cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Looking back in the rearview: Insights into Queensland’s rear-end crashes
Creators: name: Swain, Ritwik
name: Larue, Grégoire S.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer

description: Rear-end crashes cost the most out of any crash type to the Compulsory Third Party insurance scheme of Queensland. Rear-end crashes are also one of the most common types of crashes, peaking as the most common type of crash in Queensland in 2019. This study investigated the environmental, driver, and vehicle characteristics associated with rear-end collisions in Queensland, Australia. A totle of 367,230 crashes in the Queensland crash database between 2001 and 2021 were used to identify crash trends in Queensland, particularly related to rear-end crashes. For crashes between 2015 and 2021, additional information was gathered and allowed further analysis of factors contributing to rear-end crashes using the quasi-induced exposure method. Two binary classification tree models were used. Model 1 investigated the environmental characteristics that predicted a crash being a rear-end or not. Model 2 investigated the controller and vehicle characteristics that predict a rear-end crash-involved vehicle to be either the striking (at-fault) or struck (not-at-fault) vehicle. Model 1 indicated that rear-end crashes were overrepresented in urban areas and major cities and where speed limits exceeded 50 km/h. Model 2 indicated that occupants of struck vehicles (not at-fault) were more likely to be severely injured than the striking (at-fault) vehicles in rear-end crashes. License type and vehicle type also influenced the frequency and severity of rear-end crashes. Rear-end crashes can be unjust in that the not-at-fault party is typically more severely injured. Results from the current study suggest that keeping speed limits no higher than 50 km/h could help reduce the severity of rear-end crashes. Increased enforcement of safe following distances could also assist in preventing road trauma as a result of rear-end crashes.
Multi-focus thermal image fusion
Creators: name: Benes, Radek
name: Dvorak, Pavel
name: Faundez-Zanuy, Marcos
name: Espinosa-Duro, Virginia
name: Mekyska, Jiri
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper proposes a novel algorithm for multi-focus thermal image fusion. The algorithm is based on local activity analysis and advanced pre-selection of images into fusion process. The algorithm improves the object temperature measurement error up to 5 Celsius degrees. The proposed algorithm is evaluated by half total error rate, root mean squared error, cross correlation and visual inspection. To the best of our knowledge, this is the first work devoted to multi-focus thermal image fusion. For testing of proposed algorithm we acquire six thermal image set with objects at different focal depth.
description: 16 pages, published in Pattern Recognition Letters, Volume 34, Issue 5, 2013, Pages 536-544, ISSN 0167-8655
Why the Mittag-Leffler function can be considered the Queen function of the Fractional Calculus?
Creators: name: Mainardi, Francesco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 26A33, 33C10, 33E12, 34A25, 44A20 26A33, 33C10, 33E12, 34A25, 44A20 45K05, 60G18, 60G50, 60G52, 60K05, 76R50 K05, 60G18, 60G50, 60G52, 60K05, 76R50

description: In this survey we stress the importance of the higher transcendental Mittag-Leffler function in the framework of the Fractional Calculus. We first start with the analytical properties of the classical Mittag-Leffler function as derived from being the solution of the simplest fractional differential equation governing relaxation processes. Through the Sections of the text we plan to address the reader in this pathway towards the main applications of the Mittag-Leffler function that has induced us in the past to define it as the Queen Function of the Fractional Calculus. These applications concern some noteworthy stochastic processes and the time fractional diffusion-wave equation. We expect that in the next future this function will gain more credit in the science of complex systems. In Appendix A we sketch some historical aspects related to the author's acquaintance with this function. Finally, with respect to the published version in Entropy, we add Appendix B where we briefly refer to the numerical methods nowadays available to compute the functions of the Mittag-Leffler type.
description: 52 pages, 8 Figures
Η συμμετοχή τρίτων στη διαδικασία διεθνούς διαιτησίας:
Creators: name: Πασχούδη, Νικολέτα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Διεθνής διαιτησία
Συμμετοχή τρίτων
Πολυμερής διαιτησία
International arbitration
Third parties' participation
Multiparty arbitration

description: Σκοπός της παρούσας είναι η εξέταση ενός ιδιαίτερα ασαφούς και αμφισβητούμενου ζητήματος, ήτοι του κατά πόσο είναι δυνατή η συμμετοχή ενός τρίτου στη διαδικασία διεθνούς διαιτησίας. Αρχικά, γίνεται μία σύντομη αναφορά επί βασικών εννοιών της διαιτησίας και κατόπιν παρατίθενται οι περιπτώσεις που κάποιος κρίνεται ως τρίτος. Στη συνέχεια αναλύονται οι περιπτώσεις κατά τις οποίες οι τρίτοι δεσμεύονται από τη διαιτητική συμφωνία, παρόλο που κατ’ αρχήν δεσμεύονται από αυτήν αποκλειστικά τα μέρη που την υπέγραψαν. Περαιτέρω, παρουσιάζονται οι περιπτώσεις επέκτασης των αποτελεσμάτων της διαιτησίας σε τρίτους, και ειδικότερα όταν πραγματώνεται μέσω της διευρύνσεως των υποκειμενικών ορίων μιας συμφωνίας διαιτησίας είτε μέσω μιας πολυμερούς διαιτησίας. Τέλος, εξετάζεται και η συμμετοχή των τρίτων σε μία διεθνή διαιτησία, υπό τη μορφή ενός «διαδικαστικού» ρόλου και με στόχο τη διευκόλυνση της εξέλιξης της διαιτησίας.
description: This paper is primarily devoted to present the controversial issue of a third party’s possibility to participate in an international arbitration process. Primarily, there is a brief reference on the key concepts of arbitration and thereafter the cases that someone is considered to be a third party are laid out. Moreover, there is further analysis on the cases that a third party is bound by the arbitration agreement, despite the fact that only the signatory parties are initially bound to it. Furthermore, there is a reference on the cases of extending the results of arbitration to third parties and more specifically while it is being fulfilled either through the expansion of the subjective boundaries of an arbitration agreement or through a multiparty arbitration. Finally, the participation of third parties to an international arbitration is presented with the form of a “procedural” role that aims to facilitate the development of the arbitrational process.
How to constrain inflationary parameter space with minimal priors
Creators: name: Hamann, Jan
name: Lesgourgues, Julien
name: Valkenburg, Wessel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We update constraints on the Hubble function H(phi) during inflation, using the most recent cosmic microwave background (CMB) and large scale structure (LSS) data. Our main focus is on a comparison between various commonly used methods of calculating the primordial power spectrum via analytical approximations and the results obtained by integrating the exact equations numerically. In each case, we impose naive, minimally restrictive priors on the duration of inflation. We find that the choice of priors has an impact on the results: the bounds on inflationary parameters can vary by up to a factor two. Nevertheless, it should be noted that within the region allowed by the minimal prior of the exact method, the accuracy of the approximations is sufficient for current data. We caution however that a careless minimal implementation of the approximative methods allows models for which the assumptions behind the analytical approximations fail, and recommend using the exact numerical method for a self-consistent analysis of cosmological data.
description: 16 pages, 3 figures
Predictive modeling of submarining risk in car occupants based on pelvis angle and lap belt positioning
Creators: name: Takeuchi, Yuya
name: Tanaka, Yoshihiko
name: Azuma, Toshiharu
name: Zhao, Yuqing
name: Mizuno, Koji
name: Yamada, Minoru
name: Yokoyama, Yoichi
name: Yamada, Yoshitake
name: Jinzaki, Masahiro
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified

description: The engagement of the lap belt with the pelvis is critical for occupant safety during vehicle frontal crashes to prevent occupant submarining. This study aims to develop a predictive model for submarining risk based on anthropometric parameters and lap belt positioning using finite element (FE) analyses. FE analyses were conducted using human body models representing various body shapes (a 50th percentile male, low and high BMI males, and a 5th percentile female) in three seated postures (standard, reclined, and slouched). The lap belt-ASIS overlap and the belt-pelvis angle were used as key parameters for predicting submarining risk. A logistic regression analysis was utilized to correlate submarining occurrence with the initial values of these two parameters at the beginning of impact. Subsequently, this submarining prediction model was applied to computer tomography (CT) measurements of human subjects in different seated postures (upright, reclined, and slouched), and submarining risks were calculated based on the developed model. FE simulations indicated that submarining was more likely to occur as the initial belt-pelvis angle approached zero and there was a smaller initial belt-ASIS overlap. The logistic regression analysis demonstrated that the initial belt-pelvis angle and belt-ASIS overlap were statistically significant for predicting submarining risk. The derived model effectively distinguished submarining occurrence based on the initial values of these two parameters. The application of the submarining model to CT measurements of human subjects showed that submarining risk was lower in the order of upright, slouched, and reclined postures. In the reclined posture, the high submarining risk was attributed to a small belt-ASIS overlap and a rearward-tilted pelvis angle; whereas in the slouched posture, the risk was mostly associated with a rearward-tilted pelvis angle. The submarining prediction model was developed based on the belt-pelvis angle and the belt-ASIS overlap. This predictive model may help to design restraint systems for various body types and seated postures of occupants.
Ο ρόλος του παιδαγωγού: παραστάσεις στην αττική και κατωιταλιωτική αγγειογραφία (5ος και 4ος αι. π.Χ.)
Creators: name: Παπαϊωάννου, Ελένη Στέφανου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Παιδαγωγός
Αττική
Κατωιταλιωτική
Pedagogue
Attic
South Italian

description: Σκοπός της παρούσης εργασίας ήταν η μελέτη της εικονογραφίας του παιδαγωγού στην τέχνη της αττικής και κατωιταλιωτικής αγγειογραφίας του 5ου και 4ου αι.π.Χ. αντίστοιχα. Αρχικά εξετάστηκε ο όρος παιδαγωγός και ο ρόλος του στην καθημερινή ζωή μέσα από τις φιλολογικές πηγές. Έπειτα, επισημάνθηκε η σκηνική του παρουσία στην θεατρική παραγωγή του 5ου αι.π.Χ. Ειδικότερα, εξετάστηκε η παρουσία του παιδαγωγού στην ερυθρόμορφη αττική αγγειογραφία του 5ου αι.π.Χ., σε παραστάσεις που σχετίζονται κυρίως με την καθημερινή ζωή, αλλά και η παρουσία του στην ερυθρόμορφη αγγειογραφία της Μεγάλης Ελλάδας του 4ου αι.π.Χ., κυρίως μέσα από την παραγωγή του Απουλικού, Λευκανικού, Καμπανικού και Σικελικού εργαστηρίου σε παραστάσεις που σχετίζονται κυρίως με θεατρικές απεικονίσεις.
description: The aim of the present dissertation was the study of the pedagogue’s iconography in the art of attic and South Italian vase painting of the 5th and 4th century B.C. Firstly, was examined the term pedagogue and his role in the every day life through the philological resources. Then, was noted his scenic presence in the theatrical production of the 5th century B.C. Especially, was examined the presence of the pedagogue in the attic red vase painting of the 5th century B.C. through illustrations that deals with the every day life, as well as his presence in the red vase painting of the 4th century B.C. from Magna Grecia, through the production of Apulia, Lucania, Campania and Sicily that illustrate theatrical performances.
title: To throw a whole world in colour on a canvas though it be but a man’s fine face
title: colour in the plays of Sean O’Casey
titleType: Subtitle
Creators: name: Evans, Ryan
Publisher: name: Lancaster University
Year: 2019

description: This thesis examines the presence and use of colour in the plays of Sean O’Casey and argues that while a portion of colour in the drama is aesthetic, another portion is intentionally utilized as a means to provide additional contextual commentary, be it cultural, religious, political, or artistic in nature. This practice stems, I argue, in part because of O’Casey’s tendency towards an appreciation for beautiful things stemming from his artistic leanings. I also argue that the politics of his youth: associations with the Irish Citizen Army and the Labour Movement, his family’s poverty due to the early passing of his father Michael, his relationship with religion, and his desire to open the arts to the masses influenced how and why he wrote. I use as a support to these ideas Michael Pierse’s recent publication on Irish working-class writing history and the colour theories of Sabine Doran and Ulf Klaren and Karin Fridell Anter to analyse the texts of the plays as well as analysing productions of eight O’Casey plays. I come to the conclusion that O’Casey utilized colour as a means of enhancing the reality perceived within his plays to provide context on the various historical, political, and social movements addressed.
Some characterizations of $ρ$-Einstein solitons
Creators: name: Shaikh, Absos Ali
name: Cunha, Antonio W.
name: Mandal, Prosenjit
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this article we have showed that a gradient $ρ$-Einstein soliton with a vector field of bounded norm and satisfying some other conditions is isometric to the Euclidean sphere. Later, we have proved that a non-trivial complete gradient $ρ$-Einstein soliton with finite weighted Dirichlet integral and certain restriction on Ricci curvature must be of constant scalar curvature and steady Ricci flat. Finally, we have proved that a non-shrinking or non-expanding gradient traceless Ricci soliton possessing some conditions must be steady.
The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
Creators: name: Jackson, J. M.
name: Rathborne, J. M.
name: Shah, R. Y.
name: Simon, R.
name: Bania, T. M.
name: Clemens, D. P.
name: Chambers, E. T.
name: Johnson, A. M.
name: Dormody, M.
name: Lavoie, R.
name: Heyer, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey is a new survey of Galactic 13CO (1-0) emission. The survey used the SEQUOIA multi pixel array on the Five College Radio Astronomy Observatory 14 m telescope to cover a longitude range of l = 18 deg-55.7 deg and a latitude range of |b| < 1 deg, a total of 75.4 square degrees. Using both position-switching and On-The-Fly mapping modes, we achieved an angular sampling of 22 arcsec, better than half of the telescope's 46 arcsec angular resolution. The survey's velocity coverage is -5 to 135 km/s for Galactic longitudes l <= 40 deg and -5 to 85 km/s for Galactic longitudes l > 40 deg. At the velocity resolution of 0.21 km/s, the typical rms sensitivity is sigma(TA*)~0.13 K. The survey comprises a total of 1,993,522 spectra. We show integrated intensity images (zeroth moment maps), channel maps, position-velocity diagrams, and an average spectrum of the completed survey dataset. We also discuss the telescope and instrumental parameters, the observing modes, the data reduction processes, and the emission and noise characteristics of the dataset. The Galactic Ring Survey data are available to the community at www.bu.edu/galacticring or in DVD form by request.
description: Accepted ApJ. 21 pages (ApJ emulate style). 12 figures
Spherical Cap Studs: A novel speed bump alternative to reduce discomfort with effective speed reduction
Creators: name: Advani, Nainesh
name: Danak, Het
name: Dutta, Manish
name: Jena, Suprava
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: The aim of this study is to assess the potential of Spherical Cap Studs (SCS) as a substitute for conventional speed bumps, with a focus on limiting two wheeler speed while minimizing discomfort to riders by comparing the speed reduction capabilities and discomfort levels associated with SCS and speed bumps. The study uses experimental approach to compare the speed limiting ability and discomfort caused to rider by the proposed SCS and a standard speed bump. Speed profiles were developed for two wheelers passing over both SCS and speed bump. The parameter employed to compare speed profiles is the Mean Absolute Percentage Difference (MAPD), offering valuable insights into how effectively the two traffic calming measures reduce two wheeler speeds. To compare discomfort, the study calculates the ‘Vibration Dose Value’ (VDV) experienced by riders when traversing both speed bump and SCS. Additionally, ‘Static Compressive Stress’ (Se) applied to the spinal cord is also calculated in both scenarios. The analysis of speed profiles reveals an MAPD value of 13.70% indicating that SCS exhibits speed reduction capabilities comparable to traditional speed bump. In terms of discomfort, the VDV for two wheelers passing over a speed bump is measured at 5.92 m/s1.75, whereas the VDV for SCS is found to be 5.16 m/s1.75. Similarly, the Static Compressive Stress (Se) experienced at a speed bump is 0.60 MPa, in contrast to the 0.33 MPa recorded for SCS. This data underscores a noteworthy 12.8% reduction in VDV and a substantial 45.57% reduction in Se. The study’s findings support the potential adoption of SCS as an effective alternative to conventional speed bumps for controlling two wheeler speeds. SCS demonstrate a speed reduction capability similar to that of traditional speed bumps while significantly alleviating discomfort for riders. SCS is expected to be a promising solution for traffic calming purposes in various settings, such as markets, residential areas, institutional campuses, and parking lots.
Cosmography in $f(Q)$ gravity
Creators: name: Mandal, Sanjay
name: Wang, Deng
name: Sahoo, P. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Cosmography is an ideal tool to investigate the cosmic expansion history of the Universe in a model-independent way. The equations of motion in modified theories of gravity are usually very complicated; cosmography may select practical models without imposing arbitrary choices a priori. We use the model-independent way to derive $f(z)$ and its derivatives up to fourth order in terms of measurable cosmographic parameters. We then fit those functions into the luminosity distance directly. We perform the MCMC analysis by considering three different sets of cosmographic functions. Using the largest supernovae Ia Pantheon sample, we derive the constraints on the Hubble constant $H_0$ and the cosmographic functions, and find that the former two terms in Taylor expansion of luminosity distance work dominantly in $f(Q)$ gravity.
description: Revision submitted to PRD
Special Solutions of the Bohr Hamiltonian Related to Shape Phase Transitions in Nuclei
Creators: name: Bonatsos, Dennis
name: Lenis, D.
name: Petrellis, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Nuclei exhibit quantum phase transitions (earlier called ground state phase transitions) between different shapes as the number of nucleons is modified, resulting in changes in the ground and low lying nuclear states. Special solutions of the Bohr Hamiltonian appropriate for the critical point of such shape phase transitions, as well as other special solutions applicable to relevant nuclear regions are described.
description: 17 pages, LaTeX. To be published in a special issue of the Romanian Reports in Physics devoted to Dorin Poenaru's 70th Anniversary
Algorithmic aspects of constrained unit disk graphs
Creators: name: Breu, Heinz
Publisher: name: University of British Columbia
Year: 2009

description: Computational problems on graphs often arise in two- or three-dimensional geometric contexts. Such problems include assigning channels to radio transmitters (graph colouring), physically routing traces on a printed circuit board (graph drawing), and modelling molecules. It is reasonable to expect that natural graph problems have more efficient solutions when restricted to such geometric graphs. Unfortunately, many familiar NPcomplete problems remain NP-complete on geometric graphs. Indifference graphs arise in a one-dimensional geometric context; they are the intersection graphs of unit intervals on the line. Many NP-complete problems on arbitrary graphs do have efficient solutions on indifference graphs. Yet these same problems remain NP-complete for the intersection graphs of unit disks in the plane (unit disk graphs), a natural two-dimensional generalization of indifference graphs. What accounts for this situation, and how can algorithms be designed to deal with it? To study these issues, this thesis identifies a range of subclasses of unit disk graphs in which the second spatial dimension is gradually, introduced. More specifically, τ-strip graphs "interpolate" between unit disk graphs and indifference graphs; they are the intersection graphs of unit-diameter disks whose centres are constrained to lie in a strip of thickness τ. This thesis studies algorithmic and structural aspects of varying the value τ for τ-strip graphs. The thesis takes significant steps towards characterizing, recognizing, and laying out strip graphs. We will also see how to develop algorithms for several problems on strip graphs, and how to exploit their geometric representation. In particular, we will see that problems become especially tractable when the strips are "thin" (τ is small) or "discrete" (the number of possible y-coordinates for the disks is small). Note again that indifference graphs are the thinnest (τ = 0) and most discrete (one y-coordinate) of the nontrivial τ-strip graphs. The immediate results of this research concern algorithms for a specific class of graphs. The real contribution of this research is the elucidation of when and where geometry can be exploited in the development of efficient graph theoretic algorithms.
Lightest U-parity Particle (LUP) dark matter
Creators: name: Lee, Hye-Sung
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We suggest a U(1)' gauge symmetry as an alternative to the usual R-parity of supersymmetric standard models, showing that it can also work as a common source of stabilities of proton and dark matter in addition to other attractive features. The residual discrete symmetries of a single U(1)' can provide stabilities to both the MSSM sector (proton) and the hidden sector (new dark matter candidate, LUP). The LUP can expand the viability of many models such as R-parity violating models and gauge mediation models regarding dark matter issue.
description: Version to appear in PLB
The chemical content of nearby galaxies from planetary nebulae: NGC 147
Creators: name: Goncalves, D. R.
name: Magrini, L.
name: Leisy, P.
name: Corradi, R. M. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the results of spectroscopic observations, obtained with the GEMINI Multi-Object Spectrograph, of 8 planetary nebulae (PNe) in the dwarf spheroidal (dSph) galaxy NGC147, a companion of M31. The physico-chemical properties of the six brightest PNe (Corradi et al. 2005) were derived using both the empirical ICF method and photoionization modelling with CLOUDY. Different aspects of the evolution of low and intermediate mass stars in a low-metallicity environment are analysed using relationships between chemical abundances. In addition, certain features of the chemical evolution of NGC147 were examined. In particular, the mean metallicity of PNe, O/H=8.06 (corresponding to [Fe/H](PNe)~-0.97), is close to the metallicity of the old stellar population, [Fe/H]=-1.0 (Butler & Martinez-Delgado), suggesting a negligible chemical enrichment during a substantial amount of time. Finally, the luminosity-metallicity relationship for the dwarf galaxies of the Local Group is discussed. The location in the luminosity-metallicity diagram of dSphs does not exclude their formation from old dwarf irregular (dIrs) galaxies, but it does exclude their formation from the present time dIrs, since the differences between their metallicities are already present in their older populations. The offset in the luminosity-metallicity relationship indicates a faster enrichment of dSphs, and together with the different average abundance ratio [O/Fe] demonstrates the different star formation histories for these two types of galaxies.
description: MNRAS accepted. 12 pages including 6 figures and 5 tables. Also available at http://www.astro.iag.usp.br/~denise/
Werkzeuge zur Kommunikation, Kollaboration und Arbeitsorganisation in Text+
Creators: name: Buddenbohm, Stefan
name: Weimer, Lukas
name: Wienert, Annika
Publisher: name: Zenodo
Year: 2022
Subjects: NFDI
Text+
Textplus
Infrastructure Operations
Infrastruktur Betrieb
Text+ Plenary 22
IO

description: Welche Werkzeuge nutzt Text+ zur Kommunikation, Kollaboration und Arbeitsorganisation? Auf dem Poster werden die wichtigsten Werkzeuge und Dienste dargestellt, die das NFDI-Konsortium Text+ nutzt (Stand: September 2022). Die Werkzeuge und Dienste decken ein breites Spektrum ab und können generell für Projektvorhaben als Inspiration für das Onboarding genutzt werden. Die Bereitstellung für Text+ erfolgt, wo immer möglich, durch die Gesellschaft für wissenschaftliche Datenverarbeitung Göttingen mbH (GWDG), dem Rechenzentrum der Universität Göttingen und der Max-Planck-Gesellschaft. Dadurch sind für Text+ sicheres Hosting in vertrauenswürdiger Umgebung, skalierende Benutzung und User Support sichergestellt. Innerhalb von Text+ erfolgt die Bereitstellung und Betreuung durch die Task Area Infrastructure/Operations. Poster presented at the plenary meeting of the NFDI consortium Text+ on September 12, 2022 in Mannheim, Germany.
description: Text+ receives a funding grant from the DFG under the grant agreement number 460033370. Text+ is contributing to the NFDI, the National Research Data Infrastructure (NFDI).
DE CVn: A bright, eclipsing red dwarf - white dwarf binary
Creators: name: Besselaar, E. J. M. van den
name: Greimel, R.
name: Morales-Rueda, L.
name: Nelemans, G.
name: Thorstensen, J. R.
name: Marsh, T. R.
name: Dhillon, V. S.
name: Robb, R. M.
name: Balam, D. D.
name: Guenther, E. W.
name: Kemp, J.
name: Augusteijn, T.
name: Groot, P. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Close white dwarf - red dwarf binaries must have gone through a common-envelope phase during their evolution. DE CVn is a detached white dwarf - red dwarf binary with a relatively short (~8.7 hours) orbital period. Its brightness and the presence of eclipses makes this system ideal for a more detailed study. From a study of photometric and spectroscopic observations of DE CVn we derive the system parameters which we discuss in the frame work of common-envelope evolution. Photometric observations of the eclipses are used to determine an accurate ephemeris. From a model fit to an average low-resolution spectrum of DE CVn we constrain the temperature of the white dwarf and the spectral type of the red dwarf. The eclipse light curve is analysed and combined with the radial velocity curve of the red dwarf determined from time-resolved spectroscopy to derive constraints on the inclination and the masses of the components in the system. The derived ephemeris is HJD_min = 2452784.5533(1) + 0.3641394(2) x E. The red dwarf in DE CVn has a spectral type of M3V and the white dwarf has an effective temperature of 8000 K. The inclination of the system is 86 (+3, -2) deg and the mass and radius of the red dwarf are 0.41 +/- 0.06 M_sun and 0.37 (+0.06, -0.007) R_sun, respectively, and the mass and radius of the white dwarf are 0.51 (+0.06, -0.02) M_sun and 0.0136 (+0.0008, -0.0002) R_sun, respectively. We found that the white dwarf has a hydrogen-rich atmosphere (DA-type). Given that DE CVn has experienced a common-envelope phase, we can reconstruct its evolution and we find that the progenitor of the white dwarf was a relatively low-mass star (M <= 1.6M_sun). The current age of this system is 3.3-7.3 x 10^9 years, while it will take longer than the Hubble time for DE CVn to evolve into a semi-detached system.
description: 12 pages, 9 figures, 6 tables. Accepted for publication in A&A
Sign reversal in magnetic field amplification by relativistic laser-driven microtube implosions
Creators: name: Weichman, K.
name: Murakami, M.
name: Robinson, A. P. L.
name: Arefiev, A. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We demonstrate and explain the surprising phenomenon of sign reversal in magnetic field amplification by the laser-driven implosion of a structured target. Relativistically intense laser pulses incident on the outer surface of a microtube target consisting of thin opaque shell surrounding a $μ$m-scale cylindrical void drive an initial ion implosion and later explosion capable of generating and subsequently amplifying strong magnetic fields. While the magnetic field generation is enhanced and spatially smoothed by the application of a kilotesla-level seed field, the sign of the generated field does not always follow the sign of the seed field. One unexpected consequence of the amplification process is a reversal in the sign of the amplified magnetic field when, for example, the target outer cross section is changed from square to circular. Using 2D particle-in-cell simulations, we demonstrate that sign reversal is linked to the stability of the surface magnetic field of opposite sign from the seed which arises at the target inner surface during laser irradiation. The stability of the surface magnetic field and consequently the sign of the final amplified field depends sensitively on the target, laser, and seed magnetic field conditions, which could be leveraged to make laser-driven microtube implosions an attractive platform for the study of magnetic fields in high energy density plasma in regimes where sign reversal either is or is not desired.
Multiwavelength Imaging and Spectral Analysis of Jet-like Phenomena in a Solar Active Region Using IRIS and AIA
Creators: name: Humphries, Llŷr Dafydd
name: Verwichte, Erwin
name: Kuridze, David
name: Morgan, Huw
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: High-resolution observations of dynamic phenomena give insight into properties and processes that govern the low solar atmosphere. We present the analysis of jet-like phenomena emanating from a penumbral foot-point in active region (AR) 12192 using imaging and spectral observations from the Interface Region Imaging Spectrograph (IRIS) and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory. These jets are associated with line-of-sight (LoS) Doppler speeds of $\pm$ 10-22 km s$^{-1}$ and bright fronts which seem to move across the Plane-of-Sky (PoS) at speeds of 23-130 km s$^{-1}$. Such speeds are considerably higher than the expected sound speed in the chromosphere. The jets have signatures which are visible both in the cool and hot channels of IRIS and AIA. Each jet lasts on average 15 minutes and occur 5-7 times over a period of 2 hours. Possible mechanisms to explain this phenomenon are suggested, the most likely of which involve p-mode or Alfv\' en wave shock trains impinging on the transition region (TR) and corona as a result of steepening photospheric wavefronts or gravity waves.
description: 17 pages, 9 figures, 2 tables
Concentration-Temperature Superposition of Helix Folding Rates in Gelatin
Creators: name: Gornall, J. L.
name: Terentjev, E. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the kinetics of helix-coil transition in water solutions of gelatin (collagen protein) by optical rotation techniques combined with thermal characterization. By examining the rates of secondary helix folding, and covering a very wide range of solution concentrations, we are able to identify a universal exponential dependence of folding rate on concentration and quench temperature. We demonstrate a new concentration-temperature superposition of data at all temperatures and concentrations, and build the corresponding master curve. The results support the concept of a diffuse helix-coil transition. We find no concentration dependance of the normalized rate constant, suggesting first order (single) kinetics of secondary helix folding dominate in the early stages of renaturation.
description: 6 figures
Response time of mixed platoons with traditional and autonomous vehicles in field trials: impact assessment on flow stability and safety
Creators: name: Das, Tanmay
name: Ahmed, Ishtiak
name: Williams, Billy M.
name: Rouphail, Nagui M.
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mental Health

description: This study investigates the response times of autonomous vehicles (AVs) equipped with adaptive cruise control (ACC) and traditional human-driven vehicles (TVs) in mixed traffic scenarios. The primary objective is to assess how these response times impact the stability and safety of mixed traffic flow, considering the growing prevalence of ACC technology in vehicles worldwide. Utilising a trajectory dataset from OpenACC totalling 3389.70 s, this research introduces a response time estimation framework that combines cross-correlation and partial autocorrelation techniques. The study calibrates Gazis, Herman, and Rothery's (GHR) car-following model to evaluate mixed traffic flow stability and employs a modified time-to-collision (MTTC) surrogate for safety analysis. The study also delves into the influence of vehicle manufacturer diversity on study outcomes. Key findings reveal that the AVs exhibit significantly longer response times, ranging from 1.10–3.20 s, compared to the 0.30–1.90-second range of traditional vehicles (p value < 0.005). These extended response times in AVs contribute to prolonged traffic flow instability and increased traffic conflicts. Moreover, the type of lead vehicle does not significantly affect the response times of either AVs or TVs (p value > 0.005). The study also highlights that vehicle manufacturer diversity does not substantially affect these response times. Additionally, the examination of fitted GHR parameters underscores AVs’ heightened sensitivity to spacing and relative speed, providing insights into AV dynamics in the presence of mixed traffic.
DRT-based modelling framework for Li-ion cells
Creators: name: Iurilli, Pietro
name: Brivio, Claudio
name: Carrillo, Rafael E.
name: Wood, Vanessa
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The correct assessment of battery states is essential to maximize battery pack performances while ensuring reliable and safe operation. This work introduces EIS2MOD, a novel modelling framework for Li-ion cells based on Distribution of Relaxation Time (DRT). A physically based Electric Circuit Model (ECM) is developed starting from Electrochemical Impedance Spectroscopy (EIS) and Open Circuit Voltage (OCV) measurements. DRT is applied to deconvolve the electrochemical phenomena from the EIS. The presented methodology is based on: i) DRT calculation from EIS, ii) DRT analysis for ECM configuration and iii) Model parameters extraction and fitting. The proposed framework is applied to large format Li-ion pouch cells, which are tested over the whole State of Charge (SoC) range and a wide temperature range (-10°C to 35°C). Different current profiles have been tested to validate the model, showing its high accuracy in reproducing the battery cell behavior (e.g. RMSE on the battery terminals voltage lower than 1.50% for driving cycle simulations at variable temperature and SoC). An additional advantage of EIS2MOD is its light computational load thus offering an attractive framework for battery management system implementation.
description: 11 pages, 10 figures
Uniform Birkhoff
Creators: name: Gehrke, Mai
name: Pinsker, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic (math.LO)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: We show that pseudovarieties of finitely generated algebras, i.e., classes $C$ of finitely generated algebras closed under finite products, homomorphic images, and subalgebras, can be described via a uniform structure $U$ on the free algebra for $C$: the members of $C$ then are precisely those finitely generated algebras $A$ for which the natural mapping from the free algebra onto the term clone of $A$ is well-defined and uniformly continuous with respect to the uniformity $U$ and the uniformity of pointwise convergence on the term clone of $A$, respectively. Our result unifies earlier theorems describing pseudovarieties of finite algebras and the pseudovariety generated by a single oligomorphic algebra.
description: 10 pages. (This material contains old results from 2014 published in 2018 (see reference), but so far not on arXiv)
Quantum Capacities of Bosonic Channels
Creators: name: Wolf, Michael M.
name: Perez-Garcia, David
name: Giedke, Geza
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the capacity of bosonic quantum channels for the transmission of quantum information. Achievable rates are determined from measurable moments of the channel by showing that every channel can asymptotically simulate a Gaussian channel which is characterized by second moments of the initial channel. We calculate the quantum capacity for a class of Gaussian channels, including channels describing optical fibers with photon losses, by proving that Gaussian encodings are optimal. Along the way we provide a complete characterization of degradable Gaussian channels and those arising from teleportation protocols.
description: 5 pages, 2 figures
Renormalisation group evolution for the $ΔS = 1$ effective Hamiltonian with $N_f=2+1$
Creators: name: Adams, David H.
name: Lee, Weonjong
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the renormalisation group (RG) evolution for the $ΔS = 1$ operators in unquenched QCD with $N_f = 3$ ($m_u=m_d=m_s$) or, more generally, $N_f = 2+1$ ($m_u=m_d \ne m_s$) flavors. In particular, we focus on the specific problem of how to treat the singularities which show up only for $N_f=3$ or $N_f = 2+1$ in the original solution of Buras {\it et al.} for the RG evolution matrix at next-to-leading order. On top of Buras {\it et al.}'s original treatment, we use a new method of analytic continuation to obtain the correct solution in this case. It is free of singularities and can therefore be used in numerical analysis of data sets calculated in lattice QCD.
description: 7 pages, minor revisions, to appear in PRD
Smart dual responsive alginate grafted copolymeric hydrogel for sorption of recalcitrant methylene green from water
Creators: name: Subhan, Hanif
name: Alam, Sultan
name: Uzma
name: Ullah, Mohib
name: Shah, Luqman Ali
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology
subject: FOS: Biological sciences

description: The sorptive removal of recalcitrant dyes from aquatic media holds paramount significance in the contemporary research. The pressing problem has been addressed by facile fabrication and subsequent sorption studies on sodium alginate grafted poly (N-isopropyl acrylamide-co-acrylic acid) [Na-Alg-g-p(NIPAm-co-AAc)] hydrogel for sorption of methylene green (MG). The sorbent achieved equilibrium in 30 minutes, whereas highest sorption capacity was noted at optimum pH 5. At 25°C, the sorbed quantity of the adsorbate enhanced with the rise in initial concentration. The data of isothermal studies fitted well into the Langmuir isotherm as suggested by relatively higher R2 of ≈ 0.98. The sorption obeyed pseudo-second-order kinetics as evidenced by exceptionally higher R2 (0.999) and substantial agreement in experimentally obtained and theoretically calculated second-order rate constant. The validity of Langmuir isotherm and pseudo-second-order kinetic models imply the occurrence of chemisorption between anionic [Na-Alg-g-p(NIPAm-co-AAc)] sorbent and cationic MG. Moreover, the material exhibits dual (pH and temperature) responsive nature because the amount sorbed undergoes variation with change in temperature and pH. The results signify potential candidature of the fabricated sorbent for the reclamation of dye contaminated water and related applications.
On the boundary conditions for the 1D Weyl-Majorana particle in a box
Creators: name: De Vincenzo, Salvatore
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In (1+1) space-time dimensions, we can have two particles that are Weyl and Majorana particles at the same time---1D Weyl-Majorana particles. That is, the right-chiral and left-chiral parts of the two-component Dirac wave function that satisfies the Majorana condition, in the Weyl representation, describe these particles, and each satisfies their own Majorana condition. Naturally, the nonzero component of each of these two two-component wave functions satisfies a Weyl equation. We investigate and discuss this issue and demonstrate that for a 1D Weyl-Majorana particle in a box, the nonzero components, and therefore the chiral wave functions, only admit the periodic and antiperiodic boundary conditions. From the latter two boundary conditions, we can only construct four boundary conditions for the entire Dirac wave function. Then, we demonstrate that these four boundary conditions are also included within the most general set of self-adjoint boundary conditions for a 1D Majorana particle in a box.
description: 12 pages. To be published in Acta Physica Polonica B
An Ultraluminous Supersoft X-ray Source in M81: An Intermediate-Mass Black Hole?
Creators: name: Liu, Jifeng
name: Di Stefano, Rosanne
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ultraluminous supersoft X-ray sources (ULSSS) exhibit supersoft spectra with blackbody temperatures of 50-100 eV and bolometric luminosities above $10^{39}$ erg s$^{-1}$, and are possibly intermediate mass black holes (IMBHs) of $\ge10^3 M_\odot$ or massive white dwarfs that are progenitors of type Ia supernovae. In this letter we report our optical studies of such a source in M81, M81-ULS1, with HST archive observations. M81-ULS1 is identified with a point-like object, the spectral energy distribution of which reveals a blue component in addition to the companion of an AGB star. The blue component is consistent with the power-law as expected from the geometrically-thin accretion disk around an IMBH accretor, but inconsistent with the power-law as expected from the X-ray irradiated flared accretion disk around a white dwarf accretor. This result is strong evidence that M81-ULS1 is an IMBH instead of a white dwarf.
description: 12 pages, 1 table, 3 figures
Kinematics and Multi Band Period-Luminosity-Metallicity Relation of RR Lyrae Stars via Statistical Parallax
Creators: name: Muhie, T. D.
name: Dambis, A. K.
name: Berdnikov, L. N.
name: Kniazev, A. Y.
name: Grebel, Eva K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper presents results from photometric and statistical-parallax analysis of a sample of 850 field RR Lyrae (RRL) variables. The photometric and spectroscopic data for sample RRLs are obtained from (1) our new spectroscopic observations (for 448 RRLs) carried out with the Southern African Large Telescope (SALT); (2) our photometric observations using the 1.0-m telescope of the South African Astronomical Observatory (SAAO), and (3) literature. These are combined with accurate proper motion data from the second release of \textit{Gaia} mission (DR2). This study primarily determines the velocity distribution of solar neighborhood RRLs, and it also calibrates the zero points of the RRLs visual V-band luminosity-metallicity (LZ or $M_V-$[\text{Fe/H}]) relation and their period-luminosity-metallicity (PLZ) relations in the \textit{WISE} $W_1-$ and \textit{2MASS} $Ks-$band. The calibrated PLZ and LZ relations are used to estimate the Galactic Center distance and the distance modulus of the Large Magellanic Cloud (LMC), which are found to be 7.99$\pm$0.49\,kpc and 18.46$\pm$0.09 \,mag, respectively. All our results are in excellent agreement with available literature based on statistical parallax analysis, but are considerably more accurate and precise. Moreover, the zero-points of our calibrated PLZ and LZ relations are quite consistent with current results found by other techniques and yield the LMC distance modulus that is within 0.04\,mag of the current most precise estimate.
description: 20 pages,21 figueres
De la aporofobia a la aporofilia en América Latina
Creators: name: Suing, Abel
Publisher: name: Zenodo
Year: 2019
Subjects: Comunicación
desarrollo
economía
pobreza
aporofobia
América Latina
Latinoaméica

description: Participación como editorialista en el informativo de la mañana, de 6:30 a 8:00, de Radio Loja, 97.7, que se emite desde la ciudad de Loja en Ecuador.