cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Cellulose-based Nanocomposite Aerogel/Hydrogel Materials for Wastewater Purification and Freshwater Generation by Interfacial Solar Evaporation
Creators: name: Ren, Yuxuan
Publisher: name: Schulich School of Engineering
Year: 2024
Subjects: subject: Cellulose
subject: Wastewater treatment
subject: Interfacial solar evaporation
subject: Clean water generation
subject: Engineering--Chemical

description: The freshwater shortage has become one of the most urgent and serious problems for the sustainable development of human society due to the limited quantity and huge demand. Thus, various kinds of technologies and corresponding materials have been studied and evaluated to either expand the freshwater source or enhance the utilization rate in the water cycle. Cellulose, as the most abundant biopolymer in nature, shows some unique characteristics like low cost, non-toxicity, and biodegradability, making it popular as a supporting material in water treatment. Integrated with different kinds of functional materials, the composites could be applied in relevant technologies for wastewater treatment and freshwater generation. In this thesis, cellulose-based composites were designed, fabricated, and applied in dye degradation, bacterial killing, and interfacial solar evaporation. For the dye degradation and bacterial killing, Copper-Benzenedicarboxylate (CuBDC) was grown on the skeleton of cellulose aerogels with a lightweight and porous structure. The composite aerogels showed effective catalytic degradation towards common dyes and good antibacterial performance towards various kinds of strains. As for interfacial solar evaporation, polypyrrole (PPy) was introduced on the wood-inspired cellulose aerogels with vertical channels by in-situ polymerization. The fabricated composite aerogels exhibited excellent evaporation performance under one sun illumination and good stability towards saline water due to efficient solar-thermal conversion, fast water transport, decreased enthalpy for water vaporization, and quick migration of salt ions. To further investigate the feasibility of interfacial solar evaporation applied in wastewater treatment, the fabricated PPy/cellulose aerogels were introduced to treat industrial wastewater from hydraulic fracturing operations with high salinity and complicated composition. The condensed water was collected by a purpose-made collector and showed dramatically improved quality compared with original wastewater. To design and fabricate interfacial solar evaporators with more complicated structures, carbon nanotubes (CNTs) were mixed with cellulose as the composite ink for 3D printing. The printed solar evaporator showed good performance and the impact of various parameters on evaporation performance was investigated. Research work in this dissertation indicates the great potential of cellulose-based materials applied in water purification and freshwater generation by interfacial solar evaporation, further prompting their applications in practice.
Moment-Based Evidence for Simple Rational-Valued Hilbert-Schmidt Generic 2 x 2 Separability Probabilities
Creators: name: Slater, Paul B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81P16, 81P40, 62E17, 44A60

description: Employing Hilbert-Schmidt measure, we explicitly compute and analyze a number of determinantal product (bivariate) moments |rho|^k |rho^{PT}|^n, k,n=0,1,2,3,..., PT denoting partial transpose, for both generic (9-dimensional) two-rebit (alpha = 1/2) and generic (15-dimensional) two-qubit (alpha=1) density matrices rho. The results are, then, incorporated by Dunkl into a general formula (Appendix D6), parameterized by k, n and alpha, with the case alpha=2, presumptively corresponding to generic (27-dimensional) quaternionic systems. Holding the Dyson-index-like parameter alpha fixed, the induced univariate moments (|rho| |rho^{PT}|)^n and |rho^{PT}|^n are inputted into a Legendre-polynomial-based (least-squares) probability-distribution reconstruction algorithm of Provost (Mathematica J., 9, 727 (2005)), yielding alpha-specific separability probability estimates. Since, as the number of inputted moments grows, estimates based on |rho| |rho^{PT}| strongly decrease, while ones employing |rho^{PT}| strongly increase (and converge faster), the gaps between upper and lower estimates diminish, yielding sharper and sharper bounds. Remarkably, for alpha = 2, with the use of 2,325 moments, a separability-probability lower-bound 0.999999987 as large as 26/323 = 0.0804954 is found. For alpha=1, based on 2,415 moments, a lower bound results that is 0.999997066 times as large as 8/33 = 0.242424, a (simpler still) fractional value that had previously been conjectured (J. Phys. A, 40, 14279 (2007)). Furthermore, for alpha = 1/2, employing 3,310 moments, the lower bound is 0.999955 times as large as 29/64 = 0.453125, a rational value previously considered (J. Phys. A, 43, 195302 (2010)).
description: 47 pages, 12 figures; slightly expanded and modified for journal publication; this paper incorporates and greatly extends arXiv:1104.0217
title: Understanding Leadership Development Among Newcomer Youth Through Sport Participation
Creators: name: Ali Bik, Assadullah
Publisher: name: Graduate Studies
Year: 2024
Subjects: subject: Leadership Development
subject: Newcomer Youth
subject: Sport Participation
subject: Pluralism
subject: Community
subject: Education
subject: Education--Teacher Training
subject: Social Structure and Development

description: This study focuses on the experience of the youth who immigrated to Canada from non- English speaking countries. The main aim is to build understanding on the potential occurrence of leadership development among these youth through sport participation. Sports such as soccer are viewed as a borderless activity, and for a newcomer youth whose entire life has changed, this avenue of familiarity may help to cultivate leadership development when other avenues may be limited. This study seeks to add to an area of academic literature by inquiring deeply into the specific intersection of newcomer youth to Canada, benefit of sport participation and leadership development. Using case study methodology, I interviewed 9 participants in total, all from the same organization which supports newcomer youth through sport and emphasizes leadership development. After gathering the qualitative evidence, I thematically analyzed the data to explore emergent themes. I conducted the analysis using a conceptual model of youth leadership development (Redmond & Dolan, 2016). Further, I thematically grouped aspects of their development that were not encompassed by the model. It was discovered that sport participation evoked emotions of comfort to the lives of the participants which allowed them to feel safe, secure and competent in their participation. Additionally, sport was an environment with ample support for newcomer youth. Finally, there were many holistic benefits beyond leadership development which sport brought to the lives of the newcomer youth participants. Collectively considering these gained benefits, it was evident that sport indeed was an avenue of leadership development for these newcomer youth.
Masses of Nearby Supermassive Black Holes with Very-Long Baseline Interferometry
Creators: name: Johannsen, Tim
name: Psaltis, Dimitrios
name: Gillessen, Stefan
name: Marrone, Daniel P.
name: Ozel, Feryal
name: Doeleman, Sheperd S.
name: Fish, Vincent L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Dynamical mass measurements to date have allowed determinations of the mass M and the distance D of a number of nearby supermassive black holes. In the case of Sgr A*, these measurements are limited by a strong correlation between the mass and distance scaling roughly as M ~ D^2. Future very-long baseline interferometric (VLBI) observations will image a bright and narrow ring surrounding the shadow of a supermassive black hole, if its accretion flow is optically thin. In this paper, we explore the prospects of reducing the correlation between mass and distance with the combination of dynamical measurements and VLBI imaging of the ring of Sgr A*. We estimate the signal to noise ratio of near-future VLBI arrays that consist of five to six stations, and we simulate measurements of the mass and distance of Sgr A* using the expected size of the ring image and existing stellar ephemerides. We demonstrate that, in this best-case scenario, VLBI observations at 1 mm can improve the error on the mass by a factor of about two compared to the results from the monitoring of stellar orbits alone. We identify the additional sources of uncertainty that such imaging observations have to take into account. In addition, we calculate the angular diameters of the bright rings of other nearby supermassive black holes and identify the optimal targets besides Sgr A* that could be imaged by a ground-based VLBI array or future space-VLBI missions allowing for refined mass measurements.
description: 8 pages, 4 figures, 2 tables, refereed version, accepted for publication in ApJ
title: Critical power estimation provides a good approximation of the power output associated with the maximal metabolic steady state in both trained and untrained participants
Creators: name: Lindstrom, Brynn Eric Alexander
Publisher: name: Graduate Studies
Year: 2024
Subjects: subject: Exercise
subject: Physiology
subject: FOS: Biological sciences
subject: Critical Power
subject: Maximal Metabolic Steady State
subject: Maximal Lactate Steady State
subject: Physiology
subject: Education--Health

description: Critical power (CP) estimation is a well-established method to identify the power output (PO) associated with the maximal metabolic steady state (MMSS) of exercise. CP estimation requires multiple time to task failure (TTF) trials and the precision of this evaluation in untrained individuals could be questionable due to their inexperience with performing highly demanding efforts to volitional exhaustion. Thus, the goal of this study was to compare whether the accuracy of CP to approximate the MMSS was affected by the training status of the individuals. Participants underwent: i) a ramp incremental test to task failure to determine maximal oxygen consumption (V̇ O2max) and peak PO (POpeak); ii) a series of 4-5 TTF trials at average POs ranging from 70 to 90% of POpeak performed on separate days, to obtain TTF durations of ~3-15 min for CP estimations; iii) 2-3 30-min constant PO rides to establish MMSS. The PO associated to CP was significantly greater than that associated to MMSS in both untrained (155±39 W vs. 147±34 W, respectively) and trained (233±37 W vs. 225±39 W, respectively) individuals (F = 13.2, p = 0.001, η2 = 0.375, effect size d = 0.14). Despite this, no significant differences in the PO at CP and the PO at MMSS were observed between the untrained and trained groups (bias = 7.5 W for both groups; F = 0.01, p = 0.99, η2 = 0.001; statistical power = 99%) and for both groups, the biases were significantly greater than 0 (untrained z = 2.57; trained z = 2.95). The 95% CI for the LOA were -13 to 28 W, and -11 to 26 W for untrained and trained, respectively. These findings indicate that, despite a significant (albeit small) difference between CP and MMSS, the CP model provided a close approximation of the PO associated with the MMSS in both untrained and trained participants. This indicates that the quality of the CP model was not affected by training status, which suggests that previous experience with highly demanding exercise is not a key component of the quality of the prediction.
On the unusual gas composition in the Beta Pictoris debris disk
Creators: name: Xie, Ji-Wei
name: Brandeker, Alexis
name: Wu, Yanqin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The metallic gas associated with the Beta Pic debris disk is not believed to be primordial, but arises from the destruction of dust grains. Recent observations have shown that carbon and oxygen in this gas are exceptionally overabundant compared to other elements, by some 400 times. We study the origin of this enrichment under two opposing hypothesis, preferential production, where the gas is produced with the observed unusual abundance (as may happen if gas is produced by photo-desorption from C/O-rich icy grains), and preferential depletion, where the gas evolves to the observed state from an original solar abundance (if outgassing occurs under high-speed collisions) under a number of dynamical processes. We include ... ... We find ... ...
description: accepted to ApJ, revised text is highlighted in red color, the old figure 2 is removed, other figures are revised
title: A real-time assessment of the relationship between neuronal activation and hemodynamic changes in humans
Creators: name: Burma, Joel Stephen
Publisher: name: Arts
Year: 2024
Subjects: subject: Neuroscience
subject: Cerebrovascular Physiology
subject: Engineering--Biomedical

description: This dissertation aimed to develop and employ a novel multimodal neuroimaging approach utilizing electroencephalography (EEG), functional near-infrared spectroscopy (fNIRS), transcranial Doppler ultrasound (TCD), finger photoplethysmography, electrocardiography, and capnography to study neurological, cerebrovascular, and cardiorespiratory responses during motor and visual tasks. The dissertation adopted a step-by-step approach for method development. Initially, a thorough systematic review of previous multimodal neuroimaging studies investigating neurovascular coupling/functional hyperemia was conducted to identify common limitations and equipment combinations (Chapter 2). This review informed the development of a novel concurrent integration of EEG-fNIRS-TCD neuromonitoring techniques with systemic physiological monitoring, detailed in Chapter 3. Following this, a pilot study involving 15 participants was conducted to assess the data quality from the three imaging modalities during resting motor (finger tapping) and visual (“Where’s Waldo/Wally?”) tasks (Chapter 4). These tasks were then performed during transient blood pressure oscillations induced by squat-stand maneuvers at 0.05 and 0.10 Hz to challenge the cerebrovasculature (Chapter 5), demonstrating that the neurovascular coupling task remained stable despite significant blood pressure fluctuations. Overall, the findings from this dissertation underscore the robustness of the EEG-fNIRS-TCD approach in capturing neuronal and cerebral hemodynamic responses across various tasks and hemodynamic challenges, providing better insight into cerebrovascular regulation.
Millimeter imaging of submillimeter galaxies in the COSMOS field: Redshift distribution
Creators: name: Smolcic, V.
name: Aravena, M.
name: Navarrete, F.
name: Schinnerer, E.
name: Riechers, D. A.
name: Bertoldi, F.
name: Feruglio, C.
name: Finoguenov, A.
name: Salvato, M.
name: Sargent, M.
name: McCracken, H. J.
name: Albrecht, M.
name: Karim, A.
name: Capak, P.
name: Carilli, C. L.
name: Cappelluti, N.
name: Elvis, M.
name: Ilbert, O.
name: Kartaltepe, J.
name: Lilly, S.
name: Sanders, D.
name: Sheth, K.
name: Scoville, N. Z.
name: Taniguchi, Y.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present new IRAM PdBI 1.3mm continuum observations at ~1.5" resolution of 28 SMGs previously discovered with the 870um bolometer LABOCA at APEX within the central 0.7deg2 of the COSMOS field. 19 out of the 28 LABOCA sources were detected with the PdBI at a >~3sigma level of ~1.4mJy/b. A combined analysis of this new sample with existing interferometrically identified SMGs in the COSMOS field yields the following results: 1) >~15%, and possibly up to ~40% of single-dish detected SMGs consist of multiple sources, 2) statistical identifications of multi-wavelength counterparts to the single-dish SMGs yield that only ~50% of these single-dish SMGs have real radio or IR counterparts, 3) ~18% of interferometric SMGs have only radio or even no multi-wavelength counterpart at all, and 4) ~50-70% of z>~3 SMGs have no radio counterparts down to an rms of 7-12uJy at 1.4GHz. Using the exact interferometric positions to identify proper multi-wavelength counterparts allows us to determine accurate photometric redshifts for these sources. The redshift distributions of the combined and the individual 1.1mm and 870um selected samples have a higher mean and broader width than the redshift distributions derived in previous studies. Our sample supports the previous tentative trend that on average brighter and/or mm-selected SMGs are located at higher redshifts. There is a tentative offset between the mean redshift for the 1.1mm (=3.1+/-0.4) and 870um (=2.6+/-0.4) selected samples, with the 1.1mm sources lying on average at higher redshifts. Based on our nearly complete sample of AzTEC 1.1mm SMGs within a uniform 0.15deg2 area we infer a higher surface density of z>~4 SMGs than predicted by current cosmological models. In summary, our findings imply that (sub-)millimeter interferometric identifications are crucial to build statistically complete and unbiased samples of SMGs.
description: 35 pages, 18 figures, 10 tables; accepted for publication in A&A
Non-perturbative renormalisation group for the Kardar-Parisi-Zhang equation: general framework and first applications
Creators: name: Canet, Léonie
name: Chaté, Hugues
name: Delamotte, Bertrand
name: Wschebor, Nicolás
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an analytical method, rooted in the non-perturbative renormalization group, that allows one to calculate the critical exponents and the correlation and response functions of the Kardar-Parisi-Zhang (KPZ) growth equation in all its different regimes, including the strong-coupling one. We analyze the symmetries of the KPZ problem and derive an approximation scheme that satisfies the linearly realized ones. We implement this scheme at the minimal order in the response field, and show that it yields a complete, qualitatively correct phase diagram in all dimensions, with reasonable values for the critical exponents in physical dimensions. We also compute in one dimension the full (momentum and frequency dependent) correlation function, and the associated universal scaling functions. We find an excellent quantitative agreement with the exact results from Praehofer and Spohn (J. Stat. Phys. 115 (2004)). We emphasize that all these results, which can be systematically improved, are obtained with sole input the bare action and its symmetries, without further assumptions on the existence of scaling or on the form of the scaling function.
description: 21 pages, 6 figures, revised version, including the correction of an inconsistency and accordingly updated figures 5 and 6 and table 2, as published in an Erratum (see Ref. below). The results are improved
Structural basis for heme degradation in Staphylococcus aureus
Creators: name: Ukpabi, Georgia Nonye
Publisher: name: University of British Columbia
Year: 2012

description: IsdG and IsdI are heme degrading enzymes from the bacterium Staphylococcus aureus. Heme degrading enzymes use heme as a substrate and cofactor to degrade the porphyrin ring and release the central iron atom. Previous work on the structure of these enzymes showed metal coordination by a conserved His residue in the heme complex of the inactive IsdG-N7A variant and in the cobalt protoporphyrin IX complex of IsdI. In these structures, the porphyrin ring is highly distorted from planarity resulting in the β- and δ-meso carbons being displaced toward the distal side of the heme pocket and the α- and γ-meso carbons towards the His proximal side. This heme distortion is described as ruffling and is not present in the classical family of heme degrading enzymes called the heme oxygenases (HO) that bind heme in a planar manner. Thus, heme ruffling is proposed to be an important structural feature for the reaction mechanism of IsdG and IsdI. The role of heme ruffling in IsdI activity was examined in this study. For the first time, IsdI was cocrystallized in complex with its true substrate, heme, and the structure was solved to 1.50 Å resolution. The structure revealed extensive heme ruffling of 2.1 Å as determined by normal-coordinate analysis. IsdI was then engineered to adopt a flatter heme by mutating a conserved tryptophan residue, W66, in the heme pocket to the less bulky side chains of tyrosine, phenylalanine, leucine and alanine. Of the IsdI variants tested, only W66Y was amenable to X-ray structure solution. Heme ruffling in the variant was lessened to about 1.4 Å, demonstrating that W66 is an important contributor to heme distortion in IsdI. The activity of the W66Y variant was reduced to half that of wild-type suggesting a link between heme distortion and enzyme activity in IsdI.
Introduction to data management plans - University of Bergen Library Presentation 2023-12-01
Creators: name: Daniel Henry Øvrebø
Publisher: name: Zenodo
Year: 2023
Subjects: Library
Data Management Plan
Research Data Management
Research Data Lifecycle
FAIR Data
FAIR
Open Data
Open Science

description: Presentation slides for webinar "Data Management Plan (DMP)" by the University of Bergen Library, 25.11.2022.

The presentation introduces Data Management Plans as tool to ensure good data handling practice in a research project and as required by research funders such as the Research Council of Norway or the Horizon Europe funding scheme. It gives an introduction to writing a data management plan for a research project in accordance with the Science Europe Practical Guide to the International Alignment of Research Data Management and specifically points out resources at the University of Bergen, Norway.
Relative and center-of-mass motion in the attractive Bose-Hubbard model
Creators: name: Sørensen, Ole Søe
name: Gammelmark, Søren
name: Mølmer, Klaus
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We present first-principle numerical calculations for few particle solutions of the attractive Bose-Hubbard model with periodic boundary conditions. We show that the low-energy many-body states found by numerical diagonalization can be written as translational superposition states of compact composite systems of particles. These compact states break the translational symmetry of the problem and their center-of-mass and internal excitations offer simple explanations of the energy spectrum of the full model.
description: 12 pages, 9 figures
title: An experimental test of bull trout egg to alevin survival in the wild, with implications for conservation translocations in Alberta
Creators: name: Lepine, Tara Marie
Publisher: name: Graduate Studies
Year: 2024
Subjects: subject: Bull trout
subject: translocation
subject: conservation
subject: Alberta
subject: egg survival
subject: Education--Sciences
subject: Fisheries and Aquaculture
subject: Ecology
subject: FOS: Biological sciences

description: Conservation translocations are becoming more common for species recovery in the wild. There is growing interest in their use to supplement or restore bull trout (Salvelinus confluentus) populations in environments where they were once known to have had self-sustaining populations. This project tested the feasibility of translocating fertilized eggs via instream incubation capsules in Smith-Dorrien Creek (Kananaskis, Alberta). This site was chosen because it is known for having an abundance of redd sites and spawning bull trout. The research objectives were to 1) assess if successful rearing of bull trout could be accomplished with incubation capsules and 2) quantify the relationship between bull trout survival and habitat parameters (e.g., temperature, groundwater, substrate) among sites where the incubation capsules were deployed. Field work began for this project in Spring 2023 when temperature loggers were installed at sites in Smith-Dorren Creek, followed by the installation of incubation capsules containing bull trout eggs at the sites in Fall 2023, which were collected in March 2024, along with measuring other environmental factors (e.g., groundwater discharge) for analysis. The results of this study indicate that there are high survival rates for this type of instream incubation approach/technique for bull trout eggs (71.4% ± 4.9% survival). The results also indicate a significant negative impact of number of days below 0°C on the survival of bull trout from egg to alevin. My experiment highlights the potential for this approach, with key recommendations for future attempts; specifically, avoiding freezing across the site.
A recollimation shock 80 mas from the core in the jet of the radio galaxy 3C120: Observational evidence and modeling
Creators: name: Agudo, Iván
name: Gómez, José L.
name: Casadio, Carolina
name: Cawthorne, Timothy V.
name: Roca-Sogorb, Mar
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present Very Long Baseline Array observations of the radio galaxy 3C120 at 5, 8, 12, and 15 GHz designed to study a peculiar stationary jet feature (hereafter C80) located ~80 mas from the core, which was previously shown to display a brightness temperature ~600 times lager than expected at such distances. The high sensitivity of the images -- obtained between December 2009 and June 2010 -- has revealed that C80 corresponds to the eastern flux density peak of an arc of emission (hereafter A80), downstream of which extends a large (~20 mas in size) bubble-like structure that resembles an inverted bow shock. The linearly polarized emission closely follows that of the total intensity in A80, with the electric vector position angle distributed nearly perpendicular to the arc-shaped structure. Despite the stationary nature of C80/A80, superluminal components with speeds up to ~3 c have been detected downstream from its position, resembling the behavior observed in the HST-1 emission complex in M87. The total and polarized emission of the C80/A80 structure, its lack of motion, and brightness temperature excess are best reproduced by a model based on synchrotron emission from a conical shock with cone opening angle η=10 degrees, jet viewing angle θ=16 degrees, a completely tangled upstream magnetic field, and upstream Lorentz factor γ=8.4. The good agreement between our observations and numerical modeling leads us to conclude that the peculiar feature associated with C80/A80 corresponds to a conical recollimation shock in the jet of 3C120 located at a de-projected distance of ~190 pc downstream from the nucleus.
description: Accepted for publication in ApJ
title: Autistic and Thriving: Self-Defined Thriving of Autistic Adults
Creators: name: Bicknell, Chelsea J.
Publisher: name: Werklund School of Education
Year: 2024
Subjects: subject: Autism
subject: Thrivng
subject: self-defined
subject: Autsitic Adults
subject: Positive Psychology
subject: Educational Psychology
subject: Qualitative Research
subject: Educational Psychology

description: Much research on the autism spectrum has focused on causal factors, genetics, effective processes of identification, and approaches to intervention. In contrast, much less has explored positive aspects and outcomes associated with autism, such as thriving; the little work on thriving in the autistic community has primarily used methods of parental and teacher report, limiting the voice of the individuals themselves and leaving a gap in knowledge about how those on the autism spectrum can thrive. As a result, little is known about positive outcomes for autistic individuals and how to promote them. This thesis explored how thriving presents and is defined by autistic adults. This study used the Delphi method to allow autistic individuals to express what thriving is for them. Further, it afforded a consensus on what self-defined thriving is to autistic adults, creating direction and foundational knowledge for future studies to elaborate upon. 19 participants completed a broad, open-ended, online questionnaire regarding what thriving means to them; six additional participants then worked collaboratively to sort and create common themes from the responses to the questionnaire. The findings are discussed in context to existing literature and highlighting new knowledge as well as discussion of research implications and suggestions for future explorations.
Peierls to superfluid crossover in the one-dimensional, quarter-filled Holstein model
Creators: name: Hohenadler, Martin
name: Assaad, Fakher F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use continuous-time quantum Monte Carlo simulations to study retardation effects in the metallic, quarter-filled Holstein model in one dimension. Based on results which include the one- and two-particle spectral functions as well as the optical conductivity, we conclude that with increasing phonon frequency the ground state evolves from one with dominant diagonal order---2k_F charge correlations---to one with dominant off-diagonal fluctuations, namely s-wave pairing correlations. In the parameter range of this crossover, our numerical results support the existence of a spin gap for all phonon frequencies. The crossover can hence be interpreted in terms of preformed pairs corresponding to bipolarons, which are essentially localised in the Peierls phase, and "condense" with increasing phonon frequency to generate dominant pairing correlations.
description: 11 pages, 5 figures
title: Zum Zusammenhang zwischen sprachlichen und mathematischen Leistungen in unterschiedlichen Inhaltsbereichen
Creators: name: Brunner, Esther
name: Bernet, Felix
name: Nänny, Stephan
Publisher: name: Publikationsserver der Pädagogischen Hochschule Thurgau
Year: 2022
Subjects: Sprachsensibler Mathematikunterricht
Mathematische Kompetenzen
Sprachliche Voraussetzungen

description: Der Zusammenhang zwischen sprachlicher und mathematischer Kompetenz wurde für Schülerinnen und Schüler des dritten Schuljahres im Hinblick auf zwei Sprachmasse und drei mathematische Inhaltsbereiche untersucht (N = 215). Dabei zeigen sich für beide Sprachmasse erhebliche Zusammenhänge mit den Leistungen bei mathemati-schen Textaufgaben, aber ebenso bei relativ spracharmen, ikonisch repräsentierten geometrischen Aufgaben. Deutlich wird, dass bekannte Zusammenhänge zwischen sprachlichen und mathematischen Leistungen im Hinblick auf die Aufgabengestaltung, aber auch bezüglich des mathematischen Inhaltsbereichs vertieft analysiert werden sollten, um ein entsprechendes Potenzial für eine sprachbewusste und fach- bzw. inhaltsfokussierte Lernbegleitung und Förderung entfalten zu können.
description: Schweizerische Zeitschrift für Bildungswissenschaften, vol. 44, no. 2, p. 167
Broadband Photometry of 105 Giant Arcs: Redshift Constraints and Implications for Giant Arc Statistics
Creators: name: Bayliss, Matthew B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We measure the photometric properties of 105 giant arcs that were identified in systematic searches for galaxy-cluster-scale strong lenses in the Second Red-Sequence Cluster Survey (RCS-2) and the Sloan Digital Sky Survey (SDSS). The cluster lenses span 0.2 < z_lens < 1.2 in redshift, with a median z_lens = 0.58. Using broadband color criteria we sort the entire arc sample into redshift bins based on u-g and g-r colors, and also r-z colors for the ~90% of arcs that have z-band data. This analysis yields broad redshift constraints with 71 +5 -4 % of the arcs at z > 1.0, 64 +6 -4 % at z > 1.4, 56 +5 -4 % at z > 1.9, and 21 +4 -2 % at z > 2.7. The remaining 29 +3 -5 % have z < 1. The inferred median redshift is z_s = 2.0 +/- 0.1, in good agreement with a previous determination from a smaller sample of brighter arcs (g < 22.5). This agreement confirms that z_s = 2.0 +/- 0.1 is the typical redshift for giant arcs with g < 24 that are produced by cluster-scale strong lenses, and that there is no evidence for strong evolution in the redshift distribution of arcs over a wide range of g-band magnitudes (20 < g < 24). Establishing that half of all giant arcs are at z > 2 contributes significantly toward relieving the tension between the number of arcs observed and the number expected in a Lambda-CDM cosmology, but there is considerable evidence to suggest that a discrepancy persists. Additionally, this work confirms that forthcoming large samples of giant arcs will supply the observational community with many magnified galaxies at z > 2.
description: 16 pages, 8 figures, 3 tables, Accepted to ApJ; University of Chicago Department of Astronomy & Astrophysics PhD Thesis
The zero-dimensional O(N) vector model as a benchmark for perturbation theory, the large-N expansion and the functional renormalization group
Creators: name: Keitel, Jan
name: Bartosch, Lorenz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the zero-dimensional O(N) vector model as a simple example to calculate n-point correlation functions using perturbation theory, the large-N expansion, and the functional renormalization group (FRG). Comparing our findings with exact results, we show that perturbation theory breaks down for moderate interactions for all N, as one should expect. While the interaction-induced shift of the free energy and the self-energy are well described by the large-N expansion even for small N, this is not the case for higher-order correlation functions. However, using the FRG in its one-particle irreducible formalism, we see that very few running couplings suffice to get accurate results for arbitrary N in the strong coupling regime, outperforming the large-N expansion for small N. We further remark on how the derivative expansion, a well-known approximation strategy for the FRG, reduces to an exact method for the zero-dimensional O(N) vector model.
description: 13 pages, 13 figures
Designing optimal discrete-feedback thermodynamic engines
Creators: name: Horowitz, Jordan M.
name: Parrondo, Juan M. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Feedback can be utilized to convert information into useful work, making it an effective tool for increasing the performance of thermodynamic engines. Using feedback reversibility as a guiding principle, we devise a method for designing optimal feedback protocols for thermodynamic engines that extract all the information gained during feedback as work. Our method is based on the observation that in a feedback-reversible process the measurement and the time-reversal of the ensuing protocol both prepare the system in the same probabilistic state. We illustrate the utility of our method with two examples of the multi-particle Szilard engine.
description: 15 pages, 5 figures, submitted to New J. Phys
Introduction to data management plans - University of Bergen Library Presentation 25/11/2022
Creators: name: Øvrebø, Daniel Henry
Publisher: name: Zenodo
Year: 2022
Subjects: Library
Data Management Plan
Research Data Management
Research Data Lifecycle
FAIR Data
FAIR
Open Data
Open Science

description: Presentation slides for webinar "Data Management Plan (DMP)" by the University of Bergen Library, 25.11.2022. The presentation introduces Data Management Plans as tool to ensure good data handling practice in a research project and as required by research funders such as the Research Council of Norway or the Horizon Europe funding scheme. It gives an introduction to writing a data management plan for a research project in accordance with the Science Europe Practical Guide to the International Alignment of Research Data Management and specifically points out resources at the University of Bergen, Norway.
title: Co-creation of Visual Stories as a Transdisciplinary Approach
Creators: name: Dadkhahfard, Shima
Publisher: name: Graduate Studies
Year: 2024
Subjects: subject: Co-creation of Visual Stories
subject: Art-based Methods
subject: Visual Arts
subject: Mediation
subject: Agency
subject: Mathematics
subject: FOS: Mathematics
subject: Visual Story
subject: Education--Art
subject: Education
subject: Education--Sciences
subject: Education--Social Sciences
subject: Design and Decorative Arts

description: Through the co-creation of visual stories, this study explored the racialized and gendered bodily experiences of Afghan refugee/forced migrant families in relation to agency within the school context, particularly mathematics classroom. Using arts-based research, I facilitated workshops to evoke conversations around racialized and gendered bodily experiences of Afghan refugee/forced migrant families in the school context. An illustrated story book was used as a mediational tool to underscore the affordances of visuals in the workshops. The data sources included drawings, video recordings of the workshops, and visual field notes taken during the workshops. I conducted a visual discourse analysis of the drawings to examine how visual elements utilized in the illustrated story book helped participants to share their own bodily experiences. Mediational tools are artifacts that can mediate various actions of individuals and can shape both individual and social processes (Esmonde & Booker, 2016; Wertsch, 1998). The visual analysis of the drawings revealed that participants visually expressed their bodily experiences to depict their power and agency (Holland et al., 2001) in the school context. Participants and I illustrated findings from this study in the form of digital illustration. The story of Gol Noor was collaboratively created by the participants and me. It was co-created based on the visual analysis of the participants’ drawings, the narratives shared by participants, my own interpretations as an artist/researcher, and feedback from participants in an iterative cycle. The findings highlighted that (1) participants repurposed the artistic tools and visual elements utilized in the illustrated story book to visually communicate their embodied stories, and (2) participants communicated their experiences through representation of their bodies in relation to their agency in school, particularly focusing on aspects related to their gender and race.
KCTCS Enhancing Programs for IT Certification (EPIC)
Creators: name: Hughes, Katherine Lee
name: Belfield, Clive
name: Ran, Xiaotao
name: Jenkins, Paul Davis
Publisher: name: Columbia University
Year: 2018
Subjects: Community colleges
Information technology--Study and teaching
Computer-assisted instruction
Education, Higher
Academic achievement

description: As technology and the labor market continue to evolve, community colleges face the crucial challenge of preparing students for contemporary high-skill, high-wage jobs. In an effort to spur the development of new programs that effectively train students for today’s dynamic workforce, the U.S. Department of Labor gave a consortium of six Kentucky community colleges a four-year, $10 million grant in October 2014. The grant money supported Enhancing Programs for IT Certification (EPIC), an online, competency-based curriculum that expands access to computer and medical information technology credentialing programs.

This report describes researchers’ qualitative analysis of EPIC and evaluates the program’s implementation and outcomes. The authors found that the program was implemented mostly as planned; by the end of the grant period, it had produced more courses and credentials than initially proposed.

The report also recounts challenges researchers faced in evaluating the impact of EPIC on students, due in part to the small sample of students who took at least two program courses and the short time span of this work. Regarding course grades, the authors found that while EPIC students did not underperform in comparison to their peers, they were unable to draw any strong conclusions from their analyses. The report concludes with suggestions for the field of online competency-based education and posits questions for future research.
Tunneling between single and multi-centered black hole configurations
Creators: name: Chung, Hyeyoun
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We find a gravitational instanton that connects an initial state corresponding to a single-centered extremal Reissner-Nordstrom (ERN) black hole configuration, to a final state corresponding to a multi-centered configuration. This instanton is interpreted as describing quantum tunneling between the two different black hole solutions. We evaluate the Euclidean action for this instanton and find that the amplitude for the tunneling process is equal to half the difference in entropy between the initial and final configurations.
description: 8 pages, 4 figures. v4: final version accepted for publication in Phys. Rev. D
title: Advancing Tailings Dam Performance Monitoring with Distributed Acoustic Sensing
Creators: name: Ouellet, Susanne
Publisher: name: Science
Year: 2024
Subjects: subject: distributed acoustic sensing
subject: tailings dams
subject: geotechnical engineering
subject: coda wave interferometry
subject: passive seismic interferometry
subject: distributed fiber optic sensing
subject: environmental seismology
subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Engineering--Mining
subject: Engineering--Civil

description: Tailings dams require careful design, planning and monitoring throughout their life cycle to prevent a potential failure. Such failures can occur due to a variety of causes, such as overtopping, structural and foundation conditions, static or seismic liquefaction, and erosional processes. As such, a tailings dam monitoring system should be capable of identifying potential behaviours leading up to different failure modes and with adequate warning time. This thesis investigates an emerging fiber optic sensing technology, distributed acoustic sensing (DAS), with a passive geophysical technique (coda wave interferometry; CWI), to advance monitoring of tailings dam performance. The first study provides a proof-of-concept of CWI using geophones at an active tailings dam, from June to July 2020. Following this study, a fiber optic cable located near the geophones was then employed with DAS and CWI from April to August 2021. CWI was used to infer changes in shear wave velocities up to ~1.9% over depths ranging from ~6 to ~16 m. An inverse correlation between the dv/v and tailings pond levels in the summer months aligned with the earlier geophone study. This study demonstrated how DAS can augment traditional geotechnical monitoring by providing higher spatial resolution of dv/v as a proxy for dam performance. While higher frequency (> 1Hz) DAS measurements can be used with CWI, lower frequency (<1 Hz) DAS measurements can provide complementary information on changes in strain near the cable. A three-day low-frequency DAS dataset encompassing a rainfall event was acquired from the Hollin Hill slow-moving landslide observatory. A conceptual framework was developed to interpret the onset of movement, retrogression, and a flow lobe surge with nanostrain-rate sensitivity, providing new insights into the kinematics of a slow-moving landslide. Collocated slope inclinometer data correlated with the inferred DAS displacements. This study demonstrates how lower frequency DAS can also provide valuable information for tailings dam monitoring applications, using slope inclinometer data (commonly installed for tailings dam monitoring) to evaluate DAS performance. Together, these findings demonstrate how DAS can be used to advance monitoring of tailings dam performance to reduce the risk of future dam failures.
Crossing point phenomena (T* = 2.7 K) in specific heat curves of superconducting ferromagnets RuSr2Gd1.4Ce0.6Cu2O10-δ
Creators: name: Kumar, Anuj
name: Tandon, R. P.
name: Wang, Jianli
name: Zeng, Rong
name: Awana, V. P. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Crossing point phenomena are one of the interesting and still puzzling effects in strongly correlated electron systems. We have synthesized RuSr2Gd1.4Ce0.6Cu2O10-δ (GdRu-1222) magneto-superconductor through standard solid state reaction route and measured its magnetic, transport and thermal properties. We also synthesized RuSr2Eu1.4Ce0.6Cu2O10-δ (EuRu-1222) then measured its heat capacity in zero magnetic fields for reference. The studied compounds crystallized in tetragonal structure with space group I4/mmm. GdRu-1222 is a reported magneto-superconductor with Ru spins magnetic ordering at temperature around 110 K and superconductivity in Cu-O2 planes below around 40 K. To explore the crossing point phenomena, the specific heat [Cp (T)] was investigated in temperature range 1.9-250 K, under magnetic field of up to 70 kOe. Unfortunately though no magnetic and superconducting transitions are observed in specific heat, a Schottky type anomaly is observed at low temperatures below 20 K. This low temperature Schottky type anomaly can be attributed to splitting of the ground state spectroscopic term 8S7/2 of paramagnetic Gd3+ ions by both internal and external magnetic fields. It was also observed that Cp (T) being measured for different values of magnetic field, possesses the same crossing point (T* = 2.7 K), up to the applied magnetic field 70 kOe. A quantitative explanation of this phenomenon, based on its shape and temperature dependence of the associated generalized heat capacity (Cp), is presented. This effect supports the crossing point phenomena, which is supposed to be inherent for strongly correlated systems.
description: 12 pages Text+Figs (awana@mail.nplindia.ernet.in)