cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The size, shape, and dynamics of cellular blebs
Creators: name: Lim, Fong Yin
name: Chiam, Keng-Hwee
name: Mahadevan, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: A cellular bleb grows when a portion of the cell membrane detaches from the underlying cortex under the influence of a cytoplasmic pressure. We develop a quantitative model for the growth and dynamics of these objects in a simple two-dimensional setting. In particular, we first find the minimum cytoplasmic pressure and minimum unsupported membrane length for a stationary bleb to nucleate and grow as a function of the membrane-cortex adhesion. We next show how a bleb may travel around the periphery of the cell when the cytoplasmic pressure varies in space and time in a prescribed way and find that the traveling speed is governed by the speed of the pressure change induced by local cortical contraction while the shape of the traveling bleb is governed by the speed of cortical healing. Finally, we relax the assumption that the pressure change is prescribed and couple it hydrodynamically to the cortical contraction and membrane deformation. By quantifying the phase space of bleb formation and dynamics, our framework serves to delineate the range and scope of bleb-associated cell motility and synthesizes a variety of experimental observations.
The fate of methane in the reaction furnace of a modified claus plant
Creators: name: Chin, Hilton S. F.
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: TP156 .O9 C49 2000
subject: Methane - Thermal properties
subject: Oxidation
subject: Hydrogen Sulphide - Thermal properties
subject: Furnaces--Combustion.
subject: Desulphurization
subject: Thermodynamics

description: Bibliography: p. 242-251.
The design and evaluation of a curriculum in developmental pediatrics for use in a pediatric residency program
Creators: name: Veale, Pamela Margaret
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: RJ80 .V43 2000
subject: Pediatrics - Study and teaching
subject: Curriculum planning
subject: Residents (Medicine) - Training of
subject: Child development

description: Bibliography: p. 155-164.
The public's right of effective access to information in the environmental assessment process
Creators: name: McKay-Panos, Linda Mae
Publisher: name: Law
Year: 2000
Subjects: subject: KF5753 .M25 2000A
subject: Freedom of information - Canada
subject: Privacy, Right of - Canada
subject: Environmental impact analysis - Canada
subject: Government information - Canada
subject: Public interest - Canada

description: Bibliography: p. 185-201
On the index of product systems of Hilbert modules
Creators: name: Kečkić, Dragoljub J.
name: Vujošević, Biljana
Publisher: name: arXiv
Year: 2011
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L53, 46L55 (Primary) 60G20 (Secondary)

description: In this note we prove that the set of all uniformly continuous units on a product system over a C* algebra B can be endowed with the structure of left right B - B Hilbert module after identifying similar units by the suitable equivalence relation. We use this construction to define the index of the initial product system, and prove that it is the generalization of earlier defined indices by Arveson (in the case B=C) and Skeide (in the case of spatial product system). We prove that such defined index is a covariant functor from the category od continuous product systems to the category of B bimodules. We also prove that the index is subadditive with respect to the outer tensor product of product systems, and prove additional properties of the index of product systems that can be embedded into a spatial one.
Multivariant levels of interpretations on selected caryas
Creators: name: Bhattacherjee, Rupa
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: BQ5065 .C373 B49 2000
subject: Cary-ag-iti
subject: Buddhist poetry - History and criticism
subject: Tantric Buddhism

description: Bibliography: p. 164-169.
A History of Medicine and Doctors in Columbia County, Oregon, from 1829-1910
Creators: name: Ross, John M.
Publisher: name: Unknown
Year: 1940
Subjects: Good Samaritan Hospital & Medical Center (Portland, Or.)
History, 19th Century
History, 20th Century
Hospital Medicine
Oregon

description: This text chronicles early implementation of western medicine from settlers coming across the United States who made their home and built their practices in Oregon between 1829 and 1910. Filled with anecdotes about common ailments that were dealt with, like typhoid, malaria, and smallpox, including some more difficult and devastating outbreaks that left thousands dead, as well as a story of quackery, this document serves as a snapshot of a time period with tremendous challenges and changes in medical care.
A Bayesian Joinpoint regression model with an unknown number of break-points
Creators: name: Martinez-Beneito, Miguel A.
name: García-Donato, Gonzalo
name: Salmerón, Diego
Publisher: name: arXiv
Year: 2011
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Joinpoint regression is used to determine the number of segments needed to adequately explain the relationship between two variables. This methodology can be widely applied to real problems, but we focus on epidemiological data, the main goal being to uncover changes in the mortality time trend of a specific disease under study. Traditionally, Joinpoint regression problems have paid little or no attention to the quantification of uncertainty in the estimation of the number of change-points. In this context, we found a satisfactory way to handle the problem in the Bayesian methodology. Nevertheless, this novel approach involves significant difficulties (both theoretical and practical) since it implicitly entails a model selection (or testing) problem. In this study we face these challenges through (i) a novel reparameterization of the model, (ii) a conscientious definition of the prior distributions used and (iii) an encompassing approach which allows the use of MCMC simulation-based techniques to derive the results. The resulting methodology is flexible enough to make it possible to consider mortality counts (for epidemiological applications) as Poisson variables. The methodology is applied to the study of annual breast cancer mortality during the period 1980--2007 in Castellón, a province in Spain.
description: Published in at http://dx.doi.org/10.1214/11-AOAS471 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Encomplexed Brown Invariant of Real Algebraic Surfaces in RP^3
Creators: name: Björklund, Johan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We construct an invariant of parametrized generic real algebraic surfaces in RP^3 which generalizes the Brown invariant of immersed surfaces from smooth topology. The invariant is constructed using the self intersection, which is a real algebraic curve with points of three local characters: the intersection of two real sheets, the intersection of two complex conjugate sheets or a Whitney umbrella. The Brown invariant was expressed through a self linking number of the self intersection by Kirby and Melvin. We extend the definition of this self linking number to the case of parametrized generic real algebraic surfaces.
Asymptotic behavior of Structures made of Plates
Creators: name: Griso, Georges
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The aim of this work is to study the asymptotic behavior of a structure made of plates of thickness $2δ$ when $δ\to 0$. This study is carried on within the frame of linear elasticity by using the unfolding method. It is based on several decompositions of the structure displacements and on the passing to the limit in fixed domains. We begin with studying the displacements of a plate. We show that any displacement is the sum of an elementary displacement concerning the normal lines on the middle surface of the plate and a residual displacement linked to these normal lines deformations. An elementary displacement is linear with respect to the variable $x$3. It is written $U(^x)+R(^x)\land x3e3$ where U is a displacement of the mid-surface of the plate. We show a priori estimates and convergence results when $δ\to 0$. We characterize the limits of the unfolded displacements of a plate as well as the limits of the unfolded of the strained tensor. Then we extend these results to the structures made of plates. We show that any displacement of a structure is the sum of an elementary displacement of each plate and of a residual displacement. The elementary displacements of the structure (e.d.p.s.) coincide with elementary rods displacements in the junctions. Any e.d.p.s. is given by two functions belonging to $H1(S;R3)$ where S is the skeleton of the structure (the plates mid-surfaces set). One of these functions : U is the skeleton displacement. We show that U is the sum of an extensional displacement and of an inextensional one. The first one characterizes the membrane displacements and the second one is a rigid displacement in the direction of the plates and it characterizes the plates flexion. Eventually we pass to the limit as $δ\to 0$ in the linearized elasticity system, on the one hand we obtain a variational problem that is satisfied by the limit extensional displacement, and on the other hand, a variational problem satisfied by the limit of inextensional displacements.
Entanglement and particle correlations of Fermi gases in harmonic traps
Creators: name: Vicari, Ettore
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate quantum correlations in the ground state of noninteracting Fermi gases of N particles trapped by an external space-dependent harmonic potential, in any dimension. For this purpose, we compute one-particle correlations, particle fluctuations and bipartite entanglement entropies of extended space regions, and study their large-N scaling behaviors. The half-space von Neumann entanglement entropy is computed for any dimension, obtaining S_HS = c_l N^(d-1)/d ln N, analogously to homogenous systems, with c_l=1/6, 1/(6\sqrt{2}), 1/(6\sqrt{6}) in one, two and three dimensions respectively. We show that the asymptotic large-N relation S_A\approx π^2 V_A/3, between the von Neumann entanglement entropy S_A and particle variance V_A of an extended space region A, holds for any subsystem A and in any dimension, analogously to homogeneous noninteracting Fermi gases.
description: 15 pages, 22 figs
Ion irradiation tolerance of graphene as studied by atomistic simulations
Creators: name: Åhlgren, E. H.
name: Kotakoski, J.
name: Lehtinen, O.
name: Krasheninnikov, A. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: As impermeable to gas molecules and at the same time transparent to high-energy ions, graphene has been suggested as a window material for separating a high-vacuum ion beam system from targets kept at ambient conditions. However, accumulation of irradiation-induced damage in the graphene membrane may give rise to its mechanical failure. Using atomistic simulations, we demonstrate that irradiated graphene even with a high vacancy concentration does not show signs of such instability, indicating a considerable robustness of graphene windows. We further show that upper and lower estimates for the irradiation damage in graphene can be set using a simple model.
Impact of information and computer technology on the workers of tomorrow
Creators: name: Dyck, Cheryl
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: LC149.5 .D93 2000
subject: Computers and literacy
subject: High technology and education
subject: Working class--education
subject: Workplace literacy
subject: Technology
subject: Organizational effectiveness

description: Bibliography: p. 103-104
Ecological knowledge of the Dene tha': traditional subsistence activities and childhood socialization
Creators: name: Harvey-Trigoso, Kim
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: E99 .D3 H37 1999
subject: Dene Tha Indians--Alberta
subject: Dene Tha Indians--socialization--Alberta
subject: Indian children--Alberta--attitudes
subject: Ecology - Alberta

description: Bibliography: p. 156-163
SiPMs coated with TPB : coating protocol and characterization for NEXT
Creators: name: Álvarez, V.
name: Agramunt, J.
name: Ball, M.
name: Batallé, M.
name: Bayarri, J.
name: Borges, F. I. G.
name: Bolink, H.
name: Brine, H.
name: Cárcel, S.
name: Carmona, J. M.
name: Castel, J.
name: Catalá, J. M.
name: Cebrián, S.
name: Cervera, A.
name: Chan, D.
name: Conde, C. A. N.
name: Dafni, T.
name: Dias, T. H. V. T.
name: Díaz, J.
name: Esteve, R.
name: Evtoukhovitch, P.
name: Ferrando, J.
name: Fernandes, L. M. P.
name: Ferrario, P.
name: Ferreira, A. L.
name: Ferrer-Ribas, E.
name: Freitas, E. D. C.
name: García, S. A.
name: Gil, A.
name: Giomataris, I.
name: Goldschmidt, A.
name: Gómez, E.
name: Gómez, H.
name: Gómez-Cadenas, J. J.
name: González, K.
name: Gutiérrez, R. M.
name: Hauptman, J.
name: Hernando-Morata, J. A.
name: Herrera, D. C.
name: Herrero, V.
name: Iguaz, F. J.
name: Irastorza, I. G.
name: Kalinnikov, V.
name: Labarga, L.
name: Liubarsky, I.
name: Lopes, J. A. M.
name: Lorca, D.
name: Losada, M.
name: Luzón, G.
name: Marí, A.
name: Martin-Albo, J.
name: Méndez, A. M.
name: Miller, T.
name: Moisenko, A.
name: Monrabal, F.
name: Monteiro, C. M. B.
name: Monzó, J. M.
name: Mora, F. J.
name: Vidal, J. Muñoz
name: da Luz, H. Natal
name: Navarro, G.
name: Nebot, M.
name: Nygren, D.
name: Oliveira, C. A. B.
name: Palma, R.
name: Aparicio, J. L. Pérez
name: Pérez, J.
name: Radicioni, E.
name: Quinto, M.
name: Renner, J.
name: Ripoll, L.
name: Rodriguez, A.
name: Rodriguez, J.
name: Santos, F. P.
name: Santos, J. M. F. dos
name: Seguí, L.
name: Serra, L.
name: Shuman, D.
name: Sofka, C.
name: Sorel, M.
name: Soriano, A.
name: Spieler, H.
name: Toledo, J. F.
name: Collell, J. Torrent
name: Tomás, A.
name: Tsamalaidze, Z.
name: Vázquez, D.
name: Velicheva, E.
name: Veloso, J. F. C. A.
name: Villar, J. A.
name: Webb, R.
name: Weber, T.
name: White, J. T.
name: Yahlali, N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Silicon photomultipliers (SiPM) are the photon detectors chosen for the tracking readout in NEXT, a neutrinoless ββ decay experiment which uses a high pressure gaseous xenon time projection chamber (TPC). The reconstruction of event track and topology in this gaseous detector is a key handle for background rejection. Among the commercially available sensors that can be used for tracking, SiPMs offer important advantages, mainly high gain, ruggedness, cost-effectiveness and radio-purity. Their main drawback, however, is their non sensitivity in the emission spectrum of the xenon scintillation (peak at 175 nm). This is overcome by coating these sensors with the organic wavelength shifter tetraphenyl butadienne (TPB). In this paper we describe the protocol developed for coating the SiPMs with TPB and the measurements performed for characterizing the coatings as well as the performance of the coated sensors in the UV-VUV range.
description: Submitted to the Journal of Instrumentation on december 26th 2011
Coexisting pseudogap, charge transfer gap, and Mott gap energy scales in the resonant inelastic x-ray scattering spectra of electron-doped cuprates
Creators: name: Basak, Susmita
name: Das, Tanmoy
name: Lin, Hsin
name: Hasan, M. Z.
name: Markiewicz, R. S.
name: Bansil, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a computation of Cu K-edge resonant inelastic x-ray scattering (RIXS) spectra for electron-doped cuprates which includes coupling to bosonic fluctuations. Comparison with experiment over a wide range of energy and momentum transfers allows us to identify the signatures of three key normal-state energy scales: the pseudogap, charge transfer gap, and Mott gap. The calculations involve a three band Hubbard Hamiltonian based on Cu $d_{x^2-y^2}$ and O $p_x$, $p_y$ orbitals, with a self-energy correction which arises due to spin and charge fluctuations. Our theory reproduces characteristic features e.g., gap collapse, large spectral weight broadening, and spectral weight transfer as a function of doping, as seen in experiments.
description: 5 pages, 4 figures
The interaction between co2 enrichment and salinity on growth and carbon partitioning in .phaseolus vulgaris L.
Creators: name: Bray, Shirley M.
Publisher: name: University of Calgary
Year: 1998
Subjects: subject: QK753 .C3 B73 1998
subject: Plants, Effect of carbon dioxide on
subject: Plants, effect of salt on
subject: Common bean
subject: Growth (Plants)
subject: Plant-soil relationships

description: Bibliography: p. 358-415.
Satellites of Legendrian knots and representations of the Chekanov-Eliashberg algebra
Creators: name: Ng, Lenhard
name: Rutherford, Dan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Symplectic Geometry (math.SG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R17 (Primary) 53D42, 57M25 (Secondary)

description: We study satellites of Legendrian knots in R^3 and their relation to the Chekanov-Eliashberg differential graded algebra of the knot. In particular, we generalize the well-known correspondence between rulings of a Legendrian knot in R^3 and augmentations of its DGA by showing that the DGA has finite-dimensional representations if and only if there exist certain rulings of satellites of the knot. We derive several consequences of this result, notably that the question of existence of ungraded finite-dimensional representations for the DGA of a Legendrian knot depends only on the topological type and Thurston-Bennequin number of the knot.
description: 43 pages
Cosmological New Massive Gravity and Galilean Conformal Algebra in 2-dimensions
Creators: name: Setare, M. R.
name: Kamali, V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the present paper we consider the realization of $2-$dimensional Galilean conformal algebra ($GCA_2$) on the boundary of cosmological new massive gravity. At first we consider the contracted BTZ black hole solution. We obtain entropy formula for the $GCA_2$ in term of contracted scaling dimension $Δ$ and central charge $C_1$. This entropy formula exactly matches with the non-relativistic limit of Bekenstein-Hawking entropy of BTZ black hole. Then we extend our study to the contracted warped $AdS_3$ black hole solution of CNMG. We obtain the entropy of dual $GCA_2$ in terms of central charges and finite temperatures, $T_1, T_2$. Again this expression coincides with the non-relativistic limit of Bekenstein-Hawking entropy formula of warped $AdS_3$ black hole.
description: 11 pages, no figure. arXiv admin note: text overlap with arXiv:1103.0457, arXiv:1102.0082, arXiv:1101.2339, arXiv:1202.4917
Asymptotics of Wigner 3nj-symbols with Small and Large Angular Momenta: an Elementary Method
Creators: name: Bonzom, Valentin
name: Fleury, Pierre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Yu and Littlejohn recently studied in arXiv:1104.1499 some asymptotics of Wigner symbols with some small and large angular momenta. They found that in this regime the essential information is captured by the geometry of a tetrahedron, and gave new formulae for 9j, 12j and 15j-symbols. We present here an alternative derivation which leads to a simpler formula, based on the use of the Ponzano-Regge formula for the relevant tetrahedron. The approach is generalized to Wigner 3nj-symbols with some large and small angular momenta, where more than one tetrahedron is needed, leading to new asymptotics for Wigner 3nj-symbols. As an illustration, we present 15j-symbols with one, two and four small angular momenta, and give an alternative formula to Yu's recent 15j-symbol with three small spins.
description: 17 pages
Error estimate and unfolding for periodic homogenization
Creators: name: Griso, Georges
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper deals with the error estimate in problems of periodic homogenization. The methods used are those of the periodic unfolding. We give the upper bound of the distance between the unfolded gradient of a function belonging to $H1(Ω)$ and the space $\nabla_x H^1(Ω)\oplus \nabla_y L^2(Ω; H^1_{per}(Y))$. These distances are obtained thanks to a technical result presented in Theorem 2.3: the periodic defect of a harmonic function belonging to $H1(Y)$ is written with the help of the norms $H^{1/2}$ of its traces diff erences on the opposite faces of the cell $Y$. The error estimate is obtained without any supplementary hypothesis of regularity on correctors.
Synthesis and biological activity of brassinolide and analogues: approaches towards the synthesis of xestobergsterol A
Creators: name: Andersen, Denise Lyn
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: QK898 .B85 A53 1999
subject: Brassinolide
subject: Brassinosteroids - Synthesis
subject: Plant growth promoting substances

description: Bibliography : p. 252-263.
On the unmixing of MEx/OMEGA hyperspectral data
Creators: name: Themelis, Konstantinos E.
name: Schmidt, Frédéric
name: Sykioti, Olga
name: Rontogiannis, Athanasios A.
name: Koutroumbas, Konstantinos D.
name: Daglis, Ioannis A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This article presents a comparative study of three different types of estimators used for supervised linear unmixing of two MEx/OMEGA hyperspectral cubes. The algorithms take into account the constraints of the abundance fractions, in order to get physically interpretable results. Abundance maps show that the Bayesian maximum a posteriori probability (MAP) estimator proposed in Themelis and Rontogiannis (2008) outperforms the other two schemes, offering a compromise between complexity and estimation performance. Thus, the MAP estimator is a candidate algorithm to perform ice and minerals detection on large hyperspectral datasets.
Nonequilibrium Damping of Collective Motion of Homogeneous Cold Fermi Condensates with Feshbach Resonances
Creators: name: Lin, Chi-Yong
name: Lee, Da-Shin
name: Rivers, Ray J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Collisionless damping of a condensate of cold Fermi atoms, whose scattering is controlled by a Feshbach resonance, is explored throughout the BCS and BEC regimes when small perturbations on its phase and amplitude modes are turned on to drive the system slightly out of equilibrium. Using a one-loop effective action, we first recreate the known result that for a broad resonance the amplitude of the condensate decays as $t^{-1/2}$ at late times in the BCS regime whereas it decays as $t^{-3/2}$ in the BEC regime. We then examine the case of an idealized narrow resonance, and find that this collective mode decays as $t^{-3/2}$ throughout both the BCS and BEC regimes. Although this seems to contradict earlier results that damping is identical for both broad and narrow resonances, the breakdown of the narrow resonance limit restores this universal behaviour. More measureably, the phase perturbation may give a shift on the saturated value to which the collective amplitude mode decays, which vanishes only in the deep BCS regime when the phase and amplitude modes are decoupled.
description: 9 pages, 1 figure
Experimental investigation of multiple solutions for liquid holdup in upward inclined stratified flow
Creators: name: Smith, Steven P.
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: TA 357.5 M84 S65 1999
subject: Multiphase flow
subject: Fluid dynamics
subject: Pipe - Fluid dynamics
subject: Stratified flow

description: Bibliography: p. 79-83
Controlling methane emissions from heavy oil wells: Gas clustering simulation and optimization modeling
Creators: name: Yang, Min
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: TN 871 Y368 1999
subject: Oil wells - Environmental aspects - Lloydminster Region (Sask. and Alta.)
subject: Heavy oil - Lloydminster Region (Sask. and Alta.)

description: Bibliography: p. 155-163
Methane Flux Dynamics in the Prairie Pothole Wetlands
Creators: name: Alberts, Brett
name: Chase Jr, Marlin
name: McCormick, Maeve
name: Lemming, Jennifer
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 370199
subject: Atmospheric sciences not elsewhere classified
classificationCode: 410299
subject: Ecological applications not elsewhere classified

description: This project, "Methane Flux Dynamics in the Prairie Pothole Wetlands" was completed in 2021 by students who participated in Earth Lab's HDR Earth Data Science Corps (EDSC) summer internship, which focuses on teaching technical data science skills to diverse student populations.
title: A cellular automata rule placing a maximal number of dominoes in the square and diamond
Creators: name: Hoffmann, Rolf
name: Désérable, Dominique
name: Seredyński, Franciszek
Publisher: name: Springer Science
Year: 2024

description: The objective is to demonstrate that a probabilistic cellular automata rule can place reliably a maximal number of dominoes in different active area shapes, exemplarily evaluated for the square and diamond. The basic rule forms domino patterns, but the number of dominoes is not necessarily maximal and the patterns are not always stable. It works with templates derived from domino tiles. The first proposed enhancement (Rule Option 1) can form always stable patterns. The second enhancement (Rule Option 2) can maximize the number of dominoes, but the reached patterns are not always stable. All rules drive the evolution by specific noise injection.
The estimate of emission region locations of {\it Fermi} FSRQs
Creators: name: Yan, Dahai
name: Zeng, Houdun
name: Zhang, Li
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the locations of emission regions through modelling the quasi-simultaneous multi-frequency spectral energy distributions of 21 {\it Fermi} flat spectrum radio quasars (FSRQs) in the frame of a multi-component one-zone leptonic model. In our calculations, we take the detailed broad line region (BLR) structure into account and discuss the effect of the uncertainty of the BLR structure on constraining the location of the emission regions for each FSQR, meanwhile we also include both the internal and external absorptions. Our results indicate that (1) the contribution of external Compton-BLR component is important to $γ$-ray emission, and the energy density of external target photon fields depends on the location of the emission region, which can be derived through reproducing the observed $γ$-ray emission, and (2) the emission regions of FSRQs with relative low accretion disk luminosity lie in the region of $7.9\times10^{16}$\ --\ $1.3\times10^{18}$\ cm (300 -- 4300 Schwarzschild radii) from central black hole, and for FSRQs with high accretion disk luminosity, the emission regions locate in the larger region of $2.6\times10^{17}$\ --\ $4.2\times10^{18}$\ cm (300 -- 5600 Schwarzschild radii).
description: 10 pages, 10 figures, 1 table. Accepted for publication in PASJ
The attitudes and knowledge levels of social work and nursing students toward the elderly
Creators: name: Bianchini, Patricia E.
Publisher: name: Social Work
Year: 2000
Subjects: subject: HV1475 .A4 B53 2000
subject: Gerontology--study and teaching (higher)--Alberta--Calgary
subject: Social work with the aged--study and teaching (higher)--Alberta--Calgary
subject: Social work education--study and teaching (higher)--Alberta--Calgary
subject: Students - Alberta - Calgary - Attitudes
subject: Social service - Alberta - Calgary

description: Bibliography: p. 112-124
Spatial Coherence of a polariton condensate in 1D acoustic lattice
Creators: name: Tsyplyatyev, O.
name: Whittaker, D. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Several mechanisms are discussed which could determine the spatial coherence of a polariton condensate confined to a one dimensional wire. The mechanisms considered are polariton-polariton interactions, disorder scattering and non-equilibrium occupation of finite momentum modes. For each case, the shape of the resulting spatial coherence function g1(x) is analysed. The results are compared with the experimental data on a polariton condensate in an acoustic lattice from [E. A. Cerda-Mendez et al, Phys. Rev. Lett. 105, 116402 (2010)]. It is concluded that the shape of g1(x) can only be explained by non-equilibrium effects, and that ~10 modes are occupied in the experimental system.
description: 6 pages, 4 figures
Flows on Simplicial Complexes
Creators: name: Beck, Matthias
name: Kemper, Yvonne
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E45, 05C21

description: Given a graph $G$, the number of nowhere-zero $\ZZ_q$-flows $ϕ_G(q)$ is known to be a polynomial in $q$. We extend the definition of nowhere-zero $\ZZ_q$-flows to simplicial complexes $Δ$ of dimension greater than one, and prove the polynomiality of the corresponding function $ϕ_Δ(q)$ for certain $q$ and certain subclasses of simplicial complexes.
description: 10 pages, to appear in Discrete Mathematics and Theoretical Computer Science (proceedings of FPSAC'12)
Technical Report: Full Version of Analyzing and Optimizing Perturbation of DP-SGD Geometrically
Creators: name: Duan, Jiawei
name: Hu, Haibo
name: Ye, Qingqing
name: Sun, Xinyue
Publisher: name: arXiv
Year: 2025
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Differential privacy (DP) has become a prevalent privacy model in a wide range of machine learning tasks, especially after the debut of DP-SGD. However, DP-SGD, which directly perturbs gradients in the training iterations, fails to mitigate the negative impacts of noise on gradient direction. As a result, DP-SGD is often inefficient. Although various solutions (e.g., clipping to reduce the sensitivity of gradients and amplifying privacy bounds to save privacy budgets) are proposed to trade privacy for model efficiency, the root cause of its inefficiency is yet unveiled.
 In this work, we first generalize DP-SGD and theoretically derive the impact of DP noise on the training process. Our analysis reveals that, in terms of a perturbed gradient, only the noise on direction has eminent impact on the model efficiency while that on magnitude can be mitigated by optimization techniques, i.e., fine-tuning gradient clipping and learning rate. Besides, we confirm that traditional DP introduces biased noise on the direction when adding unbiased noise to the gradient itself. Overall, the perturbation of DP-SGD is actually sub-optimal from a geometric perspective. Motivated by this, we design a geometric perturbation strategy GeoDP within the DP framework, which perturbs the direction and the magnitude of a gradient, respectively. By directly reducing the noise on the direction, GeoDP mitigates the negative impact of DP noise on model efficiency with the same DP guarantee. Extensive experiments on two public datasets (i.e., MNIST and CIFAR-10), one synthetic dataset and three prevalent models (i.e., Logistic Regression, CNN and ResNet) confirm the effectiveness and generality of our strategy.
description: This is the full version of our paper "Analyzing and Optimizing Perturbation of DP-SGD Geometrically", which will appear in ICDE 2025 as a regular research paper
Numerical study of self-gravitating protoplanetary discs
Creators: name: Faghei, Kazem
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this paper, the effect of self-gravity on the protoplanetary discs is investigated. The mechanisms of angular momentum transport and energy dissipation are assumed to be the viscosity due to turbulence in the accretion disc. The energy equation is considered in situation that the released energy by viscosity dissipation is balanced with cooling processes. The viscosity is obtained by equality of dissipation and cooling functions, and is used for angular momentum equation. The cooling rate of the flow is calculated by a prescription, $d u/d t=-u/τ_{cool}$, that $u$ and $τ_{cool}$ are internal energy and cooling timescale, respectively. The ratio of local cooling to dynamical timescales $Ωτ_{cool}$ is assumed as a constant and also as a function of local temperature. The solutions for protoplanetary discs show that in situation of $Ωτ_{cool} = constant$, the disc does not show any gravitational instability in small radii for a typically mass accretion rate, $\dot{M} = 10^{-6} M_{\odot} yr^{-1}$, while by choosing $Ωτ_{cool}$ as a function of temperature, the gravitational instability for this amount of mass accretion rate or even less can occur in small radii. Also, by study of the viscous parameter $α$, we find that the strength of turbulence in the inner part of self-gravitating protoplanetary discs is very low. These results are qualitatively consistent with direct numerical simulations of protoplanetary discs.
description: 13 pages, 5 figures, accepted by RAA
Symmetric minimal quantum tomography by successive measurements
Creators: name: Kalev, Amir
name: Shang, Jiangwei
name: Englert, Berthold-Georg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the implementation of a symmetric informationally complete probability-operator measurement (SIC POM) in the Hilbert space of a d-level system by a two-step measurement process: a diagonal-operator measurement with high-rank outcomes, followed by a rank-1 measurement in a basis chosen in accordance with the result of the first measurement. We find that any Heisenberg-Weyl group-covariant SIC POM can be realized by such a sequence where the second measurement is simply a measurement in the Fourier basis, independent of the result of the first measurement. Furthermore, at least for the particular cases studied, of dimension 2, 3, 4, and 8, this scheme reveals an unexpected operational relation between mutually unbiased bases and SIC POMs; the former are used to construct the latter. As a laboratory application of the two-step measurement process, we propose feasible optical experiments that would realize SIC POMs in various dimensions.
description: 7 pages, 2 figures
title: Miyakma
Creators: name: Lahaussois, Aimée
Publisher: name: Pangloss
Year: 2011
Subjects: subject: Linguistique
subject: Thulung Rai
subject: Deusa

description: Proto-history : Ur-mother
description: This is the story of the first human, Miyakma, and how she gave birth to a thorny plant, a tiger, a bear, a monkey and a boy and a girl. Because there are no other humans around, the sister and brother eventually mate, bringing upon themselves the wrath of Khomda, the god who is their father. As a punishment, he sends them down into the bowels of the earth, and after many generations, they attempt to return above ground. They manage to escape by performing a human sacrifice, and realize that they need to dispose of the body of the victim. This leads them to create a "death culture", dealing with corpses differently according to whether the person died by accident or of old age. This "death culture" survives to this day.
Stark Broadening and White Dwarfs
Creators: name: Dimitrijevic, Milan S.
name: Kovacevic, Andjelka
name: Simic, Zoran
name: Sahal-Brechot, Sylvie
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: White dwarf and pre-white dwarf atmospheres are one of the best examples for the application of Stark broadening research results in astrophysics, due to plasma conditions very favorable for this line broadening mechanism. For example in hot hydrogen-deficient (pre-) white dwarf stars Teff = 75 000 K - 180 000 K and log g = 5.5-8 [cgs]. Even for much cooler DA and DB white dwarfs with typical effective temperatures of 10 000 K - 20 000 K, Stark broadening is usually the dominant broadening mechanism. In this review, Stark broadening in white dwarf spectra is considered and the attention is drawn to the STARK-B database (http://stark-b.obspm.fr/), containing Stark broadening parameters needed for white dwarf spectra analysis and synthesis, as well as to the new search facilities which will provide the collective effort to develop Virtual Atomic and Molecular Data Center (VAMDC - http://vamdc.org/).
Study of the reaction e^{+}e^{-} -->J/psiπ^{+}π^{-} via initial-state radiation at BaBar
Creators: name: The BABAR Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the process $e^+e^-\to J/ψπ^{+}π^{-}$ with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the BaBar detector at center-of-mass energies 10.58 and 10.54 GeV, and correspond to an integrated luminosity of 454 $\mathrm{fb^{-1}}$. We investigate the $J/ψπ^{+}π^{-}$ mass distribution in the region from 3.5 to 5.5 $\mathrm{GeV/c^{2}}$. Below 3.7 $\mathrm{GeV/c^{2}}$ the $ψ(2S)$ signal dominates, and above 4 $\mathrm{GeV/c^{2}}$ there is a significant peak due to the Y(4260). A fit to the data in the range 3.74 -- 5.50 $\mathrm{GeV/c^{2}}$ yields a mass value $4244 \pm 5$ (stat) $ \pm 4$ (syst)$\mathrm{MeV/c^{2}}$ and a width value $114 ^{+16}_{-15}$ (stat)$ \pm 7$(syst)$\mathrm{MeV}$ for this state. We do not confirm the report from the Belle collaboration of a broad structure at 4.01 $\mathrm{GeV/c^{2}}$. In addition, we investigate the $π^{+}π^{-}$ system which results from Y(4260) decay.
Modification of conduction, drug interactions and gating in skeletal muscle sodium channels by u-conotoxins
Creators: name: Sierralta Cereceda, Ivan Eliodoro
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: QP321 .S524 2000
subject: Sodium channels
subject: Muscles - Electric properties
subject: Musculoskeletal system
subject: Peptides

description: Bibliogrpahy: p. 98-112. incomplete title - a symbol in front of u-conotoxins', not recognized in the Gencat database
Sedna and the Oort Cloud Around a Migrating Sun
Creators: name: Kaib, Nathan A.
name: Roškar, Rok
name: Quinn, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent numerical simulations have demonstrated that the Sun's dynamical history within the Milky Way may be much more complex than that suggested by its current low peculiar velocity. In particular, the Sun may have radially migrated through the galactic disk by up to 5-6 kpc. This has important ramifications for the structure of the Oort Cloud, as it means that the solar system may have experienced tidal and stellar perturbations that were significantly different from its current local galactic environment. To characterize the effects of solar migration within the Milky Way, we use direct numerical simulations to model the formation of an Oort Cloud around stars that end up on solar-type orbits in a galactic-scale simulation of a Milky Way-like disk formation. Surprisingly, our simulations indicate that Sedna's orbit may belong to the classical Oort Cloud. Contrary to previous understanding, we show that field star encounters play a pivotal role in setting the Oort Cloud's extreme inner edge, and due to their stochastic nature this inner edge sometimes extends to Sedna's orbit. The Sun's galactic migration heightens the chance of powerful stellar passages, and Sedna production occurs around ~20-30% of the solar-like stars we study. Considering the entire Oort Cloud, we find its median distance depends on the minimum galactocentric distance attained during the Sun's orbital history. The inner edge also shows a similar dependence but with increased scatter due to the effects of powerful stellar encounters. Both of these Oort Cloud parameters can vary by an order of magnitude and are usually overestimated by an Oort Cloud formation model that assumes a fixed galactic environment. In addition, the amount of material trapped in outer Oort Cloud orbits can be extremely low and may present difficulties for models of Oort Cloud formation and long-period comet production.
description: 54 pages, 3 tables, 18 figures, accepted to Icarus
A sustainable co-existence?: aboriginal rights and resource management in Canada
Creators: name: Sharvit, Cheryl Yvonne
Publisher: name: Law
Year: 1999
Subjects: subject: KF8210 .N37 S432 1999A
subject: Indians of North America--land tenure--Canada
subject: Indians of North America - Canada - Government relations
subject: Mediation and conciliation, Industrial - Canada
subject: Natural resources--law and legislation--Canada
subject: Wildlife conservation - Canada
subject: Conservation of natural resources--Canada

description: Bibliography: p. 236-258
La chanson goes hip-hop: local identity, globalization and contemporary music in Quebec nationalism
Creators: name: Entwisle, Stephen
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: ML3484.7 .Q4 E58 1999
subject: Popular music--Quebec--history and criticism
subject: Music--Quebec--political aspects
subject: Nationalism - Quebec (Province)
subject: Globalization

description: Bibliography: p. 157-168
Participation in the Bow Chinook barter community: Members' experiences
Creators: name: Berthold, Uta Christina
Publisher: name: Social Work
Year: 1999
Subjects: subject: HG660 .C35 B47 1999
subject: Money--social aspects--Alberta--Calgary
subject: Barter--Alberta--Calgary
subject: Local exchange trading systems--Alberta--Calgary
subject: Community organization - Alberta - Calgary
subject: Social service - Alberta - Calgary

description: Bibliography: p. 117-120
Superconducting qubit manipulated by fast pulses: experimental observation of distinct decoherence regimes
Creators: name: Chiarello, F.
name: Paladino, E.
name: Castellano, M. G.
name: Cosmelli, C.
name: D'Arrigo, A.
name: Torrioli, G.
name: Falci, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A particular superconducting quantum interference device (SQUID)qubit, indicated as double SQUID qubit, can be manipulated by rapidly modifying its potential with the application of fast flux pulses. In this system we observe coherent oscillations exhibiting non-exponential decay, indicating a non trivial decoherence mechanism. Moreover, by tuning the qubit in different conditions (different oscillation frequencies) by changing the pulse height, we observe a crossover between two distinct decoherence regimes and the existence of an "optimal" point where the qubit is only weakly sensitive to intrinsic noise. We find that this behaviour is in agreement with a model considering the decoherence caused essentially by low frequency noise contributions, and discuss the experimental results and possible issues.
description: 16 pages, 9 figures
Chargaff's "Grammar of Biology": New Fractal-like Rules
Creators: name: Yamagishi, Michel Eduardo Beleza
name: Herai, Roberto H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Genomics (q-bio.GN)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Chargaff once said that "I saw before me in dark contours the beginning of a grammar of Biology". In linguistics, "grammar" is the set of natural language rules, but we do not know for sure what Chargaff meant by "grammar" of Biology. Nevertheless, assuming the metaphor, Chargaff himself started a "grammar of Biology" discovering the so called Chargaff's rules. In this work, we further develop his grammar. Using new concepts, we were able to discovery new genomic rules that seem to be invariant across a large set of organisms, and show a fractal-like property, since no matter the scale, the same pattern is observed (self-similarity). We hope that these new invariant genomic rules may be used in different contexts since short read data bias detection to genome assembly quality assessment.
description: 17 pages
Eigenvalue distribution of the Dirac operator at finite temperature with (2+1)-flavor dynamical quarks using the HISQ action
Creators: name: Ohno, H.
name: Heller, U. M.
name: Karsch, F.
name: Mukherjee, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We report on the behavior of the eigenvalue distribution of the Dirac operator in (2+1)-flavor QCD at finite temperature, using the HISQ action. We calculate the eigenvalue density at several values of the temperature close to the pseudocritical temperature. For this study we use gauge field configurations generated on lattices of size $32^3 \times 8$ with two light quark masses corresponding to pion masses of about 160 and 115 MeV. We find that the eigenvalue density below $T_c$ receives large contributions from near-zero modes which become smaller as the temperature increases or the light quark mass decreases. Moreover we find no clear evidence for a gap in the eigenvalue density up to 1.1$T_c$. We also analyze the eigenvalue density near $T_c$ where it appears to show a power-law behavior consistent with what is expected in the critical region near the second order chiral symmetry restoring phase transition in the massless limit.
description: 7 pages, 7 figures, talk presented at the XXIX International Symposium on Lattice Field Theory, July 10-16 2011, Squaw Valley, Lake Tahoe, California, USA