cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Vasopressin cells in the rodent olfactory bulb resemble non-bursting superficial tufted cells and are primarily inhibited upon olfactory nerve stimulation
Creators: name: Lukas, Michael
name: Suyama, Hajime
name: Egger, Veronica
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: calcium imaging, electrophysiology, olfactory bulb, social, tufted cells, Vasopressin
subject: 570 Biowissenschaften, Biologie

description: The intrinsic vasopressin system of the olfactory bulb is involved in social odor processing and consists of glutamatergic vasopressin cells (VPCs) located at the medial border of the glomerular layer. To characterize VPCs in detail, we combined various electrophysiological, neuroanatomical and two-photon Ca2+ imaging techniques in acute bulb slices from juvenile transgenic rats with eGFP-labelled VPCs. VPCs showed regular non-bursting firing patterns, and displayed slower membrane time constants and higher input resistances versus other glutamatergic tufted cell types. VPC axons spread deeply into the external plexiform and superficial granule cell layer. Axonal projections fell into two subclasses, with either denser local columnar collaterals or longer-ranging single projections running laterally within the internal plexiform layer and deeper within the granule cell layer. VPCs always featured lateral dendrites and a tortuous apical dendrite that innervated a single glomerulus with a homogenously branching tuft. These tufts lacked Ca2+ transients in response to single somatically-evoked action potentials and showed a moderate Ca2+ increase upon prolonged action potential trains. Notably, electrical olfactory nerve stimulation did not result in synaptic excitation of VPCs, but triggered substantial GABAA receptor-mediated IPSPs that masked excitatory barrages with yet longer latency. Exogenous vasopressin application reduced those IPSPs, as well as olfactory-nerve evoked EPSPs recorded from external tufted cells. In summary, VPCs can be classified as non-bursting, vertical superficial tufted cells. Moreover, our findings imply that sensory input alone cannot trigger excitation of VPCs, arguing for specific additional pathways for excitation or disinhibition in social contexts. Significance statement Efficient sensing of conspecific odor signatures is essential for most rodent social behavior. Although olfactory bulb vasopressin was shown to be a potent facilitator of social odor processing, little is known on the cellular substrate of the intrinsic vasopressin system. Here we provide a detailed characterization of the anatomical and electrophysiological properties of the bulbar vasopressin cells. While we also identify several targets of vasopressin action, we find that stimulation of the sensory inputs to the bulb results primarily in vasopressin cell inhibition, implying that excitation of the bulbar vasopressin system requires additional still unknown excitatory or dis-inhibitory inputs which might confer social specificity. These insights may complement the knowledge on vasopressinergic modulation of social stimuli in limbic brain structures.
Black Hole Mass of the Ultraluminous X-ray source M82 X-1
Creators: name: Dewangan, Gulab C.
name: Titarchuk, Lev
name: Griffiths, Richard E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the first clear evidence for the simultaneous presence of a low frequency break and a QPO in the fluctuation power spectrum of a well known ultraluminous X-ray source (ULX) in M82 using long XMM-Newton observations. The break occurs at a frequency of 34.2_{-3}^{+6}mHz. The QPO has a centroid at 114.3\pm1.5mHz, a coherence Q~3.5 and an amplitude (rms) of 19% in the 2-10keV band. The power spectrum is approximately flat below the break frequency and then falls off above the break frequency as a power law with the QPO superimposed. This form of the power spectrum is characteristic of the Galactic X-ray binaries (XRBs) in their high or intermediate states. M82 X-1 was likely in an intermediate state during the observation. The EPIC PN spectrum is well described by a model comprising an absorbed power-law (Gamma~2) and an iron line at ~6.6keV with a width sigma~0.2keV and an equivalent width of ~180eV. Using the well established correlations between the power and energy spectral parameters for XRBs, we estimate a black hole mass for M82 X-1 in the range of 25-520Msun including systematic errors that arise due to the uncertainty in the calibration of the photon spectral index versus QPO frequency relation.
description: Final version, accepted for publication in ApJ Letters
The in-plane anisotropy of the hole $g$ factor in CdTe/(Cd,Mg)Te quantum wells studied by spin-dependent photon echoes
Creators: name: Poltavtsev, S. V.
name: Yugova, I. A.
name: Kosarev, A. N.
name: Yakovlev, D. R.
name: Karczewski, G.
name: Chusnutdinow, S.
name: Wojtowicz, T.
name: Akimov, I. A.
name: Bayer, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use the two-pulse spin-dependent photon echo technique to study the in-plane hole spin anisotropy in a 20~nm-thick CdTe/Cd$_{0.76}$Mg$_{0.24}$Te single quantum well by exciting the donor-bound exciton resonance. We take advantage of the photon echo sensitivity to the relative phase of the electron and hole spin precession and study various interactions contributing to the hole in-plane spin properties. The main contribution is found to arise from the crystal cubic symmetry described by the Luttinger parameter $q=0.095$, which is substantially larger than the one theoretically expected for CdTe or found in other quantum well structures. Another contribution is induced by the strain within the quantum well. These two contributions manifest as different harmonics of the spin precession frequencies in the photon echo experiment, when strength and orientation of the Voigt magnetic field are varied. The magnitude of the effective in-plane hole $g$ factor is found to vary in the range $|\tilde{g_h}|$=0.125--0.160 in the well plane.
description: 7 figures
Conformational proofreading of distant 40S ribosomal subunit maturation events by a long-range communication mechanism
Creators: name: Mitterer, Valentin
name: Shayan, Ramtin
name: Ferreira-Cerca, Sébastien
name: Murat, Guillaume
name: Enne, Tanja
name: Rinaldi, Dana
name: Weigl, Sarah
name: Omanic, Hajrija
name: Gleizes, Pierre-Emmanuel
name: Kressler, Dieter
name: Plisson-Chastang, Celia
name: Pertschy, Brigitte
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: 570 Biowissenschaften, Biologie

description: Eukaryotic ribosomes are synthesized in a hierarchical process driven by a plethora of assembly factors, but how maturation events at physically distant sites on pre-ribosomes are coordinated is poorly understood. Using functional analyses and cryo-EM, we show that ribosomal protein Rps20 orchestrates communication between two multi-step maturation events across the pre-40S subunit. Our study reveals that during pre-40S maturation, formation of essential contacts between Rps20 and Rps3 permits assembly factor Ltv1 to recruit the Hrr25 kinase, thereby promoting Ltv1 phosphorylation. In parallel, a deeply buried Rps20 loop reaches to the opposite pre-40S side, where it stimulates Rio2 ATPase activity. Both cascades converge to the final maturation steps releasing Rio2 and phosphorylated Ltv1. We propose that conformational proofreading exerted via Rps20 constitutes a checkpoint permitting assembly factor release and progression of pre-40S maturation only after completion of all earlier maturation steps.
UBC Carpool Strategy: Recommended Incentive / Discount Program
Creators: name: Ao, Kat
name: Hoffman, Vivian
name: Jolly, Carole
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
The long reach of DNA sequence heterogeneity in diffusive processes
Creators: name: Slutsky, Michael
name: Kardar, Mehran
name: Mirny, Leonid A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Biomolecules (q-bio.BM)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Many biological processes involve one dimensional diffusion over a correlated inhomogeneous energy landscape with a correlation length $ξ_c$. Typical examples are specific protein target location on DNA, nucleosome repositioning, or DNA translocation through a nanopore, in all cases with $ξ_c\approx$ 10 nm. We investigate such transport processes by the mean first passage time (MFPT) formalism, and find diffusion times which exhibit strong sample to sample fluctuations. For a a displacement $N$, the average MFPT is diffusive, while its standard deviation over the ensemble of energy profiles scales as $N^{3/2}$ with a large prefactor. Fluctuations are thus dominant for displacements smaller than a characteristic $N_c \gg ξ_c$: typical values are much less than the mean, and governed by an anomalous diffusion rule. Potential biological consequences of such random walks, composed of rapid scans in the vicinity of favorable energy valleys and occasional jumps to further valleys, is discussed.
Trapping of cosmic rays in MHD turbulence
Creators: name: Xu, Siyao
name: Lazarian, Alex
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Astrophysical plasmas are turbulent and magnetized. The interaction between cosmic rays (CRs) and magnetohydrodynamic (MHD) turbulence is a fundamental astrophysical process. Based on the current understanding of MHD turbulence, we revisit the trapping of CRs by magnetic mirrors in the context of MHD turbulence. In compressible MHD turbulence, isotropic fast modes dominate both trapping and gyroresonant scattering of CRs. The presence of trapping significantly suppresses the pitch-angle scattering and the spatial diffusion of CRs along the magnetic field. The resulting parallel diffusion coefficient has a weaker dependence on CR energy at higher energies. In incompressible MHD turbulence, the trapping by pseudo-Alfvén modes dominates over the gyroresonant scattering by anisotropic Alfvén and pseudo-Alfvén modes at all pitch angles and prevents CRs from diffusion.
description: 8 pages, 8 figures, accepted for publication in ApJ
Piper, Sophocleous et al. Supplemental Figures & Legends.pdf
Creators: name: Ann-Katrin Piper
name: Sophocleous, Reece
name: Ross, Samuel
name: Evesson, Frances
name: Saleh, Omar
name: Bournazos, Adam
name: Yasa, Joe
name: Reed, Claudia
name: Woolger, Natalie
name: Sluyter, Ronald
name: Greer, Peter
name: Biro, Mate
name: Lemckert, Frances
name: Cooper, Sandra
Publisher: name: figshare
Year: 2020
Subjects: Cell Biology

description: supplemental data to support manuscript
Cyclotron resonance harmonics in the ac response of a 2D electron gas with smooth disorder
Creators: name: Dmitriev, I. A.
name: Mirlin, A. D.
name: Polyakov, D. G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The frequency-dependent conductivity $σ_{xx}(ω)$ of 2D electrons subjected to a transverse magnetic field and smooth disorder is calculated. The interplay of Landau quantization and disorder scattering gives rise to an oscillatory structure that survives in the high-temperature limit. The relation to recent experiments on photoconductivity by Zudov {\it et al.} and Mani {\it et al.} is discussed.
description: 4 pages, 2 figures; final version to appear in PRL
Identification of Chimera using Machine Learning
Creators: name: GHOSH, SAPTARSHI
Publisher: name: figshare
Year: 2020
Subjects: subject: 29902 Complex Physical Systems
subject: FOS: Physical sciences

description: The Disputed states.
Abstract: The identification of chimera which refers to a state of coexisting incoherence and coherence, in various complex dynamical systems is a challenging but essential task, given its new-found applicability in various areas, including neuroscience. Due to its widely varied appearance in different systems and the peculiar nature of its profile, a simple yet universal method for its identification remains an open problem. Here, we present a very distinctive approach to address this by using machine learning techniques, namely random forest, oblique random forests via multi-surface proximal support vector machines with tikhonov regularization, axis-parallel split regularization and null Space regularization and sparse pre-trained / auto-encoder based random vector functional link neural network, to characterize different dynamics and identify the chimera state. We demonstrate high accuracy in identifying the coherent, incoherent and chimera states from given spatial profiles of different underlying models. We validate this approach for different time-continuous and time discrete coupled dynamics on networks. This work provides a direction for employing machine learning techniques to identify dynamical patterns arising due to the interaction among non-linear units on large-scale, and for characterizing complex spatio-temporal phenomena in real-world systems for various applications.
N to Delta electromagnetic transition form factors from Lattice QCD
Creators: name: Alexandrou, C.
name: de Forcrand, Ph.
name: Lippert, Th.
name: Neff, H.
name: Negele, J. W.
name: Schilling, K.
name: Schroers, W.
name: Tsapalis, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The magnetic dipole, the electric quadrupole and the Coulomb quadrupole amplitudes for the transition $γN\to Δ$ are evaluated both in quenched lattice QCD at $β=6.0$ and using two dynamical Wilson fermions simulated at $β=5.6$. The dipole transition form factor is accurately determined at several values of momentum transfer. On the lattices studied in this work, the electric quadrupole amplitude is found to be non-zero yielding a negative value for the ratio, $ R_{EM}$, of electric quadrupole to magnetic dipole amplitudes at three values of momentum transfer.
description: Discussion of systematic errors and chiral extrapolation extended; Typos corrected; Version to appear in Phys. Rev. D.; 19 pages including 21 figures
Supernova feedback and the energy deposition in molecular clouds
Creators: name: Lucas, William E.
name: Bonnell, Ian A.
name: Dale, James E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Feedback from supernovae is often invoked as an important process in limiting star formation, removing gas from galaxies and hence as a determining process in galaxy formation. Here we report on numerical simulations investigating the interaction between supernova explosions and the natal molecular cloud. We also consider the cases with and without previous feedback from the high-mass star in the form of ionising radiation and stellar winds. The supernova is able to find weak points in the cloud and create channels through which it can escape, leaving much of the well shielded cloud largely unaffected. This effect is increased when the channels are pre-existing due to the effects of previous stellar feedback. The expanding supernova deposits its energy in the gas that is in these exposed channels, and hence sweeps up less mass when feedback has already occurred, resulting in faster outflows with less radiative losses. The full impact of the supernova explosion is then able to impact the larger scale of the galaxy in which it abides. We conclude that supernova explosions only have moderate effects on their dense natal environments but that with pre-existing feedback, the energetic effects of the supernova are able to escape and affect the wider scale medium of the galaxy.
description: 12 pages, 10 figures, MNRAS in press
Deep electroproduction of exotic hybrid mesons
Creators: name: Anikin, I. V.
name: Pire, B.
name: Szymanowski, L.
name: Teryaev, O. V.
name: Wallon, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We evaluate the leading order amplitude for the deep exclusive electroproduction of an exotic hybrid meson in the Bjorken regime. We show that, contrary to naive expectation, this amplitude factorizes at the twist 2 level and thus scales like usual meson electroproduction when the virtual photon and the hybrid meson are longitidinally polarized. Exotic hybrid mesons may thus be studied in electroproduction experiments at JLAB, HERA (HERMES) or CERN (COMPASS).
description: 4 pages LATEX, added some comments and refs.,version to appear in Phys. Rev. D
Deliverable D-JRP-TOXOSOURCES-WP3.1 Report on available analytical procedures for detection of Toxoplasma gondii in fresh produce and list of promising analytical procedures
Creators: name: Lalle, Marco
name: Slana, Iva
name: Bier, Nadja
name: Mayer-Scholl, Anne
name: Jokelainen, Pikka
Publisher: name: Zenodo
Year: 2020
Subjects: Toxoplasma gondii
TOXOSOURCES

description: Deliverable D-JRP-TOXOSOURCES-WP3.1
 Report on available analytical procedures for detection of Toxoplasma gondii in fresh produce and list of promising analytical procedures
A Note on Knot Invariants and q-Deformed 2d Yang-Mills
Creators: name: de Haro, Sebastian
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We compute expectation values of Wilson loops in q-deformed 2d Yang-Mills on a Riemann surface and show that they give invariants of knots in 3-manifolds which are circle bundles over the Riemann surface. The areas of the loops play an essential role in encoding topological information about the extra dimension, and they are quantized to integer or half integer values.
description: 12 pages, 1 figure. v2: added references, typos corrected
Bi-Directional Generation for Unsupervised Domain Adaptation
Creators: name: Yang, Guanglei
name: Xia, Haifeng
name: Ding, Mingli
name: Ding, Zhengming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Unsupervised domain adaptation facilitates the unlabeled target domain relying on well-established source domain information. The conventional methods forcefully reducing the domain discrepancy in the latent space will result in the destruction of intrinsic data structure. To balance the mitigation of domain gap and the preservation of the inherent structure, we propose a Bi-Directional Generation domain adaptation model with consistent classifiers interpolating two intermediate domains to bridge source and target domains. Specifically, two cross-domain generators are employed to synthesize one domain conditioned on the other. The performance of our proposed method can be further enhanced by the consistent classifiers and the cross-domain alignment constraints. We also design two classifiers which are jointly optimized to maximize the consistency on target sample prediction. Extensive experiments verify that our proposed model outperforms the state-of-the-art on standard cross domain visual benchmarks.
description: 9 pages, 4 figures
The Fourier-Stieltjes and Fourier algebras for locally compact groupoids
Creators: name: Paterson, Alan L. T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 22A22;43A25

description: The Fourier-Stieltjes and Fourier algebras B(G), A(G) for a general locally compact group G, first studied by P. Eymard, have played an important role in harmonic analysis and in the study of operator algebras generated by G. Recently, there has been interest in developing versions of these algebras for locally compact groupoids, justification being that, just as in the group case, the algebras should play a useful role in the study of groupoid operator algebras. Versions of these algebras for the locally compact groupoid case appear in three related theories: (1) a measured groupoid theory (J. Renault), (2) a Borel theory (A. Ramsay and M. Walter), and (3) a continuous theory (A. Paterson). The present paper is expository in character. For motivational reasons, it starts with a description of the theory of B(G), A(G) in the locally compact group case, before discussing these three realted theories. Some open questions are also raised.
GAN-based Priors for Quantifying Uncertainty
Creators: name: Patel, Dhruv V.
name: Oberai, Assad A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Bayesian inference is used extensively to quantify the uncertainty in an inferred field given the measurement of a related field when the two are linked by a mathematical model. Despite its many applications, Bayesian inference faces challenges when inferring fields that have discrete representations of large dimension, and/or have prior distributions that are difficult to characterize mathematically. In this work we demonstrate how the approximate distribution learned by a deep generative adversarial network (GAN) may be used as a prior in a Bayesian update to address both these challenges. We demonstrate the efficacy of this approach on two distinct, and remarkably broad, classes of problems. The first class leads to supervised learning algorithms for image classification with superior out of distribution detection and accuracy, and for image inpainting with built-in variance estimation. The second class leads to unsupervised learning algorithms for image denoising and for solving physics-driven inverse problems.
title: Dissociating different temporal stages of emotional word processing by feature-based attention
Creators: name: Schindler, Sebastian
name: Vormbrock, Ria
name: Helming, Hanne
name: Straube, Thomas
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2025
Subjects: subject: 610 Medicine and health

description: Negative emotional content is prioritized across different stages of information processing as reflected by different components of the event-related potential (ERP). In this preregistered study (N = 40), we investigated how varying the attentional focus allows us to dissociate the involvement of specific ERP components in the processing of negative and neutral words. Participants had to discriminate the orientation of lines overlaid onto the words, the word type (adjective/noun), or the emotional content (negative/neutral). Thus, attention was either not focused on words (distraction task), non-emotional aspects, or the emotional relevance of words. Regardless of the task, there were no significant differences between negative and neutral words for the P1, N1, or P2 components. In contrast, interactions between emotion and task were observed for the early posterior negativity (EPN) and late positive potential (LPP). EPN differences were absent during the distraction task but were present in the other two tasks. LPP emotion differences were found only when attention was directed to the emotional content of words. Our study adds to the evidence that early ERP components do not reliably separate negative and neutral words. However, results show that mid-latency and late stages of emotion processing are separable by different attention tasks. The EPN represents a stage of attentional enhancement of negative words given sufficient attentional resources. Differential activations during the LPP stage are associated with more elaborative processing of the emotional meaning of words.
description: Finanziert über die DEAL-Vereinbarung mit Wiley, Springer oder Elsevier 2019–2023.
S_Nasal_Colonization_as_a_Risk_Factor_for_Staphylo.pdf
Creators: name: Shuaibu Suleiman
Publisher: name: figshare
Year: 2020
Subjects: subject: 111503 Clinical Pharmacy and Pharmacy Practice
subject: FOS: Clinical medicine

description: Abstract: Staphylococcus aureus (S. aureus) is a gram-positive bacterium found in clinical and community settings across the world. It is a major cause of both nosocomial and community-acquired staphylococcal infections. Nasal carriage rates of S. aureus and Methicillin resistant Staphylococcus aureus (MRSA) among hospital and nonhospital centres have been reported in several Nigerian studies. Nevertheless, most of these studies presented local data, and no systematic study has been performed. Only 41 studies were included in this meta-analysis out of which only 24 studies reported MRSA colonization rates. The Meta-analysis of included studies reveals the pooled random effects estimate of nasal carriage of S. aureus and MRSA in Nigeria to be 41.5% (95% CI: 36.3-46.9) and 36.4% (95% CI: 27.7- 46.1), respectively. The high level of heterogeneity (S. aureus, 94% and MRSA, 92%) found in this study cannot be explained by chance, but by differences in study populations, methodology and geographical regions. Although not all infections are causally related to persistent S. aureus and MRSA carriages, there is sufficient data to show that colonization by MRSA may act as a reservoir that can subsequently develop into an infection, once immunity wanes or immune defenses are breached. Therefore, proper screening and decolonization strategies should be nationally employed.
Properties of Early-Type, Dry Galaxy Mergers and the Origin of Massive Elliptical Galaxies
Creators: name: Naab, Thorsten
name: Khochfar, Sadegh
name: Burkert, Andreas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The luminosity dependence of kinematical and isophotal properties of elliptical galaxies is investigated using numerical simulations of galaxy merging, combined with semi-analytical models of hierarchical structure formation. Mergers of spiral galaxies as the only formation mechanism for elliptical galaxies can neither reproduce the kinematical and photometric properties of very massive elliptical galaxies nor the change from rotationally flattened disky to anisotropic boxy systems with increasing luminosity. We present numerical simulations showing that binary mergers of early-type galaxies open an additional channel for the formation of anisotropic, slowly rotating and boxy ellipticals. Including this channel in a semi-analytical model we can successfully reproduce the observed trend that more luminous giant ellipticals are more boxy and less flattened by rotation. This trend can be strengthened by suppressing residual gas infall and star formation for galaxies with stellar bulge masses $M_* \geq 3 \times 10^{10} M_{\odot}$. Hence we propose that mergers of early-type galaxies play an important role for the assembly of massive elliptical galaxies.
description: accepted for publication by ApJL
Initial Design of a High-Power Ka-Band Klystron
Creators: name: Behtouei, Mostafa
name: Faillace, Luigi
name: Ferrario, Massimo
name: Spataro, Bruno
name: Variola, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Accelerating structures operating in Ka-Band are foreseen to achieve gradients around 150 MV/m. Among possible applications of a Ka-Band accelerating structure we refer to the beam phase-space manipulation for the Compact Light XLS project as well as medical and industrial applications. In this paper, a Ka-Band Klystron amplifier is being investigated in order to feed Ka-Band accelerating structures. The initial design is presented including the high-power DC gun and the beam focusing channel.
description: 4th European Advanced Accelerator Concepts Workshop (EAAC2019)
Secondary metabolites from Verbascum bugulifolium Lam. and their bioactivities
Creators: name: Ayşe Gökmen
name: Kúsz, Norbert
name: Nursenem Karaca
name: Demirci, Fatih
name: Hohmann, Judit
name: Kırmızıbekmez, Hasan
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified

description: Five iridoid glycosides catalpol (1), specioside (2), ajugol (3), ajugoside (4), 8-O-acetylharpagide (5), two phenylethanoid glycosides, verbascoside (6) and glucopyranosyl-(1→Gi-6)-martynoside (7), four flavonoids, luteolin (8), luteolin 7-O-β-glucopyranoside (9), luteolin 7-O-rutinoside (10), apigenin 7-O-rutinoside (11), quercetin 3-O-rutinoside (12) and β-sitosterol (13) were isolated from the aerial parts of Verbascum bugulifolium Lam. for the first time. Their structures were elucidated by NMR and MS experiments. The extracts, and the isolates were evaluated for their in vitro antioxidant (DPPH•, ABTS• and CUPRAC), anti-inflammatory (LOX inhibition) and antimicrobial activities. Compounds 6 and 8 showed the highest antioxidant activity in all tests, where luteolin (8) showed the relatively best anti-inflammatory activity compared to other samples with 54.1 ± 5.0% inhibition at 1 µg/mL. All the tested compounds showed weak antimicrobial activity against tested microorganisms. This is the first phytochemical and bioactivity study on V. bugulifolium.
On contact pseudo-metric manifolds satisfying a nullity condition
Creators: name: Ghaffarzadeh, Narges
name: Faghfouri, Morteza
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper, we aim to introduce and study $(κ, μ)$-contact pseudo-metric manifold and prove that if the $φ$-sectional curvature of any point of $M$ is independent of the choice of $φ$-section at the point, then it is constant on $M$ and accordingly the curvature tensor. Also, we introduce generalized $(κ, μ)$-contact pseudo-metric manifold and prove for $n>1$, that a non-Sasakian generalized $(κ, μ)$-contact pseudo-metric manifold is a $(κ, μ)$-contact pseudo-metric manifold.
description: 21 pages
title: Trainee Teachers' Experience of Reflection: Personal and social constructions of experience
Creators: name: McKenzie, Elizabeth May
Publisher: name: The Open University
Year: 2011

description: The research on which this thesis draws investigated trainee teachers' experience of reflection whilst undertaking Certificate in Education or Post-graduate Certificate in Education programmes for the Post-Compulsory sector. It was based on a sequential, mixed methods design, employing a structured questionnaire and a semi-structured interview. During the first stage of data collection, a sample of 127 trainee teachers completed a questionnaire about their experience of reflection and keeping a reflective journal. Findings indicated that the majority of trainees had a clear understanding of reflection and how it contributed to the development of their professional practice. A minority were less certain about the nature of reflective learning and its application to professional development. Most expressed agreement that keeping a reflective journal supported their professional learning. However, a substantial minority indicated difficulties with journal writing. In the second stage of data collection, interview findings of 15 trainee teachers broadly supported the questionnaire findings about trainees' understanding of the purpose of reflection and its perceived value. However, analysis of the interview data indicated that there were individual differences in engagement with reflection, leading to some trainees experiencing difficulties, particularly with journal writing. The thesis argues that reflective learning for professional development involves a personal-social dimension in trainees' mode of engagement and this is related to personal and social constructions of experience. The thesis questions the use of the metaphor of 'reflection', arguing that the multiple reflections and changing images in a kaleidoscope offer a better analogy. The thesis proposes a theoretical model to integrate the content and process aspects of reflection, evident in previous models and typologies. This re-conceptualisation forms the basis for a practical application, the PERHAPS? model, which incorporates process and content and acknowledges different modes of engagement with reflection.
Positive and negative incentive contrasts lead to relative value perception in ants
Creators: name: Wendt, Stephanie
name: Strunk, Kim S.
name: Heinze, Jürgen
name: Roider, Andreas
name: Czaczkes, Tomer J.
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: 590 Tiere (Zoologie)

description: Humans usually assess things not according to their absolute value, but relative to reference points – a main tenant of Prospect Theory. For example, people rate a new salary relative to previous salaries and salaries of their peers, rather than absolute income. We demonstrate a similar effect in an insect: ants expecting to find low-quality food showed higher acceptance of medium-quality food than ants expecting medium quality, and vice versa for high expectations. Further experiments demonstrate that these contrast effects arise from cognitive rather than mere sensory or pre-cognitive perceptual causes. Social information gained inside the nest can also serve as a reference point: the quality of food received from other ants affected the perceived value of food found later. Value judgement is a key element in decision making, and thus relative value perception strongly influences which option is chosen and ultimately how all animals make decisions.
Sustainability : UBC Food System : educational role of UBC Farm
Creators: name: De Cook, Barb
name: Dhudwal, Parminder
name: Hackett, Mignon
name: Mak, Catherine
name: Ng, Kay
name: Toth, Ldiko
name: Wakaki, Izumi
Publisher: name: The University of British Columbia
Year: 2014

description: There are two barriers that must be overcome to reach economic, environmental and social sustainability of the UBC Food System; the lack of awareness of what a sustainable food system is, and the disconnection of the UBC community from the natural environment that would support such a system. This can be achieved through education, specifically using the UBC Farm. The Farm provides a vital link for students, staff and faculty between the consumption and production of food and can be used to develop a strong sense of community and inform community members about sustainable food production. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Pensamiento propio
Creators: name: Garcia, Marco Aurelio
name: Velasco e Cruz, Sebastião C.
name: Sánchez Egozcue, Jorge Mario
name: Shelton-Colby, Sally
name: Treto, Carlos Alzugaray
Publisher: name: Trilingue De Ciencias Sociales De America Latina Y El Caribe
Year: 2023
Subjects: classificationCode: 44
subject: Human society

description: Description to be added
Isolated modes and percolation in lattice dynamics of (Be,Zn)Se
Creators: name: Postnikov, A. V.
name: Pages, O.
name: Tite, T.
name: Ajjoun, M.
name: Hugel, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A mixed II-VI semiconductor Zn[1-x]Be[x]Se possesses non-trivial vibration properties, because its two constituent compounds, ZnSe and BeSe, show very different degree of covalency and hence high elastic contrast. An anomalous Be-Se vibration line has been observed mostly at intermediate Be content in the Raman spectra of thin (Zn,Be)Se films. In order to explain microscopic origins and the detailed composition of these lines, a first-principles calculation of vibration frequencies in a mixed crystal has been done, with frozen-phonon technique and supercell setup within the density functional theory, by the Siesta method, which uses norm-conserving pseudopotentials and strictly localized numerical basis functions. The calculations confirmed an earlier assumption that the anomalous Be-Se line appears due to the formation of continuous chains of a more rigid Be-rich pseudo-continuous phase formed within the more soft Zn-rich host region on crossing the Be-Se bond percolation threshold (~0.19). Different local deformation in percolated and non-percolated regions affect interatomic elastic interactions and split corresponding vibration lines. Besides confirming the percolation model qualitatively, the calculation provides details about vibration patterns in different phonon modes.
description: 12 pages, 5 Postscript figures, submitted to Phase Transitions as proceedings of the SDHS'03 Symposium, Duisburg, November 2003
Mean-Field and Anomalous Behavior on a Small-World Network
Creators: name: Hastings, M. B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use scaling results to identify the crossover to mean-field behavior of equilibrium statistical mechanics models on a variant of the small world network. The results are generalizable to a wide-range of equilibrium systems. Anomalous scaling is found in the width of the mean-field region, as well as in the mean-field amplitudes. Finally, we consider non-equilibrium processes.
description: 4 pages, 0 figures; reference added
Understanding HPC Benchmark Performance on Intel Broadwell and Cascade Lake Processors
Creators: name: Alappat, Christie L.
name: Hofmann, Johannes
name: Hager, Georg
name: Fehske, Holger
name: Bishop, Alan R.
name: Wellein, Gerhard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Hardware platforms in high performance computing are constantly getting more complex to handle even when considering multicore CPUs alone. Numerous features and configuration options in the hardware and the software environment that are relevant for performance are not even known to most application users or developers. Microbenchmarks, i.e., simple codes that fathom a particular aspect of the hardware, can help to shed light on such issues, but only if they are well understood and if the results can be reconciled with known facts or performance models. The insight gained from microbenchmarks may then be applied to real applications for performance analysis or optimization. In this paper we investigate two modern Intel x86 server CPU architectures in depth: Broadwell EP and Cascade Lake SP. We highlight relevant hardware configuration settings that can have a decisive impact on code performance and show how to properly measure on-chip and off-chip data transfer bandwidths. The new victim L3 cache of Cascade Lake and its advanced replacement policy receive due attention. Finally we use DGEMM, sparse matrix-vector multiplication, and the HPCG benchmark to make a connection to relevant application scenarios.
description: 19 pages, 9 figures, 3 tables. Corrected affiliations and acknowledgments
Defining and measuring the 'global health agenda'
Creators: name: Shiffman, Jeremy
name: Berlan, David
name: AbouAssi, Khaldoun
name: Elberger, Ben
name: Cordero, Amy
name: Soper, Tim
name: Roe, Shannon
name: Kosman, Mary
Publisher: name: American University
Year: 2023

description: Scholars and policy-makers frequently use the term ‘global health agenda’ or some variant, usually because they are expressing a concern that an issue is neglected. Rarely do they define what they mean by the concept, making it unclear what they are referring to. We offer a working definition: ‘the list of health issues that a set of elite organizations involved in global health are paying attention to at any given point in time.’ We then offer some recommendations on how the agenda status of any given health issue might be measured and draw some initial findings from these measures, examining which issues get attention, whether attention corresponds to burden, and how different dimensions of agenda status such as media attention and donor funding relate to one another. The aim of offering definitional clarity and a means of indicating agenda status is to advance the study of agenda-setting in global health, so that we might move beyond impressionistic statements and toward empirical measures of what issues are and are not receiving attention in global health, and in which arenas that attention is appearing.
Introduction
Creators: name: Wood, Johanna
Publisher: name: Journal of Historical Syntax
Year: 2021

description: The papers in this special edition of JHS represent a selection of those presented in Tempe, featuring data from a number of languages and language families. As well as the usual suspects, the Romance and Germanic families, Arabic and Greek are featured; additionally, authors bring in supporting examples from several other languages, including those as diverse as Yup’ik and Yao. Grammaticalisation as a process is prominent in many of the approaches, applying generative theories such as upward reanalysis (Roberts & Roussou 2003), economy-based constraints like the Head Preference Principle and Late Merge Principle (van Gelderen 2004) and the Linguistic Cycle (van Gelderen 2011). Several authors take up quantitative methods and, though it is many years since the recognition that more than one grammar can exist in the E-language, the ‘grammars in competition model’ (Kroch 1994, Pintzuk 1999) remains relevant.
description: Journal of Historical Syntax, Vol 5 No 16-25 (2021): Proceedings of the 21st Diachronic Generative Syntax (DiGS) Conference
Leibniz superalgebras with a set grading
Creators: name: Albuquerque, Helena
name: Barreiro, Elisabete
name: Calderón, Antonio J.
name: Sánchez, José M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Consider a Leibniz superalgebra $\mathfrak L$ additionally graded by an arbitrary set $I$ (set grading). We show that $\mathfrak L$ decomposes as the sum of well-described graded ideals plus (maybe) a suitable linear subspace. In the case of ${\mathfrak L}$ being of maximal length, the simplicity of ${\mathfrak L}$ is also characterized in terms of connections.
South Campus Farm : land-use conflict
Creators: name: Glavas, Katarina
name: Rosen, Annie
name: Khaul, Rema
name: Lau, Ivan
name: Lo, Tracy
name: Chiu, Peter
name: Trkulja, Vojislav
Publisher: name: The University of British Columbia
Year: 2014

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Moving breathers in bent DNA with realistic parameters
Creators: name: Cuevas, J.
name: Starikov, E. B.
name: Archilla, J. F. R.
name: Hennig, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Recent papers have considered moving breathers (MBs) in DNA models including long range interaction due to the dipole moments of the hydrogen bonds. We have recalculated the value of the charge transfer when hydrogen bonds stretch using quantum chemical methods which takes into account the whole nucleoside pairs. We explore the consequences of this value on the properties of MBs, including the range of frequencies for which they exist and their effective masses. They are able to travel through bending points with fairly large curvatures provided that their kinetic energy is larger than a minimum energy which depends on the curvature. These energies and the corresponding velocities are also calculated in function of the curvature.
description: 4 pages and 4 figures
The chromatic filtration of the Burnside category
Creators: name: Szymik, Markus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: Group Theory (math.GR)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: The Segal map connects the Burnside category of finite groups to the stable homotopy category of their classifying spaces. The chromatic filtrations on the latter can be used to define filtrations on the former. We prove a related conjecture of Ravenel's in some cases, and present counterexamples to the general statement.
description: 28 pages
Defining and measuring the 'global health agenda'
Creators: name: Shiffman, Jeremy
name: Berlan, David
name: AbouAssi, Khaldoun
name: Elberger, Ben
name: Cordero, Amy
name: Soper, Tim
name: Roe, Shannon
name: Kosman, Mary
Publisher: name: American Political Science Association
Year: 2023
Subjects: classificationCode: 4206
subject: Public health

description: Scholars and policy-makers frequently use the term ‘global health agenda’ or some variant, usually because they are expressing a concern that an issue is neglected. Rarely do they define what they mean by the concept, making it unclear what they are referring to. We offer a working definition: ‘the list of health issues that a set of elite organizations involved in global health are paying attention to at any given point in time.’ We then offer some recommendations on how the agenda status of any given health issue might be measured and draw some initial findings from these measures, examining which issues get attention, whether attention corresponds to burden, and how different dimensions of agenda status such as media attention and donor funding relate to one another. The aim of offering definitional clarity and a means of indicating agenda status is to advance the study of agenda-setting in global health, so that we might move beyond impressionistic statements and toward empirical measures of what issues are and are not receiving attention in global health, and in which arenas that attention is appearing.