cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
JWST-TST Proper Motions: I. High-Precision NIRISS Calibration and Large Magellanic Cloud Kinematics
Creators: name: Libralato, M.
name: Bellini, A.
name: van der Marel, R. P.
name: Anderson, J.
name: Sohn, S. T.
name: Watkins, L. L.
name: Alderson, L.
name: Allen, N.
name: Clampin, M.
name: Glidden, A.
name: Goyal, J.
name: Hoch, K.
name: Huang, J.
name: Kammerer, J.
name: Lewis, N. K.
name: Lin, Z.
name: Long, D.
name: Louie, D.
name: MacDonald, R. J.
name: Mountain, M.
name: Peña-Guerrero, M.
name: Perrin, M. D.
name: Pueyo, L.
name: Rebollido, I.
name: Rickman, E.
name: Seager, S.
name: Stevenson, K. B.
name: Valenti, J. A.
name: Valentine, D.
name: Wakeford, H. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We develop and disseminate effective point-spread functions and geometric-distortion solutions for high-precision astrometry and photometry with the JWST NIRISS instrument. We correct field dependencies and detector effects, and assess the quality and the temporal stability of the calibrations. As a scientific application and validation, we study the proper motion (PM) kinematics of stars in the JWST calibration field near the Large Magellanic Cloud (LMC) center, comparing to a first-epoch Hubble Space Telescope (HST) archival catalog with a 16-yr baseline. For stars with G~20, the median PM uncertainty is ~13 $μ$as yr$^{-1}$ (3.1 km s$^{-1}$), better than Gaia DR3 typically achieves for its very best-measured stars. We kinematically detect the known star cluster OGLE-CL LMC 407, measure its absolute PM for the first time, and show how this differs from other LMC populations. The inferred cluster dispersion sets an upper limit of 24 $μ$as yr$^{-1}$ (5.6 km s$^{-1}$) on systematic uncertainties. Red-giant-branch stars have a velocity dispersion of 33.8 $\pm$ 0.6 km s$^{-1}$, while younger blue populations have a narrower velocity distribution, but with a significant kinematical substructure. We discuss how this relates to the larger velocity dispersions inferred from Gaia DR3. These results establish JWST as capable of state-of-the-art astrometry, building on the extensive legacy of HST. This is the first paper in a series by our JWST Telescope Scientist Team (TST), in which we will use Guaranteed Time Observations to study the PM kinematics of various stellar systems in the Local Group.
description: 28 pages, 25 figures, 2 tables. Accepted for publication in ApJ. The effective point-spread-function models, the geometric-distortion solutions and a preliminary version of the code are available at the links provided in the manuscript
Continuum reverberation mapping in a z = 1.41 radio-loud quasar
Creators: name: Goicoechea, L. J.
name: Shalyapin, V. N.
name: Gil-Merino, R.
name: Braga, V. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Q0957+561 was the first discovered gravitationally lensed quasar. The mirage shows two images of a radio-loud quasar at redshift z = 1.41. The time lag between these two images is well established around one year. We detected a very prominent variation in the optical brightness of Q0957+561A at the beginning of 2009, which allowed us to predict the presence of significant intrinsic variations in multi-wavelength light curves of Q0957+561B over the first semester of 2010. To study the predicted brightness fluctuations of Q0957+561B, we conducted an X-ray, NUV, optical and NIR monitoring campaign using both ground-based and space-based facilities. The continuum NUV-optical light curves revealed evidence of a centrally irradiated, standard accretion disk. In this paper, we focus on the radial structure of the standard accretion disk and the nature of the central irradiating source in the distant radio-loud active galactic nucleus (AGN).
description: 6 pages, 5 figures, Proceedings of The Central Kiloparsec in Galactic Nuclei-AHAR2011 Conference, to appear in Journal of Physics: Conference Series (2012)
New chondritic bodies identified in eight oxygen-bearing white dwarfs
Creators: name: Doyle, Alexandra E.
name: Klein, Beth L.
name: Dufour, Patrick
name: Melis, Carl
name: Zuckerman, B.
name: Xu, Siyi
name: Weinberger, Alycia J.
name: Trierweiler, Isabella L.
name: Monson, Nathaniel N.
name: Jura, Michael A.
name: Young, Edward D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present observations and analyses of eight white dwarf stars that have accreted rocky material from their surrounding planetary systems. The spectra of these helium-atmosphere white dwarfs contain detectable optical lines of all four major rock-forming elements (O, Mg, Si, Fe). This work increases the sample of oxygen-bearing white dwarfs with parent body composition analyses by roughly thirty-three percent. To first order, the parent bodies that have been accreted by the eight white dwarfs are similar to those of chondritic meteorites in relative elemental abundances and oxidation states. Seventy-five percent of the white dwarfs in this study have observed oxygen excesses implying volatiles in the parent bodies with abundances similar to those of chondritic meteorites. Three white dwarfs have oxidation states that imply more reduced material than found in CI chondrites, indicating the possible detection of Mercury-like parent bodies, but are less constrained. These results contribute to the recurring conclusion that extrasolar rocky bodies closely resemble those in our solar system, and do not, as a whole, yield unusual or unique compositions.
description: Accepted for publication in ApJ. 7 Figures, 7 Tables
Patterns for Business-to-consumer E-Commerce Applications
Creators: name: Yuan, Xiaohong
name: Fernandez, Eduardo B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: E-commerce is one of the most important web applications. We present here a set of patterns that describe shopping carts, products, catalogue, customer accounts, shipping, and invoices. We combine them in the form of composite patterns, which in turn make up a domain model for business-to-consumer e-commerce. We also indicate how to add security constraints to this model. This domain model can be used as a computation-independent model from which specific applications can be produced using a model-driven architecture approach.
description: 20 pages, 17 figures
Quantum mean estimation for lattice field theory
Creators: name: Gustafson, Erik J.
name: Lamm, Henry
name: Unmuth-Yockey, Judah
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate the quantum mean estimation algorithm on Euclidean lattice field theories. This shows a quadratic advantage over Monte Carlo methods which persists even in presence of a sign problem, and is insensitive to critical slowing down. The algorithm is used to compute $π$ with and without a sign problem, a toy U(1) gauge theory model, and the Ising model. The effect of $R_{Z}$-gate synthesis errors on a future fault-tolerant quantum computer is investigated.
description: 14 pages, 18 figures
Practical considerations for post-silicon debug using backspace
Creators: name: Gort, Marcel
Publisher: name: University of British Columbia
Year: 2009

description: With the ever-increasing complexity of integrated circuits, the elimination of all design errors before fabrication is becoming more difficult. This increases the need to find design errors in chips after fabrication. This task, termed post-silicon debug, can be made easier if it is possible to obtain a trace of states that leads to a known state. BackSpace, a proposal for a new debug infrastructure which provides such a trace has been recently presented. BackSpace combines formal analysis with on-chip instrumentation. In this thesis, we show that BackSpace can be made practical by modifying the architecture and debug flow to address the area overhead, and also by addressing on-chip realities such as non-determinism and signal propagation delay. Additionally, this thesis describes a proof-of-concept implementation of a complex processor instrumented with the debug architecture and shows that BackSpace can produce traces hundreds of cycles long. Our results indicate that the area overhead of the breakpoint circuit, a main component of the debug architecture, can be reduced to 5% for our prototype, while still allowing the debug flow to create state-accurate traces.
The Effect of vasopressin on salt excretion in the homozygous Brattleboro rat
Creators: name: Cupples, William Angus
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: QL 737 R6 C84 1977
subject: Vasopressin
subject: Salt in the body
subject: Rats - Physiology
subject: Brattleboro rat

description: Bibliography: p. 114-132.
Avian influenza virus A (H5N1), detected through routine surveillance, in child, Bangladesh
Creators: name: Goswami, D.
name: Butler, E.
name: Alamgir, A.S.M.
name: Nahar, S.
name: Brooks, W.A.
name: Fry, A.
name: Zaman, R.U.
name: Luby, S.P.
name: Davis, C.T.
name: Nahar, K.
name: Lindstrom, S.
name: Rahman, M.
name: Uyeki, T.M.
name: Donis, R.O.
name: Hancock, K.
name: Islam, M.S.
name: Sultana, R.
name: Rahman, M.
name: Shu, B.
name: Haider, M.S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: We identified avian influenza virus A (H5N1) infection in a child in Bangladesh in 2008 by routine influenza surveillance. The virus was of the same clade and phylogenetic subgroup as that circulating among poultry during the period. This case illustrates the value of routine surveillance for detection of novel influenza virus.
Positive Influences of Youth Volunteering in Greening Activities on Youth Development and the Community
Creators: name: Blasdell, Danielle
Publisher: name: My University
Year: 2020
Subjects: subject: youth engagement
subject: greening activities
subject: Community engagement
subject: volunteer
subject: Public Health
subject: Urban Planning

description: Background: During this applied public health project, greening activities performed by the Clean & Green program within the city of Flint, Michigan were examined to determine the influence of the engagement of youth volunteers in greening activities on positive youth and community change. Methods: The Adult Leader Interview was developed by the Michigan Youth Violence Prevention Center (MI-YVPC) as a tool to measure qualitative data. The qualitative data in this research is characterized and interpreted from the interviewee responses who were contacted via phone, email, or text message to set up an in-person interview. The Adult Leader Interview included 15 questions specific to developing a better understanding of how the Clean & Green groups interact and engage the youth in greening activities around the Flint community as well as any positive influence of the engagement. The interview information was analyzed using a qualitative approach through grounded theory. Results: The 15 question Adult Leader Interview constructed by the Michigan Youth Violence Prevention Center was administrated among seven Clean & Greens groups. Interviewees stated that the greening volunteer activities helped build confidence, develop work ethic, build pride, and cultivate leadership among youth. Positive community change was also noted through the involvement of youth in their own neighborhood rather than use of professional services. Conclusion: The sample size of seven Clean & Green groups imposed limitations on the amount of qualitative data obtained. Although the project faced data limitations due to the small sample size, the data that were successfully collected from the completed interviews contributed to our understanding of the positive influences youth engagement in greening activities.
Dynamics of the solar magnetic bright points derived from their horizontal motions
Creators: name: Chitta, LP.
name: van Ballegooijen, A. A.
name: van der Voort, L. Rouppe
name: DeLuca, E. E.
name: Kariyappa, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The sub-arcsec bright points (BP) associated with the small scale magnetic fields in the lower solar atmosphere are advected by the evolution of the photospheric granules. We measure various quantities related to the horizontal motions of the BPs observed in two wavelengths, including the velocity auto-correlation function. A 1 hr time sequence of wideband H$α$ observations conducted at the \textit{Swedish 1-m Solar Telescope} (\textit{SST}), and a 4 hr \textit{Hinode} \textit{G}-band time sequence observed with the Solar Optical telescope are used in this work. We follow 97 \textit{SST} and 212 \textit{Hinode} BPs with 3800 and 1950 individual velocity measurements respectively. For its high cadence of 5 s as compared to 30 s for \textit{Hinode} data, we emphasize more on the results from \textit{SST} data. The BP positional uncertainty achieved by \textit{SST} is as low as 3 km. The position errors contribute 0.75 km$^2$ s$^{-2}$ to the variance of the observed velocities. The \textit{raw} and \textit{corrected} velocity measurements in both directions, i.e., $(v_x,v_y)$, have Gaussian distributions with standard deviations of $(1.32,1.22)$ and $(1.00, 0.86)$ km s$^{-1}$ respectively. The BP motions have correlation times of about $22 - 30$ s. We construct the power spectrum of the horizontal motions as a function of frequency, a quantity that is useful and relevant to the studies of generation of Alfvén waves. Photospheric turbulent diffusion at time scales less than 200 s is found to satisfy a power law with an index of 1.59.
description: Accepted for publication in The Astrophysical Journal. 24 pages, 9 figures, and 1 movie (not included)
Gaia colour-magnitude diagrams of young open clusters: Identification in the UBC catalogue and a comparison of manual and automated analysis
Creators: name: Negueruela, Ignacio
name: de Burgos, Abel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Automated analysis of Gaia astrometric data has led to the discovery of many new high-quality open cluster candidates. With a good determination of their parameters, these objects become excellent tools to investigate the properties of our Galaxy. We explore whether young open clusters can be readily identified from Gaia data alone by studying the properties of their Gaia colour-magnitude diagrams. We also want to compare the results of a traditional cluster analysis with those of automated methods. We selected three young open cluster candidates from the UBC catalogue, ranging from a well-populated object with a well-defined sequence to a poorly-populated, poorly-defined candidate. We obtained classification spectra for the brightest stars in each. We redetermined members based on EDR3 data and fitted isochrones to derive age, distance and reddening. All three candidates are real clusters with age below 100 Ma. UBC103 is a moderately populous cluster, with an age around 70 Ma. At a distance of $\sim$ 3 kpc, it forms a binary cluster with the nearby NGC6683. UBC114 is a relatively nearby ($\sim1.5$kpc) poorly-populated cluster containing two early-B stars. UBC587 is a dispersed, very young ($<$ 10 Ma) cluster located at $\sim3$ kpc, behind the Cygnus~X region, and may be a valuable tracer of the Orion arm. The OCfinder methodology for the identification of new open clusters is extremely successful, with even poor candidates resulting in interesting detections. The presence of an almost vertical photometric sequence in the Gaia colour-magnitude diagram is a safe way to identify young open clusters. Automated methods for the determination of cluster properties give approximate solutions, but are still subject to some difficulties. There is some evidence suggesting that artificial intelligence systems may systematically underestimate extinction, which may impact in the age determination.
description: Accepted for publication in A&A
Surrogate forward models for population inference on compact binary mergers
Creators: name: Riley, Jeff
name: Mandel, Ilya
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Rapidly growing catalogs of compact binary mergers from advanced gravitational-wave detectors allow us to explore the astrophysics of massive stellar binaries. Merger observations can constrain the uncertain parameters that describe the underlying processes in the evolution of stars and binary systems in population models. In this paper, we demonstrate that binary black hole populations - namely, detection rates, chirp masses, and redshifts - can be used to measure cosmological parameters describing the redshift-dependent star formation rate and metallicity distribution. We present a method that uses artificial neural networks to emulate binary population synthesis computer models, and construct a fast, flexible, parallelisable surrogate model that we use for inference.
description: 16 pages, 3 tables, 8 figures
A Glance into the Future of Human Computer Interactions
Creators: name: Farooq, Umer
name: Iqbal, M. Aqeel
name: Nazir, Sohail
Publisher: name: arXiv
Year: 2011
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Computers have a direct impact on our lives nowadays. Human's interaction with the computer has modified with the passage of time as improvement in technology occurred the better the human computer interaction became. Today we are facilitated by the operating system that has reduced all the complexity of hardware and we undergo our computation in a very convenient way irrespective of the process occurring at the hardware level. Though the human computer interaction has improved but it's not done yet. If we come to the future the computer's role in our lives would be a lot more rather our life would be of the artificial intelligence. In our future the biggest resource would be component of time and wasting time for a key board entry or a mouse input would be unbearable so the need would be of the computer interaction environment that along with the complexity reduction also minimizes the time wastage in the human computer interaction. Accordingly in our future the computation would also be increased it would not be a simple operating system limited to a computer it would be computers managing our entire life activities hence fall out of domain of present computers electronic based architecture .In this research paper we propose a model that shall be meeting the future human computer interaction needs possessing linguistic human computer interference environment based on surface technology, automation and photonic computing, which would be reliable, efficient and quicker satisfying all the future artificial intelligence pre requisites.
description: 16 Pages 7 Figures International Journal
Study of some low-grade regional metamorphic rocks from the Omineca Crystalline Belt, British Columbia
Creators: name: Jones, Jonathan W.
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: QE 475 J643 1972
subject: Rocks, Metamorphic
subject: Rocks, Crystalline
subject: Petrology - British Columbia

description: Bibliography: p. 82-88.
Toward minimal composite Higgs models from regular geometries in bottom-up holography
Creators: name: Elander, Daniel
name: Fatemiabhari, Ali
name: Piai, Maurizio
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a bottom-up, holographic description of a field theory yielding the spontaneous breaking of an approximate SO(5) global symmetry to its SO(4) subgroup. The weakly-coupled, six-dimensional gravity dual has regular geometry. One of the dimensions is compactified on a circle that shrinks smoothly to zero size at a finite value of the holographic direction, hence introducing a physical scale in a way that mimics the effect of confinement in the dual four-dimensional field theory. We study the spectrum of small fluctuations of the bulk fields carrying SO(5) quantum numbers, which can be interpreted as spin-0 and spin-1 bound states in the dual field theory. This work supplements an earlier publication, focused only on the SO(5) singlet states. We explore the parameter space of the theory, paying particular attention to composite states that have the right quantum numbers to be identified as pseudo-Nambu-Goldstone Bosons (PNGBs). We find that in this model the PNGBs are generally heavy, with masses of the same order as other bound states, indicating the presence of a sizeable amount of explicit symmetry breaking in the field theory side. But we also find a qualitatively new, unexpected result. When the dimension of the field-theory operator inducing SO(5) breaking is close to half of the space-time dimensionality, there exists a region of parameter space in which the PNGBs and the lightest scalar are both parametrically light in comparison to all other bound states of the field theory. Although this region is known to yield metastable classical backgrounds, this finding might be relevant to model building in the composite Higgs context.
description: 26 pages, 6 figures; Version accepted for publication
Size-dependent lattice symmetry breaking determines the exciton fine structure of perovskite nanocrystals
Creators: name: Weinberg, Daniel
name: Park, Yoonjae
name: Limmer, David T.
name: Rabani, Eran
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The ordering of optically bright and dark excitonic states in lead-halide perovskite nanocrystals has been a matter of some debate. It has been proposed that the unusually short radiative lifetimes in these materials is due to an optically bright excitonic ground state, a unique situation among all nanomaterials. This proposal was based on the influence of the Rashba effect driven by lattice-induced inversion symmetry breaking. Direct measurement of the excitonic emission under magnetic fields has shown the signature of a dark ground state, bringing the role of the Rashba effect into question. Here, we use a fully atomistic theory to model the exciton fine structure of perovskite nanocrystals accounting for the realistic lattice distortion at the nanoscale. We calculate optical gaps and exciton fine structure that compare favorably with a wide range of experimental works. We find a non-monotonic dependence of the exciton fine structure splittings due to a size dependence structural transition between cubic and orthorhombic phases. In addition, the excitonic ground state is found to be dark with nearly pure spin triplet character resulting from a small Rashba coupling. We additionally explore the intertwined effects of lattice distortion and nanocrystal shape on the fine structure splittings, clarifying observations on poly-disperse nanocrystals.
description: 17 pages, 11 figures
Terrain analysis by airphoto interpretation
Creators: name: Balgowan, William L.
Publisher: name: University of Calgary
Year: 1973
Subjects: subject: TA 593 B35 1973 Microfilm
subject: Aerial photogrammetry
subject: Photographic surveying
subject: Geology - Alberta - Calgary
subject: Soil-surveys - Alberta - Calgary

description: Bibliography: p. 156-166.
Molecular dynamics simulation of the transformation of Fe-Co alloy by machine learning force field based on atomic cluster expansion
Creators: name: Li, Yongle
name: Xu, Feng
name: Hou, Long
name: Sun, Luchao
name: Su, Haijun
name: Li, Xi
name: Ren, Wei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The force field describing the calculated interaction between atoms or molecules is the key to the accuracy of many molecular dynamics (MD) simulation results. Compared with traditional or semi-empirical force fields, machine learning force fields have the advantages of faster speed and higher precision. We have employed the method of atomic cluster expansion (ACE) combined with first-principles density functional theory (DFT) calculations for machine learning, and successfully obtained the force field of the binary Fe-Co alloy. Molecular dynamics simulations of Fe-Co alloy carried out using this ACE force field predicted the correct phase transition range of Fe-Co alloy.
description: 17 pages, 6 figures
Embryology of the neurohypophysis of the rainbow trout, Salmo gairdneri
Creators: name: Robison, Barbara Anne
Publisher: name: University of Calgary
Year: 1971
Subjects: subject: QL 638 S2 R62 1970
subject: Rainbow trout
subject: Embryology - Fish
subject: Fishes - Physiology

description: Bibliography: p. 46-49.
Influence of lateral reinforcement and sealing on creep in reinforced concrete columns
Creators: name: Sporn, Jan Friedrich
Publisher: name: Engineering
Year: 1970
Subjects: subject: TA 683.5 C7 S68 1970 Microfilm
subject: Columns, Concrete
subject: Creep of concrete
subject: Reinforced concrete construction

description: Bibliography: p. 63-66.
Aesthetic Preferences of Human Movement: Does Experience with the Arts Matter?
Creators: name: Moffat, Ryssa
name: Casale, Courtney
name: Cross, Emily S.
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Cognitive Psychology
subject: Psychology
subject: FOS: Psychology
subject: Social and Behavioral Sciences
subject: expertise
subject: dance
subject: neuroaesthetics

description: This study will assess the impact of previous arts experience and sociocultural background on aesthetic perceptions of dance movements.
Deep Chandra Observations of NGC 5728: Morphology and Spectral Properties of the Extended X-ray Emission
Creators: name: Falcao, Anna Trindade
name: Fabbiano, G.
name: Elvis, M.
name: Paggi, A.
name: Maksym, W. P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent deep Chandra observations of nearby Compton thick (CT) AGN have produced surprising results, uncovering extended emission not only in the soft X-rays but in the hard emission (>3 keV), challenging the long-held belief that the characteristic hard X-ray continuum and fluorescent Fe Ka lines are associated with the torus in the standard picture of AGN. In this work, we present the analysis of our deep (~261 ks) X-ray Chandra ACIS-S observations of NGC 5728, a nearby (z=0.00932) CT AGN. We find that the diffuse emission is more extended at lower energies, in the bicone direction out to ~2 kpc radially, but also significantly extended in the direction of the cross-cone, out to ~1.4 kpc. Our results suggest that the ratio of detected photons in the cross-cone to the bicone region is ~16%, below 3 keV, decreasing to 5% for energies 3-6 keV. The nuclear spectrum suggests a low photoionization phase mixed with a more ionized gas component, while the bicone and cross-cone spectra are dominated by a mix of photoionization and shocked gas emission. A mixture of thermal and photoionization models to fit the spectra indicates the presence of complex gas interactions, consistent with previous observations of other CT AGN (e.g., ESO 428-G014).
Techniques of character presentation in the Lais of Marie de France
Creators: name: Glazer, Brenda Michelle
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: PQ 1494 L7 G5 1978 Microfiche
subject: Marie de France, 12th century. Lais
subject: Marie de France, 12th century - Characters

description: Bibliography: p. 93-96.
Reply to Comment by D. Spemann et al [EPL 98 (2012) 57006, arXiv:1204.2992]
Creators: name: Sepioni, M.
name: Nair, R. R.
name: Tsai, I. -Ling
name: Geim, A. K.
name: Grigorieva, I. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This article is a reply to the Comment by D. Spemann et al (arXiv:1204.2992) in response to our paper 'Revealing common artifacts due to ferromagnetic inclusions in highly oriented pyrolytic graphite' (EPL, 97 (2012) 47001).
description: Reply to arXiv:1204.2992 Comment by D. Spemann et al re arXiv:1201.6374 by Sepioni et al
New Observations of Solar Wind 1/f Turbulence Spectrum from Parker Solar Probe
Creators: name: Huang, Zesen
name: Sioulas, Nikos
name: Shi, Chen
name: Velli, Marco
name: Bowen, Trevor
name: Davis, Nooshin
name: Chandran, B. D. G.
name: Kang, Ning
name: Shi, Xiaofei
name: Huang, Jia
name: Bale, Stuart D.
name: Kasper, J. C.
name: Larson, Davin E.
name: Livi, Roberto
name: Whittlesey, P. L.
name: Rahmati, Ali
name: Paulson, Kristoff
name: Stevens, M.
name: Case, A. W.
name: de Wit, Thierry Dudok
name: Malaspina, David M.
name: Bonnell, J. W.
name: Goetz, Keith
name: Harvey, Peter R.
name: MacDowall, Robert J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The trace magnetic power spectrum in the solar wind is known to be characterized by a double power law at scales much larger than the proton gyro-radius, with flatter spectral exponents close to -1 found at the lower frequencies below an inertial range with indices closer to $[-1.5,-1.6]$. The origin of the $1/f$ range is still under debate. In this study, we selected 109 magnetically incompressible solar wind intervals ($δ|\boldsymbol B|/|\boldsymbol B| \ll 1$) from Parker Solar Probe encounters 1 to 13 which display such double power laws, with the aim of understanding the statistics and radial evolution of the low frequency power spectral exponents from Alfvén point up to 0.3 AU. New observations from closer to the sun show that in the low frequency range solar wind turbulence can display spectra much shallower than $1/f$, evolving asymptotically to $1/f$ as advection time increases, indicating a dynamic origin for the $1/f$ range formation. We discuss the implications of this result on the Matteini et al. (2018) conjecture for the $1/f$ origin as well as example spectra displaying a triple power law consistent with the model proposed by Chandran et al. (2018), supporting the dynamic role of parametric decay in the young solar wind. Our results provide new constraints on the origin of the $1/f$ spectrum and further show the possibility of the coexistence of multiple formation mechanisms.
description: Accepted by ApJL
B meson distribution amplitude from B --> γl ν
Creators: name: Beneke, M.
name: Rohrwild, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We reconsider the utility of the radiative decay $B \to γ\ell ν$ with an energetic photon in the final state for determining parameters of the $B$-meson light-cone distribution amplitude. Including $1/m_b$ power corrections and radiative corrections at next-to-leading logarithmic order, we perform an improved analysis of the existing BABAR data. We find a provisional lower limit on the inverse moment of the $B$ meson distribution amplitude, $λ_B$, which, due to the inclusion of radiative and power corrections, is significantly lower than the previous result. More data with large photon energy is, however, required to obtain reliable results, as should become available in the future from SuperB factories.
description: 15 pages, 5 figures
Quantum friction in the presence of a perfectly conducting plate
Creators: name: Guo, Xin
name: Milton, Kimball A.
name: Kennedy, Gerard
name: Pourtolami, Nima
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A neutral but polarizable particle at rest near a perfectly conducting plate feels a force normal to the surface of the plate, which tends to pull the particle towards the plate. This is the well-known Casimir-Polder force, which has long been theoretically proposed and experimentally observed. In this paper, we explore the transverse frictional force on an atom moving uniformly parallel to a perfectly conducting plate. Although many theoretical predictions can be found for the quantum friction on a particle moving above an imperfect surface, the extreme situation with a perfectly conducting plate seems to have been largely ignored by the theoretical community. We investigate this ideal case as a natural extension of our previous works on quantum vacuum friction (blackbody friction), and conclude that there does exist a quantum frictional force on an atom moving above a perfectly conducting plate. Very interestingly, the distance dependence, the temperature dependence and even the sign of the frictional force can depend on the polarization state of the atom. For an isotropic atom with a static polarizability, the resultant frictional force is found to be negative definite and therefore remains a true drag. Just above the surface of the plate, the magnitude of the frictional force is twice that of the quantum vacuum friction in the absence of the plate.
Technology and railroaders: an exploratory study into the effects of technological change upon railway road service employees
Creators: name: Argue, Robert Donald
Publisher: name: University of Calgary
Year: 1971
Subjects: subject: HD 8039 R12 C33 1971
subject: Railroads - Canada - Employees
subject: Railroads - Canada - Technological innovations
subject: Canadian Pacific Railway. Calgary Depot

description: Bibliography: p. 142-151.
Molecule survival in magnetized protostellar disk winds. I. Chemical model and first results
Creators: name: Panoglou, D.
name: Cabrit, S.
name: Forets, G. Pineau des
name: Garcia, P. J. V.
name: Ferreira, J.
name: Casse, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Molecular counterparts to atomic jets have been detected within 1000 AU of young stars. Reproducing them is a challenge for proposed ejection models. We explore whether molecules may survive in an MHD disk wind invoked to reproduce the kinematics and tentative rotation signatures of atomic jets in T Tauri stars. The coupled ionization, chemical and thermal evolution along dusty flow streamlines is computed for a prescribed MHD disk wind solution, using a method developed for magnetized shocks in the interstellar medium. Irradiation by wind-attenuated coronal X-rays and FUV photons from accretion hot spots is included, with self-shielding of H2 and CO. Disk accretion rates of 5e-6, 1e-6 and 1e-7 solar masses per year are considered, representative of low-mass young protostars (Class 0), evolved protostars (Class I) and very active T Tauri stars (Class II). The disk wind has an onion-like thermo-chemical structure, with streamlines launched from larger radii having lower temperature and ionisation, and higher H2 abundance. The coupling between charged and neutral fluids is sufficient to eject molecules from the disk out to 9 AU. The launch radius beyond which most H2 survives moves outward with evolutionary stage. CO survives in the Class 0 but is significantly photodissociated in the Class I/II. Balance between ambipolar heating and molecular cooling establishes an asymptotic temperature 700-3000 K, with cooler jets at earlier protostellar stages. Endothermic formation of H2O is efficient with abundances up to 1e-4, while CH+ and SH+ can exceed 1e-6 in the Class I/II winds. A centrifugal MHD disk wind launched from beyond 0.2-1 AU can produce molecular jets/winds up to speeds 100 km/s in young low-mass stars. The model predicts a high ratio H2/CO and an increase of molecular launch radius, temperature, and flow width as the source evolves, in agreement with current observed trends.
description: 21 pages, 13 figures; Astronomy & Astrophysics, 23 Nov 2011
Local Anisotropy, Higher Order Statistics, and Turbulence Spectra
Creators: name: Matthaeus, W. H.
name: Servidio, S.
name: Dmitruk, P.
name: Carbone, V.
name: Oughton, S.
name: Wan, M.
name: Osman, K. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Space Physics (physics.space-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Computational Physics (physics.comp-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Correlation anisotropy emerges dynamically in magnetohydrodynamics (MHD), producing stronger gradients across the large-scale mean magnetic field than along it. This occurs both globally and locally, and has significant implications in space and astrophysical plasmas, including particle scattering and transport, and theories of turbulence. Properties of local correlation anisotropy are further documented here by showing through numerical experiments that the effect is intensified in more localized estimates of the mean field. The mathematical formulation of this property shows that local anisotropy mixes second-order with higher order correlations. Sensitivity of local statistical estimates to higher order correlations can be understood in connection with the stochastic coordinate system inherent in such formulations. We demonstrate this in specific cases, illustrate the connection to higher order statistics by showing the sensitivity of local anisotropy to phase randomization, and thus establish that the local structure function is not a measure of the energy spectrum. Evidently the local enhancement of correlation anisotropy is of substantial fundamental interest, and this phenomenon must be understood in terms of higher order correlations, fourth-order and above.
description: 5 pages, 1 figure, submitted to ApJ
No evidence for absence of solar dynamo synchronization
Creators: name: Stefani, F.
name: Beer, J.
name: Weier, T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context: The old question of whether the solar dynamo is synchronized by the tidal forces of the orbiting planets has recently received renewed interest, both from the viewpoint of historical data analysis and in terms of theoretical and numerical modelling. Aims: We aim to contribute to the solution of this longstanding puzzle by analyzing cosmogenic radionuclide data from the last millennium. Methods: We reconsider a recent time-series of $^{14}$C-inferred sunspot data and compare the resulting cycle minima and maxima with the corresponding conventional series down to 1610 A.D., enhanced by Schove's data before that time. Results: We find that, despite recent claims to the contrary, the $^{14}$C-inferred sunspot data are well compatible with a synchronized solar dynamo, exhibiting a relatively phase-stable period of 11.07 years, which points to a synchronizing role of the spring tides of the Venus-Earth-Jupiter system.
description: 8 pages, 7 figures
New ventilation design criteria for underground metal mines based upon the "life-cycle" airflow demand schedule
Creators: name: Kocsis, Karoly-Charles P.
Publisher: name: University of British Columbia
Year: 2009

description: Presently, mine ventilation systems are designed more towards the “worst-case-scenario” with respect to airflow demand, which usually occurs well in the future of a mine’s operating life. Consequently, within the early stages of operation, the mines’ intake air volume could be well in excess of their “true” ventilation needs. Such ventilation systems are inefficient and this design approach needs to change if Canadian mines are to remain competitive while attempting to reduce their carbon footprints. This thesis introduces a new method that can be used to evaluate the efficiency of large and complex underground ventilation systems. This new evaluation method is based upon the magnitude of a mine’s potential “ventilation redundancy” that can be used to gauge the efficiency of its ventilation system. Two conventionally analyzed case studies presented in this thesis highlight the complexity and difficulty in determining the ventilation redundancy in large and deep metal mines. Challenges include gaining adequate data to assess the dynamic nature of the production activities that continually redefine where ventilation is required. To address this issue, this thesis introduces a novel method, where a multi-level mining block’s activity based intake air volume is determined through discrete-event mining process simulation using AutoModTM. In accordance with the number of active mining blocks that will be required to achieve future production requirements, the mine’s “traditional” and “activity based” life-cycle airflow demand schedule is subsequently determined. Furthermore, based upon the life-cycle airflow demand schedule the mine’s primary and auxiliary ventilation systems are solved through ventilation simulation. The output data generated through ventilation simulation was then used to determine the economic and environmental benefits of an “activity based” ventilation system versus a “traditional” ventilation system. This new ventilation design concept, which is based upon the mine’s life-cycle airflow demand schedule determined through discrete-event process simulation can fundamentally change the way underground ventilation systems are presently designed and operated. This can be extremely important for the reason that besides providing adequate airflow to the production workings, this new design approach would assist the mines to reduce their energy consumption and consequently their GHG emissions.
Vested economic interests and social change: the case of the hot rodder, Detroit, and the supercar
Creators: name: Listiak, Alan Michael
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: HM 211 L56 1972
subject: Industry - Social aspects
subject: Social change
subject: Automobile industry and trade
subject: Automobiles, Racing

description: Bibliography: p. 149-175.
Discovery of the most isolated globular cluster in the local universe
Creators: name: Jang, In Sung
name: Lim, Sungsoon
name: Park, Hong Soo
name: Lee, Myung Gyoon
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the discovery of two new globular clusters in the remote halos of M81 and M82 in the M81 Group based on Hubble Space Telescope archive images. They are brighter than typical globular clusters (MV = -9.34 mag for GC-1 and M_V = -10.51 mag for GC-2), and much larger than known globular clusters with similar luminosity in the MilkyWay Galaxy and M81. Radial surface brightness profiles for GC-1 and GC-2 do not show any features of tidal truncation in the outer part. They are located much farther from both M81 and M82 in the sky, compared with previously known star clusters in these galaxies. Color-magnitude diagrams of resolved stars in each cluster show a well-defined red giant branch (RGB), indicating that they are metal-poor and old. We derive a low metallicity with [Fe/H] $\simeq -2.3$ and an old age ~14 Gyr for GC-2 from the analysis of the absorption lines in its spectrum in the Sloan Digital Sky Survey in comparison with the simple stellar population models. The I-band magnitude of the tip of the RGB for GC-2 is 0.26 mag fainter than that for the halo stars in the same field, showing that GC-2 is ~400 kpc behind the M81 halo along our line of sight. The deprojected distance to GC-2 from M81 is much larger than any other known globular clusters in the local universe. This shows that GC-2 is the most isolated globular cluster in the local universe.
description: 6 pages with 5 figures
Fimbria lesions and cue utilization in the rat
Creators: name: Gray, D. Shaun
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: QP 381 G73 1977 Microfiche
subject: Hippocampus (Brain)
subject: Brain - Localization of functions
subject: Rats
subject: Psychology, Physiological

description: Bibliography: p. 104-115.
b-Contact Structures on Tentacular Hyperboloids
Creators: name: Vogel, Michael
name: Wisniewska, Jagna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: This paper connects two different approaches to the analysis of Hamiltonian dynamics on non-compact energy hypersurfaces - $b$-symplectic geometry with its singular symplectic form and Floer techniques for tentacular Hamiltonians. More precisely, we show how to equip tentacular hyperboloids with a $b$-contact structure. We construct a $b^3$-symplectic manifold $(X, Z, ω_b)$, such that each connected component of $X\setminus Z$ is symplectomorphic to the standard symplectic space $(T^*\mathbb{R}^n, ω_0)$. For a tentacular hyperboloid $S \subseteq T^*\mathbb{R}^n$ we look at its copies in $X \setminus Z$ and show that their completion in $(X,Z, ω_b)$ is a smooth hypersurface of $b$-contact type.
Macroscopic aspects of relativistic x-ray assisted high-order harmonic generation
Creators: name: Kohler, Markus C.
name: Hatsagortsyan, Karen Z.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A theoretical model is developed describing high-order harmonic generation (HHG) from a gas of multiply-charged ions driven by a laser field of relativistic intensity. Macroscopic propagation of harmonics is investigated in a relativistic HHG setup where the relativistic drift is suppressed by means of x-ray field assistance of the driving laser field. The possibility of phase-matched emission of the harmonics is shown. The laser field geometry is optimized to maximize the HHG yield with the corresponding phase-matching schemes. Crucial issues determining the macroscopic HHG yield are discussed in detail.
The Evolution of the 1/f Range Within a Single Fast-Solar-Wind Stream Between 17.4 and 45.7 Solar Radii
Creators: name: Davis, Nooshin
name: Chandran, B. D. G.
name: Bowen, T. A.
name: Badman, S. T.
name: de Wit, T. Dudok
name: Chen, C. H. K.
name: Bale, S. D.
name: Huang, Zesen
name: Sioulas, Nikos
name: Velli, Marco
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The power spectrum of magnetic-field fluctuations in the fast solar wind ($V_{\rm SW}> 500 \mbox{ km} \mbox{ s}^{-1}$) at magnetohydrodynamic (MHD) scales is characterized by two different power laws on either side of a break frequency $f_{\rm b}$. The low-frequency range at frequencies $f$ smaller than $f_{\rm b}$ is often viewed as the energy reservoir that feeds the turbulent cascade at $f>f_{\rm b}$. At heliocentric distances $r$ exceeding $60$ solar radii ($R_{\rm s}$), the power spectrum often has a $1/f$ scaling at $f