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Advances in orthodontic clear aligner materials

Bioactive Materials 2023年第4期22卷 384-403页

作者： Yashodhan M.Bichu abdulraheem alwafi Xiaomo Liu James Andrews Bjorn Ludwig Aditi Y.Bichu Bingshuang Zou Private Practice Abu DhabiUnited Arab Emirates Department of Oral Health Science Faculty of DentistryUniversity of British ColumbiaVancouverCanada Faculty of Dentistry Department of Dental Public HealthKing Abdulaziz UniversityJeddahSaudi Arabia Department of Orthodontics Peking University School and Hospital of StomatologyBeijingChina Private Practice PerthAustralia Department of Orthodontics University of HomburgSaarGermany

Rapid technological improvements in biomaterials,computer-aided design(CAD)and manufacturing(CAM)have endorsed clear aligner therapy(CAT)as a mainstay of orthodontic treatment,and the materials employed for aligner fabrication play an all-important role in determining the clinical performance of clear *** narrative review has attempted to comprehensively encompass the entire gamut of materials currently used for the fabrication of clear aligners and elucidate their characteristics that are crucial in determining their performance in an oral *** developments and current protocols in aligner fabrication,features of contemporary bioactive materials,and emerging trends related to CAT are *** in aligner material chemistry and engineering possess the potential to bring about radical transformations in the therapeutic applications of CAT;in the absence of which,clear aligners would continue to underperform clinically,due to their inherent biomechanical ***,while innovations in aligner materials such as shape memory polymers,direct three-dimensional(3D)printed clear aligners and bioactive materials combined with clear aligner materials are essential to further advance the applications of CAT;increased awareness of environmental responsibilities among aligner manufacturers,aligner prescribing clinicians and aligner users is essential for better alignment of our climate change goals towards a sustainable planet.

关键词： Clear aligners Bioactive materials Shape memory polymers Direct 3D printing Environment Review

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Performance Comparison of Hyper-V and KVM for Cryptographic Tasks in Cloud Computing

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Computers, Materials & Continua 2024年第2期78卷 2023-2045页

作者： Nader Abdel Karim Osama A.Khashan Waleed K.abdulraheem Moutaz Alazab Hasan Kanaker Mahmoud E.Farfoura Mohammad Alshinwan Department of Intelligent Systems Faculty of Artificial IntelligenceAl-Balqa Applied UniversityAl-Salt1705Jordan Research and Innovation Centers Rabdan AcademyP.O.Box 114646Abu DhabiUnited Arab Emirates Department of Information Systems and Networks TheWorld Islamic Sciences and Education UniversityAmman11947Jordan Department of Cyber Security Isra UniversityAmman1162Jordan Faculty of Science and Information Technology Al-Zaytoonah University of JordanAmman11733Jordan Middle East University Research Unit Middle East UniversityAmman11831Jordan

As the extensive use of cloud computing raises questions about the security of any personal data stored there,cryptography is being used more frequently as a security tool to protect data confidentiality and privacy in the cloud environment.A hypervisor is a virtualization software used in cloud hosting to divide and allocate resources on various pieces of *** choice of hypervisor can significantly impact the performance of cryptographic operations in the cloud *** important issue that must be carefully examined is that no hypervisor is completely superior in terms of performance;Each hypervisor should be examined to meet specific *** main objective of this study is to provide accurate results to compare the performance of Hyper-V and Kernel-based Virtual Machine(KVM)while implementing different cryptographic algorithms to guide cloud service providers and end users in choosing the most suitable hypervisor for their cryptographic *** study evaluated the efficiency of two hypervisors,Hyper-V and KVM,in implementing six cryptographic algorithms:Rivest,Shamir,Adleman(RSA),Advanced Encryption Standard(AES),Triple Data Encryption Standard(TripleDES),Carlisle Adams and Stafford Tavares(CAST-128),BLOWFISH,and *** study’s findings show that KVM outperforms Hyper-V,with 12.2%less Central Processing Unit(CPU)use and 12.95%less time overall for encryption and decryption operations with various file *** study’s findings emphasize how crucial it is to pick a hypervisor that is appropriate for cryptographic needs in a cloud environment,which could assist both cloud service providers and end *** research may focus more on how various hypervisors perform while handling cryptographic workloads.

关键词： Cloud computing performance virtualization hypervisors Hyper-V KVM cryptographic algorithm

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尼日利亚Gwagwalada原发性开角型青光眼患者的社会人口学和临床特征

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国际眼科杂志 2024年第7期24卷 1005-1012页

作者： Abdulkabir Ayansiji Ayanniyi abdulraheem Olarongbe Mahmoud Yetunde Olamide JohnSam Rauf Ibrahim Rauf David Paul Ejeba Rosita Ujunwa Akasike-Enuh Emmanuel Oluwatosin Bisiriyu Margaret Uche Afam-Osemene Eunice Adamma Chijioke Pankyes Amos Damter Nkosi Linus Agwadu 阿布贾大学眼科尼日利亚阿布贾902101 阿布贾教学医院眼科尼日利亚Gwagwalada902101 伊洛林大学眼科尼日利亚伊洛林240003 阿布贾大学统计学教研室尼日利亚阿布贾902101

目的:探讨比较尼日利亚Gwagwalada原发性开角型青光眼(POAG)与非青光眼患者的临床社会人口学特征。方法:横断面对比研究。共调查235例成年患者,其中96例POAG及139例非青光眼。记录患者年龄、性别、教育程度、职业、种族、青光眼家族史... 详细信息

目的:探讨比较尼日利亚Gwagwalada原发性开角型青光眼(POAG)与非青光眼患者的临床社会人口学特征。方法:横断面对比研究。共调查235例成年患者,其中96例POAG及139例非青光眼。记录患者年龄、性别、教育程度、职业、种族、青光眼家族史、眼痒、糖尿病和高血压情况。眼部检查包括视力、中央视野、杯盘比、前房角评估和眼压。结果:平均年龄为49.88±13.75岁,其中男114例(48.5%)。POAG患者包括42个种族,其中伊博人(24/96,25.0%)和约鲁巴人(20/96,20.8%)最为常见。大多数POAG(74/96,77.1%)年龄在40-69岁之间。POAG(73/96,76.0%)有不同程度的视力障碍。POAG组与非青光眼组的对比如下:青光眼阳性家族史(34/96,35.4%)vs(25/139,18.0%;P=0.012);糖尿病史(8/96,8.3%)vs(6/139,4.3%);高血压病史(24/96,25.0%)vs(28/139,20.1%);糖尿病合并高血压病史(1/96,1.0%)vs(4/139,2.9%;P=0.268);使用抗糖尿病药物者(5/96,5.2%)vs(7/139,5.0%);使用降压药者(24/96,25.0%)vs(23/139,16.5%);联合使用抗糖尿病和抗高血压药物者(4/96,4.2%)vs(5/139,3.6%;P=0.328);有眼痒症状者(18/96,18.7%)vs(37/139,26.6%;P=0.328);视力障碍[右眼(RE):51/96,53.1%;左眼(LE):60/96,62.5%]vs(RE:40/139,28.7%;LE:37/139,26.6%;P=0.000);垂直杯盘比>0.4(RE:96/96,100%;LE:96/96,100%)vs(RE:131/139,94.2%;LE:124/139,89.2%)(RE:P=0.307;LE:P=0.006);眼压>22 mmHg(RE:17/96,17.7%;LE:22/96,22.9%)vs(RE:2/139,1.4%;LE:2/139,1.4%;P=0.006)。大多数POAG患者(60/96,62.5%)正在服用抗青光眼药物,(23/96,24.0%)尚未开始用药,P=0.000。许多POAG(32/96,33.3%)正在服用β受体阻滞剂、前列腺素抑制剂和碳酸酐酶抑制剂的联合抗青光眼药物。结论:青光眼具有与其他眼部疾病不同的临床社会人口学特征。许多参与者肯定了青光眼的家族史,大多数青光眼参与者正在接受抗青光眼治疗。包括失明在内的视力障碍与青光眼显著相关。该研究证实,开角型青光眼与高杯盘比和高眼内压有关。

关键词：原发性开角型青光眼尼日利亚青光眼社会人口学

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Injections Attacks Efficient and Secure Techniques Based on Bidirectional Long Short Time Memory Model

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Computers, Materials & Continua 2023年第9期76卷 3605-3622页

作者： Abdulgbar A.R.Farea Gehad Abdullah Amran Ebraheem Farea Amerah Alabrah Ahmed A.abdulraheem Muhammad Mursil Mohammed A.A.Al-qaness School of Big Data&Software Engineering Chongqing UniversityChongqing401331China Department of Management Science Engineering Dalian University of TechnologyDalian116024China Software College Northeastern UniversityShenyang110169China Department of Information Systems College of Computer and Information ScienceKing Saud UniversityRiyadh11543Saudi Arabia Department of Management Science and Engineering South China University of TechnologyGuangzhou510641China Department of Computer Engineering and Mathematics University of Rovira i VirgiliTarragonaSpain College of Physics and Electronic Information Engineering Zhejiang Normal UniversityJinhua321004China

E-commerce,online ticketing,online banking,and other web-based applications that handle sensitive data,such as passwords,payment information,and financial information,are widely *** web developers may have varying levels of understanding when it comes to securing an online *** Query language SQL injection and cross-site scripting are the two vulnerabilities defined by the OpenWeb Application Security Project(OWASP)for its 2017 Top Ten List Cross Site Scripting(XSS).An attacker can exploit these two flaws and launch malicious web-based actions as a result of these *** published articles focused on these attacks’binary *** article described a novel deep-learning approach for detecting SQL injection and XSS *** datasets for SQL injection and XSS payloads are combined into a single *** dataset is labeledmanually into three labels,each representing a kind of *** work implements some pre-processing algorithms,including Porter stemming,one-hot encoding,and the word-embedding method to convert a word’s text into a *** model used bidirectional long short-term memory(BiLSTM)to extract features automatically,train,and test the payload *** payloads were classified into three types by BiLSTM:XSS,SQL injection attacks,and *** outcomes demonstrated excellent performance in classifying payloads into XSS attacks,injection attacks,and non-malicious ***’s high performance was demonstrated by its accuracy of 99.26%.

关键词： Web security SQL injection XSS deep learning RNN LSTM BiLSTM

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Effect of K_(2)CO_(3) doping on CO_(2) sorption performance of silicate lithium-based sorbent prepared from citric acid treated sediment

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Chinese Journal of Chemical Engineering 2022年第11期51卷 10-20页

作者： Junya Wang Kai Chen Yi Wang Jiuming Lei Abdullah Alsubaie Ping Ning Shikun Wen Taiping Zhang abdulraheem S.AAlmalki AAlhadhrami Zhiping Lin Hassan Algadi Zhanhu Guo Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China Ecological Environment Monitoring Station Linxiang BranchLincang Municipal Bureau of Ecology and EnvironmentLincang 677000China Department of Physics College of KhurmaTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry Faculty of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Integrated Composites Laboratory(ICL) Department of Chemical and Bimolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996United States Department of Electrical Engineering Faculty of EngineeringNajran UniversityP.O.Box 1988Najran 11001Saudi Arabia College of Materials Science and Engineering Taizhou UniversityTaizhou 318000China

In this paper,a low-cost and environmental-friendly leaching agent citric acid(C_(6)H_(8)O_(7))was used to treat the sediment of Dianchi Lake(SDL)to synthesize lithium silicate(Li_(4)SiO_(4))based CO_(2)*** results were compared with that treated with strong ***,the effects of preparation conditions,sorption conditions and desorption conditions on the CO_(2)sorption performance of prepared Li_(4)SiO_(4)were systematically *** optimal conditions,the Li_(4)SiO_(4)sorbent was successfully synthesized and its CO_(2)sorption capacity reached 31.37%(mass),which is much higher than that synthesized from SDL treated with strong *** is speculated that the presence of some elements after C_(6)H_(8)O_(7)treatment may promote the sorption of synthetic Li_(4)SiO_(4)to CO_(2).In addition,after doping with K_(2)CO_(3),the CO_(2)uptake increases from the original 12.02%and 22.12%to 23.96%and 32.41%(mass)under the 20%and 50%CO_(2)partial pressure,*** importantly,after doping K_(2)CO_(3),the synthesized Li_(4)SiO_(4)has a high cyclic stability under the low CO_(2)partial pressure.

关键词： CO_(2)sorbents Li_(4)SiO_(4) Sediment Citric acid Doped with K_(2)CO_(3)

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Optimizing the Synthesis of Ethyl tert-Butyl Ether in Continuous Catalytic Distillation Column Using New Ion Exchange Resin Catalyst

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Chinese Journal of Chemical Engineering 2013年第10期21卷 1121-1128页

作者： Muhammad Umar Yahia Abubakar AI-Hamed abdulraheem AI-Zahrani Hisham Saeed Bamufleh Department of Chemical and Materials Engineering Faculty of Engineering King Abdul Aziz University Jeddah80204 Kingdom of Saudi Arabia

重要燃料之一的液体阶段合成氧化，乙醇 tert 丁基醚(ETBE ) ，从乙醇和 tert 丁基，酒精(TBA ) 用离子交换树脂催化剂 CT-145H 在催化蒸馏列(CDC ) 被学习了。有该土地所固有的 1.2 m 高度和 50 公里直径的包装 CDC 开发了反应的节收... 详细信息

重要燃料之一的液体阶段合成氧化，乙醇 tert 丁基醚(ETBE ) ，从乙醇和 tert 丁基，酒精(TBA ) 用离子交换树脂催化剂 CT-145H 在催化蒸馏列(CDC ) 被学习了。有该土地所固有的 1.2 m 高度和 50 公里直径的包装 CDC 开发了反应的节收拾行李被用来产生试验性的数据。在精华的产品纯净上的不同关键变量的效果，被调查发现最佳为 ETBE 操作条件合成。为 0.2 kg

关键词：乙基叔丁基醚树脂催化剂液相合成离子交换催化精馏疾病预防控制中心优化最佳条件

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Relationship between Whole Body Iodine-131 Effective Half-Life and Estimated Glomerular Filtration Rate for Papillary Thyroid Cancer Patients Undergoing Radioactive Iodine Therapy

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Journal of Applied Mathematics and Physics 2023年第8期11卷 2472-2479页

作者： Asim Abualnaja Hanaa Alsheikh Khaled Soliman Meshal Alnefaie abdulraheem Alsheri Medical Physics Department Prince Sultan Military Medical City Riyadh Saudi Arabia Radiodiagnostics and Medical Imaging Department Prince Sultan Military Medical City Riyadh Saudi Arabia

Background: The aim of this work was to examine the relationship between the estimated glomerular filtration rate (eGFR) as indicator of renal efficiency potentially related to the ability to release radioactive iodine from the patients bodies and the radioactive iodine whole body effective half-life (WBEHL) defined as the time taken for the administered activity to decay to half of its value for papillary thyroid cancer (PTC) patients undergoing radioactive iodine therapy (RAIT) in a tertiary care medical Centre. Methods: This retrospective observational study included seventy nine patients, sixty females and nineteen males. The patients were divided in two subgroups, those who have WBEHL of less than 11 hours (n = 51) and those with more than 11 (n = 28) hrs based on k-means clustering technique. Results: Analysis of variance (ANOVA) was used to find out if there is a statistically significant difference between the two subgroups Conclusion: There was not a statistically significant difference between the short and the longer WBEHL patients’ groups analyzed in this study. .

关键词： GFR Thyroid Cancer Radioactive Iodine Therapy Renal Function

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New insights into porosity determination using artificial intelligence techniques for carbonate reservoirs

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Petroleum 2018年第4期4卷 408-418页

作者： Salaheldin Elkatatny Zeeshan Tariq Mohamed Mahmoud Abdulazeez abdulraheem Department of Petroleum Engineering King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia Petroleum Engineering Department Cairo UniversityCairo Egypt Petroleum Engineering Department Suez UniversitySuezEgypt

The porosity of the petroleum reservoirs is considered one of the most important parameters in reserve estimation because it determines the effective volume of the hydrocarbon that is stored in the *** on the reserve estimation,the development plan can be set and *** can be determined in the laboratory which is the most expensive *** also can be determined from the logs such as density,neutron,sonic,and NMR *** are a lot of uncertainties in the porosity estimation from wireline logs because it depends on many statistical analysis and also is affected by the logging environment and logging *** prediction of the porosity from different porosity logs using artificial intelligence(AI)methods validated with the laboratory measured values is the best method to determine an accurate value of the rock *** objective of this research is to evaluate AI tools such as artificial neural network(ANN),Support vector machine(SVM)and Adaptive neuro fuzzy inference system(ANFIS)to predict the reservoir porosity based on wireline log *** than 1700 field measurements of porosity with logs data were used for training and testing the AI *** results obtained showed that ANN and ANFIS can be used to estimate the reservoir porosity based on log data with a high correlation coefficient(R)and low average absolute percentage error(AAPE).The main inputs required for porosity estimation are bulk density,neutron porosity,and sonic compressional *** developed mathematical equation based on the weights and bias of the ANN model can be used to predict the reservoir porosity based on log data with a correlation coefficient of 0.98 and an AAPE less than 8%.The advantage of this work is that we extracted the mathematical model from the ANN that can be used directly to determine the porosity without the need for training and testing the *** porosity estimation from the neutron-density crossplots,which is the current te

关键词： Porosity Artificial intelligence Neural network Carbonate reservoir Logging

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Time of surgery and surgeon level in supracondylar humerus fractures in pediatric patients:A retrospective study

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World Journal of Orthopedics 2023年第11期14卷 791-799页

作者： Ibrahim A Albrahim Ammar K AlOmran Dalal A Bubshait Yaser Tawfeeq Arwa Alumran Jaffar Alsayigh Ammar Abusultan abdulraheem Altalib Zaid A Alzaid Shayma S Alsubaie Mohammad M Alzahrani Department of Orthopedic College of MedicineImam Abdulrahman Bin Faisal UniversityDammam 34212Saudi Arabia Health Information Management and Technology College of Public HealthImam Abdulrahman Bin Faisal UniversityDammam 34212Saudi Arabia

BACKGROUND Supracondylar humerus fractures account for more than 60%of all elbow fractures and about 1/5 of all pediatric ***,these fractures can be associated with risk of complications including neurovascular injuries,malunions and limb *** exists regarding the effect of time of surgical intervention and/or level of surgeon performing the surgery on outcome of these *** To determine whether time of surgical intervention and/or surgeon level influence the outcomes of surgically managed pediatric supracondylar humerus *** We retrospectively studied 155 pediatric patients presenting with a supracondylar humerus fracture in a level 1 trauma center from January 2006 to December *** data extracted included demographic data,fracture characteristics,surgical data,and follow-up *** collected data was analyzed and P values of<0.05 were considered statistically *** Of the cohort,11%of patients had documented post-operative complications,of which the majority occurred in surgeries performed after day time working hours and in fractures requiring open *** the lowest complication rate was found in surgeries performed by pediatric orthopaedic surgeons,this did not reach statistical *** In pediatric patients undergoing surgery for supracondylar fractures,we found a higher complication rate when surgeries were not performed during working *** level and training had no significant effect on the risk of post-operative complications.

关键词： Supracondylar humerus Fracture Time of surgery Level Complications

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Stability of Collinear Points in the Generalized Photogravitational Robes Restricted Three-Body Problem

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International Journal of Astronomy and Astrophysics 2011年第1期1卷 6-9页

作者： AbdulRazaq abdulraheem Department of Mathematics Ahmadu Bello University Zaria

In studying the effects of radiation and oblateness of the primaries on the stability of collinear equilibrium points in the Robes restricted three-body problem we observed the variations of the density parameter k with the mass parameter μ for constant radiation and oblateness factors on the location and stability of the collin-ear points L1, L2and L3. It is also discovered that the collinear points are unstable for k > 0 and stable for k < 0.

关键词： Stability Collinear Points Robes Problem Density Parameters

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