cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Field-induced spin reorientation transitions in antiferromagnetic ring-shaped spin chains
Creators: name: Borysenko, Yelyzaveta A.
name: Sheka, Denis D.
name: Fassbender, Jürgen
name: Brink, Jeroen van den
name: Makarov, Denys
name: Pylypovskyi, Oleksandr V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Easy axis antiferromagnets are robust against external magnetic fields of moderate strength. Spin reorientations in strong fields can provide an insight into more subtle properties of antiferromagnetic materials, which are often hidden by their high ground state symmetry. Here, we investigate theoretically effects of curvature in ring-shaped antiferromagnetic achiral anisotropic spin chains in strong magnetic fields. We identify the geometry-governed helimagnetic phase transition above the spin-flop field between vortex and onion states. The curvature-induced Dzyaloshinskii-Moriya interaction results in the spin-flop transition being of first- or second-order depending on the ring curvature. Spatial inhomogeneity of the Néel vector in the spin-flop phase generates weak ferromagnetic response in the plane perpendicular to the applied magnetic field. Our work contributes to the understanding of the physics of curvilinear antiferromagnets in magnetic fields and guides prospective experimental studies of geometrical effects relying on spin-chain-based nanomagnets.
description: 11 pages, 6 figures
Fundamental Limitation on the Detectability of Entanglement
Creators: name: Liu, Pengyu
name: Liu, Zhenhuan
name: Chen, Shu
name: Ma, Xiongfeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entanglement detection is essential in quantum information science and quantum many-body physics. It has been proved that entanglement exists almost surely for a random quantum state, while the realizations of effective entanglement criteria usually consume exponential resources, and efficient criteria often perform poorly without prior knowledge. This fact implies a fundamental limitation might exist in the detectability of entanglement. In this work, we formalize this limitation as a fundamental trade-off between the efficiency and effectiveness of entanglement criteria via a systematic method to theoretically evaluate the detection capability of entanglement criteria. For a system coupled to an environment, we prove that any entanglement criterion needs exponentially many observables to detect the entanglement effectively when restricted to single-copy operations. Otherwise, the detection capability of the criterion will decay double-exponentially. Furthermore, if multi-copy joint measurements are allowed, the effectiveness of entanglement detection can be exponentially improved, which implies a quantum advantage in entanglement detection problems.
description: 17 pages, 7 figures
Investigating the near-criticality of the Higgs boson
Creators: name: Buttazzo, Dario
name: Degrassi, Giuseppe
name: Giardino, Pier Paolo
name: Giudice, Gian F.
name: Sala, Filippo
name: Salvio, Alberto
name: Strumia, Alessandro
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extract from data the parameters of the Higgs potential, the top Yukawa coupling and the electroweak gauge couplings with full 2-loop NNLO precision, and we extrapolate the SM parameters up to large energies with full 3-loop NNLO RGE precision. Then we study the phase diagram of the Standard Model in terms of high-energy parameters, finding that the measured Higgs mass roughly corresponds to the minimum values of the Higgs quartic and top Yukawa and the maximum value of the gauge couplings allowed by vacuum metastability. We discuss various theoretical interpretations of the near-criticality of the Higgs mass.
description: 43 pages, 7 figures. v3: updated with latest Higgs and top mass, corrected NNLO result for g2 and gY
Superconducting Solenoid System with Adjustable Shielding Factor for Precision Measurements of the Properties of the Antiproton
Creators: name: Devlin, Jack A.
name: Wursten, Elise
name: Harrington, James A.
name: Higuchi, Takashi
name: Blessing, Pascal E.
name: Borchert, Matthias J.
name: Erlewein, Stefan
name: Hansen, Jannek J.
name: Morgner, Jonathan
name: Bohman, Matthew A.
name: Mooser, Andreas H.
name: Smorra, Christian
name: Wiesinger, Markus
name: Blaum, Klaus
name: Matsuda, Yasuyuki
name: Ospelkaus, Christian
name: Quint, Wolfgang
name: Walz, Jochen
name: Yamazaki, Yasunori
name: Ulmer, Stefan
Publisher: name: College Park, Md. [u.a.] : American Physical Society
Year: 2019
Subjects: subject: Magnetic moments
subject: Solenoids
subject: Charge-to-mass ratios
subject: External magnetic field
subject: Penning trap
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: A superconducting self-shielding three-solenoid system with an adjustable shielding factor is developed, implemented, and characterized using a single antiproton in a Penning trap. With the tuned system, we suppress external magnetic field disturbances by up to a factor of 225 ± 15, allowing antiproton-to-proton charge-to-mass ratio comparisons with fourfold reduced frequency fluctuations and antiproton magnetic moment determinations with tenfold reduced uncertainty. © 2019 authors. Published by the American Physical Society.
Topological Type of Limit Laminations of Embedded Minimal Disks
Creators: name: Bernstein, Jacob
name: Tinaglia, Giuseppe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53A10 (Primary)

description: We consider two natural classes of minimal laminations in three-manifolds. Both classes may be thought of as limits - in different senses - of embedded minimal disks. In both cases, we prove that, under a natural geometric assumption on the three-manifold, the leaves of these laminations are topologically either disks, annuli or Moebius bands. This answers a question posed by Hoffman and White.
description: 21 pages. Published version
A Web of Extremism: How Anti-Government Extremists Survive Online Censorship
Creators: Romanek, Jakub
Publisher: name: University of Alberta Library
Year: 2023

This thesis explores how extremism manages to survive in moderated online spaces. This work follows the attempts of the Instagram platform to minimize the presence of the right-wing extremist groups, specifically the Boogaloo movement, as a means of understanding how such groups survive and proselytize in the face of censorship. Addressing this question is done through the use of a multi-sited virtual ethnography spanning the Instagram Boogaloo community, Telegram channels and other external links shared by the accounts within the sample group over the course of two years. Publicly available posts from relevant accounts were archived and subject to content analysis to provide a baseline understanding of the group’s ideology and determine existing and emergent themes in order to demonstrate the evolution of the group. Collection and analysis was a concurrent and cyclical process which yielded a deeper understanding of the Boogaloo movement’s ideology and the meaning behind the symbols employed by the group. Furthermore, the results of this work showcase that the longer the Boogaloo movement spent circumnavigating censorship, the more the group began to resemble other successful extremist groups. Subsequently the analysis was informed by social movement theory and new institutionalism to explain how extremist groups approach adversity and uncertainty in a similar fashion to how institutions behave, which ultimately leads to homogenization.
Scrambled Eggs: A Study of My Biraciality
Creators: Randle, Emma I.
Publisher: name: University of Alberta Library
Year: 2023

Throughout this project, I go through the process of researching, analyzing, and examining my identity as a biracial, half Asian and half white, woman living in Canada during the twenty-first century. I use a research creation methodology in order to combine academic research with autobiographical narratives and visual pieces. I begin by investigating the ways in which Western academia has historically conceived of multiracial individuals, often as dehumanized objects for study rather than people with subjectivity and important lived experiences. Next, using genealogical research conducted by two of my aunts, I trace the histories of both sides of my family. Here, I examine the migration of my maternal family to and from Hong Kong, and the immigration of my paternal family out of Europe to North America, in order to consider the personal and societal circumstances that brought together two families from very different backgrounds. Finally, I document experiences, emotions, and encounters from my own day to day life that have had a significant influence on both my identity and my relationships with my self and my biraciality. Overall, by examining my biraciality from a variety of perspectives and while writing and creating through this process, I seek to gain new insights into my identity and a better understanding of my experiences with trying to navigate the world in a racially ambiguous body.
A First Look at the Abundance Pattern -- O/H, C/O, and Ne/O -- in $z>7$ Galaxies with JWST/NIRSpec
Creators: name: Arellano-Córdova, Karla Z.
name: Berg, Danielle A.
name: Chisholm, John
name: Haro, Pablo Arrabal
name: Dickinson, Mark
name: Finkelstein, Steven L.
name: Leclercq, Floriane
name: Rogers, Noah S. J.
name: Simons, Raymond C.
name: Skillman, Evan D.
name: Trump, Jonathan R.
name: Kartaltepe, Jeyhan S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze the rest-frame near-UV and optical nebular spectra of three $z > 7$ galaxies from the Early Release Observations taken with the Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope (JWST). These three high-z galaxies show the detection of several strong-emission nebular lines, including the temperature-sensitive [O III] $λ$4363 line, allowing us to directly determine the nebular conditions and abundances for O/H, C/O, and Ne/O. We derive O/H abundances and ionization parameters that are generally consistent with other recent analyses. We analyze the mass-metallicity relationship (i.e., slope) and its redshift evolution by comparing between the three z > 7 galaxies and local star-forming galaxies. We also detect the C III] $λλ$1907,1909 emission in a z > 8 galaxy from which we determine the most distant C/O abundance to date. This valuable detection of log(C/O) = $-0.83\pm0.38$ provides the first test of C/O redshift evolution out to high-redshift. For neon, we use the high-ionization [Ne III] $λ$3869 line to measure the first Ne/O abundances at z>7, finding no evolution in this $α$-element ratio. We explore the tentative detection of [Fe II] and [Fe III] lines in a z>8 galaxy, which would indicate a rapid build up of metals. Importantly, we demonstrate that properly flux-calibrated and higher S/N spectra are crucial to robustly determine the abundance pattern in z>7 galaxies with NIRSpec/JWST.
description: Accepted for publication on ApJL
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).XIII. The role of ram-pressure stripping in transforming the diffuse and ultra-diffuse galaxies in the Virgo cluster
Creators: name: Junais
name: Boissier, S.
name: Boselli, A.
name: Ferrarese, L.
name: Côté, P.
name: Gwyn, S.
name: Roediger, J.
name: Lim, S.
name: Peng, E. W.
name: Cuillandre, J. -C.
name: Longobardi, A.
name: Fossati, M.
name: Hensler, G.
name: Koda, J.
name: Bautista, J.
name: Boquien, M.
name: Małek, K.
name: Amram, P.
name: Roehlly, Y.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Low-surface-brightness galaxies (LSBs) contribute to a significant fraction of all the galaxies in the Universe. Ultra-diffuse galaxies (UDGs) form a subclass of LSBs that has attracted a lot of attention in recent years (although its definition may vary between studies). Although UDGs are found in large numbers in galaxy clusters, groups, and in the field, their formation and evolution are still very much debated. Using a comprehensive set of multiwavelength data from the NGVS (optical), VESTIGE (H$α$ narrowband), and GUViCS (UV) surveys, we studied a sample of 64 diffuse galaxies and UDGs in the Virgo cluster to investigate their formation history. We analyzed the photometric colors and surface-brightness profiles of these galaxies and then compared them to models of galaxy evolution, including ram-pressure stripping (RPS) events to infer any possible strong interactions with the hot cluster gas in the past. While our sample consists mainly of red LSBs, which is typical in cluster environments, we found evidence of a color variation with the cluster-centric distance. Blue, HI-bearing, star-forming diffuse galaxies are found at larger distances from the cluster center than the rest of the sample. The comparison of our models with multifrequency observations suggests that most of the galaxies of the sample might have undergone a strong RPS event in their lifetime, on average 1.6 Gyr ago (with a large dispersion, and RPS still ongoing for some of them). This process resulted in the transformation of initially gas-rich diffuse blue galaxies into gas-poor and red ones that form the dominant population now, the more extreme UDGs having undergone the process in a more distant past on average. The RPS in dense environments could be one of the major mechanisms for the formation of the large number of quiescent UDGs we observe in galaxy clusters.
description: 57 pages, 14 Figures, accepted for publication in A&A
Stability of 41 metal - boron systems at 0 GPa and 30 GPa from first principles
Creators: name: Van Der Geest, A. G.
name: Kolmogorov, A. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A multitude of observed boron-based materials have outstanding superconducting, mechanical, and refractory properties. Yet, the structure, the composition, and the very existence of some reported metal boride (M-B) compounds have been a subject of extensive debate. This density functional theory work seeks to set a baseline for current understanding of known metal boride phases as well as to identify new synthesizable candidates. We have generated a database of over 12,000 binary M-B entries for pressures of 0 and 30 GPa producing the largest scan of compositions and systems in this materials class. The 175 selected crystal structures include both observed prototypes and new ones found with our evolutionary ground state search. The metals considered are: Al, Ag, Au, Ba, Be, Ca, Cd, Co, Cr, Cs, Cu, Fe, Hf, Hg, Ir, K, La, Li, Mg, Mn, Mo, Na, Nb, Ni, Os, Pd, Pt, Rb, Re, Rh, Ru, Sc, Sr, Ta, Tc, Ti, V, W, Y, Zn, and Zr. Based on the formation energy calculated at zero pressure and temperature 4 new M-B phases or structures have been predicted, while a number of previously reported compounds have been shown to be unstable. At 30 GPa, changes in the convex hulls are expected to occur in 18 out of 41 M-B systems, which is used to indicate regions of the periodic table (for metal borides) that require further investigation from the community. Analysis of the collected information has revealed a nearly linear relationship between the magnetic moment per atom and the metal content for all the Fe-B, Co-B, and Ni-B structures within 0.15 eV/atom of the stability tie line. Both GGA-PBE and LDA-PW functionals were used to provide an understanding of the systematic error introduced by the choice of the exchange-correlation functional.
Generalised versions of separable decompositions applicable to bipartite entangled quantum states
Creators: name: Anwar, Hussain
name: Jevtic, Sania
name: Rudolph, Oliver
name: Virmani, Shashank
Publisher: name: [Bad Honnef] : Dt. Physikalische Ges.
Year: 2019
Subjects: subject: quantum information
subject: entanglement
subject: separability
subject: local hidden variables
subject: cross norms
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The investigation of separable states in quantum theory has been driven by the notion that they are highly classical, in that they do not demonstrate nonlocality, and are in some contexts unable to support non-classical computation. The converse question, the extent to which entangled states do or do not support non-classical information processing, is less well understood. Motivated by this question we extend the notion of quantum separability into the entangled quantum states, by constructing separable decompositions that describe them with the 'smallest' possible sets of non-physical local operators. We consider a few ways to define the word 'smallest' and present techniques for obtaining them. The methods involve calculating certain forms of cross norm. The results generalise significantly the results obtained in our previous work on this topic (2015 New J. Phys. 17 093047), and can be be used to construct classical simulation methods and local hidden variable models for subsets of local measurements on entangled quantum states.
title: Grabungen und Überlegungen zur Instandsetzung des Langhauses der ehemaligen Klosterkirche Lobenfeld
Creators: name: Lutz, Dietrich
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 13, Nr. 1 (1984), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Effects of the environment on the multiplicity properties of stars in the STARFORGE simulations
Creators: name: Guszejnov, Dávid
name: Raju, Aman N.
name: Offner, Stella S. R.
name: Grudić, Michael Y.
name: Faucher-Giguère, Claude-André
name: Hopkins, Philip F.
name: Rosen, Anna L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Most observed stars are part of a multiple star system, but the formation of such systems and the role of environment and various physical processes is still poorly understood. We present a suite of radiation-magnetohydrodynamic simulations of star-forming molecular clouds from the STARFORGE project that include stellar feedback with varied initial surface density, magnetic fields, level of turbulence, metallicity, interstellar radiation field, simulation geometry and turbulent driving. In our fiducial cloud the raw simulation data reproduces the observed multiplicity fractions for Solar-type and higher mass stars, similar to previous works. However, after correcting for observational incompleteness the simulation under-predicts these values. The discrepancy is likely due to the lack of disk fragmentation, as the simulation only resolves multiples that form either through capture or core fragmentation. The raw mass distribution of companions is consistent with randomly drawing from the initial mass function for the companions of $>1\,\mathrm{M_\odot}$ stars, however, accounting for observational incompleteness produces a flatter distribution similar to observations. We show that stellar multiplicity changes as the cloud evolves and anti-correlates with stellar density. This relationship also explains most multiplicity variations between runs, i.e., variations in the initial conditions that increase stellar density (increased surface density, reduced turbulence) decrease multiplicity. While other parameters, such as metallicity, interstellar radiation, and geometry significantly affect the star formation history or the IMF, varying them produces no clear trend in stellar multiplicity properties.
description: 20 pages, 21 figures, submitted to MNRAS
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 13, Nr. 3 (1984), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
High-speed two-photon polymerization 3D printing with a microchip laser at its fundamental wavelength
Creators: name: Perevoznik, Dmitrii
name: Nazir, Rashid
name: Kiyan, Roman
name: Kurselis, Kestutis
name: Koszarna, Beata
name: Gryko, Daniel T.
name: Chichkov, Boris N.
Publisher: name: Washington, DC : Optica
Year: 2019
Subjects: subject: Laser mirrors
subject: Microprocessor chips
subject: Neodymium compounds
subject: Photons
subject: Photoresists
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: High-resolution, high-speed 3D printing by two-photon polymerization (2PP) with a Nd:YVO4 Q-switched microchip laser at its fundamental wavelength of 1064 nm is demonstrated. Polymerization scan speeds of up to 20 mm/s and feature sizes of 250 nm are achieved using a high repetition rate Q-switched microchip laser with a semiconductor saturable absorber mirror (SESAM) and photoresist with a new photo-initiator bearing 6-dialkylaminobenzufuran as electron donor and indene-1,3-dione moiety as electron acceptor. The obtained results demonstrate the high potential of Q-switched microchip lasers for applications in 2PP 3D printing.
Static near horizon geometries and rigidity of quasi-Einstein manifolds
Creators: name: Bahuaud, Eric
name: Gunasekaran, Sharmila
name: Kunduri, Hari K.
name: Woolgar, Eric
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Static vacuum near horizon geometries are solutions $(M,g,X)$ of a certain quasi-Einstein equation on a closed manifold $M$, where $g$ is a Riemannian metric and $X$ is a closed 1-form. It is known that when the cosmological constant vanishes, there is rigidity: $X$ vanishes and consequently $g$ is Ricci flat. We study this form of rigidity for all signs of the cosmological constant. It has been asserted that this rigidity also holds when the cosmological constant is negative, but we exhibit a counter-example. We show that for negative cosmological constant if $X$ does not vanish identically, it must be incompressible, have constant norm, and be nontrivial in cohomology, and $(M,g)$ must have constant scalar curvature and zero Euler characteristic. If the cosmological constant is positive, $X$ must be exact (and vanishing if $\dim M=2$). Our results apply more generally to a broad class of quasi-Einstein equations on closed manifolds. We extend some known results for quasi-Einstein metrics with exact 1-form $X$ to the closed $X$ case. We consider near horizon geometries for which the vacuum condition is relaxed somewhat to allow for the presence of a limited class of matter fields. An appendix contains a generalization of a result of Lucietti on the Yamabe type of quasi-Einstein compact metrics (with arbitrary $X$).
description: Version accepted for publication
Growth Narratives and Governance Dependencies in Resource Towns Fort McMurray as Case Study
Creators: Bafgeesh, Ahmed
Publisher: name: University of Alberta Library
Year: 2023

Oil sand development is the main economic engine in Alberta’s Regional Municipality of Wood Buffalo (RMWB). Large-scale boosterism and investments in oil sand projects have mainly driven the Municipality’s rapid growth during the path dependency of the last few decades. The rapid growth and increase in population, income, wealth and economic activity in the place cause a different scenario for societies and pressure on municipal services (Keough, 2015).

The dependency on a single resource and rapid development has led to cycles of ups and downs in income, workforce, and population in many places, particularly in the Canadian West (Van Assche et al., 2017). Therefore, the Municipality has faced several unique challenges, with the boom and bust in the oil industry and some difficulties of the natural disasters. The relationship between the province, the oil industry, and the local governments (first of Fort McMurray, then of the RMWB) is complex, with an initial alignment of the growth of a complete city housing a workforce for the oil sands, to a divergence with the province informally supporting the growth of work camps while appearing to restrict the growth of the Municipality.

In this thesis, I begin by reviewing processes in resource boomtowns, then briefly outline the history of Fort McMurray as a case study with the different scenarios of boom and bust in the area and explain how growth mentality and boosterism have shaped and driven the planning in the area with the evolution of the status in Fort McMurray since it became a New Town in 1964 focusing on the formal institutions in the local level. I then find the interdependency between the provincial government, oil companies and the Municipality, analyzing the dependencies in the governance of Fort McMurray with an understanding of the continuity and change in the evolution and ability of single-resource communities.
title: Die Villa rustica „Alter Weg" bei Großsachsen, Gemeinde Hirschberg, Rhein-Neckar-Kreis. Archäologische Denkmalpflege zwischen landwirtschaftlichen Bedürfnissen und öffentlichem Interesse
Creators: name: Schallmayer, Egon
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 15, Nr. 3 (1986), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Two and Three-Pion Quantum Statistics Correlations in Pb-Pb Collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV at the LHC
Creators: name: ALICE Collaboration
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Correlations induced by quantum statistics are sensitive to the spatio-temporal extent as well as dynamics of particle emitting sources in heavy-ion collisions. In addition, such correlations can be used to search for the presence of a coherent component of pion production. Two and three-pion correlations of same and mixed-charge are measured at low relative momentum to estimate the coherent fraction of charged pions in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV at the LHC with ALICE. The genuine three-pion quantum statistics correlation is found to be suppressed relative to the two-pion correlation based on the assumption of fully chaotic pion emission. The suppression is observed to decrease with triplet momentum. The observed suppression at low triplet momentum may correspond to a coherent fraction in charged pion emission of 23% $\pm$ 8%.
description: 29 pages, 9 captioned figures, 4 tables, authors from page 24, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/435
Temporal trends in acute kidney injury in a cohort of hospitalized Albertan patients
Creators: Dahiya, Anita
Publisher: name: University of Alberta Library
Year: 2023

Introduction: Acute kidney injury (AKI) is associated with significant morbidity and mortality. It affects approximately 4 to 7% of hospitalizations each year with a reported annual increase of 10% in incidence. Many studies have relied on administrative diagnostic codes to describe temporal trends in AKI, which have poor sensitivity in identifying AKI. Furthermore, few studies have shown demographic trends in AKI using serum creatinine-based definitions (KDIGO AKI).

Objective: We aimed to identify trends in AKI using diagnostic codes and KDIGO AKI and associated severity, mortality, and demographic changes over a 10-year study period. We also aimed to identify change in recognition of AKI through diagnostic codes during the study period.

Design, setting, and participants: The retrospective cohort was composed of adult patients admitted to hospital in Alberta, Canada from 2009 to 2018 using the Alberta Kidney Disease Network database.

Exposure/Measure: AKI was assessed using validated KDIGO AKI definitions and AKI diagnostic codes. AKI associated in-hospital acute dialysis, in-hospital all-cause mortality, and 90-day post discharge all-cause mortality were assessed. We used generalized linear models with a Gaussian family to determine the absolute rates of AKI and mortality by year of incidence. We determined the sensitivity and specificity of AKI diagnostic codes using KDIGO AKI definitions as the standard of reference.

Results: Between January 2009 and December 2018, we identified 348, 242 hospitalizations with an episode of AKI (12.3%). An increase in rates of AKI was seen using both AKI diagnostic codes and KDIGO AKI definitions with an unadjusted mean rate increase of 14.2/1000 hospitalizations [95% CI 12.7,15.6, p <0.01] noted in the latter. Stage 1 AKI was the most common (unadjusted mean rate 88.6/1000 hospitalizations [95% CI 88.2,89.0]). There was an overall decrease in in-hospital mortality across all stages of AKI with the greatest decrease noted in stage 3 AKI (unadjusted rate difference -80.8/1000 AKI Stage 3 hospitalizations [95% CI -94.9, -66.8]). Similar trends were identified in 90-day mortality. AKI diagnostic codes showed low sensitivity (24.6%), but high specificity (99%) with an improvement noted in AKI recognition over time (17.5% to 33%).

Conclusion: Overall, there has been an increase in rates of AKI in hospitalized patients, largely driven by mild forms of AKI. Despite the increasing rates of AKI, there has been a decrease in mortality, especially in the most severe forms of AKI. In combination with the trends in diagnostic coding, our findings suggest there has been better recognition and, likely as a result, better management of AKI over time.
Artificial Intelligence in the Creative and Cultural Sectors - The Case of Museum and Cultural Heritage
Creators: name: Caramiaux, Baptiste
Publisher: name: Zenodo
Year: 2022
Subjects: Artificial Intelligence
Cultural Heritage
Museums

description: Slides presented at the Conference "Cultures of Artifiical Intelligence - New Perspectives for Museums" in Karlsruhe (https://www.landesmuseum.de/en/conference-ai-2022) Based on the reports / white papers: (2019) "AI in the Media and Creative Industries" https://hal.inria.fr/hal-02125504/document (2020) "The Use of AI in the Cultural and Creative Sectors" https://op.europa.eu/en/publication-detail/-/publication/8bf8f299-f7c4-11ea-991b-01aa75ed71a1/language-en (2022) "Study on Opportunities and Challenges of AI Technologies for the Cultural and Creative Sectors" https://op.europa.eu/en/publication-detail/-/publication/359880c1-a4dc-11ec-83e1-01aa75ed71a1/language-en
title: Christoph Bertsch:... und immer wieder das Bild von den Maschinenrädern. Beiträge zu einer Kunstgeschichte der industriellen Revolution. Berlin, 1986
Creators: name: Fekete, Julius
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 15, Nr. 3 (1986), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Inhalt
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 17, Nr. 3 (1988), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Mitteilungen
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 23, Nr. 4 (1994), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Statistical model for collisions and recollisions of inertial particles in mixing flows
Creators: name: Gustavsson, K.
name: Mehlig, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Finding a quantitative description of the rate of collisions between small particles suspended in mixing flows is a long-standing problem. Here we investigate the validity of a parameterisation of the collision rate for identical particles subject to Stokes force, based on results for relative velocities of heavy particles that were recently obtained within a statistical model for the dynamics of turbulent aerosols. This model represents the turbulent velocity fluctuations by Gaussian random functions. We find that the parameterisation gives quantitatively good results in the limit where the \lq ghost-particle approximation' applies. The collision rate is a sum of two contributions due to \lq caustics' and to \lq clustering'. Within the statistical model we compare the relative importance of these two collision mechanisms. The caustic formation rate is high when the particle inertia becomes large, and we find that caustics dominate the collision rate as soon as they form frequently. We compare the magnitude of the caustic contribution to the collision rate to the formation rate of caustics.
description: 9 pages, 4 figures, final version as published
title: Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 24, Nr. 2 (1995), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
V de Aiken y alfa de Krippendorff de la rúbrica analítica para evaluar manuscritos científicos
Creators: name: Ventura-León, José
name: Mamani-Benito, Oscar
Publisher: name: figshare
Year: 2022
Subjects: subject: 130303 Education Assessment and Evaluation
subject: FOS: Educational sciences

description: Esta tabla es parte del artículo Diseño y validación de una rúbrica analítica para evaluar manuscritos científicos, que se obtuvo luego de la sistematización de nueve expertos que evaluaron la calidad del contenido de los indicadores, para comprobar su verificación se cálculo la V de Aiken y alfa de Krippendorff
From Settlement to Self-Determination: Towards an Anthropology of Education in Nunavut
Creators: Ertman, Selina
Publisher: name: University of Alberta Library
Year: 2023

Self-determination is a core concept framing the historical and ongoing efforts of Inuit in Nunavut seeking to align the territory’s social and political institutions with Inuit Qaujimajatuqangit (IQ), or Inuit ways of knowing, being and doing. Educational self-determination represents an important and urgent aspect of these efforts, especially in the context of colonial education policies and practices which have deeply affected generations of Inuit. In 2008, the Nunavut territorial government set out to be the first provincial or territorial jurisdiction in Canada to implement an Indigenous-led vision for education when it passed the Nunavut Education Act. However, the mandates outlined in this act have yet to be fulfilled, prompting organizations such as the Nunavut Tunngavik Inc. (NTI), the legal representative of

Inuit in Nunavut, to take recent action in an effort to advance Inuit control of education. In 2020, for instance, the NTI initiated a lawsuit against the Government of Nunavut based on cultural

and linguistic discrimination of Inuit in the education sector.

This thesis constitutes an anthropological study of self-determination and education in Nunavut from a historical and contemporary perspective. I incorporate a holistic framework and qualitative research methods including semi-structured interviews and archival analysis to address the following questions: 1) How has self-determination historically underpinned narratives about education in Nunavut? 2) How is self-determination part of ongoing discussions and initiatives regarding education in Nunavut? This research aims to increase scholarly understandings and public awareness of education and self-determination in Nunavut while highlighting Inuit perspectives. Fostering this understanding and awareness is crucial given that education and self-determination in Nunavut will only continue to be a site of evolving and complex negotiation, exploration, and tension in future years.
title: Veröffentlichungen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 24, Nr. 4 (1995), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Thermal effects on nuclear matter properties
Creators: name: Tonetto, Lucas
name: Benhar, Omar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A quantitative description of the properties of hot nuclear matter will be needed for the interpretation of the available and forthcoming astrophysical data, providing information on the post merger phase of a neutron star coalescence. We have employed a recently developed theoretical model, based on a phenomenological nuclear Hamiltonian including two- and three-nucleon potentials, to study the temperature dependence of average and single-particle properties of nuclear matter relevant to astrophysical applications. The possibility to represent the results of microscopic calculations using simple and yet physically motivated parametrisations of thermal effects, suitable for use in numerical simulations of astrophysical processes, is also discussed.
Superspace conformal field theory
Creators: name: Quella, Thomas
name: Schomerus, Volker
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Conformal sigma models and WZW models on coset superspaces provide important examples of logarithmic conformal field theories. They possess many applications to problems in string and condensed matter theory. We review recent results and developments, including the general construction of WZW models on type I supergroups, the classification of conformal sigma models and their embedding into string theory.
description: 50 pages; one table; several figures; Invited Review for a Special Edition of Journal of Physics A on Logarithmic Conformal Field Theory; v2: Included more explicit reference to superconformal Lie algebras
Recycling and Regeneration of Spent Lithium-ion Batteries
Creators: Vinayak, . Anil Kumar
Publisher: name: University of Alberta Library
Year: 2023

The exponential rise in demand for lithium-ion batteries (LIBs) in applications that include grid-level energy storage systems, portable electronic devices and electric vehicles, has led to logistical, and environmental challenges in the supply of raw materials required for its production and the management of end-of-life batteries. Lithium, cobalt, nickel and graphite are some of the raw materials critical to the production of LIBs and the primary source of these materials is mining operations which pose a multitude of environmental concerns as well as human rights concerns. Therefore, supplementing the supply chain of these raw materials via recycling from spent LIB can mitigate the above challenges to a certain degree while simultaneously providing a route for waste management in keeping with the principles of a circular economy. Hydro- and pyro-metallurgical techniques which are an extrapolation of extractive metallurgical methods are commercially employed presently to recycle the components of lithium-ion batteries in industrial scale. These conventional techniques currently employed for recycling LIBs are marred by environmental concerns due to their dependence on high temperatures and strong acids. These energy-intensive methods are known to produce harmful emissions and thus lack environmental friendliness. Moreover, the low purity of the recovered materials and low yields of the recovered metals render them inefficient. Given the exponential demand for LIBs and the resultant pressure on the environment, more sustainable and efficient recycling techniques are necessary to alleviate these environmental concerns and meet the needs of a growing market.

The first chapter of this thesis presents a literature review of the existing pre-treatment and recycling strategies employed for end-of-life batteries and discusses the advantages and disadvantages of each method. Additionally, the recent trends and progress in the domain are explored. The second chapter introduces the experimental work, results and discussion on the green approach designed to effectively and sustainably recycle the active materials in the electrode of a commercial spent LIB. Chapter 3 of this work details a partially successful attempt to directly regenerate spent NCM622 cathode material through the application of molten salt relithiation followed by hydrothermal treatment. In chapter four, a perspective on circular economies is presented with a focus on the incorporation of its principles for achieving a sustainable lithium-powered future. The challenges that currently hinder the development of a fully-realized circular economy for lithium-ion batteries are also discussed, along with ongoing efforts aimed at overcoming these challenges.
title: Das Treffen aller Studierenden der Ur-, Vor- und Frühgeschichte vom 06. - 09. Juni 1996 in Köln mit dem Titel "Archäologie - Studium und Praxis"
Creators: name: Claßen, Erich
name: Ickler, Sonja
name: Riemer, Heiko
Publisher: name: University Library Heidelberg
Year: 2014

description: [nicht vorhanden]
Evolution on neutral networks accelerates the ticking rate of the molecular clock
Creators: name: Manrubia, Susanna
name: Cuesta, José A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Large sets of genotypes give rise to the same phenotype because phenotypic expression is highly redundant. Accordingly, a population can accept mutations without altering its phenotype, as long as thegenotype mutates into another one on the same set. By linking every pair of genotypes that are mutually accessible through mutation, genotypes organize themselves into neutral networks (NN). These networks are known to be heterogeneous and assortative, and these properties affect the evolutionary dynamics of the population. By studying the dynamics of populations on NN with arbitrary topology we analyze the effect of assortativity, of NN (phenotype) fitness, and of network size. We find that the probability that the population leaves the network is smaller the longer the time spent on it. This progressive "phenotypic entrapment" entails a systematic increase in the overdispersion of the process with time and an acceleration in the fixation rate of neutral mutations. We also quantify the variation of these effects with the size of the phenotype and with its fitness relative to that of neighbouring alternatives.
description: 31 pages, 4 figures
Population activity of the superior colliculus and associated cardiovascular outputs
Creators: name: Eymael, Annaliese
Publisher: name: Macquarie University
Year: 2023
Subjects: Other education not elsewhere classified

description: Detecting and reacting to biologically significant stimuli is essential for the survival of all organisms. Orienting is the reflexive shift of the eyes and head towards salient events which precede stereotyped motor behaviours (e.g., freeze, flight, and pursuit) to produce an ecologically appropriate response based on sensory information gained from the external environment. Orienting is predominantly mediated by the superior colliculus (SC), a midbrain region responsible for sensory integration and motor command initiation. Sympathetic cardiovascular responses (increased blood pressure and heart rate) are also associated with orienting and believed to support the metabolic demands of stereotyped motor behaviours, however the extent of neural circuits that are involved remain unclear. The deeper lamina of the SC (dSC) has been proposed to drive cardiovascular control in orienting based on previous work where dSC stimulation evoked pressor responses and had formed the starting point for investigation in this thesis. The aim of this project was to further characterise the role of the dSC as a potential driver of cardiovascular activation. This was achieved via simultaneous fibre photometry-telemetry recordings of dSC neural activity and blood pressure responses during exposure to sensory stimuli to evoke orienting behaviour in conscious, head-fixed mice. It was hypothesised that a positive association would offer a naturalistic physiological context for previous work that examined the dSC through experimental electrical, chemical, and optogenetic stimulation. The genetically encoded calcium indicator (GECI), GCaMP, was injected into the dSC of wildtype C57BL/6J mice using an adeno-associated viral (AAV) delivery system and instrumented with a photometry optic fibre overlying the injection site. Head-fixation was achieved by clamping of the lightweight washer attached to the skull. The cohort (n=9) was telemetered and underwent a three-day experimental protocol consisting of exposure to auditory (white noise), visual (classic loom paradigm) and audiovisual (white noise and loom combined) stimuli. Photometry-telemetry recordings revealed significant increases in population-level dSC neural activity during the stimulus period that were accompanied by surges in systolic arterial pressure (sAP) and heart rate (HR). The correlation between the magnitudes of dSC activity and cardiovascular responses to sensory stimuli was however found to be weak, in contrast to orofacial whisking events that were synchronised to spikes in dSC activity during basal and stimulus-evoked behaviour.
A First Class Constraint Generates Not a Gauge Transformation, But a Bad Physical Change: The Case of Electromagnetism
Creators: name: Pitts, J. Brian
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: In Dirac-Bergmann constrained dynamics, a first-class constraint typically does not _alone_ generate a gauge transformation. Each first-class constraint in Maxwell's theory generates a change in the electric field E by an arbitrary gradient, spoiling Gauss's law. The secondary constraint p^i,_i=0 still holds, but being a function of derivatives of momenta (mere auxiliary fields), it is not directly about the observable electric field (a function of derivatives of A), which couples to charge. Only a special combination of the two first-class constraints, the Anderson-Bergmann-Castellani gauge generator G, leaves E unchanged. Likewise only that combination leaves the canonical action invariant---an argument independent of observables. If one uses a first-class constraint to generate instead a canonical transformation, one partly strips the canonical coordinates of physical meaning as electromagnetic potentials, vindicating the Anderson-Bergmann Lagrangian orientation of interesting canonical transformations. The need to keep gauge-invariant q,t-dH/dp=-E-p=0 supports using the gauge generator and primary Hamiltonian rather than the separate first-class constraints and the extended Hamiltonian. Partly paralleling Pons's criticism, it is shown that Dirac's proof that a first-class primary constraint generates a gauge transformation, by comparing evolutions from _identical_ initial data, cancels out and hence fails to detect the alterations made to the initial state. It also neglects the arbitrary coordinates multiplying the secondary constraints _inside_ the canonical Hamiltonian. Thus the gauge-generating property has been ascribed to the primaries alone. Hence the Dirac conjecture about secondary first-class constraints as generating gauge transformations rests upon a false presupposition about primary first-class constraints. Clarity about electromagnetism help with GR.