cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effective Hamiltonian for fluid membranes in the presence of long-ranged forces
Creators: name: Dutka, F.
name: Napiorkowski, M.
name: Dietrich, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: If the constituent particles of fluid phases interact via long-ranged van der Waals forces, the effective Hamiltonian for \emph{interfaces} between such fluid phases contains - in lateral Fourier space - non-analytic terms $ \sim q^4 \ln q$. Similar non-analytic terms characterize the effective Hamiltonian for two interacting interfaces which can emerge between the three possible coexisting fluid phases in binary liquid mixtures. This is in contrast with the structure of the phenomenological Helfrich Hamiltonian for membranes which does not contain such non-analytic terms. We show that under favorable conditions for the bulk densities characterizing a binary liquid mixture and for the long-ranged interparticle interactions the corresponding effective Hamiltonian for a model fluid \emph{membrane} does not exhibit such non-analytic contributions. We discuss the properties of the resulting effective Hamiltonian, with a particular emphasis on the influence of the long range of the interactions on the coefficient of the bending rigidity.
description: 12 pages, 1 figure
Constant-length substitutions and countable scrambled sets
Creators: name: Blanchard, François
name: Durand, Fabien
name: Maass, Alejandro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B05

description: In this paper we provide examples of topological dynamical systems having either finite or countable scrambled sets. In particular we study conditions for the existence of Li-Yorke, asymptotic and distal pairs in constant--length substitution dynamical systems. Starting from a circle rotation we also construct a dynamical system having Li--Yorke pairs, none of which is recurrent.
Investigating And Analyzing Effective Strategies Employed by Canadian Universities In  Mitigating Mental Stress In International Students.
Creators: Pooja Malhotra
Publisher: name: University of Alberta Library
Year: 2023

This comprehensive study examines how Canadian universities play a role in mitigating international student mental stress. The study examines international students' pressures, barriers to mental health support, coping techniques, and Canadian universities' effective well-being programs. The study findings show that academic challenges, cultural changes, and social isolation are international students' main concerns. Stressors impact

academic performance, social integration, and satisfaction. According to the literature review, overseas students suffer linguistic challenges, mental health stigma, and limited understanding of support options when seeking help. International students' coping techniques show that social support, mindfulness, and smart use of university resources improve resilience and well-being. The study also discusses Canadian universities' successful mental health awareness initiatives, peer support programs, culturally appropriate counseling, and more. This promotes theory development and education field enhancement, providing a framework for international student mental health and informing Canadian university policies and resource allocation. Additionally, the insights presented can help institutions worldwide improve the mental well-being of their international students, creating a more inclusive and supportive higher education environment.
Corrigendum and addendum to: Linearly recurrent subshifts have a finite number of non-periodic factors
Creators: name: Durand, Fabien
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B10

description: We prove that a subshift $(X,T)$ is linearly recurrent if and only if it is a primitive and proper $S$-adic subshift. This corrects Proposition 6 in F. Durand ({\it Ergod. Th. & Dynam. Sys. {\bf 20}} (2000), 1061--1078).
Comparisons between isothermal and NFW mass profiles for strong-lensing galaxy clusters
Creators: name: Shu, Chenggang
name: Zhou, Binglu
name: Bartelmann, Matthias
name: Comerford, Julia M.
name: Huang, J. -S.
name: Mellier, Yannick
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: While both isothermal and NFW-based mass models for galaxy clusters are widely adopted in strong-lensing studies, they cannot easily be distinguished based solely on observed positions of arcs and arclets. We compare the magnifications predicted for giant arcs obtained from isothermal and NFW profiles, taking axially-symmetric and asymmetric mass distributions into account. We find that arc magnifications can differ strongly between the two types of density profiles even if the image morphology is well reproduced. Magnifications by lenses with NFW density profiles are usually larger than those for lenses with singular or nearly singular isothermal density profiles, unless the latter have large cores. Asymmetries play an important role. We illustrate our results with the two well-studied clusters MS 2137 and A~370. We confirm earlier results showing that both isothermal and NFW mass models can very well reproduce the observed arcs, radial arcs and other arclets. While the mass model for MS 2137 is not very well constrained, the two types of mass models produce strongly differing critical curves and caustics for A~370. We find that the NFW mass profile is preferred for A~370. We identify new arclet candidates in the field of A~370. Redshift estimates allowed by the lens model are consistent with results in the literature, where available. Three newly found counter-images are suggested to arise from an active, dust-enshrouded star-forming galaxy at $z\approx1.1$.
description: 11 pages, 15 figures; accepted for publication in ApJ
Letter from Kathleen Raine to Robin Skelton, October 11, [between 1953 and 1990]
Creators: name: Raine, Kathleen, 1908-2003
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Book industries and trade
valueUri: http://id.worldcat.org/fast/836171
subject: Editors
valueUri: http://id.worldcat.org/fast/902475
subject: Neoplatonism
valueUri: http://id.worldcat.org/fast/1035884
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Platonists
valueUri: http://id.worldcat.org/fast/1066881
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: English poetry--Manuscripts
valueUri: http://id.worldcat.org/fast/912320
subject: Wiccans
valueUri: http://id.worldcat.org/fast/1765210
subject: Philosophy
valueUri: http://id.worldcat.org/fast/1060777
subject: FOS: Philosophy, ethics and religion
subject: Periodicals--Publishing
valueUri: http://id.worldcat.org/fast/1058100
subject: Skelton, Robin
valueUri: http://id.worldcat.org/fast/51853
subject: Periodical editors
valueUri: http://id.worldcat.org/fast/1058064
subject: Raine, Kathleen, 1908-2003
valueUri: http://id.worldcat.org/fast/52672
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Critics
valueUri: http://id.worldcat.org/fast/883769
subject: Scholars
valueUri: http://id.worldcat.org/fast/1106878

description: Part of a collection of correspondence from Kathleen Raine to Robin Skelton. Skelton was a British poet, academic, anthologist, and practicing Wiccan. He taught at Manchester University before emigrating to Canada in 1963, where he taught creative writing at the University of Victoria and started the literary magazine The Malahat Review. Also included are some letters to Skelton’s wife Sylvia, and his daughters. Spanning close to forty-five years, the correspondence discusses poetry, writing, and philosophy; particularly Platonism and Neoplatonism. Raine often refers to the writings of William Blake and W. B. Yeats. Many letters also mention contemporary literary figures at the time including: Herbert Read, Peter Russell, Liam Miller, and Thurairajah Tambimuttu. In this letter, Raine reviews the latest issue of The Malahat Review and discusses mutual acquaintances.
High-Chern number phase in the topological insulator multilayer structures
Creators: name: Wang, Yi-Xiang
name: Li, Fuxiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The high-Chern number phases with a Chern number C>1 have been observed in a recent experiment that performed on the topological insulator (TI) multilayer structures, consisting of the alternating magnetic-doped and undoped TI layers. In this paper, we develop an effective method to determine the Chern numbers in the TI multilayer structures and then make a systematic study on the Chern number phase diagrams that are modulated by the magnetic doping and the middle layer thickness. We point out that in the multilayer structure, the high-C behavior can be attributed to the band inversion mechanisms. Moreover, we find that the lowest bands may be multifold degenerate around the Gamma point, and when they are inverted, the Chern number change will be larger than one. Besides the TI multilayer structures implemented in the experiment, we also explore the high-C phase realizations in two other kinds of the TI multilayer structures. The implications of our results for experiments are discussed.
description: 10 pages, 8 figures
Optical Responses of Chiral Majorana Edge States in Two-Dimensional Topological Superconductors
Creators: name: He, James Jun
name: Tanaka, Yukio
name: Nagaosa, Naoto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Majorana fermions exist on the boundaries of two-dimensional topological superconductors (TSCs) as charge-neutral quasi-particles. The neutrality makes the detection of such states challenging from both experimental and theoretical points of view. Current methods largely rely on transport measurements in which Majorana fermions manifest themselves by inducing electron-pair tunneling at the lead-contacting point. Here we show that chiral Majorana fermions in TSCs generate {enhanced} local optical response. The features of local optical conductivity distinguish them not only from trivial superconductors or insulators but also from normal fermion edge states such as those in quantum Hall systems. Our results provide a new applicable method to detect dispersive Majorana fermions and may lead to a novel direction of this research field.
description: 5 pages, 4 figures
Thermal inertia of main belt asteroids smaller than 100 km from IRAS data
Creators: name: Delbo, Marco
name: Tanga, Paolo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent works have shown that the thermal inertia of km-sized near-Earth asteroids (NEAs) is more than two orders of magnitude higher than that of main belt asteroids (MBAs) with sizes (diameters) between 200 and 1,000 km. This confirms the idea that large MBAs, over hundreds millions of years,have developed a fine and thick thermally insulating regolith layer, responsible for the low values of their thermal inertia, whereas km-sized asteroids, having collisional lifetimes of only some millions years, have less regolith, and consequently a larger surface thermal inertia. Because it is believed that regolith on asteroids forms as a result of impact processes, a better knowledge of asteroid thermal inertia values and its correlation with size, taxonomic type, and density can be used as an important constraintfor modeling of impact processes on asteroids. However, our knowledge of asteroids' thermal inertia values is still based on few data points with NEAs covering the size range 0.1-20 km and MBAs that >100 km. Here, we use IRAS infrared measurements to estimate the thermal inertias of MBAs with diameters 100 km and known shapes and spin vector: filling an important size gap between the largest MBAs and the km-sized NEAs. An update to the inverse correlation between thermal inertia and diameter is presented. For some asteroids thermophysical modelling allowed us to discriminate between the two still possible spin vector solutions derived from optical lightcurve inversion. This is important for (720) Bohlinia: our preferred solution was predicted to be the correct one by Vokrouhlicky et al. (2003, Nature 425, 147) just on theoretical grounds.
description: Planetary and Space Science (2008)
Superluminality in the Fierz--Pauli massive gravity
Creators: name: Osipov, M.
name: Rubakov, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the propagation of helicity-1 gravitons in the Fierz--Pauli massive gravity in nearly Minkowski backgrounds. We show that, generically, there exist backgrounds consistent with field equations, in which the propagation is superluminal. The relevant distances are much longer than the ultraviolet cutoff length inherent in the Fierz--Pauli gravity, so superluminality occurs within the domain of validity of the effective low energy theory. There remains a possibility that one may get rid of this property by imposing fine tuning relations between the coefficients in the non-linear generalization of the Fierz--Pauli mass term, order by order in non-linearity; however, these relations are not protected by any obvious symmetry. Thus, among others, superluminality is a problematic property to worry about when attempting to construct infrared modifications of General Relativity.
description: 11 pages, no figures
การจัดการสภาพแวดล้อมทางกายภาพหอวัฒนธรรมพื้นบ้านไทยวน สระบุรี
Creators: name: รองศาสตราจารย์ จันทนี เพชรานนท์
Publisher: name: โรงพิมพ์แห่งจุฬาลงกรณ์มหาวิทยาลัย
Year: 2012
Subjects: ไทยวนภาคกลาง,การจัดการสภาพแวดล้อมทางกายภาพ,หอวัฒนธรรมพื้นบ้าน,พิพิธภัณฑ์มีชีวิต

description: 61, Academic Journal of Architecture
Gapped Dirac semimetal with mixed linear and parabolic dispersions
Creators: name: Wang, Yi-Xiang
name: Li, Fuxiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this paper, we make a comprehensive study of the properties of a gapped Dirac semimetal model, which was originally proposed in the magnetoinfrared spectroscopy measurement of ZeTe$_5$, and includes both the linear and parabolic dispersions in all three directions. We find that, depending on the band inversion parameters, $ζ'$ and $ζ_z'$, the model can support three different phases: the single Dirac point (DP) phase, the double DPs phase and the Dirac ring phase. The three different phases can be distinguished by their low-energy features in the density of states (DOS) and optical conductivity. At high energy, both the DOS and optical conductivity exhibit power-law like behaviors, with the asymptotic exponents depending heavily on the signs of $ζ'$ and $ζ_z'$. Moreover, the thumb-of-rule formula between the DOS and optical conductivity is satisfied only when $(ζ',ζ_z')>0$. The implications of our results for experiments are discussed.
description: 8 pages, 5 figures
Unparticle effects in rare (t -> c g g) decay
Creators: name: Aliev, T. M.
name: Bekmezci, A.
name: Savci, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Rare (t -> c g g) decay can only appear at loop level in the Standard Model (SM), and naturally they are strongly suppressed. These flavor changing decays induced by the mediation of spin-0 and spin-2 unparticles, can appear at tree level in unparticle physics. In this work the virtual effects of unparticle physics in the flavor-changing (t -> c g g) decay is studied. Using the SM result for the branching ratio of the (t -> c g g) decay, the parameter space of d_U and Lambda_U, where the branching ratio of this decay exceeds the one predicted by the SM, is obtained. Measurement of the branching ratio larger than 10^(-9) can give valuable information for establishing unparticle physics.
description: 15 pages, 7 figures, LaTeX formatted
The Vacuum Structure, Special Relativity Theory and Quantum Mechanics Revisited: A Field Theory-No-Geometry Approach
Creators: name: Bogolubov, Nikolai N.
name: Prykarpatsky, Anatoliy K.
name: Taneri, Ufuk
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The main fundamental principles characterizing the vacuum field structure are formulated, the modeling of the related vacuum medium and charged point particle dynamics by means of devised field theoretic tools are analyzed. The Maxwell electrodynamic theory is revisited and newly derived from the suggested vacuum field structure principles, the classical special relativity theory relationship between the energy and the corresponding point particle mass is revisited and newly obtained. The Lorentz force expression with respect to arbitrary non-inertial reference frames is revisited and discussed in detail, some new interpretations of relations between the special relativity theory and quantum mechanics are presented. The famous quantum-mechanical Schrödinger type equations for a relativistic point particle in the external potential and magnetic fields within the quasiclassical approximation as the Planck constant $\hbar \to 0$ and the light velocity $c\to \infty$ are obtained.
description: 17 pages, Available at: \texttt{http://publications.ictp.it}}\hfill IC/2008/
Enhanced low-temperature entropy and flat-band ferromagnetism in the t-J model on the sawtooth lattice
Creators: name: Honecker, A.
name: Richter, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using the example of the sawtooth chain, we argue that the t-J model shares important features with the Hubbard model on highly frustrated lattices. The lowest single-fermion band is completely flat (for a specific choice of the hopping parameters $t_{i,j}$ in the case of the sawtooth chain), giving rise to single-particle excitations which can be localized in real space. These localized excitations do not interact for sufficient spatial separations such that exact many-electron states can also be constructed. Furthermore, all these excitations acquire zero energy for a suitable choice of the chemical potential $μ$. This leads to: (i) a jump in the particle density at zero temperature, (ii) a finite zero-temperature entropy, (iii) a ferromagnetic ground state with a charge gap when the flat band is fully occupied and (iv) unusually large temperature variations when $μ$ is varied adiabatically at finite temperature.
description: 2 pages including 2 figures, uses elsart style files; (proceedings of ICM 2006)
Additional file 1: of Spirometric assessment of emphysema presence and severity as measured by quantitative CT and CT-based radiomics in COPD
Creators: name: Mariaelena Occhipinti
name: Paoletti, Matteo
name: Bartholmai, Brian
name: Srinivasan Rajagopalan
name: Karwoski, Ronald
name: Nardi, Cosimo
name: Inchingolo, Riccardo
name: Larici, Anna
name: Camiciottoli, Gianna
name: Lavorini, Federico
name: Colagrande, Stefano
name: Brusasco, Vito
name: Pistolesi, Massimo
Publisher: name: Figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Developmental Biology

description: Theoretical background and description of ESI method (PDF 499 kb)
Ethics-Based Auditing of Automated Decision-Making Systems: Nature, Scope, and Limitations
Creators: name: Mokander, Jakob
name: Morley, Jessica
name: Taddeo, Mariarosaria
name: Floridi, Luciano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Important decisions that impact human lives, livelihoods, and the natural environment are increasingly being automated. Delegating tasks to so-called automated decision-making systems (ADMS) can improve efficiency and enable new solutions. However, these benefits are coupled with ethical challenges. For example, ADMS may produce discriminatory outcomes, violate individual privacy, and undermine human self-determination. New governance mechanisms are thus needed that help organisations design and deploy ADMS in ways that are ethical, while enabling society to reap the full economic and social benefits of automation. In this article, we consider the feasibility and efficacy of ethics-based auditing (EBA) as a governance mechanism that allows organisations to validate claims made about their ADMS. Building on previous work, we define EBA as a structured process whereby an entity's present or past behaviour is assessed for consistency with relevant principles or norms. We then offer three contributions to the existing literature. First, we provide a theoretical explanation of how EBA can contribute to good governance by promoting procedural regularity and transparency. Second, we propose seven criteria for how to design and implement EBA procedures successfully. Third, we identify and discuss the conceptual, technical, social, economic, organisational, and institutional constraints associated with EBA. We conclude that EBA should be considered an integral component of multifaced approaches to managing the ethical risks posed by ADMS.
description: Artificial Intelligence, Auditing, Automated Decision-Making, Ethics, Governance
Stokes-space formalism for Bragg scattering in a fiber
Creators: name: McKinstrie, C. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical frequency conversion by four-wave mixing (Bragg scattering) in a fiber is considered. The evolution of this process can be modeled using the signal and idler amplitudes, which are complex, or Stokes-like parameters, which are real. The Stokes-space formalism allows one to visualize power and phase information simultaneously, and produces a simple evolution equation for the Stokes parameters.
The real analytic Feigenbaum-Coullet-Tresser attractor in the disk
Creators: name: Catsigeras, E.
name: Cerminara, M.
name: Enrich, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37G35, 58D15, 34C23, 34D45

description: We consider a real analytic diffeomorphism $ψ_0$ on a n-dimensional disk D, n >= 2, exhibiting a Feigenbaum-Coullet-Tresser (F.C.T.) attractor, being far, in the standard topology of the real analytic diffeomorphism space C(D), from the standard F.C.T. map $ϕ_0$ fixed by the double renormalization. We prove that $ψ_0$ persists along a codimension-one manifold M \subset C(D), and that it is the bifurcating map along any one-parameter family in $C(D)$ transversal to M, from diffeomorphisms attracted to sinks, to those which exhibit chaos. The main tool in the proofs is a theorem of Functional Analysis, which we state and prove in this paper, characterizing the existence of codimension one submanifolds in any abstract functional Banach space.
Jet correlations from unintegrated parton distributions
Creators: name: Hautmann, F.
name: Jung, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Transverse-momentum dependent parton distributions can be introduced gauge-invariantly in QCD from high-energy factorization. We discuss Monte Carlo applications of these distributions to parton showers and jet physics, with a view to the implications for the Monte Carlo description of complex hadronic final states with multiple hard scales at the LHC.
description: 8 pages, 4 figures
Vacuum Decay Time in Strong External Fields
Creators: name: Labun, Lance
name: Rafelski, Johann
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider dynamics of vacuum decay and particle production in the context of short pulse laser experiments. We identify and evaluate the invariant "materialization time," $τ$, the timescale for the conversion of an electromagnetic field energy into particles, and we compare to the laser related time scales.
description: 4 pages, 2 figures; improved representation of eq. 12, improved figures, added references, improved introductory material, and corrected typos
A study of the stress corrosion cracking of mild steel in alkaline and alkaline sulphide solutions
Creators: name: Singbeil, Douglas Lloyd
Publisher: name: University of British Columbia
Year: 2010

description: The stress corrosion cracking (SCC) of an At ST C-1018 mild steel was investigated in three solutions, composed of 12.5 mol/kg NaOH, 3.35 mol/kg NaOH and 2.5 mol/kg NaOH + 0.42 mol/kg Na₂S, respectively. The potential of maximum susceptibility to SCC of steel in the latter two solutions was assessed by a slow strain rate technique. It was found to be slightly higher than the active-passive transition in each solution (-1.00 Vsce in 3.35 mol/kg NaOH and -0.88 Vsce in 2.5 mol/kg NaOH + 0.42 mol/kg Na₂S). A fracture mechanics technique, utilizing fatigue precracked double cantilever beam specimens, was then used to study the effects of stress intensity, temperature and electrochemical potential on crack velocity in all three solutions. Both stress intensity dependent (region I) and stress intensity independent (region II) crack velocity behavior was found. Apparent activation energies for region II of ~ 24 kJ/mol were determined at both Ecorr and -1.00 Vsce in 12.5 mol/kg NaOH. Crack velocities of the order of 10⁻⁹ m/s were measured at Ecorr in 12.5 mol/kg NaOH and at -1.00 Vsce and -0.88 Vsce 3.35 mol/kg NaOH and 2.5 mol/kg NaOH + 0.42 mol/kg Na₂S, respectively. The crack velocities measured at -1.00 Vsce in 12.5 mol/kg NaOH were of the order of 10⁻⁸ m/s. The fractography of the cracks was transgranular in 12.5 mol/kg NaOH at Ecorr. A mixed intergranular-transgranular fractography was observed at the active-passive transition in all three solutions. The results of the two techniques were compared and discussed, as was the role of stress intensity and passivation rate in fracture mechanics experiments. Anodic dissolution, hydrogen embrittlement and adsorption mechanisms were considered. It was decided that the results at Ecorr in 12.5 mol/kg NaOH could best be accounted for by a hydrogen embrittlement mechanism, perhaps assisted by anodic dissolution. Hydrogen embrittlement was eliminated as a possible mechanism at the active-passive transition in all the solutions. The most likely mechanism was thought to be one involving mixed activation-diffusion controlled dissolution. Applications of the results to the pulp and paper industry were considered.
Optimizing Multi-Taper Features for Deep Speaker Verification
Creators: name: Liu, Xuechen
name: Sahidullah, Md
name: Kinnunen, Tomi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Multi-taper estimators provide low-variance power spectrum estimates that can be used in place of the windowed discrete Fourier transform (DFT) to extract speech features such as mel-frequency cepstral coefficients (MFCCs). Even if past work has reported promising automatic speaker verification (ASV) results with Gaussian mixture model-based classifiers, the performance of multi-taper MFCCs with deep ASV systems remains an open question. Instead of a static-taper design, we propose to optimize the multi-taper estimator jointly with a deep neural network trained for ASV tasks. With a maximum improvement on the SITW corpus of 25.8% in terms of equal error rate over the static-taper, our method helps preserve a balanced level of leakage and variance, providing more robustness.
description: To appear in IEEE Signal Processing Letters
Squeezed states produced by modulation interaction and phase conjugation in fibers
Creators: name: McKinstrie, C. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Number-state expansions are derived for the squeezed states produced by four-wave mixing (modulation interaction and phase conjugation) in fibers. These expansions are valid for arbitrary pump-induced coupling and dispersion-induced mismatch coefficients. To illustrate their use, formulas are derived for the associated field-quadrature and photon-number variances and correlations.
Spin Hall effect in a two-dimensional electron gas in the presence of a magnetic field
Creators: name: Lucignano, P.
name: Raimondi, R.
name: Tagliacozzo, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the spin Hall effect of a two-dimensional electron gas in the presence of a magnetic field and both the Rashba and Dresselhaus spin-orbit interactions. We show that the value of the spin Hall conductivity, which is finite only if the Zeeman spin splitting is taken into account, may be tuned by varying the ratio of the in-plane and out-of-plane components of the applied magnetic field. We identify the origin of this behavior with the different role played by the interplay of spin-orbit and Zeeman couplings for in-plane and out-of-plane magnetic field components.
description: 5 pages, 5 figures, submitted
Toward Certifiable Motion Planning for Medical Steerable Needles
Creators: name: Fu, Mengyu
name: Salzman, Oren
name: Alterovitz, Ron
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Medical steerable needles can move along 3D curvilinear trajectories to avoid anatomical obstacles and reach clinically significant targets inside the human body. Automating steerable needle procedures can enable physicians and patients to harness the full potential of steerable needles by maximally leveraging their steerability to safely and accurately reach targets for medical procedures such as biopsies and localized therapy delivery for cancer. For the automation of medical procedures to be clinically accepted, it is critical from a patient care, safety, and regulatory perspective to certify the correctness and effectiveness of the motion planning algorithms involved in procedure automation. In this paper, we take an important step toward creating a certifiable motion planner for steerable needles. We introduce the first motion planner for steerable needles that offers a guarantee, under clinically appropriate assumptions, that it will, in finite time, compute an exact, obstacle-avoiding motion plan to a specified target, or notify the user that no such plan exists. We present an efficient, resolution-complete motion planner for steerable needles based on a novel adaptation of multi-resolution planning. Compared to state-of-the-art steerable needle motion planners (none of which provide any completeness guarantees), we demonstrate that our new resolution-complete motion planner computes plans faster and with a higher success rate.
description: To be published in Robotics: Science and Systems (RSS) 2021
bibliotecas-socios-tucuman-1938-diccionario
Creators: name: Dobrecky, Leticia
Publisher: name: Dobrecky, Leticia P.
Year: 2025
Subjects: subject: Bibliotecas
subject: Libraries
subject: Argentina
subject: Estadísticas
subject: Statistics
subject: FOS: Mathematics
subject: Statistical data

description: Diccionario de datos que documenta el dataset "bibliotecas-socios-tucuman-1938".
Fragmentation Statistics of Food Diced and Crushed Using a Food Mixer
Creators: name: Kobayashi, Naoki
name: Shibayama, Hitoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The fragment-size distributions of raw carrot diced or crushed using a food mixer are studied experimentally. For the 5-mm-square raw carrot, the normal distribution shows a characteristic feature of food fragmentation statistics. This simple result indicates that most random errors contribute to fragment-size fluctuation. On the other hand, for the crushed raw carrot, the cumulative fragment size distribution follows the power law where the exponent $α\simeq 1.62 > 1$. Furthermore, considering the cumulative fragment-size distribution as a function of length for comparison with geomaterials, such as fault rocks, the exponent $D \simeq 3.64$. Previous studies have shown that the power-law distribution observed in sequential fragmentation tends to have a large exponent value. As our experiment is also based on sequential fragmentation, the obtained large values of exponents $α$ and $D$ are consistent with those obtained in previous studies on sequential fragmentation. On the basis of previous studies and our observations, we discuss the effect of the preferential fragmentation of particles as large as the mixer blades. We also discuss the existence of a lower limit beyond which further fragmentation is difficult, resulting in a power-law distribution tendency for raw carrot crushed with a food mixer.
description: 5 pages, 5 figures
A multiple age class population model with delayed recruitment
Creators: name: Chuma, Joseph Louis
Publisher: name: University of British Columbia
Year: 2010

description: An exploited single-species population model with a density dependent reproductive function is constructed, in which recruitment to the adult breeding population may occur in one of several possible age classes. The parent is assumed capable of giving birth only once. It is also assumed that all density dependence is concentrated in the first year of life. A linearized stability analysis of the multiply-delayed difference equation model is carried out and a sufficient condition for stability is derived for the general case, while necessary and sufficient conditions are found in specific examples. Some indication of the complicated bifurcation structure of the model is given by a series of computer simulation plots. Finally, the method of Lagrange multipliers is used to find the optimal equilibrium escapement level for the original exploited population model.
How Do You Solve a Problem Like Development? From Wallerstein’s World-Systems to  Post-Development Progress
Creators: Monique S. Wilson
Publisher: name: University of Alberta Library
Year: 2023

Teacher union work is a vital piece in improving student learning conditions in the developing world. However, this work continues to be done in the framework of world-systems analysis, which positions the developed north in the core position and the developing south in the periphery position. This paper will suggest that development work will be more effective when framed in the post-development theory model, which allows for contextualisation of the developing countries and acknowledges their unique history. It gives the developing country the agency to decide what they want and need, and positions the northern development worker as a resource rather than a leader.
Additional file 1: of Effectiveness of the Pilates method versus aerobic exercises in the treatment of older adults with chronic low back pain: a randomized controlled trial protocol
Creators: name: Naiane Oliveira
name: Ricci, Natalia
name: Franco, Yuri Santos
name: Evany Salvador
name: Almeida, Isabella
name: Cabral, Cristina
Publisher: name: Figshare
Year: 2019
Subjects: subject: Medicine
subject: Cell Biology
subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Plant Biology

description: Mat-based exercises. The appendix 1 contains photos and description of Pilates exercises that could be performed on mat. (PDF 3667 kb)
Evolution of virial clouds-I: from surface of last scattering up to the formation of population-III stars
Creators: name: Tahir, Noraiz
name: Qadir, Asghar
name: Sakhi, Muhammad
name: De Paolis, Francesco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The analysis of WMAP and Planck CMB data has shown the presence of temperature asymmetries towards the halos of several galaxies, which is probably due to the rotation of clouds present in these halos about the rotational axis of the galaxies. It had been proposed that these are hydrogen clouds that {\it should} be in equilibrium with the CMB. However, standard theory did not allow equilibrium of such clouds at the very low CMB temperature, but it was recently shown that the equilibrium {\it could} be stable. This still does not prove that the cloud concentration and that the observed temperature asymmetry is due to clouds in equilibrium with the CMB. To investigate the matter further, it would be necessary to trace the evolution of such clouds, which we call "virial clouds", from their formation epoch to the present, so as to confront the model with the observational data. The task is to be done in two steps: (1) from the cloud formation before the formation of first generation of stars; (2) from that time to the present. In this paper we deal with the first step leaving the second one to a subsequent analysis.
Additional file 2: of Effectiveness of the Pilates method versus aerobic exercises in the treatment of older adults with chronic low back pain: a randomized controlled trial protocol
Creators: name: Naiane Oliveira
name: Ricci, Natalia
name: Franco, Yuri Santos
name: Evany Salvador
name: Almeida, Isabella
name: Cabral, Cristina
Publisher: name: Figshare
Year: 2019
Subjects: subject: Medicine
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Science Policy
subject: Plant Biology

description: Equipment-based exercises. The appendix 2 contains photos and description of Pilates exercises that could be performed on equipment. (PDF 2285 kb)
title:  ASSESSMENT OF AIR OVERPRESSURE FROM BLASTING USING COMPUTATIONAL FLUID DYNAMICS
Creators: name: Aramayo Chavez, Cecilia Estefania
Publisher: name: University of Kentucky Libraries
Year: 2023
Subjects: classificationCode: 2.7
subject: FOS: Environmental engineering

description: Air overpressure is a shock wave that occurs when explosives detonate and travel through the air. This can cause damage and annoyance in mining blasts, making it a significant concern for the surroundings of the operation. Currently, the cube root scale distance is used to predict air overpressure, but this method has limitations. To accurately determine air overpressure behavior, a new method is needed. Computational fluid dynamics (CFD) is a reliable and advanced technique that can simulate and solve complex physical problems, including the behavior of air overpressure. In this thesis, two techniques, the bursting balloon, and total pressure boundary, have been used to create numerical models for air overpressure. In the bursting balloon technique, a compressed closed volume is released, creating a pressure wave that is analyzed while it travels from the source. In the total pressure boundary technique, a time vs pressure curve is used as input against a surface and then released. Both techniques have been used to model a signature hole, while the total pressure boundary technique has also been used to model a blasting pattern composed of 21 blasting holes. These models only consider the physical interaction among the elements of fluid motion without including any chemical reactions from the explosives. To reduce computational time, a simplified simulation is key, as the simulation can run from minutes to days, weeks, or months.
description: 2023 Cecilia Estefania Aramayo
Hydrogen tunneling in the perovskite ionic conductor BaCe(1-x)Y(x)O(3-d)
Creators: name: Cordero, F.
name: Craciun, F.
name: Deganello, F.
name: La Parola, V.
name: Roncari, E.
name: Sanson, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present low-temperature anelastic and dielectric spectroscopy measurements on the perovskite ionic conductor BaCe(1-x)Y(x)O(3-x/2) in the protonated, deuterated and outgassed states. Three main relaxation processes are ascribed to proton migration, reorientation about an Y dopant and tunneling around a same O atom. An additional relaxation maximum appears only in the dielectric spectrum around 60 K, and does not involve H motion, but may be of electronic origin, e.g. small polaron hopping. The peak at the lowest temperature, assigned to H tunneling, has been fitted with a relaxation rate presenting crossovers from one-phonon transitions, nearly independent of temperature, to two-phonon processes, varying as T^7, to Arrhenius-like. Substituting H with D lowers the overall rate by 8 times. The corresponding peak in the dielectric loss has an intensity nearly 40 times smaller than expected from the classical reorientation of the electric dipole associated with the OH complex. This fact is discussed in terms of coherent tunneling states of H in a cubic and orthorhombically distorted lattice, possibly indicating that only H in the symmetric regions of twin boundaries exhibit tunneling, and in terms of reduction of the effective dipole due to lattice polarization.
description: submitted to Phys. Rev. B
Local Raman Spectroscopy of Chiral Majorana Edge Modes in Kitaev Spin Liquids and Topological Superconductors
Creators: name: He, James Jun
name: Nagaosa, Naoto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Raman scattering with local optical excitation from the Majorana edge modes of Kitaev spin liquids and topological superconductors is studied theoretically. Although the effective one-dimensional model is common between these two cases, the coupling to the electromagnetic field is different. It is found that the Raman spectrum at low energy scales with $ω^3$ in Kitaev spin liquids while it shows the gap in topological superconductors. This is in sharp contrast to the infrared absorption, where the spectrum shows the gap in Kitaev spin liquids, while it behaves as $\sim ω^2$ in topological superconductors. This indicates that the electrodynamics of Majorana edge modes depends on their higher-dimensional origins. The realistic estimate of the Raman scattering intensity is given for $α$-RuCl$_3$ as the candidate for Kitaev spin liquid.
Algebraic homotopy theory, groups, and K-theory
Creators: name: Jardine, J. F.
Publisher: name: University of British Columbia
Year: 2010

description: Let Mk be the category of algebras over a unique factorization domain k, and let ind-Affk denote the category of pro-representable functors from Mk to the category E of sets. It is shown that ind-Affk is a closed model category in such a way that its associated homotopy category Ho(ind-Affk) is equivalent to the homotopy category Ho(S) which comes from the category S of simplicial sets. The equivalence is induced by functors Sk: ind-Affk -> S and Rk: S-> ind-Affk. In an effort to determine what is measured by the homotopy groups πi(X) := πi. (Sk X) of X in ind-Affk in the case where k is an algebraically closed field, some homotopy groups of affine reduced algebraic groups G over k are computed. It is shown that, if G is connected, then π₀ (G) = * if and only if the group G(k) of k-rational points of G is generated by unipotents. A fibration theory is developed for homomorphisms of algebraic groups which are surjective on rational points which allows the computation of the homotopy groups of any connected algebraic group G in terms of the homotopy groups of the universal covering groups of the simple algebraic subgroups of the associated semi-simple group G/R(G), where R(G) is the solvable radical of G. The homotopy groups of simple Chevalley groups over almost all fields k are studied. It is shown that the homotopy groups of the special linear groups S1n and of the symplectic groups Sp2m converge, respectively, to the K-theory and ₋₁L-theory of the underlying field k. It is shown that there are isomorphisms π₁ (S1n ) = H₂(S1n (k);Z) = K₂(k) for n ≥ 3 and almost all fields k, and π₁ (Sp₂m ) = H₂(Sp₂m) (k);Z) = ₋₁L₂(k) for m ≥ 1 and almost all fields k of characteristic ≠ 2, where Z denotes the ring of integers. It is also shown that π₁(Sp₂m) = H₂(Sp2m(k);Z) = K₂ (k) if k is algebraically closed of arbitrary characteristic. A spectral sequence for the homology of the classifying space of a simplicial group is used for all of these calculations.
The Cosmic Broth A Revolutionary Approach to Gravitational Fields and Dark Matter
Creators: name: Cacci, Marco
Publisher: name: Zenodo
Year: 2025

description: On a new model called Cosmic Broth Theory that excludes String Theory while referring to the Standard Model and Hardy's Theory and Quantum Mechanics, in practice arguing that the laws of physics emerge from a substrate of dark matter and energy, related on a paper of a model called Alcubierre-Cacci which, while not violating the theory of relativity, exploits a series of knowledge advanced theories. The Alcubierre modified - like Alcubierre-Cacci, not only can serve for superluminal travels, but to test in first person. I hope a day these ideas could find a home in your heart and mind.
Local moments and magnetic order in the two-dimensional Anderson-Mott transition
Creators: name: Pezzoli, Maria Elisabetta
name: Becca, Federico
name: Fabrizio, Michele
name: Santoro, Giuseppe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the role of electronic correlation in a disordered two-dimensional model by using a variational wave function that can interpolate between Anderson and Mott insulators. Within this approach, the Anderson-Mott transition can be described both in the paramagnetic and in the magnetic sectors. In the latter case, we find evidence for the formation of local magnetic moments that order before the Mott transition. The charge gap opening in the Mott insulator is accompanied by the vanishing of the $\lim_{q\to 0} \overline{< n_q>< n_{-q}>}$ (the bar denoting the impurity average), which is related to the compressibility fluctuations. The role of a frustrating (second-neighbor) hopping is also discussed, with a particular emphasis to the formation of metastable spin-glass states.
description: 4+epsilon pages, 5 figures
Fermions and Emergent Noncommutative Gravity
Creators: name: Klammer, Daniela
name: Steinacker, Harold
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Fermions coupled to Yang-Mills matrix models are studied from the point of view of emergent gravity. We show that the simple matrix model action provides an appropriate coupling for fermions to gravity, albeit with a non-standard spin connection. Integrating out the fermions in a nontrivial geometrical background induces indeed the Einstein-Hilbert action and a dilaton-like term, at least for on-shell geometries. This explains and precisely reproduces the UV/IR mixing for fermions in noncommutative gauge theory, extending recent results for scalar fields. It also explains why some UV/IR mixing remains even in supersymmetric models, except in the N=4 case.
description: 29 pages, 2 figures. V2: typos corrected, references added