cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-Accuracy Analysis of Compton Scattering in Chiral Effective Field Theory: Status and Future
Creators: name: Griesshammer, Harald W.
name: Phillips, Daniel R.
name: McGovern, Judith A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Theory and prospects of Compton scattering on nucleons and light nuclei below 500 MeV are outlined; cf. Refs. [1-3]. Invited contribution at the Workshop to Explore Physics Opportunities with Intense, Polarized Electron Beams with Energy up to 300 MeV, MIT, Cambridge (USA), 14th-16th March 2013.
description: 5 pages LaTeX2e using aipproc including 2 figures as .eps file; corrected "7-Li" to "6-Li"; replaced plot of scalar polarisabilities with a more accurate version
Numerical smoothing with hierarchical adaptive sparse grids and quasi-Monte Carlo methods for efficient option pricing
Creators: name: Bayer, Christian
name: Ben Hammouda, Chiheb
name: Tempone, Raúl F.
Publisher: name: Weierstrass Institute
Year: 2022
Subjects: subject: Adaptive sparse grid quadrature
subject: quasi-Monte Carlo
subject: numerical smoothing
subject: Brownian bridge
subject: Richardson extrapolation
subject: option pricing
subject: Monte Carlo
subject: 65C05
subject: 65D30
subject: 65D32

description: When approximating the expectation of a functional of a stochastic process, the efficiency and performance of deterministic quadrature methods, such as sparse grid quadrature and quasi-Monte Carlo (QMC) methods, may critically depend on the regularity of the integrand. To overcome this issue and reveal the available regularity, we consider cases in which analytic smoothing cannot be performed, and introduce a novel numerical smoothing approach by combining a root finding algorithm with one-dimensional integration with respect to a single well-selected variable. We prove that under appropriate conditions, the resulting function of the remaining variables is a highly smooth function, potentially affording the improved efficiency of adaptive sparse grid quadrature (ASGQ) and QMC methods, particularly when combined with hierarchical transformations (i.e., Brownian bridge and Richardson extrapolation on the weak error). This approach facilitates the effective treatment of high dimensionality. Our study is motivated by option pricing problems, and our focus is on dynamics where the discretization of the asset price is necessary. Based on our analysis and numerical experiments, we show the advantages of combining numerical smoothing with the ASGQ and QMC methods over ASGQ and QMC methods without smoothing and the Monte Carlo approach.
Evolution of Warped Accretion Disks in Active Galactic Nuclei. I. Roles of Feeding at the Outer Boundaries
Creators: name: Li, Yan-Rong
name: Wang, Jian-Min
name: Cheng, Cheng
name: Qiu, Jie
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the alignment processes of spinning black holes and their surrounding warped accretion disks in a frame of two different types of feeding at the outer boundaries. We consider (1) fixed flows in which gas is continually fed with a preferred angular momentum, and (2) free flows in which there is no gas supply and the disks diffuse freely at their outer edges. As expected, we find that for the cases of fixed flows the black hole disk systems always end up aligning on timescales of several 1e6 yr, irrespective of the initial inclinations. If the initial inclination angles are larger than pi/2, the black hole accretion transits from retrograde to prograde fashion, and the accreted mass onto the black holes during these two phases is comparable. On the other hand, for the cases of free flows, both alignments and anti-alignments can occur, depending on the initial inclinations and the ratios of the angular momentum of the disks to that of the black holes. In such cases, the disks will be consumed within timescales of 1e6 yr by black holes accreting at the Eddington limit. We propose that there is a close connection between the black hole spin and the lifetime for which the feeding persists, which determines the observable episodic lifetimes of active galactic nuclei. We conclude that careful inclusion of the disk feeding at the outer boundaries is crucial for modeling the evolution of the black hole spin.
description: 12 pages and 9 figures; typos corrected and references added to match the published version
Visualizing Archival Collections for Fun and (Non)Profit Using Google Data Studio
Creators: name: Hodges, David W.
Publisher: name: Columbia University
Year: 2020
Subjects: Library science
Digital libraries
Libraries--Special collections
Information visualization

description: Presentation delivered at Code4Lib 2020, Pittsburgh, 11 March 2020. The presentation used archival collections data from Columbia University's distinctive collections to demonstrate the effectiveness of Google Data Studio combined with other data manipulation tools to visualize collections data in meaningful ways. The presentation discussed some of the pros and cons of this approach and suggested institutional scenarios for which it could be a good fit. Also deposited at https://osf.io/tc35h/.
Moderne Stromnetze als Schlüsselelement einer nachhaltigen Energieversorgung. TAB-Fokus
Creators: name: Grünwald, R.
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2015

description: Das deutsche Energiesystem befindet sich gegenwärtig mitten in einem Umbruchprozess historischen Ausmaßes. Dies bedeutet, dass sich die Anforderungen drastisch ändern, die an die Stromnetze gestellt werden müssen. Daraus erwächst ein erheblicher Handlungsdruck, die Netze aus- bzw. umzubauen sowie neue Betriebskonzepte zu entwickeln, damit eine zuverlässige und sichere Stromversorgung auch weiterhin gewährleistet werden kann. Für die zukünftige Entwicklung der Stromnetze existiert ein beträchtlicher Gestaltungsspielraum sowohl konzeptionell (z. B. zentral vs. dezentral) als auch bei der Technologieauswahl (z. B. Freileitungen vs. Erdkabel). In einem offenen gesellschaftlichen Diskurs sollten Präferenzen definiert und anschließend in politische Gestaltung umgesetzt werden.
INTEGRAL observations of Sco X-1: evidence for Comptonization up to 200 keV
Creators: name: Maiolino, T.
name: D'Amico, F.
name: Braga, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have analyzed a long-term database for Sco X-1 obtained with the telescope IBIS onboard the INTEGRAL satellite in order to study the hard X-ray behavior of Sco X-1 from 20 up to 200 keV. Besides the data used for producing of the INTEGRAL catalog of sources, this is the longest (412 ks) database of IBIS on Sco X-1 up to date. The production of hard X-ray tails in low-mass X-ray binaries is still a matter of debate. Since most of the fits to the high-energy part of the spectra are done with powerlaw models, the physical mechanism for the hard X-ray tail production is unclear. The purpose of this study is to better constrain those possible mechanisms. Our main result shows a strong correlation between the fluxes in the thermal and nonthermal part of Sco X-1 spectra. We thus suggest that Comptonization of lower energy photons is the mechanism for producing hard X-ray tails in Sco X-1.
description: 4 pages, 3 figures, 2 tables; officially accepted for publication (as a Letter) by A&A in 2013 January 22
Presheaf models of quantum computation: an outline
Creators: name: Malherbe, Octavio
name: Scott, Philip
name: Selinger, Peter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: This paper outlines the construction of categorical models of higher-order quantum computation. We construct a concrete denotational semantics of Selinger and Valiron's quantum lambda calculus, which was previously an open problem. We do this by considering presheaves over appropriate base categories arising from first-order quantum computation. The main technical ingredients are Day's convolution theory and Kelly and Freyd's notion of continuity of functors. We first give an abstract description of the properties required of the base categories for the model construction to work. We then exhibit a specific example of base categories satisfying these properties.
description: 17 pages
Stroke prevention strategies in Africa: a scoping review protocol
Creators: name: Umeonwuka, Chuka
name: Obiora, Oluchukwu
name: Ntsiea, Veronica
Publisher: name: figshare
Year: 2022
Subjects: Neurology and neuromuscular diseases

description: This scoping review will map the existing methods including interventions aimed at both primary and secondary stroke prevention in Africa.
 The JBI methodological framework for scoping reviews will be adopted for this scoping review. A three-step search strategy, consisting of an initial limited search, a full search, and a screening of the reference lists of all included articles will be undertaken
Digital media in education. TAB-Fokus
Creators: name: Revermann, Christoph
name: Albrecht, Steffen
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2016

description: The digitalisation, miniaturisation, portability and interconnectedness of media dynamically influence virtually all parts of society. The new digital media have complex implications for all education stakeholders regarding the form, content, means and basic conditions of education. Teaching how to use digital media in a sensible way related to daily life, work and life in general – which represents a central cultural technology – has become an important task in the various areas of education. However, it is difficult to test the skills required to use digital media, the critical reflection of their use as well as their significance with regard to whether the use of digital media is effective for teaching and learning. There is no assured data or knowledge that serves as a basis for the design of proper media education within educational institutions or education policy regulations. Such a basis would allow anyone to make use of the opportunities of professional, cultural and social participation associated with the new digital media.
f(R,T) Cosmological Models in Phase Space
Creators: name: Shabani, Hamid
name: Farhoudi, Mehrdad
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We investigate cosmological solutions of f(R,T) modified theories of gravity for perfect fluid in spatially FLRW metric through phase space analysis, where R is Ricci scalar and T denotes the trace of energy-momentum tensor of matter content. We explore and analyze three general theories with Lagrangians of minimal $g(R)+h(T)$, pure non--minimal g(R)h(T) and non-minimal $g(R)(1+h(T))$ couplings through dynamical systems approach. We introduce a few variables and dimensionless parameters to simplify the equations in more concise forms. The conservation of energy-momentum tensor leads to a constraint equation that, in the minimal gravity, confines functionality of h(T) to a particular form, hence, relates the dynamical variables. In this case, acceptable cosmological solutions that contain a long enough matter dominated era followed by a late-time accelerated expansion are found. To support theoretical results, we also obtain numerical solutions for a few functions of g(R), and results of the corresponding models confirm the predictions. We classify solutions into six classes which demonstrate more acceptable solutions and there is more freedom to have the matter dominated era than in the f(R) gravity. In particular, there is a new fixed point which can represent late-time acceleration. We draw different diagrams of the matter densities (consistent with the present values), the related scale factors and effective equation of state. The corresponding diagrams of parameters illustrate that there is a saddle acceleration era which is a middle era before final stable acceleration de Sitter era for some models. All presented diagrams determine radiation, matter and late-time acceleration eras very well.
description: 30 pages, many figures, some corrections made, Refs. added
Incidence of gummosis disease in silky hakea under natural conditions in South Africa
Creators: name: Wood, Alan R
name: Breeyen, Alana Den
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology

description: The pathogen Colletotrichum acutatum J.H.Simmonds was developed in South Africa during the 1980s as a mycoherbicide to control invasive silky hakea (Hakea sericea Schrad. & J.C.Wendl.) and was subsequently widely used by a variety of land managers to induce gummosis disease. To determine persistence under natural conditions, disease incidence and severity were monitored annually at five sites in the Western Cape and Eastern Cape provinces, from 2008 until 2017. Disease incidence ranged between 12% and 95% of trees with gummosis in the first year. At four of the sites, high levels of mortality were recorded during the first four years of monitoring. In the year with the highest mortality, between 38 and 64% of trees were dead. No mortality was recorded at the fifth site. Disease incidence and mortality were reduced in the latter years, coinciding with drier conditions. At three of the sites, fires occurred once during the course of monitoring and the disease reappeared one to three years post-fire. It was concluded that although the disease will persist under natural conditions, for maximum benefit the fungus should be actively applied to maintain high levels of incidence and mortality. Depending on site characteristics and weather trends, this should be on an annual, bi- or triennial basis, or following fires or dry years.
Properties of Bipolar Fuzzy Hypergraphs
Creators: name: Akram, M.
name: Dudek, W. A.
name: Sarwar, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C99

description: In this article, we apply the concept of bipolar fuzzy sets to hypergraphs and investigate some properties of bipolar fuzzy hypergraphs. We introduce the notion of $A-$ tempered bipolar fuzzy hypergraphs and present some of their properties. We also present application examples of bipolar fuzzy hypergraphs.
Quantum discord and its geometric measure with death entanglement in correlated dephasing two qubits system
Creators: name: Mohamed, Abdel-Baset A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum correlations, including entanglement and discord with its geometric measure, and classical correlation are studied for a bipartite partition of a open or closed quantum system. It is found that the purity of the initial state plays an important role in the dynamics of quantum and classical correlations. In the dephasing model, the quantum correlations loss and the classical correlation gain are instantaneously happen. While, the purity of the initial state destroys the quantum correlations which is resulted by the unitary interaction. Therefore, with the purity parameter, a particular region in which there is no state have quantum correlations can be determined.
Direct observation of non-fully-symmetric coherent optical phonons by femtosecond x-ray diffraction
Creators: name: Johnson, S. L.
name: Beaud, P.
name: Möhr-Vorobeva, E.
name: Caviezel, A.
name: Ingold, G.
name: Milne, C. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We directly measure by femtosecond time-resolved x-ray diffraction the E$_g$ symmetry coherent phonon excited in bismuth by strong optical excitation. The magnitude of the E$_g$ mode observed is 0.2 pm peak-to-peak, compared against the 2.7 pm initial displacement of the fully-symmetric A$_{1g}$ mode. The much smaller motion of the E$_g$ mode is a consequence of the short lifetime of the electronic states that drive the atomic motion. The experimentally measured magnitude of the E$_g$ motion allows us to rule out a previously suggested scenario for explaining the dynamics in bismuth that relies on strong coupling between these modes.
Digitale Medien in der Bildung. TAB-Fokus
Creators: name: Revermann, Christoph
name: Albrecht, Steffen
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2016

description: Digitalisierung, Miniaturisierung, Portabilität und Vernetzung der Medien beeinflussen dynamisch nahezu alle Bereiche der Gesellschaft. Die neuen digitalen Medien bedingen vielschichtige Folgen für alle Bildungsbeteiligten hinsichtlich der Formen, Inhalte, Mittel und Rahmenbedingungen. Die Vermittlung einer sinnvollen, alltags-, berufs- und lebensrelevanten Nutzung digitaler Medien als zentrale Kulturtechnik ist eine wichtige pädagogische Aufgabe in den verschiedenen Bildungsbereichen geworden. Die Kompetenzen im Umgang mit digitalen Medien, die kritische Reflexion ihrer Nutzung und ihre Bedeutung für die Lehr- und Lernwirksamkeit sind jedoch schwer zu überprüfen bzw. nachzuweisen. Es fehlt an gesicherten Daten- und Wissensbeständen als Grundlage für adäquate Konzepte einer Medienbildung in Bildungseinrichtungen oder für eine bildungspolitische Regulierung, damit die mit den neuen digitalen Medien verbundenen Chancen der beruflichen, kulturellen und sozialen Teilhabe möglichst von allen kompetent genutzt werden können.
Order estimations of the best approximations and approximations of the Fourier sums on the classes of infinitely differentiable functions
Creators: name: Serdyuk, A. S.
name: Stepaniuk, T. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We obtained order estimations for the best uniform approximations by trigonometric polynomials and approximations by Fourier sums of classes of $2π$-periodic continuous functions, which $(ψ,β)$-derivatives $f_β^ψ$ belong to unit balls of spaces $L_{p}, 1\leq p
description: 22 pages, in Ukrainian
title: Music educator's lived experiences with teacher-directed violence in Newfoundland and Labrador
Creators: name: Lawton, Rosemary C.
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: Violence directed against educators is becoming a growing phenomenon in K-12 school systems across the globe. While numerous studies on violence against classroom educators exist, after extensive research, I have not discovered any studies that focus on music educators. This present study explores the shared experiences of classroom music educators in Newfoundland and Labrador who have been victims of violence in their classrooms. Through the implementation of a survey with 49 participants and a focus group with four participants, this study analyzes the risk of violence toward music educators, explores the potential causes of violence against music educators, and offers possible solutions that can help mitigate or prevent the risk for future incidents of violence. This study invites policymakers, administrators, and music educators to reevaluate their current practices.
Constraining stellar CME occurrence from optical spectra
Creators: name: Odert, P.
name: Leitzinger, M.
name: Heinzel, P.
Publisher: name: Zenodo
Year: 2022
Subjects: Stellar activity
Stellar coronal mass ejections
Stellar flares

description: Optical spectroscopic observations sometimes show asymmetrically broadened wings and/or transient extra-emissions in chromospheric lines. Such events appear most commonly on active M dwarfs. These signatures could be due to prominence eruptions, which are closely related to CMEs on the Sun. We estimate the expected signatures of prominence eruptions in the Balmer lines using a simple radiative transfer model, thereby constraining the parameter ranges of observable events. In contrast to our previous study, we include the contribution of thermal emission in addition to scattering and find that this improves the observability of prominence eruptions on M dwarfs compared to a Sun-like star.
description: Acknowledgments: Austrian Science Fund (FWF): P30949-N36, I 5711-N; Czech Science Foundation 19-17102S, 22-34841S; 'Excellence Initiative - Research University' 2020-2026 at University of Wrocław project No. BPIDUB.4610.96.2021.KG.
description: {"references": ["Fuhrmeister, B. et al. (2018), A&A, 615, A14", "Heinzel, P. et al. (1987), A&A, 183, 351", "Heinzel, P. (1995), A&A, 299, 563", "Heinzel, P. (2015), ASSL, 415, 103", "Houdebine, E. R. et al. (1990), A&A, 238, 249", "Leitzinger, M. et al. (2022), MNRAS, 513, 6058", "Leitzinger, M. et al. (2022), Poster at Cool Stars 21, doi:10.5281/zenodo.7404528", "Muheki, P. et al. (2020), A&A, 637, A13", "Namekata, K. et al. (2021), NatAs, 6, 241", "Odert, P. et al. (2020), MNRAS, 494, 3766", "Odert P. et al. (2022), Poster at Cool Stars 21, doi:10.5281/zenodo.7404641", "Vida, K. et al. (2016), A&A, 590, A11", "Vida, K. et al. (2019), A&A, 623, A49", "Webb, D. F. (2015), ASSL, 415, 411"]}
Impossibility of Spontaneously Rotating Time-Crystals: A No-Go Theorem
Creators: name: Bruno, Patrick
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: I present arguments indicating the impossibility of spontaneously rotating quantum timecrystals, as recently proposed by Frank Wilczek [arXiv:1202.2539]. In particular, I prove a No-Go Theorem, rigorously ruling out the possibility of spontaneous ground-state (or thermal equilibrium) rotation for a broad class of systems.
description: 5 pages (main paper) + 5 pages (supplemental material); v2: typos corrected, references updated; v3: final version, as published (minor changes with respect to v2)
New electronic media and addictive behaviour. TAB-Fokus
Creators: name: Evers-Wölk, Michaela
name: Opielka, Michael
name: Sonk, Matthias
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2016

description: The temporal, spatial and social proliferation of electronic media continues to accelerate. For adults, children and young people, media worlds are likely to become a central living space with a strong pull. Addiction to or dependence on electronic media are discussed, in the context of being subject to culturally characterized patterns of interpretation and social constructs – not unlike the approach to addiction in general. In studies, a distinguishing line is drawn between general Internet addiction and specific forms of addiction such as addiction to online gaming, to social networking, to online shopping, to online sex or to online gambling. In reviews and articles on media addiction available for this study, the understanding of the terms which are used, the assessment of behaviours and the procedure for defining the study variables within the framework of empirical research differ considerably. There is substantial need for further research in this comparatively young scientific field. This is particularly valid considering that intensive use of media is increasingly becoming a part of the population’s normal behaviour – and even is expected for professional reasons.
Note: Computer controlled rotation mount for large diameter optics
Creators: name: Rakonjac, Ana
name: Roberts, Kris O.
name: Deb, Amita B.
name: Kjærgaard, Niels
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We describe the construction of a motorized optical rotation mount with a 40 mm clear aperture. The device is used to remotely control the power of large diameter laser beams for a magneto-optical trap (MOT). A piezo-electric ultrasonic motor on a printed circuit board (PCB) provides rotation with a precision better than 0.03 deg and allows for a very compact design. The rotation unit is controlled from a computer via serial communication, making integration into most software control platforms straightforward.
description: 3 pages, 4 figures, 1 movie link, supplementary files link, accepted for publication in RSI
Using classical bit-flip correction for error mitigation in quantum computations including 2-qubit correlations
Creators: name: Alexandrou, Constantia
name: Funcke, Lena
name: Hartung, Tobias
name: Jansen, Karl
name: Kuehn, Stefan
name: Polykratis, Georgios
name: Stornati, Paolo
name: Wang, Xiaoyang
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: readout, error
qubit
correlation
hardware
computer

description: We present an error mitigation scheme which corrects readout errors on Noisy Intermediate-Scale Quantum (NISQ) computers [1,2]. After a short review of applying the method to one qubit, we proceed to discuss the case when correlations between different qubits occur. We demonstrate how the readout error can be mitigated in this case. By performing experiments on IBMQ hardware, we show that such correlations do not have a strong effect on the results, justifying to neglect them.
What Are the Progenitors of Compact, Massive, Quiescent Galaxies at z=2.3? The Population of Massive Galaxies at z>3 from NMBS and CANDELS
Creators: name: Stefanon, Mauro
name: Marchesini, Danilo
name: Rudnick, Gregory H.
name: Brammer, Gabriel B.
name: Whitaker, Katherine E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: [Abridged] Using public data from the NMBS and CANDELS surveys, we study the population of massive galaxies at z>3 to identify the potential progenitors of z~2 compact, massive, quiescent (CMQ) galaxies, furthering our understanding of the evolution of massive galaxies. Our work is enabled by high-resolution CANDELS images and accurate photometric redshifts, stellar masses and star formation rates (SFRs) from 37-band NMBS photometry. The total number of z>3 massive galaxies is consistent with the number of massive quiescent (MQ) galaxies at z~2, implying that the SFRs for all of these galaxies must be much lower by z~2. We discover 4 CMQ galaxies at z>3, pushing back the time for which such galaxies have been observed. However, the volume density for these galaxies is significantly less than that of galaxies at z<2 with similar masses, SFRs, and sizes, implying that additional CMQ galaxies must be created in the ~1 Gyr between z=3 and z=2. We find 5 star-forming galaxies at z~3 that are compact (Re<1.4 kpc) and have stellar mass M*>10^(10.6)Msun, likely to become members of the CMQ galaxy population at z~2. We evolve the stellar masses and SFRs of each individual z>3 galaxy adopting 5 different star formation histories (SFHs) and studying the resulting population of massive galaxies at z=2.3. We find that declining or truncated SFHs are necessary to match the observed number density of MQ galaxies at z~2, whereas a constant SFH results in a number density significantly smaller than observed. All of our assumed SFHs imply number densities of CMQ galaxies at z~2 that are consistent with the observed number density. Better agreement with the observed number density of CMQ galaxies at z~2 is obtained if merging is included in the analysis and better still if star formation quenching is assumed to shortly follow the merging event, as implied by recent models of formation of MQ galaxies.
description: Re-submitted to ApJ after addressing referee's report
Multiwavelength observations of V479 Andromedae: a close compact binary with an identity crisis
Creators: name: Gonzalez-Buitrago, Diego
name: Tovmassian, Gagik
name: Zharikov, Sergey
name: Yungelson, Lev
name: Miyaji, Takamitsu
name: Echevarria, Juan
name: Aviles, Andres
name: Valyavin, Gennady
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We conducted a multi-wavelength study to unveil the properties of the extremely long-period cataclysmic variable V479 And. We performed series of observations, including moderate to high spectral resolution optical spectrophotometry, X-ray observations with Swift, linear polarimetry and near-IR photometry. This binary system is a low-inclination ~ 17^o system with a 0.594093(4) day orbital period. The absorption line complex in the spectra indicate a G8--K0 spectral type for the donor star, which has departed from the zero-age main sequence. This implies a distance to the object of about 4 kpc. The primary is probably a massive 1.1-1.4 Msun magnetic white dwarf, accreting matter at a rate M(dot) > 10^-10 Msun/ yr. This rate can be achieved if the donor star fills its corresponding Roche lobe, but there is little observational evidence for a mass-transfer stream in this system. An alternative explanation is a stellar wind from the donor star, although such a high rate mass loss is not anticipated from a subgiant. If the strongly magnetic white dwarf in V479 And. is confirmed by future observations, the system the polar with the longest observed orbital period. We also discuss the evolutionary state of V479 And.
description: 12 pages, 12 figures, accepted for publication in Astronomy and Astrophysics
Substellar Dynamical Masses: Progress & Precision, Validations & Vexations
Creators: name: Dupuy, Trent J.
name: Liu, Michael C.
name: Brandt, G. Mirek
name: Brandt, Timothy D.
name: Chen, Minghan
name: Li, Yiting
name: Cardoso, Cátia V.
name: McCaughrean, Mark J.
Publisher: name: Zenodo
Year: 2022

description: The strongest tests of substellar evolutionary models require measurements of the fundamental parameters of mass and/or age. In the third decade of observational brown dwarf science that we are currently in, there has been major progress in using high-precision mass benchmarks to distinguish between competing substellar models. Binary brown dwarfs with individual dynamical mass measurements serve as "mini-clusters" to probe the luminosity/temperature evolution of brown dwarfs, and we present new results for epsilon Indi Bab, which now has the highest-precision masses of any brown dwarfs (0.5% uncertainties). epsilon Indi Bab confirms previous evidence that cooling slows during the L/T transition, for the first time in a system with a post-L/T-transition component. Gaia astrometry has opened the door to precise mass measurements of substellar companions on wide, centuries-long orbits. While this blossoming of dynamical mass results has often validated the predictions of existing models, not all measurements are in harmony with theory, with some brown dwarfs seeming to be too massive and others not massive enough. In the fourth decade of brown dwarf science to come, our ongoing orbit monitoring of the coldest brown dwarfs will offer the chance of more validations, or vexations, for objects approaching planetary masses (~10-20 MJup).
description: {"references": ["Dupuy, T. J., & Liu, M. C. (2017), ApJS, 231, 15", "Chen, M., Li, Y., Brandt, T. D., Dupuy, T. J., Cardoso, C. V., & McCaughrean, M. J. (2022), AJ, 163, 288", "Dupuy, T. J., Liu, M. C., & Ireland, M. J. (2009), ApJ, 692, 729", "Beatty, T. G., Morley, C. V., Curtis, J. L., Burrows, A., Davenport, J. R. A., & Montet, B. T. (2018), AJ, 156, 168", "Brandt, G. M., Dupuy, T. J., Li, Y., Chen, M., Brandt, T. D., Wong, T. L. S., Currie, T., Bowler, B. P., Liu, M. C., Best, W. M. J., & Phillips, M. W. (2021), AJ, 162, 301"]}
Law of refraction for generalised confocal lenslet arrays
Creators: name: Oxburgh, Stephen
name: White, Chris D.
name: Antoniou, Georgios
name: Courtial, Johannes
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We derive the law of generalised refraction for generalised confocal lenslet arrays, which are arrays of misaligned telescopes. We have implemented this law of refraction in TIM, a custom open-source ray tracer.
description: 4 pages, 3 figures
Fokusprojekt SaxFDM DMP auf der Love Data Week
Creators: name: Hundt, Carolin
name: Becker, Carina
Publisher: name: Zenodo
Year: 2023
Subjects: DMP
SaxFDM

description: Das Fokusprojekt SaxFDM-DMP hat im Rahmen der Love Data Week sowohl spannende Einblicke in die Funktionalitäten aktueller DMP-Tools gegeben, als auch erste Ansätze zum Entwurf eigener Lösungen für die niederschwellige und schnelle Erstellung von Datenmanagementplänen vorgestellt.
title: Geodiversity and human difference: disability, landscape form and process
Creators: name: Clive, Rachel
Publisher: name: University of Glasgow
Year: 2021

description: This thesis has emerged from a practice-based and interdisciplinary doctoral studentship at the University of Glasgow. It proposes The Performic Cycle as a new contribution to knowledge. The Performic Cycle is an adaptive model of theatre practice-based research which supports performative explorations of human/landscape relationship. The model has been created in collaboration with more than 40 neurodivergent (largely learning-disabled and autistic) trainee performers and horticulturalists from across Central Scotland, through five exploratory and experimental performance projects called The Panarchy Projects. The Panarchy Projects focus on human performances with rivers and estuaries. Documentation of The Panarchy Projects can be found here: Link to Panarchy Projects documentation. The Performic Cycle model works across disciplinary boundaries and through human differences. It hopes to contribute to a growing body of site-responsive interdisciplinary research which is making connections between environmental and social justice. The Panarchy Projects were created in collaboration with the following artists, performers, organisations, horticultural workers/students/trainees, support workers, and friends: Panarchy 1: Euan Hayton, Krissy Neilson, Andrew Lamb, Paul Michael Henry, Susan Worsfold, Lindsay Brown, Carlton Studios and Tony Sweeten. Panarchy 2: Chris Ford, Giles Nicholson, Ben Marriott and Tracey Paddison. Panarchy 3: Hughie McIntyre, Chloe Maxwell, Paul Robertson, “Andrew,” Karen Stewart, Cheryl MacArthur, Laraine McLeish, Adnan Mohammad, Peter McInnes, Tracy Vannet, “T-Dollar,” “Blunderbus,” “Tyler Timpson,” Donna-Marie Stillie, Nikki Frew, Craig Devlin, Louise Brown, Euan Hayton, Lindsay Brown, Bel Pye. A partnership with Citizens’ Theatre Friday Club. Panarchy 4: Craig Jackson, Sam Ridley, Cameron Browne, Georgia Dullagun, Amanda Martin, Marjorie Martin, Patrick McLean, Daniel McLean, John McAlpine, Craig Denny, Ashleigh Rider, Robyn Horsburgh, Barry, Chloe, Danny, Willy, Michael, Scott, “David,” Jamie Little, Jamie Henderson, Neil Ferrier, David Goodall, Ewa Kuniczak, Gartmore House, MacRobert Arts Centre, Play Alloa, Emma McCaffrey/Reluctant Penguin Productions, Maria Oller/Lung Ha Theatre Company, Liam Kelly, Anne Shore, David Thomas, Jo Sharp, Key Housing, Inclusion Scotland, West Moss Side Farm and Sniffer Scotland. A partnership with Green Routes Horticultural Training Centre. not panicky: Chloe Maxwell, Alison Mackenzie, Euan Hayton, Hughie McIntyre, Jassy Earl, Susan Worsfold, Tony Sweeten, Karyn Priestley, Ashley Andrews, SoundsMove and Inclusion Scotland. With ethical approval from UoG College of Arts. Application no. 100180004
Milky Way Demographics with the VVV Survey II. Color Transformations and Near-Infrared Photometry for 136 Million Stars in the Southern Galactic Disk
Creators: name: Soto, M.
name: Barba, R.
name: Gunthardt, G.
name: Minniti, D.
name: Lucas, P.
name: Majaess, D.
name: Irwin, M.
name: Emerson, J. P.
name: Gonzalez-Solares, E.
name: Hempel, M.
name: Saito, R. K.
name: Gurovich, S.
name: Roman-Lopes, A.
name: Moni-Bidin, C.
name: Santucho, M. V.
name: Borissova, J.
name: Kurtev, R.
name: Toledo, I.
name: Geisler, D.
name: Dominguez, M.
name: Beamin, J. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The new multi-epoch near-infrared VVV survey (VISTA Variables in the Via Lactea) is sampling 562 sq. deg of the Galactic bulge and adjacent regions of the disk. Accurate astrometry established for the region surveyed allows the VVV data to be merged with overlapping surveys (e.g., GLIMPSE, WISE, 2MASS, etc.), thereby enabling the construction of longer baseline spectral energy distributions for astronomical targets. However, in order to maximize use of the VVV data, a set of transformation equations are required to place the VVV JHKs photometry onto the 2MASS system. The impetus for this work is to develop those transformations via a comparison of 2MASS targets in 152 VVV fields sampling the Galactic disk. The transformation coefficients derived exhibit a reliance on variables such as extinction. The transformed data were subsequently employed to establish a mean reddening law of E_{J-H}/E_{H-Ks}=2.13 +/- 0.04, which is the most precise determination to date and merely emphasizes the pertinence of the VVV data for determining such important parameters.
description: 24 pages, 12 figures, published in A&A
Quark-Hadron Phase Transition in the PNJL model for interacting quarks
Creators: name: Yamazaki, Kanako
name: Matsui, T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study quark-hadron phase transition at finite temperature with zero net baryon density by the Nambu-Jona-Lasinio model for interacting quarks in uniform background temporal color gauge fields. At low temperatures, unphysical thermal quark-antiquark excitations which would appear in the mean field approximation, are eliminated by en- forcing vanishing expectation value of the Polyakov-loop of the background gauge field, while at high temperatures this expectation value is taken as unity allowing thermal excitations of free quarks and antiquarks. Mesonic excitations in the low temperature phase appear in the correlation energy as contributions of collective excitations. We describe them in terms of thermal fluctuations of auxiliary fields in one-loop (Gaus- sian) approximation, where pions appear as Nambu-Goldstone modes associated with dynamical symmetry breaking of the chiral symmetry in the limit of vanishing bare quark masses. We show that at low temperatures the equations of state reduces to that of free meson gas with small corrections arising from the composite nature of mesons. At high temperatures, all these collective mesonic excitations melt into continuum of quark anti-quark excitations and mesonic correlations gives only small contributions the pressure of the system.
description: 33 pages, 11 figures. arXiv admin note: substantial text overlap with arXiv:1206.4921
Optimal damping with hierarchical adaptive quadrature for efficient Fourier pricing of multi-asset options in Lévy models
Creators: name: Bayer, Christian
name: Ben Hammouda, Chiheb
name: Papapantoleon, Antonis
name: Samet, Michael
name: Tempone, Raúl
Publisher: name: Weierstrass Institute
Year: 2022
Subjects: subject: Option pricing
subject: Fourier methods
subject: damping parameters
subject: adaptive sparse grid quadrature
subject: basket and rainbow options
subject: multivariat Lévy models
subject: 65D32
subject: 65T50
subject: 65Y20

description: Efficient pricing of multi-asset options is a challenging problem in quantitative finance. When the characteristic function is available, Fourier-based methods become competitive compared to alternative techniques because the integrand in the frequency space has often higher regularity than in the physical space. However, when designing a numerical quadrature method for most of these Fourier pricing approaches, two key aspects affecting the numerical complexity should be carefully considered: (i) the choice of the damping parameters that ensure integrability and control the regularity class of the integrand and (ii) the effective treatment of the high dimensionality. To address these challenges, we propose an efficient numerical method for pricing European multi-asset options based on two complementary ideas. First, we smooth the Fourier integrand via an optimized choice of damping parameters based on a proposed heuristic optimization rule. Second, we use sparsification and dimension-adaptivity techniques to accelerate the convergence of the quadrature in high dimensions. Our extensive numerical study on basket and rainbow options under the multivariate geometric Brownian motion and some Lévy models demonstrates the advantages of adaptivity and our damping rule on the numerical complexity of the quadrature methods. Moreover, our approach achieves substantial computational gains compared to the Monte Carlo method.
Neue elektronische Medien und Suchtverhalten. TAB-Fokus
Creators: name: Evers-Wölk, Michaela
name: Opielka, Michael
name: Sonk, Matthias
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2016

description: Die zeitliche, räumliche und soziale Verbreitung elektronischer Medien beschleunigt sich weiterhin. Für Erwachsene, Kinder und Jugendliche können mediale Welten zum zentralen Lebensraum mit Sogwirkung werden. Infolgedessen wird verstärkt die Sucht bzw. Abhängigkeit nach elektronischen Medien diskutiert, die – wie der Suchtbegriff insgesamt – kulturell geprägten Deutungsmustern und sozialen Konstruktionen unterliegt. In Studien wird eine allgemeine sowie verschiedene Formen spezifischer Internetsucht, z.B. Onlinespielsucht, Social-Network-Sucht, Onlinekaufsucht, Onlinesexsucht, Onlineglücksspielsucht, unterschieden. Das Begriffsverständnis, die Bewertung des Verhaltens und auch die Vorgehensweise bei der Definition der Untersuchungsvariablen im Rahmen empirischer Forschung weichen in den bekannten Studien zur Mediensucht erheblich voneinander ab. In dem vergleichsweise jungen Forschungsgebiet besteht großer Forschungsbedarf. Dies gilt insbesondere vor dem Hintergrund, dass intensive Mediennutzung zunehmend zum Normalverhalten der Bevölkerung zählt und nicht zuletzt oft aus beruflichen Gründen erwartet wird.
Generalized CP symmetries in Delta(27) flavor models
Creators: name: Nishi, C. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We classify explicitly all the possible generalized CP (GCP) symmetries that are definable in $Δ(27)$ flavor models. In total, only 12 transformations are possible. We also show interesting consequences of considering some of them as residual symmetries of the neutrino sector.
description: 16 pages. Comment on independent consistency condition. To appear in PRD
Maximal near-field radiative heat transfer between two plates
Creators: name: Nefzaoui, Elyes
name: Ezzahri, Younès
name: Drevillon, Jérémie
name: Joulain, Karl
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A parametric study of Drude and Lorentz models performances in maximizing near-field radiative heat transfer between two semi-infinite planes separated by nanometric distances at room temperature is presented in this paper. Optimal parameters of these models that provide optical properties maximizing the radiative heat flux are reported and compared to real materials usually considered in similar studies, silicon carbide and heavily doped silicon in this case. Results are obtained by exact and approximate (in the extreme near-field regime and the electrostatic limit hypothesis) calculations. The two methods are compared in terms of accuracy and CPU resources consumption. Their differences are explained according to a mesoscopic description of near-field radiative heat transfer. Finally, the frequently assumed hypothesis which states a maximal radiative heat transfer when the two semi-infinite planes are of identical materials is numerically confirmed. Its subsequent practical constraints are then discussed.
description: 19 pages, 11 figures, submitted to Journal of Physics D : Applied Physics
SECRETed H2020 project - 3rd Newsletter
Creators: name: EXELISISPC
Publisher: name: Zenodo
Year: 2023
Subjects: dissemination
Newsletter
SECRETed
surfactants
siderophores
biology
compounds
encapsulation
cosmetics
biotechnology
agrochemicals
pharmaceuticals
nutraceuticals
food supplements
antitumor
diagnostics
opthalmology
industry

description: The SECRETed project is aligned with the development of novel biosurfactants and siderophore compounds with custom-made properties taking advantage of aquatic micro-organisms. This Newsletter presents the:
1. Brief SECRETed intro
2. Listed stakeholders
3. Progress and achievements
4. Dissemination activities
title: Polymer Brush/Metal Nanoparticle Hybrids for Optical Sensor Applications: from Self-Assembly to Tailored Functions and Nanoengineering
Creators: name: Christau, Stephanie
name: Genzer, Jan
name: Klitzing, Regine von
Publisher: name: De Gruyter
Year: 2022

description: This review article summarizes the progress of research in the field ofpolymer brush/metal nanoparticle hybrid materials. We will discuss the mutualinfluence of polymer brush matrix and particles. Self-assembly of particles withinpolymer brushes, and ways to control the loading and location of nanoparticlesinside polymer brushes will be described, as well as the possibility to use thebrush templates as nanoreactors to generate metal nanoparticles. The combination of stimuli-responsive polymer brushes and nanoparticles exhibiting surface plasmon resonance, such as gold or silver, enables the design of opticalsensors based on reversible variations of the brush conformation. Sensing devices are capable of detecting avariety of extrinsic variations in their surrounding enviroments. The progress in the development of such optical sensors usingbrush/particle hybrids will be discussed in more detail.
Bilanz der Sommerzeit. TAB-Fokus
Creators: name: Caviezel, C.
name: Revermann, Christoph
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2016

description: Die Richtlinie 2000/84/EG schreibt die Anwendung der Sommerzeit für alle EU-Mitgliedstaaten verbindlich und auf unbegrenzte Dauer vor. Jede Änderung der Sommerzeit erfordert eine Änderung dieser Richtlinie. Die EU-Kommission gelangte 2007 zum Fazit, dass die Auswirkungen der Sommerzeit kaum ins Gewicht fielen. In Bezug auf energetische Aspekte kann dieses Fazit auf der Basis des aktuellen Erkenntnisstandes als nach wie vor gültig erachtet werden. Auch finden sich keine Anhaltspunkte dafür, das Fazit hinsichtlich wirtschaftlicher Aspekte infrage zu stellen. In Bezug auf gesundheitheitliche Aspekte ist weitere Forschung notwendig, um die zeitumstellungsbedingten kurz- und langfristigen Folgen eingehender untersuchen und bewerten zu können. Eine Änderung der Richtlinie 2000/84/EG kann auf verschiedenen Wegen angestoßen werden. Ob ein Änderungsverfahren eingeleitet wird, liegt im Ermessen der EU-Kommission.