cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
How limiting is optical follow-up for fast radio burst applications? Forecasts for radio and optical surveys
Creators: name: Jahns, Joscha N.
name: Spitler, Laura G.
name: Walker, Charles R. H.
name: Baugh, Carlton M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Fast radio bursts (FRBs) are the first cosmological radio sources that vary on millisecond timescales, which makes them a unique probe of the Universe. Many proposed applications of FRBs require associated redshifts. These can only be obtained by localizing FRBs to their host galaxies and subsequently measuring their redshifts. Upcoming FRB surveys will provide arcsecond localization for many FRBs, not all of which can be followed up with dedicated optical observations. We aim to estimate the fraction of FRB hosts that will be catalogued with redshifts by existing and future optical surveys. We use the population synthesis code frbpoppy to simulate several FRB surveys, and the semi-analytical galaxy formation code GALFORM to simulate their host galaxies. We obtain redshift distributions for the simulated FRBs and the fraction with host galaxies in a survey. Depending on whether FRBs follow the cosmic star formation rate or stellar mass, 20 to 40 per cent of CHIME FRB hosts will be observed in an SDSS-like survey, all at $z<0.5$. The deeper DELVE survey will detect 63 to 85 per cent of ASKAP FRBs found in its coherent search mode. CHIME FRBs will reach $z\sim 3$, SKA1-Mid FRBs $z\sim 5$, but ground based follow-up is limited to $z\lesssim 1.5$. We discuss consequences for several FRB applications. If $\sim1/2$ of ASKAP FRBs have measured redshifts, 1000 detected FRBs can be used to constrain $Ω_\text{b} h_{70}$ to within $\sim10$ per cent at 95 per cent credibility. We provide strategies for optimized follow-up, when building on data from existing surveys. Data and codes are made available.
description: 18 pages, 16 figures, 4 tables, accepted for publication in MNRAS. Code available at https://github.com/JoschaJ/mockFRBhosts
The Integration of form and meaning in the verse structure of Milton's Paradise Lost
Creators: name: Sloan, Lawrence William
Publisher: name: University of Calgary
Year: 1975
Subjects: subject: PR 3562 S55 1975 Microfiche
subject: Milton, John, 1608-1674. Paradise Lost
subject: Milton, John, 1608-1674 - Style

description: Bibliography: p. 106-107.
Stress-Based Production, and Characterization of Glutathione Peroxidase and Glutathione S-Transferase Enzymes From Lactobacillus plantarum
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: Lactobacillus plantarum
glutathione s-transferase
glutathione-peroxidase
enzymatic activity
purification

description: © Copyright © 2020 Al-Madboly, Ali, Fakharany, Ragab, Khedr and Elokely. More attention has been recently directed toward glutathione peroxidase and s-transferase enzymes because of the great importance they hold with respect to their applications in the pharmaceutical field. This work was conducted to optimize the production and characterize glutathione peroxidase and glutathione s-transferase produced by Lactobacillus plantarum KU720558 using Plackett-Burman and Box-Behnken statistical designs. To assess the impact of the culture conditions on the microbial production of the enzymes, colorimetric methods were used. Following data analysis, the optimum conditions that enhanced the s-transferase yield were the De Man-Rogosa-Sharp (MRS) broth as a basal medium supplemented with 0.1% urea, 0.075% H2O2, 0.5% 1-butanol, 0.0125% amino acids, and 0.05% SDS at pH 6.0 and anaerobically incubated for 24 h at 40°C. The optimum s-transferase specific activity was 1789.5 U/mg of protein, which was ~12 times the activity of the basal medium. For peroxidase, the best medium composition was 0.17% urea, 0.025% bile salt, 7.5% Na Cl, 0.05% H2O2, 0.05% SDS, and 2% ethanol added to the MRS broth at pH 6.0 and anaerobically incubated for 24 h at 40°C. Furthermore, the optimum peroxidase specific activity was 612.5 U/mg of protein, indicating that its activity was 22 times higher than the activity recorded in the basal medium. After SDS-PAGE analysis, GST and GPx showed a single protein band of 25 and 18 kDa, respectively. They were able to retain their activities at an optimal temperature of 40°C for an hour and pH range 4–7. The 3D model of both enzymes was constructed showing helical structures, sheet and loops. Protein cavities were also detected to define druggable sites. GST model had two large pockets; 185Å3 and 71 Å3 with druggability score 0.5–0.8. For GPx, the pockets were relatively smaller, 71 Å3 and 32 Å3 with druggability score (0.65–0.66). Therefore, the present study showed that the consortium components as well as the stress-based conditions used could express both enzymes with enhanced productivity, recommending their application based on the obtained results.
Gamma-Ray Emission from Two Blazars Behind the Galactic Plane: B2013+370 & B2023+336
Creators: name: Kara, E.
name: Errando, M.
name: Max-Moerbeck, W.
name: Aliu, E.
name: Bottcher, M.
name: Fortin, P.
name: Halpern, J. P.
name: Mukherjee, R.
name: Readhead, A. C. S.
name: Richards, J. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: B2013+370 and B2023+336 are two blazars at low-galactic latitude that were previously proposed to be the counterparts for the EGRET unidentified sources, 3EG J2016+3657 and 3EG J2027+3429. Gamma-ray emission associated with the EGRET sources has been detected by the Fermi Gamma-ray Space Telescope, and the two sources, 1FGL J2015.7+3708 and 1FGL J2027.6+3335, have been classified as unidentified in the 1-year catalog. This analysis of the Fermi-LAT data collected during 31 months reveals that the 1FGL sources are spatially compatible with the blazars, and are significantly variable, supporting the hypothesis of extragalactic origin for the gamma-ray emission. The gamma-ray light curves are compared with 15 GHz radio light curves from the 40-m telescope at the Owens Valley Radio Observatory (OVRO). Simultaneous variability is seen in both bands for the two blazar candidates. The study is completed with the X-ray analysis of 1FGL J2015.7+3708 using Swift observations that were triggered in August 2010 by a Fermi-detected flare. The resulting spectral energy distribution shows a two-component structure typical of blazars. We also identify a second source in the field of view of 1FGL J2027.6+3335 with similar characteristics to the known LAT pulsars. This study gives solid evidence favoring blazar counterparts for these two unidentified EGRET and Fermi sources, supporting the hypothesis that a number of unidentified gamma-ray sources at low galactic latitudes are indeed of extragalactic origin.
description: 10 pages, 7 figures, 6 tables, accepted for publication in The Astrophysical Journal
Mixed convection instability in a viscosity stratified flow in a vertical channel
Creators: name: Ankush
name: Narayana, P. A. L.
name: Sahu, K. C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The present study examines the linear instability characteristics of double-diffusive mixed convective flow in a vertical channel with viscosity stratification. The viscosity of the fluid is modelled as an exponential function of temperature and concentration, with an activation energy parameter determining its sensitivity to temperature variation. Three scenarios are considered: buoyancy force due to thermal diffusion only, buoyancy force due to temperature and solute acting in the same direction, and buoyancy force due to temperature and solute acting in opposite directions. A generalized eigenvalue problem is derived and solved numerically for linear stability analysis via the Chebyshev spectral collocation method. Results indicate that higher values of the activation energy parameter lead to increased flow stability. Additionally, when both buoyant forces act in opposite directions, the Schmidt number has both stabilizing and destabilizing effects across the range of activation energy parameters, similar to the case of pure thermal diffusion. Furthermore, the solutal-buoyancy-opposed base flow is found to be the most stable, while the solutal-buoyancy-assisted base flow is the least stable. As expected, an increase in Reynolds number is shown to decrease the critical Rayleigh number.
description: 10 pages, 9 figures, Physics of Fluids
A model for translating metaphors in proverbs (French to English) : a cognitive descriptive approach
Creators: name: Wilson, Freeda Catherine
Publisher: name: University of British Columbia
Year: 2009

description: This thesis presents a model for the translation of proverbs which is multidisciplinary in that it draws on an analysis of theories of metaphor, connotations, context and translation. The culmination of various viewpoints, such as those of cognitive science, translation, semiotics, and comparative linguistics substantiates, in conjunction with the support of a detailed analysis of French and English proverb translations, that translation is a multidisciplinary process, and that a multidisciplinary viewpoint is necessary for the understanding of the translation process. The diversity of premises included in this thesis offer insight into various aspects of translation. Each premise relies on its own area of expertise and jointly they form an overall process that represents the translation of proverbs from French to English. A concept, as well as its components, must be translated in the translational process, including, but not limited to, the message, meaning(s), connotations and linguistic structure of the original text, as well as the information derived from sources external to the linguistic structure, such as information located in the text or in the readerřs own knowledge of the world. This paper proceeds with a methodological progression through seminal theories, beginning with metaphors and followed by proverbs, translation and comparative linguistics, and concludes with a comprehensive examination of a corpus of French and English proverb translations. Fundamental to the entire translation process is that translation is a cognitive activity, involving multiple processes that are sequential, simultaneous and interdependent. Therefore, the translation model is composed of two levels, how translation occurs and what occurs, as the processes and methods are two different, yet simultaneous, aspects of the translation model. Proverbs were chosen as the corpus and focus of this thesis due to their intensively cultural and metaphoric nature, as well as their received translation pairings. My thesis will also demonstrate that proverbs offer a vast and reliable source of French to English translations, through their use in demonstrating that a model for the translation of metaphors in proverbs is possible.
Measurements of Heavy Flavor and Di-electron Production at STAR
Creators: name: Wang, Gang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Heavy quarks are produced early in the relativistic heavy ion collisions, and provide an excellent probe into the hot and dense nuclear matter created at RHIC. In these proceedings, we will discuss recent STAR measurements of heavy flavor production, to investigate the heavy quark interaction with the medium. Electromagnetic probes, such as electrons, provide information on the various stages of the medium evolution without modification by final stage interactions. Di-electron production measurements by STAR will also be discussed.
description: 5 pages, 6 figures, proceedings for CPOD2011
Power and pitfalls of computational methods for inferring clone phylogenies and mutation orders from bulk sequencing data
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: Computational Biology
Databases, Genetic
Genetic Heterogeneity
Humans
Neoplasms
Polymorphism, Single Nucleotide

description: © 2020, The Author(s). Tumors harbor extensive genetic heterogeneity in the form of distinct clone genotypes that arise over time and across different tissues and regions in cancer. Many computational methods produce clone phylogenies from population bulk sequencing data collected from multiple tumor samples from a patient. These clone phylogenies are used to infer mutation order and clone origins during tumor progression, rendering the selection of the appropriate clonal deconvolution method critical. Surprisingly, absolute and relative accuracies of these methods in correctly inferring clone phylogenies are yet to consistently assessed. Therefore, we evaluated the performance of seven computational methods. The accuracy of the reconstructed mutation order and inferred clone groupings varied extensively among methods. All the tested methods showed limited ability to identify ancestral clone sequences present in tumor samples correctly. The presence of copy number alterations, the occurrence of multiple seeding events among tumor sites during metastatic tumor evolution, and extensive intermixture of cancer cells among tumors hindered the detection of clones and the inference of clone phylogenies for all methods tested. Overall, CloneFinder, MACHINA, and LICHeE showed the highest overall accuracy, but none of the methods performed well for all simulated datasets. So, we present guidelines for selecting methods for data analysis.
Extracting $B \to K^*$ Form Factors from Data
Creators: name: Hambrock, Christian
name: Hiller, Gudrun
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We extract ratios of $B \to K^*$ form factors at low hadronic recoil from recent data on $B \to K^* μ^+ μ^-$ decays in a model-independent way. The presented method will improve in the future with further (angular) studies in semileptonic rare B-decays and advance our understanding of form factors, which are important inputs in precision tests of the Standard Model.
Active Stars in the Spectroscopic Survey of Mid-to-Late M Dwarfs Within 15pc
Creators: name: Pass, Emily K
name: Winters, Jennifer G
name: Charbonneau, David
name: Irwin, Jonathan M
name: Medina, Amber A
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present results from the volume-complete spectroscopic survey of 0.1-0.3M$_\odot$ M dwarfs within 15pc. This work discusses the active sample without close binary companions, providing a comprehensive picture of these 123 stars with H$α$ emission stronger than -1$\unicode{xC5}$. Our analysis includes rotation periods (including 31 new measurements), H$α$ equivalent widths, rotational broadening, inclinations, and radial velocities, determined using high-resolution, multi-epoch spectroscopic data from the TRES and CHIRON spectrographs supplemented by photometry from TESS and MEarth. Using this volume-complete sample, we establish that the majority of active, low-mass M dwarfs are very rapid rotators: specifically, 74$\pm$4% have rotation periods shorter than 2 days, while 19$\pm$4% have intermediate rotation periods of 2-20 days, and the remaining 8$\pm$3% have periods longer than 20 days. Among the latter group, we identify a population of stars with very high H$α$ emission, which we suggest is indicative of dramatic spindown as these stars transition from the rapidly to slowly rotating modes. We are unable to determine rotation periods for six stars and suggest that some of the stars without measured rotation periods may be viewed pole-on, as such stars are absent from the distribution of inclinations we measure; this lack notwithstanding, we recover the expected isotropic distribution of spin axes. Our spectroscopic and photometric data sets also allow us to investigate activity-induced radial-velocity variability, which we show can be estimated as the product of rotational broadening and the photometric amplitude of spot modulation.
description: Accepted for publication in AJ; 18 pages, 12 figures, 3 tables
Climate-induced changes in the suitable habitat of cold-water corals and commercially important deep-sea fishes in the North Atlantic
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: climate change
cold-water corals
deep-sea
fisheries
fishes
habitat suitability modelling
octocorals
scleractinians
species distribution models
vulnerable marine ecosystems

description: © 2020 The Authors. Global Change Biology published by John Wiley & Sons Ltd The deep sea plays a critical role in global climate regulation through uptake and storage of heat and carbon dioxide. However, this regulating service causes warming, acidification and deoxygenation of deep waters, leading to decreased food availability at the seafloor. These changes and their projections are likely to affect productivity, biodiversity and distributions of deep-sea fauna, thereby compromising key ecosystem services. Understanding how climate change can lead to shifts in deep-sea species distributions is critically important in developing management measures. We used environmental niche modelling along with the best available species occurrence data and environmental parameters to model habitat suitability for key cold-water coral and commercially important deep-sea fish species under present-day (1951–2000) environmental conditions and to project changes under severe, high emissions future (2081–2100) climate projections (RCP8.5 scenario) for the North Atlantic Ocean. Our models projected a decrease of 28%–100% in suitable habitat for cold-water corals and a shift in suitable habitat for deep-sea fishes of 2.0°–9.9° towards higher latitudes. The largest reductions in suitable habitat were projected for the scleractinian coral Lophelia pertusa and the octocoral Paragorgia arborea, with declines of at least 79% and 99% respectively. We projected the expansion of suitable habitat by 2100 only for the fishes Helicolenus dactylopterus and Sebastes mentella (20%–30%), mostly through northern latitudinal range expansion. Our results projected limited climate refugia locations in the North Atlantic by 2100 for scleractinian corals (30%–42% of present-day suitable habitat), even smaller refugia locations for the octocorals Acanella arbuscula and Acanthogorgia armata (6%–14%), and almost no refugia for P. arborea. Our results emphasize the need to understand how anticipated climate change will affect the distribution of deep-sea species including commercially important fishes and foundation species, and highlight the importance of identifying and preserving climate refugia for a range of area-based planning and management tools.
Consistency of Milton's moral vision as reflected in selected prose and poetry
Creators: name: McPhee, Maureen Elaine
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: PR 3592 R4 M24 1972 Microfilm
subject: Milton, John, 1608-1674
subject: Religion in literature
subject: Ethics in literature

description: Bibliography: p. 139-143.
Self-regulated radius of spontaneously formed GaN nanowires in molecular beam epitaxy
Creators: name: Fernández-Garrido, Sergio
name: Kaganer, Vladimir M.
name: Sabelfeld, Karl K.
name: Gotschke, Tobias
name: Grandal, Javier
name: Calleja, Enrique
name: Geelhaar, Lutz
name: Brandt, Oliver
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the axial and radial growth of GaN nanowires upon a variation of the Ga flux during molecular beam epitaxial growth. An increase in the Ga flux promotes radial growth without affecting the axial growth rate. In contrast, a decrease in the Ga flux reduces the axial growth rate without any change in the radius. These results are explained by a kinetic growth model that accounts for both the diffusion of Ga adatoms along the side facets towards the nanowire tip and the finite amount of active N available for the growth. The model explains the formation of a new equilibrium nanowire radius after increasing the Ga flux and provides an explanation for two well known but so far not understood experimental facts: the necessity of effectively N-rich conditions for the spontaneous growth of GaN nanowires and the increase in nanowire radius with increasing III/V flux ratios.
Evaluating a couple-based intervention addressing sexual concerns for breast cancer survivors: Study protocol for a randomized controlled trial
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: Breast cancer
Sexual dysfunction
Intimacy
Telephone-based
Randomized controlled trial

description: © 2020 The Author(s). Background: Sexual concerns are distressing for breast cancer survivors and interfere with their intimate relationships. This study evaluates the efficacy of a four-session couple-based intervention delivered via telephone, called Intimacy Enhancement (IE). The IE intervention is grounded in social cognitive theory and integrates evidence-based techniques from cognitive behavioral couple therapy and sex therapy to address survivors' sexual concerns and enhance their and their partners' sexual, relationship, and psychological outcomes. Methods: This trial is designed to evaluate the efficacy of the IE intervention in improving survivors' sexual function, the primary study outcome. Secondary outcomes include survivors' sexual distress, partners' sexual function, and survivors' and partners' relationship intimacy and quality as well as psychological distress (depressive symptoms and anxiety symptoms). Additional aims are to examine whether treatment effects on patient sexual function are mediated by sexual communication and self-efficacy for coping with sexual concerns and to explore whether survivor age and race/ethnicity moderate intervention effects on survivors' sexual function. Eligible adult female breast cancer survivors reporting sexual concerns and their intimate partners are recruited from two academic sites in the USA and are randomized to either the IE intervention or to a control condition of equal length offering education and support around breast cancer-related health topics (Living Healthy Together). The target sample size is 120 couples. Self-report outcome measures are administered to participants in both conditions at baseline (T1), post-treatment (T2), 3 months post-treatment (T3), and 6 months post-treatment (T4). Discussion: Evidence-based interventions are needed to address sexual concerns for breast cancer survivors and to enhance their and their intimate partners' sexual, relationship, and psychological well-being. This randomized controlled trial will allow us to examine the efficacy of a novel couple-based intervention delivered via telephone for breast cancer survivors experiencing sexual concerns and their intimate partners, in comparison with an attention control. Findings of this study could influence clinical care for women with breast cancer and inform theory guiding cancer-related sexual rehabilitation. Trial registration: ClinicalTrials.gov, NCT03930797. Registered on 24 April 2019.
Variable stars in the globular cluster M28 (NGC 6626)
Creators: name: Prieto, G.
name: Catelan, M.
name: Ramos, R. Contreras
name: Pritzl, B. J.
name: Smith, H. A.
name: Alonso-Garcia, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new search for variable stars in the Galactic globular cluster M28 (NGC 6626). The search is based on a series of BVI images obtained with the SMARTS Consortium's 1.3m telescope at Cerro Tololo Inter-American Observatory, Chile. The search was carried out using the ISIS v2.2 image subtraction package. We find a total of 25 variable stars in the field of the cluster, 9 being new discoveries. Of the newly found variables, 1 is an ab-type RR Lyrae star, 6 are c-type RR Lyrae, and 2 are long-period/semi-regular variables. V22, previously classified as a type II Cepheid, appears as a bona-fide RRc in our data. In turn, V20, previously classified as an ab-type RR Lyrae, could not be properly phased with any reasonable period. The properties of the ab-type RR Lyrae stars in M28 appear most consistent with an Oosterhoff-intermediate classification, which is unusual for bona-fide Galactic globulars clusters. However, the cluster's c-type variables do not clearly support such an Oosterhoff type, and a hybrid Oosterhoff I/II system is accordingly another possibility, thus raising the intriguing possibility of multiple populations being present in M28. Coordinates, periods, and light curves in differential fluxes are provided for all the detected variables.
description: A&A, in press
Significance of the rhyme and varying line lengths of Samson Agonistes
Creators: name: Robertson, Susan
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: PR 3566 R62 1977 Microfiche
subject: Milton, John, 1608-1674. Samson Agonistes
subject: Milton, John, 1608-1674 - Versification

description: Bibliography: p. 98-104.
Review of soft interactions and multiparticle correlations
Creators: name: Trainor, Thomas A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent developments in the area of soft interactions and multiparticle correlations are reviewed, including higher harmonic flows conjectured to result from the initial-state geometry which might coincide with some jet-like correlation features in more-central A-A collisions.
description: 4 pages, 3 figures, to be published in the Proceedings of the XLI International Symposium on Multiparticle Dynamics (ISMD 2011), 26-30 September, 2011, Miyajima Island, Hiroshima, Japan
Diffuse Sources, Clustering and the Excess Anisotropy of the Radio Synchrotron Background
Creators: name: Cowie, F. J.
name: Offringa, A. R.
name: Gehlot, B. K.
name: Singal, J.
name: Heston, S.
name: Horiuchi, S.
name: Lucero, D. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the largest low frequency (120~MHz) arcminute resolution image of the radio synchrotron background (RSB) to date, and its corresponding angular power spectrum of anisotropies (APS) with angular scales ranging from $3^\circ$ to $0.3^\prime$. We show that the RSB around the North Celestial Pole has a significant excess anisotropy power at all scales over a model of unclustered point sources based on source counts of known source classes. This anisotropy excess, which does not seem attributable to the diffuse Galactic emission, could be linked to the surface brightness excess of the RSB. To better understand the information contained within the measured APS, we model the RSB varying the brightness distribution, size, and angular clustering of potential sources. We show that the observed APS could be produced by a population of faint clustered point sources only if the clustering is extreme and the size of the Gaussian clusters is $\lesssim 1'$. We also show that the observed APS could be produced by a population of faint diffuse sources with sizes $\lesssim 1'$, and this is supported by features present in our image. Both of these cases would also cause an associated surface brightness excess. These classes of sources are in a parameter space not well probed by even the deepest radio surveys to date.
description: 13 pages, 14 figures. Accepted for publication in MNRAS
Monitoring the formation of nanowires by line-of-sight quadrupole mass spectrometry: a comprehensive description of the temporal evolution of GaN nanowire ensembles
Creators: name: Fernández-Garrido, Sergio
name: Zettler, Johannes K.
name: Geelhaar, Lutz
name: Brandt, Oliver
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We use line-of-sight quadrupole mass spectrometry to monitor the spontaneous formation of GaN nanowires on Si during molecular beam epitaxy. We find that the temporal evolution of nanowire ensembles is well described by a double logistic function. The analysis of the temporal evolution of nanowire ensembles prepared under a wide variety of growth conditions allows us to construct a growth diagram which can be used to predict the average delay time that precedes nanowire formation.
Global and local mechanical properties control endonuclease reactivity of a DNA origami nanostructure
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: Allosteric Regulation
Base Sequence
Biomechanical Phenomena
DNA
Endodeoxyribonucleases
Molecular Dynamics Simulation
Nanostructures
Nucleic Acid Conformation

description: © The Author(s) 2020. Published by Oxford University Press on behalf of Nucleic Acids Research. We used coarse-grained molecular dynamics simulations to characterize the global and local mechanical properties of a DNA origami triangle nanostructure. The structure presents two metastable conformations separated by a free energy barrier that is lowered upon omission of four specific DNA staples (defect). In contrast, only one stable conformation is present upon removing eight staples. The metastability is explained in terms of the intrinsic conformations of the three trapezoidal substructures. We computationally modeled the local accessibility to endonucleases, to predict the reactivity of twenty sites, and found good agreement with the experimental data. We showed that global fluctuations affect local reactivity: the removal of the DNA staples increased the computed accessibility to a restriction enzyme, at sites as distant as 40 nm, due to an increase in global fluctuation. These results raise the intriguing possibility of the rational engineering of allosterically modulated DNA origami.
Serum Dopamine-b-Hydroxylase activity in human hypertension
Creators: name: Goerzen, Janice Lee
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: RC 685 H8 G64 1977
subject: Hypertension
subject: Dopamine-b-Hydroxylase
subject: Serum diagnosis

description: Bibliography: p. 82-89
Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph -- III. Dust Grains in Young L Dwarf Atmospheres Are Heavier
Creators: name: Suárez, Genaro
name: Metchev, Stanimir
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Analysis of all archival 5--14 micron spectra of field ultracool dwarfs from the Infrared Spectrograph on the Spitzer Space Telescope has shown that absorption by silicates in the 8--11 micron region is seen in most L-type (1300 K to 2200 K) dwarfs. The absorption is caused by silicate-rich clouds in the atmospheres of L dwarfs and is strongest at L4--L6 spectral types. Herein we compare averages of the mid-infrared silicate absorption signatures of L3--L7 dwarfs that have low ($\lesssim$10$^{4.5}$ cm s$^{-2}$) vs.\ high ($\gtrsim$10$^5$ cm s$^{-2}$) surface gravity. We find that the silicate absorption feature is sensitive to surface gravity and indicates a difference in grain size and composition between dust condensates in young and old mid-L dwarfs. The mean silicate absorption profile of low-gravity mid-L dwarfs matches expectations for $\sim$1 micron-sized amorphous iron- and magnesium-bearing pyroxene (Mg$_x$Fe$_{1-x}$SiO$_3$) grains. High-gravity mid-L dwarfs have silicate absorption better represented by smaller ($\lesssim$0.1 $μ$m) and more volatile amorphous enstatite (MgSiO$_3$) or SiO grains. This is the first direct spectroscopic evidence for gravity-dependent sedimentation of dust condensates in ultracool atmospheres. It confirms theoretical expectations for lower sedimentation efficiencies in low-gravity atmospheres and independently confirms their increased dustiness.
description: Accepted for publication in MNRAS
Characterizing lineage-specific evolution and the processes driving genomic diversification in chordates
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: Comparative genomics
Molecular evolution
Gene duplication
Pathway evolution
Protein structure

description: © 2020 The Author(s). Background: Understanding the origins of genome content has long been a goal of molecular evolution and comparative genomics. By examining genome evolution through the guise of lineage-specific evolution, it is possible to make inferences about the evolutionary events that have given rise to species-specific diversification. Here we characterize the evolutionary trends found in chordate species using The Adaptive Evolution Database (TAED). TAED is a database of phylogenetically indexed gene families designed to detect episodes of directional or diversifying selection across chordates. Gene families within the database have been assessed for lineage-specific estimates of dN/dS and have been reconciled to the chordate species to identify retained duplicates. Gene families have also been mapped to the functional pathways and amino acid changes which occurred on high dN/dS lineages have been mapped to protein structures. Results: An analysis of this exhaustive database has enabled a characterization of the processes of lineage-specific diversification in chordates. A pathway level enrichment analysis of TAED determined that pathways most commonly found to have elevated rates of evolution included those involved in metabolism, immunity, and cell signaling. An analysis of protein fold presence on proteins, after normalizing for frequency in the database, found common folds such as Rossmann folds, Jelly Roll folds, and TIM barrels were overrepresented on proteins most likely to undergo directional selection. A set of gene families which experience increased numbers of duplications within short evolutionary times are associated with pathways involved in metabolism, olfactory reception, and signaling. An analysis of protein secondary structure indicated more relaxed constraint in β-sheets and stronger constraint on alpha Helices, amidst a general preference for substitutions at exposed sites. Lastly a detailed analysis of the ornithine decarboxylase gene family, a key enzyme in the pathway for polyamine synthesis, revealed lineage-specific evolution along the lineage leading to Cetacea through rapid sequence evolution in a duplicate gene with amino acid substitutions causing active site rearrangement. Conclusion: Episodes of lineage-specific evolution are frequent throughout chordate species. Both duplication and directional selection have played large roles in the evolution of the phylum. TAED is a powerful tool for facilitating this understanding of lineage-specific evolution.
Influence of planets on debris disks in star clusters I: the 50 AU Jupiter
Creators: name: Wu, Kai
name: Kouwenhoven, M. B. N.
name: Spurzem, Rainer
name: Pang, Xiaoying
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Although debris disks may be common in exoplanet systems, only a few systems are known in which debris disks and planets coexist. Planets and the surrounding stellar population can have a significant impact on debris disk evolution. Here we study the dynamical evolution of debris structures around stars embedded in star clusters, aiming to determine how the presence of a planet affects the evolution of such structures. We combine NBODY6++GPU and REBOUND to carry out N-body simulations of planetary systems in star clusters (N=8000; Rh=0.78 pc) for a period of 100 Myr, in which 100 solar-type stars are assigned 200 test particles. Simulations are carried out with and without a Jupiter-mass planet at 50 au. We find that the planet destabilizes test particles and speeds up their evolution. The planet expels most particles in nearby and resonant orbits. Remaining test particles tend to retain small inclinations when the planet is present, and fewer test particles obtain retrograde orbits. Most escaping test particles with speeds smaller than the star cluster's escape speed originate from cold regions of the planetary system or from regions near the planet. We identify three regions within planetary systems in star clusters: (i) the private region of the planet, where few debris particles remain (40 - 60 au), (ii) the reach of the planet, in which particles are affected by the planet (0 - 400 au), and (iii) the territory of the planetary system, most particles outside which will eventually escape (0 - 700 au).
description: 17 pages, 20 figures, and 3 tables. Accepted for publication in MNRAS
Implications for the structure of the relativistic jet from multiwavelength observations of NGC 6251
Creators: name: Migliori, G.
name: Grandi, P.
name: Torresi, E.
name: Dermer, C.
name: Finke, J.
name: Celotti, A.
name: Mukherjee, R.
name: Errando, M.
name: Gargano, F.
name: Giordano, F.
name: Giroletti, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: NGC 6251 is a luminous radio galaxy ~104 Mpc away that was detected significantly with the Fermi Gamma-ray Space Telescope, and before that with EGRET (onboard the Compton Gamma-ray Observatory). Different observational constraints favor a nuclear origin for the gamma-ray emission. Here we present a study of the spectral energy distribution (SED) of the core of NGC 6251, and give results of modeling in the one-zone synchrotron/SSC framework. The SSC model provides a good description of the radio to gamma-ray emission but, as for other misaligned sources, predicts a lower Lorentz factor (Γ~2.4) than typically found when modeling blazars. If the blazar unification scenario is correct, this seems to point to the presence of at least two emitting regions in these objects, one with a higher and one with a lower Lorentz factor. The solution of a structured jet, with a fast moving spine surrounded by a slow layer, is explored and the consequences of the two models for the jet energetics and evolution are discussed.
description: 11 pages, 4 figures, accepted for publication in Astronomy & Astrophysics
A Simple Energy-Dependent Model for GRB Pulses with Interesting Physical Implications
Creators: name: Nemiroff, Robert J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A simple mathematical model for GRB pulses is postulated in both time and energy. The model breaks GRB pulses up into component functions, one general light curve function exclusively in the time dimension and four component functions exclusively in the energy dimension. Each component function of energy is effectively orthogonal to the other energy-component functions. The model is a good statistical fit to several of the most fluent separable GRB pulses known. Even without theoretical interpretation, the model may be immediately useful for fitting prompt emission from GRB pulses across energy channels with a minimal number of free parameters, sometimes far fewer than freshly fitting a GRB pulse in every energy band separately. Some theoretical implications of the model might be particularly interesting, however, as the temporal component (e.g. the shape of the light curve) is well characterized mathematically by the well known Planck distribution.
description: 4 pages, 2 figures; Gamma Ray Bursts 2010
PPLS: a privacy-preserving location-sharing scheme in mobile online social networks
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: privacy-preservation
location-sharing
mobile online social networks

description: © 2020, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. The recent proliferation of mobile devices has given rise to mobile online social networks (mOSNs), an emerging network paradigm that uses social networks as its main design element. As one of the most critical components in mOSNs, location sharing plays an important role in helping users share information and strengthen their social bonds, which however may compromise users’ privacy, including location information and social relationship details. To address these challenges, some solutions have been proposed. However, none of them considers the privacy of inter-user threshold distance, which effectively can be used to identify users, their friends, and location information, by malicious or undesired elements of the system. To overcome this limitation, we propose a secure distance comparison protocol. Furthermore, we present a privacy-preserving location-sharing scheme (PPLS), which allows users to build more complex access control policies. The safety of our scheme is validated by the security analysis and the experimental results demonstrate the efficiency of PPLS scheme.
Satellites around massive galaxies since z$\sim$2: confronting the Millennium simulation with observations
Creators: name: Quilis, Vicent
name: Trujillo, Ignacio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Minor merging has been postulated as the most likely evolutionary path to produce the increase in size and mass observed in the massive galaxies since z$\sim$2. In this Letter, we test directly this hypothesis comparing the population of satellites around massive galaxies in cosmological simulations versus the observations. We use state-of-the-art, publically available, Millennium I and II simulations and the associated semi-analytical galaxy catalogues to explore the time evolution of the fraction of massive galaxies that have satellites, the number of satellites per galaxy, the projected distance at which the satellite locate from the host galaxy, and the mass ratio between the host galaxies and their satellites. The three virtual galaxy catalogues considered here, overproduce the fraction of galaxies with satellites by a factor ranging between 1.5 and 6 depending on the epoch, whereas the mean projected distance and ratio of the satellite mass over host mass are in closer agreement with data. The larger pull of satellites in the semi-analytical samples could suggest that the size evolution found in previous hydrodynamical simulations is an artifact due to the larger number of infalling satellites compared to the real Universe. These results advise to revise the physical ingredients implemented in the semi-analytical models in order to reconcile the observed and computed fraction of galaxies with satellites, and eventually, it would leave some room to other mechanisms explaining the galaxy size growth not related to the minor merging.
description: Accepted for publication in ApJ Letters
Transnational faith : a Hong Kong church in Richmond, British Columbia
Creators: name: Tse, Justin Kin-Hung
Publisher: name: University of British Columbia
Year: 2009

description: This thesis examines the geographical imaginations of transnational Hongkonger Christians who are parishioners of a Chinese church known in this thesis as St. Matthew’s Church, in the Chinese ethnoburb, Richmond, British Columbia, in Metro Vancouver. Seeking to complement current arguments that immigrant religious congregations in North America serve as spaces of social services and identity formation, this study contextualizes St. Matthew’s Church at four scales in an effort to understand its geographical positioning at the personal, congregational, metropolitan, and transnational Hong Kong-Vancouver levels. The research question this thesis asks is: what global and local sites constitute the geographical imaginations of the parishioners who attend St. Matthew’s Church in Metro Vancouver? This research was conducted over 9 months between April and December 2008 at St. Matthew’s Church; its methodology included participant observation at religious services as well as 38 semi-structured interviews with 40 people. Based on this research, this thesis argues that transnational Hongkonger Christians at St. Matthew’s Church see Christian spaces as spaces of peace, an imagination developed in Hong Kong through British colonialism, Christian schools, and religious family practices. The mission of such Hongkonger Christians is to bring a territoriality of sacred peace through social conservatism to their trans-Pacific Hong Kong-Vancouver lifeworlds. Such a territoriality is challenged, however, by their own children growing up in a multicultural English-speaking Canadian society as well as by mainland Chinese migrants who are geopolitically different from Hongkongers. This thesis demonstrates that the Hongkonger imagined political and cultural geography is intertwined with its religious geography and that such a geography of religion pushes scholars of transnational Hongkongers and of sacred territorialities to understand the intersections between sacred space and political territory.
Proton decay
Creators: name: Ohlsson, Tommy
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Proton decay is a hypothetical form of particle decay in which protons are assumed to decay into lighter particles. This form of decay has yet to be detected. In this contribution to the proceedings of Neutrino 2022, we review the current status of proton decay, covering both experimental results and theoretical models, including their predictions.
description: 8 pages, 7 figures, REVTeX 4.2. Invited plenary talk presented at the XXXth International Conference on Neutrino Physics and Astrophysics (Neutrino 2022), (virtual) Seoul, Republic of Korea, June 4, 2022. Final version published in Nucl. Phys. B
Crosstalk between microRNA and oxidative stress in physiology and pathology
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: Humans
MicroRNAs
Oxidative Stress
Signal Transduction

description: MicroRNAs (miRNA), are short regulatory RNA molecules that regulate gene expression by binding specific sequences within target messenger RNA (mRNA) [...]
Shot noise thermometry of the quantum Hall edge states
Creators: name: Levkivskyi, Ivan P.
name: Sukhorukov, Eugene V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use the non-equilibrium bosonization technique to investigate effects of the Coulomb interaction on quantum Hall edge states at filing factor nu=2, partitioned by a quantum point contact (QPC). We find, that due to the integrability of charge dynamics, edge states evolve to a non-equilibrium stationary state with a number of specific features. In particular, the noise temperature of a weak backscattering current between edge channels is linear in voltage bias applied at the QPC, independently of the interaction strength. In addition, it is a non-analytical function of the QPC transparency T and scales as Tln(1/T) at T<< 1. Our predictions are confirmed by exact numerical calculations.
description: 5 pages, 3 figures