cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Square skyrmion crystal in centrosymmetric itinerant magnets
Creators: name: Hayami, Satoru
name: Motome, Yukitoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically investigate the origin of the square-type skyrmion crystal in centrosymmetric itinerant magnets, motivated from the recent experimental finding in GdRu$_2$Si$_2$ [N. D. Khanh $\mathit{et}$ $\mathit{al.}$, Nat. Nanotech. $\mathbf{15}$, 444 (2020)]. By simulated annealing for an effective spin model derived from the Kondo lattice model on a square lattice, we find that a square skyrmion crystal composed of a superposition of two spin helices is stabilized in a magnetic field by synergy between the positive biquadratic, bond-dependent anisotropic, and easy-axis anisotropic interactions. This is in stark contrast to triangular skyrmion crystals which are stabilized by only one of the three, suggesting that the square skyrmion crystal is characteristic of itinerant magnets with magnetic anisotropy. We also show that a variety of noncollinear and noncoplanar spin textures appear depending on the model parameters as well as the applied magnetic field. The present systematic study will be useful not only for identifying the key ingredients in GdRu$_2$Si$_2$ but also for exploring further skyrmion-hosting materials in centrosymmetric itinerant magnets.
description: 12 pages, 10 figures
Cylindrical Collapse and Gravitational Waves
Creators: name: Herrera, L.
name: Santos, N. O.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the matching conditions for a collapsing anisotropic cylindrical perfect fluid, and we show that its radial pressure is non zero on the surface of the cylinder and proportional to the time dependent part of the field produced by the collapsing fluid. This result resembles the one that arises for the radiation - though non-gravitational - in the spherically symmetric collapsing dissipative fluid, in the diffusion approximation.
description: Some comments and a new reference added. To appear in Class. Quantum. Grav
Gemeinsame Tagesordnung für Initiativgruppen und verfaßte Kirchen?
Creators: name: Linz, Johanna
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 42 Nr. 3 (1993): Ökumenische Rundschau, Band 42, Heft 3
Regulation of amyloid precursor protein catabolism in vitro : the role of mitogen-activited protein kinase and protein kinase C
Creators: name: Mills, Julia
Publisher: name: University of British Columbia
Year: 2009

description: Secretory processing of the amyloid precursor protein (APP) generating soluble APP fragments occurs via two routes broadly categorized as non-amyloidogenic (yielding a truncated APP derivative known as APPS) or potentially amyloidogenic (yielding intact Aβ). These catabolic pathways are mutually exclusive and subject to regulation by various first messengers. In continuous cell lines, nonamyloidogenic processing of APP is increased by cholinergic receptor stimulation and its downstream effector protein kinase C (PKC). However, at the time our first set of experiments were initiated, mechanisms underlying APP catabolism in central neurons were largely unknown. Therefore, we examined whether or not first or second messengers of cholinergic neurotransmission increase APPS in primary cultures of rat cortical neurons. Using western blot analysis to measure secreted proteins, we determined that although activation of PKC by phorbol esters increased production of APPS, activation of muscarinic receptors by oxotremorine-M or carbachol did not. One explanation for this apparent discrepancy is that cholinergic agonists and phorbol esters activate downstream effectors differentially. One such effector may be mitogen-activated protein kinase (MAPK) also known as extracellular signal-regulated protein kinase (ERK). APP has been shown to be regulated by a variety of first messengers which also regulate this signaling pathway. Specifically, we hypothesized that regulation of APP processing may involve the sequential activation of the enzymes MAPK kinase (MEK) and ERK. We provide evidence that the MAPK pathway is critically involved in regulation of APP processing by nerve growth factor (NGF), phorbol esters and A^-methyl-D-aspartate (NMDA). Western blot analysis of APPS demonstrated that the MEK inhibitor PD 98059 antagonized NGF stimulation of APPS production in a neuronal cell line. Moreover, inhibition of MEK blocked phorbol ester regulation of APPS in cortical neurons and Aβ release in cell lines. Finally, overexpression of a kinase-inactive MEK mutant inhibited both phorbol ester and NMDA receptor stimulation of APPS. Taken together, these data indicate that the MAPK pathway may be critically involved in regulating APP processing. As signal transduction is intimately associated with amyloid burden in Alzheimer's disease, understanding the critical effector systems responsible for this mismetabolism of APP is necessary in order for effective treatment strategies to be generated.
Light Quantum Control of Persisting Higgs Modes in Iron-Based Superconductors
Creators: name: Vaswani, C.
name: Kang, J. H.
name: Mootz, M.
name: Luo, L.
name: Yang, X.
name: Sundahl, C.
name: Cheng, D.
name: Huang, C.
name: Kim, R. H. J.
name: Liu, Z.
name: Collantes, Y. G.
name: Hellstrom, E. E.
name: Perakis, I. E.
name: Eom, C. B.
name: Wang, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Higgs mechanism, i.e., spontaneous symmetry breaking of the quantum vacuum, is a cross-disciplinary principle, universal for understanding dark energy, antimatter and quantum materials, from superconductivity to magnetism. Yet, Higgs modes in one-band superconductors (SCs) are currently under debate due to their competition with charge-density fluctuations. A distinct Higgs mode, controllable by terahertz (THz) laser pulses, can arise in multi-band, unconventional SCs via strong {\em interband} Coulomb interaction, but is yet to be accessed. Here we both discover and demonstrate quantum control of such collective mode in iron-based high-temperature superconductors. Using two-pulse, phase coherent THz spectroscopy, we observe a tunable and coherent 2$Δ_{\mathrm{SC}}$ amplitude oscillation of the complex order parameter in such SC with coupled lower and upper bands. The nonlinear dependence of the amplitude mode oscillations on the THz driving fields is distinct from any one-band and conventional SC results: we observe a large nonlinear change of resonance strength, yet with a persisting mode frequency. We argue that this result provides compelling evidence for a transient coupling between the electron and hole amplitude modes via strong interband coherent interaction. To support this scenario, we perform quantum kinetic modeling of a hybrid Higgs mechanism without invoking extra disorder or phonons. In addition to distinguishing between collective modes and charge fluctuations, the light quantum control of multiband SCs can be extended to probe and manipulate many-body entanglement and hidden symmetries in different quantum materials.
New Developments in the Spectral Asymptotics of Quantum Gravity
Creators: name: Esposito, Giampiero
name: Fucci, Guglielmo
name: Kamenshchik, Alexander Yu.
name: Kirsten, Klaus
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A vanishing one-loop wave function of the Universe in the limit of small three-geometry is found, on imposing diffeomorphism-invariant boundary conditions on the Euclidean 4-ball in the de Donder gauge. This result suggests a quantum avoidance of the cosmological singularity driven by full diffeomorphism invariance of the boundary-value problem for one-loop quantum theory. All of this is made possible by a peculiar spectral cancellation on the Euclidean 4-ball, here derived and discussed.
description: 7 pages, latex file. Paper prepared for the Conference "QFEXT05: Quantum Field Theory Under the Influence of External Conditions", Barcelona, September 5 - September 9, 2005. In the final version, the presentation has been further improved, and yet other References have been added
Integration and geometrization of Rota-Baxter Lie algebras
Creators: name: Guo, Li
name: Lang, Honglei
name: Sheng, Yunhe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 22A22, 22E60, 17B38, 17B40, 81R12, 58C35

description: This paper first introduces the notion of a Rota-Baxter operator (of weight $1$) on a Lie group so that its differentiation gives a Rota-Baxter operator on the corresponding Lie algebra. Direct products of Lie groups, including the decompositions of Iwasawa and Langlands, carry natural Rota-Baxter operators. Formal inverse of the Rota-Baxter operator on a Lie group is precisely the crossed homomorphism on the Lie group, whose tangent map is the differential operator of weight $1$ on a Lie algebra. A factorization theorem of Rota-Baxter Lie groups is proved, deriving directly on the Lie group level, the well-known global factorization theorems of Semenov-Tian-Shansky in his study of integrable systems. As geometrization, the notions of Rota-Baxter Lie algebroids and Rota-Baxter Lie groupoids are introduced, with the former a differentiation of the latter. Further, a Rota-Baxter Lie algebroid naturally gives rise to a post-Lie algebroid, generalizing the well-known fact for Rota-Baxter Lie algebras and post-Lie algebras. It is shown that the geometrization of a Rota-Baxter Lie algebra or a Rota-Baxter Lie group can be realized by its action on a manifold. Examples and applications are provided for these new notions.
description: 24 pages. Section 3 revised. Comments welcome
Dispersion forces between an atom and a perfectly conducting wedge
Creators: name: Mendes, T. N. C.
name: Rosa, F. S. S.
name: Tenorio, A.
name: Farina, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the interaction between an electrically polarizable atom in its fundamental state and a wedge constituted by two semi-infinite perfectly conducting plates. Using a formalism based on a master equation, we compute the dispersion force on the atom for both retarded and non-retarded regimes.
description: Work presented at the conference QFEXT07, held in Leipzig
Plasma steering to avoid disruptions in ITER and tokamak power plants
Creators: name: Boozer, Allen H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Steering tokamak plasmas is commonly viewed as a way to avoid disruptions and runaway electrons. Plasma steering sounds as safe as driving to work but will be shown to more closely resemble driving at high speed through a dense fog on an icy road. The long time required to terminate an ITER discharge compared to time over which dangers can be foreseen is analogous to driving in a dense fog. The difficulty of regaining plasma control if it is lost resembles driving on an icy road. Disruptions and runaways are associated with three issues -- a solution to one tends to complicate the solution to the other two: loss of plasma position control, excessive heat deposition, and wall melting due to runaway electrons. All three risks must be addressed for ITER to achieve its mission and essentially eliminated before tokamak power plants can be deployed.
description: Accepted by the journal Nuclear Fusion
Capillary waves at the liquid-vapor interface and the surface tension of water models
Creators: name: Ismail, Ahmed E.
name: Grest, Gary S.
name: Stevens, Mark J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Capillary waves occurring at the liquid-vapor interface of water are studied using molecular dynamics simulations. In addition, the surface tension, determined thermodynamically from the difference in the normal and tangential pressure at the liquid-vapor interface, is compared for a number of standard three- and four-point water models. We study four three-point models (SPC/E, TIP3P, TIP3P-CHARMM, and TIP3P-Ew) and two four-point models (TIP4P and TIP4P-Ew). All of the models examined underestimate the surface tension; the TIP4P-Ew model comes closest to reproducing the experimental data. The surface tension can also be determined from the amplitude of capillary waves at the liquid-vapor interface by varying the surface area of the interface. The surface tensions determined from the amplitude of the logarithmic divergence of the capillary interfacial width and from the traditional thermodynamic method agree only if the density profile is fitted to an error function instead of a hyperbolic tangent function.
description: 11 pages, 8 figures, 7 tables. Accepted for publication in J. Chem. Phys. [v2: Added references, corrected minor errors]
title: Dagstuhl Reports, Table of Contents, Volume 13, Issue 4, 2023
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: Table of Contents
subject: Frontmatter

description: Dagstuhl Reports, Table of Contents, Volume 13, Issue 4, 2023
description: DagRep, Volume 13, Issue 4, pages i-ii
Hedgehog-lattice spin texture in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice
Creators: name: Aoyama, Kazushi
name: Kawamura, Hikaru
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The hedgehog lattice, a three-dimensional periodic array of magnetic monopoles and antimonopoles, is known to be realized in the presence of the Dzyaloshinskii-Moriya (DM) interaction. Here, we demonstrate by means of Monte Carlo simulations that the hedgehog lattice is induced by not the DM interaction but frustration in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice. In the model, the breathing bond-alternation is characterized by the ratio of the nearest-neighbor (NN) antiferromagnetic exchange interaction for large tetrahedra to that for small ones, J1'/J1. A quadruple-q state with the ordering vector of q=(\pm 1/2,\pm 1/2,\pm 1/2), which is realized for a large third NN antiferromagnetic interaction along the bond direction J3, turns out to become the hedgehog-lattice state in the breathing case of J1'/J1 <1, while in the uniform case of J1'/J1 =1, it is a collinear state favored by thermal fluctuations. It is also found that in a magnetic field, the structure of the (1/2,1/2,1/2) hedgehog lattice is changed from cubic to tetragonal, resulting in a nonzero net spin chirality which in a metalic system, should yield a characteristic topological Hall effect.
description: 16 pages, 12 figures, accepted in PRB
Information literacy in USARB syllabus
Creators: name: Mihaela, Staver
name: Răileanu Ludmila
Publisher: name: Zenodo
Year: 2019
Subjects: Information Literacy
creative potential
professional opportunities
USARB
curricula
librarians
discipline sheet

description: The authors write a bout the role of Information Literacy which is a fundamental requirement in the study and research process, the course being included in the USARB curricula. For the first year of study, the Basics of Information Literacy Course is of 30-hours (1 credit) component of general abilities and skills training and assessed through the accepted / rejected qualification. Thus, librarians, as members of the educational community, use their creative potential and professional opportunities, actively contributing to the educational process, helping students develop information skills, forming a critical thinking style appropriate to the information society requirements. This is expressed by the ability to analyze the informational environment, to adapt to the technological environment through the use of tools, remote resources, open access, obtaining the necessary skills in the training of highly qualified specialists.
"Inventur in Ökumene"
Creators: name: Beyer, Ulrich
name: Schlüter, Ulf
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 42 Nr. 3 (1993): Ökumenische Rundschau, Band 42, Heft 3
Vortex transmutation
Creators: name: Ferrando, Albert
name: Zacares, Mario
name: Garcia-March, Miguel-Angel
name: Monsoriu, Juan A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Using group theory arguments and numerical simulations, we demonstrate the possibility of changing the vorticity or topological charge of an individual vortex by means of the action of a system possessing a discrete rotational symmetry of finite order. We establish on theoretical grounds a "transmutation pass rule'' determining the conditions for this phenomenon to occur and numerically analize it in the context of two-dimensional optical lattices or, equivalently, in that of Bose-Einstein condensates in periodic potentials.
description: 4 pages, 4 figures
title: Dagstuhl Reports, Table of Contents, Volume 13, Issue 5, 2023
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: Table of Contents
subject: Frontmatter

description: Dagstuhl Reports, Table of Contents, Volume 13, Issue 5, 2023
description: DagRep, Volume 13, Issue 5, pages i-ii
Optical sum rules that relate to the potential energy of strongly correlated systems
Creators: name: Freericks, J. K.
name: Devereaux, T. P.
name: Moraghebi, M.
name: Cooper, S. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A class of sum rules for inelastic light scattering is developed. We show that the first moment of the non-resonant response provides information about the potential energy in strongly correlated systems. The polarization dependence of the sum rules provide information about the electronic excitations in different regions of the Brillouin zone. We determine the sum rule for the Falicov-Kimball model, which possesses a metal-insulator transition, and compare our results to the light scattering experiments in SmB_6.
description: (5 pages, 3 figures, typeset in ReVTeX)
Laser Nano-Filament Explosion for Enabling Open-Grating Sensing in Optical Fibre
Creators: name: Aghdami, Keivan Mahmoud
name: Rahnama, Abdullah
name: Ertorer, Erden
name: Herman, Peter R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Embedding strong photonic stopbands into traditional optical fibre that can directly access and sense the outside environment is challenging, relying on tedious nanoprocessing steps that result in fragile thinned fibre. Ultrashort pulsed laser filaments have recently provided a non contact means of opening high aspect ratio nanoholes inside of bulk transparent glasses. This method has been extended here to optical fibre, resulting in high density arrays of laser filamented holes penetrating transversely through the silica cladding and guiding core to provide high refractive index contrast Bragg gratings in the telecommunication band. The point by point fabrication was combined with post-chemical etching to engineer strong photonic stopbands directly inside of the compact and flexible fibre. Fibre Bragg gratings with sharply resolved pi-shifts are presented for high resolution refractive index sensing from n = 1 to 1.67 as the nano-holes were readily wetted and filled with various solvents and oils through an intact fibre cladding.
description: 21 pages, 12 figures
Transient Resonant Auger-Meitner Spectra of Photoexcited Thymine
Creators: name: Wolf, Thomas J. A.
name: Paul, Alexander C.
name: Folkestad, Sarai D.
name: Myhre, Rolf H.
name: Cryan, James P.
name: Berrah, Nora
name: Bucksbaum, Phil H.
name: Coriani, Sonia
name: Coslovich, Giacomo
name: Feifel, Raimund
name: Martinez, Todd J.
name: Moeller, Stefan P.
name: Mucke, Melanie
name: Obaid, Razib
name: Plekan, Oksana
name: Squibb, Richard J.
name: Koch, Henrik
name: Gühr, Markus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present the first investigation of excited state dynamics by resonant Auger-Meitner spectroscopy (also known as resonant Auger spectroscopy) using the nucleobase thymine as an example. Thymine is photoexcited in the UV and probed with X-ray photon energies at and below the oxygen K-edge. After initial photoexcitation to a ππ* excited state, thymine is known to undergo internal conversion to an nπ* excited state with a strong resonance at the oxygen K-edge, red-shifted from the ground state π* resonances of thymine (see our previous study Wolf et al., Nat. Commun., 2017, 8, 29). We resolve and compare the Auger-Meitner electron spectra associated both with the excited state and ground state resonances, and distinguish participator and spectator decay contributions. Furthermore, we observe simultaneously with the decay of the nπ* state signatures the appearance of additional resonant Auger-Meitner contributions at photon energies between the nπ* state and the ground state resonances. We assign these contributions to population transfer from the nπ* state to a ππ* triplet state via intersystem crossing on the picosecond timescale based on simulations of the X-ray absorption spectra in the vibrationally hot triplet state. Moreover, we identify signatures from the initially excited ππ* singlet state which we have not observed in our previous study.
The polarisation signature from microlensing of circumstellar envelopes in caustic crossing events
Creators: name: Ignace, R.
name: Bjorkman, J. E.
name: Bryce, H. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The high gradient of magnification across the source during both small impact parameter events and caustic crossings offers a unique opportunity for determining the surface brightness profile of the source. Furthermore, models indicate that these events can also provide an appreciable polarisation signal -- arising from differential magnification across the otherwise symmetric source. In a previous paper, polarimetric variations from point lensing of a circumstellar envelope were considered, as would be suitable for an extended envelope around a red giant. In this work we examine the polarisation in the context of caustic crossing events, the scenario which represents the most easily accessible situation for actually observing a polarisation signal in Galactic microlensing.
description: accepted to MNRAS
RHESSI Spectral Fits of Swift GRBs
Creators: name: Bellm, Eric C.
name: Bandstra, Mark E.
name: Boggs, Steven E.
name: Hajdas, Wojtek
name: Hurley, Kevin
name: Smith, David M.
name: Wigger, Claudia
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One of the challenges of the Swift era has been accurately determining Epeak for the prompt GRB emission. RHESSI, which is sensitive from 30 keV to 17 MeV, can extend spectral coverage above the Swift-BAT bandpass. Using the public Swift data, we present results of joint spectral fits for 26 bursts co-observed by RHESSI and Swift-BAT through May 2007. We compare these fits to estimates of Epeak which rely on BAT data alone. A Bayesian Epeak estimator gives better correspondence with our measured results than an estimator relying on correlations with the Swift power law indices.
description: 4 pages, 1 figure. To appear in the proceedings of Gamma Ray Bursts 2007, Santa Fe, New Mexico, November 5-9 2007
Optically controlled polariton condensate molecules
Creators: name: Cherotchenko, E. D.
name: Sigurdsson, H.
name: Askitopoulos, A.
name: Nalitov, A. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A condensed matter platform for analogue simulation of complex two-dimensional molecular bonding configurations, based on optically trapped exciton-polariton condensates is proposed. The stable occupation of polariton condensates in the excited states of their optically configurable potential traps permits emulation of excited atomic orbitals. A classical mean field model describing the dissipative coupling mechanism between p-orbital condensates is derived, identifying lowest threshold condensation solutions as a function of trap parameters corresponding to bound and antibound $π$ and $σ$ bonding configurations, similar to those in quantum chemistry.
Lifetime of a transient atmosphere produced by Lunar Volcanism
Creators: name: Tucker, Orenthal J.
name: Killen, Rosemary M.
name: Johnson, Robert E.
name: Saxena, Prabal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Early in the Moon's history volcanic outgassing may have produced a periodic millibar level atmosphere (Needham and Kring, 2017). We examined the relevant atmospheric escape processes and lifetime of such an atmosphere. Thermal escape rates were calculated as a function of atmospheric mass for a range of temperatures including the effect of the presence of a light constituent such as H2. Photochemical escape and atmospheric sputtering were calculated using estimates of the higher EUV and plasma fluxes consistent with the early Sun. The often used surface Jeans calculation carried out in Vondrak (1974) is not applicable for the scale and composition of the atmosphere considered. We show that solar driven non-thermal escape can remove an early CO millibar level atmosphere on the order of 1 Myr if the average exobase temperature is below 350 - 400 K. However, if solar UV/EUV absorption heats the upper atmosphere to temperatures > 400 K thermal escape increasingly dominates the loss rate, and we estimated a minimum lifetime of 100's of years considering energy limited escape.
description: Submitted to Icarus
Analytical protostellar disk models 1: the effect of internal dissipation and surface irradiation on the structure of disks and the location of the snow line around Sun-like stars
Creators: name: Garaud, Pascale
name: Lin, Douglas N. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We construct a new set of self-consistent analytical disk models by taking into account both viscous and radiative sources of thermal energy. We analyze the non-isothermal structure of the disk across the mid-plane for optically thick disks, and use the standard two-temperature model in the case of optically thin disks. We deduce a set of general formula for the relationship between the mass accretion rate and the surface density profile. Our results recover those of Chiang & Goldreich in the optically thin regions, but extend their work for the opaque regions of the disk. For the purpose of illustration, we apply our theory in this paper to determine the structure of protostellar disks around T Tauri stars under a state of steady accretion and derive the corresponding radial distribution function of various disk properties such as surface density and temperature near the mid-plane. We calculate the position of the snow line around a sun-like T Tauri star, and deduce that it can evolve from well outside 10 AU during FU Orionis outbursts, to about 4 AU during passive accretion phase, to the present-day orbital radius of Venus and finally re-expand to over 2.2 AU during the protostellar- to-debris disk transition. This non-monotonous evolution of the snow line may provide some novel and deterministic explanation for the total water content and its isotopic composition of both Venus and the Earth. In the optically thin, outermost regions of the disk we find that the surface density profile of the dust varies roughly as 1/r, which is consistent with mm observations of spatially resolved disk of Mundy et al. (2000).
description: 19 pages, 8 figures. Submitted to ApJ
L’imaginaire alimentaire dans les romans de Zola : une analyse de L’Assommoir et de La Curee
Creators: name: Dusing, Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: Le XIXe siècle marque l'apogée et de la cuisine française et du roman français. La nourriture apparaît régulièrement comme thème secondaire dans la fiction de l'époque et à cet égard nous considérons sa signification dans les Rougon-Macquart d'Emile Zola, portant notre attention sur trois romans particulièrement représentatifs de la série: La Curée, L'Assommoir et Le Ventre de Paris. Avec l'ascension de la société consommatrice et bourgeoise post-révolutionnaire, l'acte de manger se transformait en spectacle pour ainsi dire, un moyen d'étaler sa réussite socio-économique. Non seulement la nourriture et la manière dont elle était servie à et consommée par certaines classes pouvaient-elles symboliser la richesse et le statut social, elles pouvaient aussi indiquer le contraire: la pauvreté et le besoin. Représenter les iniquités vastes qui séparaient les classes est un des traits dominants de la littérature réaliste du XIXe siècle. Comme la nourriture pouvait symboliser l'abîme divisant riches et pauvres, pour l'écrivain la nourriture et sa consommation étaient de grand intérêt pour définir le contexte social de son personnage littéraire et pour renseigner sur sa volonté d'être ou de devenir, sur les catégories archétypales d'une vie, d'un système, d'une société, d'une oeuvre. Zola arrive à lier l'appétit aux pulsions identitaires transformant le vocabulaire associé au discours alimentaire en un répertoire de métaphores qui se réfèrent aux appétits pour l'argent, la chair, la gloire, le pouvoir ou le savoir. Ces appétits sont caractéristiques du Second Empire, une période de décadence où régnait, d'après Zola, l'excès, l'avarice et la corruption. Là-dedans se retrouvent ses propres traductions de la condition de ses personnages en une idéologie basée sur 1'appétit ou la confusion des appétits. Le thème sous-jacent du "cannibalisme" — la manifestation la plus extrême de cette confusion -- en est un exemple qui présente la question darwinienne de manger ou d'être mangé sous forme de la lutte éternelle entre les Gras et les Maigres. Zola développe ainsi une nouvelle mythologie, celle de la "bête-humaine" dans laquelle il réduit l'homme à son état naturel et primitif où domine le besoin humain le plus fondamental: celui de manger.
Approximate Killing symmetries in non-perturbative quantum gravity
Creators: name: Brunekreef, Joren
name: Reitz, Marcus
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is an open question whether fluctuations at the Planck scale in a non-perturbative theory of quantum gravity behave in such a way that the resulting semi-classical geometry can be modelled by a space that admits (approximate) Killing symmetries. We have investigated whether the notion of approximate Killing vector fields is suitable to address this question in lattice theories of quantum gravity, such as (Causal) Dynamical Triangulations. We show that it is possible to construct quantum observables related to approximate Killing vector fields using the framework of Discrete Exterior Calculus. We have evaluated the expectation value of one particular choice of observable on three toy models of two-dimensional quantum gravity.
description: 39 pages, 15 figures
An Integrated Analysis with Predictions on the Architecture of the tau Ceti Planetary System, Including a Habitable Zone Planet
Creators: name: Dietrich, Jeremy
name: Apai, Dániel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: tau Ceti is the closest single Sun-like star to the solar system and hosts a multi-planet system with four confirmed planets. The possible presence of additional planets, especially potentially habitable worlds, remains of great interest. We analyze the structure of the tau Ceti planetary system via the DYNAMITE algorithm, combining information from exoplanet population statistics and orbital dynamics with measurements of this specific system. We also expand DYNAMITE to incorporate radial velocity information. Our analysis suggests the presence of four additional planets, three of which match closely with the periods of three tentative planet candidates reported previously. We also predict at least one more planet candidate with an orbital period between $\sim270-470$ days, in the habitable zone for tau Ceti. Based on the measured $m \sin i$ values of the confirmed planets, we also assess the possible masses and nature of the detected and undetected planets. The least massive planets and candidates are likely to be rocky, while the other planets and candidates could either be rocky or contain a significant gaseous envelope. The RV observable signature from the predicted habitable zone planet candidate would likely be at or just above the noise level in current data, but should be detectable in future extremely high-precision radial velocity and direct imaging studies.
description: 15 pages, 4 figures, accepted to AJ
Birkhoff's theorem in Lovelock gravity
Creators: name: Zegers, Robin
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the generic solutions of the Lovelock equations with spherical, planar or hyperbolic symmetry are locally isometric to the corresponding static Lovelock black hole. As a consequence, these solutions are locally static: they admit an additional Killing vector that can either be space-like or time-like, depending on the position. This result also holds in the presence of an abelian gauge field, in which case the solutions are locally isometric to a charged static black hole.
description: 5 pages
Lexical elicitation: Trouble words from one-on-one elicitations
Creators: name: Sales, Henry
name: Garvin, Karee
name: Hermalin, Noah
name: Melguy, Yevgeniy
name: Michael, Lev
name: Scott, Tessa
name: Wilbanks, Eric
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: mam

description: Lead elicitor: Eric Wilbanks. Scribe: Karee Garvin. Clean copy: Yevgeniy Melguy.
Relativistic mechanics of neutron superfluid in (magneto) elastic star crust
Creators: name: Carter, Brandon
name: Samuelsson, Lars
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: At densities below the neutron drip threshold, a purely elastic solid model (including, if necessary, a frozen-in magnetic field) can provide an adequate description of a neutron star crust, but at higher densities it will be necessary to allow for the penetration of the solid lattice by an independently moving current of superfluid neutrons. In order to do this, the previously available category of relativistic elasticity models is combined here with a separately developed category of relativistic superfluidity models in a unified treatment based on the use of an appropriate Lagrangian master function. As well as models of the purely variational kind, in which the vortices flow freely with the fluid, such a master function also provides a corresponding category of non-dissipative models in which the vortices are pinned to the solid structure.
description: 29 pages, Latex. V. 2. Minor changes, matches published version
Nutritional Support in Critically Ill Patients: The Challenges of Nurses role.
Creators: name: Pirunnapa Benyapad
name: Pongpol Kongsaman
Publisher: name: Text and Journal Publication
Year: 2019
Subjects: Nutritional support
Critically ill
Nutrition screening and tool
Role 'nurses

description: Vajira Medical Journal, 63, 3, -
The Evaluation of Training Program of Nursing Specialty in Family Nursing Practitioner: A study in Boromarajonani College of Nursing Sanpasithiprasong
Creators: name: Petcharat Pibanwong
name: Wilailak Teeyapan
name: Warunee Nadoon
name: Sakonsupa Apichutboonchock
name: Buntita Phuarsa
name: Lakhana Chopsiang
name: Pawinee Harasan
name: Oranit Jantasen
name: Tattapon Palachai
Publisher: name: Text and Journal Publication
Year: 2019
Subjects: perceptions
expectations
education management
medical students
lecturers
welfare

description: Vajira Medical Journal, 63, 3, -
The Cosmic Dispersion Measure in the EAGLE Simulations
Creators: name: Batten, Adam J.
name: Duffy, Alan R.
name: Wijers, Nastasha
name: Gupta, Vivek
name: Flynn, Chris
name: Schaye, Joop
name: Ryan-Weber, Emma
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The dispersion measure (DM) of fast radio bursts (FRBs) provides a unique way to probe ionised baryons in the intergalactic medium (IGM). Cosmological models with different parameters lead to different DM-redshift ($\mathrm{DM}-z$) relations. Additionally, the over/under-dense regions in the IGM and the circumgalactic medium of intervening galaxies lead to scatter around the mean $\mathrm{DM}-z$ relations. We have used the Evolution and Assembly of GaLaxies and their Environments (EAGLE) simulations to measure the mean $\mathrm{DM}-z$ relation and the scatter around it using over one billion lines-of-sight between redshifts $0
description: Submitted to MNRAS. 14 pages, 15 figures, Comments Welcome. Data and model will be released upon being accepted
The role of pole(s) in the global climate system
Creators: name: Smith, Robin
Publisher: name: Zenodo
Year: 2024

description: This presentation was given during the Reports from Cross-Cutting Theme Meetings session of the OCEAN:ICE Annual Project Meeting on September 24, 2024.

The OCEAN:ICE Annual Project Meeting was held in conjunction with the International Association for the Physical Sciences of the Oceans (IAPSO) joint event, which took place at the Danish Meteorological Institute from September 23 to 25, 2024. The joint event included OCEAN:ICE’s Annual Project Meeting (September 23–24) and a Joint OCEAN:ICE, IAPSO, JCIOI, and SOOS Workshop, ‘Reconciling Cross-Platform Observations of Ice-Shelf Melt (RECOIL)’ (September 25).
Anomalous hydrodynamics with dyonic charge
Creators: name: Nakayama, Yu
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study anomalous hydrodynamics with a dyonic charge. We show that the local second law of thermodynamics constrains the structure of the anomaly in addition to the structure of the hydrodynamic constitutive equations. In particular, we show that not only the usual $E\cdot B$ term but also $E^2 -B^2$ term should be present in the anomaly with a specific coefficient for the local entropy production to be positive definite.
description: 8 pages
Two-photon superbunching effect of broadband chaotic stationary light at femtosecond timescale based on cascaded Michelson interferometer
Creators: name: Luo, Sheng
name: Zhou, Yu
name: Zheng, Huaibin
name: Liu, Jianbin
name: Chen, Hui
name: He, Yuchen
name: Xu, Wanting
name: Zhang, Shuanghao
name: Li, Fuli
name: Xu, Zhuo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It is challenging for observing superbunching effect with true chaotic light, here we propose and demonstrate a method to achieve superbunching effect of the degree of second-order coherence is 2.42 with broadband stationary chaotic light based on a cascaded Michelson interferometer (CMI), exceeding the theoretical upper limit of 2 for the two-photon bunching effect of chaotic light. The superbunching correlation peak is measured with an ultrafast two-photon absorption detector which the full width at half maximum reaches about 95 fs. Two-photon superbunching theory in a CMI is developed to interpret the effect and is in agreement with experimental results. The theory also predicts that the degree of second-order coherence can be much greater than $2$ if chaotic light propagates $N$ times in a CMI. Finally, a new type of weak signals detection setup which employs broadband chaotic light circulating in a CMI is proposed. Theoretically, it can increase the detection sensitivity of weak signals 79 times after the chaotic light circulating 100 times in the CMI.
description: 8 pages, 5 figures
Cryptanalysis of the Hillery-Buzek-Berthiaume quantum secret-sharing protocol
Creators: name: Qin, Su-Juan
name: Gao, Fei
name: Wen, Qiao-Yan
name: Zhu, Fu-Chen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The participant attack is the most serious threat for quantum secret-sharing protocols. We present a method to analyze the security of quantum secret-sharing protocols against this kind of attack taking the scheme of Hillery, Buzek, and Berthiaume (HBB) [Phys. Rev. A 59 1829 (1999)] as an example. By distinguishing between two mixed states, we derive the necessary and sufficient conditions under which a dishonest participant can attain all the information without introducing any error, which shows that the HBB protocol is insecure against dishonest participants. It is easy to verify that the attack scheme of Karlsson, Koashi, and Imoto [Phys. Rev. A 59, 162 (1999)] is a special example of our results. To demonstrate our results further, we construct an explicit attack scheme according to the necessary and sufficient conditions. Our work completes the security analysis of the HBB protocol, and the method presented may be useful for the analysis of other similar protocols.
description: Revtex, 7 pages, 3 figures; Introduction modified
Ethically Collecting Multi-Modal Spontaneous Conversations with People that have Cognitive Impairments
Creators: name: Addlesee, Angus
name: Albert, Pierre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: In order to make spoken dialogue systems (such as Amazon Alexa or Google Assistant) more accessible and naturally interactive for people with cognitive impairments, appropriate data must be obtainable. Recordings of multi-modal spontaneous conversations with vulnerable user groups are scarce however and this valuable data is challenging to collect. Researchers that call for this data are commonly inexperienced in ethical and legal issues around working with vulnerable participants. Additionally, standard recording equipment is insecure and should not be used to capture sensitive data. We spent a year consulting experts on how to ethically capture and share recordings of multi-modal spontaneous conversations with vulnerable user groups. In this paper we provide guidance, collated from these experts, on how to ethically collect such data and we present a new system - "CUSCO" - to capture, transport and exchange sensitive data securely. This framework is intended to be easily followed and implemented to encourage further publications of similar corpora. Using this guide and secure recording system, researchers can review and refine their ethical measures.
description: Published at LREC's Workshop on Legal and Ethical Issues in Human Language Technologies 2020
Methodological and psychological predictors of the white coat effect
Creators: name: Newlove, Therese A.
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of the study was to examine psychological and methodological factors which would predict the white coat effect (WCE). The WCE is defined as the difference (mm Hg) between ambulatory and office measured blood pressure (BP). Sixty three community volunteers participated in this study. Participants were divided into 3 Response style groups: (1) Office responders had ambulatory BP values which were lower than office BP, (2) Non responders showed a minimal difference between office and ambulatory BP, and (3) Home responders had significantly higher ambulatory BP compared to office BP. Participants were asked to have a series of BP readings taken by a physician, nurse and by themselves and participate in 24 hour ambulatory monitoring. State and trait self-report psychological measures were completed. Self measured BP was the most representative of ambulatory BP for the sample as a whole, and in particular for the Home responders. State anxiety, previously dismissed as mediating factor in the expression of the white coat effect, proved to discriminate between the groups. Office responders had significantly higher levels of state anxiety, directly related to BP measurements, compared to Home and Non responders. Habituation to the experience of having BP measured by a physician, and habituation of the anxiety prior to the BP measurement, was different among the three groups. Trait psychological variables did not distinguish group membership. Self measured systolic BP, state anxiety prior to self measured BP, habituation to physician measured BP and the anxiety preceding it, were entered as predictors variables in a discriminant function analyses. These variables were able to correctly classify group membership for 63% of the sample.
Scaling, self-similar solutions and shock waves for V-shaped field potentials
Creators: name: Arodz, H.
name: Klimas, P.
name: Tyranowski, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Other Condensed Matter (cond-mat.other)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We investigate a (1+1)-dimensional nonlinear field theoretic model with the field potential $V(ϕ)| = |ϕ|.$ It can be obtained as the universal small amplitude limit in a class of models with potentials which are symmetrically V-shaped at their minima, or as a continuum limit of certain mechanical system with infinite number of degrees of freedom. The model has an interesting scaling symmetry of the 'on shell' type. We find self-similar as well as shock wave solutions of the field equation in that model.
description: Two comments and one reference added