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Chinese Physics B 2014年第7期23卷 417-428页

作者： H r Baghshahi m k Tavassoly A Behjat Atomic and molecular Group Faculty of PhysicsYazd University The Laboratory of Quantum Information Processing Yazd University Depar.m.nt of Physics Faculty of ScienceVali-e-Asr University of Rafsanjan Photonics research Group Engineering Research CenterYazd University

The interaction between a two-level atom and a single-mode field in the k-photon Jaynes-Cummings model （JCm） in the presence of the Stark shift and a kerr.m.dium is studied. All terms in the Hamiltonian, such as the single-mode field, its interaction with the atom, the contribution of the Stark shift and the kerr.m.dium effects are considered to be f-deformed. In particular, the effect of the initial state of the radiation field on the dynamical evolution of some physical properties such as atomic inversion and entropy squeezing are investigated by considering different initial field states （coherent, squeezed and thermal states）.

关键词： Jaynes-Cummings model entropy squeezing atomic inversion intensity-dependent coupling

Petrology, geochemistry, radioactivity, and m–W type rare earth element tetrads of El Sela altered granites, south eastern desert,Egypt

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Acta Geochimica 2019年第1期38卷 95-119页

作者： A.m.El mezayen m.A.Heikal m.G.El-Feky H.A.Shahin I.k.Abu Zeid S.r.Lasheen Geology Depar.m.nt Faculty of Science Al Azhar University Nuclear.m.terial Authority

The southern part of the Eastern Desert of Egypt—about 30 km southwest of Abu-r.m.d city—is mainly covered by ophiolitic rocks(Sul Hamed), island arc assemblage, younger granites(muscovite granites of Qash Amer and two mica granites of El Sela), and various acidic and basic dikes. Field, petrological, and geochemical studies indicate that the El Sela shear zone has been subject to hydrothermal and supergene alteration such as kaolinization, albitization, sericitization, and hematitization. It is invaded by quartz ENE–WSW veins associated with hydrothermal alteration accompanied by radioactive mineralization. The investigated younger granitic rocks had very low contents of compatible elements, such as Cr, Ni,and Co; and high contents of incompatible elements, such as Zr, and large ion lithophiles, such as Sr, especially in the El Sela shear zone. major oxide and trace element analyses revealed calc-alkaline affinity and peraluminous *** highly differentiated granitic rocks' lower Zr/Hf and higher Y/Ho than the normal ratio are consistent with hydrothermal alteration. most samples had rare earth element(rEE)-patterns with an m-type tetrad effect in the first and fourth segments and a W-type tetrad in the third segment. The average ∑rEE in the studied granites was lower than the world granite average; the ratio of light to heavy rEEs greater. The main radioactive, uranium-bearing, and uraniferous Fe and mn minerals are uranothorite,autunite, uranophane and autunite as compounds, kasolite,columbite, xenotime, uranophane-bearing zircon and jarosite, silver-bearing pyrite, hematite, and autunite-bearing pyrolusite.

关键词： Geochemistry rEE-tetrad effect radioactive minerals radiometric measur.m.nts Qash Amer El Sela

Structural,Dielectric and Complex Impedance Spectroscopy Studies of Lead Free Ca_(0.5+x)Nd_(0.5-x)(Ti_(0.5)Fe_(0.5))O_3

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Journal of materials Science & Technology 2013年第4期29卷 323-329页

作者： m.r.Shah A.k.m.Akther Hossain Depar.m.nt of Physics University of PrimeasiaBananiDhaka 1213Bangladesh Depar.m.nt of Physics Bangladesh University of Engineering and TechnologyDhaka 1000Bangladesh

Structural and various electrical properties of polycrystalline Ca0.5＋xNd0,5-x（Ti0.5Fe0.5）O3, prepared by standard solid state reaction technique, were studied. Formation of single phase orthorhombic structure of the compositions was confirmed by X-ray diffraction study. The composition dependence of lattice par.m.ters, density and microstructural study show that they vary significantly with Ca content. The dielectric measur.m.nts were carried out at room temperature as function of frequency and composition. The exper.m.ntal results reveal that the dielectric constant （ε′） increases with increasing Ca content. Similar behavior is observed for the dielectric loss （tanδ） and ac conductivity （σac）. In complex impedance analysis it is observed that the real part （Z′） vs imaginary part （Z″） graph exhibits a tendency of formation of a single semicircular arc for each composition of samples. Different par.m.ters were determined by fitting the exper.m.ntal data in Cole-Cole empirical formula. A dominance of grain boundary resistance （rgb） is observed. The rgb decreases with increasing Ca content. The high ε′ observed in present samples are suitable for fabrication of devices.

关键词： Crystal structure Dielectric properties Lead free Perovskite Solid state reaction

Finite cell method compared to h-version finite element method for elasto-plastic problems

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Applied mathematics and mechanics(English Edition) 2014年第10期35卷 1239-1248页

作者： A.ABEDIAN J.PArVIZIAN A.Dster E.rANk Depar.m.nt of mechanical Engineering Daneshpajoohan Higher Education Institute Depar.m.nt of mechanical Engineering Isfahan University of Technology Numerische Strukturanalyse mit Anwendungen in der Schiffstechnik (m-10) Technische Universitt Hamburg-Harburg Lehrstuhl fr Computation in Engineering Fakultt fr Bauingenieur-und Vermessungswesen Technische Universitt Mnchen

The finite cell method （FCm） combines the high-order finite element method （FEm） with the fictitious domain approach for the purpose of simple meshing. In the present study, the FCm is used to the Prandtl-reuss flow theory of plasticity, and the results are compared with the h-version finite element method （h-FEm）. The numerical results show that the FCm is more efficient compared to the h-FEm for elasto-plastic problems, although the mesh does not conform to the boundary. It is also demonstrated that the FCm performs well for elasto-plastic loading and unloading.

关键词： finite cell method (FCm) h-version finite element method (h-FEm),Prandtl-reuss quadtree octree

Organic micro-pollutant r.m.val in liquid-phase using carbonized silk cotton hull

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Journal of Environmental Sciences 2008年第9期20卷 1046-1054页

作者： m Sathishkumar A r Binupriya D kavitha r Selvakumar k k Sheema J G Choi Depar.m.nt of Food Science and Technology Institute of Agricultural Science and Technology Chonbuk National University Depar.m.nt of Chemical Engineering Yonsei University Depar.m.nt of Biotechnology Bharathiar University Depar.m.nt of Plant biology and Biotechnology Government Arts College National Agricultural Products Quality management Services

Phenolic compounds constitute one of the major pollutants in the modern world. Although many physical and chemical treatment technologies for their r.m.val exist, most of them are economically not feasible. The present study was aimed at using silk cotton hull, a potent agricultural waste as an adsobent for r.m.val of 2,4-dichlorophenol (2,4-DCP), which was used as a model phenolic compound. The process par.m.ters were investigated and optimized conditions were determined. The equilibrium time was found to ...

关键词： silk cotton hull carbon adsorption 2 4-DCP temperature kinetic study

Band structure,Fermi surface,elastic,thermodynamic,and optical properties of AlZr3,AlCu3,and AlCu2Zr:First-principles study

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Chinese Physics B 2016年第8期25卷 103-112页

作者： Parvin r Parvin F Ali m S Islam A k m A Depar.m.nt of Physics Rajshahi University Rajshahi-6205 Bangladesh Depar.m.nt of Physics Pabna University of Science and Technology Pabna 6600 Bangladesh International Islamic University Chittagong 154/A College Road Chittagong-4203 Bangladesh

The electronic properties（Fermi surface,band structure,and density of states（DOS）） of Al-based alloys Alm3（m=Zr and Cu） and AlCu2Zr are investigated using the first-principles pseudopotential plane wave method within the generalized gradient approximation（GGA）.The structural par.m.ters and elastic constants are evaluated and compared with other available ***,the pressure dependences of mechanical properties of the compounds are *** temperature dependence of adiabatic bulk modulus,Debye temperature,specific heat,thermal expansion coefficient,entropy,and internal energy are all obtained for the first time through quasi-harmonic Debye model with phononic effects for T = 0 k-100 *** par.m.ters of optical properties（dielectric functions,refractive index,extinction coefficient,absorption spectr.m.conductivity,energy-loss spectr.m.and reflectivity） of the compounds are calculated and discussed for the first *** reflectivities of the materials are quite high in the Ir-visible-UV region up to ~ 15 eV,showing that they pr.m.se to be good coating materials to avoid solar *** of the properties are also compared with those of the Al-based Ni3 Al compound.

关键词： first principle calculations Fermi surface elastic moduli entropy and internal energy optical properties

Damage and geological assessment of the 18 September 2011 m_w 6.9 earthquake in Sikkim,India using very high resolution satellite data

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Geoscience Frontiers 2015年第6期6卷 793-805页

作者： Tapas r.m.rtha k.Babu Govindharaj k.Vinod kumar National r.m.te Sensing Centre(NrSC) Indian Space Research Organisation(ISRO)

Post-disaster very high resolution（VHr） satellite data are potential sources to provide detailed information on damage and geological changes for a large area in a short *** this paper,we studied landslides triggered by the m_w 6.9 earthquake in Sikkim,India which occurred on 18 September 2011 using VHr data fr.m.Cartosat-1,GeoEye-1,QuickBird-2 and WorldView-2 *** the earthquake-affected area is located in mostly inaccessible Himalayan terrain,VHr data fr.m.these satellites provided a unique opportunity for quick and synoptic assessment of the *** visual change analysis technique through comparison of pre- and post-earthquake images,we assessed the damage caused by the event.A total of 123 images acquired fr.m.eight satellites,covering an area of4105 km2 were analysed and 1196 new landslides triggered by the earthquake were *** blockages and severely affected villages were also *** assessment of the terrain highlighted linear disposition of landslides along existing fault scarps,suggesting a reactivation of *** landslide inventory map prepared fr.m.VHr images also showed a good correlation with the earthquake shake *** showed that several parts of north Sikkim,particularly mangan and Chungthang,which are close to the epicentre,were severely affected by the earthquake,and that the event-based landslide inventory map can be used in future earthquake-triggered landslide susceptibility assessment studies.

关键词： International Charter Damage Landslide Fault VHr Disaster

Influence of Lanthanum on the microstructural and Dielectric Properties of Polycrystalline Ba(Ti0.5Fe0.5)O3

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Chinese Physics Letters 2012年第4期29卷 213-216页

作者： m.r.Shah A.k.m.Akther Hossain Depar.m.nt of Physics Primeasia UniversityBananiDhaka-1213Bangladesh Depar.m.nt of Physics Bangladesh University of Engineering and TechnologyDhaka-1000Bangladesh

Various polycrystalline Ba1-x Lax (Ti0.5 Fe0.5 )O3 are prepared by using the standard solid state reaction *** shaped samples prepared fr.m.each composition are sintered at 1200℃ for 5 h.X-ray diffraction patterns of these compositions confirm the formation of a single phase perovskite *** lattice par.m.ters are decreased but the average grain size increases with the increase of La *** dielectric constant,dielectric loss and ac conductivity are studied as a function of frequency for various compositions,and their behaviors are explained on the basis of the maxwell-Wagner.m.del A three-times enhancement of the dielectric constant is observed with the increase of La content.

关键词： Ti structure technique

response of soil bacterial community to biochar application in a boreal pine forest

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Journal of Forestry research 2023年第3期34卷 749-759页

作者： Yan Ge Xiao-li Li marjo Palviainen Xuan Zhou Jussi Heinonsalo Frank Berninger Jukka Pumpanen kajar köster Hui Sun Collaborative Innovation Center of Sustainable Forestry in Southern China College of ForestryNanjing Forestry UniversityNanjing 210037China Depar.m.nt of Forest Sciences University of HelsinkiLatokartanonkaari 7P.O.Box 2700014 HelsinkiFinland Depar.m.nt of Environmental and Biological Sciences University of Eastern FinlandYliopistonranta 1 EP.O.Box 162770211 KuopioFinland

Boreal forests commonly suff er fr.m.nitrogen defi ciency due to low rate of nitrogen *** may pr.m.te soil organic matter decomposition and accelerate nitrogen *** this study,Illumina NovaSeq sequencing combined with functional annotation of prokaryotic taxa(FAPrOTAX)analysis was used to investigate the eff ect of biochar pyrolysis temperatures,the amount of applied biochar,and the period since the biochar application(2-and 3-year)on soil bacterial *** results show that biochar pyrolysis temperatures(500℃ and 650℃)and the amount of applied biochar(0.5 kg m^(−2)and 1.0 kg m^(−2))did not change soil ***,the interaction of biochar pyrolysis temperature and the amount had signifi cant eff ects on bacterial species richness and evenness(Pr produced at 500℃ had a lower abundance of Actinobacteria and Verrucomicrobia,while that produced at 650℃ had a higher abundance of Conexibacter and *** biochar produced at 650℃ was applied,applying 0.5 kg m^(−2)had a higher abundance of Cyanobacteria,Conexibacter,and Phenylobacterium than that of 1.0 kg m^(−2)(Pr.m.tic compound degradation group increased with the extension of application time and increase of pyrolysis *** time since application played an important role in the formation of soil bacterial communities and their functional ***-term studies are necessary to understand the consequence of biochar on bacterial communities in boreal forests.

关键词： Biochar application Bacterial communities Community function Boreal pine forests

Influence of pH of spray solution on optoelectronic properties of cadmium oxide thin films

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Journal of Semiconductors 2015年第3期36卷 29-34页

作者： r.m.Hodlur.m.k.rabinal Depar.m.nt of Physics Karnatak University

Highly conducting transparent cadmium oxide thin films were prepared by the conventional spray pyrolysis technique. The pH of the spray solution is varied by adding ammonia/hydrochloric acid. The effect of pH on the morphology, crystallinity and optoelectronic properties of these films is studied. The structural analysis showed all the films in the cubic phase. For the films with pH 〈 7（acidic condition）, the preferred orientation is along the（111） direction and for those with pH 〉7（alkaline condition）, the preferred orientation is along the（200） direction.A lowest resistivity of 9.9×10^4 cm（with carrier concentration D5.1×10^20cm^3, mobility D12.4 cm^2/（V s））is observed for pH12. The resistivity is tuned almost by three orders of magnitude by controlling the bath pH with optical transmittance more than 70%. Thus, the electrical conductivity of CdO films could be easily tuned by simply varying the pH of the spray solution without compr.m.sing the optical transparency.

关键词： spray pyrolysis pH cadmium oxide thin films electrical conductivity