19,332 research outputs found

    Energy transfer, pressure tensor and heating of kinetic plasma

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    Kinetic plasma turbulence cascade spans multiple scales ranging from macroscopic fluid flow to sub-electron scales. Mechanisms that dissipate large scale energy, terminate the inertial range cascade and convert kinetic energy into heat are hotly debated. Here we revisit these puzzles using fully kinetic simulation. By performing scale-dependent spatial filtering on the Vlasov equation, we extract information at prescribed scales and introduce several energy transfer functions. This approach allows highly inhomogeneous energy cascade to be quantified as it proceeds down to kinetic scales. The pressure work, −(P⋅∇)⋅u-\left( \boldsymbol{P} \cdot \nabla \right) \cdot \boldsymbol{u}, can trigger a channel of the energy conversion between fluid flow and random motions, which is a collision-free generalization of the viscous dissipation in collisional fluid. Both the energy transfer and the pressure work are strongly correlated with velocity gradients.Comment: 28 pages, 10 figure

    Calculated Momentum Dependence of Zhang-Rice States in Transition Metal Oxides

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    Using a combination of local density functional theory and cluster exact diagonalization based dynamical mean field theory, we calculate many body electronic structures of several Mott insulating oxides including undoped high T_{c} materials. The dispersions of the lowest occupied electronic states are associated with the Zhang-Rice singlets in cuprates and with doublets, triplets, quadruplets and quintets in more general cases. Our results agree with angle resolved photoemission experiments including the decrease of the spectral weight of the Zhang--Rice band as it approaches k=0

    Nonlinear ac response of anisotropic composites

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    When a suspension consisting of dielectric particles having nonlinear characteristics is subjected to a sinusoidal (ac) field, the electrical response will in general consist of ac fields at frequencies of the higher-order harmonics. These ac responses will also be anisotropic. In this work, a self-consistent formalism has been employed to compute the induced dipole moment for suspensions in which the suspended particles have nonlinear characteristics, in an attempt to investigate the anisotropy in the ac response. The results showed that the harmonics of the induced dipole moment and the local electric field are both increased as the anisotropy increases for the longitudinal field case, while the harmonics are decreased as the anisotropy increases for the transverse field case. These results are qualitatively understood with the spectral representation. Thus, by measuring the ac responses both parallel and perpendicular to the uniaxial anisotropic axis of the field-induced structures, it is possible to perform a real-time monitoring of the field-induced aggregation process.Comment: 14 pages and 4 eps figure

    Implementasi Perda No. 12 Tahun 2001 Tentang Pemakaian Busana Melayu di Lingkungan Pendidikan, Pegawai Negeri Sipil, Swasta / Badan USAha Milik Daerah di Kantor Dinas Pendapatan Daerah Kota Pekanbaru Tahun 2014

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    All associated with social norms, religion, customs, so clothing developed with the meaning of varied. Riau especially the City of Pekanbaru, ranging from the building to the street name indentik with malay, especially government buildings and museum. Malay clothes must be used by all levels of the start of the level of education from kindergarten to Senior High School private and state that is clothed in the Malays that the model is determined by the school and used on Friday. Malay clothes using some unique motifs malay, until the Malay batik. The purpose of this research is to know the implementation of Perda No. 12 2001 at the office of Regional Income City of Pekanbaru.Research method that will be used is a research survey. The location of this research is in the office of Regional Income City of Pekanbaru located in the way the Lotus, because they see government officials have not maximum of implementing Perda No. 12 The year 2001 about malay fashion consumption in the educational environment, Civil Servants, Private/Enterprises area. The reason for the taking of research in this location is because there is no scientific research reveals the problem as noted in this research.The results of research on the implementation of the Perda No. 12 2001 at the office of Regional Income City of Pekanbaru Years 2014, including the category of good, this shows that the policy of Malay fashion consumption in the City of Pekanbaru still needs to be repaired and improved again. Should the leaders of increasing positive influence to the officials with how to give an example of an example or a good example, has authority in front of civil servants in order to grow their sense of withheld or respect
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