cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Alloy Alchemy: Cyclic Behavior of Vertical Shear Links Explored
Creators: name: Elgammal, Ahmed
Publisher: name: Zenodo
Year: 2019
Subjects: subject: Structural engineering

description: This presentation explored the dynamic behavior of vertical shear links made from four different metallic alloys—steel, stainless steel, magnesium, and copper—under cyclic loading conditions. The session provided a comparative analysis of these alloys, examining their performance, durability, and effectiveness in structural applications. Key findings highlighted how each alloy responded to cyclic loads, including their energy dissipation capacity, deformation characteristics, and overall resilience. Attendees gained valuable insights into the advantages and limitations of using these materials in construction, paving the way for more informed decisions in engineering and design.
title: The regression discontinuity design (LIEPP Fiches méthodologiques / LIEPP Methods briefs, n°14)
Creators: name: Fougère, Denis
name: Jacquemet, Nicolas
Publisher: name: Sciences Po - LIEPP
Year: 2023
Subjects: classificationCode: 5
subject: FOS: Social sciences

description: The regression discontinuity design is a quasi-experimental quantitative method that assesses the impact of an intervention by comparing observations that are close to an eligibility threshold fixed by the authorities in charge of the policy under study. The existence of such a threshold (for instance, becoming eligible to a policy at a certain age or below a certain income level) generates a treatment group and a control group, in a manner similar to an experimental approach.
Density-operator theory of orbital magnetic susceptibility in periodic insulators
Creators: name: Gonze, X.
name: Zwanziger, J. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The theoretical treatment of homogeneous static magnetic fields in periodic systems is challenging, as the corresponding vector potential breaks the translational invariance of the Hamiltonian. Based on density operators and perturbation theory, we propose, for insulators, a periodic framework for the treatment of magnetic fields up to arbitrary order of perturbation, similar to widely used schemes for electric fields. The second-order term delivers a new, remarkably simple, formulation of the macroscopic orbital magnetic susceptibility for periodic insulators. We validate the latter expression using a tight-binding model, analytically from the present theory and numerically from the large-size limit of a finite cluster, with excellent numerical agreement.
description: 5 pages including 2 figures; accepted for publication in Phys. Rev. B
title: La régression sur discontinuité (LIEPP Fiches méthodologiques / LIEPP Methods briefs, n°13)
Creators: name: Fougère, Denis
name: Jacquemet, Nicolas
Publisher: name: Sciences Po - LIEPP
Year: 2023
Subjects: classificationCode: 5
subject: FOS: Social sciences

description: La régression sur discontinuité est une méthode quantitative quasi-expérimentale qui évalue l’impact d’une intervention en comparant les observations qui se situent à proximité d’un seuil d’éligibilité fixé par les autorités en charge de la politique étudiée. L’existence d’un tel seuil (par exemple, l’éligibilité à la politique à partir de tel âge, ou en dessous de tel niveau de revenu) permet en effet de reconstituer un groupe cible et un groupe de contrôle, de façon analogue à une démarche expérimentale.
Practices of public procurement and the risk of corrupt behavior before and after the government transition in México
Creators: name: Falcón-Cortés, Andrea
name: Aldana, Andrés
name: Larralde, Hernán
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Corruption has a significant impact on economic growth, democracy, and inequality. It has severe consequences at the human level are incalculable. Public procurement, where public resources are used to purchase goods or services from the private sector, are particularly susceptible to corrupt practices. However, government turnover may bring significant changes in the way public contracting is done, and thus, in the levels and types of corruption involved in public procurement. In this respect, México lived a historical government transition in 2018, with the new government promising a crackdown on corruption. In this work, we analyze data from more than 1.5 million contracts corresponding from 2013 to 2020, to study to what extent this change of government affected the characteristics of public contracting, and we try to determine whether these changes affect how corruption takes place. To do this, we propose a statistical framework to compare the characteristics of the contracting practices within each administration, separating the contracts in different classes depending on whether or not they were made with companies that have now been identified as being involved in corrupt practices. We find that while the amount of resources spent with companies that turned out to be corrupt has decreased substantially, many of the patterns followed to contract these companies were maintained, and some of those in which changes did occur, are suggestive of a larger risk of corruption.
description: 20 pages of main text and 15 of supplementary material. This manuscript has been accepted in EPJ Data Science on the special issue Data Science Perspectives on Economic Crime
Existence of Hamiltonians for Some Singular Interactions on Manifolds
Creators: name: Doğan, Çağlar
name: Erman, Fatih
name: Turgut, O. Teoman
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The existence of the Hamiltonians of the renormalized point interactions in two and three dimensional Riemannian manifolds and that of a relativistic extension of this model in two dimensions are proven. Although it is much more difficult, the proof of existence of the Hamiltonian for the renormalized resolvent for the non-relativistic Lee model can still be given. To accomplish these results directly from the resolvent formula, we employ some basic tools from the semigroup theory.
description: 33 pages, no figures
title: Group Interviews (LIEPP Fiches méthodologiques / LIEPP Methods briefs, n°15)
Creators: name: Halpern, Charlotte
Publisher: name: Sciences Po - LIEPP
Year: 2023
Subjects: classificationCode: 5
subject: FOS: Social sciences

description: The group interview is a qualitative method through which semi-structured interviews are conducted with several people at the same time. This method intends to artificially recreate a set of social interactions between a selected number of participants, for example different policy stakeholders. It is useful to various forms of policy evaluation, such as ex ante, ex post and process evaluation.
Exploring Head-based Mode-Switching in Virtual Reality
Creators: name: Shi, Rongkai
name: Zhu, Nan
name: Liang, Hai-Ning
name: Zhao, Shengdong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Mode-switching supports multilevel operations using a limited number of input methods. In Virtual Reality (VR) head-mounted displays (HMD), common approaches for mode-switching use buttons, controllers, and users' hands. However, they are inefficient and challenging to do with tasks that require both hands (e.g., when users need to use two hands during drawing operations). Using head gestures for mode-switching can be an efficient and cost-effective way, allowing for a more continuous and smooth transition between modes. In this paper, we explore the use of head gestures for mode-switching especially in scenarios when both users' hands are performing tasks. We present a first user study that evaluated eight head gestures that could be suitable for VR HMD with a dual-hand line-drawing task. Results show that move forward, move backward, roll left, and roll right led to better performance and are preferred by participants. A second study integrating these four gestures in Tilt Brush, an open-source painting VR application, is conducted to further explore the applicability of these gestures and derive insights. Results show that Tilt Brush with head gestures allowed users to change modes with ease and led to improved interaction and user experience. The paper ends with a discussion on some design recommendations for using head-based mode-switching in VR HMD.
Sedimentology, petrololgy and permeability characterization of the Upper Cretaceious Virgelle member, Milk River formation, Writing-On-Stone Provincial Park, Alberta, Canada
Creators: name: Meyer, Rudolf
Publisher: name: University of Calgary
Year: 1998
Subjects: subject: QE688 .M49 1998A
subject: Additional Copy: QE688 .M49 1998 in the Gallagher Library of Geology and Geophysics
subject: Sedimentation and deposition
subject: Formations (Geology) - Alberta - Writing-on-Stone Provincial Park
subject: Milk River Formation (Alta.)
subject: Petrology - Alberta
subject: Permeability

description: Bibliography: p. 340-361
Complementarity and phases in SU(3)
Creators: name: de Guise, H.
name: Vourdas, A.
name: Sanchez-Soto, L. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Phase operators and phase states are introduced for irreducible representations of the Lie algebra su(3) using a polar decomposition of ladder operators. In contradistinction with su(2), it is found that the su(3) polar decomposition does not uniquely determine a Hermitian phase operator. We describe two possible ways of proceeding: one based in imposing SU(2) invariance and the other based on the idea of complementarity. The generalization of these results to SU(n) is sketched.
description: Published as part of a special issue on coherent states
Advances in Atomic Data for Neutron-Capture Elements
Creators: name: Sterling, N. C.
name: Witthoeft, M. C.
name: Esteves, D. A.
name: Stancil, P. C.
name: Kilcoyne, A. L. D.
name: Bilodeau, R. C.
name: Aguilar, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Neutron(n)-capture elements (atomic number Z>30), which can be produced in planetary nebula (PN) progenitor stars via s-process nucleosynthesis, have been detected in nearly 100 PNe. This demonstrates that nebular spectroscopy is a potentially powerful tool for studying the production and chemical evolution of trans-iron elements. However, significant challenges must be addressed before this goal can be achieved. One of the most substantial hurdles is the lack of atomic data for n-capture elements, particularly that needed to solve for their ionization equilibrium (and hence to convert ionic abundances to elemental abundances). To address this need, we have computed photoionization cross sections and radiative and dielectronic recombination rate coefficients for the first six ions of Se and Kr. The calculations were benchmarked against experimental photoionization cross section measurements. In addition, we computed charge transfer (CT) rate coefficients for ions of six n-capture elements. These efforts will enable the accurate determination of nebular Se and Kr abundances, allowing robust investigations of s-process enrichments in PNe.
description: To be published in IAU Symp. 283: Planetary Nebulae, an Eye to the Future; 2 pages
title: Entretiens de groupe (LIEPP Fiches méthodologiques / LIEPP Methods briefs, n°16)
Creators: name: Halpern, Charlotte
Publisher: name: Sciences Po - LIEPP
Year: 2023
Subjects: classificationCode: 5
subject: FOS: Social sciences

description: L'entretien de groupe est une méthode qualitative par laquelle un entretien semi-directif est mené avec plusieurs personnes en même temps. Cette méthode a pour résultat de créer artificiellement un ensemble d'interactions sociales entre un nombre sélectionné de participants, par exemple différents acteurs de la politique. Elle est utile à diverses formes d'évaluation des politiques publiques, notamment l’évaluation ex ante, ex post et de processus.
Comments on Gaugino Screening
Creators: name: Cohen, Timothy
name: Hook, Anson
name: Wecht, Brian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Gauge mediated models of supersymmetry breaking often exhibit "gaugino screening," where to leading order in F, gaugino masses are unaffected by higher dimensional Kahler potential interactions between the supersymmetry breaking spurion and the messengers. We provide a derivation of this phenomenon which utilizes the gaugino counterterm originally proposed in the context of anomaly mediation by Dine and Seiberg. We argue that this counterterm is present when there are non-zero messenger F-terms, and can cancel the leading order Feynman diagram contribution to the gaugino mass. We provide a nontrivial check of the regulator independence of our results by performing the computation using both dimensional reduction and Pauli-Villars. This analysis reconciles an apparent contradiction between diagrammatics and analytic continuation into superspace.
description: 6 pages, 1 figure
Buffer gas-assisted polarization spectroscopy of 6Li
Creators: name: Ohtsubo, Nozomi
name: Aoki, Takatoshi
name: Torii, Yoshio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on the demonstration of Doppler-free polarization spectroscopy of the D2 line of 6Li atoms. Counterintuitively, the presence of an Ar buffer gas, in a certain pressure range, causes a drastic enhancement of the polarization rotation signal. The observed dependence of the signal amplitude on the Ar buffer pressure and the pump laser power is reproduced by calculations based on simple rate equations. We performed stable laser frequency locking using a dispersion signal obtained by polarization spectroscopy for laser cooling of 6Li atoms.
How Deep the Theory of Quantum Communications Goes: Superadditivity, Superactivation and Causal Activation
Creators: name: Koudia, Seid
name: Cacciapuoti, Angela Sara
name: Simonov, Kyrylo
name: Caleffi, Marcello
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In the theory of quantum communications, a deeper structure has been recently unveiled, showing that the capacity does not completely characterize the channel ability to transmit information due to phenomena -- namely, superadditivity, superactivation and causal activation -- with no counterpart in the classical world. Although how deep goes this structure is yet to be fully uncovered, it is crucial for the communication engineering community to own the implications of these phenomena for understanding and deriving the fundamental limits of communications. Hence, the aim of this treatise is to shed light on these phenomena by providing the reader with an easy access and guide towards the relevant literature and the prominent results from a communication engineering perspective.
Momentum-resolved Raman spectroscopy of non-interacting ultracold Fermi gas
Creators: name: Wang, Pengjun
name: Fu, Zhengkun
name: Huang, Lianghui
name: Zhang, Jing
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We report the experiment on probing the one-body spectral function in a trapped non-interacting $^{40}$K Fermi gas by means of the momentum-resolved Raman spectroscopy The experimental result is in good agreement with the expected quadratic dispersion in the non-interacting regime. Through the comparison with the radio-frequency spectrum, we found that the Raman spectrum shows some new characteristics.
description: 4 pages, 2 figures, appear in Phys. Rev. A
Effect of finite Reynolds number on self-similar crossing statistics and fractal measurements in turbulence
Creators: name: Heisel, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Stochastic simulations are used to create synthetic one-dimensional telegraph approximation (TA) signals based on turbulent zero crossings, where the interval between crossings is governed by a power law probability distribution with exponent $α$. The power law exponent is determined for statistics of simulated TA signals, namely the box-counting fractal dimension $D_1$, energy spectrum exponent $β_{TA}$, and an intermittency exponent $μ_{TA}$. For the binary TA signal with no variability in amplitude, the parameters are related linearly as $D_1 = 2 - β_{TA} = 1 - μ_{TA}$. The relations are unchanged if the crossing interval distribution has a finite power law region (i.e. inertial subrange) representing a flow with finite Reynolds number. However, the finite distribution yields statistics that are not truly scale-invariant, and distorts the linear relation between the statistic exponents and $α$. The behavior is due to finite-size effects apparent from the survival function, or the complementary cumulative distribution, which for finite Reynolds number is only approximately self-similar and has an effective exponent differing from $α$. An expression presented for the effective exponent recovers the expected relations between $α$ and the TA statistics. The findings demonstrate how a finite Reynolds number can affect indicators of self-similarity, fractality, and intermittency observed from single-point measurements.
description: New version (including updated title) to be published in Physical Review Fluids. No changes were made to the results or key conclusions from the original version
Self-similar geometries within the inertial subrange of scales in boundary layer turbulence
Creators: name: Heisel, Michael
name: de Silva, Charitha M.
name: Katul, Gabriel G.
name: Chamecki, Marcelo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The inertial subrange of turbulent scales is commonly reflected by a power law signature in ensemble statistics such as the energy spectrum and structure functions - both in theory and from observations. Despite promising findings on the topic of fractal geometries in turbulence, there is no accepted image for the physical flow features corresponding to this statistical signature in the inertial subrange. The present study uses boundary layer turbulence measurements to evaluate the self-similar geometric properties of velocity isosurfaces and investigate their influence on statistics for the velocity signal. The fractal dimension of streamwise velocity isosurfaces, indicating statistical self-similarity in the size of "wrinkles" along each isosurface, is shown to be constant only within the inertial subrange of scales. For the transition between the inertial subrange and production range, it is inferred that the largest wrinkles become increasingly confined by the overall size of large-scale coherent velocity regions such as uniform momentum zones. The self-similarity of isosurfaces yields power law trends in subsequent one-dimensional statistics. For instance, the theoretical 2/3 power law exponent for the structure function can be recovered by considering the collective behavior of numerous isosurface level sets. The results suggest that the physical presence of inertial subrange eddies is manifested in the self-similar wrinkles of isosurfaces.
description: 30 pages, 11 figures
Detection of LS I +61 303 in a low VHE gamma-ray emission state with the MAGIC telescopes
Creators: name: Jogler, T.
name: Blanch, O.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The gamma-ray binary system LS I +61 303 was studied in great detail in VHE gamma-rays in the last years by the MAGIC telescope. The VHE emission of the system exhibited a prominent periodic outburst in the orbital phases 0.6-0.7 between September 2005 to January 2008. In Fall 2008 the Fermi collaboration reported as well periodic emission in the MeV to GeV energy range, but with a shifted outburst in the phases 0.35-0.45. MAGIC observed again LS I+61 303 in 2009 with the twice more sensitive stereo mode to allow for detailed correlation studies between the VHE gamma-ray and Fermi/LAT energy band. Here we present our new results, which show a significant reduction in the VHE gamma-ray flux in the phase of the periodic outburst by almost one order of magnitude compared to our previous measurements. Furthermore, the 0.1-phase averaged light curve shows no significant outburst, but a rather constant flux. Here we will discuss the implications of our results for future gamma-ray studies of LS I +61 303.
description: 4 pages, 2 figures, In Proceedings of the 32nd International Cosmic Ray Conference (Beijing)
Josephson spin-valve realization in the magnetic nodal-line topological semimetal Fe$_3$GeTe$_2$
Creators: name: Shvetsov, O. O.
name: Barash, Yu. S.
name: Timonina, A. V.
name: Kolesnikov, N. N.
name: Deviatov, E. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Three-dimensional van der Waals ferromagnet Fe$_3$GeTe$_2$ (FGT) is regarded as a candidate for the magnetic topological nodal line semimetal. We investigate lateral electron transport between two 3~$μ$m spaced superconducting In leads beneath a thick three-dimensional FGT exfoliated flake. At low 30~mK temperature, we observe Josephson supercurrent that exhibits unusual critical current $I_c$ suppression by the magnetic field $B$. The overall $I_c(B)$ pattern is asymmetric in respect to the B sign. We demonstrate, that the asymmetry is defined by the magnetic field sweep direction, so the $I_c(B)$ pattern is strictly reversed (as $B$ to $-B$ inversion) for the opposite sweeps. We also observe an interplay between maximum and minimum in $I_c(B)$ in normal magnetic fields, while there are fast aperiodic $I_c(B)$ fluctuations for the in-plane ones. These effects can not be expected for homogeneous superconductor-ferromagnet-superconductor junctions, while they are known for Josephson spin valves. The mostly possible scenario for Josephson spin valve realization in FGT is the misalignment of spin polarizations of the Fermi arc surface states and ferromagnetic FGT bulk, but we also discuss possible influence of spin-dependent transport between magnetic domains.
MPEC 2023-W129 : 2016 HC3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Combinatorial Reciprocity Theorems
Creators: name: Beck, Matthias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A15, 05C15, 05C31, 11H06, 52C07, 52C35

description: A common theme of enumerative combinatorics is formed by counting functions that are polynomials evaluated at positive integers. In this expository paper, we focus on four families of such counting functions connected to hyperplane arrangements, lattice points in polyhedra, proper colorings of graphs, and $P$-partitions. We will see that in each instance we get interesting information out of a counting function when we evaluate it at a \emph{negative} integer (and so, a priori the counting function does not make sense at this number). Our goals are to convey some of the charm these "alternative" evaluations of counting functions exhibit, and to weave a unifying thread through various combinatorial reciprocity theorems by looking at them through the lens of geometry, which will include some scenic detours through other combinatorial concepts.
description: 15 pages, to appear in Jahresbericht der DMV
MPEC 2023-W130 : 2022 BA
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Kunstbesitz - Lust oder Last? Gedanken, wie man die Lust erhöhen und gleichzeitig die Last verringern kann
Creators: name: Gumppenberg, Georg Von
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. 2 (1998): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Styrylquinazoline derivatives as ABL inhibitors selective for different DFG orientations
Creators: name: Malarz, Katarzyna
name: Mularski, Jacek
name: Pacholczyk, Marcin
name: Musiol, Robert
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 60506 Virology

description: Among tyrosine kinase inhibitors, quinazoline-based compounds represent a large and well-known group of multi-target agents. Our previous studies have shown interesting kinases inhibition activity for a series of 4-aminostyrylquinazolines based on the CP-31398 scaffold. Here, we synthesised a new series of styrylquinazolines with a thioaryl moiety in the C4 position and evaluated in detail their biological activity. Our results showed high inhibition potential against non-receptor tyrosine kinases for several compounds. Molecular docking studies showed differential binding to the DFG conformational states of ABL kinase for two derivatives. The compounds showed sub-micromolar activity against leukaemia. Finally, in-depth cellular studies revealed the full landscape of the mechanism of action of the most active compounds. We conclude that S4-substituted styrylquinazolines can be considered as a promising scaffold for the development of multi-kinase inhibitors targeting a desired binding mode to kinases as effective anticancer drugs.
Eigenvalues of the Sturm-Liouville problem with a frozen argument on time scales
Creators: name: Durna, Zeynep
name: Ozkan, A. Sinan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this study, we consider a boundary value problem generated by the Sturm-Liouville problem with a frozen argument and with non-separated boundary conditions on a time scale. Firstly, we present some solutions and characteristic function of the problem on an arbitrary bounded time scale. Secondly, we prove some properties of eigenvalues and obtain a formulation for the eigenvalues-number on a finite time scale. Finally, we give an asymptotic formula for eigenvalues of the problem on another special time scale.
Career development of first-year university students: a test of Astin's career development model
Creators: name: Hoi, Mandy Man-Nor
Publisher: name: University of Calgary
Year: 1998
Subjects: subject: LC1037.8 .C3 H65 1998
subject: Additional Copy: 370 EDC 1998 HOI in the Doucette Education Library
subject: Career education - Canada.
subject: College students - Employment.

description: Bibliography: p. 104-126
description: UARC
[Annoncen]
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. 39 Nr. 2 (1998): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Heading Estimation Using Ultra-Wideband Received Signal Strength and Gaussian Processes
Creators: name: Lisus, Daniil
name: Cossette, Charles Champagne
name: Shalaby, Mohammed
name: Forbes, James Richard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: It is essential that a robot has the ability to determine its position and orientation to execute tasks autonomously. Heading estimation is especially challenging in indoor environments where magnetic distortions make magnetometer-based heading estimation difficult. Ultra-wideband (UWB) transceivers are common in indoor localization problems. This letter experimentally demonstrates how to use UWB range and received signal strength (RSS) measurements to estimate robot heading. The RSS of a UWB antenna varies with its orientation. As such, a Gaussian process (GP) is used to learn a data-driven relationship from UWB range and RSS inputs to orientation outputs. Combined with a gyroscope in an invariant extended Kalman filter, this realizes a heading estimation method that uses only UWB and gyroscope measurements.
description: 6 pages, 9 figures, accepted to Robotics and Automation Letters, presented at IROS 2021
Neutron star properties and the symmetry energy
Creators: name: Cavagnoli, Rafael
name: Providência, Constança
name: Menezes, Debora P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The effect of the symmetry energy on the properties of compact stars is discussed. It is shown that, for stars with masses above 1 $M_\odot$, the radius of the star varies linearly with the symmetry energy slope $L$. The dependence of the hyperon content and onset density of the direct Urca process on the symmetry energy and meson coupling parametrization are also analyzed.
description: 12 pages, 20 figures, submitted to Phyical Review C
Introducing LASSO-type penalisation to generalised joint regression modelling for count data
Creators: name: Van Der Wurp, Hendrik
name: Groll, Andreas
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: Count data regression
subject: FIFA world cups
subject: Football penalisation
subject: Joint modelling
subject: Regularisation
subject: 310

description: In this work, we propose an extension of the versatile joint regression framework for bivariate count responses of the R package GJRM by Marra and Radice (R package version 0.2-3, 2020) by incorporating an (adaptive) LASSO-type penalty. The underlying estimation algorithm is based on a quadratic approximation of the penalty. The method enables variable selection and the corresponding estimates guarantee shrinkage and sparsity. Hence, this approach is particularly useful in high-dimensional count response settings. The proposal’s empirical performance is investigated in a simulation study and an application on FIFA World Cup football data.
description: AStA advances in statistical analysis;Vol. 107. 2023, pp 127-151
Spatially-Resolved Nonthermal Line Broadening During The Impulsive Phase of a Solar Flare
Creators: name: Milligan, Ryan O.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper presents a detailed study of excess line broadening in EUV emission lines during the impulsive phase of a C-class solar flare. In this work, which utilizes data from the EUV Imaging Spectrometer (EIS) onboard Hinode, the broadened line profiles were observed to be co-spatial with the two HXR footpoints as observed by RHESSI. By plotting the derived nonthermal velocity for each pixel within the Fe XV and Fe XVI rasters against its corresponding Doppler velocity a strong correlation (|r| > 0.59) was found between the two parameters for one of the footpoints. This suggested that the excess broadening at these temperatures is due to a superposition of flows (turbulence), presumably as a result of chromospheric evaporation due to nonthermal electrons. Also presented are diagnostics of electron densities using five pairs of density-sensitive line ratios. Density maps derived using the Mg XII and Si X line pairs showed no appreciable increase in electron density at the footpoints, while the Fe XII, Fe XIII, and Fe XIV line pairs revealed densities approaching 10^(11.5) cm^(-3). Using this information, the nonthermal velocities derived from the widths of the two Fe XIV lines were plotted against their corresponding density values derived from their ratio. This showed that pixels with large nonthermal velocities were associated with pixels of moderately higher densities. This suggests that nonthermal broadening at these temperatures may have been due to enhanced densities at the footpoints, although estimates of the amount of opacity broadening and pressure broadening appeared to be negligible.
description: 11 pages, 10 figures. Accepted to ApJ
Learning in Sinusoidal Spaces with Physics-Informed Neural Networks
Creators: name: Wong, Jian Cheng
name: Ooi, Chinchun
name: Gupta, Abhishek
name: Ong, Yew-Soon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: A physics-informed neural network (PINN) uses physics-augmented loss functions, e.g., incorporating the residual term from governing partial differential equations (PDEs), to ensure its output is consistent with fundamental physics laws. However, it turns out to be difficult to train an accurate PINN model for many problems in practice. In this paper, we present a novel perspective of the merits of learning in sinusoidal spaces with PINNs. By analyzing behavior at model initialization, we first show that a PINN of increasing expressiveness induces an initial bias around flat output functions. Notably, this initial solution can be very close to satisfying many physics PDEs, i.e., falling into a local minimum of the PINN loss that only minimizes PDE residuals, while still being far from the true solution that jointly minimizes PDE residuals and the initial and/or boundary conditions. It is difficult for gradient descent optimization to escape from such a local minimum trap, often causing the training to stall. We then prove that the sinusoidal mapping of inputs, in an architecture we label as sf-PINN, is effective to increase input gradient variability, thus avoiding being trapped in such deceptive local minimum. The level of variability can be effectively modulated to match high-frequency patterns in the problem at hand. A key facet of this paper is the comprehensive empirical study that demonstrates the efficacy of learning in sinusoidal spaces with PINNs for a wide range of forward and inverse modelling problems spanning multiple physics domains.
description: 16 pages, 13 figures
Real-time Nonlinear MPC Strategy with Full Vehicle Validation for Autonomous Driving
Creators: name: Allamaa, Jean Pierre
name: Listov, Petr
name: Van der Auweraer, Herman
name: Jones, Colin
name: Son, Tong Duy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we present the development and deployment of an embedded optimal control strategy for autonomous driving applications on a Ford Focus road vehicle. Non-linear model predictive control (NMPC) is designed and deployed on a system with hard real-time constraints. We show the properties of sequential quadratic programming (SQP) optimization solvers that are suitable for driving tasks. Importantly, the designed algorithms are validated based on a standard automotive XiL development cycle: model-in-the-loop (MiL) with high fidelity vehicle dynamics, hardware-in-the-loop (HiL) with vehicle actuation and embedded platform, and full vehicle-hardware-in-the-loop (VeHiL). The autonomous driving environment contains both virtual simulation and physical proving ground tracks. NMPC algorithms and optimal control problem formulation are fine-tuned using a deployable C code via code generation compatible with the target embedded toolchains. Finally, the developed systems are applied to autonomous collision avoidance, trajectory tracking, and lane change at high speed on city/highway and low speed at a parking environment.
description: This paper appears in the proceedings of the 2022 American Control Conference (ACC)
PHNNs: Lightweight Neural Networks via Parameterized Hypercomplex Convolutions
Creators: name: Grassucci, Eleonora
name: Zhang, Aston
name: Comminiello, Danilo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Hypercomplex neural networks have proven to reduce the overall number of parameters while ensuring valuable performance by leveraging the properties of Clifford algebras. Recently, hypercomplex linear layers have been further improved by involving efficient parameterized Kronecker products. In this paper, we define the parameterization of hypercomplex convolutional layers and introduce the family of parameterized hypercomplex neural networks (PHNNs) that are lightweight and efficient large-scale models. Our method grasps the convolution rules and the filter organization directly from data without requiring a rigidly predefined domain structure to follow. PHNNs are flexible to operate in any user-defined or tuned domain, from 1D to $n$D regardless of whether the algebra rules are preset. Such a malleability allows processing multidimensional inputs in their natural domain without annexing further dimensions, as done, instead, in quaternion neural networks for 3D inputs like color images. As a result, the proposed family of PHNNs operates with $1/n$ free parameters as regards its analog in the real domain. We demonstrate the versatility of this approach to multiple domains of application by performing experiments on various image datasets as well as audio datasets in which our method outperforms real and quaternion-valued counterparts. Full code is available at: https://github.com/eleGAN23/HyperNets.
description: Submitted to IEEE Transactions on Neural Networks and Learning Systems
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: Di Bella, Zsuzsanna Ilona Katalin de Jármy
name: Girão, Manoel João Batista Castello
name: Fonseca, Marcelo Cunio Machado
Publisher: name: Taylor & Francis
Year: 2023
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.
Expected performance of interferometric air-shower measurements with radio antennas
Creators: name: Schlüter, Felix
name: Huege, Tim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Interferometric measurements of the radio emission of extensive air showers allow reconstructing cosmic-ray properties. A recent simulation study with an idealised detector promised measurements of the depth of the shower maximum $X_\mathrm{max}$ with an accuracy better than 10$\,$g$\,$cm$^{-2}$. In this contribution, we evaluate the potential of interferometric $X_\mathrm{max}$ measurements of (simulated) inclined air showers with realistically dimensioned, sparse antenna arrays. We account for imperfect time synchronisation between individual antennas and study its inter-dependency with the antenna density in detail. We find a strong correlation between the antenna multiplicity (per event) and the maximum acceptable inaccuracy in the time synchronisation of individual antennas. From this result, prerequisites for the design of antenna arrays for the application of interferometric measurements can be concluded. For data recorded with a time synchronisation accurate to 1$\,$ns within the commonly used frequency band of 30$\,$MHz to 80$\,$MHz, an antenna multiplicity of $\gtrsim 50$ is needed to achieve an $X_\mathrm{max}$ reconstruction with an accuracy of 20$\,$g$\,$cm$^{-2}$. This multiplicity is achieved measuring inclined air showers with zenith angles $θ\geq 77.5^\circ$ with 1$\,$km spaced antenna arrays, while vertical air showers with zenith angles $θ\leq 40^\circ$ require an antenna spacing below 100$\,$m. Furthermore, we find no improvement in $X_\mathrm{max}$ resolution applying the interferometric reconstruction to measurements at higher frequencies, i.e., up to several hundred MHz.
Generating Multivariate Load States Using a Conditional Variational Autoencoder
Creators: name: Wang, Chenguang
name: Sharifnia, Ensieh
name: Gao, Zhi
name: Tindemans, Simon H.
name: Palensky, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: For planning of power systems and for the calibration of operational tools, it is essential to analyse system performance in a large range of representative scenarios. When the available historical data is limited, generative models are a promising solution, but modelling high-dimensional dependencies is challenging. In this paper, a multivariate load state generating model on the basis of a conditional variational autoencoder (CVAE) neural network is proposed. Going beyond common CVAE implementations, the model includes stochastic variation of output samples under given latent vectors and co-optimizes the parameters for this output variability. It is shown that this improves statistical properties of the generated data. The quality of generated multivariate loads is evaluated using univariate and multivariate performance metrics. A generation adequacy case study on the European network is used to illustrate model's ability to generate realistic tail distributions. The experiments demonstrate that the proposed generator outperforms other data generating mechanisms.
description: 8 pages, 5 figures, 1 table
Castellologica bohemica, Bd. 2
Creators: name: Meckseper, Cord
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: Rezension zu: Castellologica bohemica, Bd. 2, Praha 1991, Verantwortl. Redakteur: Tomáš Durdík. Alle Beiträge mit deutschem Resümee. 398 S. m. zahlt; Abb. und Plänen. 16 Fototafeln als Beilage. - Bezugsadresse: Československá Akademie Vĕd - Archeologický ústav - (Tschechoslowak. Akad. d. Wiss. - Archäologisches Inst. -). CS-118 01 Praha 1, Malá Strana, Letenská 4.
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 33 Nr. 2 (1992): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
An alternative formalism for modeling spin
Creators: name: Powers, Sam
name: Stojkovic, Dejan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present an alternative formalism for modeling spin. The ontological elements of this formalism are base-2 sequences of length $n$. The machinery necessary to model physics is then developed by considering correlations between base-2 sequences. Upon choosing a reference base-2 sequence, a relational system of numbers can be defined, which we interpret as quantum numbers. Based on the properties of these relational quantum numbers, the selection rules governing interacting spin systems are derived from first principles. A tool for calculating the associated probabilities, which are the squared Clebsch-Gordan coefficients in quantum mechanics, is also presented. The resulting model offers a vivid information theoretic picture of spin and interacting spin systems. Importantly, this model is developed without making any assumptions about the nature of space-time, which presents an interesting opportunity to study emergent space-time models.
description: 13 pages, 6 figures, updated title, several major section updates