cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Helioseismic Observations and Modeling of Solar Dynamo
Creators: name: Kosovichev, Alexander G.
name: Getling, Alexander V.
name: Pipin, Valery V.
Publisher: name: Zenodo
Year: 2021
Subjects: solar activity cycles
helioseismology
dynamo modeling

description: Helioseismological observations of the internal dynamics of the Sun during the last two solar activity cycles make it possible to trace the development of solar dynamo processes throughout the depth of the convective zone and to link them with models of solar cycles. Observational data obtained from the SoHO (1996-2010) and SDO (2010-2020) spacecraft represent measurements of the internal differential rotation, meridional circulation, and thermodynamic parameters. The structure and dynamics of zonal and meridional plasma flows reveal the processes of generation and transfer of magnetic fields inside the Sun. The data analysis shows that active latitudes and regions of a strong polar field on the Sun's surface coincide with regions of deceleration of zonal currents ("torsional oscillations"). The observed structure of zonal flows and their latitudinal and radial migration in deep layers of the convective zone correspond to dynamo waves predicted by dynamo theories and numerical MHD models. The data indicate that the development of a new solar cycle begins at about 60 degrees latitude at the base of the convective zone during the maximum of the previous cycle. Then, the process of magnetic field migration to the Sun's surface is divided into two branches: fast (in 1-2 years) migration in the high-latitude zone and slow migration at middle and low latitudes for ~ 10 years. The subsurface rotational shear layer ("leptocline") plays a key role in the formation of the magnetic "butterfly diagram". Both the zonal flows (“torsional oscillations”) and the meridional circulation reveal the 22-year pattern of the "extended" solar cycle, initially discovered from observations of Doppler velocities and the structure of the solar corona. A self-consistent MHD model of the solar dynamo developed in the mean-field theory framework is in good qualitative and quantitative agreement with the helioseismic observations. The model shows that the observed variations of the solar dynamics are associated with a magnetic field effect on convective heat transfer and the corresponding modulation of the meridional circulation. The model explains why the solar minimum polar field predicts the next sunspot maximum and points to new possibilities for predicting solar cycles from helioseismological data.
Clim4Vitis Staff Exchange, Florence - 12 July 2019
Creators: name: Argenti, Giovanni
name: Sacchetti, Patrizia
name: Dalla Marta, Anna
name: Fraga, Helder
name: Fabbrizzi, Sara
name: Capecchi, Irene
name: Staglianò, Nicolina
name: Bagnoli, Bruno
name: Rosi, Marzia Cristiana
name: Belcari, Antonio
name: Mancini, Marco
name: Orlandini, Simone
name: Grifoni, Daniele
name: Messeri, Gianni
name: Baldi, Marina
name: Dalu, Giovanni
name: Salinger, Michael James
name: Santos, Joao
name: Barbierato, Elena
name: Bernetti, Iacopo
name: Cipollaro, Maria
name: Menghini, Silvio
name: Sacchelli, Sandro
Publisher: name: Zenodo
Year: 2019
Subjects: Viticulture
Climate change
Knowledge transfer

description: The staff exchange event provides an effective knowledge transfer among Clim4Vitis partners. The speakers address viticulture topics from different points of view, providing a general focus on the state of art and current research activities in this sector. This event promotes exchanges of methodologies and best practices among partners.
Diving inside a hairy black hole
Creators: name: Grandi, Nicolás
name: Landea, Ignacio Salazar
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the interior of the Einstein-Gauss-Bonnet charged black-hole with scalar hair. We find a variety of dynamical epochs, with the particular important feature that the Cauchy horizon is not present. This makes the violation of the no-hair theorem a possible tool to understand how might the strong cosmic censorship conjecture work.
description: 22 pages, 7 figures, accepted to JHEP
Centrifugal Breakout around a Young M Dwarf
Creators: name: Palumbo, Elsa
name: Montet, Benjamin T.
name: Feinstein, Adina D.
name: Bouma, Luke
name: Hartman, Joel
name: Gully-Santiago, Michael
name: Abrahams, Ellianna S.
Publisher: name: Zenodo
Year: 2021
Subjects: Young stars, magnetic fields, M dwarf stars, stellar winds, stellar coronal mass ejections, stellar flares

description: Magnetospheric clouds, plasma that accumulates in dense clumps at a star's corotation radius, have been proposed as an explanation for depth-varying dips in the light curves of young stars such as 𝜎 Ori E and RIK-210. However, the stellar theory that first predicted magnetospheric clouds also anticipated an associated mass-loss mechanism known as centrifugal breakout for which there has been limited empirical evidence. Based on data from TESS, Gaia, LCO, ASAS-SN, and Veloce, we propose that TIC 234284556, a 45-million-year-old M3.5 star, is a candidate for a direct detection of centrifugal breakout. To assess this hypothesis, we examine the changes in the dip parameters over three sectors of TESS data, analyze rotational amplitudes and optical flaring as a proxy for magnetic activity, and interpret the presence of an anomalous brightening event that precedes the disappearance of the dip. We then consider TIC 234284556 in the context of other young stars. Finally, we consider possible mass-accumulation mechanisms and discuss how future observations may help us constrain M dwarfs’ wind mass loss rates or give us valuable data about extra-solar CMEs.
description: {"references": ["Stauffer et al. (2017) https://iopscience.iop.org/article/10.3847/1538-3881/aa5eb9#ajaa5eb9s6", "Townsend and Owocki (2005) https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2966.2005.08642.x", "Townsend et al. (2013) https://iopscience.iop.org/article/10.1088/0004-637X/769/1/33", "Jardine and Collier Cameron (2018) https://academic.oup.com/mnras/article-abstract/482/3/2853/5144223?redirectedFrom=fulltext"]}
Improving Photovoltaics with High Luminescence Efficiency Quantum Dot Layers
Creators: name: Chen, James
name: Gagner, DJ
name: Griffiths, Kevin
name: Hitz, Emily
name: Horiguchi, Akira
name: Joyce, Ryan
name: Kim, Byung Yub
name: Lee, Michael
name: Lee, Seongwoo
name: Raul, Alex
name: Shyu, DoRonne
name: Siegel, Zachary
name: Silberholz, Steven
name: Tran, Douglas
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: Solar cell efficiency
Quantum dots
Gemstone Team QUANTUM SEA

description: A solar cell relies on its ability to turn photons into current. Because short wavelength photons
are typically absorbed near the top surface of a cell, the generated charge carriers recombine
before being collected. But when a layer of quantum dots (nanoscale semiconductor particles) is
placed on top of the cell, it absorbs short wavelength photons and emits them into the cell at
longer wavelengths, which enables more efficient carrier collection. However, the resulting
power conversion efficiency of the system depends critically on the quantum dot luminescence
efficiency – the nature of this relationship was previously unknown. Our calculations suggest
that a quantum dot layer must have high luminescence efficiency (at least 80%) to improve the
current output of existing photovoltaic (PV) cells; otherwise, it may worsen the cell’s efficiency.
Our quantum dot layer (using quantum dots with over 85% quantum yield) slightly reduced the
efficiency of our PV cells. We observed a decrease in short circuit current of a commercial-grade
cell from 0.1977 A to 0.1826 A, a 7.6% drop, suggesting that improved optical coupling from the
quantum dot emission into the solar cell is needed. With better optical coupling, we predict
current enhancements between ~6% and ~8% for a solar cell that already has an antireflection
coating. Such improvements could have important commercial impacts if the coating could be
deployed in a scalable fashion.
Διδακτική ανάλυση εγχειριδίου: Θρησκευτικά Α' Γυμνασίου
Creators: name: Stogiannidis, Athanasios
name: Karapistolis, Dimitrios
name: Koutsoupias, Nikos
Publisher: name: Zenodo
Year: 2015

description: Με την παρούσα εργασία διερευνούμε διδακτικά τις ενότητες 8, 9, 10 και 11 από τοσχολικό εγχειρίδιο που χρησιμοποιείται σήμερα στην Ελλάδα για το μάθημα τωνΘρησκευτικών στην Α’ Γυμνασίου. Οι τέσσερις αυτές διδακτικές ενότητες συνιστούν τοπεριεχόμενο του β’ κεφαλαίου από το παραπάνω σχολικό εγχειρίδιο, το οποίο έχει τοντίτλο «Η Έξοδος. Ο Θεός ελευθερώνει το λαό και τον καθοδηγεί.» Ως εκ τούτου, οι τέσσεριςαυτές ενότητες επιλέχθηκαν διότι εντάσσονται στο πλαίσιο της ίδιας θεματικής.Τα δεδομένα μας προέρχονται από τις εργασίες και τις ερωτήσεις που υπάρχουν στοτέλος κάθε ενότητας. Για την πραγμάτωση του σκοπού μας εφαρμόζουμε την ΠΑ και στησυνεχεία με βάση ευκλείδεια μετρική σχηματίζουμε πινάκα αποστάσεων μεταβλητώνΔιδακτικής Ταξονομίας και αντικειμένων.Με την εφαρμογή της μεθόδου αυτής στις παραπάνω διδακτικές ενότητες, επιχειρούμενα αναλύσουμε τον τρόπο με τον οποίον χρησιμοποιούνται και συνδυάζονται μεταξύ τουςεπίπεδα μάθησης και είδη δεξιοτήτων σε διδακτικές ενότητες που έχουν έναν κοινόθεματικό προσανατολισμό. Το αποτέλεσμα της ανάλυσης αυτής ενέχει διδακτικόενδιαφέρον, διότι μας οδηγεί στην εξαγωγή συμπερασμάτων αναφορικά με τη διδακτικήκαταλληλότητα ή όχι του υπό διερεύνηση σχολικού εγχειριδίου.

 

8ο Πανελλήνιο Συνέδριο Ανάλυσης Δεδομένων με Διεθνή Συμμετοχή, Αλεξανδρούπολη 2015

Τομος Περιλήψεων
Identification of the OGLE-2003-BLG-235/MOA-2003-BLG-53 Planetary Host Star
Creators: name: Bennett, David P.
name: Anderson, Jay
name: Bond, Ian A.
name: Udalski, Andrzej
name: Gould, Andrew
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of HST observations of the host star for the first definitive extrasolar planet detected by microlensing. The light curve model for this event predicts that the lens star should be separated from the source star by ~6mas at the time of the HST images. If the lens star is a late G, K or early M dwarf, then it will be visible in the HST images as an additional source of light that is blended with the source image. Unless the lens and source have exactly the same colors, its presence will also be revealed by a systematic shift between centroids of the source plus lens in different filter bands. The HST data indicates both of these effects: the HST source that matches the position of the source star is 0.21 magnitudes brighter in the ACS/HRC-F814W filter than the microlensing model predicts, and there is an offset of ~0.7mas between the centroid of this source in the F814W and F435W filter bands. We conclude the planetary host star has been detected in these HST images, and this identification of the lens star enables a complete solution of the lens system. The lens parameters are determined with a Bayesian analysis, averaging over uncertainties in the measured parameters, interstellar extinction, and allowing for the possibility of a binary companion to the source star. This yields a stellar mass of M_* = 0.63(+0.07/-0.09) M_solar and a planet mass of M_p = 2.6 (+0.8/-0.6) M_Jup at an orbital separation of 4.3 (+2.5/-0.8) AU. Thus, the lens system resembles our own Solar System, with a planet of ~3 Jupiter-masses in a Jupiter-like orbit around a star of two-thirds of a Solar mass. These conclusions can be tested with future HST images, which should reveal a broadening of the blended source-plus-lens point spread function due to the relative lens-source proper motion.
description: 11 pages, with 3 figures. to appear in ApJ Lett (Aug 20 issue)
MECI: A Method for Eclipsing Component Identification
Creators: name: Devor, Jonathan
name: Charbonneau, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe an automated method for assigning the most probable physical parameters to the components of an eclipsing binary, using only its photometric light curve and combined colors. With traditional methods, one attempts to optimize a multi-parameter model over many iterations, so as to minimize the chi-squared value. We suggest an alternative method, where one selects pairs of coeval stars from a set of theoretical stellar models, and compares their simulated light curves and combined colors with the observations. This approach greatly reduces the parameter space over which one needs to search, and allows one to estimate the components' masses, radii and absolute magnitudes, without spectroscopic data. We have implemented this method in an automated program using published theoretical isochrones and limb-darkening coefficients. Since it is easy to automate, this method lends itself to systematic analyses of datasets consisting of photometric time series of large numbers of stars, such as those produced by OGLE, MACHO, TrES, HAT, and many others surveys.
description: 25 pages, 7 figures, accepted for publication in ApJ
Η κατασκευή της συμπερίληψης των παιδιών προσφύγων στον λόγο των εκπαιδευτικών
Creators: name: Κωστίδου-Τριανταφυλλίδου, Αναστασία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Προσχολική εκπαίδευση
Παιδιά-πρόσφυγες
Συμπεριληπτική εκπαίδευση
Pre-school education
Refugee children
Inclusive education

description: Η παρούσα εργασία πραγματεύεται το θέμα της συμπερίληψης παιδιών-προσφύγων στο τυπικό εκπαιδευτικό σύστημα μέσα από τις αντιλήψεις εκπαιδευτικών Προσχολικής Εκπαίδευσης, όπως εκφράζονται στον «λόγο» τους, με την έννοια της κοινωνικής πράξης σε συνθήκες επικοινωνίας. Συγκεκριμένα, επικεντρώνει στους τρόπους με τους οποίους οι εκπαιδευτικοί Προσχολικής Εκπαίδευσης προσλαμβάνουν και νοηματοδοτούν την ένταξη των παιδιών-προσφύγων στα Νηπιαγωγεία, ως «διαφορετικών» αλλά ισότιμων μελών της σχολικής κοινότητας και τις πρακτικές τις οποίες χρησιμοποιούν για να «διδάξουν» όλα τα παιδιά. Σκοπός της είναι, σ’ ένα πρώτο επίπεδο, να συμβάλει στην ευαισθητοποίηση των εκπαιδευτικών όσον αφορά στις ιδιαίτερες εκπαιδευτικές και κοινωνικές ανάγκες των παιδιών-προσφύγων και σ’ ένα δεύτερο, να ενισχύσει (κατά το δυνατόν) με τα ευρήματά της το αίτημα για διαμόρφωση αυθεντικής εκπαιδευτικής συμπερίληψής τους στα «κανονικά» σχολεία μέσω του σχεδιασμού και της εφαρμογής θεσμοθετημένων προγραμμάτων συνεκπαίδευσης, αλλά και επιμόρφωσης των εκπαιδευτικών.
description: The present essay addresses the matter of the inclusion of refugee children in the typical educational system through the perspectives of teachers of Pre-school Education, as they are expressed on their "discourse", within the meaning of social action in communication circumstances. In particular, the essay concentrates on the way teachers of Pre-school education perceive and define the integration of refugee children in Pre- School Education as "different" yet equal members of the school community and the methods they use to "teach" all children. Ιts purpose is, on the first level, to contribute to the awareness-raising on the particular needs of refugee children and on a second level to enhance (as far as possible) the formulating of educational authentic integration in "formal" schools through planning and implementation of institutionalised programs of coeducation and teachers’ training.
Information and thermodynamics: fast and precise approach to Landauer's bound in an underdamped micro-mechanical oscillator
Creators: name: Dago, Salambô
name: Pereda, Jorge
name: Barros, Nicolas
name: Ciliberto, Sergio
name: Bellon, Ludovic
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Landauer principle states that at least $k_B T \ln 2$ of energy is required to erase a 1-bit memory, with $k_B T$ the thermal energy of the system. We study the effects of inertia on this bound using as one-bit memory an underdamped micro-mechanical oscillator confined in a double-well potential created by a feedback loop. The potential barrier is precisely tunable in the few $k_B T$ range. We measure, within the stochastic thermodynamic framework, the work and the heat of the erasure protocol. We demonstrate experimentally and theoretically that, in this underdamped system, the Landauer bound is reached with a 1 % uncertainty, with protocols as short as 100 ms.
Από τη λογοτεχνία στο θέατρο για ανηλίκους: Διασκευαστικές στρατηγικές και ιδεολογία
Creators: name: Μανάργια, Ευθυμία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Θέατρο για ανηλίκους
Ιδεολογία
Διασκευή
Children’s Theatre
Ideology
Adaptation

description: Η παρούσα εργασία επιχειρεί να μελετήσει τους τρόπους με τους οποίους διασκευάζεται ένα θεατρικό έργο ενηλίκων σε θεατρικό έργο που απευθύνεται σε παιδικό και νεανικό κοινό. Στο πρώτο κεφάλαιο εξετάζεται το θεωρητικό πλαίσιο, σημαντικές έννοιες που σχετίζονται με το θέμα. Στο δεύτερο κεφάλαιο πραγματοποιείται η συγκριτική ανάλυση των βασικών αξόνων, δομής και περιεχομένου, των πρωτότυπων έργων με τις διασκευές και σημειώθηκαν παρατηρήσεις σχετικά με τις μετατροπές που δέχθηκε το αρχικό κείμενο ώστε να προσαρμοστεί στο ανήλικο κοινό. Το δείγμα της έρευνας αποτέλεσαν οι τρεις διασκευές του Γιάννη Καλατζόπουλου, το Όνειρο Καλοκαιρινής Νύχτας, Η Σολομώντεια Λύση και Η χώρα των πουλιών. Ακολουθούν συμπεράσματα και η καταγραφή των παραστάσεων των έξι πιο σημαντικών παιδικών σκηνών της Θεσσαλονίκης.
description: This paper attempt to examine the ways in which a theatrical play for adults is being adapt in order to address to children and youths. The first chapter, examines the theoretical terms related to the subject. On the second chapter, the adaptive plays are seen comparatively to the original ones, considering structure and context and notes have been taken on how the original play have been changed in order to adjust to the young audience. The sample of the study composed of three adaptation of Yannis Kalatzopoylos, the Midsummer Night’s Dream, The Solomon’s Judgment and The land of birds. The paper is completed with conclusions about the analysis and the listing of the plays of the six most important theatrical stages for children in Thessaloniki.
The SCUBA HAlf Degree Extragalactic Survey (SHADES) - III. Identification of radio and mid-infrared counterparts to submillimetre galaxies
Creators: name: Ivison, R. J.
name: Greve, T. R.
name: Dunlop, J. S.
name: Peacock, J. A.
name: Egami, E.
name: Smail, Ian
name: Ibar, E.
name: van Kampen, E.
name: Aretxaga, I.
name: Babbedge, T.
name: Biggs, A. D.
name: Blain, A. W.
name: Chapman, S. C.
name: Clements, D. L.
name: Coppin, K.
name: Farrah, D.
name: Halpern, M.
name: Hughes, D. H.
name: Jarvis, M. J.
name: Jenness, T.
name: Jones, J. R.
name: Mortier, A. M. J.
name: Oliver, S.
name: Papovich, C.
name: Perez-Gonzalez, P. G.
name: Pope, A.
name: Rawlings, S.
name: Rieke, G. H.
name: Rowan-Robinson, M.
name: Savage, R. S.
name: Scott, D.
name: Seigar, M.
name: Serjeant, S.
name: Simpson, C.
name: Stevens, J. A.
name: Vaccari, M.
name: Wagg, J.
name: Willott, C. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Determining an accurate position for a submm galaxy (SMG) is the crucial step that enables us to move from the basic properties of an SMG sample - source counts and 2-D clustering - to an assessment of their detailed, multi-wavelength properties, their contribution to the history of cosmic star formation and their links with present-day galaxy populations. In this paper, we identify robust radio and/or IR counterparts, and hence accurate positions, for over two thirds of the SCUBA HAlf-Degree Extragalactic Survey (SHADES) Source Catalogue, presenting optical, 24-um and radio images of each SMG. Observed trends in identification rate have given no strong rationale for pruning the sample. Uncertainties in submm position are found to be consistent with theoretical expectations, with no evidence for significant additional sources of error. Employing the submm/radio redshift indicator, via a parameterisation appropriate for radio-identified SMGs with spectroscopic redshifts, yields a median redshift of 2.8 for the radio-identified subset of SHADES, somewhat higher than the median spectroscopic redshift. We present a diagnostic colour-colour plot, exploiting Spitzer photometry, in which we identify regions commensurate with SMGs at very high redshift. Finally, we find that significantly more SMGs have multiple robust counterparts than would be expected by chance, indicative of physical associations. These multiple systems are most common amongst the brightest SMGs and are typically separated by 2-6", or 15-50/(sin i) kpc at z ~ 2, consistent with early bursts seen in merger simulations.
description: Accepted for MNRAS. 30 pages; 8 b&w figures; 1 colour figure; Appendix with 10 pages of b&w postage-stamp images. Full-resolution versions available at http://www.roe.ac.uk/~rji/shades3-ivison.pdf (PDF), http://www.roe.ac.uk/~rji/shades3-ivison-a4.ps.gz (PS-A4) or http://www.roe.ac.uk/~rji/shades3-ivison-us.ps.gz (PS-Letter)
Assembly bias in quadratic bias parameters of dark matter halos from forward modeling
Creators: name: Lazeyras, Titouan
name: Barreira, Alexandre
name: Schmidt, Fabian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use the forward modeling approach to galaxy clustering combined with the likelihood from the effective-field theory of large-scale structure to measure assembly bias, i.e. the dependence of halo bias on properties beyond the total mass, in the linear ($b_1$) and second order bias parameters ($b_2$ and $b_{K^2}$) of dark matter halos in $N$-body simulations. This is the first time that assembly bias in the tidal bias parameter $b_{K^2}$ is measured. We focus on three standard halo properties: the concentration $c$, spin $λ$, and sphericity $s$, for which we find an assembly bias signal in $b_{K^2}$ that is opposite to that in $b_1$. Specifically, at fixed mass, halos that get more (less) positively biased in $b_1$, get less (more) negatively biased in $b_{K^2}$. We also investigate the impact of assembly bias on the $b_2(b_1)$ and $b_{K^2}(b_1)$ relations, and find that while the $b_2(b_1)$ relation stays roughly unchanged, assembly bias strongly impacts the $b_{K^2}(b_1)$ relation. This impact likely extends also to the corresponding relation for galaxies, which motivates future studies to design better priors on $b_{K^2}(b_1)$ for use in cosmological constraints from galaxy clustering data.
description: 22 pages, 5 figures ; v2: version published in JCAP
Including Mg I IR (<72000 Å) lines in solar and stellar models
Creators: name: Peralta, Juan I.
name: Vieytes, Mariela C.
name: Mendez, Alejandra M. P.
name: Mitnik, Darío
Publisher: name: Zenodo
Year: 2021
Subjects: The Sun and the Heliosphere
Stellar Atmospheres
Mg I
Collision With Electrons
Stars with planets

description: Considering the imminent launch of the James Webb Space Telescope with IR spectroscopy capabilities, our ability of calculating reliable synthetic stellar spectra in this spectral range must be improved. An important species with strong features in the spectra of late-type stars is the neutral Mg. In the present work we have improved our previous Mg I atomic model adding 128 strong transitions (log(g f)>−1), up to 72000 A, and updated several atomic parameters. One of the most important changes is our innovative treatment of the Effective Collision Strengths (ECS) parameters, which describe excitation by collision with electrons. We employed the latest R-matrix computations by Barklem et al. (2017) up to level 25. For transitions involving levels between 26 and 54, we compared the influence in the spectrum of two different sets of ECS parameters: the widely used combination of Seaton (1962) (allowed transitions) plus van Regemorter (1962) (forbidden transitions) formulas, and new ECS obtained in this work using the multi–configuration Breit–Pauli distorted–wave (DW) method. We found an overall better agreement between observed and synthetic IR spectral lines when the combination R-matrix and the new DW calculations for the ECS were used. This result opens the possibility of a new and more reliable approach than the formulas of Seaton and van Regemorter (1962) as methods of calculating ECS for Mg I and other species in the stellar atmospheres, when the R-matrix method is not available.
description: {"references": ["Barkelm et al. 2017, A&A 606, A11", "Seaton, M.J. 1962, Proceedings of the Physical Society, 79, 1105", "van Regemorter, H. 1962, ApJ, 136, 906", "Fontenla et al. 2015, ApJ 809, 157", "Kramida, et al. 2020, NIST Atomic Spectra Database (ver. 5.7.1)", "VALD database. Kupka, F. G., Ryabchikova, T. A., Piskunov, N. E., Stempels, H. C., & Weiss,W. W. 2000, Baltic Astronomy, 9, 590", "Kurucz, R. L. & Bell, B. 1995, Atomic Line Data, Kurucz CD-ROM No.23., [Online; accessed: 2020, October 27]", "TOPbase Database. Cunto, et al. 1993, A&A, 275, L5", "ACE-FTS Solar Atlas. Hase, F., Wallace, L., McLeod, S., Harrison, J., & Bernath, P. 2010, Journal of Quantitative Spectroscopy and Radiative Transfer, 111, 521"]}
Arqueologia do saber da produção científica e acadêmica sobre Drag Queens no Brasil
Creators: name: Bezerra, Pedro Henrique Almeida
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 441010
subject: Sociology of gender

description: O texto aborda a produção científica e acadêmica sobre drag queens no Brasil, questionando quais são os determinantes dessa produção nos últimos 22 anos (2000 a 2022). A pesquisa teve como objetivo mapear, sistematizar e analisar a quantidade de trabalhos acadêmicos, como artigos, monografias, dissertações e teses sobre o tema, além de estabelecer um panorama da literatura nacional. A metodologia foi qualitativa, utilizando também elementos quantitativos, por meio de pesquisa documental e bibliográfica, com ênfase na arqueologia do saber de Michel Foucault, visando entender como o conhecimento sobre a temática foi moldado e construído. Os resultados indicam um crescimento do interesse pela temática, com um aumento significativo das publicações entre 2017 e 2020. A produção científica se destaca por uma abordagem interdisciplinar, atravessando áreas como comunicação, antropologia, psicologia e sociologia. O estudo classificou os autores em três grupos: os que veem a drag queen como uma potência de tensionamento do gênero, aqueles que exploram as subjetividades nas margens do discurso e um terceiro grupo que analisa a drag como parte da identidade teatral e cultural. Na conclusão, o autor enfatiza a importância de reconhecer o crescente interesse nos estudos sobre performance drag, além de valorizar as contribuições acadêmicas ao longo dos anos. O levantamento realizado serve como referência para pesquisadores na área e reflete a complexidade do universo drag no contexto brasileiro.
Importance of convection for emerging active regions on the Sun
Creators: name: Schunker, Hannah
Publisher: name: Zenodo
Year: 2021
Subjects: The Sun and Heliosphere

description: The emergence of magnetic field from the interior of the Sun generates a poloidal magnetic field from rising toroidal magnetic field. Solar active regions and sunspots are the strongest concentrations of magnetic field on the surface, and how they emerge is a crucial, but poorly understood aspect of the solar dynamo. Only since the advent of the SDO/HMI monitoring campaign has it been possible to capture the emergence process of hundreds of active regions in observations of the magnetic field, Doppler velocity and intensity continuum. By measuring the average motion of the polarities, the average surface velocities and average supergranulation pattern it is clear that convection plays an important role in the emergence process in the Sun. In order to broadly understand the dynamo mechanism, we need to understand the relationship between convection and the surface magnetic field structure on other Sun-like stars.
Lifshitz-like transition and enhancement of correlations in a rotating bosonic ring lattice
Creators: name: Rey, Ana Maria
name: Burnett, Keith
name: Satija, Indubala I.
name: Clark, Charles W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the effects of rotation on one-dimensional ultra-cold bosons confined to a ring lattice. For commensurate systems, at a critical value of the rotation frequency, an infinitesimal interatomic interaction energy opens a gap in the excitation spectrum, fragments the ground state into a macroscopic superposition of two states with different circulation and generates a sudden change in the topology of the momentum distribution. These features are reminiscent of the topological changes in the Fermi surface that occurs in the Lifshitz transition in fermionic systems. The entangled nature of the ground state induces a strong enhancement of quantum correlations and decreases the threshold for the Mott insulator transition. In contrast to the commensurate case, the incommensurate lattice is rather insensitive to rotation. Our studies demonstrate the utility of noise correlations as a tool for identifying new physics in strongly correlated systems.
description: 5 pages, 4 figures
Νίκος Καζαντζάκης: Ο Φρειδερίκος Νίτσε εν τη φιλοσοφία του δικαίου και της πολιτείας. Μία κριτική παρουσίαση
Creators: name: Γεωργοπούλου, Ελισάβετ Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Νίκος Καζαντζάκης
Φρειδερίκος Νίτσε
Μία κριτική παρουσίαση της διατριβής
Nikos Kazantzakis
Friedrich Nietzsche
Α dissertation’s critical presentation

description: Η παρούσα διπλωματική εργασία επιχειρεί μια κριτική παρουσίαση της διατριβής του Νίκου Καζαντζάκη με τίτλο: Ο Φρειδερίκος Νίτσε εν τη φιλοσοφία του δικαίου και της πολιτείας. Πιο συγκεκριμένα απαρτίζεται από δύο μέρη: στο α’ μέρος γίνεται μία αναφορά στις προσωπικότητες των δύο ανδρών, παραθέτοντας στοιχεία από τη ζωή τους, το έργο τους, το φιλοσοφικό τους υπόβαθρο, αλλά και την ενασχόλησή τους με άλλους τομείς, όπως η πολιτική. Για τον λόγο αυτό τα κεφάλαια του μέρους αυτού είναι δύο, ένα καθένα εξ αυτών. Το β’ μέρος της εργασίας, το οποίο αποτελεί και το βασικότερο τμήμα της, επίσης αποτελείται από δύο επιμέρους κεφάλαια: ένα για την για την παρουσίαση της διατριβής και ένα για την κριτική αποτίμηση της επίδρασης που δέχθηκε ο Κρητικός λογοτέχνης από τον Γερμανό φιλόσοφο. Επισημαίνεται ότι ο τρόπος παρουσίασης που επιλέγεται είναι ο ίδιος με αυτόν που χρησιμοποιεί ο συγγραφέας όσον αφορά την οργάνωση και την δομή των ενοτήτων. Με τον τρόπο αυτό ο αναγνώστης θα είναι σε θέση να προσεγγίσει ευχερέστερα το συγκεκριμένο έργο του λογοτέχνη. Τέλος, εξάγονται κάποια συμπεράσματα τα οποία αφορούν ολόκληρη την εργασία αλλά και τίθενται κάποιοι προβληματισμοί και μελλοντικά ερωτήματα προς διερεύνηση.
description: The theme of the present post-graduate study is the presentation of Nikos Kazantzakis’s dissertation entitled: ‘‘Friedrich Nietzsche on the Philosophy of Right and the State’’. Specifically, the study consists of two main parts. In the first thereof, a reference to these two personalities is conducted, by using some of their lives’ elements, their written contribution and their philosophical background, as well as their occupations with various other sectors such as the politics. The second part, which covers the main body of the study, also consists of two chapters: one about dissertation’s presentation and one about critical evaluation of Kazantzakis’s influence by Nietzsche. It is stated that the chosen presentation way is the same with the one by the author regarding division and structure of the chapters. Thus, the reader shall have the opportunity to approach more easily author’s piece of work. Finally, some conclusions are drawn referring to the whole study and some questions are set open to future investigation.
Modeling Helioseismic Signatures of Meridional Circulation
Creators: name: Stejko, Andrey
name: Kosovichev, Alexander
name: Pipin, Valery
Publisher: name: Zenodo
Year: 2021
Subjects: Helioseismology

description: We present the application of a new 3D global linearized acoustic algorithm (GALE). With the wide variance of inferred profiles of meridional circulation currently being made from similar observational data, we choose a "forward-modeling" approach to test the helioseismic signatures generated by several physics-based mean-field models of meridional velocities. We simulate the effect of realization noise in measurements in order to place a low-end baseline for whether it is possible to see the difference between single- and double-cell meridional circulation. With minimal parameter changes between the two regimes we show that it may not be possible two distinguish these profiles within the operational time-frame of HMI. We also test several other profiles in an attempt to use mean-field theory to help constrain inferences made through helioseismology inversions.
Pregalactic LiBeB Production by Supernova Cosmic Rays
Creators: name: Kusakabe, Motohiko
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I calculate the evolution of Be and B abundances produced by cosmic rays generated by massive stars in the pregalactic phase of the universe. The inputs for calculation, i.e. the star formation rate and the nuclear abundances of cosmic rays, which I assume to be the same as those of the ISM, are taken from the results of a detailed cosmic chemical evolution model with its parameters best fitted from several items of observational information including an early reionization of the IGM by $z\sim 15$. I found that when the $^6$Li plateau abundance observed in metal-poor halo stars originated in the pregalactic cosmological cosmic ray nucleosynthesis, Be and B simultaneously produced with $^6$Li amount to the lowest levels ever detected in metal-poor halo stars. It is desirable to observe Be and B abundances in metal-poor halo stars with [Fe/H]$\leq -3$ in order to elucidate the possibility of early $^6$LiBeB production by pregalactic supernova cosmic ray nucleosynthesis.
description: 13 pages, 8 figures, ApJ accepted
Electric-field-tunable electronic nematic order in twisted double-bilayer graphene
Creators: name: Samajdar, Rhine
name: Scheurer, Mathias S.
name: Turkel, Simon
name: Rubio-Verdú, Carmen
name: Pasupathy, Abhay N.
name: Venderbos, Jörn W. F.
name: Fernandes, Rafael M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene-based moiré systems have attracted considerable interest in recent years as they display a remarkable variety of correlated phenomena. Besides insulating and superconducting phases in the vicinity of integer fillings of the moiré unit cell, there is growing evidence for electronic nematic order both in twisted bilayer graphene and twisted double-bilayer graphene (tDBG), as signaled by the spontaneous breaking of the threefold rotational symmetry of the moiré superlattices. Here, we combine symmetry-based analysis with a microscopic continuum model to investigate the structure of the nematic phase of tDBG and its experimental manifestations. First, we perform a detailed comparison between the theoretically calculated local density of states and recent scanning tunneling microscopy data [arXiv:2009.11645] to resolve the internal structure of the nematic order parameter in terms of the layer, sublattice, spin, and valley degrees of freedom. We find strong evidence that the dominant contribution to the nematic order parameter comes from states at the moiré scale rather than at the microscopic scale of the individual graphene layers, which demonstrates the key role played by the moiré degrees of freedom and confirms the correlated nature of the nematic phase in tDBG. Secondly, our analysis reveals an unprecedented tunability of the orientation of the nematic director in tDBG by an externally applied electric field, allowing the director to rotate away from high-symmetry crystalline directions. We compute the expected fingerprints of this rotation in both STM and transport experiments, providing feasible ways to probe it. Rooted in the strong sensitivity of the flat bands of tDBG to the displacement field, this effect opens an interesting route to the electrostatic control of electronic nematicity in moiré systems.
description: 21 pages, 10 figures
The Role of Mass and Environment in Multiple Star Formation: A 2MASS Survey of Wide Multiplicity in Three Young Associations
Creators: name: Kraus, Adam L.
name: Hillenbrand, Lynne A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a search for wide binary systems among 783 members of three nearby young associations: Taurus-Auriga, Chamaeleon I, and two subgroups of Upper Scorpius. Near-infrared (JHK) imagery from 2MASS was analyzed to search for wide (1-30"; ~150-4500 AU) companions to known association members, using color-magnitude cuts to reject likely background stars. We identify a total of 131 candidate binary companions with colors consistent with physical association, of which 39 have not been identified previously in the literature. Our results suggest that the wide binary frequency is a function of both mass and environment, with significantly higher frequencies among high-mass stars than lower-mass stars and in the T associations than in the OB association. We discuss the implications for wide binary formation and conclude that the environmental dependence is not a direct result of stellar density or total association mass, but instead might depend on another environmental parameter like the gas temperature. We also analyze the mass ratio distribution as a function of mass and find that it agrees with the distribution for field stars to within the statistical uncertainties. The binary populations in these associations generally follow the empirical mass-maximum separation relation observed for field binaries, but we have found one candidate low-mass system (USco-160611.9-193532; Mtot~0.4 Msun) which has a projected separation (10.8"; 1550 AU) much larger than the suggested limit for its mass. (Abridged)
description: Accepted to ApJ; 27 pages in emulateapj format. The full version of table 2 can be downloaded via http://www.astro.caltech.edu/~alk/tab2.pdf (PDF) or http://www.astro.caltech.edu/~alk/tab2.txt (text)
The PAU Survey: Measurement of Narrow-band galaxy properties with Approximate Bayesian Computation
Creators: name: Tortorelli, Luca
name: Siudek, Malgorzata
name: Moser, Beatrice
name: Kacprzak, Tomasz
name: Berner, Pascale
name: Refregier, Alexandre
name: Amara, Adam
name: García-Bellido, Juan
name: Cabayol, Laura
name: Carretero, Jorge
name: Castander, Francisco J.
name: De Vicente, Juan
name: Eriksen, Martin
name: Fernandez, Enrique
name: Gaztanaga, Enrique
name: Hildebrandt, Hendrik
name: Joachimi, Benjamin
name: Miquel, Ramon
name: Sevilla-Noarbe, Ignacio
name: Padilla, Cristóbal
name: Renard, Pablo
name: Sanchez, Eusebio
name: Serrano, Santiago
name: Tallada-Crespí, Pau
name: Wright, Angus H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Narrow-band imaging surveys allow the study of the spectral characteristics of galaxies without the need of performing their spectroscopic follow-up. In this work, we forward-model the Physics of the Accelerating Universe Survey (PAUS) narrow-band data. The aim is to improve the constraints on the spectral coefficients used to create the galaxy spectral energy distributions (SED) of the galaxy population model in Tortorelli et al. 2020. In that work, the model parameters were inferred from the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) data using Approximate Bayesian Computation (ABC). This led to stringent constraints on the B-band galaxy luminosity function parameters, but left the spectral coefficients only broadly constrained. To address that, we perform an ABC inference using CFHTLS and PAUS data. This is the first time our approach combining forward-modelling and ABC is applied simultaneously to multiple datasets. We test the results of the ABC inference by comparing the narrow-band magnitudes of the observed and simulated galaxies using Principal Component Analysis, finding a very good agreement. Furthermore, we prove the scientific potential of the constrained galaxy population model to provide realistic stellar population properties by measuring them with the SED fitting code \textsc{CIGALE}. We use CFHTLS broad-band and PAUS narrow-band photometry for a flux-limited ($\mathrm{i}<22.5$) sample of galaxies up to redshift $\mathrm{z \sim 0.8}$. We find that properties like stellar masses, star-formation rates, mass-weighted stellar ages and metallicities are in agreement within errors between observations and simulations. Overall, this work shows the ability of our galaxy population model to correctly forward-model a complex dataset such as PAUS and the ability to reproduce the diversity of galaxy properties at the redshift range spanned by CFHTLS and PAUS.
description: 53 pages, 17 figures, Accepted for publication in JCAP
Modeling the Effects of Habitat Fragmentation on the Movements of the Mongolian Gazelle in the Eastern Mongolian Steppe
Creators: name: Gibb, C.
name: Kleyman, M.
name: Koelbel, M.
name: Natoli, R.
name: Orlando, K.
name: Rice, M.
name: Weber, C.
name: Weston-Dawkes, W.
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: Mongolian gazelles
Ecosystems
Wildlife movement
Gemstone Team PATH

description: The Mongolian gazelle, Procapra gutturosa, resides in the immense and dynamic
ecosystem of the Eastern Mongolian Steppe. The Mongolian Steppe ecosystem dynamics,
including vegetation availability, change rapidly and dramatically due to unpredictable
precipitation patterns. The Mongolian gazelle has adapted to this unpredictable vegetation
availability by making long range nomadic movements. However, predicting these movements is
challenging and requires a complex model. An accurate model of gazelle movements is needed,
as rampant habitat fragmentation due to human development projects - which inhibit gazelles
from obtaining essential resources - increasingly threaten this nomadic species. We created a
novel model using an Individual-based Neural Network Genetic Algorithm (ING) to predict how
habitat fragmentation affects animal movement, using the Mongolian Steppe as a model
ecosystem. We used Global Positioning System (GPS) collar data from real gazelles to “train”
our model to emulate characteristic patterns of Mongolian gazelle movement behavior. These
patterns are: preferred vegetation resources (NDVI), displacement over certain time lags, and
proximity to human areas. With this trained model, we then explored how potential scenarios of
habitat fragmentation may affect gazelle movement. This model can be used to predict how
fragmentation of the Mongolian Steppe may affect the Mongolian gazelle. In addition, this
model is novel in that it can be applied to other ecological scenarios, since we designed it in
modules that are easily interchanged.
Direct observation of dijets in central Au+Au collisions at sqrt(s_NN) = 200 GeV
Creators: name: STAR Collaboration
name: Adams, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The STAR Collaboration at RHIC reports measurements of azimuthal correlations of high transverse momentum (p_T) charged hadrons in Au+Au collisions at higher p_T than reported previously. As p_T is increased, a narrow, back-to-back peak emerges above the decreasing background, providing a clear dijet signal for all collision centralities studied. Using these correlations, we perform a systematic study of dijet production and suppression in nuclear collisions, providing new constraints on the mechanisms underlying partonic energy loss in dense matter.
description: 6 pages, 4 figures
UCAC2 46706450: A rapidly rotating K-type subgiant with an extremely hot white dwarf companion
Creators: name: Reindl, Nicole
name: Werner, Klaus
name: Löbling, Lisa
name: Pelisoli, Ingrid
name: Schaffenroth, Veronika
name: Rebassa-Mansergas, Alberto
name: Puji Irawati
name: Juanjuan Ren
Publisher: name: Zenodo
Year: 2021

description: F, G, or K-type stars with a white dwarf companion are relatively rarely known systems in comparison to thousands of M stars with white dwarf companions. We have recently studied one of those systems in detail, and found that the sub-components are very rare stars on their own. The UV source in our system turned out to be an extremely hot white dwarf with an effective temperature of 105,000K. The K-type star was found to be chromospherically active and one of the most rapidly rotating sub-giant known (v_rot=151km/s). Here we present the results of our analysis.
Probing Dark Matter Substructure with Pulsar Timing
Creators: name: Siegel, E. R.
name: Hertzberg, M. P.
name: Fry, J. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We demonstrate that pulsar timing measurements may potentially be able to detect the presence of dark matter substructure within our own galaxy. As dark matter substructure transits near the line-of-sight between a pulsar and an observer, the change in the gravitational field will result in a delay of the light-travel-time of photons. We calculate the effect of this delay due to transiting dark matter substructure and find that the effect on pulsar timing ought to be observable over decadal timescales for a wide range of substructure masses and density profiles. We find that transiting dark matter substructure with masses above 0.01 solar masses ought to be detectable at present by these means. With improved measurements, this method may be able to distinguish between baryonic, thermal non-baryonic, and non-thermal non-baryonic types of dark matter. Additionally, information about structure formation on small scales and the density profiles of galactic dark matter substructure can be extracted via this method.
description: 8 pages, 4 figures, replaced to match published version
Interview with Peter O. Kohler, M.D.
Creators: name: Oregon Health & Science University
Publisher: name: Oregon Health & Science University
Year: 2006
Subjects: Oregon Health & Science University
Oregon Health & Science University Foundation
Vollum Institute (OHSU)
Area Health Education Centers Program
Doernbecher Memorial Hospital for Children
Reinschmidt, Julian S. "Dutch"
Laster, Leonard
Bloom, Joseph D.
Portland Aerial Tram
Oregon Primate Research Center
Hatfield, Mark O., 1922-2011
Kitzhaber, John A. (John Albert), 1947-
Center for Ethics in Health Care (OHSU)
Oregon Opportunity Grant
Oregon Health & Science University. Biomedical Information Communication Center (BICC)
Kohler Pavilion
Oregon Health Plan
Hospital Design and Construction
Practice Management, Medical
Parking Facilities
Minority college students--Recruiting
Governing Board
Research
Health Care Costs
Insurance
Oregon--Portland

description: In this interview, Peter O. Kohler, MD, reflects on his 18-year tenure as President of OHSU. He discusses the significant developments on campus, including the construction of the aerial tram and the expansion of the South Waterfront district. Additionally, he highlights changes within the medical school and acknowledges key figures who shaped Oregon's medical landscape.