cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
EXPORT PERFORMANCE IN AFRICA
Creators: name: Shapouri, Shahla
name: Rosen, Stacey
name: Shapouri, Shahla
name: Rosen, Stacey
Publisher: name: Unknown
Year: 1989
Subjects: subject: International Relations/Trade
subject: Productivity Analysis
subject: Africa
subject: export earnings
subject: exchange rates
subject: primary commodities
subject: nonagricultural exports
subject: export diversification and stability
subject: world commodity prices

description: As the scarcity of foreign exchange continues, Africa's export sector must play the key role in generating investment income for Africa's financial recovery. The average annual increase in real export earnings for the countries included in this study was less than 1 percent from 1980 to 1986. Along with slow growth, the instability of export earnings has a destabilizing effect on import capacity and economic growth. The coefficients of variation of export earnings averaged about 26 percent; an index of export shortfalls averaged about 10 percent. Commodity diversification was found to be a significant factor in improving export earnings growth and reducing export instability. Given the slow movement toward diversification, the performance of primary commodities, especially prices, and improved government incentives will remain the key factors in Africa's export and economic recovery.
title: Die Metamorphosen des Pelikans
title: Exempel und Auslegung in mittelalterlicher Literatur. Mit Beispielen aus der bildenden Kunst und einem Bildanhang
titleType: Subtitle
Creators: name: Gerhardt, Christoph
Publisher: name: Trier University
Year: 2021

description: Großangelegte, sehr gelehrte und materialhaltige Studie über das Pelikan-Exempel in der Literatur und bildenden Kunst des Mittelalters und der frühen Neuzeit. Mit einem umfangreichen Abbildungsteil.
Are ultra-diffuse galaxies Milky Way-sized?
Creators: name: Chamba, Nushkia
name: Trujillo, Ignacio
name: Knapen, Johan H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Now almost 70 years since its introduction, the effective or half-light radius has become a very popular choice for characterising galaxy size. However, the effective radius measures the concentration of light within galaxies and thus does not capture the intuitive definition of size which is related to the edge or boundary of objects. For this reason, we aim to demonstrate the undesirable consequence of using the effective radius to draw conclusions about the nature of faint 'ultra-diffuse galaxies' (UDGs) when compared to dwarfs and Milky Way-like galaxies. Instead of the effective radius, we use a measure of galaxy size based on the location of the gas density threshold required for star formation. Compared to the effective radius, this physically motivated definition places the sizes much closer to the boundary of a galaxy. Therefore, considering the sizes and stellar mass density profiles of UDGs and regular dwarfs, we find that the UDGs have sizes that are within the size range of dwarfs. We also show that currently known UDGs do not have sizes comparable to Milky Way-like objects. We find that, on average, UDGs are ten times smaller in extension than Milky Way-like galaxies. These results show that the use of size estimators sensitive to the concentration of light can lead to misleading results.
description: 9 pages, 7 figures, published in A&A Letters. Key result of the paper is shown in Figure 5. For a discussion on the physically motivated size definition used, see Trujillo et al. (2020)
A Small Radio Telescope: Construction, Calibration and Observation of the Hydrogen Line in the Milky Way
Creators: name: Thiellesen, Lasse
name: Grøndahl, Lau Blom
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Radio astronomy
subject: Radio frequency

description: Poster providing an overview of the L-band 3 meter radio telescope built by the student goup called RadioSTAR at the University of Southern Denmark.

RadioSTAR (STudent Astronomy with Radiotelescopes) is a purely student driven radio telescope and radio interferometry project. We use this project as a platform for students to learn about astronomy, physics, and engineering by building small scale radio telescopes and a radio interferometer.

In this project we built a radio telescope for measuring the galactic rotation curve of the Milkyway galaxy.
Characterizations and constructions of n-to-1 mappings over finite fields
Creators: name: Niu, Tailin
name: Li, Kangquan
name: Qu, Longjiang
name: Li, Chao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences
subject: 11T06

description: $n$-to-$1$ mappings have wide applications in many areas, especially in cryptography, finite geometry, coding theory and combinatorial design. In this paper, many classes of $n$-to-$1$ mappings over finite fields are studied. First, we provide a characterization of general $n$-to-$1$ mappings over $\mathbb{F}_{p^m}$ by means of the Walsh transform. Then, we completely determine $3$-to-$1$ polynomials with degree no more than $4$ over $\mathbb{F}_{p^{m}}$. Furthermore, we obtain an AGW-like criterion for characterizing an equivalent relationship between the $n$-to-$1$ property of a mapping over finite set $A$ and that of another mapping over a subset of $A$. Finally, we apply the AGW-like criterion into several forms of polynomials and obtain some explicit $n$-to-$1$ mappings. Especially, three explicit constructions of the form $x^rh\left( x^s \right) $ from the cyclotomic perspective, and several classes of $n$-to-$1$ mappings of the form $ g\left( x^{q^k} -x +δ\right) +cx$ are provided.
description: 23 pages, submitted to a journel
Channels for streaming instability in dusty discs
Creators: name: Jaupart, Etienne
name: Laibe, Guillaume
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Streaming instability is a privileged channel to bridge the gap between collisional growth of dust grains and planetesimal formation triggered by gravity. This instability is thought to develop through its secular mode, which is long-time growing and may not develop easily in real discs. We address this point by revisiting its perturbation analysis. A third-order expansion with respect to the Stokes number reveals important features over-looked so far. The secular mode can be stable. Epicycles can be unstable, more resistant to viscosity and are identified by Green's function analysis as promising channels for planetesimals formation.
description: Accepted for publication in MNRAS. 8 pages, 4 figures
Die Federzeichnungen in der Arnsteiner Bibel (fol 1r, 241v-243r) unter besonderer Berücksichtigung der ‚Wunder des Ostens‘ Christliche und jüdische Bibliophilie
Creators: name: Gerhardt, Christoph
Publisher: name: Trier University
Year: 2021

description: In dem überaus prächtig illuminierten zweiten Band der Arnsteiner Riesenbibel (London, British Library, Harley Ms. 2799; 547 x 371 mm) ist eine Reihe von (Kreis-) Schemata und Zeichnungen überliefert, die, nach dem Eindruck der Schrift zu urteilen, in unmittelbarer zeitlicher Nachbarschaft zu dem Entstehungsdatum der Amsteiner Bibel selbst ( ca. 1172) noch in den siebziger Jahren des 12. Jahrhunderts entstanden sein könnten. […] Diese Federzeichnungen sind mit äußerster Sorgfalt gezeichnet, ja mit ästhetischer Qualität und alles andere als Fingerübungen oder Blattfüllsel. Dass sie in der Amsteiner Bibel dennoch auf den ersten Blick ein Fremdkörper sind, steht auf einem anderen Blatt. Das Miteinander von Bibelprachthandschrift und schematischen Zeichnungen zu Themen aus dem Bereich der Komputistik, Kosmologie, Astronomie und Universalkartographie ist ungewöhnlich, aufregend und fordert eine Erklärung.
SOME ECONOMIC EFFECTS OF RESTRICTED GRAZING ON PUBLIC LAND IN COLORADO
Creators: name: Mack, L.E.
name: Taylor, R.G.
name: Mack, L.E.
name: Taylor, R.G.
Publisher: name: Unknown
Year: 1979
Subjects: Research and Development/Tech Change/Emerging Technologies

description: Federal lands comprise 36 percent of the total area of Colorado. At present the primary use of these lands is livestock grazing. Pressures exist to reduce or, in some instances, eliminate livestock grazing. This study, through the use of typical ranch models structured by herd size and regional characteristics, examines how the range livestock industry would respond to hypothesized reductions in federal forage availability.
Reconstructing the observed ionizing photon production efficiency at z~2 using stellar population models
Creators: name: Nanayakkara, Themiya
name: Brinchmann, Jarle
name: Glazebrook, Karl
name: Bouwens, Rychard
name: Kewley, Lisa
name: Tran, Kim-Vy
name: Cowley, Michael
name: Fisher, Deanne
name: Kacprzak, Glenn G.
name: Labbe, Ivo
name: Straatman, Caroline
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The ionizing photon production efficiency, $ξ_{ion}$, is a critical parameter that provides a number of physical constraints to the nature of the early Universe, including the contribution of galaxies to the timely completion of the reionization of the Universe. Here we use KECK/MOSFIRE and ZFOURGE multi-band photometric data to explore the $ξ_{ion}$ of a population of galaxies at $z\sim2$ with $log_{10}(M_*/M_\odot)\sim9.0-11.5$. Our 130 \Halpha\ detections show a median $log_{10}(ξ_{ion}[Hz/erg])$ of $24.8\pm0.5$ when dust corrected using a Calzetti et al. (2000) dust prescription. Our values are typical of mass/magnitude selected $ξ_{ion}$ values observed in the $z\sim2$ Universe. Using BPASSv2.2.1 and Starburst99 stellar population models with simple parametric star-formation-histories (SFH), we find that even with models that account for effects of stellar evolution with binaries/stellar rotation, model galaxies at $log_{10}(ξ_{ion}[Hz/erg])\lesssim25.0$ have low H$α$ equivalent widths (EW) and redder colors compared to our $z\sim2$ observed sample. We find that introducing star-bursts to the SFHs resolve the tension with the models, however, due to the rapid time evolution of $ξ_{ion}$, H$α$ EWs, and rest-frame optical colors, our Monte Carlo simulations of star-bursts show that random distribution of star-bursts in evolutionary time of galaxies are unlikely to explain the observed distribution. Thus, either our observed sample is specially selected based on their past SFH or stellar models require additional mechanisms to reproduce the observed high UV luminosity of galaxies for a given production rate of hydrogen ionizing photons.
description: Accepted for publication in the ApJ, 8 figures, 15 pages
Mapping Productivity: The Energy-Productivity Map – with links to the literature.
Creators: name: Boehnert, Joanna
name: Renaud, Clément
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 120307 Visual Communication Design (incl. Graphic Design)
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: HTML record and screenshots of two interactive knowledge maps based on a participatory system mapping process and wellbeing and productivity, linked to the literature review for the Mapping Productivity research project.
The HTML record needs to be downloaded in order to view in browser. This is a fixed record, the live version can be found here.
Anomalous scaling of conductivity in integrable fermion systems
Creators: name: Prelovsek, P.
name: Shawish, S. El
name: Zotos, X.
name: Long, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze the high-temperature conductivity in one-dimensional integrable models of interacting fermions: the t-V model (anisotropic Heisenberg spin chain) and the Hubbard model, at half-filling in the regime corresponding to insulating ground state. A microcanonical Lanczos method study for finite size systems reveals anomalously large finite-size effects at low frequencies while a frequency-moment analysis indicates a finite d.c. conductivity. This phenomenon also appears in a prototype integrable quantum system of impenetrable particles, representing a strong-coupling limit of both models. In the thermodynamic limit, the two results could converge to a finite d.c. conductivity rather than an ideal conductor or insulator scenario.
description: 6 pages, 3 figures. Submitted to PRB
Eaton Width Histograms: Endscrapers, Flake Scrapers, Side Scrapers
Creators: name: Engelbrecht, William
Year: 2021
Subjects: Western New York
Multi-component
Woodland
PaleoIndian
Archaic
Early Archaic
Historic
Middle Archaic
Late Archaic
Eaton
Domestic Structures
Ceramic
Chipped Stone
Dating Sample
Fauna
Fire Cracked Rock
Glass
Ground Stone
Human Remains
Data Recovery / Excavation

description: Histograms illustrating width of whole endscrapers (N = 133), flake scrapers (N = 129), and side scrapers (N = 63) from the Eaton site. These tools are largely unifacial.
Leptostylus zonatus Bates 1885
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Leptostylus
Leptostylus zonatus

description: 79. Leptostylus zonatus Bates, 1885
Type locality — Panama, Chiriquí: Volcán de Chiriquí. (BMNH). Distribution — Costa Rica, Panama.
 Leptostylus zonatus Bates, 1885: 388, pl. 23, fig. 24; Chemsak & Linsley, 1970: 412 (lect.); Chemsak et al., 1992: 141 (cat.).
  Leptrichillus Gilmour, 1960
 Leptrichillus Gilmour, 1960b: 91.
 Type­species — Leptrichillus minutus Gilmour, 1960 (monotypy and original designation).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
SUPPLEMENTAL FILE S2.pdf
Creators: name: Lund, Thomas
Publisher: name: figshare
Year: 2021
Subjects: subject: 70201 Animal Breeding
subject: FOS: Animal and dairy science
subject: 70206 Animal Reproduction
subject: Sociology
subject: FOS: Sociology
subject: 140301 Cross-Sectional Analysis
subject: FOS: Economics and business

description: Supplemental file S2 for the manuscript:Danish dairy farmers’ acceptance of and willingness to use semen from bulls produced by means of in vitro embryo production and genomic selection, Forthcoming in Journal of Dairy Science.
Stellar Kinematics and Environment at z~0.8 in the LEGA-C Survey: Massive, Slow-Rotators are Built First in Overdense Environments
Creators: name: Cole, Justin
name: Bezanson, Rachel
name: van der Wel, Arjen
name: Bell, Eric
name: D'Eugenio, Francesco
name: Franx, Marijn
name: Gallazzi, Anna
name: van Houdt, Josha
name: Muzzin, Adam
name: Pacifici, Camilla
name: van de Sande, Jesse
name: Sobral, David
name: Straatman, Caroline
name: Wu, Po-Feng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this letter, we investigate the impact of environment on integrated and spatially-resolved stellar kinematics of a sample of massive, quiescent galaxies at intermediate redshift ($0.6
description: 10 pages, 5 figures, submitted to ApJ Letters
title: Forest Stand Height Estimation
Creators: name: Siqueira, Paul
Publisher: name: NASA
Year: 2019

description: The measurement of forest structural characteristics is important for a variety of Monitoring, Reporting, and Verification (MRV) protocols in resource management.\r\nOne characteristic of particular importance is Forest Stand Height (FSH), or the average height of trees in a forest stand. In this context, FSH can be used an indicator\r\nof the age of a forest stand, plant and animal habitats, and the amount of Above Ground Biomass (AGB) held in the forest stand. FSH can be measured through the\r\nuse of terrestrial and/or airborne lidar, with airborne lidar being especially useful due to its wide area coverage and direct measurement of forest height. A difficulty\r\nwith airborne measurements, however, is that while these measurements work well at the tens- to hundreds-of-hectares-level, they are difficult to scale beyond that.\r\nOne method for the spatial scaling of FSH is through the use of spaceborne Synthetic Aperture Radar (SAR), especially at L-band repeat-pass Interferometric SAR\r\n(InSAR), which can be obtained through repeat observations from ALOS-2 and the future NISAR mission. In this scenario, the measure of InSAR decorrelation can\r\nbe related to FSH through the use of localized training data obtained from lidar. This chapter focuses on the use of repeat-pass InSAR for FSH estimation, and\r\npresents the theory, software, and examples of these methods. Although there is currently a limited availability of L-band SAR from ALOS-2, when NISAR launches\r\nin 2021, the presented method of FSH determination can be applied over large regions, especially when initialized using instruments such as the Global Ecosystems\r\nDynamics Investigation Lidar (GEDI) aboard the International Space Station, or other lidar observations.
The Impact of COVID-19 Pandemic on Ridesourcing Services Differed Between Small Towns and Large Cities
Creators: name: Alsaleh, Nael
name: Farooq, Bilal
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Economics (econ.GN)
subject: Computers and Society (cs.CY)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: The COVID-19 pandemic has significantly influenced all modes of transportation. However, it is still unclear how the pandemic affected the demand for ridesourcing services and whether these effects varied between small towns and large cities. We analyzed over 220 million ride requests in the City of Chicago (population: 2.7 million), Illinois, and 52 thousand in the Town of Innisfil (population: 37 thousand), Ontario, to investigate the impact of the COVID-19 pandemic on the ridesourcing demand in the two locations. Overall, the pandemic resulted in fewer trips in areas with higher proportions of seniors and more trips to parks and green spaces. Ridesourcing demand was adversely affected by the stringency index and COVID-19-related variables, and positively affected by vaccination rates. However, compared to Innisfil, ridesourcing services in Chicago experienced higher reductions in demand, were more affected by the number of hospitalizations and deaths, were less impacted by vaccination rates, and had lower recovery rates.
Meditationsbilder aus dem ehemaligen Klarissenkloster Ribnitz (Bez. Rostock, DDR)
Creators: name: Gerhardt, Christoph
Publisher: name: Trier University
Year: 2021

description: Ikonographische und frömmigkeitsgeschichtliche Untersuchung zu sechs Holztafelbildern mit Szenen der Heilsgeschichte aus der 1. Hälfte des 16. Jahrhunderts
title: SAR Methods for Mapping and Monitoring Forest Biomass
Creators: name: Saatchi, Sassan
Publisher: name: NASA
Year: 2019

description: Forests play a major role in the global carbon cycle, sequestrating more than 25% of the carbon emitted to the atmosphere from fossil fuel consumption and landuse\r\nchanges. The accumulation of carbon in forests has therefore become an effective strategy for mitigating climate change and an important mechanism for\r\ncountries to meet their emission requirements under many international protocols and agreements. Remote sensing techniques are considered the most promising\r\napproach for providing up-to-date information on the status of forest cover and carbon stocks at different scales. Among remote sensing techniques, Synthetic\r\nAperture Radar (SAR) sensors at long wavelengths have the advantage of strong sensitivity to the forest Above Ground Biomass (AGB) and the ability to quantify\r\nand monitor carbon stocks at the scale in which human activities occur. This chapter provides a summary of the methodologies and techniques for estimating\r\nforest AGB and monitoring changes from existing and future SAR satellite systems. The material in this chapter is designed to help both practitioners and remote\r\nsensing students and experts use SAR imagery for mapping and monitoring forest biomass. The examples and the bibliography capture the state of the art in SAR\r\nremote sensing of vegetation structure and biomass, and provide resources for enthusiasts to follow future developments in the technology and the methodology.
Leptrichillus minutus Gilmour 1960
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Leptrichillus
Leptrichillus minutus

description: 1. Leptrichillus minutus Gilmour, 1960
Type locality — Guatemala, Baja Verapaz: San Jerónimo. (AMNH). Distribution — Mexico to Costa Rica.
 Leptrichillus minutus Gilmour, 1960b: 92, fig. 2; Chemsak et al., 1992: 141 (cat.).
  Lepturdrys Gilmour, 1960
 Lepturdrys Gilmour, 1960a: 47.
 Type­species — Lepturdrys novemlineata Gilmour, 1960 (monotypy and original designation).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
The Effect of Mobile Phone Radiation on Human Health
Creators: name: Arrosan Rajalingam
name: Tharshika Theivendram
name: Awasthi, Shruti
Publisher: name: figshare
Year: 2021
Subjects: Biotechnology

description: A boon for better communication, cell phone usage nonetheless has many health hazards. Various studies indicate that the emissions from a cell phone can be extremely harmful, causing genetic damage, tumors, memory loss, increased blood pressure and weakening of immune systems. The fact that this radiation is invisible intangible and enters and leaves our bodies without our knowledge makes it even more intimidating.Mobile telephone radiation has had an effect on living tissue is heating. The rise in temperature on the surface of the brain caused by radiation waves is 0.3 degrees at the most. This kind of temperature rise is not known to have biological signification. The temperature of the brain normally fluctuates by about one degree, and only after a five degree increase in temperature do cell become damaged. Increase risk of brain tumor in people who have used a mobile phone for a long time (more than ten years). These studies however involve uncertainties. One source of error is a memory illusion related to the fact that mobile phone use and cell durations that took place many years are ago are difficult to recall exactly.According to the sperm count test, the test of group of man came to result of an alarming of 25 percent decrease in sperm count, due to the use of cell phones. According to the test cellphone radiation damage the sperm cells of men, causing them to lose the changes of reproducing. And also cell phone radiation effect pregnant woman may have chance that the fetus of pregnant woman may have mental health damages due to cell phone radiation.
Self-consistent analysis of stellar clusters: An application to HST data of the halo globular cluster NGC 6752
Creators: name: Souza, Stefano O.
name: Kerber, Leandro O.
name: Barbuy, Beatriz
name: Pérez-Villegas, Angeles
name: Oliveira, Raphael A. P.
name: Nardiello, Domenico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Bayesian isochrone fitting using the Markov chain Monte Carlo algorithm is applied, to derive the probability distribution of the parameters age, metallicity, reddening, and absolute distance modulus. We introduce the \texttt{SIRIUS} code by means of simulated color-magnitude diagrams, including the analysis of multiple stellar populations. The population tagging is applied from the red giant branch to the bottom of the main sequence. Through sanity checks using synthetic {\it HST} color-magnitude diagrams of globular clusters we verify the code reliability in the context of simple and multiple stellar populations. In such tests, the formal uncertainties in age or age difference, metallicity, reddening, and absolute distance modulus can reach $400$ Myr, $0.03$ dex, $0.01$ mag, and $0.03$ mag, respectively. We apply the method to analyse NGC 6752, using Dartmouth stellar evolutionary models. Assuming a single stellar population, we derive an age of $13.7\pm0.5$ Gyr and a distance of $d_{\odot}=4.11\pm 0.08$ kpc, with the latter in agreement within $~3σ$ with the inverse Gaia parallax. In the analysis of the multiple stellar populations, three {populations} are clearly identified. From the Chromosome Map and UV/Optical two-color diagrams inspection, we found a fraction of stars of $25\pm5$, $46\pm7$, and $29\pm5$ per cent, for the first, second, and third generations, respectively. These fractions are in good agreement with the literature. An age difference of $500\pm410$ Myr between the first and the third generation is found, with the uncertainty decreasing to $400$ Myr when the helium enhancement is taken into account.
description: 17 pages, 11 figures, 3 tables. Accepted for publication in ApJ
The critical equation of state of the three-dimensional O(N) universality class: N>4
Creators: name: Butti, Agostino
name: Toldin, Francesco Parisen
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We determine the scaling equation of state of the three-dimensional O(N) universality class, for N=5, 6, 32, 64. The N=5 model is relevant for the SO(5) theory of high-T_c superconductivity, while the N=6 model is relevant for the chiral phase transition in two-color QCD with two flavors. We first obtain the critical exponents and the small-field, high-temperature, expansion of the effective potential (Helmholtz free energy) by analyzing the available perturbative series, in both fixed-dimension and epsilon-expansion schemes. Then, we determine the critical equation of state by using a systematic approximation scheme, based on polynomial representations valid in the whole critical region, which satisfy the known analytical properties of the equation of state, take into account the Goldstone singularities at the coexistence curve and match the small-field, high-temperature, expansion of the effective potential. This allows us also to determine several universal amplitude ratios. We also compare our approximate solutions with those obtained in the large-N expansion, up to order 1/N, finding good agreement for N\gtrsim 32.
description: 27 pages, 8 figures. v2: Improved presentation, updated references. Nucl. Phys. B in press
NC Wilson lines and the inverse Seiberg-Witten map for nondegenerate star products
Creators: name: Behr, Wolfgang
name: Sykora, Andreas
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Open Wilson lines are known to be the observables of noncommutative gauge theory with Moyal-Weyl star product. We generalize these objects to more general star products. As an application we derive a formula for the inverse Seiberg-Witten map for star products with invertible Poisson structures.
description: 8 pages
Effects of anomalous magnetic moment of quarks on the dilepton production from hot and dense magnetized quark matter using the NJL model
Creators: name: Ghosh, Snigdha
name: Chaudhuri, Nilanjan
name: Sarkar, Sourav
name: Roy, Pradip
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Dilepton production rate (DPR) from hot and dense quark matter is studied in the presence of an arbitrary external magnetic field using the 2-flavour Nambu--Jona-Lasinio (NJL) model. The anomalous magnetic moment (AMM) of the quarks is taken into consideration while calculating the constituent quark mass as well as the DPR from the thermo-magnetic medium. An infinite number of quark Landau levels is incorporated so that no approximations are made on the strength of the background magnetic field. The analytic structure of the two point vector current correlation function in the complex energy plane reveals that, in addition to the usual Unitary cut, a non-trival Landau cut appears in the physical kinematic domains solely due to the external magnetic field. Moreover, these kinematic domains of the Unitary and Landau cuts are found to be significantly modified due to the AMM of the quarks. With finite AMM of the quarks, for certain values of the external magnetic field, the kinematically forbidden gap between the Unitary and Landau cuts are shown to vanish leading to the generation of a continuous spectrum of dilepton emission over the whole invariant mass region not observed earlier.
description: Version published in Physical Review D
The effects of network topology on metapopulation and metacommunity dynamics
Creators: name: Arancibia, Paulina A.
Publisher: name: No Publisher Supplied
Year: 2021

description: Fragmentation and habitat loss are two of the main drivers of biodiversity decline. Therefore, understanding how populations and communities perform in fragmented habitats can help us to gain valuable insights to be applied in conservation, restoration and management of natural ecosystems. Studies have shown that metapopulation and metacommunity dynamics can be modulated by the pattern of interpatch connectivity, yet empirical evidence of this is still scarce. In this dissertation I explore the effects of network topology on metapopulation and metacommunity dynamics using an experimental model system with protists, and computer simulations.In chapter 1, I compared the performance of experimental metapopulations of the aquatic ciliate Paramecium tetraurelia, engineered as random and scale-free networks. I followed occupancy and abundance patterns over 20 protist generations and found that the effect of network topology in metapopulations is modulated by the dispersal/extinction balance. I suggest that the interaction between colonization/extinction rates and network topology alters the likelihood of rescue effects which results in differential patterns of occupancy and abundance in metapopulations.In chapter 2, I increased the level of biological complexity and evaluated the effects of network topology on three-species metacommunities. After 30 protist generations the effects of network topology on metacommunity dynamics were clear at both regional and local scales. Contrary to findings of chapter 1, in this study scale-free metacommunities performed better than random metacommunities, with higher biomass, occupancy, persistence and diversity. I suggest that the heterogeneity in scale-free networks provides spatial refugia from both competition and predation, resulting in increased metacommunity persistence and function. Altogether these results highlight the importance of biological interactions to predict community dynamics and the need to observe these processes in a spatially explicit context.Finally, in chapter 3, using simulations derived from findings in chapters 1 and 2, I explore the short-term effects of different scenarios of connectivity loss, in metacommunities arranged as random and scale-free networks. I followed metacommunity occupancy for 30 generations and observed that in most scenarios, patch disconnection had a positive effect on occupancy regardless of network topology. However, the number of disturbance events had opposite effects in scale-free and random networks. Overall, these results suggest that patch isolation is beneficial for metacommunity persistence and highlight the importance of considering spatial network topology in metacommunity studies.
Cosmic Microwave Radiation Anisotropies in Brane Worlds
Creators: name: Koyama, Kazuya
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a new formulation to calculate the Cosmic Microwave Background (CMB) spectrum in the Randall Sundrum two-branes model based on recent progresses in solving the bulk geometry using a low energy approximation. The evolution of the anisotropic stress imprinted on the brane by the 5D Weyl tensor is calculated. An impact of the dark radiation perturbation on CMB spectrum is investigated in a simple model assuming an initially scale-invariant adiabatic perturbations. The dark radiation perturbation induces isocurvature perturbations, but the resultant spectrum can be quite different from the prediction of simple mixtures of adiabatic and isocurvature perturbations due to Weyl anisotropic stress.
description: 4 pages, 1 figure
Lepturdrys novemlineata Gilmour 1960
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Lepturdrys
Lepturdrys novemlineata

description: 1. Lepturdrys novemlineata Gilmour, 1960
Type locality — Brazil, Goiás: Trindade. (MNHN). Distribution — Brazil (Goiás, Bahia, Minas Gerais).
 Lepturdrys novemlineata Gilmour, 1960a: 48, fig. 2.
  Lepturgantes Gilmour. 1957
 Lepturgantes Gilmour, 1957: 21; 1960c: 173.
 Type­species — Lepturgantes variegatus Gilmour, 1957 (original designation).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Farm Credit and the Response of Reform Beneficiaries: The Case of Agrarian Reform in El Salvador
Creators: name: Rochin, Refugio I.
name: Rochin, Refugio I.
Publisher: name: Unknown
Year: 1983
Subjects: Agricultural Finance
Farm Management
International Development

description: El Salvador's agrarian reform cooperatives, which were created in March 1980, have received substantial credit through the Revolutionary Junta Government's nationalized banking system and its Institute for Agrarian Transformation (ISTA). Some 43 million was extended on an "emergency" basis in the first months of the reform in 1980, and it is still unclear what some of the money was used for. Much of it is still unpaid and accumulating penalty interest each year it is refinanced. Some 251 Phase I cooperatives currently receive production credit from banks; the Banco de Fomento Agropecuario (BFA) serves the largest number and is the bank responsible for lending to cooperatives that have severe problems. In general, the commercial banks lend to cooperatives that farm land whose former owner dealt with those banks, and they report generally good repayment by these cooperatives. Overall, about 76 percent of the production loans made to Phase I cooperatives in 1980 and 1981 were repaid, which is better than the record of other Latin American land reforms and also better than the repayment record of non-reform private landowner borrowers in El Salvador. As world interest rates have fallen, these production loans do not appear subsidized, at interest rates around 13 percent. An important link in the loan collection process is the marketing agency, and cooperatives generally sell export crops and basic grains to government marketing intermediaries. The loan repayment is deducted automatically in these cases. However, coffee growers (reform and others alike) are quite unhappy that the coffee marketing institute (INCAFE) makes them wait for payment for more than a year after they harvest the coffee. Detailed studies of the ability of a sample of Phase I cooperatives to pay their debts, including the land debt which they owe (like a mortgage), indicate that many cooperatives can make a profit on current production. They often have problems covering the interest, let alone prinicpal, of the 1980 "emergency" initial loans. On the other hand, several cooperatives cannot realistically expect to cover principal and 7.5 percent annual interest on the value of the land established by ISTA when it compensated the ex-owner. In some cases, it appears that land values declared by owners in 1976 and 1977 were greater than the true value of the land for production purposes. But further study is needed in this area. Management appears to be a limiting factor in the ability of Phase I cooperatives to earn profits in the future.
title: Sampling Designs for SAR-Assisted Forest Biomass Surveys
Creators: name: Andersen, Hans-Erik
Publisher: name: NASA
Year: 2019

description: Sampling designs that efficiently integrate information from plot data and a variety of remote sensing systems, including spaceborne SAR, are required\r\nto support cost-effective monitoring of forest biomass/carbon at regional and global scales. In particular, sampling designs and statistical modelling/\r\nestimation frameworks are desired that provide sound, statistically-rigorous assessments of uncertainty and make efficient use of expensive field\r\nplot data and more extensive use of less-expensive remotely-sensed information. In addition, these designs should also provide the flexibility to\r\naccommodate a variety of field plot configurations and remote sensing data acquisition strategies/resolutions. This chapter discusses several important\r\nconsiderations in quantifying uncertainty in multi-level sampling designs, including both the model-assisted and model-based inferential frameworks,\r\nand use simulation to illustrate the statistical properties of the estimators associated with these designs, with the goal of informing the design of forest\r\ninventory and monitoring programs in remote regions.
Cosmological Fast Optical Transients with the Zwicky Transient Facility: A Search for Dirty Fireballs
Creators: name: Ho, Anna Y. Q.
name: Perley, Daniel A.
name: Yao, Yuhan
name: Svinkin, Dmitry
name: Postigo, A. de Ugarte
name: Perley, R. A.
name: Kann, D. Alexander
name: Burns, Eric
name: Andreoni, Igor
name: Bellm, Eric C.
name: Bissaldi, Elisabetta
name: Bloom, Joshua S.
name: Dekany, Richard
name: Drake, Andrew J.
name: Fernández, José Feliciano Agüí
name: Frederiks, Dmitry
name: Graham, Matthew J.
name: Hristov, Boyan A.
name: Kasliwal, Mansi M.
name: Kulkarni, S. R.
name: Kumar, Harsh
name: Laher, Russ R.
name: Lysenko, Alexandra L.
name: Mailyan, Bagrat
name: Malacaria, Christian
name: Miller, A. A.
name: Poolakkil, S.
name: Riddle, Reed
name: Ridnaia, Anna
name: Rusholme, Ben
name: Savchenko, Volodymyr
name: Sollerman, Jesper
name: Thöne, Christina
name: Tsvetkova, Anastasia
name: Ulanov, Mikhail
name: von Kienlin, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Dirty fireballs are a hypothesized class of relativistic massive-star explosions with an initial Lorentz factor $Γ_\mathrm{init}$ below the $Γ_\mathrm{init}\sim100$ required to produce a long-duration gamma-ray burst (LGRB), but which could still produce optical emission resembling LGRB afterglows. Here we present the results of a search for on-axis optical afterglows using the Zwicky Transient Facility (ZTF). Our search yielded seven optical transients that resemble on-axis LGRB afterglows in terms of their red colors ($g-r>0$ mag), faint host galaxy ($r>23$ mag), and rapid fading ($dr/dt>1$ mag/day). Spectroscopy of the transient emission within a few days of discovery established cosmological distances ($z=0.876$ to $z=2.9$) for six events, tripling the number of afterglows with redshift measurements discovered by optical surveys without a $γ$-ray trigger. Upon a retrospective search, four events (ZTF20abbiixp/AT2020kym, ZTF21aagwbjr/AT2021buv, ZTF21aakruew/AT2021cwd, ZTF21abfmpwn/AT2021qbd) turned out to have a likely associated LGRB (GRB200524A, GRB210204A, GRB210212B, GRB210610B), while three did not (ZTF20aajnksq/AT2020blt, ZTF21aaeyldq/AT2021any, ZTF21aayokph/AT2021lfa). Our search revealed no definitive new class of events: the simplest explanation for the apparently "orphan" events is that they were regular LGRBs missed by high-energy satellites due to detector sensitivity and duty cycle, although it is possible that they were intrinsically faint in $γ$-rays or viewed slightly off-axis. We rule out a scenario in which dirty fireballs have a similar energy per solid angle to LGRBs and are an order of magnitude more common. In addition, we set the first direct constraint on the ratio of the opening angles of the material producing $γ$-rays and the material producing early optical afterglow emission, finding that they must be comparable.
description: 37 pages, 12 figures. Accepted for publication in ApJ
Teacher Leadership – Schule gemeinschaftlich führen: Einleitung
Creators: name: Strauss, Nina-Cathrin
name: Anderegg, Niels
Publisher: name: Zenodo
Year: 2020
Subjects: Führung
Führungskompetenz
Leadership
Schule führen
Schulführung
Teacher
Teacher Leadership

description: In modernen Schulen wird Führung nicht von Einzelnen, sondern gemeinschaftlich gestaltet. Neben der Schulleitung übernehmen weitere Personen Führungsverantwortung für das Lernen aller Schülerinnen und Schüler. Aber wie funktioniert gemeinschaftliche Schulführung? Konzeptionelle, forschungsbasierte und praxisorientierte Beiträge aus Deutschland, Österreich, der Schweiz und dem englischen Raum bieten Schulfeld, Behörden und Wissenschaft einen Überblick über Formen, Zugänge und offene Fragen. → Zugang zum Volltext des gesamten Sammelbands innerhalb des PH-Netzwerks mit diesem Link
description: +repphzhbib2020W
Lessons on early structure formation from a mature galaxy cluster observed at cosmic noon
Creators: name: Liu, Boyuan
name: Schauer, Anna T. P.
name: Bromm, Volker
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We demonstrate a new approach of indirectly constraining both early star and structure formation via mature galaxy clusters at cosmic noon (z~2), using the cluster XLSSC 122 as an example. With the standard Press Schechter formalism, we infer a rapid evolution of the star formation efficiency (the ratio of stellar to halo mass) from 10^-4 to 0.01 during z~20-13, based on the age distribution of stars in post-starburst galaxies of XLSSC 122, measured by HST photometry assuming no dust extinction. Here, we consider all low-mass haloes, including minihaloes, that host the first stars and galaxies (5*10^5 Msun < M_halo < 10^10 Msun). We also place new constraints on fuzzy dark matter models of m_a < 5*10^-21 eV/c^2 for the ultra-light boson mass, from the abundance of galaxies with star formation at z > 13 in XLSSC 122. Our exploratory results are consistent with existing constraints. More comprehensive results will be obtained if our approach is extended to a large sample of clusters or field post-starburst galaxies at cosmic noon, with improved modelling of halo and stellar populations.
description: 7 pages, 5 figures, accepted for publication in MNRAS
Large Scale Agriculture Sector Price Endogenous MP Modeling with E,V Risk
Creators: name: House, Robert M.
name: House, Robert M.
Publisher: name: Unknown
Year: 1983
Subjects: Demand and Price Analysis
Risk and Uncertainty

description: A U.S. agriculture sector regional, spatial equilibrium model incorporating E,V risk is presented. It is formulated and solved in direct nonlinear programming fashion. Nonlinear and linear approximation procedures are compared regarding simplicity, flexibility and cost. Example results are presented for risky and riskless simulations of increasing crop export demand.
Lepturgantes candicans
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Lepturgantes
Lepturgantes candicans

description: 1. Lepturgantes candicans (Bates, 1863)
Type locality — Brazil, Amazonas: Ega [Tefé]. (MNHN). Distribution — Brazil (Amazonas, Mato Grosso).
 Lepturges candicans Bates, 1863: 371.
 Lepturgantes candicans; Monné, 1977: 708, fig. 19.
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
The caspian sea and anthropogenic sound: a need for underwater sound assessment
Creators: name: Sabet, Saeed Shafiei
Publisher: name: figshare
Year: 2021
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Biological Techniques
subject: 60299 Ecology not elsewhere classified

description: The Caspian Sea is a brackish-water habitat and the biggest lake in the world, which is entirely closed by land. Sound-generating human activities so-called anthropogenic sound have elevated ambient sound levels in the aquatic environment. Sound-generating human activities such as shipping and recreational activities, seismic exploration, sonars and pule driving have introduced sounds in the aquatic environment that vary in terms of temporal, spatial and structural patterns. Aquatic organisms including invertebrates, fishes and mammals may use sounds to communicate with conspecifics, detect prey and avoid predators in their natural habitats. They may also be affected through deterrence, disturbance and masking. However, to our knowledge, yet there are no investigations to assess underwater sound sources, soundscape, and the potential impacts of anthropogenic sound among taxa in the Caspian Sea. It can be suggested that we need to prioritize acoustic studies both to understand soundscape and bioacoustics criteria in the Caspian Sea but also to assess the potential impacts of sounds on aquatic species in captivity under laboratory conditions and in the field at individual and at the community levels.