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Oral Hygiene in the Presence of Orthodontic Therapy

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Journal of Biosciences and Medicines 2024年第2期12卷 98-110页

作者： Emmanuel John Aryeetey hicham Benyahia Fatima Zaoui Faculty of Dental Medicine Mohammed University in Rabat Rabat Morocco

Orthodontic treatment offers great advantages in improving facial and smile aesthetics, self-confidence and the function of the stomatognathic apparatus. The pursuit of these advantages makes use of orthodontic appliances that could be fixed or removable. However, it’s worth stating that these appliances interfere with tooth brushing, making it more difficult to brush teeth effectively. Orthodontics appliances therefore promote the accumulation of dental plaque, which results in both quantitative and qualitative changes in the oral microbiota, hence, exposing patients to several adverse effects such as White spot lesions, dental caries, periodontal pathologies and halitosis. For this reason, oral assessment of patients before, during and after treatment is necessary as well as oral hygiene instructions and motivation. Orthodontists therefore, should educate patients on oral and periodontal hygiene in order to control dental and periodontal complications. Prescriptions of plaque control materials adapted to each patient are done in order to optimize the final result and minimize unwanted complications.

关键词： Orthodontic Treatment Oral Microbiome Oral Hygiene Periodontitis Gingivitis Orthodontic Fixed Appliances Orthodontic Removable Appliances White Spot Lesions (WSL)

Velamentous Cord Insertion: Interest of Antenatal Diagnosis and Review of the Literature

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Open Journal of Obstetrics and Gynecology 2024年第2期14卷 234-239页

作者： Karam Harou Aboubacar Sidiki Sidibe hicham Abdelkhalki Abderaouf Soummani Department of Obstetrics and Gynecology Caddi Ayyad University Medical Hospital Med VI Marrakech Morocco

Velamentous insertion of the umbilical cord corresponds to the insertion of the cord directly on amniotic membranes. It is a rare situation whose frequency varies from 0.5% to 1.69% of single pregnancies. It must be diagnosed during the morphological ultrasound of the 2nd trimester, actively looking for the association with a vasa previa, due to the risk of fetal haemorrhagic threat. We report an antenatal diagnosis of velamentous cord insertion and its management with literature review.

关键词： Velamentous Cord Insertion Vasa Previa Antenatal Diagnosis Ultrasound Doppler Benckiser’s Hemorrhage

Extra Renal Rhabdoid Tumor: A Rare Cause of Congenital Soft Tissue Tumor

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Open Journal of Pediatrics 2024年第3期14卷 579-584页

作者： Tazi Charki Mohammed Akammar Amal Dardar Hajar Abdellaoui hicham Atarraf Karima Boubou Meryem Afifi Moulay Abderrahmane Department of Pediatric Orthopedic and Traumatology University Hospital Hassan II Fez Morocco The Faculty of Medicine and Pharmacy Sidi Mohamed Ben Abdellah University Fez Morocco Department of Radiology University Hospital Hassan II Fez Morocco

Rhabdoid tumors (RTs) are a well-defined entity in the kidney or central nervous system of infants or children. However, soft-tissue involvement is uncommon. It’s an exceptional neonatal tumor of soft tissue. The imaging characteristics of this tumor are not specific. Biopsy allows diagnosis;the histomorphological characteristics of rhabdoid tumors, their immunoreactivity to epithelial markers and vimentin, and the INI-1 loss are important tools for diagnosis. RT tumors are aggressive and have a rapidly fatal clinical course in most cases. Despite multidisciplinary therapy, the survival rate is very low. We report a rare case occurring in a male neonate who presents at birth with a voluminous right axillary mass. A CT scan showed a well-limited tumor mass with lobulated contours. An ultrasound-guided biopsy was performed on day 8, showing the morphology and immunoprofile of RT. The mass showed rapid growth. The child was admitted for respiratory distress at 3 weeks. A thoraco-abdominal CT showed an increase in the size of the mass with the appearance of multiple lymph nodes and pleural, hepatic, and renal metastases. The child died two days later.

关键词： Congenital Rhabdoid Tumor Soft Tissue Diagnosis Immunohistochemistry INI-1

An Efficient Hybrid Model for Arabic Text Recognition

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Computers, Materials & Continua 2023年第2期74卷 2871-2888页

作者： hicham Lamtougui hicham El Moubtahij Hassan Fouadi Khalid Satori LIIAN Laboratory Faculty of Sciences Dhar-MahrazFez30000Morocco Modeling Systems and Technologies of Information TeamUniversity of Ibn ZohrAgadir

In recent years,Deep Learning models have become indispensable in several fields such as computer vision,automatic object recognition,and automatic natural language *** implementation of a robust and efficient handwritten text recognition system remains a challenge for the research community in this field,especially for the Arabic language,which,compared to other languages,has a dearth of published *** this work,we presented an efficient and new system for offline Arabic handwritten text *** new approach is based on the combination of a Convolutional Neural Network(CNN)and a Bidirectional Long-Term Memory(BLSTM)followed by a Connectionist Temporal Classification layer(CTC).Moreover,during the training phase of the model,we introduce an algorithm of data augmentation to increase the quality of *** proposed approach can recognize Arabic handwritten texts without the need to segment the characters,thus overcoming several problems related to this *** train and test(evaluate)our approach,we used two Arabic handwritten text recognition databases,which are IFN/ENIT and *** Experimental results show that our new approach,compared to other methods in the literature,gives better results.

关键词： Deep learning arabic handwritten text recognition convolutional neural network(CNN) bidirectional long-term memory(BLSTM) connectionist temporal classification(CTC)

Fuzzy adaptive sliding mode controller for electrically driven wheeled mobile robot for trajectory tracking task

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Journal of Control and Decision 2022年第1期9卷 71-79页

作者： Brahim Moudoud hicham Aissaoui Mohammed Diany Laboratory of Sustainable Development Faculty of Sciences and TechnologiesSultan Moulay Slimane UniversityBeni MellalMorocco Industrial Engineering Laboratory Faculty of Sciences and TechnologiesSultan Moulay Slimane UniversityBeni MellalMorocco

This paper presents a fuzzy adaptive sliding mode controller(FASMC)for electrically driven wheeled mobile robot for trajectory tracking task in the presence of uncertainties and ***,a finite-time kinematic controller is developed to compute the auxiliary velocity ***,the FASMC,based on the nonlinear dynamic model of the robot and its actuators,is used to guarantee the stability and the convergence of the closed-loop ***,by employing the advantages of the fuzzy logic systems,the developed controller ensures the robustness of the system against dynamic disturbances and uncertainties,the smoothness of the computing voltage against the chattering phenomenon,and the optimal convergence of the velocity and posture *** Lyapunov theory is used to analyse the stability of this *** order to evaluate the effectiveness of the developed method,numerical simulations are done in the Mahlab/Simulink environment.

关键词： Fuzzy adaptive sliding mode controller uncertainties and disturbances computing input voltage electrically driven WMR Lyapunov theory

Extended state observer-based finite-time adaptive sliding mode control for wheeled mobile robot

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Journal of Control and Decision 2022年第4期9卷 465-476页

作者： Brahim Moudoud hicham Aissaoui Mohammed Diany Faculty of Sciences and Technologies Sultan Moulay Slimane UniversityBeni MellalMorocco

In this paper,an Improved Extended State Observer-based Finite-Time adaptive sliding mode control,is investigated for trajectory tracking control of a wheeled mobile ***,a novel finite-time adaptive sliding mode control,based on the fractional power of the sliding surface,is developed to deal with the chattering ***,this strategy improves the conver-gence rate by adjusting online the switching part in sliding mode ***,an improved Non-linear ESO is employed to reconstruct and compensate for the unknown *** complete the trajectory tracking control,the kinematic algorithm is in ***,the proposed control scheme converges within finite-time thanks to the Lyapunov ***,numerical simulations show the efficiency of the designed controller.

关键词： Finite-Time adaptive control non-linear extended state observer adaptive sliding mode control Lyapunov theory

Towards the Development of Mechanical Systems Entirely Based on Natural Materials

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1285-1292页

作者： Fatima Zohra Elhilali hicham Fihri-Fassi Hassan First University of Settat Settat26000Morocco

In order to mitigate the risks stemming from the utilization of mineral and synthetic organic substances,consensus exists in the literature that additional efforts should be devoted to the identification of adequate equivalent natural(ecological)*** work presents the outcomes of a preliminary study where the physical,mechanical,chemical and thermal properties of natural fibers have been ***,areca,and materials such as Moroccan doum and jute are *** a case study,a brake pad based on natural fibers is critically assessed.

关键词： Areca fiber doum fiber(Dwarf palm) jute fiber natural materials natural fibers palm fiber fiber’s properties

Efficient method for wind velocity estimation and power-extraction maximization using a fourth-order Luenberger observer in a wind-energy-conversion system

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Clean Energy 2022年第6期6卷 797-809页

作者： Younes Azelhak Damien Voyer hicham Medromi Laboratory of Research in Engineering(LRI) System Architecture Team(EAS)Hassan II University—ENSEM Casablanca 8118 Morocco EIGSI La Rochelle 17000 France 3Laboratory of Research in Engineering(LRI)System Architecture Team(EAS)Hassan II University—ENSEM Casablanca 8118Morocco

This paper proposes an advanced method for estimating numerous parameters in a wind-energy-conversion system with high precision,especially in a transient state,including the rotation speed and mechanical torque of the turbine as well as wind *** suggested approach is designed into two ***,a fourth-order Luenberger observer is proposed to take into account the significant fluctuations of the mechanical torque that can be caused by wind *** observer provides an accurate estimate of speed and mechanical torque in all weather conditions and especially when the wind is *** the same time,the wind velocity is calculated using the Luenberger observer outputs and a model of the mechanical power generated by the ***,these estimated parameters are exploited as input in a maximum-power-point tracking(MPPT)algorithm using the tip-speed ratio(TSR)to improve the sensorless strategy *** results were performed using MATLAB®/Simulink®for both wind gust and real wind *** have verified that for wind gusts with jumps ranging from 3 to 7 m/s,the new observer manages to better follow the rotation speed and the torque of the turbine compared to a usual *** addition,we demonstrated that by applying the proposed estimator in the improved TSR-MPPT strategy,it is possible to extract 3.3%more energy compared to traditional approaches.

关键词： wind velocity estimation mechanical parameters estimation MPPT algorithm wind-energy-conversion system

Double-skin façade simulation with computational fluid dynamics:A review of simulation trends,validation methods and research gaps

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Building Simulation 2023年第12期16卷 2307-2331页

作者： Simon Pommerencke Melgaard Ivan Titov Nikolaisson Chen Zhang hicham Johra Olena Kalyanova Larsen Department of the Built Environment Aalborg UniversityDenmarkThomas Manns Vej 239220 AalborgDenmark

Dynamic simulation of a double-skin façade(DSF)with computational fluid dynamics(CFD)can be challenging due to the lack of validated models and benchmarking ***,there is a lack of consensus in the scientific community on what constitutes a successfully validated DSF *** present review study identifies simulation trends and research gaps for DSFs simulated with ***,this article presents a series of CFD simulations in which key aspects of the DSF modelling are varied:2D or 3D modelling approaches,turbulence viscosity models(TVMs),radiation models,and wall *** simulation results are compared to the empirical data(both temperature and velocity fields)of a benchmark test with laboratory-controlled boundary *** analysis shows that using the k-εRNG model with enhanced wall treatment and surface-to-surface(S2S)radiation model yields the best results for the 2D case of natural convection ***,it is shown that accounting for the velocity field in the validation process is essential to ensure the suitability of a ***,the authors advocate for the use of selected dimensionless numbers to improve the comparability of the different DSF scientific *** would also help to identify relevant experimental datasets for validation and suitable CFD simulation settings for specific DSF cases.

关键词： double-skin facade ventilated cavity computational fluid dynamics empirical validation modelling parameters dimensionless numbers convection