cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Two types of series expansions valid at strong coupling
Creators: name: Edery, Ariel
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is known that perturbative expansions in powers of the coupling in quantum mechanics (QM) and quantum field theory (QFT) are asymptotic series. This can be useful at weak coupling but fails at strong coupling. In this work, we present two types of series expansions valid at strong coupling. We apply the series to a basic integral as well as a QM path integral containing a quadratic and quartic term with coupling constant $λ$. The first series is the usual asymptotic one, where the quartic interaction is expanded in powers of $λ$. The second series is an expansion of the quadratic part where the interaction is left alone. This yields an absolutely convergent series in inverse powers of $λ$ valid at strong coupling. For the basic integral, we revisit the first series and identify what makes it diverge even though the original integral is finite. We fix the problem and obtain, remarkably, a series in powers of the coupling which is absolutely convergent and valid at strong coupling. We explain how this series avoids Dyson's argument on convergence. We then consider the QM path integral (discretized with time interval divided into $N$ equal segments). As before, the second series is absolutely convergent and we obtain analytical expressions in inverse powers of $λ$ for the $n$th order terms by taking functional derivatives of generalized hypergeometric functions. The expressions are functions of $N$ and we work them out explicitly up to third order. The general procedure has been implemented in a Mathematica program that generates the expressions at any order $n$. We present numerical results at strong coupling for different values of $N$ starting at $N=2$. The series matches the exact numerical value for a given $N$ (up to a certain accuracy). The continuum is formally reached when $N\to \infty$ but in practice this can be reached at small $N$.
description: 74 pages; 7 figures, 4 tables
Elastin as a kinetic elastomer : an analysis of its conformational, mechanical, and photoelastic properties
Creators: name: Aaron, Ben-Meyer Benson
Publisher: name: University of British Columbia
Year: 2010

description: The elastic tissue composite is made up of a number of materials that are characterized by different chemical and mechanical properties. The protein elastomer elastin makes up almost 80% of bovine ligamentum nuchae with collagen and the matrix substances making up the other 20%. The analysis of the mechanical properties of the unpurified and purified tissue indicates that elastin is the dominant mechanical component at low strains with collagen contributing significantly at the higher extensions. The physical properties of single, 5 to 8um diameter, water-swollen elastin fibres were investigated on a micro-test apparatus attached to a polarizing microscope, and the results were analyzed by using the kinetic theory relationships. The analysis of the mechanical properties at extensions below 100% indicate that elastic modulus, G = 4.1 x 10⁵Nm⁻², the average molecular weight of the chains between cross-links is in the range of 6000 to 7 100g/mol, and the stress-optical coeffecient, C' = 1 x 10⁻⁹m²N⁻¹ at 24°C. Analysis of the temperature dependence of the stress-optical coeffecient indicated that the polarizability of the random link decreases with increasing temperature. The apparent activation energy for this process is in the order of 1.6 kcal/mole. Analysis of the non-Gaussian mechanical and optical properties at extensions above 100% suggest that the chain between cross-links contains approximately 10 'effective' random links, with each link consisting of 7 to 8 amino acid residues. The explicit assumption of a random network that is made by the kinetic theory was tested by a number of techniques. 400 MHz pmr spectra of the soluble alpha-elastin closely resembled the spectra that were predicted for the random-coil conformation, and the spectra obtained for it's amino acid hydrolysate. Polarized microscopy studies showed intact elastin fibres to be devoid of any crystalline structures. Finally, the parameters for the random chains in the elastin network were used to predict the dimensions of other random proteins. The close correlation of these predictions with published values for a series of proteins in solution in 6M GuHCl provided an independent test of the random conformation, validating the use of the kinetic theory relationships to analyze the macroscopic properties of elastin.
title: Trendstudie: Jugend in Deutschland
title: Grosse Herausforderungen nach dem Corona-Schock : Winter 21/22
titleType: Subtitle
Creators: name: Schnetzer, Simon
name: Hurrelmann, Klaus
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2022
Subjects: subject: 300 Social sciences, Anthropology

description: Die Trendstudie "Jugend in Deutschland – Winter 2021/22" bietet Klarheit und Verständnis für die Einstellungen und das Verhalten zu den drei wichtigsten aktuellen Themen: Klima, Corona und Politik.
Die Jugend in Deutschland ist in einer extremen Umbruchsphase. Wer sie verstehen will, muss seit der Corona-Pandemie öfter und genauer hinschauen. Die renommierten Jugendforscher Simon Schnetzer und Klaus Hurrelmann bieten eine gründliche Analyse, präsentieren die Ergebnisse anschaulich, kompakt und greifbar mit Geschichten von Jugendlichen und zeigen Handlungsempfehlungen für Arbeitgeber, Politik und Bildungseinrichtungen auf. Die Studie ist repräsentativ für 14- bis 29-Jährige in Deutschland (überwiegend Generation Z) und wurde im Oktober 2021 erhoben.
description: 1. EINFÜHRUNG ..... 3
2. CORONA ..... 4
2.1. ALLMÄHLICHE ERHOLUNG VOM CORONA-SCHOCK ..... 4
2.2. STARKE BEEINTRÄCHTIGUNGEN BEI EINER MINDERHEIT ..... 5
2.3. VORSICHT UND RÜCKSICHT PRÄGEN DAS LEBENSGEFÜHL. IMMER NOCH ..... 6
2.4. UNSICHERHEIT TROTZ WEIT VERBREITETEM IMPFSCHUTZ ..... 8
2.5. CORONA-GESCHICHTEN ..... 10
2.6. CORONA-FAZIT ..... 11
3. KLIMA ..... 13
3.1. AKTIVER BEITRAG ZUM KLIMASCHUTZ: JA, ABER ..... 13
3.2. SICH EINSCHRÄNKEN FÜR DIE UMWELT: SCHWIERIG ..... 15
3.3. VERKEHR: DIE JUGEND IST VIELFÄLTIG MOBIL ..... 16
3.4. ESSVERHALTEN: VEGETARISCH UND VEGAN SIND IM KOMMEN ..... 17
3.5. HÖCHSTE KLIMAPRIORITÄT: WÄLDER UND MEERE ..... 18
3.6. KLIMA-FAZIT ..... 19
VORTRAG "JUGEND IN DEUTSCHLAND" (Anzeige) ..... 21
4. POLITIK ..... 22
4.1. GRÖSSTE SORGE: KLIMA. HÖCHSTE PRIORITÄT: RENTE. ..... 22
4.2. ENGAGIERTE JUGEND FÜR GESELLSCHAFT UND POLITIK ..... 23
4.3. AMBIVALENTE HALTUNG ZUR SENKUNG DES WAHLALTERS ..... 25
4.4. PARTEIENLANDSCHAFT AUS SICHT DER JUNGEN ..... 26
4.5. DIE PARTEIPROFILE DER JUGEND IM WINTER 2021/22 ..... 27
4.5. 1. ANHÄNGER:INNEN DER GRÜNEN ..... 28
4.5.2. ANHÄNGER:INNEN DER SPD ..... 28
4.5.3. ANHÄNGER:INNEN DER FDP ..... 29
4.5.4. ANHÄNGER:INNEN DER CDU/CSU ..... 30
4.5.5. ANHÄNGER:INNEN DER AfD ..... 30
4.5.6. ANHÄNGER:INNEN DER LINKEN ..... 31
4.5.7. NICHT WÄHLER:INNEN ..... 32
4.6. POLITIK-FAZIT ..... 32
5. ÜBER DIE AUTOREN ..... 34
6. ANLAGE UND METHODIK DER STUDIE ..... 35
7. LITERATURVERZEICHNIS ..... 36
8. QUELLENVERWEIS / COPYRIGHT ..... 36
Revolutionizing Scholarly Publishing: A Comprehensive Workflow for the Submission, Review, and Publication of Computational Notebooks as Primary Elements of the Scientific Record
Creators: name: Sedora, Brian
name: Stall, Shelley
name: Giampoala, Matthew
name: Ricci, Mia
name: Cockett, Rowan
name: Purves, Steve
name: Hanson, Brooks
Publisher: name: Zenodo
Year: 2023
Subjects: computational notebooks

description: Computational notebooks are increasingly being used by researchers to combine interactive elements, data, and software together with text narratives that form the methodology, protocols, and results of a study, using popular tools such as Jupyter and R Markdown, among others, and executable environments, such as Binder, to execute, manage, and share workflows and analyses. In order to submit these notebooks to a journal for peer review and possible publication, authors must extract the elements of the notebook into traditional text-based submission templates, with loss of functionality and context.

 

Under a grant from the Alfred P. Sloan Foundation (Grant Number: G-2022-19361), AGU is leading a community-driven effort to develop an end-to-end scholarly publishing workflow that will allow for the submission, peer review, and publication of computational notebooks, with full integration of downstream publication services, that also treats notebooks as a primary element of the scientific record.

 

We will present an update on our progress to deliver a ‘proof of concept’ that aims to answer several key questions: What formatting, templates, and metadata are needed for notebooks? How does this workflow integrate with existing standards and tools that scientists and publishers are using? What is the user experience for authors, reviewers, and readers?

 

All of the deliverables, documentation, and methods, including the pilot project work, will be provided openly and designed around open standards for broad adoption. For project information, see https://data.agu.org/notebooks-now/.
Rezension: Ameisengesellschaften. Eine Faszinationsgeschichte
Creators: name: Rogy, Raffaela
Publisher: name: Medienimpulse
Year: 2015

description: In der wissenshistorischen Studie „Ameisengesellschaften. Eine Faszinationsgeschichte“ gibt der Professor für Neuere Deutsche Literatur Niels Werber an Hand eines interdisziplinären Medienaustausches zwischen naturwissenschaftlicher Fachliteratur, Belletristik und ausgewählten Filmen, einen lohnenden Einblick auf den kollektiven Verbund von Ameisen, der als Spiegel für menschliche Gesellschaftsformen gesehen werden kann.
description: Medienimpulse, Bd. 53 Nr. 1 (2015): 1/2015 - Medienpädagogik und E-Learning
Future deterministic programmable networks for 6G - Joint workshop: DESIRE6G, DETERMINISTIC6G and PREDICT-6G
Creators: name: DESIRE6G
name: PREDICT-6G
name: DETERMINISTIC6G
Publisher: name: Zenodo
Year: 2023

description: Joint Workshop at the 2023 EuCNC & 6G Summit: "Future deterministic programmable networks for 6G", by three key European projects that are developing new technologies to tackle determinism at a global scale in the yet to be defined 6G architecture.
Estudo de origem e caracterização nanotecnológica de heteroestruturas minerais bidimensionais de talco e grafita
Creators: name: Nobre, A.G.
name: Andrade, F.R.D. de
Publisher: name: Zenodo
Year: 2021
Subjects: Grafeno
Metamorfismo
Nanoplaquetas de grafita
Nanotecnologia mineral
Pistão-cilindro

description: Resumo O isolamento do grafeno foi responsável pelo surgimento da área dos materiais bidimensionais nas Ciências dos Materiais. Os autores responsáveis pela sua caracterização tecnológica foram laureados com o Prêmio Nobel de Física no ano de 2010, dada a relevância da descoberta. Como desdobramento geocientífico houve o surgimento da Geologia do Grafeno, área especializada em discutir dois aspectos: (i) a produção de grafeno e seus derivados a partir de grafita mineral, evitando o uso de materiais sintéticos de alto custo; e (ii) a extração de nanoplaquetas de grafita que potencialmente podem se comportar como grafeno diretamente de depósitos geológicos. Como estão sendo descobertas diversas ocorrências de grafita cisalhadas e estabilizadas com espessura nanométrica, há interesse tecnológico e econômico no diagnóstico das condições metamórficas responsáveis por esse fenômeno. Desta forma, o trabalho teve como objetivo simular laboratorialmente, via experimentos ao pistão-cilindro, as condições de metamorfismo responsáveis por permitir a formação de nanoplaquetas de grafita e grafeno de alta dureza e condutividade elétrica como forma de modelar termodinâmica e tecnologicamente as variáveis geológicas envolvidas no processo. Como os grafenos naturais somente são estabilizados na presença de outro mineral substrato, os experimentos empregaram talco além da grafita, uma vez que a literatura aponta que filossilicatos são a família de minerais que mais adequadamente atuam como agentes estabilizadores de grafeno. Os procedimentos experimentais realizados avaliaram a efetividade da produção de nanoplaquetas de grafita pela variação de três condições: pressão (litostática), temperatura e forma de disponibilização dos minerais precursores no porta amostras. Foram consideradas condições que não permitissem a mudança de fase dos minerais, com exceção da quebra térmica do talco que libera água no sistema, permitindo a avaliação da presença de fluido na lubrificação da interface dos minerais como elemento de favorecimento dos processos de difusão. Paralelamente, também foram consideradas três formas de contato dos minerais no início dos experimentos: (i) grafita e talco em tarugos adjacentes; (ii) grafita e talco em pós compactos adjacentes; e (iii) grafita e talco em mistura homogeneizada de pós. Os resultados apontam que os precursores em mistura de pós homogeneizada foram os mais eficientes na formação de heteroestruturas bidimensionais.
Online-Spiel-Besprechung: Martin Luthers Abenteuer
Creators: name: Holzer, Lisa
Publisher: name: Medienimpulse
Year: 2015

description: Ein Lernspiel für Kinder rund um das Leben von Martin Luther und die Grundidee der Reformation Verlag: Kids interactive, Agentur für junge Medien Herausgeber: Evangelisch-Lutherische Kirche in Bayern, Evangelisch-lutherische Landeskirche Hannovers, Prof. Dr. Roland Rosenstock von der Universität Greifswald Genre: Edu- und Infotainment Altersempfehlung: Kinder im Grundschulalter (ca. 6 – 10 Jahre) Verfügbar unter dem Link: http://www.kirche-entdecken.de/lutherspiel/
description: Medienimpulse, Bd. 53 Nr. 1 (2015): 1/2015 - Medienpädagogik und E-Learning
Theory of neutrino fast flavor evolution. Part I. Linear response theory and stability conditions
Creators: name: Fiorillo, Damiano F. G.
name: Raffelt, Georg G.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Neutrino-neutrino refraction leads to collective flavor evolution that can include fast flavor conversion, an ingredient still missing in numerical simulations of core-collapse supernovae. We provide a theoretical framework for the linear regime of this phenomenon using the language of response theory. In analogy to electromagnetic waves, we introduce a flavor susceptibility as the linear response to an external flavor field. By requiring self-consistency, this approach leads to the usual dispersion relation for growing modes, but differs from the traditional treatment in that it predicts Landau damping of subluminal collective modes. The new dispersion relation has definite analyticity properties and can be expanded for small growth rates. This approach simplifies and intuitively explains Morinaga's proof of sufficiency for the occurrence of growing modes. We show that weakly growing modes arise as soon as an angular crossing is formed, due to their resonant interaction with individual neutrino modes. For longitudinal plasma waves, a similar resonance causes Landau damping or conversely, the two-stream instability.
description: Title matched to published version
Spezialisierung Medienpädagogik - ein neues Angebot für Lehramtsstudierende
Creators: name: Hug, Theo
name: Maurek, Johannes
name: Missomelius, Petra
name: Schroffenegger, Thomas
Publisher: name: Medienimpulse
Year: 2019

description: Rufe nach mehr Medienkompetenz und Medienbildung in schulischen Kontexten werden inzwischen von vielen Seiten zunehmend deutlicher artikuliert. Mehr und mehr ist klar geworden, dass einseitige Perspektiven der technologischen Qualifizierung zu kurz greifen und differenzierende Perspektiven von Bildung und Kultur in medialisierten und digitalisierten Welten erforderlich sind, wenn in sinnvoller Weise von der Zukunft des Lernens die Rede sein soll. Welche konkreten Aufgabenfelder kommen auf Medienpädagog*innen in der Schule zu? Welche Relevanz hat ihre Arbeit für die Unterrichtsgestaltung, die Schulorganisation und die Entwicklung einer Schule? Die Überlegungen im Essay stehen im Zusammenhang mit einem neuen Studienangebot "Spezialisierung Medienpädagogik" für Lehramtsstudierende und verdeutlichen die Expertise der künftigen AbsolventInnen.
description: Medienimpulse, Bd. 55 Nr. 1 (2017): 1/2017 - Tätigkeitsfelder schulischer MedienpädagogInnen
Novel Regime of Operation for Superconducting Quantum Interference Filters
Creators: name: Shadrin, A. V.
name: Constantinian, K. Y.
name: Ovsyannikov, G. A.
name: Shitov, S. V.
name: Soloviev, I. I.
name: Kornev, V. K.
name: Mygind, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A new operating regime of the Superconducting Quantum Interference Filter (SQIF) is investigated. The voltage to magnetic field response function, V(H), is determined by a Fraunhofer dependence of the critical current and magnetic flux focusing effect in Josephson junctions (F-mode). For SQIF-arrays made of high-Tc superconducting bicrystal Josephson junctions the F-mode plays a predominant role in the voltage-field response V(H). The relatively large superconducting loops of the SQIF are used for inductive coupling to the external input circuit. It is shown that the output noise of a SQIF-array measured with a cooled amplifier in the 1-2 GHz range is determined by the slope of the V(H) characteristic. Power gain and saturation power were evaluated using low frequency SQIF parameters. Finally, we consider the influence of the spread in the parameters of Josephson junctions in the SQIF-array on the V(H) characteristic of the whole structure.
description: 7 pages, 4 figures
Virtuose in Zeit und Bild. Zur Neuedition von Guido Crepax' "Valentina"
Creators: name: Schanz, Benjamin
Publisher: name: Medienimpulse
Year: 2017

description: Medienimpulse, Bd. 55 Nr. 1 (2017): 1/2017 - Tätigkeitsfelder schulischer MedienpädagogInnen
Rezension: Die Vergnügungskultur der Großstadt. Orte – Inszenierungen – Netzwerke (1880–1930)
Creators: name: Winkler, Paul
Publisher: name: Medienimpulse
Year: 2017

description: In die Vergnügungskultur der Großstadt zwischen 1880 und 1930 entführt Paul Nolte im gleichnamigen Sammelband und illustriert abseits des aus sozioökonomischer Perspektive zumeist düster gezeichneten Bildes des Großstadtlebens serene Seiten globaler Metropolen. Als konstitutives Element der urbanen Lebensform wird die populäre Unterhaltungskultur auf ihre Örtlichkeiten, ihre Inszenierung metropolitaner Moderne sowie ihre globalen Verflechtungen hin untersucht, wobei Berlin als europäischer Vergleichswert hervortritt.
description: Medienimpulse, Bd. 55 Nr. 1 (2017): 1/2017 - Tätigkeitsfelder schulischer MedienpädagogInnen
Medienkompetenzentwicklung in einem außerschulischen Lernvideoprojekt für Kinder
Creators: name: Geier, Gerald
name: Ebner, Martin
Publisher: name: Medienimpulse
Year: 2013

description: Ich zeig es Dir – HOCH 2 (kurz IZED2) ist ein medienpädagogisches Praxisprojekt des BIMS e.V., bei dem Lernvideos von Kindern für Kinder erstellt wurden. Zentrale Kompetenzen welche die Teilnehmer des Projekts erwerben sollten waren die technische Kompetenz (iPad, Schnitt, Apps), die didaktische Gestaltung von Lernvideos (Präsentation der Lerninhalte, Gestaltung) und rechtliche Komponenten (Relevantes zu Urheberrecht und Persönlichkeitsrecht, z.B. Darstellung von Personen im Bild). In der ersten Projektphase wurden die teilnehmenden Kinder durch ExperteInnen unterwiesen. In der zweiten Phase wurden die TeilnehmerInnen mit einem Peer–to–Peer–Ansatz zu ExpertInnen und zeigen anderen Kindern („Peers“), in unserem Fall auch Erwachsenen, wie man Lernvideos mit iPads erstellt. In der projekteigenen Begleitforschung, die mit Unterstützung der Technischen Universität Graz durchgeführt wurde, wurden dazu unterschiedliche Verfahren eingesetzt um den Fortschritt der Kompetenzentwicklung nachzuzeichnen. Neben Fragebögen, Gruppeninterviews und Beobachtung wurden auch die Lernvideos analysiert und das Projekttagebuch hinzugezogen.
description: Medienimpulse, Bd. 51 Nr. 2 (2013): 2/2013 - Freizeitpädagogik - Freiwillig, Selbstbestimmt, Selbstorganisiert?
Evolution of density perturbations in decaying vacuum cosmology: The case of non-zero perturbations in the cosmological term
Creators: name: Borges, H. A.
name: Carneiro, S.
name: Fabris, J. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the results of a previous paper where a model of interacting dark energy, with a cosmological term decaying linearly with the Hubble parameter, is tested against the observed mass power spectrum. In spite of the agreement with observations of type Ia supernovas, baryonic acoustic oscillations and the cosmic microwave background, we had shown previously that no good concordance is achieved if we include the mass power spectrum. However, our analysis was based on the ad hoc assumption that the interacting cosmological term is strictly homogeneous. Now we perform a more complete analysis, by perturbing such a term. Although our conclusions are still based on a particular, scale invariant choice of the primordial spectrum of dark energy perturbations, we show that a cosmological term decaying linearly with the Hubble parameter is indeed disfavored as compared to the standard model.
description: Version accepted for publication in Physical Review D
Ectoedemia aegilopidella
Creators: name: van Nieukerken, Erik
name: Laštůvka, Aleš
name: Laštůvka, Zdeněk
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Nepticulidae
Ectoedemia
Ectoedemia aegilopidella

description: 44 aegilopidella Leafmines (Fig. 65). Probably indistinguishable from the mine of E. suberis; a narrow, partly contorted gallery in the first half changes suddenly in a large blotch mine with two lateral bands of frass. Larva. Green. Life history. Larvae collected in March, several weeks earlier than in E. suberis, most adults on the wing in May and June; an individual record in October may represent a (partial) second generation or a late emerging specimen. In this case the species flies together with E. suberis. Distribution. Known from a small area in the Provence region in Southern France: the Estérel massif in the Alpes Maritimes and Var. Etymology. Dedicated to the memory of Henning Hendriksen (Copenhagen) who collected this species for the first time; hendrikseni is a noun in the genitive. The ardent collector and specialist of microlepidoptera Hendriksen died in February 2009 at the age of 80.
description: Published as part of van Nieukerken, Erik, Laštůvka, Aleš & Laštůvka, Zdeněk, 2010, Western Palaearctic Ectoedemia (Zimmermannia) Hering and Ectoedemia Busck s. str. (Lepidoptera: Nepticulidae): five new species and new data on distribution, hostplants and recognition, pp. 1-82 in ZooKeys 32 (32) on pages 33-34, DOI: 10.3897/zookeys.32.282, http://zenodo.org/record/576594
High energy single top photoproduction at the LHC
Creators: name: Ovyn, S.
name: de Jeneret, J. de Favereau
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: High-energy photon-proton interactions at the LHC offer interesting possibilities for the study of top properties. Using a fast simulation of a LHC-like detector, first results on the measurement of the |V_{tb}| matrix element using Wt photoproduction are presented. Anomalous photoproduction of single top due to Flavour-Changing Neutral Currents permits to improve the current limits on the coupling parameters, k_{tuγ} and k_{tcγ} after only 1 fb^{-1}.
description: 8 pages, 5 tables, 1 figure. Presented at the International Workshop on Top Quark Physics (TOP2008), La Biodola, Isola d'Elba, Italy, May 2008. To be published in "Il nuovo cimento"
title: Spaces to Breathe
Creators: name: Rinn, Ryan
Publisher: name: Richmond Racial Equity Essays
Year: 2021

description: This is essay number 22 from the book Richmond Racial Equity Essays, edited by Ebony Walden and Meghan Z. Gough. It appears on pages 108-110 of the book in the section "Building a Healthy Environment." The author's vision is of a racially equitable Richmond that looks like every resident having the mental and physical health benefits of green space easily walkable from where they live. He outlines ideas for achieving this vision, with Black and Brown-led onboarding of new parks in neighborhoods and communities where no greenspaces exist within walking distance. Community-led creation of public open space is the inverse of annexation; it is an anti-racist land use strategy that empowers residents to build and enjoy places for the people.
Prospects of inflation with perturbed throat geometry
Creators: name: Ali, Amna
name: Chingangbam, R.
name: Panda, Sudhakar
name: Sami, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study brane inflation in a warped deformed conifold background that includes general possible corrections to the throat geometry sourced by coupling to the bulk of a compact Calabi-Yau space. We focus specifically, on the perturbation by chiral operator of dimension 3/2 in the CFT. We find that the effective potential in this case can give rise to required number of e-foldings and the spectral index $n_S$ consistent with observation. The tensor to scalar ratio of perturbations is generally very low in this scenario. The COBE normalization, however, poses certain difficulties which can be circumvented provided model parameters are properly fine tuned. We find the numerical values of parameters which can give rise to enough inflation, observationally consistent values of density perturbations, scalar to tensor ratio of perturbations and the spectral index $n_S$.
description: 7 pages and nine figures; typos corrected, minor comments and clarifications added, revised version to appear in PLB
Avaliação da mobilidade de nanopartículas de ferro em meio poroso através de microtomografia de raios-x
Creators: name: Pino, Daphne S.
name: Bertolo, Reginaldo A.
name: Pak, Tannaz
name: Archilha, Nataly L.
Publisher: name: Zenodo
Year: 2021
Subjects: ferro zero-valente
nanoremediação
águas subterrâneas
áreas contaminadas
microtomografia de raios-x

description: Resumo A nanorremediação é uma tecnologia emergente no tratamento de aquíferos contaminados, através do uso de nanomateriais reativos. Estudos em escalas de coluna, piloto e campo relataram reduções bem-sucedidas na concentração de contaminantes após a injeção de nanopartículas de ferro zero valente (nZVI) em áreas contaminadas. Entretanto, as lacunas de conhecimento acerca dos processos em escala de poro limitam a otimização de projetos de nanorremediação em escalas maiores. Em resposta a este desafio, investiga-se mobilidade e aprisionamento de nZVI em meios porosos em escala de poro, usando microtomografia computadorizada de raios-X (µCT). A dinâmica do fluxo de fluidos em meios porosos é um processo rápido, e scanners µCT de bancada são incapazes de capturar detalhes, exigindo alta resolução de tempo apenas possibilitada por técnicas de síncrotron. A luz síncrotron é um tipo de radiação eletromagnética que permite o estudo 3D não-destrutivo da estrutura interna dos materiais, bem como seu comportamento em diferentes condições. Ensaios de injeção de nZVI foram realizados em 2 colunas de areia com diferentes granulometrias. As amostras foram fotografadas em 3 segmentos, movendo-as verticalmente, permitindo a avaliação da mobilidade de nZVI ao longo de toda a coluna em cada etapa do experimento, sem comprometer a resolução da imagem. Os dados foram adquiridos através da rotação da amostra na linha de feixe de raios-X, enquanto o detector coletou as projeções (imagens radiográficas) a cada ângulo. Algoritmos de reconstrução de imagem foram usados para gerar imagens 3D da amostra a partir das imagens radiográficas 2D coletadas. Observou-se a existência de grupos de nanopartículas móveis e não-móveis. Na escala de poro, as nanopartículas presas ocuparam principalmente as gargantas de poros (porções mais estreitas do meio poroso). Ademais, a suspensão de nZVI não é miscível com a fase inicial de água, formando uma fina película de água (fase molhante) sobre os grãos. Os resultados destes experimentos lançam luz sobre os mecanismos em escala de poros envolvidos no aprisionamento de nZVI em meios porosos. A comparação dos resultados para amostras de areia grossa e fina ajudará a melhorar a eficiência dos processos de remediação de águas subterrâneas baseados em nanotecnologia.
title: Nachtragsjägerei und Akquisition, eine unmögliche Symbiose?
Creators: name: Köppel, Bernd
Publisher: name: Bauhaus-Universität Weimar
Year: 2006
Subjects: subject: Baubetriebslehre
subject: Nachtragsvereinbarung
subject: Prozessmanagement
subject: 620

description: Tag des Baubetriebs 2006 - Tagungsbeiträge: Nachtragsmanagement in Praxis und Forschung, p. 5
description: Schriften der Professur Baubetrieb und Bauverfahren, vol. 12
From Manifestations to Cognitive Architectures: a Scalable Framework
Creators: name: Ibias, Alfredo
name: Ramirez-Miranda, Guillem
name: Guinovart, Enric
name: Alarcon, Eduard
Publisher: name: arXiv
Year: 2024
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The Artificial Intelligence field is flooded with optimisation methods. In this paper, we change the focus to developing modelling methods with the aim of getting us closer to Artificial General Intelligence. To do so, we propose a novel way to interpret reality as an information source, that is later translated into a computational framework able to capture and represent such information. This framework is able to build elements of classical cognitive architectures, like Long Term Memory and Working Memory, starting from a simple primitive that only processes Spatial Distributed Representations. Moreover, it achieves such level of verticality in a seamless scalable hierarchical way.
title: Transparenz im Änderungsmanagement - ein Vorteil für alle Vertragspartner?
Creators: name: Bauch, Ullrich
Publisher: name: Bauhaus-Universität Weimar
Year: 2006
Subjects: subject: Baubetriebslehre
subject: Nachtragsvereinbarung
subject: Prozessmanagement
subject: 620

description: Tag des Baubetriebs 2006 - Tagungsbeiträge: Nachtragsmanagement in Praxis und Forschung, p. 11
description: Schriften der Professur Baubetrieb und Bauverfahren, vol. 12
Electronic and magnetic properties of graphene-fluorographene nanoribbons: Controllable semiconductor-metal transition
Creators: name: Guzmán-Arellano, R. M.
name: Hernández-Nieves, A. D.
name: Peeters, F. M.
name: Usaj, Gonzalo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the electronic and magnetic properties of graphene channels ($2$--$4$~nm wide) embedded within fluorographene, focusing on two distinct interfaces: the fully fluorinated $α$ interface and the half-fluorinated $β$ interface. Density functional theory (DFT) calculations reveal that $αα$ systems exhibit semiconducting behavior with antiferromagnetic ordering, closely resembling pristine zigzag graphene nanoribbons. In contrast, $αβ$ systems display ferromagnetism and a width-dependent semiconductor-to-metal transition. To enable the study of larger systems, we develop and validate effective Hubbard models for both $αα$ and $αβ$ channels. Building upon DFT results and a Wannier function analysis, these models accurately reproduce the electronic structure and magnetic ordering observed in DFT calculations. Crucially, our $αβ$ model successfully captures the semiconductor-to-metal transition. Application of this model to larger systems reveals the persistence of a ferromagnetic state with spin polarization localized at the $α$ edge. Our results demonstrate the potential of fluorination for targeted property engineering and provide a basis for exploring graphene-fluorographene systems in device applications ranging from microelectronics to spintronics.
description: 15 pages, 24 figures
Crowd Counting via Perspective-Guided Fractional-Dilation Convolution
Creators: name: Yan, Zhaoyi
name: Zhang, Ruimao
name: Zhang, Hongzhi
name: Zhang, Qingfu
name: Zuo, Wangmeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Crowd counting is critical for numerous video surveillance scenarios. One of the main issues in this task is how to handle the dramatic scale variations of pedestrians caused by the perspective effect. To address this issue, this paper proposes a novel convolution neural network-based crowd counting method, termed Perspective-guided Fractional-Dilation Network (PFDNet). By modeling the continuous scale variations, the proposed PFDNet is able to select the proper fractional dilation kernels for adapting to different spatial locations. It significantly improves the flexibility of the state-of-the-arts that only consider the discrete representative scales. In addition, by avoiding the multi-scale or multi-column architecture that used in other methods, it is computationally more efficient. In practice, the proposed PFDNet is constructed by stacking multiple Perspective-guided Fractional-Dilation Convolutions (PFC) on a VGG16-BN backbone. By introducing a novel generalized dilation convolution operation, the PFC can handle fractional dilation ratios in the spatial domain under the guidance of perspective annotations, achieving continuous scales modeling of pedestrians. To deal with the problem of unavailable perspective information in some cases, we further introduce an effective perspective estimation branch to the proposed PFDNet, which can be trained in either supervised or weakly-supervised setting once the branch has been pre-trained. Extensive experiments show that the proposed PFDNet outperforms state-of-the-art methods on ShanghaiTech A, ShanghaiTech B, WorldExpo'10, UCF-QNRF, UCF_CC_50 and TRANCOS dataset, achieving MAE 53.8, 6.5, 6.8, 84.3, 205.8, and 3.06 respectively.
description: Accepted by T-MM 2021
title: Änderungsmanagementsysteme bei komplexen Projekten - Paradigmenwechsel beim Claimmanagement
Creators: name: Eschenbruch, Klaus
Publisher: name: Bauhaus-Universität Weimar
Year: 2006
Subjects: subject: Baubetriebslehre
subject: Nachtragsvereinbarung
subject: Prozessmanagement
subject: 620

description: Tag des Baubetriebs 2006 - Tagungsbeiträge: Nachtragsmanagement in Praxis und Forschung, p. 17
description: Schriften der Professur Baubetrieb und Bauverfahren, vol. 12
Box–Cox power transformation unconditional quantile regressions with an application on wage inequality
Creators: name: Ghosh, Pallab Kumar
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: This study proposes a semi-parametric estimation method, Box–Cox power transformation unconditional quantile regression, to estimate the impact of changes in the distribution of the explanatory variables on the unconditional quantile of the outcome variable. The proposed method consists of running a nonlinear regression of the recentered influence function (RIF) of the outcome variable on the explanatory variables. We also show the asymptotic properties of the proposed estimator and apply the estimation method to address an existing puzzle in labor economics–why the 50th/10th percentile wage gap has been falling in the USA since the late 1980s. Our results show that declining unionization can explain approximately 10% of the decline in the 50/10 wage gap in 1990–2000 and 23% in 2000–2010.
Searching for cosmological stochastic backgrounds by notching out resolvable compact binary foregrounds with next-generation gravitational-wave detectors
Creators: name: Zhong, Haowen
name: Zhou, Bei
name: Reali, Luca
name: Berti, Emanuele
name: Mandic, Vuk
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Stochastic gravitational-wave backgrounds can be of either cosmological or astrophysical origin. The detection of an astrophysical stochastic gravitational-wave background with ground-based interferometers is expected in the near future. Perhaps even more excitingly, the detection of stochastic backgrounds of cosmological origin by future ground-based interferometers could reveal invaluable information about the early Universe. From this perspective, the astrophysical background is a {\it foreground} that can prevent the extraction of this information from the data. In this paper, we revisit a time-frequency domain notching procedure previously proposed to remove the astrophysical foreground in the context of next-generation ground-based detectors, but we consider the more realistic scenario where we remove individually detectable signals by taking into account the uncertainty in the estimation of their parameters. We find that time-frequency domain masks can still efficiently remove the astrophysical foreground and suppress it to about $5\%$ of its original level. Further removal of the foreground formed by unresolvable events (in particular, unresolvable binary neutron stars), which is about $10$ times larger than the residual foreground from realistic notching, would require detector sensitivity improvements. Therefore, the main limitation in the search for a cosmological background is the unresolvable foreground itself, and not the residual of the notching procedure.
description: 13 pages, 6 figures
BYOD, Smartphonefilme und webbasierte Videoschnittprogramme
Creators: name: Hilzensauer, Wolf
Publisher: name: Medienimpulse
Year: 2014

description: "Ihr könnt ein Referat machen oder einen Fernsehbeitrag dazu gestalten! Sucht es Euch aus!" Dieser Satz könnte schon bald als Arbeitsauftrag in Schulen ausgegeben werden. Die Arbeit für die SchülerInnen bleibt gleich: recherchieren, auswählen, Präsentation zusammenstellen, Referatstext überlegen und schließlich vortragen. Warum nicht vor einer Kamera? Medien als Lernform ist kein neues Konzept, durch die heutigen technischen Möglichkeiten ergeben sich aber innovative pädagogische Ansätze.
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
title: Climate Resilience and Justice in Richmond
Creators: name: Hoffman, Jeremy
Publisher: name: Richmond Racial Equity Essays
Year: 2021

description: This is essay number 23 from the book Richmond Racial Equity Essays, edited by Ebony Walden and Meghan Z. Gough. It appears on pages 111-114 of the book in the section "Building a Healthy Environment." The author examines climate change inequity in Richmond and discusses strategies to deal with it in the long and short term in ways that would lead to climate resilience policy decisions that incorporate the values of community members, demonstrably improve community health and wellbeing, and bolster socioeconomic equity across the city.
title: The Bus Should Be Free
Creators: name: Gordon, Wyatt
name: Walker, Faith
Publisher: name: Richmond Racial Equity Essays
Year: 2021

description: This is essay number 24 from the book Richmond Racial Equity Essays, edited by Ebony Walden and Meghan Z. Gough. It appears on pages 115-117 of the book in the section "Building a Healthy Environment." The authors advocate zero-fare transit for the Greater Richmond Transit Company (GRTC) bus system.
On Quotients of Values of Euler's Function on Factorials
Creators: name: Nath, Ayan
name: Jha, Abhishek
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary: 11A25, Secondary: 11B65, 11N37

description: Recently, there has been some interest in values of arithmetical functions on members of special sequences, such as Euler's totient function $ϕ$ on factorials, linear recurrences, etc. In this article, we investigate, for given positive integers $a$ and $b$, the least positive integer $c=c(a,b)$ such that the quotient $ϕ(c!)/ϕ(a!)ϕ(b!)$ is an integer. We derive results on the limit of the ratio $c(a,b)/(a+b)$ as $a$ and $b$ tend to infinity. Furthermore, we show that $c(a,b)>a+b$ for all pairs of positive integers $(a,b)$ with an exception of a set of density zero.
description: 13 pages, 2 figures; to appear in Bulletin of Australian Mathematical Society
Technologykids
Creators: name: Dopplinger, Ursula
Publisher: name: Medienimpulse
Year: 2014

description: Ziel des Projektes Technologykids war es, im Rahmen der Projektaktivitäten herauszufinden, wie weit sich die Interessen von Mädchen im technisch-naturwissenschaftlichem Bereich von jenen der Buben im Alter von 4 bis 12 Jahren tatsächlich unterschieden und welche Kinder von dem durchgeführten Projekt im kognitivem Bereich am meisten profitierten. Sind die Unterschiede im Interesse von technisch-naturwissenschaftlichen Inhalten bei Buben und Mädchen dieser Alterstufe ein Vorurteil oder tatsächlich vorhanden?
description: Medienimpulse, Bd. 52 Nr. 2 (2014): 2/2014 - Potenziale digitaler Medienkunst
On the limitations of H alpha luminosity as a star formation tracer in spatially resolved observations
Creators: name: Hu, Zipeng
name: Wibking, Benjamin D.
name: Krumholz, Mark R.
name: Federrath, Christoph
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This study examines the limitations of H$α$ luminosity as a tracer of star formation rates (SFR) in spatially resolved observations. We carry out high-resolution simulations of a Milky Way-like galaxy including both supernova and photoionization feedback, and from these we generate synthetic H$α$ emission maps that we compare to maps of the true distribution of young stellar objects (YSOs) on scales from whole-galaxy to individual molecular clouds ($\lesssim 100$ pc). Our results reveal significant spatial mismatches between H$α$ and true YSO maps on sub-100 pc scales, primarily due to ionizing photon leakage, with a secondary contribution from young stars drifting away from their parent molecular clouds. On small scales these effect contribute significantly to the observed anti-correlation between gas and star formation, such that there is noticeably less anti-correlation if we replace an H$α$-based star formation map with a YSO-based one; this in turn implies that previous studies have underestimated the time it takes for young stars to disperse their parent molecular clouds. However, these effects are limited in dense regions with hydrogen columns $N_\mathrm{H} > 3 \times 10^{21}$ cm$^{-2}$, where the H$α$- and YSO-based SFR maps show better agreement. Based on this finding we propose a calibration model that can precisely measure the SFR of large molecular clouds (mean radius > 100 pc) with a combination of H$α$ and CO observations, which provides a foundation for future study of star formation processes in extragalactic molecular clouds.
description: 12 Pages, 9 Figures, accepted by MNRAS
Der Prozess der Medienbildung bei Kindern und Jugendlichen und seine Ausrichtung durch Medienerziehung
Creators: name: Spanhel, Dieter
Publisher: name: Medienimpulse
Year: 2015

description: Medienimpulse, Bd. 53 Nr. 2 (2015): 2/2015 - Begründungen und Ziele der Medienbildung
The regulation of phosphate uptake by intact barley plants
Creators: name: Lefebvre, Daniel Denis
Publisher: name: University of British Columbia
Year: 2010

description: The study of phosphate influx in roots of intact barley (Hordeum vulgare L. var. Bonanza) revealed the presence of two distinct regulatory processes for phosphate absorption. One of these processes, which was elicited in response to phosphate deprivation, in the form of enhanced phosphate uptake, became evident between 11 and 13 days after germination. At 16 days the uptake rates of these plants had reached a maximum value at 2.43μmol/g.f.wt./hour which compared to a value of 0.39μmol/g.f.wt./hour for phosphate sufficient plants. Simultaneously, differences between the respective treatments were also noted in growth rates and phosphate pools. A second regulatory process brought about a rapid reduction of phosphate influx upon the provision of orthophosphate to plants previously starved of phosphate during the phase of enhanced uptake. Within hours of supplying inorganic phosphate to these plants influx was reduced by greater than 50% and during this period influx values were linearly correlated with root orthophosphate concentrations. The time scale of this second response is suggestive of an allosteric inhibition of influx by internal orthophosphate levels. Both regulatory systems studied represented physiological adaptations which would better enable plants, under field conditions, to obtain a sufficient phosphate supply. Severe phosphorus deprivation eventually resulted in a morphological response such as the production of longer, narrower roots providing, the plants a greater surface area, presumably for greater phosphate absorption. At a later time, an increased formation of root-hairs resulted in even greater surface area modification.
Statt Zensur und gegen die Möglichkeitsstrukturen sexueller Gewalt
Creators: name: Schaffer, Johanna
Publisher: name: Medienimpulse
Year: 2017

description: (Erstveröffentlichung in: Hoenes, Josch/Paul, Barbara (Hg.) (2014): un/verblümt. Queere Politiken in Ästhetik und Theorie, Berlin: Revolver Publishing. Die Redaktion der MEDIENIMPULSE dankt dem Verlag und den beiden HerausgeberInnen für die Genehmigung zur Wiederveröffentlichung.)
description: Medienimpulse, Bd. 54 Nr. 2 (2016): 2/2016 - Internet und digitale Medien als sexualisierte Räume
Informatische Grundbildung – ein Ländervergleich
Creators: name: Grandl, Maria
name: Ebner, Martin
Publisher: name: Medienimpulse
Year: 2017

description: In dieser Publikation wollen wir, basierend auf einer Literaturrecherche, einen Überblick über die implementierten bzw. in naher Zukunft geplanten Maßnahmen zur informatischen Grundbildung geben, indem ausgewählte europäische und außereuropäische Länder gegenübergestellt werden. Zuerst wird erläutert, dass das "Gebäude der informatischen Bildung" durch die 3 Säulen "Informatik", "Digital Literacy" und "Medienbildung" aufgebaut wird. Danach folgt eine Betrachtung der informatischen Bildung im deutschsprachigen Europa. Ein genauerer Blick wird zudem auf die Slowakei, auf Polen und insbesondere auf England geworfen, das mit der Einführung des Unterrichtsfaches "Computing" im Jahr 2014 mit gutem Beispiel vorangeht. Auch international gibt es sehr viel Bewegung, wenn es um die Integration einer fundierten informatischen Grundbildung im Schulsystem geht. Dazu werden Maßnahmen in den USA und in Australien beleuchtet und weltweite außerschulische Initiativen genannt.
description: Medienimpulse, Bd. 55 Nr. 2 (2017): 2/2017 - Digitale Grundbildung