cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2
Creators: name: Baker, P. J.
name: Lancaster, T.
name: Blundell, S. J.
name: Brooks, M. L.
name: Hayes, W.
name: Prabhakaran, D.
name: Pratt, F. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report muon-spin rotation, heat capacity, magnetization, and ac magnetic susceptibility measurements of the layered spin-1/2 antiferromagnet NaNiO2. These show the onset of long-range magnetic order below T_N = 19.5K. Rapid muon depolarization persisting to about 5K above T_N is consistent with the presence of short-range magnetic order. The temperature and frequency dependence of the ac susceptibility suggests that magnetic clusters persist above 25K in the paramagnetic state and that their volume fraction decreases with increasing temperature. A frequency dependent peak in the ac magnetic susceptibility at T_sf = 3K is observed, consistent with a slowing of spin fluctuations at this temperature. A partial magnetic phase diagram is deduced.
description: 4 pages, 4 figures
Strong asymmetry of mode-locking pulses in quantum-dot semiconductor lasers
Creators: name: Radziunas, Mindaugas
name: Vladimirov, Andrei G.
name: Viktorov, Evgeny A.
name: Fiol, Gerrit
name: Schmeckebier, Holger
name: Bimberg, Dieter
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: quantum dots
subject: semiconductor laser
subject: saturable absorber
subject: mode-locking
subject: trailing edge plateaux
subject: optical mode
subject: mode decomposition
subject: 78A60
subject: 35Q60
subject: 35P10
subject: 35B30
subject: 42.55.Px
subject: 42.60.Fc
subject: 73.63.Kv
subject: 85.30.De
subject: 85.35.Be

description: We describe the formation of a strong pulse asymmetry in mode-locked quantum-dot edge-emitting two-section semiconductor lasers. A mode decomposition technique reveals the role of the superposition of different modal groups. The results of theoretical analysis are supported by experimental data.
How Online Training Events are Supporting the Development of Quantitative Data Skills in Social Science Students: a qualitative research project
Creators: name: Higgins, Vanessa
name: Carter, Jackie
Publisher: name: Zenodo
Year: 2024

description: There is international demand for quantitative data skills – with Governments increasingly concerned with how data skills are acquired for 21st Century jobs. There is evidence from data skills training initiatives that social science students can help to fill this gap (Carter, 2021a, 2021b; Tazzyman et al., 2021) but more data skills training is needed to fulfil this need. The purpose of this paper is to explore how online training events can support social science students to develop data skills. We present results from a qualitative research project using in-depth interviews with social science students who have participated in UK Data Service (UKDS) online training events. We use reflective thematic analysis (Braun & Clarke 2021) to explore how the training enhances their data literacy and helps them acquire skills that they can use in their studies and research careers. We also discuss how the results from the project are feeding back into developments in the UKDS data skills training programme.
Generalized WDVV equations for F4 pure N=2 Super-Yang-Mills theory
Creators: name: Hoevenaars, L. K.
name: Kersten, P. H. M.
name: Martini, R.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An associative algebra of holomorphic differential forms is constructed associated with pure N=2 Super-Yang-Mills theory for the Lie algebra F4. Existence and associativity of this algebra, combined with the general arguments in the work of Marshakov, Mironov and Morozov, proves that the prepotential of this theory satisfies the generalized WDVV system.
description: 7 pages
ENJEUX DE LA COMMUNAUTE INTERNATIONALE FACE AUX DEFIS DE LA DEMOCRATISATION DE LA REPUBLIQUE DEMOCRATIQUE DU CONGO
Creators: name: Pistis MBALA SINZA
name: Stanislas MUJOMBWE RASHIDI
name: Gloddy LONIA BUSUBUSU
name: Henri-Destin KAMBU KULULU
name: Christian Bayuka MANGYENGYA
Publisher: name: Zenodo
Year: 2024

description: Ce papier aborde un sujet pertinent et sensible concernant les dynamiques géopolitiques en République Démocratique du Congo. L'analyse des enjeux politiques et économiques autour de la présence des puissances étrangères est bien articulée et permet de mettre en lumière les défis auxquels fait face la RDC. Cette perspective critique est bienvenue et apporte une compréhension plus profonde des pressions internationales et de leurs impacts sur la souveraineté du pays. Cette étude traite d'une problématique actuelle et cruciale pour la République Démocratique du Congo. Le lien entre l'exploitation des ressources naturelles et la dépendance politique du pays est brillamment exposé, offrant ainsi une analyse claire et convaincante.

La présence des puissances étrangères en République Démocratique du Congo  (RDC) et des pressions de la communauté internationale face à la démocratisation du pays pourrait se justifier non seulement dans un contexte politique mais aussi économique. Il s’agit d’imposer les dirigeants qui doivent permettre aux grandes puissances d’exploiter impunément les richesses naturelles congolaises et d’imposer l’idéologie occidentale au détriment des autochtones, et cela sous les yeux impuissants des dirigeants imposés ces derniers et en considérant la RDC comme un territoire sous tutelle de l’Occident.
Role of Vector Mesons in High-Q^2 Lepton-Nucleon Scattering
Creators: name: Melnitchouk, W.
name: Thomas, A. W.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The possible role played by vector mesons in inclusive deep inelastic lepton-nucleon scattering is investigated. In the context of the convolution model, we calculate self-consistently the scaling contribution to the nucleon structure function using the formalism of time-ordered perturbation theory in the infinite momentum frame. Our results indicate potentially significant effects only when the vector meson---nucleon form factor is very hard. Agreement with the experimental antiquark distributions, however, requires relatively soft form factors for the $πN$, $ρN$ and $ωN$ vertices.
description: 22 pages, 9 figures (available upon request); accepted for publication in Phys.Rev.D, ADP-92-197/T122
Ranks and pregeometries in finite diagrams
Creators: name: Lessmann, Olivier
Publisher: name: Carnegie Mellon University
Year: 1997
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "The study of classes of models of a finite diagram was initiated by S. Shelah in 1969. A diagram D is a set of types over the empty set, and the class of models of the diagram D consists of the models of T which omit all the types not in D. In this work, we introduce a natural dependence relation on the subsets of the models for the NΓéÇ-stable case which share many of the formal properties of forking. This is achieved by considering a rank for this framework which is bounded when the diagram D is NΓéÇ-stable. We can also obtain pregeometries with respect to this dependence relation. The dependence relation is the natural one induced by the rank, and the pregeometries exist on the set of realizations of types of minimal rank. Finally, these concepts are used to generalize many of the classical results for models of a totally transcendental first-order theory. In fact, strong analogies arise: models are determined by their pregeometries or their relationship with their pregeometries; however the proofs are different, as we do not have compactness. This is illustrated with positive results (categoricity) as well as negative results (construction of nonisomorphic models)."
The Orbital Light Curve of Aquila X-1
Creators: name: Welsh, William F.
name: Robinson, Edward L.
name: Young, Patrick
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We obtained R- and I-band CCD photometry of the soft X-ray transient/neutron- star binary Aql X-1 in 1998 June while it was at quiescence. We find that its light curve is dominated by ellipsoidal variations, although the ellipsoidal variations are severely distorted and have unequal maxima. After we correct for the contaminating flux from a field star located only 0.46" away, the peak-to-peak amplitude of the modulation is ~0.25 mag in the R band, which requires the orbital inclination to be greater than 36 degrees. The orbital period we measure is consistent with the 18.95 h period measured by Chevalier & Ilovaisky (1998). During its outbursts the light curve of Aql X-1 becomes single humped. The outburst light curve observed by Garcia et al. (1999) agrees in phase with our quiescent light curve. We show that the single humped variation is caused by a ``reflection effect,'' that is, by heating of the side of the secondary star facing towards the neutron star.
description: 18 manuscript pages, 7 figures; accepted by AJ
Chaotic behavior in Casimir oscillators: A case study for phase change materials
Creators: name: Tajik, Fatemeh
name: Sedigh, Mehdi
name: Khorrami, Mohammad
name: Masoudi, Amir Ali
name: Palasantzas, George
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Casimir forces between material surfaces at close proximity of less than 200 nm can lead to increased chaotic behavior of actuating devices depending on the strength of the Casimir interaction. We investigate these phenomena for phase change materials in torsional oscillators, where the amorphous to crystalline phase transitions lead to transitions between high and low Casimir force and torque states respectively, without material compositions. For a conservative system bifurcation curve and Poincare maps analysis show the absence of chaotic behavior but with the crystalline phase (high force/torque state) favoring more unstable behavior and stiction. However, for a non-conservative system chaotic behavior can occur introducing significant risk for stiction, which is again more pronounced for the crystalline phase. The latter illustrates the more general scenario that stronger Casimir forces and torques increase the possibility for chaotic behavior. The latter is making impossible to predict whether stiction or stable actuation will occur on a long term basis, and it is setting limitations in the design of micro/nano devices operating at short range nanoscale separations.
description: 30 pages, 13 figures
On a higher order convective Cahn--Hilliard type equation
Creators: name: Korzec, Maciek D.
name: Rybka, Piotr
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: Existence theory
subject: global weak solutions
subject: Galerkin approach
subject: uniqueness
subject: small-slope approximation
subject: anisotropic surface energy
subject: coarsening
subject: 35A05
subject: 74K35
subject: 35G25

description: A convective Cahn-Hilliard type equation of sixth order that describes the faceting of a growing surface is considered with periodic boundary conditions. By using a Galerkin approach the existence of weak solutions to this sixth order partial differential equation is established in $L^2(0,T; dot H^3_per)$. Furthermore stronger regularity results have been derived and these are used to prove uniqueness of the solutions. Additionally a numerical study shows that solutions behave similarly as for the better known convective Cahn-Hilliard equation. The transition from coarsening to roughening is analyzed, indicating that the characteristic length scale decreases logarithmically with increasing deposition rate.
title: 19. Bernburger Winterseminar zu Fragen der Arznei- und Gewürzpflanzenproduktion; 17.02. - 18.02.2009; Programm, Kurzfassung der Referate und Poster, Teilnehmerliste
Creators: name: :None
Publisher: name: Verein für Arznei- und Gewürzpflanzen SALUPLANTA e. V.
Year: 2009
Subjects: subject: 630

description: Bernburger Winterseminar Arznei- und Gewürzpflanzen
title: Gemeinsame Tagung 18. Bernburger Winterseminar und 5. Fachtagung Arznei- und Gewürzpflanzen; Qualität, Wirtschaftlichkeit und Nachhaltigkeit; 18.-21. Februar 2008 in Bernburg; Tagungsband, Kurzfassungen der Vorträge und Poster
Creators: name: :None
Publisher: name: Landesanstalt für Landwirtschaft, Forsten und Gartenbau Sachsen-Anhalt
Year: 2008
Subjects: subject: 630

description: Bernburger Winterseminar Arznei- und Gewürzpflanzen
Adaptation of a compromise programming approach for evaluating the localized impacts of water allocation
Creators: name: Sarband, Ebrahim Mokallaf
name: Araghinejad, Shahab
name: Attari, Jalal
name: Ebrahimi, Kumars
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Plant Biology
subject: Computational Biology

description: Evaluating localized impacts of water allocation scenarios (WASs) is an important multi-attribute water decision problem. The impacts of WASs are not the same across a basin, and may have their own spatial variations. Conventional multi-attribute decision-making (MADM) is not capable of capturing and implementing the spatial variations. Using these methods often results in simplification or even oversimplification. Herein a new framework is developed involving a compromise programming approach (CP), fuzzy analytical hierarchy process (FAHP) and distributed indicators. The framework is applied to the Aras basin, Iran. Adaptation of the proposed framework leads to an evaluation of WASs based on their integrated localized impacts and spatial trade-offs. Results show that using lumped indicators rather than distributed indicators imposes significant uncertainties in the evaluation process. Applying CP, distributed indicators and fuzzy weights simultaneously extended the interval with stable ranking and allowed the determination of regional overall priorities and optimal spatial water allocation.
title: 17. Bernburger Winterseminar zu Fragen der Arznei- und Gewürzpflanzenproduktion; 20.02.-21.02.2007; Programm, Kurzfassung der Referate und Poster, Teilnehmerliste
Creators: name: :None
Publisher: name: Verein für Arznei- und Gewürzpflanzen SALUPLANTA e. V.
Year: 2007
Subjects: subject: 630

description: Bernburger Winterseminar Arznei- und Gewürzpflanzen
Randomly colouring random graphs
Creators: name: Dyer, Martin
name: Frieze, Alan
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: We consider the problem of generating a coloring of the random graph n,p uniformly at random using a natural Markov chain algorithm: the Glauber dynamics. We assume that there are βΔ colors available, where Δ is the maximum degree of the graph, and we wish to determine the least β = β(p) such that the distribution is close to uniform in O(n log n) steps of the chain. This problem has been previously studied for n,p in cases where np is relatively small. Here we consider the “dense” cases, where np ε [ω ln n, n] and ω = ω(n) ∞. Our methods are closely tailored to the random graph setting, but we obtain considerably better bounds on β(p) than can be achieved using more general techniques.
On defectivity of families of full-dimensional point configurations
Creators: name: Borger, Christopher
name: Nill, Benjamin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 52B20, 52A39, 14M25

description: The mixed discriminant of a family of point configurations can be considered as a generalization of the $A$-discriminant of one Laurent polynomial to a family of Laurent polynomials. Generalizing the concept of defectivity, a family of point configurations is called defective if the mixed discriminant is trivial. Using a recent criterion by Furukawa and Ito we give a necessary condition for defectivity of a family in the case that all point configurations are full-dimensional. This implies the conjecture by Cattani, Cueto, Dickenstein, Di Rocco and Sturmfels that a family of $n$ full-dimensional configurations in $\mathbb{Z}^n$ is defective if and only if the mixed volume of the convex hulls of its elements is $1$.
description: 7 pages
Additional file 1 of Neurally adjusted ventilatory assist and proportional assist ventilation both improve patient-ventilator interaction
Creators: name: Schmidt, Matthieu
name: Kindler, Felix
name: Cecchini, Jérôme
name: Poitou, Tymothée
name: Morawiec, Elise
name: Persichini, Romain
name: Similowski, Thomas
name: Demoule, Alexandre
Publisher: name: figshare
Year: 2021
Subjects: Space Science
Physical Sciences not elsewhere classified
Medicine
Molecular Biology
Biotechnology
Biological Sciences not elsewhere classified

description: Waveforms of EAdi, pressure and flow for all three modes (PSV100, NAVA100, PAV100) in the same patient.
Randomly coloring simple hypergraphs
Creators: name: Frieze, Alan
name: Pall  Melsted
Publisher: name: Carnegie Mellon University
Year: 2011
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: We study the problem of constructing a (near) uniform random proper q-coloring of a simple k-uniform hypergraph with n vertices and maximum degree ∆. (Proper in that no edge is mono-colored and simple in that two edges have maximum intersection of size one). We show that if for some α < 1 we have ∆ ≥ n α and q ≥ ∆(1+α)/kα then Glauber dynamics will become close to uniform in O(n log n) time from a random (improper) start. Note that for k > 1 + α −1 we can take q = o(∆).
Varieties of De Morgan monoids: minimality and irreducible algebras
Creators: name: Moraschini, T.
name: Raftery, J. G.
name: Wannenburg, J. J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: It is proved that every finitely subdirectly irreducible De Morgan monoid A (with neutral element e) is either (i) a Sugihara chain in which e covers not(e) or (ii) the union of an interval subalgebra [not(a), a] and two chains of idempotents, (not(a)] and [a), where a = (not(e))^2. In the latter case, the variety generated by [not(a), a] has no nontrivial idempotent member, and A/[not(a)) is a Sugihara chain in which not(e) = e. It is also proved that there are just four minimal varieties of De Morgan monoids. This theorem is then used to simplify the proof of a description (due to K. Swirydowicz) of the lower part of the subvariety lattice of relevant algebras. The results throw light on the models and the axiomatic extensions of fundamental relevance logics.
Modeling of compressible electrolytes with phase transition
Creators: name: Dreyer, Wolfgang
name: Giesselmann, Jan
name: Kraus, Christiane
Publisher: name: Weierstrass Institute
Year: 2014
Subjects: subject: Multi-component flow
subject: phase transition
subject: electrochemical reactions
subject: partial balances
subject: entropy principle
subject: asymptotic analysis
subject: sharp interface limit
subject: free boundary problems
subject: Poisson-Boltzmann
subject: Allen-Cahn equation
subject: Navier-Stokes system
subject: Euler system
subject: 78A57
subject: 80A17
subject: 92E20
subject: 35C20
subject: 35R35
subject: 76T10
subject: 76T30
subject: 35Q30
subject: 35Q35
subject: 76D45
subject: 76N10
subject: 76T99
subject: 76A02
subject: 80A22
subject: 82B26
subject: 34B15

description: A novel thermodynamically consistent diffuse interface model is derived for compressible electrolytes with phase transitions. The fluid mixtures may consist of N constituents with the phases liquid and vapor, where both phases may coexist. In addition, all constituents may consist of polarizable and magnetizable matter. Our introduced thermodynamically consistent diffuse interface model may be regarded as a generalized model of Allen-Cahn/Navier-Stokes/Poisson type for multi-component flows with phase transitions and electrochemical reactions. For the introduced diffuse interface model, we investigate physically admissible sharp interface limits by matched asymptotic techniques. We consider two scaling regimes, i.e. a non-coupled and a coupled regime, where the coupling takes place between the smallness parameter in the Poisson equation and the width of the interface. We recover in the sharp interface limit a generalized Allen-Cahn/Euler/Poisson system for mixtures with electrochemical reactions in the bulk phases equipped with admissible interfacial conditions. The interfacial conditions satisfy, for instance, a generalized Gibbs-Thomson law and a dynamic Young-Laplace law.
Transient radiation from a circular string of dipoles excited at superluminal velocity
Creators: name: Arkhipov, Rostislav M.
name: Arkhipov, Mikhail V.
name: Babushkin, Ihar
name: Tolmachev, Yurii A.
Publisher: name: Weierstrass Institute
Year: 2014
Subjects: subject: Cherenkov radiation
subject: ultrashort laser pulse
subject: superliminal motions
subject: optical Bloch equations
subject: 41.60.Bq
subject: 42.25.Fx
subject: 42.25.Hz
subject: 42.65.Ky

description: This paper discusses the features of transient radiation from periodic one-dimensional resonant medium excited by ultrashort pulse. The case of circular geometry is considered for the harmonic distribution of the density of the particles along the circle. It is shown that a new frequency component arises in the spectrum of the scattered radiation in addition to the resonance frequency of medium. The new frequency appears both in the case of linear and nonlinear interaction, its value depends on the velocity of excitation pulse propagation and on the period of spatial modulation. In addition, the case when excitation moves at superluminal velocity and Cherenkov radiation arises is also studied.
How robust is the evidence for beneficial hydrological effects of urban tree planting?
Creators: name: Baker, Henry J.
name: Hutchins, Michael G.
name: Miller, James D.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Sustainable urban water management initiatives are increasingly required to combat rapid urbanization and climate pressures. Initiatives include the role of tree planting, for which there is a need for strong evidence of benefits and drawbacks to support effective future planning. We report on the robustness of evidence from an assimilated database of urban hydrological impact studies which often had differing primary purposes. Consistent impacts were found at the local level, with trees reducing runoff and infiltration. Despite the consistency of evidence, much is undermined by the studies being somewhat lacking in robustness and scientific rigour. Many studies lack adequate controls, and models are often not strongly tested against observations. Moreover, evidence of impact at larger scales is lacking. Effects of tree characteristics were also investigated, such as maturity and species (for which evidence is consistent and detailed) and arrangement (for which there is less evidence). Realizing the full potential of trees in urban water management decision-making would benefit from more rigorous evidence.
Randomly coloring constant degree graphs
Creators: name: Dyer, Martin
name: Frieze, Alan
name: Hayes, Thomas P.
name: Vigoda, Eric
Publisher: name: Carnegie Mellon University
Year: 2013
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: We study a simple Markov chain, known as the Glauber dynamics, for generating a random k -coloring of an n -vertex graph with maximum degree Δ. We prove that, for every ε > 0, the dynamics converges to a random coloring within O(nlog n) steps assuming k ≥ k0(ε) and either: (i) k/Δ > α* + ε where α*≈ 1.763 and the girth g ≥ 5, or (ii) k/Δ >β * + ε where β*≈ 1.489 and the girth g ≥ 7. Our work improves upon, and builds on, previous results which have similar restrictions on k/Δ and the minimum girth but also required Δ = Ω (log n). The best known result for general graphs is O(nlog n) mixing time when k/Δ > 2 and O(n2) mixing time when k/Δ > 11/6. Related results of Goldberg et al apply when k/Δ > α* for all Δ ≥ 3 on triangle-free “neighborhood-amenable” graphs
Existence of bounded discrete steady state solutions of the van Roosbroeck system with monotone Fermi--Dirac statistic functions
Creators: name: Gärtner, Klaus
Publisher: name: Weierstrass Institute
Year: 2014
Subjects: subject: generalized Scharfetter--Gummel scheme
subject: Fermi--Dirac statistics
subject: generalized Einstein relation
subject: dissipativity
subject: bounded discrete steady state solutions
subject: unique thermodynamic equilibrium
subject: degenerate semiconductors
subject: 65N08
subject: 65N12
subject: 35J55

description: If the statistic function is modified, the equations can be derived by a variational formulation or just using a generalized Einstein relation. In both cases a dissipative generalization of the Scharfetter-Gummel scheme citeSch_Gu, understood as a one-dimensional constant current approximation, is derived for strictly monotone coefficient functions in the elliptic operator $nabla cdot bal ff(v) nabla $, $v$ chemical potential, while the hole density is defined by $p=cal F(v)le e^v.$ A closed form integration of the governing equation would simplify the practical use, but mean value theorem based results are sufficient to prove existence of bounded discrete steady state solutions on any boundary conforming Delaunay grid. These results hold for any piecewise, continuous, and monotone approximation of $bal ff(v)$ and $cal F(v)$.
title: Introduction_Manuel à l'usage des candidats au brevet colombophile militaire et des jeunes amateurs colombophiles
Creators: name: AmateurS
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Introduction
description: ID_PARA_00578
Varieties of De Morgan monoids: covers of atoms
Creators: name: Moraschini, T.
name: Raftery, J. G.
name: Wannenburg, J. J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: The variety DMM of De Morgan monoids has just four minimal subvarieties. The join-irreducible covers of these atoms in the subvariety lattice of DMM are investigated. One of the two atoms consisting of idempotent algebras has no such cover; the other has just one. The remaining two atoms lack nontrivial idempotent members. They are generated, respectively, by 4-element De Morgan monoids C4 and D4, where C4 is the only nontrivial 0-generated algebra onto which finitely subdirectly irreducible De Morgan monoids may be mapped by non-injective homomorphisms. The homomorphic pre-images of C4 within DMM (together with the trivial De Morgan monoids) constitute a proper quasivariety, which is shown to have a largest subvariety U. The covers of the variety V(C4) within U are revealed here. There are just ten of them (all finitely generated). In exactly six of these ten varieties, all nontrivial members have C4 as a retract. In the varietal join of those six classes, every subquasivariety is a variety-in fact, every finite subdirectly irreducible algebra is projective. Beyond U, all covers of V(C4) [or of V(D4)] within DMM are discriminator varieties. Of these, we identify infinitely many that are finitely generated, and some that are not. We also prove that there are just 68 minimal quasivarieties of De Morgan monoids.
A large magnetic storage ring for Bose-Einstein condensates
Creators: name: Arnold, A. S.
name: Garvie, C. S.
name: Riis, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Cold atomic clouds and Bose-Einstein condensates have been stored in a 10cm diameter vertically-oriented magnetic ring. An azimuthal magnetic field enables low-loss propagation of atomic clouds over a total distance of 2m, with a heating rate of less than 50nK/s. The vertical geometry was used to split an atomic cloud into two counter-rotating clouds which were recombined after one revolution. The system will be ideal for studying condensate collisions and ultimately Sagnac interferometry.
description: 4 pages, 5 figures
Looking for event horizons using UV/IR relations
Creators: name: Gregory, James P.
name: Ross, Simon F.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A primary goal in holographic theories of gravity is to study the causal structure of spacetime from the field theory point of view. This is a particularly difficult problem when the spacetime has a non-trivial causal structure, such as a black hole. We attempt to study causality through the UV/IR relation between field theory and spacetime quantities, which encodes information about bulk position. We study the UV/IR relations for charged black hole spacetimes in the AdS/CFT correspondence. We find that the UV/IR relations have a number of interesting features, but find little information about the presence of a horizon in the bulk. The scale of Wilson loops is simply related to radial position, whether there is a horizon or not. For time-dependent probes, the part of the history near the horizon only effects the late-time behaviour of field theory observables. Static supergravity probes have a finite scale size related to radial position in generic black holes, but there is an interesting logarithmic divergence as the temperature approaches zero.
description: 22 pages, 5 figures; references added
Additional file 2 of Neurally adjusted ventilatory assist and proportional assist ventilation both improve patient-ventilator interaction
Creators: name: Schmidt, Matthieu
name: Kindler, Felix
name: Cecchini, Jérôme
name: Poitou, Tymothée
name: Morawiec, Elise
name: Persichini, Romain
name: Similowski, Thomas
name: Demoule, Alexandre
Publisher: name: figshare
Year: 2021
Subjects: Space Science
Physical Sciences not elsewhere classified
Medicine
Molecular Biology
Biotechnology
Biological Sciences not elsewhere classified

description: Definitions of patient- ventilator interaction indices and the main asynchronies collected.
Groundwater recharge from heavy rainfall in the southwestern Lake Chad basin: evidence from isotopic observations
Creators: name: Goni, Ibrahim Baba
name: Taylor, Richard G.
name: Favreau, Guillaume
name: Shamsudduha, Mohammad
name: Nazoumou, Yahaya
name: Ngatcha, Benjamin Ngounou
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Marine Biology

description: We examine groundwater recharge processes and their relationship to rainfall intensity in the semi-arid, southwestern Lake Chad Basin of Nigeria using a newly compiled database of stable-isotope data (δ2H, δ18O) from groundwater and rainfall. δ18O signatures in groundwater proximate to surface waters are enriched in 18O relative to regional rainfall and trace focused groundwater recharge from evaporated waters via ephemeral river discharge and Lake Chad; groundwater remote from river channels is comparatively depleted and associated with diffuse recharge, often via sand dunes. Stable-isotope ratios of O and H (δ2H, δ18O) in groundwater samples regress to a value along the local meteoric waterline that is depleted relative to weighted mean composition of rainfall, consistent with rainfall exceeding the 60th percentile of monthly precipitation intensity. The observed bias in groundwater recharge to heavy monthly rainfall suggests that the intensification of tropical rainfall under global warming favours groundwater recharge in this basin.
The Hunt for Red Quasars: Luminous Obscured Black Hole Growth Unveiled in the Stripe 82 X-ray Survey
Creators: name: LaMassa, Stephanie M.
name: Glikman, Eilat
name: Brusa, Marcella
name: Rigby, Jane R.
name: Ananna, Tonima Tasnim
name: Stern, Daniel
name: Lira, Paulina
name: Urry, C. Megan
name: Salvato, Mara
name: Alexandroff, Rachael
name: Allevato, Viola
name: Cardamone, Carolin
name: Civano, Francesca
name: Coppi, Paolo
name: Farrah, Duncan
name: Komossa, S.
name: Lanzuisi, Giorgio
name: Marchesi, Stefano
name: Richards, Gordon
name: Trakhtenbrot, Benny
name: Treister, Ezequiel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present results of a ground-based near-infrared campaign with Palomar TripleSpec, Keck NIRSPEC, and Gemini GNIRS to target two samples of reddened active galactic nucleus (AGN) candidates from the 31 deg$^2$ Stripe 82 X-ray survey. One sample, which is $\sim$89\% complete to $K<16$ (Vega), consists of eight confirmed AGNs, four of which were identified with our follow-up program, and is selected to have red $R-K$ colors ($>4$, Vega). The fainter sample ($K>17$, Vega) represents a pilot program to follow-up four sources from a parent sample of 34 that are not detected in the single-epoch SDSS catalog and have {\it WISE} quasar colors. All twelve sources are broad-line AGNs (at least one permitted emission line has a FWHM exceeding 1300 km s$^{-1}$) and span a redshift range $0.59 < z < 2.5$. Half the ($R-K$)-selected AGNs have features in their spectra suggestive of outflows. When comparing these sources to a matched sample of blue Type 1 AGNs, we find the reddened AGNs are more distant ($z > 0.5$) and a greater percentage have high X-ray luminosities ($L_{\rm X,full} > 10^{44}$ erg s$^{-1}$). Such outflows and high luminosities may be consistent with the paradigm that reddened broad-line AGNs represent a transitory phase in AGN evolution as described by the major merger model for black hole growth. Results from our pilot program demonstrate proof-of-concept that our selection technique is successful in discovering reddened quasars at $z > 1$ missed by optical surveys.
description: 22 pages, 14 figures, 9 tables. Accepted for publication in ApJ
Randomized greedy matching
Creators: name: Dyer, Martin
name: Frieze
Publisher: name: Carnegie Mellon University
Year: 1990
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "We consider a randomized version of the usual greedy algorithm for finding a large matching in a graph. We assume that the next edge is randomly chosen from those remaining at any stage. We analyse the expected performance of this algorithm when the input graph is fixed. We show that there are graphs for which this Randomized Greedy Algorithm (RGA) usually only obtains a matching close in size to that guaranteed by worst-case analysis (i.e. half the size of the maximum). For some classes of sparse graphs (e.g. planar graphs and forests) we prove that randomization does produce an improvement over the worst-case, the ratios to maximum being at least 6/11 and 0.76┬╖┬╖┬╖ respectively."
Giant optical nonlinearities from Rydberg-excitons in semiconductor microcavities
Creators: name: Walther, Valentin
name: Johne, Robert
name: Pohl, Thomas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The realization of exciton-polaritons -- hybrid excitations of semiconductor quantum well excitons and cavity photons -- has been of great technological and scientific significance. In particular, the short-range collisional interaction between excitons has enabled explorations into a wealth of nonequilibrium and hydrodynamical effects that arise in weakly nonlinear polariton condensates. Yet, the ability to enhance optical nonlinearities would enable quantum photonics applications and open up a new realm of photonic many-body physics in a scalable and engineerable solid-state environment. Here we outline a route to such capabilities in cavity-coupled semiconductors by exploiting the giant interactions between excitons in Rydberg-states. We demonstrate that optical nonlinearities in such systems can be vastly enhanced by several orders of magnitude and induce nonlinear processes at the level of single photons.
description: 17 pages, 5 figures
Overdetermined problems for the fractional Laplacian in exterior and annular sets
Creators: name: Soave, Nicola
name: Valdinoci, Enrico
Publisher: name: Weierstrass Institute
Year: 2014
Subjects: subject: Rigidity and classification results
subject: fractional Laplacian
subject: unbounded domains
subject: overdetermined problems
subject: 35N25
subject: 35R11
subject: 35A02

description: We consider a fractional elliptic equation in an unbounded set with both Dirichlet and fractional normal derivative datum prescribed. We prove that the domain and the solution are necessarily radially symmetric. The extension of the result in bounded non-convex regions is also studied, as well as the radial symmetry of the solution when the set is a priori supposed to be rotationally symmetric.
The Astrophysical S-Factor of the Reaction $^7$be(p,$γ$)$^8$B in the Direct Capture Model
Creators: name: Krauss, H.
name: Gr"un, K.
name: Rauscher, T.
name: Oberhummer, H.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The astrophysical $S$-factor for the reaction $^7$Be(p,$γ$)$^8$B up to an energy of 2~MeV (c.m.) and the capture cross section of $^7$Li(n,$γ$)$^8$Li up to 1~MeV (c.m.) are calculated using the Direct Capture model (DC). Both calculations are in good agreement with experimental data.
description: 18 pages, 5 figures (available from author on request), Annalen der Physik in press, 1993
Epimorphisms, definability and cardinalities
Creators: name: Moraschini, T.
name: Raftery, J. G.
name: Wannenburg, J. J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: Generalizing a theorem of Campercholi, we characterize, in syntactic terms, the ranges of epimorphisms in an arbitrary class of similar first-order structures (as opposed to an elementary class). This allows us to strengthen a result of Isbell, as follows: in any prevariety having at most s non-logical symbols and an axiomatization requiring at most m variables, if the epimorphisms into structures with at most m + s + aleph0 elements are surjective, then so are all of the epimorphisms. Using these facts, we formulate and prove manageable "bridge theorems", matching the surjectivity of all epimorphisms in the algebraic counterpart of a logic L with suitable infinitary definability properties of L, while not making the standard but awkward assumption that L comes furnished with a proper class of variables.
Uniqueness for an inverse problem for a nonlinear parabolic system with an integral term by one-point Dirichlet data
Creators: name: Hömberg, Dietmar
name: Lu, Shuai
name: Yamamoto, Masahiro
Publisher: name: Weierstrass Institute
Year: 2014
Subjects: subject: inverse problem
subject: bio-heat-equation
subject: laser thermotherapy
subject: 80A22
subject: 49K20
subject: 49N45

description: We consider an inverse problem arising in laser-induced thermotherapy, a minimally invasive method for cancer treatment, in which cancer tissues is destroyed by coagulation. For the dosage planning quantitatively reliable numerical simulation are indispensable. To this end the identification of the thermal growth kinetics of the coagulated zone is of crucial importance. Mathematically, this problem is a nonlinear and nonlocal parabolic heat source inverse problem. We show in this paper that the temperature dependent thermal growth parameter can be identified uniquely from a one-point measurement.
Additional file 3 of Neurally adjusted ventilatory assist and proportional assist ventilation both improve patient-ventilator interaction
Creators: name: Schmidt, Matthieu
name: Kindler, Felix
name: Cecchini, Jérôme
name: Poitou, Tymothée
name: Morawiec, Elise
name: Persichini, Romain
name: Similowski, Thomas
name: Demoule, Alexandre
Publisher: name: figshare
Year: 2021
Subjects: Space Science
Physical Sciences not elsewhere classified
Medicine
Molecular Biology
Biotechnology
Biological Sciences not elsewhere classified

description: Example of Type II double triggering under NAVA.
Evidence of correlation in spin excitations of few-electron quantum dots
Creators: name: Garcia, Cesar Pascual
name: Pellegrini, Vittorio
name: Pinczuk, Aron
name: Rontani, Massimo
name: Goldoni, Guido
name: Molinari, Elisa
name: Dennis, Brian S.
name: Pfeiffer, Loren N.
name: West, Ken W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report inelastic light scattering measurements of spin and charge excitations in nanofabricated AlGaAs/GaAs quantum dots with few electrons. A narrow spin excitation peak is observed and assigned to the intershell triplet-to-singlet monopole mode of dots with four electrons. Configurationinteraction theory provides precise quantitative interpretations that uncover large correlation effects that are comparable to exchange Coulomb interactions.
description: 4 pages, 4 figures
On 7Li Enrichment by Low Mass Metal Poor Red Giant Branch Stars
Creators: name: de la Reza, Ramiro
name: da Silva, Licio
name: Drake, Natalia A.
name: Terra, Marco A.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: First-ascent red giants with strong and very strong Li lines have just been discovered in globular clusters. Using the stellar internal prompt 7Li enrichment - mass loss scenario, we explore the possibility of 7Li enrichment in the interstellar matter of the globular cluster M3 produced by these Li-rich giants. We found that enrichment as large as 70% or more compared to the initial 7Li content of M3 can be obtained during the entire life of this cluster. However, due to the several crossings of M3 into the Galactic plane, the new 7Li will be very probably removed by ram pressure into the disk. Globular clusters appear then as possible new sources of 7Li in the galactic disk. It is also suggested that the known Na/Al variations in stars of globular clusters could be somehow related to the 7Li variations and that the cool bottom mixing mechanism acting in the case of 7Li could also play a role in the case of Na and Al surface enrichments.
description: 8 pages, LaTeX, no figures, accepted by the Astrophys. Journal Letters
Random walks, totally unimodular matrices and a randomised dual simplex algorithm
Creators: name: Dyer, Martin
name: Frieze
Publisher: name: Carnegie Mellon University
Year: 1991
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "We discuss the application of random walks to generating a random basis of a totally unimodular matrix and to solving a linear program with such a constraint matrix. We also derive polynomial upper bounds on the combinatorial diameter of an associated polyhedron."
title: Frogstory français 01f 2009
Creators: name: Duguine, Isabelle
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2015
Subjects: subject: Français
subject: fra

description: L'enregistrement a eu lieu à la maison. L'enfant est un bilingue basque/français, de type simultané. Il a appris les 2 langues en même temps, depuis la naissance. petite section de maternelle- école immersive basque.
description: Conforms to: Format CHAT
description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
The barred inner Milky Way: dynamical models from surveys
Creators: name: Gerhard, Ortwin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Milky Way is a barred galaxy whose central bulge has a box/peanut shape and consists of multiple stellar populations with different orbit distributions. This review describes dynamical and chemo-dynamical equilibrium models for the Bulge, Bar, and inner Disk based on recent survey data. Some of the highlighted results include (i) stellar mass determinations for the different Galactic components, (ii) the need for a core in the dark matter distribution, (iii) a revised pattern speed putting corotation at ~6 kpc, (iv) the strongly barred distribution of the metal-rich stars, and (v) the radially varying dynamics of the metal-poor stars which is that of a thick disk-bar outside ~1 kpc, but changes into an inner centrally concentrated component with several possible origins. On-going and future surveys will refine this picture, making the Milky Way a unique case for studying how similar galaxies form and evolve.
description: Invited review, 9pp, 7 figures, to be published in Proceedings of IAU Symposium 334, eds. C. Chiappini, I. Minchev, E. Starkenburg & M. Valentini, Cambridge Univ Press