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Search Results: 1 - 10 of 47915 matches for " DR. Ali Mustafa Abdullah Al Qudah "
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The Operating Efficiency and Market Value of Jordanian Privatized Firms: Fixed and Random Effects Analysis
DR. Ali Mustafa Abdullah Al Qudah
Interdisciplinary Journal of Research in Business , 2011,
Abstract: This study examines the impact of privatization by using a unique sample of 23 Jordanian privatized firms through the period 1992-2005.This study offers new measures not used in previous studies. In particularly, operating efficiency is measured by turnover ratio (fixed assets turnover) and performance is measured by market value ratio (share market price to share book value). Panel data analysis is employed to determine the impact of privatization on firms’ efficiency and performance. The results show that privatization has a positive and significant impact on privatized firms operating efficiency and performance as measured by market value ratio. This finding is consistent with most of the existing evidences on the impact of privatization on performance and efficiency. The results also show that strategic partner has a positive and significant impact on privatized firms operating efficiency and market value. In general Liquidity has a positive impact on privatized firms’ operating efficiency and performance. The study documents that firms’ specific effect (size) is a significant performance determinant since it influences operating efficiency and performance of privatized firms’. The present study also finds that openness of the economy is also a factor that affects privatized firms operating efficiency and performance.
The effect of low serum bicarbonate values on the onset of action of local anesthesia with vertical infraclavicular brachial plexus block in patients with End-stage renal failure
Al-mustafa Mahmoud,Massad Islam,Alsmady Moaath,Al-qudah Abdullah
Saudi Journal of Kidney Diseases and Transplantation , 2010,
Abstract: Vertical infraclavicular brachial plexus block is utilized in patients with chronic renal failure at the time of creation of an arterio-venous fistula (AVF). The aim of this study is to test the effect of impaired renal function, with the resulting deranged serum electrolytes and blood gases, on the success rate and the onset of action of the local anesthetics used. In this prospective clinical study, we investigated the effect of the serum levels of sodium, potassium, urea, crea-tinine, pH, and bicarbonate on the onset of action of a mixture of lidocaine and bupivacaine administered to create infraclavicular brachial plexus block. A total of 31 patients were studied. The success rate of the block was 93.5 % (29 patients). The mean onset time for impaired or re-duced sensation was found to be 8.9 ± 4.7 mins and for complete loss of sensation, was 21.2 ± 6.7 mins. There was no significant association with serum sodium, potassium, urea, creatinine or the blood pH level (P> 0.05). The bivariate correlation between serum bicarbonate level and the partial and complete sensory loss was -0.714 and -0.433 respectively, with significant correlation (P= 0.00, 0.019). Our study suggests that infraclavicular block in patients with chronic renal failure carries a high success rate; the onset of the block is delayed in patients with low serum bicarbonate levels.
The Effect of Various Waste Materials’ Contents on the Attenuation Level of Anti-Radiation Shielding Concrete
Ali Basheer Azeez,Kahtan S. Mohammed,Mohd Mustafa Al Bakri Abdullah,Kamarudin Hussin,Andrei Victor Sandu,Rafiza Abdul Razak
Materials , 2013, DOI: 10.3390/ma6104836
Abstract: Samples of concrete contain various waste materials, such as iron particulates, steel balls of used ball bearings and slags from steel industry were assessed for their anti-radiation attenuation coefficient properties. The attenuation measurements were performed using gamma spectrometer of NaI (Tl) detector. The utilized radiation sources comprised 137Cs and 6 0Co radioactive elements with photon energies of 0.662 MeV for 137Cs and two energy levels of 1.17 and 1.33 MeV for the 6 0Co. Likewise the mean free paths for the tested samples were obtained. The aim of this work is to investigate the effect of the waste loading rates and the particulate dispersive manner within the concrete matrix on the attenuation coefficients. The maximum linear attenuation coefficient (μ) was attained for concrete incorporates iron filling wastes of 30 wt %. They were of 1.12 ± 1.31×10 ?3 for 137Cs and 0.92 ± 1.57 × 10 ?3 for 6 0Co. Substantial improvement in attenuation performance by 20%–25% was achieved for concrete samples incorporate iron fillings as opposed to that of steel ball samples at different (5%–30%) loading rates. The steel balls and the steel slags gave much inferior values. The microstructure, concrete-metal composite density, the homogeneity and particulate dispersion were examined and evaluated using different metallographic, microscopic and measurement facilities.
The Usage of Social Media and E-Reputation System in Global Supply Chain: Comparative Cases from Diamond & Automotive Industries  [PDF]
Mostafa Mohamad, Mohammed Ali, Abdullah Sultan Abdullah, Al Shimaa Elfiky
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2018, DOI: 10.4236/ijcns.2018.115006
Abstract: The last decade witnesses a heave use of social media-based information systems in different fields of business such as logistics, procurement, and supply chain management. Managing these types of information systems, could help companies to outsource their supply chain functions in a global scale and enhance their competitive advantages. However, the digital performance of these activities inherent risks of inappropriate supplier selection, lack of trust, bounded rationality and uncertainty about the supply conditions (e.g., pricing, shipping and timing). To address such challenges, this research explains how companies use e-reputation systems and social media to select their global trusted suppliers. Based on two-case evidence from British Diamond and Egyptian Automotive companies, the researchers conducted 20 interviews with purchasing and supply chain professionals. Chen & Lin’s reputation system model has been adopted to explain the process of selecting and evaluating a trusted supplier and to inform our data analysis. Our findings referred to the lack of experience among diamond professionals on how to use e-reputation systems and their lack of understanding to the role of social media-based ratings or referrals during the stages of selection suppliers’ discovery and approval. Though, automotive professionals find e-reputation system a strong tool to build goodwill, tacit credibility, competence and predictable trust. Ironically, both cases confirm that supply chain professional use these systems to re-evaluate and reselect their existing suppliers than to extend new supply networks.
Iron Bioavailability of Rats Fed Liver, Lentil, Spinach and their Mixtures
Abdullah Y. Rewashdeh,Jafar M. El-Qudah,Hanee Al-Dmoor,Maisa M. Al-Qudah
Pakistan Journal of Biological Sciences , 2009,
Abstract: To study the effects of dietary iron source (basal diet-FeSO4.7H2O, liver, lentil, spinach, liver + lentil, liver+spinach and lentil+spinach) on iron bioavailability, fifty-six Albino Sprague Dawley derived male 21 days old rats were fed on iron-deficient diet (7.8 mg Fe kg-1 diet) and the mentioned seven iron containing diets (40 mg Fe kg-1 diet) for 10 days. Rats fed liver diet showed higher iron apparent absorption (52.1%), hemoglobin (Hb) gain (0.94 g/100 mL), Hb-iron gain (1.2 mg), Hb-regeneration efficiency (HRE%) (50.8%), relative efficiency of HRE% (106.5%), packed cell volume gain (2.22%) and mean corpuscular hemoglobin concentration (0.64 g dL-1). Liver resulted in an increase in these parameters when mixed with lentil and spinach diets. However, rats fed iron free diet showed the higher dry matter absorption.
Denoising of Medical Images Using Multiwavelet Transforms and Various Thresholding Techniques  [PDF]
Abdullah Al Jumah, Mohammed Gulam Ahamad, Syed Amjad Ali
Journal of Signal and Information Processing (JSIP) , 2013, DOI: 10.4236/jsip.2013.41003
Abstract:

The problem of estimating an image corrupted by additive white Gaussian noise has been of interest for practical reasons. Non-linear denoising methods based on wavelets, have become popular but Multiwavelets outperform wavelets in image denoising. Multiwavelets are wavelets with several scaling and wavelet functions, offer simultaneously Orthogonality, Symmetry, Short support and Vanishing moments, which is not possible with ordinary (scalar) wavelets. These properties make Multiwavelets promising for image processing applications, such as image denoising. The aim of this paper is to apply various non-linear thresholding techniques such as hard, soft, universal, modified universal, fixed and multivariate thresholding in Multiwavelet transform domain such as Discrete Multiwavelet Transform, Symmetric Asymmetric (SA4), Chui Lian (CL), and Bi-Hermite (Bih52S) for different Multiwavelets at different levels, to denoise an image and determine the best one out of it. The performance of denoising algorithms and various thresholding are measured using quantitative performance measures such as, Mean Square Error (MSE), and Root Mean Square Error (RMSE), Signal-to-Noise Ratio (SNR), Peak Signal-to-Noise Ratio (PSNR). It is found that CL Multiwavelet transform in combination with modified universal thresholding has given best results.

The Impact of Oral Health Practice and Oral Health Knowledge Level of Caregivers on Periodontal Status of Some Special Needs Adults in Aseer Region, Saudi Arabia  [PDF]
Mohammed MA. Abdullah Al-Abdaly, Redwan Abdullah AbuEshy Almalki, Ahmed Mohammed Ali Shalan
Open Journal of Stomatology (OJST) , 2019, DOI: 10.4236/ojst.2019.95012
Abstract: Background: The objective of the present study is to evaluate the impact of oral health practice and knowledge level of caregivers on periodontal status of adults special needs in Aseer Region, Saudi Arabia. Methodology: A cross-sectional study was conducted on 180 caregivers and 180 adults with special needs divided into three equal groups (n = 60 + 60 + 60) based on type of disabilities: Visual impairment group (I); moderate mental retardation group (II); and physical impairment group (III). Questionnaire forms were used to assess the oral health practice and knowledge level of caregivers. The clinical examination of special needs adults was done to assess the effect of oral health practice and knowledge level of caregivers on periodontal status of adults special needs. All data were collected and analyzed by the SPSS statistical software and (ANOVA) to assess the variations in the mean and standard deviation (±SD) of clinical findings. Results: Acceptable periodontal, oral health knowledge, awareness and oral health practice were detected among caregivers, particularly, group (II) more than group (III) and group (I). But there were no significant differences in periodontal clinical parameter scores in the comparison between the study groups. Conclusion: It is concluded that the level of oral health practice and knowledge of caregivers included within the current study, were not effective in keeping periodontal health of special needs adults.
Determination of Genotoxic Pollution of Some Hospital Wastewater with Salmonella Ames Test  [PDF]
Ali R?za Atasoy, Engin Karakece, Mustafa Petek, Lokman Alpsoy, Abdullah Kiran
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.410100
Abstract: Wastewater of hospitals contains materials that would be a threat to alive. These water needs to be checked by a biological purification before leaving to nature. Hospital wastewater has differences than domestic waste because of especially blood, body waste, drugs, chemicals, medical device waste and radioactive materials. We aimed to determine genotoxic effects of total pollution in hospital wastewater on alive by Salmonella microsome test method. In this study, we decided on three hospitals which weren’t checked as biological purification of waste. The samples were taken for six 1-week periods between March 2009 and June 2009. Mutagenite studies of samples taken from hospitals were made with ,Salmonella typhimurium TA 98 and TA 100. Wastewater samples were evaporated. 27 different test materials were prepared using DMSO, ethanol and acetone solvents, two different MGA plaques were used for each test material. Each experiment was made for 3 times with known results of mutagens and we made it ready for “Ames” test method. We had genotoxicity 50% in Istanbul University Medical Faculty Hospital, 56% in Haseki Hospital and 61% in Vak?f Gureba Hospital. According to three hospitals result there are 9 positives, 9 negatives in DMSO; 9 positives, 9 negatives in ethanol; 12 positives, 6 negatives in acetone. These values are totally 56%. Our results give important information about mutagenic effect of total pollution in hospital wastewater. It is first time researched in Turkey that effect on DNA of pollution is from hospital wastewaters. In prospective studies, it is necessary to use this system as a method to monitor mutagenic genotoxic pollution in hospital wastewaters. These kinds of studies present applicability and importance of our method because of placing in the literature. Method constitutes a new approach to check mutagenite of pollution in hospital wastewater.
Clinicopathological Study on the Effects of Momordica charantia on Streptozotocin-Induced Diabetic Wistar Rats  [PDF]
Mohammed Salem Moqbel, Fahad Abdullah Al-Hizab, Seif Mustafa Barakat
Open Journal of Veterinary Medicine (OJVM) , 2017, DOI: 10.4236/ojvm.2017.75006
Abstract: Momordica charantia (MC) a traditional medicine used for the treatment of many disorders was fed to streptozotocin (STZ)-induced diabetic male Wistar rats at 2, 5 and 10% of the standard diet. Rats were then observed for 12 weeks before sacrificed. Immediately, tissues from liver, kidney and pancreas were taken for histopathological examination. Serum samples were analyzed to evaluate liver, kidney and pancreatic functions. In addition, blood samples were collected to analyze hematology parameters. The results of the present study indicate that oral doses of MC at 5% and 10% of the daily diet resulted in alleviation of the pancreatic, hepatic and renal dysfunction induced by diabetes. The improved pancreatic, hepatic and renal functions were judged by histopathological, hematological and serobiochemical parameters. In conclusion, the MC fruits may be used as an antidiabetic herbal medicine.
Management of Severe Hallux Valgus Using Combined Proximal Closing Osteotomy with a Distal Soft Tissue Reconstruction
Abdullah Ali Al-Zahrany
Egyptian Journal of Hospital Medicine , 2012,
Abstract: Background: many surgical procedures were described for correction of hallux valgus and the type of operation is based upon; foot length, width and redressibility of the transverse arch, hallux valgus evaluation of possibility of its passive redression and radiographic examination of foot. Aim of the work: To evaluate the results of hallux valgus surgery combining the distal soft tissue reconstruction (DSTR) or modified McBride procedure and proximal closing wedge osteotomy of the first metatarsal base. Patients and methods: This prospective study, was performed in King Abdul-Aziz Hospital, Taif, Saudi Arabia. The study was approved by the local committee of human research, and all patients gave written informed consent to participation. Ten patients (8 women and 2 men) with mean age of 28 years (18-40 years) were included in the study with 16 surgeries. The mean postoperative follow-up was 36 months (28 – 48). The operative technique performed in these patients was a combination of DSTR with closing osteotomy of the first metatarsal base.Results: The mean pre-operative intermetatarsal 1-2 angle (IMA) revealed by radiographs was surgically corrected from 20.3 degrees at the baseline to the mean degree of 7.9. The mean pre-surgical hallux valgus angle (HVA) was 44.9 degrees proved by radiographs was surgically improved to 11.7 degrees, and 3 years after operation it reached 12.3 degrees (mean). Ninety percent of patients were satisfied with their surgical results and cosmetic improvements were achieved in 93.7 % (15/16 feet in 9 patients). Conclusion: The combination of wedge osteotomy of the first metatarsal base and the distal soft tissue reconstruction (DSTR) or modified McBride procedure is suit able in the treatment of young patients having severe forms of hallux valgus and minimum arthritic changes in metatarsophalangeal joint with increased IMA.
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