cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Myth of Lepanto and Its Literary Representations in European Epic Poetry of the late Cinquecento-early Seicento
Creators: name: Shakhray, Maria
Publisher: name: AOQU (Achilles Orlando Quixote Ulysses). Journal on Epic
Year: 2020

description: Stimulated by fundamental historical events, such as the Oriental war and especially its culminating moment – the legendary naval triumph of Lepanto –, the European epic tradition of the late Cinquecento and early Seicento underwent profound changes. The very adoption of the recent historical facts as a subject for epic poetry meant a radical deviation from the traditional path, as it made the authors of “modern” heroic epic abandon classical models and venture into bold poetic experiments. This article aims to analyse some of the most important aspects and tendencies privileged by the authors of three texts belonging to the Italian, French and Spanish epic traditions: La Christiana vittoria maritima by Francesco Bolognetti, L’Austriade by Pierre de Deimier and La Austríada by Juan Rufo. The present work is an attempt at identifying formal and semantic differences and affinities in the poetic discourse of the new historical, political, military and ideological reality, while having a closer look at the nature of the new ferments accounting for the profound innovation of the traditional epic topoi – a process that according to Mikhail Bakhtin, constitutes the essential condition for the continuous renaissance and evolution of any literary genre.
description: AOQU (Achilles Orlando Quixote Ulysses). Journal on Epic, N. 2 (2020): Epica marina
Global survey of star clusters in the Milky Way -- VII. Tidal parameters and mass function
Creators: name: Just, Andreas
name: Piskunov, Anatoly E.
name: Klos, Jonathan H.
name: Kovaleva, Dana A.
name: Polyachenko, Evgeny V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We built Galactic open star cluster mass functions (CMFs) for different age sub-samples in the wider solar neighbourhood. We present a simple cluster formation and evolution model to reproduce the main features of the CMFs. We used an unbiased sample of 2227 clusters of the Milky Way Star Cluster (MWSC) catalogue, which occupy the heliocentric cylinders with magnitude-dependent completeness radii of 1-5 kpc. We derived tidal masses of clusters with an accuracy of 70%. Our cluster formation and evolution model is based on the cluster initial mass function, the cluster formation rate, cluster mass loss due to stellar evolution and the clusters' dynamical evolution in the Galactic tidal field. The obtained tidal masses have been added to the MWSC catalogue. A general CMF (GCMF), built for all cluster ages around the Sun, extends over four decades in mass. The high-mass slope is +1.14. The CMFs for different age groups show the same high-mass slopes, while the low-mass slope is flat for the youngest sub-sample and about -0.7 for the others. The sub-samples inside and outside the solar Galactocentric radius are consistent with the GCMF, once the exponential decline of the Galactic disc density is taken into account. The model suggests star formation with low efficiency of 15%, where 10% of stars remain bound in a cluster after gas expulsion and violent relaxation. The cluster formation rate required to reproduce the observed age-mass-distribution is 0.4 solar masses per square pc and Gyr. The obtained high-mass slope of the GCMF for the wide solar neighbourhood is similar to slopes determined in nearby galaxies. The MWSC catalogue supports models with low star-formation efficiency, where 90% of stars are lost quickly after gas expulsion. The cluster formation rate corresponds to open clusters' contribution to the stellar content of the thin disc of 30%.
description: Accepted for publication in A&A, 18 pages, 13 figures
Momentum-space classification of topologically stable Fermi surfaces.
Creators: name: Sheinbaum Frank, Daniel
Publisher: name: University of British Columbia
Year: 2015

description: The purpose of the present work is to derive a classification for topologically stable Fermi surfaces for translationally invariant systems with no electron-electron interactions. To derive such a classification we introduce the necessary concepts in condensed matter and electronic band theory as well as those in mathematics such as topological spaces, building up to topological K-theory and its connections with Fredholm operators. We further compute such classes when there is only translational invariance for dimensions d = 1, 2, 3 and discuss the inclusion of other symmetries.
MILS Platform PP Modules
Creators: name: Ortega, Alvaro
name: Kurth, Helmut
name: Hohenegger, Andreas
name: Caracuel, Benito
name: Rico, Jose Emilio
name: Garcia, Luis
name: Blasum, Holger
name: Tverdyshev, Sergey
Publisher: name: Zenodo
Year: 2018
Subjects: MILS platform
PP module
Base PP

description: This is a list of extensions to the certMILS base PP (https://www.zenodo.org/record/2586499) that are available as modules in the modular PP. Note: The extensions are a research output from the certMILS project. That is, despite being a sincere effort that we have submitted to further feedback (https://zenodo.org/record/2541464), they have not undergone Common Criteria certification. This document is the deliverable D2.2. A PP-Module refers to a Base Protection Profile (or Base-PP) that provides the definition of the TOE type and the mandatory requirements to be fulfilled. A PP-Module has to be used with the Base-PPs: a PP-Module may introduce new elements to the Base-PPs and may also refine or interpret some of the elements of the Base-PP. A modular Protection Profile (PP) is used to evaluate products with security targets according to PP configurations, which consist of a base Protection Profile and zero or more PP modules. The associated Base-PP is defined in D2.1. Whereas an ST always describes a specific TOE, a PP is intended to describe a TOE type (in this case, separation kernel OS). The same PP may therefore be used as a template for many different STs to be used in different evaluations. This "PP Modules" D2.2 document makes reference to the PP Modules that have been defined as output of the task 2.2 within WP2. For better usability by the CC community, each PP Module is edited as a separate document.
description: This deliverable is research output from the certMILS project. It has not undergone Common Criteria certification.
Testing the Gravitational Redshift with Atomic Gravimeters?
Creators: name: Wolf, Peter
name: Blanchet, Luc
name: Bordé, Christian J.
name: Reynaud, Serge
name: Salomon, Christophe
name: Cohen-Tannoudji, Claude
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Atom interferometers allow the measurement of the acceleration of freely falling atoms with respect to an experimental platform at rest on Earth's surface. Such experiments have been used to test the universality of free fall by comparing the acceleration of the atoms to that of a classical freely falling object. In a recent paper, Müller, Peters and Chu [Nature {\bf 463}, 926-929 (2010)] argued that atom interferometers also provide a very accurate test of the gravitational redshift (or universality of clock rates). Considering the atom as a clock operating at the Compton frequency associated with the rest mass, they claimed that the interferometer measures the gravitational redshift between the atom-clocks in the two paths of the interferometer at different values of gravitational potentials. In the present paper we analyze this claim in the frame of general relativity and of different alternative theories, and conclude that the interpretation of atom interferometers as testing the gravitational redshift at the Compton frequency is unsound. The present work is a summary of our extensive paper [Wolf et al., arXiv:1012.1194, Class. Quant. Grav. 28, 145017, (2011)], to which the reader is referred for more details.
description: Contribution to the proceedings of the joint European Time and Frequency Forum and IEEE Frequency Control Symposium, 2011. Summary of the extensive paper arXiv:1012.1194, Class. Quant. Grav. 28, 145017, (2011)
The Evryscope Fast Transient Engine: Real-Time Detection for Rapidly Evolving Transients
Creators: name: Corbett, Hank
name: Carney, Jonathan
name: Gonzalez, Ramses
name: Fors, Octavi
name: Galliher, Nathan
name: Glazier, Amy
name: Howard, Ward S.
name: Law, Nicholas M.
name: Quimby, Robert
name: Ratzloff, Jeffrey K.
name: Soto, Alan Vasquez
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Astrophysical transients with rapid development on sub-hour timescales are intrinsically rare. Due to their short durations, events like stellar superflares, optical flashes from gamma-ray bursts, and shock breakouts from young supernovae are difficult to identify on timescales that enable spectroscopic followup. This paper presents the Evryscope Fast Transient Engine (EFTE), a new data reduction pipeline designed to provide low-latency transient alerts from the Evryscopes, a North-South pair of ultra-wide-field telescopes with an instantaneous footprint covering 38% of the entire sky, and tools for building long-term light curves from Evryscope data. EFTE leverages the optical stability of the Evryscopes by using a simple direct image subtraction routine suited to continuously monitoring the transient sky at minute cadence. Candidates are produced within the base Evryscope two-minute cadence for 98.5% of images, and internally filtered using VetNet, a convolutional neural network real-bogus classifier. EFTE provides an extensible, robust architecture for transient surveys probing similar timescales, and serves as the software testbed for the real-time analysis pipelines and public data distribution systems for the Argus Array, a next generation all-sky observatory with a data rate 62x higher than Evryscope.
description: 28 pages, 18 figures. in press, ApJS
The politics of anger in Roman society : a study of orators and emperors, 70 BCE-68 CE
Creators: name: Knight, Jayne Elizabeth
Publisher: name: University of British Columbia
Year: 2015

description: This dissertation examines the sociopolitical dynamics of anger in Roman public life during the late Republic and early Principate, specifically within the professional contexts of the orator and the emperor. I am interested in Roman thought on the pragmatic functions of anger during this time period. Evidence for how anger was employed by orators and emperors is drawn from a broad range of Roman prose sources. My analysis is both philological and historical in nature. I examine how the Latin lexicon of anger is deployed by authors and consider how diction functions in the representation of political anger. My analysis acquires a chronological shape as I trace the ways in which Roman discourse about the roles of anger in public life changes during the transition from Republic to Principate. Chapter 1 provides methodological background and contextualizes this project within the subfield of ancient emotion studies. Concepts taken from emotions history are defined and adapted for usage in Roman contexts. Chapter 2 discusses the Latin lexicon of anger and its relationship with ancient philosophical understandings of anger. Chapter 3 is the first of two chapters on anger in Ciceronian oratory. It features discussions of In Verrem 1, In Catilinam 1-2, Pro Murena, and Pro Milone. These case studies reveal how Cicero approached anger as an advocate and a consul. Chapter 4 examines Cicero’s treatment of anger late in his career in the Caesarianae and the Philippics. Chapter 5 presents sources on the anger of Augustus and explores how the first emperor developed an imperial emotional persona. I demonstrate that a balance between expressions of anger and displays of mercy was important to this persona. Chapter 6 considers how the remaining Julio-Claudian emperors employed anger in their regimes, with an eye toward their adaptation and/or perversion of the standard set by Augustus. This dissertation expands our understanding of Roman thought on anger, which has traditionally been accessed through the lens of philosophical writings on emotion. It demonstrates that anger is represented in many sources as an essential tool of both public speaking and imperial leadership at Rome.
Spin Path Integrals and Generations
Creators: name: Brannen, C. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Physics (physics.gen-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spin of a free electron is stable but its position is not. Recent quantum information research by G. Svetlichny, J. Tolar, and G. Chadzitaskos have shown that the Feynman \emph{position} path integral can be mathematically defined as a product of incompatible states; that is, as a product of mutually unbiased bases (MUBs). Since the more common use of MUBs is in finite dimensional Hilbert spaces, this raises the question "what happens when \emph{spin} path integrals are computed over products of MUBs?" Such an assumption makes spin no longer stable. We show that the usual spin-1/2 is obtained in the long-time limit in three orthogonal solutions that we associate with the three elementary particle generations. We give applications to the masses of the elementary leptons.
description: 20 pages, 2 figures, accepted at Foundations of Physics
Security testing framework: strategy and approach
Creators: name: Schulz, Thorsten
name: Hohenegger, Andreas
name: Persson, Staffan
name: Ortega, Alvaro
name: Hametner, Reinhard
name: Paulitsch, Michael
name: Gries, Caspar
name: Tverdyshev, Sergey
name: Blasum, Holger
name: Tomáš, Kertis
Publisher: name: Zenodo
Year: 2017
Subjects: security framework
security testing
analysis
fuzz-test methodology

description: This deliverable evaluates the state of the art in security testing techniques in relation to relevant industrial security standards. The research starts with a survey of non-industrial security frameworks and general identification of security vulnerabilities. We then have a look into the different testing contexts covered by Common Criteria requirements and IEC62443 standards and certification schemes. This is also brought into context with the certMILS application pilots and the applicability to testing of compositions as the fundamental architecture of a MILS system. Future work will focus on refining features of the testing framework for security testing of operating system components.The strategy for these activities is outlined in the third chapter, together with a short study of the technical feasibility.
An Atlas of Color-selected Quiescent Galaxies at $z>3$ in Public $JWST$ Fields
Creators: name: Valentino, Francesco
name: Brammer, Gabriel
name: Gould, Katriona M. L.
name: Kokorev, Vasily
name: Fujimoto, Seiji
name: Jespersen, Christian Kragh
name: Vijayan, Aswin P.
name: Weaver, John R.
name: Ito, Kei
name: Tanaka, Masayuki
name: Ilbert, Olivier
name: Magdis, Georgios E.
name: Whitaker, Katherine E.
name: Faisst, Andreas L.
name: Gallazzi, Anna
name: Gillman, Steven
name: Gimenez-Arteaga, Clara
name: Gomez-Guijarro, Carlos
name: Kubo, Mariko
name: Heintz, Kasper E.
name: Hirschmann, Michaela
name: Oesch, Pascal
name: Onodera, Masato
name: Rizzo, Francesca
name: Lee, Minju
name: Strait, Victoria
name: Toft, Sune
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of a systematic search for candidate quiescent galaxies in the distant Universe in eleven $JWST$ fields with publicly available observations collected during the first three months of operations and covering an effective sky area of $\sim145$ arcmin$^2$. We homogeneously reduce the new $JWST$ data and combine them with existing observations from the $Hubble\,Space\,Telescope$. We select a robust sample of $\sim80$ candidate quiescent and quenching galaxies at $3 < z < 5$ using two methods: (1) based on their rest-frame $UVJ$ colors, and (2) a novel quantitative approach based on Gaussian Mixture Modeling of the $NUV-U$, $U-V$, and $V-J$ rest-frame color space, which is more sensitive to recently quenched objects. We measure comoving number densities of massive ($M_\star\geq 10^{10.6} M_\odot$) quiescent galaxies consistent with previous estimates relying on ground-based observations, after homogenizing the results in the literature with our mass and redshift intervals. However, we find significant field-to-field variations of the number densities up to a factor of $2-3$, highlighting the effect of cosmic variance and suggesting the presence of overdensities of red quiescent galaxies at $z>3$, as it could be expected for highly clustered massive systems. Importantly, $JWST$ enables the robust identification of quenching/quiescent galaxy candidates at lower masses and higher redshifts than before, challenging standard formation scenarios. All data products, including the literature compilation, are made publicly available.
description: 15 pages, 6 Figures + Appendix. Accepted for publication in ApJ on Feb, 9. Data release: - Reduced HST+JWST mosaics + photometric catalogs and Eazy-py modeling: https://erda.ku.dk/archives/7166d013c1ca1371aac3c57b9e73190d/published-archive.html - Supplementary material and tables: https://zenodo.org/record/7614908#.Y-4ZruzMLmE - MAST: https://doi.org/10.17909/g3nt-a370 - See also Gould et al. 2023
Does interparent similarity matter? The associations of parents' attributions and parenting practices with child behaviour
Creators: name: Park, Joanne Lee
Publisher: name: University of British Columbia
Year: 2015

description: Research on parenting stresses the importance of parent attributions and parenting practices. However, much of the literature has focused on the relationships between parent attributions, harsh/overreactive discipline, and child behaviour problems, and has for the most part neglected interrelations with lax/inconsistent parenting practices. Moreover, little is known about the linkages between mother and father attributions and parenting practices, and child behaviour problems within a family-systems context. The purpose of this thesis was, therefore, to examine whether mothers’ and fathers’ negative attributions are related to child behaviour problems and whether these relationships are mediated by mothers’ and fathers’ lax parenting practices. In addition, this thesis utilizes a family-systems perspective by examining interparent similarity of attributions and parenting practices and by considering each of the above variables within the context of both parents’ individual variables. A community sample of 148 couples and their 9- to 12-year-old child (50% boys) participated in the study. Mothers and their child participated by completing questionnaires, and by completing an observed laboratory interaction task. Fathers participated by completing the same questionnaires as mothers. Results showed that mothers’ attributions and lax parenting practices were significantly associated with child behaviour problems, with no mediation by lax parenting. However, the relationship between fathers’ attributions and child behaviour problems was mediated by fathers’ lax parenting. After controlling for the other parent, as well as interparent similarity of attributions and parenting practices, only mothers’ and fathers’ lax parenting were associated with child behaviour problems. When interparent similarity was examined categorically, fathers’ negative attributions and parenting practices appeared to be particularly important. These findings suggest that both parents play important roles, but that children may be particularly sensitive to fathers’ parenting.
«A grant navie outre la mer» (v. 2256): la battaglia navale di Wistasse il monaco
Creators: name: Lecco, Margherita
Publisher: name: AOQU (Achilles Orlando Quixote Ulysses). Rivista di epica
Year: 2020

description: Wistasse le Moine – romanzo del XIII secolo in langue d’oïl – è narrazione, a metà tra realtà storica e invenzione letteraria, di un personaggio realmente vissuto, Eustache Busket, signore di alcune terre nella regione di Boulogne-sur-Mer, sul Canale della Manica. Il racconto delle sue avventure nella lotta contro il Conte di Boulogne Renaud de Dammartin, che lo aveva depredato dei suoi possedimenti feudali, viene a fondersi con eventi reali, intercorsi tra i regni d’Inghilterra e di Francia. La lotta è densa di trucchi e tiri, sino a quando il romanzo si chiude riferendo gli autentici fatti della vita di Wistasse, culminati nella battaglia di Sandwich (1217), dove gli Inglesi vinsero i Francesi, e Wistasse-Eustache, comandante della flotta francese, venne sconfitto e ucciso.
description: AOQU (Achilles Orlando Quixote Ulysses). Rivista di epica, N. 2 (2020): Epica marina
Your Digital Presence – Increasing Your Impact with Citations and Collaborations
Creators: name: Stall, Shelley
name: Erdmann, Christopher
Publisher: name: Zenodo
Year: 2021
Subjects: Digital Presence
ORCID
Data Citation
Software Citation

description: This presentation and recording were prepare for the EGU 2021 Meeting as part of the Data Help Desk. Connect your research to your data, software and institution. Optimize your digital presence, increase discovery of your work to potential collaborators and partners, and receive credit when others use your work. Recording: https://youtu.be/bftzPnFdtHk (YouTube) This work is part of the Building New Tools for Data Sharing and Re-use through a Transnational Investigation of the Socioeconomic Impacts of Protected Areas (PARSEC) project with funding provided by the Belmont Forum through the National Science Foundation, Grant 1929464 as well as the Accelerating Open and FAIR Data Practices Across the Earth, Space, and Environmental Sciences: A Pilot with the NSF to Support Public Access to Research Data project funded by the National Science Foundation, Grant 2025364. Version 2:  Updated the Digital Presence Checklist image and DOI. Also updated the link for setting up auto-update with your ORCID. The new link is: https://data.agu.org/2021/09/21/digital-presence-orcid.html
description: Special thank you to Solange Santos, Francine Curivil, and Jennifer Goncalves of SciELO who are members of the PARSEC project and provided recommendations on improvements.
Thoracic surgery as a nursing specialty : perceptions of senior nurses and surgeons of specialist nursing practice
Creators: name: Wilson, Angela Marie
Publisher: name: University of British Columbia
Year: 2015

description: With the continual advances in medical technology and specialized procedures, surgical patients have increasingly complex and specific needs. The questions that surfaces are: 1) Do surgical nurses now require advanced knowledge and skills to meet the needs of the thoracic surgery patient population? 2) And if so, do nurses and surgeons perceive value in recognizing thoracic surgery as a specialty for nurses? In this study, the perceptions of senior thoracic nurses and surgeons regarding nursing specialization were examined. Nurses’ and surgeons’ perceptions of what characterize a nursing specialty, if and why they consider thoracic surgery a nursing specialty, and what they identify as the outcomes and value of nursing specialization and related outcomes were also explored. An inductive approach was used, with data collected through a quantitative web-based questionnaire, using the 18-item Perceived Value of Certification Tool © (PVCT) as well as specific additional Likert scale and multiple-choice questions related to thoracic surgery. Study findings revealed that thoracic nurses and surgeons value nurse certification for similar intrinsic and extrinsic reasons as nurses in other specialties and in other countries, identifying several intrinsic rewards, such as “enhances feelings of personal accomplishment,” “provided a professional challenge,” and “validates specialized knowledge,” as motivators for certification. Findings from this study also suggest that nurses and surgeons perceive that additional nursing education related to knowledge and skills is required to meet the care needs of the thoracic surgery patient population, and improve the overall nursing care provided. Additionally, study results also suggested that nurses and surgeons believe that nursing specialty recognition may promote better patient outcomes. Finally, study findings demonstrated that thoracic nurses and surgeons believe that thoracic surgery should be formally recognized as a certified nursing specialty.
Duality and Fluxes in the Sen Formulation of Self-Dual Fields
Creators: name: Lambert, Neil
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In Sen's formulation of self-dual fields one finds two closed forms: $H^{(g)}$ and $H^{(s)}$. Only the former couples to sources and the spacetime metric. The latter has the wrong sign kinetic term but decouples and hence might be regarded as an unphysical artifact. In this letter we illustrate how an electromagnetic duality associated to the potential for $H^{(s)}$ gives rise to a T-like duality in the partition function for $H^{(g)}$. We then compute the partition function on a (4k+2)-dimensional torus highlighting its dependence on the choice of flux of $H^{(s)}$. Lastly we compute the two-point function of Wilson Surface operators.
description: 20 pages, Typos corrected, to appear in PLB
Approximate action-angle variables for the figure-eight and other periodic three-body orbits
Creators: name: Suvakov, Milovan
name: Dmitrasinovic, V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We use the maximally permutation symmetric set of three-body coordinates, that consist of the "hyper-radius" $R = \sqrt{ρ^{2} + λ^{2}}$, the "rescaled area of the triangle" $\frac{\sqrt 3}{2 R^2} |{\bm ρ} \times {\bm λ}|$) and the (braiding) hyper-angle $ϕ= \arctan(\frac{2{\bm ρ} \cdot {\bm λ}}{λ^2 - ρ^2})$, to analyze the "figure-eight" choreographic three-body motion discovered by Moore \cite{Moore1993} in the Newtonian three-body problem. Here ${\bm ρ}, {\bm λ}$ are the two Jacobi relative coordinate vectors. We show that the periodicity of this motion is closely related to the braiding hyper-angle $ϕ$. We construct an approximate integral of motion ${\bar{G}}$ that together with the hyper-angle $ϕ$ forms the action-angle pair of variables for this problem and show that it is the underlying cause of figure-eight motion's stability. We construct figure-eight orbits in two other attractive permutation-symmetric three-body potentials. We compare the figure-eight orbits in these three potentials and discuss their generic features, as well as their differences. We apply these variables to two new periodic, but non-choreographic orbits: One has a continuously rising $ϕ$ in time $t$, just like the figure-eight motion, but with a different, more complex periodicity, whereas the other one has an oscillating $ϕ(t)$ temporal behavior.
description: 11 pages, 19 figures
Ultra-high resolution observations of plasmoid-mediated magnetic reconnection in the deep solar atmosphere
Creators: name: van der Voort, L. Rouppe
name: van Noort, M.
name: Rodriguez, J. de la Cruz
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. To effectively trace magnetic reconnection below the canopy of chromospheric fibrils, we analyzed unique spectroscopic observations of Ellerman bombs in the H-alpha line. We analyzed a 10 min dataset of a young emerging active region observed with the prototype of the Microlensed Hyperspectral Imager (MiHI) at the Swedish 1-m Solar Telescope (SST). The MiHI instrument is an integral field spectrograph that is capable of achieving simultaneous ultra-high resolution in the spatial, temporal and spectral domains. With the combination of the SST adaptive optics system and image restoration techniques, MiHI can deliver diffraction limited observations if the atmospheric seeing conditions allow. The dataset samples the H-alpha line over 4.5 A with 10 mA/pix, with 0.065"/pix over a field of view of 8.6" x 7.7", and at a temporal cadence of 1.33s. This constitutes a hyperspectral data cube that measures 132 x 118 spatial pixels, 456 spectral pixels, and 455 time steps. There were multiple sites with Ellerman bomb activity associated with strong magnetic flux emergence. The Ellerman bomb activity is very dynamic, showing rapid variability and small-scale substructure. We found a number of plasmoid-like blobs with full-width-half-maximum sizes between 0.1" - 0.4" and moving with apparent velocities between 14 and 77 km/s. Some of these blobs have Ellerman bomb spectral profiles with a single peak at a Doppler offset between 47 and 57 km/s. Our observations support the idea that fast magnetic reconnection in Ellerman bombs is mediated by the formation of plasmoids. These MiHI observations demonstrate that a micro-lens based integral field spectrograph is capable of probing fundamental physical processes in the solar atmosphere.
description: accepted for publication in A&A. Movies can be found at https://www.mn.uio.no/astro/english/people/aca/rouppe/movies/
Finding Shortest Path for Developed Cognitive Map Using Medial Axis
Creators: name: Farhan, Hazim A.
name: Owaied, Hussein H.
name: Al-Ghazi, Suhaib I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: this paper presents an enhancement of the medial axis algorithm to be used for finding the optimal shortest path for developed cognitive map. The cognitive map has been developed, based on the architectural blueprint maps. The idea for using the medial-axis is to find main path central pixels; each center pixel represents the center distance between two side boarder pixels. The need for these pixels in the algorithm comes from the need of building a network of nodes for the path, where each node represents a turning in the real world (left, right, critical left, critical right...). The algorithm also ignores from finding the center pixels paths that are too small for intelligent robot navigation. The Idea of this algorithm is to find the possible shortest path between start and end points. The goal of this research is to extract a simple, robust representation of the shape of the cognitive map together with the optimal shortest path between start and end points. The intelligent robot will use this algorithm in order to decrease the time that is needed for sweeping the targeted building.
description: 9 pages
Large- and small-signal average modeling of dual active bridge dc-dc converter considering power losses
Creators: name: Zhang, Kai
Publisher: name: University of British Columbia
Year: 2015

description: Detailed switching models are commonly used for analysis of power electronic converters, whereas the average-value modeling (AVM) provides an efficient way to study the power electronic systems in large and small signal sense. This thesis considers a dual-active-bridge (DAB) DC-DC converter, as this topology is very common in applications that require bi-directional power flow and galvanic isolation between the input (primary) and output (secondary) sides. Although this type of converter is very common, the available state-of-the-art models often relay on many assumptions and neglect the losses, which make such models inaccurate for studies where the converter efficiency and small- and large-signal responses must be predicted with high fidelity in system-level studies. We first present an improved detailed model of the DAB DC-DC converter by including the conduction loss, switching loss and core loss, which are derived based on the conventional phase shift modulation approach while considering the energy conservation principle. According to the proposed methodology, the equivalent resistances representing switching loss and core loss have been appropriately derived and added to the final simplified circuit model. The proposed approach is simple to use for modeling DAB converters when considering non-ideal circuit components. The new detailed model increases the accuracy in efficiency predictions over wide range of converter operating conditions. Furthermore, this thesis presents a new reduced-order AVM that includes the parasitic resistance and input/output filters. Based on the large-signal AVM, the small-signal model and control-to-output transfer function are also derived. The proposed AVM is compared with full-order generalized average model and the detailed model in predicting large-signal transients in time domain and small-signal analysis in frequency domain. Experimental prototype of a 150W, 24/48 VDC DAB converter has been designed and built to validate the proposed modeling methodologies. The experimental results confirm that the proposed detailed and average-value models yield high accuracy in predicting the power losses and time-domain responses, which represents an improvement over the existing state-of-the-art models.
Evolutionary and Observational Properties of Red Giant Acoustic Glitch Signatures
Creators: name: Saunders, David
name: Ong, Joel
name: Basu, Sarbani
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: While solar-like oscillations in red giants have been observed at massive scale by the Kepler mission, few features of these oscillation mode frequencies, other than their global properties, have been exploited for stellar characterization. The signatures of acoustic glitches in mode frequencies have been used for studying main-sequence stars, but the validity of applying such techniques to evolved red giants, particularly pertaining to the inclusion of nonradial modes, has been less well-examined. Making use of new theoretical developments, we characterize glitches using the $π$ modes associated with red giant stellar models, and use our procedure to examine for the first time how properties of the He II acoustic glitch -- specifically its amplitude and associated acoustic depth -- vary over the course of evolution up the red giant branch, and with respect to other fundamental stellar properties. We find that the acoustic depths of these glitches, in conjunction with other spectroscopic information, discriminates between red giants in the first-ascent and core-helium-burning phases. We critically reexamine previous attempts to constrain acoustic glitches from nonradial (in particular dipole) modes in red giants. Finally, we apply our fitting procedure to Kepler data, to evaluate its robustness to noise and other observational systematics.
description: 15 pages, 12 figures; accepted to ApJ
AGN feedback in an infant galaxy cluster: the LOFAR-Chandra view of the giant FRII radio galaxy J103025+052430 at z=1.7
Creators: name: Brienza, M.
name: Gilli, R.
name: Prandoni, I.
name: D'Amato, Q.
name: Rajpurohit, K.
name: Calura, F.
name: Chiaberge, M.
name: Comastri, A.
name: Iwasawa, K.
name: Lanzuisi, G.
name: Liuzzo, E.
name: Marchesi, S.
name: Mignoli, M.
name: Miley, G.
name: Norman, C.
name: Peca, A.
name: Raciti, M.
name: Shimwell, T.
name: Tozzi, P.
name: Vignali, C.
name: Vitello, F.
name: Vito, F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the nearby universe jets from AGN are observed to have a dramatic impact on their surrounding extragalactic environment. Their effect at the `cosmic noon' (z>1.5), the epoch when star formation and AGN activity peak, is instead much less constrained. Here we present a study of the giant (750 kpc) radio galaxy 103025+052430 located at the centre of a protocluster at redshift z=1.7, with a focus on its interaction with the external medium. We present new LOFAR observations at 144 MHz, which we combine with VLA 1.4 GHz and 0.5-7 keV Chandra archival data. The new map at 144 MHz confirms that the source has a complex morphology, possibly consistent with the `hybrid morphology' classification. The large size of the source gave us the possibility to perform a resolved radio spectral index analysis, a very unique opportunity for a source at such high redshift. This reveals a tentative flattening of the radio spectral index at the edge of the backflow in the Western lobe, which might be indicating plasma compression. The spatial coincidence between this region and the thermal X-ray bubble C suggests a causal connection between the two. Contrary to previous estimates for the bright X-ray component A, we find that inverse Compton scattering between the radio-emitting plasma of the Eastern lobe and the CMB photons can account for a large fraction (~45%-80%) of its total 0.5-7 keV measured flux. Finally, the X-ray bubble C, which is consistent with a thermal origin, is found to be significantly overpressurised with respect to the ambient medium. This suggests that it will tend to expand and release its energy in the surroundings, contributing to the overall intracluster medium heating. Overall, 103025+052430 gives us the chance to investigate the interaction between AGN jets and the surrounding gas in a system that is likely the predecessor of the rich galaxy clusters we all well know at z=0.
description: 12 pages, 5 figures, 2 tables, accepted for publication in A&A
Correcting Imaging Atmospheric Cherenkov Telescope data with atmospheric profiles obtained with an elastic light detecting and ranging system
Creators: name: Schmuckermaier, Felix
name: Gaug, Markus
name: Fruck, Christian
name: Moralejo, Abelardo
name: Hahn, Alexander
name: Prester, Dijana Dominis
name: Dorner, Daniela
name: Font, Lluís
name: Mićanović, Saša
name: Mirzoyan, Razmik
name: Paneque, David
name: Pavletić, Lovro
name: Sitarek, Julian
name: Will, Martin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. We are operating an elastic LIDAR for the monitoring of atmospheric conditions during regular observations of the MAGIC Telescopes. Aims. We present and evaluate methods to convert aerosol extinction profiles, obtained with the LIDAR, into corrections of the reconstructed gamma-ray event energy and Instrument Response Functions of Imaging Atmospheric Cherenkov Telescopes. Methods. We assess the performance of these correction schemes with almost seven years of Crab Nebula data taken by the MAGIC Telescopes under various zenith angles and different aerosol extinction scenarios of Cherenkov light. Results. The methods enable the reconstruction of data taken under non-optimal atmospheric conditions with aerosol transmissions down to around 0.65 with systematic uncertainties comparable to those for data taken under optimal conditions. For the first time, the correction of data affected by clouds has been included in the assessment. The data can also be corrected when the transmission is lower than 0.65, but the results are less accurate and suffer from larger systematics.
description: 25 pages, 20 figures, 4 tables, accepted for publication in Astronomy & Astrophysics
Binge eating and drinking in young women : personality correlates and psychophysiological indices of emotion processing
Creators: name: Dominelli, Rachelle
Publisher: name: University of British Columbia
Year: 2015

description: The disinhibited behaviours of binge eating and binge drinking are associated with significant negative consequences. Impulsivity and emotion dysregulation are commonly posited to underlie engagement in these behaviours. To advance our understanding of these behaviours in young women, the studies identified unique impulsive personality contributions and advanced emotion regulation theories of these behaviours through psychophysiological assessment. Study one examined unique relationships between binge behaviours, traits derived from Reinforcement Sensitivity Theory and those derived from the Urgency Premeditation Perseverance Sensation Seeking-Positive Urgency (UPPS-P) Impulsive Behavior Scale. Reward Sensitivity was associated with both behaviours while Punishment Sensitivity had differential relationships with the binge types. Negative Urgency was the greatest predictor of binge eating, Sensation Seeking had the strongest relationship with binge drinking, and Lack of Perseverance was a common predictor for both types of bingeing. These findings support trait emotion regulation conceptualizations. In study two, emotion reactivity and emotion regulation ability were examined within the context of a picture viewing startle blink paradigm. While a broad deficit in the ability to regulate emotional states across psychophysiological response systems was not supported, subtle differences in response duration, regulation of valence versus arousal and response coherence warrant further investigation. Study three examined emotion response coherence between the psychophysiological measures, (i.e. startle blink, corrugator activity, late positive potential), and subjective ratings of the emotion stimuli. Though stability of relationships was limited by small samples, results were suggestive of similar patterns of coherence amongst non-bingeing and binge drinking women with a possible alteration of coherence in binge eating women. Overall, the findings suggest that maladaptive affective responses that are evident on trait-based assessments may not translate into deficits in the ability to regulate brief emotional states. Emotion dysregulation may be limited to interpersonally-relevant emotional states or specific emotion-evoking stimuli. Application of these psychophysiological methods in paradigms using these more binge-specific stimuli may prove more sensitive to potential deficits in emotion regulation ability. These studies highlight the importance of a multi-component assessment of emotional processing in those with disinhibited bingeing behaviours.
What will be the Euclidean dimension of an Ising ferromagnetic cubic shell?
Creators: name: Tikader, Ishita
name: Acharyya, Muktish
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The equilibrium and nonequilibrium properties of an Ising ferromagnetic cubic shell have been extensively studied by Monte Carlo simulation using Metropolis single spin flip algorithm. Although, geometrically the Euclidean dimension of the cubical shell is three, interestingly, the Ising ferromagnetic cubic shell undergoes ferromagnetic phase transition at a temperature which is very close to that for two-dimensional Ising ferromagnet. Surprisingly, the Ising ferromagnetic cubic shell shows a strange (neither exponential nor stretched exponential) kind of relaxation behaviour, instead of exponential relaxation as usually observed in the two dimensional Ising ferromagnet. The metastable lifetime of a ferromagnetic Ising cubical shell is studied as a function of the applied magnetic field. Here also, the cubic shell behaves more likely a two-dimensional object as found from statistical analysis and comparison with Becker-Döring prediction of classical nucleation theory.
description: Journal of Magnetism and Magnetic Materials (2024) (in press)
Optical conductivity and vibrational spectra of the narrow-gap semiconductor FeGa$_3$
Creators: name: Martin, C.
name: Martinez, V. A.
name: Opačić, M.
name: Djurdjić-Mijin, S.
name: Mitrić, P.
name: Umićević, A.
name: Poudel, A.
name: Sydoryk, I.
name: Ren, Weijun
name: Martin, R. M.
name: Tanner, D. B.
name: Lazarević, N.
name: Petrovic, C.
name: Tanasković, D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Intermetallic narrow-gap semiconductors have been intensively explored due to their large thermoelectric power at low temperatures and a possible role of strong electronic correlations in their unusual thermodynamic and transport properties. Here we study the optical spectra and vibrational properties of $\mathrm{FeGa_3}$ single crystal. The optical conductivity indicates that $\mathrm{FeGa_3}$ has a direct band gap of $\sim 0.7$\,eV, consistent with density functional theory (DFT) calculations. Most importantly, we find a substantial spectral weight also below 0.4~eV, which is the energy of the indirect (charge) gap found in resistivity measurements and ab initio calculations. We find that the spectral weight below the gap decreases with increasing temperature, which indicates that it originates from the impurity states and not from the electronic correlations. Interestingly, we did not find any signatures of the impurity states in vibrational spectra. The infrared and Raman vibrational lines are narrow and weakly temperature dependent. The vibrational frequencies are in excellent agreement with our DFT calculations, implying a modest role of electronic correlations. Narrow M\" ossbauer spectral lines also indicate high crystallinity of the sample.
Ecological genomics of invasive thistle, diffuse knapweed
Creators: name: Turner, Kathryn Grace
Publisher: name: University of British Columbia
Year: 2015

description: Invasive species are able to move into new environments, with new abiotic conditions and biotic interactions, survive, and even dominate, often within a hundred years. Much research in invasion biology has assessed whether populations of invasive plants show phenotypic or evolved genetic differences in growth and reproduction compared to their native range (such as the evolution of increased competitive ability hypothesis), in an effort to understand the causal drivers of invasion. Using diffuse knapweed (Centaurea diffusa) I assessed evolution in its invaded range in multiple ways. Chapter 2 describes two greenhouse common garden experiments that evaluated phenotypic and life history trait variation between the two ranges under benign and stressful conditions (drought, flooding, nutrient deficiency, and herbivory). Invasive individuals grew larger and flowered later in benign conditions, and performed as well or better under most of the tested stress conditions than native individuals. The strongest evidence for a trade-off in tolerance was exhibited under drought conditions, but only among native populations. Chapter 3 employs a field common garden to compare phenotypes, drought response, and adaptation to environmental conditions in a more natural setting. This study incorporates a large dataset of occurrence locations to look at the different relationships that populations in the two ranges have to their bioclimatic environments. I found that invasive C. diffusa individuals were larger, matured later, and have lost adaptation to environmental conditions apparent in native populations. More plastic invasive genotypes may have expanded the climatic niche inhabited in the invaded range. Chapter 4 attempts to identify a genetic mechanism underlying these phenotypic changes by comparing gene expression between the two ranges under benign and drought conditions. Genes were identified whose expression either varied constitutively or responded to drought stress differently between ranges. Based on these data, invasive populations may have constitutively higher levels of energy production, while native populations have a stronger cellular drought defense. This dissertation presents ample evidence of evolution in the invaded range and suggests that plasticity and rapid evolution had a significant impact on the successful invasion of North America by C. diffusa.