cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quasi groupes de Frobenius dimensionnels
Creators: name: Zamour, Samuel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: We are interested in a class of groups, quasi-Frobenius groups (with involutions), whose internal structure generalizes that of the classical groups GA1(C), PGL 2(C) and SO3(R) : a subgroup and its conjugates, of finite index in their normalizer and trivial mutual intersection, cover "generically" the ambient group. From the perspective of model theory, we work with the hypothesis of the existence of a good notion of dimension on definable sets (we must distinguish between the o-minimal case and the ranked case). We pay special attention to the ranked case. By studying the geometry of incidence induced by involutions, we sketch a classification of quasi-Frobenius groups and thus determine under which conditionsclassical groups can be identified in a dimensional framework -- -- Nous nous intéressons à une classe de groupes, les quasi-groupes de Frobenius (avec involutions), dont la structure interne généralise celle des groupes classiques GA1(C), PGL2(C) et SO3(R) : un sous-groupe et ses conjugués, d'indice fini dans leur normalisateur et d'intersection mutuelle triviale, recouvrent "génériquement" le groupe ambiant. Dans la perspective de la théorie des modèles, nous travaillons avec l'hypothèse de l'existence d'une bonne notion dimension sur les ensembles définissables (il faut distinguer le cas o-minimal et le cas rangé). Nous accordons une attention particulière au cas rangé. En étudiant la géométrie d'incidence induite par les involutions, nous esquissons une classification des quasi-groupes de Frobenius et nous déterminons ainsi sous quelles conditions des groupes classiques peuvent être identifiés dans un cadre dimensionnel.
description: in French
Time Distributions of Large and Small Sunspot Groups Over Four Solar Cycles
Creators: name: Kilcik, A.
name: Yurchyshyn, V. B.
name: Abramenko, V.
name: Goode, P. R.
name: Ozguc, A.
name: Rozelot, J. P.
name: Cao, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Here we analyze solar activity by focusing on time variations of the number of sunspot groups (SGs) as a function of their modified Zurich class. We analyzed data for solar cycles 2023 by using Rome (cycles 2021) and Learmonth Solar Observatory (cycles 2223) SG numbers. All SGs recorded during these time intervals were separated into two groups. The first group includes small SGs (A, B, C, H, and J classes by Zurich classification) and the second group consists of large SGs (D, E, F, and G classes). We then calculated small and large SG numbers from their daily mean numbers as observed on the solar disk during a given month. We report that the time variations of small and large SG numbers are asymmetric except for the solar cycle 22. In general large SG numbers appear to reach their maximum in the middle of the solar cycle (phase 0.450.5), while the international sunspot numbers and the small SG numbers generally peak much earlier (solar cycle phase 0.290.35). Moreover, the 10.7 cm solar radio flux, the facular area, and the maximum CME speed show better agreement with the large SG numbers than they do with the small SG numbers. Our results suggest that the large SG numbers are more likely to shed light on solar activity and its geophysical implications. Our findings may also influence our understanding of long term variations of the total solar irradiance, which is thought to be an important factor in the Sun - Earth climate relationship.
Stephen Murray, Building Troyes Cathedral. The Late Gothic Building Campaigns
Creators: name: Klein, Bruno
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Rezension zu: Stephen Murray, Building Troyes Cathedral. The Late Gothic Building Campaigns. Bloomington und Indianapolis, Indiana University Press 1987. 257 Seiten, 120 Abb. auf Tafeln.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 41 Nr. 9 (1988): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
T-duality of NSR superstring: The worldsheet perspective
Creators: name: Maharana, Jnanadeva
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We formulate target space duality symmetry of NSR superstring from the perspectives of worldsheet. The worldsheet action is presented in the superspace formalism in the presence of massless backgrounds. We start from a ${\hat D}$-dimensional target space worldsheet action and compactify the theory on a d-dimensional torus, $T^d$. It is assumed that the backgrounds are independent of compact (super)coordinates. We adopt the formalism of our earlier work to introduce dual supercoordinates along compact directions and introduce the corresponding dual backgrounds. It is demonstrated that combined equations of motion of the two sets of coordinates can be expressed in a manifestly $O(d,d)$ covariant form analogous to the equations of motions for closed bosonic string derived by us. Furthermore, we show that the vertex operators associated with excited massive levels of NSR string can be expressed in an $O(d,d)$ invariant form generalizing earlier result for closed bosonic string.
description: 21 pages
Corporate Governance in UK Companies, 1995
Creators: name: Conyon, M.
Publisher: name: UK Data Service
Year: 1997

description: The purpose of this study was to examine recent boardroom corporate governance changes in UK firms since the publication of the Cadbury Committee Report of 1992. The Cadbury Report set out the principles which were to become the standard against which companies would be assessed in relation to their corporate governance practices. The aim of this research project was to examine whether companies were adhering to the principles outlined in the Cadbury Report, by surveying listed UK companies.
 The companies involved in the survey supplied information in confidence; a company identifier variable is included in the dataset, but there is no way to link this with actual companies, therefore preserving confidentiality.
0141 A Corrupt Past: The Case of Bratislava Castle
Creators: name: Bakoš, Ján
Publisher: name: RIHA Journal
Year: 2016

description: The paper explores the history of the restoration of Bratislava Castle, the typical symbol of Slovakia's capital. It concentrates on the extensive reconstruction of the castle carried out in the late 1950s and 1960s under the former Czechoslovak communist regime. The story of Bratislava Castle is peculiar not so much because of the way in which the past was violated and history used for the transient goals of political leaders, but because of the way in which the castle was nationalised through a historicising reconstruction. The final utilitarian act of all the previous ideological manipulations of the castle was the erection of a new building within the castle walls. It was built after the Velvet Revolution in 1989 to serve the needs of the new independent Slovak parliament. Nationalistic illusionism had again joined forces with utilitarianism, this time to produce an architectural language known as commercial Baroque.
description: RIHA Journal, 2016: RIHA Journal
The p-adic monodromy theorem in the imperfect residue field case
Creators: name: Ohkubo, Shun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Let K be a complete discrete valuation field of mixed characteristic (0,p) and G_K the absolute Galois group of K. In this paper, we will prove the p-adic monodromy theorem for p-adic representations of G_K without any assumption on the residue field of K, for example the finiteness of a p-basis of the residue field of K. The main point of the proof is a construction of (phi,G_K)-module Nrig^+(V) for a de Rham representation V, which is a generalization of Pierre Colmez' Nrig^+(V). In particular, our proof is essentially different from Kazuma Morita's proof in the case when the residue field admits a finite p-basis. We also give a few applications of the p-adic monodromy theorem, which are not mentioned in the literature. First, we prove a horizontal analogue of the p-adic monodromy theorem. Secondly, we prove an equivalence of categories between the category of horizontal de Rham representations of G_K and the category of de Rham representations of an absolute Galois group of the canonical subfield of K. Finally, we compute H^1 of some p-adic representations of G_K, which is a generalization of Osamu Hyodo's results.
description: 41 pages
A Differentially Private Probabilistic Framework for Modeling the Variability Across Federated Datasets of Heterogeneous Multi-View Observations
Creators: name: Balelli, Irene
name: Silva, Santiago
name: Lorenzi, Marco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We propose a novel federated learning paradigm to model data variability among heterogeneous clients in multi-centric studies. Our method is expressed through a hierarchical Bayesian latent variable model, where client-specific parameters are assumed to be realization from a global distribution at the master level, which is in turn estimated to account for data bias and variability across clients. We show that our framework can be effectively optimized through expectation maximization (EM) over latent master's distribution and clients' parameters. We also introduce formal differential privacy (DP) guarantees compatibly with our EM optimization scheme. We tested our method on the analysis of multi-modal medical imaging data and clinical scores from distributed clinical datasets of patients affected by Alzheimer's disease. We demonstrate that our method is robust when data is distributed either in iid and non-iid manners, even when local parameters perturbation is included to provide DP guarantees. Moreover, the variability of data, views and centers can be quantified in an interpretable manner, while guaranteeing high-quality data reconstruction as compared to state-of-the-art autoencoding models and federated learning schemes. The code is available at https://gitlab.inria.fr/epione/federated-multi-views-ppca.
description: Accepted for publication at the Journal of Machine Learning for Biomedical Imaging (MELBA) https://www.melba-journal.org
0137 On Being Modern: Possibilities of Resistance through Primitivism and Ingenuousness in Ernesto de Sousa and Almada Negreiros
Creators: name: Santos, Mariana Pinto Dos
Publisher: name: RIHA Journal
Year: 2016

description: This paper aims to contrast the particular uses of the modern categories of ingenuousness and primitivism both in José de Almada Negreiros and Ernesto de Sousa within their broader presence in twentieth century art. In so doing it seeks to contextualize multiple ways of understanding modernity and its legitimation through discursive practices. Ernesto de Sousa reinterpreted an idea of modernity that followed up on Almada Negreiros' modern experience. The concept of "voluntary ingenuousness" was developed by Almada after the 1920s, but it had its roots in the futurist proposals he embraced in the first decades of the twentieth century. Primitivism and ingenuousness were the fundamental terms for Almada Negreiros and Ernesto de Sousa through which they reinvented themselves as well as modernity and forged liberty within a dictatorship regime.
description: RIHA Journal, 2016: Special Issue "Southern Modernisms"
Adaptive Forecasting of the EURIBOR Swap Term Structure
Creators: name: Blaskowitz, Oliver
name: Herwartz, Helmut
Publisher: name: Humboldt-Universität zu Berlin, Wirtschaftswissenschaftliche Fakultät
Year: 2008
Subjects: subject: Principal components
subject: ex–ante forecasting
subject: EURIBOR swap rates
subject: term structure
subject: directional accuracy
subject: big hit ability
subject: 330 Wirtschaft

description: In this paper we adopt a principal components analysis (PCA) to reduce the dimensionality of the term structure and employ autoregressive models (AR) to forecast principal components which, in turn, are used to forecast swap rates. Arguing in favor of structural variation, we propose data driven, adaptive model selection strategies based on the PCA/AR model. To evaluate ex-ante forecasting performance for particular rates, different forecast features such as mean squared errors, directional accuracy and big hit ability are considered. It turns out that relative to benchmark models, the adaptive approach offers additional forecast accuracy in terms of directional accuracy and big hit ability.
0199 CIHA as the Subject of Art Theory
Creators: name: Cooke, Jennifer
Publisher: name: RIHA Journal
Year: 2018

description: The title of this article recalls a session of the 2012 CIHA congress in Nuremberg – 'CIHA as the Object of Art History' – that analysed the role the Comité International d'Histoire de l'Art in the development of art history as a discipline. Only a few years earlier, Heinrich Dilly had drawn an overview of the International Congresses of Art History, together with specialists of other fields. Dilly explained the lack of interest of art historiography for the import of such conferences with the fact that they were 'too big a matter', as the papers had rapidly multiplied, and also 'very large a matter', in the sense that the debate was difficult to frame and, more often than not, the choice of participants depended on a political agenda rather than scientific reasons. This article thus endeavours to tackle this very large matter as a vantage point on the methodological reflection, in the attempt to trace the continuities and discontinuities of the theoretical discourse insofar as discussed in CIHA meetings, from the Lisbon conference in 1949 to that held in Nuremberg in 2012.
description: RIHA Journal, 2018: RIHA Journal
Thermal Friction as a Solution to the Hubble and Large-Scale Structure Tensions
Creators: name: Berghaus, Kim V.
name: Karwal, Tanvi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Thermal friction offers a promising solution to the Hubble and the large-scale structure (LSS) tensions. This additional friction acts on a scalar field in the early universe and extracts its energy density into dark radiation, the cumulative effect being similar to that of an early dark energy (EDE) scenario. The dark radiation automatically redshifts at the minimal necessary rate to improve the Hubble tension. On the other hand, the addition of extra radiation to the Universe can improve the LSS tension. We explore this model in light of cosmic microwave background (CMB), baryon acoustic oscillation and supernova data, including the SH0ES $H_0$ measurement and the Dark Energy Survey Y1 data release in our analysis. Our results indicate a preference for the regime where the scalar field converts to dark radiation at very high redshifts, asymptoting effectively to an extra self-interacting radiation species rather than an EDE-like injection. In this limit, thermal friction can ease both the Hubble and the LSS tensions, but not resolve them. We find the source of this preference to be the incompatibility of the CMB data with the linear density perturbations of the dark radiation when injected at redshifts close to matter-radiation equality.
description: 12 pages, 9 figures, 9 tables (+ 8 pages, 4 figures, 4 tables in appendix); v2 expands analysis to baseline only datasets, and includes interpretation of results using Bayesian information criterion, as well as minor clarifications in text. v2 matches journal version
Invariants of Toric Seiberg Duality
Creators: name: Hanany, Amihay
name: He, Yang-Hui
name: Jejjala, Vishnu
name: Pasukonis, Jurgis
name: Ramgoolam, Sanjaye
name: Rodriguez-Gomez, Diego
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Three-branes at a given toric Calabi-Yau singularity lead to different phases of the conformal field theory related by toric (Seiberg) duality. Using the dimer model/brane tiling description in terms of bipartite graphs on a torus, we find a new invariant under Seiberg duality, namely the Klein j-invariant of the complex structure parameter in the distinguished isoradial embedding of the dimer, determined by the physical R-charges. Additional number theoretic invariants are described in terms of the algebraic number field of the R-charges. We also give a new compact description of the a-maximization procedure by introducing a generalized incidence matrix.
description: 43 pages, 8 figures, LaTeX
The relationship between intrasentence organizational strategies and the application of syntactic and semantic constraints in reading.
Creators: name: Braun, Evelyn
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: LB 1573.7 B72 1979 Microfiche
subject: Reading (Elementary)
subject: Reading comprehension
subject: Grade four students

description: Bibliography: p. 93-97.
Nearly optimal bounds for the global geometric landscape of phase retrieval
Creators: name: Cai, Jian-Feng
name: Huang, Meng
name: Li, Dong
name: Wang, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The phase retrieval problem is concerned with recovering an unknown signal $\bf{x} \in \mathbb{R}^n$ from a set of magnitude-only measurements $y_j=|\langle \bf{a}_j,\bf{x} \rangle|, \; j=1,\ldots,m$. A natural least squares formulation can be used to solve this problem efficiently even with random initialization, despite its non-convexity of the loss function. One way to explain this surprising phenomenon is the benign geometric landscape: (1) all local minimizers are global; and (2) the objective function has a negative curvature around each saddle point and local maximizer. In this paper, we show that $m=O(n \log n)$ Gaussian random measurements are sufficient to guarantee the loss function of a commonly used estimator has such benign geometric landscape with high probability. This is a step toward answering the open problem given by Sun-Qu-Wright, in which the authors suggest that $O(n \log n)$ or even $O(n)$ is enough to guarantee the favorable geometric property.
description: 32 pages
0201 The Art of the Enfants Terribles: Infantilism and Dilettantism in Punk Art
Creators: name: Skov, Marie Arleth
Publisher: name: RIHA Journal
Year: 2018

description: Punk was visual as much as it was musical. In recent years, art historical research of punk works of art has increased. However, a thorough analysis of punk art's themes, motifs, and methods is still lacking. This article examines infantilism and dilettantism as two key notions within punk art, as illustrated by the collage L'ecole de l'art infantile (COUM Transmissions, 1974) and the super 8 film Das Leben des Sid Vicious (Die Tödliche Doris, 1981). Analysis shows how concepts of childishness, nonconformism and anti-authoritarianism are interconnected both with punk's DIY ethos and its self-identification as a youth movement. Furthermore, the article discusses punk art's circumvention of antithetical concepts, such as failure vs. success, innocence vs. guilt, reality vs. fantasy, skill vs. incompetence.
description: RIHA Journal, 2018: RIHA Journal
A Critical examination of B. F. Skinner's philosophy and science of mind
Creators: name: Kelly, Ivan William
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: BF 109 S55 K44 1978 Microfiche
subject: Skinner, B. F. (Burrhus Frederic), 1904-
subject: Behaviorism (Psychology)

description: Bibliography: p. 145-161.
Foreign Ethnographic Collections in Scotland, 18th-20th Century
Creators: name: Kwasnik, E.
name: Willett, F.
name: Idiens, D.
Publisher: name: UK Data Service
Year: 1997

description: The purpose of the study was to examine foreign ethnographic material in Scotland, and record it and its environmental conditions. The main disciplines covered include ethnography, social anthropology, fine arts and decorative arts.
Re-determination of the Pseudobinary System Li2O-MoO3
Creators: name: Moser, M.
name: Klimm, D.
name: Ganschow, S.
name: Kwasniewski, A.
name: Jacobs, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The quasi-binary phase diagram lithium oxide - molybdenum(VI) oxide was investigated by differential scanning calorimetry and X-ray diffraction. The four intermediate phases Li4MoO5, Li2MoO4, Li4Mo5O17, and Li2Mo4O13 show incongruent melting. The system has one eutectic point at 50.5 mol% MoO3 and 49.5 mol% LiO0.5 with a eutectic temperature of 524.6 deg C. At this point the melt is in equilibrium with Li2MoO4 and Li4Mo5O17.
description: excerpt from a published article, with 3 figures and 1 table
Learning to Purification for Unsupervised Person Re-identification
Creators: name: Lan, Long
name: Teng, Xiao
name: Zhang, Jing
name: Zhang, Xiang
name: Tao, Dacheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Unsupervised person re-identification is a challenging and promising task in computer vision. Nowadays unsupervised person re-identification methods have achieved great progress by training with pseudo labels. However, how to purify feature and label noise is less explicitly studied in the unsupervised manner. To purify the feature, we take into account two types of additional features from different local views to enrich the feature representation. The proposed multi-view features are carefully integrated into our cluster contrast learning to leverage more discriminative cues that the global feature easily ignored and biased. To purify the label noise, we propose to take advantage of the knowledge of teacher model in an offline scheme. Specifically, we first train a teacher model from noisy pseudo labels, and then use the teacher model to guide the learning of our student model. In our setting, the student model could converge fast with the supervision of the teacher model thus reduce the interference of noisy labels as the teacher model greatly suffered. After carefully handling the noise and bias in the feature learning, our purification modules are proven to be very effective for unsupervised person re-identification. Extensive experiments on three popular person re-identification datasets demonstrate the superiority of our method. Especially, our approach achieves a state-of-the-art accuracy 85.8\% @mAP and 94.5\% @Rank-1 on the challenging Market-1501 benchmark with ResNet-50 under the fully unsupervised setting. The code will be released.
0209 Symbolism and Allusion in Matisse’s Jazz
Creators: name: Swan, Rodney T.
Publisher: name: RIHA Journal
Year: 2019

description: Henri Matisse’s images in Jazz, created during the disruption of the German Occupation of France, were embedded with symbols of cultural resistance, while his text, which he composed after the defeat of the Germans, reflected the transition to a post-Liberation France. The wartime symbols and allusions camouflaged within these images are readily revealed when consideration is given to two carefully devised interpretative filters that Matisse created. The first, a circus theme embodied in its original title Cirque, and the second, the intricate captions that Matisse accorded to each image. Enhancing the visual quality of his handwritten text with his richly drawn arabesques, he created a new text-image dynamic which gave primacy to the image. The paper reveals a congruency between the text in Jazz, which he declared had no relationship to the image, and the essay he wrote at the same time, "How I made my books”, where he articulated a principle he adopted for his other books, the rapport between the image and the literary character of the text.
description: RIHA Journal, 2019: RIHA Journal
Ereignisgeschichte und Rezeptionsgeschichte; einige eher rhapsodische Überlegungen
Creators: name: Schmidt-Biggemann, Wilhelm
Publisher: name: Aegyptiaca. Journal of the History of Reception of Ancient Egypt
Year: 2020

description: Aegyptiaca. Journal of the History of Reception of Ancient Egypt, Nr. 5 (2020): Aegyptiaca. Journal of the History of Reception of Ancient Egypt
Dynamical degrees of (pseudo)-automorphisms fixing cubic hypersurfaces
Creators: name: Blanc, Jérémy
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 37F10, 32H50, 14J50, 14E07

description: We give a way to construct group of pseudo-automorphisms of rational varieties of any dimension that fix pointwise the image of a cubic hypersurface of $P^n. These group are free products of involutions, and most of their elements have dynamical degree >1. Moreover, the Picard group of the varieties obtained is not big, if the dimension is at least 3. We also answer a question of E. Bedford on the existence of birational maps of the plane that cannot be lifted to automorphisms of dynamical degree >1, even if we compose them with an automorphism of the plane.
description: 18 pages
Faddeev eigenfunctions for point potentials in two dimensions
Creators: name: Grinevich, Piotr
name: Novikov, Roman
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present explicit formulas for the Faddeev eigenfunctions and related generalized scattering data for point (delta-type) potentials in two dimensions. In particular, we obtain the first explicit examples of such eigenfunctions with contour singularity in spectral parameter at a fixed real energy.
Strong-field scattering of two spinning black holes: Numerics versus Analytics
Creators: name: Hopper, Seth
name: Nagar, Alessandro
name: Rettegno, Piero
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present new Numerical Relativity calculations of the scattering angle $χ$ between two, equal-mass, black holes on hyperbolic-like orbits. We build upon previous work considering, for the first time, spinning black holes, with equal spins either aligned or antialigned with the orbital angular momentum. We detail the numerical techniques used in the computation of $χ$. Special care is taken in estimating error uncertainties on the quantities computed. The numerical values are compared with analytical predictions obtained using a new, state-of-the-art, effective one body model valid on generic orbits that incorporates post-Newtonian analytic information up to 5PN in the nonspinning, conservative sector and that has been additionally informed by Numerical Relativity simulations of quasi-circular coalescing black hole binaries. Our results indicate that the spin sector of the analytic model should be improved further in order to achieve satisfactory consistency with the most relativistic spinning configurations.
description: 9 pages, 4 figures. Submitted to Phys. Rev. D
The Influence of therapeutic intervention upon the experience of personal causation in adolescent boys
Creators: name: Wellington, Norman David
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: BF 632.5 W44 1978 Microfiche
subject: Control (Psychology)
subject: Neuroleptanesthesia
subject: Motivation (Psychology)
subject: Adolescent boys

description: Bibliography: p. 119-129.
Maximum Coronal Mass Ejection Speed as an Indicator of Solar and Geomagnetic Activities
Creators: name: Kilcik, A.
name: Yurchyshyn, V. B.
name: Abramenko, V.
name: Goode, P. R.
name: Gopalswamy, N.
name: Ozguc, A.
name: Rozelot, J. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the relationship between the monthly averaged maximal speeds of coronal mass ejections (CMEs), international sunspot number (ISSN), and the geomagnetic Dst and Ap indices covering the 1996-2008 time interval (solar cycle 23). Our new findings are as follows. (1) There is a noteworthy relationship between monthly averaged maximum CME speeds and sunspot numbers, Ap and Dst indices. Various peculiarities in the monthly Dst index are correlated better with the fine structures in the CME speed profile than that in the ISSN data. (2) Unlike the sunspot numbers, the CME speed index does not exhibit a double peak maximum. Instead, the CME speed profile peaks during the declining phase of solar cycle 23. Similar to the Ap index, both CME speed and the Dst indices lag behind the sunspot numbers by several months. (3) The CME number shows a double peak similar to that seen in the sunspot numbers. The CME occurrence rate remained very high even near the minimum of the solar cycle 23, when both the sunspot number and the CME average maximum speed were reaching their minimum values. (4) A well-defined peak of the Ap index between 2002 May and 2004 August was co-temporal with the excess of the mid-latitude coronal holes during solar cycle 23. The above findings suggest that the CME speed index may be a useful indicator of both solar and geomagnetic activities. It may have advantages over the sunspot numbers, because it better reflects the intensity of Earth-directed solar eruptions.
Invariants and chaos in the Volterra gyrostat without energy conservation
Creators: name: Seshadri, Ashwin K
name: Lakshmivarahan, S
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The model of the Volterra gyrostat (VG) has not only played an important role in rigid body dynamics but also served as the foundation of low-order models of many naturally occurring systems. It is well known that VG possesses two invariants, or constants of motion, corresponding to kinetic energy and squared angular momentum, giving oscillatory solutions to its equations of motion. Nine distinct subclasses of the VG have been identified, two of which the Euler gyroscope and Lorenz gyrostat are each known to have two constants. This paper characterizes quadratic invariants of the VG and each of its subclasses, showing how these enjoy two invariants even when rendered in terms of a non-invertible transformation of parameters, leading to a transformed Volterra gyrostat (TVG). If the quadratic coefficients of the TVG sum to zero, as they do for the VG, the system conserves energy. In all of these cases, the flows preserve volume. However, physical models where the quadratic coefficients do not sum to zero are ubiquitous, and characterization of invariants and the resulting dynamics for this more general class of models with volume conservation but without energy conservation is lacking. This paper provides the first such characterization for each of the subclasses of the VG in the absence of energy conservation, showing how the number of invariants depends on the number of linear feedback terms. It is shown that the gyrostat with three linear feedback terms has no invariants. The number of invariants circumscribes the possible dynamics for these three-dimensional flows, and those without any invariants are shown to admit rich dynamics including chaos. This gives rise to a broad class of three-dimensional volume conserving chaotic flows, arising naturally from model reduction techniques.
SINR: Deconvolving Circular SAS Images Using Implicit Neural Representations
Creators: name: Reed, Albert
name: Blanford, Thomas
name: Brown, Daniel C.
name: Jayasuriya, Suren
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Signal Processing (eess.SP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Circular Synthetic aperture sonars (CSAS) capture multiple observations of a scene to reconstruct high-resolution images. We can characterize resolution by modeling CSAS imaging as the convolution between a scene's underlying point scattering distribution and a system-dependent point spread function (PSF). The PSF is a function of the transmitted waveform's bandwidth and determines a fixed degree of blurring on reconstructed imagery. In theory, deconvolution overcomes bandwidth limitations by reversing the PSF-induced blur and recovering the scene's scattering distribution. However, deconvolution is an ill-posed inverse problem and sensitive to noise. We propose a self-supervised pipeline (does not require training data) that leverages an implicit neural representation (INR) for deconvolving CSAS images. We highlight the performance of our SAS INR pipeline, which we call SINR, by implementing and comparing to existing deconvolution methods. Additionally, prior SAS deconvolution methods assume a spatially-invariant PSF, which we demonstrate yields subpar performance in practice. We provide theory and methods to account for a spatially-varying CSAS PSF, and demonstrate that doing so enables SINR to achieve superior deconvolution performance on simulated and real acoustic SAS data. We provide code to encourage reproducibility of research.
Art and architecture between autonomy and heteronomy. A theoretical perspective
Creators: name: Neri, Raffaella
Publisher: name: TECHNE - Journal of Technology for Architecture and Environment
Year: 2021

description: The essay revisits the debate about the autonomy or heteronomy of art in a theoretical perspective. The departure point is the famous controversy between Togliatti and Vittorini about the role of intellectuals and the purpose of art in relation with the positions of Italian architects involved in post-war reconstruction – namely, Ernesto Rogers – their ethical and moral concerns, their civil commitment. Such debate affects architecture in a particular way, given how this art is more directly connected than others with society and reality, with the transformations of the means of production and of technology. After so many years, this debate provides an opportunity for meditation around some key issues for architectural design, such as its civil role and purposes, and the relationships among the disciplines, and between art and technology.
description: TECHNE - Journal of Technology for Architecture and Environment, TECHNE 21 (2021): Eteronomia dell'Architettura
Global bifurcation for corotating and counter-rotating vortex pairs
Creators: name: García, Claudia
name: Haziot, Susanna V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The existence of a local curve of corotating and counter-rotating vortex pairs was proven by Hmidi and Mateu in via a desingularization of a pair of point vortices. In this paper, we construct a global continuation of these local curves. That is, we consider solutions which are more than a mere perturbation of a trivial solution. Indeed, while the local analysis relies on the study of the linear equation at the trivial solution, the global analysis requires on a deeper understanding of topological properties of the nonlinear problem. For our proof, we adapt the powerful analytic global bifurcation theorem due to Buffoni and Toland, to allow for the singularity at the bifurcation point. For both the corotating and the counter-rotating pairs, along the global curve of solutions either the angular fluid velocity vanishes or the two patches self-intersect.
description: 29 pages, final version to appear
The space of immersed surfaces in a manifold
Creators: name: Randal-Williams, Oscar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 58D10, 58D29, 57R15, 55P47

description: We study the cohomology of the space of immersed genus g surfaces in a simply-connected manifold. We compute the rational cohomology of this space in a stable range which goes to infinity with g. In fact, in this stable range we are also able to obtain information about torsion in the cohomology of this space, as long as we localise away from (g-1).
description: 19 pages, 1 figure
Unconventional Josephson signatures of Majorana bound states
Creators: name: Jiang, Liang
name: Pekker, David
name: Alicea, Jason
name: Refael, Gil
name: Oreg, Yuval
name: von Oppen, Felix
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A junction between two topological superconductors containing a pair of Majorana fermions exhibits a `fractional' Josephson effect, $4π$ periodic in the superconductors' phase difference. An additional fractional Josephson effect, however, arises when the Majoranas are spatially separated by a superconducting barrier. This new term gives rise to a set of Shapiro steps which are essentially absent without Majorana modes and therefore provides a unique signature for these exotic states.
description: 4 pages + supp. material
Squaring the Welfare Circle in Europe, 1995
Creators: name: George, V.
name: Bonoli, G.
name: Taylor-Gooby, P.
Publisher: name: UK Data Service
Year: 1999

description: The purpose of this survey was to investigate the political debate about the future of welfare in Europe at a time when many commentators believe that governments will be unable to sustain current levels of welfare provision. Pressures on state welfare are increasing for a number of reasons. These include: rising numbers of elderly people who need pensions and health and social care; labour market changes leading to a sharp rise in under-employment and unemployment; changes in family structure, in particular the increasing number of one parent families; the introduction of expensive new medical technologies; the rising expectations of the public.
 At the same time there are strong pressures for constraint in welfare spending, resulting from widespread reluctance to pay higher taxes and contributions, the fiscal requirements of the Maastricht treaty and concern that high welfare spending makes European economies less competitive in the global market. The researchers of this study termed the problem of balancing these conflicting pressures Squaring the Welfare Circle.
 The research project examines the considerations that are likely to influence policy-makers through an interview survey of politicians and other key influentials.
Dynamic stresses in rigid airfield pavements during aircraft take-off
Creators: name: Akl, Fathy Abou Zekry Ahmed
Publisher: name: Engineering
Year: 1974
Subjects: subject: TL 725.3 P35 A44 1974 Microfiche
subject: Airports - Runways
subject: Pavements
subject: Stresses and strains

description: Bibliography: p. 103-108.
Designing schools in innovation scenarios
Creators: name: Fianchini, Maria
Publisher: name: TECHNE - Journal of Technology for Architecture and Environment
Year: 2021

description: Architects are being asked nowadays to interpret the expectation of school innovation. Ample room for research and further knowledge and skills is possible, starting from the evidence of the many errors made in the past in the oversight of building performance and referring to a large number of recent projects at an international level. All this, however, is not enough unless it is accompanied by openness to dialogue with the educational scholars and, above all, with the “inhabitants” of schools. This article presents a scenario on the transdisciplinary and participatory approach in the research and design of new learning environments and questions the potential and limits of innovation in school design.
description: TECHNE - Journal of Technology for Architecture and Environment, TECHNE 21 (2021): Eteronomia dell'Architettura
Edge states and anomalous SUSY in (2+1)-dimensional Maxwell Chern-Simons theory
Creators: name: Acharyya, Nirmalendu
name: Sinha, Akash
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In a $(2+1)$-dimensional Maxwell-Chern-Simons theory coupled with a fermion and a scalar, which has $\mathcal{N}=2$ SUSY in absence of the boundary, the insertion of a spatial boundary breaks the supersymmetry. We show that only a subset of the boundary conditions allowed by the self-adjointness of the Hamiltonian can preserve partial $\mathcal{N}=1$ supersymmetry, while for the remaining boundary conditions SUSY is completely broken. In the latter case, we demonstrate two distinct SUSY-breaking mechanisms. For some of the SUSY-breaking boundary conditions, the SUSY variation of the action does not vanish which explicitly breaks SUSY. While for certain other boundary conditions, despite the invariance of action under SUSY transformations, unpaired fermionic edge states in the domain of the Hamiltonian leads to an anomalous breaking of the supersymmetry.
description: 9 Pages; Minor corrections
Prediction of Astrometric Microlensing Events during the Gaia Mission
Creators: name: Proft, Svea
name: Demleitner, Markus
name: Wambsganss, Joachim
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We identify stars with large proper motions that are potential candidates for the astrometric microlensing effect during the Gaia mission i.e. between 2012 and 2019. The effect allows a precise measurement of the mass of a single star that is acting as a lens. We construct a candidate list by combining information from several input catalogs including PPMXL, LSPM, PPMX, OGLEBG, and UCAC3. The selection of the microlensing candidates includes the verification of their proper motions as well as the calculation of the centroid shift of the source resulting from the astrometric microlensing effect. The assembled microlensing catalog comprises 1118 candidates for the years 2012 to 2019. Our analysis demonstrates that 96% of the (high) proper motions of these candidates are erroneous. We are thus left with 43 confirmed candidates for astrometric microlensing during the expected Gaia mission. For most of them the light centroid shift is below ~100 microarcsec (assuming a dark lens) or the astrometric deviation is considerably reduced by the brightness of the lens. Due to this the astrometric microlensing effect can potentially be measured for 9 candidates that have a centroid shift between 100 and 4000 microarcsec. For 2 of these astrometric microlensing candidates we predict a strong centroid shift of about 1000 and 4000 microarcsec, respectively, that should be observable over a period of a few months up to a few years with the Gaia mission.
description: 11 pages, published in Astronomy and Astrophysics
Heteronomy of architecture and design: the teaching of Gio Ponti
Creators: name: Bagnato, Vincenzo Paolo
name: Labalestra, Antonio
Publisher: name: TECHNE - Journal of Technology for Architecture and Environment
Year: 2021

description: The celebration of the fortieth anniversary of Gio Ponti’s death offers the opportunity for in-depth study of his figure, and for renewed reflection on the whole Italian and international architectural culture. In this context, visions and ideas about modernity by the Milan architect appear emblematic and topical in relationship with the ever-changing socio-cultural conditions of our time. The new paradigm of design culture, with special reference to technology and industrial design, rediscover in Ponti’s figure important lessons concerning the even more heteronymous and hybrid condition of architecture, as long as they show a still possible synthesis between urban, architectural and design scale.
description: TECHNE - Journal of Technology for Architecture and Environment, TECHNE 21 (2021): Eteronomia dell'Architettura
On representations of complex reflection groups G(m,1,n)
Creators: name: Ogievetsky, O. V.
name: d'Andecy, L. Poulain
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: An inductive approach to the representation theory of the chain of the complex reflection groups G(m,1,n) is presented. We obtain the Jucys-Murphy elements of G(m,1,n) from the Jucys--Murphy elements of the cyclotomic Hecke algebra, and study their common spectrum using representations of a degenerate cyclotomic affine Hecke algebra. Representations of G(m,1,n) are constructed with the help of a new associative algebra whose underlying vector space is the tensor product of the group ring of G(m,1,n) with a free associative algebra generated by the standard m-tableaux.
description: 18 pages
Identification of weakly- to strongly-turbulent three-wave processes in a micro-scale system
Creators: name: Orosco, Jeremy
name: Connacher, William
name: Friend, James
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We find capillary wave turbulence (WT) to span multiple dynamical regimes and geometries -- from weakly to strongly nonlinear WT (SWT) and from shallow to deep domains -- all within a 40uL volume millifluidic system. This study is made viable with recent advances in ultra-high-speed digital holographic microscopy, providing 10-us time and 10-nm spatial resolutions for images across the entire field of view, and encompassing a complete wave system at speeds sufficient to capture the salient wave phenomena. We provide a set of tractable parameters that identify the four fundamental WT regimes present in this simple system. A proposed nonlinearity measure permits comparative analysis while varying input conditions. This work augments current understanding of WT regimes and behaviors, and directly applies to many fields beyond fluid mechanics. For example, SWT appears upon the fluid interface at powers less than required for atomization, indicating that further study of SWT is needed to properly understand ultrasound-driven fuel spray atomization and drug and agricultural nebulization.
description: revision: 10 pages, 3 figures, longer format adds theory and supporting citations
LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) The survey science plan
Creators: name: Deng, Licai
name: Newberg, Heidi Jo
name: Liu, Chao
name: Carlin, Jeffrey L.
name: Beers, Timothy C.
name: Chen, Li
name: Chen, Yuqin
name: Christlieb, Norbert
name: Grillmair, Carl J.
name: Guhathakurta, Puragra
name: Han, Zhanwen
name: Hou, Jinliang
name: Lee, Tsu-Tai
name: Lépine, Sébastien
name: Li, Jing
name: Liu, Xiaowei
name: Pan, Kaike
name: Sellwood, J. A.
name: Wang, Hongchi
name: Yang, Fan
name: Yanny, Brian
name: Zhang, Haotong
name: Zhang, Yueyang
name: Zheng, Zheng
name: Zhu, Zi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We describe the current plans for a spectroscopic survey of millions of stars in the Milky Way galaxy using the Guo Shou Jing Telescope (GSJT, formerly the Large Area Multi-Object Spectroscopic Telescope - LAMOST). The survey will obtain spectra for 2.5 million stars brighter than $r<19$ during dark/grey time, and 5 million stars brighter than $r<17$ or $J<16$ on nights that are moonlit or have low transparency. The survey will begin in fall of 2012, and will run for at least four years. The telescope design constrains the optimal declination range for observations to $10^\circ
description: 19 pages, 1 figure, accepted for publication in RAA