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Journal of Electromagnetic Analysis and Applications 2011年第9期3卷 343-350页

作者： Samia bouali Taoufik Aguili 不详

This paper presents a modeling and an analysis of one-dimensional periodic structure composed of a cascade connection of N cells considered as infinite. The ABCD matrix representations with the Floquet analysis have been used to derive the dispersion relation and input impedance of infinite periodic structure. The transmission matrix for the N identical cascaded cells has been successfully used to obtain an efficient and easy-to-use formula giving the necessary number of cells such that they can be considered infinite. As an illustrative example, the formula is applied and verified to finite size TL periodically loaded with obstacles. Scattering parameters and the input impedance of the structure are expressed and plotted.

关键词： Periodic Structure Floquet Theorem Dispersion Relation Scattering Parameters Input Impedance

Experimental and quantum chemical studies of carboxylates as corrosion inhibitors for AM50 alloy in pH neutral NaCl solution

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Journal of Magnesium and Alloys 2022年第2期10卷 596-611页

作者： Junjie Yang Pingli Jiang Youmin Qiu Chih-Yu Jao Carsten Blawert Sviatlana Lamaka Anissa bouali Xiaopeng Lu Mikhail L.Zheludkevich Wei Li Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632PR China Helmholtz-Zentrum Hereon Institute of Surface ScienceGeesthacht 21502Germany School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001PR China Shenyang National Laboratory for Materials Science Northeastern University3-11 Wenhua RoadShenyang 110819PR China Faculty of Engineering University of KielKaiserstraße 2Kiel 24143Germany

Sodium salts of mono-and di-carboxylic acids(glycolic,fumaric and benzoic acid)were studied as corrosion inhibitors for AM50 alloy in pH neutral aqueous NaCl *** evolution,electrochemical and surface characterization techniques were employed to reveal their corrosion inhibition mechanism,whilst the molecular features of inhibitors were investigated by quantum chemical *** inhibitors reduced anodic dissolution of AM50 and their efficiency generally increased with time and concentration from 5 mM to 100 *** inhibition mechanism can be described as physisorption of inhibitive molecules on the surface of the intrinsic oxide layer followed by chemisorption with Mg^(2+)and Al^(3+),and the difference in inhibition action among these inhibitors was explained on the molecular scale.

关键词： Mg-Al magnesium alloy Neutral NaCl solution Corrosion inhibitors Electrochemistry Density functional theory

InSAR as a tool for monitoring hydropower projects:A review

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Energy Geoscience 2022年第2期3卷 160-171页

作者： J.Aswathi R.B.Binoj Kumar T.Oommen E.H.bouali K.S.Sajinkumar Department of Geology University of KeralaThiruvananthapuram695581KeralaIndia Department of Geological and Mining Engineering and Sciences Michigan Technological UniversityHoughtonMIUSA Department of Physical and Life Sciences Nevada State CollegeHendersonNV89002USA

This paper provides a review of using Interferometric Synthetic Aperture Radar(InSAR),a microwave remote sensing technique,for deformation monitoring of hydroelectric power projects,a critical infrastructure that requires consistent and reliable *** all major dams around the world were built for the generation of *** can enhance dam safety by providing timely settlement measurements at high *** paper provides a holistic view of different InSAR deformation monitoring techniques such as Differential Synthetic Aperture Radar Interferometry(DInSAR),Ground-Based Synthetic Aperture Radar(GBInSAR),Persistent Scatterer Interferometric Synthetic Aperture Radar(PSInSAR),Multi-Temporal Interferometric Synthetic Aperture Radar(MTInSAR),QuasiPersistent Scatterer Interferometric Synthetic Aperture Radar(QPSInSAR)and Small BAseline Subset(SBAS).PSInSAR,GBInSAR,MTInSAR,and DInSAR techniques were quite commonly used for deformation *** studies demonstrate the advantage of InSAR-based techniques over other conventional methods,which are laborious,costly,and sometimes *** technology is also favoured for its capability to provide monitoring data at all times of day or night,in all-weather conditions,and particularly for wide areas with mm-scale ***,the method also has some disadvantages,such as the maximum deformation rate that can be monitored,and the location for monitoring cannot be *** this review,we aim to popularize InSAR technology to monitor the deformation of dams,which can also be used as an early warning method to prevent any unprecedented *** study also discusses some case studies from southern India to demonstrate the capabilities of InSAR to indirectly monitor dam health.

关键词： InSAR RADAR Microwave Deformation Dam

A New Full-NT-Step Infeasible Interior-Point Algorithm for SDP Based on a Specific Kernel Function

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Applied Mathematics 2012年第9期3卷 1014-1022页

作者： Samir bouali Samir Kabbaj Department of Mathematics and Informatics Faculty of Sciences University Ibn Tofail Kenitra Morocco

In this paper, we propose a new infeasible interior-point algorithm with full NesterovTodd (NT) steps for semidefinite programming (SDP). The main iteration consists of a feasibility step and several centrality steps. We used a specific kernel function to induce the feasibility step. The analysis is more simplified. The iteration bound coincides with the currently best known bound for infeasible interior-point methods.

关键词： Semidefinite Programming Full Nesterov-Todd Steps Infeasible Interior-Point Methods Polynomial Complexity Kernel Functions

f(T,B)gravity with statistically fitting of H(z)

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Communications in Theoretical Physics 2023年第9期75卷 79-90页

作者： S H Shekh N Myrzakulov a bouali A Pradhan Department of Mathematics S.P.M.Science and Gilani ArtsCommerce CollegeGhatanjiYavatmalMaharashtra 445301India L.N.Gumilyov Eurasian National University Astana 010008Kazakhstan Ratbay Myrzakulov Eurasian International Center for Theoretical Physics Astana010009Kazakhstan Laboratory of Physics of Matter and Radiation Mohammed I UniversityBP 717OujdaMorocco Centre for Cosmology Astrophysics and Space Science(CCASS)GLA UniversityMathura-281406Uttar PradeshIndia

Some recent developments(accelerated expansion)in the Universe cannot be explained by the conventional formulation of general *** apply the recently proposed f(T,B)gravity to investigate the accelerated expansion of the *** parametrizing the Hubble parameter and estimating the best fit values of the model parameters b_(0),b_(1),and b_(2)imposed from Supernovae type la,Cosmic Microwave Background,B aryon Acoustic Oscillation,and Hubble data using the Markov Chain Monte Carlo method,we propose a method to determine the precise solutions to the field *** then observe that the model appears to be in good agreement with the observations.A change from the deceleration to the acceleration phase of the Universe is shown by the evolution of the deceleration *** addition,we investigate the behavior of the statefinder analysis,equation of state(EoS)parameters,along with the energy ***,to discuss other cosmological parameters,we consider some wellknown f(T,B)gravity models,specifically,f(T,B)=aT^(b)+cB^(d).Lastly,we find that the considered f(T,B)gravity models predict that the present Universe is accelerating and the EoS parameter behaves like the ACDM model.

关键词： isotropic homogeneous space-time f(T,B)gravity statistical fitting of H(z)data cosmology

Influence of LDH conversion coatings on the adhesion and corrosion protection of friction spot-joined AA2024-T3/CF-PPS

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Journal of Materials Science & Technology 2021年第8期67卷 197-210页

作者： A.C.bouali N.M.Andre M.R.Silva Campos M.Serdechnova J.F.dos Santos S.T.Amancio-Filho M.L.Zheludkevich Institute of Materials Research Helmholtz-Zentrum G eesthacht.Magnesium Innovation CentreCorrosion and Surface TechnologyMax-Planck-Straβe 121502 CeesthachtGermany Institute of Materials Research Helmholtz-Zentrum GeesthachtMaterials MechanicsSolid State Joining ProcessesMax-Planck-Straβe 121502 CeesthachtGermany Graz University of Technology-TU Graz Institute of Materials Sciencejoining and FormingBMK Endowed Professorship for AviationKopemikusgasse 24/18010 GrazAustria Faculty of Engineering University of KielKaiserstrasse 224143 KielGermany

Layered double hydroxide(LDH)conversion coatings loaded with corrosion inhibitors were suggested for the surface treatment of the aluminum alloy 2024-T3,prior to friction spot joining with carbon-fiber reinforced polyphenylene sulfide(AA2024-T3/CF-PPS).Vanadate was used as a model corrosion *** shear testing method revealed an increase of approx.20%of the joint’s adhesion performance when treated with LDH and before exposure to salt *** evaluation of the joints after exposure to salt spray demonstrated a significant difference in the corrosion behavior of the joints when the AA2024-T3 is treated with LDH loaded with nitrate and vanadate *** LDH intercalated with nitrate revealed a clear improvement in the mechanical and corrosion resistance performance of the joints,even after 6 weeks of salt ***,the LDH intercalated with vanadate failed in providing protection against corrosion as well as preserving the mechanical properties of the *** effect of the galvanic corrosion was further investigated by zero resistance ammeter(ZRA)measurements as well as localized scanning vibrating electrode technique(SVET).

关键词： Friction spot joining Layered double hydroxide Galvanic couple Corrosion protection Adhesion

The Wheat Pathogenesis Related Protein (TdPR1.2) Ensures Contrasting Behaviors to <i>E. coli</i>Transformant Cells under Stress Conditions

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Advances in Microbiology 2021年第9期11卷 453-468页

作者： Mouna Ghorbel Ikram Zribi Najla Haddaji Malek Besbes Nouha bouali Faiçal Brini Biology Department Faculty of Science University of Ha’il Ha’il Saudi Arabia Biotechnology and Plant Improvement Laboratory Centre of Biotechnology of Sfax (CBS) University of Sfax Sfax Tunisia

The pathogenesis-related proteins 1 (PR-1) gene family play important roles in the plant metabolism in response to biotic and abiotic stresses. The wheat TdPR1.2 has been previously isolated and characterized. Here we showed by bio-informatic analysis that TdPR1.2 contains six cysteine residues that are conserved between all PR-1 proteins tested. Using ScanProsite tool, we found that TdPR1.2 structure has a CRISP family signature 1 and 2 located at the C-terminal part of the protein. Those two domains are conserved in many identified PR1.2 proteins in plants. Moreover, SignalIP-5.0 analysis revealed that TdPR1.2 contains a putative signal peptide formed by 25 amino acids at the N-terminal extremity. The presence of this signal peptide suggested that the mature proteins will be secreted after the cleavage of the signal sequence. Further, we investigate the role of the TdPR1.2 proteins in the growth of Escherichia coli transformants cells under different abiotic stresses. Our results showed that the full-length form of TdPR1.2 enhanced tolerance of E. coli against salt and osmotic stress but not to KCl. Moreover, TdPR1.2 protein confers bacterial tolerance to heavy metals in solid and liquid mediums. Based on these results, we suggest that the TdPR1.2 protein could play an important role in response to abiotic stress conditions.

关键词： Abiotic Stress Bioinformatic Analysis Durum Wheat E. coli Growth Inhibition Pathogen Related Proteins Protein Expression

An Alternative Model to Radon Transform for Gamma Ray Emission Tomography

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Advances in Molecular Imaging 2017年第2期7卷 13-47页

作者： Christian Jeanguillaume Richard Simonnet Christine Cavaro-Menard Abdelha Douiri Ines bouali Jean Jacques Loeb LARIS Laboratoire Angevin de Recherche en Ingenierie des Systemes Universite d’Angers Angers France Direction Generale de l’Armement Techniques Terrestres Bourges France King College London London United Kingdom LAREMA Laboratoire Angevin de Recherche en Mathematiques Universite d’Angers Angers France

The Radon transform fits badly Single Photon Emission Tomography (SPECT). However, Thin Holes Collimator (THC) and Radon model are widely used. The CACAO project has been proposed to enhance the quality of SPECT images. CACAO is a short hand notation for computer aided collimation tomography. The main idea of this project is to use collimators with much larger holes to increase the sensitivity, and slightly longer holes to increase the spatial resolution. The acquisition sequence includes a translation. The Radon projection is replaced by a 2D sum. A dedicated reconstruction algorithm has been developed. If the physical advantage of the project in terms of sensitivity and spatial resolution is generally admitted, a question remains unanswered: Would the ill-posedness of the inverse problem ruin the quality of the reconstructed images? In this article, a representation of the 2D direct problem matrix is derived. This allows us to compare the two inverse problems (CACAO versus THC). The condition number was used for this comparison. We studied the variation of these condition numbers with several parameters. For a proper set of parameters, the CACAO inverse problem may appear easier to solve and more accurately than the THC one.

关键词： Radon Transform Tomography SPECT Large and Long Hole Collimators Inverse Problems

Management of Rathke’s Cleft Cysts: About Three Observations

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Open Journal of Modern Neurosurgery 2014年第4期4卷 169-172页

作者： bouali Sofiene Badri Mohamed Boubaker Adnene Ben Said Imed Bouhoula Asma Zemmel Ihsen Jemel Hafedh Department of Neurosurgery National Institute of Neurology Mongi Ben Hmida Tunis Tunisia Department of Neurosurgery CTGB Ben Arous Faculty of Medicine University OF Tunis El Manar Tunis Tunisia

Rathke cleft cysts are benign sellar lesions that are generally asymptomatic. Rathke cleft cyst can enlarge and become symptomatic. Surgical therapy is the mainstay of treatment for symptomatic RCC. The optimal surgical strategy remains debatable. We report our experience with this lesion and we discuss the advantages and disadvantages of each technique through a literature review.

关键词： Rathke Cleft Cyst Transsphenoidal Surgery Magnetic Resonance Imaging

A Case Report of Osteosarcoma of the Skull

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Open Journal of Modern Neurosurgery 2014年第3期4卷 105-109页

作者： bouali Sofiene Bouhoula Asma Boubaker Adnene Ben Said Imed Kallel Jalel Aouij Lassaad Jemel Hafedh Department of Neurosurgery Faculty of Medicine University of Tunis El Manar National Institute of Neurology Mongi Ben Hmida Tunis Tunisia

Background: Osteosarcoma is the most common primary malignancy and aggressive neoplasm of bone composed of spindle cells producing osteoid. The incidence of primary osteogenic sarcomas of the skull is about 1% to 2% of all skull tumors. Methods: We present an extraordinary case of osteosarcoma arising in the postero-temporal region of the skull. The clinical features, diagnosis and management are discussed. Results: A 34-year-old woman was operated in our department for mass, fixed to bone in the left postero-temporal area. Histopathology confirmed the diagnosis of osteogenic sarcoma. Conclusion: We review the literature of reported cases of primary osteogenic sarcomas of the skull to discuss the common clinical presentation, evaluation methods, and recommended treatment plans.

关键词： Osteosarcoma Primary Tumor Skull