3,084 research outputs found
B-decay CP-asymmetries in SUSY with a U(2)3 flavour symmetry
No full textWe study CP asymmetries in rare B decays within supersymmetry with a U(2)(3) flavour symmetry, motivated by the SUSY flavour and CP problems, the hierarchies in the Yukawa couplings and the absence so far of any direct evidence for SUSY. Even in the absence of flavour-blind phases, we find potentially sizable CP violating contributions to b -> s decay amplitudes. The effects in the mixing-induced CP asymmetries in B -> phi K(S) and B -> eta'K(S), angular CP asymmetries in B -> K*mu(+)mu(-) and the direct CP asymmetry in B -> X(s)gamma can be in the region to be probed by LHCb and next generation B factories. At the same time, these effects in B decays are compatible with CP violating contributions to meson mixing, including a non-standard B(s) mixing phase hinted by current tensions in the CKM fit mostly between S(psi KS), epsilon(K) and Delta M(Bs)/Delta M(Bd).We study CP asymmetries in rare B decays within supersymmetry with a U(2)3 flavour symmetry, motivated by the SUSY flavour and CP problems, the hierarchies in the Yukawa couplings and the absence so far of any direct evidence for SUSY. Even in the absence of flavour-blind phases, we find potentially sizable CP violating contributions to b → s decay amplitudes. The effects in the mixing-induced CP asymmetries in B → øK(S) and B → ήK(S), angular CP asymmetries in B → K*μ+μ- and the direct CP asymmetry in B → X(s)γ can be in the region to be probed by LHCb and next generation B factories. At the same time, these effects in B decays are compatible with CP violating contributions to meson mixing, including a non-standard B(s) mixing phase hinted by current tensions in the CKM fit mostly between Sψ(psi)K(S), ∈K and ∆M(B)(s))/∆M(B)(d))
Non-homogeneous thermal boundary conditions in low Prandtl number pipe flows
No full textThe effect of non-homogeneous thermal boundary conditions on temperature statistics in low Prandtl number turbulent pipe flows is studied numerically via direct numerical simulations. Two wall heat flux distributions, varying in azimuthal direction and motivated by concentrated solar power systems, are prescribed and their influence on the thermal field is presented. As a reference, also homogeneous thermal boundary conditions are simulated and compared the the non-homogeneous ones. The influence of the azimuthal variation of prescribed wall heat flux is assessed in terms of instantaneous velocity and temperature fields, local and global Nusselt numbers, averaged temperature distributions and the turbulent thermal diffusivity. The global Nusselt number appears to be unaffected by the thermal boundary conditions, whereas the local Nusselt number deviates appreciably
Vestalenula cylindrica Straub 1952
No full text<i>Vestalenula cylindrica</i> Straub, 1952 <p>(Figure 10E–H)</p> <i>Darwinula cylindrica</i> Straub, 1952 <p> <i>Vestalenula cylindrica</i> (Straub, 1952) <i>nov. comb.</i> Janz et al. 2001</p> <p> <i>Vestalenula</i> sp. – Smith and Kamiya, 2008</p> <i>Remarks</i> <p> With a height/length ratio of 0.45, and a Gm claw on the antenna that is about 50% the length of claw GM, this species most closely resembles <i>Vestalenula cylindrica</i>, which has previously been reported from Korea (Chang et al. 2012). However, the keel on the right valve is relatively short, at about 18% of the length of the valve (Figure 10G), more similar to the keel of <i>Vestalenula cornelia</i> (see Smith et al. 2006). This apparent overlapping of characters of two species could indicate that there are unrecognized cryptic species within the genus, or that these characters are more plastic than previously assumed. Without a detailed statistical analysis of the amount of variation of features within the genus (which requires additional material), this issue cannot be currently resolved. <i>Vestalenula cylindrica</i> was found in one sample during our surveys, collected from a marsh (locality 25).</p> <p> Superfamily <b>TERRESTRICYTHEROIDEA</b> Schornikov, 1969 Family <b>TERRESTRICYTHERIDAE</b> Schornikov, 1969</p>Published as part of <i>Smith, Robin James, Lee, Jimin & Chang, Cheon Young, 2014, Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species, pp. 37-76 in Journal of Natural History 49 (1)</i> on page 68, DOI: 10.1080/00222933.2014.946110, <a href="http://zenodo.org/record/4002512">http://zenodo.org/record/4002512</a>
B-decay CP-asymmetries in SUSY with a U(2^)3 flavour symmetry
No full textWe study CP asymmetries in rare B decays within supersymmetry with a U(2)3 flavour symmetry, motivated by the SUSY flavour and CP problems, the hierarchies in the Yukawa couplings and the absence so far of any direct evidence for SUSY. Even in the absence of flavour-blind phases, we find potentially sizable CP violating contributions to b -> s decay amplitudes. The effects in the mixing-induced CP asymmetries in B -> φKS and B -> η'Ks, angular CP asymmetries in B -> K* μ+ μT and the direct CP asymmetry in B -> Xs γ can be in the region to be probed by LHCb and next generation B factories. At the same time, these effects in B decays are compatible with CP violating contributions to meson mixing, including a non-standard Bs mixing phase hinted by current tensions in the CKM fit mostly between SψKS,Єk and ∆MBs/∆MBd
Vestalenula cylindrica Straub 1952, n. sp.
No full text<i>Vestalenula cylindrica</i> Straub, 1952 <p>(Fig 7 H–K)</p> <p> 1952 <i>Darwinula cylindrica</i> <b>n. sp.</b> —Straub: 497, figs 19–20.</p> <p> <i>nov. comb.</i> 2001 <i>Vestalenula cylindrica</i> (Straub, 1952) —Janz <i>et al.</i>: 185, pl. 3 (22–26). 2008 <i>Vestalenula</i> sp.—Smith & Kamiya: 275–302, figs 15–17.</p> <p> <b>Material examined.</b> Five females from wet sediment below water seeping down a near vertical rock face at Oksan-ri, Dalsan-myeon, Yeongdeok-gun, Gyeongsangbuk-do (36º20′38.4″N, 129º16′28.8″E) (locality 5 on Fig. 1), 5 June 2011.</p> <p> <b>Remarks.</b> The lateral view of the carapace (height:length ratio = 0.44–0.47) and relative length of the keel on the right valve (ca. 26% of length of right valve) of the Korean specimens closely match <i>Vestalenula cylindrica</i> from Japan. However, the Korean specimens are notable in two ways: they are smaller (length 400–438 µm for Korean specimens, 461–481 for Japanese specimens), and the <i>Gm</i> claw on the antenna is relatively longer (ca. 75% the length of <i>GM</i>, compared with ca. 50% of <i>GM</i> for Japanese <i>V. cylindrica</i>). Previously, only one living population of <i>V. cylindrica</i> was known, in Lake Biwa, Japan, although fossils of this species have been recovered in Europe and the Middle East (<i>see</i> Smith & Janz 2009 for review of fossil records).</p>Published as part of <i>Chang, Cheon Young, Lee, Jimin & Smith, Robin J., 2012, Nonmarine ostracods (Crustacea) from South Korea, including a description of a new species of Tanycypris Triebel (Cyprididae, Cypricercinae), pp. 1-19 in Zootaxa 3161</i> on page 16, DOI: <a href="http://zenodo.org/record/214227">10.5281/zenodo.214227</a>
CP violation in supersymmetry with Effective Minimal Flavour Violation
No full textWe analyze CP violation in supersymmetry with Effective Minimal Flavour Violation, as recently proposed in [1]. Unlike the case of standard Minimal Flavour Violation, we show that all the phases allowed by the flavour symmetry can be sizable without violating existing Electric Dipole Moment constraints, thus solving the SUSY CP problem. The EDMs at one and two loops are precisely analyzed as well as their correlations with the expected CP asymmetries in B physics
b->sll global fits and theoretical uncertainties
No full textb->sll global fits and theoretical uncertainties</p
Quantitative determination of steroid hormone receptor positive cells in the synovium of patients with rheumatoid arthritis and osteoarthritis: is there a link to inflammation?
No full textBackground: Steroid hormone receptors such as glucocorticoid receptors, androgen receptors, and oestrogen receptors alpha (ER alpha) and beta (ER beta) have been identified in synovial cells of patients with rheumatoid arthritis and osteoarthritis. Objectives: To find a quantitative relationship between the number of receptor positive cells and markers of inflammation, and to compare the two groups of patients with rheumatoid arthritis and osteoarthritis. Methods: A total of 36 patients with rheumatoid arthritis (n = 17) and osteoarthritis (n = 19) were included, and receptor positive cells and cellular markers of synovial inflammation were quantified by immunohistochemistry and ELISA (interleukin 6 (IL6) and IL8). Results: Patients with rheumatoid arthritis showed a higher degree of histologically determined inflammation compared with those with osteoarthritis. However, synovial density of gluco-corticoid receptor positive (GR+), androgen receptor positive (AR+), ER alpha+ and ER beta+ cells were not different among patients with rheumatoid arthritis and osteoarthritis. In patients with osteoarthritis, the density of GR+ cells positively correlated with the density of AR+, ERa+ and ERb+ cells (p = 0.007), which was not observed in patients with rheumatoid arthritis. This indicates positively coupled steroid hormone receptor expression in patients with osteoarthritis but not in those with rheumatoid arthritis. In patients with rheumatoid arthritis, secretion of synovial IL6 and IL8 positively correlated with the density of ERa+ and ERb+ cells ( not with gluco-corticoid receptor and androgen receptor), which was not found in the synovium of patients with osteoarthritis. This indicates that inflammatory factors might up regulate the expression of oestrogen receptors in patients with rheumatoid arthritis, or vice versa. Conclusions: In patients with osteoarthritis, expression of different steroid receptors is positively coupled, which was not observed in the synovium of patients with rheumatoid arthritis. This uncoupling phenomenon in rheumatoid arthritis might lead to an imbalance of the normal synovial homeostasis
Diastereomeric chiral diphosphine chioro(η5-cyclopentadienyl)ruthenium(II) complexes and the crystal structure of [(S)RuCl(η5-C5H5)(R)Ph 2PCH(Me)CH2PPh2]
No full textDiastereomeric [RuCl(η5-C5H5)Ph2PCH(R)CH 2PPh2] chelate complexes (where R = CH3, cyclo-C6H11, or C6H5) form in nearly equimolar amounts in the displacement reaction of triphenylphosphine from [RuCl(η5-C5H5)(PPh3) 2]. The diastereomers were separated by fractional crystallization. Diastereomeric composition at the equilibrium showed a low asymmetric induction (28-41%) by the optically active diphosphine ligand on the chiral ruthenium atom. The absolute configuration at the ruthenium atom has little influence on the chiroptical properties of the complexes, which appear to be dominated, at least in the visible region, by the chiral conformation of the chelate ligand. The crystal structure of the title diastereomer, [(S)RuCl(η5-C5H5)(R)Ph 2PCH(Me)CH2PPh2], has been investigated. It is monoclinic, space group P21, with a = 9.688(3), b = 15.037(4), c = 10.556(2) Å, β = 113.54(2)°, and Z = 2. The structure was solved by Patterson and Fourier methods, and refined by least squares on the basis of 2 000 significant counter data, to a final R value of 0.042. The complex shows a distorted λ conformation of the diphosphine ligand in the chelate five-membered ring, in the solid state. The Ru-Cl and Ru-P interactions are 2.444(2) and 2.277 Å (mean value), respectively
The influence of thermal boundary conditions on turbulent forced convection pipe flow at two Prandtl numbers
No full textDifferent types of thermal boundary conditions are conceivable in numerical simulations of convective heat transfer problems. Isoflux, isothermal and a mixed-type boundary condition are compared by means of direct numerical simulations (for the lowest Reynolds number) and well-resolved large-eddy simulations of a turbulent forced convection pipe flow over a range of bulk Reynolds numbers from Reb=5300 to Reb=37700, at two Prandtl numbers, i.e. Pr=0.71 and Pr=0.025. It is found that, while for Pr=0.71 the Nusselt number is hardly affected by the type of thermal boundary condition, for Pr=0.025 the isothermal boundary condition yields ≈20% lower Nusselt numbers compared to isoflux and mixed-type over the whole range of Reynolds numbers. A decomposition of the Nusselt number is derived. In particular, we decompose it into four contributions: laminar, radial and streamwise turbulent heat flux as well as a contribution due to the turbulent velocity field. For Pr=0.71 the contribution due to the radial turbulent heat flux is dominant, whereas for Pr=0.025 the contribution due to the turbulent velocity field is dominant. Only at a moderately high Reynolds number, such as Reb=37700, both turbulent contributions are of similar magnitude. A comparison of first- and second-order thermal statistics between the different types of thermal boundary conditions shows that the statistics are not only influenced in the near-wall region but also in the core region of the flow. Power spectral densities illustrate large thermal structures in low-Prandtl-number fluids as well as thermal structures located right at the wall, only present for the isoflux boundary condition. A database including the first- and second-order statistics together with individual contributions to the budget equations of the temperature variance and turbulent heat fluxes is hosted in the open access repository KITopen (DOI:https://doi.org/10.5445/IR/1000096346)
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