cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Neutral Current induced $π^0$ production and neutrino magnetic moment
Creators: name: Athar, M. Sajjad
name: Chauhan, S.
name: Singh, S. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have studied the total cross section, $Q^2$, momentum and angular distributions for pions in the $ν$($\bar ν$) induced $π^0$ production from nucleons. The calculations have been done for the weak production induced by the neutral current in the standard model and the electromagnetic production induced by neutrino magnetic moment. It has been found that with the present experimental limits on the muon neutrino magnetic moment $μ_{ν_μ}$, the electromagnetic contribution to the cross section for the $π^0$ production is small. The neutrino induced neutral current production of $π^{0}$, while giving an alternative method to study the magnetic moment of neutrino $μ_{ν_μ}$, does not provide any improvement over the present experimental limit on $μ_{ν_μ}$ from the observation of this process in future experiments at T2K and NO$ν$A.
description: 6 pages, 5 figures
The differential energy distribution and the total integrated binding energy of dynamical models
Creators: name: Baes, Maarten
name: Dejonghe, Herwig
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We revisit the differential energy distribution of steady-state dynamical models. It has been shown that the differential energy distribution of steady-state spherical models does not vary strongly with the anisotropy profile, and that it is hence mainly determined by the density distribution of the model. We explore this similarity in more detail. Through a worked example and a simple proof, we show that the mean binding energy per unit mass $\langle{\cal{E}}\rangle$, or equivalently the total integrated binding energy $B_{\text{tot}} = M\langle{\cal{E}}\rangle$, is independent of the orbital structure, not only for spherical models but for any steady-state dynamical model. Only the higher-order moments of the differential energy distribution depend on the details of the orbital structure. We show that the standard deviation of the differential energy distribution of spherical dynamical models varies systematically with the anisotropy profile: radially anisotropic models tend to prefer more average binding energies, whereas models with a more tangential orbital distribution slightly favour more extreme binding energies. Finally, we find that the total integrated binding energy supplements the well-known trio consisting of total kinetic energy, total potential energy, and total energy on an equal footing. Knowledge of any one out of these four energies suffices to calculate the other three.
description: 7 pages, 1 figure, published in A&A (653, A140)
Modular Reduction in Abstract Polytopes
Creators: name: Monson, B.
name: Schulte, Egon
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 51M20, 20F55

description: The paper studies modular reduction techniques for abstract regular and chiral polytopes, with two purposes in mind: first, to survey the literature about modular reduction in polytopes; and second, to apply modular reduction, with moduli given by primes in Z[t] (with t=τthe golden ratio), to construct new regular 4-polytopes of hyperbolic types {3,5,3} and {5,3,5} with automorphism groups given by finite orthogonal groups.
description: 16 pages; to appear in Canadian Mathematical Bulletin
MEDIAL AND BILATERAL LESIONS ARE NECESSARY FOR DEVELOPMENT OF POSTERIOR FOSSA SYNDROME IN CHILDREN
Creators: name: Shook, Devon
Publisher: name: American University
Year: 2023

description: Posterior fossa syndrome (PFS) is a well-characterized clinical syndrome arising from surgical resection of posterior fossa tumors in children that involves mutism, emotional instability and motor impairment. It is estimated that over 30% of patients develop this disorder following posterior fossa surgery, but its etiology is unknown. Of particular interest to the pathophysiology of PFS is the location of cerebellar lesions that are associated with the subsequent development of PFS. In this study, we performed an analysis of postoperative high-resolution structural magnetic resonance imaging scans of 13 pediatric patients with cerebellar tumors. The extent and location of tumor resection was traced for each subject and normalized into standard space. Surgical complications were noted and patients completed measures of behavior and affect. Patients developing PFS (N=4) and one with motor difficulties all showed a pattern of tumor resection bilaterally in the medial cerebellum, including damage to cerebellar lobules VI, IX and X. Patients who did not develop PFS did not have medial cerebellar damage, with most of the resection limited to cerebellar lobules VIIb and Crus II. These findings suggest that medial, bilateral damage is necessary for the development of PFS.
Analysis of the vagino-cervical microbiome of Chinese Women
Creators: name: HAO, Lilan
Publisher: name: CNGB
Year: 2021
Subjects: Metagenome
Environment
Environmental

description: To explore the vagino-cervical microbiome of 373 women from a local region of Suzhou, China. The relationship between vagino-cervical microbiome and factors such as menopause and contraceptive methods were also analyzed. Method Cervical samples and volunteer’s information were collected from 373 women from a local region of Suzhou, China.
Instabilities in quasiperiodic motion lead to intermittent large-intensity events in Zeeman laser
Creators: name: Kingston, S. Leo
name: Mishra, Arindam
name: Balcerzak, Marek
name: Kapitaniak, Tomasz
name: Dana, Syamal K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We report intermittent large-intensity pulses that originate in Zeeman laser due to instabilities in quasiperiodic motion, one route follows torus-doubling to chaos and another goes via quasiperiodic intermittency in response to variation in system parameters. The quasiperiodic breakdown route to chaos via torus-doubling is well known, however, the laser model shows intermittent large-intensity pulses for parameter variation beyond the chaotic regime. During quasiperiodic intermittency, the temporal evolution of the laser shows intermittent chaotic bursting episodes intermediate to the quasiperiodic motion instead of periodic motion as usually seen during the Pomeau-Manneville intermittency. The intermittent bursting appears as occasional large-intensity events. In particular, this quasiperiodic intermittency has not been given much attention so far from the dynamical system perspective, in general. In both the cases, the infrequent and recurrent large events show non-Gaussian probability distribution of event height extended beyond a significant threshold with a decaying probability confirming rare occurrence of large-intensity pulses.
description: 9 pages, 10 figures (accepted for publication in Physical Review E)
On-line Learning of an Unlearnable True Teacher through Mobile Ensemble Teachers
Creators: name: Hirama, Takeshi
name: Hukushima, Koji
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: On-line learning of a hierarchical learning model is studied by a method from statistical mechanics. In our model a student of a simple perceptron learns from not a true teacher directly, but ensemble teachers who learn from the true teacher with a perceptron learning rule. Since the true teacher and the ensemble teachers are expressed as non-monotonic perceptron and simple ones, respectively, the ensemble teachers go around the unlearnable true teacher with the distance between them fixed in an asymptotic steady state. The generalization performance of the student is shown to exceed that of the ensemble teachers in a transient state, as was shown in similar ensemble-teachers models. Further, it is found that moving the ensemble teachers even in the steady state, in contrast to the fixed ensemble teachers, is efficient for the performance of the student.
description: 18 pages, 8 figures
title:  It's Football Time in the Bluegrass!
title: The Community of UK Football Athletes & Fans and Their Shared Language & Religious Practices
titleType: Subtitle
Creators: name: Anderson, Virginia
Publisher: name: University of Kentucky Libraries
Year: 2023
Subjects: classificationCode: 6.2
subject: FOS: Languages and literature

description: This thesis observes how University of Kentucky fans and athletes create both a community and a religious experience surrounding the sport of football through their use of language. Fans and athletes took part in interviews that implicitly asked about religious experiences and community. Once the interviews were completed, they were transcribed and underwent open thematic coding. Themes were gathered from the interviews and compared to determine if the fans and athletes were separate subcommunities or if they were simply part of the at-large University of Kentucky football program community. These themes also aided in determining if and how fans and athletes create a religious experience. The determined themes confirm that there is a religious experience created by the fans and athletes and that the two groups are distinct subcommunities within the at-large community.
description: 2023 Virginia Anderson
mNGS Indicates More Precise Pathogens in patients with pulmonary infection: a retrospective study
Creators: name: 吴登峰(Dengfeng Wu)
Publisher: name: CNGB
Year: 2022
Subjects: Genome sequencing and assembly
Monoisolate

description: Timely identification of causative pathogens is always an important link for the diagnosis and treat for pulmonary infection. As a novel approach to detect the pathogens, metagenomic next-generation sequencing (mNGS) can directly sequence the nucleic acid of specimens, providing a wide range of microbial profiles. 502 patients with suspected pneumonia undergoing both mNGS of BALF and conventional microbiological tests (CMTs) were classified into different groups based on the comorbidities. The diagnostic performance was compared between mNGS and CMTs. Clinical comprehensive analysis was regarded as reference standard. The purpose of this study is to evaluate the diagnostic performance of mNGS of bronchoalveolar lavage fluid (BALF) in patients suspected with pulmonary infection.
Optical vortex coronagraphs on ground-based telescopes
Creators: name: Jenkins, Charles
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The optical vortex coronagraph is potentially a remarkably effective device, at least for an ideal unobstructed telescope. Most ground-based telescopes however suffer from central obscuration and also have to operate through the aberrations of the turbulent atmosphere. This note analyzes the performance of the optical vortex in these circumstances and compares to some other designs, showing that it performs similarly in this situation. There is a large class of coronagraphs of this general type, and choosing between them in particular applications depends on details of performance at small off-axis distances and uniformity of response in the focal plane. Issues of manufacturability to the necessary tolerances are also likely to be important.
description: 32 pages, 13 figures
Generalised thermostatistics using hyperensembles
Creators: name: Naudts, Jan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The hyperensembles, introduced by Crooks in a context of non-equilibrium statistical physics, are considered here as a tool for systems in equilibrium. Simple examples like the ideal gas, the mean-field model, and the Ising interaction on small square lattices, are worked out to illustrate the concepts.
description: Submitted to the Proceedings of CTNEXT07, 6 pages
Efficiency at maximum power of Feynman's ratchet as a heat engine
Creators: name: Tu, Z. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The maximum power of Feynman's ratchet as a heat engine and the corresponding efficiency ($η_\ast$) are investigated by optimizing both the internal parameter and the external load. When a perfect ratchet device (no heat exchange between the ratchet and the paw via kinetic energy) works between two thermal baths at temperatures $T_1> T_2$, its efficiency at maximum power is found to be $η_\ast =η_C^2 /[η_C-(1-η_C)\ln(1-η_C)]$, where $η_C\equiv 1-T_2/T_1$. This efficiency is slightly higher than the value $1-\sqrt{T_2/T_1}$ obtained by Curzon and Ahlborn [\textit{Am. J. Phys.} \textbf{43} (1975) 22] for macroscopic heat engines. It is also slightly larger than the result $η_{SS}\equiv 2η_C/(4-η_C)$ obtained by Schmiedl and Seifert [\textit{EPL} \textbf{81} (2008) 20003] for stochastic heat engines working at small temperature difference, while the evident deviation between $η_\ast$ and $η_{SS}$ appears at large temperature difference. For an imperfect ratchet device in which the heat exchange between the ratchet and the paw via kinetic energy is non-vanishing, the efficiency at maximum power decreases with increasing the heat conductivity.
description: 7 pages, 3 figures; correct some errors
Explanation Strategies as an Empirical-Analytical Lens for Socio-Technical Contextualization of Machine Learning Interpretability
Creators: name: Benjamin, Jesse Josua
name: Kinkeldey, Christoph
name: Müller-Birn, Claudia
name: Korjakow, Tim
name: Herbst, Eva-Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: H.5; K.4

description: During a research project in which we developed a machine learning (ML) driven visualization system for non-ML experts, we reflected on interpretability research in ML, computer-supported collaborative work and human-computer interaction. We found that while there are manifold technical approaches, these often focus on ML experts and are evaluated in decontextualized empirical studies. We hypothesized that participatory design research may support the understanding of stakeholders' situated sense-making in our project, yet, found guidance regarding ML interpretability inexhaustive. Building on philosophy of technology, we formulated explanation strategies as an empirical-analytical lens explicating how technical explanations mediate the contextual preferences concerning people's interpretations. In this paper, we contribute a report of our proof-of-concept use of explanation strategies to analyze a co-design workshop with non-ML experts, methodological implications for participatory design research, design implications for explanations for non-ML experts and suggest further investigation of technological mediation theories in the ML interpretability space.
description: Conditionally accepted to ACM Group 2022. 25 pages, 4 figures
Transition Phenomena Induced by Internal Noise and Quasi-absorbing State
Creators: name: Ohkubo, Jun
name: Shnerb, Nadav
name: Kessler, David A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a simple chemical reaction system and effects of the internal noise. The chemical reaction system causes the same transition phenomenon discussed by Togashi and Kaneko [Phys. Rev. Lett. 86 (2001) 2459; J. Phys. Soc. Jpn. 72 (2003) 62]. By using the simpler model than Togashi-Kaneko's one, we discuss the transition phenomenon by means of a random walk model and an effective model. The discussion makes it clear that quasi-absorbing states, which are produced by the change of the strength of the internal noise, play an important role in the transition phenomenon. Stabilizing the quasi-absorbing states causes bifurcation of the peaks in the stationary probability distribution discontinuously.
description: 6 pages, 5 figures
Seebeck and Nernst effects in topological insulator: the case of strained HgTe
Creators: name: Peña, Francisco J.
name: Negrete, Oscar
name: Ma, Ning
name: Vargas, Patricio
name: Reis, Mario
name: Lima, Leandro R. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We theoretically study the thermoelectric transport properties of strained HgTe in the topological insulator phase. We developed a model for the system using a Dirac Hamiltonian including the effect of strain induced by the interface between HgTe and the CdTe substrate. The conductivity tensor was explored assuming the electrons are scattered by charge impurities, while the thermopower tensor was addressed using the Mott relation. Seebeck and Nernst responses exhibit remarkable enhancements in comparison with other two-dimensional Dirac materials, such as graphene, germanane, prosphorene and stanene. The intensity of these termoeletric responses, their dependencies with the external perpendicular magnetic field and temperature are also addressed.
Comment on: Failure of the Work-Hamiltonian Connection for Free-Energy Calculations [Phys Rev Lett 100, 020601 (2008), arXiv:0704.0761]
Creators: name: Horowitz, Jordan
name: Jarzynski, Christopher
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We comment on a Letter by Vilar and Rubi [arXiv:0704.0761].
description: one page, including one figure; to appear in Phys Rev Lett
HBT interferometry with quantum transport of the interfering pair
Creators: name: Yu, Li-Li
name: Zhang, Wei-Ning
name: Wong, Cheuk-Yin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the late stage of the evolution of a pion system in high-energy heavy-ion collisions when pions undergo multiple scatterings, the quantum transport of the interfering pair of identical pions plays an important role in determining the characteristics of the Hanbury-Brown-Twiss (HBT) interference. We study the quantum transport of the interfering pair using the path-integral method, in which the evolution of the bulk matter is described by relativistic hydrodynamics while the paths of the two interfering pions by test particles following the fluid positions and velocity fields. We investigate in addition the effects of secondary pion sources from particle decays, for nuclear collisions at AGS and RHIC energies. We find that quantum transport of the interfering pair leads to HBT radii close to those for the chemical freeze-out configuration. Particle decays however lead to HBT radii greater than those for the chemical freeze-out configuration. As a consequence, the combined effects give rise to HBT radii between those extracted from the chemical freeze-out configuration and the thermal freeze-out configuration. Proper quantum treatments of the interfering pairs in HBT calculations at the pion multiple scattering stage are important for our understanding of the characteristics of HBT interferometry in heavy-ion collisions.
description: 14 pages, 4 figures
Resonant Excitation of Disk Oscillations in Deformed Disks III: Revision of Mathematical Treatment
Creators: name: Kato, Shoji
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In previous studies, we have examined a resonant excitation of disk oscillations in deformed disks. In these studies, however, mathematical treatment around the resonant points was not rigorous. In this paper the inadequate point is corrected, with no essential changes in the final results. For this excitation process to work, disks must be general relativistic. That is, the non-monotonic radial distribution of epicyclic frequency in relativistic disks is essential for the presence of the resonance and for trapping of oscillations. In this paper, the growth rate of resonant oscillations is expressed in a form more suitable for numerical calculations.
description: 18pages, to be published in PASJ 60, No. 6, 2008
On the spectrum of the Laplace operator of metric graphs attached at a vertex -- Spectral determinant approach
Creators: name: Texier, Christophe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a metric graph $\mathcal{G}$ made of two graphs $\mathcal{G}_1$ and $\mathcal{G}_2$ attached at one point. We derive a formula relating the spectral determinant of the Laplace operator $S_\mathcal{G}(γ)=\det(γ-Δ)$ in terms of the spectral determinants of the two subgraphs. The result is generalized to describe the attachment of $n$ graphs. The formulae are also valid for the spectral determinant of the Schrödinger operator $\det(γ-Δ+V(x))$.
description: LaTeX, 8 pages, 7 eps figures, v2: new appendix, v3: discussions and ref added
Distributed MIMO Systems with Oblivious Antennas
Creators: name: Simeone, Osvaldo
name: Somekh, Oren
name: Poor, H. Vincent
name: Shamai, Shlomo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A scenario in which a single source communicates with a single destination via a distributed MIMO transceiver is considered. The source operates each of the transmit antennas via finite-capacity links, and likewise the destination is connected to the receiving antennas through capacity-constrained channels. Targeting a nomadic communication scenario, in which the distributed MIMO transceiver is designed to serve different standards or services, transmitters and receivers are assumed to be oblivious to the encoding functions shared by source and destination. Adopting a Gaussian symmetric interference network as the channel model (as for regularly placed transmitters and receivers), achievable rates are investigated and compared with an upper bound. It is concluded that in certain asymptotic and non-asymptotic regimes obliviousness of transmitters and receivers does not cause any loss of optimality.
description: In Proc. of the 2008 IEEE International Symposium on Information Theory (ISIT 2008), Toronto, Ontario, Canada
The effect of partonic wind on charm quark correlations in high-energy nuclear collisions
Creators: name: Zhu, X.
name: Xu, N.
name: Zhuang, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In high-energy collisions, massive heavy quarks are produced back-to-back initially and they are sensitive to early dynamical conditions. The strong collective partonic wind from the fast expanding quark-gluon plasma created in high-energy nuclear collisions modifies the correlation pattern significantly. As a result, the angular correlation function for D$\bar{\rm D}$ pairs is suppressed at the angle $Δϕ=π$. While the hot and dense medium in collisions at RHIC ($\sqrt{s_{NN}}=200$ GeV) can only smear the initial back-to-back D$\bar {\rm D}$ correlation, a clear and strong near side D$\bar{\rm D}$ correlation is expected at LHC ($\sqrt{s_{NN}}=5500$ GeV).
description: 4 pages and 2 figures
Letter from Kathleen Raine to Robin Skelton, May 21, [between 1955 and 1989]
Creators: name: Raine, Kathleen, 1908-2003
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Critics
valueUri: http://id.worldcat.org/fast/883769
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Periodical editors
valueUri: http://id.worldcat.org/fast/1058064
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Raine, Kathleen, 1908-2003
valueUri: http://id.worldcat.org/fast/52672
subject: Periodicals--Publishing
valueUri: http://id.worldcat.org/fast/1058100
subject: English poetry--Manuscripts
valueUri: http://id.worldcat.org/fast/912320
subject: Platonists
valueUri: http://id.worldcat.org/fast/1066881
subject: Philosophy
valueUri: http://id.worldcat.org/fast/1060777
subject: FOS: Philosophy, ethics and religion
subject: Editors
valueUri: http://id.worldcat.org/fast/902475
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: Scholars
valueUri: http://id.worldcat.org/fast/1106878
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Book industries and trade
valueUri: http://id.worldcat.org/fast/836171
subject: Neoplatonism
valueUri: http://id.worldcat.org/fast/1035884
subject: Wiccans
valueUri: http://id.worldcat.org/fast/1765210
subject: Skelton, Robin
valueUri: http://id.worldcat.org/fast/51853
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172

description: Part of a collection of correspondence from Kathleen Raine to Robin Skelton. Skelton was a British poet, academic, anthologist, and practicing Wiccan. He taught at Manchester University before emigrating to Canada in 1963, where he taught creative writing at the University of Victoria and started the literary magazine The Malahat Review. Also included are some letters to Skelton’s wife Sylvia, and his daughters. Spanning close to forty-five years, the correspondence discusses poetry, writing, and philosophy; particularly Platonism and Neoplatonism. Raine often refers to the writings of William Blake and W. B. Yeats. Many letters also mention contemporary literary figures at the time including: Herbert Read, Peter Russell, Liam Miller, and Thurairajah Tambimuttu. In this letter Raine writes about a young writer William [Oxley], comparing him to an old Wyndham Lewis. She also mentions what she has recently been working on.
Obscured High Mass X-Ray Binaries and Supergiant Fast X-ray Transients: Infrared Observations of INTEGRAL Sources
Creators: name: Chaty, Sylvain
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A new type of high-energy binary system has been revealed by the INTEGRAL satellite. These sources are being unveiled by means of multi-wavelength optical, near- and mid-infrared observations. Among these sources, two distinct classes are appearing: the first one is constituted of intrinsically obscured high-energy sources, of which IGR J16318-4848 seems to be the most extreme example. The second one is populated by the so-called supergiant fast X-ray transients, with IGR J17544-2619 being the archetype. We report here on multi-wavelength optical to mid-infrared observations of a sample constituted of 21 INTEGRAL sources. We show that in the case of the obscured sources our observations suggest the presence of absorbing material (dust and/or cold gas) enshrouding the whole binary system. We finally discuss the nature of these two different types of sources, in the context of high energy binary systems.
description: Invited contribution at "A population explosion: the nature and evolution of X-ray binaries in diverse environments", conference held in St.Petersburg Beach, Florida (USA) 28 Oct - 2 Nov 2007; R. M. Bandyopadhyay et al. (eds.)
Danae. Bagliori del mito. Editoriale di Engramma n. 178
Creators: name: Bassani, Maddalena; Pedersoli, Alessandra
Publisher: name: La Rivista di Engramma
Year: 2020
Subjects: Danae
the Classical tradition
mythology

description: The tradition of Greek mythology follows complex, sometimes difficult, paths. Not all its myths are given the same attention over time: such is the case of the story of Danaë, relatively neglected. For fear of being killed by his nephew (as prophesied by the oracle of Delphi) Acrisius, king of Argos, decided to lock his daughter in a tower. Under a golden rain, Danaë was ‘loved’ by Zeus and, in her confinement, conceived a son, Perseus. As punishment, Acrisius closed Danaë and the little Perseus in a nailed wooden box that was thrown into the sea. Mother and child saved themselves and the myth has persisted. This issue of Engramma is dedicated to the afterlife of the myth of Danaë: from Greek Antiquity to contemporary art, passing through the Medieval and Modern traditions. It includes contributions by Barbara Baert, Maddalena Bassani, Monica Centanni, Mario Cesarano, Simona Dolari, Gabriella Fényes, Lorenzo Gigante, Elena Pirazzoli, Carlo Sala, Andrea Torre, and Piermario Vescovo.
Number of points of Prym varieties over finite fields
Creators: name: Perret, Marc
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G10; 11G25; 14G15; 14K15

description: We establish some upper and lower bounds for the number of rational points of Prym varieties over finite fields.
description: 7 pages
Theory of the charge-density wave in $A$V$_3$Sb$_5$ kagome metals
Creators: name: Christensen, Morten H.
name: Birol, Turan
name: Andersen, Brian M.
name: Fernandes, Rafael M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The family of metallic kagome compounds $A$V$_3$Sb$_5$ ($A$=K, Rb, Cs) was recently discovered to exhibit both superconductivity and charge order. The nature of the charge-density wave (CDW) phase is presently unsettled, which complicates the interpretation of the superconducting ground state. In this paper, we use group-theory and density-functional theory (DFT) to derive and solve a phenomenological Landau model for this CDW state. The DFT results reveal three unstable phonon modes with the same in-plane momentum but different out-of-plane momenta, whose frequencies depend strongly on the electronic temperature. This is indicative of an electronically-driven CDW, stabilized by features of the in-plane electronic dispersion. Motivated by the DFT analysis, we construct a Landau free-energy expansion for coupled CDW order parameters with wave-vectors at the $M$ and $L$ points of the hexagonal Brillouin zone. We find an unusual trilinear term coupling these different order parameters, which can promote the simultaneous condensation of both CDWs even if the two modes are not nearly-degenerate. We classify the different types of coupled multi-$\bf{Q}$ CDW orders, focusing on those that break the sixfold rotational symmetry and lead to a unit-cell doubling along all three crystallographic directions, as suggested by experiments. We determine a region in parameter space, characterized by large nonlinear Landau coefficients, where these phases - dubbed staggered tri-hexagonal and staggered Star-of-David - are the leading instabilities of the system. Finally, we discuss the implications of our results for the kagome metals.
description: 17 pages, 11 figures
Granular Rayleigh-Taylor Instability: Experiments and Simulations
Creators: name: Vinningland, Jan Ludvig
name: Johnsen, Oistein
name: Flekkoy, Eirik G.
name: Toussaint, Renaud
name: Maloy, Knut Jorgen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A granular instability driven by gravity is studied experimentally and numerically. The instability arises as grains fall in a closed Hele-Shaw cell where a layer of dense granular material is positioned above a layer of air. The initially flat front defined by the grains subsequently develops into a pattern of falling granular fingers separated by rising bubbles of air. A transient coarsening of the front is observed right from the start by a finger merging process. The coarsening is later stabilized by new fingers growing from the center of the rising bubbles. The structures are quantified by means of Fourier analysis and quantitative agreement between experiment and computation is shown. This analysis also reveals scale invariance of the flow structures under overall change of spatial scale.
description: 4 pages, 11 figures
Letter from Kathleen Raine to Robin Skelton, June 02, [between 1955 and 1989]
Creators: name: Raine, Kathleen, 1908-2003
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Periodical editors
valueUri: http://id.worldcat.org/fast/1058064
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684
subject: Raine, Kathleen, 1908-2003
valueUri: http://id.worldcat.org/fast/52672
subject: Neoplatonism
valueUri: http://id.worldcat.org/fast/1035884
subject: Philosophy
valueUri: http://id.worldcat.org/fast/1060777
subject: FOS: Philosophy, ethics and religion
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: English poetry--Manuscripts
valueUri: http://id.worldcat.org/fast/912320
subject: Skelton, Robin
valueUri: http://id.worldcat.org/fast/51853
subject: Platonists
valueUri: http://id.worldcat.org/fast/1066881
subject: Editors
valueUri: http://id.worldcat.org/fast/902475
subject: Periodicals--Publishing
valueUri: http://id.worldcat.org/fast/1058100
subject: Book industries and trade
valueUri: http://id.worldcat.org/fast/836171
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Wiccans
valueUri: http://id.worldcat.org/fast/1765210
subject: Critics
valueUri: http://id.worldcat.org/fast/883769
subject: Scholars
valueUri: http://id.worldcat.org/fast/1106878

description: Part of a collection of correspondence from Kathleen Raine to Robin Skelton. Skelton was a British poet, academic, anthologist, and practicing Wiccan. He taught at Manchester University before emigrating to Canada in 1963, where he taught creative writing at the University of Victoria and started the literary magazine The Malahat Review. Also included are some letters to Skelton’s wife Sylvia, and his daughters. Spanning close to forty-five years, the correspondence discusses poetry, writing, and philosophy; particularly Platonism and Neoplatonism. Raine often refers to the writings of William Blake and W. B. Yeats. Many letters also mention contemporary literary figures at the time including: Herbert Read, Peter Russell, Liam Miller, and Thurairajah Tambimuttu. In this letter, Raine writes about her plans to spend time off at her cottage for the early summer. She also shares that an acquaintance was recently married, and that as she gets older she is more inclined to sigh at weddings and sing at funerals.
Optics-less smart sensors and a possible mechanism of cutaneous vision in nature
Creators: name: Yaroslavsky, Leonid
name: Goerzen, Chad
name: Umansky, Stanislav
name: Caulfield, H. John
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Optics-less cutaneous (skin) vision is not rare among living organisms, though its mechanisms and capabilities have not been thoroughly investigated. This paper demonstrates, using methods from statistical parameter estimation theory and numerical simulations, that an array of bare sensors with a natural cosine-law angular sensitivity arranged on a flat or curved surface has the ability to perform imaging tasks without any optics at all. The working principle of this type of optics-less sensor and the model developed here for determining sensor performance may be used to shed light upon possible mechanisms and capabilities of cutaneous vision in nature.
Tighter constraints of multiqubit entanglement in terms of unified entropy
Creators: name: Ren, Ya-Ya
name: Wang, Zhi-Xi
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present classes of monogamy inequalities related to the $α$-th ($α\geq 1$) power of the entanglement measure based on the unified-($q,s$) entropy, and polygamy inequalities related to the $β$-th ($0 \leq β\leq 1$) power of the unified-($q,s$) entanglement of assistance by using Hamming weight. We show that these monogamy and polygamy inequalities are tighter than the existing ones. Detailed examples are given for illustrating the advantages.
description: 13 pages, 2 figures. arXiv admin note: text overlap with arXiv:1801.09882 by other authors
On the diagonalization of quadratic Hamiltonians
Creators: name: Härkönen, Ville J.
name: Gonoskov, Ivan A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A new procedure to diagonalize quadratic Hamiltonians is introduced. We show that one can find a unitary transformation such that the transformed quadratic Hamiltonian is diagonal but still written in terms of the original position and momentum observables. We give a general method to diagonalize an arbitrary quadratic Hamiltonian and derive a few of the simplest special cases in detail.
description: 7 pages
Square-integrable coactions of locally compact quantum groups
Creators: name: Buss, Alcides
name: Meyer, Ralf
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 46L55 (Primary) 46L08 81R50 (Secondary)

description: We define and study square-integrable coactions of locally compact quantum groups on Hilbert modules, generalising previous work for group actions. As special cases, we consider square-integrable Hilbert space corepresentations and integrable coactions on C*-algebras. Our main result is an equivariant generalisation of Kasparov's Stabilisation Theorem.
description: 28 pages; LaTeX with AMSart style; typos corrected; to appear in "Reports on Mathematical Physics"
Integral equation for gauge invariant quark two-point Green's function in QCD
Creators: name: Sazdjian, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Gauge invariant quark two-point Green's functions defined with path-ordered gluon field phase factors along skew-polygonal lines joining the quark to the antiquark are considered. Functional relations between Green's functions with different numbers of path segments are established. An integral equation is obtained for the Green's function defined with a phase factor along a single straight line. The equation implicates an infinite series of two-point Green's functions, having an increasing number of path segments; the related kernels involve Wilson loops with contours corresponding to the skew-polygonal lines of the accompanying Green's function and with functional derivatives along the sides of the contours. The series can be viewed as an expansion in terms of the global number of the functional derivatives of the Wilson loops. The lowest-order kernel, which involves a Wilson loop with two functional derivatives, provides the framework for an approximate resolution of the equation.
description: 28 pages, 4 figures
Modeling and verifying a broad array of network properties
Creators: name: Filkov, Vladimir
name: Saul, Zachary M.
name: Roy, Soumen
name: D'Souza, Raissa M.
name: Devanbu, Premkumar T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Software Engineering (cs.SE)
subject: Quantitative Methods (q-bio.QM)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Motivated by widely observed examples in nature, society and software, where groups of already related nodes arrive together and attach to an existing network, we consider network growth via sequential attachment of linked node groups, or graphlets. We analyze the simplest case, attachment of the three node V-graphlet, where, with probability alpha, we attach a peripheral node of the graphlet, and with probability (1-alpha), we attach the central node. Our analytical results and simulations show that tuning alpha produces a wide range in degree distribution and degree assortativity, achieving assortativity values that capture a diverse set of many real-world systems. We introduce a fifteen-dimensional attribute vector derived from seven well-known network properties, which enables comprehensive comparison between any two networks. Principal Component Analysis (PCA) of this attribute vector space shows a significantly larger coverage potential of real-world network properties by a simple extension of the above model when compared against a classic model of network growth.
description: To appear in Europhysics Letters
Mechanical characterization and failure modes in the peeling of adhesively bonded strips from a plastic substrate
Creators: name: Zarei, Hamed
name: Marulli, Maria Rosaria
name: Paggi, Marco
name: Pietrogrande, Riccardo
name: Üffing, Christoph
name: Weißgraeber, Philipp
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: With the aim of understanding failure modes in the peeling of silicone-based adhesive joints and, in particular, the occurrence of adhesive or cohesive failure, an experimental campaign has been conducted by considering plastic substrates with different surface roughness. A flexible strip has been bonded onto such substrates using a silicone adhesive, by controlling its thickness. Peeling tests with 90° and 180° peeling angle configurations have been performed and the effect of joint parameters, such as surface roughness and adhesive thickness, onto the adhesion energy and the failure mode are herein discussed in detail. Experimental results show that the failure mode varies in each peeling test configuration such that in the case of 180° peeling test there is mainly cohesive failure, while for 90° peeling angle, a combination of adhesive and cohesive failure occurs. Moreover, due to the presence of different failure modes in each peeling configuration, the substrate roughness can increase the adhesion energy only in 90° peeling tests.
Influence of the Magnetic Coupling Process on the Advection Dominated Accretion Flows around Black Holes
Creators: name: Ma, R. Y.
name: Yuan, F.
name: Wang, D. X.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A large-scale closed magnetic field can transfer angular momentum and energy between a black hole (BH) and its surrounding accretion flow. We investigate the effects of this magnetic coupling (MC) process on the dynamics of a hot accretion flow (e.g., an advection dominated accretion flow, hereafter ADAF). The energy and angular momentum fluxes transported by the magnetic field are derived by an equivalent circuit approach. For a rapidly rotating BH, it is found that the radial velocity and the electron temperature of the accretion flow decrease, whereas the ion temperature and the surface density increase. The significance of the MC effects depends on the value of the viscous parameter α. The effects are obvious for α=0.3 but nearly ignorable for α=0.1. For a BH with specific angular momentum, a_*=0.9, and α=0.3, we find that for reasonable parameters the radiative efficiency of a hot accretion flow can be increased by about 30%.
description: 21 pages, 7 figures. Changed after the referee's suggestions. Accepted for publication in the Astrophysical Journal
The Warburg Institute and classical studies. Dr. Bing’s address, Convegno di Studi sull’Umanesimo (La Mendola, 27 August 1956)
Creators: name: Bing, Gertrud; Del Prete, Elisa
Publisher: name: La Rivista di Engramma
Year: 2020
Subjects: Gertrud Bing
Warburg Institute
Studi Umanistici

description: The text reproduced here is the report on the activities of the Warburg Institute presented to Italian colleagues, given by Gertrud Bing at the Conference of Humanistic Studies, organized by the Centre of Culture Maria Immacolata of the Catholic University of Milan, in collaboration with the University of Freiburg and the Catholic University of Louvain, at the alpine resort La Mendola on 27 August 1956. The first edition of the text was published in the Appendix to the essay by Elisa Del Prete, Gertrud Bing e l’Italia. L’aggiornamento italiano durante gli anni della sua direzione al Warburg Institute, in C. Cieri Via, M. Forti, published in Warburg e la cultura italiana. Fra sopravvivenze e prospettive di ricerca, Milan 2009, pp. 203-235 (the Bing report is on pp. 227-234). The text was written in Italian by Bing, with the help of Luigi Meneghello, professor at the University of Reading, and under the supervision of Arnaldo Momigliano.
A Semi-Analytic Model for the Co-evolution of Galaxies, Black Holes, and Active Galactic Nuclei
Creators: name: Somerville, Rachel S.
name: Hopkins, Philip F.
name: Cox, Thomas J.
name: Robertson, Brant E.
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new semi-analytic model that self-consistently traces the growth of supermassive black holes (BH) and their host galaxies within the context of the LCDM cosmological framework. In our model, the energy emitted by accreting black holes regulates the growth of the black holes themselves, drives galactic scale winds that can remove cold gas from galaxies, and produces powerful jets that heat the hot gas atmospheres surrounding groups and clusters. We present a comprehensive comparison of our model predictions with observational measurements of key physical properties of low-redshift galaxies, such as cold gas fractions, stellar metallicities and ages, and specific star formation rates. We find that our new models successfully reproduce the exponential cutoff in the stellar mass function and the stellar and cold gas mass densities at z~0, and predict that star formation should be largely, but not entirely, quenched in massive galaxies at the present day. We also find that our model of self-regulated BH growth naturally reproduces the observed relation between BH mass and bulge mass. We explore the global formation history of galaxies in our models, presenting predictions for the cosmic histories of star formation, stellar mass assembly, cold gas, and metals. We find that models assuming the "concordance" LCDM cosmology overproduce star formation and stellar mass at high redshift (z>2). A model with less small-scale power predicts less star formation at high redshift, and excellent agreement with the observed stellar mass assembly history, but may have difficulty accounting for the cold gas in quasar absorption systems at high redshift (z~3-4).
description: MNRAS accepted