cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Vortex partition functions, wall crossing and equivariant Gromov-Witten invariants
Creators: name: Bonelli, Giulio
name: Sciarappa, Antonio
name: Tanzini, Alessandro
name: Vasko, Petr
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper we identify the problem of equivariant vortex counting in a $(2,2)$ supersymmetric two dimensional quiver gauged linear sigma model with that of computing the equivariant Gromov-Witten invariants of the GIT quotient target space determined by the quiver. We provide new contour integral formulae for the ${\cal I}$ and ${\cal J}$-functions encoding the equivariant quantum cohomology of the target space. Its chamber structure is shown to be encoded in the analytical properties of the integrand. This is explained both via general arguments and by checking several key cases. We show how several results in equivariant Gromov-Witten theory follow just by deforming the integration contour. In particular we apply our formalism to compute Gromov-Witten invariants of the $\mathbb{C}^3/\mathbb{Z}_n$ orbifold, of the Uhlembeck (partial) compactification of the moduli space of instantons on $\mathbb {C}^2$ and of $A_n$ and $D_n$ singularities both in the orbifold and resolved phases. Moreover, we analyse dualities of quantum cohomology rings of holomorphic vector bundles over Grassmannians, which are relevant to BPS Wilson loop algebrae.
description: 44 pages, no figures: v2 version to appear in Comm. Math. Phys., a new section added
The present-day gas content of simulated field dwarf galaxies
Creators: name: Herzog, Georg
name: Benitez-Llambay, Alejandro
name: Fumagalli, Michele
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We examine the gas content of field dwarf galaxies in a high-resolution cosmological simulation. In agreement with previous work, we find that galaxies inhabiting dark matter haloes with mass below a critical value, $M_{200} \lesssim M_{\rm crit} \approx 5\times 10^{9} \ M_{\odot}$, are quiescent at the present day. The gas content of these galaxies is thus insensitive to feedback from evolving stars. Almost half of these quiescent systems today have gas masses much smaller than that expected for their mass. We find that gas-deficient galaxies originate from 1) past interactions with massive hosts, in which a dwarf loses gas and dark matter via tidal and ram-pressure forces; and 2) from hydrodynamic interactions with the gaseous filaments and sheets of the cosmic web, in which a dwarf loses gas via ram-pressure. We refer to these systems as ``flybys'' and ``COSWEBs''. Flybys locate in high-density regions, tracing the location of the most massive galaxies in the simulation. In contrast, COSWEBs are dispersed throughout the volume and trace the cosmic web. For sub-critical systems, $M_{200} < M_{\rm crit}$, the fraction of COSWEB galaxies can be as high as $35 \%$, and much higher for flybys, which make up 100 per cent of the galaxies with $M_{200}<3\times 10^8 \ \rm M_{\odot}$. The deficit of gas caused by these mechanisms may preclude the detection of a large fraction of field dwarfs in future HI surveys. For galaxies inhabiting halos with mass $M_{200} > M_{\rm crit}$, we find that cosmic web stripping, on average, shuts down star formation in more than $70\%$ of the affected systems.
description: Accepted to MNRAS, 14 pages, 11 figures (10 main text, one appendix)
Inequalities for the Gaussian measure of convex sets
Creators: name: Tehranchi, Michael R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60E15, 28C20

description: This note presents families of inequalities for the Gaussian measure of convex sets which extend the recently proven Gaussian correlation inequality in various directions.
3D System Matrix Calibration by Using Coil Information and Transformer
Creators: name: Shi, Gen
name: Zhang, Liwen
name: Hui, Hui
name: Tian, Jie
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: System Matrix-based image reconstruction approach requires a time-consuming calibration measurement. Existing methods such as compressed sensing and deep learning-based methods treat each row of the system matrix as independent data sample and lack the ability to modelling the relationships between SM rows. We firstly propose to model SM row relationships by the coil position and frequency value, which can be regarded as the additional and multimodal information. we propose a transformer-based neural network for 3D fast SM calibration, which encodes the information of coil position and frequency value into SM with self-attention mechanism in transformer.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Ion core effect on transport characteristics in warm dense matter
Creators: name: Ramazanov, T. S.
name: Issanova, M.
name: Aldakul, Ye. K.
name: Kodanova, S. K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: An effective potential approach in combination with the molecular dynamics (MD) method was used to study the effect of the ionic core on the transport properties of ions in the warm dense matter regime. As an example, we considered shocked silicon. The results of MD simulations within microcanonical ensemble were analyzed by computing the mean squared displacement (MSD) and the velocity autocorrelation function (VAF) of particles. The MSD and VAF are used to compute the diffusion coefficient of ions. The results are compared with the data computed neglecting the ion core effect. It is found that the ion core effect leads to a significant decrease of the diffusion coefficient. Additionally, we computed the viscosity coefficient of ions using the Green-Kubo relation connecting viscosity and the stress autocorrelation function. It is revealed that the ion core effect can cause increase or reduction of the viscosity coefficient depending on the strength of inter-ionic coupling.
Actuation Subspace Prediction with Neural Householder Transforms
Creators: Johnstonbaugh, Kerrick
Publisher: name: University of Alberta Library
Year: 2023

Choosing an appropriate action representation is an integral part of solving robotic manipulation problems. Published approaches include latent action models, which train context-conditioned neural networks to map lowdimensional latent actions to high-dimensional actuation commands. Such models can have a large number of parameters and can be difficult to interpret from a user’s perspective. In this thesis, we propose that similar performance gains in robotics tasks can be achieved by restructuring the neural network to map observations to a basis for a context-dependent linear actuation subspace. This results in an action interface wherein a user’s actions determine a linear combination of state-conditioned actuation basis vectors. We introduce the Neural Householder Transform (NHT) as a method for computing this basis. This thesis describes the development of NHT: from computing an unconstrained basis for a state-conditioned linear map (SCL), to computing an orthonormal basis that changes smoothly with respect to the input context. Two teleoperation user studies indicated that participants preferred using SCL, and tend to achieve higher completion rates with SCL compared to latent action models. In addition, simulation results showed that reinforcement learning agents trained with NHT in kinematic manipulation and locomotion environments tend to be more robust to hyperparameter choice and achieve higher final success rates compared to agents trained with alternative action

representations.
title: Zur Konservierung und Restaurierung des Südportales der ehem. Stiftskirche in Wimpfen im Tal
Creators: name: Fischer, Martina
name: Wölbert, Otto
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 24, Nr. 2 (1995), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Tape #25: Abzug on CNN, Mario Cuomo on the night of the 1982 NY gubernatorial election
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Politics and government
Governors--Election

description: Latin American Friends, Sex Discrimination; Starts with BA CNN commentary, followed by news footage of Mario Cuomo on the night of the 1982 NY gubernatorial election
title: Editorial
Creators: name: Meckes, Franz
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 24, Nr. 3 (1995), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
A Partial Derandomization of PhaseLift using Spherical Designs
Creators: name: Gross, D.
name: Krahmer, F.
name: Kueng, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The problem of retrieving phase information from amplitude measurements alone has appeared in many scientific disciplines over the last century. PhaseLift is a recently introduced algorithm for phase recovery that is computationally efficient, numerically stable, and comes with rigorous performance guarantees. PhaseLift is optimal in the sense that the number of amplitude measurements required for phase reconstruction scales linearly with the dimension of the signal. However, it specifically demands Gaussian random measurement vectors - a limitation that restricts practical utility and obscures the specific properties of measurement ensembles that enable phase retrieval. Here we present a partial derandomization of PhaseLift that only requires sampling from certain polynomial size vector configurations, called t-designs. Such configurations have been studied in algebraic combinatorics, coding theory, and quantum information. We prove reconstruction guarantees for a number of measurements that depends on the degree t of the design. If the degree is allowed to to grow logarithmically with the dimension, the bounds become tight up to polylog-factors. Beyond the specific case of PhaseLift, this work highlights the utility of spherical designs for the derandomization of data recovery schemes.
description: 32 pages, 1 figure. V2: added numerics, improved presentation. To appear in Journal of Fourier Analysis and Applications
The necessity of digital as well as physical automation for sustainable modal shifts
Creators: name: Louzis, Konstantinos
Publisher: name: Zenodo
Year: 2022

description: TRA, the Transport Research Arena, is the largest European research and technology conference on transport and mobility. This year, the conference took place from 14-17 November 2022, at the Lisbon Congress Center (CLL), situated in the historical area of Belém, just by the Tagus River. TRA is the foremost European transport event that covers all transport modes and all aspects of mobility. In 2022, TRA took place in Lisbon, Portugal. Themed “Moving together – reimagining mobility worldwide”, TRA2022 brought together experts from around the world to discuss the newest innovations and future of mobility and transport, building also on the Portuguese historical legacy and links to overseas transport professionals. Through the development of innovative solutions, TRA Lisbon 2022 aimed for a more efficient, safer, carbon-free, inclusive, and sustainable transport in all its modes. TRA offered a great venue for researchers, policy makers and industry representatives to get together and contribute to the discussion on how research and innovation can reshape the transport and mobility system. The conference provided a unique opportunity to hear about mobility trends in different parts of Europe, learn from achievements in industry as well as share best practices of policies and deployments”. On Wednesday 16th of November from 08.30 -10:00, MOSES organized a joint Special Session N51: “Safe and efficient modal shift from roads to waterways: Automated technologies and processes, human-autonomy interactions”, with AEGIS project and Autoship project. Session was moderated by Prof. Nikolaos P. Ventikos from NTUA, and MOSES presentation was delivered by Mr. Konstantinos Louzis from NTUA. The rest speakers of the session were: —Odd Erik Mørkrid, SINTEF Ocean: “Improved waterborne logistics with small uncrewed feeder vessels” —Kristoffer Kloch, DFDS: “Leveraging autonomy to create cost-effective and sustainable businesses for intra-European transport” —Janne Suominen, MacGregor: “Automated cargo handling to reduce transhipment costs”
title: Kloster Seligental - kein Fall für die Denkmalpflege?
Creators: name: Fahrbach, Ute
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 24, Nr. 3 (1995), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Editorial
Creators: name: Biel, Jörg
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 24, Nr. 4 (1995), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Impact Evaluation of Climate Smart Agriculture Program Investments in Food Security Using Machine Learning Estimators
Creators: Lim, Meghan A
Publisher: name: University of Alberta Library
Year: 2023

Smallholder farmers in rural regions of developing countries are often vulnerable to climate events. Climate Smart Agriculture (CSA) seeks to sustain or improve agricultural yields while mitigating climate change. The CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) has made substantial investments in developing and scaling CSA programs in developing countries. Using a multi-country dataset, this paper runs two complementary analyses. The first uses a double/debiased machine learning approach to estimate the impact of participating in a CCAFS CSA program on household food security. I estimate this impact for the entire sample and within three sub-samples, which categorize households according to their CSA adoption strategy (i.e., non-adoption, specialized adoption, or diversified adoption). Results indicate that the probability of a household being food secure is 6.0 percentage points higher (p<0.05) if it participated in a CCAFS program. The food security benefits of CCAFS program participation are most clearly demonstrated among households that adopted a diverse set of CSA practices, where CCAFS training increased the probability of being food secure by 9.7 percentage points (p<0.05). On the other hand, the food security benefits of CCAFS training were negligible among households that did not adopt CSA practices or adopted a specialized set of practices. The second analysis combines traditional machine learning tools with future climate data to predict and compare the future food security of CCAFS program participants and non-participants. Results show that participating households are more likely to be food secure than non-participating households across all periods. Overall, the food security gap between participating and non-participating households is expected to increase over time.
MPI coil temperature stabilization method based on phase change heat storage technology
Creators: name: Chen, Ziwei
name: Yin, Lin
name: Bian, Zhongwei
name: Li, Wei
name: Hui, Hui
name: Tian, Jie
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: In magnetic particle imaging systems, it is necessary to pass a high current through the coil or to run it for a long time to perform a specific function. These generate a large amount of Joule heat in the coil, which introduces additional thermal noise and reduces the signal-to-noise ratio. In this work, we propose a method to control the coil temperature of magnetic particle imaging device based on phase change thermal storage technology by exploiting the latent heat properties of phase change materials. The simulation experiments show that the method makes the coil temperature remain almost constant and suppresses the problem of temperature variation of the energized wire. Compared with active temperature control methods such as liquid helium cooling , oil cooling and water cooling, this method has the advantages of low cost, small size, and good portability.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Tape #24: compilation of Bella Abzug commenting on CNN about various topics
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Politics and government

description: Democrats and Budget, Social Security, French Elections Mormons and the MX, Freedom of Information Act, [undated]; Health care, Elections drink, Hostages, Debate, 10/29/80; Time Magazine in Poll, 6/5/81
Is the mean free path the mean of a distribution?
Creators: name: Paik, Steve T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Physics (physics.class-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We bring attention to the fact that Maxwell's mean free path for a dilute hard-sphere gas in thermal equilibrium, $(\sqrt{2}σn)^{-1}$, which is ordinarily obtained by multiplying the average speed by the average time between collisions, is also the statistical mean of the distribution of free path lengths in such a gas.
description: 19 pages, 5 figures; added discussion of results for hard-sphere gas; improvements to text to increase clarity; published version
Tape #11: compilation of Bella Abzug commenting on CNN about various topics
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Politics and government

description: Health ins, Raises or Roses, Polls apart 1983-4-20; Anti-Nuke info, Freedom of Information, OPEC and Mideast, Women and the '84 Election 1983-4-27; Reagan and Central America 1983-4-28; Cut military funds, Mother's day, Senate budget battle, Postmark and Peace, Women and Children 1983-5-15; Hospice Care 1983-5-13
GRRMHD Simulations of MAD Accretion Disks Declining from Super-Eddington to Sub-Eddington Accretion Rates
Creators: name: Curd, Brandon
name: Narayan, Ramesh
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present two general relativistic radiation magnetohydrodynamics (GRRMHD) simulations of magnetically arrested disks (MADs) around non-spinning ($a_*=0$) and spinning ($a_*=0.9$) supermassive black holes (BHs). In each simulation, the mass accretion rate is decreased with time such that we sample Eddington-scaled rates over the range $3 \gtrsim \dot{M}/\dot{M}_{\rm{Edd}}\gtrsim 0.3$. For the non-spinning BH model, the total and radiative efficiencies increase as the accretion rate decreases, varying over the range $η_{\rm{tot}}\sim9-16\%$ and $η_{\rm{rad}}\sim6-12\%$, respectively. This model shows very little jet activity. In contrast, the spinning BH model has a strong relativistic jet powered by spin energy extracted from the BH. The jet power declines with accretion rate such that $η_{\rm{jet}}\sim 18-39\%$ while the total and radiative efficiencies are $η_{\rm{tot}}\sim 64-100\%$ and $η_{\rm{rad}}\sim 45-79\%$, respectively. We confirm that mildly sub-Eddington disks can extract substantial power from a spinning BH, provided they are in the MAD state. The jet profile out to $100\, GM/c^2$ is roughly parabolic with a power-law index of $k\approx0.43-0.53$ during the sub-Eddington evolution. Both models show significant variability in the outgoing radiation which is likely associated with episodes of magnetic flux eruptions. The $a_*=0.9$ model shows semi-regular variations with a period of $\sim2000\, GM/c^3$ over the final $\sim10,000\, GM/c^3$ of the simulation, which suggests that magnetic flux eruptions may be an important source of quasi-periodic variability. For the simulated accretion rates, the $a_*=0$ model is spinning up while the $a_*=0.9$ model is spinning down. Spinup-spindown equilibrium of the BH will likely be achieved at $0.5 < a_{*,{\rm{eq}}} < 0.6$, assuming continuous accretion in the MAD state.
description: 23 pages, 18 figures
title: Kunst, Partizipation und kulturelle Produktion
Creators: name: Lang, Siglinde
Publisher: name: University Library Heidelberg
Year: 2014

description: Aktuelle Tendenzen hin zu ziviler Mitsprache und aktiver kultureller Mitgestaltung bedeuten, dass vielfältigen, auch widersprüchlichen Perspektiven Raum für Artikulation gegeben wird. Speziell in partizipatorischen Kunstprojekten werden diese Entwicklungen virulent, da sich diese auf konkrete gesellschaftliche Phänomene beziehen: Ein spezifischer kultureller oder sozialer Ist-Stand wird in einem (zumeist) lokalen Kontext aufgegriffen und unter ziviler Beteiligung kollaborativ verhandelt. So verweisen partizipatorische Kunstprojekte auf den Anspruch, gesellschaftliche Fragestellungen unmittelbar in das Blickfeld des künstlerischen Schaffens zu rücken und mit Teilhabe ermöglichenden Strukturen Zugang zu kulturellen Zuschreibungen und Kommunikationsräume für diese zu erschließen – und somit kulturelle Bedeutungsprozesse zu initiieren. Mit Blick auf partizipatorische Kunstprojekte, parallel jedoch über diese hinausweisend, soll im folgenden Beitrag erörtert werden, inwiefern (1) Kunst als intervenierender Motor kultureller Bedeutungsproduktion aufgefasst werden kann. Die (2) Analyse von Herstellungsmechanismen jenes (speziell in partizipatorischen künstlerischen Prozessen entstehenden) Raumes, der sich im Doppelpass mit dem Imaginär-Ästhetischen als Raum zwischen `Fakt´ und `Fiktion´ verorten lässt, bildet dabei die Basis, um (3) Öffentlichkeit und somit Kommunikation über kulturelle Bedeutungszuschreibungen herzustellen.
Dwarf galaxies with central cores in modified Newtonian dynamics (MOND) gravity
Creators: name: Almeida, J. Sanchez
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Some dwarf galaxies are within the Mondian regime at all radii, i.e., the gravitational acceleration provided by the observed baryons is always below the threshold of $g_†\simeq 1.2\times 10^{-10}\,{\rm m\,s^{-2}}$. These dwarf galaxies often show cores, in the sense that assuming Newton's gravity to explain their rotation curves, the total density profile $ρ(r)$ presents a central plateau or {\em core} ($d\log ρ/d\log r\rightarrow 0$ when $r\rightarrow 0$). Here we show that under MOND gravity, the existence of this core implies a baryon content whose density $g_{\rm bar}$ must decrease toward the center of the gravitational potential ($g_{\rm bar}\rightarrow 0$ when $r\rightarrow 0$). Such drop of baryons toward the central region is neither observed nor appears in numerical simulations of galaxy formation following MOND gravity. We analyze the problem posed for MOND as well as possible workarounds.
description: Accepted for publication in ApJ
Recovery of fundamental frequency component in magnetic particle imaging Using an attention-based neural network
Creators: name: Wei, Zechen
name: Liu, Yanjun
name: Zhu, Tao
name: Yang, Xin
name: Hui, Hui
name: Tian, Jie
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: Magnetic particle imaging (MPI) is a rapidly developing medical imaging modality, which uses the nonlinear response of superparamagnetic iron oxide nanoparticles to the applied magnetic field to image their spatial distribution. Due to the direct feedthrough of excitation signals, the existing MPI systems directly filter out the fundamental frequency component of the received signal, resulting in the loss of first harmonic information. In this work, we proposed a deep learning (DL) method adopting self-attention mechanism, which can effectively recover fundamental frequency component of the signals in the presence of background noise. At the same time, our method deals with two-dimensional time-frequency spectrum obtaining by piecewise Fourier transform from the time domain signals. The performance of our method is analyzed via simulation experiments, which show that our method can effectively recover first harmonic information and obtain high quality MPI reconstructed images.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
title: Automatisierte und semiautomatisierte Klassifizierung - eine Analyse aktueller Projekte
Creators: name: Kasprzik, Anna
Publisher: name: University Library Heidelberg
Year: 2014

description: Das sprunghafte Anwachsen der Menge digital verfügbarer Dokumente gepaart mit dem Zeit- und Personalmangel an wissenschaftlichen Bibliotheken legt den Einsatz von halb- oder vollautomatischen Verfahren für die verbale und klassifikatorische Inhaltserschließung nahe. Nach einer kurzen allgemeinen Einführung in die gängige Methodik beleuchtet dieser Artikel eine Reihe von Projekten zur automatisierten Klassifizierung aus dem Zeitraum 2007-2012 und aus dem deutschsprachigen Raum. Ein Großteil der vorgestellten Projekte verwendet Methoden des Maschinellen Lernens aus der Künstlichen Intelligenz, arbeitet meist mit angepassten Versionen einer kommerziellen Software und bezieht sich in der Regel auf die Dewey Decimal Classification (DDC). Als Datengrundlage dienen Metadatensätze, Abstracs, Inhaltsverzeichnisse und Volltexte in diversen Datenformaten. Die abschließende Analyse enthält eine Anordnung der Projekte nach einer Reihe von verschiedenen Kriterien und eine Zusammenfassung der aktuellen Lage und der größten Herausfordungen für automatisierte Klassifizierungsverfahren.
description: Perspektive Bibliothek, Bd. 3, Nr. 1 (2014), Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Bände pro Jahr: 1
title: Die Hofbibliothek Karls des Großen als Kristallisationspunkt der karolingischen Renaissance: Geschichte, Umfeld, Wirkungen
Creators: name: Haberl, Doris
Publisher: name: University Library Heidelberg
Year: 2014

description: Im Aufsatz wird die Rolle der Hofbibliothek Karls des Großen innerhalb der sog. karolingischen Renaissance beleuchtet, einer „correctio“ und „Wiederbelebung der Studien“, die als Verquickung von Bildungs-, Herrschafts- und Verwaltungsreform angesehen werden kann. Die Forschungslage zur Hofbibliothek Karls des Großen ist per se als äußerst problematisch einzustufen. Trotz der Bemühungen von Bernhard Bischoff und Rosamond McKitterick ist es bisher nicht gelungen, größere Teile der Bestände zu lokalisieren. Es bleiben nur kleine, aber zum Teil umso bedeutsamere Splitter wie die „codices authentici“. Im Rahmen des Aufsatzes wird herausgearbeitet, dass die „codices authentici“ und somit auch die Hofbibliothek zu einer Art Transmissionsriemen der „Herrschafts-DNA“ Karls des Großen vor dem Hintergrund der Konzeption eines „imperium christianum“ wurden. Gleichzeitig wird versucht, die Hofbibliothek im Umkreis von Hofschule, Hofakademie und karolingischer Buchproduktion zu verorten, die ein ineinander verwobenes Konglomerat formen und in denen sich die geistig-ideelle Tiefenstruktur von Karls Herrschaft widerspiegelt. Die Hofbibliothek wird als Teil der karolingischen Bildungsreform begriffen und das Buch als solches als Verkünder der göttlichen Heilsbotschaft.
description: Perspektive Bibliothek, Bd. 3, Nr. 1 (2014), Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Bände pro Jahr: 1
Tape #17: Abzug on CNN; NASA footage
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Politics and government

description: Falkland Island, Balance the Budget, 4/12/1982; Nuclear First Strike, Tax time, Argentina, Civil Defense, Naval Maneuvers, Ground Hogs, 4/13/1982; Starts with BA CNN commentary, then switches to NASA footage of a control room and then a plane taking off and landing on a desert airstrip
title: Editorial: Open Access funktioniert tatsächlich!
Creators: name: Apel, Jochen
name: Hermann, Martin
Publisher: name: University Library Heidelberg
Year: 2014

description: Perspektive Bibliothek, Bd. 3, Nr. 2 (2014), Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Bände pro Jahr: 1
Learning Effectiveness of Semester and Year-Long Study Abroad Programmes: Perspectives of International Students in a UK and China Context
Creators: name: O'Dea, Xianghan (Christine)
name: Chen, Wang
name: O'Dea, Mike
Publisher: name: figshare
Year: 2023
Subjects: Higher education
Comparative and cross-cultural education
Inclusive education
Multicultural education (excl. Aboriginal and Torres Strait Islander, Māori and Pacific Peoples)

description: Research on international students’ learning experiences pays much less attention to those studying semester and/or year-long programmes in a country that differs significantly from their home country with respect to culture and the education system. Adopting transformative learning theory as the theoretical framework, this paper explores the learning effectiveness of students on such programme in a Chinese and in a UK university. It analyses the narratives of 27 students in relation to their cognitive and behavioural activities and also their self-reflective and collaborative reflective activities. The findings indicate that these students only partially achieved transformative learning. The main reasons are: (1) the duration of this type of programme was not long enough to achieve a full transformation and (2) both host universities did not include reflection in the learning process properly. This paper makes a contribution to cross-border learning literature in the Chinese and the UK contexts.
Field-swept magnetic particle spectroscopy using a transverse DC field
Creators: name: Liu, Yanjun
name: Feng, Xin
name: Zhang, Haoran
name: Liu, Sijia
name: Li, Guanghui
name: An, Yu
name: Hui, Hui
name: Tian, Jie
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: The transverse magnetization of magnetic nanoparticles (MNPs) induced by a DC field perpendicular to the AC field is of increasing interest in magnetic particle imaging (MPI) and magnetic particle spectroscopy (MPS). It can be used to improve the image quality in MPI and to enhance the sensitivity of MPS without direct feedthrough interference. In this work, we developed a field-swept MPS to observe the response curve of the transverse magnetization by varying the transverse DC field amplitude, and reported a new metric to characterize the nonlinear properties of MNPs, called DCM (the DC field amplitude at the maximum harmonic amplitude). Two commercial MNPs (synomag®-70 and synomag®-50) were investigated. The experimental results show that the DCM is different for the two MNPs and independent of the concentration of MNPs. In addition, the DCM was positively correlated with the viscosity of the sample solvent, which further indicates a correlation with Brownian relaxation.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Multiplicative Arithmetic Functions of Several Variables: A Survey
Creators: name: Tóth, László
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 11A05, 11A25, 11N37

description: We survey general properties of multiplicative arithmetic functions of several variables and related convolutions, including the Dirichlet convolution and the unitary convolution. We introduce and investigate a new convolution, called gcd convolution. We define and study the convolutes of arithmetic functions of several variables, according to the different types of convolutions. We discuss the multiple Dirichlet series and Bell series and present certain arithmetic and asymptotic results of some special multiplicative functions arising from problems in number theory, group theory and combinatorics. We give a new proof to obtain the asymptotic density of the set of ordered $r$-tuples of positive integers with pairwise relatively prime components and consider a similar question related to unitary divisors.
description: 27 pages, revised
Opening Political Bodies: Gender Performativity as Resistance Under Pharmacopornographic Capitalism
Creators: Halpern, Daniel
Publisher: name: University of Alberta Library
Year: 2023

This thesis is an investigation of the performative reconstitution of a queer body and subjectivity in art, and how this allows for not only a reclamation of identity, but also complicates and begins dismantling the present pharmacopornographic model of capitalism. I accomplish this through a close reading of Paul Preciado’s Testo Junkie, and other texts such as Jean-Luc Nancy’s writings on community and José Esteban Muñoz’s Disidentifications. Through the lenses provided by this theorists, I examine the radical implications contained in the work of Ron Athey, Emma Frankland, and Claude Cahun, who each place their queer bodies at the core of their artistic practices. Finally, I explore queer grief as a disidentifactory practice, and locate the importance of mourning in each of these artists’ work. Ultimately, this thesis is a testament to the importance of queer art as a means to destabilize the seemingly all-encompassing pharmacopornographic system which seeks to reduce and demarcate subjects along legible binaries. By showcasing the ways in which liberatory and performative artistic practices allow for the reappropriation of a queer subjectivity, I demonstrate that the harmful narratives around gender, which have been normalized by the pharmaceutical and pornography industries, are dangerous fictions. And thus, this thesis is a small step in the formation of a queer world.
title: Open Access, Freie Software und Co.: Eine Analyse der Gemengelage
Creators: name: Schnalke, Markus
Publisher: name: University Library Heidelberg
Year: 2014

description: Der Open Access ist eine recht junge Erscheinung verglichen mit der Freien Software, welche bereits in den 80er Jahren aufkam. Manche Entwicklungen beim Open Access scheinen sich in ähnlicher Weise bereits Jahre früher bei der Freien Software vollzogen zu haben. Für zukünftige Entwicklungen beim Open Access kann man somit eventuell auf die Erfahrungen bei der Freien Software und ähnlichen Bewegungen zurückgreifen, um Problemfelder und Umwege frühzeitig erkennen und darauf reagieren zu können. Neben der Freien Software gibt es weitere Strömungen. Darunter der Open Source, der zwar häufig synonym verwendet wird und auch große Überschneidungen hat, aber von anderen Beweggründen getrieben wird. Mit den Free Cultural Works wird eine vierte Strömung innerhalb der Welt des Free Content vorgestellt. Diese Strömungen werden einander gegenübergestellt. Ihre Hintergründe sind unterschiedlicher Art, somit auch die jeweilige Motivation. Dies hat wiederum Auswirkungen auf die Definitionen und Lizenzen der verschiedenen Bewegungen, welche der Beitrag zunächst analysiert. In der folgenden Diskussion wird der Open Access im Bezug zu den anderen Strömungen eingeordnet, deren Erfahrungen abschliessend auf den Open Access projiziert werden.
description: Perspektive Bibliothek, Bd. 3, Nr. 2 (2014), Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Bände pro Jahr: 1
On the characterization of GJ 504: a magnetically active planet-host star observed by the Transiting Exoplanet Survey Satellite (TESS)
Creators: name: Di Mauro, Maria Pia
name: Reda, Raffaele
name: Mathur, Savita
name: García, Rafael A.
name: Buzasi, Derek L.
name: Corsaro, Enrico
name: Benomar, Othman
name: Cuesta, Lucía González
name: Stassun, Keivan G.
name: Benatti, Serena
name: Giovannelli, Luca
name: Mesa, Dino
name: Nardetto, Nicolas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the results of the analysis of the photometric data collected in long and short-cadence mode by the Transiting Exoplanet Survey Satellite (TESS) for GJ 504, a well studied planet-hosting solar-like star, whose fundamental parameters have been largely debated during the last decade. Several attempts have been made by the present authors to isolate the oscillatory properties expected on this main-sequence star, but we did not find any presence of solar-like pulsations. The suppression of the amplitude of the acoustic modes can be explained by the high level of magnetic activity revealed for this target, not only by the study of the photometric light-curve, but also by the analysis of three decades available of Mount Wilson spectroscopic data. In particular, our measurements of the stellar rotational period Prot=3.4 d and of the main principal magnetic cycle of 12 a confirm previous findings and allow us to locate this star in the early main sequence phase of its evolution during which the chromospheric activity is dominated by the superposition of several cycles before the transition to the phase of the magnetic-braking shutdown with the subsequent decrease of the magnetic activity.
HELICAL Open Research Guidelines
Creators: name: Christofidou, Maria
name: Navarro-Gallinad, Albert
Publisher: name: Zenodo
Year: 2022
Subjects: Open data
Data sharing
Open Science

description: The aim of the HElical data Linkage for ClinicAL benefit (HELICAL) Open Research Guidelines document is to present a set of recommendations and step-by-step instructions to help Early Stage Researchers and experts share their findings (whether aggregated data, software or algorithms) as open as possible in accordance with the relevant data protection rules and legislation. More specifically, the Guidelines aim to provide an understanding and exemplification as to how research findings (data and analysis) can be published securely in an open-access manner.
Structure controllability of complex network based on preferential matching
Creators: name: Zhang, Xizhe
name: Lv, Tianyang
name: Yang, Xueying
name: Zhang, Bin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Minimum driver node sets (MDSs) play an important role in studying the structural controllability of complex networks. Recent research has shown that MDSs tend to avoid high-degree nodes. However, this observation is based on the analysis of a small number of MDSs, because enumerating all of the MDSs of a network is a #P problem. Therefore, past research has not been sufficient to arrive at a convincing conclusion. In this paper, first, we propose a preferential matching algorithm to find MDSs that have a specific degree property. Then, we show that the MDSs obtained by preferential matching can be composed of high- and medium-degree nodes. Moreover, the experimental results also show that the average degree of the MDSs of some networks tends to be greater than that of the overall network, even when the MDSs are obtained using previous research method. Further analysis shows that whether the driver nodes tend to be high-degree nodes or not is closely related to the edge direction of the network.
title: Bibliothekarische Klassifikationssysteme im semantischen Web: Zu Chancen und Problemen von Linked-Data-Repräsentationen ausgewählter Klassifikationssysteme
Creators: name: Hanke, Mirko
Publisher: name: University Library Heidelberg
Year: 2014

description: Pflege und Anwendung von Klassifikationssystemen für Informationsressourcen sind traditionell eine Kernkompetenz von Bibliotheken. Diese Systeme sind häufig historisch gewachsen und die Veröffentlichung verschiedener Systeme ist in der Vergangenheit typischerweise durch gedruckte Regelwerke oder proprietäre Datenbanken erfolgt. Die Technologien des semantischen Web erlauben es, Klassifikationssysteme in einer standardisierten und maschinenlesbaren Weise zu repräsentieren, sowie als Linked (Open) Data für die Nachnutzung zugänglich zu machen. Anhand ausgewählter Beispiele von Klassifikationssystemen, die bereits als Linked (Open) Data publiziert wurden, werden in diesem Artikel zentrale semantische und technische Fragen erörtert, sowie mögliche Einsatzgebiete und Chancen dargestellt. So kann beispielsweise die für die Maschinenlesbarkeit erforderliche starke Strukturierung von Daten im semantischen Web zum besseren Verständnis der Klassifikationssysteme beitragen und möglicherweise positive Impulse für ihre Weiterentwicklung liefern. Für das semantische Web aufbereitete Repräsentationen von Klassifikationssystemen können unter anderem zur Kataloganreicherung oder für die anwendungsbezogene Erstellung von Konkordanzen zwischen verschiedenen Klassifikations- bzw. Begriffssystemen genutzt werden.
description: Perspektive Bibliothek, Bd. 3, Nr. 2 (2014), Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Bände pro Jahr: 1
Assessing degradation of nano drug carriers - Magnetic particle imaging as a solution
Creators: name: Reisen, Oliver
name: Schoenen, Max
name: Schober, Sven
name: Schmitz-Rode, Thomas
name: Slabu, Ioana
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: Stimulus-triggered drug release by magnetic actuation of nano drug carriers is of high interest for targeted therapies. Most promising candidates are nano formulations based on biodegradable polymers and magnetic nanoparticles (MNP) because they have low side effects and customizable degradation properties. For the control drug release in vivo, monitoring of degradation dynamics play an important role. In this study, we demonstrate the feasibility of measuring degradation state of poly-(lactic-co-glycolic) acid magnetic nanoparticles (PLGA-MNP) using magnetic particle imaging (MPI). We show that due that the immobilization state of MNP during degradation leads to changes in image quality. Further, we test the influence of magnetic fluid hyperthermia on degradation of PLGA-MNP carriers and discuss the effects of degradation on MPI signal.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Beyond substitutive dynamical systems: S-adic expansions
Creators: name: Berthé, Valérie
name: Delecroix, Vincent
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 37B10

description: An S-adic expansion of an infinite word is a way of writing it as the limit of an infinite product of substitutions (i.e., morphisms of a free monoid). Such a description is related to continued fraction expansions of numbers and vectors. A fundamental example of this relation is between Sturmian sequences and regular continued fractions. We study S-adic words from different perspectives, namely word combinatorics, ergodic theory, and Diophantine approximation, by stressing the parallel with continued fraction expansions.
description: 30 pages
Poisson gauge models and Seiberg-Witten map
Creators: name: Kupriyanov, V. G.
name: Kurkov, M. A.
name: Vitale, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The semiclassical limit of full non-commutative gauge theory is known as Poisson gauge theory. In this work we revise the construction of Poisson gauge theory paying attention to the geometric meaning of the structures involved and advance in the direction of a further development of the proposed formalism, including the derivation of Noether identities and conservation of currents. For any linear non-commutativity, $Θ^{ab}(x)=f^{ab}_c\,x^c$, with $f^{ab}_c$ being structure constants of a Lie algebra, an explicit form of the gauge Lagrangian is proposed. In particular a universal solution for the matrix $ρ$ defining the field strength and the covariant derivative is found. The previously known examples of $κ$-Minkowski, $λ$-Minkowski and rotationally invariant non-commutativity are recovered from the general formula. The arbitrariness in the construction of Poisson gauge models is addressed in terms of Seiberg-Witten maps, i.e., invertible field redefinitions mapping gauge orbits onto gauge orbits.
description: 20 pages
New solutions with accelerated expansion in string theory
Creators: name: Dodelson, Matthew
name: Dong, Xi
name: Silverstein, Eva
name: Torroba, Gonzalo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present concrete solutions with accelerated expansion in string theory, requiring a small, tractable list of stress energy sources. We explain how this construction (and others in progress) evades previous no go theorems for simple accelerating solutions. Our solutions respect an approximate scaling symmetry and realize discrete sequences of values for the equation of state, including one with an accumulation point at w=-1 and another accumulating near w=-1/3 from below. In another class of models, a density of defects generates scaling solutions with accelerated expansion. We briefly discuss potential applications to dark energy phenomenology, and to holography for cosmology.
description: 37 pages, 1 figure. v2: comments and references added
From bench to bedside: does a human-sized MPI scanner work with endoprosthesis of the hip and knee?
Creators: name: Augustin, Anne Marie
name: Günther, Johanna
name: Hartung, Viktor
name: Reichl, Teresa
name: Gruschwitz, Philipp
name: Rückert, Martin
name: Bley, Thorsten Alexander
name: Behr, Volker Christian
name: Herz, Stefan
name: Vogel, Patrick
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: Investigation of influence of metallic endoprostheses on MPI functionality in a human-sized MPI scanner. No relevant impairment of imaging from the presence of endoprosthesis could be found.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Lucjan Emil Böttcher (1872-1937)-- the Polish pioneer of holomorphic dynamics
Creators: name: Stawiska, Maĺgorzata
Publisher: name: arXiv
Year: 2013
Subjects: subject: History and Overview (math.HO)
subject: Complex Variables (math.CV)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 01A55, 01A60 (primary), 30D05, 37F10 (secondary)

description: This paper, based in part on joint work with Stanisław Domoradzki, concerns Lucjan Emil Böttcher (1872-1937)-- a little-known Polish mathematician active in Lwów. I outline Böttcher's scholarly path, focusing on his studies in Leipzig with Sophus Lie, his later academic career in Lwów and the hindrances he faced in its advancement. I also describe very briefly his mathematical achievements. In view of later developments in holomorphic dynamics, I argue that, despite flaws in his work, Böttcher should be regarded not only as a contributor to the area but in fact as one of its founders.
description: This is an expanded version of a talk delivered at the conference "Perception of Science in the Central and Eastern Europe in the period 1850-1920", Krak\'ow, Poland, September 20-22, 2013. The talk was intended for mostly non-mathematical audience