cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phase diagram of the fully frustrated transverse-field Ising model on the honeycomb lattice
Creators: name: Coletta, T.
name: Picon, J. -D.
name: Korshunov, S. E.
name: Mila, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the current interest in the quantum dimer model on the triangular lattice, we investigate the phase diagram of the closely related fully-frustrated transverse field Ising model on the honeycomb lattice using classical and semi-classical approximations. We show that, in addition to the fully polarized phase at large field, the classical model possesses a multitude of phases that break the translational symmetry which in the dimer language, correspond to a plaquette phase and a columnar phase separated by an infinite cascade of mixed phases. The modification of the phase diagram by quantum fluctuations has been investigated in the context of linear spin-wave theory. The extrapolation of the semiclassical energies suggests that the plaquette phase extends down to zero field for spin 1/2, in agreement with the $\sqrt{12}\times\sqrt{12}$ phase of the quantum dimer model on the triangular lattice with only kinetic energy.
description: 15 Pages, 11 Figures, Accepted for PRB
Data exchange format and template
Creators: name: Krey, Volker
name: Huppmann, Daniel
name: Charousset-Brignol, Sandrine
name: Camacho, Luis Olmos
name: Cohen, Jed
name: Galán, Andrés Ramos
name: Pisciella, Paolo
name: Boonman, Hettie
name: Perger, Theresia
name: Haertel, Philipp
name: Graabak, Ingeborg
name: Crespo del Granado, Pedro
Publisher: name: Zenodo
Year: 2019

description: Providing results from energy-economic modelling to policymakers and the public at large in a transparent and accessible format requires intuitive, web-based tools for visualization and analysis. In addition, making methods, structural information and detailed parametric model assumptions transparently available to the wider scientific community is important to live up to scientific standards and establish trust in the results of model-based studies. In order to facilitate the linking of different energy models in an efficient way, on the one hand efficient processes and workflows are needed and on the other hand standardized ways of exchanging information among the models. This requires the development of both an improved modelling platform infrastructure as well as the standards and “handshake” definitions to exchange data between models within the consortium and disseminate results underpinning policy insights to the broader scientific community and all stakeholders of this project. The openENTRANCE consortium has thus embarked on the creation of common data exchange formats to share model input data and quantitative results. Ideally such standards build on existing standards to enable faster uptake across the energy modelling community. IIASA has been involved in the process of developing of such standards in the context of the Integrated Assessment Modelling Consortium (IAMC), and drawing on the experiences and lessons learned there to ensure the development of standards that are compatible with norms used in other disciplines.
Jet studies in 200 GeV p+p and d+Au collisions from the STAR experiment at RHIC
Creators: name: Kapitan, Jan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recent progress in full jet reconstruction in heavy-ion collisions at RHIC makes it a promising tool for the quantitative study of the QCD at high energy density. Measurements in d+Au collisions are important to disentangle initial state nuclear effects from medium-induced k_T broadening and jet quenching. Furthermore, comparison to measurements in p+p gives access to cold nuclear matter effects. Inclusive jet p_T spectra and di-jet correlations (k_T) in 200 GeV p+p and d+Au collisions from the 2007-2008 RHIC run are presented.
description: 4 pages, 5 figures. To appear in Hard Probes 2010 conference proceedings
D=3, N=8 conformal supergravity and the Dragon window
Creators: name: Cederwall, Martin
name: Gran, Ulf
name: Nilsson, Bengt E. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give a superspace description of D=3, N=8 supergravity. The formulation is off-shell in the sense that the equations of motion are not implied by the superspace constraints (but an action principle is not given). The multiplet structure is unconventional, which we connect to the existence of a "Dragon window", that is modules occurring in the supercurvature but not in the supertorsion. According to Dragon's theorem this cannot happen above three dimensions. We clarify the relevance of this window for going on the conformal shell, and discuss some aspects of coupling to conformal matter.
description: plain tex, 24 pp v2: minor changes
Subspace Properties of Network Coding and their Applications
Creators: name: Siavoshani, Mahdi Jafari
name: Fragouli, Christina
name: Diggavi, Suhas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Systems that employ network coding for content distribution convey to the receivers linear combinations of the source packets. If we assume randomized network coding, during this process the network nodes collect random subspaces of the space spanned by the source packets. We establish several fundamental properties of the random subspaces induced in such a system, and show that these subspaces implicitly carry topological information about the network and its state that can be passively collected and inferred. We leverage this information towards a number of applications that are interesting in their own right, such as topology inference, bottleneck discovery in peer-to-peer systems and locating Byzantine attackers. We thus argue that, randomized network coding, apart from its better known properties for improving information delivery rate, can additionally facilitate network management and control.
description: Submitted to IEEE transactions on information theory. The paper has 21 pages
Baryon asymmetry from leptogenesis with four zero neutrino Yukawa textures
Creators: name: Adhikary, Biswajit
name: Ghosal, Ambar
name: Roy, Probir
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The generation of the right amount of baryon asymmetry $η$ of the Universe from supersymmetric leptogenesis is studied within the type-I seesaw framework with three heavy singlet Majorana neutrinos $N_i\,\,(i = 1,2,3)$ and their superpartners. We assume the occurrence of four zeroes in the neutrino Yukawa coupling matrix $Y_ν$, taken to be $μτ$ symmetric, in the weak basis where $N_i$ (with real masses $M_i>0$) and the charged leptons $l_α\,\, (α= e,μ,τ)$ are mass diagonal. The quadrant of the single nontrivial phase, allowed in the corresponding light neutrino mass matrix $m_ν$, gets fixed and additional constraints ensue from the requirement of matching $η$ with its observed value. Special attention is paid to flavor effects in the washout of the lepton asymmetry. We also comment on the role of small departures from high scale $μτ$ symmetry due to RG evolution.
description: 35 pages, no figure, Published Version
Adiabatic Faraday effect in a two-level Hamiltonian formalism
Creators: name: Dasgupta, Basudeb
name: Raffelt, Georg G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The helicity of a photon traversing a magnetized plasma can flip when the B-field along the trajectory slowly reverses. Broderick and Blandford have recently shown that this intriguing effect can profoundly change the usual Faraday effect for radio waves. We study this phenomenon in a formalism analogous to neutrino flavor oscillations: the evolution is governed by a Schroedinger equation for a two-level system consisting of the two photon helicities. Our treatment allows for a transparent physical understanding of this system and its dynamics. In particular, it allows us to investigate the nature of transitions at intermediate adiabaticities.
description: 8 pages, 2 eps figures, and a note added. Title changed. Matches published version
Growth, structure and lattice dynamics of epitaxial rare earth films and nanostructures
Creators: name: Waller, Olga
Publisher: name: Karlsruhe
Year: 2015
Subjects: lattice dynamics
lanthanides
rare earths
nuclear inelastic scattering

description: The thesis is focused on epitaxial growth, structure characterization and investigation of the lattice dynamics of lanthanide films and nanostructures by inelastic X-ray scattering and in situ nuclear inelastic scattering. The phonon dispersions of Sm in the Sm-type and dhcp structure and Nd in the dhcp lattice are measured. The phonon densities of states of Eu fcc nanoislands and wire-like Eu structures are determined. The experimental results are compared with the ab initio theory.
A Model-based Understanding of Reversible Oxide-ion-conducting and Proton-conducting Solid Oxide Fuel Cells (SOFCs)
Creators: name: Menon, Vikram
Publisher: name: Karlsruhe
Year: 2015
Subjects: Solid oxide fuel cell (SOFC)
solid oxide electrolysis cell (SOEC)
SOFC stacks
numerical modeling
proton-conducting

description: In this thesis, a unified framework to model and analyze the dynamics of solid oxide cells (SOCs) is described. The unified numerical framework is then employed to study: (i) the transient behavior of SOFC stacks, (ii) solid oxide electrolysis cells (SOECs) for hydrogen production by H2O electrolysis, (iii) SOECs for synthesis gas production by H2O/CO2 co-electrolysis, and (iv) mass and heat transport in proton-conducting SOFCs.
Quantitative Proteomic Approaches in a Zebrafish Model of Granulocytic Inflammation
Creators: name: Singh, Sachin Kumar
Publisher: name: Karlsruhe
Year: 2015
Subjects: Zebrafish
Granulocytes
Proteomics

description: Neutrophils represent the most abundant type of leukocytes in vertebrates and are the first cells migrating to sites of trauma. Despite their fundamental importance, our understanding of the molecular changes occurring within neutrophils upon inflammation in a living animal remains fairly limited. In this study, the zebrafish model was used to investigate the in vivo orchestration of a neutrophil inflammatory response at the protein level.
The Geometry of (non) abelian adiabatic pumping
Creators: name: Leone, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We give a gauge description of the adiabatic charge pumping in closed systems, both in Abelian and non-Abelian processes, and by means of asymptotic Wilson loops in a suitable parameter manifold. Our geometric formulation provides new insights into this issue, and a very simple algorithm for numerical computations. Indeed, as we show first, discretized Berry--Wilczeck--Zee holonomies are easy to implement. Finally, we study non-Abelian pumping in a solvable four-state model, already used in several contexts, to demonstrate the relevance of our approach.
description: 17 pages, 7 figures
Il consumatore responsabile: un caso di virtù
Creators: name: Zambon, Adriano
Publisher: name: Milan Law Review
Year: 2021

description: Lo scopo di questo articolo è analizzare la nozione di consumatore responsabile. Si sosterrà che, in generale, quando si parla di consumatore responsabile, la responsabilità a cui ci si riferisce rappresenta un caso di virtù, consistente nel prendere seriamente, nel corso della condotta descrivibile come consumo, un dovere morale, e sarà esaminata la connessione di questa responsabilità con l’informazione e l’educazione del consumatore.
description: Milan Law Review, V. 2 N. 1 (2021): Milan Law Review
Tokenization of Assets: Security Tokens in Liechtenstein and Switzerland
Creators: name: Layr, Angelika K.
Publisher: name: Milan Law Review
Year: 2021

description: Technological innovations invariably lead to legal questions being raised; the sphere of digitalization of physical documents and securities by use of blockchain and other distributed ledger technologies does not constitute an exception. While solutions for many questions can be found within the existing legal framework, some developments call for legislative measures. This paper examines the hurdles in connection with the issuance and transfer of securities by virtue of a mere digital transaction and the approaches of the Liechtenstein and Swiss legislator to overcome them. Both have recognized that entries in distributed ledgers may fulfill the same main functions as the possession of a physical document. While the focus of the selective legal adaptations in Switzerland is on the use of DLT and securities law, the Liechtenstein legislator strives towards a holistic legal and regulatory framework for the entire token economy by introduction of a new set of rules.
description: Milan Law Review, V. 2 N. 1 (2021): Milan Law Review
L’astensione dal voto dell’amministratore di società per azioni in conflitto di interessi da dovere a diritto
Creators: name: Ferri Jr., Giuseppe
Publisher: name: Milan Law Review
Year: 2021

description: L’attuale disciplina del conflitto di interessi degli amministratori di società per azioni solleva una pluralità di problemi derivanti dalla difficile coesistenza tra la scelta di far venire meno l’espressa previsione del dovere di astensione dal voto dell’amministratore titolare dell’interesse e quella di continuare a considerare invalida, purché idonea ad arrecare danno alla società, la deliberazione adottata con il voto rilevante di costui: il lavoro tenta di superare la potenziale contraddizione tra un voto, quello dell’amministratore in conflitto di interessi, apparentemente lecito e, allo stesso tempo, almeno potenzialmente invalido osservando che l’astensione dal voto, originariamente doverosa, è nel tempo divenuta lecita.
description: Milan Law Review, V. 2 N. 1 (2021): Milan Law Review
Introduction to machine actionable metadata
Creators: name: Vasiljevic, Nikola
Publisher: name: Zenodo
Year: 2021
Subjects: FAIR data
metadata
machine-actionable metadta

description: We will introduce an approach to developing machine-actionable metadata templates. Also, we will present DCAT V3 and a corresponding set of machine-actionable templates. Furthermore, we will show how to configure these templates to be domain-specific by means of introducing domain-specific vocabularies and create metadata.
Fluid Membranes and 2d Quantum Gravity
Creators: name: Codello, A.
name: Zanusso, O.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the RG flow of two dimensional (fluid) membranes embedded in Euclidean D-dimensional space using functional RG methods based on the effective average action. By considering a truncation ansatz for the effective average action with both extrinsic and intrinsic curvature terms we derive a system of beta functions for the running surface tension, bending rigidity and Gaussian rigidity. We look for non-trivial fixed points but we find no evidence for a crumpling transition at $T\neq0$. Finally, we propose to identify the $D\rightarrow 0$ limit of the theory with two dimensional quantum gravity. In this limit we derive new beta functions for both cosmological and Newton's constants.
description: 16 pages, 1 figure
An explanation of interference effects in the double slit experiment: Classical trajectories plus ballistic diffusion caused by zero-point fluctuations
Creators: name: Groessing, Gerhard
name: Fussy, Siegfried
name: Pascasio, Johannes Mesa
name: Schwabl, Herbert
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: A classical explanation of interference effects in the double slit experiment is proposed. We claim that for every single "particle" a thermal context can be defined, which reflects its embedding within boundary conditions as given by the totality of arrangements in an experimental apparatus. To account for this context, we introduce a "path excitation field", which derives from the thermodynamics of the zero-point vacuum and which represents all possible paths a "particle" can take via thermal path fluctuations. The intensity distribution on a screen behind a double slit is calculated, as well as the corresponding trajectories and the probability density current. The trajectories are shown to obey a "no crossing" rule with respect to the central line, i.e., between the two slits and orthogonal to their connecting line. This agrees with the Bohmian interpretation, but appears here without the necessity of invoking the quantum potential.
description: 26 pages, 6 figures; accepted version to be published in Annals of Physics (2012)
Spectral asymptotics for Robin problems with a discontinuous coefficient
Creators: name: Grubb, Gerd
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 35J40, 47G30, 58C40

description: The spectral behavior of the difference between the resolvents of two realizations $\tilde A_1$ and $\tilde A_2$ of a second-order strongly elliptic symmetric differential operator $A$, defined by different Robin conditions $νu=b_1γ_0u$ and $νu=b_2γ_0u$, can in the case where all coefficients are $C^\infty$ be determined by use of a general result by the author in 1984 on singular Green operators. We here treat the problem for nonsmooth $b_i$. Using a Krein resolvent formula, we show that if $b_1$ and $b_2$ are in $L_\infty$, the s-numbers $s_j$ of $(\tilde A_1 -λ)^{-1}-(\tilde A_2 -λ)^{-1}$ satisfy $s_j j^{3/(n-1)}\le C$ for all $j$; this improves a recent result for $A=-Δ$ by Behrndt et al., that $\sum_js_j ^p(n-1)/3$. A sharper estimate is obtained when $b_1$ and $b_2$ are in $C^ε$ for some $ε>0$, with jumps at a smooth hypersurface, namely that $s_j j^{3/(n-1)}\to c$ for $j\to \infty$, with a constant $c$ defined from the principal symbol of $A$ and $b_2-b_1$. As an auxiliary result we show that the usual principal spectral asymptotic estimate for pseudodifferential operators of negative order on a closed manifold extends to products of pseudodifferential operators interspersed with piecewise continuous functions.
description: 20 pages, notation simplified. To appear in J. Spectral Theory
title: Сравнительная оценка гибридов и сортов гвоздики турецкой в условиях Новгородской области
Creators: name: Возняк, Василиса
name: Абдушаева, Ярослава
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Представлены результаты изучения распространённых и перспективных гибридов и сортов гвоздики турецкой, включённых в реестр по Северо-Западному региону и пригодных для возделывания в Новгородской области. Проведены фенологические наблюдения и биометрические измерения растений гвоздики турецкой.
title: Bibliotheken müssen sich einmischen und brauchen dazu eine starke Interessensvertretung! - Statement
Creators: name: Zechner, Gerhard
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 49–52
Resonance enhancement of neutrinoless double electron capture
Creators: name: Krivoruchenko, M. I.
name: Simkovic, Fedor
name: Frekers, Dieter
name: Faessler, Amand
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The process of neutrinoless double electron capture ($0ν$ECEC) is revisited for those cases where the two participating atoms are nearly degenerate in mass. The theoretical framework is the formalism of an oscillation of two atoms with different total lepton number (and parity), one of which can be in an excited state so that mass degeneracy is realized. In such a case and assuming light Majorana neutrinos, the two atoms will be in a mixed configuration with respect to the weak interaction. A resonant enhancement of transitions between such pairs of atoms will occur, which could be detected by the subsequent electromagnetic de-excitation of the excited state of the daughter atom and nucleus. Available data of atomic masses, as well as nuclear and atomic excitations are used to select the most likely candidates for such resonant $0ν$ECEC transitions. Assuming an effective mass for the Majorana neutrino of 1 eV, some half-lives are predicted to be as low as $10^{22}$ years in the unitary limit. It is argued that, in order to obtain more accurate predictions for the $0ν$ECEC half-lives, precision mass measurements of the atoms involved are necessary, which can readily be accomplished by today's high precision Penning traps. Further advancements also require a better understanding of high-lying excited states of the final nuclei (i.e. excitation energy, angular momentum and parity) and the calculation of the nuclear matrix elements.
description: 35 pages LaTeX, 2 eps figures, 5 tables; Sect. 3.6 extended, references to recent papers added, replaced with published version
J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD
Creators: name: Ma, Yan-Qing
name: Wang, Kai
name: Chao, Kuang-Ta
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: We present a complete evaluation for $\jpsi(\psip)$ prompt production at the Tevatron and LHC at next-to-leading order in nonrelativistic QCD, including color-singlet, color-octet, and higher charmonia feeddown contributions. The short-distance coefficients of $\pj$ at next-to-leading order are found to be larger than leading order by more than an order of magnitude but with a minus sign at high transverse momentum $p_T$. Two new linear combinations of color-octet matrix elements are obtained from the CDF data, and used to predict $\jpsi$ production at the LHC, which agrees with the CMS data. The possibility of $\sa$ dominance and the $\jpsi$ polarization puzzle are also discussed.
description: Version published in PRL, 4 pages, 4 figures
Furthering the development of in-home virtual assistant devices through the consideration of the temporal home: Transcription Analysis
Creators: name: Pooley, Andrew
Publisher: name: Loughborough University
Year: 2023

description: For a research study titled "Furthering the development of in-home virtual assistant devices through the consideration of the temporal home", Transcription AnalysisAbstract from paper:This paper extends current research on in-home virtual assistant (VA) devices, focusing on how future domestic VA devices can support the temporal structures and routines within the home. We recruited representatives from 15 households with varied compositions, ranging from single inhabitants to full nest families. Drawing upon P.G. Wodehouse’s The Inimitable Jeeves as inspiration, the methodology sought to imitate the relationship between a recruitment agency worker (researcher) and an employer (household participant) seeking to hire a human personal assistant (e.g., an ‘Amazon Echo Dot’ or ‘Google Home’ type of device) for their home. A ‘household audit’ comprising a guided household tour followed by an architectural survey was undertaken to determine the spatiotemporal routines within the home. Householder descriptions were scrutinized through the traditional Labovian narrative schema, with findings being discussed through Reddy et al’s notion of temporal features to examine how routine activities emerge and unfold within the home from a temporal perspective. We argue that the temporal concepts discussed by Reddy et al. are a useful lens for understanding the temporal nature of the activities that take place in a home and how VAs can better fulfil their roles as domesticated ‘human personal assistant’.
Controlling a superconducting nanowire single-photon detector using tailored bright illumination
Creators: name: Lydersen, Lars
name: Akhlaghi, Mohsen K.
name: Majedi, A. Hamed
name: Skaar, Johannes
name: Makarov, Vadim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We experimentally demonstrate that a superconducting nanowire single-photon detector is deterministically controllable by bright illumination. We found that bright light can temporarily make a large fraction of the nanowire length normally-conductive, can extend deadtime after a normal photon detection, and can cause a hotspot formation during the deadtime with a highly nonlinear sensitivity. In result, although based on different physics, the superconducting detector turns out to be controllable by virtually the same techniques as avalanche photodiode detectors. As demonstrated earlier, when such detectors are used in a quantum key distribution system, this allows an eavesdropper to launch a detector control attack to capture the full secret key without being revealed by to many errors in the key.
description: Expanded discussions, updated references. 9 pages, 8 figures
New species in the genus Ophrys (Orchidaceae) to the Italian and French Florae
Creators: name: Romieg Soca
Publisher: name: Zenodo
Year: 2011
Subjects: Ophrys
Italia

description: Romolini R. & Soca R., 2011. New species in the genus Ophrys (Orchidaceae) to the Italian and French Florae. Journal Europäischer Orchideen 43(4): 759-784.
title: Содержание тяжелых металлов в плодовых телах лесных грибов Новгородской области
Creators: name: Голубева, Ирина
name: Летенкова, Ирина
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: В статье приведены результаты определения концентраций тяжелых металлов в плодовых телах дикорастущих белых грибов Boletus edulis, собранных на территории Новгородской области. Определение концентрации ионов тяжелых металлов выполнено методом атомно-эмиссионной спектрометрии. Сделаны выводы о распределении цинка, кадмия, свинца, хрома, никеля, железа и марганца по плодовому телу гриба. Зафиксированы концентрации свинца и кадмия, превышающие ПДК, в грибах из двух районов.
Coupled dark matter-dark energy in light of near Universe observations
Creators: name: Honorez, Laura Lopez
name: Reid, Beth A.
name: Mena, Olga
name: Verde, Licia
name: Jimenez, Raul
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmological analysis based on currently available observations are unable to rule out a sizeable coupling among the dark energy and dark matter fluids. We explore a variety of coupled dark matter-dark energy models, which satisfy cosmic microwave background constraints, in light of low redshift and near universe observations. We illustrate the phenomenology of different classes of dark coupling models, paying particular attention in distinguishing between effects that appear only on the expansion history and those that appear in the growth of structure. We find that while a broad class of dark coupling models are effectively models where general relativity (GR) is modified --and thus can be probed by a combination of tests for the expansion history and the growth of structure--, there is a class of dark coupling models where gravity is still GR, but the growth of perturbations is, in principle modified. While this effect is small in the specific models we have considered, one should bear in mind that an inconsistency between reconstructed expansion history and growth may not uniquely indicate deviations from GR. Our low redshift constraints arise from cosmic velocities, redshift space distortions and dark matter abundance in galaxy voids. We find that current data constrain the dimensionless coupling to be |xi|<0.2, but prospects from forthcoming data are for a significant improvement. Future, precise measurements of the Hubble constant, combined with high-precision constraints on the growth of structure, could provide the key to rule out dark coupling models which survive other tests. We shall exploit as well weak equivalence principle violation arguments, which have the potential to highly disfavour a broad family of coupled models.
description: 34 pages, 6 figures; changes to match published version
Furthering the Development of Virtual Agents and Communication Robot Devices through the Consideration of the Temporal Home: Transcription Analysis
Creators: name: Pooley, Andrew
Publisher: name: Loughborough University
Year: 2023

description: For a research study titled "Furthering the development of in-home virtual assistant devices through the consideration of the temporal home", Transcription AnalysisAbstract from paper:This paper extends current research on in-home virtual assistant (VA) devices, focusing on how future domestic VA devices can support the temporal structures and routines within the home. We recruited representatives from 15 households with varied compositions, ranging from single inhabitants to full nest families. Drawing upon P.G. Wodehouse’s The Inimitable Jeeves as inspiration, the methodology sought to imitate the relationship between a recruitment agency worker (researcher) and an employer (household participant) seeking to hire a human personal assistant (e.g., an ‘Amazon Echo Dot’ or ‘Google Home’ type of device) for their home. A ‘household audit’ comprising a guided household tour followed by an architectural survey was undertaken to determine the spatiotemporal routines within the home. Householder descriptions were scrutinized through the traditional Labovian narrative schema, with findings being discussed through Reddy et al’s notion of temporal features to examine how routine activities emerge and unfold within the home from a temporal perspective. We argue that the temporal concepts discussed by Reddy et al. are a useful lens for understanding the temporal nature of the activities that take place in a home and how VAs can better fulfil their roles as domesticated ‘human personal assistant’.
Single-magnet rotary flowmeter for liquid metals
Creators: name: Priede, Jānis
name: Buchenau, Dominique
name: Gerbeth, Gunter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present a theory of single-magnet flowmeter for liquid metals and compare it with experimental results. The flowmeter consists of a freely rotating permanent magnet, which is magnetized perpendicularly to the axle it is mounted on. When such a magnet is placed close to a tube carrying liquid metal flow, it rotates so that the driving torque due to the eddy currents induced by the flow is balanced by the braking torque induced by the rotation itself. The equilibrium rotation rate, which varies directly with the flow velocity and inversely with the distance between the magnet and the layer, is affected neither by the electrical conductivity of the metal nor by the magnet strength. We obtain simple analytical solutions for the force and torque on slowly moving and rotating magnets due to eddy currents in a layer of infinite horizontal extent. The predicted equilibrium rotation rates qualitatively agree with the magnet rotation rate measured on a liquid sodium flow in stainless steel duct.
description: 15 pages, 6 figures, revised version, to appear in J. Appl. Phys
Probing the local dynamics of periodic orbits by the generalized alignment index (GALI) method
Creators: name: Manos, T.
name: Skokos, Ch.
name: Antonopoulos, Ch.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: As originally formulated, the Generalized Alignment Index (GALI) method of chaos detection has so far been applied to distinguish quasiperiodic from chaotic motion in conservative nonlinear dynamical systems. In this paper we extend its realm of applicability by using it to investigate the local dynamics of periodic orbits. We show theoretically and verify numerically that for stable periodic orbits the GALIs tend to zero following particular power laws for Hamiltonian flows, while they fluctuate around non-zero values for symplectic maps. By comparison, the GALIs of unstable periodic orbits tend exponentially to zero, both for flows and maps. We also apply the GALIs for investigating the dynamics in the neighborhood of periodic orbits, and show that for chaotic solutions influenced by the homoclinic tangle of unstable periodic orbits, the GALIs can exhibit a remarkable oscillatory behavior during which their amplitudes change by many orders of magnitude. Finally, we use the GALI method to elucidate further the connection between the dynamics of Hamiltonian flows and symplectic maps. In particular, we show that, using for the computation of GALIs the components of deviation vectors orthogonal to the direction of motion, the indices of stable periodic orbits behave for flows as they do for maps.
description: 17 pages, 9 figures (accepted for publication in Int. J. of Bifurcation and Chaos)
Study of magnetic features of Nd₂Fe₁₄B through the spin reorientation transition by magnetic force microscopy
Creators: name: Saleem, Muhammad
Publisher: name: University of British Columbia
Year: 2017

description: Nd₂Fe₁₄B is one of the high performance permanent magnets that has appeared as an appealing compound for commercial applications. The understanding of its macroscopic magnetic properties through the study of its magnetic domain structures has received great attention. In this study, we use magnetic force microscopy (MFM) to image the magnetic features as a function of temperature through the spin-reorientation transition temperature (TSR ∼ 135 K) of a Nd₂Fe₁₄B single crystal. We observe a pronounced change in the anisotropy of the magnetic features upon cooling from 170 K to 100 K. Our autocorrelation analysis of the MFM images reveals an increase in the four-fold component of the anisotropy below TSR. The magnetic feature size is estimated from the two-fold and four-fold components and found to be between 4.5 µm and 6 µm below TSR. We observe an average magnetic feature size around 5 µm above the spin reorientation transition. The complexity in the geometry of magnetic features is studied from the fractal dimension (FD) analysis. Higher values of FD below TSR indicate that the magnetic features possess more rugged boundaries. Average values of FD increase from 1.17 ± 0.05 for T > TSR to 1.29 ± 0.04 for T < TSR.
Supersolid phase transitions for hardcore bosons on a triangular lattice
Creators: name: Zhang, Xue-Feng
name: Dillenschneider, Raoul
name: Yu, Yue
name: Eggert, Sebastian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Hard-core bosons on a triangular lattice with nearest neighbor repulsion are a prototypical example of a system with supersolid behavior on a lattice. We show that in this model the physical origin of the supersolid phase can be understood quantitatively and analytically by constructing quasiparticle excitations of defects that are moving on an ordered background. The location of the solid to supersolid phase transition line is predicted from the effective model for both positive and negative (frustrated) hopping parameters. For positive hopping parameters the calculations agree very accurately with numerical Quantum Monte Carlo simulations. The numerical results indicate that the supersolid to superfluid transition is first order.
description: Accepted version. 6 pages, 5 figures. The latest pdf-file can be found at http://www.physik.uni-kl.de/eggert/papers/index.html
Phase Space Models of the Dwarf Spheroidal Galaxies
Creators: name: Amorisco, N. C.
name: Evans, N. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This paper introduces new phase-space models of dwarf spheroidal galaxies (dSphs). The stellar component has an isotropic, lowered isothermal (or King) distribution function. A physical basis for the isotropization of stellar velocities is given by tidal stirring, whilst the isothermality of the distribution function guarantees the observed flatness of the velocity dispersion profile in the inner parts. Our models reproduce the data on the half-light radius and line of sight central velocity dispersion of the dSphs. We show that different dark halo profiles -- whether cored or cusped -- lead to very similar mass estimates within one particular radius, namely 1.7 half-light radii. Deviations between mass measures due to different density profiles are substantially smaller than the uncertainties propagated by the observational errors. We produce a mass measure for each of the Milky Way dSphs and find that the two most massive are the most luminous, namely Sagittarius (~ 2.8 x 10^8 solar masses) and Fornax (~ 1.3 x 10^8 solar masses). The least massive of the Milky Way satellites are Willman 1 (~ 4 x 10^5 solar masses) and Segue 1 (~ 6 x 10^5 solar masses).
description: 20 pages, 11 figures, MNRAS, submitted. A factor of 2^(1/2) is corrected in this version, which changes some of the numbers
The role of submillimetre galaxies in hierarchical galaxy formation
Creators: name: Gonzalez, Juan E.
name: Lacey, C. G.
name: Baugh, C. M.
name: Frenk, C. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the role of submillimetre galaxies (SMGs) in the galaxy formation process in the Lambda Cold Dark Matter cosmology. We use the Baugh et al. (2005) semi-analytical model, which matches the observed SMG number counts and redshift distribution by assuming a top-heavy initial mass function (IMF) in bursts triggered by galaxy mergers. We build galaxy merger trees and follow the evolution and properties of SMGs and their descendants. Our primary sample of model SMGs consists of galaxies which had 850 mu fluxes brighter than 5 mJy at some redshift z>1. Our model predicts that the present-day descendants of such SMGs cover a wide range of stellar masses ~ 10^{10} - 10^{12} Msun/h, with a median ~ 10^{11} Msun/h, and that more than 70% of these descendants are bulge-dominated. More than 50% of present day galaxies with stellar masses larger than 7 x 10^{11} Msun/h are predicted to be descendants of such SMGs. We find that although SMGs make an important contribution to the total star formation rate at z~2, the final stellar mass produced in the submillimetre phase contributes only 0.2% of the total present-day stellar mass, and 2% of the stellar mass of SMG descendants, in stark contrast to the popular picture in which the SMG phase marks the production of the bulk of the mass of present day massive ellipticals.
description: 14 pages, 13 figures. Accepted for publication in MNRAS, following minor revisions, including new Fig.9
Kontaktverbindungen zur Längsschubübertragung in den Schmalseiten von Brettsperrholzelementen
Creators: name: Schmidt, Tobias
Publisher: name: Karlsruhe
Year: 2016

description: Flächenbauteile aus Brettsperrholz (BSP) sind aufgrund ihrer hohen Schubsteifigkeit und Schubfestigkeit besonders geeignet für Beanspruchungen in Scheibenebene. Mit den derzeitigen Verbindungstechniken können diese Eigenschaften des BSP nicht annähernd erreicht werden. Um das Potential von BSP unter Scheibenbeanspruchung nutzen zu können, wurden im Rahmen eines Forschungsvorhabens »Kontaktverbindungen« in den Schmalseiten von BSP-Elementen entwickelt. In diesem Beitrag wird eine Auswahl von Kontaktverbindungen (KV) aus Buchenfurnierschichtholz, die für Schmalseitenfugen in Wand- und Deckenscheiben unter quasi-statischen Einwirkungen entwickelt wurden, gezeigt. Weiter sollen experimentelle Untersuchungen zur Längsschubtragfähigkeit von BSP im Verbindungsbereich darüber Aufschluss geben, welche Mindestabstände einzuhalten sind, um sprödes Längsschubversagen im BSP zu vermeiden. Für Erdbebeneinwirkungen wird ein duktiler Verbinder für die Schmalseitenfugen von BSP-Wandscheiben vorgestellt. Ein Stahlbau-Biegedämpfer wurde so auf die Besonderheiten des Holzbaus angepasst, dass die plastische Hysterese nahezu vollständig im Stahl stattfindet.
The galaxy counts-in-cells distribution from the SDSS
Creators: name: Yang, Abel
name: Saslaw, William C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We determine the galaxy counts-in-cells distribution from the Sloan Digital Sky Survey (SDSS) for 3D spherical cells in redshift space as well as for 2D projected cells. We find that cosmic variance in the SDSS causes the counts-in-cells distributions in different quadrants to differ from each other by up to 20%. We also find that within this cosmic variance, the overall galaxy counts-in-cells distribution agrees with both the gravitational quasi-equilibrium distribution and the negative binomial distribution. We also find that brighter galaxies are more strongly clustered than if they were randomly selected from a larger complete sample that includes galaxies of all luminosities. The results suggest that bright galaxies could be in dark matter haloes separated by less than ~10 Mpc/h.
description: Accepted for publication in the Astrophysical Journal. Revised version with referee suggestions and corrected typos
Quantum Strings and the AdS4/CFT3 Interpolating Function
Creators: name: Abbott, Michael C.
name: Aniceto, Inês
name: Bombardelli, Diego
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The existence of a nontrivial interpolating function h(λ) is one of the novel features of the new AdS4/CFT3 correspondence involving ABJM theory. At strong coupling, most of the investigation of semiclassical effects so far has been for strings in the AdS4 sector. Several cutoff prescriptions have been proposed, leading to different predictions for the constant term in the expansion h(λ)=\sqrt{λ/2} + c + ... . We calculate quantum corrections for giant magnons, using the algebraic curve, and show by comparing to the dispersion relation that the same prescriptions lead to the same values of c in this CP3 sector. We then turn to finite-J effects, where a comparison with the Luescher F-term correction shows a mismatch for one of the three sum prescriptions. We also compute some dyonic and higher F-terms for future comparisons.
description: 30 pages, 1 figure, 1 table. v2 has minor improvements to the text, and extra references. v3 has further textual changes, version to appear in JHEP
Critical free energy and Casimir forces in rectangular geometries
Creators: name: Dohm, Volker
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the critical behavior of the free energy and the thermodynamic Casimir force in a $L_\parallel^{d-1} \times L$ block geometry in $2 1$), and zero for a cube $(ρ=1)$. We also present extrapolations to the cylinder limit ($ρ=\infty$) and to the film limit ($ρ=0$) for $n=1$ and $d=3$. Our analytic results for finite-size scaling functions in the minimal renormalization scheme at fixed dimension $d=3$ agree well with Monte Carlo data for the three-dimensional Ising model by Hasenbusch for $ρ=1$ and by Vasilyev et al. for $ρ=1/6$ above, at, and below $T_c$.
description: 23 pages, 14 figures
An Edgeworth expansion for finite population L-statistics
Creators: name: Čiginas, Andrius
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62E20

description: In this paper, we consider the one-term Edgeworth expansion for finite population L-statistics. We provide an explicit formula for the Edgeworth correction term and give sufficient conditions for the validity of the expansion which are expressed in terms of the weight function that defines the statistics and moment conditions.
description: 14 pages. Minor revisions. Some explanatory comments and a numerical example were added. Lith. Math. J. (to appear)
Graphing and Grafting Graphene: Classifying Finite Topological Defects
Creators: name: Cockayne, Eric
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The structure of finite-area topological defects in graphene is described in terms of both the direct honeycomb lattice and its dual triangular lattice. Such defects are equivalent to cutting out a patch of graphene and replacing it with a different patch with the same number of dangling bonds. An important subset of these defects, bound by a closed loop of alternating 5- and 7-membered carbon rings, explains most finite-area topological defects that have been experimentally observed. Previously unidentified defects seen in scanning tunneling microscope (STM) images of graphene grown on SiC are identified as isolated divacancies or divacancy clusters.
Cr2O3 thin films grown at room temperature by low pressure laser chemical vapour deposition
Creators: name: Sousa, P. M.
name: Silvestre, A. J.
name: Conde, O.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Chromia (Cr2O3) has been extensively explored for the purpose of developing widespread industrial applications, owing to the convergence of a variety of mechanical, physical and chemical properties in one single oxide material. Various methods have been used for large area synthesis of Cr2O3 films. However, for selective area growth and growth on thermally sensitive materials, laser-assisted chemical vapour deposition (LCVD) can be applied advantageously. Here we report on the growth of single layers of pure Cr2O3 onto sapphire substrates at room temperature by low pressure photolytic LCVD, using UV laser radiation and Cr(CO)6 as chromium precursor. The feasibility of the LCVD technique to access selective area deposition of chromia thin films is demonstrated. Best results were obtained for a laser fluence of 120 mJ cm-2 and a partial pressure ratio of O2 to Cr(CO)6 of 1.0. Samples grown with these experimental parameters are polycrystalline and their microstructure is characterised by a high density of particles whose size follows a lognormal distribution. Deposition rates of 0.1 nm s-1 and mean particle sizes of 1.85 μm were measured for these films.
description: 16 pages, 6 figures, accepted for publication in Thin Solid Films