cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modellizzazione dei processi di business delle imprese di Telecomunicazioni: le peculiarità della Service Oriented Architecture
Creators: name: Leonardi, Davide
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Lo scenario tecnologico moderno, in relazione all'evoluzione d'impresa, ha comportato una modifica sostanziale  nei processi e nella gestione delle relazioni d'azienda, sia all'interno delle stesse, che all'esterno. Il lavoro analizza il Business Process Management, definibile come l'insieme delle attività fondamentali per definire, monitorare ed ottimizzare i processi aziendali, ed il Business Process Reengineering, intesi come facilitatori aziendali per l'adozione della SOA, la Service Oriented Architecture, definita, innanzitutto, come uno "stile architetturale informatico". L'obiettivo della SOA è garantire l'interoperabilità tra i diversi sistemi, in modo da assicurare l'utilizzo delle singole applicazioni facenti parte del business e soddisfare le richieste della clientela con un processo integrato, trasparente ed efficace.Il lavoro di tesi si conclude con un Business case di una nota azienda di Telecomunicazioni che ha adottato per alcuni web-services la SOA, evidenziando vantaggi legati ai business process e le difficoltà applicative.
Il Welfare State in Europa ed il riconoscimento dei diritti sociali
Creators: name: Camerlingo, Marco
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Il lavoro analizza i sistemi europei di protezione sociale che presentano specificità e peculiarità proprie, riflesso delle diverse esperienze storiche, politiche ed economiche.
Si è svolta inoltre un'attenta analisi dell'ordinamento dell'Unione europea al fine di verificare il grado di riconoscimento che i diritti sociali ricevono in Europa c'est-à-dire la reale tutela giurisdizionale che tali diritti ricevono in sede nazionale e sovranazionale alla quale consegue il riconoscimento o meno della loro effettiva esistenza nei vari ordinamenti dell'Unione: "Un diritto è tale se esiste; ed esso esiste solo se può essere oggetto di tutela giurisdizionale".
Sulla base della ormai affermata ripartizione tra i quattro modelli di stato sociale, il lavoro sintetizza i tratti caratteristici di ciascun sistema e offre una descrizione dei principali programmi di spesa. In particolare, vengono presi in esame gli interventi di riforma più rilevanti intrapresi negli ultimi anni per permettere ai sistemi di welfare state europei di far fronte alle nuove sfide poste dai mutamenti demografici ed economici.
L'approccio improntato al metodo comparatistico porta ad analizzare la normativa in tema di trattamento e protezione dei diritti sociali di derivazione comunitaria tratteggiando somiglianze e differenze con la disciplina adottata neli vari ordinamenti. Lo studio costituisce l'occasione per svolgere alcune interessanti riflessioni che portano alla conclusione che nel panorama giuridico comunitario occorre una maggiore riflessione comparatistica su tale tema.
title: Das I in MINT von Anfang an
title: Bildungsangebote zur informatischen Bildung der Stiftung „Haus der kleinen Forscher“
titleType: Subtitle
Creators: name: Günther, Christine
name: Nenner, Christin
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2021
Subjects: subject: Bildung
subject: Kita
subject: Grundschule
subject: Fortbildung
subject: Blended Learning
subject: forschendes Lernen

description: Informatische Bildung spielt bereits in der Grundschule eine wichtige Rolle, denn Informatiksysteme begegnen Grundschulkindern häufig in ihrem Alltag. Die Kinder bei der Beantwortung ihrer Fragen zu Themen der Informatik nicht allein zu lassen, stellt Pädagoginnen und Pädagogen in Kita, Hort und Grundschule vor die Herausforderung Themen der Informatik in ihre pädagogische Arbeit zu integrieren. In diesem Beitrag wird das Fortbildungsangebot der Stiftung „Haus deer kleinen Forscher“ im Bereich der informatischen Bildung vorgestellt. Das Angebot gibt pädagogischen Fach- und Lehrkräften vielfältige Anregungen für ihre pädagogische Praxis und Hintergründe zu informatischer Bildung.
Curvit: An open-source Python package to generate light curves from UVIT data
Creators: name: Joseph, P.
name: Stalin, C. S.
name: Tandon, S. N.
name: Ghosh, S. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Curvit is an open-source Python package that facilitates the creation of light curves from the data collected by the Ultra-Violet Imaging Telescope (UVIT) onboard AstroSat, India's first multi-wavelength astronomical satellite. The input to Curvit is the calibrated events list generated by the UVIT-Payload Operation Center (UVIT-POC) and made available to the principal investigators through the Indian Space Science Data Center. The features of Curvit include (i) automatically detecting sources and generating light curves for all the detected sources and (ii) custom generation of light curve for any particular source of interest. We present here the capabilities of Curvit and demonstrate its usability on the UVIT observations of the intermediate polar FO Aqr as an example. Curvit is publicly available on GitHub at https://github.com/prajwel/curvit.
description: Accepted for publication in Journal of Astrophysics & Astronomy, 11 pages, 5 figures
title: lebensmittelwarnung.de - Rückrufe und öffentliche Warnungen in Deutschland
title: Ein Einblick in die Arbeit in der Lebensmittelüberwachung
titleType: Subtitle
Creators: name: Wengler, Gregor
name: Lindner, Karim
name: Gleich, Theresa
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2021
Subjects: subject: Lebensmittelsicherheit
subject: Verbraucherschutz
subject: Lebensmittelwarnungen
subject: Lebensmittel
subject: kosmetische Mittel
subject: Bedarfsgegenstände
subject: Spielzeug
subject: Kleidung
subject: Verbraucherwarnung
subject: LFBG
subject: Rückruf
subject: Rücknahme
subject: Verbraucherportal

description: In 2011 hat das Bundesamt für Verbraucherschutz und Lebensmittelsicherheit (BVL) in enger Zusammenarbeit mit den Bundesländern erfolgreich das Informationsportal lebensmittelwarnung.de ins Leben gerufen. Das Portal informiert Verbraucherinnen und Verbraucher über Warnungen und Rückrufe für die Produktkategorien Lebensmittel, kosmetische Mittel und Bedarfsgegenstände wie Spielzeug oder Kleidung. Die Entstehungsgeschichte von lebensmittelwarnung.de sowie die dazugehörigen Meldestrukturen zeigen auf, wie durch kommunikative Strukturen zwischen Bund und Ländern Verbraucherschutz im Alltag koordiniert wird. Aktuell entwickelt das Bundesamt für Verbraucherschutz und Lebensmittelsicherheit (BVL) das Portal zusammen mit Vertreterinnen und Vertretern der Bundesländer weiter. lebensmittelwarnung.de soll gezielter an die Bedürfnisse der Verbraucherinnen und Verbraucher angepasst werden sowie weiterführende Informationen zur Lebensmittelsicherheit im Allgemeinen und aktuellen Ereignissen bieten.
A Survey of Open Clusters in the u'g'r'i'z' Filter System: III. Results for the Cluster NGC 188
Creators: name: Fornal, Bartosz
name: Tucker, Douglas L.
name: Smith, J. Allyn
name: Allam, Sahar S.
name: Rider, Cristin J.
name: Sung, Hwankyung
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We continue our series of papers describing the results of a photometric survey of open star clusters, primarily in the southern hemisphere, taken in the u'g'r'i'z' filter system. The entire observed sample covered more than 100 clusters, but here we present data only on NGC 188, which is one of the oldest open clusters known in the Milky Way. We fit the Padova theoretical isochrones to our data. Assuming a solar metallicity for NGC 188, we find a distance of 1700+/-100 pc, an age of 7.5+/-0.7 Gyr, and a reddening E(B-V) of 0.025+/-0.005. This yields a distance modulus of 11.23+/-0.14.
description: 41 pages, 8 figures. Accepted for publication in the Astronomical Journal
title: Nutzerzentrierte Referenzmodellierung für Nachhaltigkeitskennzahlen
title: Datenstrukturierung für ein transparentes und Stakeholder-orientiertes Informationsangebot von Unternehmen an Investoren als Datennutzer
titleType: Subtitle
Creators: name: Helbig, Raphaela
name: von Höveling, Sven
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2021
Subjects: subject: Referenzmodell
subject: Nutzerzentrierung
subject: Klassifizierung
subject: Nachhaltigkeitsreporting
subject: ESG
subject: Stakeholderorientierung
subject: ESG Disclosure
subject: Nachhaltigkeit

description: Investoren nutzen Nachhaltigkeitsinformationen zunehmend im Rahmen von Investitionsentscheidungen und der Bedarf nach soliden Nachhaltigkeitsbewertungen von Unternehmen steigt. Nachhaltigkeitskennzahlen sind dabei eine wichtige Teilmenge unter den Nachhaltigkeitsinformationen. Jedoch sind hochwertige Daten Mangelware – dies trifft aus das Informationsangebot von Unternehmen und Drittanbietern zu. Dieser Beitrag stellt ein nutzerorientiertes Referenzmodell für die generische Reporting-Struktur von Nachhaltigkeitskennzahlen vor, das dazu beiträgt, dass für Investoren als Datennutzer Nachhaltigkeitsinformationen mit verbesserter Vergleichbarkeit und Qualität erhalten. Die Erarbeitung des Referenzmodells basiert auf einer Interviewstudie. Die Anwendbarkeit des Referenzmodells wird am Beispiel öffentlicher Daten der Volkswagen AG geprüft und kritisch hinsichtlich Informationslücken und Hindernissen diskutiert. Durch die Nutzerorientierung des Referenzmodells wird bezweckt, dass die so geschaffene Bereitstellung transparenter Fakten für Investoren als Nutzer von Nachhaltigkeitsdaten einerseits die Vergleichbarkeit und Qualität dieser Daten für die Weiterverwendung steigert und andererseits Greenwashing durch Unternehmen vorbeugt. Die Arbeit ergänzt die wissenschaftliche Fachliteratur der Wirtschaftsinformatik und des User Experience Designs mit einer nutzerzentrierten Methodik zur Entwicklung eines Daten-Referenzmodells, die explizit vom Mehrwert des Daten-konsumierenden Nutzers ausgeht. Das vorgestellte Referenzmodell für Nachhaltigkeitskennzahlen leistet einen Beitrag in der Fachliteratur zu Stakeholder-orientierter Unternehmensberichterstattung, indem es explizit die Anforderungen Daten-konsumierender Investoren berücksichtigt. Das Referenzmodell ermöglicht gesteigerten Informationsgehalt und eine standardisiert unternehmens-übergreifende Vergleichbarkeit der berichteten Daten.
Interaction-stabilized topological magnon insulator in ferromagnets
Creators: name: Mook, Alexander
name: Plekhanov, Kirill
name: Klinovaja, Jelena
name: Loss, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Condensed matter systems admit topological collective excitations above a trivial ground state, an example being Chern insulators formed by Dirac bosons with a gap at finite energies. However, in contrast to electrons, there is no particle-number conservation law for collective excitations. This gives rise to particle number-nonconserving many-body interactions whose influence on single-particle topology is an open issue of fundamental interest in the field of topological quantum materials. Taking magnons in ferromagnets as an example, we uncover topological magnon insulators that are stabilized by interactions through opening Chern-insulating gaps in the magnon spectrum. This can be traced back to the fact that the particle-number nonconserving interactions break the effective time-reversal symmetry of the harmonic theory. Hence, magnon-magnon interactions are a source of topology that can introduce chiral edge states, whose chirality depends on the magnetization direction. Importantly, interactions do not necessarily cause detrimental damping but can give rise to topological magnons with exceptionally long lifetimes. We identify two mechanisms of interaction-induced topological phase transitions---one driven by an external field, the other by temperature---and show that they cause unconventional sign reversals of transverse transport signals, in particular of the thermal Hall conductivity. We identify candidate materials where this many-body mechanism is expected to occur, such as the metal-organic kagome-lattice magnet Cu(1,3-benzenedicarboxylate), the van der Waals honeycomb-lattice magnet CrI$_3$, and the multiferroic kamiokite (Fe$_2$Mo$_3$O$_8$). Our results demonstrate that interactions can play an important role in generating nontrivial topology.
description: 27 pages, 20 figures
Constructing the off-diagonal part of active-neutrino mass matrix from annihilation and creation matrices in neutrino-generation space
Creators: name: Krolikowski, Wojciech
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The off-diagonal part of the active-neutrino mass matrix is constructed from two $3\times 3$ matrices playing the role of annihilation and creation matrices acting in the neutrino-generation space of $ν_e, ν_μ, ν_τ$. The construction leads to a new relation, $M_{μτ} = 4\sqrt{3} M_{e μ} $, which predicts in the case of tribimaximal neutrino mixing that $m_3 - m_1 = η(m_2 - m_1)$ with $η= 5.28547$. Then, the maximal possible value of ${Δm^2_{32}}/{Δm^2_{21}}$ is equal to $η^2 -1 = 26.9362$ and gives $m_1 = 0$. With the experimental estimate ${Δm^2_{21}}\sim 8.0\times 10^{-5} {\rm eV}^2$, this maximal value, if realized, predicts $Δm^2_{32} \sim 2.2\times 10^{-3} {\rm eV}^2$, near to the popular experimental estimation $Δm^2_{32} \sim 2.4\times 10^{-3} {\rm eV}^2$.
description: 9 pages
The social construction of skill : skill and working knowledge of garment workers in a Vancouver clothing factory
Creators: name: Rauch, Ulrich
Publisher: name: University of British Columbia
Year: 2009

description: An examination of the working knowledge of female garment workers provides the empirical context for the analysis of gendered and racialized notions of skill in a Vancouver garment factory. This thesis problematizes how the labour of garment workers is socially constructed as being of low-value and lowskill, both inside and outside the factory. The social construction of skill on the shopfloor is examined through ethnographic observation of garment construction on the shopfloor and semi-structured interviews with floor-workers, management and union leaders conducted over eight months serve to describe My findings indicate that in spite of managerial strategies that serve to create categories of unskilled work and workers alike, operators act knowledgably and competently on the job. But the social construction of skill, permeated with gendered, racialized and class-based attributions, tends to make invisible the working knowledge of operators. In a contradictory way, being considered skilled turns into a disadvantage for those workers who are expected to perform even more efficiently without increased financial reward. Thus being recognized as more skilled becomes problematic for garment workers. As this study shows skill is a contradictory social construct defined by ideological and political interests. Definitions of skill are as much a reflection of a contradictory labour process as an expression of differential power and privilege. The preservation of power and privilege is in fact the subtext for managerial definitions of skill that render female garment workers as unskilled. This finding points to the need for a critical reflection on the utility of the concept of skill and questions whether skill is a viable concept for explaining and reflecting on the working knowledge of operators, and suggests that notions of tacit skill and working knowledge might be more fruitful. Shortly after my fieldwork ended the plant observed in this study ceased production and moved its operations to a Free Trade Zone in Central America. The same social processes that allow the construction of garment workers as "unskilled" on the Vancouver shopfloor produce even cheaper "unskilled" labour globally.
title: A case of diffuse pneumonic-type lung adenocarcinoma
Creators: name: PANDA, SOURAV
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Chest imaging
subject: Lung
subject: Oncology
subject: CT
subject: Clinical Case

description: Clinical History: A 54-year-old man presented to our hospital with complaints of fever, cough and shortness of breath associated with chronic weight loss and generalized weakness. He was diagnosed as sputum-positive pulmonary tuberculosis outside and was on anti-tubercular drugs since past 2 months.

description: 54 years, male
title: Konzept eines Modells zur ganzheitlichen Datenschutzbetrachtung unter Anwendung von Data Mining
title: Optimierung des Vorgehens zur Dokumentation personenbezogener Daten und Verarbeitungstätigkeiten durch den Einsatz innovativer Technologien
titleType: Subtitle
Creators: name: Gümüs, Can
name: Köhler, Wolfgang
name: Schultz, Christian
name: Rasche, Christoph
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2021
Subjects: subject: Datenschutz
subject: Personenbezogene Daten
subject: Verarbeitungstätigkeiten
subject: Digitalisierung
subject: Data Mining
subject: Künstliche Intelligenz
subject: Cross-Industry Standard Process for Data Mining

description: Während die Digitalisierung weiter voranschreitet und immer größere Datenmengen verarbeitet werden, müssen zeitgleich steigende gesetzliche Anforderungen im Umgang mit Daten, insbesondere zum Schutz der Rechte und Freiheiten natürlicher Personen beachtet werden. Um die gesetzliche Konformität von Datenverarbeitungsprozessen sicherzustellen, sind Organisationen in der Pflicht, Transparenz über Verfahren zur Erfassung und Verarbeitung personenbezogener Daten herzustellen. Unternehmen greifen zunehmend auf innovative Datenanalytik-Technologien zurück, um Analysen großer Datenmengen durchführen zu können und Muster von oder Verbindungen zwischen Daten zu erkennen. Der Beitrag nimmt sich der Optimierung des Dokumentations- und Aktualisierungsprozesses von Verarbeitungstätigkeiten an und befasst sich mit der Entwicklung des Cross-Industry Standard Process for Data Mining Modells (CRISP-DM) zur Wahrung der Konformität durch den Einsatz von Data Mining.
High-Speed Stereo Visual SLAM for Low-Powered Computing Devices
Creators: name: Kumar, Ashish
name: Park, Jaesik
name: Behera, Laxmidhar
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We present an accurate and GPU-accelerated Stereo Visual SLAM design called Jetson-SLAM. It exhibits frame-processing rates above 60FPS on NVIDIA's low-powered 10W Jetson-NX embedded computer and above 200FPS on desktop-grade 200W GPUs, even in stereo configuration and in the multiscale setting. Our contributions are threefold: (i) a Bounded Rectification technique to prevent tagging many non-corner points as a corner in FAST detection, improving SLAM accuracy. (ii) A novel Pyramidal Culling and Aggregation (PyCA) technique that yields robust features while suppressing redundant ones at high speeds by harnessing a GPU device. PyCA uses our new Multi-Location Per Thread culling strategy (MLPT) and Thread-Efficient Warp-Allocation (TEWA) scheme for GPU to enable Jetson-SLAM achieving high accuracy and speed on embedded devices. (iii) Jetson-SLAM library achieves resource efficiency by having a data-sharing mechanism. Our experiments on three challenging datasets: KITTI, EuRoC, and KAIST-VIO, and two highly accurate SLAM backends: Full-BA and ICE-BA show that Jetson-SLAM is the fastest available accurate and GPU-accelerated SLAM system (Fig. 1).
Optical properties of \textit{n}- and \textit{p}-type ZnO thin films -- two different approaches to the impurity distribution inhomogeneity
Creators: name: Makino, Takayuki
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the optical properties of epitaxial \textit{n}- and \textit{p}-type ZnO films grown on lattice-matched ScAlMgO$_4$ substrates. Chemical doping yielded a severe inhomogeneity in a statistical distribution of involved charged impurities. Two approaches are adopted to treat the inhomogeneity effects; Monte Carlo simulation technique for the \textit{n}-doped films, and the fluctuation theory for the \textit{p}-ZnO. The broadening of PL band of \textit{n}-ZnO was significantly larger than predicted by theoretical results in which the linewidths of each individual emissions have been determined mainly from the concentration fluctuation of donor-type dopants by the simulation. Moreover, the rather asymmetrical line shape was observed. To explain these features, a vibronic model was developed accounting for contributions from a series of phonon replicas. In case of \textit{p}-type ZnO:N, analysis of excitation-intensity dependence of the peak shift of donor-acceptor luminescence with a fluctuation model has also proven the importance of the inhomogeneity effect of charged impurity distribution, as in the case of ZnO:Ga. We extracted the inhomogeneity in the sample and acceptor activation energy prepared under the various growth conditions. It is shown that the theoretical results are in good agreement with the experimental 5-K time-resolved luminescence for the systems in a fluctuation field. Finally, localized-state distributions have been studied in N-doped ZnO thin films by means of transient photocurrent measurement.
description: Photonics West 2007
Gravitational wave detection using high precision pulsar observations
Creators: name: Hobbs, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Pulsar timing experiments are reaching sufficient sensitivity to detect a postulated stochastic gravitational wave background generated by merging supermassive black hole systems in the cores of galaxies. We describe the techniques behind the pulsar timing detection method, provide current upper bounds on the amplitude of any gravitational wave background, describe theoretical models predicting the existence of such a background and highlight new techniques for providing a statistically rigorous detection of the background.
description: Accepted for publication in the JPCS issue for the Amaldi 7 proceedings
The covariance of GPS coordinates and frames
Creators: name: Lachieze-Rey, Marc
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore, in the general relativistic context, the properties of the recently introduced GPS coordinates, as well as those of the associated frames and coframes. We show that they are covariant, and completely independent of any observer. We show that standard spectroscopic and astrometric observations allow any observer to measure (i) the values of the GPS coordinates at his position, (ii) the components of his [four-]velocity and (iii) the components of the metric in the GPS frame. This provides to this system an unique value both for conceptual discussion (no frame dependence) and for practical use (involved quantities are directly measurable): localisation, motion monitoring, astrometry, cosmography, tests of gravitation theories. We show explicitly, in the general relativistic context, how an observer may estimate its position and motion, and reconstruct the components of the metric. This arises from two main results: the extension of the velocity fields of the probes to the whole (curved) spacetime; and the identification of the components of the observer's velocity in the GPS frame with the (inversed) observed redshifts of the probes. Specific cases (non relativistic velocities; Minkowski and Friedmann-Lemaître spacetimes; geodesic motions) are studied in details.
description: new version, as to appear in CQG; some equations corrected, redaction improved ; references added
Patterns of channel change on Chilliwack River, British Columbia
Creators: name: Ham, Darren Gary
Publisher: name: University of British Columbia
Year: 2009

description: This study investigates changes to channel morphology along Chilliwack River in southwest British Columbia, and relates these changes to the transport of bed material. The channel was mapped using a stereoplotter from a sequence of historical aerial photography between 1952 and 1991. Maps for selected years were overlaid, then analyzed with a GIS. Erosion and deposition volumes of bed material were determined by multiplying measured planimetric changes by the varying depth of bed material along the river. A sediment budget framework was used to estimate bed material transport rates from these net changes in stored sediment volumes. The transport rate of bed material for Chilliwack River is estimated as 55,000±10,000 m3/yr for the period 1983 to 1991. Instability along lower channel reaches has increased over the 40 year period of study due to an increase in both the magnitude and frequency of large floods. As a consequence, channel width, bank erosion rates and the volume of sediment transported past Vedder Crossing became increasingly large. Between 1952 and 1975, Chilliwack River was in a transient state of equilibrium as the channel continued to recover from a sequence of large floods in previous decades. Large floods in 1975 and 1980 caused significant bank erosion along lower reaches, which increased the amount of sediment available for transport. Extreme floods in 1989 and 1990 caused further erosion, and in fact, were large enough to alter the pre-flood channel regime. However, in the absence of further large floods, the channel should recover from these events in 10 to 20 years. Significant morphologic change on Chilliwack River occurs roughly once every 5 years, when peak flows exceed 500 m3/s. These floods are sufficient to erode channel banks, where the dominant supply of mobile bed material is stored. Aggradation occurs in the short term as more sediment is introduced to the active channel zone than can be removed by subsequent smaller flows. However, as flows as small as 250 m3/s (which occur several times per year, on average) are capable of mobilizing bed material, there is net degradation over the longer term. As the length between survey dates used in this study averaged 10 years, some information on bed material transport between dates is lost. Nonetheless, this study has demonstrated that considerable information on historic channel change can be obtained form aerial photographs.
Antiferromagnetic Spin Fluctuations and the Pseudogap in the Paramagnetic Phases of Quasi-Two-Dimensional Organic Superconductors
Creators: name: Yusuf, Eddy
name: Powell, B. J.
name: McKenzie, Ross H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We give a quantitative analysis of the published results of nuclear magnetic resonance (NMR) experiments for k-(ET)2X family of organic charge transfer salts by using the phenomenological spin fluctuation model of Moriya, and Millis, Monien and Pines (M-MMP). For temperatures above T_NMR ~ 50 K, the model gives a good quantitative description of the data for the paramagnetic metallic phase of several k-(ET)2X materials, with an antiferromagnetic correlation length which increases with decreasing temperature; growing to several lattice constants by T_NMR. It is shown that the fact that the dimensionless Korringa ratio is much larger than unity is inconsistent with a broad class of theoretical models (such as dynamical mean-field theory) which neglect spatial correlations and/or vertex corrections. For materials close to the Mott insulating phase, 1/T1, Ks, and K all decrease significantly with decreasing temperature below T_NMR. This cannot be described by the M-MMP model and the most natural explanation is that a pseudogap opens up in the density of states below T_NMR, as in, for example, the cuprates. We show that the NMR measurements reported for k-(ET)2Cu2(CN)3 are qualitatively inconsistent with this material having a ground state with long range magnetic order. A pseudogap in the metallic state of organic superconductors is an important prediction of the resonating valence bond theory of superconductivity. We propose specific new experiments on organic superconductors to elucidate the nature, origin, and momentum dependence of the pseudogap and its relationship to superconductivity.
description: Two-column format; 24 pages, 6 figures. Longer and unpublished version of arXiv:0705.1382 [Phys. Rev. B 75, 214515 (2007)]
Entropy of entanglement and correlations induced by a quench: Dynamics of a quantum phase transition in the quantum Ising model
Creators: name: Cincio, Lukasz
name: Dziarmaga, Jacek
name: Rams, Marek M.
name: Zurek, Wojciech H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Ising model in one dimension is an exactly solvable example of a quantum phase transition. We investigate its behavior during a quench from a paramagnetic to ferromagnetic phase caused by a gradual turning off of the transverse field at a fixed rate characterized by the quench time $τ_Q$. In agreement with Kibble-Zurek mechanism, quantum state of the system after the transition exhibits a characteristic correlation length $\hatξ$ proportional to the square root of the quench time $τ_Q$. The inverse of this correlation length determines average density of defects after the transition. In this paper, we show that $\hatξ$ also controls the entropy of entanglement of a block of $L$ spins with the rest of the system. For large $L$, this entropy saturates at $\frac16\log_2\hatξ$, as might have been expected from the Kibble-Zurek mechanism. Close to the critical point, the entropy saturates when the block size $L\approx\hatξ$, but -- in the subsequent evolution in the ferromagnetic phase -- a somewhat larger length scale $l=\sqrt{τ_Q}\lnτ_Q$ develops as a result of quantum dephasing, and the entropy saturates when $L\approx l$. We also study the spin-spin correlation. We find that close to the critical point ferromagnetic correlations decay exponentially with the dynamical correlation length $\hatξ$, but in the following evolution this correlation function becomes oscillatory at distances less than this scale. However, both the wavelength and the correlation length of these oscillations are still determined by $\hatξ$. We also derive probability distribution for the number of kinks in a finite spin chain after the transition.
description: 12 pages, 3 figures; updated references and minor cosmetic changes
Analysis, tuning and implementation of neuronal models simulating Hippocampus dynamics
Creators: name: De Michele, Pasquale
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: This work focuses on methods, algorithms and software for computational neuroscience, a research field where several computing strategies are intensively adopted for simulating real biological scenarios. This topic has a strong intersection with the Computer Science to build up frameworks that reproduce neuronal behaviours, coming from laboratory experiments and experiences. A key role is played by the simulation of synaptic mechanisms and neuronal dynamics that regulate the activity of the neurons. The model formalization requires long and deep steps in order to properly tune, through numerical simulations, a large number of biological parameters. These tasks, needed to validate a computational model, represent a well-known critical issue in terms of computing resources, both in time and in memory allocation.

The main target of this PhD Thesis is the study of Hippocampus brain region, devoted to the acquisition of new memory (i.e., storage) and retrieval of previously acquired (i.e., recall). The dissertation starts with an introduction to the biological context and with the state of the art on some single cell and network models. Then, the formalization and the implementation of computational schemes that reproduce typical neuronal phenomena are deeply investigated. More in detail, the depolarization block of a CA1 pyramidal neuron and the effects of the CREB protein activity increasing in a CA1 microcircuit are investigated. For these topics, sequential and parallel code packages, published on the well-known neuroscience repository ModelDB, are implemented. Finally, as a case of study the acquired know-how on the modelling of cell and network dynamics was adopted for reproducing user behaviours in a cultural heritage scenario. Here, the main idea is to measure the interest of an artwork spectator by means of models able to capture the context and the visitor behaviours.
Unconscious priming effect in visual scene with multiscale objects
Creators: name: Vakhrameeva, Olga
name: Harauzov, Alexey
name: Pronin, Sergey
name: Shelepin, Yuri
Publisher: name: F1000Research
Year: 2015

description: Biederman and co-authors (1992, 2001), has shown that the priming effect in the long-time priming paradigm does not depend on the difference in the angular size between the test stimulus and primer. However, in this and in other similar works both with long-time and short-time priming paradigms only a small range of sizes has been studied. In the paper of Vahrameeva et al. (2008), it has been shown that there are two physiologically different size ranges: the size of the objects from 1-1.5 to 50 deg perceived invariant to their angular size, and with a size less than 1-1.5 deg (depending on object class and task) their perception ceases to be invariant. We have investigated the safety of priming effect in match-to-sample task with such a difference in angular size of primer and test stimuli, when the size of the primer (about 4 deg) and test stimulus (about 0.5 deg) lie in different physiological size ranges. The sample stimulus was presented with noise superposition or without it. It has been shown that when the difference in sizes is large the priming effect is reduced. Congruent primer can have a positive impact on the recognition of test objects, but only under very difficult viewing conditions (noisy object is presented) and only in reaction times, but not in performance.
Supported by grant № 14-15-00918 from Russian Scientific Foundation, Pavlov Institute of Physiology
title: Integration von KI-Algorithmen in Umweltinformationssysteme mittels SensorThings API
Creators: name: Hertwck, Philipp
name: van der Schaaf, Hylke
name: Hilbring, Desiree
name: Weis, Jonas
name: Liesch, Tanja
name: Budde, Matthias
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2021
Subjects: subject: Nitratmonitoring
subject: Umweltinformatik
subject: SensorThings API
subject: Künstliche Intelligenz
subject: Algorithmenintegration
subject: Container
subject: Docker

description: Künstliche Intelligenz oder Maschinelles Lernen wird zunehmend in der Umweltdomäne eingesetzt. Eine offene Frage dabei ist, wie entwickelte Algorithmen flexibel in Umweltinformationsysteme integriert werden können. Dieser Artikel befasst sich mit dieser Frage und untersucht den Einsatz des offenen Standards SensorThings API des Open Geospatial Consortiums (OGC) für die Integration von KI-Algorithmen in eine Geodaten-Infrastruktur. Die entwickelte Methode trägt mittels Container-Technologie dem Einsatz unterschiedlicher Technologien und unabhängigen Entwicklergruppen in verteilten Systemen Rechnung. Entwickelt und erprobt wird diese Methode im Projekt NiMo 4.0. Hierfür dient als Beispiel ein Prognose-Algorithmus für die räumliche Vorhersage von Nitrat-Daten.
Quantum Localization in Open Chaotic Systems
Creators: name: Ryu, Jung-Wan
name: Hur, G.
name: Kim, Sang Wook
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a quasi-Floquet state of a $δ$-kicked rotor with absorbing boundaries focusing on the nature of the dynamical localization in open quantum systems. The localization lengths $ξ$ of lossy quasi-Floquet states located near the absorbing boundaries decrease as they approach the boundary while the corresponding decay rates $Γ$ are dramatically enhanced. We find the relation $ξ\sim Γ^{-1/2}$ and explain it based upon the finite time diffusion, which can also be applied to a random unitary operator model. We conjecture that this idea is valid for the system exhibiting both the diffusion in classical dynamics and the exponential localization in quantum mechanics.
description: 4 pages, 4 figures
Production experiment, subject 51
Creators: name: Lau-Preechathammarach, Raksit Tyler
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: kdt

description: Target and distractor stimuli embedded in carrier sentences. Subject is a 54-year-old male. Carried out in a quiet room in the temple of Wat Nakharin in Ban Khi Nak.
title: A Survey of Constraint Transformation Methods
Creators: name: Löffler, Sven
name: Becker, Ilja
name: Kroll, Franz
name: Hofstedt, Petra
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2021
Subjects: subject: Constraint Programming
subject: CSP
subject: Refinement
subject: Optimization
subject: Regular Membership Constraint
subject: Regular CSPs
subject: Table Constraint
subject: SAT
subject: Binary Constraint

description: The solution performance of finite domain (FD) constraint problems can often be improved by either transforming particular constraints or sub-problems into other FD constraints like binary, table or regular membership constraints, or by transformation of the complete FD problem into an equivalent problem but of another domain, e.g. in a SAT problem. Specialized constraint solvers (like binary or SAT solvers) can outperform general constraint solvers for certain problems. However, this comes with high efforts for the transformation and/or other disadvantages such as a restricted set of constraints such specialized solvers can handle or limitations on the variables domains. In this paper we give an overview of CSP and constraint transformations and discuss applicabilibty and advantages and disadvantages of these approaches.
Towards a Quantum Computing Algorithm for Helicity Amplitudes and Parton Showers
Creators: name: Bepari, Khadeejah
name: Malik, Sarah
name: Spannowsky, Michael
name: Williams, Simon
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The interpretation of measurements of high-energy particle collisions relies heavily on the performance of full event generators. By far the largest amount of time to predict the kinematics of multi-particle final states is dedicated to the calculation of the hard process and the subsequent parton shower step. With the continuous improvement of quantum devices, dedicated algorithms are needed to exploit the potential quantum computers can provide. We propose general and extendable algorithms for quantum gate computers to facilitate calculations of helicity amplitudes and the parton shower process. The helicity amplitude calculation exploits the equivalence between spinors and qubits and the unique features of a quantum computer to compute the helicities of each particle involved simultaneously, thus fully utilising the quantum nature of the computation. This advantage over classical computers is further exploited by the simultaneous computation of s and t-channel amplitudes for a 2$\rightarrow$2 process. The parton shower algorithm simulates collinear emission for a two-step, discrete parton shower. In contrast to classical implementations, the quantum algorithm constructs a wavefunction with a superposition of all shower histories for the whole parton shower process, thus removing the need to explicitly keep track of individual shower histories. Both algorithms utilise the quantum computer's ability to remain in a quantum state throughout the computation and represent a first step towards a quantum computing algorithm to describe the full collision event at the LHC.
description: 31 pages, 15 figures
The OCON model: an old but green solution for distributable supervised classification for acoustic monitoring in smart cities
Creators: name: Giacomelli, Stefano
name: Giordano, Marco
name: Rinaldi, Claudia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: C.2.4; C.2.5; C.2.6; C.3; B.8.2; C.4; D.2.8; D.2.13; H.3.1; I.2.4; I.2.6; I.2.7; I.2.8; I.2.11; I.5.1; I.5.4; I.5.5; J.5; J.7; K.4.0
subject: 68T05, 68T07, 68T10, 68T30, 68T50

description: This paper explores a structured application of the One-Class approach and the One-Class-One-Network model for supervised classification tasks, focusing on vowel phonemes classification and speakers recognition for the Automatic Speech Recognition (ASR) domain. For our case-study, the ASR model runs on a proprietary sensing and lightning system, exploited to monitor acoustic and air pollution on urban streets. We formalize combinations of pseudo-Neural Architecture Search and Hyper-Parameters Tuning experiments, using an informed grid-search methodology, to achieve classification accuracy comparable to nowadays most complex architectures, delving into the speaker recognition and energy efficiency aspects. Despite its simplicity, our model proposal has a very good chance to generalize the language and speaker genders context for widespread applicability in computational constrained contexts, proved by relevant statistical and performance metrics. Our experiments code is openly accessible on our GitHub.
description: Accepted at "IEEE 5th International Symposium on the Internet of Sounds, 30 Sep / 2 Oct 2024, Erlangen, Germany"
The ULX Source X-3 in NGC 4258: A Search for Its X-ray and Optical Properties
Creators: name: Akyuz, A.
name: Avdan, S.
name: Allak, S.
name: Aksaker, N.
name: Oralhan, İ. Akkaya
name: Balman, Ş.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results of a search for the nature of ultraluminous X-ray source (ULX) X-3 in the nearby galaxy NGC 4258. We use archival data from {\it XMM-Newton}, {\it Chandra}, {\it NuSTAR} and {\it HST} observations. Total X-ray data analysed to find the model parameters of the system is indicative of a stellar mass black hole, $\sim$ 10 M$_{\sun}$, as the central compact object. Furthermore, analyses of the optical data from {\it HST} reveal two optical candidates with the 90 per cent confidence level of error radius of 0$\farcs$28. Assuming the optical emission is dominated by the donor star, both of these candidates are found to have spectral types that lie between B3$-$F1 with absolute magnitudes of $M_{\rm V}$ $\approx$ -6.4. Moreover, the age and mass estimates for the candidates are found to be of 10 and 18 Myr and of 13 and 20 M$_{\sun}$, respectively.
description: Accepted for publication in MNRAS, 15 pages, 8 figures, 7 tables
title: Optimization of spray pyrolysis for cathode-supported solid oxide fuel cells
Creators: name: Tsimekas, Georgios
Publisher: name: University of St Andrews
Year: 2019

description: Cathode-supported solid oxide fuel cells (SOFCs) have been the most reliable devices for direct conversion of fuels in electrical power. However, processing at high temperatures to obtain a gas-tight electrolyte is prohibited due to formation of interfacial secondary phases between the electrolyte and the cathode support. Various deposition techniques such as electrochemical vapor deposition have been successfully employed to deposit thin electrolytes, but with a high cost. Therefore, a fabrication method that can meet the requirements of an industrial application at lower cost is the key for commercialization of this type of SOFCs. The aim of this study was to optimize air-pressurized spray pyrolysis technique for preparation of ultra-thin and dense electrolytes at low temperatures, for cathode-supported SOFCs. This process is cost-effective and easy scalable, suitable for deposition of thin films over large areas. Cathode-supported SOFCs were developed with thin 3.5-5.5μm yttria-stabilized zirconia (YSZ) electrolytes of columnar structure, at deposition temperatures as low as 170°C and deposition rates ≥10 μm h⁻¹. The surface of the composite LSM-YSZ cathode support was modified by spraying a LSM interlayer to reduce the roughness of the substrate and thus, secure a uniform thickness of the post-deposited electrolyte layer. To complete the cell with an anode electrode, cobalt ceria Co-CeO₂ with mixed ionic-electronic conductivity (MIEC) was also deposited by spray pyrolysis. Optimization of spray pyrolysis process parameters revealed the precursor concentration in conjunction with deposition time as the most important parameters to shift the morphology of the film from dense to porous depended on the target film structure. Sintering, from 750°C up to 950°C, proved to suppress the formation of zirconate phases at the interface of the YSZ/LSM that would severely degrade the performance of the cell. The cathode-supported SOFCs were electrochemically tested using 5%H₂/Ar as fuel and air as oxidant within a temperature range of 700-850°C. The measured open circuit voltage values were close to the theoretical ones with a maximum of 1.002 V at 850°C, indicating a gas-tight electrolyte. A power density of 127 mW/cm² at 850°C for a cathode-supported SOFC with a 3.5 μm thick YSZ electrolyte, was achieved. The activation energy of the whole cell was 0.15 eV corroborating the actual ohmic resistance values correspond to the cathode support which is the limiting factor of the cell's performance. Long-term stability test of five days showed a performance degradation to 83 mW/cm² at 850°C due to particle agglomeration of the cobalt metal in the anode electrode and reduction of the catalytic active area. The above indicate spray pyrolysis is an established technique for preparation of thin films for use in cathode-supported SOFCs.
VLT/UVES constraints on the carbon isotope ratio 12C/13C at z=1.15 toward the quasar HE 0515-4414
Creators: name: Levshakov, S. A.
name: Centurion, M.
name: Molaro, P.
name: Kostina, M. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyzed the CI lines associated with the damped Ly-alpha system observed at zabs = 1.15 in the spectrum of HE 0515-4414 to derive the 12C/13C ratio. The spectrum was obtained by means of the UV-Visual Echelle Spectrograph (UVES) at the ESO Very Large Telescope (VLT). The obtained lower limit 12C/13C > 80 (2sigma C.L.) shows for the first time that the abundance of 13C in the extragalactic intervening clouds is very low. This rules out a significant contribution from intermediate-mass stars to the chemical evolution of matter sampled by this line of sight. The estimated low amount of 13C is in agreement with low abundances of nitrogen observed in damped Ly-alpha systems - the element produced in the same nuclear cycles and from about the same stars as 13C.
description: 4 pages, 3 figures, published in A&A, 447, L21-L24, 2006