cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Casimir densities induced by a sphere in the hyperbolic vacuum of de Sitter spacetime
Creators: name: Saharian, A. A.
name: Petrosyan, T. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Complete set of modes and the Hadamard function are constructed for a scalar field inside and outside a sphere in (D+1)-dimensional de Sitter spacetime foliated by negative constant curvature spaces. We assume that the field obeys Robin boundary condition on the sphere. The contributions in the Hadamard function induced by the sphere are explicitly separated and the vacuum expectation values (VEVs) of the field squared and energy-momentum tensor are investigated for the hyperbolic vacuum. In the flat spacetime limit the latter is reduced to the conformal vacuum in the Milne universe and is different from the maximally symmetric Bunch-Davies vacuum state. The vacuum energy-momentum tensor has a nonzero off-diagonal component that describes the energy flux in the radial direction. The latter is a purely sphere-induced effect and is absent in the boundary-free geometry. Depending on the constant in Robin boundary condition and also on the radial coordinate, the energy flux can be directed either from the sphere or towards the sphere. At early stages of the cosmological expansion the effects of the spacetime curvature on the sphere-induced VEVs are weak and the leading terms in the corresponding expansions coincide with those for a sphere in the Milne universe. The influence of the gravitational field is essential at late stages of the expansion. Depending on the field mass and the curvature coupling parameter, the decay of the sphere-induced VEVs, as functions of the time coordinate, is monotonic or damping oscillatory. At large distances from the sphere the fall-off of the sphere-induced VEVs, as functions of the geodesic distance, is exponential for both massless and massive fields.
description: 40 pages, 10 figures
Information cohomology of classical vector-valued observables
Creators: name: Vigneaux, Juan Pablo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Category Theory (math.CT)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94A17, 18G90

description: We provide here a novel algebraic characterization of two information measures associated with a vector-valued random variable, its differential entropy and the dimension of the underlying space, purely based on their recursive properties (the chain rule and the nullity-rank theorem, respectively). More precisely, we compute the information cohomology of Baudot and Bennequin with coefficients in a module of continuous probabilistic functionals over a category that mixes discrete observables and continuous vector-valued observables, characterizing completely the 1-cocycles; evaluated on continuous laws, these cocycles are linear combinations of the differential entropy and the dimension.
description: 10 pages, no figures. Conference paper (GSI2021)
Intrinsic room temperature ferromagnetism in Co-implanted ZnO
Creators: name: Akdogan, Numan
name: Nefedov, Alexei
name: Westerholt, Kurt
name: Zabel, Hartmut
name: Becker, H. Werner
name: Somsen, Christoph
name: Khaibullin, Rustam
name: Tagirov, Lenar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on the structural and magnetic properties of a cobalt-implanted ZnO film grown on a sapphire substrate. X-ray diffraction and transmission electron microscopy reveal the presence of a (10-10)-oriented hexagonal Co phase in the Al2O3 sapphire substrate, but not in the ZnO film. Co clusters, with a diameter of is about 5-6 nm, form a Co rich layer in the substrate close to the ZnO/Al2O3 interface. Magnetization measurements indicate that there exist two different magnetic phases in the implanted region. One originates from the Co clusters in Al2O3, the other one belongs to a homogeneous ferromagnetic phase with a ferromagnetic Curie temperature far above room temperature and can be attributed to Co substitution on Zn sites in the ZnO layer. We have observed magnetic dichroism at the Co L2,3 and O K edges at room temperature as well as the multiplet structure in x-ray absorption spectra around the Co L3 edge, supporting the intrinsic nature of the observed ferromagnetism in Co-implanted ZnO film. The magnetic moment per substituted cobalt is found about 2.81 Bohr magneton which is very close to the theoretical expected value of 3 Bohr magneton per Co atom for Co 2+ in its high spin state.
description: 9 pages, 14 figures
Fluctuation relations without microreversibility in nonlinear transport
Creators: name: Forster, H.
name: Buttiker, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In linear transport, the fluctuation-dissipation theorem relates equilibrium current correlations to the linear conductance coefficient. For nonlinear transport, there exist fluctuation relations that rely on Onsager's principle of microscopic reversibility away from equilibrium. However, both theory and experiments have shown deviations from microreversibility in the form of magnetic field asymmetric current-voltage relations. We present novel fluctuation relations for nonlinear transport in the presence of magnetic fields that relate current correlation functions at any order at equilibrium to response coefficients of current cumulants of lower order. We illustrate our results with the example of an electrical Mach-Zehnder interferometer.
description: 6 pages including 2 figures -- Two appendices contain material that is not in the Journal version: A) Derivation of the fluctuation relation; B) Symmetry point of the generating function
The Practice of Creating and Transforming a Business Model
Creators: name: Ahokangas, Petri
name: Myllykoski, Jenni
Publisher: name: Journal of Business Models
Year: 2014

description: Purpose: The paper explores the dynamics of business model creation and transformation as practices.

Design/methodology/approach: The paper is conceptual and exploratory in nature and builds on the practice / action learning approach.

Findings: The paper presents an action research based framework for approaching and understanding business model creation and transformation as practices. These practices are rooted in managerial and entrepreneurial experience through the exploration and exploitation of business opportunities and competitive advantages.

Practical implications: From a managerial and entrepreneurial perspective, the findings

of the paper highlight the role and dynamism of the business context and of continuous assessment of the business model in business model creation and transformation.

Originality/value: The paper proposes a novel framework for business model creation and transformation and sees them as practices. It also connects business models to opportunity and advantage exploration and exploitation.
description: Journal of Business Models, Vol 2 No 1 (2014): Special issue: The business model eruption
Choreutinae Stainton 1858
Creators: name: Pohl, Greg
name: Anweiler, Gary
name: Schmidt, Christian
name: Kondla, Norbert
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Choreutidae

description: Choreutinae 394 * R Anthophila alpinella (Busck, 1904) Jun M – – T: Dombroskie (2003) L: Bowman (1951) C: CNC, NFRC, UASM 395 * R Prochoreutis pernivalis (Braun, 1921) Jun – Jul M b g L: Bowman (1951) C: NFRC, UASM 396 * R Caloreas occidentella (Dyar, 1900) Jun – Jul M b – L: Bowman (1951), Pohl et al. (2004b) C: CNC, NFRC, OLDS, UASM 397 * R Caloreas multimarginata (Braun, 1925) M Jun – M Sep M – – L: Lafontaine and Wood (1997) C: CNC 398 * R Caloreas leucobasis (Dyar, 1900) Jun; Sep (H) M – – T: Dombroskie (2003) L:? Forbes (1923), Bowman (1951) C: UASM 399 * R Tebenna balsamorrhizella (Busck, 1904) Jul M – – L: Bowman (1951) C: CNC, NFRC 400 * R Tebenna onustana (Walker, 1864) Jun M – – T: Dombroskie (2003) L: Bowman (1951) C: CNC 401 * R H Choreutis diana (Hübner, 1819) Apr – May; M B – T: Dombroskie (2003) Aug – Sep (H) L: Bowman (1951), Prentice (1965), Pohl et al. (2004b) C: CNC, NFRC, PMAE, UASM 402 * R Choreutis sp. nr. myllerana (Fabricius, 1794) Jul – b g L: Bowman (1951) C: NFRC, UASM Tortricoidea
description: Published as part of Pohl, Greg, Anweiler, Gary, Schmidt, Christian & Kondla, Norbert, 2010, An annotated list of the Lepidoptera of Alberta, Canada, pp. 1-549 in ZooKeys 38 (38) on pages 94-95, DOI: 10.3897/zookeys.38.383, http://zenodo.org/record/576629
description: {"references": ["Dombroskie JJ (2003) Th e metalmark moths (Lepidoptera: Choreutidae) of Ontario. Ontario Lepidoptera 2002: 59 - 70.", "Bowman K (1951) An annotated list of the Lepidoptera of Alberta. Canadian Journal of Zoology 29: 121 - 165.", "Pohl GR, Langor DW, Landry J-F, Spence JR (2004 b) Lepidoptera of the Boreal Mixedwood Forest near Lac La Biche, Alberta, including new provincial records. Canadian Field-Naturalist 118: 530 - 549.", "Braun AF (1925) New Canadian microlepidoptera. Th e Canadian Entomologist 57: 124 - 127.", "Lafontaine JD, Wood DM (1997) Butterflies and moths (Lepidoptera) of the Yukon. In: Danks HV, Downes JA (Eds) Insects of the Yukon. Biological Survey of Canada (Terrestrial Arthropods), Ottawa, ON, 723 - 785.", "Forbes WTM (1923) Th e Lepidoptera of New York and neighboring states, Part I. Primitive forms, Microlepidoptera, Pyraloids, Bombyces. Cornell University Agricultural Experiment Station Memoirs 68: 1 - 729.", "Prentice RM (1965) Forest Lepidoptera of Canada reported by the Forest Insect Survey, Vol. 4: Microlepidoptera. Canada Dept. of Forestry, Publication No. 1142, pp. 544 - 840."]}
Figure S1 from Slaying the last unicorn: discovery of histones in the microalga Nanochlorum eucaryotum
Creators: name: Soo, Valerie W. C.
name: Warnecke, Tobias
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology

description: Figure S1. Alignment of N. eucaryotum (SAG 55.87) histone candidates with putative orthologs from select other eukaryotes. The alignment is not exhaustive in that it does not necessarily include all histone variants known from a given genome. Rather, canonical histones and variants of particular interest (e.g. H2A.Z) were chosen to allow targeted comparisons. Differentiating features (e.g. the extended acidic patch of H2A.Z) are highlighted. Alignments were built using MAFFT-linsi with default settings and visualized using Jalview. Protein IDs are from Uniprot and/or refer to Figure 1 and Table S1.
Rail Topology Ontology: A Rail Infrastructure Base Ontology
Creators: name: Bischof, Stefan
name: Schenner, Gottfried
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Engineering projects for railway infrastructure typically involve many subsystems which need consistent views of the planned and built infrastructure and its underlying topology. Consistency is typically ensured by exchanging and verifying data between tools using XML-based data formats and UML-based object-oriented models. A tighter alignment of these data representations via a common topology model could decrease the development effort of railway infrastructure engineering tools. A common semantic model is also a prerequisite for the successful adoption of railway knowledge graphs. Based on the RailTopoModel standard, we developed the Rail Topology Ontology as a model to represent core features of railway infrastructures in a standard-compliant manner. This paper describes the ontology and its development method, and discusses its suitability for integrating data of railway engineering systems and other sources in a knowledge graph. With the Rail Topology Ontology, software engineers and knowledge scientists have a standard-based ontology for representing railway topologies to integrate disconnected data sources. We use the Rail Topology Ontology for our rail knowledge graph and plan to extend it by rail infrastructure ontologies derived from existing data exchange standards, since many such standards use the same base model as the presented ontology, viz., RailTopoModel.
description: accepted at the International Semantic Web Conference'21 (ISWC 2021)
Fabrication and characterization of femtosecond laser written waveguides in chalcogenide glass
Creators: name: Hughes, M.
name: Yang, W.
name: Hewak, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The authors describe the fabrication of buried waveguides in a highly nonlinear chalcogenide glass, gallium lanthanum sulfide, using focused femtosecond laser pulses. Through optical characterization of the waveguides, they have proposed a formation mechanism and provide comparisons to previous work. Tunneling has been identified as the dominant nonlinear absorption mechanism in the formation of the waveguides. Single mode guidance at 633 nm has been demonstrated. The writing parameters for the minimum propagation loss of 1.47 dB/cm are 0.36 uJ pulse energy and 50 um/s scanning speed.
Conceptualising Business Models: Definitions, Frameworks and Classifications
Creators: name: Fielt, Erwin
Publisher: name: Journal of Business Models
Year: 2014

description: The business model concept is gaining traction in different disciplines but is still criticized for being fuzzy and vague and lacking consensus on its definition and compositional elements. In this paper we set out to advance our understanding of the business model concept by addressing three areas of foundational research: business model definitions, business model elements, and business model archetypes. We define a business model as a representation of the value logic of an organization in terms of how it creates and captures customer value. This abstract and generic definition is made more specific and operational by the compositional elements that need to address the customer, value proposition, organizational architecture (firm and network level) and economics dimensions. Business model archetypes complement the definition and elements by providing a more concrete and empirical understanding of the business model concept. The main contributions of this paper are (1) explicitly including the customer value concept in the business model definition and focussing on value creation, (2) presenting four core dimensions that business model elements need to cover, (3) arguing for flexibility by adapting and extending business model elements to cater for different purposes and contexts (e.g. technology, innovation, strategy) (4) stressing a more systematic approach to business model archetypes by using business model elements for their description, and (5) suggesting to use business model archetype research for the empirical exploration and testing of business model elements and their relationships.
description: Journal of Business Models, Vol 1 No 1 (2013): Inaugural issue
Editorial: The Business Model Eruption and How Game Changing Mind Sets Challenge Existing Nodes of Business
Creators: name: Nielsen, Christian
name: Ahokangas, Petri
name: Cöster, Mathias
name: Westelius, Alf
name: Iveroth, Einar
name: Petri, Carl-Johan
Publisher: name: Journal of Business Models
Year: 2014

description: Journal of Business Models, Vol 2 No 1 (2014): Special issue: The business model eruption
SOC(HE)-Italy: a classification for graduate occupations
Creators: name: Cattani, Luca
name: Purcell, Kate
name: Elias, Peter
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: SECS-P/01 Economia politica

description: This paper presents an application to the Italian labour force of the British SOC(HE)2010 classification for graduate occupations, thereby creating a statistical tool for exploration of the Italian graduate labour market. In order to achieve this goal, the classification is replicated, using methodology that differs slightly to take account of differences in existing Italian data, to construct SOC(HE)-Italy. This classification allocates each of the official 800 Italian occupational categories to four groups distinguishing between ‘graduate’ and ‘non-graduate’ groups on the basis of their relative levels of knowledge and skills requirements. It is then validated using the Rilevazione Continua sulle Forze di Lavoro (RCFL ISTAT) data and the AlmaLaurea (AL) data and used to analyze changes in the Italian occupational structure that occurred before and after the financial crisis that took place in 2008. We also compare the Italian structural trends in the graduate labour market with similar trends in Britain. This analysis reveals that the decrease in the utilization of highly qualified labour in the Italian labour market started before the beginning of the ongoing recession, which contradicts the findings of analyses reported in earlier literature.
Coherent nu-N scattering and the search for physics beyond the standard model
Creators: name: Barranco, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We focus in future proposals to measure coherent neutrino-nuclei scattering and we show that such kind of experiments are very sensitive to nonstandard neutrino interactions with quarks. First in a model independent parametrization and then we focused in particular models such as leptoquarks and models with extra neutral gauge bosons and with R-parity breaking interactions. We show that in all these three different types of new physics it is possible to obtain competitive bounds to those of future collider experiments. For the particular case of leptoquarks we found that the expected sensitivity to the coupling and mass for most of the future experimental setups is quite better than the current constraints.
description: 6 pages, 1 Figure, Talk given at 11th Mexican Workshop on Particles and Fields 2007, Tuxtla Gutierrez, Mexico, 7-12 Nov 2007
European ALMA operations: the interaction with and support to the users
Creators: name: Andreani, Paola
name: Zwaan, Martin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Atacama Large Millimetre/submillimetre Array (ALMA) is one of the largest and most complicated observatories ever built. Constructing and operating an observatory at high altitude (5000m) in a cost effective and safe manner, with minimal effect on the environment creates interesting challenges. Since the array will have to adapt quickly to prevailing weather conditions, ALMA will be operated exclusively in service mode. By the time of full science operations, the fundamental ALMA data product shall be calibrated, deconvolved data cubes and images, but raw data and data reduction software will be made available to users as well. User support is provided by the ALMA Regional Centres (ARCs) located in Europe, North America and Japan. These ARCs constitute the interface between the user community and the ALMA observatory in Chile. For European users the European ARC is being set up as a cluster of nodes located throughout Europe, with the main centre at the ESO Headquarters in Garching. The main centre serves as the access portal and in synergy with the distributed network of ARC nodes, the main aim of the ARC is to optimize the ALMA science output and to fully exploit this unique and powerful facility. The aim of this article is to introduce the process of proposing for observing time, subsequent execution of the observations, obtaining and processing of the data in the ALMA epoch. The complete end-to-end process of the ALMA data flow from the proposal submission to the data delivery is described.
description: 7 pages, three figures
Fourier analyses of commensurability oscillations in Fibonacci lateral superlattices
Creators: name: Endo, Akira
name: Iye, Yasuhiro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetotransport measurements have been performed on Fibonacci lateral superlattices (FLSLs) -- two-dimensional electron gases subjected to a weak potential modulation arranged in the Fibonacci sequence, LSLLSLS..., with L/S=tau (the golden ratio). Complicated commensurability oscillation (CO) is observed, which can be accounted for as a superposition of a series of COs each arising from a sinusoidal modulation representing the characteristic length scale of one of the self-similar generations in the Fibonacci sequence. Individual CO components can be separated out from the magnetoresistance trace by performing a numerical Fourier band-pass filter. From the analysis of the amplitude of a single-component CO thus extracted, the magnitude of the corresponding Fourier component in the potential modulation can be evaluated. By examining all the Fourier contents observed in the magnetoresistance trace, the profile of the modulated potential seen by the electrons can be reconstructed with some remaining ambiguity about the interrelation of the phase between different components.
description: 11 pages, 10 figures, added references in Introduction, minor revisions
Value Creation Challenges in Multichannel Retail Business Models
Creators: name: Yrjölä, Mika
Publisher: name: Journal of Business Models
Year: 2014

description: Purpose: The purpose of the paper is to identify and analyze the challenges of value creation in multichannel retail business models.

Design/methodology/approach: With the help of semi-structured interviews with top executives from different retailing environments, this study introduces a model of value creation challenges in the context of multichannel retailing. The challenges are analyzed in terms of three retail business model elements, i.e., format, activities, and governance.

Findings: Adopting a multichannel retail business model requires critical rethinking of the basic building blocks of value creation. First of all, as customers effortlessly move between multiple channels, multichannel formats can lead to a mismatch between customer and firm value. Secondly, retailers face pressures to use their activities to form integrated total offerings to customers. Thirdly, multiple channels might lead to organizational silos with conflicting goals. A careful orchestration of value creation is needed to determine the roles and incentives of the channel parties involved.

Research limitations/implications: In contrast to previous business model literature, this study did not adopt a network-centric view. By embracing the boundary-spanning nature of the business model, other challenges and elements might have been discovered (e.g., challenges in managing relationships with suppliers).

Practical implications: As a practical contribution, this paper has analyzed the challenges retailers face in adopting multichannel business models. Customer tendencies for showrooming behavior highlight the need for generating efficient lock-in strategies. Customized, personal offers and information are ways to increase customer value, differentiate from competition, and achieve lock-in.

Originality/value: As a theoretical contribution, this paper empirically investigates value creation challenges in a specific context, lowering the level of abstraction in the mostly-conceptual business model literature.
description: Journal of Business Models, Vol 2 No 1 (2014): Special issue: The business model eruption
title: Youth Work in a Pandemic: The Shaping of a Service Through the Lockdowns
Creators: name: Warner, Elise
Publisher: name: University of Kent
Year: 2025

description: Youth work within England was disproportionately impacted by austere policies from 2010 through to the start of the COVID-19 pandemic. These financial cuts occurred alongside an expectation for youth services to take a targeted approach to youth work and consider vulnerabilities within young people. The current project began during the lockdown phases of the COVID-19 pandemic. This thesis examined the role of one local authority in England, anonymised as ‘’Sunshine’’ Youth Service, through the COVID-19 pandemic. Data collection consisted of 25 in depth semi-structured interviews across the lockdown phases, as well as observation of staff meetings within the Sunshine area. This thesis sought to answer questions related to Sunshine Youth Service during the COVID-19 pandemic. These research questions specifically contribute to wider academic narratives pertaining to youth work through the consideration of the relationship between youth work and austerity, contextualisation within a critical realist perspective, a novel conceptualisation of the youth services’ reflexive approach to vulnerability, and a new way to interpret the space in which services are delivered. These elements work together to demonstrate the reality of working within Sunshine Youth Services through the precarity of a pandemic, the ways in which previous years of austerity may have prepared the youth workers to do so and considers how these may impact youth work in the future.
Effects of turbulent mixing on the nonequilibrium critical behaviour
Creators: name: Antonov, N. V.
name: Iglovikov, V. I.
name: Kapustin, A. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study effects of turbulent mixing on the critical behaviour of a nonequilibrium system near its second-order phase transition between the absorbing and fluctuating states. The model describes the spreading of an agent (e.g., infectious disease) in a reaction-diffusion system and belongs to the universality class of the directed bond percolation process, also known as simple epidemic process, and is equivalent to the Reggeon field theory. The turbulent advecting velocity field is modelled by the Obukhov--Kraichnan's rapid-change ensemble: Gaussian statistics with the correlation function < vv> \propto δ(t-t') k^{-d-ξ}, where k is the wave number and 0
description: 20 pages, IOPLATeX source with 8 EPS figures
Three-Dimensional Doppler Images of the Disk-like and Stream-like States of U Coronae Borealis
Creators: name: Agafonov, Michail
name: Sharova, Olga
name: Richards, Mercedes
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The 3D Radioastronomical Approach to Doppler tomography has been used to study the H$α$ emission sources in U Coronae Borealis. These 3D tomograms provide greater resolution than the projected 2D version and highlight the jet-like gas flows in the $V_z$ direction transverse to the orbital plane. In this paper, the 3D tomograms are compared at two distinct epochs when U CrB was in the disk-like state (1993 data) and the stream-like state (1994 data). Both states display a prominent emission source, the circumprimary bulge, which is produced when the gas stream strikes the photosphere of the mass-gainer. This source is detected within $V_z$ = $\pm$150 km s{$^{-1}$}, and demonstrates that the bulge is not confined to the orbital plane although it achieves maximum strength near $V_z$=0 km s{$^{-1}$}. Other emission sources include the stream-star and stream-disk shocks and a Localized Region (LR) where the circling disk material strikes the incoming gas stream. The LR has $V_z$ velocities of 200 to 500 km s{$^{-1}$} in the disk-like state. The disk emission is seen over a range of $V_z$ velocities, and there is evidence that the disk is inclined to the orbital plane or may have two arms. The gas stream flows along its predicted trajectory in the stream-like state, and a comparison with the disk-like state suggests that the gas stream has a higher density than the disk in both states of this binary.
description: 17 pages, 9 figures, submitted to ApJ
Biomedical applications of Gold Nanoparticles and their potential implications in drug delivery
Creators: name: CHAUDHARY, UDIT
name: Dixit, Rekha
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 300101
subject: Agricultural biotechnology diagnostics (incl. biosensors)
classificationCode: 300105
subject: Genetically modified field crops and pasture

description: Nanotechnology is an interdisciplinary field of medicine, chemistry, physics, and biology that has emerged during the past few decades as a potential area of study. The goal of this interdisciplinary technology is to transform molecules into entities, then do the opposite. Nanobiotechnology is the term for the fusion of nanotechnology with biotechnology. In nanobiotechnology nanoscale principles and techniques are used to explore biosystems and generate novel biomaterials. Biosensing, cell labelling, and molecular imaging can all benefit from nanostructure materials in life science, health, and biomedicine.
Towards a systematic treatment of observational uncertainties in forward asteroseismic modelling of gravity-mode pulsators
Creators: name: Bowman, Dominic M.
name: Michielsen, Mathias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. In asteroseismology the pulsation mode frequencies of a star are the fundamental data that are compared to theoretical predictions to determine a star's interior physics. Recent significant advances in the numerical, theoretical and statistical asteroseismic methods applied to main sequence stars with convective cores have renewed the interest in investigating the propagation of observational uncertainties within a forward asteroseismic modelling framework. Aims. We aim to quantify the impact of various choices made throughout the observational aspects of extracting pulsation mode frequencies in main sequence stars with gravity modes. Methods. We use a well-studied benchmark slowly pulsating B star, KIC 7760680, to investigate the sensitivity of forward asteroseismic modelling to various sources of observational uncertainty that affect the precision of the input pulsation mode frequencies. Results. We quantify the impact of the propagation of the observational uncertainties involved in forward asteroseismic modelling. We find that one of the largest sources of uncertainty in our benchmark star is in the manual building of period spacing patterns, such that the inclusion of a potentially ambiguous pulsation mode frequency may yield differences in model parameters of up to 10% for mass and age depending on the radial order of the mode. Conclusions. We conclude that future asteroseismic studies of main sequence stars with a convective core should quantify and include observational uncertainties introduced by the light curve extraction, iterative pre-whitening and the building of period spacing patterns, as these propagate into the final modelling results.
description: 21 pages, proposed for acceptance for publication in A&A
Recent Structural Evolution of Early-Type Galaxies: Size Growth from z=1 to z=0
Creators: name: van der Wel, Arjen
name: Holden, Bradford P.
name: Zirm, Andrew W.
name: Franx, Marijn
name: Rettura, Alessandro
name: Illingworth, Garth D.
name: Ford, Holland C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Strong size and internal density evolution of early-type galaxies between z~2 and the present has been reported by several authors. Here we analyze samples of nearby and distant (z~1) galaxies with dynamically measured masses in order to confirm the previous, model-dependent results and constrain the uncertainties that may play a role. Velocity dispersion measurements are taken from the literature for 50 morphologically selected 0.8
description: Minor changes to match journal version; 13 pages, 7 figures
Constraints on unparticle physics from the $gt\bar t$ anomalous coupling
Creators: name: Martinez, R.
name: Pérez, M. A.
name: Sampayo, O. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the impact of unparticle physics to the chromomagnetic dipole moment (CMDM) of the top quark. We compute the effect induced by unparticle operators of scalar and vector nature coupled to fermions on the CMDM. We find that this dipole moment is sensitive to the scale dimensions $d_u$ of the unparticle and the new couplings of the respective effective operators. Using the bounds imposed on the CMDM by low-energy precision and Tevatron measurements we derive indirect limits on the unparticle parameter space. In particular, we find that the scalar-unparticle operator contribution fulfills both constraints for most of the unparticle parameter space, while the low-energy precision bound on the CMDM excludes a vector-unparticle contribution for low values of respective scale dimension $d_u$.
description: 8 pages, 4 figures
Nightmare distress, beliefs about nightmares, and waking-life anxiety
Creators: name: Schredl, Michael
Publisher: name: International Journal of Dream Research
Year: 2025

description: For the diagnosis of a nightmare disorder, the person should report clinically significant distress due to nightmares. Thus, research should focus on understanding the factors that might contribute to nightmare distress – in addition to the most obvious one, nightmare frequency. Overall, 285 persons (221 women, 60 men, 4 non-binary persons) with a mean age of 24.00 ± 5.51 years participated in the study. The findings of the present study indicated – as expected – that beliefs about nightmares, gender, and anxiety contribute independently – in addition to nightmare frequency – to nightmare distress. Identifying factors that are associated with being vulnerable to nightmare distress, can inform clinicians to better diagnose and treat persons who suffer from nightmares.
description: International Journal of Dream Research, Vol 18, No 1 (April 2025)
Structure and phase equilibria of the Widom-Rowlinson model
Creators: name: Brader, J. M.
name: Vink, R. L. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The Widom-Rowlinson model plays an important role in the statistical mechanics of second order phase transitions and yet there currently exists no theoretical approach capable of accurately predicting both the microscopic structure and phase equilibria. We address this issue using computer simulation, density functional theory and integral equation theory. A detailed study of the pair correlation functions obtained from computer simulation motivates a closure of the Ornstein-Zernike equations which gives a good description of the pair structure and locates the critical point to an accuracy of 2 percent.
Elliptic Curves, Algebraic Geometry Approach in Gravity Theory and Uniformization of Multivariable Cubic Algebraic Equations
Creators: name: Dimitrov, Bogdan G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Based on the distinction between the covariant and contravariant metric tensor components in the framework of the affine geometry approach and the s.c. "gravitational theories with covariant and contravariant connection and metrics", it is shown that a wide variety of third, fourth, fifth, seventh, tenth- degree algebraic equations exists in gravity theory. This is important in view of finding new solutions of the Einstein's equations, if they are treated as algebraic ones. Since the obtained cubic algebraic equations are multivariable, the standard algebraic geometry approach for parametrization of two-dimensional cubic equations with the elliptic Weierstrass function cannot be applied. Nevertheless, for a previously considered cubic equation for reparametrization invariance of the gravitational Lagrangian and on the base of a newly introduced notion of "embedded sequence of cubic algebraic equations", it is demonstrated that in the multivariable case such a parametrization is also possible, but with complicated irrational and non-elliptic functions. After finding the solutions of a system of first - order nonlinear differential equations, these parametrization functions can be considered also as uniformization ones (depending only on the complex uniformization variable z) for the initial multivariable cubic equation.
description: 23 pages, no figures, this is a part of hep-th/0511136 (in memory of Prof. Sawa S. Manoff), but with Sections 2 and 3 rewritten and expanded; version, accepted for publication in Int. J. Geom. Meth. Mod. Phys.; to appear in vol. 5, iss. 5 (August 2008)
Review of Gregory and Michaelian (eds.) Dreaming and Memory: Philosophical Issues
Creators: name: Cowan, Robert
Publisher: name: International Journal of Dream Research
Year: 2025

description: Daniel Gregory and Kourken Michaelian’s edited volume Dreaming and Memory: Philosophical Issues is a very welcome development in what has been an area of intersection hitherto neglected in analytic philosophy. The book, the first of its kind, brings together philosophers of memory, dreaming, and of mind more generally, and is organised into three parts. The first explores the topic of remembering dreams, the second on the issue of whether dreaming ever involves memory, and the final part contains various comparisons between dreaming and memory. I here provide an overview of the book then some brief concluding thoughts of my own.
description: International Journal of Dream Research, Vol 18, No 1 (April 2025)
Influence of Band and Orbital Degeneracies on Ferromagnetism in the Periodic Anderson Model
Creators: name: Yu, Unjong
name: Byczuk, Krzysztof
name: Vollhardt, Dieter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the influence of degeneracies of the conduction band and the $f$-orbital on the stability of ferromagnetism in the periodic Anderson model. To this end we calculate the temperature dependence of the inverse susceptibility for different degeneracies $D^c, D^f$ and conduction electron densities $n^c$ within the dynamical mean-field theory. A strong increase of the Curie temperature $T_c$ with the degeneracy $D^f$ of the localized $f$-level is found. For $D^c \leq D^f$ a simple \emph{ansatz} based on a mean-field treatment of the RKKY interaction is shown to imply a scaling behavior of $T_c$ as a function of the conduction electron density per band which is well obeyed by the numerical results. In particular, $T_c$ is found to have a maximum at $n^c / D^c\approx 0.3$.
description: 5 pages, 4 figures (accepted for publication in Phys. Rev. B)
Introducing online dreamwork during the COVID-19 pandemic: Method, training, and impact
Creators: name: Sparrow, Gregory Scott
name: Yih-Jiun (Jean) Shen
name: Pintor, Marilu
Publisher: name: International Journal of Dream Research
Year: 2025

description: In early 2020, the COVID-19 pandemic forced the Counseling and Training Clinics of the University of Texas Rio Grande Valley (UTRGV) to shut down. Consequently, our graduate counseling program students needed help accruing the direct counseling hours required by their degree programs. Without an established telehealth option, the UTRGV Counseling Department supported the creation of DreamStar Free Online Counseling (DFOC), an online counseling program facilitated through Zoom video. In response to our students' urgent need for clients, we added individual and group dreamwork to DFOC's array of services, increasing the referral level. This paper describes the creation of DFOC, the introduction of "co-creative" dreamwork to DFOC's services, the training and group leadership model that we adopted, and a pilot study we conducted to assess the level of risk and benefits in introducing online dreamwork conducted by recently trained student counselors.
description: International Journal of Dream Research, Vol 18, No 1 (April 2025)
“I don’t like Mondays”: Weekdays in a long dream series
Creators: name: Schredl, Michael
Publisher: name: International Journal of Dream Research
Year: 2025

description: Whereas many dream studies focus on topics like dream characters and social interaction, the present analysis of a long dream series (N = 14,233 dreams) analyzed the occurrence of weekdays in dreams. Interestingly, there was a clear preferences of weekend days (Saturday, Sunday) compared to workdays (hence the title of the article). Moreover, work-related topics were significant more likely to occur in dreams with workday references compared to dreams with weekend references. The high occurrence of weekend days in dream might be associated with a higher salience of weekend-related activities. To summarize, studying “mundane” dream aspects like time of the day, weekdays, seasons and so on might be helpful in developing a more elaborated version of the continuity hypothesis.
description: International Journal of Dream Research, Vol 18, No 1 (April 2025)
Structural precursor to freezing: An integral equation study
Creators: name: Brader, J. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recent simulation studies have drawn attention to the shoulder which forms in the second peak of the radial distribution function of hard-spheres at densities close to freezing and which is associated with local crystalline ordering in the dense fluid. We address this structural precursor to freezing using an inhomogeneous integral equation theory capable of describing local packing constraints to a high level of accuracy. The addition of a short-range attractive interaction leads to a well known broadening of the fluid-solid coexistence region as a function of attraction strength. The appearence of a shoulder in our calculated radial distribution functions is found to be consistent with the broadened coexistence region for a simple model potential, thus demonstrating that the shoulder is not exclusively a high density packing effect.
Shifting Body Perception: How Amputation Alters Dream Imagery
Creators: name: Peters, Emma
name: Urwyler, Line
name: Erlacher, Daniel
Publisher: name: International Journal of Dream Research
Year: 2025

description: Recent neuroscience advances emphasize the complex relationship between the physical body and dreams during sleep, as these two bodies share many neurological and physiological components. Understanding how significant bodily changes, like amputations, affect dream body perception opens a window to investigate the contribution of memory and somatosensory processing in dream formation. This sleep laboratory PSG study aimed to collect dream reports from amputees through REM awakenings and assess the subjective body perception in their dreams. We compared these results with dream content from two control populations experiencing temporary body perception changes: muscle soreness and electrical muscle stimulation (EMS). The dream reports indicate mixed body perception, both as an intact body and post-amputation, especially in recent amputees. In addition, more temporary changes in body perception, such as those from muscle soreness and EMS, are represented differently in dreams compared to the dreams of amputees. The research suggests recent amputees, who might be more involved in psychological coping with the novel change in body configuration, dream more about their own body, pre- or post-amputation. Amputees’ dreams are less movement- and body-focused compared to the dreams of people with temporary body changes, likely reflecting adaptation to the new body schema over time. This study contributes to ongoing research into the relationship between the physical and dreamed body by further addressing the subjective dream experience of amputees.
description: International Journal of Dream Research, Vol 18, No 1 (April 2025)
A Limit Theorem for Products of Free Unitary Operators
Creators: name: Kargin, Vladislav
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L54

description: This paper establishes necessary and sufficient conditions for the products of freely independent unitary operators to converge in distribution to the uniform law on the unit circle.
description: 21 page
Review of exhibition Le temps d’un rêve / In the space of a dream, at Musée des Confluences, Lyon, France – 18th October 2024 to 24th August 2025.
Creators: name: Ruby, Perrine
name: Lockheart, Julia
name: Blagrove, Mark
Publisher: name: International Journal of Dream Research
Year: 2025

description: Possibly the largest ever exhibition on dreaming, Le temps d’un rêve / In the space of a dream, is on show at the Musée des Confluences in Lyon, France, from 18th October 2024 to 24th August 2025. As scientific consultant for the exhibition and/or contributors we review its massive collection of neuroscience, cross-cultural artifacts, art, film and dream diary exhibits. The exhibition covers the science of dreaming, responses to and induction of dreams across different cultures and centuries, artistic representation of individual dreams and of oneiric processes, and the relating of dreams in diaries, surveys or for artistic endeavour (e.g. films) showing what can be at stake in individual and collective dream reports. The exhibition is divided into a series of very high quality environments designed to reproduce the various spatial or historical atmospheres presented. They incorporate visual and scholarly information next to each of the very many artifacts, artworks, films, sound beds and wall art. Spending several hours at the exhibition is greatly recommended for anyone interested in dreams and dreaming.
description: International Journal of Dream Research, Vol 18, No 1 (April 2025)
Towards a realistic axion star
Creators: name: Barranco, J.
name: Bernal, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this work we estimate the radius and the mass of a self-gravitating system made of axions. The quantum axion field satisfies the Klein-Gordon equation in a curved space-time and the metric components of this space-time are solutions to the Einstein equations with a source term given by the vacuum expectation value of the energy-momentum operator constructed from the axion field. As a first step towards an axion star we consider the up to the sixth term in the axion potential expansion. We found that axion stars would have masses of the order of asteroids and radius of the order of few centimeters.
description: 3 pages, 1 Figure, To appear in the proceedings of 11th Mexican Workshop on Particles and Fields 2007, Tuxtla Gutierrez, Mexico, 7-12 Nov 2007