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Predicting an Optimal Virtual Data Model for Uniform Access to Large Heterogeneous Data

Data Intelligence 2024年第2期6卷 504-530页

作者： Chahrazed B.Bachir Belmehdi Abderrahmane Khiat nabil keskes LabRI-SBA Enterprise Information SystemsESI-SBA InstituteFraunhofer IAISAlgeriaGermany

The growth of generated data in the industry requires new efficient big data integration approaches for uniform data access by end-users to perform better business *** virtualization systems,including Ontology-Based Data Access(ODBA)query data on-the-fly against the original data sources without any prior data *** approaches by design use a fixed model e.g.,TABULAR as the only Virtual Data Model-a uniform schema built on-the-fly to load,transform,and join relevant *** other data models,such as GRAPH or DOCUMENT,are more flexible and,thus,can be more suitable for some common types of queries,such as join or nested *** queries are hard to predict because they depend on many criteria,such as query plan,data model,data size,and *** address the problem of selecting the optimal virtual data model for queries on large datasets,we present a new approach that(1)builds on the principal of OBDA to query and join large heterogeneous data in a distributed manner and(2)calls a deep learning method to predict the optimal virtual data model using features extracted from SPARQL ***-implementation of our approach currently leverages state-of-the-art Big Data technologies,Apache-Spark and Graphx,and implements two virtual data models,GRAPH and TABULAR,and supports out-of-the-box five data sources models:property graph,document-based,e.g.,wide-columnar,relational,and tabular,stored in Neo4j,MongoDB,Cassandra,MySQL,and CSV *** experiments show that our approach is returning the optimal virtual model with an accuracy of 0.831,thus,a reduction in query execution time of over 40%for the tabular model selection and over 30%for the graph model selection.

关键词： Data Virtualization Big Data OBDA Deep Learning

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Gallbladder carcinoma in the era of artificial intelligence: Early diagnosis for better treatment

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 256-259页

作者： Ismail AS Burud Sherreen Elhariri nabil Eid Department of Surgery Clinical CampusIMU UniversitySeremban 70300Negeri SembilanMalaysia Department of Anatomy Division of Human BiologySchool of MedicineIMU UniversityKuala Lumpur 57000Kuala LumpurMalaysia

Gallbladder carcinoma(GBC)is the most common malignant tumor of biliary tract,with poor prognosis due to its aggressive nature and limited therapeutic *** detection of GBC is a major challenge,with most GBCs being detected accidentally during cholecystectomy procedures for gallbladder *** letter comments on the recent article by Deqing et al in the World Journal of Gastrointestinal Oncology,which summarized the various current methods used in early diagnosis of GBC,including endoscopic ultrasound(EUS)examination of the gallbladder for high-risk GBC patients,and the use of EUS-guided elasto-graphy,contrast-enhanced EUS,trans-papillary biopsy,natural orifice translu-minal endoscopic surgery,magnifying endoscopy,choledochoscopy,and confocal laser endomicroscopy when necessary for early diagnosis of ***,there is a need for novel methods for early GBC diagnosis,such as the use of artificial intelligence and non-coding RNA biomarkers for improved screening ***,the use of in vitro and animal models may provide critical insights for advancing early detection and treatment strategies of this aggressive tumor.

关键词： Gallbladder carcinoma Endoscopic ultrasound Biopsy Elastography Cho-ledochoscopy Artificial intelligence Non-coding RNAs Screening Animal models In vitro studies

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Enhancing metformin efficacy with cholecalciferol and taurine in diabetes therapy:Potential and limitations

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World Journal of Diabetes 2025年第1期16卷 22-26页

作者： Gehan El-Akabawy nabil Eid Department of Basic Medical Sciences College of MedicineAjman UniversityAjman 346United Arab Emirates Department of Anatomy Division of Human BiologySchool of MedicineIMU UniversityKuala Lumpur 57000Malaysia

Diabetes mellitus,particularly type 2 diabetes mellitus(T2DM),poses a significant global health *** management strategies primarily focus on glycemic control;however,there is a growing need for comprehensive approaches addressing the complex pathophysiology of diabetes *** recent study by Attia et al explores the potential of a novel therapy combining metformin with cholecalciferol(vitamin D3)and taurine to mitigate T2DM-related complications in a rat *** findings indicate that this treatment combination improves glycemic control and reduces oxidative stress,inflammation,and lipid ***,the study is limited by a lack of safety profile data and in-depth molecular mechanism *** editorial critically highlights the study's strengths and weaknesses,compares it against other combination therapy research in T2DM,and underscores the need to explore further the mechanisms underpinning the observed therapeutic effects and investigate the safety profile of this novel approach.

关键词： Diabetes Metformin Cholecalciferol Taurine Hyperglycemia Oxidative stress Triglycerides

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Few-shot learning for screening 2D Ga2CoS4-x supported single-atom catalysts for hydrogen production

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Journal of Energy Chemistry 2025年第01期 665-673页

作者： nabil Khossossi Poulumi Dey Department of Mechanical Engineering (ME) Delft University of Technology

Hydrogen generation and related energy applications heavily rely on the hydrogen evolution reaction（HER）,which faces challenges of slow kinetics and high *** electrocatalysts,particularly single-atom catalysts （SACs） on two-dimensional （2D） materials,are *** study presents a few-shot machine learning （ML） assisted high-throughput screening of 2D septuple-atomic-layer Ga2CoS4-xsupported SACs to predict HER catalytic ***,density functional theory （DFT）calculations showed that 2D Ga2CoS4is inactive for ***,defective Ga2CoS4-x（x=0–0.25）monolayers exhibit excellent HER activity due to surface sulfur vacancies （SVs）,with predicted overpotentials （0–60 mV） comparable to or lower than commercial Pt/C,which typically exhibits an overpotential of around 50 m V in the acidic electrolyte,when the concentration of surface SV is lower than 8.3%.SVs generate spin-polarized states near the Fermi level,making them effective HER *** demonstrate ML-accelerated HER overpotential predictions for all transition metal SACs on 2D *** DFT data from 18 SACs,an ML model with high prediction accuracy and reduced computation time was *** intrinsic descriptor linking SAC atomic properties to HER overpotential was *** study thus provides a framework for screening SACs on 2D materials,enhancing catalyst design.

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Spontaneous and simultaneous complete bilateral rupture of the quadriceps tendon in a patient receiving hemodialysis: A case report and literature review

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World Journal of Orthopedics 2018年第9期9卷 180-184页

作者： Wassim Zribi Mohamed Zribi Ahmed Racem Guidara Mohamed Ben Jemaa Ameur Abid nabil Krid Abdessalem Naceur Hassib keskes Department of Orthopaedic Surgery and Traumatology Habib Bourguiba University Hospital Department of Orthopaedic Surgery and Traumatology Marechal Leclerc Argentan Hospital

The spontaneous and simultaneous rupture of both quadriceps tendons is uncommon and has rarely been reported in the literature. The current case involves a 43-year-old man with end-stage renal disease requiring hemodialysis for the past 20 years. The patient experienced bilateral knee pain and swelling and was unable to bear weight. Physical examination revealed bilateral quadriceps tendon defect above the patella and loss of active extension. Although plain radiographs of both knees showed no fracture or widening of the joint space, an inferiorly positioned patella was observed. Ultrasonography of the knees revealed a quadriceps tendon defect at the upper edge of each patella, while MR imaging revealed a tear in each quadriceps tendon from the superior poles of the patella. The patient then underwent surgical correction wherein the tendons were repaired using sutures passed through drill holes in the patella. The knees were immobilized with splints for 4 wk before starting physiotherapy. The patient subsequently regained full functional activity within 1 year.

关键词： Quadriceps tendon Tear Krackow sutures Renal failure Hyperparathyroidism

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TORQUE CAPACITY AND CONTACT EFFICIENCY OF A HALF TOROIDAL CONTINUOUSLY VARIABLE TRANSMISSIONS

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Chinese Journal of Mechanical Engineering 2004年第3期17卷 457-462页

作者： nabil Abdulla Attia Stats Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing 400044China

The automotive industry is seeking new concepts for a continuously variabletransmission (CVT) in the driveline. One possible solution for a CVT design is half toroidaltraction drive, providing a high torque capacity with quick ratio change. An analytical study on thecontact points of the half toroidal CVT has been detailed. The shapes of the contact areas amongthe input disk, power roller and output disk are considered ellipses. Mathematical equations forestimating the torque capacity, power loss due to spin action, and contact efficiency of theelliptical contacts of the half toroidal CVT are formulated and expressed in the form of integralswhich can be readily evaluated by numerical scheme. The contact efficiency calculations of the halftoroidal CVT have been developed for the proper spin point locations under the effect of systemparameters. Numerical results are presented hi graphical forms for considered parameters, which canhelp the designer to select the proper system parameters to minimize the undesirable spin effects.

关键词： Continuously variable transmission Half toroidal Elliptical contact Torquecapacity Contact efficiency System parameters Spin

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Switch mode capacitive pressure sensors

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Microsystems & Nanoengineering 2022年第6期8卷 47-60页

作者： nabil Shalabi Kyle Searles Kenichi Takahata Department of Electrical and Computer Engineering University of British ColumbiaVancouverBC V6T 1Z4Canada School of Biomedical Engineering University of British ColumbiaVancouverBC V6T 1Z3Canada

Switch mode capacitive pressure sensors are proposed as a new class of microfabricated devices that transform pressure into a mechanically switching capacitance to form an analog-to-digital signal with zero power,high sensitivity,and a high signal-to-noise ratio.A pressure-sensitive gold membrane suspended over a capacitive cavity makes ohmic contact with patterned gold leads on the substrate,closing circuits to fixed on-chip capacitors outside the cavity and leading to significant step *** function is achieved by allocating the switch leads on the part of the counter electrode area,while the remaining area is used for touch mode analog capacitive *** sensor microchip is prototyped through a novel design approach to surface micromachining that integrates micro-Tesla valves for vacuum sealing the sensor cavity,showing an unprecedented response to applied *** a gauge pressure range of 0–120 mmHg,the sensor exhibits an increase of 13.21 pF with resultant switch events,each of which ranges from 2.53–3.96 pF every 12–38 mmHg,in addition to the touch mode linear capacitive increase between *** equivalent sensitivity is 80–240 fF/mmHg,which is 11–600×more than commercial and reported touch mode sensors operating in similar pressure *** sensor is further demonstrated for wireless pressure tracking by creating a resonant tank with the sensor,showing a 32.5–101.6 kHz/mmHg sensitivity with frequency jumps led by the switch *** developed sensor,with its promising performance,offers new application opportunities in a variety of device areas,including health care,robotics,industrial control,and environmental monitoring.

关键词： mode cavity sealing

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Stability of Three-Dimensional Interfacial Waves Under Subharmonic Disturbances

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China Ocean Engineering 2023年第4期37卷 558-567页

作者： nabil ALLALOU Mohammed DEBIANE Christian KHARIF Facultéde Physique Universitédes Sciences et de la Technologie Houari Boumediene(USTHB)Algiers 16123Algeria Technopole de Chateau-Gombert Institut de Recherche sur les Phénomènes Hors Equilibre(IRPHE)Marseille 13384France

This study examines the stability regimes of three-dimensional interfacial gravity *** numerical results of the linear stability analysis extend the three-dimensional surface waves results of Ioualalen and Kharif(1994)to three-dimensional interfacial *** approach of the collocation type has been developed for this *** equations of motion are reduced to an eigenvalue problem where the perturbations are spectrally decomposed into normal *** results obtained showed that the density ratio plays a stabilizing *** addition,the dominant instability is of three-dimensional structure,and it belongs to class I for all values of density ratio.

关键词： short-crested interfacial waves linear stability collocation method Padéapproximant

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An incommensurate fractional discrete macroeconomic system:Bifurcation,chaos,and complexity

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Chinese Physics B 2023年第3期32卷 58-67页

作者： Abderrahmane Abbes Adel Ouannas nabil Shawagfeh Department of Mathematics University of JordanAmman 11942Jordan Department of Mathematics and Computer Science University of Larbi Ben M'hidiOum El Bouaghi 04000Algeria

This study proposes a novel fractional discrete-time macroeconomic system with incommensurate *** dynamical behavior of the proposed macroeconomic model is investigated analytically and *** particular,the zero equilibrium point stability is investigated to demonstrate that the discrete macroeconomic system exhibits chaotic *** using bifurcation diagrams,phase attractors,the maximum Lyapunov exponent and the 0–1 test,we verified that chaos exists in the new model with incommensurate fractional ***,a complexity analysis is carried out utilizing the approximation entropy(ApEn)and C_(0)complexity to prove that chaos ***,the main findings of this study are presented using numerical simulations.

关键词： chaos macroeconomic system discrete fractional calculus complexity

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A comprehensive simulator for assessing the reliability of a photovoltaic panel peak power tracking system

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Frontiers in Energy 2015年第2期9卷 170-179页

作者： nabil KAHOUL Mourad HOUABES Ammar NECAIBIA Laboratoire d' Electrotechnique d' Annaba Badji Mokhtar-AnnabaUniversity Annaba 23000 Algeria Research Unit of Renewable Energy in Saharan Middle (URER/MS) Adrar 01000 Algeria

When designing a maximum power point tracking （MPPT） algorithm, it is often difficult to correctly predict, before field testing, the behavior of this MPPT under varying solar irradiation on photovoltaic （PV） panels. A solution to this problem is to design a maximum power point trackers simulator of a PV system used to test MPPT algorithms. This simulator must have the same role as the MPPT card of the PV panel and thus will fully emulate the response of a real MPPT card of the PV panel. Therefore, it is a good substitute to help to test the peak power trackers of the PV system in the laboratory. This paper describes a simple peak power trackers simulator of the PV system which has a short response time thus, can be used to test MPPT algorithms under very rapid variation condition. The obtained results and the theoretical operation confirm the reliability and the superior perfor- mance of the proposed model.

关键词： photovoltaicdesign maximum powermicroprocessormodule DC-DC converter,point tracking (MPPT) card,

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