oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 10 )

2019 ( 613 )

2018 ( 810 )

2017 ( 802 )

Custom range...

Search Results: 1 - 10 of 343672 matches for " Abdullah S. Al-Rashdi "
All listed articles are free for downloading (OA Articles)
Page 1 /343672
Display every page Item
Technology Acceptance: Course and Teaching Surveys Case Study at Sultan Qaboos University
Ali H. Al-Badi,Abdullah S. Al-Rashdi,Taher A. Ba-Omar
IBIMA Business Review , 2011,
Abstract: Course and teaching surveys (CTS) are an integral part of academic life in institutions of higher education. CTS are conducted with the aim of informing the University's commitment to continuous improvement in the delivery of high quality learning experiences for students. They are used also to gauge the students’ satisfaction with the course materials and the instructor(s) and to provide feedback to the instructor(s). Paper based surveys, for historical reasons, are frequently used for this task. With the rolling out of low cost and accessible web based systems, it is now possible to deploy computer-based instead of paper-based surveys. Paper based surveys present a problem due to the extensive amount of paper handling required, and offer greater potential for abuse by certain individuals. Electronic surveys facilitate more efficient development, distribution and reporting processes, but have some issues with motivating student responses. The objective of this research is of two folds; first, to explore the usefulness and effectiveness of using the web-based surveys in contrast to the paper-based ones by obtaining the opinions of the stakeholders (students, faculty members and staff); and secondly to investigate the causes behind the low number of students attempting the web-based surveys in comparison to the paper-based.Interviews with stakeholders) give different perspectives on this matter. Experience with a paper based survey, and the implementation of an electronic replacement at Sultan Qaboos University (SQU), allows the two approaches to be compared. The paper also investigates the acceptability and willingness of the students to use the newly created web-based survey. Many researchers have written about the Technology Acceptance Model (TAM), and some have provided extensions to the initially proposed model. In this paper we present a case study confirming the Perceived Usefulness of Technology (PUT) component of TAM, and how this factor influences a customer’s willingness to use a technology. The study showed clearly that the web-based CTS have much more advantages over the paper-based ones. Furthermore, if a user does not believe a technology is useful he/she will not use it. Many students claimed that they believe that the CTS have no benefits if there are not actions to be taken by the administration. The paper concludes by providing some recommendations to encourage people to use the technology under discussion, an on-line survey service.
Investigate the Corrosion Inhibition of Mild Steel in Sulfuric Acid Solution by Thiosemicarbazide  [PDF]
Fatma Mohamed Mahgoub, S. M. Al-Rashdi
Open Journal of Physical Chemistry (OJPC) , 2016, DOI: 10.4236/ojpc.2016.63006
Abstract: Corrosion inhibition of mild steel in 0.5 mol/L H2SO4 was investigated in the absence and presence of different concentrations of thiosemicarbazide. The inhibition efficiency of thiosemicarbazide was studied by electrochemical impedance methods, potentiodynamic polarization and scanning electron microscopy at different inhibitor concentrations. Inhibition efficiency, corrosion rate and surface coverage were evaluated at different concentrations of thiosemicarbazide. Electrochemical impedance plots indicated that the presence of the inhibitors increased the charge transfer resistance of the corrosion process, increasing the inhibition efficiency. Polarization curves showed that this compound acted as mixed type inhibitor. The results of the investigation showed that this compound had good inhibiting properties for mild steel corrosion in 0.5 M sulfuric acid. The adsorption isotherm studies showed that Thiosemicarbazide adsorbed chemisorbed and formed a stable surface complex on the mild steel surface. And Langmuir obeyed the adsorption isotherm. Scanning electron microscopy analysis shows that, the surface morphology of the polished mild steel in the presence of thiosemicarbazide as inhibitor is smoother surface as compared with polished mild steel specimen in the absence of inhibitor.
Potentiometric Determination of Stability Constants of Sulphathiazole and Glycine-Metal Complexes  [PDF]
Awad A. Al-Rashdi, A. H. Naggar, O. A. Farghaly, H. A. Mauof, A. A. Ekshiba
American Journal of Analytical Chemistry (AJAC) , 2018, DOI: 10.4236/ajac.2018.93009
Abstract: Binary and ternary complexes of (Fe(III), Pb(II), Co(II), Al(III), La(III), Sr(II), Cr(III), Ti(II) and Zr(II)) with sulphathiazole (as primary ligand) and amino acid glycine (as secondary ligand) have been studied potentiometrically at 25°C ± 0.1°C and I = 0.1 M NaClO4 in 25% (v/v) pure ethanol-water medium. Although there are many methods available to study the stability of metal-ligand complexes, pH-metry is most frequently used. In extension of our study on solution equilibria, we used Calvin-Bjerrum method for the calculation of stability constants. Stoichiometries and stability constants of binary systems containing the above metal ions in a 1:1 and 1:2 and/or 1:3 ratios were also determined to compare the effect of the secondary ligand on (1:1) Metal:Sulphathiazole system. The protonation constants of the complexes were evaluated for the system M:Sulphathiazole:Glycine = 1:1:1. The order of stability of the binary and ternary complexes was examined. It was found that glycine adds preferably [M-Sulfathiazole] rather than to the aqueous complexes of metal ions. In all cases 1:1:1 complex was formed.
The Patterns of Blood Groups and Its Association with Blood Donation in Saudi Arabia  [PDF]
Fahad A. Alateeq, Thamer Z. Aldugieman, Yousef Duhaim A. Al-Rashdi, Abdul Rahman Ali A. Alsogair, Saleh Hadi Alharbi, Ibrahim Bin Ahmed, Hussain Gadelkarim Ahmed
Open Journal of Preventive Medicine (OJPM) , 2018, DOI: 10.4236/ojpm.2018.89025
Abstract: Background: Blood groups system has key importance for transfusion safety and clinical practice. Therefore, the objective of the present study was to evaluate the distribution of ABO blood groups and its association with blood donation in Saudi Arabia. Methodology: In this study, we collected information regarding blood donation from 715 Saudi volunteers living in the city of Hail, Northern Saudi Arabia. Data about blood donation were obtained from 715 Saudi volunteers living in the city of Hail. Results: The majority of the study population was found with group B+ representing 174 participants, followed by A+, O+, AB+, B-ve, A-ve, AB-ve and O-ve, representing 165, 153, 47, 29, 20, 9, and 7 participants, in this order. Conclusion: The major blood group among Saudi population is group B+ followed by group A+ and O+. Individuals with rare blood groups were less likely to participate in blood donation programs, which necessitate the need for educational programs using motivating factors.
Integrated Business Intelligent System for E-Health: A Case for Dermatology Diseases  [PDF]
Faiza Abdulghani Al-Tajem Al-Ghamdi, Abdullah S. Al-Malaise Al-Ghamdi
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2014, DOI: 10.4236/jcdsa.2014.41008
Abstract:


In the current era, information technology has boosted every field of life either business industry or healthcare to integrate the internal processes of it. Due to the demand of managing huge data related to these fields numerous information systems play different roles in making the organizational processes robust and up to date. This paper discusses the integrated business intelligence implication specifically for healthcare to provide the fast and precise information on time. Therefore, this paper discusses the idea of building intelligent system based on Enterprise Resource Planning (ERP) databases using exclusively for dermatology diseases by applying data mining techniques. Firstly, classification mining has been applied for categorization data based on patient’s record. Then rules and patterns generated from the categorized data related to dermatology diseases, symptoms and treatments. The proposed system will retrieve the corresponding information related to the given symptoms along with medication and complete treatment. This research aims to integrate different ERP processes with centralized ERP database to provide business intelligence effectively for the dermatologists. The paper has provided with the comprehensive conceptual framework and each step has been discussed in detail.


Efficacy of Boesenbergia rotunda Treatment against Thioacetamide-Induced Liver Cirrhosis in a Rat Model
Suzy M. Salama,Mehmet Bilgen,Ahmed S. Al Rashdi,Mahmood A. Abdulla
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/137083
Abstract: Background. Experimental research in hepatology has focused on developing traditional medicines into potential pharmacological solutions aimed at protecting liver from cirrhosis. Along the same line, this study investigated the effects of ethanol-based extract from a traditional medicine plant Boesenbergia rotunda (BR) on liver cirrhosis. Methodology/Results. The BR extract was tested for toxicity on 3 groups of rats subjected to vehicle (10% Tween 20, 5 mL/kg) and 2g/kg and 5g/kg doses of the extract, respectively. Next, experiments were conducted on a rat model of cirrhosis induced by thioacetamide injection. The rats were divided into five groups and, respectively, administered orally with 10% Tween-20 (5 mL/kg) (normal control group), 10% Tween-20 (5 mL/kg) (cirrhosis control group), 50 mg/kg of silymarin (reference control group), and 250 mg/kg and 500 mg/kg of BR extract (experimental groups) daily for 8 weeks. The rats in normal group were intraperitoneally injected with sterile distilled water (1 mL/kg) 3 times/week, and those in the remaining groups were injected intraperitoneally with thioacetamide (200 mg/kg) thrice weekly. At the end of the 8 weeks, the animals were sacrificed and samples were collected for comprehensive histopathological, coagulation profile and biochemical evaluations. Also, the antioxidant activity of the BR extract was determined and compared with that of silymarin. Data from the acute toxicity tests showed that the extract was safe to use. Histological analysis of the livers of the rats in cirrhosis control group revealed uniform coarse granules on their surfaces, hepatocytic necrosis, and lymphocytes infiltration. But, the surfaces morphologically looked much smoother and the cell damage was much lesser in those livers from the normal control, silymarin and BR-treated groups. In the high-dose BR treatment group, the livers of the rats exhibited nearly normal looking lobular architecture, minimal inflammation, and minimal hepatocyte damage, the levels of the serum biomarkers and liver enzymes read nearly normal, and these results were all comparable to those observed or quantified from the normal and silymarin-treated groups. The BR extract had the antioxidant activity about half of what was recorded for silymarin. Conclusion. The progression of the liver cirrhosis can be intervened using the ethanol-based BR extract, and the liver’s status quo of property, structure, and function can be preserved. This capability of the extract warrants further studies exploring the significance of its pharmacologic potential in successfully treating the liver cirrhosis in humans.
How Much the Quality of Healthcare Costs? A Challenging Question!
Ismail Al Rashdi
Oman Medical Journal , 2011,
Abstract:
Knowledge and Attitude of Health Care Workers toward Human Immunodeficiency Virus Infection in King Abdulaziz Medical City  [PDF]
Fahad A. Al-Owais, Mohammed S. Al-Abdullah, Adel F. Al-Othman
Advances in Infectious Diseases (AID) , 2015, DOI: 10.4236/aid.2015.52010
Abstract: Background: Worldwide data shows that the stigma and discrimination for AIDS patients by health care providers have a negative impact on its epidemic. It discourages people from seeking care or being tested for HIV, thus reducing access to HIV/AIDS prevention. The study aims to evaluate the knowledge of the HCWs (health care workers) in King Abdulaziz Medical City about human immunodeficiency virus infection and their attitudes when？they encounter HIV/AIDS patients. Methodology: A cross-sectional study was designed to collect data using self-administered structured questionnaire from 90 health care workers. It was distributed among HCWs in different wards in King Abdulaziz Medical City in Riyadh in August 2014. Results: The study included a total number of 90 heath care workers, of which 31 were physicians and 59 were nurses. Around 81 (90%) of HCWs knew the causative agent for AIDS. Only 22 (24%) of HCWs knew the level of risk of HIV transmission following needle stick injury. Most of HCWs 66 (73%) knew that sexual practice was the most common mode of transmission. Around 27 (87%) of physicians and 33 (56%) of nurses were able to answer that antiretroviral therapy had the ability to control HIV-infection. In addition, 9 (10%) of HCWs believed that AIDS was curable. Conclusion: It was obvious from our study that there was some amount of general information and knowledge with our HCWs. However, an educational campaign will try to increase the level of awareness and clear any misconception or misleading theories about HIV infection with our health care workers.
Privacy Preserving Risk Mitigation Approach for Healthcare Domain  [PDF]
Shaden S. Al Aqeeli, Mznah A. Al-Rodhaan, Yuan Tian, Abdullah M. Al-Dhelaan
E-Health Telecommunication Systems and Networks (ETSN) , 2018, DOI: 10.4236/etsn.2018.71001
Abstract: In the healthcare domain, protecting the electronic health record (EHR) is crucial for preserving the privacy of the patient. To help protect the sensitive data, access control mechanisms can be utilized to restrict access to only legitimate users. However, an issue arises when the authorized users abuse their access privileges and violate privacy preferences of the patients. While traditional access control schemes fall short of defending against the misbehavior of authorized users, risk-aware access control models can provide adaptable access to the system resources based on assessing the risk of an access request. When an access request is deemed risky, but within acceptable thresholds, risk mitigation strategies can be exploited to minimize the risk calculated. This paper proposes a risk-aware, privacy-preserving risk mitigation approach that can be utilized in the healthcare domain. The risk mitigation approach controls the patient’s medical data that can be exposed to healthcare professionals, according to their trust level as well as the risk incurred of such data exposure, by developing a novel Risk Measure formula. The developed Risk Measure is proven to manage the risk effectively. Furthermore, Risk Mitigation Data Disclosure algorithms, RIMIDI0 and RIMIDI1, which utilize the developed risk measures, are proposed. Experimental results show the feasibility and effectiveness of the proposed method in preserving the privacy preferences of the patient. Since the proposed approach exposes the patient’s data that are relevant to the undergoing medical procedure while preserving the privacy preferences, positive outcomes can be realized, which will ultimately bring forth quality healthcare services.
Synthesis and Anticancer Activity of Some Novel Tetralin-6-yl-pyrazoline, 2-Thioxopyrimidine, 2-Oxopyridine, 2-Thioxo-pyridine and 2-Iminopyridine Derivatives
Ebtehal S. Al-Abdullah
Molecules , 2011, DOI: 10.3390/molecules16043410
Abstract: The title compounds were prepared by reaction of 6-acetyltetralin (1) with different aromatic aldehydes 2a-c, namely 2,6-dichlorobenzaldehyde, 2,6-diflouro-benzaldehyde, and 3-ethoxy-4-hydroxybenzaldehyde, to yield the corresponding a,b-unsaturated ketones 3a-c. Compound 3b was reacted with hydrazine hydrate to yield the corresponding 2-pyrazoline 4, while compounds 3a,b reacted with thiourea to afford the 2-thioxopyrimidine derivatives 5a,b, respectively. The reaction of 1, and the aromatic aldehydes 2a-c with ethyl cyanoacetate, 2-cyano-thioacetamide or malononitrile in the presence of ammonium acetate yielded the corresponding 2-oxopyridines 6a,b, 2-thioxopyridines 7a-c or 2-iminopyridines 8a,b, respectively. The newly prepared compounds were evaluated for anticancer activity against two human tumor cell lines. Compound 3a showed the highest potency with IC50 = 3.5 and 4.5 μg/mL against a cervix carcinoma cell line (Hela) and breast carcinoma cell line (MCF7), respectively.
Page 1 /343672
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.