cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ALMA View of the High-velocity-dispersion Compact Cloud CO 0.02-0.02 at the Galactic Center
Creators: name: Iwata, Yuhei
name: Oka, Tomoharu
name: Takekawa, Shunya
name: Tsujimoto, Shiho
name: Enokiya, Rei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the results of observations toward the center of the molecular cloud CO 0.02-0.02 made using the Atacama Large Millimeter/Submillimeter Array. The successfully obtained 1 arcsec resolution images of CO $J$=3-2, H$^{13}$CN $J$=4-3, H$^{13}$CO$^{+}$ $J$=4-3, SiO $J$=8-7, CH$_3$OH $J_{K_a, K_c}$ = 7$_{1, 7}$-6$_{1, 6}$ A$^{+}$ lines, and 900 $μ$m continuum show several new features, which have not been identified in previous observations. The dense gas probe (H$^{13}$CN, SiO, CH$_{3}$OH) images are dominated by a pair of northeast-southwest elongated filaments, which may be the main body of CO 0.02-0.02. Two striped patterns perpendicular to each other (F1 and F2) and a high-velocity feature (HV), which appear in different velocity ranges, were prominent in the CO image. An emission hole that may represent an expanding feature was found in the F1 velocity range. F2 appeared to align along the western edge of a 20 pc $\times$ 13 pc ellipse (the Large Shell) identified in the single-dish CO map. The HV contains eight compact clumps at the positive high-velocity end of the CO emissions. Based on these results, we propose a formation scenario for CO 0.02-0.02; internal explosions of supernovae, external perturbations by the Large Shell, and gravitational acceleration by a less luminous star cluster have formed CO 0.02-0.02 in its current state.
description: 11 pages, 9 figures, 1 table, accepted for publication in ApJ
Alt-Konservator Dr. Gessler (1880-1947)
Creators: name: Wymann, Eduard
Publisher: name: Gisler
Year: 1947
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Gessler, Eduard Achilles
subject: Zürich

description: In: Urner Wochenblatt; Jg. 71, Nr. 6 (1947)
Sonnenfleckenzeichnung Nr. 28095.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.01.1990, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1990

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Nonlinear transport of Wigner solid phase surrounding the two-flux composite fermion liquid
Creators: name: Dong, Yu-jiang
name: Wang, Xinghao
name: Zheng, Jianmin
name: Qiao, Weiliang
name: Du, Rui-Rui
name: Pfeiffer, Loren N.
name: West, Kenneth W.
name: Baldwin, Kirk W.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have investigated the low temperature (T) transport properties of fractional quantum Hall (FQH) states in a high-mobility two-dimensional hole gas. According to the composite fermion (CF) model, FQH states stemming from a half-filled Landau level, specifically at filling factors $ν=p/(2p+1) (p=\pm 1,\pm 2,\pm 3,...)$, can be associated with two-flux-attached CFs at the corresponding Lambda filling factor p. The zero-resistance minima and Hall plateaus of these states exhibit unusual temperature dependencies, characterized by rapid increases in width below a threshold temperature around 100 mK. Differential conductivity measurements from Corbino samples reveal that the regimes surrounding the CF liquid display clear nonlinear transport characteristics. This nonlinearity implies that each CF liquid is surrounded by CF solid phase composed of dilute CF excitations. Quantitatively, the applied electric field E influences the motion of CF solid in a way analogous to T, which is dubbed the "E-T duality". Our analysis indicates that this E-T duality is consistent with the Berezinskii-Kosterlitz-Thouless theory in two-dimensional phase transitions.
Sonnenfleckenzeichnung Nr. 28229.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.10.1990, erstellt von Hans Ulrich Keller.
Zusätzlich ist vermerkt: Sonnenturm
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1990

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Coelostat/Teleskop: Das Sonnenlicht wurde über einen Coelostat in eine Vertikalachse, anschliessend von einem Umlenkungsspiegel durch ein Horizontalteleskop gelenkt, und von dessen Okular auf das vertikal fixierte "Sonnenblatt" projiziert.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Editorial
Creators: name: Irving-Bell, Dawne
name: Beckingham, Sue
name: McLain, Matt
name: Wooff, David
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: Welcome to our inaugural edition of The Journal of Social Media for Learning. A new journal where our ethos is centred around the creation of a supportive space where all colleagues, but particularly those new to publishing, can contribute to the scholarly discourse about their academic practice, and if they so wish secure opportunities to gain experience of peer-review and journal editing. To view the complete journal please follow this link.
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
Reexamination of Induction Heating of Primitive Bodies in Protoplanetary Disks
Creators: name: Menzel, Raymond L.
name: Roberge, Wayne G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We reexamine the unipolar induction mechanism for heating asteroids originally proposed in a classic series of papers by Sonett and collaborators. As originally conceived, induction heating is caused by the "motional electric field" which appears in the frame of an asteroid immersed in a fully-ionized, magnetized solar wind and drives currents through its interior. However we point out that classical induction heating contains a subtle conceptual error, in consequence of which the electric field inside the asteroid was calculated incorrectly. The problem is that the motional electric field used by Sonett et al. is the electric field in the freely streaming plasma far from the asteroid; in fact the motional field vanishes at the asteroid surface for realistic assumptions about the plasma density. In this paper we revisit and improve the induction heating scenario by: (1) correcting the conceptual error by self consistently calculating the electric field in and around the boundary layer at the asteroid-plasma interface; (2) considering weakly-ionized plasmas consistent with current ideas about protoplanetary disks; and (3) considering more realistic scenarios which do not require a fully ionized, powerful T Tauri wind in the disk midplane. We present exemplary solutions for two highly idealized flows which show that the interior electric field can either vanish or be comparable to the fields predicted by classical induction depending on the flow geometry. We term the heating driven by these flows "electrodynamic heating", calculate its upper limits, and compare them to heating produced by short-lived radionuclides.
description: Accepted for publication in The Astrophysical Journal. 76 pages including 31 figures
The Carbon Monoxide Releasing Molecule CORM-2 Attenuates Pseudomonas aeruginosa Biofilm Formation
Creators: name: Murray, Thomas S.
name: Okegbe, Chinweike
name: Gao, Yuan
name: Kazmierczak, Barbara I.
name: Motterlini, Roberto
name: Thao, Sandy
name: Dietrich, Lars
name: Brusda, Emanuela M.
Publisher: name: Columbia University
Year: 2012
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences

description: Chronic infections resulting from biofilm formation are difficult to eradicate with current antimicrobial agents and consequently new therapies are needed. This work demonstrates that the carbon monoxide-releasing molecule CORM-2, previously shown to kill planktonic bacteria, also attenuates surface-associated growth of the Gram-negative pathogen Pseudomonas aeruginosa by both preventing biofilm maturation and killing bacteria within the established biofilm. CORM-2 treatment has an additive effect when combined with tobramycin, a drug commonly used to treat P. aeruginosa lung infections. CORM-2 inhibited biofilm formation and planktonic growth of the majority of clinical P. aeruginosa isolates tested, for both mucoid and non-mucoid strains. While CORM-2 treatment increased the production of reactive oxygen species by P. aeruginosa biofilms, this increase did not correlate with bacterial death. These data demonstrate that CO-RMs possess potential novel therapeutic properties against a subset of P. aeruginosa biofilm related infections.
Sonnenfleckenzeichnung Nr. 28201.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 31.07.1990, erstellt von Hans Ulrich Keller.
Zusätzlich ist vermerkt: Sonnenturm
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1990

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Coelostat/Teleskop: Das Sonnenlicht wurde über einen Coelostat in eine Vertikalachse, anschliessend von einem Umlenkungsspiegel durch ein Horizontalteleskop gelenkt, und von dessen Okular auf das vertikal fixierte "Sonnenblatt" projiziert.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
A multichannel hyperspherical model for Efimov physics with van der Waals interactions controlled by a Feshbach resonance
Creators: name: Tempest, Kajsa-My
name: Jonsell, Svante
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Here we present a four-channel model that incorporates a magnetically tunable Feshbach resonance in a system of three atoms that interact via pairwise van der Waals interactions. Our method is designed to model recent experiments where the tunability of the scattering length has been used to study three-body Efimov states, which appear in the limit of a diverging two-body scattering length. Using this model, we calculate three-body adiabatic and effective potential curves and study how the strength (or width) of the Feshbach resonance affects the three-body potential that is connected to the Efimov effect. We find that the position of the repulsive barrier, which has been used to explain the so-called van der Waals universality in broad resonances, is slightly shifted as the narrow resonance limit is approached and that this shift is correlated to the appearance of two avoided crossings in the adiabatic energy landscape. More importantly, the attractive well is markedly shifted upward in energy and is extremely shallow for the narrowest resonance. We argue that this behavior is connected to the breakdown of van der Waals universality for weak (narrow) resonances.
description: 23 pages, 12 figures, submitted to Physical Review A
Constraints on the frequency and mass content of r-process events derived from turbulent mixing in galactic disks
Creators: name: Kolborg, A. N.
name: Ramirez-Ruiz, E.
name: Martizzi, D.
name: Macias, P.
name: Soares-Furtado, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Metal-poor stars in the Milky Way (MW) halo display large star-to-star dispersion in their r-process abundance relative to lighter elements. This suggests a chemically diverse and unmixed interstellar medium (ISM) in the early Universe. This study aims to help shed light on the impact of turbulent mixing, driven by core collapse supernovae (cc-SNe), on the r-process abundance dispersal in galactic disks. To this end, we conduct a series of simulations of small-scale galaxy patches which resolve metal mixing mechanisms at parsec scales. Our set-up includes cc-SNe feedback and enrichment from r-process sources. We find that the relative rate of the r-process events to cc-SNe is directly imprinted on the shape of the r-process distribution in the ISM with more frequent events causing more centrally peaked distributions. We consider also the fraction of metals that is lost on galactic winds and find that cc-SNe are able to efficiently launch highly enriched winds, especially in smaller galaxy models. This result suggests that smaller systems, e.g. dwarf galaxies, may require higher levels of enrichment in order to achieve similar mean r-process abundances as MW-like progenitors systems. Finally, we are able to place novel constraints on the production rate of r-process elements in the MW, $6 \times 10^{-7} {M_\odot / \rm yr} \lesssim \dot{m}_{\rm rp} \ll 4.7 \times 10^{-4} {M_\odot / \rm yr} $, imposed by accurately reproducing the mean and dispersion of [Eu/Fe] in metal-poor stars. Our results are consistent with independent estimates from alternate methods and constitute a significant reduction in the permitted parameter space.
description: 20 pages, 12 figures, 3 appendices. Accepted for publication in The Astrophysical Journal
On the 3-D structure and dissipation of reconnection-driven flow-bursts
Creators: name: Drake, J. F.
name: Swisdak, M.
name: Cassak, P. A.
name: Phan, T. D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The structure of magnetic reconnection-driven outflows and their dissipation are explored with large-scale, 3-D particle-in-cell (PIC) simulations. Outflow jets resulting from 3-D reconnection with a finite length x-line form fronts as they propagate into the downstream medium. A large pressure increase ahead of this ``reconnection jet front'' (RJF), due to reflected and transmitted ions, slows the front so that its velocity is well below the velocity of the ambient ions in the core of the jet. As a result, the RJF slows and diverts the high-speed flow into the direction perpendicular to the reconnection plane. The consequence is that the RJF acts as a thermalization site for the ion bulk flow and contributes significantly to the dissipation of magnetic energy during reconnection even though the outflow jet is subsonic. This behavior has no counterpart in 2-D reconnection. A simple analytic model predicts the front velocity and the fraction of the ion bulk flow energy that is dissipated.
Flipped classroom and case studies facilitated using social media to enhance learning in Higher Education.
Creators: name: Siettou, Christie
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: The trouble with teaching sciences is that it could lead to an inactive and boring learning process (Kankofer, 2014). To avoid this, many have incorporated active learning approaches such as the inclusion of case studies which also provides a link between knowledge and application. However, this still could lead to low student engagement as they do not feel like they have any ownership over their learning. The discussed teaching innovation includes the adoption of a combined flipped classroom in which students use social media to identify news stories as case studies that discuss real-time real-world applications of the theory learned. This approach may not be feasible for all sciences or all other subjects, but this study reveals that it has had great impact on the teaching of an Agricultural Economics and Business module.
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
Communities and Crime in Mexico City
Creators: name: Piccato, Pablo A.
Publisher: name: Columbia University
Year: 2005
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Criminology
subject: FOS: Law
subject: History

description: In Mexico’s capital, understanding the city means understanding crime, and vice versa. More specifically, it means taking some distance from prevailing policy-oriented criminological perspectives and reintegrating the problem of crime into urban history. Asking question to crime from a historical perspective requires a critical use of views of Mexico City as a chaotic, dangerous, dirty city. More useful is asking how is it that people continue to come and stay and build communities in the largest city of the hemisphere in spite of great obstacles. The answer involves a complex picture, where the small detail is as important as the broader landscape.
FEATURES OF COMPLEX THERAPY IN THE TREATMENT OF PERIODONTAL PATHOLOGY
Creators: name: Sarboyev, Erkin
Publisher: name: Zenodo
Year: 2023

description: Inflammatory periodontal diseases, in particular gingivitis and periodontitis, are diseases known to mankind since ancient times. With the progress of civilization, the prevalence of these diseases has increased significantly and acquired general medical as well as social significance. Currently, the facts indicate that systemic processes play one of the most important roles in the pathogenesis of chronic inflammatory periodontal diseases.
The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). VIII. Dynamics of Embedded Dense Cores
Creators: name: Li, Shanghuo
name: Sanhueza, Patricio
name: Zhang, Qizhou
name: Guido, Garay
name: Sabatini, Giovanni
name: Morii, Kaho
name: Lu, Xing
name: Tafoya, Daniel
name: Nakamura, Fumitaka
name: Izumi, Natsuko
name: Tatematsu, Keńichi
name: Li, Fei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the dynamical properties of 294 cores embedded in twelve IRDCs observed as part of the ASHES Survey. Protostellar cores have higher gas masses, surface densities, column densities, and volume densities than prestellar cores, indicating core mass growth from the prestellar to the protostellar phase. We find that ~80% of cores with virial parameter ($α$) measurements are gravitationally bound ($α$< 2). We also find an anti-correlation between the mass and the virial parameter of cores, with massive cores having on average lower virial parameters. Protostellar cores are more gravitationally bound than prestellar cores, with an average virial parameter of 1.2 and 1.5, respectively. The observed non-thermal velocity dispersion (from N$_{2}$D$^{+}$ or DCO$^{+}$) is consistent with simulations in which turbulence is continuously injected, whereas the core-to-core velocity dispersion is neither in agreement with driven nor decaying turbulence simulations. We find no significant increment in the line velocity dispersion from prestellar to protostellar cores, suggesting that dense gas within the core traced by these deuterated molecules is not yet severely affected by turbulence injected from outflow activity at the early evolutionary stages traced in ASHES. The most massive cores are strongly self-gravitating and have greater surface density, Mach number, and velocity dispersion than cores with lower masses. Dense cores have not significant velocity shifts relative to their low-density envelopes, suggesting that dense cores are co-moving with their envelopes. We conclude that the observed core properties are more in line with predictions of ``clump-fed" scenarios rather than with ``core-fed" scenarios.
description: 29 pages, 14 figures, 5 tables. Accepted for publication by ApJ. Tables 2 and 3 are available here: https://github.com/ShanghuoLi/70-um-dark-high-mass-clumps
Endomotives of toric varieties
Creators: name: Jin, Zhaorong
name: Marcolli, Matilde
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We construct endomotives associated to toric varieties, in terms of the decomposition of a toric variety into torus orbits and the action of a semigroup of toric morphisms. We show that the endomotives can be endowed with time evolutions and we discuss the resulting quantum statistical mechanical systems. We show that, in particular, one can construct a time evolution related to the logarithmic height function. We discuss relations to F1-geometry.
description: 29 pages, LaTeX
3d dualities from 4d dualities for orthogonal groups
Creators: name: Aharony, Ofer
name: Razamat, Shlomo S.
name: Seiberg, Nathan
name: Willett, Brian
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend recent work on the relation of 4d and 3d IR dualities of supersymmetric gauge theories with four supercharges to the case of orthogonal gauge groups. The distinction between different SO(N) gauge theories in 4d plays an important role in this relation. We show that the 4d duality leads to a 3d duality between an SO(N_c) gauge theory with N_f flavors and an SO(N_f-N_c+2) theory with N_f flavors and extra singlets, and we derive its generalization in the presence of Chern-Simons terms. There are two different O(N) theories in 3d, which we denote by O(N)_\pm, and we also show that the O(N_c)_- gauge theory is dual to a Spin(N_f-N_c+2) theory, and derive from 4d the known duality between O(N_c)_+ and O(N_f-N_c+2)_+. We verify the consistency of these 3d dualities by various methods, including index computations.
description: 49 pages, harvmac. v2: a minor change
Sonnenfleckenzeichnung Nr. 28218.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 13.09.1990, erstellt von Hans Ulrich Keller.
Zusätzlich ist vermerkt: Sonnenturm
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1990

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Coelostat/Teleskop: Das Sonnenlicht wurde über einen Coelostat in eine Vertikalachse, anschliessend von einem Umlenkungsspiegel durch ein Horizontalteleskop gelenkt, und von dessen Okular auf das vertikal fixierte "Sonnenblatt" projiziert.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Escaping the inactive classroom: Escape Rooms for teaching technology
Creators: name: O'Brien, Rachelle Emily
name: Farrow, Scott
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: Free Ed was a one-hour fun and interactive hands on Bring Your Own Device workshop which explored the functions necessary to build collaborative classrooms using Microsoft Teams. This paper is intended to give you an insight into the pedagogy and technology used in creating the Free Ed workshop delivered at Social Media in HE (SocMedHE) conference, which utilised an Escape Room to deliver Microsoft Teams teaching. This paper aims to give you an insight into the workshop itself, what participants thought, reflections on delivering the session and finally, some key points for you to take forward if you would like to try this yourself.
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
Constraining a stochastic variation of the gravitational coupling with binary systems
Creators: name: Mazzitelli, Francisco D.
name: Trombetta, Leonardo G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the effect of stochastic fluctuations of the gravitational coupling G on the evolution of binary systems. We work at an elementary level, in the Newtonian limit, and focusing mainly on laser ranging. We show that, due to cumulative effects, observational data may be used to put bounds on the stochastic fluctuations. We also reanalyse previous results on the implications of stochastic fluctuations of G on cosmological models.
description: 24 pages, 2 figures
Sonnenfleckenzeichnung Nr. 28103.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 21.01.1990, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1990

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Polyol pathway and modulation of ischemia-reperfusion injury in Type 2 diabetic BBZ rat hearts
Creators: name: Li, Qing
name: Hwang, Yuying
name: Ananthakrishnan, Radha
name: Oates, Peter
name: Guberski, Dennis
name: Ramasamy, Ravichandran
Publisher: name: Columbia University
Year: 2008
Subjects: Medicine

description: We investigated the role of polyol pathway enzymes aldose reductase (AR) and sorbitol dehydrogenase (SDH) in mediating injury due to ischemia-reperfusion (IR) in Type 2 diabetic BBZ rat hearts. Specifically, we investigated, (a) changes in glucose flux via cardiac AR and SDH as a function of diabetes duration, (b) ischemic injury and function after IR, (c) the effect of inhibition of AR or SDH on ischemic injury and function. Hearts isolated from BBZ rats, after 12 weeks or 48 weeks diabetes duration, and their non-diabetic littermates, were subjected to IR protocol. Myocardial function, substrate flux via AR and SDH, and tissue lactate:pyruvate (L/P) ratio (a measure of cytosolic NADH/NAD+), and lactate dehydrogenase (LDH) release (a marker of IR injury) were measured. Zopolrestat, and CP-470,711 were used to inhibit AR and SDH, respectively. Myocardial sorbitol and fructose content, and associated changes in L/P ratios were significantly higher in BBZ rats compared to non-diabetics, and increased with disease duration. Induction of IR resulted in increased ischemic injury, reduced ATP levels, increases in L/P ratio, and poor cardiac function in BBZ rat hearts, while inhibition of AR or SDH attenuated these changes and protected hearts from IR injury. These data indicate that AR and SDH are key modulators of myocardial IR injury in BBZ rat hearts and that inhibition of polyol pathway could in principle be used as a therapeutic adjunct for protection of ischemic myocardium in Type 2 diabetic patients.
Sonnenfleckenzeichnung Nr. 28097.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.01.1990, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1990

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Co-creating learning experiences with students as partners
Creators: name: Beckingham, Sue
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: The focus of this paper is a reflection on the co-created learning experience that led to three students leading a workshop at SocMedHE19. This students as partners initiative has developed over the course of four years, each set of students building on the work of the group from the previous year. Consideration is given to the outcomes of the continued learning experience, the development of a virtual community of practice and potential future steps to continue this work.
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
title: Erklärung vieler in Westphalen ansässigen Mitglieder des deutschen Adels, die beantragte Aufhebung der Stammguts-Eigenschaft und des hergebrachten Erbrechts betreffend; [1848]
title: Hohe Nationalversammlung! ... ; [Münster, den 16. August 1848]
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Kopftitel. - Datiert: Uebergeben am 23. August 1848. - Kolophon: Druck von C. Krebs-Schmitt. - In Fraktur
Seven reflares, a mini-outburst and an outburst : High amplitude optical variations in the black hole X-ray binary Swift J1910.2-0546
Creators: name: Saikia, Payaswini
name: Russell, David M.
name: Pirbhoy, Saarah F.
name: Baglio, M. C.
name: Bramich, D. M.
name: Alabarta, Kevin
name: Lewis, Fraser
name: Charles, Phil
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present long-term (2012-2022) optical monitoring of the candidate black hole X-ray binary Swift J1910.2-0546 with the Faulkes Telescopes and Las Cumbres Observatory (LCO) network. Following its initial bright 2012 outburst, we find that the source displayed a series of at least 7 quasi-periodic, high amplitude (~3 mags) optical reflares in 2013, with a recurrence time increasing from ~42 days to ~49 days. In 2014, the source experienced a mini-outburst with two peaks in the optical. We also study the recent 2022 outburst of the source at optical wavelengths, and perform a comparative analysis with the earlier rebrightenings. A single X-ray detection and only two radio detections were obtained during the 2013 reflaring period, and only optical detections were acquired in 2014. During the reflaring in both 2013 and 2014, the source showed bluer-when-brighter behavior, having optical colors consistent with a blackbody heating and cooling between 4500 and 9500 K, i.e. the temperature range in which hydrogen starts to ionize. Finally, we compare the flaring behavior of the source to re-brightening events in other X-ray binaries. We show that the repeated reflarings of Swift J1910.2-0546 are highly unusual, and propose that they arise from a sequence of repetitive heating and cooling front reflections travelling through the accretion disk.
description: Accepted for publication in ApJ, appendix will appear at the published version of the paper
Modulation Transfer Function for Speech Intelligibility
Creators: name: Elliot, Taffeta Marie
name: Theunissen, Frederic E.
Publisher: name: Columbia University
Year: 2009
Subjects: subject: Audiology
subject: Neurosciences
subject: FOS: Clinical medicine

description: We systematically determined which spectrotemporal modulations in speech are necessary for comprehension by human listeners. Speech comprehension has been shown to be robust to spectral and temporal degradations, but the specific relevance of particular degradations is arguable due to the complexity of the joint spectral and temporal information in the speech signal. We applied a novel modulation filtering technique to recorded sentences to restrict acoustic information quantitatively and to obtain a joint spectrotemporal modulation transfer function for speech comprehension, the speech MTF. For American English, the speech MTF showed the criticality of low modulation frequencies in both time and frequency. Comprehension was significantly impaired when temporal modulations <12 Hz or spectral modulations <4 cycles/kHz were removed. More specifically, the MTF was bandpass in temporal modulations and low-pass in spectral modulations: temporal modulations from 1 to 7 Hz and spectral modulations <1 cycles/kHz were the most important. We evaluated the importance of spectrotemporal modulations for vocal gender identification and found a different region of interest: removing spectral modulations between 3 and 7 cycles/kHz significantly increases gender misidentifications of female speakers. The determination of the speech MTF furnishes an additional method for producing speech signals with reduced bandwidth but high intelligibility. Such compression could be used for audio applications such as file compression or noise removal and for clinical applications such as signal processing for cochlear implants.
Dog filters & flower crowns: Using Snapchat as a Pedagogical Tool in Higher Education
Creators: name: Kerr, Gary W.
name: Faulkner, Suzanne
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: Academics overwhelmingly value social media as a tool for enhancing student learning (Moran et al, 2011). Generally, academics use information technologies and social media to engage with students in a top-down fashion i.e. it is the norm to use whatever the learning technologists deem appropriate (Liu, 2010). Snapchat is a social networking platform that is reserved for communicating with close relationships and, unlike Twitter, is generally not a method for communicating with strangers (Vaterlaus et al, 2016). Thus, any effective use of Snapchat within a learning environment must finely balance engaging with students on social media to facilitate their learning on one hand, and invading their private space on the other (Woodley & Meredith, 2012). After all, the main reason that students use social media is for social engagement, not classroom engagement (Liu, 2010). In this paper, we discuss the use of Snapchat as a learning tool, our own experiences of using this platform to engage students from two very different academic disciplines – Festival Management and Prosthetics and Orthotics, using this platform to enhance student learning and engagement in different ways. From creating ‘stories’ that help package concepts and theories to make them more accessible; to curating learning and observations from field trips; in addition to creation of learning resources, discussion groups; the possibilities of Snapchat usage within the learning environment are endless. This paper sets out to provide participants with practical advice on how to use Snapchat within the learning environment. We encourage teachers in higher education to think about how they can creatively use the app to make learning more accessible. Ultimately, Snapchat is a playful app, and the facilitation of playful learning can help promote creativity, engagement and academic achievement among students (Kangas, 2010).
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
Holographic imaging of surface acoustic waves
Creators: name: Bruno, Francois
name: Laurent, Jérôme
name: Royer, Daniel
name: Atlan, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on an experimental demonstration of surface acoustic waves monitoring on a thin metal plate with heterodyne optical holography. Narrowband imaging of local optical pathlength modulation is achieved with a frequency-tunable time-averaged laser Doppler holographic imaging scheme on a sensor array, at video-rate. This method enables robust and quantitative mapping of out-of-plane vibrations of nanometric amplitudes at radiofrequencies.
Non-zero phase-shifts of acoustic waves in the lower solar atmosphere measured from realistic simulations and their role in local helioseismology
Creators: name: Waidele, M.
name: Zhao, Junwei
name: Kitiashvili, I. N.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Previous studies analyzing the evanescent nature of acoustic waves in the lower solar atmosphere, up to 300\,km above the photosphere, have shown an unexpected phase shift of an order of 1\,s between different heights. Those studies investigated the spectral line \ion{Fe}{1} 6173.3\,Å, commonly used for helioseismic measurements. Such phase-shifts can contribute to a misinterpretation of the measured travel times in local helioseismology, complicating inferences of, e.g., the deep meridional flow. In this study, we carry out phase-shift computations using a simulated, fully radiative, and convective atmosphere from which the \ion{Fe}{1} 6173.3\,Å line is synthesized. The resulting phase-shifts as functions of frequency across multiple heights show non-zero values in evanescent waves, similar to what was found in observational data. Comparing the Doppler-velocities estimated from the synthesized absorption line with the true velocities directly obtained from the simulated plasma motions, we find substantial differences in phase-shifts between the two. This leads us to hypothesize that the non-adiabaticity of the solar atmosphere yields extra phase-shift contributions to Doppler velocities. Finally, computing phase-differences for different viewing angles reveals a systematic center-to-limb variation, similar to what is present in observations. Overall, this study helps to improve our understanding of the physical cause of the helioseismic center-to-limb effect.
An interactive social media workshop using Lego® Serious Play®
Creators: name: Sum, Kiu
name: Beckingham, Sue
name: Faulkner, Suzanne
name: Baff, Deborah
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: Through a #SocMedHE19 conference workshop, the aim was to provide a supportive and open way to discuss the use of social media and to explore any concerns or barriers raised; as well as to gain insights into their professional use of different social media in learning and teaching. A generic overview of Twitter, LinkedIn, Snapchat and Flipgrid were given, drawing on examples of our own learning, teaching and sharing practices in our local institutions. We then wanted to engage the delegates (staff and students) to explore these specific tools themselves and consider how they could be utilised in their own practice. An innovative approach was taken to facilitate and capture this discussion using Lego® Serious Play®, Padlet and Flipgrid. This paper considers how effective this interactive approach was and to what extent it encouraged open discussion about the perceived enablers and barriers to using this selection of social media tools. Key findings highlight the benefits of using social media tools in a classroom setting, enabling participants to increase understanding and confidence of each available tool and exposing them to utilising it in a pedagogical way. The workshop enabled participants to connect with one another, expanding their network and to share potential ideas for learning and teaching. The need for ongoing support for colleagues who are not familiar with the approaches used and implementation in a classroom setting was strongly recommended by participants.
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
Evidence of a Binary-Induced Spiral from an Incomplete Ring Pattern of CIT 6
Creators: name: Kim, Hyosun
name: Hsieh, I-Ta
name: Liu, Sheng-Yuan
name: Taam, Ronald E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: With the advent of high-resolution high-sensitivity observations, spiral patterns have been revealed around several asymptotic giant branch (AGB) stars. Such patterns can provide possible evidence for the existence of central binary stars embedded in outflowing circumstellar envelopes. Here, we suggest the viability of explaining the previously observed incomplete ring-like patterns with the spiral-shell structure due to the motion of (unknown) binary components viewed at an inclination with respect to the orbital plane. We describe a method of extracting such spiral-shells from an incomplete ring-like pattern to place constraints on the characteristics of the central binary stars. The use of gas kinematics is essential in facilitating a detailed modeling for the three-dimensional structure of the circumstellar pattern. We show that a hydrodynamic radiative transfer model can reproduce the structure of the HC3N molecular line emission of the extreme carbon star, CIT 6. This method can be applied to other sources in the AGB phase and to the outer ring-like patterns of pre-planetary nebulae for probing the existence of embedded binary stars, which are highly anticipated with future observations using the Atacama Large Millimeter/submillimeter Array.
description: 21 pages, 6 figures, 1 table, accepted for publication in the Astrophysical Journal
Can Social Media Use Predict Intercultural Knowledge, Attitude, and Skills Among Generation Z?
Creators: name: Al-Ali, Sebah
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: This study was mainly concerned with the intercultural competence of young Emiratis. In particular, it aimed to investigate the possible correlation between social media use and the development of intercultural knowledge, attitude and skills. Conducted towards the end of 2017 and beginning of 2018, 187 female college students revealed their social media use and intercultural competence by responding to an online questionnaire. Preliminary results show some aspects of social media use could possibly be predictive of intercultural competence. Further research is needed to validate the results; however, some teaching and e-learning implications were discussed based on the findings of this study.
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
MPEC 2023-V115 : DAILY ORBIT UPDATE (2023 November 8)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Problematising the use of Snapchat in Higher Education Teaching and Learning
Creators: name: Fenn, Paul
name: Reilly, Paul J
Publisher: name: The Journal of Social Media for Learning
Year: 2020

description: There has been relatively little research exploring how Snapchat can be used within Higher Education teaching to date. In this viewpoint, we draw on extant empirical data to explore the strengths and weaknesses of using the Instant Messaging (IM) app to support student learning and teaching within universities. We conclude by considering whether it is appropriate to fully integrate apps like Snapchat into Higher Education in light of the revelations of data misuse by these platforms. The growth of ‘surveillance realism’, whereby citizens feel increasingly powerless at their personal data being repurposed by these companies for financial gain, arguably supersedes any supposed pedagogical benefits for student learners.
description: The Journal of Social Media for Learning, Vol 1 No 1 (2020): 2019 SocMedHE Conference Edition
Women with perinatal suicidal ideation–A scoping review of the biopsychosocial risk factors to inform health service provision and research
Creators: name: BRIGHT, ANN-MARIE
name: DOODY, OWEN
name: TUOHY, TERESA
Publisher: name: University of Limerick
Year: 2022
Subjects: subject: Health sciences
subject: FOS: Health sciences

description: Objectives This review aims to map the existing evidence on perinatal suicidal ideation, identify biopsychosocial risk factors associated with suicidal ideation and make recommendations for service provision and future research. Methods Scoping review guided by Arskey’s and O’Malley’s (2005) framework. Five academic databases (PsycINFO, MEDLINE, CINAHL, ASSIA and Academic Search Complete) were searched from 1st January 2009 to 1st April 2022. Studies were screened by title, abstract and full text against inclusion and exclusion criteria. Primary qualitative, quantitative and mixed-methods studies, written in English pertaining to perinatal suicidal ideation were included. Forty-one studies met the eligibility criteria, data were extracted and narratively synthesised. Findings are reported in accordance with the PRISMA-SR extension. Key conclusions Findings were mapped onto the biopsychosocial framework and include sleep deprivation, maternal age, pregnancy complications, mood disorders, intimate partner violence, childhood maltreatment/abuse, low socioeconomic status, alcohol and tobacco misuse, miscarriage/perinatal loss, birth trauma and sleep deprivation. The findings demonstrate that the biopsychosocial risk factors for perinatal suicidal ideation are varied and complex. Implications for practice The minimisation of women’s experiences may lead to detrimental consequences and there is a need for increased knowledge of mental health problems by those working with women in the perinatal period to ensure safety planning conversations occur with every woman meeting ‘at risk’ criteria