cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Graphene adhesion on mica: Role of surface morphology
Creators: name: Rudenko, A. N.
name: Keil, F. J.
name: Katsnelson, M. I.
name: Lichtenstein, A. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate theoretically the adhesion and electronic properties of graphene on a muscovite mica surface using the density functional theory (DFT) with van der Waals (vdW) interactions taken into account (the vdW-DF approach). We found that irregularities in the local structure of cleaved mica surface provide different mechanisms for the mica-graphene binding. By assuming electroneutrality for both surfaces, the binding is mainly of vdW nature, barely exceeding thermal energy per carbon atom at room temperature. In contrast, if potassium atoms are non uniformly distributed on mica, the different regions of the surface give rise to $n$- or $p$-type doping of graphene. In turn, an additional interaction arises between the surfaces, significantly increasing the adhesion. For each case the electronic states of graphene remain unaltered by the adhesion. It is expected, however, that the Fermi level of graphene supported on realistic mica could be shifted relative to the Dirac point due to asymmetry in the charge doping. Obtained variations of the distance between graphene and mica for different regions of the surface are found to be consistent with recent atomic force microscopy experiments. A relative flatness of mica and the absence of interlayer covalent bonding in the mica-graphene system make this pair a promising candidate for practical use.
description: 6 pages, 3 figures
Gravitational Entropy of Hayward Black Hole
Creators: name: Iguchi, Hideo
Publisher: name: arXiv
Year: 2025
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the gravitational entropy defined by the Weyl curvature for the Hayward black hole, which is one of the regular black holes without singularity in the event horizon. Using the definition by the ratio of the Weyl curvature scalar and the Kretschmann scalar as the entropy measure, we evaluate the gravitational entropy on the outer and inner horizons. We derive an expression for the curvature tensor of the Hayward black hole that is as independent as possible of the parameter added to the black hole and give an equation for the entropy measure explicitly independent of that parameter. The gravitational entropy density used in previous studies presents questions from the standpoint of mathematical rigor while we discuss possible improvements in its definition. We compare the results for the Hayward black hole with the analysis for the Reisner-Nordstöm black hole and discuss the effect of singularity resolution on gravitational entropy.
description: 16 pages, 8 figures, published in Annals of Physics
[Promissory note, 1817 August 1, to Robert Ratsey Goelet] : [manuscript]
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 1817

description: Manuscript promissory note, signed, to Robert Ratsey Goelet, dated Aug. 1, 1813, in the amount of $367.73, with interest. Endorsed to Peter G. Hart by Robert Ratsey Goelet on verso
Black hole dynamical evolution in a Lorentz-violating spacetime
Creators: name: Esposito, S.
name: Salesi, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the black hole dynamical evolution in the framework of a Lorentz-violating spacetime endowed with a Schwarzchild-like momentum-dependent metric. Large deviations from the Hawking-Bekenstein predictions are obtained, depending on the values of the Lorentz-violating parameter lambda introduced. A non-trivial evolution comes out, following mainly from the existence of a non-vanishing minimum mass: for large Lorentz violations, most of the black hole evaporation takes place in the initial stage, which is then followed by a stationary stage (whose duration depends on the value of lambda) where the mass does not change appreciably. Furthermore, for the final stage of evolution, our model predicts a sweet slow death of the black hole, whose "slowness" again depends on lambda, in contrast with the violent final explosion predicted by the standard theory.
description: 8 pages, 8 figures
Sharing qualitative research data
Creators: name: Klapwijk, Eduard
Publisher: name: Zenodo
Year: 2022
Subjects: research data management
qualitative data
data access
anonymization

description: Short presentation about challenges and practices for sharing qualitative research data for the ESSB Data Coffee Breaks at the Erasmus School for Social and Behavioural Sciences at Erasmus University Rotterdam. Presented October 13 & 24, 2022
Supplemental files of the article 'State of the art of patient-reported outcomes in trials in acromegaly or growth hormone deficiency: a systematic review and meta-analysis'
Creators: name: van der Meulen, Merel
name: Najafabadi, Amir H. Zamanipoor
name: Broersen, Leonie
name: Schoones, Jan W.
name: M. Pereira, Alberto
name: R van Furth, Wouter
name: M. J. A. Claessen, Kim
name: R. Biermasz, Nienke
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: 110306 Endocrinology
subject: FOS: Clinical medicine

description: This file contains the supplemental information to the article 'State of the art of patient-reported outcomes in trials in acromegaly or growth hormone deficiency: a systematic review and meta-analysis'.
Formation of Modularity in a Model of Evolving Networks
Creators: name: Li, Menghui
name: Guan, Shuguang
name: Lai, Choy-Heng
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Modularity structures are common in various social and biological networks. However, its dynamical origin remains an open question. In this work, we set up a dynamical model describing the evolution of a social network. Based on the observations of real social networks, we introduced a link-creating/deleting strategy according to the local dynamics in the model. Thus the coevolution of dynamics and topology naturally determines the network properties. It is found that for a small coupling strength, the networked system cannot reach any synchronization and the network topology is homogeneous. Interestingly, when the coupling strength is large enough, the networked system spontaneously forms communities with different dynamical states. Meanwhile, the network topology becomes heterogeneous with modular structures. It is further shown that in a certain parameter regime, both the degree and the community size in the formed network follow a power-law distribution, and the networks are found to be assortative. These results are consistent with the characteristics of many empirical networks, and are helpful to understand the mechanism of formation of modularity in complex networks.
description: 6 pages, 4 figurs
Operad groups
Creators: name: Thumann, Werner
Publisher: name: Karlsruhe
Year: 2015

description: A new unified framework for Thompson-like groups using discrete operads is proposed. As a first application, we give sufficient conditions for operads to yield groups with finite type classifying spaces. This unifies and extends existing proofs for certain Thompson-like groups in a conceptual manner. Moreover, we discuss the vanishing of group cohomology for certain coefficients.
Mother Earth is for us all the discontent of Oromo pottery-making women at land dispossession in Southwest Oromia Ethiopia.pdf
Creators: name: Wayessa, Bula
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430102
subject: Archaeology of Asia, Africa and the Americas
classificationCode: 430107
subject: Historical archaeology (incl. industrial archaeology)

description: This paper examines the effects of changes in land tenure on female potters in the southern highlands of Ethiopia. Communal land has historically played an important role in the livelihoods of potterymaking women, who rely on the non-agricultural use of this land. Data was gathered through interviews and observations, and the resulting evidence was organized and analyzed to address the research objectives and contextualize the findings within a broader empirical framework. Recent changes to Ethiopia’s communal land tenure system have disproportionally affected the socio-economy of the pottery-making women in comparison to their non-pottery-making counterparts by constraining their access to clay mining sites. Meanwhile, globalization and the free market economy have facilitated the unrestricted import and distribution of plastic and metal objects, significantly reducing the need for pottery objects, and further impacting the potters’ livelihoods and social status. The fact that globalization and government changes to the communal land tenure system have disproportionally affected artisan women in Ethiopia resonates with the need for academia to pay more attention to intersectionality when studying gender bias, given that the situation has created an additional level of discrimination for socially marginalized women.
Quantum phase transition in the delocalized regime of the spin-boson model
Creators: name: Tong, Qing-Jun
name: An, Jun-Hong
name: Luo, Hong-Gang
name: Oh, C. H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The existence of the delocalized-localized quantum phase transition (QPT) in the ohmic spin-boson model has been commonly recognized. While the physics in the localized regime is relatively simple, the delocalized regime shows many interesting behaviors. Here we reveal that in this regime there exists a novel QPT: namely, from a phase without a bound state to a phase with a bound state, which leads to completely different dynamical behaviors in these two phases. If the reservoir is initially in the displaced vacuum state (i.e., the coherent state), the spin dynamics exhibits lossless oscillation when the bound state exists; otherwise, the oscillation will decay completely. This result is compatible with the coherence-incoherence transition occurring in the small-tunneling limit. Our work indicates that the QPT physics in the spin-boson model needs further exploration.
description: 5 pages, 3 figures
A generating function for the cubic interactions of higher spin fields
Creators: name: Manvelyan, Ruben
name: Mkrtchyan, Karapet
name: Ruehl, Werner
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an off-shell generating function for all cubic interactions of Higher Spin gauge fields constructed in arXiv:1003.2877. It is a generalization of the on-shell generating function proposed in arXiv:1006.5242, is written in a very compact way, and turns out to have a remarkable structure.
description: 14 pages, Latex,v.2 misprints corrected, v.3 ref. added, v. 4 published in Phys. Lett. B
Exact solution of a spin-1/2 $XX$ chain with three-site interactions in a random transverse field: Influence of randomness on quantum phase transition
Creators: name: Derzhko, Volodymyr
name: Derzhko, Oleg
name: Richter, Johannes
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present exact results for the ground-state and thermodynamic properties of the spin-1/2 $XX$ chain with three-site interactions in a random (Lorentzian) transverse field. We discuss the influence of randomness on the quantum critical behavior known to be present in the nonrandom model. We find that at zero temperature the characteristic features of the quantum phase transition, such as kinks in the magnetization versus field curve, are smeared out by randomness. However, at low but finite temperatures signatures of the quantum critical behavior are preserved if the randomness is not too large. Even the quantum critical region may be slightly enlarged for very weak randomness. In addition to the exact results for Lorentzian randomness we present a more general discussion of an arbitrarily random transverse magnetic field based on the inspection of the moments of the density of states.
description: 11 pages, 8 figures
title: Совершенствование мази с антибактериальным действием
Creators: name: Николаева, Анастасия
name: Жезняковская, Лариса
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Целью исследования стало совершенствование мази на основе растительных экстрактов цетрарии исландской и сфагнума. Был изменен состав основы ранее предложенной мази. Изучена биодоступность новых составов. Установлено, что изменение соотношения компонентов мазевых основ влияет на высвобождение усниновой кислоты.
Reaktionen von Zellen in dreidimensionalen Mikrostrukturen auf lokale mechanische Stimuli
Creators: name: Scheiwe, Andrea Caroline
Publisher: name: Karlsruhe
Year: 2015

description: Das Ziel dieser Arbeit ist die Entwicklung eines Versuchsaufbaus zur gezielten Manipulation von dreidimensionalen Mikrostrukturen, die Zellen tragen. Mit Hilfe eines solchen Aufbaus wird anschließend untersucht, wie sich einzelne Zellen in einer definierten dreidimensionalen Umgebung unter Einfluss einer wohldefinierten Kraft verhalten. Es wird unter anderem analysiert, wie sich Fibroblasten in Reaktion auf mechanische Reize umstrukturieren.
Random interlacements on Galton-Watson Trees
Creators: name: Tassy, Martin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We study the critical parameter u^{*} of random interlacements percolation (introduced by A.S Sznitman in arXiv:0704.2560) on a Galton-Watson tree conditioned on the non-extinction event. Starting from the previous work of A. Teixeira in arXiv:0907.0316, we show that, for a given law of a Galton-Watson tree, the value of this parameter is a.s. constant and non-trivial. We also characterize this value as the solution of a certain equation.
description: 10 pages
Nanoscale Polymeric Particles via Aerosol-Photopolymerization
Creators: name: Akgün, Ertan
Publisher: name: Karlsruhe
Year: 2015

description: This PhD thesis focuses on the process of aerosol-photopolymerization for the generation of various polymeric particles. Such structures are most often prepared by liquid-based methods via the well-established thermal initiation step, and aerosol-photopolymerization is presented as an alternative, aerosol-based technique which employs photoinitiated polymerization. Discussed within this thesis are the advantages and broad aspects of the process.
Implications of the CDF t \bar t Forward-Backward Asymmetry for Hard Top Physics
Creators: name: Delaunay, Cédric
name: Gedalia, Oram
name: Hochberg, Yonit
name: Perez, Gilad
name: Soreq, Yotam
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The CDF collaboration has recently reported a large deviation from the standard model of the t \bar t forward-backward asymmetry in the high invariant mass region. We interpret this measurement as coming from new physics at a heavy scale Lambda, and perform a model-independent analysis up to O(1/Lambda^4). A simple formalism to test and constrain models of new physics is provided. We find that a large asymmetry cannot be accommodated by heavy new physics that does not interfere with the standard model. We show that a smoking gun test for the heavy new physics hypothesis is a significant deviation from the standard model prediction for the t \bar t differential cross section at large invariant mass. At M_{t\bar t}>1 TeV the cross section is predicted to be at least twice that of the SM at the Tevatron, and for M_{t\bar t}>1.5 TeV at least three times larger than the SM at the LHC.
description: 12 pages, 3 figures. v2: Minor corrections in the text, references added. v3: Extended discussion on QCD NLO corrections, added short discussion on LHC dijet constraints; matches published version
Cross-Layer Approaches for an Aging-Aware Design of Nanoscale Microprocessors
Creators: name: Oboril, Fabian
Publisher: name: Karlsruhe
Year: 2015

description: Thanks to aggressive scaling of transistor dimensions, computers have revolutionized our life. However, the increasing unreliability of devices fabricated in nanoscale technologies emerged as a major threat for the future success of computers. In particular, accelerated transistor aging is of great importance, as it reduces the lifetime of digital systems. This thesis addresses this challenge by proposing new methods to model, analyze and mitigate aging at microarchitecture-level and above.
Thermal conductivity in a mixed state of a superconductor at low magnetic fields
Creators: name: Golubov, A. A.
name: Koshelev, A. E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We evaluate accurate low-field/low-temperature asymptotics of the thermal conductivity perpendicular to magnetic field for one-band and two-band s-wave superconductors using Keldysh-Usadel formalism. We show that heat transport in this regime is limited by tunneling of quasiparticles between adjacent vortices across a number of local points and therefore widely-used approximation of averaging over circular unit cell is not valid. In the single-band case, we obtain parameter-free analytical solution which provides theoretical lower limit for heat transport in the mixed state. In the two-band case, we show that heat transport is controlled by the ratio of gaps and diffusion constants in different bands. Presence of a weaker second band strongly enhances the thermal conductivity at low fields
description: 7 pages, 1 figure, discussion of the clean case and discussion of experiment added
title: Трудности диагностики паранеопластического синдрома. Клинический случай
Creators: name: Спиридонов, Артём
name: Иванова, Алла
name: Петрашова, Инна
name: Холодова, Маргарита
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Проблема паранеопластического синдрома (ПНС) объединяет специалистов разных областей: онкологов, терапевтов, ревматологов, неврологов, эндокринологов, дерматологов и др., в связи с трудностями ранней диагностики онкологических заболеваний за «маской» других болезней. В статье представлен обзор литературы, посвященный вопросам клиники и диагностики основных ПНС при различных локализациях
злокачественных опухолей. Приводится разбор клинического случая ПНС (вторичный дерматомиозит), обусловленного раком легкого. На примере данного разбора проводится оценка особенности течения вторичного дерматомиозита (ДМ), клинико-лабораторные признаки, подтверждающие диагноз рака легкого, терапия на стационарном и амбулаторном этапах. Знание особенностей ПНС при различных локализациях злокачественных заболеваний необходимо для своевременной диагностики и лечения основного заболевания и
проявлений ПНС.
Lokales Verhalten konvexer Körper und Approximation
Creators: name: Ziebarth, Ines
Publisher: name: Karlsruhe
Year: 2015

description: Fahnenmaße konvexer Körper werden als Projektionsmittel eingeführt und Eigenschaften abgeleitet. Für gemischte Maße der translativen Integralgeometrie und für Stützfunktionen werden Darstellungssätze mittels Fahnen-Oberflächenmaßen bewiesen. Zudem wird die Approximation konvexer Körper durch zufällige Polytope und zufällige polyedrische Mengen behandelt. Es werden asymptotische Mittelwertformeln und Varianzabschätzungen bewiesen, die den Fehler bei dieser Approximation beschreiben.
From Operads to Dendroidal Sets
Creators: name: Weiss, Ittay
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55P48, 55U10, 55U35

description: Dendroidal sets offer a formalism for the study of $\infty$-operads akin to the formalism of $\infty$-categories by means of simplicial sets. We present here an account of the current state of the theory while placing it in the context of the ideas that lead to the conception of dendroidal sets. We briefly illustrate how the added flexibility embodied in $\infty$-operads can be used in the study of $A_{\infty}$-spaces and weak $n$-categories in a way that cannot be realized using strict operads.
description: Written for an AMS volume on Mathematical Foundations of Quantum Field Theory and Perturbative String Theory
Fear of the dark - How light signalling modulates the herbivore mediated wounding response in rice
Creators: name: Brendel, Rita Erika
Publisher: name: Karlsruhe
Year: 2015

description: This study focuses on the integration of two external signals a plant has to react to, light and stress imposed by wounding. While the perception of light conditions influences the growth and development of a plant on a long time scale, wounding stress is an immediate event, to which the plant has to respond in a fast manner. Recent studies have given evidence, that the signalling pathways of light and defence are able to influence each other, which was investigated in this study.
Initial fluctuations and dihadron and $γ$-hadron correlations in high-energy heavy ion collisions
Creators: name: Ma, Guo-Liang
name: Wang, Xin-Nian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Jets, jet-medium interaction and hydrodynamic evolution of fluctuations in initial parton density all lead to the final anisotropic dihadron azimuthal correlations in high-energy heavy-ion collisions. We remove the harmonic flow background and study the net correlations from different sources with different initial conditions within the AMPT model. We also study $γ$-hadron correlations which are only influenced by jet-medium interactions.
description: 4 pages, Proceedings for Quark Matter 2011 Conference, May 23-28, 2011, Annecy, France; v2: final published version
Leistungsfähige Verbindungen des Ingenieurholzbaus - Einsatzmöglichkeiten für Nadel- und Laubholz
Creators: name: Enders-Comberg, Markus
Publisher: name: Karlsruhe
Year: 2015
Subjects: Buchenholz
Treppenversatz
Gewindestange
Querschnittsschwächung

description: Im Rahmen dieser Arbeit wurden mechanische Verbindungen und Kontaktverbindungen entwickelt, um eine effiziente Kraftübertragung zu ermöglichen und gezielt Buchenholz zu nutzen. Auf Grundlage von Tragfähigkeitsversuchen und theoretischen Betrachtungen wurde außerdem der Einfluss von Querschnittsschwächungen auf das Tragverhalten bei Zug- und Druckbeanspruchung parallel zur Faser untersucht.
Ampullimonas
Creators: name: Albuquerque, Luciana
name: Egas, Conceição
Publisher: name: Zenodo
Year: 2020
Subjects: Proteobacteria
Alcaligenaceae
Mesophilic
Aerobic
Chemolithoheterotrophic

description: The genus Ampullimonas comprises one species named Ampullimonas aquatilis. The organism forms rod-shaped cells that are 1.0 µm in width and 1.0–2.0 µm in length. The species is motile. The organism stains Gram-negative and endospores are not observed. Colonies are nonpigmented. The species A. aquatilis is mesophilic and strictly aerobic. Cytochrome c oxidase positive and catalase negative. Chemoorganotrophic; capable of chemolithoheterotrophic growth with molecular hydrogen. Able to fix N2 under microaerobic conditions. Growth factors are necessary for growth in minimal medium. Organic acids are used as carbon and energy sources; sugars, amino acids and polyols tested are not used for growth with the exception of glycerol. Major respiratory quinone of this species is ubiquinone 8 (U-8). The polar lipid profile is composed of phosphatidylglycerol (PG) and phosphatidylethanolamine (PE). Fatty acids are primarily straight-chain saturated and monounsaturated; hydroxy fatty acids are also present. The type strain was isolated from bottled mineral water. DNA G+C content (mol%): 49.7–49.8 (HPLC). Type species: Ampullimonas aquatilis França et al. 2016VP.
Kinetic Theory of Flocking: Derivation of Hydrodynamic Equations
Creators: name: Ihle, Thomas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: It is shown how to explicitly coarse-grain the microscopic dynamics of the Vicsek model for self-propelled agents. The macroscopic transport equations are derived by means of an Enskog-type kinetic theory. Expressions for all transport coefficients at large particle speed are given. The phase transition from a disordered to a flocking state is studied numerically and analytically.
description: 4 pages, 1 figure
The daemonology of unplumbed space : weird fiction, disgust, and the aesthetics of the unthinkable
Creators: name: Newell, Jonathan
Publisher: name: University of British Columbia
Year: 2019

description: “The Daemonology of Unplumbed Space: Weird Fiction, Disgust, and the Aesthetics of the Unthinkable” explores the aesthetic and metaphysical significance of disgust in weird fiction. Beginning with the weird’s forefather, Edgar Allan Poe, the study traces the twisted entanglement of metaphysics, aesthetics, affect, and weird fiction through the nineteenth and early twentieth centuries, considering along the way the myriad attempts of authors such as Arthur Machen, Algernon Blackwood, and H.P. Lovecraft to stage encounters with the unthinkable. Drawing on recent philosophical efforts to reinvigorate metaphysical thought – including speculative realism and new materialism – as well as affect theory, the dissertation argues that in contrast with earlier Gothic writers, whose focus on sublime aesthetic experience reified the importance and power of the human subject and entertained fantasies of spiritual transcendence, authors of weird fiction exploit the viscerality of disgust to confront readers with the impermanence and instability of a subject polluted by nonhuman forces which seep into it from the world around it. In doing so, weird fiction helps us to think about the nature of this queasy, nonhuman world, to glimpse an existence beyond the world merely as it appears to us. By investigating the intertwinement of the aesthetics of disgust and metaphysical speculation about the nonhuman world, the dissertation expands our understanding of weird fiction and the study of affect in literature. It thus contributes to a growing understanding of weird fiction as more than a pulp, essentially commercial genre, rather interpreting the weird as literature of ecstatic yearning for a non-anthropocentric reality, literature which dwells on questions of being, becoming, and the ultimate nature of the universe.
Joint IMOTHEP / CAJU workshop on Hybrid Electric Propulsion - EXACT
Creators: name: Atanasov, G.
Publisher: name: Zenodo
Year: 2023
Subjects: IMOTHEP
aviation
greenaviation
H2020Transport
H2020
HorizonEurope
CAJU
CINEA
climatechange
HEP
EU

description: Presentation at the Joint IMOTHEP / CAJU workshop on Hybrid Electric Propulsion (HEP) at Eurocontrol in Brussels (B) on 29 & 30 November 2023.
Conductivity and scattering in graphene bilayers: numerically exact results vs. Boltzmann approach
Creators: name: Xu, Hengyi
name: Heinzel, T.
name: Zozoulenko, I. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We derive analytical expressions for the conductivity of bilayer graphene (BLG) using the Boltzmann approach within the the Born approximation for a model of Gaussian disorders describing both short- and long-range impurity scattering. The range of validity of the Born approximation is established by comparing the analytical results to exact tight-binding numerical calculations. A comparison of the obtained density dependencies of the conductivity with experimental data shows that the BLG samples investigated experimentally so far are in the quantum scattering regime where the Fermi wavelength exceeds the effective impurity range. In this regime both short- and long-range scattering lead to the same linear density dependence of the conductivity. Our calculations imply that bilayer and single layer graphene have the same scattering mechanisms. We also provide an upper limit for the effective, density dependent spatial extension of the scatterers present in the experiments.
description: a new appendix is added giving details of the derivation of the analytical expressions for the Boltzmann conducticity
Search for inelastic dark matter with the CDMS II experiment
Creators: name: CDMS Collaboration
name: Ahmed, Z.
name: Akerib, D. S.
name: Arrenberg, S.
name: Bailey, C. N.
name: Balakishiyeva, D.
name: Baudis, L.
name: Bauer, D. A.
name: Brink, P. L.
name: Bruch, T.
name: Bunker, R.
name: Cabrera, B.
name: Caldwell, D. O.
name: Cooley, J.
name: Silva, E. do Couto e
name: Cushman, P.
name: Daal, M.
name: DeJongh, F.
name: Di Stefano, P.
name: Dragowsky, M. R.
name: Duong, L.
name: Fallows, S.
name: Figueroa-Feliciano, E.
name: Filippini, J.
name: Fox, J.
name: Fritts, M.
name: Golwala, S. R.
name: Hall, J.
name: Hennings-Yeomans, R.
name: Hertel, S. A.
name: Holmgren, D.
name: Hsu, L.
name: Huber, M. E.
name: Kamaev, O.
name: Kiveni, M.
name: Kos, M.
name: Leman, S. W.
name: Liu, S.
name: Mahapatra, R.
name: Mandic, V.
name: McCarthy, K. A.
name: Mirabolfathi, N.
name: Moore, D.
name: Nelson, H.
name: Ogburn, R. W.
name: Phipps, A.
name: Pyle, M.
name: Qiu, X.
name: Ramberg, E.
name: Rau, W.
name: Razeti, M.
name: Reisetter, A.
name: Resch, R.
name: Saab, T.
name: Sadoulet, B.
name: Sander, J.
name: Schnee, R. W.
name: Seitz, D. N.
name: Serfass, B.
name: Sundqvist, K. M.
name: Tarka, M.
name: Wikus, P.
name: Yellin, S.
name: Yoo, J.
name: Young, B. A.
name: Zhang, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Results are presented from a reanalysis of the entire five-tower data set acquired with the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory, with an exposure of 969 kg-days. The analysis window was extended to a recoil energy of 150 keV, and an improved surface-event background-rejection cut was defined to increase the sensitivity of the experiment to the inelastic dark matter (iDM) model. Three dark matter candidates were found between 25 keV and 150 keV. The probability to observe three or more background events in this energy range is 11%. Because of the occurrence of these events the constraints on the iDM parameter space are slightly less stringent than those from our previous analysis, which used an energy window of 10-100 keV.
description: 10 pages, 10 figures, minor changes to match published version, conclusion unchanged
CT images and 3D virtual models of Styloichthys changae (IVPP V33078 and V33079)
Creators: name: Cui, Xindong
name: Qiao, Tuo
name: Peng, Lijian
name: Zhu, Min
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 370506
subject: Palaeontology (incl. palynology)

description: This project contains CT images and 3D models of Styloichthys changae (IVPP V33078 and V33079) for Cui et al., 2024 manuscript 'New material of the Early Devonian sarcopterygian Styloichthys illuminates the origin of cosmine'.
title: Vorwort: 75 Jahre VÖB. 1946-2021
Creators: name: Stückler, Pamela
name: Ramminger, Eva
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 9–11
Multi-resolution internal template cleaning: An application to the Wilkinson Microwave Anisotropy Probe 7-yr polarization data
Creators: name: Fernández-Cobos, R.
name: Vielva, P.
name: Barreiro, R. B.
name: Martínez-González, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmic microwave background (CMB) radiation data obtained by different experiments contain, besides the desired signal, a superposition of microwave sky contributions. We present a fast and robust method, using a wavelet decomposition on the sphere, to recover the CMB signal from microwave maps. An application to \textit{WMAP} polarization data is presented, showing its good performance particularly in very polluted regions of the sky. The applied wavelet has the advantages of requiring little computational time in its calculations, being adapted to the \textit{HEALPix} pixelization scheme, and offering the possibility of multi-resolution analysis. The decomposition is implemented as part of a fully internal template fitting method, minimizing the variance of the resulting map at each scale. Using a $χ^2$ characterization of the noise, we find that the residuals of the cleaned maps are compatible with those expected from the instrumental noise. The maps are also comparable to those obtained from the \textit{WMAP} team, but in our case we do not make use of external data sets. In addition, at low resolution, our cleaned maps present a lower level of noise. The E-mode power spectrum $C_{\ell}^{EE}$ is computed at high and low resolution; and a cross power spectrum $C_{\ell}^{TE}$ is also calculated from the foreground reduced maps of temperature given by \textit{WMAP} and our cleaned maps of polarization at high resolution. These spectra are consistent with the power spectra supplied by the \textit{WMAP} team. We detect the E-mode acoustic peak at $\ell \sim 400$, as predicted by the standard $ΛCDM$ model. The B-mode power spectrum $C_{\ell}^{BB}$ is compatible with zero.
description: 8 pages, 6 figures. Some changes have been done from the original manuscript. This paper is accepted by MNRAS
title: Grußworte
Creators: name: Engelkenmeier, Ute
name: Feigl, Markus
name: Söllner, Konstanze
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 13–16
Y-system and beta-deformed N=4 Super-Yang-Mills
Creators: name: Gromov, Nikolay
name: Levkovich-Maslyuk, Fedor
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show how the perturbation theory results recently obtained by F.Fiamberti, A.Santambrogio, C.Sieg and D.Zanon for operator anomalous dimensions of beta-deformed Super-Yang-Mills theory can be reproduced from the AdS5/CFT4 Y-system proposed by N.G., V.Kazakov and P.Vieira. To do this, we obtain the general twisted asymptotic solution of this Y-system of functional equations. We show that existence of an additional parameter beta in the deformed theory allows to extract rich information about the perturbation theory integrals directly from Y-system. Using this method we found a simple generating function for a broad class of such integrals.
description: clarifications added to Appendix; published version
title: Изучение изменений топографо-анатомических и гидродинамических показателей общего желчного протока при операциях Льюиса как одного из механизмов развития энцефалопатий
Creators: name: Черных, Антон
name: Гаврилов, Илья
name: Сулиманов, Рушан
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Основополагающим вариантом хирургических манипуляций при раке пищеводa является оперaция по типу Льюисa. Несмотря на качественно высокий уровень выполнения данной операции, опасность развития энцефалопатии после хирургического вмешательства в раннем периоде остаётся высокой, что и побуждает лечащего врача искать причины развития даннoгo состояния. Это обстоятельство является главным мотивом к специальнoму научнoму исследованию.
Decay of helical and non-helical magnetic knots
Creators: name: Candelaresi, Simon
name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present calculations of the relaxation of magnetic field structures that have the shape of particular knots and links. A set of helical magnetic flux configurations is considered, which we call $n$-foil knots of which the trefoil knot is the most primitive member. We also consider two nonhelical knots; namely, the Borromean rings as well as a single interlocked flux rope that also serves as the logo of the Inter-University Centre for Astronomy and Astrophysics in Pune, India. The field decay characteristics of both configurations is investigated and compared with previous calculations of helical and nonhelical triple-ring configurations. Unlike earlier nonhelical configurations, the present ones cannot trivially be reduced via flux annihilation to a single ring. For the $n$-foil knots the decay is described by power laws that range form $t^{-2/3}$ to $t^{-1/3}$, which can be as slow as the $t^{-1/3}$ behavior for helical triple-ring structures that were seen in earlier work. The two nonhelical configurations decay like $t^{-1}$, which is somewhat slower than the previously obtained $t^{-3/2}$ behavior in the decay of interlocked rings with zero magnetic helicity. We attribute the difference to the creation of local structures that contain magnetic helicity which inhibits the field decay due to the existence of a lower bound imposed by the realizability condition. We show that net magnetic helicity can be produced resistively as a result of a slight imbalance between mutually canceling helical pieces as they are being driven apart. We speculate that higher order topological invariants beyond magnetic helicity may also be responsible for slowing down the decay of the two more complicated nonhelical structures mentioned above.
description: 11 pages, 27 figures, submitted to Phys. Rev. E
title: In memoriam - Erinnerungen an Bruno Bauer
Creators: name: Alker-Windbichler, Stefan
name: Blumesberger, Susanne
name: Köstner-Pemsel, Christina
name: Heim, Ortwin
name: Mentzel, Walter
name: Pum, Gabriele
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 17–22
Metric operators for non-Hermitian quadratic su(2) Hamiltonians
Creators: name: Assis, Paulo E. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A class of non-Hermitian quadratic su(2) Hamiltonians having an anti-linear symmetry is constructed. This is achieved by analysing the possible symmetries of such systems in terms of automorphisms of the algebra. In fact, different realisations for this type of symmetry are obtained, including the natural occurrence of charge conjugation together with parity and time reversal. Once specified the underlying anti-linear symmetry of the Hamiltonian, the former, if unbroken, leads to a purely real spectrum and the latter can be mapped to a Hermitian counterpart by, amongst other possibilities, a similarity transformation. Here, Lie-algebraic methods which were used to investigate the generalised Swanson Hamiltonian are employed to identify the class of quadratic Hamiltonians that allow for such a mapping to the Hermitian counterpart. Whereas for the linear su(2) system every Hamiltonian of this type can be mapped to a Hermitian counterpart by a transformation which is itself an exponential of a linear combination of su(2) generators, the situation is more complicated for quadratic Hamiltonians. Therefore, the possibility of more elaborate similarity transformations, including quadratic exponents, is also explored in detail. The existence of finite dimensional representations for the su(2) Hamiltonian, as opposed to the su(1,1) studied before, allows for comparison with explicit diagonalisation results for finite matrices. Finally, the similarity transformations constructed are compared with the analogue of Swanson's method for exact diagonalsation of the problem, establishing a simple relation between both approaches.
description: 25 pages, 6 figures
State Limits of Peloids
Creators: name: Külzer, Michael
Publisher: name: Karlsruhe
Year: 2015
Subjects: fine-grained soils
physico-chemical particle interactions
experiments
aluminium oxide
laponite

description: State limits are states of a granular material which are asymptotically attained by proportional deformation with constant deformation rate. Peloids (Greek: muds) are mixtures of hydrophilic fine-grained minerals, water, ions, gas bubbles and additives. Well-defined aluminium oxide and laponite peloids are experimentally investigated with respect to the influence of particle interactions on the course of state limits. The transferability of the results to natural peloids is exemplarily shown.
Liquid-Phase Epitaxial Growth of Highly Oriented and Crystalline MOF Thin Films: Post-Synthetic Modification and Different Applications
Creators: name: Wang, Zhengbang
Publisher: name: Karlsruhe
Year: 2015

description: The studies for this PhD thesis showed the preparation, characterization and application of new-type surface-mounted metal-organic frameworks (SURMOFs). The aims were  to: (1) heteroepitaxially grow MOF-on-MOF multilayer systems with huge lattice mismatch; (2) modify azide-based SURMOFs using alkyne-azide click chemistry; (3) chemically pattern SURMOFs using postsynthetic modification (PSM); (4) engineer UHM-3 SURMOFs with quantitative Cu(I) defects using postsynthetic thermal treatment.
Holographic Renormalization and Stress Tensors in New Massive Gravity
Creators: name: Kwon, Yongjoon
name: Nam, Soonkeon
name: Park, Jong-Dae
name: Yi, Sang-Heon
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We obtain holographically renormalized boundary stress tensors with the emphasis on a special point in the parameter space of three dimensional new massive gravity, using the so-called Fefferman-Graham coordinates with relevant counter terms. Through the linearized equations of motion with a standard prescription, we also obtain correlators among these stress tensors. We argue that the self-consistency of holographic renormalization determines counter terms up to unphysical ambiguities. Using these renormalized stress tensors in Fefferman-Graham coordinates, we obtain the central charges of dual CFT, and mass and angular momentum of some $AdS$ black hole solutions. These results are consistent with the previous ones obtained by other methods. In this study on the Fefferman-Graham expansion of new massive gravity, some aspects of higher curvature gravity are revealed.
description: Version accepted for publication in JHEP, conclusion revised, references added
Vacuum field energy and spontaneous emission in anomalously dispersive cavities
Creators: name: Bradshaw, Douglas H.
name: Di Rosa, Michael D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Anomalously dispersive cavities, particularly white light cavities, may have larger bandwidth to finesse ratios than their normally dispersive counterparts. Partly for this reason, their use has been proposed for use in LIGO-like gravity wave detectors and in ring-laser gyroscopes. In this paper we analyze the quantum noise associated with anomalously dispersive cavity modes. The vacuum field energy associated with a particular cavity mode is proportional to the cavity-averaged group velocity of that mode. For anomalously dispersive cavities with group index values between 1 and 0, this means that the total vacuum field energy associated with a particular cavity mode must exceed $\hbar ω/2$. For white light cavities in particular, the group index approaches zero and the vacuum field energy of a particular spatial mode may be significantly enhanced. We predict enhanced spontaneous emission rates into anomalously dispersive cavity modes and broadened laser linewidths when the linewidth of intracavity emitters is broader than the cavity linewidth.
description: 9 pages, 4 figures
The Enigma of Tubulin Detyrosination - Functional Evidence from Plants
Creators: name: Schneider, Natalie
Publisher: name: Karlsruhe
Year: 2015

description: Detyrosination of alpha-tubulin seems to be conserved over all eukaryotes. However, its biological function in plants has remained obscure. In order to get insight into the physiological function of tubulin detyrosination, I was phenotyping an overexpressor rice mutant, which is shifting the cycle towards the tyrosinated form. In a second approach an in vitro system was established in order to analyze what happens to microtubule polymerization if these conditions are changed outside a cell.
Liquid heat capacity in the approach from the solid state: anharmonic theory
Creators: name: Bolmatov, Dima
name: Trachenko, Kostya
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Calculating liquid energy and heat capacity in general form is an open problem in condensed matter physics. We develop a recent approach to liquids from the solid state by accounting for the contribution of anharmonicity and thermal expansion to liquid energy and heat capacity. We subsequently compare theoretical predictions to the experiments results of 5 commonly discussed liquids, and find a good agreement with no free fitting parameters. We discuss and compare the proposed theory to previous approaches.
description: 8 pages, 6 figures