cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cup anemometer wind observations over the sea
Creators: name: Hamblin, Paul Frederick
Publisher: name: University of British Columbia
Year: 2011

description: During the past two summers at the Institute of Oceanography of the University of British Columbia a research group has been involved in an experimental programme studying the interaction between the air and the sea close to the ocean surface. To date instruments have been developed and used to measure the vertical flux of momentum and the waves on the water surface. The observational site is situated on the tidal flat, Spanish Banks, in Burrard Inlet. Though the fetch is limited measurements are considered to be representative of the air flow close to the sea surface. The most important influence driving the ocean circulation is thought to be the momentum transferred through the atmospheric boundary layer. Although quantities such as heat and water vapour are also transferred, this thesis concerns only the transport of momentum. From profiles of wind speed measured over the sea at six heights up to five meters the downward transport of momentum is deduced. Whenever possible this momentum transport is compared to other estimations of this quantity, obtained by means of the hot wire anemometer. The various conditions of atmospheric stability are recorded and used in association with wind profile studies. Another important aspect of the wind profile study of this thesis is to determine the optimum averaging time for wind speeds in order that they may give meaningful estimates of the vertical transport of momentum. Furthermore, wind profiles are compared critically for fluctuating winds of approximately ten minute duration with the hope of discovering the influence of waves on the air flow close to the surface. The surface drag coefficients are inferred from the wind profiles and results are compared to those of other workers. The influence of the other measured variables on drag coefficients, such as wind speed, stability, and fetch, is studied. Several spectra of the low frequency downwind velocity fluctuations are computed and these results are compared with the spectra obtained by other workers and in addition with a hot wire anemometer spectrum. For one run enough 10 second-averaged velocities are available to calculate, with a reasonable degree of certainty, the statistics of the distribution of the downwind velocity components. The results from the past two summers presented in this thesis should be regarded as a preliminary investigation of some of the physical processes of air-sea interaction. By no means all the determining factors as yet have been successfully measured. At this stage a more thorough understanding of the behaviour of the instruments for measuring the transfer of momentum and a preliminary understanding of the physical processes involved has been gained.
Quantum Hall Phase Diagram of Second Landau-level Half-filled Bilayers: Abelian versus Non-Abelian States
Creators: name: Peterson, Michael R.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The quantum Hall phase diagram of the half-filled bilayer system in the second Landau level is studied as a function of tunneling and layer separation using exact diagonalization. We make the striking prediction that bilayer structures would manifest two distinct branches of incompressible fractional quantum Hall effect (FQHE) corresponding to the Abelian 331 state (at moderate to low tunneling and large layer separation) and the non-Abelian Pfaffian state (at large tunneling and small layer separation). The observation of these two FQHE branches and the quantum phase transition between them will be compelling evidence supporting the existence of the non-Abelian Pfaffian state in the second Landau level.
description: 4 pages, 3 figures
A new framework for computing a general local self-diffusion coefficient using statistical mechanics
Creators: name: Hunter, Michelle A.
name: Demir, Baris
name: Petersen, Charlotte F.
name: Searles, Debra J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Widely applicable, modified Green-Kubo expressions for the local diffusion coefficient ($D_l$) are obtained using linear response theory. In contrast to past definitions in use, these expressions are statistical mechanical results. Molecular simulations of systems with anisotropic diffusion and an inhomogeneous density profile confirm the validity of the results. Diffusion coefficients determined from different expressions in terms of currents and velocity correlations agree in the limit of large systems. Furthermore, they apply to arbitrarily small local regions, making them readily applicable to nanoscale and inhomogeneous systems where knowledge of $D_l$ is important.
Os carteis da crise em tempos de pandemia
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Por Cristiana Fortini e Raphael Boechat A defesa da concorrência está prevista constitucionalmente como o princípio da ordem econômica, o que impõe uma conduta proativa do Estado que assegure a religião e a fiscalização das condutas de mercado. Diante disto, o combate as práticas de cartelização deve ser regra, haja vista que as infrações à ordem econômica podem impor resultados extremamente prejudiciais, como o sobrepreço, ou a estabilização no tempo e no espaço da qualidade dos produtos e serviços, resultado último da competição.
Characterization of large area photomutipliers under low magnetic fields: design and performances of the magnetic shielding for the Double Chooz neutrino experiment
Creators: name: Calvo, E.
name: Cerrada, M.
name: Fernández-Bedoya, C.
name: Gil-Botella, I.
name: Palomares, C.
name: Rodríguez, I.
name: Toral, F.
name: Verdugo, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This paper describes the characterization studies under low magnetic fields of the Hamamatsu R7081 photomultipliers that are being used in the Double Chooz experiment. The design and performances of the magnetic shielding that has been developed for these photomultipliers are also reported.
description: 16 pages, 13 figures
Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography
Creators: name: Imamura, Takumi
name: Hirai, Takamasa
name: Oyanagi, Koichi
name: Iguchi, Ryo
name: Takamori, Kenta
name: Kobayashi, Satoru
name: Uchida, Ken-ichi
Publisher: name: arXiv
Year: 2025
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose and demonstrate a quantitative noncontact measurement method for the thermal Hall effect (THE) based on magnetic-field-modulated lock-in thermography. This method enables visualization of THE-induced temperature change and quantitative estimation of the thermal Hall angle $θ_{\rm THE}$ by applying periodic magnetic fields to a sample and obtaining the first harmonic response of thermal images. By combining this method with LIT-based measurement techniques for the longitudinal thermal conductivity $κ_{xx}$, we also quantify the transverse thermal conductivity $κ_{xy}$. We validate our measurement methods by estimating $θ_{\rm THE}$, $κ_{xx}$, and $κ_{xy}$ in a ferromagnetic Heusler alloy Co$_2$MnGa slab showing large THE.
description: 18 pages, 6 figures
Hay from the haystack: explicit examples of exponential quantum circuit complexity
Creators: name: Jia, Yifan
name: Wolf, Michael M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The vast majority of quantum states and unitaries have circuit complexity exponential in the number of qubits. In a similar vein, most of them also have exponential minimum description length, which makes it difficult to pinpoint examples of exponential complexity. In this work, we construct examples of constant description length but exponential circuit complexity. We provide infinite families such that each element requires an exponential number of two-qubit gates to be generated exactly from a product and where the same is true for the approximate generation of the vast majority of elements in the family. The results are based on sets of large transcendence degree and discussed for tensor networks, diagonal unitaries, and maximally coherent states.
description: 22 pages, minor modifications, example of maximal complexity added
Second order QCD corrections to inclusive semileptonic b \to Xc l \bar ν_l decays with massless and massive lepton
Creators: name: Biswas, Sandip
name: Melnikov, Kirill
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend previous computations of the second order QCD corrections to semileptonic b \to c inclusive transitions, to the case where the charged lepton in the final state is massive. This allows accurate description of b \to c τ\bar ν_τdecays. We review techniques used in the computation of O(α_s^2) corrections to inclusive semileptonic b \to c transitions and present extensive numerical studies of O(α_s^2) QCD corrections to b \to c l \bar ν_l decays, for l =e, τ.
description: 30 pages, 4 figures, 5 tables
Lei 13.640/18 fim da controvérsia sobre os aplicativos de transporte
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Em 26 de março de 2018, foi sancionada, sem veto presidencial a qualquer dos dispositivos, a Lei 13.640/18, que altera a Lei 12.587/12 (Lei de Mobilidade Urbana) para conceituar e disciplinar o transporte remunerado privado individual de passageiros. A recente lei em comento alterou o inciso X do artigo 4o da Lei 12.587/12, para conceituar o transporte remunerado privado individual de passageiros como aquele não aberto ao público, destinado à realização de viagens individualizadas ou compartilhadas solicitadas exclusivamente por usuários previamente cadastrados em aplicativos ou plataformas de comunicação em rede.
Massive core/star formation triggered by cloud-cloud collision: II High-speed collisions of magnetized clouds
Creators: name: Sakre, Nirmit
name: Habe, Asao
name: Pettitt, Alex R.
name: Okamoto, Takashi
name: Enokiya, Rei
name: Fukui, Yasuo
name: Hosokawa, Takashi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the effects of the magnetic fields on the formation of massive, self-gravitationally bound cores (MBCs) in high-speed cloud-cloud collisions (CCCs). Extending our previous work (Sakre et al. 2021), we perform magnetohydrodynamic simulations following the high-speed (20 - 40 km s$^{-1}$) collisions between two magnetized (4 $μ$G initially), turbulent clouds of different sizes in the range of 7 - 20 pc. We show that a magnetic field effect hinders the core growth, particularly after a short-duration collision during which cores cannot get highly bound. In such a case, a shocked region created by the collision rapidly expands to the ambient medium owing to the enhanced magnetic pressure, resulting in the destruction of the highly unbound cores and suppression of gas accretion to massive cores. This negative effect on the MBC formation is a phenomenon not seen in the past hydrodynamic simulations of similar CCC models. Together with our previous work, we conclude that the magnetic fields provide the two competing effects on the MBC formation in CCC; while they promote the mass accumulation into cores during a collision, they operate to destroy cores or hinder the core growth after the collision. The duration of collision determines which effect prevails, providing the maximum collision speed for the MBC formation with given colliding clouds. Our results agree with the observed trend among CCC samples in the corresponding column density range; clouds with higher relative velocity require higher column density for the formation of massive stars (Enokiya et al. 2021).
description: Submitted to MNRAS journal
ON SOME PECULIARITIES OF CBDC IN UKRAINE AND LITHUANIA
Creators: name: Namoniuk, Vasyl
name: ZILINSKIENE, Inga
Publisher: name: figshare
Year: 2021
Subjects: subject: Economics
subject: 140210 International Economics and International Finance
subject: FOS: Economics and business

description: The paper analyses the differences and opportunities of two CBDC models that are being implemented in both countries, and the key success factors and barriers.
A nova Lei das Agências Reguladoras impressões iniciais
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Por Cristiana Fortini e Gabriel Fajardo Em um contexto em que a segurança jurídica e a governança das instituições são cada vez mais reclamadas tanto por investidores privados quanto pela sociedade e agentes públicos, o aperfeiçoamento das normas jurídicas relativas às agências reguladoras não pode ser negligenciado.
N=8 Supergravity 4-point Amplitudes
Creators: name: Kallosh, Renata
name: Lee, Ching Hua
name: Rube, Tomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the explicit expressions in N=8 supergravity for the bosonic 4-particle tree and 1-loop amplitudes including vectors and scalars. We also present the candidate 4-point UV divergences in a form of helicity amplitudes, corresponding to 3-loop manifestly N=8 supersymmetric and Lorentz covariant counterterm. This may shed some light on the 3-loop finiteness of N=8 SG and on a conjectured higher loop finiteness. We perform a supersymmetric deformation to complex momentum of the 4-point generating function including higher-loop counterterms and the 1-loop UV finite amplitudes. Using the explicit form of the scalar part of the 3-loop counterterm and of the 1-loop UV finite scalar 4-point amplitudes we find that they both have an unbroken E7 symmetry. We derive from E7 symmetry the low-energy theorem for the 1-loop n-point amplitudes.
description: 23 p, 4 figures
Evidence for accretion in a nearby, young brown dwarf
Creators: name: Reiners, Ansgar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report on the discovery of the young, nearby, brown dwarf 2MASS J0041353$-$562112. The object has a spectral type of M7.5, it shows Li absorption and signatures of accretion, which implies that it still has a disk and suggests an age below 10 Myr. The space motion vector and position on the sky indicate that the brown dwarf is probably a member of the $\sim$20 Myr old Tuc-Hor association, or that it may be an ejected member of the $\sim$12 Myr old $β$ Pic association, both would imply that 2MASS J0041353$-$562112 may in fact be older than 10 Myr. No accreting star or brown dwarf was previously known in these associations. Assuming an age of 10 Myr, the brown dwarf has a mass of about 30 M$_{\rm Jup}$ and is located at 35 pc distance. The newly discovered object is the closest accreting brown dwarf known. Its membership to an association older than 10 Myr implies that either disks in brown dwarfs can survive as long as in more massive stars, perhaps even longer, or that star formation in Tuc-Hor or $β$ Pic occured more recently than previously thought. The history and evolution of this object can provide new fundamental insight into the formation process of stars, brown dwarfs, and planets.
description: emulateapj version, online version at http://www.iop.org/EJ/abstract/1538-4357/702/2/L119/
Geometry-Driven Mechanical Memory in a Random Fibrous Matrix
Creators: name: Sarkar, Mainak
name: Laukaitis, Christina
name: Johnson, Amy Wagoner
Publisher: name: arXiv
Year: 2025
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Disordered fibrous matrices, formed by the random assembly of fibers, provide the structural framework for many biological systems and biomaterials. Applied deformation modifies the alignment and stress states of constituent fibers, tuning the nonlinear elastic response of these materials. While it is generally presumed that fibers return to their original configurations after deformation is released, except when neighboring fibers coalesce or individual fibers yield, this reversal process remains largely unexplored. The intricate geometry of these matrices leaves an incomplete understanding of whether releasing deformation fully restores the matrix or introduces new microstructural deformation mechanisms. To address this gap, we investigated the evolution of matrix microstructures during the release of an applied deformation. Numerical simulations were performed on quasi-two-dimensional matrices of random fibers under localized tension, with fibers modeled as beams in finite element analysis. After tension release, the matrix exhibited permanent mechanical remodeling, with greater remodeling occurring at higher magnitudes of applied tension, indicative of the matrix preserving its loading history as mechanical memory. This response was surprising; it occurred despite the absence of explicit plasticity mechanisms, such as activation of inter-fiber cohesion or fiber yielding. We attributed the observed remodeling to the gradient in fiber alignment that developed within the matrix microstructure under applied tension, driving the subsequent changes in matrix properties during the release of applied tension. Therefore, random fibrous matrices tend to retain mechanical memory due to their intricate geometry.
Regularity for free multiplicative convolution on the unit circle
Creators: name: Belinschi, Serban T.
name: Bercovici, Hari
name: Ho, Ching-Wei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L54

description: It is shown that the free multiplicative convolution of two nondegenerate probability measures on the unit circle has no continuous singular part relative to arclength measure. Analogous results have long been known for free additive convolutions on the line and free multiplicative convolution on the positive half-line.
Mudanças na manifestação de interesse diante doC
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Foi publicado no Diário Oficial da União de 07/11/2019 o Decreto Federal n° 10.104/2019, que promoveu alterações no Decreto Federal n° 8.428/2015, regulamentador do Procedimento de Manifestação de Interesse – PMI a ser observado na esfera federal.
Letter of Hon. James Shields, addressed to a committee of his fellow-citizens, at Galena, Illinois :Washington, August 5, 1852.
Creators: name: Shields, James
Publisher: name: University of Notre Dame
Year: 2023

description:
 Caption title.
 At head of title: Please read and circulate.
 Appendix. p. 3-4. General Pierce and the Catholics -- General Scott on the naturalization laws.
Search for electroweak production of charginos and neutralinos at $\sqrt{s}$ = 13 TeV in final states containing hadronic decays of WW, WZ, or WH and missing transverse momentum
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This Letter presents a search for direct production of charginos and neutralinos via electroweak interactions. The results are based on data from proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb$^{-1}$. The search considers final states with large missing transverse momentum and pairs of hadronically decaying bosons WW, WZ, and WH, where H is the Higgs boson. These bosons are identified using novel algorithms. No significant excess of events is observed relative to the expectations from the standard model. Limits at the 95% confidence level are placed on the cross section for production of mass-degenerate wino-like supersymmetric particles $\tildeχ_1^\pm$ and $\tildeχ_2^0$, and mass-degenerate higgsino-like supersymmetric particles $\tildeχ_1^\pm$, $\tildeχ_2^0$, and $\tildeχ_3^0$. In the limit of a nearly-massless lightest supersymmetric particle $\tildeχ_1^0$, wino-like particles with masses up to 870 and 960 GeV are excluded in the cases of $\tildeχ_2^0$ $\to$ Z$\tildeχ_1^0$ and $\tildeχ_2^0$ $\to$ H$\tildeχ_1^0$, respectively, and higgsino-like particles are excluded between 300 and 650 GeV.
description: Replaced with the published version. Added the journal reference. All the figures and tables, including additional supplementary figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-21-002 (CMS Public Pages)
Hall plateaus at magic angles in bismuth beyond the quantum limit
Creators: name: Fauque, Benoit
name: Yang, Huan
name: Sheikin, Ilya
name: Balicas, Luis
name: Issi, Jean-Paul
name: Behnia, Kamran
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a study of the angular dependence of the resistivity tensor up to 35 T in elemental bismuth complemented by torque magnetometry measurements in a similar configuration. For at least two particular field orientations a few degrees off the trigonal axis, the Hall resistivity was found to become field-independent within experimental resolution in a finite field window corresponding to a field which is roughly three times the frequency of quantum oscillations. The Hall plateaus rapidly vanish as the field is tilted off theses magic angles. We identify two distinct particularities of these specific orientations, which may play a role in the emergence of the Hall plateaus.
description: 5 pages, 5 figures
Leptophilic Gauge Bosons at Lepton Beam Dump Experiments
Creators: name: Moroi, Takeo
name: Niki, Atsuya
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has been recently known that we can use beams of future lepton colliders, the International Linear Collider (ILC), the Compact Linear Collider (CLIC), and the muon collider, for beam dump experiments if a shield and a detector are installed behind the beam dump. We study the prospect of searching for leptophilic gauge bosons (LGBs) in association with $U(1)_{L_e-L_μ}$, $U(1)_{L_e-L_τ}$, and $U(1)_{L_μ-L_τ}$ gauge symmetries at such lepton beam dump experiments. We perform a detailed calculation of the event rates of the LGB events, taking into account bremsstrahlung and pair-annihilation processes. We show that the lepton beam dump experiments at future lepton colliders can reach parameter regions which are not been covered.
Single-particle excitations under coexisting electron correlation and disorder: a numerical study of the Anderson-Hubbard model
Creators: name: Shinaoka, Hiroshi
name: Imada, Masatoshi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Interplay of electron correlation and randomness is studied by using the Anderson-Hubbard model within the Hartree-Fock approximation. Under the coexistence of short-range interaction and diagonal disorder, we obtain the ground-state phase diagram in three dimensions, which includes an antiferromagnetic insulator, an antiferromagnetic metal, a paramagnetic insulator (Anderson-localized insulator) and a paramagnetic metal. Although only the short-range interaction is present in this model, we find unconventional soft gaps in the insulating phases irrespective of electron filling, spatial dimensions and long-range order, where the single-particle density of states (DOS) vanishes with a power-law scaling in one dimension (1D) or even faster in two dimensions (2D) and three dimensions (3D) toward the Fermi energy. We call it soft Hubbard gap. Moreover, exact-diagonalization results in 1D support the formation of the soft Hubbard gap beyond the mean-field level. The formation of the soft Hubbard gap cannot be attributed to a conventional theory by Efros and Shklovskii (ES) owing the emergence of soft gaps to the long-range Coulomb interaction. Indeed, based on a picture of multivalley energy landscape, we propose a phenomenological scaling theory, which predicts a scaling of the DOS in perfect agreement with the numerical results. We further discuss a correction of the scaling of the DOS by the long-range part of the Coulomb interaction, which modifies the scaling of Efros and Shklovskii. Furthermore, explicit formulae for the temperature dependence of the DC resistivity via variable-range hopping under the influence of the soft gaps are derived. Finally, we compare the present theory with experimental results of SrRu_{1-x}Ti_xO_3.
description: 22 pages, 19 figures
O vírus e a necessidade de empatia nas concessões de transporte
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Não há máscaras ou álcool capazes de impedir a invisível presença do vírus, mesmo em ambientes supostamente protegidos. Ele atinge nossos vínculos mais íntimos, impacta as relações afetivas, e, claro, não há instrumento apto a deter o seu impacto nos contratos celebrados com o Estado. Muito se tem dito a respeito dos contratos ordinários, assim rotulados os vínculos disciplinados pela Lei Geral de Licitações e Contratos Administrativos, vitais para suprir as demandas relacionadas à pandemia e por isso destinatários de um conjunto de regras especiais, em que se destacam aquelas contidas na Lei 13.979/20.
Resolution Limits of Resonant Sensors with Duffing Non-Linearity
Creators: name: Manzaneque, Tomás
name: Ghatkesar, Murali K.
name: Alijani, Farbod
name: Xu, Minxing
name: Norte, Richard A.
name: Steeneken, Peter G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The resolution of resonant sensors is fundamentally limited by the presence of noise. Thermomechanical noise, intrinsic to the resonator, sets the ultimate sensor performance when all other noise sources have been eliminated. For linear resonators, the sensing resolution can always be further improved by increasing the driving power. However, this trend cannot continue indefinitely, since at sufficiently high driving powers non-linear effects emerge and influence the noise performance. As a consequence, the resonator's non-linear characteristics play an inextricable role in determining its ultimate resolution limits. Recently, several works have studied the characteristic performance of non-linear resonators as sensors, with the counter intuitive conclusion that increasing the quality factor of a resonator does not improve its sensing resolution at the thermomechanical limit. In this work we further analyze the ultimate resolution limits, and describe different regimes of performance at integration times below and above the resonator's decay time. We provide an analytical model to elucidate the effects of Duffing non-linearity on the resolution of closed-loop sensors, and validate it using numerical simulations. In contrast to previous works, our model and simulations show that under certain conditions the ultimate sensing resolution of a Duffing resonator can be improved by maximizing its quality factor. With measurements on a nanomechanical membrane resonator, we experimentally verify the model and demonstrate that frequency resolutions can be achieved that surpass the previously known limits.
description: 15 pages, 5 figures
Spin-triplet superconductivity at the onset of isospin order in biased bilayer graphene
Creators: name: Dong, Zhiyu
name: Chubukov, Andrey V.
name: Levitov, Leonid
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The quest for unconventional superconductivity governed by Coulomb repulsion between electrons rather than phonon attraction received new momentum with the advent of moiré graphene. Initially, delineating the phonon and Coulomb-repulsion-based pairing mechanisms has proven to be a challenging task, however the situation has changed after recent discovery of superconductivity in non-twisted graphene bilayers and trilayers. Superconductivity occurring at the phase boundaries of spin and valley polarized orders calls for non-phonon scenarios, yet the specific pairing mechanisms remain to be understood. Here we analyze a striking example -- superconductivity in graphene bilayers occurring at the onset of valley-polarized order induced by a magnetic field. We describe an attraction-from-repulsion mechanism for pairing mediated by a quantum-critical mode, which fully explains the observed phenomenology. While it is usually notoriously difficult to infer the pairing mechanism from the observed superconducting phases, this case presents a rare exception, allowing for a fairly unambiguous identification of the origin of the pairing glue. A combination of factors such as the location of superconducting phase at the onset of isospin-polarized phase, a threshold in a magnetic field, above which superconductivity occurs, and its resilience at high magnetic fields paints a clear picture of a triplet superconductivity driven by quantum-critical fluctuations.
Epistemological Letters 24
Creators: name: Garuccio, A
name: de Charriere, C.
name: Bonsack, F.
name: Selleri, F.
name: Jochim, H.
name: Destouches, J.-L.
name: Hadjisavvas, N.
name: Costa de Beauregard, O.
name: Cook, R.M.
Publisher: name: University of Notre Dame
Year: 2023

description: Issue 24 is a written symposium on the foundations of quantum physics, edited by François Bonsack, Abner Shimony, and others. It was published and distributed to a limited mailing list by Association Ferdinand Gonseth.
Excess mortality in adults with documented diabetes in Germany: routine data analysis of all insurance claims in Germany 2013–2014
Creators: name: Schmidt, Christian
name: Reitzle, Lukas
name: Heidemann, Christin
name: Paprott, Rebecca
name: Ziese, Thomas
name: Scheidt-Nave, Christa
name: Baumert, Jens
Publisher: name: Robert Koch-Institut
Year: 2021
Subjects: subject: 610 Medizin und Gesundheit

description: Objectives: Little is known about the age-specific excess mortality pattern of people with diagnosed diabetes in Germany. Thus, our goal was to determine the excess mortality in diagnosed diabetes overall and stratified by age and sex based on claims data. Design: Routine data analysis using a claims dataset from all statutory health-insured persons in Germany in 2013, which accounts for about 90% of the population. Participants: We included persons who lived in Germany, were insured at least 360 days, were not self-paying any health services and were aged 30 years or older leading to a total number of 47.3 million insured persons for analyses. Exposure: Diabetes was determined by the International Classification of Diseases-10 codes E10–E14, which were documented in 2013 in at least two-quarters on an outpatient setting or at least once on an inpatient setting. Outcome measures: The vital status in the study population was drawn from the claims dataset for the year 2014. We derived the excess mortality estimated as an age-adjusted mortality rate ratio (MRR) by sex and for age groups using a Poisson model. Main results: We found age-adjusted MRRs (95% CI) for diabetes of 1.52 (1.51 to 1.52) for women and 1.56 (1.56 to 1.56) for men. These figures declined with increasing age and were highest for ages 30–34 years with 6.76 (4.99 to 9.15) for women and 6.87 (5.46 to 8.64) for men, and lowest for age 95 years and older with 1.13 (1.10 to 1.15) for women and 1.11 (1.05 to 1.17) for men. Conclusions: We derived deeply age-stratified figures on excess mortality in diabetes for Germany. Establishing a sustainable analysis of excess mortality is aimed at within the framework of diabetes surveillance.
Pressure-induced lattice collapse in tetragonal phase and structural phase transition in single crystalline Fe1.05Te
Creators: name: Zhang, Chao
name: Yi, Wei
name: Sun, Liling
name: Lu, Wei
name: Dong, Xiaoli
name: Bai, Ligang
name: Liu, Jing
name: Chen, Genfu
name: Wang, Nanlin
name: Zhao, Zhongxian
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report studies of in-situ x-ray diffraction (XRD) and electronic properties on the single crystalline of Fe1.05Te compound under high pressure. The results demonstrated that the sample undergoes a pressure-induced lattice collapse in tetragonal phase (cT) at 4 GPa at room temperature. The cT phase in turn transfers to monoclinic (M) phase with increasing pressure to 14 GPa. The resistance measurements under pressures show that the onset temperature of structural phase transition (TSTR) decreases upon transformation from the tetragonal (T) to the cT phase and turns up at the 4 GPa where is the boundary pressure of T-cT phase. The onset of antiferromagnetic transition (TAF) shows little change up to 0.8 GPa by magnetization measurements. In the domain of M phase, the sample behaves like semiconductor at low temperature. No superconductivity is observed under the pressure investigated.
description: 17 pages, 5 figures
Multimode optical fiber beam-by-beam cleanup
Creators: name: Ferraro, Mario
name: Mangini, Fabio
name: Leventoux, Yann
name: Tonello, Alessandro
name: Zitelli, Mario
name: Sun, Yifan
name: Fevrier, Sebastien
name: Krupa, Katarzyna
name: Kharenko, Denis
name: Wabnitz, Stefan
name: Couderc, Vincent
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We introduce and experimentally demonstrate the concept of all-optical beam switching in graded-index multimode optical fibers. Nonlinear coupling between orthogonally polarized seed and signal beams permits to control the spatial beam quality at the fiber output. Remarkably, we show that even a weak few-mode control beam may substantially enhance the quality of an intense, highly multimode signal beam. We propose a simple geometrical representation of the beam switching operation, whose validity is quantitatively confirmed by the experimental mode decomposition of the output beam. All-optical switching of multimode beams may find important applications in high-power beam delivery and fiber lasers.
Moses the Egyptian in the Illustrated Old English Hexateuch (London, British Library Cotton MS Claudius B.iv)
Creators: name: Broderick, Herbert R.
Publisher: name: University of Notre Dame
Year: 2023

description: \u000aIn _Moses the Egyptian_, Herbert Broderick analyzes the iconography of Moses in the famous illuminated eleventh-century manuscript known as the Illustrated Old English Hexateuch. A translation into Old English of the first six books of the Bible, the manuscript contains over 390 images, of which 127 depict Moses with a variety of distinctive visual attributes.\u000a \u000aBroderick presents a compelling thesis that these motifs, in particular the image of the horned Moses, have a Hellenistic Egyptian origin. He argues that the visual construct of Moses in the Old English Hexateuch may have been based on a Late Antique, no longer extant, prototype influenced by works of Hellenistic Egyptian Jewish exegetes, who ascribed to Moses the characteristics of an Egyptian-Hellenistic king, military commander, priest, prophet, and scribe. These Jewish writings were utilized in turn by early Christian apologists such as Clement of Alexandria and Eusebius of Caesarea. Broderick's analysis of this Moses imagery ranges widely across religious divides, art-historical religious themes, and classical and early Jewish and Christian sources.\u000a \u000aHerbert Broderick is one of the foremost historians in the field of Anglo-Saxon art, with a primary focus on Old Testament iconography. Readers with interests in the history of medieval manuscript illustration, art history, and early Jewish and Christian apologetics will find much of interest in this profusely illustrated study.\u000a
Entanglement and level crossings in frustrated ferromagnetic rings
Creators: name: Haque, Masudul
name: Chandra, V. Ravi
name: Bandyopadhyay, Jayendra N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the entanglement content of a class of mesoscopic tunable magnetic systems. The systems are closed finite spin-1/2 chains with ferromagnetic nearest-neighbor interactions frustrated by antiferromagnetic next-nearest-neighbor interactions. The finite chains display a series of level crossings reflecting the incommensurate physics of the corresponding infinite-size chain. We present dramatic entanglement signatures characterizing these unusual level crossings. We focus on multi-spin and global measures of entanglement rather than only one-spin or two-spin entanglements. We compare and contrast the information obtained from these measures to that obtained from traditional condensed matter measures such as correlation functions.
description: 6+ pages, 5 figures
Novo marco das licitações primeiras impressões sobre o PL 6.814/17
Creators: name: Fortini, Cristiana
name: Motta, Fabrício
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Por Fabrício Motta e Cristiana Fortini Não seria exagerado dizer que o debate a respeito dos méritos e deméritos da Lei 8.666 / 93 persiste desde sua edição. O tema tem ganhado novos contornos em razão da crescente necessidade de agilidade, eficiência e economicidade das contratações públicas, sem desconsiderar a importância de prevenir a corrupção e criar um ambiente de segurança jurídica apto a atrair bons contratantes.
Direct Evidence of Cold Gas in DLA 0812+32B
Creators: name: Jorgenson, Regina A.
name: Wolfe, Arthur M.
name: Prochaska, J. Xavier
name: Carswell, Robert F.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the first direct evidence for cold gas in a high redshift DLA galaxy. We measured several multiplets of weak neutral carbon (CI) transitions in order to perform a curve of growth analysis. A delta chi-squared test constrains the best fit Doppler parameter, b = 0.33_{-0.04}^{+0.05} km/s, and logN(CI) = 13.30 +- 0.2 cm^-2. This Doppler parameter constrains the kinetic temperature of the gas to T <= 78 K (T <= 115 K, 2 sigma). We used the associated CI fine structure lines to constrain the volume density of the gas, n(HI) ~ 40 - 200 cm^-3 (2 sigma), resulting in a lower limit on the cloud size of approximately 0.1 - 1 parsec. While it is difficult to determine the metallicity of the cold component, the absence of Cr II indicates that the cold cloud suffers a high level of dust depletion. Additionally, the large amount of Lyman and Werner-band molecular hydrogen absorption (log N(H2)_{total} = 19.88 cm^-2, f_{H_2} >= 0.06) with an excitation temperature of T_{ex} = 46 K as determined by the rotational J = 0 and J = 1 states, is consistent with the presence of cold gas. We propose that this cloud may be gravitationally confined and may represent a transition gas-phase from primarily neutral atomic gas, to a colder, denser molecular phase that will eventually host star formation.
description: Accepted for publication in ApJ, 5 pages, 8 figures
Arbitrary rotation invariant random matrix ensembles and supersymmetry: orthogonal and unitary-symplectic case
Creators: name: Kieburg, Mario
name: Grönqvist, Johan
name: Guhr, Thomas
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: PACS: 02.30.Px, 05.30.Ch, 05.30.-d, 05.45.Mt

description: Recently, the supersymmetry method was extended from Gaussian ensembles to arbitrary unitarily invariant matrix ensembles by generalizing the Hubbard-Stratonovich transformation. Here, we complete this extension by including arbitrary orthogonally and unitary-symplectically invariant matrix ensembles. The results are equivalent to, but the approach is different from the superbosonization formula. We express our results in a unifying way. We also give explicit expressions for all one-point functions and discuss features of the higher order correlations.
description: 37 pages
Localized standing waves in inhomogeneous Schrodinger equations
Creators: name: Marangell, R.
name: Jones, C. K. R. T.
name: Susanto, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A nonlinear Schrodinger equation arising from light propagation down an inhomogeneous medium is considered. The inhomogeneity is reflected through a non-uniform coefficient of the non-linear term in the equation. In particular, a combination of self-focusing and self-defocusing nonlinearity, with the self-defocusing region localized in a finite interval, is investigated. Using numerical computations, the extension of linear eigenmodes of the corresponding linearized system into nonlinear states is established, particularly nonlinear continuations of the fundamental state and the first excited state. The (in)stability of the states is also numerically calculated, from which it is obtained that symmetric nonlinear solutions become unstable beyond a critical threshold norm. Instability of the symmetric states is then investigated analytically through the application of a topological argument. Determination of instability of positive symmetric states is reduced to simple geometric properties of the composite phase plane orbit of the standing wave. Further the topological argument is applied to higher excited states and instability is again reduced to straightforward geometric calculations. For a relatively high norm, it is observed that asymmetric states bifurcate from the symmetric ones. The stability and instability of asymmetric states is also considered.
description: Suggestions and comments are welcome
On the Hunt for the Origins of the Orphan--Chenab Stream: Detailed Element Abundances with APOGEE and Gaia
Creators: name: Hawkins, Keith
name: Price-Whelan, Adrian M.
name: Sheffield, Allyson A.
name: Subrahimovic, Aidan Z.
name: Beaton, Rachael L.
name: Belokurov, Vasily
name: Erkal, Denis
name: Koposov, Sergey E.
name: Lane, Richard R.
name: Laporte, Chervin F. P.
name: Nitschelm, Christian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar streams in the Galactic halo are useful probes of the assembly of galaxies like the Milky Way. Many tidal stellar streams that have been found in recent years are accompanied by a known progenitor globular cluster or dwarf galaxy. However, the Orphan--Chenab (OC) stream is one case where a relatively narrow stream of stars has been found without a known progenitor. In an effort to find the parent of the OC stream, we use astrometry from the early third data release of ESA's Gaia mission (Gaia EDR3) and radial velocity information from the SDSS-IV APOGEE survey to find up to 13 stars that are likely members of the OC stream. We use the APOGEE survey to study the chemical nature (for up to 13 stars) of the OC stream in the $α$ (O, Mg, Ca, Si, Ti, S), odd-Z (Al, K, V), Fe-peak (Fe, Ni, Mn, Co, Cr) and neutron capture (Ce) elemental groups. We find that the stars that make up the OC stream are not consistent with a mono-metallic population and have a median metallicity of --1.92~dex with a dispersion of 0.28 dex. Our results also indicate that the $α$-elements are depleted compared to the known Milky Way populations and that its [Mg/Al] abundance ratio is not consistent with second generation stars from globular clusters. The detailed chemical pattern of these stars indicates that the OC stream progenitor is very likely to be a dwarf spheroidal galaxy with a mass of ~10$^6$ M$_\odot$.
description: 13 Pages; 4 Figures. Submitted to AAS Journals, comments welcome
A variational wave function for the ground state of He³, and its application to the D(p,y)He³ capture reaction
Creators: name: Banville, Marcel Roland
Publisher: name: University of British Columbia
Year: 2011

description: The present work proposes trial wave functions for the three-body problem in nuclear physics taking into account the group theoretical classification of the states given by Derrick and Blatt and by Verde. We start from the Schroedinger equation in the internal variables (the interparticle distances) obtained by Derrick from a summation over the matrix elements for kinetic energy and potential energy extended over all variables except the internal variables. An “equivalent" Schroedinger equation is set up using a potential due to Eckart. This equation has the same form as the original Schroedinger equation in the region outside the range of the nuclear forces. The variables in this equation can be separated in a hyperspherical coordinate system and the resulting separate equations can be solved. Then using a superposition principle the solutions of the original equation are expanded in terms of solutions to the "equivalent" equation. The Rayleigh-Ritz variational procedure is used to determine the coefficients of the expansions with a given potential. Because of the computational labor involved significant approximation is made in allowing only the leading terms in the angular variables to appear in the expansions while keeping a sufficient number of radial terms to insure convergence. The present functions with a radial variable R = [formula omitted] give less than 1/2 of the binding energy predicted by Blatt, Derrick and Lyness (1962) who used a radial variable R = r₁₂ + r₂₃ + r₃₁. This shows that our approximation with the former radial variable is indeed too crude to predict a reliable value for the binding energy and that more angular terms must be included in the expansions, at least for the preponderent symmetric S-state. Wave functions derived by the Rayleigh-Ritz variational principle are used to calculate cross sections for the reaction D(p, γ)He³. The electric dipole cross section depends very sensitively on the potential used to derive the wave function and a comparison with experimental data provides a test of the various model assumptions used to describe the nuclear interaction. A realistic potential must contain a tensor potential plus a hard core in the central potential. The tensor interaction couples the S and D states and is necessary to explain the quadrupole moment of He³ while the hard core produced the required mixed-symmetry S-state. The experimentally observed isotropic component of the gamma ray yield is attributed to a magnetic dipole transition between a continuum quartet S-state and the mixed-symmetry component of the ground state wave function. For a range of the variable parameter used in the calculation comparison with experiment requires a 5% admixture of the mixed-symmetry S-state in the ground state wave function.