cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Conductance spectroscopy of a correlated superconductor in a magnetic field in the Pauli limit: Evidence for strong correlations
Creators: name: Kaczmarczyk, Jan
name: Sadzikowski, Mariusz
name: Spałek, Jozef
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study conductance spectroscopy of a two-dimensional junction between a normal metal and a strongly-correlated superconductor in an applied magnetic field in the Pauli limit. Depending on the field strength the superconductor is either in the Bardeen-Cooper-Schrieffer (BCS), or in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state of the Fulde-Ferrell (FF) type. The strong correlations are accounted for by means of the Gutzwiller method what leads naturally to the emergence of the spin-dependent masses (SDM) of quasiparticles when the system is spin-polarized. The case without strong correlations (with the spin-independent masses, SIM) is analyzed for comparison. We consider both the s-wave and the d-wave symmetries of the superconducting gap and concentrate on the parallel orientation of the Cooper pair momentum Q with respect to the junction interface. The junction conductance is presented for selected barrier strengths (i.e., in the contact, intermediate, and tunneling limits). The conductance spectra in the cases with and without strong correlations differ essentially. Our analysis provides thus an experimentally accessible test for the presence of strong-correlations in the superconducting state. Namely, correlations alter the distance between the conductance peaks (or related conductance features) for carriers with spin-up and spin-down. In the uncorrelated case, this distance is twice the Zeeman energy. In the correlated case, the corresponding distance is about 30-50% smaller, but other models may provide even stronger difference, depending on details of the system electronic structure. It turns out that the strong correlations manifest themselves most clearly in the case of the junction with the BCS, rather than the FFLO superconductor, what should make the experimental verification of the present results simpler.
description: 28 pages, 9 figures, accepted in Phys. Rev. B
Repos4Chem - criteria for acquisition - for suggestion by NFDI4Chem for data providers
Creators: name: Bonatto Minella, Christian
name: Bach, Felix
name: Jolliffe, John D.
name: Fischer, Tillmann G.
Publisher: name: Zenodo
Year: 2023
Subjects: Research Data Management, FAIR, Repositories

description: A list of criteria for the selection of repositories relevant to the chemistry community has been developed. Repositories will be assessed on their maturity with respect to secure and sustainable operations, reliable data publication and long-term data preservation and accessibility. They should meet the selected requirements and recommendations and, if they do not yet do so, declare their willingness to meet the other missing requirements.

These repositories will be recommended in an article to be published in the NFDI4Chem Knowledge Base: the article will serve as a guide for repository managers to understand what criteria need to be met in order to be included in the NFDI4Chem repository federation. The criteria were categorised into mandatory, recommended and optional.
Papaloizou-Pringle Instability of Magnetized Accretion Tori
Creators: name: Fu, Wen
name: Lai, Dong
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Hot accretion tori around a compact object are known to be susceptible to a global hydrodynamical instability, the so-called Papaloizou-Pringle (PP) instability, arising from the interaction of non-axisymmetric waves across the corotation radius, where the wave pattern speed matches the fluid rotation rate. However, accretion tori produced in various astrophysical situations (e.g., collapsars and neutron star binary mergers) are likely to be highly magnetized. We study the effect of magnetic fields on the PP instability in incompressible tori with various magnetic strengths and structures. In general, toroidal magnetic fields have significant effects on the PP instability: For thin tori (with the fractional width relative to the outer torus radius much less than unity), the instability is suppressed at large field strengths with the corresponding toroidal Alfven speed $v_{Aϕ}\go 0.2rΩ$ (where $Ω$ is the flow rotation rate). For thicker tori (with the fractional width of order 0.4 or larger), which are hydrodynamically stable, the instability sets in for sufficiently strong magnetic fields (with $v_{Aϕ}\go 0.2 rΩ$). Our results suggest that highly magnetized accretion tori may be subjected to global instability even when it is stable against the usual magneto-rotational instability.
description: 15 pages, 10 figures, MNRAS accepted
Casimir effect from macroscopic quantum electrodynamics
Creators: name: Philbin, T. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The canonical quantization of macroscopic electromagnetism was recently presented in New J. Phys. 12 (2010) 123008. This theory is here used to derive the Casimir effect, by considering the special case of thermal and zero-point fields. The stress-energy-momentum tensor of the canonical theory follows from Noether's theorem, and its electromagnetic part in thermal equilibrium gives the Casimir energy density and stress tensor. The results hold for arbitrary inhomogeneous magnetodielectrics and are obtained from a rigorous quantization of electromagnetism in dispersive, dissipative media. Continuing doubts about the status of the standard Lifshitz theory as a proper quantum treatment of Casimir forces do not apply to the derivation given here. Moreover, the correct expressions for the Casimir energy density and stress tensor inside media follow automatically from the simple restriction to thermal equilibrium, without the need for complicated thermodynamical or mechanical arguments.
description: Minor corrections. 21 pages. To appear in New J. Phys
Impact of Publishing and Citing Open Access Papers on Researchers' Scientific Success
Creators: name: Momeni, Fakhri
name: Mayr, Philipp
name: Fraser, Nicholas
name: Peters, Isabella
Publisher: name: Zenodo
Year: 2021
Subjects: Open Access
Citation Analysis
Closed Access

description: The scientific publishing market suffers from injustice in several regards. Interestingly, traces of injustice can be found in both open-access (OA) and closed-access (CA) publishing-models.
 The OA-model makes scientific literature freely accessible for all scholars - but, the costs of publishing have to be assumed by somebody (e.g. the authors via APCs). This, however, may not be possible for authors who do not benefit from financial support for OA-publishing. In succession, such authors cannot publish in the OA-model (instead they must turn to the CA-model) and cannot profit from the citation advantage that was shown for many OA-articles [1]. Researchers (at institutions) who are not able to maintain subscriptions to CA-publications suffer from the CA-model as it builds a barrier to access the required resources. This may result in falling behind the state of the art in the field which along with it may negatively affect future publication success in outlets of high reputation.
 This study (conducted with data from Scopus and Unpaywall) will research the effect on researchers’ scientific success grounded in the unfairness of both publishing models. We aim to answer three questions. First, is there any limitation for a group of researchers (e.g. from different countries, career stages, career positions) to cite the CA-papers? Second, is there any limitation for researchers to publish in the OA-model and receiving citations? To answer these questions, we try to find the relationship between the groups that researchers belong to and the tendency to cite/publish in the OA- or CA-model. Third, to what extent do these limitations affect the scientific success of scholars? We assess scientific success by comparing the receiving citations for each group. We expect that the tendency to cite OA- and publish CA-articles affects the scientific success of scholars negatively.
 [1] Matheka et al. https://doi.org/10.1186/1744-8603-10-26
Algebraic Notions of Termination
Creators: name: Jules, Desharnais
name: Moeller, Bernhard
name: Georg, Struth
Publisher: name: arXiv
Year: 2010
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.3.1, F.3.2, F.4.1

description: Five algebraic notions of termination are formalised, analysed and compared: wellfoundedness or Noetherity, Löb's formula, absence of infinite iteration, absence of divergence and normalisation. The study is based on modal semirings, which are additively idempotent semirings with forward and backward modal operators. To model infinite behaviours, idempotent semirings are extended to divergence semirings, divergence Kleene algebras and omega algebras. The resulting notions and techniques are used in calculational proofs of classical theorems of rewriting theory. These applications show that modal semirings are powerful tools for reasoning algebraically about the finite and infinite dynamics of programs and transition systems.
description: 29 pages
Dynamical light vector mesons in low-energy scattering of Goldstone bosons
Creators: name: Danilkin, I. V.
name: Gil, L. I. R.
name: Lutz, M. F. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a study of Goldstone boson scattering based on the flavor SU(3) chiral Lagrangian formulated with vector mesons in the tensor field representation. A coupled-channel channel computation is confronted with the empirical s- and p-wave phase shifts, where good agreement with the data set is obtained up to about 1.2 GeV. There are two relevant free parameters only, the chiral limit value of the pion decay constant and the coupling constant characterizing the decay of the rho meson into a pair of pions. We apply a recently suggested approach that implements constraints from micro- causality and coupled-channel unitarity. Generalized potentials are obtained from the chiral Lagrangian and are expanded in terms of suitably constructed conformal variables. The partial-wave scattering amplitudes are defined as solutions of non-linear integral equations that are solved by means of an N/D ansatz.
description: 15 pages, 8 figures, typos corrected, accepted for publication in Physics Letters B
A pedagogical analysis of Dvorak’s Cello Concerto in B Minor, Op. 104
Creators: name: Bian, Zhuojun
Publisher: name: University of British Columbia
Year: 2017

description: I first heard Antonin Dvorak’s Cello Concerto in B Minor, Op. 104 when I was 13 years old. It was a memorable experience for me, and I was struck by the melodies, the power, and the emotion in the work. As I became more familiar with the piece I came to understand that it holds a significant position in the cello repertory. It has been praised extensively by cellists, conductors, composers, and audiences, and is one of the most frequently performed cello concertos since it was premiered by the English cellist Leo Stern in London on March 19th, 1896, with Dvorak himself conducting the Philharmonic Society Orchestra. In this document I provide a pedagogical method as a practical guide for students and cello teachers who are planning on learning this concerto. Using a variety of historical sources, I provide a comprehensive understanding of some of the technical challenges presented by this work and I propose creative and effective methods for conquering these challenges. Most current studies of Dvorak’s concerto are devoted to the analysis of its structure, melody, harmony, rhythm, texture, instrumentation, and orchestration. Unlike those studies, this thesis investigates etudes and student concertos that were both precursors to – and contemporary with – Dvorak’s concerto. Through an understanding of those works I present an approach that will assist players in achieving high technical and artistic standards for their own performances of the concerto. To do this, I focus on the methodological and technical aspects of cello playing in the concerto, exploring the history of cello techniques up to Dvorak’s time, and examining the contribution of Hanus Wihan to the composition of the concerto. I also explain the methodological and pedagogical value of cello exercises and repertoire that existed before and during Dvorak’s time, and show how those contributed to the development of techniques required for the performance of the concerto. Specific excepts are analyzed with reference to left- and right-hand cello techniques as found in the concerto, and strategies and explicit repertoire for developing these techniques are discussed.
FUNGAL DISEASE OF VINE AND CHEMICAL AGAINST IT EFFECTIVE WAYS TO FIGHT WITH SUBSTANCES
Creators: name: Saitkulov, Foziljon
name: Ibragimov, Bo'ronboy
name: Ismoilova, Umida
Publisher: name: Zenodo
Year: 2023

description: To prevent the fight against this disease, it is necessary to carry out agrotechnical measures - planting healthy seedlings, raising the vine bushes to the sori, giving phosphorus and potassium fertilizers to the vineyards, carrying out the first (before flowering) and second (after flowering) pruning of the vine in time.
title: DISCOVERY AND DEVELOPMENT OF NOVEL PARASITIC NEMATODES TO CONTROL SLUGS IN AGRICULTURE
Creators: name: Cutler, J
Publisher: name: Liverpool John Moores University
Year: 2022

description: Terrestrial gastropods are highly pestiferous and pose a significant global threat to sustainable agriculture, horticulture and floriculture. Current control methods rely on metaldehyde formulated bait pellets. However, metaldehyde can harm non target organisms and cause environmental pollution. Metaldehyde is also due to be banned for use in the UK by 2022. A viable alternative is the gastropod parasitic nematode Phasmarhabditis hermaphrodita, which has been formulated into a biological control agent (Nemaslug®) by BASF Agricultural Specialities. However, the same strain of P. hermaphrodita (DMG0001) has been produced in an artificial environment for over 25 years and research suggests this strain is losing beneficial traits (e.g. virulence and host finding) and failing to provide protection against slug damage. The primary aim of this thesis was to use a collection of wild isolated Phas marhabditis species (P. hermaphrodita, P. neopapillosa and P. californica) to investigate whether they are more virulent than the commercial strain of P. hermaphrodita (DMG0001) to the pestiferous slug Deroceras invadens and the snail Cornu aspersum in laboratory experiments. Host feeding inhibition, numbers of nematode dauers produced on gastropod cadavers and natural variation in chemotaxis behaviour were also investigated. Additionally, the impact of virulent strains on beneficial non- target organisms and the mechanism of host behavioural manipulation were explored. Multiple wild strains were found to perform better than the commercial strain in regards to virulence, feeding inhibition, proliferation on cadavers and locating host cues. This research has demonstrated that other members of the Phasmarhabditis genus can be utilised as safe and effective biological control agents. This thesis presents which Phasmarhabditis species show the most potential for pathogenic ability and host seeking. Results obtained from this work have resulted the production of a new slug biocontrol product by BASF, utilising P. californica.
Implications of the dimuon CP asymmetry in B_{d,s} decays
Creators: name: Ligeti, Zoltan
name: Papucci, Michele
name: Perez, Gilad
name: Zupan, Jure
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The D0 Collaboration reported a 3.2sigma deviation from the standard model prediction in the like-sign dimuon asymmetry. Assuming that new physics contributes only to B_{d,s} mixing, we show that the data can be analyzed without using the theoretical calculation of ΔΓ_s, allowing for robust interpretations. We find that this framework gives a good fit to all measurements, including the recent CDF S_{ψϕ} result. The data allow universal new physics with similar contributions relative to the SM in the B_d and B_s systems, but favors a larger deviation in B_s than in B_d mixing. The general minimal flavor violation framework with flavor diagonal CP violating phases can account for the former and remarkably even for the latter case. This observation makes it simpler to speculate about which extensions with general flavor structure may also fit the data.
description: 5 pages, 4 figures; final version accepted in PRL
Modelling strategies for estimating vine development and growth under different environmental conditions
Creators: name: Leolini, Luisa
name: Merante, Paolo
name: Bindi, Marco
name: Moriondo, Marco
Publisher: name: Zenodo
Year: 2019
Subjects: Grapevine modelling
Climate change
viticulture
crop growth models

description: Viticulture is an important part of the agricultural sector with a high economic and environmental relevance especially in the most traditional wine regions. In these areas, the specific Terroir characterized by the complex of climate, soil and human factors contribute to define the peculiar features of grapes and the wines’ high quality. Any changes in environmental conditions and agricultural practices may affect the vintage quality with strong consequences on wine industry and the socioeconomic aspects of the winemaking sector. In this context, crop simulation models, which are able to represent vine development and growth, can be useful tools for predicting present and future performances under different environmental conditions. On this basis, the main characteristics of two crop models will be described/introduced: UNIFI.GrapeML a model library that collect specific modelling strategies for grapevine and CropSyst a multi-years, multi-crop model. Although these models are based on different modelling strategies, they include the main physiological processes of the plant and are able to reproduce the pivotal climate-plant-soil interactions. Accordingly, UNIFI.GrapeML and CropSyst simulation model will be applied for estimating the production cycle of different grapevine varieties under changing environmental conditions.
Noncommutative Vortices and Flux-Tubes from Yang-Mills Theories with Spontaneously Generated Fuzzy Extra Dimensions
Creators: name: Kurkcuoglu, Seckin
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a U(2) Yang-Mills theory on M x S_F^2 where M is an arbitrary noncommutative manifold and S_F^2 is a fuzzy sphere spontaneously generated from a noncommutative U(N) Yang-Mills theory on M, coupled to a triplet of scalars in the adjoint of U(N). Employing the SU(2)-equivariant gauge field constructed in arXiv:0905.2338, we perform the dimensional reduction of the theory over the fuzzy sphere. The emergent model is a noncommutative U(1) gauge theory coupled adjointly to a set of scalar fields. We study this model on the Groenewald-Moyal plane and find that, in certain limits, it admits noncommutative, non-BPS vortex as well as flux-tube (fluxon) solutions and discuss some of their properties.
description: 18+1 pages, typos corrected, published version
Fuzzy Scalar Field Theory as Matrix Quantum Mechanics
Creators: name: Ihl, Matthias
name: Sachse, Christoph
name: Saemann, Christian
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the phase diagram of scalar field theory on a three dimensional Euclidean spacetime whose spatial component is a fuzzy sphere. The corresponding model is an ordinary one-dimensional matrix model deformed by terms involving fixed external matrices. These terms can be approximated by multitrace expressions using a group theoretical method developed recently. The resulting matrix model is accessible to the standard techniques of matrix quantum mechanics.
description: 1+17 pages, 4 figures, minor improvements, version published in JHEP
On the Effect of Reference Frame Motion on InSAR Deformation Estimates
Creators: name: Bähr, Hermann
name: Samiei-Esfahany, Sami
name: Hanssen, Ramon F.
Publisher: name: Karlsruhe
Year: 2012

description: For processing of interferometric synthetic aperture radar (InSAR) data, precise satellite orbits are required. These orbits are given in a reference frame with respect to which tectonic plates perform a relative motion. Neglecting this motion can cause temporally increasing baseline errors that induce large scale error ramps into the interferometric phase. The amount of error depends on the geographical location and is evaluated globally for the ENVISAT orbit. Predicted biases of deformation estimates can reach up to 7 mm/a in some areas. Whereas these biases are not separable from actual deformation signals by spatio-temporal correlation properties, they are well predictable and can easily be accounted for. A most simple correction approach consists in compensating the plate motion by modifying orbital state vectors, assuming a homogeneous velocity for the whole plate. This approach has been tested on Persistent Scatterer Interferometry (PSI) results over the area of Groningen, the Netherlands.
Novel Superconducting States in Hybrid Devices
Creators: name: Grein, Roland Georg
Publisher: name: Karlsruhe
Year: 2012
Subjects: Proximity-Effekt
Supraleitung
Josephson Effekt

description: We discuss different scenarios which allow for inducing unconventional superconducting pairing correlations in heterostructures. Specifically, we investigate superconductor-ferromagnet hybrids using a recent extension of the Quasiclassical Theory of Superconductivity and discuss both the long range triplet Josephson effect and point contact spectra. In the second part, we investigate a microscopic model of the superconducting proximity effect in topological insulators.
Supplementary document for Tunable nonlocal metasurfaces based on graphene for analogue optical computation - 6372584.pdf
Creators: name: Khodasevych, Iryna
name: Wesemann, Lukas
name: Roberts, Ann
name: Iacopi, Francesca
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental Document
A method for pricing American options using semi-infinite linear programming
Creators: name: Christensen, Sören
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Finance (q-fin.CP)
subject: Probability (math.PR)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 60G40, 90C34, 60J25

description: We introduce a new approach for the numerical pricing of American options. The main idea is to choose a finite number of suitable excessive functions (randomly) and to find the smallest majorant of the gain function in the span of these functions. The resulting problem is a linear semi-infinite programming problem, that can be solved using standard algorithms. This leads to good upper bounds for the original problem. For our algorithms no discretization of space and time and no simulation is necessary. Furthermore it is applicable even for high-dimensional problems. The algorithm provides an approximation of the value not only for one starting point, but for the complete value function on the continuation set, so that the optimal exercise region and e.g. the Greeks can be calculated. We apply the algorithm to (one- and) multidimensional diffusions and to Lévy processes, and show it to be fast and accurate.
Intelligentes Energiemanagement in kleinen und mittleren Unternehmen
Creators: name: Winter, Johannes
Publisher: name: Karlsruhe
Year: 2014
Subjects: Energiemanagement
KMU
Lastverschiebung
Energieeffizienz

description: Die Arbeit gibt einen Ausblick auf die Lage der kleinen und mittleren Unternehmen in Deutschland im Wandel der Energieversorgung und die Herausforderungen der Energiewende, denen sie sich gegenüber sehen. Anhand von 7 Unternehmen und 2 öffentlichen Einrichtungen werden fallspezifische Möglichkeiten der Energieeffizienz und der Lastverschiebung dargestellt.
The media effect in Axelrod's model explained
Creators: name: Peres, Lucas R.
name: Fontanari, José F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We revisit the problem of introducing an external global field -- the mass media -- in Axelrod's model of social dynamics, where in addition to their nearest neighbors, the agents can interact with a virtual neighbor whose cultural features are fixed from the outset. The finding that this apparently homogenizing field actually increases the cultural diversity has been considered a puzzle since the phenomenon was first reported more than a decade ago. Here we offer a simple explanation for it, which is based on the pedestrian observation that Axelrod's model exhibits more cultural diversity, i.e., more distinct cultural domains, when the agents are allowed to interact solely with the media field than when they can interact with their neighbors as well. In this perspective, it is the local homogenizing interactions that work towards making the absorbing configurations less fragmented as compared with the extreme situation in which the agents interact with the media only.
Community perceptions of the hypertensive disorders of pregnancy
Creators: name: Vidler, Marianne
Publisher: name: University of British Columbia
Year: 2017

description: Background: Two to four percent of pregnancies are affected by pre-eclampsia, the most serious of the hypertensive disorders of pregnancy. This results in a significant health burden, which disproportionately affects those in low- and middle-income countries. Research has largely focused at the facility level; however, such an approach does not address underlying beliefs and cultural practices. The aim of this dissertation is to explore community perceptions of the hypertensive disorders of pregnancy, with a focus on Nigeria, Mozambique, Pakistan and India. Methods: An ethnographic research design was used to gain insight into the perceptions and, community characteristics that relate to understanding the hypertensive disorders of pregnancy. A systematic literature review and meta-synthesis was followed by in-depth qualitative studies in Nigeria, Mozambique, Pakistan and India. A qualitative evidence synthesis to ascertain women’s comprehension of the hypertensive disorders of pregnancy was conducted using thematic synthesis of: (i) the published findings, and (ii) transcript data. All analyses were conducted following thematic analysis. CERQual (‘Confidence in the Evidence from Review of Qualitative research’) was used to present the confidence of findings. Results: Findings of this dissertation indicate gaps in knowledge regarding the hypertensive disorders of pregnancy in all regions. The literature review suggests that insufficient evidence-based information was provided by health workers to women about the hypertensive disorders of pregnancy. The knowledge of aetiology and treatment of pre-eclampsia and eclampsia were limited in Nigeria. In Mozambique and Nigeria, local beliefs associated with the supernatural, were implicated in the development and treatment of the hypertensive disorders. Overall there were mixed opinions regarding the causes of hypertension in pregnancy, and a poor understanding of the connection between these conditions and pregnancy in all regions. Qualitative syntheses revealed cultural similarities and distinct differences in the understandings of these conditions. A comparison of methods highlights the benefits of syntheses from original data, however, challenges in access and labour-intensity should be considered. Conclusions: There is a need for efforts targeted at the community to improve knowledge of the hypertensive disorders of pregnancy. Culturally-specific findings should be used as a foundation for targeted education, information, communication initiatives.
Critical Josephson current in ballistic superconductor-graphene systems
Creators: name: Hagymási, I.
name: Kormányos, A.
name: Cserti, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the phase, the temperature and the junction length dependence of the supercurrent for ballistic graphene Josephson-junctions. For low temperatures we find non-sinusoidal dependence of the supercurrent on the superconductor phase difference for both short and long junctions. The skewness, which characterizes the deviation of the current-phase relation from a simple sinusoidal one, shows a linear dependence on the critical current for small currents. We discuss the similarities and differences with respect to the classical theory of Josephson junctions, where the weak link is formed by a diffusive or ballistic metal. The relation to other recent theoretical results on graphene Josephson junctions is pointed out and the possible experimental relevance of our work is considered as well.
description: 6 pages, 4 figures
Supplementary document for Tunable nonlocal metasurfaces based on graphene for analogue optical computation - 6224843.pdf
Creators: name: Khodasevych, Iryna
name: Wesemann, Lukas
name: Roberts, Ann
name: Iacopi, Francesca
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplementary Material
Numerical study of the wake acceleration effect using CFD approach
Creators: name: Chai, Xiang
Publisher: name: Karlsruhe
Year: 2014

description: A new drag force model was proposed to consider the wake acceleration effect. The proposed model is dependent on wake velocity. Based on a systematic CFD simulation, correlations were proposed to describe the velocity profile of turbulent wake. The proposed model was validated against the experimental data of bubble pairs and employed in the simulation of bubbly flow. It revealed better prediction accuracy than the existing models. It was also used to assess the bubble induced turbulence.
Analysing the electric field vector of air shower radio emission
Creators: name: Huber, Daniel
Publisher: name: Karlsruhe
Year: 2014
Subjects: Cosmic ray detection
radio
LOPES 3D
vertical antennas

description: LOPES 3D was radio antenna array built in Karlsruhe to study the benefits of radio cosmic ray measurements with vertical aligned antennas. In this thesis the setup and calibration of LOPES 3D are discussed. The data taken with LOPES 3D are analyzed and several methods to include vertical measurements in the analysis are developed and tested.
Gamma-Rays and the Far-Infrared-Radio Continuum Correlation Reveal a Powerful Galactic Centre Wind
Creators: name: Crocker, Roland M.
name: Jones, David I.
name: Aharonian, Felix
name: Law, Casey J.
name: Melia, Fulvio
name: Ott, Juergen
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We consider the thermal and non-thermal emission from the inner 200 pc of the Galaxy. The radiation from this almost star-burst-like region is ultimately driven dominantly by on-going massive star formation. We show that this region's radio continuum (RC) emission is in relative deficit with respect to the expectation afforded by the Far- infrared-Radio Continuum Correlation (FRC). Likewise we show that the region's gamma-ray emission falls short of that expected given its star formation and resultant supernova rates. These facts are compellingly explained by positing that a powerful (400-1200 km/s) wind is launched from the region. This wind probably plays a number of important roles including advecting positrons into the Galactic bulge thus explaining the observed ~kpc extension of the 511 keV positron annihilation signal around the GC. We also show that the large-scale GC magnetic field falls in the range ~100-300 microG and that - in the time they remain in the region - GC cosmic rays do not penetrate into the region's densest molecular material.
description: Version accepted for publication in MNRAS Letters. Discussion extended and references added
Phase Transitions in the 1-d Long-Range Diluted Heisenberg Spin Glass
Creators: name: Sharma, Auditya
name: Young, A. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use Monte Carlo simulations to study the one-dimensional long-range diluted Heisenberg spin glass with interactions that fall as a power, sigma, of the distance. Varying the power is argued to be equivalent to varying the space dimension of a short-range model. We are therefore able to study both the mean-field and non-mean-field regimes. For one value of sigma, in the non-mean-field regime, we find evidence that the chiral glass transition temperature may be somewhat higher than the spin glass transition temperature. For the other values of sigma we see no evidence for this.
description: 10 pages, 14 figures. Replaced with published version
Werkstoffanalytische Betrachtung der Eigenschaften von mittels neuartiger RTM-Fertigungsprozesse hergestellten glasfaserverstärkten Polymerverbunden
Creators: name: Haspel, Benedikt
Publisher: name: Karlsruhe
Year: 2014
Subjects: Analytische Modellierung
Glasfaser
RTM
Verbundwerkstoff
Werkstoffprüfung

description: Es werden Verbundwerkstoffe betrachtet, die durch modifizierte Fertigungsstrategien des konventionellen Resin Transfer Molding (RTM)-Verfahrens hergestellt wurden. Für eine spätere Prozessbewertung werden die mechanischen Eigenschaften der Verbunde unter quasistatischer Belastung gemessen und sowohl materialbezogen als auch prozessbezogen diskutiert sowie abschließend mit dem konventionellen RTM-Prozess abgeglichen. Der Prozessvergleich erfolgt mittels einer analytischen Modellierung.
Models used in "Transfer Learning Compensates Limited Data, Batch-Effects, And Technological Heterogeneity In Single-Cell Sequencing"
Creators: name: Park, Youngjun
Publisher: name: Zenodo
Year: 2021

description: Saved torch network files for "Transfer Learning Compensates Limited Data, Batch-Effects, And Technical Heterogeneity In Single-Cell Sequencing". gtex_pretrained_300000.tar.gz It contains torch weight data for feature_encoder and relation_network.
 Pretrained model with GTEx, saved at 300,000 episodes.
 tcga_network_bak.tar.gz It contains torch weight data for feature_encoder and relation_network.
 Pretrained model with TCGA 33 cancer types, saved at 300,000 episodes.

description: PyTorch network weight file
CP(n) supersymmetric mechanics in U(n) background gauge fields
Creators: name: Bellucci, Stefano
name: Krivonos, Sergey
name: Sutulin, Anton
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a new N=4 supersymmetric mechanics describing the motion of a particle over a $CP^n$ manifold in U(n) background gauge fields.
description: 8 pages, LaTeX file, PACS number: 11.30.Pb; footnote added on page 1, comments concerning brackets in (2.11) added, formula (3.4) is rewritten, and two new formulas (3.8) and (3.9) have been added
Microwave fidelity studies by varying antenna coupling
Creators: name: Köber, B.
name: Kuhl, U.
name: Stöckmann, H. -J.
name: Gorin, T.
name: Savin, D. V.
name: Seligman, T. H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The fidelity decay in a microwave billiard is considered, where the coupling to an attached antenna is varied. The resulting quantity, coupling fidelity, is experimentally studied for three different terminators of the varied antenna: a hard wall reflection, an open wall reflection, and a 50 Ohm load, corresponding to a totally open channel. The model description in terms of an effective Hamiltonian with a complex coupling constant is given. Quantitative agreement is found with the theory obtained from a modified VWZ approach [Verbaarschot et al, Phys. Rep. 129, 367 (1985)].
description: 9 pages 5 figure
Tracing the molecular gas in distant submillimetre galaxies via CO(1-0) imaging with the EVLA
Creators: name: Ivison, R. J.
name: Papadopoulos, P. P.
name: Smail, Ian
name: Greve, T. R.
name: Thomson, A. P.
name: Xilouris, E. M.
name: Chapman, S. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the results of a pilot study with the EVLA of 12CO J=1-0 emission from four SMGs at z=2.2-2.5, each with an existing detection of CO J=3-2. Using the EVLA's most compact configuration we detect strong, broad J=1-0 line emission from all of our targets. The median line width ratio, sigma(1-0)/sigma(3-2) = 1.15 +/- 0.06, suggests that the J=1-0 is more spatially extended than the J=3-2 emission, a situation confirmed by our maps which reveal velocity structure in several cases and typical sizes of ~16 kpc FWHM. The median Tb ratio is r(3-2/1-0) = 0.55 +/- 0.05, noting that our value may be biased high because of the J=3-2-based sample selection. Naively, this suggests gas masses ~2x higher than estimates made using higher-J transitions of CO, with the discrepency due to the difference in assumed Tb ratio. We also estimate masses using the 12CO J=1-0 line and the observed global Tb ratios, assuming standard underlying Tb ratios as well as a limiting SFE, i.e. without calling upon X(CO). Using this new method, we find a median molecular gas mass of (2.5 +/- 0.8) x 10^10 Msun, with a plausible range stretching 3x higher. Even larger masses cannot be ruled out, but are not favoured by dynamical constraints: the median dynamical mass for our sample is (2.3 +/- 1.4) x 10^11 Msun. We examine the Schmidt-Kennicutt relation for all the distant galaxy populations for which CO J=1-0 or J=2-1 data are available, finding small systematic differences. These have previously been interpreted as evidence for different modes of star formation, but we argue that these differences are to be expected, given the still considerable uncertainties. Finally, we discuss the morass of degeneracies surrounding molecular gas mass estimates, the possibilities for breaking them, and the future prospects for imaging and studying cold, quiescent molecular gas at high redshifts [abridged].
description: 13 pages, 2 figures, in press at MNRAS
Data Publication Workshop: Taking your data from the lab to the journal
Creators: name: Beltrán, Mercedes
name: Constantin, Maria
Publisher: name: Zenodo
Year: 2023

description: This deposit contains the slides used during the workshop Data Publication: Taking your data from the lab to the journal provided by Utrecht University's Faculty of Science. 
As part of the workshop materials also see Overview of Research Data Sharing Policies Across Various Scientific Publishers (zenodo.org)
 
(this version is superseded by v1.1: 10.5281/zenodo.10283420)
Two dimensional RG flows and Yang-Mills instantons
Creators: name: Gava, Edi
name: Karndumri, Parinya
name: Narain, K. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study RG flow solutions in (1,0) six dimensional supergravity coupled to an anti-symmetric tensor and Yang-Mills multiplets corresponding to a semisimple group $G$. We turn on $G$ instanton gauge fields, with instanton number $N$, in the conformally flat part of the 6D metric. The solution interpolates between two (4,0) supersymmetric $AdS_3\times S^3$ backgrounds with two different values of $AdS_3$ and $S^3$ radii and describes an RG flow in the dual 2D SCFT. For the single instanton case and $G=SU(2)$, there exist a consistent reduction ansatz to three dimensions, and the solution in this case can be interpreted as an uplifted 3D solution. Correspondingly, we present the solution in the framework of N=4 $(SU(2)\ltimes \mathbf{R}^3)^2$ three dimensional gauged supergravity. The flows studied here are of v.e.v. type, driven by a vacuum expectation value of a (not exactly) marginal operator of dimension two in the UV. We give an interpretation of the supergravity solution in terms of the D1/D5 system in type I string theory on K3, whose effective field theory is expected to flow to a (4,0) SCFT in the infrared.
description: 30 pages, clarifications of some notations added and typos corrected
Properties of Dark Matter Haloes and their Correlations: the Lesson from Principal Component Analysis
Creators: name: Skibba, Ramin A.
name: Maccio', Andrea V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the correlations between the structural parameters of dark matter haloes using Principal Component Analysis (PCA). We consider a set of eight parameters, six of which are commonly used to characterize dark matter halo properties: mass, concentration, spin, shape, overdensity, and the angle ($Φ_L$) between the major axis and the angular momentum vector. Two additional parameters ($\x_{off}$ and $ρ_{rms}$) are used to describe the degree of `relaxedness' of the halo. We find that we can account for much of the variance of these properties with halo mass and concentration, on the one hand, and halo relaxedness on the other. Nonetheless, three principle components are usually required to account for most of the variance. We argue that halo mass is not as dominant as expected, which is a challenge for halo occupation models and semi-analytic models that assume that mass determines other halo (and galaxy) properties. In addition, we find that the angle $Φ_L$ is not significantly correlated with other halo parameters, which may present a difficulty for models in which galaxy disks are oriented in haloes in a particular way. Finally, at fixed mass, we find that a halo's environment (quantified by the large-scale overdensity) is relatively unimportant.
description: 14 pages, 8 figures; minor revisions; MNRAS, in press
Phase diagram, energy scales and nonlocal correlations in the Anderson lattice model
Creators: name: Tanaskovic, D.
name: Haule, K.
name: Kotliar, G.
name: Dobrosavljevic, V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the Anderson lattice model with one f-orbital per lattice site as the simplest model which describes generic features of heavy fermion materials. The resistivity and magnetic susceptibility results obtained within dynamical mean field theory (DMFT) for a nearly half-filled conduction band show the existence of a single energy scale $T^*$ which is similar to the single ion Kondo temperature $T_K^o$. To determine the importance of inter-site correlations, we have also solved the model within cellular DMFT (CDMFT) with two sites in a unit cell. The antiferromagnetic region on the phase diagram is much narrower than in the single-site solution, having a smaller critical hybridization $V_c$ and Néel temperature $T_N$. At temperatures above $T_N$ the nonlocal correlations are small, and the DMFT paramagnetic solution is in this case practically exact, which justifies the ab initio LDA+DMFT approach in theoretical studies of heavy fermions. Strong inter-site correlations in the CDMFT solution for $T
description: 10 pages
Motivic Milnor fibers over complete intersection varieties and their virtual Betti numbers
Creators: name: Esterov, Alexander
name: Takeuchi, Kiyoshi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E18, 14M25, 32C38, 32S35, 32S40

description: We study the Jordan normal forms of the local and global monodromies over complete intersection subvarieties of $C^n$ by using the theory of motivic Milnor fibers. The results will be explicitly described by the mixed volumes of the faces of Newton polyhedrons.
description: 34 pages, 1 picture, revised
Big Bang nucleosynthesis with a stiff fluid
Creators: name: Dutta, Sourish
name: Scherrer, Robert J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Models that lead to a cosmological stiff fluid component, with a density $ρ_S$ that scales as $a^{-6}$, where $a$ is the scale factor, have been proposed recently in a variety of contexts. We calculate numerically the effect of such a stiff fluid on the primordial element abundances. Because the stiff fluid energy density decreases with the scale factor more rapidly than radiation, it produces a relatively larger change in the primordial helium-4 abundance than in the other element abundances, relative to the changes produced by an additional radiation component. We show that the helium-4 abundance varies linearly with the density of the stiff fluid at a fixed fiducial temperature. Taking $ρ_{S10}$ and $ρ_{R10}$ to be the stiff fluid energy density and the standard density in relativistic particles, respectively, at $T = 10$ MeV, we find that the change in the primordial helium abundance is well-fit by $ΔY_p = 0.00024(ρ_{S10}/ρ_{R10})$. The changes in the helium-4 abundance produced by additional radiation or by a stiff fluid are identical when these two components have equal density at a "pivot temperature", $T_*$, where we find $T_* = 0.55$ MeV. Current estimates of the primordial $^4$He abundance give the constraint on a stiff fluid energy density of $ρ_{S10}/ρ_{R10} < 30$.
description: 6 pages, 2 figures. Clarification added: element abundances derived using a full numerical calculation. Version accepted at PRD
Modeling the clustering of dark-matter haloes in resummed perturbation theories
Creators: name: Elia, Anna
name: Kulkarni, Suchita
name: Porciani, Cristiano
name: Pietroni, Massimo
name: Matarrese, Sabino
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We address the issue of the cosmological bias between matter and galaxy distributions, looking at dark-matter haloes as a first step to characterize galaxy clustering. Starting from the linear density field at high redshift, we follow the centre of mass trajectory of the material that will form each halo at late times (proto-halo). We adopt a fluid-like description for the evolution of perturbations in the proto-halo distribution, which is coupled to the matter density field via gravity. We present analytical solutions for the density and velocity fields, in the context of renormalized perturbation theory. We start from the linear solution, then compute one-loop corrections for the propagator and the power spectrum. Finally we analytically resum the propagator and we use a suitable extension of the time-renormalization-group method (Pietroni 2008) to resum the power spectrum. For halo masses M<10^{14} Msol/h our results at z=0 are in good agreement with N-body simulations. Our model is able to predict the halo-matter cross spectrum with an accuracy of 5 per cent up to k = 0.1 h/Mpc approaching the requirements of future galaxy redshift surveys.
description: 15 pages, 9 figures. Accepted for publication in MNRAS