cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Topological Floquet Flat Bands in Irradiated Alternating Twist Multilayer Graphene
Creators: name: Huang, Yingyi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the appearance of topological Floquet flat bands in alternating-twist multilayer graphene, which has alternating relative twist angle $\pmθ$ near the first magic angle. While the system hosts both flat bands and a steep Dirac cone in the static case, the circularly polarized laser beam can open a gap at the Moiré $K$ point and create Floquet flat bands carrying nonzero Chern numbers. Considering recent lattice-relaxation results, we find that the topological flat band is well-isolated for the effective interlayer tunneling in $n=3, 4, 5$ layers. Such dynamically produced topological flat bands are potentially observed in the experiment and thus provide a feasible way to realize the fractional Chern insulator.
description: 8 pages,6 figures, published version
Blanco Sarto, Pablo: Joseph Ratzinger, Benedicto XVI. Una mapa de sus idéas
Creators: name: Neumann, Veit
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 30 Nr. 1 (2014): Forum Katholische Theologie, Band 30, Heft 1
Quantum Imaging Technologies
Creators: name: Malik, Mehul
name: Boyd, Robert W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Over the past three decades, quantum mechanics has allowed the development of technologies that provide unconditionally secure communication. In parallel, the quantum nature of the transverse electromagnetic field has spawned the field of quantum imaging that encompasses technologies such as quantum ghost imaging and high-dimensional quantum key distribution (QKD). The emergence of such quantum technologies also highlights the need for the development of methods for characterizing the elusive quantum state itself. In this document, we describe new technologies that use the quantum properties of light for security. The first is a technique that extends the principles behind QKD to the field of imaging. By applying the polarization-based BB84 protocol to individual photons in an active imaging system, we obtained images that are secure against intercept-resend jamming attacks. The second technology presented in this article is based on an extension of quantum ghost imaging. We used a holographic filtering technique to build a quantum ghost image identification system that uses a few pairs of photons to identify an object from a set of known objects. The third technology addressed in this document is a high-dimensional QKD system that uses orbital-angular-momentum (OAM) modes of light for encoding. Moving to a high-dimensional state space in QKD allows one to impress more information on each photon, as well as introduce higher levels of security. We discuss the development of two OAM-QKD protocols based on the BB84 and Ekert QKD protocols. The fourth and final technology presented in this article is a relatively new technique called direct measurement that uses sequential weak and strong measurements to characterize a quantum state. We use this technique to characterize the quantum state of a photon with a dimensionality of d=27, and measure its rotation in the natural basis of OAM.
description: 63 pages, 37 figures
Spin and valley polarization of plasmons in silicene due to external fields
Creators: name: Van Duppen, B.
name: Vasilopoulos, P.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic properties of the novel two dimensional (2D) material silicene are strongly influenced by the application of a perpendicular electric field $E_z$ and of an exchange field $M$ due to adatoms positioned on the surface or a ferromagnetic substrate. Within the random phase approximation, we investigate how electron-electron interactions are affected by these fields and present analytical and numerical results for the dispersion of plasmons, their lifetime, and their oscillator strength. We find that the combination of the fields $E_z$ and $M$ brings a spin and valley texture to the particle-hole excitation spectrum and allows the formation of spin- and valley-polarized plasmons. When the Fermi level lies in the gap of one spin in one valley, the intraband region of the corresponding spectrum disappears. For zero $E_z$ and finite $M$ the spin symmetry is broken and spin polarization is possible. The lifetime and oscillator strength of the plasmons are shown to depend strongly on the number of spin and valley type electrons that form the electron-hole pairs.
Numerical modelling of complex thermo-hydro-mechanical interactions in thermo-active pile foundations
Creators: name: Liu, Ryan Yin Wai
Publisher: name: Imperial College London
Year: 2022

description: Thermo-active piles have gained popularity in recent years due to their dual role of providing structural stability as foundations and exchanging heat with the ground as ground source heat exchangers to provide low carbon heating and cooling. The installation of thermo-active piles is further facilitated by the enforcement of sustainability targets, such as the Merton Rule, which requires a proportion of the energy demand of a building to be met by renewable energy generated on site. When thermo-active piles operate and are, therefore, subjected to changes in temperature, the existence of a temperature field and the resulting thermal expansion and contraction of materials induces a complex thermo-mechanical response. The objective of the research presented in this thesis is to investigate the thermo-mechanical behaviour of thermo-active piles when they are subjected to changes in temperature, which can be due to the heat of hydration generated when they are cast, or their operation. This is achieved by performing fully coupled thermo-hydro-mechanical (THM) finite-element (FE) analyses using the Imperial College Finite Element Program (ICFEP). In order to simulate accurately the thermo-mechanical behaviour of thermo-active piles resulting from their operation, three-dimensional (3D) analyses are carried out where the heat exchanger pipes are explicitly modelled. However, these analyses are computationally expensive that render them impractical to perform in routine engineering design. A simplified method to model the problem using only two-dimensional (2D) analyses is developed. To model accurately the amount of heat generated from the hydration of concrete, a simple concrete heat of hydration model is developed, which can be readily applied in geotechnical applications. The aforementioned developments ultimately allow the identification of whether the critical stage in terms of thermo-mechanical behaviour of a thermo-active pile is during its hydration or operation.
Light scattering and surface plasmons on small spherical particles
Creators: name: Fan, Xiaofeng
name: Zheng, Weitao
name: Singh, David J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Light scattering by small particles has a long and interesting history in physics. Nonetheless, it continues to surprise with new insights and applications. This includes new discoveries, such as novel plasmonic effects, as well as exciting theoretical and experimental developments such as optical trapping, anomalous light scattering, optical tweezers, nano-spasers, and novel aspects and realizations of Fano resonances. These have led to important new applications, including several ones in the biomedical area and in sensing techniques at the single-molecule level. There are additionally many potential future applications in optical devices and solar energy technologies. Here we review the fundamental aspects of light scattering by small spherical particles, emphasizing the phenomenological treatments and new developments in this field.
description: 8 figures
Integrated care models for managing and preventing frailty: A systematic review for the European Joint Action on Frailty Prevention (ADVANTAGE JA)
Creators: name: Hendry, Anne
name: Vanhecke, Eliane
name: Carriaz, Ana Maria
name: López-Samaniego, Luz
name: Espinosa, Juan Manuel
name: Sezgin, Duygu
name: O’Donovan, Mark
name: Hammar, Teija
name: Ferry, Peter
name: Vella, Antoine
name: Bacaicoa, Olatz Albaina
name: Braga, Mario
name: Ciutan, Marius
name: Velivasi, Alexandra
name: Lamprini, Koula Maria
name: Van Der Heyden, Johan
name: Liew, Aaron
name: O'Caoimh, Rónán
Publisher: name: Universita' degli Studi di Salerno
Year: 2020
Subjects: Frailty
Models of care
Systematic review
Integrated care

description: Frailty requires concerted integrated approaches to prevent functional decline. Although there is evidence that integrating care is effective for older people, there is insufficient data on outcomes from studies implementing integrated care to prevent and manage frailty. We systematically searched PubMed and Cochrane Library database for peerreviewed medical literature on models of care for frailty, published from 2002 to 2017. We considered the effective and transferable components of the models of care and evidence of economic impact, where available. Information on European Unionfunded projects or those registered with the European Innovation Partnership on Active and Healthy Ageing, and grey literature (including good practices) were also considered. We found 1,065 potential citations and 170 relevant abstracts. After excluding reports on specific diseases, processes or interventions and service models that did not report data, 42 full papers met the inclusion criteria. The evidence showed that few models of integrated care were specifically designed to prevent and tackle frailty in the community and at the interface between primary and secondary (hospital) care. Current evidence supports the case for a more holistic and salutogenic response to frailty, blending a chronic care approach with education, enablement and rehabilitation to optimise function, particularly at times of a sudden deterioration in health, or when transitioning between home, hospital or care home. In all care settings, these approaches should be supported by comprehensive assessment and multidimensional interventions tailored to modifiable physical, psychological, cognitive and social factors.
Persistent local order heterogeneity in the supercritical carbon dioxide
Creators: name: Bolmatov, Dima
name: Zav'yalov, D.
name: Gao, M.
name: Zhernenkov, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The supercritical state is currently viewed as uniform and homogeneous on the pressure-temperature phase diagram in terms of physical properties. Here, we study structural properties of the supercritical carbon dioxide, and discover the existence of persistent medium-range order correlations which make supercritical carbon dioxide non-uniform and heterogeneous on an intermediate length scale, a result not hitherto anticipated. We report on the carbon dioxide heterogeneity shell structure where, in the first shell, both carbon and oxygen atoms experience gas-like type inter- actions with short range order correlations, while within the second shell oxygen atoms essentially exhibit liquid-like type of interactions with medium range order correlations due to localisation of transverse-like phonon packets. We show that the local order heterogeneity remains in the three phase-like equilibrium within very wide temperature range. Importantly, we highlight a catalytic role of atoms inside the nearest neighbor heterogeneity shell in providing a mechanism for diffusion in the supercritical carbon dioxide on an intermediate length scale. Finally, we discuss important implications for answering the intriguing question whether Venus may have had carbon dioxide oceans and urge for an experimental detection of this persistent local order heterogeneity.
description: 5 pages, 6 figures
On the existence of transition layers of spike type in reaction-diffusion-convection equations
Creators: name: Schneider, Klaus R.
name: Vasil´Eva, Adelaida B.
Publisher: name: Weierstrass Institute
Year: 1995
Subjects: subject: Reaction-diffusion-convection equations
subject: contrast structures of spike type
subject: singular perturbations
subject: asymptotic expansions
subject: boundary layer functions
subject: integral manifolds
subject: 35K55
subject: 35B25
subject: 34D15
subject: 34E05

description: We investigate steady state solutions to a class of systems of reaction-diffusion-convection equations with small diffusion and small convection, and which depend on one space variable. Our main concern is to prove the existence of a solution with an interior layer of spike type for higher order systems without taking into consideration the influence of boundary conditions. To this end we combine two methods of the theory of singular perturbations: the method of integral manifolds and the method of boundary layer functions.
title: Μεθοδολογικό πλαίσιο χωροχρονικής ανάλυσης της οικοδομικής δραστηριότητας: η δεκαετία 2000-2009 στην Ελλάδα
titleType: AlternativeTitle
Creators: name: Κοντοκώστα, Χριστιάνα Χ.
Publisher: name: University of Thessaly
Year: 2012
Subjects: subject: ΟΙΚΟΔΟΜΙΚΗ -- ΕΛΛΑΔΑ
subject: ΣΤΕΓΑΣΗ -- ΕΛΛΑΔΑ
subject: ΓΕΩΓΡΑΦΙΚΑ ΣΥΣΤΗΜΑΤΑ ΠΛΗΡΟΦΟΡΙΩΝ (GIS)

description: Σημείωση: διατίθεται συμπληρωματικό υλικό σε ξεχωριστό αρχείο.
Neumann, Veit / Kreiml, Josef (Hg.): Konzil und Medien Über den Glauben reden in einer veränderten Welt
Creators: name: Müller, Helmut
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 30 Nr. 1 (2014): Forum Katholische Theologie, Band 30, Heft 1
MUSE observations of the lensing cluster SMACSJ2031.8-4036: new constraints on the mass distribution in the cluster core
Creators: name: Richard, J.
name: Patricio, V.
name: Martinez, J.
name: Bacon, R.
name: Clement, B.
name: Weilbacher, P.
name: Soto, K.
name: Wisotzki, L.
name: Vernet, J.
name: Pello, R.
name: Schaye, J.
name: Turner, M.
name: Martinsson, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present new observations of the lensing cluster SMACSJ2031.8-4036 obtained with the MUSE integral field spectrograph as part of its commissioning on the Very Large Telescope. By providing medium-resolution spectroscopy over the full 4750-9350 Angstroms domain and a 1x1 arcmin2 field of view, MUSE is ideally suited for identifying lensed galaxies in the cluster core, in particular multiple-imaged systems. We perform a redshift analysis of all sources in the datacube and identify a total of 12 systems ranging from $z=1.46$ to $z=6.4$, with all images of each system confirmed by a spectroscopic redshift. This allows us to accurately constrain the cluster mass profile in this region. We foresee that future MUSE observations of cluster cores should help us discover very faint Lyman-alpha emitters thanks to the strong magnification and the high sensitivity of this instrument.
description: Accepted for publication in MNRAS letters. 5 pages, 4 figures, 2 tables
Sindacato di meritevolezza degli interessi perseguiti ed equilibrio delle prestazioni nel contratto di assicurazione claims made
Creators: name: Mugavero, Rosa
Publisher: name: Universita degli studi di Salerno
Year: 2018
Subjects: subject: IUS/04 DIRITTO COMMERCIALE
subject: Meritevolezza
subject: Equilibrio
subject: Claims made

description: 2016 - 2017
description: The doctoral thesis starts from a complete reconstruction of the normative development that the civil liability insurance contract has adapted to the needs of the production systems of the most advanced economies. The survey develops around the structure of the made claims clauses, the role of private autonomy, their impact on insurable risk, as well as on the advantages and contraindications for companies and for policyholders. The second chapter handles the question of the validity of the clauses made by reviewing the precise objections to the main objections of nullity. The analysis also deals with the problem of the typicality of the insurance contract in the current domestic and international regulatory context. This problem is linked to that of the cause in concrete terms and the limits of the automatic substitution of the clauses considered null, where the jurisprudence of the Court of Cassation plays an important role. The third chapter deals with the profiles of merit and contractual balance. The work is structured through a detailed examination of the various doctrinal positions advanced on the point, to arrive at the numerous jurisprudential rulings that in various sectors of bargaining have dealt with the scope of application of the art. 1322, paragraph 2, c.c. Among these, of great importance was the sentence of the United Sections of 6 May 2016, n. 9140, both for the exegetical ideas offered regarding the merit of the claims made clauses, and for the disorientation that has determined on the subsequent jurisprudence that has applied these parameters. In conclusion, the last chapter is dedicated to the regulation of the most sensitive sectors (of which the critical issues and inconsistencies are showed) and the most recent sentences, put into question by the order of the Court of 2018, which expresses multiple concerns. [edited by Author]
Controlled-source electromagnetic modelling using high order finite-difference time-domain method on a nonuniform grid
Creators: name: Yang, Pengliang
name: Mittet, Rune
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Simulation of 3D low-frequency electromagnetic fields propagating in the Earth is computationally expensive. We present a fictitious wave domain high-order finite-difference time-domain (FDTD) modelling method on nonuniform grids to compute frequency-domain 3D controlled-source electromagnetic (CSEM) data. The method overcomes the inconsistency issue widely present in the conventional 2nd order staggered grid finite difference scheme over nonuniform grid, achieving high accuracy with arbitrarily high order scheme. The finite-difference coefficients adaptive to the node spacings, can be accurately computed by inverting a Vandermonde matrix system using efficient algorithm. A generic stability condition applicable to nonuniform grids is established, revealing the dependence of the time step and these finite-difference coefficients. A recursion scheme using fixed point iterations is designed to determine the stretching factor to generate the optimal nonuniform grid. The grid stretching in our method reduces the number of grid points required in the discretization, making it more efficient than the standard high-order FDTD with a densely sampled uniform grid. Instead of stretching in both vertical and horizontal directions, better accuracy of our method is observed when the grid is stretched along the depth without horizontal stretching. The efficiency and accuracy of our method are demonstrated by numerical examples.
Bibliographie von Prof. Dr. phil. Lic. theol. Lic. iur. can. Kurt Krenn emeritierter Diöszesanbischof von St. Pölten (28. Juni 1936 - 25. Januar 2014), 1
Creators: name: Rothe, Wolfgang F.
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 30 Nr. 1 (2014): Forum Katholische Theologie, Band 30, Heft 1
Symmetry breaking in dynamical systems
Creators: name: Lauterbach, Reiner
Publisher: name: Weierstrass Institute
Year: 1995

description: Symmetry breaking bifurcations and dynamical systems have obtained a lot of attention over the last years. This has several reasons: real world applications give rise to systems with symmetry, steady state solutions and periodic orbits may have interesting patterns, symmetry changes the notion of structural stability and introduces degeneracies into the systems as well as geometric simplifications. Therefore symmetric systems are attractive to those who study specific applications as well as to those who are interested in a the abstract theory of dynamical systems. Dynamical systems fall into two classes, those with continuous time and those with discrete time. In this paper we study only the continuous case, although the discrete case is as interesting as the continuous one. Many global results were obtained for the discrete case. Our emphasis are heteroclinic cycles and some mechanisms to create them. We do not pursue the question of stability. Of course many studies have been made to give conditions which imply the existence and stability of such cycles. In contrast to systems without symmetry heteroclinic cycles can be structurally stable in the symmetric case. Sometimes the various solutions on the cycle get mapped onto each other by group elements. Then this cycle will reduce to a homoclinic orbit if we project the equation onto the orbit space. Therefore techniques to study homoclinic bifurcations become available. In recent years some efforts have been made to understand the behaviour of dynamical systems near points where the symmetry of the system was perturbed by outside influences. This can lead to very complicated dynamical behaviour, as was pointed out by several authors. We will discuss some of the technical difficulties which arise in these problems. Then we will review some recent results on a geometric approach to this problem near steady state bifurcation points.
Extrinsic to intrinsic mechanism crossover of anomalous Hall effect in the Ir-doped MnPtSn Heusler system
Creators: name: Jamaluddin, Sk
name: Roy, Roumita
name: Das, Amitabh
name: Kanungo, Sudipta
name: Nayak, Ajaya K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent findings of large anomalous Hall signal in nonferromagnetic and nonferrimagnetic materials suggest that the magnetization of the system is not a critical component for the realization of the anomalous Hall effect (AHE). Here, we present a combined theoretical and experimental study demonstrating the evolution of different mechanisms of AHE in a cubic Heusler system MnPt$_{1-x}$Ir$_x$Sn. With the help of magnetization and neutron diffraction studies, we show that the substitution of nonmagnetic Ir in place of Pt significantly reduces the net magnetic moment from 4.17 $ μ_B$/f.u. in MnPtSn to 2.78 $ μ_B$/f.u. for MnPt$_{0.5}$Ir$_{0.5}$Sn. In contrast, the anomalous Hall resistivity is enhanced by nearly three times from 1.6 $ μΩ$ cm in MnPtSn to about 5 $ μΩ$ cm for MnPt$_{0.5}$Ir$_{0.5}$Sn. The power law analysis of the Hall resistivity data suggests that the extrinsic contribution of AHE that dominates in the case of the parent MnPtSn almost vanishes for MnPt$_{0.5}$Ir$_{0.5}$Sn, where the intrinsic mechanism plays the major role. The experimental results are well supported by our theoretical study, which shows a considerable enhancement of the spin-orbit coupling when Ir is introduced into the system. Our finding of a crossover of the anomalous Hall effect with chemical engineering is a major contribution toward the recent interest in controlling the band topology of topological materials, both in bulk and thin-film forms.
description: Published in Physical Review B
Additional file 1 of Advertisement of unhealthy commodities in Bristol and South Gloucestershire and rationale for a new advertisement policy
Creators: name: Scott, Lauren J.
name: Nobles, James
name: Sillero-Rejon, Carlos
name: Brockman, Rowan
name: Toumpakari, Zoi
name: Jago, Russell
name: Cummins, Steven
name: Blake, Sarah
name: Horwood, Jeremy
name: de Vocht, Frank
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Table S1. Stakeholder topic guide. Table S2. Survey questions HFSS, alcohol and gambling modules. Table S3. Self-reported exposure to different types of adverts by respondent characteristics.
PSR J1953+1844 probably being the descendant of an Ultra-compact X-ray binary
Creators: name: Yang, Z. L.
name: Han, J. L.
name: Jing, W. C.
name: Su, W. Q.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: PSR J1953+1844 (i.e., M71E) is a millisecond pulsar (MSP)in a 53 minute binary orbit discovered by the Five-hundred-meter Aperture Spherical radio Telescope. The mass function from pulsar timing is $2.3\times10^{-7}$ $M_\odot$. The possible redback origin of this system has been discussed by Pan et al. We discuss here an alternative evolution track for this binary system, namely that PSR J1953+1844 is a descendant of an ultra-compact X-ray binary (UCXB), which has a hydrogen-poor donor accreting onto a neutron star (NS) with an orbital period of $\leq1$ hr. We noticed that some of UCXB systems hold an accreting millisecond X-ray pulsars (AMXPs) and a donor with a mass of about 0.01 M$_\odot$. M71E has a very similar orbit to those of AMXPs, indicating that it might be evolved from a UCXB similar to PSR J1653--0158. The companion star of M71E should be significantly bloated and it most probably has a carbon and oxygen composition, otherwise a low inclination angle of the orbit is required for a helium companion. The discovery of this M71E binary system may shed light on when and how an NS in a UCXBs turns into a radio pulsar.
description: Accepted for publication in ApJL. 5 pages, 2 figures
Some more notions of homomorphism-homogeneity
Creators: name: Lockett, Deborah
name: Truss, John K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C99

description: We extend the notion of 'homomorphism-homogeneity' to a wider class of kinds of maps than previously studied, and we investigate the relations between the resulting notions of homomorphism-homogeneity, giving several examples. We also give further details on related work reported in [Deborah Lockett and John K Truss, Generic endomorphisms of homogeneous structures, in 'Groups and model theory', Contemporary Mathematics 576, ed Strungmann, Droste, Fuchs, Tent, American Mathematical Society, 2012, 217-237] about the endomorphisms of chains and generic endomorphisms of tree.
description: 15 pages
Additional file 1 of “I just get scared it’s going to happen again”: a qualitative study of the psychosocial impact of pediatric burns from the child’s perspective
Creators: name: Woolard, Alix
name: Wickens, Nicole
name: McGivern, Lisa
name: de Gouveia Belinelo, Patricia
name: Martin, Lisa
name: Wood, Fiona
name: Janse van Rensburg, Elmie
name: Milroy, Helen
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Supplementary Material 1
Electronic spectrum and optical properties of Y-shaped Kekule-patterned graphene: Band nesting resonance as an optical signature
Creators: name: Mohammadi, Yawar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Employing tight-binding model we investigate the effects of a uniform Y-shaped Kekule lattice distortion on the electronic spectrum and optical conductivity of graphene. We derive a low-energy effective Hamiltonian which is found to be in excellent agreement with one calculated from a diagonalization of the full tight-binding Hamiltonian. Then using the low-energy Hamiltonian and Kubo formula we obtain an analytical expression for the real part of the optical conductivity used to explore the effects of chemical potential, temperature and on-site and hopping energy deviations in details. In particular we find that Y-shaped Kekue-patterned graphene at finite chemical potential displays a large optical response called band nesting resonance. This effect is shown to be robust against increasing temperature, facilitating its detection as an optical signature for the Y-shaped Kekule distortion even at room temperature.
description: 21 pages, 7 figures
Asymptotic Equivalence of Density Estimation and Gaussian White Noise
Creators: name: Nussbaum, Michael
Publisher: name: Weierstrass Institute
Year: 1995
Subjects: subject: Nonparametric experiments
subject: deficiency distance
subject: likelihood process
subject: Hungarian construction
subject: asymptotic minimax risk
subject: curve estimation
subject: 62G07
subject: 62B15
subject: 62G20

description: Signal recovery in Gaussian white noise with variance tending to zero has served for some time as a representative model for nonparametric curve estimation, having all the essential traits in a pure form. The equivalence has mostly been stated informally, but an approximation in the sense of Le Cam's deficiency distance Δ would make it precise. The models are then asymptotically equivalent for all purposes of statistical decision with bounded loss. In nonparametrics, a first result of this kind has recently been established for Gaussian regression (Brown and Low, 1993). We consider the analogous problem for the experiment given by n i. i. d. observations having density ƒ on the unit interval. Our basic result concerns the parameter space of densities which are in a Hölder ball with exponent α > 1/2 and and which are uniformly bounded away from zero. We show that an i. i. d. sample of size n with density ƒ is globally asymptotically equivalent to a white noise experiment with drift ƒ 1/2 and variance 1/4 n -1. This represents a nonparametric analog of Le Cam's heteroscedastic Gaussian approximation in the finite dimensional case. The proof utilizes empirical process techniques related to the Hungarian construction. White noise models on ƒ and log ƒ are also considered, allowing for various "automatic" asymptotic risk bounds in the i. i. d. model from white noise. As first applications we discuss exact constants for L2 and Hellinger loss.
Das Geheimnis der Eucharistie in der systematischen Theologie Matthias Joseph Scheebens
Creators: name: Stickelbroeck, Michael
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 30 Nr. 1 (2014): Forum Katholische Theologie, Band 30, Heft 1
Multiscale analysis and damage tolerance of carbon fibre biaxial non-crimp-fabric composites
Creators: name: Yin, Han
Publisher: name: Imperial College London
Year: 2022

description: Composite materials are attractive in aerospace and automotive applications due to their high stiffness-to-weight ratios. Non-crimp-fabric (NCF) reinforced composites have been receiving attention in the composite market due to their cost-effectiveness and excellent mechanical performance. However, compared to traditional unidirectional laminates (UD), NCF composites have different mechanical behaviours due to their heterogeneous internal structures. The ability to predict the mechanical performance of NCF composites is necessary for a robust and reliable design. The objective of this PhD research was to develop numerical methods to predict the in-plane mechanical behaviour and damage tolerance of the carbon fibre reinforced biaxial NCF composites. The in-plane mechanical behaviours of NCF composites were investigated at different scales by conducting multiscale analyses in the LS-DYNA finite element (FE) software. The macroscopical FE modelling results were validated by a series of in-plane characterisation tests of biaxial NCF composites. The compression-after-impact (CAI) test was adopted to assess the damage tolerance of the composite laminates. The complex failure mechanisms of NCF composites involved in a CAI failure process were comprehensively studied by experimental methods. The experimental results contributed to the validation of FE models to predict the low-velocity impact (LVI) and CAI behaviours of NCF composites in LS-DYNA. Furthermore, different laminate designs were employed to change the CAI behaviour of NCF composites by altering layup sequence and ply-level hybridisation. An optimised scheme was proposed to enhance the CAI behaviour of NCF composites, providing a practical guide to damage tolerance design.
Mean cover time of one-dimensional persistent random walks
Creators: name: Chupeau, Marie
name: Bénichou, Olivier
name: Voituriez, Raphaël
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The cover time is defined as the time needed for a random walker to visit every site of a confined domain. Here, we focus on persistent random walks, which provide a minimal model of random walks with short range memory. We derive the exact expression of the mean cover time of a one-dimensional lattice by such a persistent random walk, both for periodic and reflecting boundary conditions.
description: To appear in Phys. Rev. E
An Empirical Study of AI Generated Text Detection Tools
Creators: name: Akram, Arslan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.6; I.2.7
subject: 53

description: Since ChatGPT has emerged as a major AIGC model, providing high-quality responses across a wide range of applications (including software development and maintenance), it has attracted much interest from many individuals. ChatGPT has great promise, but there are serious problems that might arise from its misuse, especially in the realms of education and public safety. Several AIGC detectors are available, and they have all been tested on genuine text. However, more study is needed to see how effective they are for multi-domain ChatGPT material. This study aims to fill this need by creating a multi-domain dataset for testing the state-of-the-art APIs and tools for detecting artificially generated information used by universities and other research institutions. A large dataset consisting of articles, abstracts, stories, news, and product reviews was created for this study. The second step is to use the newly created dataset to put six tools through their paces. Six different artificial intelligence (AI) text identification systems, including "GPTkit," "GPTZero," "Originality," "Sapling," "Writer," and "Zylalab," have accuracy rates between 55.29 and 97.0%. Although all the tools fared well in the evaluations, originality was particularly effective across the board.
description: 15 Pages, 4 Figures, 2 Tables, 42 References
On linear independence of Dirichlet $L$ values
Creators: name: Gun, Sanoli
name: Kandhil, Neelam
name: Philippon, Patrice
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J72, 11R18, 11M06

description: The study of linear independence of $L(k, χ)$ for a fixed integer $k>1$ and varying $χ$ depends critically on the parity of $k$ vis-à-vis $χ$. This has been investigated by a number of authors for Dirichlet characters $χ$ of a fixed modulus and having the same parity as $k$.The focal point of this article is to extend this investigation to families of Dirichlet characters modulo distinct pairwise co-prime natural numbers. The interplay between the resulting ambient number fields brings in new technical issues and complications hitherto absent in the context of a fixed modulus (consequently a single number field lurking in the background). This entails a very careful and hands-on dealing with the arithmetic of compositum of number fields which we undertake in this work. Our results extend earlier works of the first author with Murty-Rath as well as works of Okada, Murty-Saradha and Hamahata.
description: 20 pages
Higher order coercive inequalities and Poincare’s constants
Creators: name: Wang, Yifu
Publisher: name: Imperial College London
Year: 2021

description: In this thesis we discuss three projects: the optimal constant for Poincar´e’s inequality, the isoperimetric problem for Poincar´e’s constant, and the revised Adam’s inequality with its applications to Orlicz-Sobolev embeddings.
Catalog of Isolated Emission Episodes in Gamma-ray Bursts from Fermi, Swift and BATSE
Creators: name: Charisi, Maria
name: Marka, Szabolcs
name: Bartos, Imre
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report a comprehensive catalog of emission episodes within long gamma-ray bursts (GRBs) that are separated by a quiescent period during which gamma-ray emission falls below the background level. We use a fully automated identification method for an unbiased, large scale and expandable search. We examine a comprehensive sample of long GRBs from the BATSE, Swift and Fermi missions, assembling a total searched set of 2710 GRBs, the largest catalog of isolated emission episodes so far. Our search extends out to [-1000s,750s] around the burst trigger, expanding the covered time interval beyond previous studies and far beyond the nominal durations (T90) of most bursts. We compare our results to previous works by identifying pre-peak emission (or precursors), defined as isolated emission periods prior to the episode with the highest peak luminosity of the burst. We also systematically search for similarly defined periods after the burst's peak emission. We find that the pre-peak and post-peak emission periods are statistically similar, possibly indicating a common origin. For the analyzed GRBs, we identify 24% to have more than one isolated emission episode, with 11% having at least one pre-peak event and 15% having at least one post-peak event. We identify GRB activity significantly beyond their T90, which can be important for understanding the central engine activity as well as, e.g., gravitational-wave searches.
Distinguishing AGN Feedback Models with the Thermal Sunyaev-Zel'dovich Effect
Creators: name: Grayson, Skylar
name: Scannapieco, Evan
name: Davé, Romeel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Current models of galaxy formation require strong feedback from active galactic nuclei (AGN) to explain the observed lack of star formation in massive galaxies since z~2 but direct evidence of this energy input is limited. We use the SIMBA cosmological galaxy formation simulations to assess the ability of thermal Sunyaev-Zel'dovich (tSZ) measurements to provide such evidence, by mapping the pressure structure of the circumgalactic medium around massive z~0.2-1.5 galaxies. We undertake a stacking approach to calculate the total tSZ signal and its radial profile in simulations with varying assumptions of AGN feedback, and we assess its observability with current and future telescopes. By convolving our predictions with the 2.1' beam of the Atacama Cosmology Telescope (ACT), we show that current observations at z~1 are consistent with SIMBA's fiducial treatment of AGN feedback, and inconsistent with SIMBA models without feedback. At z~0.5, observational signals lie between SIMBA run with and without AGN feedback, suggesting AGN in SIMBA may inject too much energy at late times. By convolving our data with a 9.5'' beam corresponding to the TolTEC camera on the Large Millimeter Telescope Alfonso Serrano (LMT), we predict a unique profile for AGN feedback that can be distinguished with future higher-resolution measurements. Finally, we explore a novel approach to quantify the non-spherically symmetric features surrounding our galaxies by plotting radial profiles representing the component of the stack with m-fold symmetry.
description: 16 pages, 13 figures, 3 tables. Accepted by ApJ
On the application of Jacobian-free Riemann solvers for relativistic radiation magnetohydrodynamics under M1 closure
Creators: name: López-Miralles, Jose
name: Martí, Jose María
name: Perucho, Manel
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Radiative transfer plays a major role in high-energy astrophysics. In multiple scenarios and in a broad range of energy scales, the coupling between matter and radiation is essential to understand the interplay between theory, observations and numerical simulations. In this paper, we present a novel scheme for solving the equations of radiation relativistic magnetohydrodynamics within the parallel code Lóstrego. These equations, which are formulated taking successive moments of the Boltzmann radiative transfer equation, are solved under the gray-body approximation and the M1 closure using an IMEX time integration scheme. The main novelty of our scheme is that we introduce for the first time in the context of radiation magnetohydrodynamics a family of Jacobian-free Riemann solvers based on internal approximations to the Polynomial Viscosity Matrix, which were demonstrated to be robust and accurate for non-radiative applications. The robustness and the limitations of the new algorithms are tested by solving a collection of one-dimensional and multi-dimensional test problems, both in the free-streaming and in the diffusion radiation transport limits. Due to its stable performance, the applicability of the scheme presented in this paper to real astrophysical scenarios in high-energy astrophysics is promising. In future simulations, we expect to be able to explore the dynamical relevance of photon-matter interactions in the context of relativistic jets and accretion discs, from microquasars and AGN to gamma-ray bursts.
description: 21 pages, 13 figures. Accepted for publication in Computer Physics Communications
Exploring the impact of food product reformulation on population food choice and diet quality
Creators: name: Gressier, Mathilde
Publisher: name: Imperial College London
Year: 2022

description: Background Poor dietary habits have been recognized as playing a major role in non-communicable diseases. To improve population dietary intake, governments use food reformulation policies aimed at improving the nutrient profile of foods. This thesis aims at understanding how populations and individuals respond to the reformulation of foods. Methods Two types of data were used to analyse responses to food reformulation in the UK. The National Diet and Nutrition Survey was used to study the changes in dietary intakes following salt and fibre reformulations. Panels of household purchase were used to study households’ responses to sugar reformulation. Adjusted time trends were used to study changes over time. A decomposition method was used to understand how changes in the nutrient density of foods consumed or purchased can be explained by changes in consumer demand for, and supply of, foods. Results Food reformulation was linked to improved dietary intake or purchase. These improvements were rather small, but similar across socio-demographic groups. The different decomposition analyses showed that the change in the nutrient density of foods purchased or consumed came mostly from supply-driven effects. Changes in consumer choices had a marginal mean effect, except in the presence of a tax. Further, the extent to which households consumed reformulated products did not influence their change in sugar purchases. Lastly, stronger incentives such as taxes were more effective in promoting reformulation than voluntary initiatives. Conclusions Reformulating foods leads to improved dietary intake. Despite being small, these improvements are not negligible and don’t widen existing disparities. Taxing unhealthy products produced a change in consumer food choices, while it did not happen in the absence of such taxes. Given the gap between current and recommended dietary intake, policies to incentivise reformulation should be used alongside other policies aimed at improving food choices at the population level.
Additional file 2 of “I just get scared it’s going to happen again”: a qualitative study of the psychosocial impact of pediatric burns from the child’s perspective
Creators: name: Woolard, Alix
name: Wickens, Nicole
name: McGivern, Lisa
name: de Gouveia Belinelo, Patricia
name: Martin, Lisa
name: Wood, Fiona
name: Janse van Rensburg, Elmie
name: Milroy, Helen
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Supplementary Material 2
Neumann, Veit (Hg.): Woher? Wohin? Chancen der Katholischen Universität Eichstätt-Ingolstadt
Creators: name: Kreiml, Josef
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 29 Nr. 4 (2013): Forum Katholische Theologie, Band 29, Heft 4
Storytelling, Memory, Theatre
Creators: name: Molinari, Cesare
Publisher: name: Journal of Early Modern Studies
Year: 2018

description: In the history of Western civilisation, the spread of writing, followed by the book, obviously did not entirely replace oral culture and communication, but led to the development of a dialectic relationship, especially in the sense that memory underwent a gradual shift away from the human mind, where it tended to limit itself to recalling necessary notions and facts stored in documents, books, and, more recently, in audiovisual recordings and electronic databases. The article foregrounds the most important aspects of this process by means of a series of especially significant examples in the relationship between words and other means of expression and communication by the human body.
description: Journal of Early Modern Studies, Vol 7 (2018)
Natural differential invariants and equivalence of third order nonlinear differential operators
Creators: name: Lychagin, Valentin
name: Yumaguzhin, Valeriy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 47F05

description: We give a description of the field of rational natural differential invariants for a class of nonlinear differential operators of the third order on a two dimensional manifold and show their application to the equivalence problem of such operators.
description: 14 pages
Georg Sölls Beurteilung der Mariologie des Zweiten Vatikanums
Creators: name: Ziegenaus, Anton
name: Söll, Georg
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 29 Nr. 4 (2013): Forum Katholische Theologie, Band 29, Heft 4