cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Magnetic Field Effects on Transport Properties of PtSn4
Creators: name: Mun, Eundeok
name: Ko, Hyunjin
name: Miller, Gordon J.
name: Samolyuk, German D.
name: Bud'ko, Sergey L.
name: Canfield, Paul. C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The anisotropic physical properties of single crystals of orthorhombic PtSn4 are reported for magnetic fields up to 140 kOe, applied parallel and perpendicular to the crystallographic b-axis. The magnetic susceptibility has an approximately temperature independent behavior and reveals an anisotropy between ac-plane and b-axis. Clear de Haas-van Alphen oscillations in fields as low as 5 kOe and at temperatures as high as 30 K were detected in magnetization isotherms. The thermoelectric power and resistivity of PtSn4 show the strong temperature and magnetic field dependencies. A change of the thermoelectric power at H = 140 kOe is observed as high as ~ 50 mu-V/K. Single crystals of PtSn4 exhibit very large transverse magnetoresistance of ~ 5x10^5% for the ac-plane and of ~ 1.4x10^5% for the b-axis resistivity at 1.8 K and 140 kOe, as well as pronounced Shubnikov-de Haas oscillations. The magnetoresistance of PtSn4 appears to obey Kohler's rule in the temperature and field range measured. The Hall resistivity shows a linear temperature dependence at high temperatures followed by a sign reversal around 25 K which is consistent with thermoelectric power measurements. The observed quantum oscillations and band structure calculations indicate that PtSn4 has three dimensional Fermi surfaces.
description: accepted to PRB
Changing minds: Appeal decisions and expert witnesses in court
Creators: name: Schell-Leugers, Jennifer
name: Figueiredo, Monica Dos Santos
name: Aïsha De Windt
name: Enide Maegherman
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: This research project focuses on differences between decisions by courts of first instance and courts of appeal, thereby taking into account the role of the expert witness. Different methodologies and approaches will be used.
Neuerscheinungen
Creators: name: Redaktion, Die
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2020

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 49 Nr. 4 (2020)
Die Landesdenkmalpflege
Creators: name: Redaktion, Die
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2020

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 49 Nr. 4 (2020)
Well-posedness of the stochastic time-fractional diffusion and wave equations and inverse random source problems
Creators: name: Lassas, Matti
name: Li, Zhiyuan
name: Zhang, Zhidong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R30, 35R11, 35R60, 60H15, 60J65

description: In this paper, we are concerned with the stochastic time-fractional diffusion-wave equations in a Hilbert space. The main objective of this paper is to establish properties of the stochastic weak solutions of the initial-boundary value problem, such as the existence, uniqueness and regularity estimates. Moreover, we apply the obtained theories to an inverse source problem. The uniqueness of this inverse problem under the boundary measurements is proved.
Measuring the Bottom-Quark Forward-Central Asymmetry at the LHC
Creators: name: Kahawala, Dilani
name: Krohn, David
name: Strassler, Matthew J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Measurements of the top quark forward-backward asymmetry performed at the Tevatron suggest that new-physics may be playing a role in t-tbar production. To better understand the source of the asymmetry, recent proposals have called for a measurement of the bottom and charm forward-backward asymmetries at the Tevatron, using jets with embedded muons. Here we propose a corresponding measurement of the bottom quark forward-central asymmetry designed to look for similar effects in the b-sector at ATLAS and CMS. We construct a set of cuts designed to enhance sensitivity to this asymmetry, and test our analysis on a toy axigluon model representative of those used to explain the top asymmetry. We find that if the relevant new-physics couplings to the bottom quark are similar to those of the top, then the effects should be visible at the two sigma level in less than 10 fb-1 of 7 TeV LHC data. Such a measurement would be of general importance, and would provide valuable model-building input, serving to restrict the set of models put forward to explain the Tevatron t-tbar anomaly. However, a relatively low trigger threshold on non-isolated muons inside hard jets must be maintained to allow for this measurement.
New description of the scaling evolution of the cosmological magneto-hydrodynamic system
Creators: name: Uchida, Fumio
name: Fujiwara, Motoko
name: Kamada, Kohei
name: Yokoyama, Jun'ichi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a new description of cosmological evolution of the primordial magnetic field under the condition that it is non-helical and its energy density is larger than the kinetic energy density. We argue that the evolution can be described by four different regimes, according to whether the decay dynamics is linear or not, and whether the dominant dissipation term is the shear viscosity or the drag force. Using this classification and conservation of the Hosking integral, we present analytic models to adequately interpret the results of various numerical simulations of field evolution with variety of initial conditions. It is found that, contrary to the conventional wisdom, the decay of the field is generally slow, exhibiting the inverse transfer, because of the conservation of the Hosking integral. Using the description proposed here, we may trace the intermediate evolution history of the magnetic field and clarify whether each process governing its evolution is frozen or not, which is essential to follow the evolution of relatively weak magnetic fields.
description: 11 pages, 4 figures, 1 table
Effect of Edge Roughness on resistance and switching voltage of Magnetic Tunnel Junctions
Creators: name: Pandey, Rachit R.
name: Dutta, Sutapa
name: Mendonca, Heston A.
name: Tulapurkar, Ashwin A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the impact of edge roughness on the electrical transport properties of magnetic tunnel junctions using non-equilibrium Greens function formalism. We have modeled edge roughness as a stochastic variation in the cross-sectional profile of magnetic tunnel junction characterized by the stretched exponential decay of the correlation function. The stochastic variation in the shape and size changes the transverse energy mode profile and gives rise to the variations in the resistance and switching voltage of the magnetic tunnel junction. We find that the variations are larger as the magnetic tunnel junction size is scaled down due to the quantum confinement effect. A model is proposed for the efficient calculation of edge roughness effects by approximating the cross-sectional geometry to a circle with the same cross-sectional area. Further improvement can be obtained by approximating the cross-sectional area to an ellipse with an aspect ratio determined by the first transverse eigenvalue corresponding to the 2D cross section. These results would be useful for reliable design of the spin transfer torque-magnetic random access memory (STT-MRAM) with ultra-small magnetic tunnel junctions.
description: 3 pages, 3 figures
The chiral transition and U(1)_A symmetry restoration from lattice QCD using Domain Wall Fermions
Creators: name: HotQCD Collaboration
name: Bazavov, A.
name: Bhattacharya, Tanmoy
name: Buchoff, Michael I.
name: Cheng, Michael
name: Christ, N. H.
name: Ding, H. -T.
name: Gupta, Rajan
name: Hegde, Prasad
name: Jung, Chulwoo
name: Karsch, F.
name: Lin, Zhongjie
name: Mawhinney, R. D.
name: Mukherjee, Swagato
name: Petreczky, P.
name: Soltz, R. A.
name: Vranas, P. M.
name: Yin, Hantao
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present results on both the restoration of the spontaneously broken chiral symmetry and the effective restoration of the anomalously broken U(1)_A symmetry in finite temperature QCD at zero chemical potential using lattice QCD. We employ domain wall fermions on lattices with fixed temporal extent N_τ= 8 and spatial extent N_σ= 16 in a temperature range of T = 139 - 195 MeV, corresponding to lattice spacings of a \approx 0.12 - 0.18 fm. In these calculations, we include two degenerate light quarks and a strange quark at fixed pion mass m_π= 200 MeV. The strange quark mass is set near its physical value. We also present results from a second set of finite temperature gauge configurations at the same volume and temporal extent with slightly heavier pion mass. To study chiral symmetry restoration, we calculate the chiral condensate, the disconnected chiral susceptibility, and susceptibilities in several meson channels of different quantum numbers. To study U(1)_A restoration, we calculate spatial correlators in the scalar and pseudo-scalar channels, as well as the corresponding susceptibilities. Furthermore, we also show results for the eigenvalue spectrum of the Dirac operator as a function of temperature, which can be connected to both U(1)_A and chiral symmetry restoration via Banks-Casher relations.
description: 80 pages, 14 figures, 4 appendices
Multimodal close reading as currency : transmediating poetic language through artistic design
Creators: name: Yeung, Cindy K. L.
Publisher: name: University of British Columbia
Year: 2009

description: This Master’s thesis explores the use of artistic design in a senior high school English class to teach the stylistic analysis of poetry. As a reflective, critical inquiry into my own classroom practice, this paper follows primarily the methodology of teacher research. A less prominent but equally important methodology is the autobiographical living inquiry of a/r/tography. My research features a poetry project for an English 12 class in a fine arts mini-school. Students conducted a close reading of a poem and then communicated their interpretation and analysis by creating an original artistic work in a non-textual mode. The students also articulated their own process of design. By exploring parallels between the poem and their artistic work, they developed a descriptive metalanguage to analyze the rhetorical connections between different modes of communication. This paper draws on the research areas of multiliteracies pedagogy and aesthetic education to investigate the implications of transmediating poetic texts. The study of the classroom project is framed within my overarching inquiry into the value of teaching literary close reading in an age when literacy educators face increasing obligations to prepare students for the world of the globalized knowledge economy. I use the notion of currency, both as monetary worth and as fluidity, to argue that the stylistic analysis of literature—which is usually not perceived as utilitarian—can indeed be useful outside the English language arts classroom. A project in which students explore literary close reading through multimodal design can help them develop critical and creative skills that do have value and can therefore be considered currency in the students’ social and economic futures.
Re-examination of the social action process of the C.Y.C. experience
Creators: name: Day, Michael George
Publisher: name: University of Calgary
Year: 1970
Subjects: subject: HV 41 D39 1970
subject: Social action
subject: Company of Young Canadians
subject: Social workers - Canada

description: Bibliography: p. 147-154.
description: The concept of social action has had several severely contrasting meanings. This thesis has been addressed to the term's utilization in its more restricted sense as a form of social practice in which social change goals are paramount. An earlier consensual model, now more properly described by terms derived from other social processes, is presently being replaced by a practice model in which elements of obstruction to change and of conflict are fundamental components. This model has evolved pragmatically and unsystematically. Commitment to goal has not been matched by attention to process. Also insufficient attention both in practice and in analysis has been given to important action system components and intersystem consequences. These deficiencies threaten program continuation and program outcomes. Further work is needed to advance the adequacy and utility of the social action model. This thesis is a contribution to this end. It identifies the phenomena previously referred to and examines their significance in the events affecting the practice of the model in an important organizational attempt to apply it; that is the op erations of the Company of Young Canadians. iii Among the hypotheses are the following: A social action program (by definition containing conflict characteristics) will evoke a counter acti on from the target institutions; neglect of supportive processes produce poi nts of vulnerability which draw the counter action; failure to develop internal cohesion reduces the capability for effective defense or response; failure to attempt to achieve coalitions with potential ly supportive systems deny a possible strength and contribute to a program's isolation; failure to develop a strategic analysis with respect to goals and means obscures the political contingencies within which a program operates; internal splintering with respect to goals is amplified by the counter action and results in the reduced ability to continue the action focus; the outcome is the termination of the fundamental components of the model. These h ypotheses seem to be confirme d in the experience of t h e C.Y.C . The positive inclusion in the model of t hese elements identified in the h ypotheses constitutes a set of contributions to the s trengthening of a social ac t ion practice model.
Gas Doping on the Topological Insulator Bi2Se3 Surface
Creators: name: Koleini, Mohammad
name: Frauenheim, Thomas
name: Yan, Binghai
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Gas molecule doping on the topological insulator Bi2 Se3 surface with existing Se vacancies is investigated using first-principles calculations. Consistent with experiments, NO2 and O2 are found to occupy the Se vacancy sites, remove vacancy-doped electrons and restore the band structure of a perfect surface. In contrast, NO and H2 do not favour passivation of such vacancies. Interestingly we have revealed a NO2 dissociation process that can well explain the speculative introduced "photon-doping" effect reported by recent experiments. Experimental strategies to validate this mechanism are presented. The choice and the effect of different passivators are discussed. This step paves the way for the usage of such materials in device applications utilizing robust topological surface states.
Supervised feature evaluation by consistency analysis: application to measure sets used to characterise geographic objects
Creators: name: Taillandier, Patrick
name: Drogoul, Alexis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Nowadays, supervised learning is commonly used in many domains. Indeed, many works propose to learn new knowledge from examples that translate the expected behaviour of the considered system. A key issue of supervised learning concerns the description language used to represent the examples. In this paper, we propose a method to evaluate the feature set used to describe them. Our method is based on the computation of the consistency of the example base. We carried out a case study in the domain of geomatic in order to evaluate the sets of measures used to characterise geographic objects. The case study shows that our method allows to give relevant evaluations of measure sets.
Spin-1 quarkonia in a rotating frame and their spin contents
Creators: name: Kim, HyungJoo
name: Cho, Sungtae
name: Lee, Su Houng
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a new way of studying the spin content of a hadron by looking at its response in a rotating frame. By collecting all responses of quarks and gluons in a rotating frame, we describe the spin-rotation coupling of spin-1 quarkonia and thereby reveal their spin contents in a relativistic formalism. We demonstrate that both the perturbative and non-perturbative contributions in the operator product expansion follow a universal formula that identifies the spin-rotation coupling with unit strength. This allows us to recognize the total spin-1 of the vector and axial vector quarkonia in terms of the total angular momentum of quarks and gluons. Specifically, we find the spin contents of $J/ψ$, $χ_{c1}$, $Υ(1S)$, and $χ_{b1}$ are slightly different from the naive quark model picture. For example, the $J/ψ$ is traditionally considered as an S-wave particle, but we find quarks do not carry all of the total spin.
description: 5 pages, 2 figures
On the inertia of heat
Creators: name: Smerlak, Matteo
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Does heat have inertia? This question is at the core of a long-standing controversy on Eckart's dissipative relativistic hydrodynamics. Here I show that the troublesome inertial term in Eckart's heat flux arises only if one insists on defining thermal diffusivity as a spacetime constant. I argue that this is the most natural definition, and that all confusion disappears if one considers instead the space-dependent comoving diffusivity, in line with the fact that, in the presence of gravity, space is an inhomogeneous medium.
description: 3 pages
Utilization of a community newspaper by community leaders: an exploratory study
Creators: name: Kirwin, William John
Publisher: name: University of Calgary
Year: 1970
Subjects: subject: PN 4784 C73 K55 1970
subject: Community newspapers - Alberta - Edmonton
subject: Community leadership
subject: Community organization
subject: Oliver Opinion (Newspaper)

description: Bibliography: p. 66-67.
Large negative lateral shifts due to negative refraction
Creators: name: Benedicto, Jessica
name: Pollès, Rémi
name: Moreau, Antoine
name: Centeno, Emmanuel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: When a thin structure in which negative refraction occurs (a metallo-dielectric or a photonic crystal) is illuminated by a beam, the reflected and transmitted beam can undergo a large negative lateral shift. This phenomenon can be seen as an interferential enhancement of the geometrical shift and can be considered as a signature of negative refraction.
Ryff’s Acanthus
Creators: name: Petcu, Elizabeth J.
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2020

description: This article proposes a new framework for examining the empirical research of early modern architects. It explores the rise of nature study in sixteenth-century architectural theory and practice through the works of physician and architecture expert Walther Hermann Ryff (c. 1500–1548). The article argues that Ryff’s 1548 Vitruvius Teutsch, the first German translation of Vitruvius’s De architectura, gave architects pathbreaking advice about performing design research in nature. Ryff’s book supported the botanical investigations of architects by aping empirically derived botanical imagery from the De historia stirpium of Leonhart Fuchs (1501–1566) and by comparing architectural nature study to the period craze for examining ancient ruins firsthand. In proposing a new mode of architectural empiricism, Vitruvius Teutsch reconciled tensions between abstract theory and hands-on practice in the formation of architectural knowledge.
description: 21: Inquiries into Art, History, and the Visual, Vol 1 No 2 (2020): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
Exploring the overlap between family learning and exhibit label text at an interactive science exhibit
Creators: name: Hall, Jennifer Anne
Publisher: name: University of British Columbia
Year: 2009

description: Visiting in family groupings, many parents and children attend museums expecting their visit to involve learning in some capacity. Families engage in learning experiences when they interact with exhibits designed by the museum. Museums are also responsible for the exhibit label text that accompanies exhibits, which can act as a key educative tool. Using a sociocultural theoretical framework, this study assumed that learning is mediated by social engagement and that a family operates as a unique community of learners. It was also assumed that learning is mediated when a group of family members engage with and respond to settings designed by the museum. In these situations families interact with exhibit label text. This study investigated the ways in which family learning was mediated by exhibit label text. Twenty seven families participated in the study, which employed an interpretive case study approach to data gathering. Each family was considered a singular case with its own unique expectations and agendas, which influenced their exhibit experiences. The exhibit experiences were investigated through an analysis of conversations between parents and children at the exhibit, during which one of four labels was on view. Pre- and post-exhibit experience interviews were conducted with parents who were asked to respond to different label text. The outcomes of this study suggest that exhibit label text can act as a very effective research tool for the identification of family’s learning agendas and experiences. Three key findings were noted: 1. Not all parents consider the same exhibit label text to be relevant to their family learning experience. 2. Parents value label text that prompts and supports their exploration of and conversation about the interactive science exhibit. 3. Parents also consider label text as a mediator of learning opportunities that extend beyond the museum visit. Further recommendations for museum educators, exhibit designers, and researchers are addressed in the concluding chapter, including suggestions for future studies about both family learning and exhibit label text.
Non-volatile electrically programmable integrated photonics with a 5-bit operation
Creators: name: Chen, Rui
name: Fang, Zhuoran
name: Perez, Christopher
name: Miller, Forrest
name: Kumari, Khushboo
name: Saxena, Abhi
name: Zheng, Jiajiu
name: Geiger, Sarah J.
name: Goodson, Kenneth E.
name: Majumdar, Arka
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Scalable programmable photonic integrated circuits (PICs) can potentially transform the current state of classical and quantum optical information processing. However, traditional means of programming, including thermo-optic, free carrier dispersion, and Pockels effect result in either large device footprints or high static energy consumptions, significantly limiting their scalability. While chalcogenide-based non-volatile phase-change materials (PCMs) could mitigate these problems thanks to their strong index modulation and zero static power consumption, they often suffer from large absorptive loss, low cyclability, and lack of multilevel operation. Here, we report a wide-bandgap PCM antimony sulfide (Sb2S3)-clad silicon photonic platform simultaneously achieving low loss, high cyclability, and 5-bit operation. We switch Sb2S3 via an on-chip silicon PIN diode heater and demonstrate components with low insertion loss (<1.0 dB), high extinction ratio (>10 dB), and high endurance (>1,600 switching events). Remarkably, we find that Sb2S3 can be programmed into fine intermediate states by applying identical and thermally isolated pulses, providing a unique approach to controllable multilevel operation. Through dynamic pulse control, we achieve on-demand and accurate 5-bit (32 levels) operations, rendering 0.50 +- 0.16 dB contrast per step. Using this multilevel behavior, we further trim random phase error in a balanced Mach-Zehnder interferometer. Our work opens an attractive pathway toward non-volatile large-scale programmable PICs with low-loss and on-demand multi-bit operations.
description: 22 pages, 6 figures in main text
Relativistic calculations of the K-K charge transfer and K-vacancy production probabilities in low-energy ion-atom collisions
Creators: name: Tupitsyn, I. I.
name: Kozhedub, Y. S.
name: Shabaev, V. M.
name: Bondarev, A. I.
name: Deyneka, G. B.
name: Maltsev, I. A.
name: Hagmann, S.
name: Plunien, G.
name: Stoehlker, Th.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The previously developed technique for evaluation of charge-transfer and electron-excitation processes in low-energy heavy-ion collisions [I.I. Tupitsyn et al., Phys. Rev. A 82, 042701(2010)] is extended to collisions of ions with neutral atoms. The method employs the active electron approximation, in which only the active electron participates in the charge transfer and excitation processes while the passive electrons provide the screening DFT potential. The time-dependent Dirac wave function of the active electron is represented as a linear combination of atomic-like Dirac-Fock-Sturm orbitals, localized at the ions (atoms). The screening DFT potential is calculated using the overlapping densities of each ions (atoms), derived from the atomic orbitals of the passive electrons. The atomic orbitals are generated by solving numerically the one-center Dirac-Fock and Dirac-Fock-Sturm equations by means of a finite-difference approach with the potential taken as the sum of the exact reference ion (atom) Dirac-Fock potential and of the Coulomb potential from the other ion within the monopole approximation. The method developed is used to calculate the K-K charge transfer and K-vacancy production probabilties for the Ne$(1s^2 2s^2 2p^6)$ -- F$^{8+}(1s)$ collisions at the F$^{8+}(1s)$ projectile energies 130 keV/u and 230 keV/u. The obtained results are compared with experimental data and other theoretical calculations. The K-K charge transfer and K-vacancy production probabilities are also calculated for the Xe -- Xe$^{53+}(1s)$ collision.
description: 16 pages, 4 figures
РУЎХЫЙ КӘМИЛЛИКТИ ҚӘСТЕРЛЕГЕН АЛЫМ
Creators: name: Айтмуратова, З.
Publisher: name: Zenodo
Year: 2023

description: Өзбекстан Республикасы Президенти Ш.Мирзиёев Қарақалпақстан Республикасындағы сайлаў алды ушырасыўында мәмлекетимизде илим-пәнниң раўажланыўына мүнәсип үлес қосқан марҳум академиклер қатарында академик Жуманазар Базарбаевтың салмақлы хызметин атап көрсеткен еди.
A surface-aware projection basis for quasigeostrophic flow
Creators: name: Smith, K. S.
name: Vanneste, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Recent studies indicate that altimetric observations of the ocean's mesoscale eddy field reflect the combined influence of surface buoyancy and interior potential vorticity anomalies. The former have a surface-trapped structure, while the latter have a more grave form. To assess the relative importance of each contribution to the signal, it is useful to project the observed field onto a set of modes that separates their influence in a natural way. However, the surface-trapped dynamics are not well-represented by standard baroclinic modes; moreover, they are dependent on horizontal scale. Here we derive a modal decomposition that results from the simultaneous diagonalization of the energy and a generalisation of potential enstrophy that includes contributions from the surface buoyancy fields. This approach yields a family of orthonomal bases that depend on two parameters: the standard baroclinic modes are recovered in a limiting case, while other choices provide modes that represent surface and interior dynamics in an efficient way. For constant stratification, these modes consist of symmetric and antisymmetric exponential modes that capture the surface dynamics, and a series of oscillating modes that represent the interior dynamics. Motivated by the ocean, where shears are concentrated near the upper surface, we also consider the special case of a quiescent lower surface. In this case, the interior modes are independent of wavenumber, and there is a single exponential surface mode that replaces the barotropic mode. We demonstrate the use and effectiveness of these modes by projecting the energy in a set of simulations of baroclinic turbulence.
A Study of the Calgary ambient aerosol
Creators: name: Pi, Rosaline Wing-Kam
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: TD 890 P5 1979 Microfiche
subject: Air quality - Alberta - Calgary
subject: Air - Pollution - Measurement - Optical methods
subject: Aerosols - Measurement

description: Bibliography: p. 89-91.
Bau von und Umbau zu Adverbien: Präpositionen, Vergleiche und Flexion
Creators: name: Brandt, Patrick
Publisher: name: Bausteine einer Korpusgrammatik des Deutschen
Year: 2020

description: This chapter focuses on the formation of adverbs from a corpuslinguistic perspective, providing an overview of adverb formation patterns in German that includes frequencies and hints to productivity as well as combining quantitative methods and theoretically founded hypotheses to address questions that concern possible grammaticalization paths in domains that are formally marked by prepositional elements or inflectional morphology (in particular, superlative or superlative-derived forms).
description: Bausteine einer Korpusgrammatik des Deutschen , Bd. 1 (2020): Bausteine einer Korpusgrammatik des Deutschen
Constraints from the duration of supernova neutrino burst on on-shell light gauge boson production by neutrinos
Creators: name: Cerdeño, David G.
name: Cermeño, Marina
name: Farzan, Yasaman
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we study the on-shell production of low-mass vector mediators from neutrino-antineutrino coalescence in the core of proto-neutron stars. Taking into account the radial dependence of the density, energy, and temperature inside the proto-neutron star, we compute the neutrino-antineutrino interaction rate in the star interior in the well-motivated $U(1)_{L_μ-L_τ}$ model. First, we determine the values of the coupling above which neutrino-antineutrino interactions dominate over the Standard Model neutrino-nucleon scattering. We argue that, although in this regime a redistribution of the neutrino energies might take place, making low-energy neutrinos more trapped, this only affects a small part of the neutrino population and it cannot be constrained with the SN 1987A data. Thus, contrary to previous claims, the region of the parameter space where the $U(1)_{L_μ-L_τ}$ model explains the discrepancy in the muon anomalous magnetic moment is not ruled out. We then focus on small gauge couplings, where the decay length of the new gauge boson is larger than the neutrino-nucleon mean free path, but still smaller than the size of proto-neutron star. We show that in this regime, the on-shell production of a long-lived $Z'$ and its subsequent decay into neutrinos can significantly reduce the duration of the neutrino burst, probing values of the coupling below ${\cal O}(10^{-7})$ for mediator masses between 10 and 100 MeV. This disfavours new areas of the parameter space of the $U(1)_{L_μ-L_τ}$ model.
description: 21 pages, 5 figures. Minor changes. Final version, published in PRD
Averaging approximation to singularly perturbed nonlinear stochastic wave equations
Creators: name: Lv, Yan
name: Roberts, A. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: An averaging method is applied to derive effective approximation to the following singularly perturbed nonlinear stochastic damped wave equation νu_{tt}+u_t=\D u+f(u)+ν^α\dot{W} on an open bounded domain $D\subset\R^n$\,, $1\leq n\leq 3$\,. Here $ν>0$ is a small parameter characterising the singular perturbation, and $ν^α$\,, $0\leq α\leq 1/2$\,, parametrises the strength of the noise. Some scaling transformations and the martingale representation theorem yield the following effective approximation for small $ν$, u_t=\D u+f(u)+ν^α\dot{W} to an error of $\ord{ν^α}$\,.
description: 16 pages. Submitted
Calgary town council, 1884-1895: a study of local government in a frontier environment
Creators: name: Foran, Max (Maxwell Laurence)
Publisher: name: University of Calgary
Year: 1970
Subjects: subject: JC 1731 F65 1970
subject: Municipal government - Alberta - Calgary
subject: Calgary (Alta.) - Politics and government

description: Bibliography: p. 139-148.
description: The following thesis examines the institution of government at the local level. Using data gleaned from city and other records, personal papers, official reports, minute books and the newspaper files, this study of local government in Calgary's first ten years of civic existence, 1884-1895, attempts to analyse the structure and policies of the town Council, and establish parameters with which this body may be assessed as fulfilling the role for which it was legally constituted. In this respect, the concept of Council as a representative, decision-making corporate entity is abstracted from ordinance as embodying the ideal of local government in late nineteenthcentury society. The fact that local government was forced to operate in a frontier environment is seen as placing fundamental limitations on the successful implementation of its policies. On the other hand it was the urban nature of the young town which decreed that local government at least attempt to transcend these deficiencies. In reacting to these two opposing forces, Calgary's town Councils followed understandable, even predictable patterns of behaviour. Firstly, local government in Calgary passed quickly into the hands of an elitist group which pursued policies in its own interests. Control of civic office was tightened in spite of democratic provisions, and the presence of an electorate which initially had shown marked interest in civic affairs. Furthermore, being basically concerned with matters that would contribute materially to the town's economic growth, this body evinced little interest in legislating or promulgating social leadership. Secondly, the Council did not function as a decision-making body, but was subject to vagaries, dissension, indecision, individual dominance, and outside influence. The elitist nature, combined with the absence of social leadership, and Council solidarity are seen as the major factors mitigating against any meaningful concept of local government as a representative, decision-making, corporate entity. Finally, local government derived its chief credence for being a vehicle of popular consensus through its role as promoter and guardian of town interests. In this, Council was most effective when entrepreneurial types dominated, and in Calgary's case a vital function is posited for that type of individual whose limitations bound him most securely to civic office. At its widest frame of reference the following thesis represents an approach to the study of a particular local government in its formative years. As a consequence, the delineation of criteria by which the viability of an infant and circumscribed institution can be projected, provides the overall historical thrust of this study.
Algorithmic approach to adiabatic quantum optimization
Creators: name: Dickson, Neil G.
name: Amin, Mohammad H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is believed that the presence of anticrossings with exponentially small gaps between the lowest two energy levels of the system Hamiltonian, can render adiabatic quantum optimization inefficient. Here, we present a simple adiabatic quantum algorithm designed to eliminate exponentially small gaps caused by anticrossings between eigenstates that correspond with the local and global minima of the problem Hamiltonian. In each iteration of the algorithm, information is gathered about the local minima that are reached after passing the anticrossing non-adiabatically. This information is then used to penalize pathways to the corresponding local minima, by adjusting the initial Hamiltonian. This is repeated for multiple clusters of local minima as needed. We generate 64-qubit random instances of the maximum independent set problem, skewed to be extremely hard, with between 10^5 and 10^6 highly-degenerate local minima. Using quantum Monte Carlo simulations, it is found that the algorithm can trivially solve all the instances in ~10 iterations.
description: 7 pages, 3 figures
Arrowwood: a Dunkard community, 1911 to 1936
Creators: name: Bloomfield, Donna J.
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: FC 3699 A77 B64 1978 Microfiche
subject: Arrowwood, Alberta - History
subject: Germans - Alberta

description: Bibliography: p. 108-113.
Quasiperiodic Heisenberg antiferromagnets in two dimensions
Creators: name: Jagannathan, Anuradha
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: This is a review of the properties of 2d quantum quasiperiodic antiferromagnets as reported in studies that have been carried out in the last decade. Many results have been obtained for perfectly ordered as well as for disordered two dimensional bipartite quasiperiodic tilings. The theoretical methods used include spin wave theory, and renormalization group along with Quantum Monte Carlo simulations. These methods all show that the ground state of these unfrustrated antiferromagnets have Néel type order but with a highly complex spatial distribution of local staggered magnetization. The ground state properties, excitation energies and spatial dependence, structure factor, and local susceptibilities are presented. The effects of introducing geometrical disorder on the magnetic properties are discussed.
description: 21 pages, 29 figures
Properties, investors and taxes: a study of Calgary real estate investment, municipal finances, and property tax arrears, 1911-1919
Creators: name: MacLeod, H. L.
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: HD 320 C3 M223 1977 Microfiche
subject: Real property - Alberta - Calgary
subject: Real estate investment - Alberta - Calgary
subject: Municipal finance - Alberta - Calgary

description: Bibliography: p. 149-154.
description: Calgary, in the years 1911 to 1919, went through a boom and collapse of which a principal manifestation was activity in the city's real estate market. The collapse of the real estate bcx::>m created severe diff­iculties both for investors and for the City. As real estate sales fell off, so too did Calgary tax collections, leaving both property owners and the City under the burden of mounting debt loads. Despite its financial problems, however, tt1e City was extremely reluctant to foreclose on properties on which taxes had not been paid. This study examines the problan of tax arrears first from the perspective of Calgary's municipal finances, and second through a sample of ':fl selected real estate investors who held various types of Calgary property. The examination of rmmicipal finances reveals the manner in which uncollected taxes were regarded and used by the City as assets, and in consequence why the civic authorities were so reluctant to foreclose on properties in arrears. The examination of the 37 investors and their hold­ings in five categories of Calgary property establishes general patterns of tax arrears. The investors who were IIDst seriously in arrears held a type of property which could not be rescld even at the height of the boar., or bought their properties too late to resell them. When the City, having exhausted the available alternatives, finally did resort to foreclosure and auction of the properties in arrears, the properties proved to be no more saleable at .auction than they had been on the open market. In consequence, the City acquired by default a very large quantity of land which it did not want, and was forced to write off the arrears of taxes owing on the land, while a large number of investors were dispossessed of their property.
Experimental demonstration of diffusion limitations on resolution and SNR in MR microscopy
Creators: name: Hardy, Benjamin M.
name: Zhu, Yue
name: Harkins, Kevin D.
name: Dhakal, Bibek
name: Martin, Jonathan B.
name: Xie, Jingping
name: Xu, Junzhong
name: Does, Mark D.
name: Anderson, Adam W.
name: Gore, John C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Medical Physics (physics.med-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Magnetic resonance microscopy images at cellular resolution (< 10 microns) are limited by diffusion. SNR and spatial resolution suffer from the dephasing of transverse magnetization caused by diffusion of spins in strong gradients. Such effects may be reduced by using phase encoding instead of frequency encoding readout gradients. Demonstration of the benefits of phase encoding are lacking, and the conditions in which it is preferred are not clearly established. We quantify when phase encoding outperforms a readout gradient with emphasis on the detrimental effects of diffusion on SNR and resolution. A 15.2T MRI scanner, with 1 T/m gradients, and micro solenoid RF coils < 1 mm in diameter, were used to quantify diffusion effects on resolution and SNR of frequency and phase encoded acquisitions. Frequency and phase encoding resolution and SNR per square root time were calculated and measured for images at the diffusion limited resolution. The point-spread-function was measured for phase and frequency encoding using additional constant time gradients with voxels 3-15 microns. The effect of diffusion during the readout gradient on SNR was experimentally demonstrated. The achieved resolutions of frequency and phase encoded acquisitions were measured via the point-spread-function. SNR per square root time and actual resolution were calculated for a wide range of gradient amplitudes, diffusion coefficients, and relaxation properties. The results provide a practical guide on how to choose between phase and frequency encoding. Images of excised rat spinal cord at 10 x 10 microns in-plane demonstrate benefits of phase encoding in the form of higher measured resolution and SNR vs the same image acquired with a conventional readout. We demonstrate the extent to which phase encoding outperforms readout gradients in SNR and resolution over a wide range of voxel sizes, sample, and hardware properties.
description: 36 pages, 9 figures, 1 table, and 4 supplemental figures. Submitted to Journal of Magnetic Resonance; cleaned up metadata, fixed heading typo
Ausgrabungen an St. Martin in Grevenbroich-Frimmersdorf – ein Beitrag zur frühen Orts- und Kirchengeschichte
Creators: name: Claßen, Erich
name: Holzem, Stefanie
name: Jungklaus, Bettina
name: Schwabroh, Christian
Publisher: name: Archäologie im Rheinland
Year: 2020

description: Archäologie im Rheinland, 2016(2017)
The Impact of the frontier on prairie Canada: selected themes, 1870-1916
Creators: name: Voisey, Paul Leonard
Publisher: name: University of Calgary
Year: 1975
Subjects: subject: FC 3217 V64 1976 Microfiche
subject: Prairie Provinces - History - To 1905
subject: Prairie Provinces - History - 1905-1945
subject: Frontier and pioneer life - Northwest, Canadian

description: Bibliography: p. 147-155.
Dynamic Response of Wigner Crystals
Creators: name: Zhao, Lili
name: Lin, Wenlu
name: Chung, Yoon Jang
name: Gupta, Adbhut
name: Baldwin, Kirk W.
name: Pfeiffer, Loren N.
name: Liu, Yang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The Wigner crystal, an ordered array of electrons, is one of the very first proposed many-body phases stabilized by the electron-electron interaction. This electron solid phase has been reported in ultra-clean two-dimensional electron systems at extremely low temperatures, where the Coulomb interaction dominants over the kinetic energy, disorder potential and thermal fluctuation. We closely examine this quantum phase with capacitance measurements where the device length-scale is comparable with the crystal's correlation length. The extraordinarily high performance of our technique makes it possible to quantitatively study the dynamic response of the Wigner crystal within the single crystal regime. Our result will greatly boost the study of this inscrutable electron solid.