cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evidence for Environmentally Dependent Cluster Disruption in M83
Creators: name: Bastian, N.
name: Adamo, A.
name: Gieles, M.
name: Lamers, H. J. G. L. M.
name: Larsen, S. S.
name: Silva-Villa, E.
name: Smith, L. J.
name: Kotulla, R.
name: Konstantopoulos, I. S.
name: Trancho, G.
name: Zackrisson, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using multi-wavelength imaging from the Wide Field Camera 3 on the Hubble Space Telescope we study the stellar cluster populations of two adjacent fields in the nearby face-on spiral galaxy, M83. The observations cover the galactic centre and reach out to ~6 kpc, thereby spanning a large range of environmental conditions, ideal for testing empirical laws of cluster disruption. The clusters are selected by visual inspection to be centrally concentrated, symmetric, and resolved on the images. We find that a large fraction of objects detected by automated algorithms (e.g. SExtractor or Daofind) are not clusters, but rather are associations. These are likely to disperse into the field on timescales of tens of Myr due to their lower stellar densities and not due to gas expulsion (i.e. they were never gravitationally bound). We split the sample into two discrete fields (inner and outer regions of the galaxy) and search for evidence of environmentally dependent cluster disruption. Colour-colour diagrams of the clusters, when compared to simple stellar population models, already indicate that a much larger fraction of the clusters in the outer field are older by tens of Myr than in the inner field. This impression is quantified by estimating each cluster's properties (age, mass, and extinction) and comparing the age/mass distributions between the two fields. Our results are inconsistent with "universal" age and mass distributions of clusters, and instead show that the ambient environment strongly affects the observed populations.
description: 6 pages, 3 figures, MNRAS in press
title: Our London: grassroots activism in the post-Fordist city
Creators: name: Mukherjee, Jacob
Publisher: name: Goldsmiths, University of London
Year: 2018

description: This thesis, based on a critical “militant ethnography” (Juris 2007) with an auto-ethnographic component, applies the Gramscian concepts of party, leadership and class (Gramsci 1971) to analyse the attempts of the small radical grassroots activist group Our London (OL) to mobilise a collective oppositional politics within a highly unequal city. The group - which was loosely structured, socially and politically heterogeneous and run on very few resources - aimed to mobilise around economic inequality in London through a campaign for the 2016 London elections. I was a founding member of the group and heavily involved in its activities for much of the research period; my account is therefore necessarily a partial one and involves critical reflection on my own practice as well as that of the group
as a whole.

Through analysis of data collected - including through interviews, observation, collation of internal documents, emails and Facebook posts - I outline how the dispositions and orientations of OL’s activists informed their praxis, developing in the process a novel account of activism as a located social practice. I also explore the collective political activities of the group, discussing the need to articulate identities to interests and the central role of what Dean (2016) calls “crowd events” (p8).

I situate my analysis of grassroots organising within the context of what is often termed post-Fordism: a form of contemporary capitalism characterised by flexibility and decentralisation in workplace organisation and the rise of the informational economy (Harvey 1989; Lazzarrato 1996; Hall 1988). I argue that Gramsci’s (1971) emphasis on the “feeling-passion” (p418) that underpins political collectivity and the need for political action to “develop, solidify and universalise” (p227) incipient expression of class sentiment are more pertinent than ever in societies that operate, as Gilbert (2013) argues, upon neoliberal logics hostile to the very notion and practice and collectivity.
Anthropic versus cosmological solutions to the coincidence problem
Creators: name: Barreira, A.
name: Avelino, P. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we investigate possible solutions to the coincidence problem in flat phantom dark energy models with a constant dark energy equation of state and quintessence models with a linear scalar field potential. These models are representative of a broader class of cosmological scenarios in which the universe has a finite lifetime. We show that, in the absence of anthropic constraints, including a prior probability for the models inversely proportional to the total lifetime of the universe excludes models very close to the $Λ{\rm CDM}$ model. This relates a cosmological solution to the coincidence problem with a dynamical dark energy component having an equation of state parameter not too close to -1 at the present time. We further show, that anthropic constraints, if they are sufficiently stringent, may solve the coincidence problem without the need for dynamical dark energy.
description: 7 pages, 7 figures
Photochemical approach to the cyclohepta[b]indole scaffold by annulative two-carbon ring-expansion
Creators: name: Tymann, Dina Christina
name: Benedix, Lars
name: Iovkova, Lyuba
name: Pallach, Roman
name: Henke, Sebastian
name: Tymann, David
name: Hiersemann, Martin
Publisher: name: TU Dortmund
Year: 2020
Subjects: subject: Cascade reactions
subject: Cyclohepta[b]indole
subject: Indole[2,3-d]tropone
subject: Photochemistry
subject: Ring expansion
subject: 540

description: We report on the implementation of the concept of a photochemically elicited two-carbon homologation of a π-donor–π-acceptor substituted chromophore by triple-bond insertion. Implementing a phenyl connector between the slide-in module and the chromophore enabled the synthesis of cylohepta[b]indole-type building blocks by a metal-free annulative one-pot two-carbon ring expansion of the five-membered chromophore. Post-irradiative structural elaboration provided founding members of the indolo[2,3-d]tropone family of compounds. Control experiments in combination with computational chemistry on this multibond reorganization process founded the basis for a mechanistic hypothesis.
description: Chemistry - a european journal;Vol. 26. 2020, Issue 52, pp 11974-11978
Interkulturalität an Musikhochschulen (er)forschend studieren
Creators: name: Buchborn, Thade
name: Tralle, Eva-Maria
name: Völker, Jonas
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: In diesem Beitrag präsentieren und erläutern wir unser Seminarkonzept zum Thema „Interkulturalität und Musikunterricht“ nach dem Prinzip des Forschenden Studierens. Im Sinne einer reflexiven Lehrer*innenbildung ist Forschendes Studieren ein hochschuldidaktisches Prinzip, das auf die Entwicklung von Reflexivität als einem Hauptmerkmal pädagogischer Professionalität zielt. Im Zentrum des Seminars erschließen sich die Studierenden Forschungszugänge zum Themenfeld, indem sie dominierende Topoi, Verständnisse und Alltagstheorien von Interkulturalität sowie implizite Wissensbestände rekonstruieren, die in ihrem eigenen peerkulturellen Umfeld des Hochschullebens in Bezug auf den Umgang mit Interkulturalität handlungsleitend wirksam sind. Dazu werden u.a. Gruppendiskussionen mit Mitstudierenden aus verschiedenen Studienbereichen der Hochschule erhoben und in Anlehnung an die Forschungsschritte der Dokumentarischen Methode interpretiert.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 2 (2022): Materialien zur Musiklehrer*innenbildung
The WASP-South search for transiting exoplanets
Creators: name: Hellier, Coel
name: Anderson, D. R.
name: Cameron, A. Collier
name: Gillon, M.
name: Lendl, M.
name: Lister, T. A.
name: Maxted, P. F. L.
name: Pollacco, D.
name: Queloz, D.
name: Smalley, B.
name: Triaud, A. H. M. J.
name: West, R. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Since 2006 WASP-South has been scanning the Southern sky for transiting exoplanets. Combined with Geneva Observatory radial velocities we have so far found over 30 transiting exoplanets around relatively bright stars of magnitude 9--13. We present a status report for this ongoing survey.
description: To appear in the proceedings of the OHP conference "Detection and dynamics of transiting exoplanets", 23-27th August 2010
title: The Digital Factory
Creators: name: Altenried, Moritz
Publisher: name: Goldsmiths, University of London
Year: 2018

description: This thesis researches the transformation of labour in digital capitalism. Specifically, it is interested in sites where digital technology brings forth labour relations characterised by rationalisation, standardisation, and decomposition, as well as the precise surveillance and measurement of labour. The notion of the digital factory is put forward to conceptualise this tendency of labour and to argue that digital capitalism is not characterised by the end of the factory, but by its explosion, multiplication, and spatial reconfiguration. 

The empirical investigation is based on four case studies on the transformation of labour under digital conditions: labour in logistics, in video games, on digital crowdwork platforms, and in social media. By analysing the changing labour process, the changing forms of social division and cooperation, as well as the infrastructural and spatial reconfiguration induced by the increasing pervasion of digital technology, the thesis strives to analyse and theorise a specific tendency of labour in the contemporary.

By focusing on this tendency of labour, the thesis contributes to the broad field of critical analysis and theorisation of the transformation of labour under digital conditions. While many approaches tend to foreground the creative, communicative, or artistic features of (dig¬ital) labour in the contemporary moment, the notion of the digital factory highlights diver¬gent effects and sectors in order to contribute to a multifaceted empirical and theoretical understanding of labour in digital capitalism.
Mein Konzept von Musikunterricht – eine Standortbestimmung in Bezug zu aktuellen musikdidaktischen Positionen
Creators: name: Hammerich, Helen
name: Krämer, Oliver
name: Piotraschke, Maximilian
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: Das vorzustellende Material ist innerhalb des Musiklehramtsstudiums an der Hochschule für Musik und Theater Rostock ein zentraler Baustein der Vorbereitungs- und Begleitveranstaltungen zum Praxisjahr Schule. Im Zusammenhang mit ersten Erfahrungen als Lehrende im zukünftigen Berufsfeld Schule zielt das Material darauf ab, dass die Studierenden: • sich mit verschiedenen fachdidaktischen Positionen vertraut machen, die den Horizont des aktuellen Diskurses aufspannen, • dadurch ein Verständnis für die Pluralität musikdidaktischer Konzeptionen entwickeln, • innerhalb dieser Pluralität ihre eigene Position finden und ihre musikdidaktischen Überzeugungen im Lichte der Theorien plausibel begründen können, • Unterschiede zu den Positionsbestimmungen der Mitstudierenden innerhalb der Seminargruppe konstruktiv diskutieren und dabei die Wurzeln der eigenen Überzeugungen reflektieren und hinterfragen und dadurch zu einem Denken in didaktisch begründeten Alternativen angeregt werden.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 2 (2022): Materialien zur Musiklehrer*innenbildung
Controlling Microscopic Friction through Mechanical Oscillations
Creators: name: Guerra, Roberto
name: Vanossi, Andrea
name: Urbakh, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study in detail the recent suggestions by Tshiprut et al. [Phys. Rev. Lett. 95, 016101 (2005)] to tune tribological properties at the nanoscale by subjecting a substrate to periodic mechanical oscillations. We show that both in stick-slip and sliding regimes of motion friction can be tuned and reduced by controlling the frequency and amplitude of the imposed substrate lateral excitations. We demonstrate that the mechanisms of oscillation-induced reduction of friction are different for stick-slip and sliding dynamics. In the first regime the effect results from a giant enhancement of surface diffusion, while in the second regime it is due to the interplay between washboard and oscillation frequencies that leads to the occurrence of parametric resonances. Moreover we show that for particular set of parameters it is possible to sustain the motion with the only oscillations.
title: Greco-Turkish War 1919-1922
title: Greco-Turkish War 1919-1922
Creators: name: Macar, Elçin
Publisher: name: BSB - Bavarian State Library
Year: 2020
Subjects: subject: Griechisch-Türkischer Krieg [1919-1922]
subject: Greco-Turkish War, 1897

description: The end of the First World War and the defeat of the Ottoman Army gave a historical chance to the Greek Prime Minister Venizelos, who aspired to realize the ''Megali Idea''. During the campaign to Asia Minor, the Greek army was confronted with Turkish resistance. The Turkish National Movement forced the Greek army to return to Greece, preventing them from creating the Greater Greece of the Megali Idea.
description: 1914-1918-Online International Encyclopedia of the First World War
description: 1914-1918-Online International Encyclopedia of the First World War
title: Champagne Offensives
title: Champagne Offensives
Creators: name: Lukasik, Sebastian
Publisher: name: BSB - Bavarian State Library
Year: 2020
Subjects: subject: Weltkrieg [1914-1918]
subject: Westfront
subject: World War, 1914-1918--Aerial operations, French

description: In 1915, France’s Champagne region was the setting for two large-scale French offensives directed against German positions between Reims and the Argonne Forest. Despite enormous casualties and a massive expenditure of artillery ammunition, neither offensive succeeded in breaking the strategic deadlock of the Western Front. Seen in this light, the Champagne offensives vividly illustrated the difficulties that modern armies needed to overcome in order to master the emerging paradigm of attritional warfare.
description: 1914-1918-Online International Encyclopedia of the First World War
description: 1914-1918-Online International Encyclopedia of the First World War
A large change in the predicted number of small halos due to a small amplitude oscillating inflaton potential
Creators: name: Rodrigues, Luiz Felippe S.
name: Opher, Reuven
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A smooth inflaton potential is generally assumed when calculating the primordial power spectrum, implicitly assuming that a very small oscillation in the inflaton potential creates a negligible change in the predicted halo mass function. We show that this is not true. We find that a small oscillating perturbation in the inflaton potential in the slow-roll regime can alter significantly the predicted number of small halos. A class of models derived from supergravity theories gives rise to inflaton potentials with a large number of steps and many transplanckian effects may generate oscillations in the primordial power spectrum. The potentials we study are the simple quadratic (chaotic inflation) potential with superimposed small oscillations for small field values. Without leaving the slow-roll regime, we find that for a wide choice of parameters, the predicted number of halos change appreciably. For the oscillations beginning in the 10^7-10^8 solar masses range, for example, we find that only a 5% change in the amplitude of the chaotic potential causes a 50% suppression of the number of halos for masses between 10^7-10^8 solar masses and an increase in the number of halos for masses <10^6 solar masses by factors ~15-50. We suggest that this might be a solution to the problem of the lack of observed dwarf galaxies in the range 10^7-10^8 solar masses. This might also be a solution to the reionization problem where a very large number of Population III stars in low mass halos are required.
description: 6 pages, 8 figures, accepted for publication in Phys. Rev. D
Biographon
Creators: name: Immerz, Anna
name: Tralle, Eva-Maria
Publisher: name: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht.
Year: 2022

description: In diesem Beitrag wird das Biographon als Instrument zur künstlerischen Reflexion der musikalischen Biographie vorgestellt, welches theoretisch an Überlegungen zur Biographiearbeit anknüpft und Professionalisierungsprozesse angehender Musiklehrer*innen befördert. Das Biographon wurde im Rahmen eines musikpädagogischen Seminars mit Lehramtsstudierenden an der Hochschule für Musik Freiburg erstmalig angewandt und erprobt. In diesem Artikel werden die Seminarkonzeption und die Aufgabenstellung des Reflexionsinstruments vorgestellt und theoretisch eingebettet sowie Studierendenergebnisse der Biographone und die Erfahrungen der Seminarleiterinnen besprochen.
description: Die Materialwerkstatt. Zeitschrift für Konzepte und Arbeitsmaterialien für Lehrer*innenbildung und Unterricht., Bd. 4 Nr. 2 (2022): Materialien zur Musiklehrer*innenbildung
On the Decay of Infinite Energy Solutions to the Navier-Stokes Equations in the Plane
Creators: name: Bjorland, Clayton
name: Niche, Cesar J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Infinite energy solutions to the Navier-Stokes equations in $\mathbb{R}^2$ may be constructed by decomposing the initial data into a finite energy piece and an infinite energy piece, which are then treated separately. We prove that the finite energy part of such solutions is bounded for all time and decays algebraically in time when the same can be said of heat energy starting from the same data. As a consequence, we describe the asymptotic behavior of the infinite energy solutions. Specifically, we consider the solutions of Gallagher and Planchon [5] as well as solutions constructed from a "radial energy decomposition". Our proof uses the Fourier Splitting technique of M. E. Schonbek.
description: 11 pages, to appear
title: Naval Blockade (of Germany)
title: Naval Blockade (of Germany)
Creators: name: Kramer, Alan
Publisher: name: BSB - Bavarian State Library
Year: 2020
Subjects: subject: Weltkrieg [1914-1918]
subject: Blockade
subject: World War, 1914-1918--Blockades--Germany

description: Blockades, part of economic warfare, had been employed throughout history. The Allied blockade (1914-1919), which aimed to prevent war supplies reaching Germany, ultimately also targeted the civilian population. It had its counterpart in the German attempt to block supplies to the Entente. Despite the blockade, Germany was able to trade overseas via neutral states. The Allies thus put pressure on the neutrals to limit exports to Germany. By 1918 Germany’s imports had fallen to one-fifth of their pre-war volume, but was this due to the blockade? And what was the relationship between civilian mortality and blockade?
description: 1914-1918-Online International Encyclopedia of the First World War
description: 1914-1918-Online International Encyclopedia of the First World War
MOESM3 of Understanding the functions of endogenous DOF transcript factor in Chlamydomonas reinhardtii
Creators: name: Jia, Bin
name: Xie, Xinfeng
name: Wu, Min
name: Lin, Zijie
name: Yin, Jianbo
name: lou, Sulin
name: Huang, Ying
name: Hu, Zhangli
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology
subject: Computational Biology

description: Additional file 3: Figure S3. Growth carves of transgenic algae Tranc-crDOF-12 and Tranc-gDOF-60 and control strain cc849. Transgenic algae presented similar growth whit control strian.
title: Model discrimination for multicomponent distillation
title: a geometrical approach for total reflux
titleType: AlternativeTitle
Creators: name: Waltermann, Thomas
name: Schlueter, Stefan
name: Benfer, Regina
name: Knoesche, Carsten
name: Górak, Andrzej
name: Skiborowski, Mirko
Publisher: name: TU Dortmund
Year: 2020
Subjects: subject: Distillation
subject: Equilibrium stage model
subject: Model discrimination
subject: Rate-based mode
subject: 660
subject: Destillation
subject: Simulation
subject: ChemSep
subject: Modellierung
subject: Bewertung

description: While rate-based models are available in commercial flowsheet simulation tools, packed distillation columns are still mostly designed based on the equilibrium stage model in combination with HETP values. In order to discriminate between both types of models in a simple way, this article proposes an algorithmic test, based on a geometric criterion for total reflux operation. Substantial differences are illustrated especially for wide-boiling mixtures, while component-specific mass transfer rates either increase or reduce the deviation. The derived results are validated by dedicated experiments.
description: Chemie Ingenieur Technik;Vol. 92. 2020, issue 7, pp 890-906
Effects of a weakly interacting light U boson on the nuclear equation of state and properties of neutron stars in relativistic models
Creators: name: Zhang, Dong-Rui
name: Yin, Ping-Liang
name: Wang, Wei
name: Wang, Qi-Chao
name: Jiang, Wei-Zhou
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the effects of the light vector U-boson that couples weakly to nucleons in relativistic mean-field models on the equation of state and subsequently the consequence in neutron stars. It is analyzed that the U-boson can lead to a much clearer rise of the neutron star maximum mass in models with the much softer equation of state. The inclusion of the U-boson may thus allow the existence of the non-nucleonic degrees of freedom in the interior of large mass neutron stars initiated with the favorably soft EOS of normal nuclear matter. In addition, the sensitive role of the U-boson in the neutron star radius and its relation to the test of the non-Newtonian gravity that is herein addressed by the light U-boson are discussed.
description: 8 pages,7 figures
Additional file 1 of FEGS: a novel feature extraction model for protein sequences and its applications
Creators: name: Mu, Zengchao
name: Yu, Ting
name: Liu, Xiaoping
name: Zheng, Hongyu
name: Wei, Leyi
name: Liu, Juntao
Publisher: name: figshare
Year: 2021
Subjects: subject: Statistics
subject: FOS: Mathematics

description: Additional file 1. Supplemental Material.
Coaxial flow contactors as alternative to double T-contactors for triphasic slug flow generation
Creators: name: Hellmann, David
name: Oliveira-Goncalves, Ícaro De
name: Agar, David W.
Publisher: name: TU Dortmund
Year: 2020
Subjects: subject: Capillary microreactor
subject: Flow pattern
subject: Gas-liquid-liquid segmented flow
subject: Multiphase flow
subject: Slug flow
subject: 660
subject: Mikroreaktor
subject: Mehrphasenströmung
subject: Schwallströmung
subject: Gas-Flüssigkeit-Strömung
subject: Profil

description: Triphasic gas-liquid-liquid slug flow systems have great application potential in flow chemistry and are normally generated with a double T-junction where the continuous phase and one disperse phase form a two-phase flow and the second disperse phase is added at the second junction. This design is limited to high disperse phase ratios when a regular and uniform flow is desired. The use of coaxial contactors allows overcoming most of these restrictions. The slug generation, stability, and regularity of the generated triphasic flow were experimentally characterized.
description: Chemie Ingenieur Technik;Vol. 92. 2020, issue 5, pp 532-539
Laser Pulse Heating of Spherical Metal Particles
Creators: name: Tribelsky, Michael I.
name: Miroshnichenko, Andrey E.
name: Kivshar, Yuri S.
name: Luk'yanchuk, Boris S.
name: Khokhlov, Alexei R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider a general problem of laser pulse heating of spherical metal particles with the sizes ranging from nanometers to millimeters. We employ the exact Mie solutions of the diffraction problem and solve heat-transfer equations to determine the maximum temperature at the particle surface as a function of optical and thermometric parameters of the problem. The main attention is paid to the case when the thermometric conductivity of the particle is much larger than that of the environment, as it is in the case of metal particles in fluids. We show that in this case at any given finite duration of the laser pulse the maximum temperature rise as a function of the particle size reaches an absolute maximum at a certain finite size of the particle, and we suggest simple approximate analytical expressions for this dependence which covers the entire range of variations of the problem parameters and agree well with direct numerical simulations.
description: 7 pages, 6 figures
Exact results on the two-particle Green's function of a Bose-Einstein condensate
Creators: name: Kita, Takafumi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Starting from the Dyson-Beliaev and generalized Gross-Pitaevskii equations with an extra nonlocal potential, we derive an exact expression of the two-particle Green's function K for an interacting Bose-Einstein condensate in terms of unambiguously defined self-energies and vertices. The formula can be a convenient basis for approximate calculations of K. It also tells us that poles of K are not shared with (i.e. shifted from) those of the single-particle Green's function, contrary to the conclusion of previous studies.
description: 5 pages, 2 figures, to appear in Phys. Rev. B
Full thermal switching of enzymes by thermoresponsive poly(2-oxazoline)-based enzyme inhibitors
Creators: name: Hijazi, Montasser
name: Türkmen, Esra
name: Tiller, Jörg C.
Publisher: name: TU Dortmund
Year: 2020
Subjects: subject: Enzymeinhibitors
subject: Functional polymer end groups
subject: Lower critical solutiontemperature polymers
subject: Poly(2- oxazoline)
subject: Thermoresponsive
subject: 660

description: Controlling the activity of enzymes is an important feature for many processes in medicine, bioanalytics, and biotechnology. So far, it has not been possible to fully switch biocatalysts on and off by thermoresponsive enzyme inhibitors. Herein, we present poly(2-oxazoline)s with iminodiacetic acid end groups (POx-IDA) that are lower critical solution temperature (LCST) polymers and thus thermosensitive. They are capable of reversibly inhibiting the activity of horse radish peroxidase and laccase by more than 99 %. Increasing the temperature makes the POx-IDA precipitate, which leads to 100 % recovery of the enzyme activity. This switching cycle is fully reversible. The LCST of the POx-IDA can be tuned by varying the polymer composition to generate a wide range of switching windows.
description: Chemistry - a european journal;Vol. 26. 2020, Issue 59, pp 13367-13371
Entwurf und Betrieb eines Rohrreaktors mit enger Verweilzeitverteilung
Creators: name: Kockmann, Norbert
Publisher: name: TU Dortmund
Year: 2020
Subjects: subject: Axiale Dispersion
subject: Chemische Reaktionstechnik
subject: Sekundärströmung
subject: Verweilzeitverteilung
subject: 660
subject: Rückvermischung
subject: Reaktionstechnik
subject: Sekundärströmung
subject: Verweilzeitverteilung

description: In der Verfahrenstechnik ist die Verweilzeit eine wichtige Auslegungsgröße und eine enge Verweilzeitverteilung ist vorteilhaft, um bei komplexen chemischen Reaktionen mögliche Nebenprodukte zu vermeiden Eine gute radiale Vermischung mit geringer axialer Dispersion sorgt für eine enge Verweilzeitverteilung in einem Rohrreaktor. Die axiale Dispersion in laminarer Strömung in einem geraden Rohr ist sehr hoch und erzeugt damit eine breite Verweilzeitverteilung. Jedoch verbessern Sekundärströmungen die radiale Vermischung, die in diesem Beitrag für gekrümmte Rohrreaktoren untersucht werden. Entwurfshinweise zur guten radialen Vermischung und geometrische Ausführungen von Rohreaktoren mit Umlenkungen werden vorgestellt.
description: Chemie Ingenieur Technik;Vol. 92. 2020, issue 6, pp 685-691
Monitoring of power system dynamics using a hybrid state estimator
Creators: name: Ortiz, Gabriel
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: State estimation
subject: Monitoring systems
subject: PMU
subject: Power system dynamics
subject: WLS
subject: EKF
subject: 620
subject: Stromversorgung
subject: Elektrotechnik

description: Modern power systems are undergoing a transformation process where distributed energy re-sources together with complex load technologies are increasingly integrated. This, in addition to a sustained growth in electricity consumption and a lack of significant investment in trans-mission infrastructure, leads power systems to face with new stochastic operating behavior and dynamics and to operate under stressed conditions. Under such operating conditions, the occurrence of a potential disturbance may cause a partial or a total collapse. Therefore, in order to minimize the risk of collapses and their impact, new monitoring tools must be adopted, capable of providing the right conditions for dynamic wide-area monitoring. The thesis presents a hybrid state estimator, that is a monitoring tool that combines fast synchronized phasor measurements with traditional measurements into a single scheme. It has the ability to estimate at high speed power system dynamics associated to slow and fast transient phenomena considering a reduced amount of phasor measurement units (PMUs). The developed scheme consists of two phases depending on the power system operating regime. In phase one the system is in stationary regime and bus voltages (magnitude and angle) together with related variables like power flows, current through lines, etc. are estimated by a static estimator at a low speed, which is determined by the supervisory control and data acquisition (SCADA) system. When a physical disturbance happens and the system is in transient regime phase two comes into operation. This time, two estimators work in sequence at high speed. First, a static state estimator is used to estimate bus voltages as soon as the synchronized phasor measurement set arrives. Then, a dynamic estimator is in charge of estimating dynamic states of all generators and motors in the system, even if the unit is not observed by a PMU. Full observability is re-stored through a novel data-mining based methodology, which defines, first, a PMU topology that allows monitoring the post-contingency bus voltage dynamics of the entire power system and, second, generates a number of bus voltage pseudo-measurements to extend the observability to the whole system.
title: On the Usage and Vulnerabilities of API Systems
Creators: name: Yu, Conner D.
Publisher: name: Old Dominion University Libraries
Year: 2021

description: To some, Application Programming Interface (API) is one of many buzzwords that seem to be blanketed in obscurity because not many people are overly familiar with this term. This obscurity is unfortunate, as APIs play a crucial role in today’s modern infrastructure by serving as one of the most fundamental communication methods for web services. Many businesses use APIs in some capacity, but one often overlooked aspect is cybersecurity. This aspect is most evident in the 2018 misuse case by Facebook, which led to the leakage of 50 million users’ records.1 During the 2018 Facebook data breach incident, threat actors used Facebook developer APIs to obtain the personal information of Facebook users over the span of a year. This incident raised many concerns due to it potentially violating users’ privacy. This entire third-party data harvesting incident might not have occurred if Facebook had a more proactive API security and management system. This example was a very considerable data breach, but a similar attack could happen to any business that does not correctly understand and implement different security requirements based on the paradigm shift that APIs present. This raises the issue of how to properly secure APIs in a world where they can be misused, with Gartner Research stating that APIs will be a major attack vector in the next few years due to their widespread use.2 To tackle this problem, this research paper sets to discuss the nature of APIs and their security vulnerabilities. Then, we will go into possible preventative measures and design decisions to secure APIs depending on the usage context. This paper aims to offer a blueprint on security best practices to secure API systems across various use cases.
Effects of arterial blood gas concentrations on regional cerebral blood flow and metabolism during exercise
Creators: name: Smith, Kurt Jason
Publisher: name: University of British Columbia
Year: 2015

description: The magnitude of the cerebral blood flow (CBF) response to exercise is primarily related to the sensitive balance between arterial blood gases (partial pressure of arterial oxygen [PaO₂] and carbon dioxide [PaCO₂]) and cerebral metabolism. However, it has remained unclear whether experimentally or environmentally manipulating the oxygen tensions alters the regulatory influence of arterial blood gases on the intracranial velocities (CBV) and regional CBF responses to incremental exercise. The goal of the experimental chapters of this thesis (Chapter 4, 5 and 6) was to quantify the independent and combined influence of PaO₂ and PaCO₂ on global and regional CBV and CBF during exercise. Chapter 4 identified a heightened (nearly twice the expected response) posterior CBV response during hyperoxic (PO₂ ∼713 mmHg) compared to normoxic (PO₂ ∼160 mmHg) exercise. In contrast, both the anterior and posterior CBV responses were unaltered during mild hypoxic (PO₂ ∼121 mmHg) exercise compared to normoxic exercise. Chapter 5 demonstrated that during exercise in severe hypoxia (PO₂ ∼413 mmHg), following partial acclimatization to high altitude (5050 m), global CBF was elevated by ∼20% compared to sea-level exercise. The elevated global CBF during exercise at high altitude served to compensate for the hypoxemia, and in turn maintained cerebral oxygen delivery equivalent to sea-level values. Chapter 6 revisited and extended the observations during hyperoxic exercise from Chapter 4, whereby measures of extra-cranial CBF were compared with the intracranial velocities during normoxic and hyperoxic (PO₂ ∼300 mmHg) exercise, and also in a separate condition in which any exercise-induced rise in PaCO₂ was prevented (i.e., isocapnia was maintained). The differences observed between regional CBV and CBF during normoxic and hyperoxic incremental exercise trials were abolished when PaCO₂ was held constant. This final chapter also demonstrated that the increased ventilation, per se, is unlikely to influence the cerebrovascular response to exercise. In conclusion, changes in arterial blood gases (hypoxia and hyperoxia) can exacerbate the cerebrovascular response to exercise; however, during incremental exercise in hyperoxia, the regional differences, as well as the differential intracranial and extra-cranial flow responses, are mediated primarily by PaCO₂.
Impact of tungsten incorporation on the tribomechanical behavior of AlCrWxSiN films at room and elevated temperature
Creators: name: Tillmann, Wolfgang
name: Feher, Alexander
name: Stangier, Dominic
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: Chromium-based nitride
subject: Tungsten nitride
subject: Reactive magnetron sputtering
subject: Hybrid process
subject: High temperature tribology
subject: 620
subject: 670
subject: Nitride
subject: Magnetronsputtern
subject: Tribologie

description: AlCrWxSiN thin films (0 ≤ x ≤ 17.1 at.%) were synthesized by means of a hybrid magnetron sputtering process, merging direct current (DC) as well as tungsten high power impulse magnetron sputtering (HiPIMS) supplies. The influences of increasing the tungsten contents on the structural as well as the friction and wear behavior at room and high temperatures (500 °C) were elaborated. As a reference, a W61.4N38.6 system served to analyze synergetic effects on the oxidation behavior. Increased tungsten contents in AlCrWxSiN resulted in more distinctive (200)-, (202)-, and (311)- crystal orientations. A W/Cr ratio of ~1 could be correlated with a denser film growth, the highest hardness (24.3 ± 0.7 GPa), and a significantly decreased wear coefficient (<0.3 × 10−5 mm3/Nm). Tribological tests performed at room temperature revealed that the coefficient of friction decreased with higher tungsten contents to µ~0.35. In contrast, at elevated temperatures, the coefficient of friction increased with higher W concentrations due to spotty oxidations in the wear track, which resulted in a locally increased surface roughness. Finally, a phase transformation of the WN film to m-WO3 did not contribute to a friction reduction at 500 °C.
description: Coatings;2021, 11(9), 1033
Indigenous Elders’ Role in Fostering Intergenerational Relationships with Youth
Creators: name: Yang, Tommy
name: Warburton, Darren E. R.
Publisher: name: The Health & Fitness Journal of Canada
Year: 2018

description: The purpose of this student driven commentary is to explore the importance of intergenerational relationships between Indigenous Elders and youths. Indigenous Elders play an important role in fostering intergenerational relationships and passing on cultural and traditional teachings. They pass on traditional knowledges and lessons learned from a lifetime of experiences to the next generation through a variety of means (such as sharing circles and storytelling) to help future generations understand and honour the teachings and understandings of the generations before. Elders play a central role in the passing on of traditional beliefs, language, and cultural practices, which empower Indigenous youth to connect with family and community, promoting ties to the land. Elders are role models supporting a positive cultural identity and establishing ties to Indigenous traditions, values, and practices.
description: The Health & Fitness Journal of Canada, Vol 11 No 4 (2018)
Flavor constraints in a Bosonic Technicolor model
Creators: name: Fukano, Hidenori S.
name: Heikinheimo, Matti
name: Tuominen, Kimmo
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Flavor constraints in a bosonic Technicolor model are considered. We illustrate different sources for their origin, and emphasize in particular the role played by the vector states present in the Technicolor model. This feature is the essential difference in comparison to an analogous model with two fundamental Higgs scalar doublets.
description: 16 pages, 13 figures
Multi-Cell MIMO Downlink with Cell Cooperation and Fair Scheduling: a Large-System Limit Analysis
Creators: name: Huh, Hoon
name: Caire, Giuseppe
name: Moon, Sung-Hyun
name: Kim, Young-Tae
name: Lee, Inkyu
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider the downlink of a cellular network with multiple cells and multi-antenna base stations, including a realistic distance-dependent pathloss model, clusters of cooperating cells, and general "fairness" requirements. Beyond Monte Carlo simulation, no efficient computation method to evaluate the ergodic throughput of such systems has been presented so far. We propose an analytic solution based on the combination of large random matrix results and convex optimization. The proposed method is computationally much more efficient than Monte Carlo simulation and provides surprisingly accurate approximations for the actual finite-dimensional systems, even for a small number of users and base station antennas. Numerical examples include 2-cell linear and three-sectored 7-cell planar layouts, with no inter-cell cooperation, sector cooperation, or full inter-cell cooperation.
description: 29 pages, 5 figures, submitted to IEEE Trans. on Inform. Theory
Does it matter if I am overweight?
Creators: name: Shephard, Roy J.
Publisher: name: The Health & Fitness Journal of Canada
Year: 2018

description: Objective. The objective of this narrative review is to consider the impact of various levels of obesity upon the risks of premature mortality, a reduced-quality-adjusted life span, and various clinically important co-morbidities. Methods. Information obtained from Ovid/Medline and Google Scholar through to November 2018 was supplemented by a search of the author's extensive personal files.   Results. Overweight has only a limited adverse effect upon these several risks, but dangers increase steeply with further fat accumulation; thus severe (type III) obesity greatly augments the risk of premature death, shortening a person's average lifespan by several years. In addition, the obese individual faces a substantial loss of quality-adjusted life years due to effects from various co-morbidities, including (in order of importance to health expectancy) problems arising from the heart and circulation, neoplasms, diabetes mellitus, vascular diseases of the brain, pneumonia and influenza, digestive and renal diseases, accidents and homicides. Various potential covariates of obesity have been considered in epidemiological analyses, but if habitual physical activity has been considered at all, it has typically been represented by a weak questionnaire assessment. Nevertheless, evidence is emerging that obesity and an inadequate level of habitual physical activity have at least partially independent adverse effects upon both life expectancy and quality-adjusted life span. Conclusions. Severe obesity has a substantial negative effect upon both life expectancy and quality-adjusted life span, thus providing yet one more good reason for health practitioners to advocate maintenance of an ideal body mass.
description: The Health & Fitness Journal of Canada, Vol 11 No 4 (2018)
Biomechanical Alterations during Aquatic Treadmill Running
Creators: name: Held, Nicholas James
name: MacLean, Christopher L
name: Warburton, Darren ER
Publisher: name: The Health & Fitness Journal of Canada
Year: 2018

description: Background: Water running, and more specifically aquatic treadmill (ATM) running, has become increasingly popular as part of the rehabilitation of injuries and as a means of cross training. Purpose: The primary purpose of this narrative review was to discuss the kinematic, kinetic, spatiotemporal, and muscle activation differences between ATM and land treadmill running. A secondary purpose was to examine the possible benefits and limitations of applying an ATM running intervention as a means for returning to run or sport were discussed. Methods: A critical appraisal of the current literature revealed a series of studies related to ATM training and/or rehabilitation. Findings: Water provides a unique training and rehabilitation environment owing to the fluid forces acting upon the body during immersion. A growing body of evidence supports the safety and efficacy of ATM for both training and rehabilitation purposes. Current evidence indicates that ATM running does not result in differential biomechanical adaptations in comparison to land treadmill running. Conclusion: Considering the potential beneficial characteristics of water immersion and the increasing popularity of ATM running, a clearer understanding of the biomechanical alterations is warranted in order to aid practitioners in enhancing outcomes when prescribing ATM running.


Key Words: Biomechanics; Running; Aquatic Treadmill; Rehabilitation; Water
description: The Health & Fitness Journal of Canada, Vol 11 No 4 (2018)
D7.3.3 NAIADES Front-End and HMI Mechanisms and Integrated Decision Support Engine – User manual for Braila
Creators: name: Sklavidis, Iosif
Publisher: name: Zenodo
Year: 2023

description: This report provides the user manual about HMI, DSS and the other NAIADES components for the NAIADES Use Cases in Braila (Romania), in order to be translated to Romanian for the convenience of the end-uses, as well as the smooth adaptation of HMI.This document will help the end-users to “unlock” the privileges of using the final platform in testing environments, such as the Use Cases.
Feynman perturbation theory for gauge theory on transverse lattice
Creators: name: Karnevskiy, M. S.
name: Paston, S. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Feynman perturbation theory for nonabelian gauge theory in light-like gauge is investigated. A lattice along two space-like directions is used as a gauge invariant ultraviolet regularization. For preservation of the polinomiality of action we use as independent variables arbitrary (non-unitary) matrices related to the link of the lattice. The action of the theory is selected in such a way to preserve as much as possible the rotational invariance, which remains after introduction of the lattice, as well as to make superfluous degrees of freedom vanish in the limit of removing the regularization. Feynman perturbation theory is constructed and diagrams which does not contain ultraviolet divergences are analyzed. The scheme of renormalization of this theory is discussed.
description: LaTeX, 18 pages
Fight! How video games can power up learning now
Creators: name: Gundlach, Hugh
Publisher: name: The University of Melbourne
Year: 2024
Subjects: classificationCode: 390409
subject: Learning sciences
classificationCode: 520102
subject: Educational psychology

description: Video games are a dominant form of entertainment, consistently outselling books, film, and music combined. How can education learn from their addictive design?