cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
XMM-Newton Observations of Three Interacting Luminous Infrared Galaxies
Creators: name: Mudd, Dale
name: Mathur, Smita
name: Guainazzi, Matteo
name: Piconcelli, Enrico
name: Bianchi, Stefano
name: Komossa, Stefanie
name: Vignali, Cristian
name: Lanzuisi, Giorgio
name: Nicastro, Fabrizio
name: Fiore, Fabrizio
name: Maiolino, Roberto
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the X-ray properties of three interacting luminous infrared galaxy systems. In one of these systems, IRAS 18329+5950, we resolve two separate sources. A second, IRAS 20550+1656, and third, IRAS 19354+4559, have only a single X-ray source detected. We compare the observed emission to PSF profiles and determine that three are extended in emission. One is compact, which is suggestive of an AGN, although all of our profiles have large uncertainties. We then model the spectra to determine soft (0.5--2 keV) and hard (2--10 keV) luminosities for the resolved sources and then compare these to relationships found in the literature between infrared and X-ray luminosities for starburst galaxies. We obtain luminosities of $\log(L_{\textrm{soft}}/\textrm{L}_{\odot}) = 7.32,\:7.06,\:7.68$ and $\log(L_{\textrm{hard}}/\textrm{L}_{\odot}) = 7.33,\: 7.07,\: 7.88$ for IRAS 18329+5950, IRAS 19354+4559, and IRAS 20550+1656, respectively. These are intermediate to two separate predictions in the literature for star-formation-dominated sources. Our highest quality spectrum of IRAS 20550+1656 suggests super-solar abundance of alpha elements at $2σ$ significance, with $\log(\fracα{α_{\odot}}) = [α] = 0.4\pm0.2$. This is suggestive of recent enrichment with Type II supernovae, consistent with a starburst environment. The X-ray properties of the target galaxies are most likely due to starbursts, but we cannot conclusively rule out AGN.
description: Updated with substantial changes to match journal version. For a brief video summary of the original version of the paper, see http://www.youtube.com/watch?v=bOD6wLCtkIE
How recording 'shattered' representation: The emergence and transformation of musical short films
Creators: name: Douglas, James
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 360501
subject: Cinema studies
classificationCode: 360505
subject: Screen media

description: "This project embraces a combination of cultural studies and historical approaches in an examination of the emergence of audiovisuality through developments in recording technologies (particularly those that separated and attempted to re-synchronise sounds and images) near the end of the nineteenth and into the early/mid-twentieth centuries." -- abstract
Affine Wa(A4), Quaternions, and Decagonal Quasicrystals
Creators: name: Koca, Mehmet
name: Koca, Nazife O.
name: Koc, Ramazan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We introduce a technique of projection onto the Coxeter plane of an arbitrary higher dimensional lattice described by the affine Coxeter group. The Coxeter plane is determined by the simple roots of the Coxeter graph I2 (h) where h is the Coxeter number of the Coxeter group W(G) which embeds the dihedral group Dh of order 2h as a maximal subgroup. As a simple application we demonstrate projections of the root and weight lattices of A4 onto the Coxeter plane using the strip (canonical) projection method. We show that the crystal spaces of the affine Wa(A4) can be decomposed into two orthogonal spaces whose point groups is the dihedral group D5 which acts in both spaces faithfully. The strip projections of the root and weight lattices can be taken as models for the decagonal quasicrystals. The paper also revises the quaternionic descriptions of the root and weight lattices, described by the affine Coxeter group Wa(A3), which correspond to the face centered cubic (fcc) lattice and body centered cubic (bcc) lattice respectively. Extensions of these lattices to higher dimensions lead to the root and weight lattices of the group Wa(An), n>=4 . We also note that the projection of the Voronoi cell of the root lattice of Wa(A4) describes a framework of nested decagram growing with the power of the golden ratio recently discovered in the Islamic arts.
description: 26 pages, 17 figures
Does the enhancement observed in $γγ\to D\bar{D}$ contain two $P$-wave higher charmonia?
Creators: name: Chen, Dian-Yong
name: He, Jun
name: Liu, Xiang
name: Matsuki, Takayuki
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Solved is a new puzzle raised by the observation of an enhancement structure Z(3930) in $γγ\to D\bar{D}$. If categorizing Z(3930) as $χ_{c2}(2P)$ suggested by Belle and BaBar, we must explain why $χ_{c0}(2P)$ dominantly decaying into $D\bar{D}$ is missing in the $D\bar{D}$ invariant mass spectrum. In this work, we propose that the Z(3930) enhancement structure may contain two $P$-wave higher charmonia {$χ_{c0}(2P)$} and $χ_{c2}(2P)$. We show that this assumption is supported by our analysis of the $D\bar{D}$ invariant mass spectrum and $\cosθ^\ast$ distribution of $γγ\to D\bar{D}$. This observation would not only provide valuable information of two P-wave higher charmonia $χ_{c0}(2P)$ and $χ_{c2}(2P)$, but also serve as the crucial test of our novel proposal to the observed enhancement structure Z(3930), especially at the forthcoming BelleII and the approved SuperB.
description: 5 pages, 2 tables, 3 figures. More contents and discussions added
Electrochemical characterisation of a unique rotating parallel disc device for flow-accelerated corrosion research
Creators: name: Mcneilly, Ian
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 340603
subject: Colloid and surface chemistry

description: "This thesis presents the electrochemical characterisation of a novel device that has been designed to facilitate the study of flow-accelerated corrosion (FAC) at a metal electrode under high shear rate flow conditions"--P. 1.
Physiological trade-offs to thermal acclimation by symbiont community change in the reef coral Acropora Millepora
Creators: name: Jones, Alison
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 310913
subject: Invertebrate biology

description: Study "examines some aspects of key aspects of the physiology and photobiology of a common and abundant reef-building coral A. millepora in the Keppel region of the southern Great Barrier Reef that typically hosts symbionts with contrasting thermal tolerance"--Abstract.
Outlook for detection of GW inspirals by GRB-triggered searches in the Advanced detector era
Creators: name: Dietz, Alexander
name: Fotopoulos, Nickolas
name: Singer, Leo
name: Cutler, Curt
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Short, hard gamma-ray bursts (GRBs) are believed to originate from the coalescence of two neutron stars (NSs) or a NS and a black hole (BH). If this scenario is correct, then short GRBs will be accompanied by the emission of strong gravitational waves (GWs), detectable by GW observatories such as LIGO, Virgo, KAGRA, and LIGO-India. As compared with blind, all-sky, all-time GW searches, externally triggered searches for GW counterparts to short GRBs have the advantages of both significantly reduced detection threshold due to known time and sky location and enhanced GW amplitude because of face-on orientation. Based on the distribution of signal-to-noise ratios in candidate compact binary coalescence events in the most recent joint LIGO-Virgo data, our analytic estimates, and our Monte Carlo simulations, we find an effective sensitive volume for GRB-triggered searches that is about 2 times greater than for an all-sky, all-time search. For NS-NS systems, a jet angle of 20 degrees, a gamma-ray satellite field of view of 10% of the sky, and priors with generally precessing spin, this doubles the number of NS-NS short-GRB and NS-BH short-GRB associations, to ~3-4% of all detections of NS-NSs and NS-BHs. We also investigate the power of tests for statistical excesses in lists of subthreshold events, and show that these are unlikely to reveal a subthreshold population until finding GW associations to short GRBs is already routine. Finally, we provide useful formulas for calculating the prior distribution of GW amplitudes from a compact binary coalescence, for a given GW detector network and given sky location.
description: 14 pages, 4 figures, published in PRD; this version includes changes in final copyedited article
The Dreamtime Cultural Centre: A grounded theory of doing business in an Indigenous tourism enterprise
Creators: name: Radel, Kylie
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 350899
subject: Tourism not elsewhere classified

description: The Dreamtime Cultural Centre in Central Queensland began operation in Australia's Bicentennial year, 1988. Over the 22 years of its operation, the enterprise has grown to provide a range of services and facilities including the original cultural tours, three venues for conference facilities, a 31 room motel, restaurant and conference centre, a SkillShare Hospitality Training Centre, kiosk, Bimbi Artefact Shop and a theatrette. The grounded theory model accounting for the success of the Dreamtime Cultural Centre demonstrates complex and highly interdependent processes. As an Indigenous tourism enterprise, the Centre is structured to reflect and reinforce the integration of social structures and processes that accommodate the dynamics and relationships arising from the cultural mores, traditions and expectations of a complex community. The success factors incorporate adaptations of Western organisational principles and concepts characteristic of small-medium enterprises overlaid against Indigenous foundations of family structures, kinship roles, traditions, cultures and heritages. There are two critical factors that underpin and drive success for the enterprise: the constructs of the 'Family' and the 'Entrepreneur'. The core of the enterprise is grounded in the Family relationships, connectedness and kinship frameworks which reflect Indigenous Australians' ways of being and doing. These frameworks are reflected in the organisational structure, organisational culture and rules guiding practices and processes respectively.
Patterns of growth and investment in the Mount Morgan Mine from 1929 to 1990
Creators: name: Boyle, Ray Francis
Publisher: name: CQUniversity
Year: 2022
Subjects: classificationCode: 430399
subject: Historical studies not elsewhere classified

description: The Mount Morgan Mine closed in November 1990 after operating for one hundred and eight years under the control of only two companies. It is the second company, Mount Morgan Limited, incorporated in 1929, which will be considered in this thesis and periods of significance in the sixty one year history of this Company will be studied in separate chapters after an introductory historiographical survey. The principal histories written by John Kerr and Lorna McDonald about Mount Morgan deal only with the events themselves and make no attempts to study in depth the reasons for them.
Effective communication of biodiversity: The Landcare experience
Creators: name: Cameron, GL
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 300202
subject: Agricultural land management

description: "The purpose of this project was to explore how effectively the term 'biodiversity' was communicated to rural landholders in Tasmania in the last years of the 1990s. More specifically the project was designed to establish whether the principles and meaning of biodiversity were communicated to Landcare groups, as intended by national and state agencies, through Landcare advisory bodies, the media and other sources." -- abstract.
Reviewing the Energy Semantic Artefacts Landscape
Creators: name: Jones, Catherine
name: VanHaltren, Karen
name: Zoldoske, Teagan
Publisher: name: UKERC
Year: 2025

description: Being able to use common terminology helps in the discovery, use and reuse of objects in the energy sphere. The FAIR (Findable, Accessible, Interoperable and Reusable) principles [1] specify the use of domain specific common terminology which can be referenced and accessed by machine. The first interoperable principle states that “(meta)data use a formal, accessible, shared, and broadly applicable language for knowledge representation.” In the EDC’s current assessment of adherence to the FAIR principles [2] this is currently not met. There are two purposes for this work: firstly to establish if there is a single semantic artefact that satisfies this criteria for the energy community and secondly to identify possible candidates that would improve the current classification schemes in use.
The Minimal Work Cost of Information Processing
Creators: name: Faist, Philippe
name: Dupuis, Frédéric
name: Oppenheim, Jonathan
name: Renner, Renato
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Irreversible information processing cannot be carried out without some inevitable thermodynamical work cost. This fundamental restriction, known as Landauer's principle, is increasingly relevant today, as the energy dissipation of computing devices impedes the development of their performance. Here we determine the minimal work required to carry out any logical process, for instance a computation. It is given by the entropy of the discarded information conditional to the output of the computation. Our formula takes precisely into account the statistically fluctuating work requirement of the logical process. It enables the explicit calculation of practical scenarios, such as computational circuits or quantum measurements. On the conceptual level, our result gives a precise and operationally justified connection between thermodynamic and information entropy, and explains the emergence of the entropy state function in macroscopic thermodynamics.
description: Journal version; 6+3+25 pages, 4+3 figures; previously "A Quantitative Landauer's Principle"
Reduction of CO² emissions in coal-fired power plants for achieving a sustainable environment
Creators: name: Moazzem, Shadia
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 401199
subject: Environmental engineering not elsewhere classified
classificationCode: 401703
subject: Energy generation, conversion and storage (excl. chemical and electrical)

description: "This study analysed mineral carbonation technology with the aim of integrating it into an existing coal-fired power plant."--Abstract.
Gauge Invariant Descriptions of Gluon Polarizations
Creators: name: Guo, Zhi-Qiang
name: Schmidt, Ivan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose methods to construct gauge invariant decompositions of the nucleon spin, particularly gauge invariant descriptions of the gluon polarization. We show that gauge invariant decompositions of the nucleon spin can be derived naturally from the conserved current of a generalized Lorentz transformation by the Noether theorem. We propose a gauge invariant extension of the Chern-Simons current as a possible description of the gluon spin, and we also examine the problem of gauge dependence of this extended Chern-Simons current.
description: 10 pages,no figures. V2: improved presentations, references added
Clustering based classifier for the classification of benign and malignant patterns in digital mammograms
Creators: name: McLeod, P
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 460299
subject: Artificial intelligence not elsewhere classified
classificationCode: 460306
subject: Image processing

description: "Breast cancer is a leading cause of cancerous deaths and the most frequently diagnosed form of cancer in women ... The process of interpreting mammograms is a time consuming and fatiguing task where even will trained physicians have been know to misdiagnose or not idenify cancerous tumours. Accordingly the development of Computer Aided Diagnostic (CAD) systems offer large benefits in terms of reducing the mortaliity rate, reducing diagnosis time, providing a second opinion for radiologists as well as providing a tool for the training of radiologists. This thesis presents a technique, which explores the fusion of clustering and an intelligent classifier for the classification of suspicious areas within digital mammograms into benign and malignant classes ... The proposed technique has been tested on a benchmark database and the results from the experiments are discussed together with the direction of future reserach "--Abstract.
From Dirac neutrino masses to baryonic and dark matter asymmetries
Creators: name: Gu, Pei-Hong
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider an SU(3)'_c\times SU(2)'_L\times U(1)'_Y dark sector, parallel to the SU(3)_c\times SU(2)_L\times U(1)_Y ordinary sector. The hypercharges, baryon numbers and lepton numbers in the dark sector are opposite to those in the ordinary sector. We further introduce three types of messenger sectors: (i) two or more gauge-singlet Dirac fermions, (ii) two or more [SU(2)_L\times SU(2)'_L]-bidoublet Higgs scalars, (iii) at least one gauge-singlet Dirac fermion and at least one [SU(2)_L\times SU(2)'_L]-bidoublet Higgs scalar. The lepton number conserving decays of the heavy fermion singlet(s) and/or Higgs bidoublet(s) can simultaneously generate a lepton asymmetry in the [SU(2)_L]-doublet leptons and an opposite lepton asymmetry in the [SU(2)'_L]-doublet leptons to account for the cosmological baryon asymmetry and dark matter relic density, respectively. The lightest dark nucleon as the dark matter particle should have a mass about 5 GeV. By integrating out the heavy fermion singlet(s) and/or Higgs bidoublet(s), we can obtain three light Dirac neutrinos composed of the ordinary and dark neutrinos. If a mirror discrete symmetry is further imposed, our models will not require more unknown parameters than the traditional type-I, type-II or type-I+II seesaw models.
description: 15 pages, 6 figures. More discussions and references. To appear in NPB
Demokratie stabilisieren und Bürger*innen stärken – zwei Seiten derselben Medaille?
Creators: name: Hedtke, Reinhold
Publisher: name: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung.
Year: 2021

description: Der Beitrag diskutiert die politische Repräsentation und Partizipation von Kindern und Jugendlichen und den allgemeinen Zustand der politischen Bildung. Er thematisiert die Spannung zwischen sozialer und politischer Ungleichheit und dem Gleichheitsversprechen der Demokratie und begründet eine Akzentverschiebung hin zu einer interessenpolitischen Bildung für junge Menschen. Der Text unterstreicht die Kritikaufgabe der Wissenschaft, fordert ein Aufgreifen der Kritik der Leute und die Parteinahme der Fachdidaktik für Kinder und Jugendliche. Schließlich plädiert er für das Leitbild der schwierigen, unbequemen und gegenüber ungerechtfertigter Ungleichheit unnachgiebigen Bürger*innen.
description: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung., Vol. 3 No. 3 (2021): Demokratiebildung als (hoch-)schulische Querschnittsaufgabe und demokratisch-politische Bildung als Prinzip der Lehrer*innen-Bildung
Two Dimensional Polymerization of Graphene Oxide: Bottom-up Approach
Creators: name: Atanasov, Victor
name: Russev, Stoyan
name: Lyutov, Lyudmil
name: Zagranyarski, Yulian
name: Dimitrova, Iglika
name: Avdeev, Georgy
name: Avramova, Ivalina
name: Vulcheva, Evgenia
name: Kirilov, Kiril
name: Tzonev, Atanas
name: Abrashev, Miroslav
name: Tsutsumanova, Gichka
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We demonstrate a bottom-up synthesis of structures similar to graphene oxide via a two dimensional polymerization. Experimental evidence and discussion are conveyed as well as a general framework for this two dimensional polymerization. The proposed morphologies and lattice structures of these graphene oxides are derived from aldol condensation of alternating three nucleophilic and three electrophilic centers of benzenetriol.
description: to appear in "Materials Chemistry and Physics"
Studierendenperspektiven auf Schüler*innenmitbestimmung im Englischunterricht
Creators: name: Gardemann, Christine
Publisher: name: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung.
Year: 2021

description: Im Mittelpunkt dieses Artikels steht die Frage, welche genuin fachlichen Gegenstände geeignet sind, um die Querschnittsaufgabe Demokratiebildung möglichst organisch in den Englischunterricht zu integrieren. Basierend auf den Eindrücken aus der Planung, Durchführung und Evaluation eines literaturdidaktischen Master-of-Education-Seminars wurde im November 2020 eine Onlinebefragung unter Studierenden im Fach Englisch an drei deutschen Universitäten durchgeführt. Sowohl die Seminareindrücke als auch die Konzeption, Umsetzung und Auswertung der Onlinebefragung werden präsentiert. Die Ergebnisse der Befragung zeigen, welche fachdidaktische und berufsbiographische Herausforderung die Stärkung der Lerner*innenperspektive im Englischunterricht mit literarischen Texten aus der Sicht der Studierenden darstellt und was dies mit Demokratiebildung zu tun hat. Aus den Ergebnissen werden abschließend Schlussfolgerungen v.a. für die universitäre fachdidaktische Lehrer*innenbildung gezogen.
description: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung., Vol. 3 No. 3 (2021): Demokratiebildung als (hoch-)schulische Querschnittsaufgabe und demokratisch-politische Bildung als Prinzip der Lehrer*innen-Bildung
A study of the mycology of the Rockhampton municipal water supply
Creators: name: Sammon, Noel
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 310705
subject: Mycology

description: "Monthly sampling of six storage reservoirs, nine water mains, and four treatment plant sites within the Rockhampton water supply system was conducted over an 18 month period. Standard methods of microfiltration, subsequent culture on agar-based medium, and conventional microscopy were used in this part of the study. Microfungi were identified to genus level by reference to the micromorphology of their reproductive structures and spores using morphological keys....Possible sources of the fungal population were investigated..."--Abstract.
Entanglement and discord: accelerated observations of local and global modes
Creators: name: Doukas, Jason
name: Brown, Eric G.
name: Dragan, Andrzej
name: Mann, Robert
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the amount of entanglement and quantum discord extractable from a two mode squeezed state as considered from the viewpoint of two observers, Alice (inertial) and Rob (accelerated). We find that using localized modes produces qualitatively different correlation properties for large accelerations than do Unruh modes. Specifically, the entanglement undergoes a sudden death as a function of acceleration and the discord asymptotes to zero in the limit of infinite acceleration. We conclude that the previous Unruh mode analyses do not determine the acceleration dependent entanglement and discord degradation of a given quantum state.
description: 6 pages, 3 figures. Minor updates in v2
A Scalable Null Model for Directed Graphs Matching All Degree Distributions: In, Out, and Reciprocal
Creators: name: Durak, Nurcan
name: Kolda, Tamara G.
name: Pinar, Ali
name: Seshadhri, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Degree distributions are arguably the most important property of real world networks. The classic edge configuration model or Chung-Lu model can generate an undirected graph with any desired degree distribution. This serves as a good null model to compare algorithms or perform experimental studies. Furthermore, there are scalable algorithms that implement these models and they are invaluable in the study of graphs. However, networks in the real-world are often directed, and have a significant proportion of reciprocal edges. A stronger relation exists between two nodes when they each point to one another (reciprocal edge) as compared to when only one points to the other (one-way edge). Despite their importance, reciprocal edges have been disregarded by most directed graph models. We propose a null model for directed graphs inspired by the Chung-Lu model that matches the in-, out-, and reciprocal-degree distributions of the real graphs. Our algorithm is scalable and requires $O(m)$ random numbers to generate a graph with $m$ edges. We perform a series of experiments on real datasets and compare with existing graph models.
description: Camera ready version for IEEE Workshop on Network Science; fixed some typos in table
Towards affordable safer level crossings: Human factors specifications for assessing new technologies for passive crossings
Creators: name: Thomsen, William
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 400512
subject: Transport engineering

description: "This study has been a part of the Cooperative Research Centre for Rail Innovation's Project R3.111. It has investigated the issues underlying road user error from the human factors engineering perspective"--Abstract.
Long-range order and spin-liquid states of polycrystalline Tb$_{2+x}$Ti$_{2-x}$O$_{7+y}$
Creators: name: Taniguchi, T.
name: Kadowaki, H.
name: Takatsu, H.
name: Fåk, B.
name: Ollivier, J.
name: Yamazaki, T.
name: Sato, T. J.
name: Yoshizawa, H.
name: Shimura, Y.
name: Sakakibara, T.
name: Hong, T.
name: Goto, K.
name: Yaraskavitch, L. R.
name: Kycia, J. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Low-temperature states of polycrystalline samples of a frustrated pyrochlore oxide Tb$_{2+x}$Ti$_{2-x}$O$_{7+y}$ have been investigated by specific heat, magnetic susceptibility, and neutron scattering experiments. We have found that this system can be tuned by a minute change of $x$ from a spin-liquid state ($x < x_{\text{c}}$) to a partly ordered state with a small antiferromagnetic ordering of the order of $0.1 μ_{\text{B}}$. Specific heat shows a sharp peak at a phase transition at $T_{\text{c}}= 0.5$ K for $x=0.005$. Magnetic excitation spectra for this sample change from a quasielastic to a gapped type through $T_{\text{c}}$. The possibility of a Jahn-Teller transition is discussed.
description: 5 pages, 5 figures; Fig.1 replaced
Titel
Creators: name: Redaktion, Die
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: -
description: Funde und Ausgrabungen im Bezirk Trier, 1974: Funde und Ausgrabungen im Bezirk Trier : Mitteilungen des Rheinischen Landesmuseums Trier
HELM: Hierarchical Editing Language for Macromolecules
Creators: name: Vanderwall, Dana
Publisher: name: Zenodo
Year: 2022
Subjects: Webinar, FAIR, Cheminformatics, Chemical Data

description: This is a flash presentation highlighting working with HELM. It was presented at the “The IUPAC WorldFAIR Chemistry Webinar “What is a chemical? – User Perspectives on Digital Machine-Readable Depictions”. The event was held on Dec 08, 2022, 11-12:30 pm EST. The recording of the full webinar will be available soon. *WorldFAIR “Global cooperation on FAIR data policy and practice” is funded by the EC HORIZON-WIDERA-2021-ERA-01-41 Coordination and Support Action under Grant Agreement No. 101058393.
Galatische Ware in Trier
Creators: name: Binsfeld, Wolfgang
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 20 (1988): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Heavy Diquark Symmetry Constraints for Strong Decays
Creators: name: Eakins, B.
name: Roberts, W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The Heavy Diquark Symmetry (HDS) of Doubly Heavy Baryons (DHBs) provides new insights into the spectroscopy of these hadrons. We derive the consequences of this symmetry for the mass spectra and the decay widths of DHBs. We compare these symmetry constraints to results from a nonrelativistic quark model for the mass spectra and results from the $^3P_0$ model for strong decays. The quark model we implement was not constructed with these symmetries and contains interactions which explicitly break HDS. Nevertheless, these symmetries emerge. We argue that the $^3P_0$ model and any other model for strong transitions which employs a spectator assumption explicitly respects HDS. We also explore the possibility of treating the strange quark as a heavy quark and apply these ideas to $Ξ$, $Ξ_c$, and $Ξ_b$ baryons.
description: 28 pages
Managing knowledge work and work performance: An empirical study of higher education in Thailand
Creators: name: Liampreecha, Wasin
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 390303
subject: Higher education

description: "This research focused on individual behaviour, in the context of communities of practice, and the understanding knowledge management (KM) activities that influence individual, team, and organisational performance. A higher education related environment was selected to test the proposed hypotheses because of the many knowledge work settings and work performances that are available in this context"--Abstract.
The Space Motion of Leo I: Hubble Space Telescope Proper Motion and Implied Orbit
Creators: name: Sohn, Sangmo Tony
name: Besla, Gurtina
name: van der Marel, Roeland P.
name: Boylan-Kolchin, Michael
name: Majewski, Steven R.
name: Bullock, James S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first absolute proper motion measurement of Leo I, based on two epochs of HST ACS/WFC images separated by ~5 years. The average shift of Leo I stars with respect to ~100 background galaxies implies a proper motion of (mu_W, mu_N) = (0.1140 +/- 0.0295, -0.1256 +/- 0.0293) mas/yr. The implied Galactocentric velocity vector, corrected for the reflex motion of the Sun, has radial and tangential components V_rad = 167.9 +/- 2.8 km/s and V_tan = 101.0 +/- 34.4 km/s, respectively. We study the detailed orbital history of Leo I by solving its equations of motion backward in time for a range of plausible mass models for the Milky Way and its surrounding galaxies. Leo I entered the Milky Way virial radius 2.33 +/- 0.21 Gyr ago, most likely on its first infall. It had a pericentric approach 1.05 +/- 0.09 Gyr ago at a Galactocentric distance of 91 +/- 36 kpc. We associate these time scales with characteristic time scales in Leo I's star formation history, which shows an enhanced star formation activity ~2 Gyr ago and quenching ~1 Gyr ago. There is no indication from our calculations that other galaxies have significantly influenced Leo I's orbit, although there is a small probability that it may have interacted with either Ursa Minor or Leo II within the last ~1 Gyr. For most plausible Milky Way masses, the observed velocity implies that Leo I is bound to the Milky Way. However, it may not be appropriate to include it in models of the Milky Way satellite population that assume dynamical equilibrium, given its recent infall. Solution of the complete (non-radial) timing equations for the Leo I orbit implies a Milky Way mass M_MW,vir = 3.15 (-1.36, +1.58) x 10^12 Msun, with the large uncertainty dominated by cosmic scatter. In a companion paper, we compare the new observations to the properties of Leo I subhalo analogs extracted from cosmological simulations.
description: 21 pages, 14 figures, 4 tables; Accepted for publication in the Astrophysical Journal
Personalia
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 13 Nr. 6 (1960): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
A Binary Progenitor for the Type IIb Supernova 2011dh in M51
Creators: name: Benvenuto, Omar G.
name: Bersten, Melina C.
name: Nomoto, Ken'ichi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We perform binary stellar evolutionary calculations following the simultaneous evolution of both stars in the system to study a potential progenitor system for the Type IIb supernova 2011dh. Pre-explosion photometry as well as light-curve modeling have provided constraints on the physical properties of the progenitor system. Here we present a close binary system that is compatible with such constraints. The system is formed by stars of solar composition with 16 Msun + 10 Msun on a circular orbit with an initial period of 125 days. The primary star ends its evolution as a yellow supergiant with a mass of ~4 Msun, a final hydrogen content of ~3-5E-03 Msun and with an effective temperature and luminosity in agreement with the HST pre-explosion observations of SN 2011dh. These results are nearly insensitive to the adopted accretion efficiency factor beta. At the time of explosion, the companion star has an effective temperature of 22 to 40 thousand Kelvin, depending on the value of beta, and lies near the zero age main sequence. Considering the uncertainties in the HST pre-SN photometry the secondary star is only marginally detectable in the bluest observed band. Close binary systems, as opposed to single stars, provide a natural frame to explain the properties of SN 2011dh.
description: 12 pages, 15 figures, 3 tables. Accepted for publication in The Astrophysical Journal on October June 27, 2012
Surface states and local spin susceptibility in doped three-dimensional topological insulators with odd-parity superconducting pairing symmetry
Creators: name: Zocher, Björn
name: Rosenow, Bernd
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate characteristic features in the spin response of doped three-dimensional topological insulators with odd-parity unequal-spin superconducting pairing, which are predicted to have gapless Majorana surface modes. These Majorana modes contribute to the local spin susceptibility, giving rise to a characteristic temperature behavior of the Knight shift and the spin-lattice relaxation time in magnetic resonance experiments. Because of their different decay lengths, the Majorana modes can be observed and clearly distinguished from the Dirac modes of the topological insulator by local probes which allow for a depth-controlled study of the electron spins on the nanometer length scale.
description: 12 pages, 11 figures
The noncommutative Poisson bracket and the deformation of the family algebras
Creators: name: Wei, Zhaoting
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 22E46, 17B63, 53D55, 16E40

description: A.A. Kirillov introduced the family algebras in 2000. In this paper we study the noncommutative Poisson bracket P on the classical family algebra. We show that P is the first-order deformation from the classical family algebra to the quantum family algebra. We will prove that the noncommutative Poisson bracket is in fact a Hochschild 2-coboundary therefore the deformation is infinitesimally trivial. In the last part of this paper we also talk about Mackey's analogue and the quantization problem of the family algebras.
description: 19 pages, minor changes of the previous version
Hexagonally Warped Dirac Cones and Topological Phase Transition in Silicene Superstructure
Creators: name: Ezawa, Motohiko
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Silicene is a monolayer of silicon atoms forming a two-dimensional honeycomb lattice. We investigate the topological properties of a silicene superstructure generated by an external periodic potential. The superstructure is a quantum spin-Hall (QSH) insulator if it is topologically connected to silicene. It is remarkable that two inequivalent K and K' points in the silicene Brillouin zone are identified in certain superstructures. In such a case two Dirac cones coexist at the same Dirac point in the momentum space and they are hexagonally warped by the Coulomb interaction. We carry out a numerical analysis by taking an instance of the ($3\times 3$) superstructure on the ($4\times 4$) structure of the Ag substrate. We show that it is a QSH insulator, that there exists no topological phase transition by external electric field, and that the hexagonally warping occurs in the band structure.
description: 7 pages, 10 figures (to be published in Eur.Phys.J.B)
SU(N) gauge theories at large N
Creators: name: Lucini, Biagio
name: Panero, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review the theoretical developments and conceptual advances that stemmed from the generalization of QCD to the limit of a large number of color charges, originally proposed by 't Hooft. Then, after introducing the gauge-invariant non-perturbative formulation of non-Abelian gauge theories on a spacetime lattice, we present a selection of results from recent lattice studies of theories with a different number of colors, and the findings obtained from their extrapolation to the 't Hooft limit. We conclude with a brief discussion and a summary.
description: 2+97 pages, 29 pdf figures; prepared for submission to Physics Reports. V2: 3+104 pages, 30 figures: references added, discussion expanded, typos corrected: version submitted to and published in Physics Reports
Symbolic blender-horseshoes and applications
Creators: name: Barrientos, Pablo G.
name: Ki, Yuri
name: Raibekas, Artem
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We study partially-hyperbolic skew-product maps over the Bernoulli shift with Hölder dependence on the base points. In the case of contracting fiber maps, symbolic blender-horseshoe is defined as an invariant set which meets any almost horizontal disk in a robust sense. These invariant sets are understood as blenders with center stable bundle of any dimension. We then give necessary conditions (covering property) on an iterated function system such that the relevant skew-product has a symbolic blender-horseshoe. We use this local plug to yield robustly non-hyperbolic transitive diffeomorphisms and robust heterodimensional cycles of co-index equal to the dimension of the central direction.
Work-life conflict in the university setting: The contribution of strain and hours of work
Creators: name: Samad, Ataus
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 350503
subject: Human resources management

description: "The study of work-life conflict has been examined by a number of disciplines with each bringing their respective methodological modes of inquiry to the problem. This has resulted in a literature base that includes empirical and non-empirical studies. The results from these studies are often inconsistent given that many have employed data collection tools that have not been subjected to psychometric testing or validation. One solution is to impose greater rigour in the study of work-life conflict by employing models from the occupational stress literature. These models contain a clear framework and a dedicated set of measurement tools. There are many parallels between the two literatures given they are both concerned with 'demands' on the individual and their 'resources' to cope with that demand. The demand-control-support (DCS) was selected as a vehicle to investigate work-life conflict. This model, however, was modified to include the direct effect of total working hours"--Abstract. The population for this study included all employees at the five regional Queensland campuses of CQUniversity Australia.
Die germanische Siedlung und der Rennofen von Salzgitter-Lobmachtersen
Creators: name: Stelzer, Gudrun
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 29 (1960): Nachrichten aus Niedersachsens Urgeschichte
Collectively Enhanced Interactions in Solid-state Spin Qubits
Creators: name: Weimer, Hendrik
name: Yao, Norman Y.
name: Lukin, Mikhail D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose and analyze a technique to collectively enhance interactions between solid-state quantum registers composed from random networks of spin qubits. In such systems, disordered dipolar interactions generically result in localization. Here, we demonstrate the emergence of a single collective delocalized eigenmode as one turns on a transverse magnetic field. The interaction strength between this symmetric collective mode and a remote spin qubit is enhanced by square root of the number of spins participating in the delocalized mode. Mediated by such collective enhancement, long-range quantum logic between remote spin registers can occur at distances consistent with optical addressing. A specific implementation utilizing Nitrogen-Vacancy defects in diamond is discussed and the effects of decoherence are considered.
description: 5 pages, 4 figures
Behn, Friedrich: Stadtkernforschung in Leipzig
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Behn, Friedrich: Stadtkernforschung in Leipzig. Die Ausgrabung auf dem Matthäikirchhofe Teil 1. Leipzig (Johann Ambrosius Barth) 1960. 130 Seiten mit 40 Abb. im Text, 18 Bildtaf. u. 2 Karten. Brosch.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 29 (1960): Nachrichten aus Niedersachsens Urgeschichte
Gomille, Gunter (2019). Der Stellenwert der Wissenschaftlichen Weiterbildung an der Hochschule. Eine kritische Untersuchung über Möglichkeiten der Differenzierung der Wissenschaftlichen Weiterbildung innerhalb der Hochschule. Hamburg: Verlag Dr. Kovac.
Creators: name: Gornik, Elke A.
Publisher: name: Zeitschrift Hochschule und Weiterbildung (ZHWB)
Year: 2020

description: Zeitschrift Hochschule und Weiterbildung (ZHWB), 2020/1: Geschichte der wissenschaftlichen Weiterbildung
Double real radiation corrections to $t\bar{t}$ production at the LHC: the $gg\rightarrow t\bar{t}q\bar{q}$ channel
Creators: name: Abelof, Gabriel
name: Ridder, Aude Gehrmann-De
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the double real radiation contributions to the $t \bar t$ hadronic production cross section stemming from the partonic process $gg\rightarrow t\bar{t}q\bar{q}$. We explicitly construct the antenna subtraction terms for this gluon-gluon initiated process starting from the double soft behaviour of the double real radiation matrix elements using soft currents. Those subtraction terms, given in leading and subleading colour contributions, require the use of new genuine NNLO four-parton antenna functions involving massive fermions. Those are also presented together with their infrared limits in this paper. We checked the validity of our subtraction terms numerically by showing that the ratio between the real radiation matrix elements and the subtraction terms approaches unity in all single and double unresolved regions of phase space.
description: 44 pages, 5 figures. Changes to the text of the original version. Version to appear in JHEP
A Parameter-Space Study of Carbon-Oxygen White Dwarf Mergers
Creators: name: Zhu, Chenchong
name: Chang, Philip
name: van Kerkwijk, Marten
name: Wadsley, James
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The merger of two carbon-oxygen white dwarfs can lead either to a spectacular transient, stable nuclear burning or a massive, rapidly rotating white dwarf. Simulations of mergers have shown that the outcome strongly depends on whether the white dwarfs are similar or dissimilar in mass. In the similar-mass case, both white dwarfs merge fully and the remnant is hot throughout, while in the dissimilar case, the more massive, denser white dwarf remains cold and essentially intact, with the disrupted lower mass one wrapped around it in a hot envelope and disk. In order to determine what constitutes "similar in mass" and more generally how the properties of the merger remnant depend on the input masses, we simulated unsynchronized carbon-oxygen white dwarf mergers for a large range of masses using smoothed-particle hydrodynamics. We find that the structure of the merger remnant varies smoothly as a function of the ratio of the central densities of the two white dwarfs. A density ratio of 0.6 approximately separates similar and dissimilar mass mergers. Confirming previous work, we find that the temperatures of most merger remnants are not high enough to immediately ignite carbon fusion. During subsequent viscous evolution, however, the interior will likely be compressed and heated as the disk accretes and the remnant spins down. We find from simple estimates that this evolution can lead to ignition for many remnants. For similar-mass mergers, this would likely occur under sufficiently degenerate conditions that a thermonuclear runaway would ensue.
description: 33 pages, 18 figures, one seven-page table, published in ApJ 8 April 2013
Bericht der Abteilung für ur- und frühgeschichtliche Bodendenkmalpflege am Niedersächsischen Landesmuseum Hannover
Creators: name: Claus, Martin
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 31 (1962): Nachrichten aus Niedersachsens Urgeschichte
A framework for academic staff online course development
Creators: name: Fleming, Julie
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: "This research is concerned with the development of a framework that can be used to guide online course development for academic staff. The research has been framed using existing literature, and explores the factors influencing the approaches academic staff use when developing an online course. It also explores the appropriate strategies universities can use to maximise academic staff use of the online learning environment. In this respect, the research adopted a mixed methods research design"--Abstract.