cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Short to long-range charge-transfer excitations in the zincbacteriochlorin-bacteriochlorin complex: a Bethe-Salpeter study
Creators: name: Duchemin, I.
name: Deutsch, T.
name: Blase, X.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We study using the Bethe-Salpeter formalism the excitation energies of the zincbacteriochlorinbacteriochlorin dyad, a paradigmatic photosynthetic complex. In great contrast with standard timedependent density functional theory calculations with (semi)local kernels, charge transfer excitations are correctly located above the intramolecular Q-bands transitions found to be in excellent agreement with experiment. Further, the asymptotic Coulomb behavior towards the true quasiparticle gap for charge transfer excitations at long distance is correctly reproduced, showing that the present scheme allows to study with the same accuracy intramolecular and charge transfer excitations at various spatial range and screening environment without any adjustable parameter.
description: 5 pages, 2 figures, 1 table
Blue skies, black death: Risk, subculture issues, and gender in the contemporary skydiving community
Creators: name: Laurendeau, Jason
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: GV 770 L38 2000
subject: Skydiving
subject: Risk-taking (Psychology)
subject: Sex differences (Psychology)
subject: Sports - Sociological aspects

description: Bibliography: p. 155-164
Effect of particle polydispersity on the irreversible adsorption of fine particles on patterned substrates
Creators: name: Marques, J. F.
name: Lima, A. B.
name: Araujo, N. A. M.
name: Cadilhe, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We performed extensive Monte Carlo simulations of the irreversible adsorption of polydispersed disks inside the cells of a patterned substrate. The model captures relevant features of the irreversible adsorption of spherical colloidal particles on patterned substrates. The pattern consists of (equal) square cells, where adsorption can take place, centered at the vertices of a square lattice. Two independent, dimensionless parameters are required to control the geometry of the pattern, namely, the cell size and cell-cell distance, measured in terms of the average particle diameter. However, to describe the phase diagram, two additional dimensionless parameters, the minimum and maximum particle radii are also required. We find that the transition between any two adjacent regions of the phase diagram solely depends on the largest and smallest particle sizes, but not on the shape of the distribution function of the radii. We consider size dispersions up-to 20% of the average radius using a physically motivated truncated Gaussian-size distribution, and focus on the regime where adsorbing particles do not interact with those previously adsorbed on neighboring cells to characterize the jammed state structure. The study generalizes previous exact relations on monodisperse particles to account for size dispersion. Due to the presence of the pattern, the coverage shows a non-monotonic dependence on the cell size. The pattern also affects the radius of adsorbed particles, where one observes preferential adsorption of smaller radii particularly at high polydispersity.
description: 9 pages, 5 figures
Combatting & Measuring Fraud: GAO's Use of Ontology
Creators: name: Dickerson, Leia
Publisher: name: Zenodo
Year: 2023
Subjects: Ontologies
Taxonomies
Data Modeling

description: Fraud hurts the integrity of US federal programs and erodes the public’s trust in the government. To assist agencies with combatting fraud and to improve its measurement through common definitions, GAO has developed the GAO Fraud Ontology. The model addresses the key elements of what occurs in a fraud scheme affecting the federal government, related elements, and its implications. It also serves as the basis for the AntiFraud Resource, a site focused on educating federal program officials about fraud and strategies for assessing and managing their fraud risks. This presentation will detail the process used to to develop the ontology, how it is supporting GAO work, and future directions the work may take.
Shell closure effects studied via cluster decay in heavy nuclei
Creators: name: Kumar, Sushil
name: Ramna
name: Kumar, Rajesh
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The effects of shell closure in nuclei via the cluster decay is studied. In this context, we have made use of the Preformed Cluster Model ($PCM$) of Gupta and collaborators based on the Quantum Mechanical Fragmentation Theory. The key point in the cluster radioactivity is that it involves the interplay of close shell effects of parent and daughter. Small half life for a parent indicates shell stabilized daughter and long half life indicates the stability of the parent against the decay. In the cluster decay of trans lead nuclei observed so far, the end product is doubly magic lead or its neighbors. With this in our mind we have extended the idea of cluster radioactivity. We investigated decay of different nuclei where Zirconium is always taken as a daughter nucleus, which is very well known deformed nucleus. The branching ratio of cluster decay and $α$-decay is also studied for various nuclei, leading to magic or almost doubly magic daughter nuclei. The calculated cluster decay half-life are in well agreement with the observed data. First time a possibility of cluster decay in $^{218}U$ nucleus is predicted.
Fieldwork In The Evora District, Alentejo, Portugal, 1986-1988: A Preliminary Report
Creators: name: Burgess, Colin B
Publisher: name: Archaeology Data Service
Year: 2022

description: Northern Archaeology, 08, 35-105
description: An archaeological survey of an area about 250 sq km in extent immediately west of Evora in south-central Portugal has been proceeding for four to five weeks each summer in 1986-8, involving up to forty participants from Britain and Portugal. Man-made landscape features of all periods are being recorded and mapped, and detailed surveys made of selected sites and areas. A complementary programme of excavation of representative sites has begun, and an investigation of the geomorphology and soils of the area has also been carried out.
The role of voluntary non-regulatory initiatives inmanaging greenhouse gas emissions
Creators: name: Walz, Daryl E.
Publisher: name: Environmental Design
Year: 1999
Subjects: subject: TD885.5 .G73 W35 1999
subject: Greenhouse gases - Canada - Prevention
subject: Greenhouse gases - Environmental aspects - Canada
subject: Greenhouse gases - Government policy - Canada
subject: Environmental management--Canada
subject: Global warming

description: Bibliography: p. 167-174
Analytical and numerical study of the ground-track resonances of Dawn orbiting Vesta
Creators: name: Delsate, N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The aim of Dawn mission is the acquisition of data from orbits around two bodies, (4)Vesta and (1)Ceres, the two most massive asteroids. Due to the low thrust propulsion, Dawn will slowly cross and transit through ground-track resonances, where the perturbations on Dawn orbit may be significant. In this context, to safety go the Dawn mission from the approach orbit to the lowest science orbit, it is essential to know the properties of the crossed resonances. This paper analytically investigates the properties of the major ground-track resonances (1:1, 1:2, 2:3 and 3:2) appearing for Vesta orbiters: location of the equilibria, aperture of the resonances and period at the stable equilibria. We develop a general method using an averaged Hamiltonian formulation with a spherical harmonic approximation of the gravity field. If the values of the gravity field coefficient change, our method stays correct and applicable. We also discuss the effect of one uncertainty on the C20 and C22 coefficients on the properties of the 1:1 resonance. These results are checked by numerical tests. We determine that the increase of the eccentricity appearing in the 2:3 resonance is due to the C22 and S22 coefficients. Our method can be easily adapted to missions similar to Dawn because, contrarily to the numerical results, the analytical formalism stays the same and is valid for a wide range of physical parameters of the asteroid (namely the shape and the mass) as well as for different spacecraft orbits. Finally we numerically study the probability of the capture in resonance 1:1. Our paper reproduces, explains and supplements the results of Tricarico and Sykes (2010).
description: 34 pages, 9 figures, 10 Tables
Religiosity and hope: a study of Riverton teenagers
Creators: name: Pue, Carson Neal
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: HQ799 .C2 P84 1999
subject: Hope--religious aspects--Christianity
subject: Teenagers--religious life--Alberta
subject: Teenagers--Alberta
subject: Religiousness
subject: Christian life

description: Bibliography: p. 142-147
Stripes in cuprate superconductors: Excitations and dynamic dichotomy
Creators: name: Seibold, G.
name: Grilli, M.
name: Lorenzana, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a short account of the present experimental situation of stripes in cuprates followed by a review of our present understanding of their ground state and excited state properties. Collective modes, the dynamical structure factor, and the optical conductivity of stripes are computed using the time-dependent Gutzwiller approximation applied to realistic one band and three band Hubbard models, and are found to be in excellent agreement with experiment. On the other hand, experiments like angle-resolved photoemission and scanning tunneling microscopy show the coexistence of stripes at high energies with Fermi liquid quasiparticles at low energies. We show that a phenomenological model going beyond mean-field can reconcile this dynamic dichotomy.
description: 20 pages, 14 figures. Review paper for a Special Issue of Physica C on "Stripes and Electronic Liquid Crystals in Strongly Correlated Systems"
Methane oxidation in soils as a tool for reducing greenhouse gas emissions
Creators: name: Stein, Vincent Bradley
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: TD 885.5 M48 S74 2000
subject: Greenhouse gases
subject: Methane
subject: Soil oxidation
subject: Oxidation
subject: Bacteria

description: Bibliography: p. 110-118
Restoration of chiral symmetry in the large-N_c limit
Creators: name: Heinz, Achim
name: Giacosa, Francesco
name: Rischke, Dirk H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the large-N_c behavior of the critical temperature T_c for chiral symmetry restoration in the framework of the Nambu-Jona-Lasinio (NJL) model and the linear σ-model. While in the NJL case T_c scales as N_c^0 and is, as expected, of the same order as Λ_QCD (just as the deconfinement phase transition), in the σ-model the scaling behavior reads T_c \propto N_c^1/2. We investigate the origin of the different scaling behavior and present two improvements of the σ-model: (i) a simple, phenomenologically motivated temperature dependence of the parameters and (ii) the coupling to the Polyakov loop. Both approaches lead to the scaling T_c \propto N_c^0.
description: 4 pages, no figures
Updated gravitational-wave upper limits on the internal magnetic field strength of recycled pulsars
Creators: name: Mastrano, Alpha
name: Melatos, Andrew
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent calculations of the hydromagnetic deformation of a stratified, non-barotropic neutron star are generalized to describe objects with superconducting interiors, whose magnetic permeability μis much smaller than the vacuum value μ_0. It is found that the star remains oblate if the poloidal magnetic field energy is \gtrsim 40% of total magnetic field energy, that the toroidal field is confined to a torus which shrinks as μdecreases, and that the deformation is much larger (by a factor \sim μ_0/μ) than in a non-superconducting object. The results are applied to the latest direct and indirect upper limits on gravitational-wave emission from Laser Interferometer Gravitational Wave Observatory (LIGO) and radio pulse timing (spin-down) observations of 81 millisecond pulsars, to show how one can use these observations to infer the internal field strength. It is found that the indirect spin-down limits already imply astrophysically interesting constraints on the poloidal-toroidal field ratio and diamagnetic shielding factor (by which accretion reduces the observable external magnetic field, e.g. by burial). These constraints will improve following gravitational-wave detections, with implications for accretion-driven magnetic field evolution in recycled pulsars and the hydromagnetic stability of these objects' interiors.
description: 10 pages, 1 table, 4 figures
Block copolymer self-assembly: thermodynamics, kinetics and applications
Creators: name: Underhill, Royale Suzanne
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: QD382 .B5 U53 2000
subject: Block copolymers
subject: Micelles
subject: Polymers
subject: Polymer solutions

description: Bibliography: p. 237 - 249
Multi-Gigabit Wireless data transfer at 60 GHz
Creators: name: Soltveit, H. K.
name: Schöning, R. Brenner. A.
name: Wiedner, D.
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: In this paper we describe the status of the first prototype of the 60 GHz wireless Multi-gigabit data transfer topology currently under development at University of Heidelberg using IBM 130 nm SiGe HBT BiCMOS technology. The 60 GHz band is very suitable for high data rate and short distance applications as for example needed in the HEP experments. The wireless transceiver consist of a transmitter and a receiver. The transmitter includes an On-Off Keying (OOK) modulator, an Local Oscillator (LO), a Power Amplifier (PA) and a BandPass Filter (BPF). The receiver part is composed of a BandPass- Filter (BPF), a Low Noise Amplifier (LNA), a double balanced down-convert Gilbert mixer, a Local Oscillator (LO), then a BPF to remove the mixer introduced noise, an Intermediate Amplifier (IF), an On-Off Keying demodulator and a limiting amplifier. The first prototype would be able to handle a data-rate of about 3.5 Gbps over a link distance of 1 m. The first simulations of the LNA show that a Noise Figure (NF) of 5 dB, a power gain of 21 dB at 60 GHz with a 3 dB bandwidth of more than 20 GHz with a power consumption 11 mW are achieved. Simulations of the PA show an output referred compression point P1dB of 19.7 dB at 60 GHz.
description: Proceedings of the WIT2012
Market dominance and innovation in computer software markets
Creators: name: Hildebrandt, Kurtis Clayton
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: HD9696.63 .U62 H55 1999
subject: Microsoft corporation
subject: Computer software industry--United States
subject: Antitrust law--United States
subject: Competition, unfair--United States

description: Bibliogrpahy: p. 107-113
More on the Tensor Response of the QCD Vacuum to an External Magnetic Field
Creators: name: Gorsky, A.
name: Kopnin, P. N.
name: Krikun, A.
name: Vainshtein, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this Letter we discuss a few issues concerning the magnetic susceptibility of the quark condensate and the Son-Yamamoto (SY) anomaly matching equation. It is shown that the SY relation in the IR implies a nontrivial interplay between the kinetic and WZW terms in the chiral Lagrangian. It is also demonstrated that in a holographic framework an external magnetic field triggers mixing between scalar and tensor fields. Accounting for this, one may calculate the magnetic susceptibility of the quark condensate to all orders in the magnetic field.
description: 20 pages, 2 figures
The Occurrence and Speed of CMEs Related to Two Characteristic Evolution Patterns of Helicity Injection in Their Solar Source Regions
Creators: name: Park, Sung-Hong
name: Cho, Kyung-Suk
name: Bong, Su-Chan
name: Kumar, Pankaj
name: Chae, Jongchul
name: Liu, Rui
name: Wang, Haimin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Long-term (a few days) variation of magnetic helicity injection was calculated for 28 solar active regions which produced 47 CMEs to find its relationships with the CME occurrence and speed using SOHO/MDI line-of-sight magnetograms. As a result, we found that the 47 CMEs can be categorized into two different groups by two characteristic evolution patterns of helicity injection in their source active regions which appeared for about 0.5-4.5 days before their occurrence: (1) a monotonically increasing pattern with one sign of helicity (Group A; 30 CMEs in 23 active regions) and (2) a pattern of significant helicity injection followed by its sign reversal (Group B; 17 CMEs in 5 active regions). We also found that CME speed has a correlation with average helicity injection rate with linear correlation coefficients of 0.85 and 0.63 for Group A and Group B, respectively. In addition, these two CME groups show different characteristics as follows: (1) the average CME speed of Group B (1330km/s) is much faster than that of Group A (870km/s), (2) the CMEs in Group A tend to be single events, whereas those in Group B mainly consist of successive events, and (3) flares related to the CMEs in Group B are relatively more energetic and impulsive than those in Group A. Our findings therefore suggest that the two CME groups have different pre-CME conditions in their source active regions and different CME characteristics.
description: 25 pages, 7 figures, accepted for publication in ApJ
Advanced Space Propulsion Based on Vacuum (Spacetime Metric) Engineering
Creators: name: Puthoff, Harold E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: A theme that has come to the fore in advanced planning for long-range space exploration is the concept that empty space itself (the quantum vacuum, or spacetime metric) might be engineered so as to provide energy/thrust for future space vehicles. Although far-reaching, such a proposal is solidly grounded in modern physical theory, and therefore the possibility that matter/vacuum interactions might be engineered for space-flight applications is not a priori ruled out. As examples, the current development of theoretical physics addresses such topics as warp drives, traversable wormholes and time machines that provide for such vacuum engineering possibilities. We provide here from a broad perspective the physics and correlates/consequences of the engineering of the spacetime metric.
description: 8 pages, 3 figures
Psychophysiological arousal in problem and non-problem video lottery gamblers
Creators: name: Diskin, Katherine Mary
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: HV6713 .D57 2000
subject: Gambling--physiological aspects
subject: Gamblers--physiology
subject: Gamblers--psychology
subject: Video lottery terminals

description: Bibliography: p. 87-92
Quantification and assessment of caribou habitat fragmentation: An integrated remote sensing, GIS, and landscape ecology method
Creators: name: Deuling, Medina J.
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: QL737 .U55 D48 1999
subject: Woodland caribou--habitat--British Columbia
subject: Woodland caribou--effect of habitat modification on--British Columbia
subject: Fragmented landscapes
subject: Remote sensing
subject: Landscape ecology
subject: Geographic information systems

description: Bibliography: p. 130-145
Chaos, decoherence and quantum cosmology
Creators: name: Calzetta, Esteban
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this topical review we discuss the connections between chaos, decoherence and quantum cosmology. We understand chaos as classical chaos in systems with a finite number of degrees of freedom, decoherence as environment induced decoherence and quantum cosmology as the theory of the Wheeler - DeWitt equation or else the consistent history formulation thereof, first in mini super spaces and later through its extension to midi super spaces. The overall conclusion is that consideration of decoherence is necessary (and probably sufficient) to sustain an interpretation of quantum cosmology based on the Wave function of the Universe adopting a Wentzel - Kramers - Brillouin form for large Universes, but a definitive account of the semiclassical transition in classically chaotic cosmological models is not available in the literature yet.
description: 40 pages
Loophole-free Bell test based on local precertification of photon's presence
Creators: name: Cabello, Adan
name: Sciarrino, Fabio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A loophole-free violation of Bell inequalities is of fundamental importance for demonstrating quantum nonlocality and long-distance device-independent secure communication. However, transmission losses represent a fundamental limitation for photonic loophole-free Bell tests. A local precertification of the presence of the photons immediately before the local measurements may solve this problem. We show that local precertification is feasible by integrating three current technologies: (i) enhanced single-photon down-conversion to locally create a flag photon, (ii) nanowire-based superconducting single-photon detectors for a fast flag detection, and (iii) superconducting transition-edge sensors to close the detection loophole. We carry out a precise space-time analysis of the proposed scheme, showing its viability and feasibility.
description: REVTeX4, 7 Pages, 1 figure
NGC 6778: a disrupted planetary nebula around a binary central star
Creators: name: Guerrero, M. A.
name: Miranda, L. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The planetary nebula (PN) NGC 6778 harbors a binary central star with a short orbital period and displays two systems of fast collimated outflows. In order to assess the influence of the evolution through a common-envelope phase of the binary system of NGC 6778 on its formation and shaping, we have used narrow-band images and high-dispersion long-slit spectra of the nebula to investigate its detailed morphology and kinematics. We find that the overall structure of NGC 6778 can be described as a bipolar PN. The equatorial ring is highly disrupted and many radial features (filamentary wisps and cometary knots) also evidence strong dynamical effects. There are clear connections between the bipolar lobes and the fast collimated outflows: the collimated outflows seem to arise from bright knots at the tips of the bipolar lobes, whereas the kinematics of the bipolar lobes is distorted. We suggest that the interaction of the fast collimated outflows of NGC 6778 with its nebular envelope has resulted in the disruption of the nebular shell and equatorial ring.
description: Accepted for publication in A&A; 10 pages, 8 figures
Some Corrections to the Specialist Report on 'The Milling Stones', in Miket, R. (1983) The Roman Fort at South Shields: Excavations of the Defences 1977 - 1981. 143 - 146 (Tyne and Wear)
Creators: name: T Welfare, A
Publisher: name: Archaeology Data Service
Year: 2022

description: Northern Archaeology, 04.1, 45-51
The politics of contested space: military property development in Calgary, 1907-1938
Creators: name: Lackenbauer, Paul Whitney
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: HT169 .C32 C372 1999
subject: Additional Copy: HT169 .C32 C372 1999B located on 7LT and an additional copy in the library, Alberta Museum of the Regiments
subject: City planning--Alberta--Calgary--history
subject: Military bases--Alberta--Calgary--history
subject: Calgary (Alberta)--history

description: Bibliography: p. 136-145
An examination of trainee reactions to the use of technology in Canadian naval occupation training
Creators: name: Legassie, Regan Lloyd
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: U442 .T5 L44 1999
subject: Additional copy: 307 EDC 1999 LEG in the Doucette Education Library
subject: Military education - Canada
subject: Canada--armed forces--officials and employees--effect of technological innovations on.
subject: Canada--armed forces--officials and employees--attitudes

description: Bibliography: p. 80-85
Do Bars Trigger Activity in Galactic Nuclei?
Creators: name: Lee, Gwang-Ho
name: Woo, Jong-Hak
name: Lee, Myung Gyoon
name: Hwang, Ho Seong
name: Lee, Jong Chul
name: Sohn, Jubee
name: Lee, Jong Hwan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the connection between the presence of bars and AGN activity, using a volume-limited sample of $\sim$9,000 late-type galaxies with axis ratio $b/a>0.6$ and $M_{r} < -19.5+5{\rm log}h$ at low redshift ($0.02\le z\lesssim 0.055$), selected from Sloan Digital Sky Survey Data Release 7. We find that the bar fraction in AGN-host galaxies (42.6%) is $\sim$2.5 times higher than in non-AGN galaxies (15.6%), and that the AGN fraction is a factor of two higher in strong-barred galaxies (34.5%) than in non-barred galaxies (15.0%). However, these trends are simply caused by the fact that AGN-host galaxies are on average more massive and redder than non-AGN galaxies because the fraction of strong-barred galaxies ($\bfrsbo$) increases with $u-r$ color and stellar velocity dispersion. When $u-r$ color and velocity dispersion (or stellar mass) are fixed, both the excess of $\bfrsbo$ in AGN-host galaxies and the enhanced AGN fraction in strong-barred galaxies disappears. Among AGN-host galaxies we find no strong difference of the Eddington ratio distributions between barred and non-barred systems. These results indicate that AGN activity is not dominated by the presence of bars, and that AGN power is not enhanced by bars. In conclusion we do not find a clear evidence that bars trigger AGN activity.
description: 13 pages, 11 figures, accepted for publication in ApJ
Graph Embedding Techniques - Matrix Factorization to Deep Learning
Creators: name: Erickson, Parker
Publisher: name: Zenodo
Year: 2023

description: Graph embeddings can be used for a variety of applications, including recommendation, fraud detection, and other machine learning tasks. In this work, we aim to walk through various different embedding techniques, starting with spectral approaches, moving towards graph neural networks, and finally newer, inductive techniques such as NodePiece. Using a variety of use cases, we will discuss the pros and cons of each technique and examine future directions for the field of graph embedding research from the lens of industry.
Even more spectra: tensor triangular comparison maps via graded commutative 2-rings
Creators: name: Dell'Ambrogio, Ivo
name: Stevenson, Greg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Category Theory (math.CT)
subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13A02, 13D09, 18E30

description: We initiate the theory of graded commutative 2-rings, a categorification of graded commutative rings. The goal is to provide a systematic generalization of Paul Balmer's comparison maps between the spectrum of tensor-triangulated categories and the Zariski spectra of their central rings. By applying our constructions, we compute the spectrum of the derived category of perfect complexes over any graded commutative ring, and we associate to every scheme with an ample family of line bundles an embedding into the spectrum of an associated graded commutative 2-ring.
description: 34 pages, comments welcome
Habitat classification in the Kootenay Mountain region of British Columbia: A comparison of remote sensing methods
Creators: name: Dickson, Elizabeth Elaine
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: GF91 .C3 D53 2000
subject: Habitat (ecology)--British Columbia--Kootenay region--classification
subject: Landscape assessment--British Columbia--Kootenay region
subject: Remote sensing

description: Bibliography: p. 118-125
Jet quenching via jet collimation
Creators: name: Casalderrey-Solana, J.
name: Milhano, J. G.
name: Wiedemann, U.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The strong modifications of dijet properties in heavy ion collisions measured by ATLAS and CMS provide important constraints on the dynamical mechanisms underlying jet quenching. In this work, we show that the transport of soft gluons away from the jet cone - jet collimation - can account for the observed dijet asymmetry with values of $\hat{q}\, L$ that lie in the expected order of magnitude. Further, we show that the energy loss attained through this mechanism results in a very mild distortion of the azimuthal angle dijet distribution.
description: 4 pages, 2 figures; Proceedings of the "Quark Matter 2011" conference
Synthesis and reactivity of novel bis-(pentafluorophenyl)borylated ferrocenes
Creators: name: Carpenter, Bryon E.
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: QD412 .F4 C37 1999
subject: Ferrocene
subject: Organometallic chemistry
subject: Boranes

description: Bibliography: p. 100-104
Statistical properties of spontaneous emission near a rough surface
Creators: name: Biehs, Svend-Age
name: Greffet, Jean-Jacques
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the lifetime of the excited state of an atom or molecule near a plane surface with a given random surface roughness. In particular, we discuss the impact of the scattering of surface modes within the rough surface. Our study is completed by considering the lateral correlation length of the decay rate and the variance discussing its relation to the C0 correlation.
A New Full Adder Cell for Molecular Electronics
Creators: name: Ghasemi, Mehdi
name: Moaiyeri, Mohammad Hossein
name: Navi, Keivan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: Due to high power consumption and difficulties with minimizing the CMOS transistor size, molecular electronics has been introduced as an emerging technology. Further, there have been noticeable advances in fabrication of molecular wires and switches and also molecular diodes can be used for designing different logic circuits. Considering this novel technology, we use molecules as the active components of the circuit, for transporting electric charge. In this paper, a full adder cell based on molecular electronics is presented. This full adder is consisted of resonant tunneling diodes and transistors which are implemented via molecular electronics. The area occupied by this kind of full adder would be much times smaller than the conventional designs and it can be used as the building block of more complex molecular arithmetic circuits.
description: 13 pages, 14 figures
Explaining AI - Hidden Neuron Activations using Background Knowledge
Creators: name: Abhilekha Dalal
Publisher: name: Zenodo
Year: 2023

description: One of the current key challenges in Explainable AI is in correctly interpreting activations of hidden neurons. It seems evident that accurate interpretations thereof would provide insights into the question what a deep earning system has internally detected as relevant on the input, thus lifting some of the black box character of deep learning systems.
 The state of the art on this front indicates that hidden node activations appear to be interpretable in a way that makes sense to humans, at least in some cases. Yet, systematic automated methods that would be able to first hypothesize an interpretation of hidden neuron activations, and then verify it, are mostly missing.
 We provide such a method and demonstrate that it provides meaningful interpretations. It is based on using large-scale background knowledge – a class hierarchy of approx. 2 million classes curated from the Wikipedia Concept Hierarchy – together with a symbolic reasoning approach called concept induction based on description logics that was originally developed for applications in the Semantic Web field. Our results show that we can automatically attach meaningful labels from the background knowledge to individual neurons in the dense layer of a Convolutional Neural Network through a hypothesis and verification process.
Diffuse radio emission in MACS J1752.0+4440
Creators: name: van Weeren, R. J.
name: Bonafede, A.
name: Ebeling, H.
name: Edge, A. C.
name: Bruggen, M.
name: Giovannini, G.
name: Hoeft, M.
name: Rottgering, H. J. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the discovery of large-scale diffuse radio emission in the galaxy cluster MACS J1752.0+4440 (z=0.366). Using Westerbork Synthesis Radio Telescope (WSRT) observations we find that the cluster hosts a double radio relic system as well as a 1.65 Mpc radio halo covering the region between the two relics. The relics are diametrically located on opposite sides of the cluster center. The NE and SW relics have sizes of 1.3 and 0.9 Mpc, respectively. In case of an isolated binary merger event, the relative sizes of the relics suggest a mass ratio about 2:1. We measure integrated spectra of -1.16 \pm 0.03 for the NE and -1.10 \pm 0.05 for the SW relic. We conclude that this cluster has undergone a violent binary merger event and the relics are best explained by particles (re)accelerated in outwards traveling shock waves. The spectral indices suggest the relics trace shock waves with Mach numbers (M) of around 3.5 to 4.5. These relatively high Mach numbers derived from the radio spectral index are comparable to those derived for a few other recently discovered relics. This implies that merger shocks with M > 3 are relatively common in cluster outskirts if our understanding of diffusive shock acceleration is correct.
description: 6 pages, 3 figures, accepted for publication in MNRAS
Measuring space-time variation of the fundamental constants with redshifted submillimetre transitions of neutral carbon
Creators: name: Curran, S. J.
name: Tanna, A.
name: Koch, F. E.
name: Berengut, J. C.
name: Webb, J. K.
name: Stark, A. A.
name: Flambaum, V. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We compare the redshifts of neutral carbon and carbon monoxide in the redshifted sources in which the fine structure transition of neutral carbon, [CI], has been detected, in order to measure space-time variation of the fundamental constants. Comparison with the CO rotational lines measures gives the same combination of constants obtained from the comparison fine structure line of singly ionised carbon, [CII]. However, neutral carbon has the distinct advantage that it may be spatially coincident with the carbon monoxide, whereas [CII] could be located in the diffuse medium between molecular clouds, and so any comparison with CO could be dominated by intrinsic velocity differences. Using [CI], we obtain a mean variation of dF/F = (-3.6 +/- 8.5) x 10^-5, over z = 2.3 - 4.1, for the eight [CI] systems, which degrades to (-1.5+/- 11) x 10^-5, over z = 2.3 - 6.4 when the two [CII] systems are included. That is, zero variation over look-back times of 10.8-12.8 Gyr. However, the latest optical results indicate a spatial variation in alpha, which describes a dipole and we see the same direction in dF/F. This trend is, however, due to a single source for which the [CI] spectrum is of poor quality. This also applies to one of the two [CII] spectra previously used to find a zero variation in alpha^2/mu. Quantifying this, we find an anti-correlation between |dF/F| and the quality of the carbon detection, as measured by the spectral resolution, indicating that the typical values of >50 km/s, used to obtain a detection, are too coarse to reliably measure changes in the constants. From the fluxes of the known z > 1 CO systems, we predict that current instruments are incapable of the sensitivities required to measure changes in the constants through the comparison of CO and carbon lines. We therefore discuss in detail the use of ALMA for such an undertaking ... ABRIDGED
description: Accepted for publication in Section 3 - Cosmology (including clusters of galaxies) of Astronomy and Astrophysics
Embodying movement from dissection to dissolution
Creators: name: Adamcik, Ingrid Alexandra
Publisher: name: Environmental Design
Year: 1998
Subjects: subject: NA9053 .R4 A33 1998
subject: Architecture and recreation
subject: Dance
subject: Architectural design
subject: Movement, Aesthetics of
subject: Building sites - Alberta - Calgary - Planning
subject: Calgary (Alta.)

description: Bibliography: p. 46-47
Duality of holomorphic functions spaces und smoothing properties of the Bergman projection
Creators: name: Herbig, Anne-Katrin
name: McNeal, Jeffery D.
name: Straube, Emil J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32A36, 32A25, 32C37

description: Let $Ω\subset\mathbb{C}^n$ be a bounded domain with smooth boundary, whose Bergman projection $B$ maps the Sobolev space $H^{k_{1}}(Ω)$ (continuously) into $H^{k_{2}}(Ω)$. We establish two smoothing results: (i) the full Sobolev norm $\|Bf\|_{k_{2}}$ is controlled by $L^2$ derivatives of $f$ taken along a single, distinguished direction (of order $\leq k_{1}$), and (ii) the projection of a conjugate holomorphic function in $L^{2}(Ω)$ is automatically in $H^{k_{2}}(Ω)$. There are obvious corollaries for when $B$ is globally regular.
Morphology and rheology of binary blends of polpropylene and linear low density polyethylene
Creators: name: Singh, Priti
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: TP 1180 P68 S59 2000
subject: Polypropylene
subject: Polyethylene
subject: Acetal resins
subject: Rheology

description: Bibliography: p. 94-104
KNOWLEDGE GRAPHS FOR CONTEXTUAL AI
Creators: name: NATARAJAN, MAYA
Publisher: name: Zenodo
Year: 2023

description: Companies are increasingly using artificial intelligence (AI) applications for decision-making today. However, due to lack of context, AI systems have not yet achieved their full potential as reliable solutions for complex problems. Enter knowledge graphs – the modern way to capture relationships and convey their meaning. Knowledge graphs drive intelligence into the data itself and give AI the context to be more explainable, accurate, and repeatable.
Deflections of concrete members reinforced with fibre reinforced polymer (FRP) bars
Creators: name: Hall, Tara Stephanie
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: TA 445 H35 2000
subject: Reinforced concrete
subject: Reinforced concrete, Fiber
subject: Reinforcing bars
subject: Concrete - Testing

description: Bibliography: p. 285-293
The past, present and future of Galactic planetary nebula surveys
Creators: name: Parker, Quentin A.
name: Frew, D. J.
name: Acker, A.
name: Miszalski, B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Over the last decade Galactic planetary nebula discoveries have entered a golden age due to the emergence of high sensitivity, high resolution narrow-band surveys of the Galactic plane. These have been coupled with access to complimentary, deep, multi-wavelength surveys across near-IR, mid-IR and radio regimes in particular from both ground-based and space-based telescopes. These have provided powerful diagnostic and discovery capabilities. In this review these advances are put in the context of what has gone before, what we are uncovering now and through the window of opportunity that awaits in the future. The astrophysical potential of this brief but key phase of late stage stellar evolution is finally being realised.
description: 8 pages, 3 figures. To be published in Planetary Nebulae: an Eye to the Future, Proceedings of IAU Symposium 283, held in Puerto de la Cruz, Tenerife, Spain, July 25-29 2011
Some Open Problems in Topological Algebra
Creators: name: Banakh, Taras
name: Choban, Mitrofan
name: Guran, Igor
name: Protasov, Igor
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics

description: This is the list of open problems in topological algebra posed on the conference dedicated to the 20th anniversary of the Chair of Algebra and Topology of Lviv National University, that was held on 28 September 2001.
description: 4 pages
Characterization of the potassium channel isoforms in mouse ventricle by ribonuclease protection assay: Developmental changes and effect of thyroid hormone on mRNA expression levels
Creators: name: Janzen, Kathryn
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: QP 535 K1 J36 1999
subject: Potassium channels
subject: Ion channels
subject: Thyroid hormones
subject: Messenger RNA
subject: Mice - Cardiovascular system
subject: Heart - Physiology

description: Bibliography: p. 125-140
Characterization of three yeast homologs of the putative human tumor suppressor p33 (ING1)
Creators: name: Loewith, Robbie Joseph
Publisher: name: University of Calgary
Year: 2000
Subjects: subject: QH450.2 .L64 2000
subject: Genetic transcription - Regulation
subject: Cancer - Genetic aspects
subject: DNA-protein interactions
subject: RNA-protein interactions

description: Bibliography: p. 82-98.
Propagation of gamma rays and production of free electrons in air
Creators: name: Dimant, Y. S.
name: Nusinovich, G. S.
name: Sprangle, P.
name: Penano, J.
name: Romero-Talamas, C. A.
name: Granatstein, V. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A new concept of remote detection of concealed radioactive materials has been recently proposed \cite{Gr.Nusin.2010}-\cite{NusinSprangle}. It is based on the breakdown in air at the focal point of a high-power beam of electromagnetic waves produced by a THz gyrotron. To initiate the avalanche breakdown, seed free electrons should be present in this focal region during the electromagnetic pulse. This paper is devoted to the analysis of production of free electrons by gamma rays leaking from radioactive materials. Within a hundred meters from the radiation source, the fluctuating free electrons appear with the rate that may exceed significantly the natural background ionization rate. During the gyrotron pulse of about 10 microsecond length, such electrons may seed the electric breakdown and create sufficiently dense plasma at the focal region to be detected as an unambiguous effect of the concealed radioactive material.
description: 27 pages, 10 figures
"Multi" Model: An Ontology For Every DB on the Truck
Creators: name: Havey, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: Amazon Neptune, RDF, ontology, mesh, data-mesh, UML, data model, graph, knowledge graph, SPARQL, multimodel, multi-model, multi-modal, polyglot

description: A multi-model database allows multiple data representations to coexist in the same instance. In simpler times, that meant two models — such as document and graph — in one. In this presentation, I tackle the multi-model dream of tomorrow: a single model with data spanning many and various database services: key-value, document, relational, lake, in-memory, search service, graph, and more. Cloud providers have all these services on the truck, and it's never been easier to get them all up and running. There's just one complication: drawing the model! Graph to the rescue! I show, using the example of movies, a straightforward ontological approach to model the structure of data spanning database services across "the truck."
Flanged and Socketed Axes, Rothbury. A Note upon a Short Flanged Axe from the neighbourhood of Rothbury, Northumberland, and upon a Socketed Axe of Type Yorkshire from Warton, Thropton, Northumberland
Creators: name: T Welfare, A
Publisher: name: Archaeology Data Service
Year: 2022

description: Northern Archaeology, 03, 53-58
Photometric Properties of Void Galaxies in the Sloan Digital Sky Survey DR7 Data Release
Creators: name: Hoyle, Fiona
name: Vogeley, Michael S.
name: Pan, Danny
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the sample presented in Pan:2011, we analyse the photometric properties of 88,794 void galaxies and compare them to galaxies in higher density environments with the same absolute magnitude distribution. In Pan et al. (2011), we found a total of 1054 dynamically distinct voids in the SDSS with radius larger than 10h^-1 Mpc. The voids are underdense, with delta rho/rho < -0.9 in their centers. Here we study the photometric properties of these void galaxies. We look at the u - r colours as an indication of star formation activity and the inverse concentration index as an indication of galaxy type. We find that void galaxies are statistically bluer than galaxies found in higher density environments with the same magnitude distribution. We examine the colours of the galaxies as a function of magnitude, and we fit each colour distribution with a double-Gaussian model for the red and blue subpopulations. As we move from bright to dwarf galaxies, the population of red galaxies steadily decreases and the fraction of blue galaxies increases in both voids and walls, however the fraction of blue galaxies in the voids is always higher and bluer than in the walls. We also split the void and wall galaxies into samples depending on galaxy type. We find that late type void galaxies are bluer than late type wall galaxies and the same holds for early galaxies. We also find that early type, dwarf void galaxies are blue in colour. We also study the properties of void galaxies as a function of their distance from the center of the void. We find very little variation in the properties, such as magnitude, colour and type, of void galaxies as a function of their location in the void. The only exception is that the dwarf void galaxies may live closer to the center. The centers of voids have very similar density contrast and hence all void galaxies live in very similar density environments (ABRIDGED)
description: 10 pages, 25 figures