Inhomogeneous Bulk Viscous Fluid Universe with Electromagnetic Field and Variable Λ\Lambda-Term

Cylindrically symmetric inhomogeneous cosmological model for bulk viscous fluid distribution with electromagnetic field is obtained. The source of the magnetic field is due to an electric current produced along the z-axis. $F_{12}$ is the non-vanishing component of electromagnetic field tensor. To get the deterministic solution, it has been assumed that the expansion $\theta$ in the model is proportional to the shear $\sigma$. The values of cosmological constant for these models are found to be small and positive at late time, which are consistent with the results from recent supernovae Ia observations. Physical and geometric aspects of the models are also discussed in presence and absence of magnetic field.Comment: 21 pages, 8 figure

Solving the Mapping Problem in User Interface Design by Seamless Integration in IdealXML

Abstract. The mapping problem has been defined as the way to map models involved throughout the development life cycle of user interfaces. Model-based design of user interfaces has followed a long tradition of establishing models and maintaining mappings between them. This paper introduces a formal definition of potential mappings between models with its corresponding syntax so as to create a uniform and integrated framework for adding, removing, and modifying mappings throughout the development life cycle. For the first time, the mappings can be established from any source model to any target model, one or many, in the same formalism. Those models include task, domain, presentation, dialog, and context of use, which is itself decomposed into user, platform, and environment. IDEALXML consists of a Java application allowing the designer to edit any model at any time, and any element of any model, but also to establish a set of mappings, either manually or automatically based on a mapping model.

Quantum phase transitions and coherent tunneling in a bilayer of ultracold atoms with dipole interactions

We study the quantum phase transitions and coherent tunneling in bilayer ultracold bosonic atoms with dipolar interactions at total filling factor nu(T) = 1/2. We demonstrate that, due to the unique characters of the dipole interactions, the ground state of the system may undergo paired quantum Hall state (PQH), dimer quantum-Hall state (DQH), and super-counter-fluidity phase (SCF) by tuning the dipole strength. The SCF state which breaks the easy-plane U(1) symmetry is of particular interest because it can exhibit interlayer coherent tuneling in the incompressible quantum-Hall (QH) state. We suggest that this coherent tunneling current could be observed directly in future experiments.Physics, Condensed MatterSCI(E)EI0ARTICLE6null8

Measurement of the charged multiplicity of Z0 ---> b anti-b events

Using an impact parameter tag to select an enriched sample of Z0 --> bbBAR events, we have measured the difference between the average charged multiplicity of Z0 --> bbBAR and Z0 --> hadrons to be n(b)BAR-n(had)BAR=2.24 +/- 0.30(stat) +/- 0.33(syst) tracks per event. From this, we have derived n(b)BAR-n(uds)BAR=3.31 +/- 0.41 +/- 0.79. Comparing this measurement with those at lower center-of-mass energies, we find no evidence that n(b)BAR-n(uds)BAR depends on energy. This result is in agreement with a precise prediction of perturbative QCD, and supports the notion that QCD remains asymptotically free down to the scale M(b)2

Pacioli's double entry – part of an intellectual and social movement

Our research contains unashamedly speculations about Pacioli, and his Renaissance heroes. It seeks to codify prior research which has speculated on many aspects of Fra Luca Pacioli's (1445–c.1517) life. Regarding teaching, not surprisingly, most students are less than enthused by the experience of being taught double-entry bookkeeping (DEB) as a mechanical exercise. The focus on control in many research papers has misplaced emphasis on the origins of DEB, generally ignoring the socio-economic and intellectual contexts in which it was forged. This study speculates on DEB's intellectual foundations, namely perspective, proportionality, harmony, order and balance captured in the Venetian form of DEB. By emphasising DEB's recourse to these aspects, it is placed in Renaissance Italy's fifteenth- and sixteenth-century intellectual and social movement. Academics including Bryer have suggested that a broader notion of financial accountability is appropriate. We concur. Accountability is generally a missing dimension in DEB teaching and related research. A major complaint in the aftermath of the Global Financial Crisis (GFC) levelled at the banks, and their shadow banking arms in particular, is that their group accounting failed ‘to tell it how it actually was’ – that is, it failed to truly account. Companies were unaccountable. The ‘morality’ of audited accounting with a lack of corporate accountability, namely its recourse to truth, balance, proportionality of the kind the Renaissance players sought, was certainly absent during the GFC