cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Probabilistic purification of noisy coherent states
Creators: name: Marek, Petr
name: Filip, Radim
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A basic feasible probabilistic purification of unknown noisy coherent states, outgoing from different state preparations with unknown mean number of thermal photons, is proposed. The scheme is based only on a linear-optical network with an avalanche photo-diode or heterodyne (homodyne) detection used to post-select a successful processing. The suggested probabilistic method can produce an output state with a lower noise than both quantum deterministic and classical probabilistic distillation method. The purification applied in the state preparation can increase classical capacity of communication and security of quantum key distribution.
description: 11 pages, 4 figures, typo in the abstract corrected
Time lags in Narrow-line Seyfert 1 galaxies and the origin of their soft excess emission
Creators: name: Dewangan, G. C.
name: Griffiths, R. E.
name: Rao, A. R.
name: Dasgupta, Surajit
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The origin of soft X-ray excess emission from type 1 active galactic nuclei has remained a major problem for the last two decades. It has not been possible to distinguish alternative models for the soft excess emission despite the excellent data quality provided by XMM-Newton and Chandra. Here we present observations of time lags between the soft and hard band X-ray emission and discuss the implications to the models for the soft excess. We also device a method to distinguish the models for the soft excess using Suzaku's broadband capability.
description: 4 pages, To appear in the conference proceedings "The Extreme Universe in the Suzaku Era" (Progress of Theoretical Physics, Supplement)
Spatial and observational homogeneities of the galaxy distribution in standard cosmologies
Creators: name: Lemos, L. J. Rangel
name: Ribeiro, Marcelo B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work discusses the possible empirical verification of the geometrical concept of homogeneity of the standard relativistic cosmology considering its various definitions of distance. We study the physical consequences of the distinction between the usual concept of spatial homogeneity (SH), as defined by the Cosmological Principle, and the concept of observational homogeneity (OH), arguing that OH is in principle falsifiable by means of astronomical observations, whereas verifying SH is only possible indirectly. Simulated counts of cosmological sources are produced by means of a generalized number-distance expression that can be specialized to produce either the counts of the Einstein-de Sitter (EdS) cosmology, which has SH by construction, or other types of counts, which do, or do not, have OH by construction. Expressions for observational volumes and differential densities are derived with the various cosmological distance definitions in the EdS model. Simulated counts that have OH by construction do not always exhibit SH features. The reverse situation is also true. Besides, simulated counts with no OH features at low redshift start showing OH characteristics at high redshift. The comoving distance seems to be the only distance definition where both SH and OH appear simultaneously. The results show that observations indicating possible lack of OH do not necessarily falsify the standard Friedmannian cosmology, meaning that this cosmology will not necessarily always produce observable homogeneous densities. The general conclusion is that the use of different cosmological distances in the characterization of the galaxy distribution lead to significant ambiguities in reaching conclusions about the behavior of the large-scale galaxy distribution in the Universe.
description: 12 pages, 12 figures, LaTeX. Matches the final version sent to the journal. Accepted for publication in "Astronomy and Astrophysics"
Mapping and evaluating global urban entities (2000–2020): A novel perspective to delineate urban entities based on consistent nighttime light data
Creators: name: Shi, Kaifang
name: Wu, Yizhen
name: Liu, Shirao
name: Chen, Zuoqi
name: Huang, Chang
name: Cui, Yuanzheng
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Mental Health

description: The differences in the definition of urban areas lead to our contrasting or inconsistent understanding of global urban development and their corresponding socioeconomic and environmental impacts. The existing urban areas were widely identified by the boundaries of built-environment or social-connections, rather than urban entities that are essentially the spatial extents of human activity agglomerations. Thus, this study has attempted to map and evaluate global urban entities (2000–2020) from a perspective of an updated urban concept of urban entities based on the consistent remotely sensed nighttime light data. First, a K-means algorithm was developed to cluster urban and non-urban pixels automatically in consideration of global region division. Then, a post-processing was conducted to enhance the temporal and logical consistency of urban entities during the study period. Rationality assessment indicates that urban entities derived from remotely sensed nighttime light data more effectively reflect the spatial agglomeration extents of human activities than those of physical urban areas. Global urban entities increased from 157,733 km2 in 2000 to 470,632 km2 in 2020 accompanied by a differentiated urban expansion at global, continental, and national levels. Our study provides long-time series and fine-resolution datasets (500 m) and new research avenues for spatiotemporal analysis of global urban entity expansion with the improvement of the understanding of urbanization and the emergence of effective urban mapping theories and approaches.
Heavy Coronal Ions in the Heliosphere: I. Global Distribution of Charge-states of C, N, O, Mg, Si and S
Creators: name: Grzedzielski, S.
name: Wachowicz, M. E.
name: Bzowski, M.
name: Izmodenov, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: Investigate/Study de-charging of solar wind C, N, O, Mg, Si and S ions and assess fluxes of resulting ENA in the heliosphere. Methods: The model treats the heavy ions as test particles convected by (and in a particular case also diffusing through) a hydrodynamically calculated background plasma flow, from 1 AU to the termination shock (TS), to heliosheath (HS) and finally to heliospheric tail (HT). The ions undergo radiative and dielectronic recombinations, charge exchanges, photo- and electron impact ionizations with plasma particles, interstellar neutral atoms (calculated on a Monte-Carlo model) and solar photons. Results: Highly-charged heavy coronal ions flowing with the solar wind undergo successive de-ionizations, mainly in the heliosheath, leading to charge-states much lower than in the supersonic solar wind. If Coulomb scattering is the main ion energy loss mechanism, the end product of these deionizations are fluxes of ENA of ~1 keV/nucleon originating in the upwind heliosheath that for C, Mg, Si and S may constitute sources of pickup ions (PUI) significantly exceeding the interstellar supply. Conclusions: Discussed processes result in (i) distinct difference of ion charge q in the supersonic solar wind (approximately q >= +Z/2, Z = atomic number) compared to that in the HS (approximately 0 <= q <= +Z/2)), (ii) probable concentration of singly ionized atoms (q = +1) in the heliosheath towards the heliopause (HP) and in the HT, (iii) possible significant production of ENA in the HS offering natural explanation for production of PUI, and -- after acceleration at the TS -- anomalous cosmic rays (ACR) of species (like C, Mg, Si, S) unable to enter the heliospheric cavity from outside because of their total ionization in the local interstellar medium.
description: Reduced-resolution version, submitted to A&A; full resolution: http://articles.cbk.waw.pl/0printed/g/grzedzielski_etal08a.pdf. One figure corrected
Cephennium albericum CROISSANDEAU 1894
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Cephennium
Cephennium albericum

description: Cephennium albericum CROISSANDEAU, 1894
Iberian material examined by C. Besuchet (unpubl.): SPAIN: Cataluña: 2♂♂, 1♀, Collsacabra (coll. Besuchet, coll. Español); 1♂, Barcelona, Alella (coll. Español); 1♀, Gualba (coll. Español); 1♂, 3♀♀, Sierra de Montseny, leg. Zariquiey (coll. Español); 1♀, Tiana (coll. Español); 1♀, Taradell (coll. Español); 1♀, Capçanes, leg. Español (coll. Español); 1♂, Montserrat, leg. Coiffait (coll. Coiffait); 2♂♂, Gerona, Riells, leg. Español (coll. Besuchet, coll. Español); 6♂♂, Gerona, La Salut, leg. Molses (coll. Besuchet, coll. Español); 1♀, Ripoll, leg. Coiffait (coll. Coiffait); 1♂, La Junquera, leg. Comellini (coll. Besuchet); 3♂♂, locality illegible (coll. Besuchet, coll. Español).
OROUSSET (2017) reports this species from four localities in Gerona and Barcelona (Northeast Spain: Cataluña) and several localities in Pyrénées-Oriental (Southwest France). In addition to the material listed above, Besuchet (unpubl.) examined specimens from several localities in Pyrénées-Oriental. For illustrations of the male primary and secondary sexual characters see OROUSSET (2017).
description: Published as part of Assing, Volker, 2021, On the Cephennium fauna of the Iberian Peninsula and the Atlantic Islands (Coleoptera, Staphylinidae, Scydmaeninae), pp. 891-931 in Linzer biologische Beiträge 52 (2) on page 898, DOI: 10.5281/zenodo.5039032
The ZTF-BTS Type Ia supernovae luminosity function is consistent with a single progenitor channel for the explosions
Creators: name: Sharon, Amir
name: Kushnir, Doron
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We construct the Type Ia supernovae (SNe Ia) luminosity function (LF) using the Zwicky Transient Facility Bright Transient Survey (BTS) catalogue. While this magnitude-limited survey has an unprecedented number of objects, it suffers from large distance uncertainties and lacks an estimation of host extinction. We bypass these issues by calculating the intrinsic luminosities from the shape parameters of the light curve's $ g $ and $ r $ bands, with the luminosities calibrated from the well observed SNe Ia sample of the Carnegie Supernova Project, allowing us to construct, for the first time, the intrinsic LF of SNe Ia. We then use a novel tight relation between the color stretch and the synthesized $^{56}$Ni mass, $M_\mathrm{Ni56}$, to determine the $M_\mathrm{Ni56}$ distribution of SNe Ia. We find that the LFs are unimodal, with their peaks in line with previous results, but have a much lower rate of dim events and luminous events. We show that the features on top of the unimodal LF-derived distributions are all compatible with statistical noise, consistent with a single progenitor channel for the explosions. We further derive, for the first time, the SNe Ia distribution of host galaxy extinction, and find a mean selective extinction of $E(B-V)\approx0.1$ and a non-negligible fraction with large, $ >1\,\text{mag} $, extinction in the optical bands. The high extinction is typical for luminous SNe, supporting their young population origin.
description: 24 pages, 20 figures. Accepted for publication in MNRAS
title: „Bridging the gap“ – Zur Verringerung der Kluft zwischen allgemeinen Lehr-Lernmodellen und konkreter Unterrichtsgestaltung am Beispiel der Förderung dynamischer Problemlösekompetenz in der Biologie
Creators: name: Rieß, Werner
name: Mischo, Christoph
Publisher: name: Biologie Lehren und Lernen – Zeitschrift für Didaktik der Biologie
Year: 2017
Subjects: Problemlösen, Förderung von dynamischen Problemlösekompetenzen, kognitivistische Lernverfahren, konstruktivistische Lernverfahren, Problem-Based-Learning, Inquiry-based teaching, 4C/ID

description: Die Förderung naturwissenschaftsbezogener Problemlösekompetenz ist ein wichtiges Ziel der naturwissenschaftlichen Ausbildung an Schulen und Hochschulen. Wie aber können entsprechende Kompetenzen evidenzbasiert gefördert werden? Die Autoren referieren zunächst wichtige Merkmale und Konzepte des Problemlösens in naturwissenschaftlichen Kontexten, stellen anschließend Ansätze und Effekte eher instruktivistischer vs. konstruktivistischer Lehr-Lernverfahren zur Förderung von Problemlösefähigkeiten dar und diskutieren die empirische Befundlage kritisch. Auf der Basis vielfach empirisch bewährter Lehr-Lernprinzipien und in Anlehnung an ein Lehr-Lernmodell von Van Merriënboer (2013) entwickeln die Autoren ein Modell problemorientierten Lehrens und Lernens (MopoLL), das die Kluft zwischen bereichsübergreifenden und adressaten- sowie inhaltsunspezifischen Lehr-Lernmodellen einerseits und den Bedürfnissen praktisch Lehrender nach einer Konkretisierung für die Unterrichtsplanung andererseits überbrückt und als Ansatz zur evidenzbasierten Förderung dynamischer Problemlösekompetenz (zumindest) biologischer Inhalte gelten kann. Abschließend werden Desiderata für die weitere Forschung aufgezeigt.
description: Biologie Lehren und Lernen – Zeitschrift für Didaktik der Biologie, Bd. 20, Nr. 1 (2016)
Nonlocal explanation of stationary and nonstationary regimes in cascaded soliton pulse compression
Creators: name: Bache, M.
name: Bang, O.
name: Moses, J.
name: Wise, F. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study soliton pulse compression in materials with cascaded quadratic nonlinearities, and show that the group-velocity mismatch creates two different temporally nonlocal regimes. They correspond to what is known as the stationary and nonstationary regimes. The theory accurately predicts the transition to the stationary regime, where highly efficient pulse compression is possible.
description: 3 pages, 2 figures, published verison in Optics Letters. Contains revised equations, including an updated model
Leaf area index and aboveground biomass estimation of an alpine peatland with a UAV multi-sensor approach
Creators: name: Assiri, Marco
name: Sartori, Anna
name: Persichetti, Antonio
name: Miele, Cristiano
name: Faelga, Regine Anne
name: Blount, Tegan
name: Silvestri, Sonia
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Aboveground biomass (AGB) can serve as an indicator when estimating various biogeochemical processes in peatlands, an ecosystem which provides countless ecosystem services and plays a key role in climate regulation. While remote sensing has been extensively employed to assess AGB across vast areas in forested peatlands its application to small and treeless peatlands, which are typical of the alpine regions, has been limited. Due to the characteristics of peatlands, innovative approaches capable of capturing their fine-scale, highly heterogeneous and short-stature vegetation cover are needed. Likewise, other key requirements include an ability to overcome site accessibility barriers, cost-effective acquisition of datasets and minimizing damage of these protected habitats. Hence, the utilization of Unmanned Aerial Vehicles (UAVs) offers a viable means for mapping AGB in alpine peatlands. In this study, the AGB of the Val di Ciampo alpine peatland (Veneto Region, Italy) was estimated by combining datasets derived from in situ vegetation samples as well as UAV-based LiDAR, hyperspectral and RGB sensors. A limited number of vegetation samples were used to reduce the impact of the study on the ecosystem. The results indicate that a linear regression can model the relationship between AGB and Leaf Area Index (LAI) with a significant explanatory ability (R2 = 0.72; p < 0.001). Several indices derived from digital terrain model (DTM) morphologies, hyperspectral data, and orthophotos were tested using a multiple regression approach to determine their potential to enhance the model’s performance. Among these only the Double Difference (DD) index, derived from hyperspectral data, was found to slightly improve the model’s explanatory ability (R2 = 0.76). Overall, the findings of this study suggest that UAV LiDAR data provides the most reliable solution for estimating AGB in alpine peatlands, while the inclusion of hyperspectral data provides only a minor improvement in accuracy.
Inside Green Process of food by-products: Alternative extraction and precipitation of bioactives
Creators: name: Coscueta, Ezequiel R.
name: Pintado, Manuela
Publisher: name: Zenodo
Year: 2019
Subjects: Aqueous two-phase systems
Downstream process
Biological pprecipitation
Alternative extraction
Green process

description: Centre for Biotechnology and Fine Chemistry (Universidade Católica Portuguesa) institutional research seminar, Biotalk
Cephennium silvai CASTELLINI 2011
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Cephennium
Cephennium silvai

description: Cephennium silvai group
This group includes C. silvai from Portugal and at least one undescribed species from Alicante (Spain). It is distinguished from other groups recorded from the Iberian Peninsula by a small, slender, moderately convex (cross-section), and bicoloured body, elytra with distinct and long supra-humeral carinae, unmodified male protibiae, and a robust aedeagus with large, but weakly sclerotized internal structures and with thin parameres apically reaching the apex of the median lobe and with short apical seta.
description: Published as part of Assing, Volker, 2021, On the Cephennium fauna of the Iberian Peninsula and the Atlantic Islands (Coleoptera, Staphylinidae, Scydmaeninae), pp. 891-931 in Linzer biologische Beiträge 52 (2) on page 898, DOI: 10.5281/zenodo.5039032
Characterisation of signal-induced noise in Hamamatsu R11265 Multianode Photomultiplier Tubes
Creators: name: Andreotti, M.
name: Capelli, S.
name: Cavallero, G.
name: Chiozzi, S.
name: Ramusino, A. Cotta
name: D'Ambrosio, C.
name: Fiorini, M.
name: Franzoso, E.
name: Frei, C.
name: Gallorini, S.
name: Gambetta, S.
name: Giugliano, C.
name: Gotti, C.
name: Gys, T.
name: Keizer, F.
name: Maino, M.
name: Malecki, B.
name: Minzoni, L.
name: Mitchell, S.
name: Neri, I.
name: Petrolini, A.
name: Piedigrossi, D.
name: Robertson, G.
name: Sergi, A.
name: Simi, G.
name: Slazyk, I.
name: Smith, M.
name: Webster, J.
name: Wotton, S. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Signal-induced noise is observed in Hamamatsu R11265 Multianode Photomultiplier Tubes, manifesting up to several microseconds after the single photoelectron response signal and localised in specific anodes. The mean number of noise pulses varies between devices, and shows significant dependence on the applied high-voltage. The characterisation of this noise and the mitigation strategies to perform optimal single-photon counting at 40 MHz, as required by the LHCb Ring-Imaging Cherenkov detectors, are reported.
Identities for hyperelliptic P-functions of genus one, two and three in covariant form
Creators: name: Athorne, Chris
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H45; 14H10

description: We give a covariant treatment of the quadratic differential identities satisfied by the P-functions on the Jacobian of smooth hyperelliptic curves of genera 1, 2 and 3.
Two timescale analysis of extreme mass ratio inspirals in Kerr. I. Orbital Motion
Creators: name: Hinderer, Tanja
name: Flanagan, Eanna E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Inspirals of stellar mass compact objects into massive black holes are an important source for future gravitational wave detectors such as Advanced LIGO and LISA. Detection of these sources and extracting information from the signal relies on accurate theoretical models of the binary dynamics. We cast the equations describing binary inspiral in the extreme mass ratio limit in terms of action angle variables, and derive properties of general solutions using a two-timescale expansion. This provides a rigorous derivation of the prescription for computing the leading order orbital motion. As shown by Mino, this leading order or adiabatic motion requires only knowledge of the orbit-averaged, dissipative piece of the self force. The two timescale method also gives a framework for calculating the post-adiabatic corrections. For circular and for equatorial orbits, the leading order corrections are suppressed by one power of the mass ratio, and give rise to phase errors of order unity over a complete inspiral through the relativistic regime. These post-1-adiabatic corrections are generated by the fluctuating piece of the dissipative, first order self force, by the conservative piece of the first order self force, and by the orbit-averaged, dissipative piece of the second order self force. We also sketch a two-timescale expansion of the Einstein equation, and deduce an analytic formula for the leading order, adiabatic gravitational waveforms generated by an inspiral.
description: 40 pages, 4 figures, revtex format. Corrected error in interpretation of previous work. Discussion of utility of adiabatic templates expanded
Sclerophrys maculata
Creators: name: Ceríaco, L. M. P.
name: De Sá, S.
name: Bandeira, S.
name: Valério, H.
name: Stanley, E. L.
name: Kuhn, A. L.
name: Marques, M. P.
name: Vindum, J. V.
name: Blackburn, D. C.
name: Bauer, A. M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Anura
Bufonidae
Sclerophrys
Sclerophrys maculata

description: HALLOWELL’S TOAD
Sclerophrys maculata (Hallowell, 1854)
MATERIAL.— Leba Pass, between river and highway, 5 December 2013, 15º04ʹ13.2ʺS, 13º14ʹ37.7ʺE, 1676 m (CAS 254877–254878).
COMMENTS.— In Angola this species mostly occurs in the southwestern provinces of Namibe, Benguela, Bié, and Huíla (Marques 2015). The nearest records are in “Cainde” and “ 16 km W of Vila Nova” (Poynton and Haacke 1993; Ruas 1996, 2002). It is widespread in arreas to the south, including much of northern Namibia (du Preez and Carruthers 2009). Ohler and Dubois (2016) recently presented evidence identifying the type species of Sclerophrys Tschudi, 1838 as referable to Bufo rangeri Hewitt, 1935, thus making Sclerophrys the oldest available name for the clade of African toads recently referred to as Amietophrynus Frost et al., 2006.
description: Published as part of Ceríaco, L. M. P., De Sá, S., Bandeira, S., Valério, H., Stanley, E. L., Kuhn, A. L., Marques, M. P., Vindum, J. V., Blackburn, D. C. & Bauer, A. M., 2016, Herpetological Survey of Iona National Park and Namibe Regional Natural Park, with a Synoptic List of the Amphibians and Reptiles of Namibe Province, Southwestern Angola, pp. 15-61 in Proceedings of the California Academy of Sciences 63 (2) on page 19, DOI: 10.5281/zenodo.11066801
All at Sea: Addressing Information Anxiety in students embarking on research at third level
Creators: name: Róisín Mee
Publisher: name: Zenodo
Year: 2022

description: The purpose of this paper is to gain understanding of how negative affective factors such as confusion, doubt and shame students’ impact students’ ability to engage with research when they begin learning at third level so that faculty and academic libraries can better plan information literacy instruction and student outreach
A combinatorial approach to functorial quantum sl(k) knot invariants
Creators: name: Mazorchuk, Volodymyr
name: Stroppel, Catharina
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 17B10, 57M27, 05E10,81R50

description: This paper contains a categorification of the sl(k) link invariant using parabolic singular blocks of category O. Our approach is intended to be as elementary as possible, providing combinatorial proofs of the main results of Sussan. We first construct an exact functor valued invariant of webs or 'special' trivalent graphs labelled with 1, 2, k-1, k satisfying the MOY relations. Afterwards we extend it to the sl(k)-invariant of links by passing to the derived categories. The approach using foams appears naturally in this context. More generally, we expect that our approach provides a representation theoretic interpretation of the sl(k)-homology, based on foams and the Kapustin-Lie formula. Conjecturally this implies that the Khovanov-Rozansky link homology is obtained from our invariant by restriction.
description: 29 pages, including several pictures
Amietia angolensis
Creators: name: Ceríaco, L. M. P.
name: De Sá, S.
name: Bandeira, S.
name: Valério, H.
name: Stanley, E. L.
name: Kuhn, A. L.
name: Marques, M. P.
name: Vindum, J. V.
name: Blackburn, D. C.
name: Bauer, A. M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Anura
Pyxicephalidae
Amietia
Amietia angolensis

description: ANGOLA RIVER FROG
Amietia angolensis (Bocage, 1866)
MATERIAL.— Leba Pass, between river and highway, 5 December 2013, 15º4ʹ12.2ʺS, 13º14ʹ38.9ʺE, 1676 m (CAS 254876).
COMMENTS.— This specimen represents the first record for the species for the province, although there are several records from the province of Huíla, in Boca de Humpata (Laurent 1964a; Ruas 1996; Channing and Baptista 2013), and Huila (Bocage 1895; Themido 1941; Perret 1976; Ruas 1996, 2002) less than 20 km east of Leba Pass. The species is widespread across the rest of the country (Marques 2015) as well as in much of the more mesic areas of southern Africa. In Namibia it occurs only where there are permanent rivers (du Preez and Carruthers 2009).
description: Published as part of Ceríaco, L. M. P., De Sá, S., Bandeira, S., Valério, H., Stanley, E. L., Kuhn, A. L., Marques, M. P., Vindum, J. V., Blackburn, D. C. & Bauer, A. M., 2016, Herpetological Survey of Iona National Park and Namibe Regional Natural Park, with a Synoptic List of the Amphibians and Reptiles of Namibe Province, Southwestern Angola, pp. 15-61 in Proceedings of the California Academy of Sciences 63 (2) on page 20, DOI: 10.5281/zenodo.11066801
Low Mass Dimuons Produced in Relativistic Nuclear Collisions
Creators: name: Ruppert, Jorg
name: Gale, Charles
name: Renk, Thorsten
name: Lichard, Peter
name: Kapusta, Joseph I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The NA60 experiment has measured low-mass muon pair production in In-In collisions at 158 A GeV with unprecedented precision. We show that this data is reproduced very well by a dynamical model with parameters scaled from fits to measurements of hadronic transverse mass spectra and Hanbury-Brown and Twiss correlations in Pb-Pb and Pb-Au collisions at the same energy. The data is consistent with in-medium properties of $ρ$ and $ω$-mesons at finite temperature and density as deduced from empirical forward-scattering amplitudes. Inclusion of the vacuum decay of the $ρ$-meson after freeze-out is necessary for an understanding of the mass and transverse momentum spectrum of dimuons with $M \apprle 0.9 {\rm GeV}/c^2$.
description: 4 pages, 3 figures, updated hadronic analysis
The ChPT: top-down and bottom-up
Creators: name: Kampf, Karol
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, higher-derivative corrections of the non-linear sigma model of both even and odd intrinsic-parity sectors are systematically studied, focusing on ordered amplitudes of flavor scalars in massless limit. It should correspond to a theory known as Chiral perturbation theory (ChPT) without external sources and with only single-trace operators. We briefly overview its formal development and apply new S-matrix methods to its amplitude constructions. The bottom-up analysis of the tree-level amplitudes of different orders and multiplicities focuses on the formal structure of general ChPT. Possible theoretical simplifications based on the Kleiss-Kuijf and Bern-Carrasco-Johansson relations are presented. Finally, in the same context, the comparison with the so-called Z-function, which is connected with string theory, is also discussed.
description: 35 pages, 9 figures, v2: new subsection added (O(p10) order), v3: minor changes, accepted for publication in JHEP
Landslide detection using Synthetic Aperture Radar and Multispectral imagery
Creators: name: Mozafar Amiri, Nasim
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 370599
subject: Geology not elsewhere classified
classificationCode: 370903
subject: Natural hazards

description: Earth Data Analytics Certificate student from the 2022-2023 cohort, Nasim Mozafar Amiri, focused his final project on landslide detection using synthetic aperture radar and multispectral imagery.
Upper critical field in noncentrosymmetric superconductors
Creators: name: Samokhin, K. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We calculate the upper critical field in superconductors without inversion symmetry at arbitrary temperatures, in the presence of scalar impurities. Both orbital and spin (paramagnetic) mechanisms of pair breaking are considered. The superconducting phase transition at nonzero field occurs into a helical vortex state, in which the order parameter is modulated along the applied field (in a cubic crystal). The helical state is stable with respect to disorder. However, if the difference between the densities of states in the electron bands split by spin-orbit coupling is neglected, then the order parameter modulation is present only at low temperatures, and only if the system is sufficiently clean and paramagnetically limited. This state resembles the Larkin-Ovchinnikov-Fulde-Ferrell state in centrosymmetric superconductors.
description: 13 REVTeX pages, 7 figures
Tomopterna damarensis Dawood and Channing 2002
Creators: name: Ceríaco, L. M. P.
name: De Sá, S.
name: Bandeira, S.
name: Valério, H.
name: Stanley, E. L.
name: Kuhn, A. L.
name: Marques, M. P.
name: Vindum, J. V.
name: Blackburn, D. C.
name: Bauer, A. M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Anura
Pyxicephalidae
Tomopterna
Tomopterna damarensis

description: DAMARALAND SAND FROG
Tomopterna damarensis Dawood and Channing, 2002
MATERIAL.— Pediva Hot Springs, 2 December 2013, 16º17ʹ4.62ʺS, 12º33ʹ47.86ʺE, 241 m (CAS 254855).
COMMENTS.— The specimen was collected by locals on the border of the largest pond at Pediva Springs. The lower jaw is broken, but the specimen is otherwise in good condition. A dark pigmentation is visible along the jaw-line, which identifies the specimen as a male, as is common in the genus. Comparing our specimen to the recently described Tomopterna damarensis Dawood and Channing, 2002, from Damaraland, northwestern Namibia, it agrees with the smooth dorsum and most important morphological characters. Comparison of 16S mtDNA sequence to the type specimen confirms the identification of this specimen as T. damarensis (GenBank KU662310; p-distance from GenBank AY255091.1, the holotype of T. damarensis, is 0.7 %). Additional details on the distribution of the species in Angola and Namibia are being prepared for publication (M. Heinicke et al., in prep.). This is the first record of the species for the country, extending the range of the species considerably northwards from the type locality at Khorixas, Namibia (Dawood and Channing 2002).
description: Published as part of Ceríaco, L. M. P., De Sá, S., Bandeira, S., Valério, H., Stanley, E. L., Kuhn, A. L., Marques, M. P., Vindum, J. V., Blackburn, D. C. & Bauer, A. M., 2016, Herpetological Survey of Iona National Park and Namibe Regional Natural Park, with a Synoptic List of the Amphibians and Reptiles of Namibe Province, Southwestern Angola, pp. 15-61 in Proceedings of the California Academy of Sciences 63 (2) on page 20, DOI: 10.5281/zenodo.11066801
Phases and magnetization process of an anisotropic Shastry-Sutherland model
Creators: name: Meng, Zi Yang
name: Wessel, Stefan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We examine ground state properties of the spin-1/2 easy-axis Heisenberg model on the Shastry-Sutherland lattice with ferromagnetic transverse spin exchange using quantum Monte Carlo and degenerate perturbation theory. For vanishing transverse exchange, the model reduces to an antiferromagnetic Ising model that besides Neel order harbors regions of extensive ground state degeneracy. In the quantum regime, we find a dimerized phase of triplet states, separated from the Neel ordered phase by a superfluid. The quantum phase transitions between these phases are characterized. The magnetization process shows a magnetization plateau at 1/3 of the saturation value, that persists down to the Ising limit, and a further plateau at 1/2 only in the quantum regime. For both plateaus, we determine the crystalline patterns of the localized triplet excitations. No further plateaus nor supersolid phases are found in this model.
description: 13 pages, 19 figures
title: Territorial Science Echo
title: Beschäftigung und wirtschaftliche Entwicklung in der Großregion
titleType: Subtitle
Creators: name: Belkacem, Rachid
name: Dörrenbacher, Peter
name: Pigeron-Piroth, Isabelle
Publisher: name: Trier University
Year: 2019
Subjects: subject: Grenzgebiet
subject: Luxemburg
subject: Deutschland
subject: Belgien
subject: Frankreich
subject: Arbeitnehmer
subject: internationaler Verkehr
subject: grenzüberschreitende Kooperation
subject: border area
subject: Germany
subject: France
subject: Belgium
subject: employee
subject: international traffic
subject: cross-border cooperation

description: Das Working Paper beleuchtet den Themenbereich Beschäftigung und wirtschaftliche Entwicklung und arbeitet Herausforderungen für die Raumentwicklung der Großregion ab. Insbesondere legt es einen Fokus auf die Industriegeschichte sowie die Beschäftigung und grenzüberschreitende Arbeit in der Großregion.
The Effect of the Interstellar Model on Star Formation Properties in Galactic Disks
Creators: name: Tasker, Elizabeth J.
name: Bryan, Greg L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We studied the effect of interstellar gas conditions on global galaxy simulations by considering three different models for the ISM. Our first model included only radiative cooling down to 300 K, our second model added an additional background heating term due to photoelectric heating, and our third model uses an isothermal equation of state with a temperature of 10^4 K and no explicit heating or cooling. Two common prescriptions for star formation are implemented in each case. The first is based on cosmological simulations with a low threshold for star formation but also a low efficiency. The second assumes stars form only in high density regions but with a higher efficiency. We also explore the effects of including feedback from type II supernovae. We find that the different ISM types produce marked differences in the structure of the disk and temperature phases present in the gas, although inclusion of feedback largely dominates these effects. In particular, size of the star-forming clumps was increased both by background heating and by enforcing an isothermal ISM. We also looked at the one dimensional profiles and found that a lognormal PDF provides a good fit for all our simulations over several orders of magnitude in density. Overall, despite noticeable structural differences, the star formation properties in the disk are largely insensitive to ISM type and agree reasonably well with observations.
description: To be published in ApJ, in press. 20 pages, 17 figures
Planetary Nebulae in Gaia EDR3: Central Star identification, properties and binarity
Creators: name: González-Santamaría, I.
name: Manteiga, M.
name: Manchado, A.
name: Ulla, A.
name: Dafonte, C.
name: Varela, P. López
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. Gaia Early Data Release 3 (EDR3), published in December 2020, features improved photometry and astrometry over that published in the previous DR2 file, and includes a substantially larger number of sources, of the order of 2,000 million, making it a paradigm of Big data Astronomy. Aims. We demonstrate how Gaia data mining can effectively help to solve the issue of central star misidentification, a problem that has plagued the field since its origin. As we did for DR2, our objective is to present a catalogue of CSPNe with astrometric and photometric information in EDR3. Methods. Gaia G(BP)-G(RP) colours allow us to select the sources with sufficient temperatures to ionize the nebula. In order to estimate the real colour of a source, it is important to take into account interstellar extinction and, in the case of compact nebulae, nebular extinction when available. In addition, distances derived from EDR3 parallaxes (combined with consistent literature values) can be used to obtain nebular intrinsic properties from those observed. With this information, CSPNe can be plotted in an HR diagram. Results. We present a catalogue of 2035 PNe with their corresponding CS identification from among Gaia EDR3 sources. We obtain the distances for those with known parallaxes in EDR3 (1725 PNe). In addition, for a subsample (405 PNe) with the most accurate distances, we obtain different nebular properties such as their Galactic distribution, radius, kinematic age and morphology. Furthermore, for a set of 74 CSPNe, we present the evolutionary state (mass and age) derived from their luminosities and effective temperatures from evolutionary models. Finally, we highlight the detection of several wide binary CSPNe through an analysis of the EDR3 astrometric parameters, and we contribute to shedding some light on the relevance of close binarity in CSPNe.
description: Category: Solar and Stellar Astrophysics
Toward Forecasting Volcanic Eruptions using Seismic Noise
Creators: name: Brenguier, Florent
name: Shapiro, Nikolai M.
name: Campillo, Michel
name: Ferrazzini, Valerie
name: Duputel, Zacharie
name: Coutant, Olivier
name: Nercessian, Alexandre
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: During inter-eruption periods, magma pressurization yields subtle changes of the elastic properties of volcanic edifices. We use the reproducibility properties of the ambient seismic noise recorded on the Piton de la Fournaise volcano to measure relative seismic velocity variations of less than 0.1 % with a temporal resolution of one day. Our results show that five studied volcanic eruptions were preceded by clearly detectable seismic velocity decreases within the zone of magma injection. These precursors reflect the edifice dilatation induced by magma pressurization and can be useful indicators to improve the forecasting of volcanic eruptions.
description: Supplementary information: http://www-lgit.obs.ujf-grenoble.fr/~fbrengui/brenguier_SI.pdf Supplementary video: http://www-lgit.obs.ujf-grenoble.fr/~fbrengui/brenguierMovieVolcano.avi
From Quantum Field Theory to Quantum Mechanics
Creators: name: Sá, Nuno Barros e
name: Gomes, Cláudio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct the algebra of operators acting on the Hilbert spaces of Quantum Mechanics for systems of $N$ identical particles from the field operators acting in the Fock space of Quantum Field Theory by providing the explicit relation between the position and momentum operators acting in the former spaces and the field operators acting on the latter. This is done in the context of the non-interacting Klein-Gordon field. It may not be possible to extend the procedure to interacting field theories since it relies crucially on particle number conservation. We find it nevertheless important that such an explicit relation can be found at least for free fields. It also comes out that whatever statistics the field operators obey (either commuting or anticommuting), the position and momentum operators obey commutation relations. The construction of position operators raises the issue of localizability of particles in Relativistic Quantum Mechanics, as the position operator for a single particle turns out to be the Newton-Wigner position operator. We make some clarifications on the interpretation of Newton-Wigner localized states and we consider the transformation properties of position operators under Lorentz transformations, showing that they do not transform as tensors, rather in a manner that preserves the canonical commutation relations.
description: 18 pages, 1 figure
Isolation of a cell surface antigen specific for human acute myelogenous leukemia cells
Creators: name: Shipman, Robert Charles
Publisher: name: University of British Columbia
Year: 2010

description: Methods are described whereby three protein bands (#1, #2 and #3), apparently unique to cells of patients with acute myelogenous leukemia (AML), were isolated on non-reducing poly-acrylamide gels. Antisera raised against all three proteins demonstrated absolute specificity, in the ELISA, for absorbed cell membrane preparations from cells of patients with AML and did not react with comparable cell membrane preparations from cells of normal individuals or those of patients with lympho-proliferative disorders. Inhibition studies showed that AML band #1 (68,000 dalton molecular weight) material was capable of totally inhibiting the reaction, in the ELISA, of all three antisera (anti-AML #1, #2 and #3) with absorbed AML cell membrane preparations. When AML cell membranes were examined in SDS-PAGE, only material identified as AML band #1 was detectable, indicating that AML bands #2 and #3 represented aggregates of AML band #1 or artifacts of non-reducing PAGE and the cell membrane preparative procedures. AML band #1 material was shown to be homogenous by two-dimensional gel electrophoresis with a molecular weight of 68,000 daltons and a mean pI of 7.16. AML band #1 material was also shown to be capable of inhibiting the reaction of anti-AML #1 antiserum with the promyelocytic cell line HL-60, as demonstrated by FACS IV analysis, whereas material from normal cell membranes could not demonstrate this inhibition.
Phrynomantis annectens Werner, Mutiambo 1910
Creators: name: Ceríaco, L. M. P.
name: De Sá, S.
name: Bandeira, S.
name: Valério, H.
name: Stanley, E. L.
name: Kuhn, A. L.
name: Marques, M. P.
name: Vindum, J. V.
name: Blackburn, D. C.
name: Bauer, A. M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Anura
Microhylidae
Phrynomantis
Phrynomantis annectens

description: MARBLED RUBBER FROG – Fig. 2
Phrynomantis annectens Werner, 1910
MATERIAL.— Omauha Lodge, 3 December 2013, 16º11ʹ55.4ʺS, 12º24ʹ0.3ʺE, 338 m (CAS 255056).
COMMENTS.— Both this specimen and another now in the INBAC collections were collected inside a toilet water tank, one of few available sources of standing water in the area. These specimens represent the fourth record for the species in the country. The species reaches its northern distribution in Angola, in Novo Redondo/Gabela, Kwanza Sul Province (Poynton and Haacke 1993). Phrynomantis annectens has previously been recorded from the Mutiambo River and Caraculo in Namibe Province (Poynton and Haacke 1993). The current records represent the southernmost known distribution of the species in Angola, however it is common in Namibia and South Africa (Channing 2001; du Preez and Carruthers 2009) and is likely to occur throughout the province wherever water is available.
description: Published as part of Ceríaco, L. M. P., De Sá, S., Bandeira, S., Valério, H., Stanley, E. L., Kuhn, A. L., Marques, M. P., Vindum, J. V., Blackburn, D. C. & Bauer, A. M., 2016, Herpetological Survey of Iona National Park and Namibe Regional Natural Park, with a Synoptic List of the Amphibians and Reptiles of Namibe Province, Southwestern Angola, pp. 15-61 in Proceedings of the California Academy of Sciences 63 (2) on page 20, DOI: 10.5281/zenodo.11066801
ZAMONAVIY DASTURLASH TILLARINING QIYOSIY TAHLILI
Creators: name: Farmonov Sherzodbek Raxmonjonovich, Farg'ona davlat unversiteti amaliy matematika va informatika kafedrasi katta
name: Alijonov Abdujabbor Ravshanbek o'g'li, Farg'ona davlat universiteti 2-kurs talabasi
Publisher: name: Zenodo
Year: 2023

description: Microsoft  tomonidan  ishlab  chiqarilgan  C#  til ma'lumotnomasi C# dasturlash tili uchun keng qamrovli va vakolatli hujjat bo'lib xizmat  qiladi.  Hujjat  asosiy  til  konstruksiyalari,  sintaksis  qoidalari  va  asosiy xususiyatlarni  o'z  ichiga  oladi,  bu  uni  yangi  boshlanuvchilar  va  tajribali  C# dasturchilari  uchun  muhim  manbaga  aylantiradi.  Ma'lumotnoma  muntazam ravishda  yangilanib  turadi,  u  eng  so'nggi  til  yaxshilanishlari  va  eng  yaxshi amaliyotlarni  aks  ettiradi.  Uning  aniq  tashkil  etilishi  va  keng  ko‘lamli  misollari .NET platformasida ilovalarni ishlab chiqish uchun C# tilining nozik tomonlarini tushunishga  intilayotgan  ishlab  chiquvchilar  uchun  qimmatli  manba  bo‘lib, foydalanish  imkoniyatiga  hissa  qo‘shadi.  Til  yaratuvchisining  rasmiy  manbasi sifatida  ushbu  ma'lumotnoma  uning  to'g'riligi  va  ishonchliligiga  ishonch  hosil qiladi va C# dasturlash bilan shug'ullanuvchilar uchun asosiy qo'llanma bo'ladi.