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Occupational injuries and burn out among orthopedic oncology surgeons

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World Journal of Orthopedics 2022年第12期13卷 1056-1063页

作者： abdulrahman m alaseem Robert E Turcotte Nathalie Ste-marie mohammad m Alzahrani Saad m Alqahtani Krista A Goulding Department of Orthopedic Surgery College of MedicineKing Saud UniversityRiyadh 12372Saudi Arabia Department of Orthopedic Surgery McGill University Health CentreMontreal H4A3J1Canada Department of Orthopedic Surgery College of MedicineImam Abdulrahman Bin Faisal universityDammam 34212Saudi Arabia Department of Orthopaedic Surgery Mayo ClinicPhoenixArizona 85054USA

BACKGROUND Orthopedic oncology surgeons commonly engage in prolonged and complex surgical *** types of surgeries increase the risk of physical and psychological stressors,which may in turn make these physicians prone to workrelated occupational *** The aim of this study was to explore in orthopedic oncologists,the prevalence of work-related physical injuries and psychological *** A modified version of the physical discomfort survey was developed to assess occupational injuries among orthopedic oncology surgeon members of the musculoskeletal Tumor Society,the Canadian Orthopedic Oncology Society and European musculoskeletal Oncology *** survey was sent by email,and it explored musculoskeletal complaints,psychological disturbances,treatment required for these complaints and the requirement of time off *** A total of 67 surgeon responses were collected.A high number of orthopedic oncologists(84%)reported an occupational *** back pain(39%)was the most prevalent musculoskeletal condition,followed by lumbar disk herniation(16%),shoulder tendinitis(15%)and lateral epicondylitis(13%).Of the cohort,46%required surgery and 31%required time off work due to their ***-three respondents reported a psychological ***(27%),anxiety(20%)and insomnia(20%)were the most commonly *** required off work due to injury was associated with old age and years in *** Orthopedic oncology surgeons report a high prevalence of work-related *** back related injury and burnout were the most reported *** operative room ergonomics and prevention of stress related to the work environment should be areas to explore in upcoming research.

关键词： Orthopedic oncology Surgeons Occupational musculoskeletal Injuries

Implications of Onshore Development on Global Software Engineering

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Computers, materials & Continua 2023年第2期74卷 3029-3044页

作者： abdulrahman m.Qahtani Ahmed S.Ghiduk College of Computers and Information Technology Taif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of mathematics and Computer Science Faculty of ScienceBeni-Suef UniversityBeni-Suef62521Egypt

Recently software industry has paid significant attention to customizing software products across distributed *** the requirements of multiple clients across distributed borders is a crucial challenge for the software customization *** decision-making and local development at the client site are considered methods for reducing difficulties in communicating the requirements of multiple clients across distributed *** paper introduces a new model called the onshore development model(ODm)for accomplishing the customization requests in the distributed development process of *** model presents a scenario for enhancing the onsite development of specific requirements to reduce delays andmisunderstandings between the clients and the team *** model depends on moving the development process to the client’s *** empirical studies were conducted to evaluate the proposed model to measure its productivity,time performance,and cost *** proposed model has been compared with two other models:the basic model(Bm),which allocates the decision-making process and the development process for teams at the vendor’s location,and the local decision-making model(LDec),which assigns the decision-making process for team at the client’s *** results of the empirical studies showed significant outperforming of the proposed model over the basic model and local decision-making model in productivity,time performance,and cost *** productivity of the proposed model improved by 39%and 10%more than the basic model and the local decision-making model,*** addition,the time performance of the proposed model became faster by 49%and 20.8%than the basic model and the local decision-making model,***,it reduced the total cost of the development process by 31%in terms of the salaries of all persons involved in requirements collecting,decision-making,and development.

关键词： Distributed development local development software customization

Resolution of an esophageal leak and posterior gastric wall necrosis with esophageal self-expandable metal stents

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World Journal of Gastroenterology 2013年第40期19卷 6931-6933页

作者： majid A Almadi abdulrahman m Aljebreen Fahad Bamihriz Division of Gastroenterology King Khalid University Hospital King Saud University Riyadh 11461Saudi Arabia Division of Gastroenterology The McGill University Health Center montreal General Hospital McGill UniversityMontrealH3G 1A4Canada Division of Surgery King Khalid University HospitalKing Saud UniversityRiyadh 11461Saudi Arabia

The use of weight reduction surgeries has increased over the years with a higher proportion of these surgeries being sleeve gastrectomies,this has been associated with some complications including staple line *** report a 32-year-old male who had undergone a laparoscopic gastric band surgery and subsequently a laparoscopic sleeve gastrectomy,this was complicated by both an staple line leak at the gastroesophageal junction as well as a large(> 4 cm) posterior gastric wall defect due to gastric wall necrosis. We used two co-axially inserted self-expandable stents(SEmS) in the management of this patient,5 stents were used over repeated endoscopy sessions and 20 wk. Both defects had resolved without the need for surgical *** is the first reported case were SEmS are used for both a staple line leak as well as a gastric wall *** also review the literature on the use of SEmS in the management of leaks post weight reduction surgeries.

关键词： Stents Self-expandable metal stents Laparoscopic sleeve gastrectomy Staple line leak Esophageal leak Gastric necrosis

Overflow phenomenon in serum lutein after supplementation:a systematic review supported with SNPs analyses

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International Journal of Ophthalmology(English edition) 2021年第7期14卷 1114-1119页

作者： abdulrahman m Alharbi mohammed A Kilani Tos TJm Berendschot Clinical Biochemistry Unit Department of Pathology and Laboratory MedicineCollege of MedicineKing Saud UniversityRiyadh 11451Saudi Arabia Public Health Authority of Saudi Arabia Riyadh 13352Saudi Arabia University Eye Clinic Maastricht University Medical CenterMaastricht 6229HXThe Netherlands

Lutein,a type of carotenoids,is found to delay the onset and progression of age-related macular degeneration(AmD).Several lutein supplementation studies showed that after an initial increase,lutein serum levels demonstrated a subsequent decrease despite continuous *** this systematic literature review,this obscure phenomenon was tried to be *** subsequent drop in lutein levels was postulated due to down-regulation of lutein receptors scavenger receptor class B typeⅠ(SR-BI)in the gastrointestinal tract,upregulation of lutein degrading enzymeβ-carotene dioxygenase(BCDO2),or perhaps a combination of *** single nucleotides polymorphisms(SNPs)that could have influence on the occurrence of this *** date,an exact scientific explanation for this phenomenon has not been *** research is needed to investigate this phenomenon in depth to reach an irrefutable explanation,giving that lutein is proven to be effective in delaying the onset and progression of AmD and its metabolism in the human body becomes of equal importance.

关键词： lutein macular degeneration carotenoids xanthophylls β-carotene dioxygenase scavenger receptor class B typeⅠ

Sedated vs unsedated colonoscopy:A prospective study

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World Journal of Gastroenterology 2014年第17期20卷 5113-5118页

作者： abdulrahman m Aljebreen majid A Almadi Felix W Leung Gastroenterology Division King Khalid University HospitalKing Saud UniversityRiyadh 11461Saudi Arabia Gastroenterology Division McGill University Health Center mcGill University MontrealQuebec H3G 1A4Canada Research and medical Services Sepulveda Ambulatory Care CenterVeterans Affairs Greater Los Angeles Healthcare Systemand David Geffen School of Medicine at UCLALos AngelesCaliforniaCA 91343United States

AIm:To compare sedated to unsedated colonoscopy in terms of duration,pain and the patient’s willingness to repeat the ***:Consecutive patients who underwent colonoscopies over a 2-year period were invited to *** patients who were to undergo our endoscopy unit were offered sedation with standard intravenous sedatives and analgesics,or an unsedated colonoscopy was *** details were *** patient anxiety level prior to the procedure,time to reach the cecum,total discharge time,patient and endoscopist pain assessments,satisfaction after the examination and the patient’s willingness to return for the same procedure in the future were ***:Among the 403 observed patients,more males were observed in the unsedated group(66.2%vs 55.2%,P=0.04).Additionally,the unsedated group patients were less anxious prior to the procedure(5.1vs 6.0,Pmpletion rates were comparable between the 2 groups(85.9%vs84.2%,P=0.66).The time to reach the cecum was also comparable(12.2 min vs 11.8 min);however,the total discharge times were shorter in the unsedated group(20.7 min vs 83.0 min,Pmoreover,the average patient pain score(3.4 vs 5.7,Pms of willingness to repeat the procedure if another was required in the future(83.3%vs 77.3%,P=0.17).CONCLUSION:Unsedated colonoscopy is feasible in willing *** option saves the endoscopy units up to one hour per patient and does not affect the patient willingness to return to the same physician again for additional colonoscopies if a repeated procedure is needed.

关键词： Sedation Colonoscopy Unsedated Screening Endoscopy

Forecasting E-Commerce Adoption Based on Bidirectional Recurrent Neural Networks

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Computers, materials & Continua 2022年第3期70卷 5091-5106页

作者： Abdullah Ali Salamai Ather abdulrahman Ageeli El-Sayed m.El-kenawy Community college Jazan UniversityJazanKingdom of Saudi Arabia Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt

E-commerce refers to a system that allows individuals to purchase and sell things *** primary goal of e-commerce is to offer customers the convenience of not going to a physical store to make a *** will purchase the item online and have it delivered to their home within a few *** goal of this research was to develop machine learning algorithms that might predict e-commerce platformsales.A case study has been designed in this paper based on a proposed continuous Stochastic Fractal Search(SFS)based on a Guided Whale Optimization Algorithm(WOA)to optimize the parameter weights of the Bidirectional Recurrent Neural Networks(BRNN).Furthermore,a time series dataset is tested in the experiments of e-commerce demand ***,the results were compared to many versions of the state-of-the-art optimization techniques such as the Particle Swarm Optimization(PSO),Whale Optimization Algorithm(WOA),and Genetic Algorithm(GA).A statistical analysis has proven that the proposed algorithm can work significantly better by statistical analysis test at the P-value less than 0.05 with a one-way analysis of variance(ANOVA)test applied to confirm the performance of the proposed ensemble *** proposed Algorithm achieved a root mean square error of RmSE(0.0000359),mean(0.00003593)and Standard Deviation(0.000002162).

关键词： Neural networks e-commerce forecasting risk management machine learning

Seroprevalence of celiac disease among healthy adolescents in Saudi Arabia

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World Journal of Gastroenterology 2013年第15期19卷 2374-2378页

作者： abdulrahman m Aljebreen majid A Almadi Alwaleed Alhammad Faleh Z Al Faleh Gastroenterology Division King Khalid University HospitalKing Saud University Gastroenterology Division McGill University Health CenterMontreal General HospitalMcGill University Immunology Unit Department of PathologyKing Saud University

AIm: To identify the seroprevalence of celiac disease among healthy Saudi adolescents. mETHODS: Between December 2007 and January 2008, healthy students from the 10th to 12th grades were randomly selected from three regions in Saudi Arabia. These regions included the following: (1) Aseer region, with a student population of 25512; (2) madinah, with a student population of 23852; and (3) Al-Qaseem, with a student population of 16067. Demographic data were recorded, and a venous blood sample (5-10 mL) was taken from each student. The blood samples were tested for immunoglobulin A and immunoglobulin G endomysial antibodies (EmA) by indirect ***: In total, 1167 students (614 males and 553 females) from these three regions were randomly selected. The majority of the study population was classified as lower middle class (82.7%). There were 26 (2.2%) students who had a positive anti-EmA test, including 17 females (3.1%) and 9 males (1.5%). Al-Qaseem region had the highest celiac disease prevalence among the three studied regions in Saudi Arabia (3.1%). The prevalence by region was as follows: Aseer 2.1% (10/479), madinah 1.8% (8/436), and Al-Qaseem 3.2% (8/252). The prevalence in madinah was significantly lower than the prevalence in Aseer and Al-Qaseem (P=0.02). CONCLUSION: Our data suggest celiac disease prevalence might be one of the highest in the world. Further studies are needed to determine the real prevalence.

关键词： Celiac disease Saudi Arabia Prevalence Antiendomysial antibody Epidemiology

Design and experimental validation of looped-tube thermoacoustic engine

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Journal of Thermal Science 2011年第5期20卷 423-429页

作者： abdulrahman S. Abduljalil Zhibin Yu Artur J. Jaworski University of manchester School of MACE Sackville Street Manchester M13 9PL UK University of Leicester Department of Engineering University Road Leicester LE1 7RH UK

The aim of this paper is to present the design and experimental validation process for a thermoacoustic looped-tube engine. The design procedure consists of numerical modelling of the system using DELTA EC tool, Design Environment for Low-amplitude ThermoAcousfic Energy Conversion, in particular the effects of mean pressure and regenerator configuration on the pressure amplitude and acoustic power generated. This is followed by the construction of a practical engine system equipped with a ceramic regenerator - a substrate used in auto- motive catalytic converters with fine square channels. The preliminary testing results are obtained and compared with the simulations in *** measurement results agree very well on the qualitative level and are reasonably close in the quantitative sense.

关键词： Thermoacoustic engine looped tube modelling simulation

Linear Active Disturbance Rejection Control with a Fractional-Order Integral Action

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Computers, materials & Continua 2022年第11期73卷 3057-3079页

作者： maâmar Bettayeb Rachid mansouri Ubaid m.Al-Saggaf abdulrahman U.Alsaggaf mohammed moinuddin Electrical Engineering Department University of SharjahUnited Arab Emirates L2CSP Laboratory University Mouloud Mammeri of Tizi-OuzouAlgeria Center of Excellence in Intelligent Engineering Systems(CEIES) King Abdulaziz UniversityJeddahSaudi Arabia Electricaland Computer Engineering Department King Abdulaziz UniversityJeddahSaudi Arabia

Linear active disturbance rejection control(LADRC)is a powerful control structure thanks to its performance in uncertainties,internal and external disturbances estimation and *** extended state observer(ESO)based controller is the key to the LADRC *** this article,the LADRC scheme combined with a fractional-order integral action(FOILADRC)is proposed to improve the robustness of the standard *** the robust closed-loop Bode’s ideal transfer function(BITF),an appropriate pole placement method is proposed to design the set-point tracking controller of the FOI-LADRC *** simulations and experimental results on a cart-pendulum system will illustrate the effectiveness of the proposed FOI-LADRC scheme for the disturbance rejection,the set-point tracking and the improved *** illustrate the LADRC control schemes and to verify the performance of the proposed FOI-LADRC,compared to the standard LADRC and IOI-LADRC structures,two tests will be carried ***,simulation tests on an academic example will be presented to show the effect of the different parameters of the control law on the performance of the closed-loop ***,these three control structures are implemented on an experimental test bench,the cart-pendulum system,to show their efficiency and to show the superiority of the proposed method compared to the two other structures.

关键词： Fractional calculus active disturbance rejection control pole placement cart-pendulum system robust control