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Magnetocaloric and magnetic properties of La_2NiMnO_6 double perovskite

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Chinese Physics B 2016年第8期25卷 373-378页

作者： Masrour R jabar A Laboratory of Materials Processes Environment and Quality Cady Ayyed University National School of Applied Sciences

The magnetic effect and the magnetocaloric effect in La_2NiMnO_6（LNMO） double perovskite are studied using the Monte Carlo *** magnetizations,specific heat values,and magnetic entropies are obtained for different exchange interactions and external magnetic *** adiabatic temperature is *** transition temperature is *** relative cooling power is established with a fixed value of exchange *** to the master curve behaviors for the temperature dependence of △S_m^（max） predicted for different maximum fields,in this work it is confirmed that the paramagnetic-ferromagnetic phase transition observed for our sample is of a second *** near room-temperature interaction and the superexchange interaction between Ni and Mn are shown to be due to the ferromagnetism of LNMO.

关键词： oxides magnetocaloric Monte Carlo simulation specific heat magnetic properties

Effects of magnetic field on photon-induced quantum transport in a single dot-cavity system

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Chinese Physics B 2016年第11期25卷 270-274页

作者： Nzar Rauf Abdullah Aziz H Fatah jabar M A Fatah Physics Department College of Science University of Sulaimani Science Institute University of Iceland

In this study,we show how a static magnetic field can control photon-induced electron transport through a quantum dot system coupled to a photon *** quantum dot system is connected to two electron reservoirs and exposed to an external perpendicular static magnetic *** propagation of electrons through the system is thus influenced by the static magnetic and the dynamic photon *** is observed that the photon cavity forms photon replica states controlling electron transport in the *** the photon field has more energy than the cyclotron energy,then the photon field is dominant in the electron ***,the electron transport is enhanced due to activation of photon replica *** contrast,the electron transport is suppressed in the system when the photon energy is smaller than the cyclotron energy.

关键词： photon connected reservoirs zigzag suppressed perpendicular exposed spacing Hamiltonian confinement

Time gap for temporal cloak based on spectral hole burning in atomic medium

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Chinese Physics B 2016年第8期25卷 175-180页

作者： Abdul jabar M S Bakht Amin Bacha Iftikhar Ahmad Department of Physics University of Malakand

We demonstrate the possibility of creating a time gap in the slow light based on spectral hole burning in a fourlevel Doppler broadened sodium atomic system. A time gap is also observed between the slow and the fast light in the hole burning region and near the burnt hole region, respectively. A cloaking time gap is attained in microseconds and no distortion is observed in the transmitted pulse. The width of the time gap is observed to vary with the inverse Doppler effect in this system. Our results may provide a way to create multiple time gaps for a temporal cloak.

关键词： temporal cloak susceptibility slow and fast light spectral holes

Fatty acids of Pleurotus florida mushroom:Potential molecules for blood glucose control

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Food Bioscience 2022年第2期46卷 395-402页

作者： Shefali Madaan Sanaa Ismael Abdul jabar Bibhu Prasad Panda Microbial&Pharmaceutical Biotechnology Laboratory Department of Pharmacognosy and PhytochemistrySchool of Pharmaceutical Education and ResearchJamia HamdardNew DelhiIndia

In Vitro-In Vivo antidiabetic effect of Pleurotus florida mycelia was evaluated using enzymes,yeast cell and in streptozotocin induced type 2 diabetic(T2D)animal *** mycelia was prepared by submerged fermentation *** fungal biomass was organically extracted using mixture of ethanol and *** extractives yield of 14.3%w/w was obtained in hydroalcoholic solvent with dielectric constant-δvalue of 78.2(EX78).*** mycelia extract(EX 78)shows higher antioxidant power with 86.87%free radical scavenging activity and with 75.29 reducing ***-vitroα-amylase inhibition,α-glucosidase inhibition and glucose uptake activity of EX 78 shows higher *** *** mycelia extract(EX 78)is also found to be effective in controlling of blood glucose and insulin level in streptozotocin-nicotinamide induced T2D *** blood glucose was reduced to 216±6.21 mg/dl from 357±0.34 mg/dl and the insulin level was increased to 0.423±0.006 ng per mL from 0.164±0.03 ng/mL in *** treated *** higher fatty acids,C20-eicosane;C24-tetracosane and C30-squalene present in *** mycelium extract was found to be effective in inhibiting human intestinalα-glucosidase and pancreaticα-*** *** mushroom is found to be effective in controlling high blood glucose elevated liver and cardiac *** of this mushroom is suitable for controlling blood glucose level in person with hyperglycaemia.

关键词： Pleurotus florida Oyster mushroom Bioactive molecules Hyperglycaemia Type 2 diabetic

Atom Microscopy via Dual Resonant Superposition

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Communications in Theoretical Physics 2015年第12期64卷 741-746页

作者： M.S.Abdul jabar Bakht Amin Bacha M.Jalaluddin Iftikhar Ahmad Department of Physics University of Malakand

An M-type Rb^(87) atomic system is proposed for one-dimensional atom microscopy under the condition of Electromagnetically Induced ***-localization of the atom in the absorption spectrum while its delocalization in the dispersion spectrum is observed due to the dual superposition effect of the resonant *** observed minimum uncertainty peaks will find important applications in Laser cooling,creating focused atom beams,atom nanolithography,and in measurement of the center-of-mass wave function of moving atoms.

关键词： atom microscopy resonant fields susceptibility

An Optimal Algorithm for Resource Allocation in D2D Communication

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Computers, Materials & Continua 2023年第4期75卷 531-546页

作者： Shahad Alyousif Mohammed Dauwed Rafal Nader Mohammed Hasan Ali Mustafa Musa jabar Ahmed Alkhayyat Research Centre University of MashreqBaghdadIraq College of Engineering Department of Electrical&Electronic EngineeringGulf UniversityAlmasnadKingdom of Bahrain Medical Instrumentation Techniques Engineering Dijlah University CollegeBaghdadIraq Department of Pharmacy Al-Mustaqbal University CollegeHilla51001Iraq Computer Techniques Engineering Department Faculty of Information TechnologyImam Ja’afar Al-Sadiq UniversityNajaf10023Iraq Department of Medical Instruments Engineering Techniques Al-Turath University CollegeBaghdad10021Iraq Department of Medical Instruments Engineering Techniques Al-Farahidi UniversityBaghdad10021Iraq College of Technical Engineering The Islamic UniversityNajafIraq

The number of mobile devices accessing wireless networks isskyrocketing due to the rapid advancement of sensors and wireless communicationtechnology. In the upcoming years, it is anticipated that mobile datatraffic would rise even more. The development of a new cellular networkparadigm is being driven by the Internet of Things, smart homes, and moresophisticated applications with greater data rates and latency *** are being used up quickly due to the steady growth of smartphonedevices andmultimedia apps. Computation offloading to either several distantclouds or close mobile devices has consistently improved the performance ofmobile devices. The computation latency can also be decreased by offloadingcomputing duties to edge servers with a specific level of computing ***-to-device (D2D) collaboration can assist in processing small-scaleactivities that are time-sensitive in order to further reduce task delays. The taskoffloading performance is drastically reduced due to the variation of differentperformance capabilities of edge nodes. Therefore, this paper addressed thisproblem and proposed a new method for D2D communication. In thismethod, the time delay is reduced by enabling the edge nodes to exchangedata samples. Simulation results show that the proposed algorithm has betterperformance than traditional algorithm.

关键词： D2D communication resource allocation latency optimization

Spectral Hole Burning via Kerr Nonlinearity

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Communications in Theoretical Physics 2015年第10期64卷 473-478页

作者： Anwar Ali Khan M.S.Abdul jabar M.Jalaluddin Bakht Amin Bacha Iftikhar Ahmad Department of Physics University of Malakand

Spectral hole burning is investigated in an optical medium in the presence of Doppler broadening and Kerr nonlinearity. The Kerr nonlinearity generates coherent hole burning in the absorption spectrum. The higher order Kerr nonlinearity enhances the typical lamb dip of the hole. Normal dispersion in the hole burning region while Steep anomalous dispersion between the two hole burning regions also enhances with higher order Kerr effect. A large phase shift creates large delay or advancement in the pulse propagation while no distortion is observed in the pulse. These results provide significant steps to improve optical memory, telecom devices, preservation of information and image quality.

关键词： spectral hole burning Kerr nonlinearity Doppler br

Brain Tumor Segmentation in Multimodal MRI Using U-Net Layered Structure

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Computers, Materials & Continua 2023年第3期74卷 5267-5281页

作者： Muhammad Javaid Iqbal Muhammad Waseem Iqbal Muhammad Anwar Muhammad Murad Khan Abd jabar Nazimi Mohammad Nazir Ahmad Department of Information Technology The Superior UniversityLahorePakistan Department of Software Engineering The Superior UniversityLahorePakistan Department of Information Sciences Division of Science and TechnologyUniversity of EducationLahorePakistan Department of Computer Science Government College UniversityFaisalabadPakistan Deptment of Oral and Maxillofacial Surgery Faculty of DentistryUniversiti Kebangsaan MalaysiaKuala LumpurMalaysia Institute of IR4.0 Universiti Kebangsaan MalaysiaBangiSelangorMalaysia

The brain tumour is the mass where some tissues become old or damaged,but they do not die or not leave their *** brain tumour masses occur due to malignant *** tissues must die so that new tissues are allowed to be born and take their *** segmentation is a complex and time-taking problem due to the tumour’s size,shape,and appearance *** finding such masses in the brain by analyzing Magnetic Resonance Images(MRI)is a crucial task for experts and *** could not work for large volume images simultaneously,and many errors occurred due to overwhelming image *** main objective of this research study is the segmentation of tumors in brain MRI images with the help of digital image processing and deep learning *** research study proposed an automatic model for tumor segmentation in MRI *** proposed model has a few significant steps,which first apply the pre-processing method for the whole dataset to convert Neuroimaging Informatics Technology Initiative(NIFTI)volumes into the 3D NumPy *** the second step,the proposed model adopts U-Net deep learning segmentation algorithm with an improved layered structure and sets the updated *** the third step,the proposed model uses state-of-the-art Medical Image Computing and Computer-Assisted Intervention(MICCAI)BRATS 2018 dataset withMRI modalities such as T1,T1Gd,T2,and Fluidattenuated inversion recovery(FLAIR).Tumour types in MRI images are classified according to the tumour *** of these masses carried by state-of-the-art approaches such that the first is enhancing tumour(label 4),edema(label 2),necrotic and non-enhancing tumour core(label 1),and the remaining region is label 0 such that edema(whole tumour),necrosis and *** proposed model is evaluated and gets the Dice Coefficient(DSC)value for High-grade glioma(HGG)volumes for their test set-a,test set-b,and test set-c 0.9795, 0.9855 and 0.9793, respectively.

关键词： Brain tumour segmentation magnetic resonance images modalities dice coefficient low-grade glioma U-Net

Intrinsic ferromagnetism in CoBr2 nanolayers:a DFT+U and Monte Carlo study

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Communications in Theoretical Physics 2021年第11期73卷 165-170页

作者： a jabar R Masrour G Kadim M Hamedoun A Hourmatallah N Benzakour A Rezzouk K Bouslykhane J Kharbach Laboratory of Solid Physics Faculty of Sciences Dhar El MahrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco MAScIR Institute of Nanomaterials and NanotechnologiesRabatMorocco Equipe de Physique du Solide Laboratoire LIPIEcole Normale SupérieureBensoudaBP 5206FèsMorocco

The intrinsic ferromagnetism of CoBr2 bulk was investigated using DFT(density functional theory)combined with the full potential linear augmented plane wave method and Monte Carlo *** ground state of CoBr2 exhibits ferromagnetic behavior and a semiconductor *** used the generalized gradient approximation(GGA)and GGA+U(Hubbard correction)approximations to determinate the magnetic *** magnetic moment reached the experimental value and was in good agreement with the other theoretical *** value obtained was used as an input to a Monte Carlo study to calculate the thermal magnetization and magnetic hysteresis *** behavior was observed and was found to be due to an positive exchange *** results lead us to believe that this material could be a promising spintronic material.

关键词： CoBr2 nanolayer DFT Monte Carlo transition temperature magnetic hysteresis cycles