cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fact, fiction and faction : a study of Richard II in the light of the historical sources and conflicting attitudes toward man and his role in the historical process
Creators: name: Alston, Brent
Publisher: name: University of British Columbia
Year: 2010

description: A narrative description of an historical event reflects the nature of such an event as seen from a particular perspective. However, Shakespeare's History Plays equate history and drama by re-presenting the drama implicit in events that are surrounded by speculation and interpretation. The audience is thereby placed in the position of having to interpret the drama that purports to be both "dramatic" and "historical" or accept the impossibility of understanding history. Confronted with a representation of a past event, the audience is thrown back upon its own attitudes towards man in the world: the drama merely reflects human nature as the observer experiences and articulates his view of the historical drama. Confounded by what I term the "tragic perspective"—a perspective that the audience is encouraged to experience—the audience's prejudices are purged, momentarily. Finally, the tragic perspective encourages the audience to adopt a paradoxical view of man in the world; despite the seemingly incontravertable evidence that history affords as proof of the essentially "bad" nature of man, we are asked to adopt an essentially creative view that assumes that man is indeed made in the image of his Creator and basically "good". The drama draws upon a deeply rooted hope that man is at least redeemable. Shakespeare reveals the paradoxical consequences of assuming that man is fundamentally "bad" by showing the human suffering that results from assuming the worst. The audience is, of course, free to choose; but our views of the past and the present to a large extent determine the future. This realization is characteristic of the tragic hero's retrospective wisdom—a wisdom that is attained too late. By examining Richard II in the light of the historical sources, I hope to reveal how the audience is left in an ambiguous state when it comes to interpreting the motives of the characters that are both fictional and historical. The Machiavellian attitude toward man, which governs Richard III and is tempered in Richard II, is often brought to bear on the drama when critics attempt to judge the motives of the main characters. In writing History Plays, Shakespeare is recreating ambiguity in the broadest sense. Mystery, as opposed to definitive history, is perhaps the true subject and conclusion of the drama.
An intermediate frequency predistortion linearizer for an earth station traveling-wave tube amplifier
Creators: name: Wlodyka, Mark Jan
Publisher: name: University of British Columbia
Year: 2010

description: In multicarrler single-channel-per-carrier (SCPC) communication system design, intermodulation distortion is often a limiting factor. The intermodulation distortion caused by the AM/AM and AM/PM conversion effect of the microwave transmit high power amplifier (HPA) can be reduced by applying linearization techniques. Various linearization techniques are reviewed and an appropriate scheme is selected for use with a SCPC earth station traveling-wave tube amplifier (TWTA). A nonlinear model based on the third-order distortion phase of a TWTA is used to develop a new linearizer design model. The amplitude and phase transfer characteristics of a 14 GHz TWTA were measured and the results used in the design of an intermediate frequency (IF) predistortion linearizer. The predistortion linearizer developed uses an antiparallel diode distortion generator in a parallel branch network. The linearizer circuit operates at an IF of 280 MHz preceding an upconverter stage and the 14 GHz TWTA. The linearizer was tested with a 20 watt 14 GHz TWTA under two-tone, multicarrler, and noise loading conditions. The experimental linearizer circuit effectively reduced the intermodulation distortion over a considerable range of normal drive levels, providing a 3 dB decrease in output backoff while maintaining a third-order IMD performance of 25 dBc. The linearizer compares favourably with published results of similar predistortion linearizers designed for satellite applications, and shows potential for practical use in low cost Ku band SCPC earth stations.
Hierarchical Structural Analysis Method for Complex Equation-oriented Models
Creators: name: Wang, Chao
name: Wan, Li
name: Xiong, Tifan
name: Xie, Yuanlong
name: Wang, Shuting
name: Ding, Jianwan
name: Chen, Liping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: Structural analysis is a method for verifying equation-oriented models in the design of industrial systems. Existing structural analysis methods need flattening of the hierarchical models into an equation system for analysis. However, the large-scale equations in complex models make structural analysis difficult. Aimed to address the issue, this study proposes a hierarchical structural analysis method by exploring the relationship between the singularities of the hierarchical equation-oriented model and its components. This method obtains the singularity of a hierarchical equation-oriented model by analyzing a dummy model constructed with the parts from the decomposing results of its components. Based on this, the structural singularity of a complex model can be obtained by layer-by-layer analysis according to their natural hierarchy. The hierarchical structural analysis method can reduce the equation scale in each analysis and achieve efficient structural analysis of very complex models. This method can be adaptively applied to nonlinear-algebraic and differential-algebraic equation models. The main algorithms, application cases and comparison with the existing methods are present in this paper. The complexity analysis results show the enhanced efficiency of the proposed method in the structural analysis of complex equation-oriented models. Compared with the existing methods, the time complexity of the proposed method is improved significantly.
description: 23 pages, 10 figures
Wiedemann-Franz law for massless Dirac fermions with implications for graphene
Creators: name: Rycerz, Adam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the 2016 experiment by Crossno et al. [Science 351, 1058 (2016)], electronic contribution to the thermal conductivity of graphene was found to violate the well-known Wiedemann-Franz (WF) law for metals. At liquid nitrogen temperatures, the thermal to electrical conductivity ratio of charge-neutral samples was more than 10 times higher than predicted by the WF law, what was attributed to interactions between particles leading to collective behavior described by hydrodynamics. Here we show, by adapting the handbook derivation of the WF law to the case of massless Dirac fermions, that significantly enhanced thermal conductivity should appear also in few- or even sub-kelvin temperatures, where the role of interactions can be neglected. The comparison with numerical results obtained within the Landauer-Büttiker formalism for rectangular and disk-shaped (Corbino) devices in ballistic graphene is also provided.
description: Minor revisions; Refs. added. RevTeX, 12 pages, 9 figures
Realising Open Digital Infrastructure
Creators: name: Mace, Andreas
name: Knowles, Claire
name: Agustina, Martínez García
Publisher: name: RLUK
Year: 2025

description: "Realising Open Digital Infrastructure", is the final session of this year’s "Realising Open." theme. The session brought together three expert panelists to share their perspectives on adopting, implementing, and supporting open digital infrastructure in research libraries.

The session:

Highlighted diverse experiences in adopting and implementing open digital systems and standards in research libraries.

Explored the challenges and opportunities of moving from pilot projects to sustainable, community-supported practices.

Engaged and encourage collaboration among attendees by highlighting lessons learned 

Our panellists were Andreas Mace (National Library of Sweden) and Claire Knowles (Leeds) on “Adopting Open” and Dr Agustina Martinez Garcia on “Supporting Open".

Webinar available on YouTube at https://www.youtube.com/watch?v=WVuNdsIIbW8 

Andreas Mace

Andreas Mace is a Systems Librarian and Team Leader at the National Library of Sweden, currently working mostly with metadata related workflows and implementing FOLIO and VuFind at the library. He has extensive experience of library open source software and has previously also been active in the Koha and CORAL communities, both in Sweden and internationally. He previously worked as a Systems Librarian and Business Developer at Stockholm University.

Claire Knowles

Claire Knowles is a member of the Library Executive Team at the University of Leeds. She provides strategic leadership for the Library Research Services, encompassing open research, repository services, research data management, bibliometrics, and open access funder compliance. As co-chair of the Responsible Research Metrics and Open Research Groups, Claire collaborates with academic chairs to develop institutional statements and strategic plans. She partners with colleagues in faculties and professional services to embed changes within research practices, aligning with the University’s Research Culture Statement and Strategic Plan. Additionally, Claire is the product owner of the library's IT systems and serves as the project lead for the Digital Library Infrastructure Project. She is also the co-convenor of the RLUK Digital Shift Working Group and a member of the IIIF Executive Committee.

Agustina Martinez Garcia

Dr Agustina Martínez García is the Head of Open Research Systems at Cambridge University Library (CUL), University of Cambridge. She leads the Open Research Systems Team and is also responsible for the development of an Open Research Infrastructure roadmap that is part of a wider university Open Research Programme led by CUL. In her role, she’s also leading the development of Cambridge’s Institutional Repository, Apollo, a locally developed DSpace repository that is key to support open research practices at the University. She is a strong advocate of open-source technologies, and the role they play in the wider open research and scholarly ecosystems.
Control and measurement of electric dipole moments in levitated optomechanics
Creators: name: Afek, Gadi
name: Monteiro, Fernando
name: Siegel, Benjamin
name: Wang, Jiaxiang
name: Dickson, Sarah
name: Recoaro, Juan
name: Watts, Molly
name: Moore, David C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Levitated optomechanical systems are rapidly becoming leading tools for precision sensing, enabling a high level of control over the sensor's center of mass motion, rotation and electric charge state. Higher-order multipole moments in the charge distribution, however, remain a major source of backgrounds. By applying controlled precessive torques to the dipole moment of a levitated microsphere in vacuum, we demonstrate cancellation of dipole-induced backgrounds by 2 orders of magnitude. We measure the dipole moments of ng-mass spheres and determine their scaling with sphere size, finding that the dominant torques arise from induced dipole moments related to dielectric-loss properties of the SiO$_2$ spheres. Control of multipole moments in the charge distribution of levitated sensors is a key requirement to sufficiently reduce background sources in future applications.
description: 5 pages, 4 figures
Exact low-temperature properties of a class of highly frustrated Hubbard models
Creators: name: Derzhko, Oleg
name: Honecker, Andreas
name: Richter, Johannes
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the repulsive Hubbard model both analytically and numerically on a family of highly frustrated lattices which have one-electron states localized on isolated trapping cells. We construct and count exact many-electron ground states for a wide range of electron densities and obtain closed-form expressions for the low-temperature thermodynamic quantities. Furthermore, we find that saturated ferromagnetism is obtained only for sufficiently high electron densities and large Hubbard repulsion $U$ while there is no finite average moment in the ground states at lower densities.
description: 8 pages, 7 figures, accepted for publication in Phys. Rev. B
La doppia prospettiva della S capovolta in Sarrasine di Balzac
Creators: name: Scuro, Giulia
Publisher: name: Università degli  Studi di Milano
Year: 2015
Subjects: Sarrasine, finestra, mise en abyme, androginia

description: The mise en abyme in Sarrasine, a short story written by Balzac in 1831, is an interesting example of the metaphor of the literary window. This paper starts from the analysis of windows’ basic architectural functions, because the mise en abyme structure allows Balzac to describe the secrets of a mysterious character at a party just as an observer at the window: inside and outside the plot as inside and outside the space.

The view from a window is generally limited by a frame and by the transparency of glass. In Sarrasine these limits are symbolized by the artistic creative process. The story is about a castrato named Zambinella, and a portrait situated into Lanty’s house is the pretext to explain his relation with the family. Zambinella’s androgyny is a Leitmotiv in Sarrasine, but the characters fascinated by his ambiguity are both disgusted and attracted when they discover the real nature of his sex.

Maybe Balzac underlined the importance of seeing through the glass because he aimed to denounce the sexual censorship around intersexuality. The mise en abyme as a window shows how reality is susceptible of a double lecture – active and passive – and the hermaphrodite himself represents the denial of a too strict division between sexual genders.
description: Altre Modernità, 2015: NUMERO SPECIALE Finestre: sguardi e riflessi, trasparenze e opacità
Due semantiche del 'vedere' ne I giorni e gli anni di Uwe Johnson
Creators: name: Schild-Vitale, Sabine
Publisher: name: Università degli  Studi di Milano
Year: 2015
Subjects: Uwe Johnson; Jahrestage; Martin Heidegger; thing theory; Francesco

description: The present study addresses two questions. First, how do extra-textual elements become, by means of fiction, aesthetic structures? Second, which function can be traced back to the 'window' as a space of enunciation? Through an analysis of a chapter of «Anniversaries» of Uwe Johnson, we aim to reveal how the description of an event gives rise to two different semantics of 'viewing'. Whereas the window figures on the one hand as a mere frame which comes between the outside and inside – i.e., between the subject and the object that is meant to be represented – on the other hand the window is elevated to the function of an authentic mode of knowing. This analysis shows that the two semantics of 'viewing' create a space of enunciation. In the first case, the act of 'viewing' coincides with the principle of imitatio naturae, whereas in the second case, one witnesses images one after the other, which are defined by the act of 'viewing', as a prolongation of past events. The effect of this rhetorical device becomes evident in a shift of interest from the question of reference, to the question of mediation between 'configuration' and 'postfiguration'.
description: Altre Modernità, 2015: NUMERO SPECIALE Finestre: sguardi e riflessi, trasparenze e opacità
Semi-Classical Quantum Fields Theories and Frobenius Manifolds
Creators: name: Park, Jae-Suk
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that a semi-classical quantum field theory comes with a versal family with the property that the corresponding partition function generates all path integrals and satisfies a system of 2nd order differential equations determined by algebras of classical observables. This versal family gives rise to a notion of special coordinates that is analogous to that in string theories. We also show that for a large class of semi-classical theories, their moduli space has the structure of a Frobenius super-manifold.
Coupling of complex function theory and finite element method for crack propagation through energetic formulation: conformal mapping approach and reduction to a Riemann-Hilbert problem
Creators: name: Legatiuk, Dmitrii
name: Weisz-Patrault, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Complex Variables (math.CV)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 30B40, 30C20, 30E10, 35Q15, 35Q74, 74H10, 74R10

description: In this paper we present a theoretical background of a coupled analytical-numerical approach to model a crack propagation process in two-dimensional bounded domains. The goal of the coupled analytical-numerical approach is to obtain the correct solution behaviour near the crack tip by help of the analytical solution constructed by using tools of the complex function theory and couple it continuously with the finite element solution in the region far from singularity. In this way, crack propagation could be modelled without using remeshing. Possible directions of crack growth can be calculated through the minimization of the total energy composed of the potential energy and the dissipated energy based on the energy release rate. Within this setting, an analytical solution of a mixed boundary value problem based on complex analysis and conformal mapping techniques is presented in a circular region containing an arbitrary crack path. More precisely, the linear elastic problem is transformed into a Riemann-Hilbert problem in the unit disk for holomorphic functions. Utilising advantages of the analytical solution in the region near the crack tip, the total energy could be evaluated within short computation times for various crack kink angles and lengths leading to a potentially efficient way of computing the minimization procedure. To this end, the paper presents a general strategy of the new coupled approach for crack propagation modelling. Additionally, we also discuss obstacles on the way of practical realisation of this strategy.
VAFB-2023-30: National Register of Historic Places Evaluation: Prehistoric Sites in Zones 3 through 5 Vandenberg Space Force Base Santa Barbara County, California
Creators: name: Zalud, Arianna
Year: 2023

description: This document is a Section 110 report that includes the evaluation of cultural resources for eligibility for listing in the National Register of Historic Places. Numerous archaeological excavation projects have occurred on Vandenberg Space Force Base, wherein a sufficient amount of data has been obtained to evaluate the eligibility of a prehistoric archaeological site for listing on the National Register, but the federal agency eligibility determination was never presented to the State Historic Preservation Officer for consensus determination. This report presents evaluations for 15 prehistoric archaeological sites located in Zones 3-5 on north Vandenberg Space Force Base.
Spin degrees and Polarization Observables in Electromagnetic Reactions
Creators: name: Arenhoevel, Hartmuth
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: After a brief introduction into the general importance of polarization observables for the analysis of a reaction, the basic density matrix formalism for the description of polarization phenomena is outlined and illustrated by explicit examples for spin one-half and one. Then various electromagnetic processes like photoreactions and electron scattering are discussed in some detail. Finally, the question of how to determine a complete set of polarization observables providing the maximum information on a reaction is considered.
description: Lectures delivered at the DAE-BRNS Workshop on Hadron Physics, AMU, Aligarh, India, Feb. 18-23, 2008. 24 pages, 13 figures, revtex4
The Bullough-Dodd model coupled to matter fields
Creators: name: Assis, P. E. G.
name: Ferreira, L. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The Bullough-Dodd model is an important two dimensional integrable field theory which finds applications in physics and geometry. We consider a conformally invariant extension of it, and study its integrability properties using a zero curvature condition based on the twisted Kac-Moody algebra A_2^{(2)}. The one and two-soliton solutions as well as the breathers are constructed explicitly . We also consider integrable extensions of the Bullough-Dodd model by the introduction of spinor (matter) fields. The resulting theories are conformally invariant and present local internal symmetries. All the one-soliton solutions, for two examples of those models, are constructed using an hybrid of the dressing and Hirota methods. One model is of particular interest because it presents a confinement mechanism for a given conserved charge inside the solitons.
description: 48 pages, 3 eps figures, latex
Detection of new O-type stars in the obscured stellar cluster Tr 16-SE in the Carina Nebula with KMOS
Creators: name: Preibisch, Thomas
name: Flaischlen, Stefan
name: Göppl, Christiane
name: Ercolano, Barbara
name: Roccatagliata, Veronica
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Carina Nebula harbors a large population of high-mass stars, including at least 75 O-type and Wolf-Rayet stars, but the current census is not complete since further high-mass stars may be hidden in or behind the dense dark clouds that pervade the association. With the aim of identifying optically obscured O- and early B-type stars in the Carina Nebula, we performed the first infrared spectroscopic study of stars in the optically obscured stellar cluster Tr 16-SE, located behind a dark dust lane south of eta Car. We used the integral-field spectrograph KMOS at the ESO VLT to obtain H- and K-band spectra with a resolution of R sim 4000 (Delta lambda sim 5 A) for 45 out of the 47 possible OB candidate stars in Tr 16-SE, and we derived spectral types for these stars. We find 15 stars in Tr 16-SE with spectral types between O5 and B2 (i.e., high-mass stars with M >= 8 Msun, only two of which were known before. An additional nine stars are classified as (Ae)Be stars (i.e., intermediate-mass pre-main-sequence stars), and most of the remaining targets show clear signatures of being late-type stars and are thus most likely foreground stars or background giants unrelated to the Carina Nebula. Our estimates of the stellar luminosities suggest that nine of the 15 O- and early B-type stars are members of Tr 16-SE, whereas the other six seem to be background objects. Our study increases the number of spectroscopically identified high-mass stars (M >= 8 Msun) in Tr 16-SE from two to nine and shows that Tr 16-SE is one of the larger clusters in the Carina Nebula. Our identification of three new stars with spectral types between O5 and O7 and four new stars with spectral types O9 to B1 significantly increases the number of spectroscopically identified O-type stars in the Carina Nebula.
description: Accepted for publication in Astronomy & Astrophysics
Evaluation of Portable Acceleration Solutions for LArTPC Simulation Using Wire-Cell Toolkit
Creators: name: Yu, Haiwang
name: Dong, Zhihua
name: Knoepfel, Kyle
name: Lin, Meifeng
name: Viren, Brett
name: Yu, Kwangmin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The Liquid Argon Time Projection Chamber (LArTPC) technology plays an essential role in many current and future neutrino experiments. Accurate and fast simulation is critical to developing efficient analysis algorithms and precise physics model projections. The speed of simulation becomes more important as Deep Learning algorithms are getting more widely used in LArTPC analysis and their training requires a large simulated dataset. Heterogeneous computing is an efficient way to delegate computing-heavy tasks to specialized hardware. However, as the landscape of the compute accelerators is evolving fast, it becomes more and more difficult to manually adapt the code constantly to the latest hardware or software environments. A solution which is portable to multiple hardware architectures while not substantially compromising performance would be very beneficial, especially for long-term projects such as the LArTPC simulations. In search of a portable, scalable and maintainable software solution for LArTPC simulations, we have started to explore high-level portable programming frameworks that support several hardware backends. In this paper, we will present our experience porting the LArTPC simulation code in the Wire-Cell toolkit to NVIDIA GPUs, first with the CUDA programming model and then with a portable library called Kokkos. Preliminary performance results on NVIDIA V100 GPUs and multi-core CPUs will be presented, followed by a discussion of the factors affecting the performance and plans for future improvements.
description: 10 pages, vCHEP2021
A SuperMassive Black Hole Fundamental Plane for Ellipticals
Creators: name: Barway, Sudhanshu
name: Kembhavi, Ajit
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We obtain the coefficients of a new fundamental plane for supermassive black holes at the centers of elliptical galaxies, involving measured central black hole mass and photometric parameters which define the light distribution. The galaxies are tightly distributed around this mass fundamental plane, with improvement in the rms residual over those obtained from the $\mbh-σ$ and $\mbh-L$ relations. This implies a strong multidimensional link between the central massive black hole formation and global photometric properties of elliptical galaxies and provides an improved estimate of black hole mass from galaxy data.
description: Accepted for publication in ApJ Letters
N-photon amplitudes in a plane-wave background
Creators: name: Edwards, James P.
name: Schubert, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use the worldline formalism to derive master formulas for the one-loop N-photon amplitudes in a plane-wave background, for both scalar and spinor QED. This generalises previous work by Ilderton and Torgrimsson for the vacuum polarisation case, although with some change in methodology since, instead of evaluating the path integral on the semi-classical trajectory, we use the special kinematics of the plane-wave background to uncover the crypto-gaussian character of this type of worldline path integral.
description: 16 pages, no figures
Injection of Oort Cloud Comets: The Fundamental Role of Stellar Perturbations
Creators: name: Rickman, H.
name: Fouchard, M.
name: Froeschlé, Ch.
name: Valsecchi, G. B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Monte Carlo simulations of the dynamical evolution of the Oort cloud over the age of the Solar System, using an initial sample of one million test comets without any cloning. Our model includes perturbations due to the Galactic tide (radial and vertical) and passing stars. We present the first detailed analysis of the injection mechanism into observable orbits by comparing the complete model with separate models for tidal and stellar perturbations alone. We find that a fundamental role for injecting comets from the region outside the loss cone (perihelion distance q > 15 AU) into observable orbits (q < 5 AU) is played by stellar perturbations. These act in synergy with the tide such that the total injection rate is significantly larger than the sum of the two separate rates. This synergy is as important during comet showers as during quiescent periods and concerns comets with both small and large semi-major axes. We propose different dynamical mechanisms to explain the synergies in the inner and outer parts of the Oort Cloud. We find that the filling of the observable part of the loss cone under normal conditions in the present-day Solar System rises from <1 % for a < 20 000 AU to about 100 % for a >= 100 000 AU.
description: 30 pages, 14 figures. The paper is accepted for publication in CM&DA
Spatial control of extreme ultraviolet light with opto-optical phase modulation
Creators: name: Olofsson, Anna
name: Simpson, Emma Rose
name: Ibrakovic, Neven
name: Bengtsson, Samuel
name: Mauritsson, Johan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Extreme-ultraviolet (XUV) light is notoriously difficult to control due to its strong interaction cross-section with media. We demonstrate a method to overcome this problem by using Opto-Optical Modulation guided by a geometrical model to shape XUV light. A bell-shaped infrared light pulse is shown to imprint a trace of its intensity profile onto the XUV light in the far-field, such that a change in the intensity profile of the infrared pulse leads to a change in the shape of the far-field XUV light. The geometrical model assists the user in predicting the effect of a specific intensity profile of the infrared pulse, thus enabling a deterministic process.
Max-Plus decomposition of supermartingales and convex order. Application to American options and portfolio insurance
Creators: name: Karoui, Nicole El
name: Meziou, Asma
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 60G07, 60G40, 60G51, 16Y60, 60E15 (Primary) 91B28, 60G44 (Secondary)

description: We are concerned with a new type of supermartingale decomposition in the Max-Plus algebra, which essentially consists in expressing any supermartingale of class $(\mathcal{D})$ as a conditional expectation of some running supremum process. As an application, we show how the Max-Plus supermartingale decomposition allows, in particular, to solve the American optimal stopping problem without having to compute the option price. Some illustrative examples based on one-dimensional diffusion processes are then provided. Another interesting application concerns the portfolio insurance. Hence, based on the ``Max-Plus martingale,'' we solve in the paper an optimization problem whose aim is to find the best martingale dominating a given floor process (on every intermediate date), w.r.t. the convex order on terminal values.
description: Published in at http://dx.doi.org/10.1214/009117907000000222 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The replicability crisis and the p-value debate – what are the consequences for the agricultural and food economics community?
Creators: name: Heckelei, Thomas
name: Huettel, Silke
name: Odening, Martin
name: Rommel, Jens
name: Heckelei, Thomas
name: Huettel, Silke
name: Odening, Martin
name: Rommel, Jens
Publisher: name: Unknown
Year: 2021
Subjects: subject: Research Methods/ Statistical Methods
subject: statistical inference
subject: p-hacking
subject: pre-registration
subject: publication bias
subject: replication crisis

description: A vivid debate is ongoing in the scientific community about statistical malpractice and the related publication bias. No general consensus exists on the consequences and this is reflected in heterogeneous rules defined by scientific journals on the use and reporting of statistical inference. This paper aims at discussing how the debate is perceived by the agricultural economics community and implications for our roles as researchers, contributors to the scientific publication process, and teachers. We start by summarizing the current state of the p-value debate and the replication crisis, and commonly applied statistical practices in our community. This is followed by motivation, design, results and discussion of a survey on statistical knowledge and practice among the researchers in the agricultural economics community in Austria, Germany and Switzerland. We conclude that beyond short-term measures like changing rules of reporting in publications, a cultural change regarding empirical scientific practices is needed that stretches across all our roles in the scientific process. Acceptance of scientific work should largely be based on the theoretical and methodological rigor and where the perceived relevance arises from the questions asked, the methodology employed, and the data used but not from the results generated. Revised and clear journal guidelines, the creation of resources for teaching and research, and public recognition of good practice are suggested measures to move forward.
СОВРЕМЕННЫЕ ТЕНДЕНЦИИ ОБУЧЕНИЯ ПЕРЕВОДЧЕСКОЙ СЕМАНТОГРАФИИ В УСТНОМ ПЕРЕВОДЕ
Creators: name: Makeeva, Aleksandra
name: Filatova, Elena
Publisher: name: figshare
Year: 2021
Subjects: subject: Linguistics
subject: FOS: Languages and literature

description: Работа посвящена изучению современным тенденция обучения переводческой семантографии и использования других методов фиксации информации. Представлены трудности и характерные особенности, с которыми сталкиваются студенты при обучении, а также специалисты в процессе устного перевода.
An investigation of student ideas regarding two physical phenomena
Creators: name: Axford, James Herbert
Publisher: name: University of British Columbia
Year: 2010

description: The general problem investigated was the relationship between the ideas that a student derives from a study of scientific paradigms and those the student derives from other informal sources. There were specific facets of the general problem: to investigate if students possess characteristic ideas, to investigate the effect of physics training on student ideas, to investigate if student ideas contain inconsistencies, and if students with consistent ideas are successful in applying scientific paradigms. Student ideas of two physical phenomena, accelerated motion and simple harmonic motion, were investigated using three paper and pencil tests. The boundaries between which ideas a student derived from informal sources and from the study of scientific paradigms was not clear and therefore the case study methodology was used. Different facets of the investigation used different cases: varying from the classroom to the individual student. It was found that the use of a variety of instruments allowed the ideas a student derives from informal sources and those the student derives from a study of the scientific paradigms to be revealed. Students of different age/grade ranges were found to possess ideas that were characteristic. Physics instruction was found to have significant effects. However, it was also found that some students retained ideas that were inconsistent with the scientific paradigms even after physics instruction. This illustrated that students could possess ideas that were inconsistent with each other. However, it was shown that it was possible for a student to resolve these inconsistencies. It was proposed that teaching strategies needed to be developed that would help students resolve inconsistent ideas.
Establishing and Measuring Standard Spreadsheet Practices for End-Users
Creators: name: Cleere, Garry
Publisher: name: arXiv
Year: 2008
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: This paper offers a brief review of cognitive verbs typically used in the literature to describe standard spreadsheet practices. The verbs identified are then categorised in terms of Bloom's Taxonomy of Hierarchical Levels, and then rated and arranged to distinguish some of their qualities and characteristics. Some measurement items are then evaluated to see how well computerised test question items validate or reinforce training or certification. The paper considers how establishing standard practices in spreadsheet training and certification can help reduce some of the risks associated with spreadsheets, and help promote productivity.
description: 15 Pages, 5 Tables, 9 Colour Figures
van der Waals heterostructures based on atomically-thin superconductors
Creators: name: Boix-Constant, Carla
name: Mañas-Valero, Samuel
name: Córdoba, Rosa
name: Coronado, Eugenio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Van der Waals heterostructures (vdWHs) allow the assembly of high-crystalline two-dimensional (2D) materials in order to explore dimensionality effects in strongly correlated systems and the emergence of potential new physical scenarios. In this work, it is illustrated the feasibility to integrate 2D materials in-between 2D superconductors. Particularly, it is presented the fabrication and electrical characterization of vertical vdWHs based on air-unstable atomically-thin transition metal dichalcogenides formed by NbSe2/TaS2/NbSe2 stacks, with TaS2 being the insulator 1T-TaS2 or the metal 2H-TaS2. Phase transitions as 1T-TaS2 charge density wave and NbSe2 superconductivity are detected. An enhancement of the vdWH resistance due to Andreev reflections is observed below the superconducting transition temperature of the NbSe2 flakes. Moreover, in the NbSe2 superconducting state, the field and temperature dependence of the normalized conductance is analyzed within the Dynes' model and the overall behavior is consistent with the Bardeen-Cooper-Schrieffer theory. This vdWH approach can be extended to other 2D materials, such as 2D magnets or topological insulators, with the aim of exploring the new emergent properties that may arise from such combinations.
description: 18 pages, 5 figures
SLE in the three-state Potts model - a numerical study
Creators: name: Gamsa, Adam
name: Cardy, John
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The scaling limit of the spin cluster boundaries of the Ising model with domain wall boundary conditions is SLE with kappa=3. We hypothesise that the three-state Potts model with appropriate boundary conditions has spin cluster boundaries which are also SLE in the scaling limit, but with kappa=10/3. To test this, we generate samples using the Wolff algorithm and test them against predictions of SLE: we examine the statistics of the Loewner driving function, estimate the fractal dimension and test against Schramm's formula. The results are in support of our hypothesis.
description: 32 pages, 41 figures
Prediction of unconventional magnetism in doped FeSb2
Creators: name: Mazin, I. I.
name: Koepernik, K.
name: Johannes, M. D.
name: González-Hernández, Rafael
name: Šmejkal, Libor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It is commonly believed that in typical collinear antiferromagnets, with no net magnetization, the energy bands are spin-(Kramers-degenerate. The opposite case is usually associated with a global time-reversal symmetry breaking (e.g., via ferro(i)magnetism), or with the spin-orbit interaction is combined with the broken spatial inversion symmetry. Recently, another type of spin splitting was demonstrated to emerge in some fully compensated by symmetry, nonrelativistic, collinear magnets, and not even necessarily non-centrosymmetric. These materials feature non-zero spin density staggered not only in real, but also in momentum space. This duality results in a combination of characteristics typical of ferro- and antiferromagnets. Here we discuss this novel concept in application to a well-known semiconductor, FeSb2, and predict that upon certain alloying it becomes magnetic, and features such magnetic duality. The calculated energy bands split antisymmetrically with respect to spin degenerate nodal surfaces (and not nodal points, as in the case of spin-orbit splitting. This combination of a large (0.2 eV) spin splitting, compensated net magnetization and metallic ground-state, and a particular magnetic easy axis generate a large anomalous Hall conductivity (~150 S/cm) and a sizable magneto-optical Kerr effect, all deemed to be hallmarks of nonzero net magnetization. We identify a large contribution to the anomalous response originating from the spin-orbit interaction gapped anti-Kramers nodal surfaces, a mechanism distinct from the nodal lines and Weyl {\it points} in ferromagnets.
description: minor corrections to the references list
A Survey of Lepton Number Violation Via Effective Operators
Creators: name: de Gouvea, Andre
name: Jenkins, James
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We survey 129 lepton number violating effective operators, consistent with the minimal Standard Model gauge group and particle content, of mass dimension up to and including eleven. Upon requiring that each one radiatively generates the observed neutrino masses, we extract an associated characteristic cutoff energy scale which we use to calculate other observable manifestations of these operators for a number of current and future experimental probes, concentrating on lepton number violating phenomena. These include searches for neutrinoless double-beta decay and rare meson, lepton, and gauge boson decays. We also consider searches at hadron/lepton collider facilities in anticipation of the LHC and the future ILC. We find that some operators are already disfavored by current data, while more are ripe to be probed by next-generation experiments. We also find that our current understanding of lepton mixing disfavors a subset of higher dimensional operators. While neutrinoless double-beta decay is the most promising signature of lepton number violation for the majority of operators, a handful is best probed by other means. We argue that a combination of constraints from various independent experimental sources will help to pinpoint the ``correct'' model of neutrino mass, or at least aid in narrowing down the set of possibilities.
description: 34 pages, 10 eps figures, 1 table
title: Through-space interactions in thermally activated delayed fluorescent emitters : novel materials and organic light emitting diodes
Creators: name: Sharma, Nidhi
Publisher: name: University of St Andrews
Year: 2020

description: Thermally activated delayed fluorescence (TADF) has emerged as one of the most promising and efficient approaches realizing highly efficient organic light emitting diodes (OLEDs). This attractive approach utilizes organic emitters that can harvest all the excitons generated during the electroluminescent process to achieve 100% internal quantum efficiency. The TADF mechanism relies on the recruitment of triplet excitons, which occurs through their conversion to singlet excitons through a rapid reverse intersystem crossing (RISC) made possible by a very small singlet-triplet excited state energy difference (ΔE[sub](ST)). Since the first report of an efficient TADF OLED was published in 2012, the field has witnessed a tremendous development over the last 8 years. Many efforts have been devoted in developing an ideal TADF emitter with high photoluminescence quantum yield (Φ[sub](PL)), small ΔE[sub](ST), short delayed electroluminescence lifetime (τ[sub](d)) which should translate to OLEDs with high external quantum efficiencies (EQEs) and better efficiency roll offs. Various design strategies have been proposed, explored and adopted to optimize TADF materials for OLED applications. Throughout the course of this thesis, a design strategy based on “through-space” interactions has been extensively explored to optimize the material and device parameters in TADF. [2.2]Paracyclophane and spiro-conjugated scaffolds are introduced to the design pool of TADF materials and through the careful modulation of through-space interactions both theoretically and experimentally, the photo-physical properties are optimized, and state-of-the-art OLED performances are demonstrated.
Glue-and-Cut at Five Loops
Creators: name: Georgoudis, Alessandro
name: Gonçalves, Vasco
name: Panzer, Erik
name: Pereira, Raul
name: Smirnov, Alexander V.
name: Smirnov, Vladimir A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute epsilon-expansions around 4 dimensions of a complete set of master integrals for momentum space five-loop massless propagator integrals in dimensional regularization, up to and including the first order with contributions of transcendental weight nine. Our method is the glue-and-cut technique from Baikov and Chetyrkin, which proves extremely effective in that it determines all expansion coefficients to this order in terms of recursively one-loop integrals and only one further integral. We observe that our results are compatible with conjectures that predict $π$-dependent contributions.
description: 20 pages, 8 figures
Does the Chapman-Enskog expansion for viscous granular flows converge?
Creators: name: Santos, Andres
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This paper deals with the convergence/divergence issue of the Chapman-Enskog series expansion of the shear and normal stresses for a granular gas of inelastic hard spheres. From the exact solution of a simple kinetic model in the uniform shear and longitudinal flows, it is shown that (except in the elastic limit) both series converge and their respective radii of convergence increase with inelasticity. This paradoxical result can be understood in terms of the time evolution of the Knudsen number and the existence of a nonequilibrium steady state.
description: 3 pages, 1 figure; submitted for publication in the Proceedings of the XVth International Congress on Rheology (August 3-8, 2008, Monterey, California)
Probing the Electronic Structure of Bilayer Graphene by Raman Scattering
Creators: name: Malard, L. M.
name: Nilsson, J.
name: Elias, D. C.
name: Brant, J. C.
name: Plentz, F.
name: Alves, E. S.
name: Neto, A. H. Castro
name: Pimenta, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electronic structure of bilayer graphene is investigated from a resonant Raman study using different laser excitation energies. The values of the parameters of the Slonczewski-Weiss-McClure model for graphite are measured experimentally and some of them differ significantly from those reported previously for graphite, specially that associated with the difference of the effective mass of electrons and holes. The splitting of the two TO phonon branches in bilayer graphene is also obtained from the experimental data. Our results have implications for bilayer graphene electronic devices.
description: 4 pages, 4 figures