cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Updated universal relations for tidal deformabilities of neutron stars from phenomenological equations of state
Creators: name: Godzieba, Daniel A.
name: Gamba, Rossella
name: Radice, David
name: Bernuzzi, Sebastiano
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Equation of state (EOS) insensitive relations, so-called universal relations, between the neutron star (NS) compactness, its multipolar tidal deformability coefficients, and between the tidal parameters for binary systems are essential to break degeneracies in gravitational wave data analysis. Here, we validate and recalibrate these universal relations using a large set of almost 2 million phenomenological EOSs that are consistent with current observations. In doing so, we extend universal relations to a larger region of the EOS parameter space, most notably to softer EOSs and larger compactnesses. We show that waveform models that neglect higher-than-leading-order tidal deformations of the NSs accumulate as much as $3.5$ radians of dephasing from $20\,{\rm Hz}$ to merger. We also perform a full Bayesian parameter estimation of the GW170817 data, and we compare the NS radius constraints produced using universal relations from the literature and the updated fits we propose here. We find that the new fits yield a NS radius that is smaller by about 500 meters. This difference is less than the statistical uncertainty on the radius at the signal-to-noise-ratio of GW170817, but it is significantly larger than the precision anticipated for next-generation detectors.
description: 11 pages, 18 figures
Greive, Wolfgang: Rechtfertigung in den Kontexten der Welt
Creators: name: Dahling-Sander, Christoph
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 52 Nr. 1 (2003): Ökumenische Rundschau, Band 52, Heft 1
Variational Inference for Large Bayesian Vector Autoregressions
Creators: name: Bernardi, Mauro
name: Bianchi, Daniele
name: Bianco, Nicolas
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: We propose a novel variational Bayes approach to estimate high-dimensional Vector Autoregressive (VAR) models with hierarchical shrinkage priors. Our approach does not rely on a conventional structural representation of the parameter space for posterior inference. Instead, we elicit hierarchical shrinkage priors directly on the matrix of regression coefficients so that (a) the prior structure maps into posterior inference on the reduced-form transition matrix and (b) posterior estimates are more robust to variables permutation. An extensive simulation study provides evidence that our approach compares favorably against existing linear and nonlinear Markov chain Monte Carlo and variational Bayes methods. We investigate the statistical and economic value of the forecasts from our variational inference approach for a mean-variance investor allocating her wealth to different industry portfolios. The results show that more accurate estimates translate into substantial out-of-sample gains across hierarchical shrinkage priors and model dimensions.
Tachyonic Dirac Equation Revisited
Creators: name: Nanni, Luca
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In this paper, we revisit the two theoretical approaches for the formulation of the tachyonic Dirac equation. The first approach works within the theory of restricted relativity, starting from a Lorentz invariant Lagrangian consistent with a spacelike four-momentum. The second approach uses the theory of relativity extended to superluminal motions and works directly on the ordinary Dirac equation through superluminal Lorentz transformations. The equations resulting from the two approaches show mostly different, if not opposite, properties. In particular, the first equation violates the invariance under the action of the parity and charge conjugation operations. Although it is a good mathematical tool to describe the dynamics of a space-like particle, it also shows that the mean particle velocity is subluminal. In contrast, the second equation is invariant under the action of parity and charge conjugation symmetries, but the particle it describes is consistent with the classical dynamics of a tachyon. This study shows that it is not possible with the currently available theories to formulate a covariant equation that coherently describes the neutrino in the framework of the physics of tachyons, and depending on the experiment, one equation rather than the other should be used.
description: 14 pages
Variational inference for large Bayesian vector autoregressions*
Creators: name: Bernardi, Mauro
name: Bianchi, Daniele
name: Bianco, Nicolas
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: We propose a novel variational Bayes approach to estimate high-dimensional Vector Autoregressive (VAR) models with hierarchical shrinkage priors. Our approach does not rely on a conventional structural representation of the parameter space for posterior inference. Instead, we elicit hierarchical shrinkage priors directly on the matrix of regression coefficients so that (1) the prior structure maps into posterior inference on the reduced-form transition matrix and (2) posterior estimates are more robust to variables permutation. An extensive simulation study provides evidence that our approach compares favourably against existing linear and non-linear Markov Chain Monte Carlo and variational Bayes methods. We investigate the statistical and economic value of the forecasts from our variational inference approach for a mean-variance investor allocating her wealth to different industry portfolios. The results show that more accurate estimates translate into substantial out-of-sample gains across hierarchical shrinkage priors and model dimensions.
Artmaking materials in the classroom during the depression era and World War II years as revealed in some art education texts for teachers
Creators: name: Stephenson, D. Wendy Bullen
Publisher: name: University of British Columbia
Year: 2009

description: Using text analysis of art education texts for teachers, this study examines information on and attitudes to artmaking materials in the classroom during the Depression era and World War II years. This research was motivated by an interest in the extent to which recyclable materials or found or discarded materials were used in art programs during this 15 year period (1930 to 1945) when reduced budgets or material shortages threatened school art supplies or even art programs themselves. Fifteen art education texts are analyzed in the context of prevailing art curriculum models that existed as a result of changing social conditions. In this study these curriculum models are defined as Art for Industry, Creative Self Expression, Art for Daily Living, Art for Subject Integration, Art for School Art's Sake, Art for Art's Sake, and Art for Social Uses. This study documents the kinds of materials used and the types of art projects undertaken in classrooms during this time period. Questions addressed in the study relate to the basis of selection of materials and reasons why certain materials were chosen over others, economic assumptions of authors, information on scarcity of artmaking materials and reasons for or goals in using any recyclable materials, and sources of traditional and nontraditional materials. Other aspects of artmaking materials considered include attitudes to safety regarding the use of certain materials, the effect of subject integration on artmaking materials, and gender associations with materials. The study finds that some alternate artmaking materials were used in the art programs described in most of the texts but that the authors did not necessarily acknowledge use of such materials as a coping strategy. The attitudes in the texts range from no concern about adequate art materials to positing resourcefulness as one of the goals of the art program— resourcefulness in finding alternate artmaking materials in nature, the home, or the community.
Μελέτη κυκλώματος 4ης τάξης:
Creators: name: Παπαδημητρίου, Μαρία Ζήση
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Διαγράμματα διακλάδωσης
Φασικά διαγράμματα
Διάσταση Lyapunov
Προβολή Poincare
Εκθέτες Lyapunov
Bifurcation diagrams
Lyapunov exponents
Poincare's projection
Phase portraits
Dimension Lyapunov

description: In this project, we are working with the non-linear electrical 4th order Chua’s circuit. There is an external sine voltage affecting it, it’s a driven circuit.In order to study it, we use computational programs. The parameters for the non-linear resistor are:Ga=-0,2 mS, Gb=5,0 mS, Bp=0,80 VoltsWe are taking bifurcations diagrams for six different values of voltage:V0=0,5 Volt, V0=0,75 Volt, V0=1,0 Volt, V0=1,25 Volt, V0=1,50 Volt and V0=1,75 Volt.Bifurcation diagrams shows the periodical trajectories of the circuit for the different ranges.Furthermore we are taking the exponents Lyapunov, Poincare’s projections and phase portraits for the characterization of non-periodical trajectories.Finally for the first two bifurcation diagrams, we’ve chosen a „dark“ frequancy range of 200 Hz and with a step of 6 Hz or 3 Hz we are ta-king the exponents Lyapunov diagrams, so that the unknown trajectory can be named.
description: Στην εργασία αυτή εργαζόμαστε με το μη-γραμμικό ηλεκτρικό κύκλωμα Chua τέταρτης τάξης. Το κύκλωμα μας είναι μη-αυτόνομο (driven), δηλαδή μελετάται υπό την επίδραση γεννήτριας ημιτονοειδούς τάσης που συνδέεται εξωτερικά και επηρεάζει το κύκλωμα.Εμείς στην εργασία αυτή θα μελετήσουμε το κύκλωμα υπολογιστικά. Δηλαδή για σταθερές τιμές του μη-γραμμικού αντιστάτη, που είναι οι εξής:Ga=-0,2 mS, Gb=5,0 mS, Bp=0,80 VoltsΣχεδιάζουμε το διάγραμμα διακλάδωσης για έξι διαφορετικές τιμές του πλάτους της ημιτονικής τάσης εισόδου του κυκλώματος, που είναι οι εξής:V0=0,5 Volt, V0=0,75 Volt, V0=1,0 Volt, V0=1,25 Volt, V0=1,50 Volt και V0=1,75 Volt.Από τα διαγράμματα διακλάδωσης παίρνουμε πληροφορίες για την ύ-παρξη περιοδικών τροχιών του κυκλώματος στις διάφορες περιοχές συχνοτή-των. Για την περαιτέρω διερεύνηση των μη-περιοδικών τροχιών, λαμβάνουμε τα διαγράμματα με τους εκθέτες Lyapunov, τα διαγράμματα της προβολής poincare και τα φασικά πορτραίτα.Επίσης για τα δύο πρώτα διαγράμματα διακλάδωσης έχουμε επιλέξει μια «σκοτεινή» περιοχή συχνοτήτων εύρους 200 Hz για το κάθε ένα, για την οποία με βήμα 6 Hz ή 3 Ηz παίρνουμε το διάγραμμα των εκθετών Lyapunov, έτσι ώστε να ερευνήσουμε καλύτερα την συμπεριφορά της τροχιάς μας.
Photometric analysis of three totally eclipsing W UMa stars with increasing periods: TYC 3700-1384-1, V1511 Her and V1179 Her
Creators: name: Broens, Eric
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The first multi-colour light curve models and period studies for the totally eclipsing W UMa stars TYC 3700-1384-1, V1511 Her and V1179 Her are presented. All three stars are A-subtype W UMa stars of spectral type F. The light curve solutions show that TYC 3700-1384-1 has a moderately low mass ratio of q = 0.182 +/- 0.001 and a degree of overcontact of f = 49%. For V1179 Her a mass ratio q = 0.153 +/- 0.001 and a degree of overcontact of f = 48% is derived. The solution for V1511 Her is inconclusive, however the mass ratio is expected to be between 0.13 < q < 0.15. The evolutionary status is compared with zero-age main sequence stars taking into account energy transfer from the primary to the secondary component. The primary component of TYC 3700-1384-1 fits well in the main-sequence, while V1179 Her is more evolved. The period study reveals for all three stars a continuously increasing period at a rate of dP/dt = 6.1x10-7 d/yr, dP/dt = 5.0x10-7 d/yr and dP/dt = 9.6x10-7 d/yr for TYC 3700-1384-1, V1511 Her and V1179 Her respectively. The estimated mass transfer rates derived from these period changes are 1.6x10-7 solMass/yr for TYC 3700-1384-1 and 1.9x10-7 solMass/yr for V1179 Her.
description: 14 pages, 15 figures. This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review
Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, December 13, 1943
Creators: name: Trustees Of The Winfield And Okanagan Centre Irrigation District
Publisher: name: The University of British Columbia
Year: 2017

description: Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, dated December 13, 1943, regarding the brief that was to be presented to the Public Utilities Commission.
Generation of maximally entangled mixed states of two atoms via on-resonance asymmetric atom-cavity couplings
Creators: name: Li, Shang-Bin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A scheme for generating the maximally entangled mixed state of two atoms on-resonance asymmetrically coupled to a single mode optical cavity field is presented. The part frontier of both maximally entangled mixed states and maximal Bell violating mixed states can be approximately reached by the evolving reduced density matrix of two atoms if the ratio of coupling strengths of two atoms is appropriately controlled. It is also shown that exchange symmetry of global maximal concurrence is broken if and only if coupling strength ratio lies between $\frac{\sqrt{3}}{3}$ and $\sqrt{3}$ for the case of one-particle excitation and asymmetric coupling, while this partial symmetry-breaking can not be verified by detecting maximal Bell violation.
description: 5 pages, 5 figures
Εκπαιδευτικά και συνεργατικά ηλεκτρονικά παιχνίδια: θεωρητική προσέγγιση και παράδειγμα υλοποίησης
Creators: name: Δημανίδης, Φώτιος Ιωακείμ
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Εκπαιδευτικά
Ηλεκτρονικά
Παιχνίδια
Συνεργατικά
Ασύγχρονα
Educational
Computer games
Collaborative
Asynchronous

description: Η βιομηχανία των video games και κατ’ επέκταση η βιομηχανία των computer games είναι μια ταχύτατα αναπτυσσόμενη βιομηχανία η οποία έχει δημιουργήσει ένα μεγάλο κοινό. Τα computer games εκτός από ψυχαγωγία μπορούν να προσφέρουν και στην εκπαιδευτική διαδικασία. Ακόμα πιο πολύ μπορούν να προσφέρουν όταν εμπεριέχουν και συνεργατικά χαρακτηριστικά που ενισχύουν την συνεργασία μεταξύ των παικτών. Στο παρόν έγγραφο θα εξετάσουμε με ποιο τρόπο μπορούν να βοηθήσουν τα εκπαιδευτικά συνεργατικά παιχνίδια την εκπαιδευτική διαδικασία και θα παρουσιάσουμε μία υλοποίηση ενός τέτοιου παιχνιδιού.
description: The video games industry and thus the computer game industry is a rapidly growing industry that currently has a large audience. Computer games apart from entertainment they can contribute to the learning process. The can contribute even more when they include collaborative characteristics that support the collaboration between the players. In this paper we will examine in what way the collaborative educational computer games can aid the learning process and we will present an implementation of such a game.
AXBOROTLASHGAN JAMIYATDA IJTIMOIY-FALSAFIY TAFAKKURNING YANGI YO'NALISHLARI
Creators: name: Shavkat To'rayev Nishonovich
Publisher: name: Zenodo
Year: 2025

description: Annotatsiya. Mazkur maqolada, hozirgi kunda yoshlar ongiga ta’sir etishning asosiy vositasi hisoblangan internet va axborot texnologiyalari haqida bo‘lib, internet ta’sir kuchi beriladigan materiallarning tezkorligi, ko‘tarilayotgan masalalarning dolzarbligi, tahliliylik darajasi va mavjud muammolar mavjud. Internet orqali amalga oshiriladigan va katta mablag‘ talab qilmaydigan g‘oyaviy ta’sir va tazyiqning o‘ziga xosligi va uni insonlar tafakkuriga ta’siriga oid fikrlar ijtimoiy-falsafiy tahlili hamda yechimlari xususida fikr mulohazalar keltirilgan.
HCT/HESP study of two carbon stars from the LAMOST survey
Creators: name: Shejeelammal, J.
name: Goswami, Aruna
name: Shi, Jianrong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Carbon stars, enhanced in carbon and neutron-capture elements, provide wealth of information about the nucleosynthesis history of the Galaxy. In this work, we present the first ever detailed abundance analysis of carbon star LAMOSTJ091608.81+230734.6 and a detailed abundance analysis of neutron-capture elements for the object LAMOSTJ151003.74+305407.3. Updates on the abundances of elements C, O, Mg, Ca, Cr, Mn and Ni for LAMOSTJ151003.74+305407.3 are also presented. Our analysis is based on high resolution spectra obtained using Hanle Echelle Spectrograph (HESP) attached to the Himalayan Chandra Telescope (HCT), IAO, Hanle. The stellar atmospheric parameters (T$_{eff}$, logg, micro-turbulance $ζ$, metallicity [Fe/H]) are found to be (4820, 1.43, 1.62, $-$0.89) and (4500, 1.55, 1.24, $-$1.57) for these two objects respectively. The abundance estimates of several elements, C, N, O, Na, $α$-elements, Fe-peak elements and neutron-capture elements Rb, Sr, Y, Zr, Ba, La, Ce, Pr, Nd, Sm and Eu are presented. Our analysis shows the star LAMOSTJ151003.74+305407.3 to be a CEMP-r/s star, and LAMOSTJ091608.81+230734.6 a CH giant. We have examined if the i-process model yields ([X/Fe]) of heavy elements could explain the observed abundances of the CEMP-r/s star based on a parametric model based analysis. The negative values obtained for the neutron density dependent [Rb/Zr] ratio confirm former low-mass AGB companions for both the stars. Kinematic analysis shows that LAMOSTJ151003.74+305407.3 belongs to the Galactic halo population and LAMOSTJ091608.81+230734.6 to the disc population.
Spatially Resolved Imaging at 350um of Cold Dust in Nearby Elliptical Galaxies
Creators: name: Leeuw, Lerothodi L.
name: Davidson, Jacqueline
name: Dowell, C. Darren
name: Matthews, Henry E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Continuum observations at 350um are presented of seven nearby elliptical galaxies, for which CO-gas disks have recently been resolved with interferometry mapping. These SHARCII mapping results provide the first clearly resolved far-infrared(FIR) to submillimeter(submm) continuum emission from cold dust (with temperatures 32K > T > 22K) of any elliptical galaxy at a distance >40Mpc. The measured FIR excess shows that the most likely and dominant heating source of this dust is not dilute stellar radiation or cooling flows, but rather star-formation, that could have been triggered by an accretion or merger event and fueled by dust-rich material that has settled in a dense region co-spatial with the central CO-gas disks. The dust is detected even in two cluster ellipticals that are deficient in HI, showing that, unlike the HI, cold dust and CO in ellipticals can survive in the presence of hot X-ray gas, even in galaxy clusters. No dust cooler than 20K, either distributed outside the CO disks, or co-spatial with and heated by the entire dilute stellar optical galaxy (or very extended HI), is currently evident.
description: Accepted for publication in The Astrophysical Journal (ApJ) and tentatively scheduled for the ApJ April 10, 2008, v677 n1 issue
Atom-only theories for U(1) symmetric cavity-QED models
Creators: name: Palacino, Roberta
name: Keeling, Jonathan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We consider a generalized Dicke model with U(1) symmetry, which can undergo a transition to a superradiant state that spontaneously breaks this symmetry. By exploiting the difference in timescale between atomic and cavity dynamics, one may eliminate the cavity dynamics, providing an atom-only theory. We show that the standard Redfield theory cannot describe the transition to the superradiant state, but including higher-order corrections does recover the transition. Our work reveals how the forms of effective theories must vary for models with continuous symmetry, and provides a template to develop effective theories of more complex models.
Thermal Expansion and Magnetostriction of the Ising Antiferromagnet TbNi2Ge2
Creators: name: Schmiedeshoff, G. M.
name: Hollen, S. M.
name: Bud'ko, S. L.
name: Canfield, P. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have measured the linear thermal expansion and magnetostriction of the Ising antiferromagnet TbNi2Ge2 along its c-axis from room temperature to 2 K and in magnetic fields to 14 T. We find a magnetic phase diagram that agrees with earlier work and estimate aspects of its uniaxial pressure dependence. We also find a new high field feature near 10 T which may signal the onset of an additional field-induced phase.
description: 2 pages, to apear in proceedings of 24th International Conference on Low Temperature Physics
Η έννοια της ισότητας στη σκέψη του Ronald Dworkin:
Creators: name: Μαυρομμάτης, Θεόδωρος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Ισότητα
Φιλελευθερισμός
Πόροι
Ευημερία
Δημοπρασία
Εξισωτισμός
Dworkin
Egalitarianism
Εquality
Welfare
Resources
Liberalism

description: Το ανά χείρας πόνημα συνιστά μια στα πλάισια του εφικτού κριτική αναλυτική παρουσίαση των αντιλήψεων του Ronald Dworkin αναφορικά με το ζήτημα της ισότητας. Στη βασική του δομή αποτελείται από τρεις ενότητες, κατανομή απόλυτα συμβατή με το πρωτογενές υλικό, εφόσον ληφθεί υπόψη η διάρθρωσή του σε δύο εκτεταμένα άρθρα και η αναγκαιότητα μιας τελικής κριτικής τοποθέτησης του γράφοντος. Έτσι στην πρώτη ενότητα γίνεται λόγος για την ειδικότερη εξισωτική τάση που είναι γνωστή υπό τον όρο «ισότητα ευημερίας» και συνιστά μια απόπειρα εφαρμογής του επίμαχου ιδεώδους με γνώμονα την ευημερία των κοινωνικών υποκειμένων κατά την κατανομή πόρων. Ο όρος «ευημερία», δεκτικός περαιτέρω νοηματικής διευθέτησης, παρουσιάζεται στις ειδικότερες εκδοχές, υπό τις οποίες γίνεται κατανοητός, ενώ το συνολικό πρότυπο αντιμετωπίζεται κριτικά και απορρίπτεται. Ο συγγραφέας ασπάζεται την «ισότητα των πόρων», η οποία αποτελεί αντικείμενο της δεύτερης ενότητας και αποδέχεται την εξίσωση των μελών μιας κοινωνίας στο επίπεδο της διανομής πόρων. Ταυτόχρονα συγχωρεί τις εισοδηματικές διαφοροποιήσεις που οφείλονται στις φιλοδοξίες και τις επιδιώξεις των κοινωνικών υποκειμένων, όχι όμως αυτές που συνιστούν αποτέλεσμα διαφοροποιημένων χαρισμάτων. Τέλος η κριτική αποτίμηση των παραπάνω επικεντρώνεται στον τρόπο, με τον οποίο ο Αμερικάνος στοχαστής καταλήγει στις συμπερασματικές τοποθετήσεις του καθώς και στην δυνατότητα ένταξης των προσεγγίσεων στην υφιστάμενη κοινωνική πραγματικότητα.
description: The present essay constitutes an attempt to critically present Ronald Dworkin’s viewpoint on the subject of equality. Its main structure naturally consists of three units, given that the primary material comprises two extensive articles, while, at the same time, the necessity of a final criticism is beyond any doubt. The first unit deals with the kind of equality known as “equality of welfare”, in which welfare is used as a criterion for the practice of equality in terms of resources distribution. Necessitating further definition, the term “welfare” is thoroughly explained in order for its main types, as well as its internal inconsistencies, to be revealed. Ronald Dworkin embraces the so-called “equality of resources”, which forms the subject of the second unit. This version of equality accepts an initial distribution of resources according to specific conditions and also justifies income differences due to different ambitions and initiatives and not due to different endowments. The final critical approach centres on the methods used by Dworkin, so that conclusions may be drawn, as well as on the impact that “equality of resources” could have on existing societies.
Abundances of neutron-capture elements in CH and Carbon-Enhanced Metal-Poor (CEMP) stars
Creators: name: Purandardas, Meenakshi
name: Goswami, Aruna
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: All the elements heavier than Fe are produced either by slow (-s) or rapid (-r) neutron-capture process. Neutron density prevailing in the stellar sites is one of the major factors that determines the type of neutron-capture processes. We present the results based on the estimates of corrected value of absolute carbon abundance, [C/N] ratio, carbon isotopic ratio and [hs/ls] ratio obtained from the high resolution spectral analysis of six stars that include both CH stars and CEMP stars. All the stars show enhancement of neutron-capture elements. Location of these objects in the A(C) vs. [Fe/H] diagram shows that they are Group I objects, with external origin of carbon and neutron-capture elements. Low values of carbon isotopic ratios estimated for these objects may also be attributed to some external sources. As the carbon isotopic ratio is a good indicator of mixing, we have used the estimates of 12C/13C ratios to examine the occurance of mixing in the stars. While the object HD 30443 might have experienced an extra mixing process that usually occurs after red giant branch (RGB) bump for stars with log(L/L0) > 2.0, the remaining objects do not show any evidence of having undergone any such mixing process. The higher values of [C/N] ratios obtained for these objects also indicate that none of these objects have experienced any strong internal mixing processes. Based on the estimated abundances of carbon and the neutron-capture elements, and the abundance ratios, we have classified the objects into different groups. While the objects HE 0110-0406, HD 30443 and CD-38 2151 are found to be CEMP-s stars, HE 0308-1612 and HD 176021 show characteristic properties of CH stars with moderate enhancement of carbon. The object CD-28 1082 with enhancement of both r- and s-process elements is found to belong to the CEMP-r/s group.
title: Annotated bibliography on exhaust hoods
Creators: name: Beach, R. K.
Publisher: name: National Research Council of Canada. Division Of Building Research
Year: 1964
Subjects: subject: ventilation
subject: ventilation
subject: extractor hoods
subject: hotte d'aspiration

description: The items contained in this annotated bibliography are for the most part the result of a scrutiny of the Engineering Index, Applied Science and Technology Index, British Technology Index and Heating and Ventilating Research Association Library Bulletin, of volumes from 1959 to 1964.
Protein recovery assisted by pulsed electric field treatment from microalgae Chlorella vulgaris and Artrospira platensis
Creators: name: Gusbeth, Christian
name: Scherer, Daniel
name: Krust, Damaris
name: Frey, Wolfgang
name: Müller, Georg
Publisher: name: Karlsruhe
Year: 2019

description: One of the major global challenges of the 21st century is the sustainable supply of the growing world population with food, raw materials and energy. Microalgae cultivated outside farmland under photoautotrophic conditions are a suitable source of renewable raw biomass. By adequate processing of microalgae biomass, products with unique properties can be used as food and feed supplements, in cosmetics and agriculture. The best known examples are dyes astaxanthin, phycocyanin and ß-carotene as well as polyunsaturated fatty acids (PUFA). In spite of this appeal the worldwide production of dry microalgae biomass is only few thousand tonnes per year. This is due to the high investment costs in photo-bioreactors (PBR) and the high energy consumption during down-stream processing of microalgae biomass. To reduce these costs, new technologies and processing methods are required. A suitable alternative to mechanical disruption approaches is the pulsed electric field (PEF) treatment. The extraction efficiency is lower compared to mechanical disruption methods, but the biomass separability is maintained since the morphology of the cells barely changes. In this study we evaluated the potential of PEF treatment for protein and phycocyanin recovery from Chlorella vulgaris and Arthrospira platensis respectively. It is assumed that irreversible electroporation of the cell membrane and the subsequent increased permeabilization are the main effects which allows proteins and other ingredients to pass through the membrane. We observed in our study that efficient protein extraction after PEF treatment requires an incubation step and the progress and kinetics of this outflow is dependent on the biomass concentration and the incubation temperature. The impairment of the molecular outflow at higher temperature (50 °C) and at higher biomass concentration are hints for two different effects. Beside diffusion in a chemical gradient a second biological, enzyme-regulated process within the PEF-treated biomass that facilitates release of proteins from the cells, was considered. This presentation will give an overview about the various factors, such as the post PEF treatment incubation parameters, which have an impact on protein release, as it could be possible to optimize the incubation in order to obtain higher yields.
Self-supervised transfer learning of physiological representations from free-living wearable data
Creators: name: Spathis, Dimitris
name: Perez-Pozuelo, Ignacio
name: Brage, Soren
name: Wareham, Nicholas J.
name: Mascolo, Cecilia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Wearable devices such as smartwatches are becoming increasingly popular tools for objectively monitoring physical activity in free-living conditions. To date, research has primarily focused on the purely supervised task of human activity recognition, demonstrating limited success in inferring high-level health outcomes from low-level signals. Here, we present a novel self-supervised representation learning method using activity and heart rate (HR) signals without semantic labels. With a deep neural network, we set HR responses as the supervisory signal for the activity data, leveraging their underlying physiological relationship. In addition, we propose a custom quantile loss function that accounts for the long-tailed HR distribution present in the general population. We evaluate our model in the largest free-living combined-sensing dataset (comprising >280k hours of wrist accelerometer & wearable ECG data). Our contributions are two-fold: i) the pre-training task creates a model that can accurately forecast HR based only on cheap activity sensors, and ii) we leverage the information captured through this task by proposing a simple method to aggregate the learnt latent representations (embeddings) from the window-level to user-level. Notably, we show that the embeddings can generalize in various downstream tasks through transfer learning with linear classifiers, capturing physiologically meaningful, personalized information. For instance, they can be used to predict variables associated with individuals' health, fitness and demographic characteristics, outperforming unsupervised autoencoders and common bio-markers. Overall, we propose the first multimodal self-supervised method for behavioral and physiological data with implications for large-scale health and lifestyle monitoring.
description: 9 pages, 3 figures (long version of extended abstract arXiv:2011.04601)
Η συμβολή της διδασκαλίας της λογοτεχνίας στην παραγωγή γραπτού λόγου των μαθητών/τριών του Δημοτικού σχολείου:
Creators: name: Μάλλου, Αναστασία Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Διδασκαλία της λογοτεχνίας
Παραγωγή γραπτού λόγου
Αφηγηματικά κείμενα
Επικοινωνιακή αποτελεσματικότητα
Διακειμενικότητα
Κίνητρο για παραγωγή γραπτού λόγου
Literature teaching
Writing
Narrative texts
Communicative effectiveness
Intertextuality
Writing motivation

description: Η παρούσα έρευνα έχει ως σκοπό να διερευνήσει εάν και σε ποιο βαθμό η ανάγνωση και ερμηνεία λογοτεχνικών βιβλίων, ενταγμένων σε ένα αναγνωστικό πρόγραμμα, επιδρά στην ποιότητα των γραπτών κειμένων που παράγουν τα παιδιά στα πλαίσια αυτού του προγράμματος ως έκφραση της αναγνωστικής τους ανταπόκρισης. Για την πραγματοποίηση της έρευνας σχεδιάστηκε και υλοποιήθηκε μια τρίμηνη διδακτική παρέμβαση στη Γ΄ τάξη ενός δημοτικού σχολείου της Θεσσαλονίκης. Από το σύνολο των κειμένων που παρήγαγαν οι μαθητές/τριες στα πλαίσια του προγράμματος, μελετήθηκαν 17 αφηγηματικά κείμενα (13 ατομικά κείμενα, 3 ομαδικά συνταγμένες περιλήψεις βιβλίων και μία ιστορία, αποτέλεσμα συνδημιουργίας του συνόλου των μαθητών/τριών της τάξης). Διαπιστώθηκε ότι η συμμετοχή στο αναγνωστικό πρόγραμμα λειτούργησε για την πλειονότητα των μαθητών/τριών ως ισχυρό κίνητρο για την παραγωγή γραπτών κειμένων που διακρίνονταν στην πλειονότητά τους από ικανοποιητικό έως πολύ ικανοποιητικό βαθμό επικοινωνιακής αποτελεσματικότητας και στα οποία είχαν αξιοποιηθεί δημιουργικά διάφορα στοιχεία των αναγνωσμένων λογοτεχνικών βιβλίων.
description: The present research aims to scrutinize if and to what extend text reading and interpretation, incorporated in a reading programme, reflect on the quality of students’ produced writing texts. These texts in the context of the particular programme are considered as the expression of their reading reflection. For the completion of this research, a three-month teaching unit has been planned and implemented to the 3rd grade of a primary school in Thessaloniki. From the set of the produced texts, 17 narrative texts have been studied (13 individual texts, 3 team worked book summaries and a story created by all students themselves). It was found out that students’ participation to the fore mentioned programme was a strong motivation for text production to the majority of the participants. In addition, the scale of communicative effectiveness has been proved to be either satisfactory or very good in the majority of the texts. Within the texts, elements of the programme’s literature books have been creatively used.
Minimal polynomial of an exponential automorphism of C^n
Creators: name: Zygadło, Jakub
Publisher: name: arXiv
Year: 2008
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14R10, 13N15

description: We show that the minimal polynomial of a polynomial exponential automorphism F of C^n (i.e. F=exp(D), where D is a locally nilpotent derivation) is of the form μ_F(T)=(T-1)^d, d=min{m \in N: D^m(X_i)=0 for i=1,...,n}.
description: 5 pages
Vascular endothelial profilin-1 drives a protumorigenic tumor microenvironment and tumor progression in renal cancer.
Creators: name: Gau, David
name: Boone, David
Publisher: name: University of Notre Dame
Year: 2024
Subjects: classificationCode: 31
subject: Biological sciences
subject: FOS: Biological sciences

description: Overexpression of actin-binding protein profilin-1 (Pfn1) correlates with advanced disease features and adverse clinical outcome of patients with clear cell renal carcinoma, the most prevalent form of renal cancer. We previously reported that Pfn1 is predominantly overexpressed in tumor-associated vascular endothelial cells in human clear cell renal carcinoma. In this study, we combined in vivo strategies involving endothelial cell–specific depletion and overexpression of Pfn1 to demonstrate a role of vascular endothelial Pfn1 in promoting tumorigenicity and enabling progressive growth and metastasis of renal carcinoma cells in a syngeneic orthotopic mouse model of kidney cancer. We established an important role of endothelial Pfn1 in tumor angiogenesis and further identified endothelial Pfn1-dependent regulation of several pro- (VEGF, SERPINE1, CCL2) and anti-angiogenic factors (platelet factor 4) in vivo. Endothelial Pfn1 overexpression increases tumor infiltration by macrophages and concomitantly diminishes tumor infiltration by T cells including CD8+ T cells in vivo, correlating with the pattern of endothelial Pfn1-dependent changes in tumor abundance of several prominent immunomodulatory cytokines. These data were also corroborated by multiplexed quantitative immunohistochemistry and immune deconvolution analyses of RNA-seq data of clinical samples. Guided by Upstream Regulator Analysis of tumor transcriptome data, we further established endothelial Pfn1-induced Hif1α elevation and suppression of STAT1 activation. In conclusion, this study demonstrates for the first time a direct causal relationship between vascular endothelial Pfn1 dysregulation, immunosuppressive tumor microenvironment, and disease progression with mechanistic insights in kidney cancer. Our study also provides a conceptual basis for targeting Pfn1 for therapeutic benefit in kidney cancer.
Estimation of discrete choice models with hybrid stochastic adaptive batch size algorithms
Creators: name: Lederrey, Gael
name: Lurkin, Virginie
name: Hillel, Tim
name: Bierlaire, Michel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: The emergence of Big Data has enabled new research perspectives in the discrete choice community. While the techniques to estimate Machine Learning models on a massive amount of data are well established, these have not yet been fully explored for the estimation of statistical Discrete Choice Models based on the random utility framework. In this article, we provide new ways of dealing with large datasets in the context of Discrete Choice Models. We achieve this by proposing new efficient stochastic optimization algorithms and extensively testing them alongside existing approaches. We develop these algorithms based on three main contributions: the use of a stochastic Hessian, the modification of the batch size, and a change of optimization algorithm depending on the batch size. A comprehensive experimental comparison of fifteen optimization algorithms is conducted across ten benchmark Discrete Choice Model cases. The results indicate that the HAMABS algorithm, a hybrid adaptive batch size stochastic method, is the best performing algorithm across the optimization benchmarks. This algorithm speeds up the optimization time by a factor of 23 on the largest model compared to existing algorithms used in practice. The integration of the new algorithms in Discrete Choice Models estimation software will significantly reduce the time required for model estimation and therefore enable researchers and practitioners to explore new approaches for the specification of choice models.
description: 43 pages
Multicultural clubs in schools: theory and practice
Creators: name: Shiu, Daniel Pui-Yin
Publisher: name: University of British Columbia
Year: 2009

description: Despite the voluminous literature on multicultural education in both theory and practice, research on extra-curricular organizations (such as multicultural clubs) that deal with this issue is rare. As a practical outlet for voicing multicultural concerns, multicultural clubs provide a place for students to take social and political action. This qualitative case study examines multicultural clubs in three secondary schools in the Surrey school district, each unique in its stage of development. Interviews took place during the 1996-97 school year in which one sponsor teacher from each school and seven student members in total participated. The ideas presented in this thesis stem from these interviews and are categorized in terms of the purposes, approaches, activities, and challenges of the three multicultural clubs. The purposes and approaches of the multicultural clubs are expansive in scope as social and political issues (such as equality, human rights, and the environment) are also addressed. Although a number of the clubs' activities do not appear to be exphcitly "multicultural", students and sponsor teachers view them as linked through a broad approach to social and political activism In essence, multicultural clubs empower students as they take on leadership roles in decision-making and in delegating and fulfilling responsibilities, regardless of the issue at hand. Although the main concerns expressed in all of the multicultural clubs include their membership survival and handling of controversial social and political issues, each school has its unique challenges. A number of general recommendations grow out of this study: students must have ownership in the planning and management of the organization; students must believe that the club functions as a forum for social and political activism where they may freely express and initiate their plans; activities based on a particular theme rather than on random spontaneity are more useful and focused in their implementation; support from the school's administrators, staff members, and students is needed; clubs need to set realistic goals; club members continually need to educate themselves through attending workshops and conferences; and time is needed for multicultural clubs to grow, reflect, review, reevaluate, and transform
Transitions of tethered polymer chains: A simulation study with the bond fluctuation lattice model
Creators: name: Luettmer-Strathmann, Jutta
name: Rampf, Federica
name: Paul, Wolfgang
name: Binder, Kurt
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A polymer chain tethered to a surface may be compact or extended, adsorbed or desorbed, depending on interactions with the surface and the surrounding solvent. This leads to a rich phase diagram with a variety of transitions. To investigate these transitions we have performed Monte Carlo simulations of a bond-fluctuation model with Wang-Landau and umbrella sampling algorithms in a two-dimensional state space. The simulations' density of states results have been evaluated for interaction parameters spanning the range from good to poor solvent conditions and from repulsive to strongly attractive surfaces. In this work, we describe the simulation method and present results for the overall phase behavior and for some of the transitions. For adsorption in good solvent, we compare with Metropolis Monte Carlo data for the same model and find good agreement between the results. For the collapse transition, which occurs when the solvent quality changes from good to poor, we consider two situations corresponding to three-dimensional (hard surface) and two-dimensional (very attractive surface) chain conformations, respectively. For the hard surface, we compare tethered chains with free chains and find very similar behavior for both types of chains. For the very attractive surface, we find the two-dimensional chain collapse to be a two-step transition with the same sequence of transitions that is observed for three-dimensional chains: a coil-globule transition that changes the overall chain size is followed by a local rearrangement of chain segments.
description: 17 pages, 12 figures, to appear in J. Chem. Phys
An original framework for Wheat Head Detection using Deep, Semi-supervised and Ensemble Learning within Global Wheat Head Detection (GWHD) Dataset
Creators: name: Fourati, Fares
name: Souidene, Wided
name: Attia, Rabah
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we propose an original object detection methodology applied to Global Wheat Head Detection (GWHD) Dataset. We have been through two major architectures of object detection which are FasterRCNN and EfficientDet, in order to design a novel and robust wheat head detection model. We emphasize on optimizing the performance of our proposed final architectures. Furthermore, we have been through an extensive exploratory data analysis and adapted best data augmentation techniques to our context. We use semi supervised learning to boost previous supervised models of object detection. Moreover, we put much effort on ensemble to achieve higher performance. Finally we use specific post-processing techniques to optimize our wheat head detection results. Our results have been submitted to solve a research challenge launched on the GWHD Dataset which is led by nine research institutes from seven countries. Our proposed method was ranked within the top 6% in the above mentioned challenge.
description: Canadian Journal of Remote Sensing (2021)
Automatic finite elements mesh generation from planar contours of the brain: an image driven 'blobby' approach
Creators: name: Bucki, Marek
name: Payan, Yohan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: In this paper, we address the problem of automatic mesh generation for finite elements modeling of anatomical organs for which a volumetric data set is available. In the first step a set of characteristic outlines of the organ is defined manually or automatically within the volume. The outlines define the "key frames" that will guide the procedure of surface reconstruction. Then, based on this information, and along with organ surface curvature information extracted from the volume data, a 3D scalar field is generated. This field allows a 3D reconstruction of the organ: as an iso-surface model, using a marching cubes algorithm; or as a 3D mesh, using a grid "immersion" technique, the field value being used as the outside/inside test. The final reconstruction respects the various topological changes that occur within the organ, such as holes and branching elements.
Meta-Stable Brane Configurations by Quartic Superpotential for Bifundamentals
Creators: name: Ahn, Changhyun
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The type IIA nonsupersymmetric meta-stable brane configuration consisting of three NS5-branes, D4-branes and anti-D4-branes where the electric gauge theory superpotential has a quartic term for the bifundamentals besides a mass term is constructed. By adding the orientifold 4-plane and 6-plane to this brane configuration, we also describe the intersecting brane configurations of type IIA string theory corresponding to the meta-stable nonsupersymmetric vacua of corresponding gauge theories.
description: 30 pp, 8 figures; pages 7 and 14 improved; to appear in IJMPA