cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The limits of cosmology: role of the Moon
Creators: name: Silk, Joseph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The lunar surface allows a unique way forward in cosmology, to go beyond current limits. The far side provides an unexcelled radio-quiet environment for probing the dark ages via 21 cm interferometry to seek elusive clues on the nature of the infinitesimal fluctuations that seeded galaxy formation. Far-infrared telescopes in cold and dark lunar polar craters will probe back to the first months of the Big Bang and study associated spectral distortions in the CMB. Optical and IR megatelescopes will image the first star clusters in the universe and seek biosignatures in the atmospheres of unprecedented numbers of nearby habitable zone exoplanets. The goals are compelling and a stable lunar platform will enable construction of telescopes that can access trillions of modes in the sky, providing the key to exploration of our cosmic origins.
description: 10 pages, 5 figures; to be published in 'Astronomy from the Moon: the next decades', theme issue of Philosophical Transactions of the Royal Society A
Recensione a L’impossibile perché - di Fulvio Papi
Creators: name: Madrussan, Elena
Publisher: name: Materiali di Estetica. Terza serie
Year: 2019

description: -
description: Materiali di Estetica. Terza serie, N. 6.1 (2019): Gillo Dorfles. L'estetica al plurale
Developing and Improving Risk Models using Machine-learning Based Algorithms
Creators: name: Wang, Yan
name: Ni, Xuelei Sherry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The objective of this study is to develop a good risk model for classifying business delinquency by simultaneously exploring several machine learning based methods including regularization, hyper-parameter optimization, and model ensembling algorithms. The rationale under the analyses is firstly to obtain good base binary classifiers (include Logistic Regression ($LR$), K-Nearest Neighbors ($KNN$), Decision Tree ($DT$), and Artificial Neural Networks ($ANN$)) via regularization and appropriate settings of hyper-parameters. Then two model ensembling algorithms including bagging and boosting are performed on the good base classifiers for further model improvement. The models are evaluated using accuracy, Area Under the Receiver Operating Characteristic Curve (AUC of ROC), recall, and F1 score via repeating 10-fold cross-validation 10 times. The results show the optimal base classifiers along with the hyper-parameter settings are $LR$ without regularization, $KNN$ by using 9 nearest neighbors, $DT$ by setting the maximum level of the tree to be 7, and $ANN$ with three hidden layers. Bagging on $KNN$ with $K$ valued 9 is the optimal model we can get for risk classification as it reaches the average accuracy, AUC, recall, and F1 score valued 0.90, 0.93, 0.82, and 0.89, respectively.
Βιώσιμη κινητικότητα σε αστικό περιβάλλον εφαρμογή στην περιοχή επέκτασης Πολίχνης του Δήμου Παύλου Μελά
Creators: name: Ζαφειρέλη, Σπυριδούλα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Βιώσιμη
Κινητικότητα
Πολίχνη
Sustainable
Mobility
Polichni

description: Η παρούσα διπλωματική εργασία διερευνά, περιγράφει και αξιολογεί την εξέλιξη της πολιτικής και τα μέτρα εφαρμογής της, για τη μετάβαση από τη μηχανοκίνητη μετακίνηση στη βιώσιμη αστική κινητικότητα οδηγούμενη από τις αρχές και τους στόχους της αστικής αειφορίας. Συγκεκριμένα, αναλύει τις παραμέτρους που υπεισέρχονται, τις πολιτικές που εφαρμόσθηκαν, παρουσιάζει παραδείγματα υλοποίησης Σχεδίων Βιώσιμης Αστικής Κινητικότητας, τέλος εξάγει συμπεράσματα της προόδου και των επιπτώσεων τους, για την ανάδειξη πρακτικών περαιτέρω βελτίωσης των συστημάτων. Για την ολοκλήρωση της ανάλυσης γίνεται η παρουσίαση των γενικών χαρακτηριστικών του Δήµου Παύλου Μελά και των στρατηγικών που εφαρμόσθηκαν τόσο στο παρελθόν όσο και σήµερα. Στη συνέχεια προτείνονται μέτρα ήπιας κυκλοφορίας χαμηλού κόστους για την ανάπτυξη βιώσιμων μέσων μετακίνησης, διαμορφώνοντας μια σύγχρονη αντίληψη του αστικού περιβάλλοντος προς όφελος της οδικής ασφάλειας. Η εργασία ολοκληρώνεται µε την εξαγωγή συμπερασμάτων τόσο σε επίπεδο Δήµου αλλά και ευρύτερα, όσον αφορά τη διαχείριση της κυκλοφορίας, την προώθηση εναλλακτικών τρόπων μετακίνησης αλλά και το πώς αυτό επηρεάζει τη βιώσιμη αστική κινητικότητα.
description: This paper explores, describes and evaluates the evolution of tactics and the measures applied for the transition from the mechanized transport to a viable city locomotion driven by the principles and goals of urban progress. Specifically, it analyzes the parameters involved, the policies applied, it presents implemented examples of viable city locomotion plans, it concludes on the progress and its effects so as to designate practices of further improvement of these systems. For the completion of this analysis, a presentation of the general characteristics of the municipality of Pavlos Melas is given and the strategies applied both in the past and in the present. Then, low cost traffic calming measures are suggested for the development of possible means of transport, creating a modern perception of urban environment in the interest of safety. The paper is completed with the presentation of conclusions on both a municipal level and a wider one as well, as far as traffic management is concerned, the promotion of alternative ways of transport and how this affects a viable urban locomotion mobility.
MOST Spacebased Photometry of the Transiting Exoplanet System HD 209458: Transit Timing to Search for Additional Planets
Creators: name: Miller-Ricci, E.
name: Rowe, J. F.
name: Sasselov, D.
name: Matthews, J. M.
name: Guenther, D. B.
name: Kuschnig, R.
name: Moffat, A. F. J
name: Rucinski, S. M.
name: Walker, G. A. H
name: Weiss, W. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the measurement of transit times for the HD 209458 planetary system from photometry obtained with the MOST (Microvariability & Oscillations of STars) space telescope. Deviations from a constant orbital period can indicate the presence of additional planets in the system that are yet undetected, potentially with masses approaching an Earth mass. The MOST data sets of HD 209458 from 2004 and 2005 represent unprecedented time coverage with nearly continuous observations spanning 14 and 43 days and monitoring 3 transits and 12 consecutive transits, respectively. The transit times we obtain show no variations on three scales: (a) no long-term change in P since before 2004 at the 25 ms level, (b) no trend in transit timings during the 2005 run, and (c) no individual transit timing deviations above 80 sec level. Together with previously published transit times from Agol & Steffen (2007), this allows us to place limits on the presence of additional close-in planets in the system, in some cases down to below an Earth mass. This result, along with previous radial velocity work, now eliminates the possibility that a perturbing planet could be responsible for the additional heat source needed to explain HD 209458b's anomalous low density.
description: 21 pages, 6 figures, accepted to the ApJ
Symmetry breaking of the bending mode of CO2 in the presence of Ar
Creators: name: Gartner, T. A.
name: Barclay, A. J.
name: McKellar, A. R. W.
name: Moazzen-Ahmadi, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The weak infrared spectrum of CO2-Ar corresponding to the (0111)
description: 19 pages, 1 table, and 3 figures
Introduzione a "Gillo Dorfles. L'estetica al plurale"
Creators: name: Mecacci, Andrea
Publisher: name: Materiali di Estetica. Terza serie
Year: 2019

description: -
description: Materiali di Estetica. Terza serie, N. 6.1 (2019): Gillo Dorfles. L'estetica al plurale
n-Channel Entropy-Constrained Multiple-Description Lattice Vector Quantization
Creators: name: Ostergaard, Jan
name: Jensen, Jesper
name: Heusdens, Richard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper we derive analytical expressions for the central and side quantizers which, under high-resolutions assumptions, minimize the expected distortion of a symmetric multiple-description lattice vector quantization (MD-LVQ) system subject to entropy constraints on the side descriptions for given packet-loss probabilities. We consider a special case of the general n-channel symmetric multiple-description problem where only a single parameter controls the redundancy tradeoffs between the central and the side distortions. Previous work on two-channel MD-LVQ showed that the distortions of the side quantizers can be expressed through the normalized second moment of a sphere. We show here that this is also the case for three-channel MD-LVQ. Furthermore, we conjecture that this is true for the general n-channel MD-LVQ. For given source, target rate and packet-loss probabilities we find the optimal number of descriptions and construct the MD-LVQ system that minimizes the expected distortion. We verify theoretical expressions by numerical simulations and show in a practical setup that significant performance improvements can be achieved over state-of-the-art two-channel MD-LVQ by using three-channel MD-LVQ.
description: 17 Pages, two-columns. Accepted for publication in IEEE Trans. on Inform. Th
Analytical modeling of micelle growth. 4. Molecular thermodynamics of wormlike micelles from ionic surfactants: theory vs. experiment
Creators: name: Danov, K. D.
name: Kralchevsky, P. A.
name: Stanimirova, R. D.
name: Stoyanov, S. D.
name: Cook, J. L.
name: Stott, I. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Hypotheses: The aggregation number and length of spherocylindrical (rodlike, wormlike) micelles in solutions of an ionic surfactant and salt can be predicted knowing the molecular parameters and the input concentrations of the species. This can be achieved by upgrading the quantitative molecular thermodynamic model from the previous parts of this series with an expression for the electrostatic component of micelle scission energy that is the excess free energy of the spherical endcaps with respect to the cylindrical part of the micelle. Theory: The thermodynamics of micellization is extended to the case of multicomponent system, which may contain several surfactants (both ionic and nonionic) and salts, taking into account the effect of counterion binding in the Stern layer on the micellar surface. Furthermore, the considerations are focused on a system that consists of single ionic surfactant plus salt. Findings: Excellent agreement was achieved between the theoretical model and experimental data for wormlike micelles from anionic and cationic surfactants at various concentrations of salt and temperatures. In accord with the experimental observations, at high salt concentrations, the model predicts loss of chemical equilibrium between the endcaps and cylindrical part of the wormlike micelles, which implies transition to self-assemblies of other, e.g. branched, morphology or the onset of crystallization and phase separation.
description: 52 pages, 9 figures; Supplementary Information: 23 pages, 4 figures
Symmetric set of transport coefficients for collisional magnetized plasma
Creators: name: Sadler, James D.
name: Walsh, Christopher A.
name: Li, Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In Braginskii extended magneto-hydrodynamics (ExMHD), applicable to collisional astrophysical and high energy density plasmas, the electric field and heat flow are described by the $α$, $β$ and $κ$ transport coefficients. We show that magnetic transport relies primarily on $β_\parallel-β_\perp$ and $α_\perp-α_\parallel$, rather than $α_\perp$ and $β_\perp$ themselves. However, commonly used coefficient fit functions [Epperlein and Haines, Phys. Fluids 29, 1029 (1986)] cannot accurately calculate these quantities. This means that many ExMHD simulations have significantly over-estimated the cross-gradient Nernst advection, resulting in artificial magnetic dissipation and discontinuities. We repeat the kinetic analysis to provide fits that rectify this problem. Use of these in the Gorgon ExMHD code resolves the known discrepancies with kinetic simulations in the literature. Recognizing the fundamental importance of $α_\perp-α_\parallel$ and $β_\parallel-β_\perp$, we re-cast the set of coefficients to find that each of them now shares the same underlying properties. This makes explicit the symmetry of the magnetic and thermal transport equations, as well as the symmetry of the coefficients themselves.
A String Field Theory based on Causal Dynamical Triangulations
Creators: name: Ambjorn, J.
name: Loll, R.
name: Watabiki, Y.
name: Westra, W.
name: Zohren, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We formulate the string field theory in zero-dimensional target space corresponding to the two-dimensional quantum gravity theory defined through Causal Dynamical Triangulations. This third quantization of the quantum gravity theory allows us in principle to calculate the transition amplitudes of processes in which the topology of space changes in time, and to include non-trivial topologies of space-time. We formulate the corresponding Dyson-Schwinger equations and illustrate how they can be solved iteratively.
description: 29 pages, 4 figures
Differences in experiences, aspirations and life chances between east side and west side Vancouver secondary graduates at mid-century
Creators: name: Nicol, Janet Mary
Publisher: name: University of British Columbia
Year: 2009

description: A history of growing up in Vancouver in the 1950s was constructed by interviewing eight former students of Vancouver Technical Secondary School in a working class neighborhood on the city's east side, and eight from Magee Secondary School in a middle class neighborhood on the west side. All 16 graduated from grade 12 in 1955. They responded to a general mailing obtained from reunion address lists. In their interviews, they discussed both their lives as adolescents and their life paths since graduation. The study reveals social class differences, in students' aspirations, their treatment in school and in their school-to-work transitions. Although post-war Vancouver's educational system provided composite schooling— vocational, commercial and academic training--in a l l neighborhoods, a class structure persisted. The study looks at the factors shaping these circumstances, including the social and political.landscape of the fifties, youths' perceptions of social class, part-time.employment and leisure activities. The study concludes by examining the role schools played in developing and reinforcing social class and gender roles.
Mutual Information Decay Curves and Hyper-Parameter Grid Search Design for Recurrent Neural Architectures
Creators: name: Mahalunkar, Abhijit
name: Kelleher, John D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We present an approach to design the grid searches for hyper-parameter optimization for recurrent neural architectures. The basis for this approach is the use of mutual information to analyze long distance dependencies (LDDs) within a dataset. We also report a set of experiments that demonstrate how using this approach, we obtain state-of-the-art results for DilatedRNNs across a range of benchmark datasets.
description: Published at the 27th International Conference on Neural Information Processing, ICONIP 2020, Bangkok, Thailand, November 18-22, 2020. arXiv admin note: text overlap with arXiv:1810.02966
MPEG Media Enablers For Richer XR Experiences
Creators: name: Thomas, Emmanuel
name: Potetsianakis, Emmanouil
name: Stockhammer, Thomas
name: Bouazizi, Imed
name: Champel, Mary-Luc
Publisher: name: arXiv
Year: 2020
Subjects: subject: Multimedia (cs.MM)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: I.3.2; H.5.1

description: With the advent of immersive media applications, the requirements for the representation and the consumption of such content has dramatically increased. The ever-increasing size of the media asset combined with the stringent motion-to-photon latency requirement makes the equation of a high quality of experience for XR streaming services difficult to solve. The MPEG-I standards aim at facilitating the wide deployment of immersive applications. This paper describes part 13, Video Decoding Interface, and part 14, Scene Description for MPEG Media of MPEG-I which address decoder management and the virtual scene composition, respectively. These new parts intend to make complex media rendering operations and hardware resources management hidden from the application, hence lowering the barrier for XR application to become mainstream and accessible to XR experience developers and designers. Both parts are expected to be published by ISO at the end of 2021.
Το Εθνικό Κτηματολόγιο και η προοπτική ολοκλήρωσής του, στην περιοχή της Θεσσαλονίκης:
Creators: name: Μαύρη, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Κτηματολόγιο
Θεσσαλονίκη
Ολοκλήρωση
Cadastre
Thessaloniki
Completion

description: Η καταγραφή των ιδιοκτησιών γης ήταν ένα θέμα που απασχόλησε τους ανθρώπους από αρχαιοτάτων χρόνων και τους οδήγησε στη λύση του κτηματολογίου. Το κτηματολόγιο λοιπόν έγινε το εργαλείο στα χέρια τους που τους οδήγησε στην καταγραφή τόσο της ιδιωτικής όσο και της κρατικής γης. Η διπλωματική αυτή εργασία με θέμα «Το Εθνικό Κτηματολόγιο και η προοπτική ολοκλήρωσής του, στην περιοχή της Θεσσαλονίκης» αναλύει το θεσμό του κτηματολογίου παραθέτοντας στοιχεία όσον αφορά την ιστορική του εξέλιξη, το νομικό του πλαίσιο, τη δομή και τη λειτουργία του καθώς και την έως τώρα πρόοδό και εξέλιξή του στον Ελλαδικό χώρο κάνοντας μια προσπάθεια προσέγγισης ιδιαίτερα στην περιοχή της Θεσσαλονίκης. Ποιο συγκεκριμένα το πρώτο κεφάλαιο αναφέρεται στην ιστορική του πορεία, το δεύτερο στο νομικό του πλαίσιο, το τρίτο στη δομή και τη λειτουργία του, το τέταρτο στην πρόοδό του έως σήμερα στην Ελλάδα και ειδικότερα στην περιοχή της Θεσσαλονίκης, το πέμπτο στη μετέπειτα εξέλιξη του και το έκτο στα συμπεράσματα που προέκυψαν μέσα από την εργασία.
description: The registration of land ownership was an issue that occupied people from ancient times and led them to the solution of the cadastre. The cadastre was a useful tool and led them to record in both private and state land. This diplomatic work on the subject “the National Cadastre and his prospect of completion, in the region of Thessalonica” analyze the institution of cadastre mentioning elements with regard to his historical development, his legal frame, the structure and his operation as well as until now progress and his development in the Hellenic space making a effort of approach particularly in the region of Thessalonica. Precisely the first chapter is concretely reported in his historical course, second in his legal frame, third in the structure and his operation, fourth in his progress until today in Greece and more specifically in the region of Thessalonica, fifth in his later development and sixth in the conclusions that resulted through the work.
Validation & optimisation of novel antagonists of MIF
Creators: name: Afrah Sattikar
Publisher: name: F1000Research
Year: 2015

description: We have generated biochemical and biophysical assay data providing validation for HTS hits and compounds emerging from a medicinal chemistry program. In-house chemistry efforts have provided novel chemical entities, which are being optimised to increase potency and improve ADMET properties. So far we have developed novel compounds with properties suitable for profiling in cellular assays relevant to MIF signalling.
Are High-pT Pions Suppressed in Pb+Pb Collisions at sqrt(sNN) = 17.3 GeV?
Creators: name: Reygers, Klaus
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Transverse momentum spectra of neutral pions in the range 0.7 < pT < 3.2 GeV/c have been measured at 2.3 < eta < 3.0 by the WA98 experiment in p+C and p+Pb collisions at sqrt(sNN) = 17.3 GeV. Scaled by the number of nucleon-nucleon collisions (Ncoll) the pi^0 yields in p+C and p+Pb at pT ~ 2.0 - 2.5 GeV/c are higher than the respective yields in central Pb+Pb collisions with Npart > 300. This observation is qualitatively consistent with expectations from parton energy loss.
description: 4 pages, 3 figures, To appear in the proceedings of the Quark Matter 2006 conference, Shanghai, China, 14-20 Nov 2006
Behavior of a Single-Atom Laser in the Sub-Poissonian Regime
Creators: name: Larionov, Nikolay
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In the present work the model of a single-atom laser generating in the regime when incoherent pumping rate coincides with the cavity decay rate is theoretically investigated. Using the stationary equation for the phase averaged Glauber P function the analytical expressions for mean number of photons and its dispersion are obtained. In the limiting case of the strong-coupling regime the exact expression for the photon number distribution function is found. Obtained results describe the sub-Poissonian photon statistics and show an increase in mean number of photons to non-zero value when the pump tends to zero.
The VLT-FLAMES Survey of Massive Stars: Stellar parameters and rotational velocities in NGC3293, NGC4755 and NGC6611
Creators: name: Dufton, P. L.
name: Smartt, S. J.
name: Lee, J. K.
name: Ryans, R. S. I.
name: Hunter, I.
name: Evans, C. J.
name: Herrero, A.
name: Trundle, C.
name: Lennon, D. J.
name: Irwin, M. J.
name: Kaufer, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: An analysis is presented of VLT-FLAMES spectroscopy for three Galactic clusters, NGC3293, NGC4755 and NGC6611. Non-LTE model atmosphere calculations have been used to estimate effective temperatures (from either the helium spectrum or the silicon ionization equilibrium) and gravities (from the hydrogen spectrum). Projected rotational velocities have been deduced from the helium spectrum (for fast and moderate rotators) or the metal line spectrum (for slow rotators). The observed Hertzsprung-Russell diagrams are compared with theoretical predictions and some discrepancies including differences in the main sequence luminosities are discussed. Cluster ages have been deduced and evidence for non-coeval star formation is found for all three of the clusters. Projected rotational velocities for targets in the older clusters, NGC3293 and NGC4755, have been found to be systematically larger than those for the field, confirming recent results in other similar age clusters. The distribution of projected rotational velocities are consistent with a Gaussian distribution of intrinsic rotational velocities. For the relatively unevolved targets in the older clusters, NGC3293 and NGC4755, the peak of the velocity distribution would be 250km/s with a full-width-half-maximum of approximately 180km/s. For NGC6611, the sample size is relatively small but implies a lower mean rotational velocity. This may be evidence for the spin-down effect due to angular momentum loss through stellar winds, although our results are consistent with those found for very young high mass stars. For all three clusters we deduce present day mass functions with Gamma-values in the range of -1.5 to -1.8, which are similar to other young stellar clusters in the Milky Way (Abridged).
description: To appear in A&A, version revised after referee's review
Seeing-limited imaging sky surveys -- small vs. large telescopes
Creators: name: Ofek, Eran O.
name: Ben-Ami, Sagi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: (Abridged) Typically large telescope construction and operation costs scale up faster than their collecting area. This slows scientific progress, making it expensive and complicated to increase telescope size. A metric that represents the capability of an imaging survey telescopes, and that captures a wide range of science objectives, is the telescope grasp -- the amount of volume of space in which a standard candle is detectable per unit time. We provide an analytic expression for the grasp, and also show that in the background-dominated noise limit, the optimal exposure time is three times the dead time. We introduce a related metric we call the information-content grasp, which summarizes the variance of all sources observed by the telescope per unit time. For seeing-dominated sky surveys, in terms of grasp, etendue, or collecting-area optimization, recent technological advancements make it more cost effective to construct multiple small telescopes rather than a single large telescope with a similar grasp or etendue. Among these key advancements are the availability of large-format back-side illuminated CMOS detectors with <4 micron pixels, well suited to sample standard seeing conditions given typical focal lengths of small fast telescopes. We also discuss the possible use of multiple small telescopes for spectroscopy. We argue that if all the obstacles to implementing cost-effective wide-field imaging and multi-object spectrographs using multiple small telescopes are removed, then the motivation to build new single large-aperture (>1m) visible-light telescopes which are seeing-dominated, will be weakened. These ideas have led to the concept of the, currently under construction, Large-Array Survey Telescope (LAST).
description: Accepted to PASP
Malaria diagnosis using a combined system of a simple and fast extraction method with a lyophilised Dual-LAMP assay in a non-endemic setting
Creators: name: Ramírez, Alexandra Martín
name: Argos, Lourdes Barón
name: Suárez, Marta Lanza
name: Rubio, Claudia Carmona
name: Pérez-Ayala, Ana
name: Hisam, Shamilah R.
name: Rubio, José M.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Biotechnology
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Malaria is a parasitic disease distributed in tropical areas but with a high number of imported cases in non-endemic countries. The most specific and sensitive malaria diagnostic methods are PCR and LAMP. However, both require specific equipment, extraction procedures and a cold chain. This study aims to solve some limitations of LAMP method with the optimization and validation of six LAMP assays, genus and species-specific, using an easy and fast extraction method, the incorporation of a reaction control assay, two ways (Dual) of result reading and reagent lyophilization. The Dual-LAMP assays were validated against the Nested-Multiplex Malaria PCR. A conventional column and saline extraction methods, and the use of lyophilized reaction tubes were also assessed. A new reaction control Dual-LAMP-RC assay was designed. Dual-LAMP-Pspp assay showed no cross-reactivity with other parasites, repeatability and reproducibility of 100%, a significant correlation between parasite concentration and time to amplification and a LoD of 1.22 parasites/µl and 5.82 parasites/µl using column and saline extraction methods, respectively. Sensitivity and specificity of the six Dual-LAMP assays reach values of 100% or close to this, being lower for the Dual-LAMP-Pm. The Dual-LAMP-RC assay worked as expected. Lyophilized Dual-LAMP results were concordant with the reference method. Dual-LAMP malaria assays with the addition of a new reaction control LAMP assay and the use of a fast and easy saline extraction method, provided low limit of detection, no cross-reactivity, and good sensitivity and specificity. Furthermore, the reagent lyophilization and the dual result reading allow their use in most settings.
"Scarcely yet a people": State policy in citizenship education, 1947-1982
Creators: name: Sears, Alan Murray
Publisher: name: University of British Columbia
Year: 2009

description: The constitutional division of powers in Canada assigns no authority to the federal state in the area of education. In spite of this, the Canadian state has used its constitutional authority to act in the national interest to justify substantial activity in public education at all levels. One area of particular interest to the state is the education of Canadian citizens. This thesis examines state policy in citizenship education between 1947 and 1982. It focuses on the Department of the Secretary of State, particularly the Canadian Citizenship Branch, and addresses three questions: 1) What conception of citizenship formed the basis for state policy in citizenship education? 2) How did the state formulate citizenship education policy? and 3) What means did the federal state use to implement citizenship education policy given that education is an area of provincial jurisdiction? Throughout this period the state was preoccupied with questions of national unity and therefore the focus of its policy in citizenship education was the construction and propagation of a national ideal in which all Canadians could find their identity as citizens. The policy was consistent with an elitist conception of citizenship in that it excluded most Canadians from the process of constructing the national identity and relegated citizen participation to largely apolitical voluntary activities. Although the Department of the Secretary of State was rhetorically committed to scientific policy making, the process was driven not by social science research but by attempts to secure and extend bureaucratic territory in relation to both other government departments and voluntary organizations working in the citizenship sector. In the complex interplay among the interested parties the Department was sometimes a leader and sometimes a follower in the policy making process. State citizenship education policy was implemented through official agreements with the provinces as well as more direct means which bypassed provincial authorities. Bilingualism in Education programs are the best example of the former, while training programs for teachers, the production and dissemination of materials, and attempts to use voluntary organizations as surrogates for the state are examples of the latter.
First bounds on the very high energy gamma-ray emission from Arp 220
Creators: name: al., J. Albert et
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the Major Atmospheric Gamma Imaging Cherenkov Telescope (MAGIC), we have observed the nearest ultra-luminous infrared galaxy Arp 220 for about 15 hours. No significant signal was detected within the dedicated amount of observation time. The first upper limits to the very high energy $γ$-ray flux of Arp 220 are herein reported and compared with theoretical expectations.
description: Accepted for publication in ApJ
thornado-hydro: a discontinuous Galerkin method for supernova hydrodynamics with nuclear equations of state
Creators: name: Pochik, David
name: Barker, Brandon L.
name: Endeve, Eirik
name: Buffaloe, Jesse
name: Dunham, Samuel J.
name: Roberts, Nick
name: Mezzacappa, Anthony
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: This paper describes algorithms for non-relativistic hydrodynamics in the toolkit for high-order neutrino radiation hydrodynamics (thornado), which is being developed for multiphysics simulations of core-collapse supernovae (CCSNe) and related problems with Runge-Kutta discontinuous Galerkin (RKDG) methods. More specifically, thornado employs a spectral type nodal collocation approximation, and we have extended limiters - a slope limiter to prevent non-physical oscillations and a bound-enforcing limiter to prevent non-physical states - from the standard RKDG framework to be able to accommodate a tabulated nuclear equation of state (EoS). To demonstrate the efficacy of the algorithms with a nuclear EoS, we first present numerical results from basic test problems in idealized settings in one and two spatial dimensions, employing Cartesian, spherical-polar, and cylindrical coordinates. Then, we apply the RKDG method to the problem of adiabatic collapse, shock formation, and shock propagation in spherical symmetry, initiated with a 15 solar mass progenitor. We find that the extended limiters improve the fidelity and robustness of the RKDG method in idealized settings. The bound-enforcing limiter improves robustness of the RKDG method in the adiabatic collapse application, while we find that slope limiting in characteristic fields is vulnerable to structures in the EoS - more specifically, in the phase transition from nuclei and nucleons to bulk nuclear matter. The success of these applications marks an important step toward applying RKDG methods to more realistic CCSN simulations with thornado in the future.
$ϕ$ and $Ω$ production in relativistic heavy ion collisions in a dynamical quark coalescence model
Creators: name: Chen, Lie-Wen
name: Ko, Che Ming
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Based on the phase-space information obtained from a multi-phase transport model within the string melting scenario for strange and antistrange quarks, we study the yields and transverse momentum spectra of $ϕ$ mesons and $Ω$ ($Ω^{-}+\barΩ^{+}$) baryons as well as their anisotropic flows in Au+Au collisions at RHIC using a dynamical quark coalescence model that includes the effect due to quark phase-space distributions inside hadrons. With current quark masses and fixing the $ϕ$ and $Ω$ radii from fitting measured yields, we first study the ratio of the yield of $Ω$ baryons to that of $ϕ$ mesons as well as their elliptic and fourth-order flows as functions of their transverse momentum. How the elliptic and fourth-order flows of $ϕ$ mesons and $Ω$ baryons are related to those of strange and antistrange quarks is then examined. The dependence of above results on $ϕ$ and $Ω$ radii as well as on the strange quark mass is also studied.
description: 15 pages, 18 figures, Title changed, revised version to appear in PRC
On the Kadomtsev-Petviashvili hierarchy in an extended class of formal pseudo-differential operators
Creators: name: Magnot, Jean-Pierre
name: Rubtsov, Vladimir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37K10, 37K20, 37K30

description: We study the existence and uniqueness of the Kadomtsev-Petviashvili (KP) hierarchy solutions in the algebra of $\F Cl(S^1,\K^n)$ of formal classical pseudo-differential operators. The classical algebra $ΨDO(S^1,\K^n)$ where the KP hierarchy is well-known appears as a subalgebra of $\F Cl(S^1,\K^n).$ We investigate algebraic properties of $\F Cl(S^1,\K^n)$ such as splittings, r-matrices, extension of the Gelfand-Dickii bracket, almost complex structures. Then, we prove the existence and uniqueness of the KP hierarchy solutions in $\F Cl(S^1,\K^n)$ with respect to extended classes of initial values. Finally, we extend this KP hierarchy to complex order formal pseudo-differential operators and we describe their Hamiltonian structures similarly to previously known formal case.
description: Accepted for publication in Theoretical and Mathematical Physics
Spin(1)Spin(2) Effects in the Motion of Inspiralling Compact Binaries at Third Order in the Post-Newtonian Expansion
Creators: name: Porto, Rafael A.
name: Rothstein, Ira Z.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use effective field theory techniques to compute the potentials due to spin-spin and spin-orbit effects, from which the spin(1)spin(2) contribution to the motion of spinning compact binaries to third Post-Newtonian (PN) order follow. We use a formalism which allows us to impose the spin supplementarity condition (SSC) in a canonical framework to all orders in the PN expansion. We explicitly show the equivalence with our previous results, obtained using the Newton-Wigner SSC at the level of the action for spin-spin and spin-orbit potentials reported in arXiv:gr-qc/0604099 and arXiv:0712.2032[gr-qc] respectively.
description: 31 pages, 3 figures. v4: All the irrelevant (spin-independent) terms in eqs (22) and (23) are now omitted, as in eqs (24) and (25), to avoid any possible confusion regarding the self-consistency of the tetrad ('ee=g'). The procedure and results in the paper are unaltered
Magnetospheric accretion-ejection processes in the classical T Tauri star AA
Creators: name: Bouvier, J.
name: Alencar, S. H. P.
name: Boutelier, T.
name: Dougados, C.
name: Balog, Z.
name: Grankin, K.
name: Hodgkin, S. T.
name: Ibrahimov, M. A.
name: Kun, M.
name: Magakian, T. Yu.
name: Pinte, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: From a long time series of high resolution (R=115,000) HARPS spectra and simultaneous broad-band photometry, we report new evidence for magnetospheric accretion as well as ejection processes in the nearly edge-on classical T Tauri star AA Tau. AA Tau's light curve is modulated with a period of 8.22d. The recurrent luminosity dips are due to the periodic occultation of the central star by the magnetically-warped inner disk edge located at about 9 Rstar. Balmer line profiles exhibit a clear rotational modulation of high-velocity redshifted absorption components with a period of 8.22 days as well, with a maximum strength when the main accretion funnel flow passes through the line of sight. At the same time, the luminosity of the system decreases by about 1 mag, indicative of circumstellar absorption of the stellar photosphere by the magnetically-warped, corotating inner disk edge. The photospheric and HeI radial velocities also exhibit periodic variations, and the veiling is modulated by the appearance of the accretion shock at the bottom of the accretion funnel. Diagnostics of hot winds and their temporal behaviour are also presented. The peculiar geometry of the young AA Tau system (nearly edge-on) allows us to uniquely probe the acretion-ejection region close to the star. We find that most spectral and photometric diagnostics vary as expected from models of magnetically-channelled accretion in young stars, with a large scale magnetosphere tilted by 20 deg onto the star's spin axis. We also find evidence for time variability of the magnetospheric accretion flow on a timescale of a few rotational periods.
description: 14 pages
A surrogate-based optimal likelihood function for the Bayesian calibration of catalytic recombination in atmospheric entry protection materials
Creators: name: del Val, Anabel
name: Maître, Olivier P. Le
name: Chazot, Olivier
name: Magin, Thierry E.
name: Congedo, Pietro M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Numerical Analysis (math.NA)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: This work deals with the inference of catalytic recombination parameters from plasma wind tunnel experiments for reusable thermal protection materials. One of the critical factors affecting the performance of such materials is the contribution to the heat flux of the exothermic recombination reactions at the vehicle surface. The main objective of this work is to develop a dedicated Bayesian framework that allows us to compare uncertain measurements with model predictions which depend on the catalytic parameter values. Our framework accounts for uncertainties involved in the model definition and incorporates all measured variables with their respective uncertainties. The physical model used for the estimation consists of a 1D boundary layer solver along the stagnation line. The chemical production term included in the surface mass balance depends on the catalytic recombination efficiency. As not all the different quantities needed to simulate a reacting boundary layer can be measured or known (such as the flow enthalpy at the inlet boundary), we propose an optimization procedure built on the construction of the likelihood function to determine their most likely values based on the available experimental data. This procedure avoids the need to introduce any a priori estimates on the nuisance quantities, namely, the boundary layer edge enthalpy, wall temperatures, static and dynamic pressures, which would entail the use of very wide priors. We substitute the optimal likelihood of the experimental data with a surrogate model to make the inference procedure both faster and more robust. We show that the resulting Bayesian formulation yields meaningful and accurate posterior distributions of the catalytic parameters with a reduction of more than 20% of the standard deviation with respect to previous works. We also study the implications of an extension of the experimental procedure.
Radiocarbon Databases Towards Interoperability: The Case of Mexico and the ArqueoData Project
Creators: name: Alcántara Chávez, Luis Alberto
Publisher: name: Zenodo
Year: 2024
Subjects: Archaeology
radio carbon dating

description: One of the major discussions in archaeology revolves around chronologies. This paper aims to present an overview of absolute dating databases in the web with radiocarbon results and discuss the information gap on Latin American archaeological dating, especially in Mexico. This paper will present some databases or datasets compilation projects in Latin America (AndesC14, BRC14, MesoRAD), Europe (p3k14c), and North America (CARD). The analysis of the information in these projects, allows us to identify the gap that exists in Mexico radiocarbon results in the web.

Likewise, a database proposal for Mexico will be presented: ArqueoData, and we will discuss on the interoperability opportunities offered by the creation of an Application Programming Interface (API) for effective communication between projects and databases. API allows us to discuss standardisation, controlled vocabularies, and similar ways for presenting information to ensure interoperability and bridging the gaps. Also considering the importance of the different contexts between Latin America (Global South) - Europe and North America (Global North).

Abstract taken from the EAA 2024 Abstract Book:

30th EAA Annual Meeting (Rome, Italy 2024) - Abstract Book Names, titles and affiliations are reproduced as submitted by the session organisers and/or authors. Language and wording of titles and abstracts were not revised. Technical editing: Sára Tylšová, Magda Karabáš (EAA) Design and layout: Sára Tylšová, Magda Karabáš (EAA) Design - cover: Symposia srl Design - logo: Caterina Amendola European Association of Archaeologists Rome, August 2024 © European Association of Archaeologists, 2024 ISBN 978-80-88441-08-3 30th EAA Annual Meeting (Rome, 2024)

https://www.e-a-a.org/EAA2024/scientificprogramme
Hiding Signatures of Gravitational Instability in Protoplanetary Discs with Planets
Creators: name: Rowther, Sahl
name: Meru, Farzana
name: Kennedy, Grant M.
name: Nealon, Rebecca
name: Pinte, Christophe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We carry out three dimensional SPH simulations to show that a migrating giant planet strongly suppresses the spiral structure in self-gravitating discs. We present mock ALMA continuum observations which show that in the absence of a planet, spiral arms due to gravitational instability are easily observed. Whereas in the presence of a giant planet, the spiral structures are suppressed by the migrating planet resulting in a largely axisymmetric disc with a ring and gap structure. Our modelling of the gas kinematics shows that the planet's presence could be inferred, for example, using optically thin 13C16O. Our results show that it is not necessary to limit the gas mass of discs by assuming high dust-to-gas mass ratios in order to explain a lack of spiral features that would otherwise be expected in high mass discs.
description: Accepted to ApJL. 9 pages, 5 figures
Impact of public health policy and mobility change on transmission potential of severe acute respiratory syndrome coronavirus 2 in Rhode Island, March 2020 – November 2021
Creators: name: Ogwara, Chigozie A.
name: Ronberg, Jennifer W.
name: Cox, Sierra M.
name: Wagner, Briana M.
name: Stotts, Jacqueline W.
name: Chowell, Gerardo
name: Spaulding, Anne C.
name: Fung, Isaac Chun-Hai
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: To study the SARS-CoV-2 transmission potential in Rhode Island (RI) and its association with policy changes and mobility changes, the time-varying reproduction number, Rt, was estimated. The daily incident case counts (16 March 2020, through 30 November 2021) were bootstrapped within a 15-day sliding window and multiplied by Poisson-distributed multipliers (λ = 4, sensitivity analysis: 11) to generate 1000 estimated infection counts, to which EpiEstim was applied to generate Rt time series. The median Rt percentage change when policies changed was estimated. The time lag correlations were assessed between the 7-day moving average of the relative changes in Google mobility data in the first 90 days, and Rt and estimated infection count, respectively. There were three major pandemic waves in RI in 2020–2021: spring 2020, winter 2020–2021 and fall-winter 2021. The median Rt fluctuated within the range of 0.5–2 from April 2020 to November 2021. Mask mandate (18 April 2020) was associated with a decrease in Rt (−25.99%, 95% CrI: −37.42%, −14.30%). Termination of mask mandates on 6 July 2021 was associated with an increase in Rt (36.74%, 95% CrI: 27.20%, 49.13%). Positive correlations were found between changes in grocery and pharmacy, Rt retail and recreation, transit, and workplace visits, for both Rt and estimated infection count, respectively. Negative correlations were found between changes in residential area visits for both Rt and estimated infection count, respectively. Public health policies enacted in RI were associated with changes in the pandemic trajectory. This ecological study provides further evidence of how non-pharmaceutical interventions and vaccination slowed COVID-19 transmission in RI.