cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Planet gap opening across stellar masses
Creators: name: Rosotti, Giovanni
Publisher: name: Zenodo
Year: 2020

description: Gaps and rings are now ubiquitously found by high-resolution ALMA observations and planets are commonly invoked as an explanation. In this contribution I discuss how the minimum planet mass needed to open a gap varies across different stellar host masses and distances from the star. Naively gap opening around low-mass stars should be possible for lower mass planets, giving us a look into the young, low-mass planet population. Using dusty hydrodynamical simulations, I find however the opposite behaviour, as a result of the fact that discs around low-mass stars are geometrically thicker: gap opening around low-mass stars can require more massive planets. Depending on the theoretical isochrone employed to predict the relationship between stellar mass and luminosity, the gap opening planet mass could also be independent of stellar mass, but in no case I find that gap opening becomes easier around low-mass stars. This would lead to the expectation of a lower incidence of such structures in lower mass stars, since exoplanet surveys show that low-mass stars have a lower fraction of giant planets. More generally, this study enables future imaging observations as a function of stellar mass to be interpreted using information on the mass versus luminosity relations of the observed samples.
X-ray crystal structure analysis and the Ru valence of Ba4Ru3O10 single crystals
Creators: name: Igarashi, Taichi
name: Nogami, Yoshio
name: Klein, Yannick
name: Rousse, Gwenaelle
name: Okazaki, Ryuji
name: Taniguchi, Hiroki
name: Yasui, Yukio
name: Terasaki, Ichiro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present the single-crystalline x-ray diffraction study on the Ba4Ru3O10 consisting of the corner-shared Ru3O12 trimers. The crystal structure is re-determined from 78 to 300 K across an antiferromagnetic transition at 105 K. The orthorhombic symmetry (Cmca, space group No. 64) is preserved at all temperatures measured. This structure presents exceptionally long Ru-O distances characterized by a significant distribution within the Ru3O12 trimer. A bond valence sum calculation suggests that the charge disproportionation within the Ru3O12 trimer emerges even at room temperature, which we ascribe to molecular orbital formation in the Ru3O12 trimer, as supported by recent theoretical calculations. Based on the analyzed crystal structure, the electronic states and the nature of the phase transition at 105 K are discussed.
description: 7pages, 6 figures
Spin wave excitation patterns generated by spin torque oscillators
Creators: name: Macià, Ferran
name: Hoppensteadt, Frank. C.
name: Kent, Andrew D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin torque nano oscillators (STNO) are nano-scale devices that can convert a direct current into short wave-length spin-wave excitations in a ferromagnetic layer. We show that arrays of STNO can be used to create directional spin-wave radiation similar to electromagnetic antennas. Combining STNO excitations with planar spin waves also creates interference patterns. We show that these interference patterns are static and have information on the wavelength and phase of the spin waves emitted from the STNO.We describe means of actively controlling spin-wave radiation patterns with the direct current owing through STNO, which is useful in on-chip communication and information processing and could be a promising technique for studying short wave-length spin waves in different materials.
description: 8 pages 8 figs
Acoustic Bessel-like beam formation by an axisymmetric grating
Creators: name: Jiménez, N.
name: Romero-García, V.
name: Picó, R.
name: Cebrecos, A.
name: Sánchez-Morcillo, V. J.
name: Garcia-Raffi, L. M.
name: Sánchez-Pérez, J. V.
name: Staliunas, K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report Bessel-like beam formation of acoustic waves by means of an axisymmetric grating of rigid tori. The results show that the generated beam pattern is similar to that of Bessel beams, characterized by elongated non-diffracting focal spots. A multiple foci structure is observed, due to the finite size of the lens. The dependence of the focal distance on the frequency is also discussed, on the basis of an extended grating theory. Experimental validation of acoustic Bessel-like beam formation is also reported for sound waves. The results can be generalized to wave beams of different nature, as optical or matter waves.
Eristalis saltuum Rondani 1857
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Eristalis
Eristalis saltuum

description: Eristalis saltuum Rondani, 1857
ORIGINAL DESCRIPTION: 1857: 40 (key), 43 (description).
TYPE LOCALITY: “ ex alpibus pedemontanis … a Tiguro [Piedmont (Italy) Alps … Tigurum (= Zurich, Switzerland)]”.
TYPE MATERIAL: 3 ♂♂, syntypes (one missing abdomen; one covered with mold and missing hind-legs; one partially eaten by dermestids, covered with mold, missing left hind-leg) (MZUF: Box 2): Eristalis Fab. / saltuum Rndn., Alpi / 39.
CURRENT STATUS: junior synonym of Eristalis nigritarsis Macquart, 1834 (Peck 1988: 188, Belcari et al. 1995a: 17); junior synonym of Eristalis cryptarum (Fabricius, 1794) (Hippa et al. 2001: 298).
REMARKS: Rondani (1857: 43) described both sexes of Eristalis saltuum without specifying either the number of or the length of the specimens: “ Marem bis obtinui ex alpibus pedemontanis, una vice a D. Truqui altera a Prof. Bellardi. Foeminam a Tiguro D. Bremi misit ” [I obtained the male twice from the Piedmont Alps, once from Dr. Truqui, the second time from Prof. Bellardi. Dr. Bremi sent the female from Tigurum]”. We found three male syntypes in this study. The female was not found in this study and is presumed lost.
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 246, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Short-Duration Gamma-Ray Bursts
Creators: name: Berger, Edo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gamma-ray bursts (GRBs) display a bimodal duration distribution, with a separation between the short- and long-duration bursts at about 2 sec. The progenitors of long GRBs have been identified as massive stars based on their association with Type Ic core-collapse supernovae, their exclusive location in star-forming galaxies, and their strong correlation with bright ultraviolet regions within their host galaxies. Short GRBs have long been suspected on theoretical grounds to arise from compact object binary mergers (NS-NS or NS-BH). The discovery of short GRB afterglows in 2005, provided the first insight into their energy scale and environments, established a cosmological origin, a mix of host galaxy types, and an absence of associated supernovae. In this review I summarize nearly a decade of short GRB afterglow and host galaxy observations, and use this information to shed light on the nature and properties of their progenitors, the energy scale and collimation of the relativistic outflow, and the properties of the circumburst environments. The preponderance of the evidence points to compact object binary progenitors, although some open questions remain. Based on this association, observations of short GRBs and their afterglows can shed light on the on- and off-axis electromagnetic counterparts of gravitational wave sources from the Advanced LIGO/Virgo experiments.
description: 64 pages, 20 figures; accepted for publication in Annual Review of Astronomy and Astrophysics, vol 51 (2014)
title: Parler de soi, parler sida
title: Articulation entre le récit de soi et la graphiation dans Pilules bleues (F. Peeters, 2001)
titleType: Subtitle
title: Parler de soi, parler sida
titleType: AlternativeTitle
Creators: name: Graff, Séverine
name: Vogel, Piera
Publisher: name: Unknown
Year: 0

description: La bande dessinée ne constitue pas, de prime abord, un objet « digne » de figurer dans un corpus gymnasial. Genre littéraire secondaire, accessible aux adolescents, historiquement marginal : les lieux communs ne manquent pas pour expliquer son absence au Secondaire 2. Parler de soi, parler SIDA. Articulation entre le récit de soi et la graphiation dans Pilules bleues de F. Peeters va à rebours de ces présupposés. Nous défendons dans ce mémoire la lecture intégrale de Pilules bleues du Genevois Frederick Peeters, un roman graphique de 2001 qui offre à la littérature romande un grand succès public et critique. En racontant sous un mode autobiographique, sa rencontre avec sa compagne séropositive, Peeters propose le récit intime de la construction d’un couple, d’une famille recomposée, et le quotidien marqué par les traitements et la lutte contre le VIH. Usant d’un style très personnel, refusant l’esquisse préalable, Peeters parvient à traduire visuellement l’intimité de sa famille en empruntant certains ressorts propres au journal intime. La séquence didactique proposée dans le cadre de ce mémoire permet d’aborder les genres littéraires de l’autobiographie et du journal, de travailler les régimes de focalisation, d’outiller les élèves pour désigner les pratiques de la bande dessinée, de discuter de prévention et de maladies sexuellement transmissibles, et –surtout– d’initier les élèves au plaisir de l’analyse stylistique. Si l’on surmonte les réserves élitistes qui entourent encore trop souvent le 9e art, nos acquis démontrent la richesse didactique que peut apporter la littérature romande contemporaine.
Evaluating Climate Field Reconstruction Techniques Using Improved Emulations of Real-World Conditions
Creators: name: Wang, J.
name: Emile-Geay, J.
name: Smerdon, Jason E.
name: Guillot, D.
name: Rajaratnam, B.
Publisher: name: Columbia University
Year: 2014
Subjects: Paleoclimatology
Atmosphere

description: Pseudoproxy experiments (PPEs) have become an important framework for evaluating paleoclimate reconstruction methods. Most existing PPE studies assume constant proxy availability through time and uniform proxy quality across the pseudoproxy network. Real multiproxy networks are, however, marked by pronounced disparities in proxy quality, and a steep decline in proxy availability back in time, either of which may have large effects on reconstruction skill. A suite of PPEs constructed from a millennium-length general circulation model (GCM) simulation is thus designed to mimic these various real-world characteristics. The new pseudoproxy network is used to evaluate four climate field reconstruction (CFR) techniques: truncated total least squares embedded within the regularized EM (expectation-maximization) algorithm (RegEM-TTLS), the Mann et al. (2009) implementation of RegEM-TTLS (M09), canonical correlation analysis (CCA), and Gaussian graphical models embedded within RegEM (GraphEM). Each method's risk properties are also assessed via a 100-member noise ensemble. Contrary to expectation, it is found that reconstruction skill does not vary monotonically with proxy availability, but also is a function of the type and amplitude of climate variability (forced events vs. internal variability). The use of realistic spatiotemporal pseudoproxy characteristics also exposes large inter-method differences. Despite the comparable fidelity in reconstructing the global mean temperature, spatial skill varies considerably between CFR techniques. Both GraphEM and CCA efficiently exploit teleconnections, and produce consistent reconstructions across the ensemble. RegEM-TTLS and M09 appear advantageous for reconstructions on highly noisy data, but are subject to larger stochastic variations across different realizations of pseudoproxy noise. Results collectively highlight the importance of designing realistic pseudoproxy networks and implementing multiple noise realizations of PPEs. The results also underscore the difficulty in finding the proper bias-variance tradeoff for jointly optimizing the spatial skill of CFRs and the fidelity of the global mean reconstructions.
Possible antigravity regions in $F(R)$ theory?
Creators: name: Bamba, Kazuharu
name: Nojiri, Shin'ichi
name: Odintsov, Sergei D.
name: Sáez-Gómez, Diego
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct an $F(R)$ gravity theory corresponding to the Weyl invariant two scalar field theory. We investigate whether such $F(R)$ gravity can have the antigravity regions where the Weyl curvature invariant does not diverge at the Big Bang and Big Crunch singularities. It is revealed that the divergence cannot be evaded completely but can be much milder than that in the original Weyl invariant two scalar field theory.
description: minor corrections added
Electrophysiological Biomarkers for Non-clinical Safety Evaluation of Neuro-interventional Devices
Creators: name: Regulatory Catalog
Publisher: name: Zenodo
Year: 2023

description: The objective of this tool is to assist sponsors and the FDA reviewers for a comprehensive analysis of benefit-risk of neuro-interventional devices and describes methods for data acquisition and analysis. Brain electrophysiological signals can be acquired with invasive or non-invasive electrodes. This tool includes several quantitative electrophysiological features that would change after occurrence of brain damage. Detection of such changes implies a safety concern, and the degree of change suggests the level of risk.
The observational impact of dust trapping in self-gravitating discs
Creators: name: Cadman, James
Publisher: name: Zenodo
Year: 2020

description: The gravitational instability (GI) may play an important role in the very early evolution of protoplanetary discs by providing a source of viscosity, generating conditions suitable for accelerated dust growth, and potentially forming giant gaseous protoplanets through the direct gravitational collapse of disc material. It is now possible to observe young discs with telescopes such as ALMA. However a self-gravitating phase is likely to be brief (t<10^5 yrs) as a disc will rapidly evolve toward a lower mass, gravitationally stable state, thus limiting our prospects of observing these systems. In this work we use Monte Carlo radiative transfer models to analyse how dust-trapping in the spiral regions of self-gravitating discs results in enhanced emission, and we place constraints on the disc properties required to drive spiral features detectable with ALMA. We also analyse the Elias 27, WaOph 6 and IM Lup disc observations from the DSHARP survey, and make predictions about the nature of the spiral substructure which has been observed.
Revisiting the Jerash Silver Scroll: A new visual data analysis approach
Creators: name: Baum, Daniel
name: Herter, Felix
name: Larsen, John Møller
name: Lichtenberger, Achim
name: Raja, Rubina
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Jerash silver scroll
subject: Pseudo-Arabic script
subject: Complexly folded materials
subject: Virtual unfolding
subject: Visualization
subject: 004 Informatik

description: This article revisits a complexly folded silver scroll excavated in Jerash, Jordan, in 2014 that was digitally examined in 2015. In this article we apply, examine and discuss a new virtual unfolding technique that results in a clearer image of the scroll's 17 lines of writing. We also compare it to the earlier unfolding and discuss progress in general analytical tools. We publish the original and the new images as well as the unfolded volume data open access in order to make these available to researchers interested in optimising unfolding processes of various complexly folded materials.
Eumerus bicolor Rondani 1857
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Eumerus
Eumerus bicolor

description: Eumerus bicolor Rondani, 1857
ORIGINAL DESCRIPTION: 1857: 84 (key), 89 (description).
TYPE LOCALITY: “ in alpibus pedemontanis [Piedmont (Italy) Alps]”.
TYPE MATERIAL: 1 ♂, lectotype (MRSN: Box 53): Eumerus Meig. bicolor Bell., Stupinigi [= Stupinigi (Piedmont)] / lectotype Eum. bicolor Bell. in Rond. 1857, ♂.
PARALECTOTYPES EXAMINED: 2 ♂♂ (MRSN: Box 53): Eumerus Meig. bicolor Bell., Stupinigi [= Stupinigi (Piedmont)] / 3 66 / paralectotype Eum. bicolor Bell. in Rond. 1857 ♂; 1 ♂ (MRSN: Box 53): Eumerus Meig. bicolor Bell., Stupinigi [= Stupinigi (Piedmont)] / 17 64 / paralectotype Eum. bicolor Bell. in Rond. 1857, ♂.
CURRENT STATUS: junior synonym of Eumerus ovatus (Peck 1988: 160, Belcari et al. 1995a: 15).
REMARKS: Rondani (1857: 89) described Eumerus bicolor from just the male sex, without specifying the exact number of specimens, but giving a single measurement of length, despite there being four specimens in the type series found in this study. Rondani attributed the species name to L. Bellardi. Three females in the MRSN (Box 53) are not included in the type series because of their sex. Sommaggio (2007: 136) designated a lectotype (♂) and paralectotypes (3 ♂♂).
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 248, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Coupling layers regularizes wave propagation in laminar stochastic neural fields
Creators: name: Kilpatrick, Zachary P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We study the effects of coupling between layers of stochastic neural field models with laminar structure. In particular, we focus on how the propagation of waves of neural activity in each layer is affected by the coupling. Synaptic connectivities within and between each layer are determined by integral kernels of an integrodifferential equation describing the temporal evolution of neural activity. Excitatory neural fields, with purely positive connectivities, support traveling fronts in each layer, whose speeds are increased when coupling between layers is considered. Studying the effects of noise, we find coupling also serves to reduce the variance in the position of traveling fronts, as long as the noise sources to each layer are not completely correlated. Neural fields with asymmetric connectivity support traveling pulses whose speeds are decreased by interlaminar coupling. Again, coupling reduces the variance in traveling pulse position, when noise is considered that is not totally correlated between layers. To derive our stochastic results, we employ a small-noise expansion, also assuming interlaminar connectivity scales similarly. Our asymptotic results agree reasonably with accompanying numerical simulations.
description: 14 pages, 11 figures
Determining the approximate time to fill the hole channel from Maxwell's quasi-demon as a property of ideal gas in the equilibrium state
Creators: name: Semikolenov, Andrey V.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Thermodynamics
subject: 20304 Thermodynamics and Statistical Physics
subject: FOS: Mechanical engineering
subject: 100799 Nanotechnology not elsewhere classified
subject: FOS: Nanotechnology

description: Results of calculation of formula values (27)
Relative homotopy approach to topological phases in quantum walks
Creators: name: Grudka, Andrzej
name: Karczewski, Marcin
name: Kurzynski, Pawel
name: Wojcik, Jan
name: Wojcik, Antoni
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Discrete-time quantum walks (DTQWs) provide a convenient platform for a realisation of many topological phases in noninteracting systems. They often offer more possibilities than systems with a static Hamiltonian. Nevertheless, researchers are still looking for DTQW symmetries protecting topological phases and for definitions of appropriate topological invariants. Although majority of DTQW studies on this topic focus on the so called split-step quantum walk, two distinct topological phases can be observed in more basic models. Here we infer topological properties of the basic DTQWs directly from the mapping of the Brillouin zone to the Bloch Hamiltonian. We show that for translation symmetric systems they can be characterized by a homotopy relative to special points. We also propose a new topological invariant corresponding to this concept. This invariant indicates the number of edge states at the interface between two distinct phases.
description: 6 pages
Eumerus cavitibius Rondani 1850
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Eumerus
Eumerus cavitibius

description: Eumerus cavitibius Rondani, 1850
ORIGINAL DESCRIPTION: 1850a: 120 (key), 126 (description).
TYPE LOCALITY: “ in colle sub-apennino ditionis parmensis [Parmese sub-Apennine hill (Italy)]”.
TYPE MATERIAL: 1 ♂, syntype (missing right fore- and mid-legs) (MZUF: Box 4): Eumerus Mgn / emarginatus Lw. cavitibius Rnd. / 143.
CURRENT STATUS: junior synonym of Eumerus emarginatus Loew, 1848 (Peck 1988: 156, Belcari et al. 1995a: 14).
REMARKS: Rondani (1850a: 126) described Eumerus cavitibius from just the male sex, without specifying the exact number of specimens, but giving a single measurement of length: “ Mas semel captus [The male once collected]”. We found one syntype in this study. The subsequent spelling “ clavitibius ” has been used (Rondani 1857: 87, Verrall 1901: 106, Séguy 1961: 209) but it is not in prevailing usage (Kertész 1910: 314, Bezzi & Stein 1907: 134, Sack 1932: 400, Peck 1988: 156, O’Hara et al. 2011: 207). Therefore, the original spelling “ cavitibius ” is to be used and “ clavitibius ” is an incorrect subsequent spelling.
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 248, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Ballistic transport in graphene grown by chemical vapor deposition
Creators: name: Calado, V. E.
name: Zhu, Shou-En
name: Goswami, S.
name: Xu, Q.
name: Watanabe, K.
name: Taniguchi, T.
name: Janssen, G. C. A. M.
name: Vandersypen, L. M. K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this letter we report the observation of ballistic transport on micron length scales in graphene synthesised by chemical vapour deposition (CVD). Transport measurements were done on Hall bar geometries in a liquid He cryostat. Using non-local measurements we show that electrons can be ballistically directed by a magnetic field (transverse magnetic focussing) over length scales of ~μm. Comparison with atomic force microscope measurements suggests a correlation between the absence of wrinkles and the presence of ballistic transport in CVD graphene.
Canadian Gallup Poll # 482-1
Creators: name: Canadian Institute Of Public Opinion (Gallup)
Publisher: name: Roper Center for Public Opinion Research
Year: 2020

description: Federal election vote intent(1); past federal elections vote(1); public financing of election campaigns(1); government spending and taxes(1); nuclear war(1); disposable income(1); labor unions(1); government-sponsored lotteries(5); best choice for Prime Minister(1); Euthanasia(1).
Global Collaboration and the Future of the OCLC Cooperative
Creators: name: Neal, James G.
Publisher: name: Columbia University
Year: 2007
Subjects: Library science
Information science

description: "I was originally asked to attend this Members Council program to provide an update on our progress in advancing RLG programs as part of OCLC. Then your president, Ernie Ingles, contacted me and indicated that this was not acceptable and that a talk exploring the future of the organization and its strategic and global role was required. A relatively comfortable and innocent assignment became this challenging and provocative treatise. I was born professionally, like many in this audience, during the infancy of OCLC in the late 1960s and 1970s. You know what they say about those wonderful years—if you remember them, you weren't there. We have lived through OCLC's adolescence and now its full maturity as a global enterprise serving the library community's voracious appetite for cost-effective access to worldwide information. I have been involved, like you, in its regional networks. I have served on and chaired its Research Libraries Advisory Council. I addressed the Members Council in 1993 when the most controversial topic was boxed wine at the receptions. I fought OCLC as part of the "Save MARC" group during the battle over the copyrighting of the database. And now I chair the board committee on RLG Programs and serve on the RLG Program Council. Clearly, we all have OCLC in our professional genes and see our success as libraries serving our communities as intimately bundled up in OCLC's vitality and relevance. As Martin Buber once noted, we no longer just stand side by side, but with one another. My plan this afternoon is to outline briefly a context for my ideas and then to describe a series of things that I want from OCLC: first, I will identify the things I want OCLC to [End Page 263] watch and observe with more intensity; second, I will list the things that I want OCLC to sense and feel with more passion; and then third, I will enumerate the things that I want OCLC to commit to and to do with more investment." -- page 263
Protoplanetary disks in the Orion Nebula Cluster: FUV radiation effects
Creators: name: Díaz, Javiera
Publisher: name: Zenodo
Year: 2020

description: Many stars are formed within stellar clusters, and for that reason, their disks evolve being affected by the radiation of neighbor stars. The study of cases like those, where the protoplanetary disk is not isolated and is embedded in regions with external factors that can change their chemical evolution, are important because they would constrain the protoplanetary disk evolution, and thus the planet formation. The aim of this research is to analyze the effects of external FUV radiation on disk chemistry. We present ALMA Band 6 observations of CO isotopologues, HCN, DCN, H2CO, C2H, and C3H2 at 0.12 angular resolution toward a survey of four protoplanetary disks located in the Orion Nebula Cluster, where the radiation field is dominated by the massive and young O-type star, ?¹ Ori. This analysis is possible because the sources are located at different distances from the star, receiving different amounts of FUV radiation, so we can quantify this effect. An additional feature of these disks is that the sources are still embedded in the parent molecular cloud, then the molecular line emission is more difficult to detect.
Eumerus delicatae Rondani 1850
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Eumerus
Eumerus delicatae

description: Eumerus delicatae Rondani, 1850
ORIGINAL DESCRIPTION: 1850a: 120 (key), 127 (description).
TYPE LOCALITY: “ in insula Melita … in colle ditionis parmensis [Malta Island … Parmese hill (Italy)]”.
TYPE MATERIAL: 1 ♂, syntype (MZUF: Box 4): Eumerus Mgn / pulchellus Lw. delicatae Rnd., Melita / 145.
CURRENT STATUS: junior synonym of Eumerus pulchellus Loew, 1848 (Peck 1988: 161, Belcari et al. 1995a: 16).
REMARKS: Rondani (1850a: 127) described both sexes of Eumerus delicatae without specifying the exact number of specimens and not giving a range of lengths: “ Frequens in insula Melita; a Dom. Antonio Schembri … collectus, … Foeminam semel legi ego quoque in colle ditionis parmensis [Common in Malta Island; collected by Mr. Antonio Schembri, once I collected the female in Parmese hill]”. Rondani attributed the species name to Schembri. We found one male syntype in this study. The female type was not found and is presumed lost.
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 249, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Meaning in life and positive impact - Testing a fourth factor to the measure of Meaning In Life (version with more attention checks).
Creators: name: Fuhrer, Joffrey
name: Cova, Florian
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: In this study, our goal is to test the hypothesis that adding a fourth factor (Impact) to current measures of Meaning In Life will improve our assessment of Meaning In Life. More precisely, we hypothesize that (i) Impact will significantly predict Meaning in Life even when controlling for the three traditional factors, that (ii) adding Impact to the predictors of meaning in life will significantly improve prediction of Meaning in Life, that (iii) a four-factor structure will be a better fit of the data than a 1-factor, 2-factor, and 3-factor structure, and (iv), there will be a positive correlation between the facet Impact and the intrinsic aspiration Community contributions. This study is similar to the one preregistered to the one preregistered under the name "Meaning in life and positive impact - Testing a fourth factor to the measure of Meaning In Life". However, due to the very high correlations between the different facets of Meaning in Life we observed in this study, we feared the presence of a response bias, and increased the number of attention checks (including more discrete attention checks) in the present study.
Time resolved spectral analysis of the prompt emission of long gamma ray bursts with GeV Emission
Creators: name: Rao, A. R.
name: Basak, Rupal
name: Bhattacharya, J.
name: Chandra, S.
name: Maheshwari, N.
name: Choudhury, M.
name: Misra, Ranjeev
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We make a detailed time resolved spectroscopy of bright long gamma ray bursts (GRBs) which show significant GeV emissions (GRB 080916C, GRB 090902B, and GRB 090926A). In addition to the standard Band model, we also use a model consisting of a blackbody and a power-law to fit the spectra. We find that for the latter model there are indications for an additional soft component in the spectra. While previous studies have shown that such models are required for GRB 090902B, here we find that a composite spectral model consisting of two black bodies and a power law adequately fit the data of all the three bright GRBs. We investigate the evolution of the spectral parameters and find several generic interesting features for all three GRBs, like a) temperatures of the black bodies are strongly correlated to each other, b) flux in the black body components are strongly correlated to each other, c) the temperatures of the black body trace the profile of the individual pulses of the GRBs, and d) the characteristics of the power law component like the spectral index and the delayed onset bear a close similarity to the emission characteristics in the GeV regions. We discuss the implications of these results to the possibility of identifying the radiation mechanisms during the prompt emission of GRBs.
description: Accepted for publication in Research in Astronomy and Astrophysics
Isotropy in Group Cohomology
Creators: name: David, Nir Ben
name: Ginosar, Yuval
name: Meir, Ehud
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20J06, 20C25, 16S35, 20C05

description: The analogue of Lagrangians for symplectic forms over finite groups is studied, motivated by the fact that symplectic G-forms with a normal Lagrangian N
A New 1.4GHz Radio Continuum Map of the Sky South of Declination +25 deg
Creators: name: Calabretta, Mark R.
name: Staveley-Smith, Lister
name: Barnes, David G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Archival data from the HI Parkes All-Sky Survey (HIPASS) and the HI Zone of Avoidance (HIZOA) survey have been carefully reprocessed into a new 1.4GHz continuum map of the sky south of declination +25 deg. The wide sky coverage, high sensitivity of 40mK (limited by confusion), resolution of 14'.4 (compared to 51' for the Haslam et al. 408MHz and 35' for the Reich et al. 1.4GHz surveys), and low level of artefacts makes this map ideal for numerous studies, including: merging into interferometer maps to complete large-scale structures; decomposition of thermal and non-thermal emission components from Galactic and extragalactic sources; and comparison of emission regions with other frequencies. The new map is available for download.
description: 30 pages, 17 figures, 4 tables. Publications of the Astronomical Society of Australia, in press. Data products available from http://www.atnf.csiro.au/research/CHIPASS/
On Quantum Speedups for Nonconvex Optimization via Quantum Tunneling Walks
Creators: name: Liu, Yizhou
name: Su, Weijie J.
name: Li, Tongyang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Data Structures and Algorithms (cs.DS)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Classical algorithms are often not effective for solving nonconvex optimization problems where local minima are separated by high barriers. In this paper, we explore possible quantum speedups for nonconvex optimization by leveraging the global effect of quantum tunneling. Specifically, we introduce a quantum algorithm termed the quantum tunneling walk (QTW) and apply it to nonconvex problems where local minima are approximately global minima. We show that QTW achieves quantum speedup over classical stochastic gradient descents (SGD) when the barriers between different local minima are high but thin and the minima are flat. Based on this observation, we construct a specific double-well landscape, where classical algorithms cannot efficiently hit one target well knowing the other well but QTW can when given proper initial states near the known well. Finally, we corroborate our findings with numerical experiments.
description: 89 pages, 19 figures (full version)
Eumerus exilipes Rondani 1850
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Eumerus
Eumerus exilipes

description: Eumerus exilipes Rondani, 1850
ORIGINAL DESCRIPTION: 1850a: 119 (key), 121 (description).
TYPE LOCALITY: “ in Italia centrali [central Italy]”.
TYPE MATERIAL: 5 ♂♂, syntypes (MZUF: Box 4): Eumerus Mgn / argyropus Lw. exilipes Rnd., ♂ / 127; 3 ♀♀, syntypes (MZUF: Box 4): Eumerus Mgn / argyropus Lw. exilipes Rnd., ♀ / 127.
CURRENT STATUS: junior synonym of Eumerus argyropus (Loew, 1848) (Peck 1988: 154, Belcari et al. 1995a: 14).
REMARKS: Rondani (1850a: 121) described both sexes of Eumerus exilipes without specifying the exact number of specimens and not giving a range of lengths, but presumably from more than one specimen because he reported: “ non rarus [not rare]”. We found eight syntypes in this study.
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 249, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Effect of dust on Kelvin-Helmholtz instabilities
Creators: name: Hendrix, Tom
name: Keppens, Rony
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Dust is present in a large variety of astrophysical fluids, from tori around supermassive black holes to molecular clouds, protoplanetary discs, and cometary outflows. In many such fluids, shearing flows are present, leading to the formation of Kelvin-Helmholtz instabilities (KHI) and changing the properties and structures of the fluid through processes such as mixing and clumping of dust. We investigate how dust changes the growth rates of the KHI in 2D and 3D and how the it redistributes and clumps dust. We investigate if similarities can be found between the structures in 3D KHI and those seen in observations of molecular clouds. We do this by performing numerical hydrodynamical dust+gas simulations with in addition to gas a number of dust fluids. Each dust fluid represents a portion of the particle size-distribution. We study how dust-to-gas mass density ratios between 0.01 and 1 alter the growth rate in the linear phase of the KHI. We do this for a wide range of perturbation wavelengths, and compare these values to the analytical gas-only growth rates. As the formation of high-density dust structures is of interest in many astrophysical environments, we scale our simulations with physical quantities similar to values in molecular clouds. Large differences in dynamics are seen for different grain sizes. We demonstrate that high dust-to-gas ratios significantly reduce the growth rate of the KHI, especially for short wavelengths. We compare the dynamics in 2D and 3D simulations, where the latter demonstrates additional full 3D instabilities during the non-linear phase, leading to increased dust densities. We compare the structures formed by the KHI in 3D simulations with those in molecular clouds and see how the column density distribution of the simulation shares similarities with log-normal distributions with power-law tails sometimes seen in observations of molecular clouds.
description: 14 pages, 20 figures
title: Algorithmique & Programmation
title: Objectifs spécifiques, critères et tâches
titleType: Subtitle
title: Algorithmique & Programmation
titleType: AlternativeTitle
Creators: name: Dionisio, Nabil
Publisher: name: Unknown
Year: 0
Subjects: subject: algorithmique et programmation
subject: objectif spécifique
subject: objectif opérationnel
subject: critère de réussite
subject: indicateur
subject: activité

description: Que faut-il enseigner dans un cours d’algorithmique et programmation, destiné à des élèves de 1re année école de culture générale ? La réponse à cette question nécessite, entre autres, la définition des objectifs d’apprentissage à atteindre par les élèves. Ce travail de mémoire vise donc à définir des objectifs spécifiques d’enseignement de l’algorithmique et programmation, des critères pour les apprécier, des activités pour les mettre en oeuvre et des indicateurs pour mesurer leurs atteintes. Pour ce faire, nous avons tout d’abord décrit le contexte et les perspectives d’enseignement de l’informatique au secondaire II. Puis, nous avons présenté les éléments théoriques que nous avons utilisés pour approfondir notre compréhension des notions liées au concept d’objectif. Ensuite, nous avons défini les objets d’apprentissage et leurs caractéristiques, qui nous ont servi à formuler les objectifs spécifiques. Enfin, nous avons créé des activités permettant de contextualiser les objectifs spécifiques et les critères.
Radiative damping and emission signatures of strong superluminal waves in pulsar winds
Creators: name: Mochol, Iwona
name: Kirk, John G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyse the damping by radiation reaction and by Compton drag of strong, superluminal electromagnetic waves in the context of pulsar winds. The associated radiation signature is found by estimating the efficiency and the characteristic radiation frequencies. Applying these estimates to the gamma-ray binary containing PSR B1259-63, we show that the GeV flare observed by Fermi-LAT can be understood as inverse Compton emission by particles scattering photons from the companion star, if the pulsar wind termination shock acquires a precursor of superluminal waves roughly 30 days after periastron. This constrains the mass-loading factor of the wind $μ=L/\dot{N}mc^2$ (where $L$ is the luminosity and $\dot{N}$ the rate of loss of electrons and positrons) to be roughly $6\times 10^4$.
description: minor revisions, accepted for publication in ApJ
A Semidefinite Programming algorithm for the Quantum Mechanical Bootstrap
Creators: name: Berenstein, David
name: Hulsey, George
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a semidefinite program (SDP) algorithm to find eigenvalues of Schrödinger operators within the bootstrap approach to quantum mechanics. The bootstrap approach involves two ingredients: a nonlinear set of constraints on the variables (expectation values of operators in an energy eigenstate), plus positivity constraints (unitarity) that need to be satisfied. By fixing the energy we linearize all the constraints and show that the feasability problem can be presented as an optimization problem for the variables that are not fixed by the constraints and one additional slack variable that measures the failure of positivity. To illustrate the method we are able to obtain high-precision, sharp bounds on eigenenergies for arbitrary confining polynomial potentials in 1-D.
description: 4 pages, 2 figures
The effectiveness of peer tutoring in the field of teaching basic astronomical concept among older preschoolers and young pupils. A quantitative analysis
Creators: name: Jelinek, Jan
Publisher: name: figshare
Year: 2020
Subjects: Education

description: Peer tutoring as an educational method requires an appropriate application. Teachers need to know strengths and weaknesses of it. In the article, the effectiveness of this method in the context of teaching basic astronomical content (N = 28 pairs of children) was analyzed. The analysis took into account the difference in knowledge levels between children in a tutoring pair and social openness. Studies have shown that the most effective were those couples in which the difference in astronomical knowledge was greater, as well as the relationship between children, in which the teacher-child is withdrawn, and the child-pupil is more active.
Resettlement and Rehabilitation: A Theorical Retrospective on Michael Cernea’s Framework
Creators: name: Bhagath Chandra, N.
Publisher: name: figshare
Year: 2022
Subjects: subject: 160801 Applied Sociology, Program Evaluation and Social Impact Assessment
subject: FOS: Sociology
subject: Sociology
subject: 160802 Environmental Sociology
subject: 160804 Rural Sociology
subject: 160808 Sociology and Social Studies of Science and Technology

description: Michael Cernea is a sociologist and anthropologist born in Romania who reestablished himself in the USA in 1974 where he has since lived and is widely recognized for introducing sociological and anthropological approaches into the World Bank. He worked as the World Bank's Senior Adviser for Sociology and Social Policy until 1997. At the World Bank, Cernea gradually recruited, established and led a large community of development sociologists and anthropologists, placing these social disciplines on the World Bank’s intellectual map and broadening its skill mix. Cernea decisively helped to gain a place for development-oriented social research in the Bank and professional, applied sociological work in Bank’s operations. He authored, or contributed to defining and writing, some of the Bank's main social policies, particularly its policies on involuntary population resettlement, on indigenous populations, protection of “chance finds” cultural artifacts, cooperation with NGOs, the World Bank strategy for cultural heritage preservation and management, water and irrigation, reforestation, agricultural extension, and others. In this context, his theoretical framework of “development-induced displacement and resettlement” is being retrospect vis-à-vis dams, displacement and rehabilitation.
Measurement-based direct quantum feedback control in an open quantum system
Creators: name: Yan, Yan
name: Zou, Jian
name: Xu, Bao-Ming
name: Li, Jun-Gang
name: Shao, Bin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a general quantum system interacting with a bath and derive a master equation in the Lindblad form describing the evolution of the whole quantum system subjected to a measurement-based direct quantum feedback control (MDFC). As an example, we consider a qubit coupled with a dephasing environment under the MDFC. We show that for any given pure target state we can always find the corresponding MDFC scheme which can effectively drive any initial state into this target state. And by using appropriate MDFC scheme with weak measurement we can stabilize a single qubit initially prepared in one of two nonorthogonal states against dephasing noise. Furthermore, we can effectively protect a kind of known mixed states composed of two nonorthogonal states by using the corresponding MDFC scheme.
description: 7 pages,5 figures
Dynamics of Natural Killer cell receptor revealed by quantitative analysis of photoswitchable protein
Creators: name: Pageon, Sophie V.
name: Aquino, Gerardo
name: Lagrue, Kathryn
name: Köhler, Karsten
name: Endres, Robert G.
name: Davis, Daniel M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Natural Killer (NK) cell activation is dynamically regulated by numerous activating and inhibitory surface receptors that accumulate at the immune synapse. Quantitative analysis of receptor dynamics has been limited by methodologies which rely on indirect measurements such as fluorescence recovery after photobleaching. Here, we report a novel approach to study how proteins traffic to and from the immune synapse using NK cell receptors tagged with the photoswitchable fluorescent protein tdEosFP, which can be irreversibly photoswitched from a green to red fluorescent state by ultraviolet light. Thus, following a localized switching event, the movement of the photoswitched molecules can be temporally and spatially resolved by monitoring fluorescence in two regions of interest. By comparing images with mathematical models, we evaluated the diffusion coefficient of the receptor KIR2DL1 (0.23 +- 0.06 micron^2/s) and assessed how synapse formation affects receptor dynamics. Our data conclude that the inhibitory NK cell receptor KIR2DL1 is continually trafficked into the synapse and remains surprisingly stable there. Unexpectedly however, in NK cells forming synapses with multiple target cells simultaneously, KIR2DL1 at one synapse can relocate to another synapse. Thus, our results reveal a previously undetected inter-synaptic exchange of protein.
description: 25 pages, 5 figures