cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Determining our peculiar velocity from the aberration in the cosmic microwave background
Creators: name: Aurich, Ralf
name: Reinhardt, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The motion of our solar system relative to the CMB rest frame leads to subtle distortions in the observed CMB sky map due to the aberration effect. Usually the corresponding peculiar velocity is determined from the CMB dipole but neglecting intrinsic dipole contributions. Here it is investigated whether certain invariant scalar measures, which are derived from first and second order covariant derivatives on the sphere, can detect the distortions caused by the aberration effect at high multipoles. This would in principle allow to disentangle the Doppler from intrinsic dipole contributions providing an independent method for the determination of our peculiar velocity. It is found that the eigenvalues of the Hessian matrix of the temperature field are well suited for that task.
description: 8 pages
The Effects of Implementation Delay on Decision-Making Under Uncertainty
Creators: name: Bayraktar, Erhan
name: Egami, Masahiko
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: Trading and Market Microstructure (q-fin.TR)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 93E20; 60J60

description: In this paper, we accomplish two objectives: First, we provide a new mathematical characterization of the value function for impulse control problems with implementation delay and present a direct solution method that differs from its counterparts that use quasi-variational inequalities. Our method is direct, in the sense that we do not have to guess the form of the solution and we do not have to prove that the conjectured solution satisfies conditions of a verification lemma. Second, by employing this direct solution method, we solve two examples that involve decision delays: an exchange rate intervention problem and a problem of labor force optimization.
Utilizing decision matrices to validate kindergarten screening measures
Creators: name: Peach, Connie J.
Publisher: name: University of British Columbia
Year: 2008

description: The early identification of students at-risk for future learning problems typically forms the basis for the Implementation of early intervention programs designed to prevent, diminish, and/or correct learning difficulties. Kindergarten screening results influence the allocation of special services and are linked with the expenditure of monetary and personnel resources. The extent to which screening contributes to accurate and useful educational decision-making requires evaluation. The purpose of the present study was to investigate the validity and utility of four kindergarten screening measures and their composite screening classification as predictors of third grade achievement. History of school-based intervention and retention status were considered to be additional indices of school performance and their relationship with kindergarten screening results was also investigated. The screening measures included the Draw-A-Person, the Kindergarten Language Screening Test, the Mann-Suiter Visual Motor Screen, and the Deverell Test of Letters and Numbers. The achievement measure employed was the Canadian Tests of Basic Skills. Validity data indicating the degree of accuracy of screening classification decisions (risk/no-risk) was possible through the utilization of decision matrix analysis. Interpretations in this study included percentage calculations of the problem base rate, referral rate, and overall hit rate. Vertical evaluation presents prediction accuracy in relation to criterion (actual) performance versus horizontal evaluation which is calculated in relation to screening (predicted) performance. Prediction-performance matrices presented in this study represent data available for one age coliort of 684 subjects enrolled since kindergarten in one school district located near Vancouver, British Columbia. Seven achieved samples were generated, the number of subjects ranging from 576-663. The results of this study demonstrate that screening referral rates were less than their respective problem base rates, indicating general under-referral of at-risk students. For all analyses, vertical evaluation more appropriately demonstrated greater under-referral rates than did horizontal evaluation. Vertical evaluation also contributed to greater accuracy of interpretation than did horizontal evaluation which proved to be misleading. Specificity rates (vertically calculated true negatives) were much larger than sensitivity rates (vertically calculated true positives), indicating far greater accuracy for the identification of non-risk than at-risk students. Overall hit rates were high but misleading as the proportions of correctly identified at-risk and non-risk students were not indicated.
Ausbau als Nachbau. Zum heuristischen Wert des Ausbaukonzepts im Rahmen der englischen Sprachgeschichtsschreibung
Creators: name: Weber, Beatrix
Publisher: name: JournaLIPP
Year: 2014

description: Das Konzept ‚Ausbau‘, das von Heinz Kloss (1952, 21978) eingeführt und von Peter Koch und Wulf Oesterreicher (1994) weiterentwickelt wurde, birgt ein erhebliches Er-klärungspotential mit Blick auf sprachliche Standardisierungsprozesse. Gerade in Be-zug auf die Geschichte des Englischen, die sich zu einem ganz wesentlichen Teil als Standardisierungsgeschichte konzeptionalisieren lässt, wurde dieses Konzept jedoch bis jetzt noch kaum herangezogen. In diesem Aufsatz möchte ich aufzeigen, welchen Erklä-rungswert das Ausbaukonzept als heuristische Grundlage für Untersuchungen im Be-reich der englischen Sprachgeschichte haben kann. Hierzu setze ich mich mit den Ur-sprüngen des Konzepts bei Kloss sowie mit dessen Weiterentwicklung durch Koch/Oes-terreicher theoretisch auseinander, um schließlich ein praktisches Anwendungsbeispiel geben zu können, das illustrieren soll, inwiefern sich ein konkretes syntaktisch-lexikali-sches Phänomen als eine Manifestation von Ausbau betrachten lässt. Das von mir the-matisierte Ausbauphänomen – Konstruktionen mit engl. notwithstanding – kann als ein für die englische Ausbaugeschichte prototypisches Beispiel gelten, da es eine lateini-sche bzw. französische Modellkonstruktion imitiert. Dieses Moment das Sprachkontakts ist charakteristisch für den Ausbau des Englischen, was sich im Terminus ‚Nachbau’, den ich für diesen Zusammenhang vorschlage, begrifflich manifestiert.
description: JournaLIPP, Nr. 2 (2013): Sprachwandel
Multiphoton Processes in Driven Mesoscopic Systems
Creators: name: Silva, Alessandro
name: Kravtsov, Vladimir E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the statistics of multi-photon absorption/emission processes in a mesoscopic ring threaded by an harmonic time-dependent flux $Φ(t)$. For this sake, we demonstrate a useful analogy between the Keldysh quantum kinetic equation for the electrons distribution function and a Continuous Time Random Walk in energy space with corrections due to interference effects. Studying the probability to absorb/emit $n$ quanta $\hbarω$ per scattering event, we explore the crossover between ultra-quantum/low-intensity limit and quasi-classical/high-intensity regime, and the role of multiphoton processes in driving it.
description: 6 pages, 5 figures, extended version
Chemical Abundances and Dust in Planetary Nebulae in the Galactic Bulge
Creators: name: Gutenkunst, S.
name: Bernard-Salas, J.
name: Pottasch, S. R.
name: Sloan, G. C.
name: Houck, J. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present mid-infrared Spitzer spectra of eleven planetary nebulae in the Galactic Bulge. We derive argon, neon, sulfur, and oxygen abundances for them using mainly infrared line fluxes combined with some optical line fluxes from the literature. Due to the high extinction toward the Bulge, the infrared spectra allow us to determine abundances for certain elements more accurately that previously possible with optical data alone. Abundances of argon and sulfur (and in most cases neon and oxygen) in planetary nebulae in the Bulge give the abundances of the interstellar medium at the time their progenitor stars formed; thus these abundances give information about the formation and evolution of the Bulge. The abundances of Bulge planetary nebulae tend to be slightly higher than those in the Disk on average, but they do not follow the trend of the Disk planetary nebulae, thus confirming the difference between Bulge and Disk evolution. Additionally, the Bulge planetary nebulae show peculiar dust properties compared to the Disk nebulae. Oxygen-rich dust feature (crystalline silicates) dominate the spectra of all of the Bulge planetary nebulae; such features are more scarce in Disk nebulae. Additionally, carbon-rich dust features (polycyclic aromatic hydrocarbons) appear in roughly half of the Bulge planetary nebulae in our sample, which is interesting in light of the fact that this dual chemistry is comparatively rare in the Milky Way as a whole.
description: 16 pages, 5 figures, accepted to ApJ
Long colimits of topological groups III: Homeomorphisms of products and coproducts
Creators: name: Dahmen, Rafael
name: Lukács, Gábor
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 22A05 (Primary) 22F50, 03E10 (Secondary)

description: The group of compactly supported homeomorphisms on a Tychonoff space can be topologized in a number of ways, including as a colimit of homeomorphism groups with a given compact support, or as a subgroup of the homeomorphism group of its Stone-Čech compactification. A space is said to have the Compactly Supported Homeomorphism Property (CSHP) if these two topologies coincide. The authors provide necessary and sufficient conditions for finite products of ordinals equipped with the order topology to have CSHP. In addition, necessary conditions are presented for finite products and coproducts of spaces to have CSHP.
Searching for the 1 mHz variability in the flickering of V4743 Sgr: a Cataclysmic Variable accreting at a high rate
Creators: name: Dobrotka, A.
name: Orio, M.
name: Benka, D.
name: Vanderburg, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: AIMS: A few well studied cataclysmic variables (CVs) have shown discrete characteristic frequencies of fast variability; the most prominent ones are around log(f/Hz) $\simeq$ -3. Because we still have only small number statistics, we obtained a new observation to test whether this is a general characteristic of CVs, especially if mass transfer occurs at a high rate typical for dwarf nova in outbursts, in the so called "high state". METHODS: We analyzed optical Kepler data of the quiescent nova and intermediate polar V4743 Sgr. This system hosts a white dwarf accreting through a disk in the high state. We calculated the power density spectra, and searched for break or characteristic frequencies. Our goal is to assess whether the mHz frequency of the flickering is a general characteristic. RESULTS: V4743 Sgr has a clear break frequency at log(f/Hz) $\simeq$ -3. This detection increases the probability that the mHz characteristic frequency is a general feature of CVs in the high state, from 69% to 91%. Furthermore, we propose the possibility that the variability is generated by similar mechanism as in the nova-like system MV Lyr, which would make V4743 Sgr unique.
description: accepted for publication to A&A
Additional file 1 of It probably worked: a Bayesian approach to evaluating the introduction of activity-based hospital payment in Israel
Creators: name: Waitzberg, Ruth
name: Siegel, Martin
name: Quentin, Wilm
name: Busse, Reinhard
name: Greenberg, Dan
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Marine Biology

description: Additional file 1. Appendix.
A model for solar flares and coronal heating based on magnetohydrodynamic avalanches
Creators: name: Reid, Jack
Publisher: name: University of St Andrews
Year: 2020
Subjects: Sun: corona
Sun: magnetic fields
Methods: numerical
Magnetohydrodynamics (MHD)
Magnetic reconnection
The Sun
Coronal heating

description: The coronal heating problem addresses how temperatures in the solar atmosphere increase by millions of degrees, moving up from the cool surface, into the upper reaches of the atmosphere. This heating, known to be attributable to the magnetic field, has attracted several possible explanations. Attention here focuses on the viability and onset of magnetohydrodynamic avalanches. One means of transferring energy from interior convective motions is through photospheric motions, for example granulation and super-granulation. The power transferred by these photospheric motions stores energy in the global coronal magnetic field, and in coronal loops within active regions. The fields become highly braided, such that an ideal kink-mode instability occurs within one strand of a loop. Then, this instability rapidly expands, destabilizing the surrounding magnetic field, and destroying neighbouring threads. Bursty events occur in an intermittent, impulsive series, Parker's so-called nanoflares, above a largely steady background. This heating is then investigated in order to determine the respective contributions of the physical mechanisms of viscosity and resistivity. Arbitrary distributions of non-uniform heating occur across the domain. The localization and impulsiveness are investigated in respect of field-aligned heating properties. These heating profiles are tested in a hydrodynamic model of single coronal strands. This heating is found capable of maintaining approximately coronal conditions. Interestingly, three-dimensional MHD simulations and field-aligned, one-dimensional models produce similar behaviours, apart from in velocity, and this may have observable consequences. Throughout, magnetic reconnection is vital in contributing to coronal heating. Therefore, the onset and locations of reconnection are identified, and compared with several possible indicators. The widely used squashing factor, Q, little agrees with the sites of reconnection in a braided MHD field. Based on these results, magnetohydrodynamic avalanches can occur and produce sufficient energy to maintain the elevated temperatures of coronal loops.
Νεολιθική κεραμική από τη Μακεδονία. Πετρογραφική ανάλυση της κεραμικής από τον Κάτω Άγιο Ιωάννη Πιερίας
Creators: name: Χονδρού, Νίκη Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Πετρογραφική ανάλυση
Κεραμική τεχνολογία
Κάτω Άγιος Ιωάννης
Petrographic analysis
Pottery technology
Kato Agios Ioannis

description: Η παρούσα μεταπτυχιακή εργασία αφορά στην πετρογραφική ανάλυση της κεραμικής από τον Κάτω Άγιο Ιωάννη Πιερίας. Αρχικά, πραγματοποιείται μια σύντομη αναφορά στις διάφορες προσεγγίσεις στην κεραμική και τις αναλυτικές μεθόδους των θετικών επιστημών και γίνεται αναδρομή στην ιστορία της έρευνας της Νεολιθικής στην Ελλάδα και των βασικών χαρακτηριστικών της περιόδου. Εξετάζεται το γεωλογικό υπόβαθρο της περιοχής και περιγράφεται η μεθοδολογία που ακολουθήθηκε. Στη συνέχεια, παρουσιάζονται τα αποτελέσματα της πετρογραφικής ανάλυσης, γίνεται προσπάθεια ανασύστασης των τεχνολογικών επιλογών και παρουσιάζεται, συνοπτικά, η συνολική εικόνα που αποκομίζουμε για την κεραμική της θέσης.
description: This master thesis focuses on the petrographic analysis of pottery from Kato Agios Ioannis, Pieria. Initially, a brief reference is made to the various approaches to ceramics and analytical methods of the sciences, and a review is made of the history of the Neolithic research in Greece and the main characteristics of the period. It examines the geological background of the area and describes the methodology followed. Then, the results of the petrographic analysis are presented and an attempt is made to reconstitute the technological choices. Finally, the overall image we obtain for the pottery of the site is presented in summary.
Maximum observable correlation for a bipartite quantum system
Creators: name: Hall, Michael J. W.
name: Andersson, Erika
name: Brougham, Thomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The maximum observable correlation between the two components of a bipartite quantum system is a property of the joint density operator, and is achieved by making particular measurements on the respective components. For pure states it corresponds to making measurements diagonal in a corresponding Schmidt basis. More generally, it is shown that the maximum correlation may be characterised in terms of a `correlation basis' for the joint density operator, which defines the corresponding (nondegenerate) optimal measurements. The maximum coincidence rate for spin measurements on two-qubit systems is determined to be (1+s)/2, where s is the spectral norm of the spin correlation matrix, and upper bounds are obtained for n-valued measurements on general bipartite systems. It is shown that the maximum coincidence rate is never greater than the computable cross norm measure of entanglement, and a much tighter upper bound is conjectured. Connections with optimal state discrimination and entanglement bounds are briefly discussed.
description: Revtex, no figures
Report of the Seminar on Communication and Culture
Creators: name: Klumpp, James F.
name: And Others
Publisher: name: Digital Repository at the University of Maryland
Year: 1990
Subjects: Kenneth Burke
Communication and Culture
Rhetorical Theory
Rhetorical Criticism

description: Report of a seminar held at the Second Conference of the Kenneth Burke Society, New Harmony, IN, May 1990.  Records topics and outcomes for the seminar.  Includes ideas about how to use Kenneth Burke's ideas and methods to understand the relationship between Communication and Culture.
description: Kenneth Burke Society
Συγκριτική μελέτη γραμμικών μοντέλων και νευρωνικών δικτύων για την λήψη ορθολογικών αποφάσεων
Creators: name: Τζώτζης, Χρήστος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Τεχνητά νευρωνικά δίκτυα
Περιορισμένη ορθολογικότητα
Γραμμικά μοντέλα
Ελαστική παλινδρόμηση
Artificial Neural Networks
Bounded Rationality
Linear Models
Elastic Net

description: Τα τεχνητά νευρωνικά δίκτυα αποτελούν, μέχρι σήμερα, μια πολύ δημοφιλή διαδικασία προσδιορισμού της βέλτιστης λύσης διάφορων προβλημάτων. Στην παρούσα εργασία κατασκευάζονται δώδεκα διαφορετικά τεχνητά νευρωνικά δίκτυα και τέσσερα γραμμικά μοντέλα με σκοπό τον έλεγχο των περιορισμών των ορθολογικών αποφάσεων που λαμβάνονται από αυτά. Τα μοντέλα αυτά εφαρμόζονται στην πρόβλεψη της μέσης τιμής ακινήτων στα προάστια της Βοστώνης και μελετώνται οι προβλέψεις που κάνουν σε σχέση με τις πραγματικές τιμές. Η αξιολόγηση των μοντέλων αυτών έγινε με τη μέθοδο της επαναλαμβανόμενης διασταυρωμένης επικύρωσης, ενώ για την σύγκρισή τους χρησιμοποιήθηκαν η ρίζα του μέσου τετραγωνικού σφάλματος και ο συντελεστής προσδιορισμού. Από τα αποτελέσματα που προκύπτουν, εξάγεται το συμπέρασμα πως τόσο τα γραμμικά μοντέλα, όσο και τα νευρωνικά δίκτυα, είναι σε θέση να λάβουν μία ικανοποιητική αλλά και μία ορθολογική απόφαση. Η σύγκριση των μοντέλων αναδεικνύει το τεχνητό νευρωνικό δίκτυο ως το καταλληλότερο μοντέλο πρόβλεψης για το πείραμα.
description: Artificial neural networks are, to date, a very popular process of identifying the best solution for various problems. In the present study twelve different artificial neural networks and four linear models are constructed to control the limitations of rational decisions taken by them. These models are applied to prediction of the average property price in Boston suburbs and their predictions are made relative to real prices. The evaluation of these models was done by the repeated cross-validation method, while for comparison, the root mean square error and the coefficient of determination were used. From the results obtained, it is concluded that both linear models and artificial neural networks are able to obtain a satisfactory and also a rational decision. The comparison of models highlights the artificial neural network as the most appropriate prediction model for the experiment.
Estimating the Fractal Dimension of the S&P 500 Index using Wavelet Analysis
Creators: name: Bayraktar, Erhan
name: Poor, H. Vincent
name: Sircar, Ronnie
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Mathematics
subject: FOS: Economics and business

description: S&P 500 index data sampled at one-minute intervals over the course of 11.5 years (January 1989- May 2000) is analyzed, and in particular the Hurst parameter over segments of stationarity (the time period over which the Hurst parameter is almost constant) is estimated. An asymptotically unbiased and efficient estimator using the log-scale spectrum is employed. The estimator is asymptotically Gaussian and the variance of the estimate that is obtained from a data segment of $N$ points is of order $\frac{1}{N}$. Wavelet analysis is tailor made for the high frequency data set, since it has low computational complexity due to the pyramidal algorithm for computing the detail coefficients. This estimator is robust to additive non-stationarities, and here it is shown to exhibit some degree of robustness to multiplicative non-stationarities, such as seasonalities and volatility persistence, as well. This analysis shows that the market became more efficient in the period 1997-2000.
Additional file 1 of Fruitful exchanges: social networks and food resources amidst change
Creators: name: Schramski, Sam
name: Barbosa de Lima, Ana Carolina
Publisher: name: figshare
Year: 2022
Subjects: subject: Sociology
subject: FOS: Sociology

description: Additional file 1. Glossary and regression model outputs. A glossary of centrality terms, as well as outputs for regression models used in the study.
Duplicità dell'oggetto filmico
Creators: name: Angelucci, Daniela
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2014

description: This essay describes some aspects of the cinematographic object understood not only as an artistic product to be evaluated, nor only in its narrative content, but as the center of a composite device. Such a device combines different elements: the film in its entirety, the author’s thoughts, and the fundamental experience of the viewer. Following Christian Metz’s perspective, the first result we may findis the recognition of a fundamental duality of the film: compared to other means of expression, the film stimulates many axes of perception while being at the same time less perceptual, because what is shown on the screen is always recorded, past and basically absent. This duplicity of cinema is connected to other issues psychoanalytic perspective offers convincing answers to: the 'paradox' of fiction; the spectator’s identification with his own eyes; the doubling of the distance from the cinematic images.
description: Lebenswelt. Aesthetics and philosophy of experience., No 5 (2014)
Exchange Bias and Vertical Shift in CoFe2O4 nanoparticles
Creators: name: Mumtaz, A.
name: Maaz, K.
name: Janjua, B.
name: Hasanain, S. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic properties of core-shell cobalt ferrite nanoparticles 15 to 48nm prepared by a sol-gel route have been studied. It is shown that the coercivity follows non-monotonic size dependence varying as 1/d above the maximum (d is the particle size). Field cooled magnetization exhibited both horizontal (exchange bias) and vertical shifts. The exchange bias is understood as originating at the interface between a surface region with structural and spin disorder and a core ferrimagnetic region. The dependence of the exchange bias and vertical shifts on the particle sizes and cooling fields are found to have significant differences and the differences are explained in the light of recent results which suggest that both weakly and strongly pinned spins are present at the interface. It is suggested that the exchange bias is dominated by the weakly pinned spins while the vertical shift is affected by the strongly pinned ones.
description: 23
La fragilità dell'oggetto estetico
Creators: name: Bartalesi, Lorenzo
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2014

description: The problematic notion of the «aesthetic object» prevents us from understanding the real nature of the aesthetic dimension. Therefore, a survey of the aesthetic relation as a cognitive attitude should take the place of the ontology of the aesthetic object. Such a reversal of perspective has the merit of invalidating the essentialist strategy but may result in disregarding the objectual pole of the aesthetic relation and reducing the notion of aesthetic to a psychological purely internal and subjective process or to a symbolic-interpretative relation. How does an object with an economical, ritual, religious or instrumental purpose works when it gets into an aesthetic relation? Recently, socio-cultural and evolutionary anthropologists have proposed some interpretative categories like «agency» or «artification» that face the question with a praxeological rather than semantic approach.This paper aims to integrate these notions within a expressivist theory of the aesthetic behavior. Starting from a description of perception as an expressive activity and of the aesthetic attitude as a dynamical interplay between emotion and cognition, the purpose is to propose a theory of how an object works in an aesthetic mode, a theory that must be able to escape both pansemiotism and cognitivist and emotivist subjectivism.
description: Lebenswelt. Aesthetics and philosophy of experience., No 5 (2014)
NIR Follow-Up of the VVDS 02hr Field
Creators: name: Temporin, S.
name: Iovino, A.
name: McCracken, H. J.
name: Bolzonella, M.
name: Scodeggio, M.
name: Bottini, D.
name: Garilli, B.
name: Brun, V. Le
name: Fevre, O. Le
name: Maccagni, D.
name: Picat, J. -P.
name: Scaramella, R.
name: Tresse, L.
name: Vettolani, G.
name: Zanichelli, A.
name: Adami, C.
name: Arnouts, S.
name: Bardelli, S.
name: Cappi, A.
name: Charlot, S.
name: Ciliegi, P.
name: Contini, T.
name: Cucciati, O.
name: Foucaud, S.
name: Franzetti, P.
name: Gavignaud, I.
name: Guzzo, L.
name: Ilbert, O.
name: Marano, B.
name: Marinoni, C.
name: Mazure, A.
name: Meneux, B.
name: Merighi, R.
name: Paltani, S.
name: Pello, R.
name: Pollo, A.
name: Pozzetti, L.
name: Radovich, M.
name: Zamorani, G.
name: Zucca, E.
name: Bondi, M.
name: Bongiorno, A.
name: Brinchmann, J.
name: de la Torre, S.
name: Lamareille, F.
name: Mellier, Y.
name: Merluzzi, P.
name: Vergani, D.
name: Walcher, C. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new K-band survey covering 623 arcmin$^2$ in the VVDS 0226-0430 deep field down to a limiting magnitude K$_{\rm{Vega}}$ $\leq$ 20.5. We use the spectroscopic sample extracted from this new K-band catalogue to assess the effectiveness of optical-near infrared color selections in identifying extreme classes of objects at high redshift.
description: 6 pages, 4 figures. To appear in the Proceedings of the IAU Symposium No. 235, 2006, "Galaxy Evolution across the Hubble Time", F. Combes & J. Palous, eds
Exploiting dijet resonance searches for flavor physics
Creators: name: Bordone, Marzia
name: Greljo, Admir
name: Marzocca, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, we reinterpret ATLAS and CMS dijet resonance searches to set robust constraints on all hypothetical tree-level scalar and vector mediators with masses up to 5 TeV, assuming a diquark or a quark-antiquark coupling with an arbitrary flavor composition. To illustrate the application of these general results, we quantify the permissible size of new physics in $\bar B_q\to D_q^{(*)+} \,\{π, K\}$ consistent with the absence of signal in dijet resonance searches. Along the way, we perform a full SMEFT analysis of the aforementioned non-leptonic $B$ meson decays at leading-order in $α_s$. Our findings uncover a pressing tension between the new physics explanations of recently reported anomalies in these decays and the dijet resonant searches. The high-$p_T$ constraints are crucial to drain the parameter space consistent with the low-$p_T$ flavor physics data.
description: 42 pages, 9 figures, 3 tables. v2: Version accepted in JHEP
Super-critically accreting stellar-mass black holes as ultraluminous X-ray sources
Creators: name: Poutanen, Juri
name: Lipunova, Galina
name: Fabrika, Sergei
name: Butkevich, Alexey G.
name: Abolmasov, Pavel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive the luminosity-temperature relation for the super-critically accreting black holes (BHs) and compare it to the data on ultraluminous X-ray sources (ULXs). At super-Eddington accretion rates, an outflow forms within the spherization radius. We construct the accretion disc model accounting for the advection and the outflow, and compute characteristic disc temperatures. The bolometric luminosity exceeds the Eddington luminosity L_Edd by a logarithmic factor 1+0.6 ln mdot (where mdot is the accretion rate in Eddington units) and the wind kinetic luminosity is close to L_Edd. The apparent luminosity for the face-on observer is 2-7 times higher because of geometrical beaming. Such an observer has a direct view of the inner hot accretion disc, which has a peak temperature T_max of a few keV in stellar-mass BHs. The emitted spectrum extends as a power-law F_E ~ E**{-1} down to the temperature at the spherization radius T_sp ~ mdot**(-1/2) keV. We associate T_max with a few keV spectral components and T_sp with the soft, 0.1-0.2 keV components observed in ULXs. An edge-on observer sees only the soft emission from the extended envelope, with the photosphere radius exceeding the spherization radius by orders of magnitude. The dependence of the photosphere temperature on luminosity is consistent with that observed in the super-Eddington accreting BHs SS 433 and V4641 Sgr. Strong outflows combined with the large intrinsic X-ray luminosity of the central BH explain naturally the presence of the photoionized nebulae around ULXs. An excellent agreement between the model and the observational data strongly argues in favour of ULXs being super-critically accreting, stellar-mass BHs similar to SS 433, but viewed close to the symmetry axis.
description: 8 pages, 5 figures; heavily revised version; accepted to MNRAS
Additional file 1 of Association between the time-varying arterial carbon dioxide pressure and 28-day mortality in mechanically ventilated patients with acute respiratory distress syndrome
Creators: name: Zhang, Rui
name: Chen, Hui
name: Teng, Ran
name: Li, Zuxian
name: Yang, Yi
name: Qiu, Haibo
name: Liu, Ling
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Biological Sciences not elsewhere classified
Science Policy
Computational Biology

description: Supplementary Material 1
Introductory workshop on research data management for data representatives (in environmental science)
Creators: name: Kollai, Helen
name: Remmler, Paul
Publisher: name: Zenodo
Year: 2021
Subjects: training
research data management
Forschungsdatenmanagement
data lifecycle

description: Slides for a 3 hour introductory session on research data management with examples from environmental science and a short introduction into the data management infrastructures provided at Helmholtz Centre for Environmental Research - UFZ, Germany. Aim: awareness raising and transfer of basic knowledge on processes and tools Participants scope: institutional data representatives of research departments Expected level of experience: mixed
L’objet feuilleté. Sulla fotografia tra Barthes e Proust
Creators: name: Guindani-Riquier, Sara
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2014

description: Photography incarnates a dream of transparency since, as Roland Barthes says, “a photograph is always invisible: it is not it that we see. In short, the referent adheres”. In this regard, he provides a strange example: “The Photograph belongs to that class of laminated objects whose two leaves cannot be separated without destroying them both: the windowpane and the landscape”. In this sense, photography perfectly realises the illusion of a support which is unveiled in its materiality in order to become a pure objectivity. According to Proust, this supposed transparency is destined to fail: no photograph, in the Recherche, ever leads us to a moment of recognition. It's as if photographs were not able to let the original rise up – in transparency – without operating some kind of alteration or modification.

 Proust’s scepticism toward photography is bound to a particular conception of time: he criticises in particular the instantané, a kind of image that pretends to extract a sole instant from the continual flux of time.

The instantané, however, is not the only aspect of photography considered by Proust. Proust uses expressions like “cliché négatif”, “chambre noire intérieure”, “entrée condamnée”, to show us less the description of a “photo-graphy” (light-writing) than that of a “skia-graphy” (shadows-writing). Finally, I consider the topos of the “not developed” photograph with relation to the Proustian conception of memory, that is, a memory which, according to Walter Benjamin, is deeply connected with oblivion and with the shadows of our experience.
description: Lebenswelt. Aesthetics and philosophy of experience., No 5 (2014)
VIODE: A Simulated Dataset to Address the Challenges of Visual-Inertial Odometry in Dynamic Environments
Creators: name: Minoda, Koji
name: Schilling, Fabian
name: Wüest, Valentin
name: Floreano, Dario
name: Yairi, Takehisa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Dynamic environments such as urban areas are still challenging for popular visual-inertial odometry (VIO) algorithms. Existing datasets typically fail to capture the dynamic nature of these environments, therefore making it difficult to quantitatively evaluate the robustness of existing VIO methods. To address this issue, we propose three contributions: firstly, we provide the VIODE benchmark, a novel dataset recorded from a simulated UAV that navigates in challenging dynamic environments. The unique feature of the VIODE dataset is the systematic introduction of moving objects into the scenes. It includes three environments, each of which is available in four dynamic levels that progressively add moving objects. The dataset contains synchronized stereo images and IMU data, as well as ground-truth trajectories and instance segmentation masks. Secondly, we compare state-of-the-art VIO algorithms on the VIODE dataset and show that they display substantial performance degradation in highly dynamic scenes. Thirdly, we propose a simple extension for visual localization algorithms that relies on semantic information. Our results show that scene semantics are an effective way to mitigate the adverse effects of dynamic objects on VIO algorithms. Finally, we make the VIODE dataset publicly available at https://github.com/kminoda/VIODE.
description: 8 pages, 8 figures, accepted for publication in the IEEE Robotics and Automation Letters (RA-L) January 31, 2021. IEEE Xplore link: https://ieeexplore.ieee.org/document/9351597/
Oggetti fisici (e non)
Creators: name: Morganti, Matteo
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2014

description: This essay aims to discuss a potential conflict between two intuitions about material objects: a 'pluralist' one, according to which every object belongs (or may belong) to more than one kind, and a 'reductionist' one, according to which there is only one fundamental type of things, i.e., material things. The former view threatens to translate a merely subjective matter of fact into an ontological fact, while the latter naturally leads to an outdated form of physicalism. What then? How to satisfy both the request for a precise ontology and the need to make sense of the richness of our experience of things? The paper reconstructs the general structure of the issue, and explores two ways of solving it via the formulation of an intermediate view.
description: Lebenswelt. Aesthetics and philosophy of experience., No 5 (2014)
L'oggetto sguardo nell'insegnamento di Lacan
Creators: name: Pagliardini, Alex
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2014

description: The eye occupies a central place in the teaching of Jacques Lacan. In particular, it finds its almost final formulation in Seminar X (1962-63) and Seminar XI (1964). In these Seminars the field of vision is no longer the place of illusion and mirage of the subjective identity, but it becomes the same field crossed by Freud’s Unheimlich, namely that of the sudden apparition of what is invisible. ‘Look’ is the name that Lacan gives to this appearance. The effects of what Lacan calls the ‘look function’ are: a radical alteration of the coordinates of the visual field and an effect of anguish. In such a perspective, the visual field becomes the proper place to radicalize the idea of the ‘subversion of the subject’: the subject doesn’t look, he/she is looked, the gaze looks at the subject, grabs him/her, and, in doing so, it determines the subject. Thus, Lacan reduces the subject to a claim, a need, that crosses and distorts the visual field. This distortion forces the subject to meet his/her condition of object. From this point of view, visual arts are a privileged territory to establish a certain relationship with the constant distortion of the eye (since aesthetics is, after all, ethics), therefore with that objectual condition that each subject embodies.
description: Lebenswelt. Aesthetics and philosophy of experience., No 5 (2014)
title: How surrogate models can enable integration of experiments, big data, modelling and simulation
Creators: name: Taylor, Jack
name: Castagna, Jony
name: Mason, Luke
name: Alexandrov, Vassil
Publisher: name: STFC
Year: 2021

description: AI surrogate models for science, based on Deep Neural Networks (DNN), are becoming increasingly popular. This is especially the case for generative models such as Autoencoders and Generative Adversarial Networks (GANs), which are showing promising results and exciting opportunities in several fields of science. We present here an overview of the current state of the art for surrogate modelling, starting with a broad view across several fields, ranging from particle methods for Molecular Dynamics to continuum solvers for Computational Fluid Dynamics. We then focus our attention to applications in Nuclear Fusion through plasma physics simulation, presenting the latest results and achievements. The paper not only outlines current limitations but also proposes the next steps in the research, in order to connect the high accuracy prediction power of the DNN together with scientific understanding and will detail the current state of their scalability on large computing resources. The main intention is to build a road map that bridges the traditional science and the novel big data in order to have solid and reliable surrogate models.
Analysis of the neutron matter equation of state and the symmetry energy up to fourth order of chiral effective field theory
Creators: name: Sammarruca, Francesca
name: Millerson, Randy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present predictions for the neutron matter equation of state, from leading to fourth order of chiral effective field theory, using recently developed, accurate chiral nucleon-nucleon potentials. We find the impact of subleading three-neutron forces to be mild and attractive. We also show order-by-order predictions for the symmetry energy, and discuss its density dependence in relation to empirical constraints.
description: 9 pages, 7 figures
L'oggettività della fotografia e la conoscenza stereoscopica: da Proust a Barthes e ritorno
Creators: name: Piazza, Marco
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2014

description: This article analyzes the characteristics and the purposes that the object “photography” has in Proust’s Recherche and in Roland Barthes’ La chambre claire, by recognizing within these two texts a the double challenge represented by photography itself: that of being a transparent object and that of allowing the fruition of the extra-temporality. Barthes’ realism, however, prevents the critic from considering in its full extent the cognitive value of photography, as configured in Proust’s text, which is placed in watermark in relation to the Barthes’ discourse. Proust’s complex position with respect to the object “photography”, which he criticizes, among many other reasons, for thesnap-shot platitude, includes even a possible parallelism with the involuntary memory, since the heuristic meaning of photography is connected to the cognitive and affective dinamycs which guide our processes of remembrance and creative relationship with our own past.
description: Lebenswelt. Aesthetics and philosophy of experience., No 5 (2014)
Phase Diagram for the Methane-Ethane System and its Implications for Titan's Lakes
Creators: name: Engle, Anna E.
name: Hanley, Jennifer
name: Dustrud, Shyanne
name: Thompson, Garrett
name: Lindberg, Gerrick E.
name: Grundy, William M.
name: Tegler, Stephen C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: On Titan, methane (CH4) and ethane (C2H6) are the dominant species found in the lakes and seas. In this study, we have combined laboratory work and modeling to refine the methane-ethane binary phase diagram at low temperatures and probe how the molecules interact at these conditions. We used visual inspection for the liquidus and Raman spectroscopy for the solidus. Through these methods we determined a eutectic point of 71.15$\pm$0.5 K at a composition of 0.644$\pm$0.018 methane - 0.356$\pm$0.018 ethane mole fraction from the liquidus data. Using the solidus data, we found a eutectic isotherm temperature of 72.2 K with a standard deviation of 0.4 K. In addition to mapping the binary system, we looked at the solid-solid transitions of pure ethane and found that, when cooling, the transition of solid I-III occurred at 89.45$\pm$0.2 K. The warming sequence showed transitions of solid III-II occurring at 89.85$\pm$0.2 K and solid II-I at 89.65$\pm$0.2 K. Ideal predictions were compared to molecular dynamics simulations to reveal that the methane-ethane system behaves almost ideally, and the largest deviations occur as the mixing ratio approaches the eutectic composition.
Dynamics of Charged Particles in the Radio Emission Region of Pulsar Magnetosphere
Creators: name: Thomas, R. M. C.
name: Gangadhara, R. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the classical picture of three dimensional motion of charged particles in pulsar magnetosphere. We adopt a perturbative method to solve the equation of motion, and find the trajectory of particles as they move along the rotating dipolar magnetic field lines. Our aim is to study the influence of rotation on the pulsar radio emission by considering the constrained motion of particles along the open dipolar magnetic field lines. We find that the rotation induces a significant curvature into the particle trajectories. Our model predicts the intensity on leading side dominates over that of trailing side. We expect that if there is any curvature induced radio emission from the region close to the magnetic axis then it must be due to the rotation induced curvature. Our model predicts the radius--to--frequency mapping (RFM) in the core emissions.
description: 16 pages, 11 figures, Accepted for publication in Astronomy and Astrophysics (2007)
Field-theoretic description of ionic crystallization in the restricted primitive model
Creators: name: Ciach, A.
name: Patsahan, O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Effects of charge-density fluctuations on a phase behavior of the restricted primitive model (RPM) are studied within a field-theoretic formalism. We focus on a $λ$-line of continuous transitions between charge-ordered and charge-disordered phases that is observed in several mean-field (MF) theories, but is absent in simulation results. In our study the RPM is reduced to a $ϕ^6$ theory, and a fluctuation contribution to a grand thermodynamic potential is obtained by generalizing the Brazovskii approach. We find that in a presence of fluctuations the $λ$-line disappears. Instead, a fluctuation-induced first-order transition to a charge-ordered phase appears in the same region of a phase diagram, where the liquid -- ionic-crystal transition is obtained in simulations. Our results indicate that the charge-ordered phase should be identified with an ionic crystal.
description: 31 pages, 10 figures
Ethical topicality of the ideal beauty
Creators: name: Chiodo, Simona
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2015

description: One of the most important reasons why beauty has been, is, and will possibly be exceedingly important for us is ethical at its core: by making us undergo the aesthetic experience of recognizing something ideal into something real, beauty can be the clearest symbol of our possibility, and even hope, of working on an ideal human measure, which means both the development of our identities as human beings and the development of more promising relationships between us, artifacts, and nature.
description: Lebenswelt. Aesthetics and philosophy of experience., No 6 (2015)
Pulsed characteristic-function measurement of a thermalizing harmonic oscillator
Creators: name: Betzholz, Ralf
name: Liu, Yu
name: Cai, Jianming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a method for the direct measurement of the Wigner characteristic function of a thermalizing harmonic oscillator that is completely inaccessible for control or measurement. The strategy employs a recently proposed probe-measurement-based scheme [Phys. Rev. Lett. 122, 110406 (2019)] which relies on the pulsed control of a two-level probe. We generalize this scheme to the case of a nonunitary time evolution of the target harmonic oscillator, describing its thermalization through contact to a finite-temperature environment, given in the form of a Lindblad master equation. This generalization is achieved using a superoperator formalism and yields analytical expressions for the direct measurement of the characteristic function, accounting for the decoherence during the measurement process.
description: 13 pages, 4 figures