cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Functional Workspace for One-Handed Tap and Swipe Microgestures
Creators: name: Dewitz, Bastian
name: Steinicke, Frank
name: Geiger, Christian
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Single-Hand Microgestures
subject: Thumb-to-Finger Interaction
subject: User study
subject: Functional Workspace

description: Single-hand microgestures are a promising interaction concept for ubiquitous and mobile interaction. Due to the technical difficulty of accurately tracking small movements of fingers that are exploited in this type of interface, most research in this field is currently aimed at providing a good foundation for the future application in the real word. One interaction concept of microgestures is one-handed tap and swipe interaction that resembles one-handed interaction with handheld devices like smartphones. In this paper, we present a small study that explores the possible functional workspace of one-handed interaction which describes the area on the palmar surface where tap- and swipe-interaction is possible. Additionally to thumb-to-finger interaction which has been investigated more often, we also considered other fingers. The results show, that thumb interaction with index, ring and middle finger is the most appropriate form of input but other input combinations are under circumstances worth consideration. However, there is a high deviation on which locations can be reached depending on the individual hand anatomy.
Conformation of a Polyelectrolyte Complexed to a Like-Charged Colloid
Creators: name: Messina, Rene
name: Holm, Christian
name: Kremer, Kurt
Publisher: name: arXiv
Year: 2001
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report results from a molecular dynamics (MD) simulation on the conformations of a long flexible polyelectrolyte complexed to a charged sphere, \textit{both negatively charged}, in the presence of neutralizing counterions in the strong Coulomb coupling regime. The structure of this complex is very sensitive to the charge density of the polyelectrolyte. For a fully charged polyelectrolyte the polymer forms a dense two-dimensional "disk", whereas for a partially charged polyelectrolyte the monomers are spread over the colloidal surface. A mechanism involving the \textit{overcharging} of the polyelectrolyte by counterions is proposed to explain the observed conformations.
description: 4 pages, 4 figures (6 EPS files)
Bactrocera (Bactrocera) prolixa : Drew 1989
Creators: name: Drew, R. A. I.
name: Ma, Jing
name: Smith, S.
name: Hughes, J. M.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tephritidae
Bactrocera
Bactrocera prolixa

description: Bactrocera (Bactrocera) prolixa Drew
 Bactrocera (Bactrocera) prolixa: Drew, 1989: 93–94.
  Diagnosis. –  A medium sized species (wing length 6.8 mm); face with a pair of medium sized pear shaped spots; scutum black; postpronotal lobe and notopleuron yellow; each lateral postsutural vitta of medium width and narrowing slightly posteriorly to end before ia. seta; mesopleural stripe reaching midway between anterior margin of notopleuron and postpronotal lobe dorsally; wings with cells bc and c colourless, microtrichia in outer 1 / 3 of cell c only, fuscous costal band almost confluent with R 4+5 but of paler diffuse colouration between R 2+3 and R, broad fuscous cubital streak; legs with all segments fulvous; abdomen elongate oval and with terga II–V orange-brown except for pale fuscous margins laterally on tergum V and a narrow medial longitudinal pale fuscous band on anterior 2 / 3 of this tergum, shining spots orange-brown.
 4+5
  Attractant. –  Methyl eugenol.
  Hosts. –  No known record.
  Distribution. –  Type locality: Papua New Guinea (Nomad, Western District).
description: Published as part of Drew, R. A. I., Ma, Jing, Smith, S. & Hughes, J. M., 2011, The Taxonomy And Phylogenetic Relationships Of Species In The Bactrocera Musae Complex Of Fruit Flies (Diptera: Tephritidae: Dacinae) In Papua New Guinea, pp. 145-162 in Raffles Bulletin of Zoology 59 (2) on page 153, DOI: 10.5281/zenodo.10107060
The impact of innovation and innovation subsidies on economic development in German regions
Creators: name: Cantner, Uwe
name: Dettmann, Eva
name: Giebler, Alexander
name: Guenther, Jutta
name: Kristalova, Maria
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Public innovation subsidies in a regional environment are expected to unfold a positive economic impact over time. The focus of this paper is on an assessment of the long-run impact of innovation and innovation subsidies in German regions. This is scrutinized by an estimation approach combining panel model and time-series characteristics and using regional data for the years 1980–2014. The results show that innovation and innovation subsidies in the long run have a positive impact on the economic development of regions in Germany. This supports a long-term strategy for regional and innovation policy.
title: Investigating Car Futures from Different Angles
Creators: name: Stevens, Gunnar
name: Meurer, Johanna
name: Pakusch, Christina
name: Bossauer, Paul
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Autonomous Driving
subject: Methods
subject: Research through Design
subject: Wizard of Oz
subject: Driving Simulator
subject: Survey
subject: Interview
subject: Observation

description: The design of self-driving cars is one of the most exciting and ambitious challenges of our days and every day, new research work is published. In order to give an orientation, this article will present an overview of various methods used to study the human side of autonomous driving. Simplifying roughly, you can distinguish between design science-oriented methods (such as Research through Design, Wizard of Oz or driving simulator ) and behavioral science methods (such as survey, interview, and observation). We show how these methods are adopted in the context of autonomous driving research and dis-cuss their strengths and weaknesses. Due to the complexity of the topic, we will show that mixed method approaches will be suitable to explore the impact of autonomous driving on different levels: the individual, the social interaction and society.
title: Spherical Objects as an Opportunity to Investigate Physical Embodiment in Mixed Reality Environments
Creators: name: Englmeier, David
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Tangible Interaction
subject: Spherical Objects
subject: Virtual Reality
subject: Spherical Displays

description: In this work, we introduce our approach of using current VR and AR technology to explore fully tangible spherical user interfaces.We present three prototypes utilizing this technique. We briefly outline possible challenges, advantages, and fields of application for the presented concepts. Accordingly, we discuss why VR is an interesting tool to investigate interaction with Tangible User Interfaces (TUIs) that are currently not feasible in real world applications such as tangible holographic interfaces or lightweight handheld non-planar displays.This allows for studying various levels of tangible feedback on established use cases such as spherical visualizations. Subsequently, a tangible sphere, due to its natural shape enables an investigation of interaction techniques transferred from the real to the virtual world. Building on these prospects we represent the position that such objects could play a leading role not only in research but in future Virtual Reality (VR) and Augmented Reality (AR) applications that rely on natural interaction based on realistic physical feedback.
Generalized Hamiltonian Dynamics of Friedmann Cosmology with Scalar and Spinor Matter Source Fields
Creators: name: Khvedelidze, A. M.
name: Palii, Yu. G.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The classical and quantum dynamics of the Friedmann-Robertson-Walker Universe with massless scalar and massive fermion matter field as a source is discussed in the framework of the Dirac generalized Hamiltonian formalism. The Hamiltonian reduction of this constrained system is realized for two cases of minimal and conformal coupling between gravity and matter. It is shown that in both cases for all values of curvature, of maximally symmetric space there exists a time independent reduced local Hamiltonian which describes the dynamics of the cosmic scale factor. The relevance of conformal time-like Killing vector fields in FRW space-time to the existence of time independent Hamiltonian and the corresponding notion of conserved energy is discussed. The extended quantization with the Wheeler-deWitt equation is compared with the canonical quantization of unconstrained system. It is shown that quantum observables treated as expectation values of the Dirac observables properly describe the original classical theory.
description: 18 pages, LaTex, no figures, to appear in Classical and Quantum Gravity
Thinging for Computational Thinking
Creators: name: Al-Fedaghi, Sabah
name: Alkhaldi, Ali Abdullah
Publisher: name: arXiv
Year: 2019
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This paper examines conceptual models and their application to computational thinking. Computational thinking is a fundamental skill for everybody, not just for computer scientists. It has been promoted as skills that are as fundamental for all as numeracy and literacy. According to authorities in the field, the best way to characterize computational thinking is the way in which computer scientists think and the manner in which they reason how computer scientists think for the rest of us. Core concepts in computational thinking include such notions as algorithmic thinking, abstraction, decomposition, and generalization. This raises several issues and challenges that still need to be addressed, including the fundamental characteristics of computational thinking and its relationship with modeling patterns (e.g., object-oriented) that lead to programming/coding. Thinking pattern refers to recurring templates used by designers in thinking. In this paper, we propose a representation of thinking activity by adopting a thinking pattern called thinging that utilizes a diagrammatic technique called thinging machine (TM). We claim that thinging is a valuable process as a fundamental skill for everybody in computational thinking. The viability of such a proclamation is illustrated through examples and a case study.
description: 10 pages, 18 figures
Second-quantized Landau-Zener theory for dynamical instabilities
Creators: name: Anglin, J. R.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: State engineering in nonlinear quantum dynamics sometimes may demand driving the system through a sequence of dynamically unstable intermediate states. This very general scenario is especially relevant to dilute Bose-Einstein condensates, for which ambitious control schemes have been based on the powerful Gross-Pitaevskii mean field theory. Since this theory breaks down on logarithmically short time scales in the presence of dynamical instabilities, an interval of instabilities introduces quantum corrections, which may possibly derail a control scheme. To provide a widely applicable theory for such quantum corrections, this paper solves a general problem of time-dependent quantum mechanical dynamical instability, by modelling it as a second-quantized analogue of a Landau-Zener avoided crossing: a `twisted crossing'.
description: 4 pages, 3 figures
Rough volatility of Bitcoin
Creators: name: Takaishi, Tetsuya
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: Recent studies have found that the log-volatility of asset returns exhibit roughness. This study investigates roughness or the anti-persistence of Bitcoin volatility. Using the multifractal detrended fluctuation analysis, we obtain the generalized Hurst exponent of the log-volatility increments and find that the generalized Hurst exponent is less than $1/2$, which indicates log-volatility increments that are rough. Furthermore, we find that the generalized Hurst exponent is not constant. This observation indicates that the log-volatility has multifractal property. Using shuffled time series of the log-volatility increments, we infer that the source of multifractality partly comes from the distributional property.
description: 12 pages, 8 figures
title: Konzeption und Erprobung eines Webcrawlers zur Erstellung hierarchischer Indizes
Creators: name: Haimerl, Mathias
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Webcrawler
subject: Barrierefreiheit
subject: Ordiphrase

description: Das Durchsuchen von Webseiten, wie es u.A. von modernen Topical Crawlers betrieben wird, ist technisch äußerst aufwändig, da der Fokus auf Extraktion und Korrelation sämtlicher Informationen einer Webseite liegt. Für die Markierung und computergestützte Erklärung komplexer Ausdrücke in Texten müssen diese zuvor identifiziert und indiziert werden. Um eine Webseite auf Basis eines bestehenden Grundindex zu durchsuchen und einen für die Einzelseite spezifischen Subindex zu erstellen, muss ein alternatives Konzept des Crawlings verfolgt werden, um dieses Verfahren effizient und zielgerichtet nutzen zu können. Anschließend wird die Implementierung des Crawlers skizziert und Testläufe an verschiedenartigen Webseiten getestet. Abschließend wird das erstellte Programm im Vergleich zu Topical Crawlers und der potentiellen Einsetzbarkeit im angedachten Einsatzzweck betrachtet.
Bactrocera (Bactrocera) robertsi Drew
Creators: name: Drew, R. A. I.
name: Ma, Jing
name: Smith, S.
name: Hughes, J. M.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tephritidae
Bactrocera
Bactrocera robertsi

description: Bactrocera (Bactrocera) robertsi Drew
 Bactrocera (Bactrocera) robertsi: Drew, 1989: 42–43.
  Diagnosis. –  A medium sized species (wing length 7.0 mm); face with dark facial spots either absent or very small and pale; scutum black; postpronotal lobe yellow; notopleuron with anterior 1 / 3 to 1 / 2 black and remainder yellow; each lateral postsutural vitta broad and narrowing slightly posteriorly to end before ia. seta; mesopleural stripe reaching midway between anterior margin of notopleuron and postpronotal lobe dorsally; wings with cell bc pale fulvous and cell c fulvous, microtrichia in outer corner of cell c only, fuscous costal band confluent with R 2+3 and of uniform colouration, broad fuscous cubital streak; legs fulvous except hind tibiae fuscous; terga III–V red-brown with a narrow transverse fuscous to dark fuscous band across anterior margin of tergum III and fuscous on lateral margins of all three terga and a narrow medial longitudinal fuscous to black band over all three terga, shining spots red-brown.
  Attractant. –  Cue lure.
  Hosts. –  No known record.
  Distribution. –  Type locality: Papua New Guinea (Wau, Morobe Provice).
Previously recorded: Papua New Guinea (Central, Morobe and Western Highlands Provinces).
description: Published as part of Drew, R. A. I., Ma, Jing, Smith, S. & Hughes, J. M., 2011, The Taxonomy And Phylogenetic Relationships Of Species In The Bactrocera Musae Complex Of Fruit Flies (Diptera: Tephritidae: Dacinae) In Papua New Guinea, pp. 145-162 in Raffles Bulletin of Zoology 59 (2) on page 154, DOI: 10.5281/zenodo.10107060
Connecting Asia-Pacific Hip-hop – The Role of the Cross-Cultural Intermediary
Creators: name: JASON ANDREW NG
Publisher: name: Monash University
Year: 2019
Subjects: subject: 150304 Entrepreneurship
subject: FOS: Economics and business
subject: 190403 Dance
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 190409 Musicology and Ethnomusicology
subject: 190499 Performing Arts and Creative Writing not elsewhere classified
subject: 209999 Language, Communication and Culture not elsewhere classified
subject: FOS: Languages and literature
subject: 80606 Global Information Systems
subject: FOS: Computer and information sciences

description: This thesis examines a network of subcultural figures who have been important in developing an Asia-Pacific Hip hop culture. These individuals, conceptualised as ‘cross cultural intermediaries’, are highly mobile and internationally connected, forging links between different sites within the region. The phenomenon has been researched using an ethnographic approach across a four-year period in five Asia-Pacific cities. The research presents the cross-cultural intermediary as a new subcultural actor who takes advantage of cosmopolitan competencies, online media, entrepreneurial business strategies and regional mobility to develop distinctive forms of Hip-hop, at the same time connecting them to a larger Asia-Pacific network
title: Augmenting Everyday Objects -- A Reflection on Reuse as an Interface Design Method
Creators: name: Rossmy, Beat
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: TUI
subject: Embodied Interaction
subject: Every Day Objects

description: This paper presents three projects which are based on the reuse of existing objects as new Tangible User Interfaces for the purpose of (a) education, (b) exploration and (c) creative expression. The already existing familiarity of the users with the basic interaction concepts of such systems can help to (a) breakdown barriers and increase accessibility of technologies as well as (b) can create playful and enjoyable experiences. The authors give a short overview over their conducted work and the resulting insights as well as a reflection about the process in retrospective.
Gravitational Wave Emission by Cataclysmic Variables: numerical models of semi-detached binaries
Creators: name: Rezzolla, Luciano
name: Uryu, Koji
name: Yoshida, Shin'ichirou
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gravitational wave emission is considered to be the driving force for the evolution of short-period cataclysmic binary stars, making them a potential test for the validity of General Relativity. In spite of continuous refinements of the physical description, a 10% mismatch exists between the theoretical minimum period ($P_{\rm turn} \simeq 70$ min) and the short-period cut-off ($P_{\rm min} \simeq 80$ min) observed in the period distribution for cataclysmic variable binaries. A possible explanation for this mismatch was associated with the use of the Roche model. We here present a systematic comparison between self-consistent, numerically constructed sequences of hydrostatic models of binary stars and Roche models of semi-detached binaries. On the basis of our approach, we also derive a value for the minimum period of cataclysmic variable binaries. The results obtained through the comparison indicate that the Roche model is indeed very good, with deviations from the numerical solution which are of a few percent at most. Our results therefore suggest that additional sources of angular momentum loss or alternative explanations need to be considered in order to justify the mismatch.
description: 7pages, 4figures. To appear in MNRAS
title: Sketching with Hardware: A course for teaching Interactive Hardware Prototyping to Computer Science Students
Creators: name: Schmid, Andreas
name: Wimmer, Raphael
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: tangible interaction
subject: teaching
subject: prototyping

description: Sketching with Hardware is an undergraduate university course with the goal to teach students how to build prototypes for tangible user interfaces. Goals of this course are to create awareness for tangible interaction among students and prepare them to realize advanced projects like bachelor’s and master’s theses in this field. In this paper, authors share their experience teaching the concepts of tangible interaction, electronics and prototyping to computer science students in a two week course. The course’s content, structure and goals are explained, and needed material and infrastructure are described. The long-term effect of the course has been evaluated by conducting a survey among former participants.
Existence of ideal magnetofluid equilibria without continuous Euclidean symmetries
Creators: name: Sato, Naoki
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the existence of steady solutions of ideal magnetofluid systems (ideal MHD and ideal Euler equations) without continuous Euclidean symmetries. It is shown that all nontrivial magnetofluidostatic solutions are locally symmetric, although the symmetry is not necessarily an Euclidean isometry. Furthermore, magnetofluidostatic equations admit both force-free (Beltrami type) and non-force-free (with finite pressure gradients) solutions that do not exhibit invariance under translations, rotations, or their combination. Examples of smooth solutions without continuous Euclidean symmetries in bounded domains are given. Finally, the existence of square integrable solutions of the tangential boundary value problem without continuous Euclidean symmetries is proved.
Domain Agnostic Learning with Disentangled Representations
Creators: name: Peng, Xingchao
name: Huang, Zijun
name: Sun, Ximeng
name: Saenko, Kate
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Unsupervised model transfer has the potential to greatly improve the generalizability of deep models to novel domains. Yet the current literature assumes that the separation of target data into distinct domains is known as a priori. In this paper, we propose the task of Domain-Agnostic Learning (DAL): How to transfer knowledge from a labeled source domain to unlabeled data from arbitrary target domains? To tackle this problem, we devise a novel Deep Adversarial Disentangled Autoencoder (DADA) capable of disentangling domain-specific features from class identity. We demonstrate experimentally that when the target domain labels are unknown, DADA leads to state-of-the-art performance on several image classification datasets.
title: Erhöhung der Motivation für Open Access durch Gamification
Creators: name: Bräuer, Paula
name: Mazarakis, Athanasios
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Gamification
subject: Open Access
subject: Motivation
subject: Abzeichen
subject: Fortschrittsanzeige

description: Obwohl den meisten Wissenschaftler/innen bekannt ist, dass es neben dem traditionellen und abonnementbasierten Publikationsmodell, auch die Möglichkeit existiert, ihre Forschung Open Access zu publizieren und Wissenschaftler/innen dieses neue Modell laut verschiedenen Umfragen überwiegend befürworten, findet die Transformation zu Open Access bisher nur sehr langsam statt. Um diesen Vorgang zu beschleunigen, wird nach neuen Möglichkeiten gesucht, um Anreize für Forschende zu schaffen sich mit der Thematik Open Access zu befassen und die Prinzipien auch in der Praxis umzusetzen. Ein solches Konzept zum Schaffen von Anreizen, welches sich bereits in unterschiedlichsten Kontexten bewährt hat, ist Gamification. In einer Studie mit 28 Teilnehmenden wurde die Wirkung der Spielelemente Abzeichen und Fortschrittsanzeige auf die Motivation beim Bearbeiten eines Online-Quiz zum Thema Open Access untersucht. Beide Spielelemente lieferten einen statistisch signifikanten Anstieg bei der Anzahl an bearbeiteten Fragen in Vergleich zu einer Kontrollgruppe. Dieses Ergebnis lässt darauf schließen, dass Gamification ein hilfreiches Instrument ist, um Wissenschaftler/innen für das Thema Open Access zu motivieren.
Density distribution function of a self-gravitating isothermal compressible turbulent fluid in the context of Molecular Clouds ensembles II: the contribution of the turbulent term and the potential of the outer shells
Creators: name: Donkov, Sava
name: Stefanov, Ivan Zh.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this paper we continue to investigate the energy conservation equation obtained in our previous work. We set ourselves three new goals. The first one is to rewrite the main equations in terms of density profile in order to give more physical insight. The second one is to investigate the significance of two new terms in the energy conservation equation. They originate from the gravity of the outer shells of cloud and the masses outer to the cloud, respectively. The third goal is to investigate the main equation in the case when the kinetic turbulent term scales according to Larson's law and it is independent, formally, of the accretion, in contrast to the previous work. The combination of supersonic turbulence and spherical symmetry raises a caveat which is commented in our conclusions. We obtained two solutions for the density profile. They scale with slopes -2 and -3/2, respectively. The energy balance for the second solution is the same as in the previous paper: this is a free-fall. For the first solution there are two cases. The first one: if the turbulent term does not scale, then it could be important for the energy balance of the cloud. The second one: if the turbulent term does scale, then it is not important for the energy balance of the cloud. The two new gravitational terms don't affect the existence of the two solutions, but the gravitation of the outer masses calibrate the energy balance for the first solution.
description: accepted for publication in MNRAS
On the Conventionality of Simultaneity
Creators: name: Minguzzi, E.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Starting from the experimental fact that light propagates over a closed path at speed c (L/c law), we show to what extent the isotropy of the speed of light can be considered a matter of convention. We prove the consistence of anisotropic and inhomogenous conventions, limiting the allowed possibilities. All conventions lead to the same physical theory even if its formulation can change in form. The mathematics involved is that of gauge theories and the choice of a simultaneity convention is interpreted as a choice of the gauge. Moreover we prove that a Euclidean space where the L/c law holds, gives rise to a spacetime with Minkowskian causal structure, and we exploit the consequences for the causal approach to the conventionality of simultaneity.
description: 17 pages, 3 figures, LaTeX. v3: Final version, accepted for publication in the April issue of Found. Phys. Lett
Chiral light-matter interactions using spin-valley states in transition metal dichalcogenides
Creators: name: Yang, Zhili
name: Aghaeimeibodi, Shahriar
name: Waks, Edo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Chiral light-matter interactions can enable polarization to control the direction of light emission in a photonic device. Most realizations of chiral light-matter interactions require external magnetic fields to break time-reversal symmetry of the emitter. One way to eliminate this requirement is to utilize strong spin-orbit coupling present in transition metal dichalcogenides that exhibit a valley dependent polarized emission. Such interactions were previously reported using plasmonic waveguides, but these structures exhibit short propagation lengths due to loss. Chiral dielectric structures exhibit much lower loss levels and could therefore solve this problem. We demonstrate chiral light-matter interactions using spin-valley states of transition metal dichalcogenide monolayers coupled to a dielectric waveguide. We use a photonic crystal glide plane waveguide that exhibits chiral modes with high field intensity, coupled to monolayer WSe2. We show that the circularly polarized emission of the monolayer preferentially couples to one direction of the waveguide, with a directionality as high as 0.35, limited by the polarization purity of the bare monolayer emission. This system enables on-chip directional control of light and could provide new ways to control spin and valley degrees of freedom in a scalable photonic platform.
Inclusion-exclusion and Segre classes
Creators: name: Aluffi, Paolo
Publisher: name: arXiv
Year: 2002
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14C17, 14J17, 57R20

description: We propose a variation of the notion of Segre class, by forcing a naive `inclusion-exclusion' principle to hold. The resulting class is computationally tractable, and is closely related to Chern-Schwartz-MacPherson classes. We deduce several general properties of the new class from this relation, and obtain an expression for the Milnor class of a scheme in terms of this class.
description: 8 pages
The supersoft X-ray transient ASASSN-16oh as a thermonuclear runaway without mass ejection
Creators: name: Hillman, Yael
name: Orio, Marina
name: Prialnik, Dina
name: Shara, Michael
name: Bezak, Pavol
name: Dobrotka, Andrej
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The supersoft X-ray and optical transient ASASSN-16oh has been interpreted by Maccarone et al. (2019) as having being induced by an accretion event on a massive white dwarf, resembling a dwarf nova super-outburst. These authors argued that the supersoft X-ray spectrum had a different origin than in an atmosphere heated by shell nuclear burning, because no mass was ejected. We find instead that the event's timescale and other characteristics are typical of non-mass ejecting thermonuclear runaways, as already predicted by Shara et al. (1977) and the extensive grid of nova models by Yaron et al. (2005). We suggest that the low X-ray and bolometric luminosity in comparison to the predictions of the models of nuclear burning are due to an optically thick accretion disk, hiding most of the white dwarf surface. If this is the case, we calculated that the optical transient can be explained as a non-ejective thermonuclear event on a WD of $\simeq$1.1M$_\odot$ accreting at the rate of $\simeq3.5{-}5{\times}10^{-7}$M$_\odot$yr$^{-1}$. We make predictions that should prove whether the nature of the transient event was due to thermonuclear burning or to accretion; observational proof should be obtained in the next few years, because a new outburst should occur within $\simeq$10-15 years of the event.
description: 7 pages, 2 figures
From Ruskin to Aalto; Prophets with a Message?
Creators: name: Robertson, Christopher James
Publisher: name: The Australian National University
Year: 2017
Subjects: Ruskin
Aalto
Epistemology
Design

description: This thesis and its associated works critically explore the shift in philosophical views on nature from 'created' to 'machine' and their use as analogies for design and architecture from the mid 19th century to the early 20th century. I trace both a penetrating description of a 'created' cosmology for architecture and design expounded by John Ruskin at the very point of point of its decline with the rise of scientific materialism/reductionism as a replacement cosmology that gains traction following Darwin's theory of evolution. The thesis looks at the intermediate tension between the two cosmologies outworked by architects and designers of the period as they engage/disengage the shift with a focus on the early modernist Finnish architect Alvar Aalto to show what we might learn for the present. The theoretical/conceptual approach for the work firstly establishes the two philosophical concepts and their characteristics (what they and their outcomes look like), and secondly how we might learn from them to understand and engage Colquhoun's problematic 'closed system' of the present. Colquhoun describes contemporary attempts by architects to engage the 'forms' of the 'other' as 'inescapably modern', Koestler describes the wider philosophical dilemma in 1969 as 'rebellion in a vacuum'. The methodology of the thesis involves a triangulated dialectic interface, a synthesis of three protagonists. These are the Victorian theorist and artist John Ruskin, the early modernist architect and designer Alvar Aalto and myself as a contemporary artist. Design of the study explores the historical and contextual continuity of the protagonists with critical input and exchange from secondary sources. The studio works as centered around Norseman Western Australia are location/nature/culturally/philosophically specific as advocated by Ruskin and Aalto. I show that there are meaningful and significant connections to be made between two key historical figures John Ruskin and Alvar Aalto as yet unexplored. Also, the manner in which architectural historians have overlooked the connections, and the difficulty they have in understanding Aalto, (for that matter Ruskin also) with multiple, contradictory even confused explanations. By embracing an epistemology appropriate to both men's beliefs facilitates a more robust understanding of them and their message for the contemporary condition, myself included. The studio component of the research offers an informed and challenging discourse. It is coupled with an exploration and approach in the developments of artifacts and their relationships within a shared epistemology/ontology.
Identification and characterisation of genes which are critical for murine gastrulation
Creators: name: Alzahrani, Alaa
Publisher: name: The Australian National University
Year: 2017
Subjects: gastrulation
heart
heterotaxy
laterality disorder
mouse
node
ENU
WES
Wnt signalling pathway

description: Gastrulation, a critical stage of embryogenesis, converts a group of relatively undifferentiated cells into the body plan of the growing foetus. Embryonic cells are allocated to one of three definitive germs layers and are organised with respect to three embryonic axes (anterior-posterior, dorsal-ventral and left-right). By the end of gastrulation the primordia of most organs and physiological systems have been established. In mammals, gastrulation occurs just after the embryo implants into the uterine wall. The small size of the mammalian gastrula and its inaccessibility means that, despite its central importance to embryonic development, gastrulation remains one of the most challenging and underexplored areas of mammalian biology. The study of other complex biological processes has been greatly facilitated by the use of genetic screens, which employ a powerful mutagen to introduce mutations into the germline of an organism and then examine descendants for altered biology (i.e. an abnormal phenotype) followed by post-hoc identification of the underlying genetic alteration. The utility of these screens is dependent upon quick, robust assays to identify pheno-deviants and it has long been thought that practical issues prevent this approach being applied to mammalian gastrulation. In this thesis, I examine this notion. In the first part of the thesis, I use phenotype analysis to infer the function of the gene altered in the katun mouse strain which was identified in a screen for mutations that alter embryonic development and was found to have a gastrulation phenotype. I show that the left-right axis defects in this strain are likely caused by dysregulated Wnt signalling at gastrulation which interferes with endoderm development. This confirms that mutants recovered from genetic screens can be used to infer gene function at gastrulation. In the second part of the thesis, I report results form a prototype, genome-wide, screen for recessive mutations that alter gastrulation. The screen was able to overcome the perceived difficulties of small litter sizes, of isolating a large number of gastrulation stage embryos, of distinguishing phenotypes from natural embryonic loss and of working with limiting amounts of genomic DNA. I demonstrate that mutant pedigrees can be identified, they can be maintained in the absence of genetic markers via test breeding protocols and that low-resolution meiotic mapping can be combined with next generation sequencing technologies to identify the causative mutation. This confirms that gastrulation is amenable to genetic dissection by mutagenesis and I suggest a protocol that could be used to conduct a larger scale, efficient screen to identify the genes that direct mammalian gastrulation.
title: The return of the bride : affiliation and alliance on Buru
title: Affiliation and alliance on Buru
titleType: AlternativeTitle
Creators: name: Grimes, Barbara D
Publisher: name: The Australian National University
Year: 1990
Subjects: subject: Kinship Indonesia Buru
subject: Social groups
subject: Subculture
subject: Buru (Indonesia) Social life and customs

description: On the island of Burn in the Indonesian province of Maluku certain social groups, called noro, play a very prominent role in society as do similar groups in many other societies of eastern Indonesia.1 Every individual in Buru society belongs to a noro and at any given point in time he or she can only belong to one noro. The noro an individual belongs to is the primary source of his or her social identity and prescribes relationships and interaction with other individuals and groups in society. Because of the significance of these social groups I began inquiring more about them and soon came to the question which eventually led to this study and provided a key which opened up a broader understanding of Buru society: "How is it determined to which noro an individual belongs?"
Supplementary Images from Proteomic method to extract, concentrate, digest and enrich peptides from fossils with coloured (humic) substances for mass spectrometry analyses
Creators: name: Schroeter, Elena R.
name: Blackburn, Kevin
name: Goshe, Michael B.
name: Schweitzer, Mary H.
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences

description: Additional images illustrating proteomic sample generation, stage tip assemply, and extracts from buffer-only negative controls.
Dilaton black holes with power law electrodynamics
Creators: name: Dehghani, M.
name: Setare, M. R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article, the new black hole solutions to the Einstein-power-Maxwell-dilaton gravity theory have been investigated in a four-dimensional space-time. The coupled scalar, electromagnetic and gravitational field equations have been solved in a static and spherically symmetric geometry. It has been shown that dilatonic potential, as the solution to the scalar field equation, can be written in the form of a generalized Liouville potential. Also, three classes of novel charged dilaton black hole solutions, in the presence of power law nonlinear electrodynamics, have been constructed out which are asymptotically non-flat and non-AdS. The conserved and thermodynamic quantities have been calculated from geometrical and thermodynamical approaches, separately. Since the results of these two alternative approaches are identical one can argue that the first law of black hole thermodynamics is valid for all of the new black hole solutions. The thermodynamic stability or phase transition of the black holes have been studied, making use of the canonical ensemble method. The points of type-1 and type-2 phase transitions as well as the ranges at which the black holes are stable have been indicated by considering the heat capacity of the new black hole solutions. The global stability of the black holes have been studied through the grand canonical ensemble method. Regarding the Gibbs free energy of the black holes, the points of Hawking-Page phase transition and ranges of the horizon radii at which the black holes are globally stable have been determined.
description: 21 pages with 9 captioned figures
Extracting Hidden Symmetry from the Energy Spectrum
Creators: name: Yuzbashyan, Emil A.
name: Happer, William
name: Altshuler, Boris L.
name: Shastry, B. Sriram
Publisher: name: arXiv
Year: 2002
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: In this paper we revisit the problem of finding hidden symmetries in quantum mechanical systems. Our interest in this problem was renewed by nontrivial degeneracies of a simple spin Hamiltonian used to model spin relaxation in alkali-metal vapors. We consider this spin Hamiltonian in detail and use this example to outline a general approach to finding symmetries when eigenvalues and eigenstates of the Hamiltonian are known. We extract all nontrivial symmetries responsible for the degeneracy and show that the symmetry group of the Hamiltonian is SU(2). The symmetry operators have a simple meaning which becomes transparent in the limit of large spin. As an additional example we apply the method to the Hydrogen atom.
description: 14 pages, 1 figure. A minor typo corrected
Flow field evolution and entrainment in a free surface plunging jet
Creators: name: Hassan, Syed Harris
name: Guo, Tianqi
name: Vlachos, Pavlos P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate ambient fluid entrainment and near-field flow characteristics of a free surface plunging jet for five Reynolds numbers ranging from 3000 to 10000 using time-resolved stereo particle image velocimetry (SPIV). We present time-averaged velocities, RMS velocity fluctuations, mean entrainment and unsteady flow features and compare them with previous studies on free jets. We find that plunging jets have a smaller potential core length, and earlier decay of the mean centerline velocity. The peak RMS velocity fluctuations occur at a location significantly upstream compared to the free jets reported in the literature. Near-field ambient fluid entrainment of plunging jets is measured for the first time and is found to be considerably higher than free jets in the low Reynolds number range. For the plunging jet case at Re = 3000, faster jet decay, higher levels of turbulent intensity in the near-field, and augmented mass entrainment result from strong primary vortices that give the turbulent/non-turbulent interface (TNTI) its convoluted shape which facilitates both bulk entrapment of ambient fluid and small scale nibbling because of larger surface area. These primary vortices occur right below the free surface and disintegrate into secondary structures at axial locations that are upstream compared to those of free jets. At higher Reynolds numbers, primary vortices are smaller in size, weak in swirling strength, and disintegrate prematurely, resulting in suppressed mixing and reduced entrainment efficiency.
Spacetime Defects: von Kármán vortex street like configurations
Creators: name: Letelier, Patricio S.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A special arrangement of spinning strings with dislocations similar to a von Kármán vortex street is studied. We numerically solve the geodesic equations for the special case of a test particle moving along twoinfinite rows of pure dislocations and also discuss the case of pure spinning defects.
description: 9 pages, 2figures, CQG in press
fda.usc Reference Card
Creators: name: Oviedo, Manuel
name: Febrero, Manuel
Publisher: name: Zenodo
Year: 2019
Subjects: Functional data analysis
R software

description: R reference card for fda.usc package. fda.usc R package available in http://cran.r-project.org/web/packages/fda.usc
description: Fundings: Programa Estatal de Investigación Científica y Técnica de Excelencia - Proyectos de I+D Ministerio de Economía y Competitividad
All-Optical Production of a Degenerate Fermi Gas
Creators: name: Granade, S. R.
name: Gehm, M. E.
name: O'Hara, K. M.
name: Thomas, J. E.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We achieve degeneracy in a mixture of the two lowest hyperfine states of $^6$Li by direct evaporation in a CO$_2$ laser trap, yielding the first all-optically produced degenerate Fermi gas. More than $10^5$ atoms are confined at temperatures below $4 μ$K at full trap depth, where the Fermi temperature for each state is $8 μ$K. This degenerate two-component mixture is ideal for exploring mechanisms of superconductivity ranging from Cooper pairing to Bose condensation of strongly bound pairs.
description: 4 pgs RevTeX with 2 eps figs, to be published in Phys. Rev. Lett
Structure of 16C from analyses of proton scattering data and the B(E2) problem
Creators: name: Karataglidis, S.
name: Murulane, K.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The B(E2) value for the decay of the 2+_1 state in 16C to ground has been the subject of much discussion. Analyses assuming a simple model of two neutrons coupled to a 14C core of the available data, which extend over an order of magnitude,gives reasonable agreement but with an inclusion of a large effective charge for the neutrons. To assess this situation, a large scale (2+4)hw shell model calculation of 16C has been made from which the wave functions have been used to obtain the B(E2) value. As a check, comparison is made with available data on the spectrum of 16C and intermediate-energy elastic proton scattering.
description: 6 pages, 2 figures
Tensor-Scalar Torsion
Creators: name: Gruver, Charro
name: Hammond, Richard
name: Kelly, P. F.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A theory of gravity with torsion is examined in which the torsion tensor is constructed from the exterior derivative of an antisymmetric rank two potential plus the dual of the gradient of a scalar field. Field equations for the theory are derived by demanding that the action be stationary under variations with respect to the metric, the antisymmetric potential, and the scalar field. A material action is introduced and the equations of motion are derived. The correct conservation law for rotational angular momentum plus spin is observed to hold in this theory.
description: 10 pages, LaTeX, Mod. Phys. Lett. A accepted