cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Galilei invariant theories. I. Constructions of indecomposable finite-dimensional representations of the homogeneous Galilei group: directly and via contractions
Creators: name: de Montigny, M.
name: Niederle, J.
name: Nikitin, A. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81Rxx, 81Qxx

description: All indecomposable finite-dimensional representations of the homogeneous Galilei group which when restricted to the rotation subgroup are decomposed to spin 0, 1/2 and 1 representations are constructed and classified. These representations are also obtained via contractions of the corresponding representations of the Lorentz group. Finally the obtained representations are used to derive a general Pauli anomalous interaction term and Darwin and spin-orbit couplings of a Galilean particle interacting with an external electric field.
description: 23 pages, 2 tables
PRIKAZ KNJIGE ''PUTOVANJE JEDNOG PSIHOTERAPEUTA'', AUTORKE NERMINE VEHABOVIĆ-RUDEŽ
Creators: name: Đurašković, Ivana
name: Bićanić, Jelena
name: Uredništvo Savremene Psihijatrije I Medicine
Publisher: name: Zenodo
Year: 2021
Subjects: realitetna terapija
teorija izbora
psihoterapija
prikaz
osvrt
knjiga

description: Prikaz knjige čija je autorka Nermina Vehabović-Rudež, psihoterapeut iz Bosne i Hercegovine. U knjizi je prikazan profesionalni razvoj autorke, isprepleten sa različitim životnim izazovima, uzorima koji su na nju uticali i uvidima koje je stekla tokom svog ''putovanja''.
Electronic structure and the minimum conductance of a graphene layer on SiO2 from density-functional methods.
Creators: name: Dharma-wardana, M. W. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of the SiO$_2$ substrate on a graphene film is investigated using realistic but computationally convenient energy-optimized models of the substrate supporting a layer of graphene. The electronic bands are calculated using density-functional methods for several model substrates. This provides an estimate of the substrate-charge effects on the behaviour of the bands near $E_F$, as well as a variation of the equilibrium distance of the graphene sheet. A model of a wavy graphene layer is examined as a possible candidate for understanding the nature of the minimally conducting states in graphene.
description: 6 pages, 5 figures
Nonlinear directional coupler for polychromatic light
Creators: name: Garanovich, Ivan L.
name: Sukhorukov, Andrey A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate that nonlinear directional coupler with special bending of waveguide axes can be used for all-optical switching of polychromatic light with very broad spectrum covering all visible region. The bandwidth of suggested device is enhanced five times compared to conventional couplers. Our results suggest novel opportunities for creation of all-optical logical gates and switches for polychromatic light with white-light and super-continuum spectrum.
description: 3 pages, 3 figures
Nonaffine rubber elasticity for stiff polymer networks
Creators: name: Heussinger, C.
name: Schaefer, B.
name: Frey, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a theory for the elasticity of cross-linked stiff polymer networks. Stiff polymers, unlike their flexible counterparts, are highly anisotropic elastic objects. Similar to mechanical beams stiff polymers easily deform in bending, while they are much stiffer with respect to tensile forces (``stretching''). Unlike in previous approaches, where network elasticity is derived from the stretching mode, our theory properly accounts for the soft bending response. A self-consistent effective medium approach is used to calculate the macroscopic elastic moduli starting from a microscopic characterization of the deformation field in terms of ``floppy modes'' -- low-energy bending excitations that retain a high degree of non-affinity. The length-scale characterizing the emergent non-affinity is given by the ``fiber length'' $l_f$, defined as the scale over which the polymers remain straight. The calculated scaling properties for the shear modulus are in excellent agreement with the results of recent simulations obtained in two-dimensional model networks. Furthermore, our theory can be applied to rationalize bulk rheological data in reconstituted actin networks.
description: 12 pages, 10 figures, revised Section III
Ennea Preston 1910
Creators: name: McGhie, Henry
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Stylommatophora
Streptaxidae
Ennea

description: quadrilateralis, Ennea Preston 1910a: 527; pl. 7, fig. 2. Shimbi Hills, British East Africa. Six possible syntypes EE.6165 {Spence ex Preston}. quasillus, Rissoina (Phosinella) Melvill and Standen 1896: 308; pl. 11, fig. 65. Loyalty Islands. Figured syntype EE.3769, one syntype EE.7835, 70 possible syntypes EE.8078, 23 possible syntypes EE.8079 and 3 possible syntypes EE.8080 {Hadfield}. R
description: Published as part of McGhie, Henry, 2008, Catalogue of type specimens of molluscs in the collection of The Manchester Museum, The University of Manchester, UK, pp. 1-46 in ZooKeys 4 (4) on page 28, DOI: 10.3897/zookeys.4.32, http://zenodo.org/record/576421
description: {"references": ["Preston HB (1910 a) Additions to the non-marine molluscan fauna of British and German East Africa and Lake Albert Edward. Annals and Magazine of Natural History (8 th series) 6: 526 - 536; pls. 7 - 9.", "Melvill JC, Standen R (1896) Notes on a collection of shells from Lifu and Uvea, Loyalty Islands, formed by the Rev. and Mrs. Hadfield, with list of species. Part 2. Journal of Conchology 8: 273 - 315; pls. 9 - 11, issued in Melvill and Standen 1897 a."]}
First Measurement Of The Jet Cross Section In Polarized p+p Collisions At $\sqrt{s}=200 $ GeV
Creators: name: MIller, M. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present preliminary measurements of the inclusive jet cross section in the transverse momentum region 5
description: Proceedings from PANIC 2005
Structural properties of proportional fairness: stability and insensitivity
Creators: name: Massoulié, Laurent
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K25, 68M20, 90B15 (Primary)

description: In this article we provide a novel characterization of the proportionally fair bandwidth allocation of network capacities, in terms of the Fenchel--Legendre transform of the network capacity region. We use this characterization to prove stability (i.e., ergodicity) of network dynamics under proportionally fair sharing, by exhibiting a suitable Lyapunov function. Our stability result extends previously known results to a more general model including Markovian users routing. In particular, it implies that the stability condition previously known under exponential service time distributions remains valid under so-called phase-type service time distributions. We then exhibit a modification of proportional fairness, which coincides with it in some asymptotic sense, is reversible (and thus insensitive), and has explicit stationary distribution. Finally we show that the stationary distributions under modified proportional fairness and balanced fairness, a sharing criterion proposed because of its insensitivity properties, admit the same large deviations characteristics. These results show that proportional fairness is an attractive bandwidth allocation criterion, combining the desirable properties of ease of implementation with performance and insensitivity.
description: Published at http://dx.doi.org/10.1214/105051606000000907 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Forecasting the Bayes factor of a future observation
Creators: name: Trotta, Roberto
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I present a new procedure to forecast the Bayes factor of a future observation by computing the Predictive Posterior Odds Distribution (PPOD). This can assess the power of future experiments to answer model selection questions and the probability of the outcome, and can be helpful in the context of experiment design. As an illustration, I consider a central quantity for our understanding of the cosmological concordance model, namely the scalar spectral index of primordial perturbations, n_S. I show that the Planck satellite has over 90% probability of gathering strong evidence against n_S = 1, thus conclusively disproving a scale-invariant spectrum. This result is robust with respect to a wide range of choices for the prior on n_S.
description: 7 pages, 2 figures; minor changes, updated references. Matches version accepted by MNRAS
Rhythmic Abstraction and Uninhabited Space
Creators: name: Coker, Marc
Publisher: name: University of East London
Year: 2021

description: This thesis is a reflective report and a critical analysis of the exploration and redefinition of moving image production as an independent, fine art filmmaker. Examining key elements of filmic construction within the scope of research through practice, this study has been a re-evaluation of my own audio-visual productivity. The study has led to fresh, new pathways of creativity. The ensuing work draws on traditional analogue film, including archival film footage as well as high-definition digital video. The report discusses each of the twenty-five films produced during that period, their chronological progression and the prime elements that shaped those films. At its core are seven specific films that were chosen for the final showcase. Beginning the Doctorate with a deconstruction of my former working methods, the report illustrates how, by combining the disciplines of research and practice, I produced and streamlined not only a new body of work, but also a fresh creative and pedagogical direction. Continuous academic research into the theories and texts of historic and contemporary writers and practitioners, including Lefbvre, Bachelard and Bourriaud in conjunction with the production of these films, informed the subsequent audio-visual narratives and progression. The prime elements of focused analysis are space, abstraction and rhythm which are then broken down into analytical subcategories. By employing a restricted technological means of production and postproduction, the cross-pollinated information generated with each film’s combination of sonic and optical components has led to new channels of discourse. With the application of archival found footage, I have continued to explore the reanimation of uninhabited space as well as the manipulation, reprojection and abstraction of the moving image, including new pathways in compositing imagery. Investigating the mathematical properties of rhythm has led to explorations into editing and the flow and tempo of audio-visual information, including the possibilities of remixing and regenerating existing material. This thesis is a springboard into a fresh, dynamic filmmaking practice. It maps new creative pathways open to the independent fine art filmmaker.
Spoil management and revegetation success on waste rock dumps at a southern interior B.C. copper mine
Creators: name: Gizikoff, Katherine Gould
Publisher: name: University of British Columbia
Year: 2010

description: The primary aim of this study was to investigate vegetation production and soil management factors influencing forage establishment on the waste rock dumps at a Southern Interior B.C. copper mine. Total plant cover on the waste rock dumps ranged from less than 5 to greater than 80 percent. Vegetation and spoil from the major reclaimed sites were analyzed to determine possible causes for the differences in plant cover. Test case areas, which varied in production, topography, and treatment, were then selected for an investigation into the relationships between spoil and vegetation variables. Waste rock and overburden glacial till materials were generally low in N, P, and Mg. Spoil N and K levels varied throughout each reclaimed site, likely as a result of fertilizer placement. Significant positive relationships were found between spoil N and grass cover and spoil K and both grass and legume cover. P levels in legumes from most fertilized sites were still in a deficiency range. A negative relationship between coarse fragment content and legume cover was observed. High coarse fragment content, accompanied with low water holding capacity and dry climatic conditions, suggests that moisture deficiencies are likely a critical problem for revegetation success, particularly on the lower portions of the slope faces. High bulk density values on the flat terraces indicated that compaction could be impeding root growth. Multivariate cluster analysis, based on total percent plant cover and percent composition legumes, was used to categorize all study sites into four vegetation production groups: low cover, grass cover, mixed grass and legume cover, and high production legume dominated cover. Spoil characteristics that differentiated between groups were: N, P, K, Mg, pH, coarse fragment content, and bulk density. This classification system will assist in identifying the management requirements of each vegetation type, such as: level and type of fertilization, overburden capping to reduce coarse fragment content, and scarification. Multiple regression analysis was used to generate equations for predicting biomass production from spoil N, P, K, Mg, pH, and coarse fragment content. Reclamation costs were estimated and it was demonstrated that grass cover and mixed grass and legume cover types were the most desirable. Although costs per hectare were lowest for the low cover type, efficiency of reclamation dollars (dollars invested per tonne forage produced) was also lowest for this type. Establishment of a legume dominated cover type may not be desirable due to forage quality considerations: Cu:Mo ratios in legume foliage averaged less than the recommended 2:1 for cattle grazing.
Interference and Shadow Effects in the Production of Light by Charged Particles in Optical Fibers
Creators: name: Artru, X.
name: Ray, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A charged particle passing through or near a narrow optical fiber induces, by polarisation, coherent light guided by the fiber. In the limit of zero crossing angle, the radiation tends towards a Cherenkov radiation with a discrete spectrum, studied by different authors. If the particle crosses a bent fiber at regularly spaced points, interference gives quasi-monochromatic lines. If the particle passes near an end of the fiber, light is produced by the capture of virtual photons through the end face. An alternative way consists in sticking a metallic ball to the fiber: the passing particle induces plasmons which are then evacuated as light in the fiber. Interferences can occur between lights from several ends or balls. Applications of these various light signals to beam diagnostics are discussed. The shadow effect, which reduces the photon yield when the particle runs parallel to a row of balls, is pointed out and an upper bound $-dE/dz\le C(Ze/b)^2$ for the particle energy loss is conjectured ($Ze$ is the particle charge, $b$ the impact parameter and $C$ a numerical constant). This bound should also apply to other kinds of light sources, in particular to Smith-Purcell radiation.
description: Presented at the VII Symposium Radiation by Relativistic Electrons in Periodic Structures (RREPS'O7, Prague, Sept. 24-27, 2007, submitted to Nucl. Inst. Methods B
Chemical abundances in LMC stellar populations I. The Inner disk sample Based on observations collected at the VLT UT2 telescope
Creators: name: Pompeia, L.
name: Hill, V.
name: Spite, M.
name: Cole, A.
name: Primas, F.
name: Romaniello, M.
name: Pasquini, L.
name: Cioni, M. -R.
name: Smecker-Hane, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The advent of the new class 8 meters telescopes allows for the first time the detailed study of numerous stars of galaxies other than our own. The Large Magellanic Cloud is one of the most interesting targets due to its proximity and its relatively face-on disk, permitting to separate populations pertaining to the different structures of the galaxy. We have used FLAMES (the Fibre Large Array Multi Element Spectrograph) at the VLT-UT2 telescope to obtain spectra of a large sample of stars from the Inner Disk of the LMC, $\sim$2 kpc from the center of the galaxy. We investigate the chemical abundances of iron-peak elements, heavy and light $s$-process elements, Cu, Na, Sc and $α$-elements for a sample of red giant stars. Metallicities for the sample stars range from [Fe/H] = $-$1.76 to $-$0.02. LMC inner disk stars show a definitely different chemical pattern when compared to galactic stars of the same metallicity.
description: 54 pages, 21 figures
Quantitative Tube Model for Semiflexible Polymer Solutions
Creators: name: Hinsch, Hauke
name: Wilhem, Jan
name: Frey, Erwin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We develop a analytical and quantitative theory of the tube model concept for entangled networks of semiflexible polymers. The absolute value of the tube diameter L_perp is derived as a function of the polymers' persistence length l_p and mesh size xi of the network. To leading order we find L_\perp = 0.32 xi^{6/5} l_p^{-1/5}, which is consistent with known asymptotic scaling laws. Additionally, our theory provides corrections to scaling that account for finite polymer length effects and are dominated by the mesh size to polymer length ratio. We support our analytical studies by extensive computer simulations. These allow to verify assumptions essential to our theoretical description and provide an excellent agreement with the analytically calculated tube diameter. Furthermore, we present simulation data for the distribution function of tube widths in the network.
description: 13 pages, 10 figures
Non-Abelian Anyon Superconductivity
Creators: name: Bishara, Waheb
name: Nayak, Chetan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Non-Abelian Anyons exist in certain spin models and may exist in Quantuam Hall systems at certain filling fractions. In this work we studied the ground state of dynamical SU(2) level-$κ$ Chern Simons non-Abelian anyons at finite density and no external magnetic field. We find that in the large-$κ$ limit the topological interaction induces a pairing instability and the ground state is a superconductor with $\it{d+id}$ gap symmetry. We also develop a picture of pairing for the special value $κ=2$ and argue that the ground state is a superfluid of pairs for all values of $κ$.
description: 5 pages, no figures
Four-point functions and kaon decays in a minimal AdS/QCD model
Creators: name: Hambye, Thomas
name: Hassanain, Babiker
name: March-Russell, John
name: Schvellinger, Martin
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the predictions of holographic QCD for various observable four-point quark flavour current-current correlators. The dual 5-dimensional bulk theory we consider is a $SU(3)_L \times SU(3)_R$ Yang Mills theory in a slice of $AdS_5$ spacetime with boundaries. Particular UV and IR boundary conditions encode the spontaneous breaking of the dual 4D global chiral symmetry down to the $SU(3)_V$ subgroup. We explain in detail how to calculate the 4D four-point quark flavour current-current correlators using the 5D holographic theory, including interactions. We use these results to investigate predictions of holographic QCD for the $ΔI = 1/2$ rule for kaon decays and the $B_K$ parameter. The results agree well in comparison with experimental data, with an accuracy of 25% or better. The holographic theory automatically includes the contributions of the meson resonances to the four-point correlators. The correlators agree well in the low-momentum and high-momentum limit, in comparison with chiral perturbation theory and perturbative QCD results, respectively.
description: Published version, title changed to conform with Journal format, references and clarifying remarks added, 40 pages, 5 figures
High energy gravitational scattering: a numerical study
Creators: name: Marchesini, Giuseppe
name: Onofri, Enrico
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The S-matrix in gravitational high energy scattering is computed from the region of large impact parameters b down to the regime where classical gravitational collapse is expected to occur. By solving the equation of an effective action introduced by Amati, Ciafaloni and Veneziano we find that the perturbative expansion around the leading eikonal result diverges at a critical value signalling the onset of a new regime. We then discuss the main features of our explicitly unitary S-matrix down to the Schwarzschild's radius R=2G s^(1/2), where it diverges at a critical value b ~ 2.22 R of the impact parameter. The nature of the singularity is studied with particular attention to the scaling behaviour of various observables at the transition. The numerical approach is validated by reproducing the known exact solution in the axially symmetric case to high accuracy.
description: 11 pages, 6 figures
Chemical Abundances in the Secondary Star of the Black Hole Binary V4641 Sagittarii (SAX J1819.3-2525)
Creators: name: Sadakane, Kozo
name: Arai, Akira
name: Aoki, Wako
name: Arimoto, Nobuo
name: Takada-Hidai, Masahide
name: Ohnishi, Takashi
name: Tajitsu, Akito
name: Beers, Timothy C.
name: Iwamoto, Nobuyuki
name: Tominaga, Nozomu
name: Umeda, Hideyuki
name: Maeda, Keiichi
name: Nomoto, Ken'ichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on detailed spectroscopic studies performed for the secondary star in the black hole binary (micro-quasar) V4641 Sgr in order to examine its surface chemical composition and to see if its surface shows any signature of pollution by ejecta from a supernova explosion. High-resolution spectra of V4641 Sgr observed in the quiescent state in the blue-visual region are compared with those of the two bright well-studied B9 stars (14 Cyg and $ν$ Cap) observed with the same instrument. The effective temperature of V4641 Sgr (10500 $\pm$ 200 K) is estimated from the strengths of He~{\sc i} lines, while its rotational velocity, $\it v$ sin $\it i$ (95 $\pm$ 10 km s${}^{-1}$), is estimated from the profile of the Mg~{\sc ii} line at 4481 Å. We obtain abundances of 10 elements and find definite over-abundances of N (by 0.8 dex or more) and Na (by 0.8 dex) in V4641 Sgr. From line-by-line comparisons of eight other elements (C, O, Mg, Al, Si, Ti, Cr, and Fe) between V4641 Sgr and the two reference stars, we conclude that there is no apparent difference in the abundances of these elements between V4641 Sgr and the two normal late B-type stars, which have been reported to have solar abundances. An evolutionary model of a massive close binary system has been constructed to explain the abundances observed in V4641 Sgr. The model suggests that the progenitor of the black hole forming supernova was as massive as ~ 35 Msun on the main-sequence and, after becoming a ~ 10 Msun He star, underwent "dark" explosion which ejected only N and Na-rich outer layer of the He star without radioactive $^{56}$Ni.
description: 13 pages, 14 figures. Accepted for publication in the PASJ: Publications of the Astronomical Society of Japan
Theoretical Properties of Projection Based Multilayer Perceptrons with Functional Inputs
Creators: name: Rossi, Fabrice
name: Conan-Guez, Brieuc
Publisher: name: arXiv
Year: 2006
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Many real world data are sampled functions. As shown by Functional Data Analysis (FDA) methods, spectra, time series, images, gesture recognition data, etc. can be processed more efficiently if their functional nature is taken into account during the data analysis process. This is done by extending standard data analysis methods so that they can apply to functional inputs. A general way to achieve this goal is to compute projections of the functional data onto a finite dimensional sub-space of the functional space. The coordinates of the data on a basis of this sub-space provide standard vector representations of the functions. The obtained vectors can be processed by any standard method. In our previous work, this general approach has been used to define projection based Multilayer Perceptrons (MLPs) with functional inputs. We study in this paper important theoretical properties of the proposed model. We show in particular that MLPs with functional inputs are universal approximators: they can approximate to arbitrary accuracy any continuous mapping from a compact sub-space of a functional space to R. Moreover, we provide a consistency result that shows that any mapping from a functional space to R can be learned thanks to examples by a projection based MLP: the generalization mean square error of the MLP decreases to the smallest possible mean square error on the data when the number of examples goes to infinity.
Written in stone : a comparative analysis of Sedna and the Moon Spirit as depicted in contemporary Inuit sculpture and graphics
Creators: name: Prokop, Carol Ann
Publisher: name: University of British Columbia
Year: 2010

description: Traditional mythological themes have been repeatedly depicted in contemporary Inuit art since the late 1950s. This thesis examines the portrayals of the female sea spirit or Sedna and the male moon spirit in sculpture and graphics by contemporary Inuit artists from three Arctic art "communities": Baker Lake, Cape Dorset and Povungnituk. Analysis of the mythological depictions has led me to conclude that artists have tended to employ two distinct styles of illustration to represent these deities. These two types are iconic and narrative. Introduced by the first generation of contemporary Inuit artists working in the late 1950s these types functioned as tangible expressions of the unique nature and role of each deity in Inuit culture as these were perceived by the Inuit artists, and involved a complicated process of integrating both traditional and "alien" elements. Subsequent generations of artists have retained these prototypes and continued to incorporate elements based on these two influences. The complex evolution of Sedna and Moon Spirit imagery reflects the role contemporary Inuit mythological art has come to play as both a medium of communication to non-Inuit and a historical and cultural repository for the Inuit.
The inertial dynamics of thin film flow of non-Newtonian fluids
Creators: name: Roberts, A. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Consider the flow of a thin layer of non-Newtonian fluid over a solid surface. I model the case of a viscosity that depends nonlinearly on the shear-rate; power law fluids are an important example, but the analysis here is for general nonlinear dependence. The modelling allows for large changes in film thickness provided the changes occur over a large enough lateral length scale. Modifying the surface boundary condition for tangential stress forms an accessible base for the analysis where flow with constant shear is a neutral critical mode, in addition to a mode representing conservation of fluid. Perturbatively removing the modification then constructs a model for the coupled dynamics of the fluid depth and the lateral momentum. For example, the results model the dynamics of gravity currents of non-Newtonian fluids even when the flow is not very slow.
Good rough path sequences and applications to anticipating stochastic calculus
Creators: name: Coutin, Laure
name: Friz, Peter
name: Victoir, Nicolas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H99 (Primary)

description: We consider anticipative Stratonovich stochastic differential equations driven by some stochastic process lifted to a rough path. Neither adaptedness of initial point and vector fields nor commuting conditions between vector field is assumed. Under a simple condition on the stochastic process, we show that the unique solution of the above SDE understood in the rough path sense is actually a Stratonovich solution. We then show that this condition is satisfied by the Brownian motion. As application, we obtain rather flexible results such as support theorems, large deviation principles and Wong--Zakai approximations for SDEs driven by Brownian motion along anticipating vectorfields. In particular, this unifies many results on anticipative SDEs.
description: Published at http://dx.doi.org/10.1214/009117906000000827 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Mid-infrared Properties and Color Selection for X-ray Detected AGN in the MUSYC ECDF-S field
Creators: name: Cardamone, Carolin N.
name: Urry, C. Megan
name: Damen, Maaike
name: van Dokkum, Pieter
name: Treister, Ezequiel
name: Labbé, Ivo
name: Virani, Shanil N.
name: Lira, Paulina
name: Gawiser, Eric
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the mid-infrared colors of X-ray-detected AGN and explore mid-infrared selection criteria. Using a statistical matching technique, the likelihood ratio, over 900 IRAC counterparts were identified with a new MUSYC X-ray source catalog that includes ~1000 published X-ray sources in the Chandra Deep Field-South and Extended Chandra Deep Field-South. Most X-ray-selected AGN have IRAC spectral shapes consistent with power-law slopes, f_{nu} ~ nu^{alpha}, and display a wide range of colors, -2 < alpha < 2. Although X-ray sources typically fit to redder (more negative alpha) power-laws than non-X-ray detected galaxies, more than 50% do have flat or blue (galaxy-like) spectral shapes in the observed 3-8 micron band. Only a quarter of the X-ray selected AGN detected at 24 micron are well fit by featureless red power laws in the observed 3.6-24 micron, likely the subset of our sample whose infrared spectra are dominated by emission from the central AGN region. Most IRAC color-selection criteria fail to identify the majority of X-ray-selected AGN, finding only the more luminous AGN, the majority of which have broad emission lines. In deep surveys, these color-selection criteria select 10-20% of the entire galaxy population and miss many moderate luminosity AGN.
description: 29 pages, including 7 figures. Accepted for publication in the Astrophysical Journal
Statement on Stewardship and Dissemination of Knowledge Generated Collaboratively in CANHelp Working Group Community Projects
Creators: name: Goodman, Karen J; Geary, Janis; Walker, Emily; Fagan-Garcia, Katharine; Archie, Billy; Munday, Rachel; McAlpine, Laura; Colquhoun, Amy; Chang, Hsiu-Ju; Assi, Ali; CANHelp Working Group
Publisher: name: University of Alberta Libraries
Year: 2016

Abstract
On Dissipation inside Turbulent Convection Zones from 3D Simulations of Solar Convection
Creators: name: Penev, Kaloyan
name: Sasselov, Dimitar
name: Robinson, Frank
name: Demarque, Pierre
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The development of 2D and 3D simulations of solar convection has lead to a picture of convection quite unlike the usually assumed Kolmogorov spectrum turbulent flow. We investigate the impact of this changed structure on the dissipation properties of the convection zone, parametrized by an effective viscosity coefficient. We use an expansion treatment developed by Goodman & Oh 1997, applied to a numerical model of solar convection (Robinson et al. 2003) to calculate an effective viscosity as a function of frequency and compare this to currently existing prescriptions based on the assumption of Kolmogorov turbulence (Zahn 1966, Goldreich & Keeley 1977). The results match quite closely a linear scaling with period, even though this same formalism applied to a Kolmogorov spectrum of eddies gives a scaling with power-law index of 5/3.
description: 13 pages, 4 figures
Theory of fast optical spin rotation in a quantum dot based on geometric phases and trapped states
Creators: name: Economou, Sophia E.
name: Reinecke, T. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A method is proposed for the optical rotation of the spin of an electron in a quantum dot using excited trion states to implement operations up to two orders of magnitude faster than those of most existing proposals. Key ingredients are the geometric phase induced by 2$π$ hyperbolic secant pulses, use of coherently trapped states and use of naturally dark states. Our proposal covers a wide variety of quantum dots by addressing different parameter regimes. In one case the treatment provides an exact solution to the three-level system. Numerical simulations with typical parameters for InAs self-assembled quantum dots, including their dissipative dynamics, give fidelities of the operations in excess of 99%.
Thraxions: Towards Full String Models
Creators: name: Carta, Federico
name: Mininno, Alessandro
name: Righi, Nicole
name: Westphal, Alexander
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2021
Subjects: orientifold: Calabi-Yau
moduli: Kaehler
conifold
axion
moduli: stability
throat
string model: Type IIB
Klebanov-Strassler model
torsion

description: We elucidate various aspects of the physics of thraxions, ultra-light axions arising at Klebanov-Strassler multi-throats in the compactification space of IIB superstring theory. We study the combined stabilization of Kahler moduli and thraxions, showing that under reasonable assumptions, one can solve the combined problem both in a KKLT and a LVS setup. We find that for non-minimal multi-throats, the thraxion mass squared is three-times suppressed by the throat warp factor. However, the minimal case of a double-throat can preserve the six-times suppression as originally found. We also discuss the backreaction of a non-vanishing thraxion vacuum expectation value on the geometry, showing that it induces a breaking of the imaginary self-duality condition for 3-form fluxes. This in turn breaks the Calabi-Yau structure to a complex manifold one. Finally, we extensively search for global models which can accommodate the presence of multiple thraxions within the database of Complete Intersection Calabi-Yau orientifolds. We find that each multi-throat system holds a single thraxion. We further point out difficulties in constructing a full-fledged global model, due to the generic presence of frozen-conifold singularities in a Calabi-Yau orientifold.
Measurement of CP-Violating Asymmetries in B0-->(rhopi)0 Using a Time-Dependent Dalitz Plot Analysis
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a measurement of CP-violating asymmetries in B0-->(rhopi)0-->pi+pi-pi0 decays using a time-dependent Dalitz plot analysis. The results are obtained from a data sample of 375 million Y(4S) --> BBbar decays, collected by the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure 26 coefficients of the bilinear form-factor terms occurring in the time-dependent decay rate of the B0 meson. We derive the physically relevant quantities from these coefficients. In particular, we measure a constraint on the angle alpha of the Unitarity Triangle.
description: 23 pages, 14 postscript figues, submitted to PRD
Vertices of Mather's Beta function, II
Creators: name: Massart, Daniel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37J50

description: If the $β$-function of a time-periodic Lagrangian on a manifold $M$ has a vertex at a $k$-irrational homology class $h$, then $2k \leq \dim M$. Furthermore if $\dim M =2$ $h$ is rational.
Dielectric constants of Ir, Ru, Pt, and IrO2: Contributions from bound charges
Creators: name: Choi, W. S.
name: Seo, S. S. A.
name: Kim, K. W.
name: Noh, T. W.
name: Kim, M. Y.
name: Shin, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigated the dielectric functions $ε$($ω$) of Ir, Ru, Pt, and IrO$_2$, which are commonly used as electrodes in ferroelectric thin film applications. In particular, we investigated the contributions from bound charges $ε^{b}$($ω$), since these are important scientifically as well as technologically: the $ε_1^{b}$(0) of a metal electrode is one of the major factors determining the depolarization field inside a ferroelectric capacitor. To obtain $ε_1^{b}$(0), we measured reflectivity spectra of sputtered Pt, Ir, Ru, and IrO2 films in a wide photon energy range between 3.7 meV and 20 eV. We used a Kramers-Kronig transformation to obtain real and imaginary dielectric functions, and then used Drude-Lorentz oscillator fittings to extract $ε_1^{b}$(0) values. Ir, Ru, Pt, and IrO$_2$ produced experimental $ε_1^{b}$(0) values of 48$\pm$10, 82$\pm$10, 58$\pm$10, and 29$\pm$5, respectively, which are in good agreement with values obtained using first-principles calculations. These values are much higher than those for noble metals such as Cu, Ag, and Au because transition metals and IrO$_2$ have such strong d-d transitions below 2.0 eV. High $ε_1^{b}$(0) values will reduce the depolarization field in ferroelectric capacitors, making these materials good candidates for use as electrodes in ferroelectric applications.
description: 26 pages, 6 figures, 2 tables
Heat-to-Fuel Newsletter Third Issue
Creators: name: Loureiro, Tatiana
Publisher: name: Zenodo
Year: 2020

description: Heat-to-Fuel has started its fourth and final year of planned R&I activities. In this issue of the newsletter you can get an overview of some of the advances of the project, and you can find interviews with several partners of the Consortium: IREC, POLITO, RE-CORD, TU Wien.
Zero differential resistance state of two dimensional electron systems in strong magnetic fields
Creators: name: Bykov, A. A.
name: Zhang, Jing-qiao
name: Vitkalov, Sergey
name: Kalagin, A. K.
name: Bakarov, A. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Zero differential resistance state is found in response to direct current applied to 2D electron systems at strong magnetic field and low temperatures. Transition to the state is accompanied by sharp dip of negative differential resistance, which occurs above threshold value $I_{th}$ of the direct current. The state depends significantly on the temperature and is not observable above several Kelvins. Additional analysis shows lack of the linear stability of the 2D electron systems at $I>I_{th}$ and inhomogeneous, non-stationary pattern of the electric current in the zero differential resistance state. We suggest that the dc bias induced redistribution of the 2D electrons in energy space is the dominant mechanism leading to the new electron state.
description: 5 pages, 3 figures
Comparison of the LUNA 3He(alpha,gamma)7Be activation results with earlier measurements and model calculations
Creators: name: Gyurky, Gy.
name: Bemmerer, D.
name: Confortola, F.
name: Costantini, H.
name: Formicola, A.
name: Bonetti, R.
name: Broggini, C.
name: Corvisiero, P.
name: Elekes, Z.
name: Fulop, Zs.
name: Gervino, G.
name: Guglielmetti, A.
name: Gustavino, C.
name: Imbriani, G.
name: Junker, M.
name: Laubenstein, M.
name: Lemut, A.
name: Limata, B.
name: Lozza, V.
name: Marta, M.
name: Menegazzo, R.
name: Prati, P.
name: Roca, V.
name: Rolfs, C.
name: Alvarez, C. Rossi
name: Somorjai, E.
name: Straniero, O.
name: Strieder, F.
name: Terrasi, F.
name: Trautvetter, H. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recently, the LUNA collaboration has carried out a high precision measurement on the 3He(alpha,gamma)7Be reaction cross section with both activation and on-line gamma-detection methods at unprecedented low energies. In this paper the results obtained with the activation method are summarized. The results are compared with previous activation experiments and the zero energy extrapolated astrophysical S factor is determined using different theoretical models.
description: Accepted for publication in Journal of Physics G
Heat-to-Fuel Newsletter Fourth Issue
Creators: name: Pérez, Laura
Publisher: name: Zenodo
Year: 2021

description: Heat-to-Fuel is reaching its final stage. In order to overcome the difficulties and delays caused by the COVID-19 pandemic crisis, the project duration has been extended until April 2022. In this issue of the newsletter you can get an overview of some of the project’s activities and accomplishments during this time, as well as getting to know the contributions of three partners of the Consortium: Bioenergy and Sustainable Technologies (BEST), Skupina Fabrika (SF) and R2M Solution Spain (R2M).
The constrained next-to-minimal supersymmetric standard model
Creators: name: Djouadi, A.
name: Ellwanger, U.
name: Teixeira, A. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the fully constrained version of the next-to-minimal supersymmetric extension of the standard model (cNMSSM) in which a singlet Higgs superfield is added to the two doublets that are present in the minimal extension (MSSM). Assuming universal boundary conditions at a high scale for the soft supersymmetry-breaking gaugino, sfermion and Higgs mass parameters as well as for the trilinear interactions, we find that the model is more constrained than the celebrated minimal supergravity model. The phenomenologically viable region in the parameter space of the cNMSSM corresponds to a small value for the universal scalar mass m_0: in this case, one single input parameter is sufficient to describe the phenomenology of the model once the available constraints from collider data and cosmology are imposed. We present the particle spectrum of this very predictive model and discuss how it can be distinguished from the MSSM.
description: 9 pages, 4 figures
Two types of Hc2(T) dependences in Bi_2Sr_2Ca_(1-x)Y_xCu_2O_(8+delta) with different Yttrium content
Creators: name: Landau, I. L.
name: Keller, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We reanalyze the magnetization data collected on Bi_2Sr_2Ca_(1-x)Y_xCu_2O_(8+y) samples (Kim at al, Phys. Rev. B 72, 64525 (2005)) and argue that the method, which was used for the analysis of equilibrium magnetization data, is not adequate to the experimental situation. As a result, the temperature dependencies of the upper critical field Hc2(T) and the magnetic field penetration depth lambda (T), obtained in this work, are misinterpreted. Using a different approach to analysis, we demonstrate that the normalizedHc2(T) curves are rather different from those presented in the original publication and do not follow predictions of the Werthamer-Helfand-Hohenberg theory. Another important observation is that the Hc2(T) dependencies for two samples with different levels of doping are qualitatively different.
description: 10 pages, 3 figures
Knight shift detection using gate-induced decoupling of the hyperfine interaction in quantum Hall edge channels
Creators: name: Masubuchi, S.
name: Hamaya, K.
name: Machida, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A method for the observation of the Knight shift in nanometer-scale region in semiconductors is developed using resistively detected nuclear magnetic resonance (RDNMR) technique in quantum Hall edge channels. Using a gate-induced decoupling of the hyperfine interaction between electron and nuclear spins, we obtain the RDNMR spectra with or without the electron-nuclear spin coupling. By a comparison of these two spectra, the values of the Knight shift can be given for the nuclear spins polarized dynamically in the region between the relevant edge channels in a single two-dimensional electron system, indicating that this method has a very high sensitivity compared to a conventional NMR technique.
description: 4 pages, 4 figures, to appear in Applied Physics Letters
Groom / Consume / Repair
Creators: name: Withers, Susan
Publisher: name: University of East London
Year: 2021

description: Spanning printmaking, photography, video and sculpture Groom / Consume / Repair explores the construction of female identity through consumerism; the pursuit of perfection, acceptance or visibility through the acquisition of possessions. This report reviews the evolution of my creative practice since graduating from a Fine Art degree in Leeds, through postgraduate study in printmaking at Wimbledon School of Art and subsequent activities as a freelance artist and curator. The main focus of the report examines the key tensions or contradictions which emerged as central concerns during the five year practice-led research enquiry on the Professional Doctorate in Fine Art at the University of East London. Informed by a range of contemporary feminist art practice, there is particular focus on the work of Janine Antoni, Mika Rottenberg, Mona Hatoum, Sarah Lucas and Sylvie Fleury. The research examines the influence of class and the dangerous or transgressive qualities of that which is often considered frivolous: colour and fashion. Alongside analysis of the cultural associations conveyed by materials, tensions were revealed between the need to conform and the capacity to subvert the societal expectations of women’s appearance. The power of fetishism is considered, and the theories of both Sigmund Freud and Karl Marx have contributed to the emergence of central themes; the idea of woman as both consumer and the consumed, and the revealing of the repetitive, hidden qualities of labour on which consumerism relies. Alluding to the processes involved in the manufacture of products and the maintenance of display, the preservation of order over self and surroundings is also explored. The influence of minimalism is acknowledged, specifically the use of the grid to suggest order or control. Addressing the excesses of consumerism through references to minimalism and the use of found objects revels the connotations of what we value, and what or who, we discard. The evolution of a sculptural component to my practice as a visual artist led to the recognition that exhibiting is a form of research activity, as necessary to development as time spent in the studio. An approach which can embrace the speculative or unsettled as productive, and allow the unforeseen to become a catalyst for progress.