cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Integrating Learning from Examples into the Search for Diagnostic Policies
Creators: name: Bayer-Zubek, V.
name: Dietterich, T. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper studies the problem of learning diagnostic policies from training examples. A diagnostic policy is a complete description of the decision-making actions of a diagnostician (i.e., tests followed by a diagnostic decision) for all possible combinations of test results. An optimal diagnostic policy is one that minimizes the expected total cost, which is the sum of measurement costs and misdiagnosis costs. In most diagnostic settings, there is a tradeoff between these two kinds of costs. This paper formalizes diagnostic decision making as a Markov Decision Process (MDP). The paper introduces a new family of systematic search algorithms based on the AO* algorithm to solve this MDP. To make AO* efficient, the paper describes an admissible heuristic that enables AO* to prune large parts of the search space. The paper also introduces several greedy algorithms including some improvements over previously-published methods. The paper then addresses the question of learning diagnostic policies from examples. When the probabilities of diseases and test results are computed from training data, there is a great danger of overfitting. To reduce overfitting, regularizers are integrated into the search algorithms. Finally, the paper compares the proposed methods on five benchmark diagnostic data sets. The studies show that in most cases the systematic search methods produce better diagnostic policies than the greedy methods. In addition, the studies show that for training sets of realistic size, the systematic search algorithms are practical on todays desktop computers.
Petrology of the McCartys lava flow sequence, Zuni-Bandera volcanic field, New Mexico
Creators: name: Kolisnik, Angela M.E.
Publisher: name: University of Calgary
Year: 1997
Subjects: subject: QE462 .O43 K65 1997A
subject: Additonal Copy: QE462 .O43 K65 1997 in the Gallagher Library of Geology and Geophysics
subject: Olivinite
subject: Petrology - New Mexico
subject: Geochemistry
subject: FOS: Earth and related environmental sciences
subject: Rocks, Igneous

description: Bibliography: p. 155-161
Sexual harassment: sociocultural aspects and organizational policy interventions
Creators: name: Spence, Renee A.
Publisher: name: University of Calgary
Year: 1997
Subjects: subject: LC212.863 .C33 S64 1997
subject: Additonal Copy: 370 EDC 1997 SPE in the Doucette Education Library.
subject: Sexual harassment in universities and colleges - Alberta - Calgary

description: Bibliography: p. 139-146
The availability of contraceptive methods in Turkish pharmacies and the status of pharmacies and pharmacists as providers of contraception
Creators: name: Ozaydin, Ayse Nilufer
name: Bozdogan, Berk
name: Kici, Nergis
name: Ozaydin, Fuat Nihat
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: We aimed to assess pharmacists’ contraceptive knowledge and evaluate the contraceptives requested and sold in pharmacies. A descriptive study was carried out in October 2016 in cooperation with the Chamber of Pharmacists of Istanbul Province, Turkey. Data were collected by questionnaire, and pharmacists’ total knowledge scores were calculated. The study comprised 101 participants, 86.1% of whom were women. Combined oral contraceptives were the most requested (97.0%) and supplied (94.1%) contraceptive method. The mean total knowledge score of pharmacists was 51.6 ± 12.9 (median 54.0, range 14.0–72.0). Among pharmacists, 51.5% said they had never received any training about contraception. The results showed that pharmacists providing contraceptive counselling services need continuing in-service training. The current regulations on the duties and responsibilities of pharmacists in Turkey involve the provision of counselling about medication use. Effective training is suggested to provide better quality services in family planning/reproductive health care.
The variation in the use of I-CASE toolsets: a grounded theory approach
Creators: name: Hawat, Prachit
Publisher: name: University of Calgary
Year: 1998
Subjects: subject: QA76.758 .H38 1998
subject: Additional Copy: QA76.758 .H38 1998 in the MGMT-REF
subject: Computer-aided software engineering
subject: Computer programming management

description: Bibliography: p. 201-214
Variability in traditional and non-traditional inuit architecture, AD 1000 to present
Creators: name: Dawson, Peter Colin
Publisher: name: University of Calgary
Year: 1997
Subjects: subject: E99 .E7 D385 1997
subject: Inuit--Dwellings.
subject: Dwellings--Arctic regions.
subject: Inuit--Urban residence.

description: Bibliography: p. 286-317
Atomic Parity Violation. Early days, present results, prospects
Creators: name: Bouchiat, Marie-Anne
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This is a personal recollection of the time when the search for APV was beginning. In spite of today's remarkable results, summarized here, there are still important goals to be achieved. I indicate a possible way to tackle the remaining experimental challenges, by adapting methods now of frequent use in precision metrology.
description: 7 pages, 4 figures, submitted to Il Nuovo Cimento C (PAVI 2011 conference proceedings)
CAN-PINN: A Fast Physics-Informed Neural Network Based on Coupled-Automatic-Numerical Differentiation Method
Creators: name: Chiu, Pao-Hsiung
name: Wong, Jian Cheng
name: Ooi, Chinchun
name: Dao, My Ha
name: Ong, Yew-Soon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this study, novel physics-informed neural network (PINN) methods for coupling neighboring support points and their derivative terms which are obtained by automatic differentiation (AD), are proposed to allow efficient training with improved accuracy. The computation of differential operators required for PINNs loss evaluation at collocation points are conventionally obtained via AD. Although AD has the advantage of being able to compute the exact gradients at any point, such PINNs can only achieve high accuracies with large numbers of collocation points, otherwise they are prone to optimizing towards unphysical solution. To make PINN training fast, the dual ideas of using numerical differentiation (ND)-inspired method and coupling it with AD are employed to define the loss function. The ND-based formulation for training loss can strongly link neighboring collocation points to enable efficient training in sparse sample regimes, but its accuracy is restricted by the interpolation scheme. The proposed coupled-automatic-numerical differentiation framework, labeled as can-PINN, unifies the advantages of AD and ND, providing more robust and efficient training than AD-based PINNs, while further improving accuracy by up to 1-2 orders of magnitude relative to ND-based PINNs. For a proof-of-concept demonstration of this can-scheme to fluid dynamic problems, two numerical-inspired instantiations of can-PINN schemes for the convection and pressure gradient terms were derived to solve the incompressible Navier-Stokes (N-S) equations. The superior performance of can-PINNs is demonstrated on several challenging problems, including the flow mixing phenomena, lid driven flow in a cavity, and channel flow over a backward facing step. The results reveal that for challenging problems like these, can-PINNs can consistently achieve very good accuracy whereas conventional AD-based PINNs fail.
description: 25 pages, 20 figures
Three New Eclipsing White-dwarf - M-dwarf Binaries Discovered in a Search for Transiting Planets Around M-dwarfs
Creators: name: Law, Nicholas M.
name: Kraus, Adam L.
name: Street, Rachel
name: Fulton, Benjamin J.
name: Hillenbrand, Lynne A.
name: Shporer, Avi
name: Lister, Tim
name: Baranec, Christoph
name: Bloom, Joshua S.
name: Bui, Khanh
name: Burse, Mahesh P.
name: Cenko, S. Bradley
name: Das, H. K.
name: Davis, Jack. T. C.
name: Dekany, Richard G.
name: Filippenko, Alexei V.
name: Kasliwal, Mansi M.
name: Kulkarni, S. R.
name: Nugent, Peter
name: Ofek, Eran O.
name: Poznanski, Dovi
name: Quimby, Robert M.
name: Ramaprakash, A. N.
name: Riddle, Reed
name: Silverman, Jeffrey M.
name: Sivanandam, Suresh
name: Tendulkar, Shriharsh
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present three new eclipsing white-dwarf / M-dwarf binary systems discovered during a search for transiting planets around M-dwarfs. Unlike most known eclipsing systems of this type, the optical and infrared emission is dominated by the M-dwarf components, and the systems have optical colors and discovery light curves consistent with being Jupiter-radius transiting planets around early M-dwarfs. We detail the PTF/M-dwarf transiting planet survey, part of the Palomar Transient Factory (PTF). We present a Graphics Processing Unit (GPU)-based box-least-squares search for transits that runs approximately 8X faster than similar algorithms implemented on general purpose systems. For the discovered systems, we decompose low-resolution spectra of the systems into white-dwarf and M-dwarf components, and use radial velocity measurements and cooling models to estimate masses and radii for the white dwarfs. The systems are compact, with periods between 0.35 and 0.45 days and semimajor axes of approximately 2 solar radii (0.01 AU). We use the Robo-AO laser guide star adaptive optics system to tentatively identify one of the objects as a triple system. We also use high-cadence photometry to put an upper limit on the white dwarf radius of 0.025 solar radii (95% confidence) in one of the systems. We estimate that 0.08% (90% confidence) of M-dwarfs are in these short-period, post-common-envelope white-dwarf / M-dwarf binaries where the optical light is dominated by the M-dwarf. Similar eclipsing binary systems can have arbitrarily small eclipse depths in red bands and generate plausible small-planet-transit light curves. As such, these systems are a source of false positives for M-dwarf transiting planet searches. We present several ways to rapidly distinguish these binaries from transiting planet systems.
description: 14 pages, 14 figures, submitted to ApJ
Women’s experiences of accessing postpartum intrauterine contraception in a public maternity setting: a qualitative service evaluation
Creators: name: Boydell, Nicola
name: Cooper, Michelle
name: Cameron, Sharon T.
name: Glasier, Anna
name: Coutts, Shiona
name: McGuire, Frances
name: Harden, Jeni
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: The aims of the study were to explore women’s experiences of an immediate postpartum intrauterine contraception (PPIUC) service recently introduced in a UK maternity setting, to identify areas for improvement and inform service provision. Qualitative research was carried out in hospital and community maternity services in Lothian, UK. In-depth interviews were conducted with 35 women who had received PPIUC at vaginal or caesarean delivery. The interview data were analysed thematically to explore the women’s experiences of PPIUC service provision. Women’s decisions to choose PPIUC were influenced by their perception of intrauterine contraception (IUC) as a suitable and effective method and the convenience of immediate postpartum insertion. Most women were satisfied with their experience of PPIUC. Women delivering vaginally sometimes reported concerns about delays to insertion, particularly where they perceived a lack of communication from staff about when and where insertion would occur. PPIUC information was described as being difficult to absorb in the context of ante/postnatal information overload. Those receiving PPIUC at caesarean delivery sometimes expressed concerns about what post-insertion support might be available in primary care. Women typically reported satisfaction with their decision to have PPIUC. For maternity services considering introducing PPIUC, our findings reinforce the importance of anticipating and addressing implementation challenges in order to enhance women’s experience of the service. These include ensuring that: clear and appropriate PPIUC information and support are provided antenatally; women are able to access PPIUC immediately after delivery; robust clinical pathways are in place to support post-insertion IUC care; and both staff and women are familiar with the clinical pathways.
Is N-doped SrO magnetic? A first-principles view
Creators: name: Wu, Hua
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: N-doped SrO seems to be one of the model systems for d^0 magnetism, in which magnetism (or ideally, ferromagnetism) was ascribed to the localized N 2p spins mediated by delocalized O 2p holes. Here we offer a different view, using density functional calculations. We find that N-doped SrO with solely substitutional N impurities as widely assumed in the literature is unstable, and instead that a pairing state of substitutional and interstitial N impurities is significantly more stable and has a much lower formation energy than the former by 6.7 eV. The stable (N_{sub}-N_{int})^{2-} dimers behave like a charged (N_2)^{2-} molecule and have each a molecular spin=1. However, their spin-polarized molecular levels lie well inside the wide band gap of SrO and thus the exchange interaction is negligibly weak. As a consequence, N-doped SrO could not be ferromagnetic but paramagnetic.
description: 7 pages, 2 figures, Appl. Phys. Lett., in press
Controlling Curie temperature in (Ga,Ms)As through location of the Fermi level within the impurity band
Creators: name: Dobrowolska, M.
name: Tivakornsasithorn, K.
name: Liu, X.
name: Furdyna, J. K.
name: Berciu, M.
name: Yu, K. M.
name: Walukiewicz, W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The ferromagnetic semiconductor (Ga,Mn)As has emerged as the most studied material for prototype applications in semiconductor spintronics. Because ferromagnetism in (Ga,Mn)As is hole-mediated, the nature of the hole states has direct and crucial bearing on its Curie temperature TC. It is vigorously debated, however, whether holes in (Ga,Mn)As reside in the valence band or in an impurity band. In this paper we combine results of channeling experiments, which measure the concentrations both of Mn ions and of holes relevant to the ferromagnetic order, with magnetization, transport, and magneto-optical data to address this issue. Taken together, these measurements provide strong evidence that it is the location of the Fermi level within the impurity band that determines TC through determining the degree of hole localization. This finding differs drastically from the often accepted view that TC is controlled by valence band holes, thus opening new avenues for achieving higher values of TC.
description: 5 figures, supplementary material included
Current evidence of contraceptive uptake, pregnancy and continuation rates in young women: a systematic review and Meta-analysis
Creators: name: Farah, Daniela
name: Andrade, Teresa Raquel Moraes
name: de Jármy Di Bella, Zsuzsanna Ilona Katalin
name: Girão, Manoel João Batista Castello
name: Fonseca, Marcelo Cunio Machado
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy

description: Half of all pregnancies worldwide are unintended, and the rate is even higher in women aged ≤25 years. We sought to identify which method of contraception was the most effective option to prevent unintended pregnancy in young women and adolescents. Systematic searches, without language restrictions, were carried out of the PubMed, Embase, Lilacs and Cochrane databases from inception to July 2020. Abstracts and full-text articles of observational studies and randomised controlled trials comparing the use of multiple methods of long-acting reversible contraception (LARC) and short-acting reversible contraception (SARC) in young women and adolescents were screened and reviewed. Risk ratios (RRs) and mean differences with their 95% confidence interval (CI) were derived using a random-effects meta-analytical model. Meta-analyses provided pooled estimates for adverse events, continuation rates and efficacy of LARC methods in young women and adolescents. Nine of the 25 included studies compared LARC with SARC, and 16 compared LARC methods only. At 12 months, young women had better adherence with LARC compared with SARC (n = 1606; RR 1.60; 95% CI 1.21, 2.12; I2 = 88%), which suggests a better unintended pregnancy prevention outcome for young women. However, more young women chose SARC (n = 2835; RR 0.37; 95% CI 0.17, 0.80; I2 = 99%). Pregnancy during LARC use was rare. LARC methods are the most efficacious in preventing pregnancy, and women should be informed of this if pregnancy prevention is their priority. The evidence, however, is of low quality. CRD42017055452.
Becoming and being feminist: an existential phenomenological study
Creators: name: Horn, Veronica
Publisher: name: University of Calgary
Year: 1998
Subjects: subject: HQ1206 .H67 1998
subject: Additional Copy: 370 EDC 1998 HORN in the Doucette Education Library
subject: Feminism--Social aspects.
subject: Feminism--Psychological aspects.
subject: Feminism--Study and teaching.

description: Bibliography: p. 174-186
Die Andechs-Meranier in Franken
Creators: name: Baumann-Oelwein, Cornelia
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 39 Nr. 1 (1998): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Extremal Behaviour in Multiagent Contract Negotiation
Creators: name: Dunne, P. E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: We examine properties of a model of resource allocation in which several agents exchange resources in order to optimise their individual holdings. The schemes discussed relate to well-known negotiation protocols proposed in earlier work and we consider a number of alternative notions of rationality covering both quantitative measures, e.g. cooperative and individual rationality and more qualitative forms, e.g. Pigou-Dalton transfers. While it is known that imposing particular rationality and structural restrictions may result in some reallocations of the resource set becoming unrealisable, in this paper we address the issue of the number of restricted rational deals that may be required to implement a particular reallocation when it is possible to do so. We construct examples showing that this number may be exponential (in the number of resources m), even when all of the agent utility functions are monotonic. We further show that k agents may achieve in a single deal a reallocation requiring exponentially many rational deals if at most k-1 agents can participate, this same reallocation being unrealisable by any sequences of rational deals in which at most k-2 agents are involved.
Synthesizing Speech from Intracranial Depth Electrodes using an Encoder-Decoder Framework
Creators: name: Kohler, Jonas
name: Ottenhoff, Maarten C.
name: Goulis, Sophocles
name: Angrick, Miguel
name: Colon, Albert J.
name: Wagner, Louis
name: Tousseyn, Simon
name: Kubben, Pieter L.
name: Herff, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Speech Neuroprostheses have the potential to enable communication for people with dysarthria or anarthria. Recent advances have demonstrated high-quality text decoding and speech synthesis from electrocorticographic grids placed on the cortical surface. Here, we investigate a less invasive measurement modality in three participants, namely stereotactic EEG (sEEG) that provides sparse sampling from multiple brain regions, including subcortical regions. To evaluate whether sEEG can also be used to synthesize audio from neural recordings, we employ a recurrent encoder-decoder model based on modern deep learning methods. We find that speech can indeed be reconstructed with correlations up to 0.8 from these minimally invasive recordings, despite limited amounts of training data. In particular, the architecture we employ naturally picks up on the temporal nature of the data and thereby outperforms an existing benchmark based on non-regressive convolutional neural networks.
MAGIC detection of the putative gamma-ray binary HESS J0632+057
Creators: name: Jogler, T.
name: Munar-Adrover, P.
name: Ribó, M.
name: Paredes, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The variable gamma-ray source HESS J0632+057 is an excellent candidate for a gamma-ray binary. The putative binary system was discovered as a point-like VHE gamma-ray source by HESS. Later measurements by VERITAS yielding no detection, provided evidence for variable emission in the gamma-ray domain. A variable X-ray source as well as a Be star (MWC 148) are found at the location of the gamma-ray source. Recently a periodic X-ray outburst occurring about every 320 days was reported by Swift (ATel 3152). The putative binary system was observed by the MAGIC stereo system in 2010 and 2011. Our measurements demonstrate significant activity in the gamma-ray (E > 200 GeV) band in February 2011. Our detection of the system occurred during an X-ray outburst reported by Swift. Here we present the obtained light curve and spectrum during this outburst and put them into context with the X-ray measurements.
description: 4 pages, In Proceedings of the 32nd International Cosmic Ray Conference (Beijing)
An Assessment of Scientific Evidence Relating to the Effect of Early Experience on the Risk of Human-Directed Aggression by Adult Dogs
Creators: name: Mills, Daniel
name: Baslington-Davis, Ann
name: Howell, Helen
name: Hogue, Todd
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 300999
subject: Veterinary sciences not elsewhere classified

description: Human-directed aggression by domestic dogs is a major worldwide public health problem. The causes of aggression are complex, and research in this area often has to balance ecological validity with pragmatic controls; accordingly, it often does not meet the thresholds for quality typically used in reviews applying a classical “evidence-based” approach. Here, we propose a method of literature assessment that makes the “best use” of available evidence to identify and synthesise evidence relating to the most likely risk factors reported in the scientific literature. We used a systematic review process to initially identify relevant literature relating to potential early life experience (i.e., in the first six months of life) risk factors in the dog for human-directed aggression in the adult animal. Fourteen papers met our initial screening process and were subsequently analysed in detail, with data extracted and effect sizes calculated where possible. This highlighted the potential importance of the source of the animal, the age at which it was rehomed, the reason for the acquisition, the experience level of the owner, the animal’s socialisation experiences, the consistent husbandry and management practices, the training, the sex ratio of the litter and the history of dogs that display aggression in the pedigree as risk factors. Taken together, it seems that early experiences which limit the ability to develop effective coping strategies and routines may be particularly important. We provide guidance for the future standardised reporting of risk related to human-directed aggression by dogs to allow greater synthesis of the literature in the future.
Secret Symmetries in AdS/CFT
Creators: name: de Leeuw, Marius
name: Matsumoto, Takuya
name: Moriyama, Sanefumi
name: Regelskis, Vidas
name: Torrielli, Alessandro
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We discuss special quantum group (secret) symmetries of the integrable system associated to the AdS/CFT correspondence. These symmetries have by now been observed in a variety of forms, including the spectral problem, the boundary scattering problem, n-point amplitudes, the pure-spinor formulation and quantum affine deformations.
description: 20 pages, pdfLaTeX; Submitted to the Proceedings of the Nordita program `Exact Results in Gauge-String Dualities'; Based on the talk presented by A.T., Nordita, 15 February 2012
Tensors and Spinors in de Sitter Space
Creators: name: Pethybridge, Ben
name: Schaub, Vladimir
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct the Wightman function for symmetric traceless tensors and Dirac fermions in dS$_{d+1}$ in a coordinate and index free formalism using a $d+2$ dimensional ambient space. We expand the embedding space formalism to cover spinor and tensor fields in any even or odd dimension. Our goal is to furnish a self-contained toolkit for the study of fields of arbitrary spin in de Sitter, with applications to cosmological perturbation theory. The construction for spinors is shown in extensive detail. Concise expressions for the action of isometry generators on generic bulk fields, the 2-point function of bulk spinors, and a derivation of the uplift of the spinorial covariant derivative are included.
description: 33 pages, 1 figure. v2 : Minor corrections and simplifications, added references. v3 : matches published version
Kelvin-Helmholtz instability in two-component Bose gases on a lattice
Creators: name: Lundh, E.
name: Martikainen, J. -P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We explore the stability of the interface between two phase-separated Bose gases in relative motion on a lattice. Gross-Pitaevskii-Bogoliubov theory and the Gutzwiller ansatz are employed to study the short- and long-time stability properties. The underlying lattice introduces effects of discreteness, broken spatial symmetry, and strong correlations, all three of which are seen to have considerable qualitative effects on the Kelvin-Helmholtz instability. Discreteness is found to stabilize low flow velocities, because of the finite energy associated with displacing the interface. Broken spatial symmetry introduces a dependence not only on the relative flow velocity, but on the absolute velocities. Strong correlations close to a Mott transition will stop the Kelvin-Helmholtz instability from affecting the bulk density and creating turbulence; instead, the instability will excite vortices with Mott-insulator filled cores.
description: 11 pages, 11 figures
Single-state semiquantum private comparison based on Bell states
Creators: name: Geng, Mao-Jie
name: Chen, Ying
name: Xu, Tian-Jie
name: Ye, Tian-Yu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, a novel semiquantum private comparison (SQPC) protocol based on single kind of Bell states is proposed, which allows two classical parties to judge the equality of their private inputs securely and correctly under the help of a semi-honest third party (TP) who possesses complete quantum capabilities. TP is allowed to misbehave on her own but cannot conspire with anyone else. Our protocol needs none of unitary operations, quantum entanglement swapping or the reordering operations. Moreover, our protocol only needs to prepare single kind of Bell states as initial quantum resource. Detailed security analysis turns out that our protocol is secure against various outside and participant attacks. Compared with most of the existing SQPC protocols based on Bell states, our protocol is more feasible in practice.
description: 29 pages, 3 figures, 4 tables
Coupling function from bath density of states
Creators: name: Nemati, Somayyeh
name: Henkel, Carsten
name: Anders, Janet
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Modelling of an open quantum system requires knowledge of parameters that specify how it couples to its environment. However, beyond relaxation rates, realistic parameters for specific environments and materials are rarely known. Here we present a method of inferring the coupling between a generic system and its bosonic (e.g., phononic) environment from the experimentally measurable density of states (DOS). With it we confirm that the DOS of the well-known Debye model for three-dimensional solids is physically equivalent to choosing an Ohmic bath. We further match a real phonon DOS to a series of Lorentzian coupling functions, allowing us to determine coupling parameters for gold, yttrium iron garnet (YIG) and iron as examples. The results illustrate how to obtain material-specific dynamical properties, such as memory kernels. The proposed method opens the door to more accurate modelling of relaxation dynamics, for example for phonon-dominated spin damping in magnetic materials.
description: 8 pages and 4 figures
Inhalt des Heftes 1991/1
Creators: name: Die Redaktion
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 32 Nr. 1 (1991): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
A descriptive longitudinal cohort study of involuntary psychiatric inpatients
Creators: name: Crisanti, Annette S.
Publisher: name: University of Calgary
Year: 1998
Subjects: subject: RC439 .C75 1998
subject: Mentally ill--Care and treatment.
subject: Psychiatric hospitals - Outpatient services
subject: Insane--Commitment and detention--Canada.

description: Bibliography: p. 207-227
Outward migration of a giant planet with a gravitationally unstable gap edge
Creators: name: Lin, Min-Kai
name: Papaloizou, John
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present numerical simulations of disc-planet interactions where the planet opens a gravitationally unstable gap in an otherwise gravitationally stable disc. In our disc models, where the outer gap edge can be unstable to global spiral modes, we find that as we increase the surface density scale the gap becomes more unstable and the planet migrates outwards more rapidly. We show that the positive torque is provided by material brought into the planet's coorbital region by the spiral arms. This material is expected to execute horseshoe turns upon approaching the planet and hence torque it. Our results suggest that standard type II migration, applicable to giant planets in non-self-gravitating viscous discs, is likely to be significantly modified in massive discs when gravitational instabilities associated with the gap occur.
description: 9 pages, 11 figures, accepted by MNRAS
Heat equation with inverse-square potential of bridging type across two half-lines
Creators: name: Gallone, Matteo
name: Michelangeli, Alessandro
name: Pozzoli, Eugenio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The heat equation with inverse square potential on both half-lines of $\mathbb{R}$ is discussed in the presence of \emph{bridging} boundary conditions at the origin. The problem is the lowest energy (zero-momentum) mode of the transmission of the heat flow across a Grushin-type cylinder, a generalisation of an almost Riemannian structure with compact singularity set. This and related models are reviewed, and the issue is posed of the analysis of the dispersive properties for the heat kernel generated by the underlying positive self-adjoint operator. Numerical integration is shown that provides a first insight and relevant qualitative features of the solution at later times.
Classical Analogue of Weak Value in Stochastic Process
Creators: name: Tomita, Hiroyuki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: One of the remarkable notions in the recent development of quantum physics is the weak value related to weak measurements. We emulate it as a two-time conditional expectation in a classical stochastic model. We use the well known symmetrized form of the master equation, which is formally equivalent to the wave equation in quantum mechanics apart from the fact that wave functions are always real. The origin of the unusual behaviors of the weak value such as the negative probability and the abnormal enhancement of some expectations becomes clearer in the present case, where the two-time conditional probability has no ambiguity of imaginary/complex values.
description: Revised version from Arxiv:1109.4302. To appear in the proceedings of the Symposium on 'Interface between Quantum Information and Statistical Physics', to be published by World Scientific
Burg Sponheim
Creators: name: Köhl, Stefan
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 33 Nr. 1 (1992): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
High-resolution vibronic spectroscopy of a single molecule embedded in a crystal
Creators: name: Zirkelbach, Johannes
name: Mirzaei, Masoud
name: Deperasinska, Irena
name: Kozankiewicz, Boleslaw
name: Gurlek, Burak
name: Shkarin, Alexey
name: Utikal, Tobias
name: Götzinger, Stephan
name: Sandoghdar, Vahid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Vibrational levels of the electronic ground states in dye molecules have not been previously explored at high resolution in solid matrices. We present new spectroscopic measurements on single polycyclic aromatic molecules of dibenzoterrylene embedded in an organic crystal made of para-dichlorobenzene. To do this, we use narrow-band continuous-wave lasers and combine spectroscopy methods based on fluorescence excitation and stimulated emission depletion (STED) to assess individual vibrational linewidths in the electronic ground state at a resolution of ~30 MHz dictated by the linewidth of the electronic excited state. In this fashion, we identify several exceptionally narrow vibronic levels with linewidths down to values around 2GHz. Additionally, we sample the distribution of vibronic wavenumbers, relaxation rates, and Franck-Condon factors, both in the electronic ground and excited states for a handful of individual molecules. We discuss various noteworthy experimental findings and compare them with the outcome of DFT calculations. The highly detailed vibronic spectra obtained in our work pave the way for studying the nanoscopic local environment of single molecules. The approach also provides an improved understanding of the vibrational relaxation mechanisms in the electronic ground state, which may help to create long-lived vibrational states for applications in quantum technology.
Der Eigentümer und sein Denkmal - das Denkmal in privater Hand
Creators: name: Weigand, Robert F. E.
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 33 Nr. 2 (1992): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Pauli stabilizer models of twisted quantum doubles
Creators: name: Ellison, Tyler D.
name: Chen, Yu-An
name: Dua, Arpit
name: Shirley, Wilbur
name: Tantivasadakarn, Nathanan
name: Williamson, Dominic J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We construct a Pauli stabilizer model for every two-dimensional Abelian topological order that admits a gapped boundary. Our primary example is a Pauli stabilizer model on four-dimensional qudits that belongs to the double semion (DS) phase of matter. The DS stabilizer Hamiltonian is constructed by condensing an emergent boson in a $\mathbb{Z}_4$ toric code, where the condensation is implemented by making certain two-body measurements. We rigorously verify the topological order of the DS stabilizer model by identifying an explicit finite-depth quantum circuit (with ancillary qubits) that maps its ground state subspace to that of a DS string-net model. We show that the construction of the DS stabilizer Hamiltonian generalizes to all twisted quantum doubles (TQDs) with Abelian anyons. This yields a Pauli stabilizer code on composite-dimensional qudits for each such TQD, implying that the classification of topological Pauli stabilizer codes extends well beyond stacks of toric codes - in fact, exhausting all Abelian anyon theories that admit a gapped boundary. We also demonstrate that symmetry-protected topological phases of matter characterized by type I and type II cocycles can be modeled by Pauli stabilizer Hamiltonians by gauging certain 1-form symmetries of the TQD stabilizer models.
description: 23+11 pages, 13 figures, published version, minor corrections to Fig. 3 and Eq. (133), corrected missing minus sign in Eq. (63)
Nach der Katastrophe
Creators: name: Liessem, Udo
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 35 Nr. 1 (1994): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Jean Mesqui, Châteaux et enceintes de la France médiévale
Creators: name: Zeune, Joachim
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: Rezension zu: Jean Mesqui, Châteaux et enceintes de la France médiévale. De la défense à la résidence, tome 1: Les Organes de la défense. Paris: Picard 1991, 376 Seiten, 452 Abbildungen (Strichzeichnungen und Schwarzweißfotos), fest gebunden. ISBN 2-7084-0419-9, ISSN 0242-7249.
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 35 Nr. 1 (1994): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Ultra-strong Adhesion of Graphene Membranes
Creators: name: Koenig, Steven P.
name: Boddeti, Narasimha G.
name: Dunn, Martin L.
name: Bunch, J. Scott
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: As mechanical structures enter the nanoscale regime, the influence of van der Waals forces increases. Graphene is attractive for nanomechanical systems because its Young's modulus and strength are both intrinsically high, but the mechanical behavior of graphene is also strongly influenced by the van der Waals force. For example, this force clamps graphene samples to substrates, and also holds together the individual graphene sheets in multilayer samples. Here we use a pressurized blister test to directly measure the adhesion energy of graphene sheets with a silicon oxide substrate. We find an adhesion energy of 0.45 \pm 0.02 J/m2 for monolayer graphene and 0.31 \pm 0.03 J/m2 for samples containing 2-5 graphene sheets. These values are larger than the adhesion energies measured in typical micromechanical structures and are comparable to solid/liquid adhesion energies. We attribute this to the extreme flexibility of graphene, which allows it to conform to the topography of even the smoothest substrates, thus making its interaction with the substrate more liquid-like than solid-like.
description: to appear in Nature Nanotechnology
Walter Melzer, Die Wewelsburg vom hohen Mittelalter bis in die frühe Neuzeit. Ergebnisse einer archäologischen Untersuchung zu den Anfängen der Burg / Albrecht Seufert, In Form eines Triangels, in einer wahrlich sehenswerten und prachtvollen Gestalt. Die Geschichte der Wewelsburg bis zum Anfang des 19. Jahrhunderts
Creators: name: Zeune, Joachim
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: Rezension zu: Walter Melzer, Die Wewelsburg vom hohen Mittelalter bis in die frühe Neuzeit. Ergebnisse einer archäologischen Untersuchung zu den Anfängen der Burg. Stamsried: Ernst Vögel 1992, 159 Seiten, 95 Abbildungen (Strichzeichnungen und Schwarzweißfotos), ein Faltplan, fest gebunden. ISBN 3-925355-70-7. Albrecht Seufert, In Form eines Triangels, in einer wahrlich sehenswerten und prachtvollen Gestalt. Die Geschichte der Wewelsburg bis zum Anfang des 19. Jahrhunderts. Marburg: Jonas Verlag 1992, 269 Seiten, 104 Abbildungen (Strichzeichnungen und Schwarzweißfotos), Paperback. ISBN 3-89445-121 -1.
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 35 Nr. 1 (1994): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Mantra of passion: an artistic and pedagogical inquiry
Creators: name: Watrin, Rhonda Marlee
Publisher: name: University of Calgary
Year: 1998
Subjects: subject: N88 .W385 1998
subject: Additional Copy: 370 EDC 1998 WAT in the Doucette Education Library.
subject: Art teachers - Attitudes
subject: Art teachers - Training of
subject: Self-actualization (Psychology)

description: Bibliography: p. 203-217
Ritterburg und Fürstenschloß
Creators: name: Loibl, Richard
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 39 Nr. 1 (1998): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Combining Knowledge- and Corpus-based Word-Sense-Disambiguation Methods
Creators: name: Montoyo, A.
name: Palomar, M.
name: Rigau, G.
name: Suarez, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this paper we concentrate on the resolution of the lexical ambiguity that arises when a given word has several different meanings. This specific task is commonly referred to as word sense disambiguation (WSD). The task of WSD consists of assigning the correct sense to words using an electronic dictionary as the source of word definitions. We present two WSD methods based on two main methodological approaches in this research area: a knowledge-based method and a corpus-based method. Our hypothesis is that word-sense disambiguation requires several knowledge sources in order to solve the semantic ambiguity of the words. These sources can be of different kinds--- for example, syntagmatic, paradigmatic or statistical information. Our approach combines various sources of knowledge, through combinations of the two WSD methods mentioned above. Mainly, the paper concentrates on how to combine these methods and sources of information in order to achieve good results in the disambiguation. Finally, this paper presents a comprehensive study and experimental work on evaluation of the methods and their combinations.
Ludwig Tavernier, Der Dombezirk von Brixen im Mittelalter
Creators: name: Jost, Bettina
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: Rezension zu: Ludwig Tavernier, Der Dombezirk von Brixen im Mittelalter, Schlern-Schriften 294, Innsbruck: Universitätsverlag Wagner 1996, ISBN 3-7030-0266-2.
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 39 Nr. 1 (1998): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Interaction-Driven Spectrum Reconstruction in Bilayer Graphene
Creators: name: Mayorov, A. S.
name: Elias, D. C.
name: Mucha-Kruczynski, M.
name: Gorbachev, R. V.
name: Tudorovskiy, T.
name: Zhukov, A.
name: Morozov, S. V.
name: Katsnelson, M. I.
name: Fal'ko, V. I.
name: Geim, A. K.
name: Novoselov, K. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The nematic phase transition in electronic liquids, driven by Coulomb interactions, represents a new class of strongly correlated electronic ground states. We studied suspended samples of bilayer graphene, annealed so that it achieves very high quasiparticle mobilities. Bilayer graphene is a truly two-dimensional material with complex chiral electronic spectra and the high quality of our samples allowed us to observe strong spectrum reconstructions and electron topological transitions that can be attributed to a nematic phase transition and a decrease in rotational symmetry. These results are especially surprising because no interaction effects have been observed so far in bilayer graphene in the absence of an applied magnetic field.