cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Extending the GTAP framework for public procurement analysis
Creators: name: Aguiar, Angel
name: Carrico, Caitlyn
name: Hertel, Thomas
name: Hussein, Zekarias
name: McDougall, Robert
name: Narayanan, Badri
name: Aguiar, Angel
name: Carrico, Caitlyn
name: Hertel, Thomas
name: Hussein, Zekarias
name: McDougall, Robert
name: Narayanan, Badri
Publisher: name: Unknown
Year: 2016
Subjects: subject: International Relations/Trade
subject: Government austerity
subject: Multilateral trade negotiations
subject: Non-Tariff barriers
subject: Non-Tariff measures in services
subject: Trade in services
subject: The GTAP Data Base and extensions

description: This paper extends the GTAP framework to aid in the analysis of changes to public procurement policies. In terms of data developments, government investment demand data is estimated for each of the 57 GTAP Commodities in the 140 regions of version 9. In addition, the origin of imports by end use (i.e., for firms, private consumption, government consumption, and investment) is determined following the recent literature. Another layer of valuation is also introduced, which captures the preferences towards domestic production. In terms of model extensions, there is a new nest in the production structure that allows for different procurement regimes, and the origin of imports by agents end use is incorporated. We illustrate this framework by simulating the impact of a hypothetical reduction in the domestic preference in one of the newly introduced procurement regimes. Future work should focus on estimation of these domestic preference margins
Impacts of Possible Chinese Protection on US Soybeans
Creators: name: Taheripour, Farzad
name: Tyner, Wallace E.
name: Taheripour, Farzad
name: Tyner, Wallace E.
Publisher: name: Unknown
Year: 2018
Subjects: International Relations/Trade

description: China is the world largest soybean importer and imported 93.5 Million Metric Tons (MMT) of soybeans in 2016, about 65% of global soybean imports. China imports soybeans mainly from Brazil, US, and Argentina. The shares of these three countries in China's imports were about 44%, 42%, and 9% in 2016. Canada, Uruguay, and Russia also export soybeans to China. The shares of these countries in total Chinese soybean imports were about 2.1%, 1.9% and 0.5% in 2016, respectively.
The study of the charged top-pion decay processes
Creators: name: Wang, Xuelei
name: Xu, Wenna
name: Du, Linlin
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the framework of top-color assisted technicolor(TC2) theory, we study the four decay processes of charged top-pion, i.e., $Π^{+}_{t}\to t\bar{b}$, $Π^{+}_{t}\to c\bar{b}$, $Π^{+}_{t}\to W^{+}γ$, $Π^{+}_{t}\to W^{+}Z^{0}$, the decay branching ratio of these modes are calculated. The results show that the main decay channels of charged top-pion are the tree level modes: $Π_t^+ \to t\bar{b}$ and $Π_t^+ \to c\bar{b}$. Light $Π_t^+$ is easier to be detected than heavy one at future coliders. So, the study provides us some useful information to search for charged top-pion.
description: 14 pages, 6 figures
How U.S. Agriculture Will Fare Under the USMCA and Retaliatory Tariffs
Creators: name: Chepeliev, Maksym
name: Tyner, Wallace E.
name: Va Der Mensbrugghe, Dominique
name: Chepeliev, Maksym
name: Tyner, Wallace E.
name: Va Der Mensbrugghe, Dominique
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Agricultural policies
subject: Non-Tariff barriers
subject: The GTAP Data Base and extensions
subject: North America

description: A hallmark of the Trump Administration has been to reverse the post-World War II consensus on lowering of trade barriers and a commitment towards multilateral free trade, towards a more protectionist and perhaps mercantilist position vis-Ã -vis trade policy. One of the Administration's first actions in this regard was the decision to leave the Trans-Pacific Partnership (TPP) agreement, followed thereafter by raising tariffs on steel and aluminum imports. President Trump left no doubt where he stood on the North American Free Trade Agreement (NAFTA), which he often stated was the "worst trade deal maybe ever signed anywhere". The administration's actions on trade are likely to have significant implications for U.S. farmers as these actions target three of the largest markets for U.S. agricultural exports ”Canada, China and Mexico accounting" for some 44% of U.S. agricultural exports representing an average of $63 billion from 2013 to 2015.
Tom Hertel’s influence and its lessons about academic inquiry
Creators: name: Hillberry, Russell
name: Hummels, David
name: Hillberry, Russell
name: Hummels, David
Publisher: name: Unknown
Year: 2018
Subjects: subject: Teaching/Communication/Extension/Profession
subject: The GTAP Data Base and extensions

description: Fields of academic inquiry differ in their preferred forms of output, in the ways in which knowledge is accumulated and stored, and so in the ways that academic influence is measured. We compare Tom Hertelâ€™s research record to other international economists of his generation in order to illustrate the unique breadth and influence of his work, and of the GTAP project broadly. We then provide an analytical framework that helps explain the evolution of the field of international economics from a tool-use standpoint. This framework helps us to assess the academic productivity gains from creating the GTAP model and consortium. It also provides a possible answer to a significant puzzle: why is GTAP increasingly influential in the physical and biological sciences, but less so within the international economics community?
Pressure-induced superconductivity and topological phase transitions in the topological nodal-line semimetal SrAs3
Creators: name: Cheng, E. J.
name: Xia, W.
name: Shi, X. B.
name: Yu, Z. H.
name: Wang, L.
name: Yan, L. M.
name: Peets, D. C.
name: Zhu, C. C.
name: Su, H.
name: Zhang, Y.
name: Dai, D. Z.
name: Wang, X.
name: Zou, Z. Q.
name: Yu, N.
name: Kou, X. F.
name: Yang, W. G.
name: Zhao, W. W.
name: Guo, Y. F.
name: Li, S. Y.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Topological nodal-line semimetals (TNLSMs) are materials whose conduction and valence bands cross each other, meeting a topologically-protected closed loop rather than discrete points in the Brillouin zone (BZ). The anticipated properties for TNLSMs include drumhead-like nearly flat surface states, unique Landau energy levels, special collective modes, long-range Coulomb interactions, or the possibility of realizing high-temperature superconductivity. Recently, SrAs3 has been theoretically proposed and then experimentally confirmed to be a TNLSM. Here, we report high-pressure experiments on SrAs3, identifying a Lifshitz transition below 1 GPa and a superconducting transition accompanied by a structural phase transition above 20 GPa. A topological crystalline insulator (TCI) state is revealed by means of density functional theory (DFT) calculations on the emergent high-pressure phase. As the counterpart of topological insulators, TCIs possess metallic boundary states protected by crystal symmetry, rather than time reversal. In consideration of topological surface states (TSSs) and helical spin texture observed in the high-pressure state of SrAs3, the superconducting state may be induced in the surface states, and is most likely topologically nontrivial, making pressurized SrAs3 a strong candidate for topological superconductor.
description: 22 pages, 5 figures
Demenz und Familie
Creators: name: Buchebner-Ferstl, Sabine
name: Geserick, Christine
Year: 2019
Subjects: Demenz
Familie

description: In Österreich lebten 2014 etwa 130.000 Personen, die an einer Form von Demenz erkrankt waren. Nicht nur für die Betroffenen selbst, sondern auch für die Angehörigen ist die Demenz-Diagnose mit einer Palette an emotionalen und organisatorischen Herausforderungen verbunden. In einer qualitativen Studie wurden österreichweit Familienangehörige von Demenzpatient/innen interviewt, die verschiedene Betreuungs-Settings gewählt haben (familiale Pflege, 24h-Betreuung, stationäre Unterbringung). Es wurde untersucht, was die Erkrankung im Familienkontext bedeutet, sei es in einer Eltern-Kind- oder in einer Paarbeziehung: Was ändert sich in diesen Beziehungen und im weiteren Familiengefüge? Wer übernimmt die Sorgearbeit und warum? Wo liegen die Grenzen der empfundenen Verantwortlichkeit? Und welche Tipps würde man anderen Angehörigen mit auf den Weg geben?
title: Weaving through life : an ethnographic study of the significance of pandanus work to the people of Futuna Island, Vanuatu
Creators: name: Hazelgrove Planel, Lucie
Publisher: name: University of St Andrews
Year: 2019

description: This thesis investigates how workers of pandanus on Futuna Island engage with and navigate the world around them through their work. Pandanus work is integral to social life: it nurtures, sustains, creates meaning and relations. Through focusing on the handicraft and considering pandanus work as a process: from the upkeep of the plants and the treatment of the leaf materials, the creation of structured artefacts and decorative plaited patterns, to the exchange and sale of baskets and mats and the final discarding of the artefacts, the research explores the complex set of meanings, sensibilities and challenges inherent in this multi-faceted and productive activity. The ethnographic study fills an important gap in current research by exploring the pandanus baskets and mats used in the everyday rather than the artefacts of ceremonial importance. The quotidian interests and concerns of people in Vanuatu and how these are expressed through activities and material forms creates the very fabric of the thesis and reveals what is important in life on Futuna. The study is set in a context where local knowledge and ways of doing things are actively reflected on and discussed as people navigate conflicting ideologies and ways of being. I argue that pandanus work is fundamentally a process of production where not only artefacts, but knowledge, subjects and relationships are created, nurtured and developed. Fundamental ideas about life are questioned in processes of pandanus work. Thus through considering the social, religious, and environmental aspects of pandanus work, the research furthers anthropological understandings of how ideas, beliefs and challenges are explored and explained in the quotidian production and use of plaited mats and baskets in Vanuatu. This project explores how women on Futuna figuratively weave the story of their lives.
Modification to the Hawking temperature of a dynamical black hole by a flow-induced supertranslation
Creators: name: Chiang, Hsu-Wen
name: Kung, Yu-Hsien
name: Chen, Pisin
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: One interesting proposal to solve the black hole information loss paradox without modifying either general relativity or quantum field theory, is the soft hair, a diffeomorphism charge that records the anisotropic radiation in the asymptotic region. This proposal, however, has been challenged, given that away from the source the soft hair behaves as a coordinate transformation that forms an Abelian group, thus unable to store any information. To maintain the spirit of the soft hair but circumvent these obstacles, we consider Hawking radiation as a probe sensitive to the entire history of the black hole evaporation, where the soft hairs on the horizon are induced by the absorption of a null anisotropic flow, generalizing the shockwave considered by Hawking et al. To do so we introduce two different time-dependent extensions of the diffeomorphism associated with the soft hair, where one is the backreaction of the anisotropic null flow, and the other is a coordinate transformation that produces the Unruh effect and a Doppler shift to the Hawking spectrum. Together, they form an exact BMS charge generator on the entire manifold that allows the nonperturbative analysis of the black hole horizon, whose surface gravity, i.e. the Hawking temperature, is found to be modified. The modification depends on an exponential average of the anisotropy of the null flow with a decay rate of 4M, suggesting the emergence of a new 2-D degree of freedom on the horizon, which could be a way out of the information loss paradox.
Waste Heat Utilization in Agriculture: Economic Feasibility and Institutional Alternatives
Creators: name: Meekhof, Ronald L.
name: Meekhof, Ronald L.
Publisher: name: Unknown
Year: 1977
Subjects: Agricultural and Food Policy

description: The general problem which this study addresses is whether the waste heat from power plants can be treated as a valuable input to be managed in controlled biological systems. More specifically, is an integrated waste heat utilization system comprised of agricultural and aqua cultural uses economically feasible. 21 Systems which utilize low grade energy provide an alternative for using energy resources more efficiently by recycling those resources, and at the sane tine provide multiple uses of limited water resources.
ADJUSTMENTS IN A FARM BUSINESS IN RESPONSE TO AN ENERGY CRISIS
Creators: name: Burton, Robert
name: Kline, R.G.
name: Burton, Robert
name: Kline, R.G.
Publisher: name: Unknown
Year: 1977
Subjects: Resource /Energy Economics and Policy

description: Effects of the 1973 price increases by the Organization of Petroleum Exporting Countries (OPEC) and the boycott placed on the United States by the OPEC's Arab members awakened Americans to the reality that the U.S. depends on imported petroleum to maintain the present level of energy consumption. Awareness of this domestic energy gap has raised serious questions about the possible impacts of energy crisis conditions on U.S. agricultural production. Agricultural production in the U.S. depends on petroleum products not only for the liquid fuels used by farm machinery, but also for the manufacture of pesticides and nitrogen fertilizer.
The Use Of Social Media For Health In Low And Middle-Income Countries : A Scoping Review
Creators: name: Hagg, Emily
Publisher: name: The University of British Columbia
Year: 2016

description: Background: Social media allows for instant access to, and dissemination of, information around the globe. Access to social media in low and middle-income countries has increased exponentially in recent years due to technological advances. In high-income countries such as the United States, social media is used extensively for health-related purposes, and there is a large body of literature on its use. Within low and middle-income countries, however, research has only just begun to emerge on the use of social media for health. Objective: To identify, explore and summarize the current state of the literature on the use of social media for health in low and middle-income countries. Methods: A scoping review was conducted on literature available to the end of January 2016. Five databases were searched, and grey literature was identified through the Google and Google Scholar search engines. Literature was considered for inclusion if it (1) was published in English, (2) was conducted in or in relation to a low or middle-income country, (3) reported on as least one type of social media or social media use generally, and (4) reported on at least one aspect of human health.
The Extreme Space Weather Event in 1903 October/November: An Outburst from the Quiet Sun
Creators: name: Hayakawa, Hisashi
name: Ribeiro, Paulo
name: Vaquero, José M.
name: Gallego, María Cruz
name: Knipp, Delores J.
name: Mekhaldi, Florian
name: Bhaskar, Ankush
name: Oliveira, Denny M.
name: Notsu, Yuta
name: Carrasco, Víctor M. S.
name: Caccavari, Ana
name: Veenadhari, Bhaskara
name: Mukherjee, Shyamoli
name: Ebihara, Yusuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: While the Sun is generally more eruptive during its maximum and declining phases, observational evidence shows certain cases of powerful solar eruptions during the quiet phase of the solar activity. Occurring in the weak Solar Cycle 14 just after its minimum, the extreme space weather event in 1903 October -- November was one of these cases. Here, we reconstruct the time series of geomagnetic activity based on contemporary observational records. With the mid-latitude magnetograms, the 1903 magnetic storm is thought to be caused by a fast coronal mass ejection (~1500 km/s) and is regarded as an intense event with an estimated minimum Dst' of ~-513 nT The reconstructed time series has been compared with the equatorward extension of auroral oval (~44.1° in invariant latitude) and the time series of telegraphic disturbances. This case study shows that potential threats posed by extreme space weather events exist even during weak solar cycles or near their minima.
description: 20 pages, 5 figures, 1 table, and accepted for publication in the ApJL
data and analysis log with Halimeda tuna phylogeography paper
Creators: name: Verbruggen, Heroen
Publisher: name: figshare
Year: 2020
Subjects: subject: 60409 Molecular Evolution
subject: FOS: Biological sciences

description: These data go with the paper "Phylogeography of the Mediterranean green seaweed Halimeda tuna" by Rindi, Pasella, Lee & Verbruggen.
rp.fas: alignment of rpl2-rpl14 region, showing sample numbersrp_loc.fas: alignment of rpl2-rpl14 region, showing regions of origin
rp_loc_recoded.fas: alignment of rpl2-rpl14 region, with SSRs recoded as described in paper
tufA.fas: alignment of tufA gene, showing sample numbers
tufA_loc.fas: alignment of tufA gene, showing regions of origin01_knitr_script.html: log of R analyses used to produce results and figures
Familien in Zahlen 2019. Statistische Informationen zu Familien in Österreich
Creators: name: Kaindl, Markus
name: Schipfer, Rudolf Karl
Year: 2019
Subjects: Familienforschung
Sozialstatistik
Bevölkerungsstatistik

description: Familien in Zahlen (FiZ) ist eine kompakte Zusammenstellung wichtiger familienbezogener Daten und Statistiken. Dieses familienstatistische Nachschlagewerk wurde 2019 vom ÖIF aktualisiert. Das Referenzjahr der Daten ist – da für das laufende Jahr 2019 noch keine Zahlen verfügbar sind – 2018, im Europateil (Kapitel 10) 2017, in wenigen Fällen 2016. FiZ enthält neben einer Übersicht über die Veränderungen wichtiger familienbezogener Kennzahlen von 2008 bis 2018, Zahlen zu den folgenden Themen: Geburten und Fertilität, Eheschließungen/Scheidungen/Eingetragene Partnerschaften, Bevölkerungsentwicklung, Haushaltsformen, Familienformen, Erwerbstätigkeit, Kinderbetreuung, Familien- und Sozialleistungen sowie europäische Vergleichsdaten. Zusätzlich enthält FiZ 2019 ein Glossar mit Erklärungen der verwendeten familienstatistischen Fachausdrücke.
The impact of stress on the electronic structure of phosphorus allotropes stacked on hexagonal boron nitride
Creators: name: Bienvenu, Baptiste
name: Amara, Hakim
name: Ducastelle, François
name: Sponza, Lorenzo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the mechanical and electronic properties of heterobilayers composed of black phosphorus (BP) on hexagonal boron nitride (hBN) and of blue phosphorus (\Pblue) on hBN by means of ab-intio density functional theory. Emphasis is put on how the stress applied on the constituent layers impact their structural and electronic properties. For this purpose, we adopt a specific scheme of structural relaxation which allows us to distinguish between the energy cost of distorting each layer and the gain in stacking them together. In most cases we find that the BP tends to contract along the softer armchair direction, as already reported for similar structures. This contraction can attain up to 5\% of strain, which might deteriorate its very good transport properties along the armchair direction. To prevent this, we propose a twisted-bilayer configuration where the largest part of the stress applies on the zigzag axis, resulting in a lower impact on the transport properties of BP. We also investigated a \Pblue/hBN bilayer. A peculiar hybridization between the valence states of the two layers lets us suggest that electron-hole pairs excited in the bilayer will exhibit a mixed character, with electrons localized solely in the \Pblue{ }layer, and holes spread onto the two layers.
description: 21 pages, 10 figures
The Light Curve of Supernova 1987A: The Structure of the Presupernova and Radioactive Nickel Mixing
Creators: name: Utrobin, V. P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have studied the influence of the presupernova structure and the degree of Ni-56 mixing on the bolometric light curve of SN 1987A in terms of radiation hydrodynamics in the one-group approximation by abandoning LTE and by taking into account nonthermal ionization and the contribution of spectral lines to opacity. Our study shows that moderate Ni-56 mixing at velocities of < 2500 km/s can explain the observed light curve if the density of the outer layers of the presupernova exceeds the value obtained in the evolutionary model of a single nonrotating star severalfold. Abandoning LTE and allowing for nonthermal ionization when solving the equation of state and calculating the mean opacities and the thermal emission coefficient leads to a significant difference between the gas temperature and the radiation temperature in the optically thin layers of the supernova envelope. We demonstrate the fundamental role of the contribution of spectral lines to the opacity in an expanding envelope and of the accurate description of radiative transfer in reproducing the observed shape of the bolometric light curve. We have found that disregarding the contribution of spectral lines to the opacity introduces an error of 20% into the explosion energy, and that a similar error is possible when determining the mass of the ejected matter. The resonant scattering of radiation in numerous lines accelerates the outer layers to velocities of 36 000 km/s; this additional acceleration affects the outer layers with a mass of 10^{-6} Msun. Proper calculations of the supernova luminosity require that not only the delay effects, but also the limb-darkening effects be taken into account.
description: 16 pages, 13 figures, 1 table
ACCOUNTABILITY AND INNOVATION: CHALLENGES FOR AGRICULTURAL ECONOMISTS
Creators: name: Nielson, James
name: Nielson, James
Publisher: name: Unknown
Year: 1974
Subjects: Teaching/Communication/Extension/Profession

description: The discussion will emphasize accountability, because l believe accountability will largely determine how much support agricultural economics or any other discipline will obtain in the years ahead. I will not be concentrating on administrative problems; I am convinced that accountability is a problem for every member of this profession.
High-resolution radio astronomy: an outlook for Africa
Creators: name: Gurvits, Leonid I.
name: Beswick, Robert
name: Hoare, Melvin
name: Njeri, Ann
name: Blanchard, Jay
name: Sharpe, Carla
name: Tiplady, Adrian
name: de Witt, Aletha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Very Long Baseline Interferometry (VLBI) offers unrivalled resolution in studies of celestial radio sources. The subjects of interest of the IAU Symposium No. 356, the Active Galactic Nuclei (AGN) of all types, constitute the major observing sample of modern VLBI networks. At present, the largest in the world in terms of the number of telescopes and geographical coverage is the European VLBI Network (EVN), which operates under the open sky policy via peer-reviewed observing proposals. Recent EVN observations cover a broad range of science themes from high-sensitivity monitoring of structural changes in inner AGN areas to observations of tidal eruptions in AGN cores and investigation of redshift-dependent properties of parsec-scale radio structures of AGN. All the topics above should be considered as potentially rewarding scientific activities of the prospective African VLBI Network (AVN), a natural scientific ally of EVN. This contribution briefly describes the status and near-term strategy for the AVN development as a southern extension of the EVN-AVN alliance and as an eventual bridge to the Square Kilometre Array (SKA) with its mid-frequency core in South Africa.
description: Presentation at the IAU Symposium. No. 356, Addis Ababa, Ethiopia, Oct 2020; 5 pages, 4 figures
Yesavage Systematic Review Protocol
Creators: name: Brañez-Condorena, Ana
name: Soriano-Moreno, David R
name: Diaz-Barrera, Mario E.
name: Diaz-Chimoy, Blanca
name: Taype-Rondan, Alvaro
Publisher: name: figshare
Year: 2020
Subjects: subject: 170102 Developmental Psychology and Ageing
subject: FOS: Psychology

description: Protocol for systematic review and meta-analysis of accuracy of the Geriatric Depression Scale-4 and Geriatric Depression Scale.5 for screening of depression among older adults.
Σχετικογεωμετρικοί χαρακτηρισμοί σφαιρών του Ευκλείδειου n-διάστατου χώρου
Creators: name: Γεωργιάδης, Γεώργιος Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2021
Subjects: Διαφορική Γεωμετρία
σχετική καθετοποίηση
αναλλοίωτος του Pick
Differential Geometry
relative normalization
Pick invariant

description: Σκοπός της διπλωματικής εργασίας αυτής ήταν η παρουσίαση χαρακτηρισμών Ευκλείδειων (υπερ)σφαιρών στο πλαίσιο της Σχετικής Διαφορικής Γεωμετρίας, ως επί το πλείστον με τη βοήθεια ολοκληρωτικών τύπων. Η Σχετική Διαφορική Γεωμετρία παρουσιάζει ιδιαίτερο ενδιαφέρον, αφού γενικεύει τόσο την Ευκλείδεια όσο και την Αφφινική Διαφορική Γεωμετρία. Αρχικά, υπενθυμίσαμε ορισμούς και αποδείξαμε σχέσεις με βάση τους τελεστές του Beltrami και τα σύμβολα του Christoffel. Στη συνέχεια τοποθετήσαμε τα θεμέλια της θεωρίας των σχετικά καθετοποιημένων υπερεπιφανειών στον (n+1)-διάστατο Ευκλείδειο χώρο, αποδεικνύοντας τους σημαντικότερους τύπους. Ακόμη, ορίσαμε τις καθετοποιήσεις Manhart και επικεντρωθήκαμε στο διάνυσμα του Tchebychev. Επιπλέον, παρουσιάσαμε μία πλειάδα αποτελεσμάτων και συμπερασμάτων σε σχετικά καθετοποιημένες (κατά Manhart κυρίως) ωοειδείς (δηλαδή, απλές, κλειστές και κυρτές προσανατολίσιμες (υπερ)επιφάνειες) (υπερ)επιφάνειες οι οποίες πληρούν ορισμένες ιδιότητες ή σχέσεις που μας οδηγούν σε Ευκλείδειες (υπερ)σφαίρες. Tέλος, επικεντρωθήκαμε σε κυρτές υπερεπιφάνειες και σε υπερεπιφάνειες δεύτερης τάξης. Στην παρούσα εργασία χρησιμοποιήσαμε ενδελεχώς το συμβολισμό του Einstein
description: The aim of the present thesis was the presentation of characterizations of Euclidean (hyper)spheres in the framework of Relative Differential Geometry, mostly with the aid of integral formulae. Relative Differential Geometry is of particular interest, as it generalizes both Euclidean and Affine Differential Geometry. We began this thesis by recalling basic definitions and proving some relations based on the Beltrami operators and the Christoffel symbols. After that we laid the foundations of the theory of relatively normalized hypersurfaces in (n+1)-dimensional Euclidean space and we proved the most important formulae. Furthermore, we defined Manhart's normalizations and we focused on Tchebychev's vector. We also presented a constellation of results and conclusions in relative normalized (mainly, Manhart’s normalizations) ovaloids (i.e. simple, closed and convex orientable (hyper)surfaces) which satisfy certain properties or relations that lead to Euclidean (hyper)spheres. Finally, we focused on convex hypersurfaces and hyperquadrics. In this thesis we thoroughly made use of Einstein's summation convention
Fokus Jugend 2020. Ein Überblick in Zahlen
Creators: name: Schipfer, Rudolf Karl
Year: 2020
Subjects: Jugendforschung
Kinderforschung
Familienforschung
Sozialstatistik

description: „Fokus Jugend“ bietet für Personen, die in den Bereichen Jugendpolitik und Jugendarbeit tätig sind, die wesentlichsten Zahlen zur Situation der Jugend in Österreich und macht Trends in den Bereichen Bevölkerungsstatistik, Migration, Bildung und Ausbildung, Internetnutzung, Arbeitswelt sowie Gesundheit und Lebensbedingungen sichtbar.
Dissipative Rabi model in the dispersive regime
Creators: name: Müller, Clemens
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dispersive regime of circuit QED is the main workhorse for todays quantum computing prototypes based on superconducting qubits. Analytic descriptions of this model typically rely on the rotating wave approximation of the interaction between the qubits and resonators, using the Jaynes-Cummings model as starting point for the dispersive transformation. Here we present analytic results on the dispersive regime of the dissipative Rabi model, without taking the rotating wave approximation of the underlying Hamiltonian. Using a recently developed hybrid perturbation theory based on the expansion of the time evolution on the Keldysh contour [Phys. Rev. A 95, 013847 (2017)], we derive simple analytic expressions for all experimentally relevant dynamical parameters like dispersive shift and resonator induced Purcell decay rate, focussing our analysis on a generic multi-level qubit. The analytical equations are easily tractable and reduce to the known Jaynes-Cummings results in the relevant limit. They however show qualitative differences at intermediate and large detuning, allowing for more accurate modelling of the interaction between superconducting qubits and resonators. In the limit of strong resonator driving, our results additionally predict new types of drive induced qubit dissipation and dephasing, not present in previous theories.
description: 10 pages, 6 Figures
Ideal near-Dirac triple-point semimetal in III-V semiconductor alloys
Creators: name: Fang, Zhenyao
name: Gao, Heng
name: Venderbos, Jörn W. F.
name: Rappe, Andrew M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Despite the growing interest in topological materials, the difficulty of experimentally synthesizing and integrating them with other materials has been one of the main barriers restricting access to their unique properties. Recent advances in synthesizing metastable phases of crystalline materials can help to overcome this barrier and offer new platforms to experimentally study and manipulate band topology. Because III-V semiconductors have a wide range of functional material applications (including optoelectronic devices, light-emitting diodes, and highly efficient solar cells), and because Bi-doped III-V materials can be synthesized by ion plantation and ion-cutoff methods, we revisit the effect of bismuth substitution in metastable III-V semiconductors. Through first-principles calculation methods, we show that in wurtzite structure III-V materials, Bi substitution can lead to band inversion phenomena and induce nontrivial topological properties. Specifically, we identify that GaBi and InBi are Dirac-Weyl semimetals, characterized by the coexistence of Dirac points and Weyl points, and $\text{GaAs}_{0.5} \text{Bi}_{0.5}$, $\text{GaSb}_{0.5} \text{Bi}_{0.5}$, $\text{InSb}_{0.5} \text{Bi}_{0.5}$ are triple-point semimetals, characterized by two sets of "near Dirac" triple points on the Fermi level. These experimentally-accessible bismuth-based topological semimetals can be integrated into the large family of functional III-V materials for experimental studies of heterostructures and future optoelectronic applications.
description: 8 pages, 9 figures
Research data supporting the research publication "Beyond healthiness: The impact of traffic light labels on taste expectations and purchase intentions"
Creators: name: Kunz, Sonja
Year: 2020
Subjects: Research data, syntax, analyses

description: This object contains numerous files containing research data (data /syntax of analyses) of one study featured in the research article "Beyond healthiness: The impact of traffic light labels on taste expectations and purchase intentions" by the authors Sonja Kunz, Simona Haasova, Jannik Rieß and Arnd Florack in the journal Foods.
A long-wave action of spin Hamiltonians and the inverse problem of the calculus of variations
Creators: name: Bostrem, I. G.
name: Ovchinnikov, A. S.
name: Egorov, R. F.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We suggest a method of derivation of the long-wave action of the model spin Hamiltonians using the non-linear partial differential equations of motions of the individual spins. According to the Vainberg's theorem the set of these equations are (formal) potential if the symmetry analysis for the Frechet derivatives of the system is true. The case of Heisenberg (anti)ferromagnets is considered. It is shown the functional whose stationary points are described by the equations coincides with the long-wave action and includes the non-trivial topological term (Berry phase).
title: Flex_extract
title: Software and documentation, as submitted for publication in Geoscientific Model Development
titleType: Subtitle
Creators: name: Philipp, Anne
name: Haimberger, Leopold
name: Seibert, Petra
Year: 2020
Subjects: FLEXPART ECMWF

description: Flex_extract is an open-source software to retrieve meteorological fields from the European Centre for Medium-Range Weather Forecasts (ECMWF) Mars archive to serve as input files for the FLEXTRA/FLEXPART Atmospheric Transport Modelling system. See https://www.flexpart.eu/wiki/FpInputMetEcmwf which gives access to an on-line version of the documentation, and any newer versions of the software.
description: The software contains some parts by third-party autors licensed under Apache Licence Version 2.0
A Measurement of the Degree Scale CMB B-mode Angular Power Spectrum with POLARBEAR
Creators: name: Adachi, S.
name: Faúndez, M. A. O. Aguilar
name: Arnold, K.
name: Baccigalupi, C.
name: Barron, D.
name: Beck, D.
name: Beckman, S.
name: Bianchini, F.
name: Boettger, D.
name: Borrill, J.
name: Carron, J.
name: Chapman, S.
name: Cheung, K.
name: Chinone, Y.
name: Crowley, K.
name: Cukierman, A.
name: Dobbs, M.
name: Bouhargani, H. El
name: Elleflot, T.
name: Errard, J.
name: Fabbian, G.
name: Feng, C.
name: Fujino, T.
name: Galitzki, N.
name: Goeckner-Wald, N.
name: Groh, J.
name: Hall, G.
name: Halverson, N.
name: Hamada, T.
name: Hasegawa, M.
name: Hazumi, M.
name: Hill, C. A.
name: Howe, L.
name: Inoue, Y.
name: Jaehnig, G.
name: Jeong, O.
name: Kaneko, D.
name: Katayama, N.
name: Keating, B.
name: Keskitalo, R.
name: Kikuchi, S.
name: Kisner, T.
name: Krachmalnicoff, N.
name: Kusaka, A.
name: Lee, A. T.
name: Leon, D.
name: Linder, E.
name: Lowry, L. N.
name: Mangu, A.
name: Matsuda, F.
name: Minami, Y.
name: Navaroli, M.
name: Nishino, H.
name: Pham, A. T. P.
name: Poletti, D.
name: Puglisi, G.
name: Reichardt, C. L.
name: Segawa, Y.
name: Silva-Feaver, M.
name: Siritanasak, P.
name: Stebor, N.
name: Stompor, R.
name: Suzuki, A.
name: Tajima, O.
name: Takakura, S.
name: Takatori, S.
name: Tanabe, D.
name: Teply, G. P.
name: Tsai, C.
name: Verges, C.
name: Westbrook, B.
name: Zhou, Y.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a measurement of the $B$-mode polarization power spectrum of the cosmic microwave background (CMB) using taken from July 2014 to December 2016 with the POLARBEAR experiment. The CMB power spectra are measured using observations at 150 GHz with an instantaneous array sensitivity of $\mathrm{NET}_\mathrm{array}=23\, μ\mathrm{K} \sqrt{\mathrm{s}}$ on a 670 square degree patch of sky centered at (RA, Dec)=($+0^\mathrm{h}12^\mathrm{m}0^\mathrm{s},-59^\circ18^\prime$). A continuously rotating half-wave plate is used to modulate polarization and to suppress low-frequency noise. We achieve $32\,μ\mathrm{K}$-$\mathrm{arcmin}$ effective polarization map noise with a knee in sensitivity of $\ell = 90$, where the inflationary gravitational wave signal is expected to peak. The measured $B$-mode power spectrum is consistent with a $Λ$CDM lensing and single dust component foreground model over a range of multipoles $50 \leq \ell \leq 600$. The data disfavor zero $C_\ell^{BB}$ at $2.2σ$ using this $\ell$ range of POLARBEAR data alone. We cross-correlate our data with Planck high frequency maps and find the low-$\ell$ $B$-mode power in the combined dataset to be consistent with thermal dust emission. We place an upper limit on the tensor-to-scalar ratio $r < 0.90$ at 95% confidence level after marginalizing over foregrounds.
Have You Ever Seen the Rain? It Looks Like It's Going to Rain!
Creators: name: Becker, Rolf
Publisher: name: Survey Research Methods
Year: 2021

description: This empirical study examines, whether the weather situations during the different seasons in which panel surveys are carried out have an impact on the timing and extent of survey participation. Based on considerations regarding the panellists’ habits and their assessment of a participation's benefits and costs compared to alternative action, it is assumed that ‘pleasant’ weather diverts them from immediately completing the questionnaire while ‘unpleasant’ weather results in a higher degree of participation right after survey launch. The results of event history analysis based on longitudinal data from a multi-wave panel confirm these assumptions. Additionally, there seems to be an interaction between the season and the weather situation: ‘Pleasant’ weather in spring results in a lower participation rate compared to surveys in summer while, given the same weather situation, the participation rate is higher in autumn. Finally, it is evident that regardless of the season, heavy rainfall at the beginning of the field period is most beneficial for conducting an online survey in terms of both rapid response and high participation rates.
description: Survey Research Methods, Vol 15 No 1 (2021)
Water Quality Goals and the Economic of Agricultural Production
Creators: name: Horner, G.L.
name: Hwang, Ralph B.
name: Horner, G.L.
name: Hwang, Ralph B.
Publisher: name: Unknown
Year: 1974
Subjects: Environmental Economics and Policy

description: The expected policies of the Environmental Protection Agency will restrict the pollution that originates from agricultural production to achieve the 1983 water quality goals. An analytical model is presented to show the influence of agriculture on water quality, and to evaluate the economic impacts of alternative policies designed to achieve the standards.
Ideas Matter: Framing Pan-Africanism, its Concept and History
Creators: name: Sonderegger, Arno
Year: 2020

description: This article looks at the rich history of Pan-Africanism considering its many twists and turns and ambiguities in order to provide an original frame for tackling the writing of its unfolding – both in the sense of the Pan-African concept`s development and its realisation in history. Therefore, it contains an extensive treatment and a critical discussion of Pan-Africanism`s historiography from Geiss (1968) to Adi (2018).The article hints at some crucial aspects so far missing or being underrepresented in prevailing accounts, regarding convincing readings of the entanglements between global, colonial and metropolitan levels in the historiography of Pan-Africanism. It is argued, in particular, that more attention should be paid to existing global histories of nationalism and of global racial discourses, and to the interplay between modern (European) political categories and modern (African) Pan-African ways of reasoning. Moreover, the ambiguities and diversity of colonial situations should be taken into account in a more sophisticated manner than is the case. The article sketches how such a slightly different account of Pan-Africanism`s history in the 20th century could look like.
The Megamaser Cosmology Project. XI. A geometric distance to CGCG 074-064
Creators: name: Pesce, D. W.
name: Braatz, J. A.
name: Reid, M. J.
name: Condon, J. J.
name: Gao, F.
name: Henkel, C.
name: Kuo, C. Y.
name: Lo, K. Y.
name: Zhao, W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: As part of the survey component of the Megamaser Cosmology Project, we have discovered a disk megamaser system in the galaxy CGCG 074-064. Using the GBT and the VLA, we have obtained spectral monitoring observations of this maser system at a monthly cadence over the course of two years. We find that the systemic maser features display line-of-sight accelerations of ~4.4 km s$^{-1}$ yr$^{-1}$ that are nearly constant with velocity, while the high-velocity maser features show accelerations that are consistent with zero. We have also used the HSA to make a high-sensitivity VLBI map of the maser system in CGCG 074-064, which reveals that the masers reside in a thin, edge-on disk with a diameter of ~1.5 mas (0.6 pc). Fitting a three-dimensional warped disk model to the data, we measure a black hole mass of $2.42^{+0.22}_{-0.20} \times 10^7$ M$_{\odot}$ and a geometric distance to the system of $87.6^{+7.9}_{-7.2}$ Mpc. Assuming a CMB-frame recession velocity of $7308 \pm 150$ km s$^{-1}$, we constrain the Hubble constant to $H_0 = 81.0^{+7.4}_{-6.9}$ (stat.) $\pm 1.4$ (sys.) km s$^{-1}$ Mpc$^{-1}$.
description: 22 pages, 6 figures, accepted for publication in ApJ
The Area of a Rough Black Hole
Creators: name: Barrow, John D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the consequences for the black hole area of introducing fractal structure for the horizon geometry. We create a three-dimensional spherical analogue of a 'Koch Snowflake' using a infinite diminishing hierarchy of touching spheres around the Schwarzschild event horizon. We can create a fractal structure for the horizon with finite volume and infinite (or finite) area. This is a toy model for the possible effects of quantum gravitational spacetime foam, with significant implications for assessments of the entropy of black holes and the universe, which is generally larger than in standard picture of black hole structure and thermodynamics, potentially by very considerable factors. The entropy of the observable universe today becomes log(S) is approximately 120(1+D/2) with D = 0 for a smooth spacetime structure and D = 1 for the most intricate. The Hawking lifetime of black holes is also reduced.
description: 6 pages, no figures. New section added and refs, typos corrected in eq. 7 and abstract, refs added
title: The interaction with text of failing and normal readers
Creators: name: Mulholland, Helen
Publisher: name: The Open University
Year: 1984

description: The research reported in this thesis was designed to investigate the nature of reading comprehension failure with a view to improving remedial reading programmes for those children who, although resembling normal readers in other respects, enter secondary education with an inadequate level of reading ability. By the use of cloze tests, in which the reader is required to restore words deleted from a text, comparisons were made between failing readers at age twelve, normal readers of age twelve and normal readers of age nine who had reached the same level of reading comprehension as the failing twelve years old. The three groups' responses were classified by a system based on a view of the reading process as an interaction between the reader and the text. The effects of specific aspects of text on the three groups of readers were investigated. It was found that there were significant differences between the responses offered by the failing readers at age twelve and normal readers at age nine. Since the level of reading ability of the two groups was the same, this suggests that reading failure involves qualitative differences from normal reading development. The types of difficulty experienced by failing readers, as reflected in their cloze responses, include difficulties of visual scanning, reconstruction of syntactic structures and vocabulary. These components did not affect all failing readers equally. Failing readers appear to have greater difficulty than normal in relating their responses to the general theme of the text and tend to treat it as a series of isolated fragments. They make less use of the context following a deleted word than normal readers. Failing readers at age twelve appear to have greater difficulty than normal readers at age nine in recognising which segments of a text contain important information. The whole population of a secondary school, 643 subjects, was tested and it was found that failing readers at age fifteen produced the same pattern of responses as those failing at age twelve. The only improvement appearing in their reading was in the processing of complete sentences. There were indications that remedial programmes designed on the diagnostic basis provided by the research results produced an increase in reading age in six months of a similar order to that produced by previous remedial programmes in a year. The increase was approximately twenty-four months on average for a group of failing readers whose mean reading age on entry was eight years six months. The programme caused them to alter their response patterns to resemble those of normal readers at age twelve.
On Metric Ramsey-type Dichotomies
Creators: name: Bartal, Yair
name: Linial, Nathan
name: Mendel, Manor
name: Naor, Assaf
Publisher: name: arXiv
Year: 2004
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C45; 05C55; 54E40; 05C12; 54E40

description: The classical Ramsey theorem, states that every graph contains either a large clique or a large independent set. Here we investigate similar dichotomic phenomena in the context of finite metric spaces. Namely, we prove statements of the form "Every finite metric space contains a large subspace that is nearly quilateral or far from being equilateral". We consider two distinct interpretations for being "far from equilateral". Proximity among metric spaces is quantified through the metric distortion D. We provide tight asymptotic answers for these problems. In particular, we show that a phase transition occurs at D=2.
description: 14 pages, 0 figures
The Relationship Between Response Probabilities and Data Quality in Grid Questions
Creators: name: Gummer, Tobias
name: Bach, Ruben
name: Daikeler, Jessica
name: Eckman, Stephanie
Publisher: name: Survey Research Methods
Year: 2021

description: Response probabilities are used in adaptive and responsive survey designs to guide data collection efforts, often with the goal of diversifying the sample composition. However, if response probabilities are also correlated with measurement error, this approach could introduce bias into survey data. This study analyzes the relationship between response probabilities and data quality in grid questions. Drawing on data from the probability-based GESIS panel, we found low propensity cases to more frequently produce item nonresponse and nondifferentiated answers than high propensity cases. However, this effect was observed only among long-time respondents, not among those who joined more recently. We caution that using adaptive or responsive techniques may increase measurement error while reducing the risk of nonresponse bias.
description: Survey Research Methods, Vol 15 No 1 (2021)