cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On magnetic field generation in Kolmogorov turbulence
Creators: name: Boldyrev, Stanislav
name: Cattaneo, Fausto
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We analyze the initial, kinematic stage of magnetic field evolution in an isotropic and homogeneous turbulent conducting fluid with a rough velocity field, v(l) ~ l^alpha, alpha<1. We propose that in the limit of small magnetic Prandtl number, i.e. when ohmic resistivity is much larger than viscosity, the smaller the roughness exponent, alpha, the larger the magnetic Reynolds number that is needed to excite magnetic fluctuations. This implies that numerical or experimental investigations of magnetohydrodynamic turbulence with small Prandtl numbers need to achieve extremely high resolution in order to describe magnetic phenomena adequately.
description: 4 pages, revised, new material added
Electromagnetically-induced transparency and light storing of a pair of pulses
Creators: name: Raczynski, A.
name: Zaremba, J.
name: Zielinska-Kaniasty, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electromagnetically-induced transparency and light storing are studied in the case of a medium of atoms in a double Lambda configuration, both in terms of dark- and bright-state polatitons and atomic susceptibility. It is proven that the medium can be made transparent simultaneously for two pulses following their self-adjusting so that a condition for an adiabatic evolution has become fulfilled. Analytic formulas are given for the shapes and phases of the transmitted/stored pulses. The level of transparency can be regulated by adjusting the heights and phases of the control fields.
description: text +6 figures
GA-NIFS: A galaxy-wide outflow in a Compton-thick mini-BAL quasar at z = 3.5 probed in emission and absorption
Creators: name: Perna, Michele
name: Arribas, Santiago
name: Ji, Xihan
name: Marconcini, Cosimo
name: Lamperti, Isabella
name: Bertola, Elena
name: Circosta, Chiara
name: D'Eugenio, Francesco
name: Übler, Hannah
name: Böker, Torsten
name: Maiolino, Roberto
name: Bunker, Andrew J.
name: Carniani, Stefano
name: Charlot, Stéphane
name: Willott, Chris J.
name: Cresci, Giovanni
name: Parlanti, Eleonora
name: Del Pino, Bruno Rodríguez
name: Scholtz, Jan
name: Venturi, Giacomo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Studying the distribution and properties of ionised gas in outflows driven by AGN is crucial for understanding the feedback mechanisms at play in extragalactic environments. In this study, we explore the connection between ionised outflows traced by rest-frame UV absorption and optical emission lines in GS133, a Compton thick AGN at z = 3.47. We combine observations from the JWST NIRSpec Integral Field Spectrograph (IFS) with archival VLT VIMOS long-slit spectroscopic data, as part of the GA-NIFS project. We perform a multi-component kinematic decomposition of the UV and optical line profiles to derive the physical properties of the absorbing and emitting gas in GS133. Our kinematic decomposition reveals two distinct components in the optical lines. The first component likely traces a rotating disk with a dynamical mass of 2e10 Msun. The second component corresponds to a galaxy-wide, bi-conical outflow, with a velocity of 1000 km/s and an extension of 3 kpc. The UV absorption lines show two outflow components, with bulk velocities v_out = -900 km/s and -1900 km/s, respectively. This characterises GS133 as a mini-BAL system. Balmer absorption lines with similar velocities are tentatively detected in the NIRSpec spectrum. Both photoionisation models and outflow energetics suggest that the ejected absorbing gas is located at 1-10 kpc from the AGN. We use 3D gas kinematic modelling to infer the orientation of the [O III] bi-conical outflow, and find that a portion of the emitting gas resides along our line of sight, suggesting that [O III] and absorbing gas clouds are partially mixed in the outflow. The derived mass-loading factor (i.e. the mass outflow rate divided by the SFR) of 1-10, and the kinetic coupling efficiency (i.e. the kinetic power divided by LAGN) of 0.1-1% per cent suggest that the outflow in GS133 provides significant feedback on galactic scales.
description: 18 pages, 13 figures, submitted to Astronomy & Astrophysics. Comments are welcome
IMPACT OF SOCIAL MEDIA MARKETING IN THE BUYING INTENTION OF FASHION PRODUCTS
Creators: name: Dr. V. SURESH
name: M. VIDHYA
Publisher: name: Zenodo
Year: 2024
Subjects: Fashionable, Fashion Industry, Time, Social Media, Buying Intention.

description: Abstract

People in the twenty-first century do not have the time to visit and engage with one another. Through social media, users may join to social networking sites and stay in touch even when they are far away. In addition, social media platforms like Facebook foster a devoted relationship between the fashionable product and the consumer also helps in influencing customers for buying motive, opening up significant advertising prospects. Similar to this, other social media platforms, such as blogs, offer a place for people to comment on events that require publicising and can be used as a marketing tool for both customer adoption and promotions of fashion industry. People are now finding your social media page for buying by following and subscribing to fashionable pages and blogs. Since there is a lag between the time a social event occurs and when it is transmitted, these media have an advantage over other widely used public media, such as television. This study focuses on the tactics that can expand the current viral marketing model outside the realm of traditional social media. Consequently, it can aid in forging a strong enough community to support initiative buying and efficient marketing.
Stability of Texture Zeros under Radiative Corrections in See-Saw Models
Creators: name: Hagedorn, Claudia
name: Kersten, Joern
name: Lindner, Manfred
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has been shown that only certain neutrino mass matrices with texture zeros are compatible with existing data. We discuss the stability of phenomenological consequences of texture zeros under radiative corrections in the type-I see-saw scenario. We show that under certain conditions additional patterns are allowed due to these effects.
description: 14 pages, 6 EPS figures; references updated
Chairman Mao and [Dr. Norman] Bethune (oil-painting) (毛主席和白求恩 (油画))
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Mao, Zedong, 1893-1976
valueUri: http://id.worldcat.org/fast/28307
subject: Mao
subject: Bethune

description: Oil-painting of Mao's only meeting with the Canadian doctor in Yan'an. Date and artist information not provided. See also: Chairman Mao meets Comrade Bethune. Date, publication, and artist information not provided.
Mechanism of the Resonant Enhancement of Electron Drift in Nanometre Semiconductor Superlattices Subjected to Electric and Inclined Magnetic Fields
Creators: name: Soskin, Stanislav M.
name: Khovanov, Igor A.
name: McClintock, Peter V. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We address the increase of electron drift velocity that arises in semiconductor superlattices (SLs) subjected to constant electric and magnetic fields. It occurs if the magnetic field possesses nonzero components both along and perpendicular to the SL axis and the Bloch oscillations along the SL axis become resonant with cyclotron rotation in the transverse plane. It is a phenomenon of considerable interest, so that it is important to understand the underlying mechanism. In an earlier Letter (Phys. Rev. Lett. 114, 166802 (2015)) we showed that, contrary to a general belief that drift enhancement occurs through chaotic diffusion along a stochastic web (SW) within semiclassical collisionless dynamics, the phenomenon actually arises through a non-chaotic mechanism. In fact, any chaos that occurs tends to reduce the drift. We now provide fuller details, elucidating the mechanism in physical terms, and extending the investigation. In particular, we: (i) demonstrate that pronounced drift enhancement can still occur even in the complete absence of an SW; (ii) show that, where an SW does exist and its characteristic slow dynamics comes into play, it suppresses the drift enhancement even before strong chaos is manifested; (iii) generalize our theory for non-small temperature, showing that heating does not affect the enhancement mechanism and accounting for some earlier numerical observations; (iv) demonstrate that certain analytic results reported previously are incorrect; (v) provide an extended critical review of the subject and closely related issues; and (vi) discuss some challenging problems for the future.
description: 28 pages (including a detailed Contents, for convenience), 12 figures (some of them use postscript files of a reduced size: figures by the full-size files can be seen in the journal version)
Nonlinear internal waves breaking in stellar radiation zones. Parametrisation for the transport of angular momentum: bridging geophysical to stellar fluid dynamics
Creators: name: Mathis, Stéphane
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Internal gravity waves (hereafter IGWs) are one of the mechanisms that can play a key role to redistribute efficiently angular momentum in stars along their evolution. The study of IGWs is thus of major importance since space-based asteroseismology reveals a transport of angular momentum in stars, which is stronger by two orders of magnitude than the one predicted by stellar models ignoring their action or those of magnetic fields. IGWs trigger angular momentum transport when they are damped by heat or viscous diffusion, when they meet a critical layer or when they break. Theoretical prescriptions have been derived for the transport of angular momentum induced by IGWs because of their radiative and viscous dampings and of the critical layers they encounter along their propagation. However, none has been proposed for the transport triggered by their nonlinear breaking. In this work, we aim to derive such a physical and robust prescription, which can be implemented in stellar structure and evolution codes. We adapt an analytical saturation model, which has been developed for IGWs nonlinear convective breaking in the Earth atmosphere and has been successfully compared to in-situ measurements in the stratosphere, to the case of deep spherical stellar interiors. In a first step, we neglect the modification of IGWs by the Coriolis acceleration and the Lorentz force, which are discussed and taken into account in a second step. We derive a complete semi-analytical prescription for the transport of angular momentum by IGWs, which takes into account both their radiative damping and their potential nonlinear breaking because of their convective and vertical shear instabilities. This allows us to bring the physical prescription for the interactions between IGWs and the differential rotation to the same level of realism that the one used in global circulation models for the atmosphere.
description: 9 pages, 1 figure, accepted for publication in Astronomy & Astrophysics
Foreign Ownership of U.S. Agricultural Land Through December 31, 1991: County-Level Data
Creators: name: Butler, Gertrude S.
name: DeBraal, J. Peter
name: Butler, Gertrude S.
name: DeBraal, J. Peter
Publisher: name: Unknown
Year: 1992
Subjects: subject: Agricultural and Food Policy
subject: Land Economics/Use
subject: Agricultural land
subject: foreign investment
subject: foreign landownership
subject: county data

description: Foreign investment in U.S. agricultural land has been reported for 14.8 million acres in 1,918 of the 3,041 counties in the United States. Data are presented for each county to show the number of acres and parcels, value, country of origin, and use of foreign-owned agricultural land. Aggregation of the data at the county level supplements "Foreign Ownership of U.S. Agricultural Land Through December 31, 1991," Staff Report No. AGES 9211.
A Workflow for Increasing the Quality of Scientific Software
Creators: name: Maric, Tomislav
name: Lehr, Jan-Patrick
name: Papagiannidis, Ioannis
name: Lambie, Benjamin
name: Bothe, Dieter
name: Bischof, Christian
Publisher: name: Zenodo
Year: 2021
Subjects: scientific software
software quality
reproducibility of results
sustainable research software

description: The proposed workflow increases the quality of research software in Computational Science and Engineering (CSE) by applying established software engineering practices extended with CSE-specific testing, visualization, and periodical cross-linking of scientific software, reports/publications, and datasets.
Muffle atmosphere promoted fabrication of graphene oxide nanoparticle by agricultural waste
Creators: name: Hashmi, Ayesha
name: Ajaya K. Singh
name: Bhawana Jain
name: Ambrish Singh
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology

description: Graphene is a radiant star in the field of nanomaterials. It has gained prominent interest since of its very good mechanical, thermal, optical and electronic possessions. The basic chemical reaction elaborate in the Hummer’s method was the oxidation of graphite, during which harmful toxic gases used to emit. Nowadays green chemistry is blossoming in the field of nanomaterial. In present work, we fabricate graphene oxide (GO) through different agricultural wastes i.e., Rice bran (RB), Sugarcane bagasse (SB), Orange peel (OP), and mixture of all these three wastes i.e., tricomposite agro waste (TAW) were mixed with ferrocene which gave electron transfer reaction to synthesized GO and compared it. At last, we concluded that particle size obtained for OPGO (23.99 nm) > graphite (17.17 nm) > SBGO (15.5 nm) > RBGO (2.235 nm) > TAWGO (1.77 nm). These green strategies are biocompatible and cost effective too. Basic information of GO crystal was obtained by X-ray diffraction (XRD) for determination of crystal structure, scanning electron microscopy (SEM) for morphological study, high resolution transmission electron spectroscopy (HRTEM) used for determine particle size, fourier transform infrared (FTIR) spectroscopy for functional group detection, thermogravametric analysis (TGA)/differential thermal analysis (DTA) for determine thermal stability of GO.
Revisiting the BE99 method for the study of outflowing gas in protostellar jets
Creators: name: Sperling, T.
name: Eislöffel, J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: An established method measuring the hydrogen ionisation fraction in shock excited gas is the BE99 method, which utilises six bright forbidden emission lines of [SII]6716, 6731, [NII]6548, 6583, and [OI]6300, 6363. We aim to extent the BE99 method by including more emission lines in the blue and near-infrared part of the spectrum ($λ$ = 3500-11000A), and considering higher hydrogen ionisation fractions ($x_e > 0.3$). In addition, we investigate how a non-equilibrium state of the gas and the presence of extinction influence the BE99 technique. We find that plenty additional emission line ratios can in principle be exploited as extended curves (or stripes) in the ($x_e, T_e$)-diagram. If the BE99 equilibrium is reached and extinction is corrected for, all stripes overlap in one location in the ($x_e, T_e$)-diagram indicating the existing gas parameters. The application to the Par Lup 3-4 outflow shows that the classical BE99 lines together with the [NI]5198+5200 lines do not meet in one locationin the ($x_e, T_e$)-diagram. This indicates that the gas parameters derived from the classical BE99 method are not fully consistent with other observed line ratios. A multi-line approach is necessary to determine the gas parameters. From our analysis we derive $n_e \sim$ 45 000 cm^-3 - 53000 cm^-3 , $T_e$ = 7600K - 8000K, and $x_e \sim$ 0.027 - 0.036 for the Par Lup 3-4 outflow. For the 244-440 Proplyd we were able to use the line ratios of [SII]6716+6731, [OI]6300+6363, and [OII]7320, 7330 in the BE99 diagram to estimate the ionisation fraction at knot E3 ($x_e = 0.58 \pm 0.05$). In conclusion, exploiting new line ratios reveals more insights on the state of the gas. Our analysis indicates, however, that a multi-line approach is more robust in deriving gas parameters, especially for high density gas.
description: 12 pages, 10 figures, accepted to A&A
Electron correlation in the two-dimensional triangle lattice of Na$_x$CoO$_2$
Creators: name: Sugiyama, J.
name: Brewer, J. H.
name: Ansaldo, E. J.
name: Hitti, B.
name: Mikami, M.
name: Mori, Y.
name: Sasaki, T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetism of layered cobaltites Na$_x$CoO$_2$ with $x$ = 0.6 and 0.9 has been investigated by a positive muon spin rotation and relaxation ($μ^+$SR) spectroscopy together with magnetic susceptibility and specific heat measurements, using single crystal samples in the temperature range between 250 and 1.8 K. Zero-field (ZF-) $μ^+$SR measurements on Na$_{0.9}$CoO$_2$ indicates a transition from a paramagnetic to an incommensurate spin density wave state at 19 K(=$T_{\sf SDW}$). The anisotropic ZF-$μ^+$SR spectra suggest that the oscillating moments of the {\sf IC-SDW} directs along the c-axis. Since Na$_{0.6}$CoO$_2$ is paramagnetic down to 1.8 K, the magnitude of $T_{\sf SDW}$ is found to strongly depend on $x$.This behavior is well explained using the Hubbard model within a mean field approximation on two-dimensional triangle lattice in the CoO$_2$ plane. Also, both the appearance of the {\sf IC-SDW} state by the change in $x$ and the magnitude of the electronic specific heat parameter of Na$_{0.6}$CoO$_2$ indicate that Na$_x$CoO$_2$ is unlikely to be a typical strongly correlated electron system.
description: 8 pages, 6 figures
A resistive force model of legged locomotion on granular media
Creators: name: Li, Chen
name: Zhang, Tingnan
name: Goldman, Daniel I.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Compared to agile legged animals, wheeled and tracked vehicles often suffer large performance loss on granular surfaces like sand and gravel. Understanding the mechanics of legged locomotion on granular media can aid the development of legged robots with improved mobility on granular surfaces; however, no general force model yet exists for granular media to predict ground reaction forces during complex limb intrusions. Inspired by a recent study of sand-swimming, we develop a resistive force model in the vertical plane for legged locomotion on granular media. We divide an intruder of complex morphology and kinematics, e.g., a bio-inspired robot L-leg rotated through uniform granular media (loosely packed ~ 1 mm diameter poppy seeds), into small segments, and measure stresses as a function of depth, orientation, and direction of motion using a model leg segment. Summation of segmental forces over the intruder predicts the net forces on both an L-leg and a reversed L-leg rotated through granular media with better accuracy than using simple one-dimensional penetration and drag force models. A multi-body dynamic simulation using the resistive force model predicts the speeds of a small legged robot (15 cm, 150 g) moving on granular media using both L-legs and reversed L-legs.
Biblioteca - a mais Antiga Maquina do Tempo a Caminho das «NET» Notas para uma Proposta Oportuna
Creators: name: Lage, Maria Otília Pereira
Publisher: name: Cadernos BAD
Year: 1996

description: Biblioteca - a mais Antiga Maquina do Tempo a Caminho das «NET» Notas para uma Proposta Oportuna
description: Cadernos BAD, N.º 2 (1996)
On the number of limit cycles in diluted neural networks
Creators: name: Hwang, Sungmin
name: Lanza, Enrico
name: Parisi, Giorgio
name: Rocchi, Jacopo
name: Ruocco, Giancarlo
name: Zamponi, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider the storage properties of temporal patterns, i.e. cycles of finite lengths, in neural networks represented by (generally asymmetric) spin glasses defined on random graphs. Inspired by the observation that dynamics on sparse systems have more basins of attractions than the dynamics of densely connected ones, we consider the attractors of a greedy dynamics in sparse topologies, considered as proxy for the stored memories. We enumerate them using numerical simulation and extend the analysis to large systems sizes using belief propagation. We find that the logarithm of the number of such cycles is a non monotonic function of the mean connectivity and we discuss the similarities with biological neural networks describing the memory capacity of the hippocampus.
description: 10 pages, 11 figures
The MUSE Extremely Deep Field: Classifying the Spectral Shapes of Lya Emitting Galaxies
Creators: name: Vitte, E.
name: Verhamme, A.
name: Hibon, P.
name: Leclercq, F.
name: Pampliega, B. Alcalde
name: Kerutt, J.
name: Kusakabe, H.
name: Matthee, J.
name: Guo, Y.
name: Bacon, R.
name: Maseda, M.
name: Richard, J.
name: Pharo, J.
name: Schaye, J.
name: Boogaard, L.
name: Nanayakkara, T.
name: Contini, T.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Hydrogen Lyman-alpha (Lya) line shows a large variety of shapes which is caused by factors at different scales, from the interstellar medium to the intergalactic medium. This work aims to provide a systematic inventory and classification of the spectral shapes of Lya emission lines to understand the general population of high-redshift Lya emitting galaxies (LAEs). Using the data from the MUSE eXtremely Deep Field, we select 477 galaxies at z=2.8-6.6. We develop a method to classify Lya emission lines in four spectral and three spatial categories, by combining a spectral analysis with a narrow-band image analysis. We measure spectral properties, such as the peak separation and the blue-to-total flux ratio. To ensure a robust sample for statistical analysis, we define a final unbiased sample of 206 galaxies by applying thresholds for signal-to-noise ratio, peak separation, and Lya luminosity. Our analysis reveals that between 32% and 51% of the galaxies exhibit double-peaked profiles. This fraction seems to evolve dependently with the Lya luminosity, while we don't notice a severe decrease of this fraction with redshift. A large amount of these double-peaked profiles shows blue-dominated spectra, suggesting unique gas dynamics and inflow characteristics in some high-redshift galaxies. Among the double-peaked galaxies, 4% are spurious detections. Around 20% out of the 477 sources of the parent sample lie in a complex environment, meaning there are other clumps or galaxies at the same redshift within a distance of 30kpc. Our results suggest that the Lya double-peak fraction may trace the evolution of IGM attenuation, but faintest galaxies are needed to be observed at high redshift. In addition, it is crucial to obtain secure systemic redshifts for LAEs to better constrain the nature of the double-peaks.
description: 36 pages, 29 figures, 9 tables, accepted for publication in A&A
Carta de Direitos das Bibliotecas Escolares e outras Unidades Documentais nas Escolas Portuguesas
Creators: name: BAD, Cadernos
Publisher: name: Cadernos BAD
Year: 1996

description: Carta de Direitos das Bibliotecas Escolares e outras Unidades Documentais nas Escolas Portuguesas
description: Cadernos BAD, N.º 2 (1996)
Domestic Food Assistance Programs: Measuring Benefits to Producers
Creators: name: Martinez, Steve W.
name: Dixit, Praveen M.
name: Martinez, Steve W.
name: Dixit, Praveen M.
Publisher: name: Unknown
Year: 1992
Subjects: subject: Consumer/Household Economics
subject: Food Security and Poverty
subject: Consumer subsidy equivalents (CSE's)
subject: food assistance programs
subject: Food Stamp Program
subject: additionality
subject: SWOPSIM

description: U.S. food assistance programs are estimated to have increased food expenditures by $7.7 billion in 1989/90. The additionality per dollar was higher for school lunch (66 cents) and school breakfast ($1.00) programs than for the Food Stamp Program (28 cents). Farm income rose by 6 cents for each dollar of food assistance. The effects on farm prices were very small, averaging less than 1 percent. Effect on dairy prices was greater.
Productivity of Brazilian Agriculture: Measurement and Uses
Creators: name: Arnade, Carlos A.
name: Arnade, Carlos A.
Publisher: name: Unknown
Year: 1992
Subjects: subject: Agricultural and Food Policy
subject: Productivity Analysis
subject: Brazil
subject: multifactor productivity
subject: indices

description: This report presents multifactor productivity indices of Brazil's agricultural sector. The imposed restriction, that the production technology is constant returns to scale, influences calculation of indices. The difference between the constant returns-to-scale index and the more general index derived here indicates that constant returns to scale is an overly restrictive assumption for Brazilian agriculture. This report presents indices for eight categories of inputs (energy, feed and seed, fertilizers, labor, land, pesticides, livestock, and machinery) and describes and documents the data used in calculation of the indices.
Half-line Schrodinger Operators With No Bound States
Creators: name: Damanik, David
name: Killip, Rowan
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider Schödinger operators on the half-line, both discrete and continuous, and show that the absence of bound states implies the absence of embedded singular spectrum. More precisely, in the discrete case we prove that if $Δ+ V$ has no spectrum outside of the interval $[-2,2]$, then it has purely absolutely continuous spectrum. In the continuum case we show that if both $-Δ+ V$ and $-Δ- V$ have no spectrum outside $[0,\infty)$, then both operators are purely absolutely continuous. These results extend to operators with finitely many bound states.
description: 34 pages
A systematic study of Galactic infrared bubbles along the Galactic plane with AKARI and Herschel. II. Spatial distributions of dust components around the bubbles
Creators: name: Hanaoka, Misaki
name: Kaneda, Hidehiro
name: Suzuki, Toyoaki
name: Kokusho, Takuma
name: Oyabu, Shinki
name: Ishihara, Daisuke
name: Kohno, Mikito
name: Furuta, Takuya
name: Tsuchikawa, Takuro
name: Saito, Futoshi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galactic infrared (IR) bubbles, which can be seen as shell-like structures at mid-IR wavelengths, are known to possess massive stars within their shell boundaries. In our previous study, Hanaoka et al. (2019) expanded the research area to the whole Galactic plane ($0^{\circ} \leq l \leq 360^{\circ}$, $|b| \leq 5^{\circ}$) and studied systematic differences in the shell morphology and the IR luminosity of the IR bubbles between inner and outer Galactic regions. In this study, utilizing high spatial-resolution data of AKARI and WISE in the mid-IR and Herschel in the far-IR, we investigate the spatial distributions of dust components around each IR bubble to discuss the relation between the star-formation activity and the dust properties of the IR bubbles. For the 247 IR bubbles studied in Hanaoka et al. (2019), 165 IR bubbles are investigated in this study, which have the Herschel data ($|b| \leq 1^{\circ}$) and known distances. We created their spectral energy distributions on a pixel-by-pixel basis around each IR bubble, and decomposed them with a dust model consisting of polycyclic aromatic hydrocarbons (PAHs), hot dust, warm dust and cold dust. As a result, we find that the offsets of dust heating sources from the shell centers in inner Galactic regions are systematically larger than those in outer Galactic regions. Many of the broken bubbles in inner Galactic regions show large angles between the offset and the broken shell directions from the center. Moreover, the spatial variations of the PAH intensity and cold dust emissivity around the IR bubbles in inner Galactic regions are larger than those in outer Galactic regions. We discuss these results in light of the interstellar environments and the formation mechanism of the massive stars associated with the IR bubbles.
description: 20 pages, 14 figures, accepted for publication in PASJ
Sub and Super-Luminal Propagation of Intense Pulses in Media with Saturated and Reverse Absorption
Creators: name: Agarwal, G. S.
name: Dey, T. N.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop models for the propagation of intense pulses in solid state media which can have either saturated absorption or exhibit reverse absorption . We show that the experiments of Bigelow {\it et al.}[Phys. Rev. Lett. {\bf 90}, 113903 (2003); Science {\bf 301}, 200 (2003).] on subluminal propagation in Ruby and superluminal propagation in Alexandrite are well explained by modelling them as three level and four level systems coupled to Maxwell equations. We present results well beyond the traditional pump-probe approach.
description: 4 pages, 6 figures
Food Strategies and Market Liberalization in Africa: Case Studies of Kenya, Tanzania, and Zimbabwe
Creators: name: Shapouri, Shahla
name: Missiaen, Margaret
name: Rosen, Stacey
name: Shapouri, Shahla
name: Missiaen, Margaret
name: Rosen, Stacey
Publisher: name: Unknown
Year: 1992
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: Africa
subject: food security
subject: agricultural policy
subject: structural adjustment
subject: market liberalization
subject: Kenya
subject: Tanzania
subject: Zimbabwe

description: This report analyzes the food strategies of Kenya, Tanzania, and Zimbabwe during the 1980's. The overall objectives of these countries' food policies were to achieve food self-sufficiency and improve the nutritional status of the population. With policy reforms, price and input subsidies declined, and increases in input prices offset the effect of increases in producer prices. A simulation model was developed to project changes in consumption, production, and imports brought about by market liberalization. Simulation results indicate that market liberalization alone is not sufficient to stimulate production to keep pace with population growth. Low rates of production growth, if accompanied by the continuation of historical income growth and the elimination of price subsidies, will reduce food consumption by the low-income groups.
Light element variations within the different age-metallicity populations in the nucleus of the Sagittarius dwarf
Creators: name: Sills, Alison
name: Dalessandro, Emanuele
name: Cadelano, Mario
name: Alfaro-Cuello, Mayte
name: Kruijssen, J. M. Diederik
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The cluster M54 lies at the centre of the Sagittarius dwarf spheroidal galaxy, and therefore may be the closest example of a nuclear star cluster. Either in-situ star formation, inspiralling globular clusters, or a combination have been invoked to explain the wide variety of stellar sub-populations in nuclear star clusters. Globular clusters are known to exhibit light element variations, which can be identified using the photometric construct called a chromosome map. In this letter, we create chromosome maps for three distinct age-metallicity sub-populations in the vicinity of M54. We find that the old, metal-poor population shows the signature of light element variations, while the young and intermediate-age metal rich populations do not. We conclude that the nucleus of Sagittarius formed through a combination of in-situ star formation and globular cluster accretion. This letter demonstrates that properly constructed chromosome maps of iron-complex globular clusters can provide insight into the formation locations of the different stellar populations.
description: Accepted by MNRAS Letters
Delocalisation transition in chains with correlated disorder
Creators: name: Schubert, Gerald
name: Weisse, Alexander
name: Fehske, Holger
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We show that in the one-dimensional (1D) Anderson model long-range correlations within the sequence of on-site potentials may lead to a region of extended states in the vicinity of the band centre, i.e., to a correlation-induced insulator-metal transition. Thus, although still disordered, the 1D system can behave as a conductor.
description: 2 pages, 3 figures, submitted to SCES'04
ReFreeDrive - Deliverable 6.10: Power Electronics for the 200kW power setting (Executive Summary only)
Creators: name: Battiston, Alexandre
name: Milosavljevic, Misa
Publisher: name: Zenodo
Year: 2021
Subjects: power electronics
printed circuit boards
SiC modules
high power range inverter
DC bus bars

description: Executive Summary corresponding to the ReFreeDrive project deliverable D6.10: "Power Electronics for the 200kW power setting"
Processed Apple Sales, 1986-90: The Effects of Market Factors
Creators: name: Harris, J. Michael
name: Harris, J. Michael
Publisher: name: Unknown
Year: 1992
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Processed apple products
subject: scanner data
subject: Alar
subject: price
subject: income
subject: seasonal factors
subject: elasticities

description: This report uses supermarket scanner data to assess the effects of market factors, including product price, consumer income, price of substitutes, and seasonality, on processed apple consumption. Processed apple products, which include apple juice, applesauce, and baby food, account for 40 percent of total apple consumption. These products are used in demand equations here because supermarket data are more inclusive of processed than unprocessed apples. The Alar scare of 1989, another demand factor, reduced the consumption of canned apple juice by 0.02 pound per month per capita and frozen apple juice by 0.005 pound.
Cartas de Direito do Aluno na Era da informação
Creators: name: BAD, Cadernos
Publisher: name: Cadernos BAD
Year: 1996

description: Trad. Maria José Vitorino/1996, a partir das versões em inglês (1995) e em francês (1996)
description: Cadernos BAD, N.º 2 (1996)
Spectral Energy Distribution Modeling of Broad Emission Line Quasars: From X-ray to Radio Wavelengths
Creators: name: Chakraborty, Avinanda
name: Kundu, Maitreya
name: Chatterjee, Suchetana
name: Panda, Swayamtrupta
name: Sar, Arijit
name: Jaison, Sandra
name: Chatterjee, Ritaban
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the differences in physical properties of quasar-host galaxies using an optically selected sample of radio loud (RL) and radio quiet (RQ) quasars (in the redshift range 0.15 < z < 1.9) which we have further cross-matched with the VLA-FIRST survey catalog. The sources in our sample have broad Hbeta and MgII emission lines (1000 km/s < FWHM < 15000 km/s) with a subsample of high broad line quasars (FWHM > 15000 km/s). We construct the broadband spectral energy distribution (SED) of our broad line quasars using multi-wavelength archival data and targeted observations with the AstroSat telescope. We use the state-of-the-art SED modeling code CIGALE v2022.0 to model the SEDs and determine the best-fit physical parameters of the quasar host galaxies namely their star-formation rate (SFR), main-sequence stellar mass, luminosity absorbed by dust, e-folding time and stellar population age. We find that the emission from the host galaxy of our sources is between 20%-35% of the total luminosity, as they are mostly dominated by the central quasars. Using the best-fit estimates, we reconstruct the optical spectra of our quasars which show remarkable agreement in reproducing the observed SDSS spectra of the same sources. We plot the main-sequence relation for our quasars and note that they are significantly away from the main sequence of star-forming galaxies. Further, the main sequence relation shows a bimodality for our RL quasars indicating populations segregated by Eddington ratios. We conclude that RL quasars in our sample with lower Eddington ratios tend to have substantially lower star-formation rates for similar stellar mass. Our analyses, thus, provide a completely independent route in studying the host galaxies of quasars and addressing the radio dichotomy problem from the host galaxy perspective.
description: Accepted in Astronomy & Astrophysics journal
East Mall Redesign - Final Detailed Design Report
Creators: name: Orr, Benny
name: Su, Davis
name: Barkh, Hamed
name: Qiu, Colleen
name: Inoda, Shota
name: Luo, Melissa
Publisher: name: The University of British Columbia
Year: 2021

description: The following report contains a detailed design summary report for the UBC East Mall Redesign from Stadium Road to Agronomy Road with tie ins into the planned Stadium Neighbourhood. The project’s objectives are to: (1) maximize safety, (2) minimize cost, (3) increase active mode share, (4) calm traffic, (5) increase green space to improve stormwater retention, (6) tie-in with the proposed Stadium Neighbourhood alignment, and (7) accommodate the sports field’s high pick-up / drop-off (PUDO) demand. The following document is a summary of the detailed design including a design overview, issue-for-construction drawings, cost estimate, schedule, life cycle analysis, and maintenance. The selected design includes raised bike lanes, parking lane changes, rain gardens, curb extensions, and crosswalk upgrades along East Mall and a cantilevered steel walkway along Agronomy Road. The key considerations for the design have remained the same throughout the duration of the project, namely: client objectives, design feasibility, and stakeholder feedback. To arrive at the detailed design the following analyses were conducted: traffic analyses to inform the geometric design, a structural analysis for the walkway, stormwater analysis for rain gardens, and a life cycle analysis for determining the optimal service-life maintenance plan. The detailed design has a Class A cost estimate of $3,578,000 and the project is on track to be constructed between May 10th and is expected to be completed by February 1st 2022 with a median time to completion of 186 work days excluding weekends and holidays. The project’s next steps include tendering the project and obtaining relevant permits and approvals. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Asteroseismic modeling of gravity modes in slowly rotating A/F stars with radiative levitation
Creators: name: Mombarg, Joey S. G.
name: Dotter, Aaron
name: Van Reeth, Timothy
name: Tkachenko, Andrew
name: Gebruers, Sarah
name: Aerts, Conny
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It has been known for several decades that transport of chemical elements is induced by the process of microscopic atomic diffusion. Yet, the effect of atomic diffusion, including radiative levitation, has hardly been studied in the context of gravity mode pulsations of core-hydrogen burning stars. In this paper, we study the difference in the properties of such modes for models with and without atomic diffusion. We perform asteroseismic modeling of two slowly rotating A- and F-type pulsators, KIC11145123 ($f_{\rm rot} \approx0.010~{\rm d}^{-1}$) and KIC9751996 ($f_{\rm rot} \approx0.0696~{\rm d}^{-1}$), respectively, based on the periods of individual gravity modes. For both stars, we find models whose g-mode periods are in very good agreement with the {\it Kepler\/} asteroseismic data, keeping in mind that the theoretical/numerical precision of present-day stellar evolution models is typically about two orders of magnitude lower than the measurement errors. Using the Akaike Information Criterion (AIC) we have made a comparison between our best models with and without diffusion, and found very strong evidence for signatures of atomic diffusion in the pulsations of KIC11145123. In the case of KIC9751996 the models with atomic diffusion are not able to explain the data as well as the models without it. Furthermore, we compare the observed surface abundances with those predicted by the best fitting models. The observed abundances are inconclusive for KIC9751996, while those of KIC11145123 from the literature can better be explained by a model with atomic diffusion.
description: Accepted for publication in ApJ
An Economist's View of the Catering Sector
Creators: name: Loader, Rupert
name: Loader, Rupert
Publisher: name: Unknown
Year: 1992
Subjects: Food Consumption/Nutrition/Food Safety

description: The topic is tackled in five sections; the first considers general economic issues concerning services, followed by consideration of catering economics under four headings: The Market Demand for Catering Services; The Market Supply of Catering Services; Other Supply Issues; and Consumer Behaviour.
Octahedral Rotation Induced, Antiferroelectric-like Double Hysteresis in Strained Perovskites
Creators: name: Jung, Seongjoo
name: Birol, Turan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Antiferroelectrics, which host both polar and antipolar order parameters, are characterized by the double hysteresis loops which are advantageous for various applications such as high-density energy storage. In this study, we investigate the coupling between oxygen octahedral rotations and polarization in well-known perovskites, with a focus on SrTiO$_3$. Using first-principles calculations and symmetry-adapted Landau-Ginzburg-Devonshire theory, we construct an energy landscape to analyze how this coupling shapes polarization-voltage hysteresis behavior. We show that tuning the relative strength of polar and rotational instabilities by exploiting epitaxial strain and layering leads to nontrivial hysteresis behavior. Consequently, the rotation coupling with polarization leads to an expanded search space of materials exhibiting antiferroelectric-like double hysteresis.
Probing nuclear effects in neutrino CC1π+ interactions with Transverse Kinematic Imbalance measurement in T2K
Creators: name: Tsui, Ka Ming
Publisher: name: Zenodo
Year: 2021
Subjects: Neutrino, Cross Sections

description: Parallel Contributed Talk at the "XIX International Workshop on Neutrino Telescopes"
 on line - 18-26 February, 2021
description: on behalf of T2K Collaboration
CONSUMER EATING HABITS AND THE IMPLICATIONS FOR THE CATERING SECTOR
Creators: name: Slater, J.M.
name: Cawley, D.
name: Slater, J.M.
name: Cawley, D.
Publisher: name: Unknown
Year: 1992
Subjects: Food Consumption/Nutrition/Food Safety

description: The consumer is at the end of a sometimes long and complicated food and drink processing and distribution chain. Within this framework the consumer may be seen as playing two roles: firstly as a purchaser of food from the retail sector, usually for consumption within the home, and secondly as a purchaser of the products and services of the catering sector usually for consumption outside the home. Obviously there is a very close link between these two roles; the more meals that are eaten at home the fewer will be the demands made on the catering sector. It is not the case, however, that there is a neat dividing line between the two roles; while some activities, such as eating out at a restaurant or consuming a cooked meal prepared at home are readily classifiable under one or other heading, there is an increasingly blurred area falling somewhere between the two. Takeaway food is often consumed at home but there is a wide range of ready meals available from the retail sector requiring no preparationother than heating in a microwave oven - a treatment also sometimes applied to takeaway meals. Thus when considering prospects for the catering sector, it is important to keep in mind that the distinction between household and catering consumption may not always be clear - least of all in the mind of the consumer.
Automated Generation of Dimensioned Rectangular Floorplans
Creators: name: Upasani, Nitant
name: Shekhawat, Krishnendra
name: Sachdeva, Garv
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Geometry (cs.CG)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: This paper proposes a methodology for the automated construction of rectangular floorplans (RFPs) while addressing dimensional constraints and adjacency relations. Here, adjacency relations are taken in the form of a dimensionless rectangular arrangement (RA) ensuring the existence of a RFP, while dimensional constraints are given in terms of minimum width and aspect ratio range for each room. A linear optimization model is then presented to obtain a feasible dimensioned RFP for user-defined constraints. A GUI is also developed for the automated generation of RFPs. The proposed model is able to generate feasible solutions for every possible RA in a reasonable amount of time. From the architectural perspective, this work can be seen as a re-generation of well-known architectural plans with modified dimensions. In the end, the regeneration of existing legacy RFPs (corresponding to the user-defined dimensions) has been demonstrated, taking their image as input.