cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A study of parallel pier finger airport terminal configurations
Creators: name: Dada, Ezekiel S.
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: TL 725.3 P5 D33 1992
subject: Airport terminals - Design and construction
subject: Airport buildings - Design and construction

description: Bibliography: p. 143-147.
description: Taxiing, walking, baggage transport and airport construction were studied to determine their effect on the geometry of pier finger terminals. The best terminal geometry based on taxiing alone is one with shorter fingers at the middle and longer ones at the ends. On the other hand, geometry that minimizes baggage transportation distance is the one with the longest pier at the centre. Baggage transportation distance is affected both by the geometry of the terminal and the sorting room strategy adopted. Decentralized sorting gives a lower baggage tractor distance than centralized sorting. Walking distance has been studied extensively by others who found that pier finger terminals minimize walking. As far as the operations considered are concerned, the terminal with pier lengths decreasing with distance from the centre gives the best combined optimal geometry. It also gives a lower number of piers than that found by others for walking only.
Bloch-wave engineering of quantum dot-micropillars for cavity quantum electrodynamics experiments
Creators: name: Lermer, Matthias
name: Gregersen, Niels
name: Dunzer, Florian
name: Reitzenstein, Stephan
name: Höfling, Sven
name: Mørk, Jesper
name: Worschech, Lukas
name: Kamp, Martin
name: Forchel, Alfred
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We have employed Bloch-wave engineering to realize submicron diameter ultra-high quality factor GaAs/AlAs micropillars (MPs). The design features a tapered cavity in which the fundamental Bloch mode is subject to an adiabatic transition to match the Bragg mirror Bloch mode. The resulting reduced scattering loss leads to record-high visibility of the strong coupling in MPs with modest oscillator strength quantum dots. A quality factor of 13,600 and a Rabi splitting of 85 \mueV with an estimated visibility v of 0.38 are observed for a small mode volume MP with a diameter dc of 850 nm.
description: 4 pages, 3 figures
Comprehensive abundance analysis of red giants in the open clusters NGC 752, NGC 1817, NGC 2360 and NGC 2506
Creators: name: Reddy, Arumalla B. S.
name: Giridhar, Sunetra
name: Lambert, David L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have analyzed high-dispersion echelle spectra ($R \ga 50,000$) of red giant members for four open clusters to derive abundances for many elements. The spread in temperatures and gravities being very small among the red giants nearly the same stellar lines were employed thereby reducing the random errors. The errors of average abundance for the cluster were generally in 0.02 to 0.07 dex range. Our present sample covers galactocentric distances of 8.3 to 10.5 kpc. The [Fe/H] values are $-0.02\pm$0.05 for NGC 752, $-0.07\pm$0.06 for NGC 2360, $-0.11\pm$0.05 for NGC 1817 and $-0.19\pm$0.06 for NGC 2506. Abundances relative to Fe for elements from Na to Eu are equal within measurement uncertainties to published abundances for thin disk giants in the field. This supports the view that field stars come from disrupted open clusters.
description: 13 pages, 4 figures and 12 tables
The Palace Theatre: a case study in historic resource preservation
Creators: name: Dauncey, Lorri
Publisher: name: Environmental Design
Year: 1993
Subjects: subject: NA 109 C3 D37 1993
subject: Palace Theatre (Calgary, Alta.)
subject: Historic buildings - Alberta - Calgary - Conservation and restoration

description: Bibliography: p. 91-93.
description: The purpose of this Master's Degree Project (MDP) is to discuss the role of heritage resources in downtown revitalization using the Palace Theatre as a means of exploring the revitalization of Stephen Avenue Mall in Downtown Calgary. This project will determine how the Palace Theatre contributes to the sense of place of Stephen Avenue Mall and how to best preserve the theatre in order to attract more people to the Mall. The Palace Theatre is an important heritage resource on Stephen Avenue Mall in Downtown Calgary. Even vacant the theatre contributes to the sense of place of the Mall and in the Downtown. The Palace, as part of the historic downtown, was an important part of the physical, social, and emotional life of the Mall and Calgarians. With the preservation and reuse of the Palace, the theatre can once again play an active role on the Mall. This thesis determines that the best reuse option for the Palace Theatre would be to restore and renovate it as a road house/complex theatre. This use would be sympathetic to the building in terms of its architectural, historical, and urban context significance. In addition, the Palace would become important as both anchor and magnet on Stephen Avenue; as a road house/complex theatre it would attract development, people, and activity to the Mall. Increased tourism and visitation on Stephen Avenue will help to ensure the area's vitality; the restored Palace will be a crucial part of this revitalization. As a road house/complex theatre, the Palace would fulfill a community need for a 1500 seat facility, which is presently lacking. The theatre would become a major cultural amenity in Downtown Calgary. With proper planning and implementation, the Palace Theatre will not only be preserved and reused but it can also play a major role in the revitalization of Stephen Avenue Mall in Downtown Calgary.
title: Einsatz von Blockchain Technologie im Supply Chain Management
Creators: name: Perner, Mario
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2025
Subjects: subject: 658 Allgemeines Management

description: Diese Arbeit untersucht die Integration der Blockchain-Technologie in das Supply Chain Management (SCM). Sie gibt zunächst einen Überblick über die grundlegenden Konzepte der Blockchain, darunter digitale Signaturen, Hash-Funktionen und die allgemeine Funktionsweise von Blockchain-Systemen. Darüber hinaus werden wichtige Aspekte des SCM vorgestellt, wie Beschaffung, Produktion, Bestandsverwaltung, Logistik und Vertrieb. Die Forschung untersucht die potenziellen Vorteile von Blockchain im SCM und hebt Verbesserungen bei Transparenz, Rückverfolgbarkeit, Betrugsreduzierung, Effizienz durch Automatisierung und Smart Contracts, Kostensenkung, Transaktionsgeschwindigkeit und Anpassungsfähigkeit hervor. Die Arbeit befasst sich jedoch auch mit erheblichen Herausforderungen, da-runter Akzeptanz bei den Stakeholdern, Entwicklungs- und Betriebskosten, technische Komplexität, Systemintegration, Interoperabilität, Sicherheit, Datenschutz und regulatorische Fragen. Es wird eine empirische Studie auf der Grundlage von Experteninterviews durchgeführt, um die theoretischen Erkenntnisse mit Branchenperspektiven zu vergleichen. Das Gesamtziel besteht darin, ein umfassendes Verständnis der Vorteile und Herausforderungen der Blockchain-Integration in SCM zu vermitteln und dabei sowohl Erkenntnisse aus der Literatur als auch aus empirischen Beweisen zu nutzen.
description: This thesis explores the integration of blockchain technology into supply chain management (SCM). It begins by providing an overview of the fundamental concepts of blockchain, including digital signatures, hash functions, and the overall functioning of blockchain systems. Addition-ally, it introduces key aspects of SCM, such as procurement, production, inventory management, logistics, and distribution. The research investigates the potential benefits of blockchain in SCM, highlighting improvements in transparency, traceability, fraud reduction, efficiency through automation and smart contracts, cost reduction, transaction speed, and adaptability. However, the thesis also ad-dresses significant challenges, including stakeholder acceptance, development and operational costs, technical complexity, system integration, interoperability, security, data privacy, and regulatory issues. An empirical study based on expert interviews is conducted to compare the theoretical findings with industry perspectives. The overall objective is to provide a comprehensive understanding of the benefits and challenges of blockchain integration in SCM, drawing insights from both literature and empirical evidence.
Nonlinear optical properties in a quantum well with the hyperbolic confinement potential
Creators: name: Chen, Tairong
name: Xie, Wenfang
name: Liang, Shijun
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have performed theoretical calculation of the nonlinear optical properties in a quantum well (QW) with the hyperbolic confinement potential. Calculation results reveal that the transition energy, oscillator strength, second-order nonlinear optical rectification (OR), geometric factor and nonlinear optical absorption (OA) are strongly affected by the parameters ($α, σ$) of the hyperbolic confinement potential. And an increment of the parameter $α$ reduces all these physical quantities, while an increment of the parameter $σ$ enhances them, but not for geometric factor. In addition, it is found that one can control the optical properties of QW by tuning these parameters.
description: 16pages,6 figures,Accepted for publication in Physica B
Characterization of terminal oxidase expression in Bacillus subtilis
Creators: name: David, Pamela Susan
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: QR 82.2 B3 D38 1993
subject: Bacillus subtilis
subject: Cytochrome oxidase
subject: Oxidases
subject: Mitochondrial DNA
subject: Phosphorylation

description: Bibliography: p. 92-97.
Heavy oil recovery by electromagnetic heating and gas injection
Creators: name: Hu, Yunfeng
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: TN 871 H695 1994
subject: Thermal oil recovery
subject: Oil wells - Gas lift
subject: Oil reservoir engineering
subject: Injection wells

description: Bibliography: p. 78-85.
description: Experiments were carried out to determine the effectiveness of electromagnetic heating on heavy oil recovery from thin pay zones (< 10 m) typically found in Alberta and Saskatchewan. Higher electromagnetic frequencies were found to provide faster heating rate and can overcome problems associated with discontinuity of the media through which electromagnetic waves must propagate in the reservoir. Heat loss can also be minimized with the use of higher frequencies. For moderate heavy oil reservoirs (less than 1,000 mPa.s), it is not necessary to heat the entire pay zone. Heating of the wellbore vicinity is sufficient. Recovery can be improved further by gas injection. Oil recovery as high as 45% of OOIP (Original Oil in Place) was achieved using electromagnetic heating and gas injection compared to estimated primary recovery rates of less than 5%. The results obtained in this work clearly show that electromagnetic heating provides an effective mean of recovering heavy oil from reservoir with thin pay zones.
Spin dynamics in interacting semiconductor quantum dots
Creators: name: Fischer, Andreas
Publisher: name: TU Dortmund
Year: 2022
Subjects: subject: Condensed matter theory
subject: Spin dynamics
subject: Quantum dots
subject: Central spin model
subject: Semiclassical approach
subject: 530
subject: Kondensierte Materie
subject: Spindynamik
subject: Quantenpunkt

description: We study the spin dynamics in an ensemble of singly charged semiconductor quantum dots. The spin of the confined charge carriers can be polarized by coherent laser pulses. Due to the strong localization of the charge carrier, the hyperfine interaction with the local nuclear spin bath is the main contribution to the electron spin decoherence. Two-color pump-probe experiments indicate a coherent long-ranged interaction between the electron spins in different quantum dots. In this thesis, we develop a semiclassical approach based on spin-coherent states that allows for the efficient simulation of large spin systems and in addition preserves quantum mechanical properties on the level of single spins. We extend the semiclassical approach to open quantum systems using a quantum jump approach. We perform an in-depth analysis of the coherent optical manipulation of an interacting quantum dot ensemble employing pulse sequences with tailored spectra. Moreover, we study the cross-correlation spectra of second and fourth order to obtain complementary information about the spin system. Finally, we examine the intertwined dynamics of the electron spin and the nuclear spins at low temperatures to study the formation of a highly correlated nuclear-spin polaron state.
State-Based Promise Programs: The Intersection of State Policy and Low-Income Students' Relationships with Institutional Agents
Creators: name: Ashcraft, Michelle L
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Education policy
Higher education
Secondary education

description:
 This three-paper dissertation focuses on state-based promise programs, specifically the intersection of state financial aid policy and promise program scholarship recipients’ relationships with institutional agents. Gaps exist in the literature on promise programs, particularly pertaining to legal research and specific eligibility and renewal criteria, such as the requirement to participate in mentoring programs. Thus, this dissertation will include: (a) a historical law review on Indiana’s 21st Century Scholars program, highlighting recent criteria for a College Scholar Success Program including a mentoring requirement; (b) a current legislative review of mentoring requirements in eligibility and renewal criteria for state-based promise programs; and (c) a scoping review of the literature on mentoring in promise programs to inform future research, policy, and practice. The intended audiences for the research are state policymakers, state governing boards for postsecondary education, PK-16 educational institutions, and practitioners in education, government, philanthropy, business, and non-profits. This dissertation will answer the following research questions: (a) What historical legislative precedence of the Indiana 21st Century Scholars program led to a mentorship requirement in a College Scholar Success Program? (b) How does the Indiana legislation regarding a postsecondary mentorship requirement compare or contrast to mentoring-related eligibility and renewal criteria for other state-based promise program scholarships across the United States? (c) What types of support do state-based promise program mentors provide their mentees? (d) What roles do state-based promise program mentors fulfill when supporting their mentees?
On one-point metrizable extensions of locally compact metrizable spaces
Creators: name: Koushesh, M. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54D35, 54E45, 54E35, 54A25

description: For a non-compact metrizable space $X$, let ${\mathcal E}(X)$ be the set of all one-point metrizable extensions of $X$, and when $X$ is locally compact, let ${\mathcal E}_K(X)$ denote the set of all locally compact elements of ${\mathcal E}(X)$ and $λ: {\mathcal E}(X)\rightarrow{\mathcal Z}(βX\backslash X)$ be the order-anti-isomorphism (onto its image) defined in: [HJW] M. Henriksen, L. Janos and R.G. Woods, Properties of one-point completions of a non-compact metrizable space, Comment. Math. Univ. Carolinae 46 (2005), 105-123. By definition $λ(Y)= \bigcap_{n
description: 29 pages
Neutrino emissivity of $^{3}P_{2}$-$^{3}F_{2}$ superfluid cores in neutron stars
Creators: name: Leinson, L. B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The influence of the admixture of the $^{3}F_{2}$ state onto collective spin oscillations and neutrino emission processes in the triplet superfluid neutron liquid is studied in the BCS approximation. The eigen mode of spin oscillations with $ω\simeq\sqrt{58/35}Δ$ is predicted to exist in the triplet superfluid neutron condensate besides the already known mode $ω\simeqΔ/\sqrt{5}$. Excitation of the high-frequency spin oscillations in the condensate occurs through the tensor interactions between quasiparticles. Neutrino energy losses through neutral weak currents are found to consist of three separate contributions caused by a recombination of broken Cooper pairs and by weak decays of the collective modes of spin oscillations. Neutrino decays of the low-frequency spin waves can play an important role in the cooling scenario of neutron stars. Weak decays of the high-frequency oscillations that occur only if the tensor forces are taken into account in the pairing interactions does not modify substantially the total energy losses. Simple expressions are suggested for the total neutrino emissivity.
description: 27 pages, 3 figures
The effect of anthelmintic therapy on the reproductive performance and productivity of pregnant beef heifers
Creators: name: Jacobsen, Johnny Alan
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: RM 356 J33 1993
subject: Anthelmintics
subject: Gastrointestinal agents
subject: Antiparasitic agents
subject: Cattle - Parasites - Biological control

description: Bibliography: p. 50-52.
Nonequilibrium nuclear spin states in singly charged semiconductor quantum dots
Creators: name: Kleinjohann, Iris
Publisher: name: TU Dortmund
Year: 2022
Subjects: subject: Condensed matter theory
subject: Quantum dot
subject: Spin dynamics
subject: Central spin model
subject: Nonequilibrium
subject: 530
subject: Kondensierte Materie
subject: Quantenpunkt
subject: Spindynamik
subject: Nichtgleichgewicht

description: The spin of a localized charge carrier in a semiconductor nanostructure can be coherently controlled by external electromagnetic fields. At cryogenic temperatures, the spin coherence time is limited by the hyperfine interaction with surrounding nuclear spins. The generation of tailored nuclear spin states, however, may drastically increase the electron spin coherence in comparison to the disordered nuclear spin system. By means of a fully quantum mechanical description, we investigate two particular nonequilibrium situations in which a highly ordered nuclear spin state is achieved. First, we focus on the formation of the nuclear-spin polaron state under optical cooling of the nuclear spins. Kinetic rate equations are developed that account for different effective spin temperatures of the charge carrier and the nuclei and provide analytical access to the crossover temperature of the polaron formation. The rate equations are generalized to a Lindblad formalism enabling the numerical investigation of a cooled system with arbitrary anisotropic hyperfine interaction. The second nonequilibrium situation addressed in this thesis is the periodic optical excitation of singly charged quantum dots subject to a transversal magnetic field. Nuclei-induced frequency focusing of the electron spin precession leads to mode-locked spin dynamics. A revival of the electron spin polarization directly before each pump pulse reflects this synchronization of the spin dynamics to the pumping periodicity. In experiments, a magnetic field dependence of the emerging revival amplitude is observed. Our quantum mechanical approach allows for attributing this dependence to the nuclear Zeeman term. Moreover, we discuss various additional influences on the mode-locking effect. We examine the effect of static nuclear-electric quadrupolar interactions, the characteristics of the laser pulses, and the choice of the pulse train.
Regulation of ethylene biosynthesis and its role in seed development in Brassica napus
Creators: name: Jayasekera, G. Anil (Gebalanage Anil), 1957-
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: QK 495 C9 J39 1993
subject: Brassica
subject: Seeds - Development
subject: Seeds - Testing
subject: Ethylene - Biosynthesis

description: Bibliography: p. 264-290.
Improvement of Data Analytics Techniques in Reflection High Energy Electron Diffraction to Enable Machine Learning
Creators: name: Gemperline, Patrick T.
name: Paudel, Rajendra
name: Vasudevan, Rama K.
name: Comes, Ryan B.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Perovskite oxides such as LaFeO$_3$ are a well-studied family of materials that possess a wide range of useful and novel properties. Successfully synthesizing perovskite oxide samples usually requires a significant number of growth attempts and a detailed film characterization on each sample to find the optimal growth window of a material. The most common real-time \textit{in situ} diagnostic technique available during molecular beam epitaxy (MBE) synthesis is reflection high-energy electron diffraction (RHEED). Conventional use of RHEED allows a highly experienced operator to determine growth rate by monitoring intensity osciallations and make some qualitative observations during growth, such as recognizing the sample has become amorphous or recognizing that large islands have formed on the surface. However, due to a lack of theoretical understanding of the diffraction patterns, finer, more precise levels of observations are challenging. To address these limitations, we implement new data analytics techniques in the growth of three LaFeO$_3$ samples on Nb-doped SrTiO$_3$ by MBE. These techniques improve our ability to perform unsupervised machine learning using principal component analysis (PCA) and k-means clustering by using drift correction to overcome sample or stage motion during growth and intensity transformations that highlight more subtle features in the images such as Kikuchi bands. With this approach, we enable the first demonstration of PCA and k-means across multiple samples, allowing for quantitative comparison of RHEED videos for two LaFeO$_3$ film samples. These capabilities set the stage for real-time processing of RHEED data during growth to enable machine learning-accelerated film synthesis.
description: 8 pages, 7 figures; Supplemental materials available on Zenodo at DOI: 10.5281/zenodo.14649215
Grain boundary interstitial segregation in substitutional binary alloys
Creators: name: Zhang, Zuoyong
name: Deng, Chuang
Publisher: name: arXiv
Year: 2025
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Grain boundary (GB) segregation is a powerful approach for optimizing the thermal and mechanical properties of metal alloys. In this study, we report significant GB interstitial segregation in a representative substitutional binary alloy system (Al-Ni) through atomistic simulations, challenging prevailing assumptions in the literature. Our findings show that Ni atoms preferentially segregate to interstitial sites within numerous kite-like GB structures in the Al bicrystals. An intriguing interplanar interstitial segregation pattern was also observed and analyzed. Additionally, interstitial segregation can induce unexpected GB transitions, such as kite transitions and nano-faceting, due to the existence of small interstitial sites. Building upon these observations, we developed a robust method to systematically identify the interstitial candidate sites for accommodating solutes at GBs. This approach combines site detection with structural filtering to produce distributions of interstitial sites that closely match atomistic simulation results. Applied to nanocrystalline alloys, this method enabled the calculation of interstitial segregation energies, significantly improving GB segregation predictions for the Al-Ni system. Furthermore, machine learning models using smooth overlap of atomic positions descriptors successfully predicted per-site interstitial segregation energy. This study highlights the critical role of GB interstitial segregation in advancing our understanding of solute behavior and provides valuable insights for designing next-generation alloys.
description: 36 pages and 11 figures for the main manuscript, 14 pages and 17 figures for supplemental
Effects of emulsifier, betaine and L-carnitine on growth performance, immune response, gut morphology and nutrient digestibility in broiler chickens exposed to cyclic heat stress
Creators: name: Yousefi, Jalal
name: Taherpour, Kamran
name: Ghasemi, Hossein Ali
name: Gharaei, Mohammad Akbari
name: Mohammadi, Yahya
name: Rostami, Farhad
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: 1. This experiment investigated the efficiency of varying doses of an emulsifier blend (EB; 0 and 1 g/kg of diet), betaine (BT; 0 and 1 g/kg of diet) and L-carnitine (CT; 0 and 0.5 g/kg of diet) in broilers subjected to circular heat stress (HS) conditions. 2. A total of 1080 one-day-old male broiler chickens (Ross 308) were randomly assigned to nine treatment groups (six pens/treatment with 20 birds/pen) in a completely randomised design. The thermoneutral control broiler chickens were housed at a comfortable temperature and fed a standard diet (no additives). The other 8 groups were exposed to cyclic HS conditions (34°C) for 8 h (10:00-18:00). 3. There were EB × BT × CT interactions for body weight (BW) at 24 d (P=0.038) and average daily gain (ADG) during the 10-24 d period (P=0.049), with the greatest values with concurrent supplementation of all three ingredients. 4. Inclusion of EB resulted in greater (P<0.05) BW, ADG, European performance index, uniformity rate, primary antibody titres against sheep red blood cells (SRBC), duodenal villus height (VH) and villus surface area, nitrogen-corrected apparent metabolisable energy (AMEn) and apparent ileal digestibility (AID) of dry matter, crude protein and fat, but lower (P<0.05) feed conversion ratio, mortality rate and heterophile to lymphocyte ratio. 5. Dietary BT supplementation improved (P<0.05) overall performance indicators, primary antibody titres against SRBC and Newcastle disease virus, serum total antioxidant capacity, duodenal VH, Jejunal VH/crypt depth, AID of dry matter and crude protein. The effect of dietary supplementation with CT was limited to an increase (P<0.05) in ADG (d 10-24) and a decrease (P<0.05) in serum malondialdehyde concentration (42 d) and jejunal crypt depth (42 d). 6. In conclusion, dietary supplementation of either EB or BT alone or in combination can ameliorate some of the detrimental effects of HS on growth performance, immunity and intestinal health in broilers, while a minor positive effect on performance and antioxidant status was observed with CT supplementation.
Supervised Learning in Multilayer Spiking Neural Networks
Creators: name: Sporea, Ioana
name: Grüning, André
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: The current article introduces a supervised learning algorithm for multilayer spiking neural networks. The algorithm presented here overcomes some limitations of existing learning algorithms as it can be applied to neurons firing multiple spikes and it can in principle be applied to any linearisable neuron model. The algorithm is applied successfully to various benchmarks, such as the XOR problem and the Iris data set, as well as complex classifications problems. The simulations also show the flexibility of this supervised learning algorithm which permits different encodings of the spike timing patterns, including precise spike trains encoding.
description: 38 pages, 4 figures
Nuclear magnetic resonance studies of phosvitin and peptides phosphorylated by protein kinases
Creators: name: Brockbank, Ronald Lawson
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: QP 552 P4 B73 1993
subject: Peptides
subject: Protein kinase
subject: Nuclear magnetic resonance spectroscopy
subject: Phosphorylation

description: Bibliography: p. 320-342.
A differential equations approach to $l_1$-minimization with applications to array imaging
Creators: name: Moscoso, Miguel
name: Novikov, Alexei
name: Papanicolaou, George
name: Ryzhik, Lenya
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present an ordinary differential equations approach to the analysis of algorithms for constructing $l_1$ minimizing solutions to underdetermined linear systems of full rank. It involves a relaxed minimization problem whose minimum is independent of the relaxation parameter. An advantage of using the ordinary differential equations is that energy methods can be used to prove convergence. The connection to the discrete algorithms is provided by the Crandall-Liggett theory of monotone nonlinear semigroups. We illustrate the effectiveness of the discrete optimization algorithm in some sparse array imaging problems.
The cosmic ray balloon experiment CRAYBEX
Creators: name: Lessard, R. W. (Rodney William)
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: QC 485 L595 1993
subject: Cosmic rays
subject: Scintillation spectrometry
subject: Particles (Nuclear physics)
subject: Nuclear Astrophysics

description: Bibliography: p. 82-85.
Connectivity percolation in suspensions of hard platelets
Creators: name: Mathew, Maneesh
name: Schilling, Tanja
name: Oettel, Martin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a study on connectivity percolation in suspensions of hard platelets by means of Monte Carlo simulation. We interpret our results using a contact-volume argument based on an effective single--particle cell model. It is commonly assumed that the percolation threshold of anisotropic objects scales as their inverse aspect ratio. While this rule has been shown to hold for rod-like particles, we find that for hard plate-like particles the percolation threshold is non-monotonic in the aspect ratio. It exhibits a shallow minimum at intermediate aspect ratios and then saturates to a constant value. This effect is caused by the isotropic-nematic transition pre-empting the percolation transition. Hence the common strategy to use highly anisotropic, conductive particles as fillers in composite materials in order to produce conduction at low filler concentration is expected to fail for plate-like fillers such as graphene and graphite nanoplatelets.
Enhancing synchronization in growing networks
Creators: name: Wang, Y.
name: Zeng, A.
name: Di, Z.
name: Fan, Y.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Most real systems are growing. In order to model the evolution of real systems, many growing network models have been proposed to reproduce some specific topology properties. As the structure strongly influences the network function, designing the function-aimed growing strategy is also a significant task with many potential applications. In this letter, we focus on synchronization in the growing networks. In order to enhance the synchronizability during the network evolution, we propose the Spectral-Based Growing (SBG) strategy. Based on the linear stability analysis of synchronization, we show that our growing mechanism yields better synchronizability than the existing topology-aimed growing strategies in both artificial and real-world networks. We also observe that there is an optimal degree of new added nodes, which means adding nodes with neither too large nor too low degree could enhance the synchronizability. Furthermore, some topology measurements are considered in the resultant networks. The results show that the degree, node betweenness centrality from SBG strategy are more homogenous than those from other growing strategies. Our work highlights the importance of the function-aimed growth of the networks and deepens our understanding of it.
Anomalous critical behaviour in the polymer collapse transition of three-dimensional lattice trails
Creators: name: Bedini, Andrea
name: Owczarek, Aleksander L
name: Prellberg, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Trails (bond-avoiding walks) provide an alternative lattice model of polymers to self-avoiding walks, and adding self-interaction at multiply visited sites gives a model of polymer collapse. Recently, a two-dimensional model (triangular lattice) where doubly and triply visited sites are given different weights was shown to display a rich phase diagram with first and second order collapse separated by a multi-critical point. A kinetic growth process of trails (KGT) was conjectured to map precisely to this multi-critical point. Two types of low temperature phases, globule and crystal-like, were encountered. Here, we investigate the collapse properties of a similar extended model of interacting lattice trails on the simple cubic lattice with separate weights for doubly and triply visited sites. Again we find first and second order collapse transitions dependent on the relative sizes of the doubly and triply visited energies. However we find no evidence of a low temperature crystal-like phase with only the globular phase in existence. Intriguingly, when the ratio of the energies is precisely that which separates the first order from the second-order regions anomalous finite-sized scaling appears. At the finite size location of the rounded transition clear evidence exists for a first order transition that persists in the thermodynamic limit. This location moves as the length increases, with its limit apparently at the point that maps to a KGT. However, if one fixes the temperature to sit at exactly this KGT point then only a critical point can be deduced from the data. The resolution of this apparent contradiction lies in the breaking of crossover scaling and the difference in the shift and transition width (crossover) exponents.
description: 11 pages, 14 figures
Nonlinear optomechanical systems with quasi-periodic and chaotic dynamics
Creators: name: Saiko, A. P.
name: Rusetsky, G. A.
name: Markevich, S. A.
name: Fedaruk, R.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Model optomechanical systems with photon-vibration interactions linear, quadratic, and cubic in mechanical displacements are studied under conditions for adiabatic elimination of the photon field. The opportunity of transformation of effective potential describing the dynamics of the mechanical resonator from single-well to double-well is demonstrated. The dynamics of the mechanical resonator is considered in the presence of (i) only linear interaction, (ii) only quadratic interaction, (iii) both linear and quadratic interactions, and (iv) all three interactions, while other parameters of the optomechanical system, the modulation optical field, and the initial conditions remain fixed. Quasiperiodic oscillations of the mechanical resonator in the case (i) are replaced by chaotic ones when the cases (ii) or (iii) are realized. It is interesting that in the presence of all three interactions, the chaotic behavior of the mechanical oscillator becomes quasi-periodic. However, increasing the power of the modulation field again leads to chaos.
description: 6 pages, 6 figures
A comparative study of the electronic and magnetic properties of BaFe_2As_2 and BaMn_2As_2 using the Gutzwiller approximation
Creators: name: Yao, Y. X.
name: Schmalian, J.
name: Wang, C. Z.
name: Ho, K. M.
name: Kotliar, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: To elucidate the role played by the transition metal ion in the pnictide materials, we compare the electronic and magnetic properties of BaFe_{2}As_{2} with BaMn_{2}As_{2}. To this end we employ the LDA+Gutzwiller method to analyze the mass renormalizations and the size of the ordered magnetic moment of the two systems. We study a model that contains all five transition metal 3d orbitals together with the Ba-5d and As-4p states (ddp-model) and compare these results with a downfolded model that consists of Fe/Mn d-states only (d-model). Electronic correlations are treated using the multiband Gutzwiller approximation. The paramagnetic phase has also been investigated using LDA+Gutzwiller method with electron density self-consistency. The renormalization factors for the correlated Mn 3d orbitals in the paramagnetic phase of BaMn_{2}As_{2} are shown to be generally smaller than those of BaFe_{2}As_{2}, which indicates that BaMn_{2}As_{2} has stronger electron correlation effect than BaFe_{2}As_{2}. The screening effect of the main As 4p electrons to the correlated Fe/Mn 3d electrons is evident by the systematic shift of the results to larger Hund's rule coupling J side from the ddp-model compared with those from the d-model. A gradual transition from paramagnetic state to the antiferromagnetic ground state with increasing J is obtained for the models of BaFe_{2}As_{2} which has a small experimental magnetic moment; while a rather sharp jump occurs for the models of BaMn_{2}As_{2}, which has a large experimental magnetic moment. The key difference between the two systems is shown to be the d-level occupation. BaMn_{2}As_{2}, with approximately five d-electrons per Mn atom, is for same values of the electron correlations closer to the transition to a Mott insulating state than BaFe_{2}As_{2}. Here an orbitally selective transition, required for a system with close to six electrons only occurs at significantly larger values for the Coulomb interactions.
Cowboys, farmers, and Indians: dialectics in Alberta vernacular verse
Creators: name: Lyon, George Wellington
Publisher: name: University of Calgary
Year: 1993
Subjects: subject: PS 8159.5 A43 L96 1993
subject: Canadian poetry (English) - Alberta
subject: Cowboys in literature
subject: Indians in literature
subject: Farmers in literature
subject: Folklore - Alberta

description: Bibliography: p. 336-365.
The NLO N =4 SUSY BFKL Green function in the adjoint representation
Creators: name: Chachamis, G.
name: Vera, A. Sabio
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the solution of the BFKL equation in the adjoint representation for the N=4 SUSY theory at NLO accuracy. Consistency with the large momentum transfer solution obtained by Fadin and Lipatov is found. We investigate, for large and small values of the momentum transfer, the growth with energy of the Green function, its collinear behaviour and the expansion in azimuthal angle Fourier components.
description: 7 pages, 4 figures
Formation of the current sheet in a coronal streamer
Creators: name: Abbo, Lucia
name: Antonucci, Ester
name: Lionello, Roberto
name: Mikić, Zoran
name: Riley, Pete
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The present work is on the study of a coronal streamer observed in March 2008 at high spectral and spatial resolution by the Ultraviolet Coronagraph Spectrometer (UVCS) onboard SOHO. On the basis of a spectroscopic analysis of the O VI doublet, the solar wind plasma parameters are inferred in the extended corona. The analysis accounts for the coronal magnetic topology, extrapolated through a 3D magneto-hydrodynamic model. The results of the analysis show indications on the formation of the current sheet, one of the source regions of the slow coronal wind.
description: 6 pages, 3 figures, Proceeding of the "International Association of Geomagnetism and Aeronomy (IAGA) 2nd Symposium: Solar Wind - Space Environment Interaction", December 4th-8th, 2009, Cairo, Egypt
A survey of the type and level of social service activity of religious institutions in the city of Calgary
Creators: name: Matheson, Marjorie Ann
Publisher: name: Social Work
Year: 1993
Subjects: subject: HN 39 C2 M38 1993
subject: Church and social problems - Alberta - Calgary
subject: Social service - Alberta - Calgary - Religious aspects

description: Bibliography: p. 116-126.
Large-scale 3D MHD simulation on the solar flux emergence and the small-scale dynamic features in an active region
Creators: name: Toriumi, S.
name: Yokoyama, T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have performed a three-dimensional magnetohydrodynamic simulation to study the emergence of a twisted magnetic flux tube from -20,000 km of the solar convection zone to the corona through the photosphere and the chromosphere. The middle part of the initial tube is endowed with a density deficit to instigate a buoyant emergence. As the tube approaches the surface, it extends horizontally and makes a flat magnetic structure due to the photosphere ahead of the tube. Further emergence to the corona breaks out via the interchange-mode instability of the photospheric fields, and eventually several magnetic domes build up above the surface. What is new in this three-dimensional experiment is, multiple separation events of the vertical magnetic elements are observed in the photospheric magnetogram, and they reflect the interchange instability. Separated elements are found to gather at the edges of the active region. These gathered elements then show shearing motions. These characteristics are highly reminiscent of active region observations. On the basis of the simulation results above, we propose a theoretical picture of the flux emergence and the formation of an active region that explains the observational features, such as multiple separations of faculae and the shearing motion.
description: 12 pages, 7 figures, 1 table, accepted to A&A
Emotional persistence in online chatting communities
Creators: name: Garas, Antonios
name: Garcia, David
name: Skowron, Marcin
name: Schweitzer, Frank
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: How do users behave in online chatrooms, where they instantaneously read and write posts? We analyzed about 2.5 million posts covering various topics in Internet relay channels, and found that user activity patterns follow known power-law and stretched exponential distributions, indicating that online chat activity is not different from other forms of communication. Analysing the emotional expressions (positive, negative, neutral) of users, we revealed a remarkable persistence both for individual users and channels. I.e. despite their anonymity, users tend to follow social norms in repeated interactions in online chats, which results in a specific emotional "tone" of the channels. We provide an agent-based model of emotional interaction, which recovers qualitatively both the activity patterns in chatrooms and the emotional persistence of users and channels. While our assumptions about agent's emotional expressions are rooted in psychology, the model allows to test different hypothesis regarding their emotional impact in online communication.
description: 34 pages, 4 main and 12 supplementary figures
Vacuum as a hyperbolic metamaterial
Creators: name: Smolyaninov, Igor I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: As demonstrated by Chernodub, vacuum in a strong magnetic field behaves as a periodic Abrikosov vortex lattice in a type-II superconductor. We investigate electromagnetic behavior of vacuum in this state. Since superconductivity is realized along the axis of magnetic field only, strong anisotropy of the vacuum dielectric tensor is observed. The diagonal components of the tensor are positive in the x and y directions perpendicular to the magnetic field, and negative in the z direction along the field. As a result, vacuum behaves as a hyperbolic metamaterial medium. If the magnetic field is constant, low frequency extraordinary photons experience this medium as a (3+1) Minkowski spacetime in which the role of time is played by the spatial z coordinate. Spatial variations of the magnetic field curve this effective spacetime, and may lead to formation of "event horizons", which are analogous to electromagnetic black holes in hyperbolic metamaterials. We also note that hyperbolic metamaterials behave as diffractionless "perfect lenses". Since large enough magnetic fields probably had arisen in the course of evolution of early Universe, the demonstrated hyperbolic behavior of early vacuum may have imprints in the large scale structure of the present-day Universe.
description: 10 pages, 1 figure
The Numerical Simulation of General Relativistic Shock Waves by a Locally Inertial Godunov Method Featuring Dynamical Time Dilation
Creators: name: Vogler, Zeke
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce what we call a locally inertial Godunov method with dynamical time dilation, and use it to simulate a new one parameter family of general relativistic shock wave solutions of the Einstein equations for a perfect fluid. The forward time solutions resolve the secondary reflected wave (an incoming shock wave) in the Smoller-Temple shock wave model for an explosion into a static singular isothermal sphere. The backward time solutions indicate black hole formation from a smooth underlying solution via collapse associated with an incoming rarefaction wave. As far as we know, this is the first numerical simulation of a fluid dynamical shock wave in general relativity.
Probing Standard Model and Beyond with Reactor CE$ν$NS Data of CONUS+ experiment
Creators: name: Chattaraj, Ayan
name: Majumdar, Anirban
name: Srivastava, Rahul
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We explore the potential of reactor antineutrino-induced Coherent Elastic Neutrino-Nucleus Scattering (CE$ν$NS) data from the CONUS+ experiment to investigate both the Standard Model (SM) and Beyond Standard Model (BSM) scenarios. Alongside CE$ν$NS, Elastic Neutrino-Electron Scattering (E$ν$ES) events are also included in our analysis, enabling more stringent constraints on new physics. Within the SM, we examine the weak mixing angle as a precision test of the electroweak sector. For BSM scenarios, we constrain the parameter space of light mediators arising from neutrino generalized interactions (NGI), while also setting limits on the electromagnetic properties of neutrinos, including their charge radius, millicharge, and magnetic moment.
description: 18 pages, 7 figures, 3 tables, V3: analysis updated based on the latest data release from the CONUS+ Collaboration, main conclusions remain unchanged, matches published version in PLB