Background: The ankle/brachial pressure index (ABPI) has been shown to be a good marker of systemic atherosclerosis and a powerful predictor of cardiovascular morbidity and mortality. The objective of this study was to determine the importance of measuring ABPI in Saudi patients with coronary artery disease (CAD). METHODS: This is a hospital based cross-sectional study which was conducted on all Saudi patients who underwent coronary angiography without symptoms of peripheral arterial disease at King Fahd Hospital of the University, Al-Khobar Saudi Arabia. All patients underwent measurement of their ABPI. The study was carried out between December 2010 and November 2011. RESULTS: During the study period, two hundred and five patients were included. Fifty-nine (28.8%) patients were Group II (ABPI ≤ 0.90) and the rest was Group I (ABPI > 0.90). Significant correlation was also found between low ABPI and the extent of CAD (mean number of arteries involved in Group I was 1.78 ± 0.83 compared to 2.10 ± 0.736 in Group II p = 0.011). Nevertheless, the correlation between low ABPI, and the severity of presentation of CAD were also significant (Incidence of myocardial infarction with congestive heart failure was 0.5% in Group I compared to 12% in Group II p < 0.001). CONCLUSION: The ABPI is an important prognostic indicator for Saudi patients with CAD.
Obstacles Facing Developing Countries in Power System Planning  [PDF]
Abdullah M. Al-Shaalan
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34002

The problem of power system planning, due to its complexity and dimensionality, is one of the most challenging problems facing the electric power industry in developing as well as developed countries. In planning phase, two of the most important decision-making parameters are the reliability and costs. The latter includes both system investment costs and outages costs. In this paper, these parameters are described and the interrelation between them is evaluated. Some previous approaches and developed techniques will he applied to a particular planning problem in a developing country and some aspects having a significant impact on the decision making process in the planning phase will be considered.

Proposed Measures to Mitigate Energy Interruptions in Residential Sector  [PDF]
Abdullah M. Al-Shaalan
Journal of Power and Energy Engineering (JPEE) , 2017, DOI: 10.4236/jpee.2017.56005
Abstract: This study investigates and analyzes the electric energy interruptions impact upon the residential sector in Riyadh city, the capital of the Kingdom of Saudi Arabia (KSA) resulting from severe power outages. The study results show that this sector which constitutes about 54% of the Saudi Electric Company in the Central Operating Area (SEC-COA) will suffer enormous tangible and intangible losses should occur in specific times, seasons and last for longer durations. The results obtained for the costs of these energy interruptions reveal a time-dependent non-linear outage cost variation. In order to reduce these energy interruptions and hence mitigate their adverse effects and consequences, the study proposes proper practical measures and solutions without compromising the consumers’ needs and convenience.
Investigating Practical Measures to Reduce Power Outages and Energy Curtailments  [PDF]
Abdullah M. Al-Shaalan
Journal of Power and Energy Engineering (JPEE) , 2017, DOI: 10.4236/jpee.2017.511003
Abstract: This work attempts to investigate some practical measures that may reduce severe power outages that lead to energy curtailments. The first step of this attempt is to explore, from the consumer’s perspective, the adverse effects of the energy curtailments that reflect enormous damages (tangible and intangible) to the residential sector in the city of Riyadh (the capital of the Kingdom of Saudi Arabia). The second step is to propose, analyze, and employ energy conservation strategies that lead to both energy conservation and costs savings. The study results show that some customers will suffer enormous tangible and intangible losses should these outages occur during specific times, seasons, and for prolonged durations. In order to reduce these power outages and hence mitigate their adverse effects and consequences, the study proposes proper practical measures and solutions without compromising the consumers’ needs, satisfaction, and convenience.
Conditions Associated with Intrauterine Fetal Demise (IUFD) in Pregnant Women at King Abdulaziz University (KAUH). A Five-Year Experience  [PDF]
Abdullah M. Kafy, Ayman Oraif
Open Journal of Obstetrics and Gynecology (OJOG) , 2017, DOI: 10.4236/ojog.2017.713129
Abstract: Background: Intrauterine fetal demise is the death of the fetus after twenty week of gestation but before the onset of labor. In more than 50% of cases, the etiology of antepartum fetal death is not known or cannot be determined. Several factors attributed to the risk of IUFD. This study aimed to determine the incidence of IUFD, as well as associated conditions. Method: This retrospective study enrolled all pregnant women who attending at KAUH between 2011 and 2015. Results: During the last five years 248 verified IUFD cases were reported, the mean age was 30.59. Saudi nationality represented by 27 %. PET was represented 17.7% and congenital malformation was represented by 7.3% as risk factors. Regarding the mode of delivery SVD was 58.9% followed by CS 28.6. Conclusion: Stillbirth is an unfavorable event, there are several factors (maternal, fetal & placenta) associated with IUFD. Providing good level of antenatal care helped in reducing IUFD incidence.
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