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Design of Photonic Crystal Triplexer with Core-Shell Rod Defects

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Chinese Physics Letters 2015年第5期32卷 63-65页

作者： Labbani amel Benghalia Abdelmadjid Laboratory of Hyperfrequency and Semiconductors(L.H.S.) Department of ElectronicsFaculty of Technology and SciencesUniversity Mentouri Constantine 1

We investigate an optical compact triplexer based on two photonic crystal waveguides and resonant cavities. For performing wavelength selection, we use three core-shell rods as the resonant cavities. The core rods are created by introducing air holes in the center of the silicon rods. By varying the radii of the air holes, three specific wavelengths 1.31, 1.49 and 1.55μm can be obtained. This structure is designed and its performance is verified by the finite-difference time-domain method, which is highly suitable for photonic integrated circuits （PICs）. The average output transmission efficiency and quality factor are more than 98.85% and 560, respectively. The mean value of the crosstalk between output channels is about -36.49 dB. The present device is extremely compact with total size 96.24μm2, which is suitable for PICs and can be utilized in the fiber-to-the-home system.

关键词： length Design of Photonic Crystal Triplexer with Core-Shell Rod Defects

Variations in radioactivity of phosphate rocks from different sites in Central Eastern Desert of Upper Egypt

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Nuclear Science and Techniques 2002年第4期13卷 193-201页

作者： amel-Arabi AMMYousef Physics Department Faculty of Science South Valley University 埃及 Qena

Natural radionuclides in the phosphate rock samples collected from Wadi Batur,Wadi Hegaza and Gabal Abu Had at Eastern Desert were determined using a high resolution γ-ray *** experimental results concerning ^226Ra,232Th and their daughters are *** of the measured spectra show that ^226Ra is distinguished with remarkable activities with average values ranging from 22.4 to 558Bq/kg,while ^232Th activity concentration is in the range of 9.7 to 92.8Bq/*** results of the analyses were found to be in a good agreement with the data obtained by others.

关键词：磷酸岩天然放射性核素 226Ra ^232Th

Online conflict resolution strategies for human activity recognition in smart homes

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Journal of Control and Decision 2023年第3期10卷 402-416页

作者： Amina Jarraya amel Bouzeghoub amel Borgi Facultédes Sciences de Tunis Universitéde Tunis El ManarTunisTunisia Samovar Télécom SudParisInstitut Polytechnique de ParisPalaiseauFrance Facultédes Sciences de Tunis Institut Supérieur d’InformatiqueUniversitéde Tunis El ManarTunisTunisia

DCR-OL is a Distributed Collaborative Reasoning multi-agent model with an Online Learning thataims to identify human activities in smart homes from distributed, heterogeneous and dynamicsensor data. In this model, distributed learning agents with diverse classifiers, detect sensorstream data, make local predictions, communicate and collaborate to identify current ***, they learn from their collaborations to improve their own performance in activity *** resolution strategies are applied to generate one final predicted activity when thelocal predicted activity of an agent is different from received predicted activities of other *** this paper, two conflict resolution strategies using online learning, w-max-trust and w-maxfreq,are proposed. We experimentally test these strategies by performing an evaluation studyon the Aruba dataset. The obtained results indicate an enhancement in terms of accuracy and Fmeasuremetrics compared to the offline strategies max-trust and max-freq and also to the onlineexisting one max-wPerf .

关键词： Human activity recognition distributed reasoning learning agents smart homes online learning conflict resolution strategies sensor data stream

Transmission and Reflection of Water-Wave on a Floating Ship in Vast Oceans

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Computers, Materials & Continua 2021年第6期67卷 2971-2988页

作者： amel A.Alaidrous Department of Mathematics Faculty of Applied ScienceUmm Al-Qura UniversityMakkahSaudi Arabia

In this paper,we study the water-wave flow under a floating body of an incident wave in a *** model simulates the phenomenon of waves abording a floating ship in a vast *** same model,also simulates the phenomenon of fluid-structure interaction of a large ice sheet in *** to this *** divide the region of the problem into three ***,satisfying the equation in the fluid mass and a part of the boundary conditions in each subregion,are *** obtain such solutions as infinite series including unknown *** consider a limited number only of the coefficients by truncating the infinite series and satisfy the remaining boundary conditions *** experiments show that the results are *** are given along with the graph of the system of the resulting streamlines and the dynamical pressure acting on the *** drawn system of streamlines shows the correctness of the solution and the pressure is maximum on the side facing the upstream extremity of the *** same procedure can be adequately applied for problems with more complicated geometry and other phenomenon can thus be simulated.

关键词： Potential flow linear theory fixed floating obstacle fourier transformation boundary collocation technique spectral method

Potential antioxidant properties and hepatoprotective effects of Juniperus phoenicea berries against CCl4 induced hepatic damage in rats

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Asian Pacific Journal of Tropical Medicine 2017年第3期10卷 249-255页

作者： amel Laouar Fahima Klibet Ezzeddine Bourogaa amel Benamara amel Boumendjel Azzedine Chefrour Messarah Mahfoud Laboratory of Biochemistry and Environmental Toxicology Faculty of SciencesUniversity of Badji MokhtarAnnaba 23000Algeria Department of Biochemistry and Biological Cellular and Molecular Faculty of SciencesUniversity of MentouriBP 25000 ConstantineAlgeria Laboratoryof Animal Ecophysiology Faculty of SciencesSfaxSoukra road-Km 3.5BP 8023018 SfaxTunisia Department of Applied Biology Faculty of Natural Sciences and LifeUniversity of Larbi TebessiTebessa 12000Algeria Laboratory of pharmaceutical preparations for hospital use Department of PharmacyFaculty of MedicineUniversity of Badji Mokhtar-Annaba 23000Algeria Department of Biology Faculty of Natural Sciences and LifeUiversity of Mohamed Cherif MesaadiaSouk Ahras 41000Algeria

Objective:To investigate the antioxidant and hepatoprotective properties of Juniperus phoenicea(***)berries against CCl_4-induced oxidative damage in ***:Hepatotoxicity was induced in albino Wistar rats by single dose of CCl_4 dissolved in olive oil(1 mL/kg BW,1/1 in olive oil,ip).Aqueous extract of *** berries(AEJP)was administered at the dose of 250 mg/kg/day by gavage for 12 ***:Obtained results revealed that administration of CCl_4 caused a significant increase in plasma ASAT,ALAT,ALP and LDH activities and total bilirubin concentration,compared to the control ***,albumin and total protein concentration were significantly ***,a significant decrease in the level of hepatic GSH,GPx and GST activities associated with a significant increase of MDA content in CCl_4 group than those of the ***,the treatment of experimental rats with AEJP prevented these alterations and maintained the antioxidant *** histopathological observations supported the biochemical evidences of ***:The results of the present investigation indicate that *** possesses hepatoprotective activity and this effect was may be due to its antioxidant proprerties.

关键词： Juniperus phoenicea Oxydative stress Antioxydant Lipid peroxidation Hepatoprotective Biochemical parameters

An Improved Deep Learning Framework for Automated Optic Disc Localization and Glaucoma Detection

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1429-1457页

作者： Hela Elmannai Monia Hamdi Souham Meshoul amel Ali Alhussan Manel Ayadi amel Ksibi Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Information System College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia

Glaucoma disease causes irreversible damage to the optical nerve and it has the potential to cause permanent loss of *** ranks as the second most prevalent cause of permanent *** glaucoma diagnosis requires a highly experienced specialist,costly equipment,and a lengthy wait *** automatic glaucoma detection,state-of-the-art glaucoma detection methods include a segmentation-based method to calculate the cup-to-disc *** methods include multi-label segmentation networks and learning-based methods and rely on hand-crafted *** the optic disc(OD)is one of the key features in retinal images for detecting retinal diseases,especially for glaucoma disease *** approach presented in this study is based on deep classifiers for OD segmentation and glaucoma ***,the optic disc detection process is based on object detection using a Mask Region-Based Convolutional Neural Network(Mask-RCNN).The OD detection task was validated using the Dice score,intersection over union,and accuracy *** OD region is then fed into the second stage for glaucoma ***,considering only the OD area for glaucoma detection will reduce the number of classification artifacts by limiting the assessment to the optic disc *** this task,VGG-16(Visual Geometry Group),Resnet-18(Residual Network),and Inception-v3 were pre-trained and *** also used the Support Vector Machine *** feature-based method uses region content features obtained by Histogram of Oriented Gradients(HOG)and Gabor *** final decision is based on weighted fusion.A comparison of the obtained results from all classification approaches is *** metrics including accuracy and ROC curve are compared for each classification *** novelty of this research project is the integration of automatic OD detection and glaucoma diagnosis in a global ***,the fusion-based decision system uses the g

关键词： Optic disc glaucoma fundus image deep learning

Lignin-Phenylhydrazone as a Corrosion Inhibitor of API X52 Carbon Steel in 3.5%NaCl and 0.1 mol/L HCl Medium

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Chemical Research in Chinese Universities 2021年第3期37卷 718-728页

作者： Nabila AISSIOU Moussa BOUNOUGHAZ amel DJEDDI Bougara Boumerdes35000Algeria UniversitéM’hamed Bougara Facultédes SciencesBoumerdes35000Algeria

The best alternative to fight against corrosion is the use of an inhibitor,the purpose of this work is the formulation of a new biomass-based molecule against corrosion of carbon *** was extracted using the Kraft process and phenylhydrazine molecules have been *** influence of the lignin-phenyl-hydrazone(LP)on the corrosion of carbon steel in salt and the acidic medium was studied by the polarization resistance,the potentiodynamic polarization,and the electrochemical impedance *** results of these tests reveal that the behavior of the inhibitor is a mixed *** adsorption mechanism of the inhibitor follows the Langmuir isothermal *** energy shows that the process of inhibition of carbon steel is *** SEM confirms that the inhibitor reduces the corrosion of the steel and stops the corrosion pitting *** modified lignin shown as a good corrosion inhibitor in acid medium is highly saline with an efficiency>96%.

关键词： Kraft Lignin Phenylhydrazone Corrosion inhibitor Corrosion pitting Electrochemical Impedance

Voltage-controlled Kosterlitz–Thouless transitions and various kinds of Kondo behaviors in a triple dot device

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Chinese Physics B 2017年第9期26卷 376-380页

作者：熊永臣张俊周望怀 amel Laref School of Science and Advanced Functional Material and Photoelectric Technology Research InstitutionHubei University of Automotive Technology Department of Physics Faculty of Science National University of Singapore Department of Physics and Astronomy Science Faculty King Saud University

The transport property and phase transition for a parallel triple dot device are studied by adopting Wilson＇s numerical renormalization group technique, focusing on the effects of level spacings between neighboring dot sites. By keeping dot 2at the half-filled level and tuning the level differences, it is demonstrated that the system transits from local spin quadruplet to triplet and doublet sequently, and three kinds of Kondo peaks at the Fermi surface could be found, which are separated by two Kosterlitz–Thouless type quantum phase transitions and correspond to spin-3/2, spin-1, and spin-1/2 Kondo effect,respectively. To obtain a detailed understanding of these problems, the charge occupation, the spin–spin correlation, the transmission coefficient, and the temperature-dependent magnetic moment are shown, and necessary physical arguments are given.

关键词： triple quantum dot Kosterlitz–Thouless transition Kondo effect critical phenomena

Hybrid Optimization Algorithm for Resource Allocation in LTE-Based D2D Communication

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Computer Systems Science & Engineering 2023年第8期46卷 2263-2276页

作者： amel Austine RSuji Pramila Department of Computer Science and Engineering Noorul Islam Centre for Higher EducationKumaracoilTamilnaduIndia

In a cellular network,direct Device-to-Device(D2D)communication enhances Quality of Service(QoS)in terms of coverage,throughput and amount of power *** theD2D pairs involve cellular resources for communication,the chances of interference are high.D2D communications demand minimum interference along with maximum throughput and sum rate which can be achieved by employing optimal resources and efficient power allocation *** this research,a hybrid optimization model called Genetic Algorithm-Adaptive Bat Optimization(GA-ABO)algorithm is proposed for efficient resource allocation in a cellular network with D2D *** analysis demonstrates that the proposed model involves reduced interference with maximum sum rate and *** performance of the proposed model is compared with the existing Ant Colony Optimization-based resource exchange and GAME(ACO-GAME)theory models,Trader-assistedResource EXchange mechanism-RadioAccess Network(TREX-RAN)and De-centralized Radio Access Network(TREXDRAN),and greedy CYcle-Complete preferences(CYC)*** proposed model offers a maximum sum rate of 83 kB/s,which is much better than the existing techniques.

关键词： Device-to-Device communication Genetic Algorithm(GA) Adaptive Bat Optimization(ABO)algorithm resource exchange