cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
From amplitudes to contact cosmological correlators
Creators: name: Bonifacio, James
name: Pajer, Enrico
name: Wang, Dong-Gang
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Regular Article - Theoretical Physics
Cosmology of Theories beyond the SM
Effective Field Theories

description: Abstract: Our understanding of quantum correlators in cosmological spacetimes, including those that we can observe in cosmological surveys, has improved qualitatively in the past few years. Now we know many constraints that these objects must satisfy as consequences of general physical principles, such as symmetries, unitarity and locality. Using this new understanding, we derive the most general scalar four-point correlator, i.e., the trispectrum, to all orders in derivatives for manifestly local contact interactions. To obtain this result we use techniques from commutative algebra to write down all possible scalar four-particle amplitudes without assuming invariance under Lorentz boosts. We then input these amplitudes into a contact reconstruction formula that generates a contact cosmological correlator in de Sitter spacetime from a contact scalar or graviton amplitude. We also show how the same procedure can be used to derive higher-point contact cosmological correlators. Our results further extend the reach of the boostless cosmological bootstrap and build a new connection between flat and curved spacetime physics.
Triggered star formation and Young Stellar Population in Bright-Rimmed Cloud SFO 38
Creators: name: Choudhury, Rumpa
name: Mookerjea, Bhaswati
name: Bhatt, H. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have investigated the young stellar population in and around SFO 38, one of the massive globules located in the northern part of the Galactic HII region IC 1396, using the Spitzer IRAC and MIPS observations (3.6 to 24 micron) and followed up with ground based optical photometric and spectroscopic observations. Based on the IRAC and MIPS colors and H-alpha emission we identify ~45 Young Stellar Objects (Classes 0/I/II) and 13 probable Pre Main Sequence candidates. We derive the spectral types (mostly K- and M-type stars), effective temperatures and individual extinction of the relatively bright and optically visible Class II objects. Based on optical photometry and theoretical isochrones, we estimate the spread in stellar ages to be between 1--8 Myr with a median age of 3 Myr and a mass distribution of 0.3--2.2 Msun with a median value around 0.5 Msun. Using the width of the H-alpha emission line measured at 10% peak intensity, we derive the mass accretion rates of individual objects to be between 10^{-10} to 10^{-8} Msun/yr. From the continuum-subtracted H-alpha line image, we find that the H-alpha emission of the globule is not spatially symmetric with respect to the O type ionizing star HD 206267. We clearly detect an enhanced concentration of YSOs closer to the southern rim of SFO~38 and identify an evolutionary sequence of YSOs from the rim to the dense core of the cloud, with most of the Class II objects located at the bright rim. The YSOs appear to be aligned along two different directions towards the O6.5V type star HD 206267 and the B0V type star HD 206773. This is consistent with the Radiation Driven Implosion (RDI) model for triggered star formation. (Abridged)
description: Accepted for publication in ApJ
Quantum Algorithms for Josephson Networks
Creators: name: Siewert, Jens
name: Fazio, Rosario
Publisher: name: Universität Regensburg
Year: 2001
Subjects: subject: 530 Physik

description: We analyze possible implementations of quantum algorithms in a system of (macroscopic) Josephson charge qubits. System layout and parameters to realize the Deutsch algorithm with up to three qubits are provided. Special attention is paid to the necessity of entangled states in the various implementations. Further, we demonstrate explicitly that the gates to implement the Bernstein-Vazirani algorithm can be realized by using a system of uncoupled qubits.
Wheels within wheels: Hamiltonian dynamics as a hierarchy of action variables
Creators: name: Perkins, Rory J.
name: Bellan, Paul M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In systems where one coordinate undergoes periodic oscillation, the net displacement in any other coordinate over a single period is shown to be given by differentiation of the action integral associated with the oscillating coordinate. This result is then used to demonstrate that the action integral acts as a Hamiltonian for slow coordinates providing time is scaled to the ``tick-time'' of the oscillating coordinate. Numerous examples, including charged particle drifts and relativistic motion, are supplied to illustrate the varied application of these results.
description: 7 pages, 3 figures
Modeling SN 1996cr's X-ray lines at high-resolution: Sleuthing the ejecta/CSM geometry
Creators: name: Dewey, Daniel
name: Bauer, Franz E.
name: Dwarkadas, Vikram V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: SN 1996cr, located in the Circinus Galaxy (3.7 Mpc, z ~ 0.001) was non-detected in X-rays at ~ 1000 days yet brightened to ~ 4 x 10^{39} erg/s (0.5-8 keV) after 10 years (Bauer et al. 2008). A 1-D hydrodynamic model of the ejecta-CSM interaction produces good agreement with the measured X-ray light curves and spectra at multiple epochs. We conclude that the progenitor of SN 1996cr could have been a massive star, M > 30 M_solar, which went from an RSG to a brief W-R phase before exploding within its ~ 0.04 pc wind-blown shell (Dwarkadas et al. 2010). Further analysis of the deep Chandra HETG observations allows line-shape fitting of a handful of bright Si and Fe lines in the spectrum. The line shapes are well fit by axisymmetric emission models with an axis orientation ~ 55 degrees to our line-of-sight. In the deep 2009 epoch the higher ionization Fe XXVI emission is constrained to high lattitudes: the Occam-est way to get the Fe H-like emission coming from high latitude/polar regions is to have more CSM at/around the poles than at mid and lower lattitudes, along with a symmetric ejecta explosion/distribution. Similar CSM/ejecta characterization may be possible for other SNe and, with higher-throughput X-ray observations, for gamma-ray burst remnants as well.
description: 4 pages, 5 figures. To appear in the Proceedings of the Gamma Ray Bursts 2010 Conference, Annapolis, USA. Editors: McEnery, Racusin, Gehrels
$L^\infty$ to $L^p$ constants for Riesz projections
Creators: name: Marzo, Jordi
name: Seip, Kristian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Functional Analysis (math.FA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 41A44, 42B05, 46E30

description: The norm of the Riesz projection from $L^\infty(\T^n)$ to $L^p(\T^n)$ is considered. It is shown that for $n=1$, the norm equals $1$ if and only if $p\le 4$ and that the norm behaves asymptotically as $p/(πe)$ when $p\to \infty$. The critical exponent $p_n$ is the supremum of those $p$ for which the norm equals $1$. It is proved that $2+2/(2^n-1)\le p_n <4$ for $n>1$; it is unknown whether the critical exponent for $n=\infty$ exceeds $2$.
“More precious than gold” : Indigenous water governance in the context of Modern land claims in Yukon
Creators: name: Wilson, Nicole J.
Publisher: name: University of British Columbia
Year: 2018

description: Water governance is a priority for Indigenous peoples, whose complex relationships to water are essential to material and cultural well-being. Indigenous water governance refers to Indigenous modes of interacting with and decision-making processes about water including ontologies, epistemologies, and forms of governance distinct to a given people and adapted over time. Indigenous peoples around the world are presently struggling to protect the waters within their territories against unprecedented changes occurring as a consequence of global environmental change and unsustainable resource development. This dissertation empirically investigates how Indigenous water governance is shaped by the Modern land claims in Yukon, Canada focusing on four of fourteen Yukon First Nations (Carcross/Tagish, Kluane, Tr’ondëk Hwëch’in and White River); the challenges of navigating complex water governance landscapes where historical and ongoing colonialism shape Indigenous water rights and access; Indigenous approaches to water governance as they are informed by specific water ontologies and forms of governance; and the novel approaches to water governance Indigenous peoples are engaging as informed by their relationships to water and strategic engagement with colonial water frameworks. Chapter 2 engages with the ontological politics of water and water governance. It examines how ontological politics inform water conflict between Indigenous and settler governments and the ways Indigenous views of water as a living entity might come to inform more just and sustainable alternatives. Chapter 3 contributes theory and empirics to the study of Indigenous-state water co-governance in Yukon through an examination of the benefits, challenges and future opportunities with the water governance system, shaped by Modern land claims. Chapter 4 engages with the unique opportunity for Yukon First Nations to develop water legislation and explores the implications of engaging “state-like” forms of governance for Indigenous water governance. Chapter 5 seeks to expand understandings of Indigenous peoples’ roles in Community-Based Monitoring from one of ‘knowledge input’ to an emergent water governance strategy engaged to protect the waters within their traditional territories.
Geology and stratigraphy of the Mexico Basin (Mexico City), central Trans-Mexican Volcanic Belt
Creators: name: Arce, José Luis
name: Layer, Paul W.
name: Macías, José Luis
name: Morales-Casique, Eric
name: García-Palomo, Armando
name: Jiménez-Domínguez, Fernando J.
name: Benowitz, Jeff
name: Vásquez-Serrano, Alberto
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: We present a new geological map of the Mexico Basin (Mexico City) based on field descriptions, a compilation of data from previous publications, and new 40Ar/39Ar geochronology data. The oldest rocks described in the Mexico Basin are Cretaceous limestones, overlaid by Oligocene (26.0 Ma) and Miocene (22.8–5.0 Ma) volcanic successions, followed by Pliocene-Pleistocene (3.7–1.2 Ma) to Recent volcanic rocks around the basin. The Mexico basin is surrounded by volcanic ranges mainly andesitic and dacitic in composition: Sierra de Guadalupe (∼20 to ∼13 Ma), Sierra de las Cruces (3.7–0.03 Ma), Sierra Nevada (1.4 Ma to Recent), and Sierra de Chichinautzin (1.2 Ma to Recent). The basin has formed and evolved through complex tectonic and volcanic events: A NNW and NNE-Cañón de Lobos trending reverse fault affected the Cretaceous basement, the NW-SE Mixhuca normal fault displaced Oligocene-Miocene volcanics, the NE-SW Tenochtitlan fault system displaced Plio-Pleistocene rocks, and finally E-W normal faults affected the most recent volcanic rocks, paleosols, and lacustrine sediments.
RFI mitigation with phase-only adaptive beamforming
Creators: name: Fridman, P. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Connected radio interferometers are sometimes used in the tied-array mode: signals from antenna elements are coherently added and the sum signal applied to a VLBI backend or pulsar processing machine. Usually there is no computer-controlled amplitude weighting in the existing radio interferometer facilities. Radio frequency interference (RFI) mitigation with phase-only adaptive beamforming is proposed for this mode of observation. Small phase perturbations are introduced in each of the antenna's signal. The values of these perturbations are optimized in such a way that the signal from a radio source of interest is preserved and RFI signals suppressed. An evolutionary programming algorithm is used for this task. Computer simulations, made for both one-dimensional and two-dimensional array set-ups, show considerable suppression of RFI and acceptable changes to the main array beam in the radio source direction.
description: 7 pages, 11 figures
Equilibration and relaxation times at the chiral phase transition including reheating
Creators: name: Nahrgang, Marlene
name: Leupold, Stefan
name: Bleicher, Marcus
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the relaxational dynamics of the order parameter of chiral symmetry breaking, the sigma mean-field, with a heat bath consisting of quarks and antiquarks. A semiclassical stochastic Langevin equation of motion is obtained from the linear sigma model with constituent quarks. The equilibration of the system is studied for a first order phase transition and a critical point, where a different behavior is found. At the first order phase transition we observe the phase coexistence and at a critical point the phenomenon of critical slowing down with large relaxation times. We go beyond existing Langevin studies and include reheating of the heat bath by determining the energy dissipation during the relaxational process. The energy of the entire system is conserved. In a critical point scenario we again observe critical slowing down.
Caputo q-Fractional Initial Value Problems and a q-Analogue Mittag-Leffler Function
Creators: name: Abdeljawad, Thabet
name: Baleanu, Dumitru
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Caputo q-fractional derivatives are introduced and studied. A Caputo -type q-fractional initial value problem is solved and its solution is expressed by means of a new introduced q-Mittag-Leffler function. Some open problems about q-fractional integrals are proposed as well.
Glacial geomorphology of the Chirripó National Park, Costa Rica
Creators: name: Quesada-Román, Adolfo
name: Ballesteros-Cánovas, Juan Antonio
name: Stoffel, Markus
name: Zamorano-Orozco, José Juan
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: Several regions of tropical America show imprints of past glacial activity. These relict landforms can support the understanding of past climate conditions, such as during the Last Glacial Maximum (LGM), and the implications that these paleoclimatic conditions could have had on landscape change. Here, we present and analyze glacial morphologies for the Chirripó National Park in Costa Rica based on aerial imagery (1:25,000), detailed Digital Elevation Models, geomorphic mapping, as well as geomorphic assessments in the field to determine and validate landforms. This study adds valuable insights into the reconstruction of the maximum expansion of tropical glaciation during the LGM in Costa Rica and into tropical America glacial landscapes in general.
Long-Range Connections in Transportation Networks
Creators: name: Viana, Matheus P.
name: Costa, Luciano da F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Since its recent introduction, the small-world effect has been identified in several important real-world systems. Frequently, it is a consequence of the existence of a few long-range connections, which dominate the original regular structure of the systems and implies each node to become accessible from other nodes after a small number of steps, typically of order $\ell \propto \log N$. However, this effect has been observed in pure-topological networks, where the nodes have no spatial coordinates. In this paper, we present an alalogue of small-world effect observed in real-world transportation networks, where the nodes are embeded in a hree-dimensional space. Using the multidimensional scaling method, we demonstrate how the addition of a few long-range connections can suubstantially reduce the travel time in transportation systems. Also, we investigated the importance of long-range connections when the systems are under an attack process. Our findings are illustrated for two real-world systems, namely the London urban network (streets and underground) and the US highways network enhanced by some of the main US airlines routes.
A combined approach for a modern hydrogeological mapping: the case study of Tennacola stream catchment (central Apennine, Italy)
Creators: name: Giacopetti, Marco
name: Materazzi, Marco
name: Pambianchi, Gilberto
name: Posavec, Kristijan
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: The current European water legislation, specifically the one addressed to groundwater for human consumption (EU Water Framework Directive, WFD-2000/60/EC), provides clear indications on the objectives and actions to be taken for the proper management and protection of water resources. In Italy, as well as in other countries of the EU, the implementation of this Directive, in the face of an adjustment of the legislation at national level, is still far behind, as regards the obligations on the part of local administrations. Among the reasons there is a lack of cognitive tools, adequate and, above all, univocally accepted by the scientific point of view. The hydrogeological mapping here presented, which covers an area of around 44 km2 and is edited at 1:10,000 scale, goes in this direction, combining different approaches and methodologies (field surveys, spring hydrograph analysis, surface flow measurements, numerical models …) to arrive at a complete and functional study of an aquifer exploited for drinking purposes.
Invariants of tangles with flat connections in their complements
Creators: name: Kashaev, R.
name: Reshetikhin, N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Let G be a simple complex algebraic group. By using a notion of a G-category we define invariants of tangles with flat G-connections in their complements. We also show that quantized universal enveloping algebras at roots of unity provide examples of G-categories.
description: 26 pages, 20 figures. Eight years old paper
Far-Ultraviolet Number Counts of Field Galaxies
Creators: name: Voyer, Elysse N.
name: Gardner, Jonathan P.
name: Teplitz, Harry I.
name: Siana, Brian D.
name: de Mello, Duilia F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The far-ultraviolet (FUV) number counts of galaxies constrain the evolution of the star-formation rate density of the universe. We report the FUV number counts computed from FUV imaging of several fields including the Hubble Ultra Deep Field, the Hubble Deep Field North, and small areas within the GOODS-North and -South fields. These data were obtained with the Hubble Space Telescope Solar Blind Channel of the Advance Camera for Surveys. The number counts sample a FUV AB magnitude range from 21-29 and cover a total area of 15.9 arcmin^2, ~4 times larger than the most recent HST FUV study. Our FUV counts intersect bright FUV GALEX counts at 22.5 mag and they show good agreement with recent semi-analytic models based on dark matter "merger trees" by Somerville et al. (2011). We show that the number counts are ~35% lower than in previous HST studies that use smaller areas. The differences between these studies are likely the result of cosmic variance; our new data cover more lines of sight and more area than previous HST FUV studies. The integrated light from field galaxies is found to contribute between 65.9 +/-8 - 82.6 +/-12 photons/s/cm^2/sr/angstrom to the FUV extragalactic background. These measurements set a lower limit for the total FUV background light.
description: Accepted for publication in ApJ, including 34 pages, 6 figures, and 2 tables
“CHANGES IN DAIRY CONSUMPTION PATTERNS AND THEIR ASSOCIATED CHARACTERISTICS AMONG MEXICAN ADULTS: ANALYSIS OF THREE NATIONALLY REPRESENTATIVE SURVEYS 2012-2018”
Creators: name: Armenta González, Leticia
name: Hernández-Pérez, Jesús Gibran
name: Rodríguez-Ramírez, Sonia
name: Feeney, Emma
name: Vazquez, Argelia
name: Torres, Luisa
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 420208
subject: Nutritional epidemiology

description: Supplementary materials“CHANGES IN DAIRY CONSUMPTION PATTERNS AND THEIR ASSOCIATED CHARACTERISTICS AMONG MEXICAN ADULTS: ANALYSIS OF THREE NATIONALLY REPRESENTATIVE SURVEYS 2012-2018”Authors: Leticia Lizbeth Armenta-González1, Jesús Gibran Hernández-Pérez2,3, Sonia Rodríguez-Ramírez1, Emma L. Feeney4, Ruth Argelia Vázquez-Salas3, Luisa Torres-Sánchez31Centro de Investigación en Nutrición y Salud. Instituto Nacional de Salud Pública, México. LLAG: leticializbethag@gmail.com; ORCID: 0000-0002-8939-3650, SRR: scrodrig@insp.mx; ORCID: 0000-0002-5439-4389.2Centro de Investigación en Salud Poblacional. Instituto Nacional de Salud Pública, México. JGHP: nut.jgibran@hotmail.com; ORCID: 0000-0002-7637-4127, RAVS: argelia.vazquez@insp.mx; ORCID: 0000-0002-9333-1671, LETS: ltorress@insp.mx; ORCID: 0000-0002-2902-98813Escuela de Salud Pública de México4UCD Institute of Food and Health, Science Centre South, University College Dublin, Ireland. ELF: emma.feeney@ucd.ie; ORCID: 0000-0003-3234-6340Corresponding author: Dr. Luisa Torres-Sánchez. Instituto Nacional de Salud Pública. Av. Universidad 655, Col. Sta. María Ahuacatitlán, C.P. 62100. Cuernavaca, Morelos. Email: ltorress@insp.mx. Phone: 777-3293000, ext. 3454.
ContentsSupplementary Table I. Proportion of dairy consumers in adults ≥ 20 years. ENSANUT 2012, 2016 and 2018.3Supplementary table 2. The adjusted average score of dairy consumption patterns by survey year in Mexican adults. ENSANUT 2012, 2016 and 2018.4
Maximally Star-Forming Galactic Disks I. Starburst Regulation Via Feedback-Driven Turbulence
Creators: name: Ostriker, Eve C.
name: Shetty, Rahul
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Star formation rates in the centers of disk galaxies often vastly exceed those at larger radii. We investigate the idea that these central starbursts are self-regulated, with the momentum flux injected to the ISM by star formation balancing the gravitational force confining the gas. For most starbursts, supernovae are the largest contributor to the momentum flux, and turbulence provides the main pressure support for the predominantly-molecular ISM. If the momentum feedback per stellar mass formed is p_*/m_* ~ 3000 km/s, the predicted star formation rate is Sigma_SFR=2 pi G Sigma^2 m_*/p_* ~0.1(Sigma/100Msun/pc^2)^2 Msun/kpc^2/yr in regions where gas dominates the vertical gravity. We compare this prediction with numerical simulations of vertically-resolved disks that model star formation including feedback, finding good agreement for gas surface densities Sigma ~ 10^2-10^3 Msun/pc^2. We also compare to a compilation of star formation rates and gas contents from local and high-redshift galaxies (both mergers and normal galaxies), finding good agreement provided that X_CO decreases weakly as Sigma and Sigma_SFR increase. Star formation rates in dense, turbulent gas are also expected to depend on the gravitational free-fall time; if the efficiency per free-fall time is epsilon_ff ~ 0.01, the turbulent velocity dispersion driven by feedback is expected to be v_z = 0.4 epsilon_ff p_*/m_* ~ 10 km/s, relatively independent of Sigma or Sigma_SFR. Turbulence-regulated starbursts (controlled by kinetic momentum feedback) are part of the larger scheme of self-regulation; primarily-atomic low-Sigma outer disks may have star formation regulated by UV heating feedback, whereas regions at extremely high Sigma may be regulated by feedback of radiation that is reprocessed into trapped IR.
description: 35 pages, 5 figures; accepted by the ApJ
Tol 2240-384 - a new low-metallicity AGN candidate
Creators: name: Izotov, Y. I.
name: Guseva, N. G.
name: Fricke, K. J.
name: Stasinska, G.
name: Henkel, C.
name: Papaderos, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Active galactic nuclei (AGNs) have typically been discovered in massive galaxies of high metallicity. We attempt to increase the number of AGN candidates in low metallicity galaxies. We present VLT/UVES and archival VLT/FORS1 spectroscopic and NTT/SUSI2 photometric observations of the low-metallicity emission-line galaxy Tol 2240-384 and perform a detailed study of its morphology, chemical composition, and emission-line profiles. We determine abundances of nitrogen, O, Ne, S, Cl, Ar, and Fe by analyzing the fluxes of narrow components of the emission lines using empirical methods. We verify with a photoionisation model that the physics of the narrow-line component gas is similar to that in common metal-poor galaxies. Image deconvolution reveals two high-surface brightness regions in Tol 2240-384 separated by 2.4 kpc.The brightest southwestern region is surrounded by intense ionised gas emission on a spatial scale of ~5 kpc. The profiles of the strong emission lines in the UVES spectrum are asymmetric and all these lines apart from Halpha and Hbeta can be fitted by two Gaussians of FWHM ~75-92 km/s separated by ~80 km/s implying that there are two regions of ionised gas emitting narrow lines. The shapes of the Halpha and Hbeta lines are more complex. In particular, the Halpha emission line consists of two broad components of FWHM ~700 km/s and 2300 km/s, in addition to narrow components of two regions revealed from profiles of other lines. The extraordinarily high luminosity of the broad Halpha line of 3x10e41 erg/s cannot be accounted for by massive stars at different stages of their evolution. The broad Halpha emission persists over a period of 7 years, which excludes supernovae as a powering mechanism of this emission. This emission most likely arises from an accretion disc around a black hole of mass ~10e7 Msun.
description: 15 pages, 8 figures, accepted for publication in Astronomy and Astrophysics
Geomorphology of the Ubiñas Massif, Cantabrian Mountains, NW Spain (1:22,000)
Creators: name: Alonso, Victoria
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Computational Biology

description: A Geomorphological Map of the Ubiñas Massif, Cantabrian Mountains, at a scale 1:22,000 and covering 94.52 km2, is presented. The ‘Natural Park of Las Ubiñas-La Mesa’, a completely deglaciated glaciokarst, containing the highest peaks in this part of the Cantabrian Mountains, has been also declared ‘Biosphere Reserve’ by UNESCO. A previous geomorphological map (13.17 km2), recording glacial and periglacial, karst, slope, fluvial and anthropic features, is now enlarged to include the whole massif. An initial analysis of the present map, planned as a basic instrument to fulfil the needs of no particular end-users, provides information about rock avalanches during glaciation, preglacial deposits, and the absence of rock glaciers formed by calcareous debris, among other characteristics of the area. This cartography, considered as a fundamental base for environmental management, could be employed as a basis document to obtain other geomorphological derived maps.
Forest residues to energy : local air quality, health risks and greenhouse gas emissions
Creators: name: Petrov, Olga
Publisher: name: University of British Columbia
Year: 2018

description: Local impact assessment of biomass-based district energy systems (DES) is still in its infancy. There has been a lack of appropriate assessment methods for parameters with broad variability on local scale, and lack of DES impact assessments. This study investigates how would: 1) the inclusion of site-specific terrain, land use and microclimatic characteristics, variable population density and breathing rates affect accuracy of assessments on local air quality and health; 2) an incremental increase of PM₂.₅, NOx and CO concentrations from DES contribute to ambient air quality and population exposure, 3) life-cycle GHG emissions from DES contribute to global warming, and 4) the introduction of biomass affect economics of DES compared to the fossil fuel-based DES. Utilizing dispersion modeling the study established an assessment approach which confirmed the need for inclusion of population dynamics, site-specific microclimatic characteristics, and diurnal circulation patterns. Otherwise, health risks could potentially be underestimated by more than 20%. Applying this approach on a small-scale biomass gasification plant (BRDF), the study concluded that the health impact was the highest for NO₂ (677 DALY) when all energy was produced by biomass, and for PM₂.₅ (64 DALY) if all energy was produced by natural gas. Complete replacement of Power House (PH) by one biomass plant can result in almost 28% higher impact compared to 513 DALY when both BRDF and PH are operational. NO₂ emissions from the BRDF exceeded the air quality objectives (BCAQO) in all seasons except during summer. Although overall incremental contribution of PM₂.₅ is at least one order of magnitude lower than BCAQO, the maximum PM₂.₅ emissions from the PH could adversely add to the already high background concentrations. Meeting energy demand solely by an expanded full-scale BRDF from locally supplied biomass reduces GHG annually to 3.81E+06 kg CO₂eq from 7.08E+07 kg CO₂eq when energy was produced solely by the current PH. An introduction of biomass increased total costs by $19 M compared to existing PH, but saved $8.4 M in carbon tax over plants’ lifetime. $3.3 M of societal damages could be avoided over plants’ lifetime in case of combined use of natural gas and biomass.
Higgs Multiplets of the Quark-Lepton Family Group
Creators: name: Ajaib, M. A.
name: Barr, S. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is shown that realistic models can be constructed in which the Standard Model Higgs field is in a non-trivial multiplet of a non-abelian family group of the quarks and leptons. It is shown that the observed quark and lepton masses and mixing angles can be fit, while the coefficients of flavor-changing four-fermion operators mediated by the extra Higgs doublets are determined in terms of only a few unknown parameters.
Portrait of Capt. Sineus Edwards
Creators: name: Springs Historical Society
Publisher: name: Unknown
Year: 0
Subjects: East Hampton
Springs
Edwards Family
Photographs
Portraits
Ship captains

description: This is a portrait of Captain Sineus Edwards (1812-1896). Sineus Edwards brought the bell for the Springs Community Church on his sloop, the Maria D, from Albany.
description: This material was lent to the Long Island Collection by the Springs Historical Society Library for digitization purposes.
Land Capability for Agriculture, Hermel District, Lebanon
Creators: name: Abou-Najem, Sandra
name: Palacios-Rodríguez, Guillermo
name: Darwish, Talal
name: Faour, Ghaleb
name: Kattar, Salim
name: Rumbao, Inmaculada Clavero
name: Navarro-Cerrillo, Rafael Mª
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Computational Biology

description: For the purpose of mapping land capability by United States Department of Agriculture (USDA) criteria, this paper presents a validated model to map land capability at a scale of 1:20,000 using a digital elevation model and the available soil information for Hermel District (525.6 km2) in Lebanon. The model was validated through fieldwork and it indicates a good overall accuracy of 89% and the significance of the model for mapping land capability at a district level. The study shows that 11.5 km2 (2.2%), 284.6 km2 (54.2%), 66.8 km2 (12.7%), 147.9 km2 (28.1%) and 14.9 km2 (2.8%) of the region were categorized in I, II, III, IV, and V land classes respectively. The comparison between the zoning map already produced for Hermel city and the land capability map demonstrates that the land use patterns need to be modified according to identified land capability classes to sustain the remaining productive lands for future generations.
ITO Presentation Slides for Schema.org Crosswalk Presentation to Polar to Global Data Interoperability 3rd Hackathon
Creators: name: Verhey, Chantelle
Publisher: name: Zenodo
Year: 2022
Subjects: Polar
Presentation
Schema.org
Crosswalks
Hackathon
Interoperability

description: This presentation was part of Global to Polar Data Interoperability's Third Hackathon (November 4th, 2020). The presentation included socializing the outputs from the Research Data Alliance - Research Metadata Schemas Working Group. Specifically the presentation slides highlight the schema to schema.org mappings/crosswalks and accompanying visualizations created by the International Technology Office. The targeted audience was data managers within the Polar research data management community, to discuss schema.org vocabulary's advantages, disadvantages and pathways towards semantic syndication.
description: World Data System - International Technology Office Funded under the Digital Research Alliance of Canada (formerly the Canadian New Digital Research Infrastructure Organization - NDRIO) collaborative agreement number 51387-50326
Complete Chaotic Mixing in an Electro-osmotic Flow by Destabilization of Key Periodic Pathlines
Creators: name: Chabreyrie, R.
name: Chandre, C.
name: Singh, P.
name: Aubry, N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The ability to generate complete, or almost complete, chaotic mixing is of great interest in numerous applications, particularly for microfluidics. For this purpose, we propose a strategy that allows us to quickly target the parameter values at which complete mixing occurs. The technique is applied to a time periodic, two-dimensional electro-osmotic flow with spatially and temporally varying Helmoltz-Smoluchowski slip boundary conditions. The strategy consists of following the linear stability of some key periodic pathlines in parameter space (i.e., amplitude and frequency of the forcing), particularly through the bifurcation points at which such pathlines become unstable.
description: 14 pages, 11 figures
Ultra-bright and efficient single photon generation based on N-V centres in nanodiamonds on a solid immersion lens
Creators: name: Schröder, Tim
name: Gädeke, Friedemann
name: Banholzer, Moritz Julian
name: Benson, Oliver
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Single photons are fundamental elements for quantum information technologies such as quantum cryptography, quantum information storage and optical quantum computing. Colour centres in diamond have proven to be stable single photon sources and thus essential components for reliable and integrated quantum information technology. A key requirement for such applications is a large photon flux and a high efficiency. Paying tribute to various attempts to maximise the single photon flux we show that collection efficiencies of photons from colour centres can be increased with a rather simple experimental setup. To do so we spin-coated nanodiamonds containing single nitrogen-vacancy colour centres on the flat surface of a ZrO2 solid immersion lens. We found stable single photon count rates of up to 853 kcts/s at saturation under continuous wave excitation while having excess to more than 100 defect centres with count rates from 400 kcts/s to 500 kcts/s. For a blinking defect centre we found count rates up to 2.4 Mcts/s for time intervals of several ten seconds. It seems to be a general feature that very high rates are accompanied by a blinking behaviour. The overall collection efficiency of our setup of up to 4.2% is the highest yet reported for N-V defect centres in diamond. Under pulsed excitation of a stable emitter of 10 MHz, 2.2% of all pulses caused a click on the detector adding to 221 kcts/s thus opening the way towards diamond based on-demand single photon sources for quantum applications.
Geomorphological processes, forms and features in the surroundings of the Melka Kunture Palaeolithic site, Ethiopia
Creators: name: Maerker, Michael
name: Schillaci, Calogero
name: Melis, Rita T.
name: Kropáček, Jan
name: Bosino, Alberto
name: Vilímek, Vít
name: Hochschild, Volker
name: Sommer, Christian
name: Altamura, Flavio
name: Mussi, Margherita
Publisher: name: Taylor & Francis
Year: 2019
Subjects: 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: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy

description: The landscape of the surroundings of the Melka Kunture prehistoric site, Upper Awash Basin, Ethiopia, were studied intensively in the last decades. Nonetheless, the area was mainly characterized under a stratigraphic/geological and archaeological point of view. However, a detailed geomorphological map is still lacking. Hence, in this study, we identify, map and visualize geomorphological forms and processes. The morphology of the forms, as well as the related processes, were remotely sensed with available high-resolution airborne and satellite sources and calibrated and validated through extensive field work conducted in 2013 and 2014. Furthermore, we integrated multispectral satellite imagery to classify areas affected by intensive erosion processes and/or anthropic activities. The Main Map at 1:15,000 scale reveals structural landforms as well as intensive water-related degradation processes in the Upper Awash Basin. Moreover, the map is available as an interactive WebGIS application providing further information and detail (www.roceeh.net/ethiopia_geomorphological_map/).
EUV lines observed with EIS/Hinode in a solar prominence
Creators: name: Labrosse, Nicolas
name: Schmieder, Brigitte
name: Heinzel, Petr
name: Watanabe, Tetsuya
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We report on observations of a solar prominence obtained on 26 April 2007 using the Extreme Ultraviolet Imaging Spectrometer on Hinode. Several regions within the prominence are identified for further analysis. Selected profiles for lines with formation temperatures between log(T)=4.7-6.3, as well as their integrated intensities, are given. The line profiles are discussed. We pay special attention to the He II line which is blended with coronal lines. Our analysis confirms that depression in EUV lines can be interpreted by two mechanisms: absorption of coronal radiation by the hydrogen and neutral helium resonance continua, and emissivity blocking. We present estimates of the He II line integrated intensity in different parts of the prominence according to different scenarios for the relative contribution of absorption and emissivity blocking on the coronal lines blended with the He II line. We estimate the contribution of the He II 256.32 line in the He II raster image to vary between ~44% and 70% of the raster's total intensity in the prominence according to the different models used to take into account the blending coronal lines. The inferred integrated intensities of the He II line are consistent with theoretical intensities obtained with previous 1D non-LTE radiative transfer calculations, yielding a preliminary estimate for the central temperature of 8700 K, central pressure of 0.33 dyn/cm^2, and column mass of 2.5 10^{-4} g/cm^2. The corresponding theoretical hydrogen column density (10^{20} cm^{-2}) is about two orders of magnitude higher than those inferred from the opacity estimates at 195 Å. The non-LTE calculations indicate that the He II 256.32 Å line is essentially formed in the prominence-to-corona transition region by resonant scattering of the incident radiation.
description: 13 pages, 9 figures and one movie (available at http://www.astro.gla.ac.uk/users/labrosse/movies/sot-26Apr07-3.mpg)
Segmentifier : interactively refining clickstream data into actionable segments
Creators: name: Dextras-Romagnino, Kimberly
Publisher: name: University of British Columbia
Year: 2018

description: Clickstream data has the potential to provide actionable insights into e-commerce consumer behavior, but previous techniques fall short of handling the scale and complexity of real-world datasets. We present Segmentifier, a novel visual analytics interface that supports an iterative process of refining collections of action sequences into meaningful segments that are suitable for downstream analysis with techniques that require relatively small and clean input. We also present task and data abstractions for the application domain of clickstream data analysis, leading to a framework that abstracts the segment analysis process in terms of six functions: view, refine, record, export, abandon, and conclude. The Segmentifier interface is simple to use for analysts operating under tight time constraints. It supports filtering and partitioning through visual queries for both quantitative attributes and custom sequences of events, which are aggregated according to a three-level hierarchy. It features a rich set of views that show the underlying raw sequence details and the derived data of segment attributes, and a detailed glyph-based visual history of the automatically recorded analysis process showing the provenance of each segment in terms of an analysis path of attribute constraints. We demonstrate the effectiveness of our approach through a usage scenario with real-world data and a case study documenting the insights gained by an e-commerce analyst.
How to Use Research Data Alliance Crosswalks to Recommend Schema.org Markup in Metadata
Creators: name: Payne, Karen
name: Verhey, Chantelle
Publisher: name: Zenodo
Year: 2022
Subjects: Schema.org
Crosswalk
Research Data Alliance
Metadata
Schema
Repository
Visualizations
How-to
Standards

description: One of the outputs from the Research Data Alliance - Research Metadata Schemas Working Group was a set of crosswalks between Schema.org(SDO) terms and properties used in metadata schemas. This simple set of crosswalks was used to create a suite of visualizations that allow data managers to investigate how their colleagues have included SDO in their metadata landing pages. This document explores one way to use the existing set of crosswalks and visualizations to provide a preliminary set of recommendations for SDO markup for metadata. In this example, we are using a metadata sample obtained in October 2020 from the Socioeconomic Data and Applications Center within the Center for International Earth Science Information Network (SEDAC - CIESIN) at Columbia University.
description: World Data System - International Technology Office Funded under the Digital Research Alliance of Canada (formerly the Canadian New Digital Research Infrastructure Organization - NDRIO) collaborative agreement number 51387-50326
FoldSketch : enriching garments with physically reproducible folds
Creators: name: Li, Minchen
Publisher: name: University of British Columbia
Year: 2018

description: While folds and pleats add interest to garments and cloth objects, incorporating them into an existing design manually or using existing software requires expertise and time. This thesis presents FoldSketch, a new system that supports simple and intuitive fold and pleat design. FoldSketch users specify the fold or pleat configuration they seek using a simple schematic sketching interface; the system then algorithmically generates both the fold-enhanced 3D garment geometry that conforms to user specifications, and the corresponding 2D patterns that reproduce this geometry within a simulation engine. While previous work aspired to compute the desired patterns for a given target 3D garment geometry, the main algorithmic challenge here is that the target geometry is missing. Real-life garment folds have complex profile shapes, and their exact geometry and location on a garment are intricately linked to a range of physical factors; it is therefore virtually impossible to predict the 3D shape of a fold-enhanced garment using purely geometric means. At the same time, using physical simulation to model folds requires appropriate 2D patterns and initial drape, neither of which can be easily provided by the user. FoldSketch obtains both the 3D fold-enhanced garment and its corresponding patterns and initial drape via an alternating 2D-3D algorithm. We first expand the input patterns by allocating excess material for the expected fold formation; then we use these patterns to produce an estimated fold-enhanced target drape geometry that balances designer expectations against physical reproducibility. Next, we generate an initial reproducible output using the expanded patterns and the estimated target drape as input to a garment simulation engine. Then we improve the output's alignment with designer expectations by progressively refining the patterns and the estimated target drape, converging to a final fully physically reproducible fold-enhanced garment. The experiments confirm that FoldSketch reliably converges to a desired garment geometry and corresponding patterns and drape, and works well with different physical simulators. My collaborators and I demonstrate the versatility of this approach by showcasing a collection of garments augmented with diverse fold and pleat layouts specified via the FoldSketch interface, and further validate this approach via feedback from potential users.