cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Models of self-financing hedging strategies in illiquid markets: symmetry reductions and exact solutions
Creators: name: Bordag, Ljudmila A.
name: Mikaelyan, Anna
Publisher: name: arXiv
Year: 2010
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business
subject: 35K55, 34A05, 22E60

description: We study the general model of self-financing trading strategies in illiquid markets introduced by Schoenbucher and Wilmott, 2000. A hedging strategy in the framework of this model satisfies a nonlinear partial differential equation (PDE) which contains some function g(alpha). This function is deep connected to an utility function. We describe the Lie symmetry algebra of this PDE and provide a complete set of reductions of the PDE to ordinary differential equations (ODEs). In addition we are able to describe all types of functions g(alpha) for which the PDE admits an extended Lie group. Two of three special type functions lead to models introduced before by different authors, one is new. We clarify the connection between these three special models and the general model for trading strategies in illiquid markets. We study with the Lie group analysis the new special case of the PDE describing the self-financing strategies. In both, the general model and the new special model, we provide the optimal systems of subalgebras and study the complete set of reductions of the PDEs to different ODEs. In all cases we are able to provide explicit solutions to the new special model. In one of the cases the solutions describe power derivative products.
description: 17 pages, 3 figures
Circuit cavity electromechanics in the strong coupling regime
Creators: name: Teufel, J. D.
name: Li, D.
name: Allman, M. S.
name: Cicak, K.
name: Sirois, A. J.
name: Whittaker, J. D.
name: Simmonds, R. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Demonstrating and exploiting the quantum nature of larger, more macroscopic mechanical objects would help us to directly investigate the limitations of quantum-based measurements and quantum information protocols, as well as test long standing questions about macroscopic quantum coherence. The field of cavity opto- and electro-mechanics, in which a mechanical oscillator is parametrically coupled to an electromagnetic resonance, provides a practical architecture for the manipulation and detection of motion at the quantum level. Reaching this quantum level requires strong coupling, interaction timescales between the two systems that are faster than the time it takes for energy to be dissipated. By incorporating a free-standing, flexible aluminum membrane into a lumped-element superconducting resonant cavity, we have increased the single photon coupling strength between radio-frequency mechanical motion and resonant microwave photons by more than two orders of magnitude beyond the current state-of-the-art. A parametric drive tone at the difference frequency between the two resonant systems dramatically increases the overall coupling strength. This has allowed us to completely enter the strong coupling regime. This is evidenced by a maximum normal mode splitting of nearly six bare cavity line-widths. Spectroscopic measurements of these 'dressed states' are in excellent quantitative agreement with recent theoretical predictions. The basic architecture presented here provides a feasible path to ground-state cooling and subsequent coherent control and measurement of the quantum states of mechanical motion.
description: 8 pages, 4 figures
Fractional quantum Hall effect in the absence of Landau levels
Creators: name: Sheng, D. N.
name: Gu, Zheng-Cheng
name: Sun, Kai
name: Sheng, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It has been well-known that topological phenomena with fractional excitations, i.e., the fractional quantum Hall effect (FQHE) \cite{Tsui1982} will emerge when electrons move in Landau levels. In this letter, we report the discovery of the FQHE in the absence of Landau levels in an interacting fermion model. The non-interacting part of our Hamiltonian is the recently proposed topologically nontrivial flat band model on the checkerboard lattice \cite{sun}. In the presence of nearest-neighboring repulsion ($U$), we find that at 1/3 filling, the Fermi-liquid state is unstable towards FQHE. At 1/5 filling, however, a next-nearest-neighboring repulsion is needed for the occurrence of the 1/5 FQHE when $U$ is not too strong. We demonstrate the characteristic features of these novel states and determine the phase diagram correspondingly.
description: 6 pages and 4 figures
A note on the geometrical interpretation of quantum groups and non-commutative spaces in gravity
Creators: name: Bianchi, Eugenio
name: Rovelli, Carlo
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum groups and non-commutative spaces have been repeatedly utilized in approaches to quantum gravity. They provide a mathematically elegant cut-off, often interpreted as related to the Planck-scale quantum uncertainty in position. We consider here a different geometrical interpretation of this cut-off, where the relevant non-commutative space is the space of directions around any spacetime point. The limitations in angular resolution expresses the finiteness of the angular size of a Planck-scale minimal surface at a maximum distance 1/\sqrt{Lambda} related the cosmological constant Lambda. This yields a simple geometrical interpretation for the relation between the quantum deformation parameter q=exp[i Lambda l_{Planck}^2 ] and the cosmological constant, and resolves a difficulty of more conventional interpretations of the physical geometry described by quantum groups or fuzzy spaces.
description: 2 pages, 1 figure
Mass and isospin dependence of symmetry energy coefficients of finite nuclei
Creators: name: Wang, Ning
name: Liu, Min
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Mass and isospin dependence of symmetry energy coefficients $a_{sym}$ of finite nuclei is investigated with the measured nuclear masses incorporating the liquid drop mass formula. The enhanced $a_{sym}$ for nearly symmetric nuclei are observed. To describe the mass and isospin dependence of $a_{sym}$, a modified formula based on the conventional surface-symmetry term is proposed and the corresponding rms deviation of nuclear masses is checked.
description: 3 figures, 1 table; to appear in Phys. Rev. C
Hydrodynamic description of transport in strongly correlated electron systems
Creators: name: Andreev, A. V.
name: Kivelson, Steven A.
name: Spivak, B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a hydrodynamic description of the resistivity and magnetoresistance of an electron liquid in a smooth disorder potential. This approach is valid when the electron-electron scattering length is sufficiently short. In a broad range of temperatures, the dissipation is dominated by heat fluxes in the electron fluid, and the resistivity is inversely proportional to the thermal conductivity, $κ$. This is in striking contrast with the Stokes flow, in which the resistance is independent of $κ$ and proportional to the fluid viscosity. We also identify a new hydrodynamic mechanism of spin magnetoresistance.
North Scottsdale Reconnaissance Survey, Scottsdale, Arizona
Creators: name: Recon / Regional Environmental Consultants
Publisher: name: Recon / Regional Environmental Consultants
Year: 1987
Subjects: subject: 56th Street
valueUri: https://core.tdar.org/browse/geographic-keyword/80564/56th-street
subject: 136th Street
valueUri: https://core.tdar.org/browse/geographic-keyword/80566/136th-street
subject: Jenny Lynn Road
valueUri: https://core.tdar.org/browse/geographic-keyword/80565/jenny-lynn-road
subject: Scottsdale
valueUri: https://core.tdar.org/browse/geographic-keyword/74471/scottsdale
subject: Deer Valley Road
valueUri: https://core.tdar.org/browse/geographic-keyword/80567/deer-valley-road
subject: Arizona (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/79515/arizona-state-territory
subject: Hohokam
valueUri: https://core.tdar.org/browse/culture-keyword/21/hohokam
subject: Archaic
valueUri: https://core.tdar.org/browse/culture-keyword/8/archaic
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Historic Background Research
valueUri: https://core.tdar.org/browse/investigation-type/18/historic-background-research
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey
subject: Research Design / Data Recovery Plan
valueUri: https://core.tdar.org/browse/investigation-type/9/research-design-data-recovery-plan

description: This report details the results of the North Scottsdale Reconnaissance Survey conducted by Regional Environmental Consultants (RECON). This survey and planning project was jointly funded by the U.S. Department of the Interior, National Park Service, and the City of Scottsdale and was administered through the Arizona State Historic Preservation Officer, Arizona State Parks Board, and the Department of Planning and Economic Development, City of Scottsdale. The purpose of the project was to document previous archaeological work and historical events connected specifi­cally with the project area, design and conduct an on-ground reconnaissance- level survey to identify cultural resources and evaluate their eligibility for inclusion in the National Register of Historic Places, and provide the City of Scottsdale with recommendations concerning the future management of cultural resources in north Scottsdale. The project was organized into three phases. The first phase involved the collection of documentary data and the development of a research design for the on-ground survey. This phase began on May 25, 1987, and was completed on June 15, 1987, with the submission of a draft research design to the Department of Planning and Economic Development, City of Scottsdale. The design was reviewed by the City of Scottsdale and the Arizona State Parks Board and permission to implement the on-ground survey was obtained on July 13, 1987. The on-ground survey represented the second phase of the project and was completed on August 14, 1987. The final phase of the project consisted of the writing and production of a report of findings.
A Deep Chandra ACIS Study of NGC 4151. I. the X-ray Morphology of the 3 kpc-diameter Circum-nuclear Region and Relation to the Cold Interstellar Medium
Creators: name: Wang, Junfeng
name: Fabbiano, Giuseppina
name: Risaliti, Guido
name: Elvis, Martin
name: Karovska, Margarita
name: Zezas, Andreas
name: Mundell, Carole G.
name: Dumas, Gaelle
name: Schinnerer, Eva
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the imaging analysis of 200 ks sub-arcsecond resolution Chandra ACIS-S observations of the nearby Seyfert 1 galaxy NGC 4151. Bright, structured soft X-ray emission is observed to extend from 30 pc to 1.3 kpc in the south-west from the nucleus, much farther than seen in earlier X-ray studies. The terminus of the north-eastern X-ray emission is spatially coincident with a CO gas lane, where the outflow likely encounters dense gas in the host galactic disk. X-ray emission is also detected outside the boundaries of the ionization cone, which indicates that the gas there is not completely shielded from the nuclear continuum, as would be the case for a molecular torus collimating the bicone. In the central r<200 pc region, the subpixel processing of the ACIS data recovers the morphological details on scales of <30~pc (<0.5") first discovered in Chandra HRC images. The X-ray emission is more absorbed towards the boundaries of the ionization cone, as well as perpendicular to the bicone along the direction of a putative torus in NGC 4151. The innermost region where X-ray emission shows the highest hardness ratio, is spatially coincident with the near-infrared resolved H_2 emission and dusty spirals we find in an HST V-H color image. The agreement between the observed H_2 line flux and the value predicted from X-ray-irradiated molecular cloud models supports photo-excitation by X-rays from the active nucleus as the origin of the H_2 line, although contribution from UV fluorescence or collisional excitation cannot be fully ruled out with current data. The discrepancy between the mass of cold molecular gas inferred from recent CO and near-infrared H_2 observations may be explained by the anomalous CO abundance in this X-ray dominated region. The total H_2 mass derived from the X-ray observation agrees with measurement in Storchi-Bergmann et al.
description: 33 pages, 9 figures and 2 tables
Optical turbulence simulations at Mt Graham using the Meso-NH mode
Creators: name: Hagelin, S.
name: Masciadri, E.
name: Lascaux, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The mesoscale model Meso-NH is used to simulate the optical turbulence at Mt Graham (Arizona, USA), site of the Large Binocular Telescope. Measurements of the CN2-profiles obtained with a generalized scidar from 41 nights are used to calibrate and quantify the model's ability to reconstruct the optical turbulence. The measurements are distributed over different periods of the year, permitting us to study the model's performance in different seasons. A statistical analysis of the simulations is performed for all the most important astroclimatic parameters: the CN2-profiles, the seeing ε, the isoplanatic angle θ0 and the wavefront coherence time τ0. The model shows a general good ability in reconstructing the morphology of the optical turbulence (the shape of the vertical distribution of CN2) as well as the strength of all the integrated astroclimatic parameters. The relative error (with respect to measurements) of the averaged seeing on the whole atmosphere for the whole sample of 41 nights is within 9.0 %. The median value of the relative error night by night is equal to 18.7 %, so that the model still maintains very good performances. Comparable percentages are observed in partial vertical slabs (free atmosphere and boundary layer) and in different seasons (summer and winter). We prove that the most urgent problem, at present, is to increase the ability of the model in reconstructing very weak and very strong turbulence conditions in the high atmosphere. This mainly affects the model's performances for the isoplanatic angle predictions, for which the median value of the relative error night by night is equal to 35.1 %. No major problems are observed for the other astroclimatic parameters. A variant to the standard calibration method is tested but we find that it does not provide better results, confirming the solid base of the standard method.
description: 12 pages, 12 figures. The definitive version can be found at: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2010.18097.x/abstract
Guide to Interpretation of Structural Features Associated with the Kentucky River Fault System Along U.S. Highway 27 Near Camp Nelson, Kentucky
Creators: name: Gilreath, J. A.
name: Potter, Paul E.
name: Losonsky, George
Publisher: name: Kentucky Geological Survey, University of Kentucky
Year: 1989

description: Abstract:
The spectacular, near- vertical roadcuts in the High Bridge Group (Middle Ordovician) in central Kentucky (Fig. 1) along U.S. Highway 27 just south of the Kentucky River (Fig. 2) afford an excellent opportunity to examine a major fault zone and study its complexity (Figs, 3, 4). These roadcuts are located in Garrard County approximately 12 miles south of Lexington and contain the oldest rocks exposed in Kentucky.
Funding information: The drafting assistance of Lyla Messick, University of Cincinnati, and the financial support of Schlumberger Well Services are greatly appreciated.
Promises of prosperity : mining-involved Inuit mothers and culturally relevant child welfare
Creators: name: Johnston, Patricia
Publisher: name: University of British Columbia
Year: 2018

description: Research indicates extractive resource development, such as mining, can have negative impacts on women. This includes increased domestic violence and substance abuse among other things. Social and personal problems generated by the separation of families through fly-in, fly-out (FIFO) employment, as well as increased incomes, and other changes can occur. These problems can often bring families to the attention child welfare (state intervention for the protection of children), yet no studies have been undertaken that connect matters of child welfare to the employment of women and other family members in the mining industry. Through interviews with mothers directly affected by either/both involvement with child welfare and/or mining employment, this study documents and alters an understanding of these experiences. Where mining provides employment to an increasing number of Inuit in Nunavut, understanding how mothers perceive social workers and believe social workers to have responded to these problems is important. This is because there is a growing awareness within the social work profession of the importance of providing culturally relevant child welfare services and supports. In Nunavut, this would involve services and supports that are created from within Inuit culture and Inuit Qaujimajatuqangit (IQ) or traditional knowledge. While respecting and incorporating Inuit cultural considerations, this study examines how mining can impact mothers’ responsibilities in relation to the care and protection of their children. It also examines what support services and programs need to be developed; and where changes to existing infrastructure are required that are informed by IQ. Without this information, decision makers in Nunavut are insufficiently tasked to develop solutions and inform standards, legislation, policies and programs to protect children in ways that respect and incorporate Inuit cultural considerations. This was a community-based participatory study; mothers were directly involved in the data collection and analysis. The study found mothers encountered a range of problems associated with mining employment among other things. There are a range of policy implications that stem from these findings, most importantly regarding the design of child welfare within the territory. The mothers have offered suggestions for what would help them to protect and care for their children.
Inferring and asserting distributed invariants
Creators: name: Grant, Stewart
Publisher: name: University of British Columbia
Year: 2018

description: Distributed systems are difficult to debug and understand. A key reason for this is distributed state, which is not easily accessible and must be pieced together from the states of the individual nodes in the system. We propose Dinv, an automatic approach to help developers of distributed sys- tems uncover the runtime distributed state properties of their systems. Dinv uses static and dynamic program analyses to infer relations between variables at differ- ent nodes. For example, in a leader election algorithm, Dinv can relate the variable leader at different nodes to derive the invariant ∀ nodes i, j, leader i = leader j . This can increase the developer’s confidence in the correctness of their system. The developer can also use Dinv to convert an inferred invariant into a distributed runtime assertion on distributed state. We applied Dinv to several popular distributed systems, such as etcd Raft, Hashicorp Serf, and Taipei-Torrent, which have between 1.7K and 144K LOC and are widely used. Dinv derived useful invariants for these systems, including invari- ants that capture the correctness of distributed routing strategies, leadership, and key hash distribution. We also used Dinv to assert correctness of the inferred etcd Raft invariants at runtime, using these asserts to detect injected silent bugs.
Compressive auto-indexing in femtosecond nanocrystallography
Creators: name: Maia, F. R. N. C.
name: Yang, C.
name: Marchesini, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Ultrafast nanocrystallography has the potential to revolutionize biology by enabling structural elucidation of proteins for which it is possible to grow crystals with 10 or fewer unit cells on the side. The success of nanocrystallography depends on robust orientation-determination procedures that allow us to average diffraction data from multiple nanocrystals to produce a three dimensional (3D) diffraction data volume with a high signal-to-noise ratio. Such a 3D diffraction volume can then be phased using standard crystallographic techniques. "Indexing" algorithms used in crystallography enable orientation determination of diffraction data from a single crystal when a relatively large number of reflections are recorded. Here we show that it is possible to obtain the exact lattice geometry from a smaller number of measurements than standard approaches using a basis pursuit solver.
description: Spence Festschrift on Ultramicroscopy
Topological Magnetic Insulators with Corundum Structure
Creators: name: Wang, Jing
name: Li, Rundong
name: Zhang, Shou-Cheng
name: Qi, Xiao-Liang
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Topological insulators are new states of quantum matter in which surface states residing in the bulk insulating gap are protected by time-reversal symmetry. When a proper kind of antiferromagnetic long range order is established in a topological insulator, the system supports axionic excitations. In this paper, we study theoretically the electronic states in a transition metal oxide of corundum structure, in which both spin-orbit interaction and electron-electron interaction play crucial roles. A tight-binding model analysis predicts that materials with this structure can be strong topological insulator. Because of the electron correlation, an antiferromagnetic order may develop, giving rise to a topological magnetic insulator phase with axionic excitations.
description: 4.6 pages, 4 figures
Strength of Correlations in electron and hole doped cuprates
Creators: name: Weber, Cedric
name: Haule, Kristjan
name: Kotliar, Gabriel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: High temperature superconductivity was achieved by introducing holes in a parent compound consisting of copper oxide layers separated by spacer layers. It is possible to dope some of the parent compounds with electrons, and their physical properties are bearing some similarities but also significant differences from the hole doped counterparts. Here, we use a recently developed first principles method, to study the electron doped cuprates and elucidate the deep physical reasons why their behavior is so different than the hole doped materials. We find that electron doped compounds are Slater insulators, e.g. a material where the insulating behavior is the result of the presence of magnetic long range order. This is in sharp contrast with the hole doped materials, where the parent compound is a Mott charge transfer insulator, namely a material which is insulating due to the strong electronic correlations but not due to the magnetic order.
description: submitted to Nature Physics
Energy transfer process in gas models of Lennard-Jones interactions
Creators: name: Yang, Jinghua
name: Zhang, Yong
name: Wang, Jiao
name: Zhao, Hong
Publisher: name: arXiv
Year: 2011
Subjects: subject: Classical Physics (physics.class-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We perform simulations to investigate how the energy carried by a molecule transfers to others in an equilibrium gas model. For this purpose we consider a microcanonical ensemble of equilibrium gas systems, each of them contains a tagged molecule located at the same position initially. The ensuing transfer process of the energy initially carried by the tagged molecule is then exposed in terms of the ensemble-averaged energy density distribution. In both a 2D and a 3D gas model with Lennard-Jones interactions at room temperature, it is found that the energy carried by a molecule propagates in the gas ballistically, in clear contrast with the Gaussian diffusion widely assumed in previous studies. A possible scheme of experimental study of this issue is also proposed
description: 5 pages,3 figure
The nature of infants' early object word comprehension
Creators: name: Campbell, Jennifer Christa Shirley
Publisher: name: University of British Columbia
Year: 2018

description: A longstanding question in the literature on language development concerns the nature of infants’ first object word representations: Do these terms have scope over individual objects or entire object categories? Answering this question is important for accounts of the origin of lexical knowledge. Through seven experiments, this dissertation explored the nature of infants’ early object word comprehension. Experiments 1 to 4 assessed six-month-olds’ comprehension of the names for their caregivers. The findings support the claim that these words have scope over individual objects and are consistent with the possibility that infants can represent names for individual objects from the outset of word learning. Experiments 5 and 6 explored whether six- and nine-month-olds comprehend both labels with scope over individual objects (the name for their mother, e.g., "Mommy") and labels with scope over object categories (the word "hand" at six months; the word "ball" at nine months). The results were consistent with these predictions. These discoveries suggest that infants can represent both words for individual objects and words for object categories from the beginning of lexical development. Experiment 7 went a step further than the previous experiments by exploring whether 12- to 15-month-olds comprehend two object labels with differing scope for the same object (i.e., their own pet dog or cat): both a name for the individual object (e.g., "Fido") and a name for the object category (e.g., "dog"). The results indicate that by about their first birthday, infants have the cognitive flexibility to learn multiple words differing in extension (individual object, object category) for the same object. Together, the findings suggest that the capacity to learn both words with individual object scope and words with object category scope is present from the outset of lexical development. Additionally, the demonstration that by one year, infants can learn two words - one with individual scope and one with categorical scope – for the same object, indicates previously undocumented flexibility in their capacity to represent the same physical object both as an individual object and as an instance of an object category. The findings significantly enrich our understanding of the origins of lexical development.
Tartu Ülikooli muuseumi 2017. aasta aruanne
Creators: name: Raisma, Mariann
Publisher: name: Tartu Ülikooli ajaloo küsimusi
Year: 2018

description: Tartu Ülikooli ajaloo küsimusi, Vol 46 (2018): Reaal- ja loodusteadused rahvusülikoolis
In Memoriam. Tullio Ilometsa mälestuseks
Creators: name: Raisma, Mariann
Publisher: name: Tartu Ülikooli ajaloo küsimusi
Year: 2018

description: Tartu Ülikooli ajaloo küsimusi, Vol 46 (2018): Reaal- ja loodusteadused rahvusülikoolis
Entrevista: Aumento desapariciones en México
Creators: name: Pérez Caballero, Jesús
Publisher: name: Zenodo
Year: 2018
Subjects: México
desaparecidos
violencia
crimen organizado
desaparición forzada

description: Entrevista completa sobre el aumento de las desapariciones en México (37435, a abril de 2018), realizada por correo el 24 de junio de 2018. Publicada casi íntegramente en Zeta Tijuana, semana del 29 de junio al 5 de julio de 2018, n. 2309, pp. 18A-21A. Entrevistador: Luis Carlos Sáinz Martínez.
Distributed Detection over Gaussian Multiple Access Channels with Constant Modulus Signaling
Creators: name: Tepedelenlioglu, Cihan
name: Dasarathan, Sivaraman
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A distributed detection scheme where the sensors transmit with constant modulus signals over a Gaussian multiple access channel is considered. The deflection coefficient of the proposed scheme is shown to depend on the characteristic function of the sensing noise and the error exponent for the system is derived using large deviation theory. Optimization of the deflection coefficient and error exponent are considered with respect to a transmission phase parameter for a variety of sensing noise distributions including impulsive ones. The proposed scheme is also favorably compared with existing amplify-and-forward and detect-and-forward schemes. The effect of fading is shown to be detrimental to the detection performance through a reduction in the deflection coefficient depending on the fading statistics. Simulations corroborate that the deflection coefficient and error exponent can be effectively used to optimize the error probability for a wide variety of sensing noise distributions.
description: 30 pages, 12 figures
Mutually unbiased bases: tomography of spin states and star-product scheme
Creators: name: Filippov, S. N.
name: Man'ko, V. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Mutually unbiased bases (MUBs) are considered within the framework of a generic star-product scheme. We rederive that a full set of MUBs is adequate for a spin tomography, i.e. knowledge of all probabilities to find a system in each MUB-state is enough for a state reconstruction. Extending the ideas of the tomographic-probability representation and the star-product scheme to MUB-tomography, dequantizer and quantizer operators for MUB-symbols of spin states and operators are introduced, ordinary and dual star-product kernels are found. Since MUB-projectors are to obey specific rules of the star-product scheme, we reveal the Lie algebraic structure of MUB-projectors and derive new relations on triple- and four-products of MUB-projectors. Example of qubits is considered in detail. MUB-tomography by means of Stern-Gerlach apparatus is discussed.
description: 11 pages, 1 table, partially presented at the 17th Central European Workshop on Quantum Optics (CEWQO'2010), June 6-11, 2010, St. Andrews, Scotland, UK
Spectral variability of the peculiar A-type supergiant 3Pup
Creators: name: Chentsov, Eugenij
name: Klochkova, Valentina
name: Miroshnichenko, Anatoly
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Optical spectra of the peculiar supergiant 3Pup taken in 1997-2008 are used to analyze the spectral peculiarities and velocity field in its atmosphere. The profiles of strong FeII lines and of the lines of other iron-group ions have a specific shape: the wings are raised by emissions, whereas the core is sharpened by a depression. The latter feature becomes more pronounced with the increasing line strength, and the increasing wavelength. Line profiles are variable: the magnitude and sign of the absorption asymmetry, and the blue-to-red emission intensity ratios vary from one spectrum to another. The temporal Vr variations are minimal for the forbidden emissions and sharp shell cores of the absorption features of FeII(42), and other strong lines of iron-group ions. The average velocity for the above lines can be adopted as the systemic velocity: Vsys=28.5+/-0.5km/s. The weakest photospheric absorptions and photospheric MgII, SiII absorptions exhibit well-defined day-to-day velocity variations of up to 7km/s. Quantitative spectral classification yields the spectral type of A2.7+/-0.3 Ib. The equivalent widths and profiles of Hdelta and Hgamma, and the equivalent width of the OI7774A triplet yield an absolute magnitude estimate of Mv=-5.5+/-0.3mag, implying the heliocentric distance of 0.7kpc.
description: 30 pages, 9 figures, 3 tables
Prospects For Identifying Dark Matter With CoGeNT
Creators: name: Kelso, Chris
name: Hooper, Dan
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: It has previously been shown that the excess of events reported by the CoGeNT collaboration could be generated by elastically scattering dark matter particles with a mass of approximately 5-15 GeV. This mass range is very similar to that required to generate the annual modulation observed by DAMA/LIBRA and the gamma rays from the region surrounding the Galactic Center identified within the data of the Fermi Gamma Ray Space Telescope. To confidently conclude that CoGeNT's excess is the result of dark matter, however, further data will likely be needed. In this paper, we make projections for the first full year of CoGeNT data, and for its planned upgrade. Not only will this body of data more accurately constrain the spectrum of nuclear recoil events, and corresponding dark matter parameter space, but will also make it possible to identify seasonal variations in the rate. In particular, if the CoGeNT excess is the product of dark matter, then one year of CoGeNT data will likely reveal an annual modulation with a significance of 2-3$σ$. The planned CoGeNT upgrade will not only detect such an annual modulation with high significance, but will be capable of measuring the energy spectrum of the modulation amplitude. These measurements will be essential to irrefutably confirming a dark matter origin of these events.
description: 6 pages, 6 figures
Mapping the East - West divide in human sexuality
Creators: name: Chang, Sabrina Chia Hsuan
Publisher: name: University of British Columbia
Year: 2018

description: Culture anchors human behaviours, thoughts, and feelings. As with many psychological disciplines, sexuality research is beginning to recognize the influence of culture. The study of culture in sex research has predominantly taken the form of comparing ethnic groups. Such comparisons have revealed some interesting similarities and disparities between Asians and Westerners, with Asians appearing to be overall more conservative than their Western counterparts. While this field has accumulated some important information on how the East and West compare with respect to sexuality, it is not without considerable shortcomings. This dissertation addresses three such limitations. In Study 1, the common practice of merging individuals from different Asian ethnicities into one participant group was evaluated by comparing Japanese-, Korean- and Chinese-Canadian women on their sexual functioning. The results challenge the assumption of Asian sexual homogeneity by demonstrating that Japanese-, Chinese- and Korean-Canadian women differ with respect to sexual functioning. Study 2 was designed to ameliorate the overreliance on self-report measures in cross-cultural research by measuring sexual attitudes using the Implicit Association Test in addition to subjective measures. Both methods found the well documented trend of Chinese individuals endorsing more negative sexual attitudes, lending confidence that this is a genuine ethnocultural difference, rather than a product of response bias. Integrating the fields of sex research and relationship science, Study 3 is the first to examine the derogation effect in a non-Western culture and whether this relationship maintenance mechanism is influenced by sexual arousal. Surprisingly, the derogation effect was not replicated in Chinese men, Chinese women, or European women. Contrary to previous reports, European men were found to exhibit a reverse derogation effect, where those in relationships were more likely to find opposite-sex individuals attractive, compared to their single counterparts. Moreover, sexual arousal was observed to increase the attractiveness of opposite-sex others to single individuals, but not those in relationships, revealing a relationship maintenance mechanism that has not previously been identified. This series of studies has important clinical and research implications, not only for furthering our understanding of Asian sexuality, but also for improving the practice of examining the role of culture in sexuality.
Geologic Highway Cross Sections: Interstate Highway 75 Conway, Kentucky, to Jellico, Tennessee
Creators: name: Chesnut, Donald R.
Publisher: name: Kentucky Geological Survey, University of Kentucky
Year: 1992

description: Abstract:
Highway roadcuts along Interstate Highway 75 from Conway, Kentucky, to Jellico, Tennessee, expose Mississippian and Pennsylvanian rocks in south-central Kentucky (Fig. 1). The roadcut exposures offer easy access and stratigraphic variety for educational purposes, and are ideal for high school, university, and professional geology field trips. Several national and international field trips, and many out-of-State university field trips have examined these exposures. In addition, scientific studies involving elastic and carbonate sedimentology, coal geology, paleontology, biostratigraphy, and karst (cave) development have been undertaken along this road.
Role of dislocations in scattering of charge carriers in mechanical polishing damaged layers of silicon wafers
Creators: name: Yuryev, Vladimir
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Physical processes resulting in the anomalous (cubic) dependence of the small-angle IR scattering intensity from near-surface layers of mechanically polished silicon and germanium wafers on the photoexcitation power were revealed. It was shown that extended linear defects and dislocations in the damaged region contribute predominantly to carrier scattering.
description: A brief note
Adiabatic Mass Loss in Binary Stars - I. Computational Method
Creators: name: Ge, Hongwei
name: Hjellming, Michael S.
name: Webbink, Ronald F.
name: Chen, Xuefei
name: Han, Zhanwen
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The asymptotic response of donor stars in interacting binary systems to very rapid mass loss is characterized by adiabatic expansion throughout their interiors. In this limit, energy generation and heat flow through the stellar interior can be neglected. We model this response by constructing model sequences, beginning with a donor star filling its Roche lobe at an arbitrary point in its evolution, holding its specific entropy and composition profiles fixed as mass is removed from the surface. The stellar interior remains in hydrostatic equilibrium. Luminosity profiles in these adiabatic models of mass-losing stars can be reconstructed from the specific entropy profiles and their gradients. These approximations are validated by comparison with time-dependent binary mass transfer calculations. We describe how adiabatic mass loss sequences can be used to quantify threshold conditions for dynamical time scale mass transfer, and to establish the range of post-common envelope binaries that are allowed energetically.
description: 41 pages, 7 figures, Accepted for publication in ApJ, Abstract abridged
A Philosophical Hermeneutic Study of the Interview between Minister Louis Farrakhan and Imam W. Deen Mohammed: Toward a Fusion of Horizons
Creators: name: Muhammad, E. Anthony
Publisher: name: University of Calgary
Year: 2018
Subjects: Hans-Georg Gadamer; philosophical hermeneutics; fusion of horizons; interfaith dialogue; Nation of Islam

description: The philosophical hermeneutics of Hans-Georg Gadamer has broadened the scope and manner of hermeneutic inquiry. By focusing on aspects of Gadamer’s hermeneutics such as dialogue, the hermeneutic circle, play, openness, and the fusion of horizons, this study sought to apply Gadamer’s ideas to an historic interview that took place between two notable Islamic leaders, Minister Louis Farrakhan and Imam Warith Deen Mohammed. By analyzing the dialogue of the interview and identifying the relevant Gadamerian concepts at play within the exchanges, it was determined that a fusion of horizons did in fact occur. By applying philosophical hermeneutics to a real world dialogic encounter with participants who harbored deep-seated, divergent views, the current study accentuates the use of philosophical hermeneutics as an analytic framework. This study also highlights the utility of using philosophical hermeneutics in inter and intra-faith dialogue specifically, and in the quest for understanding in general.
description: Journal of Applied Hermeneutics, 2018
My Life Flashed Before My Eyes
Creators: name: Humphries, Joan Margaret
Publisher: name: University of Calgary
Year: 2018
Subjects: Time; Hermeneutics; Nursing; Philosophy; Human Science; Metaphysics

description: The everyday experience of time can be disrupted by the events in our lives, and disquiet notions of predictability about the passage of time. In this work, I describe an alternate experience of time passing that occurred in the context of a car accident. The phrase "I saw my life flash before my eyes" situates the varietal experience of time in human existence, and invites the use of chosen hermeneutic tenets to explore the phenomena. I describe the mysterious personal experience of time associated with the accident, as well as varietal experiences of time that occur for people during hospitalization, relating to experiences of nursing practice. The  tension associated with the temptation to apply scientific explanations to metaphysical questions, and the inevitability of accepting ongoing wonder about the mysteries of time, are featured throughout.
description: Journal of Applied Hermeneutics, 2018
Soil properties and land use affecting soil water dynamics in Andisols and Inceptisols at two mid-elevation sites in the Colombian Andes
Creators: name: Roa-García, Clara
Publisher: name: University of British Columbia
Year: 2018

description: Soil has a crucial role in the terrestrial component of the hydrologic cycle, regulating the availability of water for ecosystem services. Yet relationships between soil properties and land use for the major soil types in the Colombian Andes have not been extensively studied. This study evaluated soil water (SW) dynamics of two soils types, belonging to the most common soil orders in the Colombian Andes, Andisols and Inceptisols. The research was conducted in two watersheds at mid-elevation, and focused on the relationships between mineralogical, physical and chemical soil properties with soil water dynamics, including soil water retention (SWR) and field saturated hydraulic conductivity (Kfs). The Andisols and Inceptisols of this study have a large total porosity compared to typical clay soils, but Andisols, showed higher SWR at every soil tension relative to Inceptisols. Notwithstanding the high hygroscopic water (θPWP), both soils have a wide pore size distribution, with similar gravitational water and plant available water storage capacities. Despite differences in climate and soil parent material between watersheds, the presence of colloids with high specific surface area in both soils (allophane, imogolite, ferrihydrite and organo-metallic complexes in Andisols and ferrihydrite and Al/Fe oxides in Inceptisols) contribute to high SWR. Within each site, differences in SWR between land uses appear minimal, although soil organic carbon was lower under pasture in both soils. The limited differences in SWR between natural forest and pasture appear to reflect the effects of short-range order (SRO) minerals and organo-metallic compounds on SWR, which offset differences in SOC between natural forest and pasture. Quasi steady-state infiltration rates measured in the field did not correspond to expected values based on texture alone, highlighting the importance of field based measurements, particularly in soils with SRO minerals. Additionally, there was a pronounced seasonal difference in Kfs under pasture in both soil types, and a negative correlation of soil water content with Kfs in Inceptisols. Determination of physical, chemical and mineralogical properties was found to be crucial in understanding soil water dynamics in this study, and future work should include an assessment of SRO minerals in addition to SWR characteristics.
Apical oxygens and correlation strength in electron and hole doped copper oxides
Creators: name: Weber, Cedric
name: Haule, Kristjan
name: Kotliar, Gabriel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use the Local Density Approximation in combination with the Dynamical Mean Field Theory to carry out a comparative investigation of a typical electron doped and a typical hole doped copper oxide, NCCO and LSCO respectively. The parent compounds of both materials are strongly correlated electron systems in the vicinity of the metal to charge transfer insulator transition. In NCCO the magnetic long range order is essential to open a charge transfer gap, while Mott physics is responsible for the gap in LSCO. We highlights the role of the apical oxygens in determining the strength of the correlations and obtaining overall good agreement between theory and several experimentally determined quantities. Results for optical conductivity, polarized X-ray absorption and angle resolved photoemission are presented and compared with experiments.
description: submitted to PRB