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Injury Pattern among Road Traffic Accidents’ Victims in Najran City, Saudi Arabia

International Journal of Clinical Medicine 2018年第4期9卷 270-280页

作者： mahdi yahya al-zamanan Abdullah Saleh al-Yami ali Abdullah al-Najrani Mansour Yousef al-Asmari Abdulrahman alamri Manaa Awad Mohammed al-Qahtani Mohammed Helmy Faris Shalayel Abdulhadi Mohamed Elbashir Saeed ali alsareii College of Medicine Najran University Najran Saudi Arabia Department of Surgery College of Medicine Najran University Najran Saudi Arabia Department of Surgery College of Medicine Najran University Najran Saudi Arabia Department of Family and Community Medicine College of Medicine Najran University Najran Saudi Arabia

Traffic accidents constitute the substantial cause of disability and mortality in the young Saudi individuals reaching horrible figures. The aim of this study was to review and identify the pattern of injury among road traffic accident (RTA) victims as well as the peak time of accidents and their implications. This retrospective hospital-based cross-sectional study was carried out in the period between April 2016 to March 2017 in King Khalid Hospital, Maternity and Children Hospital and Najran General Hospital, Najran, Saudi Arabia. all RTA victims admitted to the emergency departments of the pre-mentioned hospitals. Data collected from 435 Saudis and non-Saudis’ files were statistically analyzed with regard to age, gender, the timing of road traffic accidents, injury pattern, and neurological deficits incidence. Most of the RTAs’ cases (92%) were male victims with the highest peak in the age group 20 - 29 years. 58% of the RTAs happened in the evening (6:00 PM-9:00 PM) while 20% occurred in the morning. Head injury represented the most frequent pattern (36%) followed by the spinal injury (23%), lower limb injury (23%), upper limb injury (20%), thoracic injury (17%), pelvic injury and abdominal injury (8%). 4.4% of RTAs resulted in death whilst 9% of cases experienced neurological deficits. In conclusion, young male drivers in Najran recorded the highest frequency of RTAs. Initiation of road safety education and expansion of speed detectors (Saher) system deployment is highly recommended.

关键词： Road Traffic Accidents (RTA) Road Traffic Injuries (RTIs) Disability

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3D-Printed MOF Monoliths:Fabrication Strategies and Environmental Applications

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Nano-Micro Letters 2024年第12期16卷 358-405页

作者： Hossein Molavi Kamyar Mirzaei mahdi Barjasteh Seyed yahya Rahnamaee Somayeh Saeedi aliakbar Hassanpouryouzband Mashallah Rezakazemi Department of Chemistry Institute for Advanced Studies in Basic Science(IASBS)Zanjan 45137-66731Iran Department of Chemical and Biological Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260USA Center for Nano-Science and Nanotechnology Institute for Convergence Science&TechnologySharif University of TechnologyTehran 15614Iran Department of Biomedical Engineering Amirkabir University of Technology(Tehran Polytechnic)Hafez Ave.P.O.Box 15875-4413TehranIran Grant Institute School of GeosciencesUniversity of EdinburghWest Main RoadEdinburgh EH93FEUK Faculty of Chemical and Materials Engineering Shahrood University of TechnologyShahroodP.O.Box ***Iran

Metal-organic frameworks(MOFs)have been extensively considered as one of the most promising types of porous and crystalline organic-inorganic materials,thanks to their large specific surface area,high porosity,tailorable structures and compositions,diverse functionalities,and well-controlled pore/size ***,most developed MOFs are in powder forms,which still have some technical challenges,including abrasion,dustiness,low packing densities,clogging,mass/heat transfer limitation,environmental pollution,and mechanical instability during the packing process,that restrict their applicability in industrial ***,in recent years,attention has focused on techniques to convert MOF powders into macroscopic materials like beads,membranes,monoliths,gel/sponges,and nanofibers to overcome these ***-dimensional(3D)printing technology has achieved much interest because it can produce many high-resolution macroscopic frameworks with complex shapes and geometries from digital ***,this review summarizes the combination of different 3D printing strategies with MOFs and MOF-based materials for fabricating 3D-printed MOF monoliths and their environmental applications,emphasizing water treatment and gas adsorption/separation ***,the various strategies for the fabrication of 3D-printed MOF monoliths,such as direct ink writing,seed-assisted in-situ growth,coordination replication from solid precursors,matrix incorporation,selective laser sintering,and digital light processing,are described with the relevant ***,future directions and challenges of 3D-printed MOF monoliths are also presented to better plan future trajectories in the shaping of MOF materials with improved control over the structure,composition,and textural properties of 3D-printed MOF monoliths.

关键词： MOFs 3D-printing Environmental remediation Shaping Monoliths

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Thyroglossal Duct Anomalies in Pediatric and Adult Population: A 10-Year Experience in a Tertiary Care Hospital

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Surgical Science 2021年第7期12卷 226-235页

作者： Montasir Junaid Ghaleb al-Sayed Sayed Agha ali Shah Hareem U. Khan ali mahdi al Qannass Nadeem W. Malik yahya al Kahtani Ahmed Arghabi Abdul Aziz ali Binhossan Sadaf Qadeer Ahmed Department of Otolaryngology-Head and Neck Surgery Armed Forces Hospital Khamis Mushait KSA Department of Pathology Armed Forces Hospital Khamis Mushait KSA Department of Otolaryngology-Head and Neck Surgery Stanford University Palo Alto USA Department of Otolaryngology-Head and Neck Surgery Sir Syed University of Medical Sciences for Girls Karachi Pakistan

Introduction: Thyroglossal duct cyst is a well-recognized congenital midline neck swelling observed in early childhood and rarely in adults. It may reveal itself as a painless cyst, abscess, or as fistula. Several studies have been conducted across the world, but the literature is scarce on its presentation and complications in the Middle East. This indexing study aims to report a 10-year experience with thyroglossal duct cyst (TGDC) presentation, excision, and recurrence at a teaching hospital in Saudi Arabia (KSA). Methods: A retrospective chart review was conducted at the Armed Forces Hospital Southern Region, KSA from December 2008 to December 2018. Data were retrieved from the electronic medical record system of the hospital and validated with the histopathology records. A total of 48 patients diagnosed as TGDC, sinus or fistula were identified. Stata ver. 16.1 was used to analyze the data and results formulated using regression model and Pearson’s chi-square test. Results: The majority of our patients were female (60.4%), and the most common presentation was a midline neck swelling which moved with tongue protrusion. Surgical excision via Complete Sistrunk procedure was the operation of choice in 60.5% followed by excision of the cyst with tract and sinus tract. Previous infection and surgical history contributed to complications in our patients, but no association of age or gender was observed. Patients presenting with infected and discharging cysts were found to be much more likely to develop a recurrence (9 patients). Cysts deep to the hyoid showed more recurrence [n = 7 (78%)] compared to superficial cysts [n = 2 (22%)] and posterior and multi-tract lesions also showed significant recurrence. Conclusion: Despite being a common cause of neck swelling, thyroglossal duct cyst is often missed on physical exams. To reduce complications, timely diagnosis and treatment are necessary.

关键词： Midline Neck Swelling Thyroglossal Duct Cyst Sinus Tract Sistrunk Procedure

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Broad bandwidth SOA-based multiwavelength laser incorporating a bidirectional Lyot filter

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Chinese Optics Letters 2018年第9期16卷 22-26页

作者： Abdul Hadi Sulaiman Muhammad Zamzuri Abdul Kadir Nelidya Md Yusoff Noran Azizan Cholan Fairuz Abdullah Ahmad Fauzi Abas Mohammed Thamer alresheedi Mohd Adzir mahdi Wireless and Photonic Networks Research Center Faculty of Engineering University Putra Malaysia 43400 UPM Serdang Malaysia Institute of Power Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Malaysia Department of Physics Kulliyyah of Science International Islamic University Malaysia 25710 Kuantan Malaysia Razak School of Engineering & Advanced Technology Universiti Teknologi Malaysia Kuala Lumpur Jalan Sultan Yahya Petra 54100 Kuala Lumpur Malaysia Department of Communication Engineering Faculty of Electrical and Electronics Engineering Universiti Tun Hussein Onn Malaysia 86400 Batu Pahat Malaysia Department of Electrical Engineering College of Engineering King Saud University Riyadh 11421 Saudi Arabia

We demonstrate a broad bandwidth multiwavelength laser based on a bidirectional Lyot filter and a semiconductor optical amplifier with a mechanism of intensity-dependent loss as the flatness agent. A wide bandwidth of a multiwavelength spectrum of 32.9 nm within a 5 dB uniformity is obtained under optimized polarization param- eters. For this case, the number of generated lasing lines is 329 with a fixed wavelength separation of 0.1 nm. The power stability of this multiwavelength laser is less than 1.35 dB within 200 min time frame. This shows that the bidirectional Lyot filter provides an alternative option for multiwavelength generation in laser systems.

关键词： SOA Broad bandwidth SOA-based multiwavelength laser incorporating a bidirectional Lyot filter PMF HWP

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