Quantum Discord for Generalized Bloch Sphere States

In this study for particular states of bipartite quantum system in 2n?2m dimensional Hilbert space state, similar to m or n-qubit density matrices represented in Bloch sphere we call them generalized Bloch sphere states(GBSS), we give an efficient optimization procedure so that analytic evaluation of quantum discord can be performed. Using this optimization procedure, we find an exact analytical formula for the optimum positive operator valued measure (POVM) that maximize the measure of the classical correlation for these states. The presented optimization procedure also is used to show that for any concave entropy function the same POVMs are sufficient for quantum discord of mentioned states. Furthermore, We show that such optimization procedure can be used to calculate the geometric measure of quantum discord (GMQD) and then an explicit formula for GMQD is given. Finally, a complete geometric view is presented for quantum discord of GBSS. Keywords: Quantum Discord, Generalized Bloch Sphere States, Dirac matrices, Bipartite Quantum System. PACs Index: 03.67.-a, 03.65.Ta, 03.65.UdComment: 26 pages. arXiv admin note: text overlap with arXiv:1107.5174 by other author

Electrically driven convection in a thin annular film undergoing circular Couette flow

We investigate the linear stability of a thin, suspended, annular film of conducting fluid with a voltage difference applied between its inner and outer edges. For a sufficiently large voltage, such a film is unstable to radially-driven electroconvection due to charges which develop on its free surfaces. The film can also be subjected to a Couette shear by rotating its inner edge. This combination is experimentally realized using films of smectic A liquid crystals. In the absence of shear, the convective flow consists of a stationary, azimuthally one-dimensional pattern of symmetric, counter-rotating vortex pairs. When Couette flow is applied, an azimuthally traveling pattern results. When viewed in a co-rotating frame, the traveling pattern consists of pairs of asymmetric vortices. We calculate the neutral stability boundary for arbitrary radius ratio $\alpha$ and Reynolds number ${{\cal R} e}$ of the shear flow, and obtain the critical control parameter ${\cal R}_c (\alpha, {{\cal R} e})$ and the critical azimuthal mode number ${m_c (\alpha, {{\cal R} e})}$. The Couette flow suppresses the onset of electroconvection, so that ${\cal R}_c (\alpha, {{\cal R} e}) > {\cal R}_c (\alpha,0)$. The calculated suppression is compared with experiments performed at $\alpha = 0.56$ and $0 \leq {{\cal R} e} \leq 0.22$.Comment: 17 pages, 2 column with 9 included eps figures. See also http://mobydick.physics.utoronto.c

The impact of organisational justice on ethical behaviour

YesWithin the workplace, justice is influenced by the interpersonal relationships between colleagues and/or management among other things. The main reason for this research is to examine the correlation between organisational justice and the ethical behaviour of employees. Based on the literature, the conceptual model developed in this paper integrates distributive, procedural, interpersonal and informational justice in relation to ethical behaviour. By applying an adapted survey questionnaire, data were collected from teaching staff at public sector higher education institutions. Multiple regression analysis was applied to 360 samples and this showed that distributive and procedural justice have a more positive and significant impact than informational and interpersonal justice on the ethical behaviour of employees. This is an empirical study which may contribute to the literature on ethical behaviour, organisational development and employee development

EXTENDED MODELLING AND NUMERICAL INVESTIGATION OF PHASED ARRAY SYNTHETIC JET CROSS-FLOW INTERACTIONS

A classical analysis of incompressible unsteady Navier-Stokes equation have been under discussion for a long time by various reasearchers, it has been found that the exact analytical unique solution existed only below and undefined Reynolds number limit. Several solutions were existed for a range of Reynolds number above the limit, and that has no solution exsisted above the second undefined Reynolds number (i.e, solution enter into turbulent region and one has to solve another set of equations for turbulance). A useful study was done for two dimensional unsteady incompressible flow in which vorticity is propotional to stream function perturbed by uniform stream. Recently this unsteady sloution was used to analyse the flow behaviour on flat plate using Synthetic Jet Actuators (SJA) which consists of oscillating membrane expels in fluid through orifice. The results obtained at different time level were presented and it was found as the time progresses streamlines, on the flat plate with number of actuators placed in an array, become flatter caused rapidly decay in vortices on trailing edge. The authentication of these results were needded to be validated through experiment or numerical simulation. In this paper, an attempt has been made to solve incompressible unsteady Navier-Stokes equations numerically to analyse the behaviour of single and multiple sythetic jet actuator in a cross flow conditions. The behaviour of SJA implemented by imposing a special kind of boundary condition on the bottom of flate plate was studied. Results have been obtained for various Reynolds numbers and were presented. These numerical results were in close agreement with [1]

In vivo and in vitro phytochemical and antibacterial efficacy of Baliospermum montanum(Wïlld.) Muell. Arg.

ObjectiveTo evaluate the phytochemical and anti-bacterial potential of mother plants in vivo and in vitro derived callus of Baliospermum montanum (B. montanum) (Willd.) Muell.-Arg. leaves and root.MethodsThe in vitro derived rootlets and leaves segments of B. montanum were cut into 0.5-0.7 cm in length and cultured on Murashige and Skoog solid medium supplemented with 3% sucrose, gelled with 0.7% agar and different concentration of 2, 4-D either alone or in combinations. The preliminary phytochemical screening was performed by Harborne method. Antibacterial efficacy was performed by well diffusion method and incubated for 24 h at 37°C.ResultsThe highest percentage of callus formation (leaves segments 86.9±0.56; root segments 78.7±0.51) was obtained on Murashige and Skoog's basal medium supplemented with 3% sucrose and 2.0 mg/L of 2,4-Dichlorophenoxy acetic acid. The phytochemical study revealed the high quantity presence of steroids, triterpenoids, glycosides, saponins, alkaloids, flavanoids, phenolic compounds, tannins, sugars etc of root and leaves derived calli. The ethanol extract of leaves segment derived calli of B. montanum showed the maximum solubility and antimicrobial activity with the MIC ranged from 100 to 200 μL.ConclusionThe preliminary phytochemical study confirmed that the calli mediated tissues showed the higher percentage of metabolite constituents and extraction value compared to the in vivo leaves and roots. The present study observation suggested that a possibility to establish high yielding genotypes by in vitro culture for production of medicinally important bioactive compounds

Penerapan Metode Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) Dalam Pemilihan Tempat Pendirian Pabrik Kelapa Sawit

Penelitian ini bertujuan merancang suatu sistem pendukung keputusan sehingga dapat dijadikan sebagai solusi dalam penentuan lokasi tempat pendirian pabrik kelapa sawit dengan menerapkan model Fuzzy Multiple Atribut Decision Making (MADM) dengan metode Technique For Order Preference by Similarity to Ideal Solution (TOPSIS). Data penelitian diperoleh melalui penelitian pustaka, penelitian lapangan dan wawancara. Hasil penelitian ini menunjukkan bahwa penerapan fuzzy MADM metode TOPSIS untuk pemilihan lokasi pendirian pabrik kelapa sawit dilakukan dengan pengujian white-box dan hasilnya dinyatakan valid sehingga sistem dianggap layak untuk melakukan analisis kelayakan pemilihan lokasi pendirian pabrik kelapa sawit. Sedangkan lokasi pendirian pabrik kelapa sawit yang menjadi pilihan utama/prioritas berdasarkan hasil analisis sistem menggunakan metode TOPSIS adalah Maiwa dengan nilai preferensi total terbesar 0,8336 (Disetujui) sedangkan Cendana dengan nilai preferensi 0,5994 dan Enrekang dengan nilai preferensi 0,5745 menjadi alternatif yang dapat dipertimbangkan

Experimental assessment of a novel eutectic binary molten salt-based hexagonal boron nitride nanocomposite as a promising PCM with enhanced specific heat capacity

In this study, novel nanocomposites containing the pre-defined mass ratio of binary molten salt (NaNO3-KNO3: 60-40 wt. %) dispersed with hexagonal boron nitride (hBN) nanoparticles with nominal size of 70 nm, were prepared through one-phase preparation method. Four different types of samples including pure binary molten salt and binary molten salt-based hBN nanocomposites with loading concentrations of 0.5, 1 and 1.5 wt. % were prepared. The proposed amount of sodium nitrate and potassium nitrate was added to certain amount of DI water, comprising with 0.5, 1 and 1.5 wt. % concentration of hBN nanoparticles. Scanning electronic microscopy (SEM) was conducted to evaluate the uniformity of the synthesized binary molten salt-based hBN nanocomposites. The SEM images revealed uniform dispersion of hexagonal boron nitride nanoparticles and fractal-like structures were observed clearly. Specific heat capacity (cp) and melting temperature measurements were performed using a differential scanning calorimetry (DSC). The experimental achieved data for melting temperature proved that hexagonal boron nitride nanoparticles do not affect the melting temperature of the synthesized nanocomposites. The experimentally achieved data for the average cp values of the binary molten salt in solid and liquid phases were 1.14 and 1.13 J/g K, respectively. While, the average cp values for the binary molten salt-based hBN nanocomposite with the highest loading concentration of nanoparticles (1.5 wt. %) in solid and liquid phases were 2 and 3.17 J/g K, respectively. The measured average cp value in the liquid phase for binary molten salt-based hBN nanocomposite with the highest loading concentration (1.5 wt. %) of nanoparticles revealed enhancement of ~180% in comparison with pure binary molten salt. Thermal stability measurements expressed enhancement of thermal stability in binary molten salt induced with hBN nanoparticles. Binary molten salt-based hBN nanocomposite with loading concentration of 1.5 wt. % represented ~16% enhancement in thermal stability over the binary molten salt

Peering from the outside in: viscoelastic properties of the extracellular matrix dictate spatial organization and apoptosis resistance in mammary epithelial cells

The compliance of the extracellular matrix (ECM) differs between tissues and is altered in tumors. We examined the consequence of modifying the viscoelastic properties of the ECM on mammary epithelial cell (MEC) morphogenesis and apoptosis regulation. Results showed that the elastic modulus of the ECM exerts a profound effect on MEC tissue organization and gene expression that correlates with changes in actin organization and apoptosis resistance. Altering the rigidity of the ECM directly influences integrin expression and additionally modifies integrin-induced gene expression in association with actin reorganization. These data suggest that the compliance of the ECM may cooperatively regulate cell behavior by altering integrin function. Studies are now underway to investigate the possibility that these effects are mediated via changes in integrin-actin cytoskeletal dynamics