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Search Results: 1 - 10 of 2271 matches for " Alzahrani OH "
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Learning strategies of medical students in the surgery department, Jeddah, Saudi Arabia
Alzahrani HA, Alzahrani OH
Advances in Medical Education and Practice , 2012, DOI: http://dx.doi.org/10.2147/AMEP.S34780
Abstract: rning strategies of medical students in the surgery department, Jeddah, Saudi Arabia Original Research (1335) Total Article Views Authors: Alzahrani HA, Alzahrani OH Published Date August 2012 Volume 2012:3 Pages 79 - 87 DOI: http://dx.doi.org/10.2147/AMEP.S34780 Received: 07 June 2012 Accepted: 24 July 2012 Published: 23 August 2012 Hasan A Alzahrani,1 Owiss H Alzahrani2 1Department of Surgery, 2Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia Objectives: To identify medical students' perceptions of their learning strategies including, learning habits, resources, and preferred teaching methods, in the Department of Surgery (DOS) of the King Abdulaziz University-Faculty of Medicine (KAU-FoM), in Jeddah, Saudi Arabia. Methods: A cross-sectional descriptive study which was designed to identify students' perceptions of their learning in the DOS of the KAU-FoM. A questionnaire was administered to a random group of 549 medical students, to explore student perceptions of their learning strategies including methods of learning and learning resources. Results: The majority believed that clinical session attendance is always important compared with lectures (88.9% vs 21.9%). Nevertheless, clinical sessions were selected as the third source of learning after learning from assigned textbooks and previous examination model answers. The majority (74.1%) believed that self-instruction at home is the preferred method of learning. Conclusion: Student perspectives should be taken into consideration prior to any future reforms of curriculum. Reforms should adopt a “think globally; act locally” educational strategy based on learner needs.
Learning strategies of medical students in the surgery department, Jeddah, Saudi Arabia
Alzahrani HA,Alzahrani OH
Advances in Medical Education and Practice , 2012,
Abstract: Hasan A Alzahrani,1 Owiss H Alzahrani21Department of Surgery, 2Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi ArabiaObjectives: To identify medical students' perceptions of their learning strategies including, learning habits, resources, and preferred teaching methods, in the Department of Surgery (DOS) of the King Abdulaziz University-Faculty of Medicine (KAU-FoM), in Jeddah, Saudi Arabia.Methods: A cross-sectional descriptive study which was designed to identify students' perceptions of their learning in the DOS of the KAU-FoM. A questionnaire was administered to a random group of 549 medical students, to explore student perceptions of their learning strategies including methods of learning and learning resources.Results: The majority believed that clinical session attendance is always important compared with lectures (88.9% vs 21.9%). Nevertheless, clinical sessions were selected as the third source of learning after learning from assigned textbooks and previous examination model answers. The majority (74.1%) believed that self-instruction at home is the preferred method of learning.Conclusion: Student perspectives should be taken into consideration prior to any future reforms of curriculum. Reforms should adopt a “think globally; act locally” educational strategy based on learner needs.Keywords: education, medical, learning, surgery, developing countries
Eco-Friendly Production of Silver Nanoparticles from Peel of Tangerine for Degradation of Dye  [PDF]
Eman Alzahrani
World Journal of Nano Science and Engineering (WJNSE) , 2015, DOI: 10.4236/wjnse.2015.51002
Abstract: Green chemistry methods for production of nanoparticles have many advantages, such as ease of use, which makes the methods desirable and economically viable. The aim of the present work was to green synthesise silver nanoparticles (SNPs) using aqueous tangerine peel extract in different ratios (2:1, 1:1, 1:2). The formed SNPs were characterised using ultraviolet-visible (UV-Vis) spectrophotometry, and transmission electron microscopy (TEM). The UV-Vis spectra showed that the highest absorbance was observed when the ratio of peel tangerine extract to silver nitrate solution was 1:2. The transmission electron micrographs showed the formation of poly dispersed nanoparticles. It was found that the average diameter of the nanoparticles was 30.29 ± 5.1 nm, 16.68 ± 5.7 nm, and 25.85 ± 8.4 nm, using a tangerine peel solution and silver nitrate solution ratio of 2:1, 1:1, and 1:2, respectively. The formed SNPs were evaluated as catalysts for methyl orange dye degradation, and the results confirmed that SNPs can speed up the degradation of the dye.
Sensitivity of Esophageal Scintigraphy (Milk Scans) in Detecting Gastro-Esophageal Reflux  [PDF]
Saeed Bafaraj, Awad Alzahrani
Open Journal of Medical Imaging (OJMI) , 2015, DOI: 10.4236/ojmi.2015.51001
Abstract: Gastro-esophageal scintigraphy (milk scan) is an accurate technique for detecting gastro-esophageal reflux that can be performed rapidly with minimal patient discomfort. A retrospective study was performed to find out to how much radionuclide milk scan is sensitive for detecting gastro-esophageal reflux (GER) for 89 patients who subjected to milk scan within Years 2010 to 2013. The study group age is ranging from one month old to four years old. Milk scan was performed using PHILIPS and SEIMENS machine. Tc 99-m sulfur colloid with milk administrated orally or through nasogastric tube to the patient. The highest frequency for milk scan study was in age group of 0 - 6 months old with 77% positive finding. Patients who suffer repeated vomiting represented the highest reason of examination for milk scan (46% of overall cases), while chocking attacks, pulmonary aspiration, and congenital heart disease, were 26%, 16%, 12% respectively of the overall cases. Seventy-nine percent of patients who prepared to be examine using nasogastric tube found with positive finding, 50% of GER patients have abnormal tracer activity in the mid of esophagus; on the other hand, 50% of GER patients divided equally between the lower and upper esophagus. The study show that infants especially in age of 0 - 6 months old and with repeated vomiting symptoms are strongly recommended to milk scan study rather than fluoroscopy to avoid unnecessary dose to the patients.
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.
A Survey of Cloud Computing Detection Techniques against DDoS Attacks  [PDF]
Sabah Alzahrani, Liang Hong
Journal of Information Security (JIS) , 2018, DOI: 10.4236/jis.2018.91005
Abstract:
A Distributed Denial of Service Attack (DDoS) is an attack in which multiple systems compromised by a Trojan are maliciously used to target a single system. The attack leads to the denial of a certain service on the target system. In a DDoS attack, both the target system and the systems used to perform the attack are all victims of the attack. The compromised systems are also called Botnets. These attacks occur on networked systems, among them the cloud computing facet. Scholars have tried coming up with separate mechanisms for detecting and preventing such attacks long before they occur. However, as technology progresses in advancement so do the attack mechanisms. In cloud computing, security issues affect various stakeholders who plan on cloud adoption. DDoS attacks are such serious concerns that require mitigation in the cloud. This paper presents a survey of the various mechanisms, both traditional and modern, that are applied in detecting cloud-based DDoS attacks.
Generation of DDoS Attack Dataset for Effective IDS Development and Evaluation  [PDF]
Sabah Alzahrani, Liang Hong
Journal of Information Security (JIS) , 2018, DOI: 10.4236/jis.2018.94016
Abstract: Distributed Denial of Service (DDoS) attacks are performed from multiple agents towards a single victim. Essentially, all attacking agents generate multiple packets towards the victim to overwhelm it with requests, thereby overloading the resources of the victim. Since it is very complex and expensive to conduct a real DDoS attack, most organizations and researchers result in using simulations to mimic an actual attack. The researchers come up with diverse algorithms and mechanisms for attack detection and prevention. Further, simulation is good practice for determining the efficacy of an intrusive detective measure against DDoS attacks. However, some mechanisms are ineffective and thus not applied in real life attacks. Nowadays, DDoS attack has become more complex and modern for most IDS to detect. Adjustable and configurable traffic generator is becoming more and more important. This paper first details the available datasets that scholars use for DDoS attack detection. The paper further depicts the a few tools that exist freely and commercially for use in the simulation programs of DDoS attacks. In addition, a traffic generator for normal and different types of DDoS attack has been developed. The aim of the paper is to simulate a cloud environment by OMNET++ simulation tool, with different DDoS attack types. Generation normal and attack traffic can be useful to evaluate developing IDS for DDoS attacks detection. Moreover, the result traffic can be useful to test an effective algorithm, techniques and procedures of DDoS attacks.
Healing of chronic diabetic foot ulcers with a skin substitute: Patient selection is the key to success  [PDF]
Hasan Alzahrani, Hossam Ammar, Anas Alzahrani, Hossam Shoaib
Open Journal of Regenerative Medicine (OJRM) , 2013, DOI: 10.4236/ojrm.2013.22003
Abstract:

This is a prospective case series study aimed to preliminarily assess the efficacy and safety of a skin substitute (Apligraf) application to heal chronic diabetic foot ulcers (DFUs) in a group of diabetic patients who were treated in the diabetic foot clinic of King Abdulaziz University, Jeddah, Saudi Arabia. Five consecutive patients who presented with large, hard to heal neuropathic ulcer for an average duration of 162.2 weeks were treated with multiple applications of Apligraf and followed up for 40 weeks. Three out of the five ulcers (60%) ended up with complete wound closure. One plantar ulcer healed partially and another plantar ulcer healed after 14 weeks but recurred after 10 weeks of wound closure due to infection. This small case series study indicates the importance of careful patient selection in healing chronic (DFUs) when using a skin substitute like Apligraf. Long standing large plantar ulcer in a non-complaint diabetic patient is the most difficult to heal and this should be kept in mind when using this relatively high cost modality of treatment.

Bullying among medical students in a Saudi medical school
Hasan Alzahrani
BMC Research Notes , 2012, DOI: 10.1186/1756-0500-5-335
Abstract: A cross-sectional questionnaire survey was conducted on a group of 542 clinical years’ medical students in a Saudi medical school to explore students' perceptions of their educational environment including exposure to different kinds of bullying. Bullying was defined as “a “persistent behaviour against a medical student that is intimidating, degrading, offensive or malicious and undermines the confidence and self- esteem of the recipient”. Results revealed that more than one quarter (28.0%) of the surveyed students reported exposure to some sort of bullying during their clinical. Ninety percent of the reported insults were verbal, 6% sexual and 4% physical. Males were more exposed but difference was not statistically significant.Bullying among Saudi medical students is an existing problem. A policy against bullying and harassment should be adopted in all of medical colleges to monitor this phenomenon and support students who have been bullied.Bullying, harassment and intimidation of medical students can poison the educational environment. Bullying and sexual harassment of medical students by their teachers appears to be widespread globally. Several studies from various countries have shown that bullying, harassment, abuse or belittlements are a regular phenomenon faced by medical students [1-5]. No medical school is immune, irrespective of geographical location or cultural background [1,2]. In Pakistan [1], Ahmer et al. conducted a cross- sectional questionnaire survey on bullying of final year medical students in six medical colleges and found that 52% of respondents reported that they had faced bullying or harassment during their medical education, about 28% of them experiencing it once a month or even more frequently. The overwhelming form of bullying had been verbal abuse (57%), and consultants were the most frequent (46%) perpetrators [1]. In a Jordanian study, 61% of the students had experienced at least one form of mistreatment; as (52%) were exposed to verba
Resistin : Can we resist its role in insulin resistance?
Alzahrani Ali
Annals of Saudi Medicine , 2005,
Abstract:
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