cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the essential spectrum of Nadirashvili-Martin-Morales minimal surfaces
Creators: name: Bessa, G. Pacelli
name: Jorge, Luquesio P.
name: Montenegro, J. Fabio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C40; 53C42; 58C40

description: We show that the spectrum of a complete submanifold properly immersed into a ball of a Riemannian manifold is discrete, provided the norm of the mean curvature vector is sufficiently small. In particular, the spectrum of a complete minimal surface properly immersed into a ball of $\mathbb{R}^{3}$ is discrete. This gives a positive answer to a question of Yau.
description: This article is an improvement of an earlier version titled On the spectrum of Martin-Morales minimal surfaces. 7 pages
Model-independent analysis on $R(K^{(*)})$
Creators: name: Lee, Jong-Phil
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the lepton-universality violating $B\to K^{(*)}\ell^+\ell^-$ puzzle $R(K^{(*)})$ in a model-independent way. The branching ratio ${\rm Br}(B_s\toμ^+μ^-)$ is also considered as a main constraint. We show how the branching ratio restricts the allowed region of the parameter space, and investigate new physics effects on the electronic as well as muonic sector in $R(K^{(*)})$. Within a reasonable range of parameters we find that the new physics scale goes up to $\sim 5$ TeV, and the new physics effects on the Wilson coefficient is $-1\lesssim C_{9NP}^μ\lesssim 0$.
description: 14 pages, 7 figures
Making Sense of the Legendre Transform
Creators: name: Zia, R. K. P.
name: Redish, Edward F.
name: McKay, Susan R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics Education (physics.ed-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The Legendre transform is an important tool in theoretical physics, playing a critical role in classical mechanics, statistical mechanics, and thermodynamics. Yet, in typical undergraduate or graduate courses, the power of motivation and elegance of the method are often missing, unlike the treatments frequently enjoyed by Fourier transforms. We review and modify the presentation of Legendre transforms in a way that explicates the formal mathematics, resulting in manifestly symmetric equations, thereby clarifying the structure of the transform algebraically and geometrically. Then we bring in the physics to motivate the transform as a way of choosing independent variables that are more easily controlled. We demonstrate how the Legendre transform arises naturally from statistical mechanics and show how the use of dimensionless thermodynamic potentials leads to more natural and symmetric relations.
description: 11 pages, 3 figures
Measurement of time dependent CP asymmetry parameters in B0 meson decays to omega K0S, eta'K0, and pi0K0S
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present measurements of the time-dependent CP-violation parameters S and C in the decays omega K0S, eta'K0, reconstructed as eta'K0S and eta'K0L, and pi0K0S. The data sample corresponds to the full BABAR dataset of 467 x 10^6 BB pairs produced at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. The results are S_{omega K0S} = 0.55^{+0.26}_{-0.29} +/- 0.02, C_{omega K0S} = -0.52^{+0.22}_{-0.20} +/- 0.03, S_{eta' K0} = 0.57 +/- 0.08 +/- 0.02, C_{eta' K0} = -0.08 +/- 0.06 +/- 0.02, S_{pi0 K0S} = 0.55 +/- 0.20 +/- 0.03, and C_{pi0 K0S} = 0.13 +/- 0.13 +/- 0.03, where the first errors are statistical and the second systematic. These results are consistent with our previous measurements and the world average of sin2beta measured in B0 -> J/psi K0S.
description: 18 pages, 9 postscript figures, submitted to PRD; changes in v02 address comments of PRD referee
Channeling of Protons Through Carbon Nanotubes Embedded in Dielectric Media
Creators: name: Borka, D.
name: Mowbray, D. J.
name: Mišković, Z. L.
name: Petrović, S.
name: Nešković, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate how the dynamic polarization of the carbon atoms valence electrons affects the spatial distributions of protons channeled in the (11, 9) single-wall carbon nanotubes placed in vacuum and embedded in various dielectric media. The initial proton speed is varied between 3 and 8 a.u., corresponding to the energies between 0.223 and 1.59 MeV, respectively, while the nanotube length is varied between 0.1 and 0.8 $μ$m. The spatial distributions of channeled protons are generated using a computer simulation method, which includes the numerical solving of the proton equations of motion in the transverse plane. We show that the dynamic polarization effect can strongly affect the rainbow maxima in the spatial distributions, so as to increase the proton flux at the distances from the nanotube wall of the order of a few tenths of a nanometer at the expense of the flux at the nanotube center. While our findings are connected to the possible applications of nanosized ion beams created with the nanotubes embedded in various dielectric media for biomedical research and in materials modification, they also open the prospects of applying ion channeling for detecting and locating the atoms and molecules intercalated inside the nanotubes.
description: 18 pages, 10 figures, Accepted for publication in J. Phys. Condens. Matter
A Hybrid Learning Approach to Detecting Regime Switches in Financial Markets
Creators: name: Akioyamen, Peter
name: Tang, Yi Zhou
name: Hussien, Hussien
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Machine Learning (cs.LG)
subject: Portfolio Management (q-fin.PM)
subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Financial markets are of much interest to researchers due to their dynamic and stochastic nature. With their relations to world populations, global economies and asset valuations, understanding, identifying and forecasting trends and regimes are highly important. Attempts have been made to forecast market trends by employing machine learning methodologies, while statistical techniques have been the primary methods used in developing market regime switching models used for trading and hedging. In this paper we present a novel framework for the detection of regime switches within the US financial markets. Principal component analysis is applied for dimensionality reduction and the k-means algorithm is used as a clustering technique. Using a combination of cluster analysis and classification, we identify regimes in financial markets based on publicly available economic data. We display the efficacy of the framework by constructing and assessing the performance of two trading strategies based on detected regimes.
description: 7 pages, 5 figures, 5 tables, ICAIF 2020: ACM International Conference on AI in Finance
A Natural Two-Higgs-Doublet Model
Creators: name: Grzadkowski, B.
name: Osland, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss phenomenological consequences of requiring the cancellation of one-loop quadratic divergences in corrections to scalar masses within Two-Higgs-Doublet Models (2HDM). It is shown that the Inert Doublet Model (IDM) can not accommodate the requirement of the cancellation. A general 2HDM is also analyzed taking into account existing experimental constraints. Allowed regions in the parameter space, permitting the above cancellation, are determined. A degeneracy between masses of scalar bosons is observed for tanbeta \gsim 40. The possibility for CP violation in the scalar potential is discussed and regions of tanbeta-M_{H^\pm} with substantial amount of CP violation are determined. In order to provide a source for dark matter in a minimal manner, a scalar gauge singlet is introduced and discussed. The model allows to ameliorate the little hierarchy problem by lifting the minimal scalar Higgs boson mass and by suppressing the one-loop quadratic corrections to scalar masses. The cutoff originating from the naturality arguments is therefore lifted to \gsim 15 TeV depending on the mass of the lightest scalar.
description: 14 pages, 5 figures. v2: Title changed, version to appear in PRD
Formation of a solar filament by magnetic reconnection and coronal condensation
Creators: name: Li, Leping
name: Peter, Hardi
name: Chitta, Lakshmi Pradeep
name: Song, Hongqiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In solar filament formation mechanisms, magnetic reconnection between two sets of sheared arcades forms helical structures of the filament with numerous magnetic dips, and cooling and condensation of plasma trapped inside the helical structures supply mass to the filament. Although each of these processes, namely, magnetic reconnection and coronal condensation have been separately reported, observations that show the whole process of filament formation are rare. In this Letter, we present the formation of a sigmoid via reconnection between two sets of coronal loops, and the subsequent formation of a filament through cooling and condensation of plasma inside the newly formed sigmoid. On 2014 August 27, a set of loops in the active region 12151 reconnected with another set of loops that are located to the east. A longer twisted sigmoidal structure and a set of shorter lower-lying loops then formed. The observations coincide well with the tether-cutting model. The newly formed sigmoid remains stable and does not erupt as a coronal mass ejection. From the eastern endpoint, signatures of injection of material into the sigmoid (as brightenings) are detected, which closely outline the features of increasing emission measure at these locations. This may indicate the chromospheric evaporation caused by reconnection, supplying heated plasma into the sigmoid. In the sigmoid, thermal instability occurs, and rapid cooling and condensation of plasma take place, forming a filament. The condensations then flow bi-directionally to the filament endpoints. Our results provide a clear observational evidence of the filament formation via magnetic reconnection and coronal condensation.
description: 11 pages, 5 figures, accepted for publication in ApJL
Resistance to water uptake by conifer seedlings
Creators: name: Dosskey, Michael Gordon
Publisher: name: University of British Columbia
Year: 2010

description: Water availability for uptake by tree seedlings is determined both by the soil water potential in relation to seedling needle water potential and by the resistance to flow of water through the soil, root and stem, to the needles. This study was designed to focus principally on water uptake resistances. The effects of soil texture and tree species on this water uptake resistance were quantified through the use of an Ohm's Law model suited to water flow through the soil-plant system. The study was conducted on one-year-old potted seedlings in a controlled environment growth chamber. Needle water potential (ΨN) of Douglas-fir is not much affected by soil water potential (Ψs) down to about -2.5 MPa, where the calculated water uptake rate becomes very small. However, soil texture does significantly affect the resistance to flow into the seedling and thus affects the water uptake rate by the seedling. The total resistance to water uptake increases as the soil dries. Coarser textured soils show consistently higher water uptake resistances over the soil water potential range -0.5 to -2.5 MPa. It is inferred that differences in resistance are associated with unsaturated, hydraulic conductivity characteristics of the soil and soil-root contact. Unlike Douglas-fir, both western and mountain hemlock show a large decrease in needle water potential as the soil dries down to a Ψs of about -3.0 MPa. The water potential difference (Ψs - ΨN) for hemlocks is less where Ψs is higher than -1.8 MPa, and greater where Ψs is less than -1.8 MPa, than (Ψs - ΨN ) for Douglas-fir in these s s N experiments. Despite these differences, the resistance to water uptake for both hemlock species is much greater over the soil water potential range -0.5 to -2.5 MPa, and thus the water uptake rates are much less than for Douglas-fir with the same soil, even though root densities and root surface areas are much larger for the hemlocks. This behavior is most pronounced with mountain hemlock. These differences are thought to be related to higher tissue and (perhaps) soil-root contact resistances in the hemlock species. The soil resistance appears to be small, at least down to Ψs of about -2.0 MPa, in these experiments. However, root densities are probably much greater than one might expect in the field.
Pre-burst events of gamma-ray bursts with light speed variation
Creators: name: Zhu, Jie
name: Ma, Bo-Qiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Previous researches on high-energy photon events from gamma-ray bursts~(GRBs) suggest a light speed variation $v(E)=c(1-E/E_{\mathrm{LV}})$ with $E_{\mathrm{LV}}=3.6\times10^{17}~\mathrm{ GeV}$, together with a pre-burst scenario that hight-energy photons come out about 10 seconds earlier than low-energy photons at the GRB source. However, in the Lorentz invariance violating scenario with an energy dependent light speed considered here, high-energy photons travel slower than low-energy photons due to the light speed variation, so that they are usually detected after low-energy photons in observed GRB data. Here we find four high-energy photon events which were observed earlier than low-energy photons from Fermi Gamma-ray Space Telescope~(FGST), and analysis on these photon events supports the pre-burst scenario of high energy photons from GRBs and the energy dependence of light speed listed above.
description: 7 latex pages,4 figures, final version for publication
Application of a New Non-Linear Least Squares Velocity Curve Analysis Technique for Spectroscopic Binary Stars
Creators: name: Karami, K.
name: Mohebi, R.
name: Soltanzadeh, M. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using measured radial velocity data of nine double lined spectroscopic binary systems NSV 223, AB And, V2082 Cyg, HS Her, V918 Her, BV Dra, BW Dra, V2357 Oph, and YZ Cas, we find corresponding orbital and spectroscopic elements via the method introduced by Karami & Mohebi (2007a) and Karami & Teimoorinia (2007). Our numerical results are in good agreement with those obtained by others using more traditional methods.
description: 6 pages, 3 figures. Accepted for publication in Astrophysics & Space Science
Alternative fidelity measure for quantum states
Creators: name: Mendonca, Paulo E. M. F.
name: Napolitano, Reginaldo d. J.
name: Marchiolli, Marcelo A.
name: Foster, Christopher J.
name: Liang, Yeong-Cherng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an alternative fidelity measure (namely, a measure of the degree of similarity) between quantum states and benchmark it against a number of properties of the standard Uhlmann-Jozsa fidelity. This measure is a simple function of the linear entropy and the Hilbert-Schmidt inner product between the given states and is thus, in comparison, not as computationally demanding. It also features several remarkable properties such as being jointly concave and satisfying all of "Jozsa's axioms". The trade-off, however, is that it is supermultiplicative and does not behave monotonically under quantum operations. In addition, new metrics for the space of density matrices are identified and the joint concavity of the Uhlmann-Jozsa fidelity for qubit states is established.
description: 12 pages, 3 figures. v2 includes minor changes, new references and new numerical results (Sec. IV)
Neugriechisches Schifferlied : "Lieber Schatz" : [für 2 Stimmen und Klavier]
Creators: name: Fröhlich, Friedrich Theodor
name: Wackernagel, Wilhelm
name: Refardt, Edgar
Publisher: name: [s.n.]
Year: 1947

description: Th. Fröhlich ; [Text von] W. Wackernagel
description: Abschrift aus: Alpenrosen, 1837
description: Siehe auch kr XI 99:20
description: Geschenk 1947 *47.ab 6 Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
Geistes-Gruss : [für Bassstimme & Pianoforte] : "Hoch auf dem alten Thurme"
Creators: name: Fröhlich, Friedrich Theodor
name: Goethe, Johann Wolfgang von
Publisher: name: [s.n.]
Year: 1830

description: Th. Fröhlich : [Text] von Göthe
description: Datiert: 11.VIII.30, Aarau
description: Geschenk 1947 *47,1586 Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
Slepian-Wolf Coding Over Cooperative Relay Networks
Creators: name: Yassaee, Mohammad Hossein
name: Aref, Mohammad Reza
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper deals with the problem of multicasting a set of discrete memoryless correlated sources (DMCS) over a cooperative relay network. Necessary conditions with cut-set interpretation are presented. A \emph{Joint source-Wyner-Ziv encoding/sliding window decoding} scheme is proposed, in which decoding at each receiver is done with respect to an ordered partition of other nodes. For each ordered partition a set of feasibility constraints is derived. Then, utilizing the sub-modular property of the entropy function and a novel geometrical approach, the results of different ordered partitions are consolidated, which lead to sufficient conditions for our problem. The proposed scheme achieves operational separation between source coding and channel coding. It is shown that sufficient conditions are indeed necessary conditions in two special cooperative networks, namely, Aref network and finite-field deterministic network. Also, in Gaussian cooperative networks, it is shown that reliable transmission of all DMCS whose Slepian-Wolf region intersects the cut-set bound region within a constant number of bits, is feasible. In particular, all results of the paper are specialized to obtain an achievable rate region for cooperative relay networks which includes relay networks and two-way relay networks.
description: IEEE Transactions on Information Theory, accepted
Bruchstück für 2 Bassstimmen mit Klavier
Creators: name: Fröhlich, Friedrich Theodor
name: Oehlenschläger, Adam Gottlob
name: Lotz, Georg
Publisher: name: [s.n.]
Year: 1830

description: [Friedrich Theodor Fröhlich ; Text von Adam Oehlenschläger]
description: Fragment, letzte Bogen, datiert: 12. Febr. 30
description: Text: "Verzeiht es will mir nicht gelingen". Aus "Tordenskiold", 1. Akt (übers. von Georg Lotz)
description: Es besteht eine Unsicherheit, ob Fröhlich der Komponist des Werkes ist (keine Erwähnung des Werks in den Verzeichnissen von Nidecker und Sarbach)
description: Geschenk 1937 *37,1440 Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
Local Structure and It's Effect on The Ferromagnetic Properties of La$_{0.5}$Sr$_{0.5}$CoO$_3$ thin films}
Creators: name: Xie, C. K.
name: Budnick, J. I.
name: Hines, W. A.
name: Wells, B. O.
name: Woicik, J. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have used high-resolution Extended X-ray Absorption Fine-Structure and diffraction techniques to measure the local structure of strained La$_{0.5}$Sr$_{0.5}$CoO$_3$ films under compression and tension. The lattice mismatch strain in these compounds affects both the bond lengths and the bond angles, though the larger effect on the bandwidth is due to the bond length changes. The popular double exchange model for ferromagnetism in these compounds provides a correct qualitative description of the changes in Curie temperature $T_C$, but quantitatively underestimates the changes. A microscopic model for ferromagnetism that provides a much stronger dependence on the structural distortions is needed.
description: 4 pages, 4 figures
Der  Berghirt : [für Tenor mit Begleitung von Violoncello und Klavier] : "Wenn auf dem höchsten Fels ich steh"
Creators: name: Fröhlich, Friedrich Theodor
name: Müller, Wilhelm
Publisher: name: [s.n.]
Year: 1828

description: [Friedrich Theodor Fröhlich ; Text] von W. Müller
description: Datiert: Krams, 14.Octr 28
description: Geschenk 1937 *37,1440 Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
Self-consistent theory of molecular switching
Creators: name: Pistolesi, Fabio
name: Blanter, Yaroslav M.
name: Martin, Ivar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the model of a molecular switch comprised of a molecule with a soft vibrational degree of freedom coupled to metallic leads. In the presence of strong electron-ion interaction, different charge states of the molecule correspond to substantially different ionic configurations, which can lead to very slow switching between energetically close configurations (Franck-Condon blockade). Application of transport voltage, however, can drive the molecule far out of thermal equilibrium and thus dramatically accelerate the switching. The tunneling electrons play the role of a heat bath with an effective temperature dependent on the applied transport voltage. Including the transport-induced "heating" selfconsistently, we determine the stationary current-voltage characteristics of the device, and the switching dynamics for symmetric and asymmetric devices. We also study the effects of an extra dissipative environment and demonstrate that it can lead to enhanced non-linearities in the transport properties of the device and dramatically suppress the switching dynamics.
Proper-time evaluation of the effective action: unequal masses in the loop
Creators: name: Osipov, A. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Fock-Schwinger proper-time method is used to derive the effective action in the field theory with the chiral $U(3)\times U(3)$ symmetry explicitly broken by unequal masses of heavy particles. The one-loop effective action is presented as a series in inverse powers of heavy masses. The first two Seeley-DeWitt coefficients of this expansion are explicitly calculated. This powerful technique opens a promising avenue for studying explicit flavor symmetry breaking effects in the effective field theories.
description: 20 pages
Random geometric complexes
Creators: name: Kahle, Matthew
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 60D05, 55U10, 05C80

description: We study the expected topological properties of Cech and Vietoris-Rips complexes built on i.i.d. random points in R^d. We find higher dimensional analogues of known results for connectivity and component counts for random geometric graphs. However, higher homology H_k is not monotone when k > 0. In particular for every k > 0 we exhibit two thresholds, one where homology passes from vanishing to nonvanishing, and another where it passes back to vanishing. We give asymptotic formulas for the expectation of the Betti numbers in the sparser regimes, and bounds in the denser regimes. The main technical contribution of the article is in the application of discrete Morse theory in geometric probability.
description: 26 pages, 3 figures, final revisions, to appear in Discrete & Computational Geometry
A Framework for Simultaneously Measuring Field Densities and the High-z Luminosity Function
Creators: name: Trapp, A. C.
name: Furlanetto, Steven R.
name: Yang, Jinghong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cosmic variance from large-scale structure will be a major source of uncertainty for galaxy surveys at z > 6, but that same structure will also provide an opportunity to identify and study dense environments in the early Universe. Using a robust model for galaxy clustering, we directly incorporate large-scale densities into an inference framework that simultaneously measures the high-z (z > 6) UV luminosity function and the average matter density of each distinct volume in a survey. Through this framework, we forecast the performance of several major upcoming James Webb Space Telescope (JWST) galaxy surveys. We find that they can constrain field matter densities down to the theoretical limit imposed by Poisson noise and unambiguously identify over-dense (and under-dense) regions on transverse scales of tens of comoving Mpc. We also predict JWST will measure the luminosity function with a precision at z = 12 comparable to existing Hubble Space Telescope's constraints at z = 8 (and even better for the faint-end slope). We also find that wide-field surveys are especially important in distinguishing luminosity function models.
Radiationless energy exchange in three-soliton collisions
Creators: name: Dmitriev, Sergey V.
name: Kevrekidis, Panayotis G.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We revisit the problem of the three-soliton collisions in the weakly perturbed sine-Gordon equation and develop an effective three-particle model allowing to explain many interesting features observed in numerical simulations of the soliton collisions. In particular, we explain why collisions between two kinks and one antikink are observed to be practically elastic or strongly inelastic depending on relative initial positions of the kinks. The fact that the three-soliton collisions become more elastic with an increase in the collision velocity also becomes clear in the framework of the three-particle model. The three-particle model does not involve internal modes of the kinks, but it gives a qualitative description to all the effects observed in the three-soliton collisions, including the fractal scattering and the existence of short-lived three-soliton bound states. The radiationless energy exchange between the colliding solitons in weakly perturbed integrable systems takes place in the vicinity of the separatrix multi-soliton solutions of the corresponding integrable equations, where even small perturbations can result in a considerable change in the collision outcome. This conclusion is illustrated through the use of the reduced three-particle model.
description: 11 pages, 14 figures, submitted for publication
Polycyclic aromatic hydrocarbon processing in interstellar shocks
Creators: name: Micelotta, E. R.
name: Jones, A. P.
name: Tielens, A. G. G. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Context: PAHs appear to be an ubiquitous interstellar dust component but the effects of shocks waves upon them have never been fully investigated. Aims: To study the effects of energetic (~0.01-1 keV) ion (H, He and C) and electron collisions on PAHs in interstellar shock waves.Methods: We calculate the ion-PAH and electron-PAH nuclear and electronic interactions, above the threshold for carbon atom loss from a PAH, in 50-200 km/s shock waves in the warm intercloud medium. Results: Interstellar PAHs (Nc = 50) do not survive in shocks with velocities greater than 100 km/s and larger PAHs (Nc = 200) are destroyed for shocks with velocities greater/equal to 125 km/s. For shocks in the ~75 - 100 km/s range, where destruction is not complete, the PAH structure is likely to be severely denatured by the loss of an important fraction (20-40%) of the carbon atoms. We derive typical PAH lifetimes of the order of a few x10^8 yr for the Galaxy. These results are robust and independent of the uncertainties in some key parameters that have yet to be well-determined experimentally. Conclusions: The observation of PAH emission in shock regions implies that that emission either arises outside the shocked region or that those regions entrain denser clumps that, unless they are completely ablated and eroded in the shocked gas, allow dust and PAHs to survive in extreme environments.
description: 19 pages, 11 figures, 3 tables, typos corrected and PAH acronym in the title substituted with full name to match version published in Astronomy and Astrophysics
Heimath : [für eine Singstimme mit Begl. v. Flöte und Klavier] : "Kein schöner Land als Heimat"
Creators: name: Fröhlich, Friedrich Theodor
name: Hoffmann von Fallersleben, August Heinrich
Publisher: name: [s.n.]
Year: 1828

description: [Friedrich Theodor Fröhlich ; Text] von Hoffmann
description: Datiert: 25.VI.28
description: Geschenk 1937 *37,1440 Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
Quantum Repeaters using Coherent-State Communication
Creators: name: van Loock, Peter
name: Lütkenhaus, Norbert
name: Munro, W. J.
name: Nemoto, Kae
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate quantum repeater protocols based upon atomic qubit-entanglement distribution through optical coherent-state communication. Various measurement schemes for an optical mode entangled with two spatially separated atomic qubits are considered in order to nonlocally prepare conditional two-qubit entangled states. In particular, generalized measurements for unambiguous state discrimination enable one to completely eliminate spin-flip errors in the resulting qubit states, as they would occur in a homodyne-based scheme due to the finite overlap of the optical states in phase space. As a result, by using weaker coherent states, high initial fidelities can still be achieved for larger repeater spacing, at the expense of lower entanglement generation rates. In this regime, the coherent-state-based protocols start resembling single-photon-based repeater schemes.
description: 11 pages, 8 figures
Modeling the high-resolution emission spectra of clear and cloudy non-transiting hot Jupiters
Creators: name: Malsky, Isaac
name: Rauscher, Emily
name: Kempton, Eliza M. R.
name: Roman, Michael
name: Long, Deryl
name: Harada, Caleb K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The advent of high-resolution spectroscopy as a method for exoplanet atmospheric characterization has expanded our capability to study non-transiting planets, increasing the number of planets accessible for observation. Many of the most favorable targets for atmospheric characterization are hot Jupiters, where we expect large spatial variation in physical conditions such as temperature, wind speed, and cloud coverage, making viewing geometry important. Three-dimensional models have generally simulated observational properties of hot Jupiters assuming edge-on viewing, which neglects planets without near edge-on orbits. As the first investigation of how orbital inclination manifests in high-resolution emission spectra, we use a General Circulation Model to simulate the atmospheric structure of Upsilon Andromedae b, a non-transiting hot Jupiter. In order to accurately capture scattering from clouds, we implement a generalized two-stream radiative transfer routine for inhomogeneous multiple scattering atmospheres. We compare models with and without clouds, as cloud coverage intensifies spatial variations. Cloud coverage increases both the net Doppler shifts and the variation of the continuum flux amplitude over the course of the planet's orbit. As orbital inclination decreases, four key features also decrease in both the clear and cloudy models: 1) the average continuum flux level, 2) the amplitude of the variation in continuum with orbital phase, 3) net Doppler shifts of spectral lines, and 4) Doppler broadening in the spectra. Models capable of treating inhomogeneous cloud coverage and different viewing geometries are critical in understanding high-resolution emission spectra, enabling an additional avenue to investigate these extreme atmospheres.
description: Accepted in ApJ, 27 pages, 16 figures
Colour and baryon number fluctuation of preconfinement system in production process and T_cc structure
Creators: name: Jin, Yi
name: Li, Shi-Yuan
name: Liu, Yan-Rui
name: Qin, Qin
name: Si, Zong-Guo
name: Yu, Fu-Sheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We suggest to study the production mechanism and some details of the production properties to probe the structure of the DDpi resonance T_cc^+ recently observed by the LHCb Collaboration. If the resonance is produced as a four-quark state, one can find the corresponding finger prints via measurements on some production properties that are the same as those of Xi_cc. The reason is that a special colour connection on the interface between the perturbative and non perturbative QCD is required for these doubly-charm hadron production. On the other hand, if T_cc^+ is produced as a hadron molecule, the measurement on the momentum correlation of DD^* can be a smoking gun to make the judgement. The present data favour a compact four-quark state production via the cc diquark fragmentation.
description: 20 papges, 6 figs
Realization of high-fidelity CZ gates in extensible superconducting qubits design with a tunable coupler
Creators: name: Ye, Yangsen
name: Cao, Sirui
name: Wu, Yulin
name: Chen, Xiawei
name: Zhu, Qingling
name: Li, Shaowei
name: Chen, Fusheng
name: Gong, Ming
name: Zha, Chen
name: Huang, He-Liang
name: Zhao, Youwei
name: Wang, Shiyu
name: Guo, Shaojun
name: Qian, Haoran
name: Liang, Futian
name: Lin, Jin
name: Xu, Yu
name: Guo, Cheng
name: Sun, Lihua
name: Li, Na
name: Deng, Hui
name: Zhu, Xiaobo
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: High-fidelity two-qubits gates are essential for the realization of large-scale quantum computation and simulation. Tunable coupler design is used to reduce the problem of parasitic coupling and frequency crowding in many-qubit systems and thus thought to be advantageous. Here we design a extensible 5-qubit system in which center transmon qubit can couple to every four near-neighbor qubit via a capacitive tunable coupler and experimentally demonstrate high-fidelity controlled-phase (CZ) gate by manipulating center qubit and one near-neighbor qubit. Speckle purity benchmarking (SPB) and cross entrophy benchmarking (XEB) are used to assess the purity fidelity and the fidelity of the CZ gate. The average purity fidelity of the CZ gate is 99.69$\pm$0.04\% and the average fidelity of the CZ gate is 99.65$\pm$0.04\% which means the control error is about 0.04\%. Our work will help resovle many chanllenges in the implementation of large scale quantum systems.
description: 6 pages, 6 figures
Two dairy waste handling systems : a comparison of nitrogen balances
Creators: name: Holbek, Niels Erik
Publisher: name: University of British Columbia
Year: 2010

description: Two dairy farms on Vancouver Island, B.C., were studied to evaluate nitrogen behavior under different handling and storage conditions. The first farm (U.B.C.) spreads slurry collected daily on a year round basis, while the second (B.M.) stores its slurry in a concrete pit to land dispose under favourable conditions. Feed analysis, slurry sampling, pit profiles and soil profiles were included in the study. Results showed that the nitrogen content of the manure can be reasonably estimated from either feed nitrogen or milk production. Losses of nitrogen during collection and storage in these systems were minimal.
Abel-Jacobi maps for hypersurfaces and non commutative Calabi-Yau's
Creators: name: Kuznetsov, A.
name: Manivel, L.
name: Markushevich, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J60, 14J45, 14F05

description: It is well known that the Fano scheme of lines on a cubic 4-fold is a symplectic variety. We generalize this fact by constructing a closed p-form with p=2n-4 on the Fano scheme of lines on a (2n-2)-dimensional hypersurface Y of degree n. We provide several definitions of this form - via the Abel-Jacobi map, via Hochschild homology, and via the linkage class, and compute it explicitly for n = 4. In the special case of a Pfaffian hypersurface Y we show that the Fano scheme is birational to a certain moduli space of sheaves on a p-dimensional Calabi--Yau variety X arising naturally in the context of homological projective duality, and that the constructed form is induced by the holomorphic volume form on X. This remains true for a general non Pfaffian hypersurface but the dual Calabi-Yau becomes non commutative.
description: 34 pages; exposition of Hochschild homology expanded; references added; introduction re-written; some imrecisions, typos and the orbit diagram in the last section corrected
Personality Paints the Fibromyalgia Portrait: A Comprehensive Review
Creators: name: Cunha, Francisco
name: Santos, Iara
name: Sousa, Rui
name: Brás, João
name: Martins, Joana
name: Vaz, Rui
name: Abreu, Joana
name: Almeida, Eliana
name: Castro, Nuno
name: Andrade, Rui
name: Borges, Sandra
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2023

description: Psicosomàtica y Psiquiatría, Núm. 27 (2023): octubre-noviembre-diciembre
Per singulos dies : [für Tenor mit Begleitung von 4 Violoncelli]
Creators: name: Fröhlich, Friedrich Theodor
Publisher: name: [s.n.]
Year: 1829

description: [Friedrich Theodor Fröhlich]
description: Datiert: 21. Febr. 29
description: Geschenk 1937 *37,1440 Öffentliche Bibliothek der Universität Basel
description: Lateinisch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
title: Influence of Chain Architecture on Nanopore Accessibility in Polyelectrolyte Block‐Co‐Oligomer Functionalized Mesopores
Creators: name: Brilmayer, Robert
name: Hess, Christian
name: Andrieu‐Brunsen, Annette
Publisher: name: Wiley
Year: 2021

description: Functionalized ordered mesoporous silica materials are commonly investigated for applications such as drug release, sensing, and separation processes. Although, various homopolymer functionalized responsive mesopores are reported, little focus has been put on copolymers in mesopores. Mesoporous silica films are functionalized with responsive and orthogonally charged block-co-oligomers. Responsive 2-dimethylamino)ethyl methacrylate)-block-2-(methacryloyloxy)ethyl phosphate (DMAEMA-b-MEP) block-co-oligomers are introduced into mesoporous films using controlled photoiniferter initiated polymerization. This approach allows a very flexible charge composition design. The obtained block-co-oligomer functionalized mesopores show a complex gating behavior indicating a strong interplay between the different blocks emphasizing the strong influence of charge distribution inside mesopores on ionic pore accessibility. For example, in contrast to mesopores functionalized with zwitterionic polymers, DMAEMA-b-MEP block-co-oligomer functionalized mesopores, containing two oppositely charged blocks, do not show bipolar ion exclusion, demonstrating the influence of the chain architecture on mesopore accessibility. Furthermore, ligand binding–based selective gating is strongly influenced by this chain architecture as demonstrated by an expansion of pore accessibility states for block-co-oligomer functionalized mesopores as compared to the individual polyelectrolyte functionalization for calcium induced gating.
Blumenandacht : "Kommt der Morgen nicht gegangen" : [für eine Singstimme mit Klavierbegleitung]
Creators: name: Fröhlich, Friedrich Theodor
name: Gebauer, August
name: Refardt, Edgar
Publisher: name: [s.n.]
Year: 1941

description: Theodor Fröhlich ; [Text von August] Gebauer
description: Handschriftl. Kopie des im Nachlass H.G. Nägelis in der Zentralbibliothek Zürich befindlichen Originalmanuskriptes mit einigen Ergänzungen von Edgar Refardt
description: Geschenk 1941 *41.ab 1 Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
Lieder aus Goethes "Faust"
Creators: name: Fröhlich, Friedrich Theodor
name: Goethe, Johann Wolfgang von
name: Refardt, Edgar
Publisher: name: [s.n.]
Year: 1947

description: [Friedrich Theodor Fröhlich]
description: Zusammengestellt von Edgar Refardt
description: Nr. 1-3, siehe auch kr XI 24 IV-V / kr XI 93
description: Geschenk 1947 *47.ab 10 Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2009 Übernahme Rekatalogis. AK UB durch Medea 2002-2005
description: Digitalisierung=Digitization=Numérisation Juli 2024 TIFF
Synthetic photometry of OB star clusters with stochastically sampled IMFs: analysis of models and HST observations
Creators: name: Orozco-Duarte, Rogelio
name: Wofford, Aida
name: Vidal-García, Alba
name: Bruzual, Gustavo
name: Charlot, Stephane
name: Krumholz, Mark R.
name: Hannon, Stephen
name: Lee, Janice
name: Wofford, Timothy
name: Fumagalli, Michele
name: Dale, Daniel
name: Messa, Matteo
name: Grebel, Eva K.
name: Smith, Linda
name: Grasha, Kathryn
name: Cook, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a pilot library of synthetic NUV, U, B, V, and I photometry of star clusters with stochastically sampled IMFs and ionized gas for initial masses, $M_i=10^3$, $10^4$, and $10^5$ M$_{\odot}$; $t=1$, 3, 4, and 8 Myr; $Z=0.014$ and $Z=0.002$; and log(U$_{\rm S}$) =-2 and -3. We compare the library with predictions from deterministic models and observations of isolated low-mass ($<10^4$ M$_{\odot}$) star clusters with co-spatial compact H\2 regions. The clusters are located in NGC 7793, one of the nearest galaxies observed as part of the \hst LEGUS and H$α$-LEGUS surveys. 1) For model magnitudes that only account for the stars: a) the residual |deterministic mag - median stochastic mag| can be $\ge0.5$ mag, even for $M_i=10^5$ M$_{\odot}$; and b) the largest spread in stochastic magnitudes occurs when Wolf-Rayet stars are present. 2) For $M_i=10^5$ M$_{\odot}$: a) the median stochastic mag with gas can be $>$1.0 mag more luminous than the median stochastic magnitude without gas; and b) nebular emission lines can contribute with $>50\%$ and $>30\%$ to the total emission in the V and I bands, respectively. 3) Age-dating OB-star clusters via deterministic tracks in the U-B vs. V-I plane is highly uncertain at $Z=0.014$ for $M_i\sim10^3$ M$_{\odot}$ and $Z=0.002$ for $M_i\sim10^3-10^5$ M$_{\odot}$. 4) For low-mass clusters, the V-band extinction derived with stochastic models significantly depends on the value of log(U$_{\rm S}$). 5) The youngest clusters tend to have higher extinction. 6) The majority of clusters have multi-peaked age PDFs. 7) Finally, we discuss the importance of characterising the true variance in the number of stars per mass bin in nature.
Heterogeneous confinement in laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric fields
Creators: name: Peng, Jie
name: Hermannstädter, Claus
name: Witzany, Marcus
name: Heldmaier, Matthias
name: Wang, Lijuan
name: Kiravittaya, Suwit
name: Rastelli, Armando
name: Schmidt, Oliver G.
name: Michler, Peter
name: Bester, Gabriel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the electronic and optical properties of laterally coupled InGaAs/GaAs quantum dot molecules under lateral electric field. We find that electrons perceive the double-dot structure as a compound single object, while the holes discern two well separated dots. Through a combination of predictive atomistic modeling, detailed morphology studies, and single object micro-photoluminescence measurements, we show that this peculiar confinement results in an unusual heterogeneous behavior of electrons and holes with profound consequences on optical properties.
description: 4 pages, 4 figures; http://www.fkf.mpg.de/bester/publications/publications.html
ЛОКАТИВНОСТЬ КАК ЯЗЫКОВОЙ ФЕНОМЕН: АНГЛИЙСКИЙ И УЗБЕКСКИЙ ЯЗЫКИ В СРАВНЕНИИ
Creators: name: Нилуфар Неъматиллаевна Зубайдова Самаркандский государственный институт иностранных языков Самарканд, Узбекистан
Publisher: name: Zenodo
Year: 2025

description: В данной статье рассматривается локативность как языковой феномен, проявляющийся в английском и узбекском языках. Цель исследования заключается в анализе функционально-семантических аспектов локативных конструкций, а также в выявлении сходств и различий в их использовании в обоих языках. В статье представлены примеры локативных предлогов и конструкций, а также их семантические значения. Результаты исследования могут быть полезны для преподавателей языков и лингвистов, интересующихся вопросами пространственной семантики.

Ключевые слова: локативность, английский язык, узбекский язык, функционально-семантический анализ, пространственная семантика, языковой феномен, предлоги, сравнительный анализ