cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Die Islamische Revolution in Iran als Gegenstand der politischen Bildung und als Herausforderung für den sozialwissenschaftlichen Unterricht : Untersuchungen zum Paradigmenwandel in der politischen Bildung und zum Diskurs in der Politikdidaktik
Creators: name: Voigt, Gerhard
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Teaching political science
subject: discursive methods and teaching
subject: islamic revolution in Iran
subject: Politikdidaktik
subject: Diskursdidaktik
subject: Islamische Revolution in Iran
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::320 | Politik

description: [no abstract]
Simulations of High-order Nonlinear Optical Spectra on Polymers of Three-level Systems
Creators: name: Berger-Malette, Grégoire Zachary Aubert Laurier
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: nonlinear optical spectroscopy
computational physics

description: This thesis describes the computational tools that allow the simulation of polymers made up of an arbitrary number of three-level systems, the study of such systems and comparisons to experimental nonlinear optical spectra. The three-level system generator (3LSG), is designed to automatically generate the operators that describe the system, whether it is a closed system or an open quantum system (OQS) in contact with a bath, with just a few input parameters. A user is free to specify each 3LS's energy levels and transition dipoles between said levels, site couplings between the different units of the polymer and in the case of open systems, the rates and couplings describing the different relaxation processes taking place in an OQS, using the Redfield formalism. In either cases, the 3LSG is then capable of generating the Hamiltonian 𝐻₀ describing the closed system or the Liouvillian 𝓛₀ describing the open system from the various inputs. The Ultrafast Spectroscopy Suite (UFSS) is an open-source software suite used to perform the nonlinear optical spectroscopies simulations. It contains 4 main modules, one of which is the Hamiltonian/Liouvillian Generator (HLG), a module previously designed to model simpler two-level systems. The 3LSG is a sub-module of the HLG. The three-level system generator is used to replicate a theoretical model describing a copolymer model made of many identical pairs of squaraine monomers, where each monomer is a three-level system interacting with its neighbouring sites and a surrounding bath. The system automatically generated by the 3LSG is used, along with other spectroscopic calculation tools, to simulate high-order transient absorption (TA) spectroscopies and study the long-time behaviour of the 3rd-order to 13th-order excited state absorption (ESA) peaks in the TA signals. The 3LSG is used in conjunction with spectroscopic calculations tools as it was originally intented, though it may also be used by itself to study Hamiltonians and Liouvillians of electronic three-level systems.
Untersuchungen zur Toxizität unterschiedlicher Nanomaterialien auf verschiedene Zelllinien, mesenchymale Stammzellen und 3D-Gewebestrukturen
Creators: name: Wagner, Stefanie
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Zinc oxide nanoparticles
subject: titanium dioxide nanoparticles
subject: silver nanoparticles
subject: cytotoxicity
subject: 3D-tissue structures
subject: apoptosis
subject: necrosis
subject: Zinkoxidnanopartikel
subject: Titandioxidnanopartikel
subject: Silbernanopartikel
subject: Zytotoxizität
subject: 3D-Gewebestrukturen
subject: ECIS
subject: Apoptose
subject: Nekrose
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Variability survey in the CoRoT SRa01 field: Implications of eclipsing binary distribution on cluster formation in NGC 2264
Creators: name: Klagyivik, P.
name: Csizmadia, Sz.
name: Pasternacki, T.
name: Fruth, T.
name: Erikson, A.
name: Cabrera, J.
name: Chini, R.
name: Eigmüller, P.
name: Kabath, P.
name: Kirste, S.
name: Lemke, R.
name: Murphy, M.
name: Rauer, H.
name: Titz-Weider, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Time-series photometry of the CoRoT field SRa01 was carried out with the Berlin Exoplanet Search Telescope II (BEST II) in 2008/2009. A total of 1,161 variable stars were detected, of which 241 were previously known and 920 are newly found. Several new, variable young stellar objects have been discovered. The study of the spatial distribution of eclipsing binaries revealed the higher relative frequency of Algols toward the center of the young open cluster NGC 2264. In general Algol frequency obeys an isotropic distribution of their angular momentum vectors, except inside the cluster, where a specific orientation of the inclinations is the case. We suggest that we see the orbital plane of the binaries almost edge-on.
description: 18 pages, 8 figures, accepted for publication in ApJ
Potentiale und Limitationen von GKV-Routinedaten
Creators: name: Zeidler, Jan
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Health economic evaluations
subject: claims data
subject: secondary data analysis
subject: Gesundheitsökonomische Evaluationen
subject: GKV-Routinedaten
subject: Sekundärdatenanalysen
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Nonlinear electrohydrodynamics of a viscous droplet
Creators: name: Salipante, Paul F.
name: Vlahovska, Petia M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A classic result due to G.I.Taylor is that a drop placed in a uniform electric field becomes a prolate or oblate spheroid, which is axisymmetrically aligned with the applied field. We report an instability and symmetry-breaking transition to obliquely oriented, steady and unsteady shapes in strong fields. Our experiments reveal novel droplet behaviors such as tumbling, shape oscillations, and chaotic dynamics even under creeping flow conditions. A theoretical model, which includes anisotropy in the polarization relaxation due to drop asphericity and charge convection due to drop fluidity, elucidates the interplay of interfacial flow and charging as the source of the rich nonlinear dynamics.
Entwicklung von Katalysatoren für den Einsatz in der HT-PEM-Brennstoffzelle
Creators: name: Herrmann, Mirko
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2015
Subjects: subject: Fuel cell
subject: catalyst
subject: PEM
subject: Brennstoffzelle
subject: Katalysatoren
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Bridging from Multi-dimensionality of Idioms to Their Embodiment
Creators: name: Morid, Mahsa
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: Idiom processing
event-related potentials
self-paced reading
familiarity
literal plausibility
valence
arousal
concreteness
imageability

description: In this thesis, I investigate idiom processing from two angles through three different studies. First, I approached idiom processing from a constraint-based perspective. According to this view, not all idioms are alike: they can differ regarding lexical, and linguistic characteristics, such as their level of familiarity. In this first study, I investigated the underlying processes during the comprehension of idioms with different characteristics. I used the Event Related Potential (ERP) technique, which has high temporal resolution, to investigate this issue. I provided evidence that idioms' characteristics impact their processing. More specifically, idioms which are more familiar to language users (i.e., the ones that are encountered more frequently) showed processing facilitation compared to less familiar idioms. Also, idioms with plausible literal interpretation showed processing advantages over idioms which are less likely to be interpreted literally. The second aim of the current thesis was to investigate idiom processing from an embodied account of language processing. According to this view, various sources of information (including linguistic, affective, and sensory-motor) are available and used during the comprehension of language. While, this view has become popular in many language processing studies, studies of idiom processing are still at the beginning of this journey. To be able to investigate idiom processing while considering the role of affective and sensory-motor factors, we require access to norming data. In the second (descriptive) study, I conducted a large-scale survey and collected measures of valence, arousal, concreteness, and imageability for a set of English idioms, by both native speakers of English and proficient second language speakers. In the last study, I explored how the emotional status of idioms and their concreteness contributes to their processing, and whether this contribution is modulated by idiom familiarity. We found that the impact of non-linguistic sources of information (affective and sensory-motor) is determined by idiom familiarity, such that low familiar and high familiar idioms show different behaviour where these factors are concerned. For highly familiar idioms, behaviour aligns with the findings on word processing: for example, idioms with more positive valence showed facilitative processing. Unlike highly familiar idioms, valence had an inhibitory impact on idioms with low familiarity level, such that greater valence increased the reading time.
GPU Scripting and Code Generation with PyCUDA
Creators: name: Klöckner, Andreas
name: Pinto, Nicolas
name: Catanzaro, Bryan
name: Lee, Yunsup
name: Ivanov, Paul
name: Fasih, Ahmed
Publisher: name: arXiv
Year: 2013
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: High-level scripting languages are in many ways polar opposites to GPUs. GPUs are highly parallel, subject to hardware subtleties, and designed for maximum throughput, and they offer a tremendous advance in the performance achievable for a significant number of computational problems. On the other hand, scripting languages such as Python favor ease of use over computational speed and do not generally emphasize parallelism. PyCUDA is a package that attempts to join the two together. This chapter argues that in doing so, a programming environment is created that is greater than just the sum of its two parts. We would like to note that nearly all of this chapter applies in unmodified form to PyOpenCL, a sister project of PyCUDA, whose goal it is to realize the same concepts as PyCUDA for OpenCL.
Doubly substituted isotopologues of HCCCN in TMC-1: Detection of D13CCCN, DC13CCN, DCC13CN, DCCC15N, H13C13CCN, H13CC13CN, HC13C13CN, HCC13C15N, and HC13CC15N
Creators: name: Tercero, B.
name: Marcelino, N.
name: Roueff, E.
name: Agúndez, M.
name: Cabezas, C.
name: Fuentetaja, R.
name: de Vicente, P.
name: Cernicharo, J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the first detection in space of a complete sample of nine doubly substituted isotopologues of HCCCN towards the cyanopolyyne peak of TMC-1 using observations of the QUIJOTE line survey taken with the Yebes 40 m telescope. We detected D13CCCN, DC13CCN, DCC13CN, DCCC15N, H13C13CCN, H13CC13CN, HC13C13CN, HCC13C15N, and HC13CC15N through their J=4-3 and J=5-4 lines in the 7 mm window. In addition, we present an extensive analysis of the emission of HCCCN and its singly substituted isotopologues through a large velocity gradient model of the lines detected at 7 mm and 3 mm using the Yebes 40 m and the IRAM 30 m telescopes, respectively. The derived column densities for all the isotopologues are consistent in the two spectral bands for an H2 volume density of 1e4 cm-3 and a kinetic temperature of 10 K. Whereas we observed a 13C fractionation for HCC13CN and other double isotopologues with a 13C atom adjacent to the nitrogen atom, we derived similar C/13C abundance ratios for the three 13C substituted species of DCCCN. This suggests additional chemical discrimination for deuterated isotopologues of HCCCN. Finally, we present the spatial distribution of the J=4-3 and J=5-4 lines from the singly substituted species observed with the Yebes 40 m telescope. The emission peak of the spatial distribution of DCCCN appears to be displaced by 40'' with respect to that of HCCCN and the 13C and 15N isotopologues. In addition to a different formation route for the deuterated species, we could also expect that this differentiation owing to the deuterium fractionation is more efficient at low temperatures, and therefore, that deuterated species trace a colder region of the cloud.
description: Accepted for publication in A&A
Deep Learning Based Drone Localization and Payload Detection Using Vision Data
Creators: name: Azad, Hamid
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: Drone
Uncrewed (Unmanned) Aerial Vehicle (UAV)
Deep learning
Localization
Payload detection
Vision

description: Uncrewed aerial vehicles (UAVs), commonly known as drones, have become increasingly prevalent in various applications. However, the localization and payload detection of drones is crucial for ensuring safety and security. This thesis proposes a vision-based solution using deep learning techniques to address these challenges. Existing solutions like radars and acoustic sensors have limitations, including high costs, limited accuracy, and the need for prior knowledge of the drone's model. Normal radars lack angle estimation accuracy and rely on known micro-Doppler features for payload detection, while acoustic sensors are restricted to close ranges for payload analysis. In contrast, cameras offer a cost-effective alternative as they have become widely available and can capture visual data. In addition, due to resource constraints, mounting multiple sensors on the UAV along with the camera is impractical, making reliance on cameras alone essential for addressing the mentioned problems. Recent advancements in deep learning algorithms enable regression and classification tasks, making vision data a promising choice for solving drone localization and payload detection problems. The proposed solution leverages convolutional neural networks (CNNs) for regression tasks, estimating the distance of a drone from the captured image. The CNN takes a cropped image within the drone's bounding box as input and outputs the estimated distance. Additionally, the drone's azimuth and elevation angles have been estimated based on its position in the captured image using a simple pinhole model for the camera. Also, the ResNet and EfficientNet classifiers could accurately classify drones as loaded or unloaded, even without prior knowledge of their shape. Due to a scarcity of publicly available datasets, this study developed the first air-to-air simulated dataset specifically for the classification of loaded versus unloaded drones. To evaluate the performance of the proposed solution, both simulated and experimental tests were conducted. The results showcased promising accuracy, with a root mean square error (RMSE) of less than 10 meters for distance estimation and an RMSE of less than 3 degrees for angle estimation. Furthermore, the payload detection problem was effectively addressed, achieving a classification accuracy of over 85\% for distinguishing between loaded and unloaded drones using the trained network based on the simulated dataset. The numerical highlights demonstrate the effectiveness of using camera sensors for 3D localization, with accurate distance and angle estimations. The high accuracy achieved in payload classification showcases the potential of the proposed solution for detecting drone payloads at distances up to 100 meters. These results pave the way for enhanced safety and security in drone environments.
"Enabling Technologien" in der organischen Synthese : induktives Heizen und Durchflussreaktionen ; Totalsynthese von Millingtonine A
Creators: name: Wegner, Jens
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Microreactors
subject: nanoparticles
subject: magnetic induction
subject: multistep-multicomponent-synthesis
subject: heterocycles
subject: total synthesis
subject: Mikroreaktoren
subject: Nanopartikel
subject: magnetische Induktion
subject: Gold
subject: Oxidation
subject: Mehrstufen-Mehrkomponenten-Synthese
subject: Heterozyklen
subject: Totalsynthese
subject: Millingtonine A
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Extracting sigma_effective from the CDF gamma+3jets measurement
Creators: name: Bähr, Manuel
name: Myska, Miroslav
name: Seymour, Michael H.
name: Siodmok, Andrzej
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In their 1997 paper, CDF measured sigma_effective, the normalization factor that relates the cross section for double parton scattering to the product of the inclusive cross sections of the two individual scatters, in a model in which they are assumed to be independent. In his 2007 paper, Treleani pointed out that CDF used a non-standard definition, in which the double parton scattering cross section corresponds to exactly two scatters, rather than the more conventional one in which it is the inclusive two-scatter cross section. He also estimated the correction from one definition to the other, to give a corrected value of sigma_effective. Treleani's form would be correct under the assumption that CDF were able to uniquely identify and count the number of scatters in an event, which is certainly not the case. In this publication we consider CDF's event definition in more detail to provide an improved correction.
description: 19 pages
Aachener Kunstblätter des Museumsvereins Herausgegeben im Auftrage des Vorstandes von Peter Ludwig. Schriftleitung Ernst Günther Grimme
Creators: name: Redaktion, Die
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 26 (1962): Aachener Kunstblätter
Identifizierung und Charakterisierung potentieller Wirkstoffe, welche die Inhibierung von Cdk2 durch p27Kip1 aufzuheben vermögen
Creators: name: Weninger, Gunnar
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Cell cycle
subject: drug development
subject: p27
subject: Zellzyklus
subject: Wirkstoffentwicklung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Positionsgeberloser Betrieb von permanentmagneterregten Synchronmaschinen
Creators: name: Wiedmann, Karsten
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Self-sensing control
subject: sensorless control
subject: permanent magnet synchronous machine
subject: Positionsgeberlose Regelung
subject: sensorlose Regelung
subject: permanentmagneterregte Synchronmaschine
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: [no abstract]
Globularia nudicaulis L. Cat.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: G. nudicaulis L. Cat. 303 und 431. l: Grammont, Nordseite (Briquet); Col de Lovenex (J.).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Kant's Theory of Simultaneity
Creators: name: Al-Fadli, Ageel
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: Kant
simultaneity
Newton
time
Leibniz
Einstein
physics
Third Analogy
Community

description: In this thesis, I examine Kant's conception of simultaneity in relation to the idea of the empirical determinacy of time. I begin by introducing the concepts of time and simultaneity in Newton and Leibniz, and demonstrate how these two modern conceptions of time contributed to Kant's understanding of simultaneity and cosmological unity. It will be argued that Kant's conception of simultaneity was intended to account for the possibility of the rational determination of time, and that for this purpose, Kant sought to reinterpret the Principle of Sufficient Reason in his early writings by linking it to the simultaneity-relation between substances in reciprocal interaction, thus arguing for the possibility of coexistence between substances. This provides a way to understand how the unity of the world is fundamental to Kant's understanding of the rational determination of time and space. In Kant's critical period the relation of simultaneity is analysed as empirically realized through mutual interaction, but the pure manifold of time is thought to be intuitional, which requires the implementation of relational categories in order to be reproduced in experience. In the Third Analogy of the First Critique, the concept of mutual interaction is analysed in terms of balanced forces, which provides a means of describing the evolution of a dynamical system over time. It provides the process by which the connection between different dynamical systems is possible, and also for the synchronization of different clocks.
A Multi-Phase-Field Anisotropic Damage-Plasticity Model for Crystalline Rocks
Creators: name: Sun, WaiChing
name: Na, SeonHong
Publisher: name: Columbia University
Year: 2018
Subjects: Plasticity
Crystals--Plastic properties
Salt
Anisotropy
Geotechnical engineering

description: Many engineering applications, such as geological disposal of nuclear
waste, require reliable predictions on the thermo-hydro-mechanical responses of
porous media exposed to extreme environments. This presentation will discuss the
relevant modeling techniques designed specifically for such environmental conditions.
In particular, we will provide an overview of the coupling method of crystal
plasticity and multi-phase-field model designed to replicate the thermal- and rate-dependent
damage-plasticity of crystalline rock. Special emphasis is placed on
capturing the intrinsic anisotropy of salt grain in 3D with respect to damage behavior
and plastic flow by incorporating the crystallographic information of salt.
Symmetrieabhängige Frequenzverschiebungen in Atomuhren
Creators: name: Will, Johannes
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Ultracold quantum gases
subject: collisional clock shift
subject: atomic clocks
subject: Ultrakalte Quantengase
subject: dichteabhängige Uhrenverschiebung
subject: Atomuhren
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Unbezahlte Arbeit und Stadtentwicklung : Produktivität, Widerständigkeit und Wirkmächtigkeit des Alltäglichen
Creators: name: Vellay, Irina
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Urban development
subject: unpaid work
subject: the commons
subject: customary rights
subject: Stadtentwicklung
subject: unbezahlte Arbeit
subject: Allmenden
subject: Gemeingebrauch
subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::710 | Landschaftsgestaltung, Raumplanung

description: [no abstract]
Modales Netzwerkmodell für 3D-Verbindungsstrukturen basierend auf der quasistatischen Feldintegralgleichung
Creators: name: Bednarz, Christian
name: Leone, Marco
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Verbindungsstrukturen
subject: Abstrahlung
subject: Netzwerkmodell
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Verbindungsstrukturen sind ein essentieller Bestandteil elektronischer Geräte, z.B. auf Leiterplatten, in Übertragungsleitungen und Bussystemen. Aufgrund hoher Schaltfrequenzen und steiler Schaltflanken können auch kleine Strukturen elektrisch groß sein und ein komplexes Hochfrequenzverhalten einschließlich Abstrahlung aufweisen, das während der Entwicklung berücksichtigt werden muss. Vor kurzem wurde ein breitbandiges Foster-Netzwerkmodell für beliebig geformte Dünndrahtstrukturen mit moderaten Verlusten vorgestellt [1, 2, 3]. In diesem Beitrag stellen wir einen erweiterten Ansatz vor, der metallische Oberflächen sowie die Anbindung von Drähten an diese einschließt. Basierend auf der quasistatischen Momentenmethode (MoM) wird über die Lösung des entsprechenden Eigenwertproblems eine Admittanzdarstellung für leitende Strukturen abgeleitet. Für die bei üblichen MoM-Formulierungen unsymmetrischen Systemmatrizen wird die Eigenschaft der Biorthogonalität ausgenutzt und das damit verbundene adjungierte Eigenwertproblem zusätzlich gelöst. Somit muss nicht wie in [1] das Galerkin-Verfahren verwendet werden, wodurch alternative Testfunktionen genutzt werden können. Eine Reduktion der Modellordnung wird durch Extraktion statischer Kapazitäten und Induktivitäten erreicht, wodurch die Größe des Modells minimiert wird. Moderate Strahlungsverluste werden durch modale Widerstände im Netzwerk berücksichtigt. Darüber hinaus lässt sich die Einkopplung von externen Feldern sowohl im Frequenz- als auch im Zeitbereich durch zusätzliche modale Quellen einfach mit einbeziehen. Ausgehend von einer vorgegebenen Bandbreite kann die erforderliche Modellordnung direkt abgeschätzt werden. Die Stabilität für Zeitbereichssimulationen mit beliebigen, nichtlinearen Lasten ist stets garantiert. Abschließend wird das Modell anhand eines Beispiels im Frequenz- und Zeitbereich validiert.
Entwicklung von Direct Power Injection Platinen zur Bestimmung der Beeinträchtigung von Mikrocontrollern aufgrund von IEMI bis 1 GHz in Leiterbahnstrukturen
Creators: name: Burghardt, Felix
name: Garbe, Heyno
name: Bohse, Johannes
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: elektromagnetische Beeinflussung
subject: IEMI
subject: Störfestigkeit
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Verbindungsstrukturen sind ein essentieller Bestandteil elektronischer Geräte, z.B. auf Leiterplatten, in Übertragungsleitungen und Bussystemen. Aufgrund hoher Schaltfrequenzen und steiler Schaltflanken können auch kleine Strukturen elektrisch groß sein und ein komplexes Hochfrequenzverhalten einschließlich Abstrahlung aufweisen, das während der Entwicklung berücksichtigt werden muss. Vor kurzem wurde ein breitbandiges Foster-Netzwerkmodell für beliebig geformte Dünndrahtstrukturen mit moderaten Verlusten vorgestellt [1, 2, 3]. In diesem Beitrag stellen wir einen erweiterten Ansatz vor, der metallische Oberflächen sowie die Anbindung von Drähten an diese einschließt. Basierend auf der quasistatischen Momentenmethode (MoM) wird über die Lösung des entsprechenden Eigenwertproblems eine Admittanzdarstellung für leitende Strukturen abgeleitet. Für die bei üblichen MoM-Formulierungen unsymmetrischen Systemmatrizen wird die Eigenschaft der Biorthogonalität ausgenutzt und das damit verbundene adjungierte Eigenwertproblem zusätzlich gelöst. Somit muss nicht wie in [1] das Galerkin-Verfahren verwendet werden, wodurch alternative Testfunktionen genutzt werden können. Eine Reduktion der Modellordnung wird durch Extraktion statischer Kapazitäten und Induktivitäten erreicht, wodurch die Größe des Modells minimiert wird. Moderate Strahlungsverluste werden durch modale Widerstände im Netzwerk berücksichtigt. Darüber hinaus lässt sich die Einkopplung von externen Feldern sowohl im Frequenz- als auch im Zeitbereich durch zusätzliche modale Quellen einfach mit einbeziehen. Ausgehend von einer vorgegebenen Bandbreite kann die erforderliche Modellordnung direkt abgeschätzt werden. Die Stabilität für Zeitbereichssimulationen mit beliebigen, nichtlinearen Lasten ist stets garantiert. Abschließend wird das Modell anhand eines Beispiels im Frequenz- und Zeitbereich validiert.
Literature of Recovery ASEAN Economy through a Sustainable Tourism Sector in the Post COVID-19
Creators: name: Kibtiah, Tia Mariatul
Publisher: name: Zenodo
Year: 2024

description: The following text contains literature regarding the economic recovery of ASEAN after COVID-19. Our research is unique because it focuses on the recovery of sustainable tourism in the environmental sector. We have chosen to study three countries - Indonesia, Malaysia, and Thailand - as they have ASEAN's most significant tourism sectors. Our findings show that Thailand has been the most successful in revitalizing its economy in the tourism sector, providing a unique and essential insight for our audience.
Methoden zur Untersuchung von Einflussparametern im Messaufbau von gestrahlten Emissions-messungen im Komponententest nach CISPR 25
Creators: name: Schabel, Jan
name: Beltle, Michael
name: Tenbohlen, Stefan
name: Kull, Martin
name: Zerrer, Michael
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: CISPR 25
subject: Norm
subject: Bus-System
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Seit der Einführung der Norm CISPR 25 im Jahr 1995 hat die Komplexität der Steuergeräte und Kabelbäume signifikant zugenommen. Gleichzeitig steigt die Vernetzung der Steuergeräte untereinander, wodurch oft mehrere gleiche oder unterschiedliche Bus-Systeme in ein und demselben Steuergerät vorhanden sind. Für die Messung der gestrahlten Emissionen einer Fahrzeugkomponente wird diese über eine Leitung (Prüfkabelbaum) mit einer Lastnachbildung verbunden [1]. Ein Steuergerät kann aber nur dann richtig getestet werden, wenn alle für den Betrieb notwendigen Informationen vorhanden sind. Bei Prüflingen mit Bus-System muss daher auch eine aktive Kommunikation auf dem Bus möglich sein. Da weder diese Busleitung beliebig verlängerbar ist, noch die komplette Peripherie in die Absorberkammer gestellt werden kann, muss mit optischen Übertragungsstrecken gearbeitet werden. Mit Hilfe der Übertragungsstrecke kann der Prüfling (DUT) im Inneren der Absorberkammer mit seiner Peripherie, welche sich außerhalb befindet, verbunden werden. Sollen nun die Emissionen eines Steuergerätes gemessen werden, wird für jedes zu prüfende Bus- System eine dieser Übertragungsstrecken benötigt. Dafür muss der Kabelbaum so angepasst werden, dass auf der Seite der Lastnachbildung alle benötigten Transceiver angeschlossen werden können. Dabei ist eine Vielzahl an möglichen Aufbauvarianten denkbar, welche potentiell mit unterschiedlichen Messergebnissen einhergehen, zusätzlich hat bei größeren Aufbauten auch die Positionierung der einzelnen Geräte einen teils unbekannten Einfluss. Durch Vergleichsmessungen sollen daher verschiedene Messaufbauten, in Bezug auf die gestrahlten Emissionen, untersucht werden.
The Role of Sleep in the Realization of Solutions to Problems: Impact of Age
Creators: name: Toor, Balmeet
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: Memory Consolidation
Procedural Memory
Sleep
Aging
fMRI
EEG

description: Unlike other domains of cognition, the acquisition of procedural skills (e.g., the "how to" of memory) is spared by age. However, the consolidation (i.e., the transformation from labile memory to long-term storage) of this type of memory is compromised by age. Optimal memory consolidation for procedural skills is dependent on sleep. Sleep is also negatively impacted by normal, healthy aging. Recent research has identified the neural markers of the lost benefit of sleep for reduced memory consolidation with age. While this is relatively well-established for procedural memory, and for cognitively simple motor skills, the impact of age-related changes in sleep on cognitively complex procedural memory consolidation (i.e., novel cognitive strategies required for "problem-solving skills") remains to be investigated. Furthermore, reduced capacity to solve problems with age has serious mental health-related consequences, including increased depression and suicide attempts, as well as disability in depressed, cognitively impaired older adults. Moreover, problem-solving therapy has been found to improve quality of life in older adults. As such, the aims of these series of studies were to investigate: 1) the behavioural consequences of age on sleep-dependent memory consolidation, 2) identify the electrophysiological markers during sleep of the lost benefit of sleep, 3) identify the age-related changes in brain structure and how this relates to and behavioural outcomes and sleep, and, 4) identify the impact of age on sleep-dependent consolidation of the memory trace for problem-solving skills. Using an innovative combination of EEG, MRI, and behavioural testing in healthy young and older adults, these series of studies revealed novel insights into the breakdown of the normal processes that occur during sleep that support memory. The main objective of this thesis is to identify the neural markers of the very earliest signs under optimal conditions of age-related cognitive decline for problem-solving skills. Investigating the neurophysiological and behavioral consequences of age-related changes in sleep, and their impact on problem-solving skills, will help reveal therapeutic targets for future research that will improve quality of life for seniors. Furthermore, this research will ultimately lead to the development of early interventions targeting sleep that could delay or lessen the severity of the onset of clinically significant cognitive impairment; as those who sleep better, may also age better cognitively.
A note on some bounds between cubic spline interpolants depending on the boundary conditions: Application to a monotonicity property
Creators: name: Baeza, Antonio
name: Yáñez, Dionisio F.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In the context of cubic splines, the authors have contributed to a recent paper dealing with the computation of nonlinear derivatives at the interior nodes so that monotonicity is enforced while keeping the order of approximation of the spline as high as possible. During the review process of that paper, one of the reviewers raised the question of whether a cubic spline interpolating monotone data could be forced to preserve monotonicity by imposing suitable values of the first derivative at the endpoints. Albeit a negative answer appears to be intuitive, we have found no results regarding this fact. In this short work we prove that the answer to that question is actually negative.
Maximally degenerate Weyl tensors in Riemannian and Lorentzian signatures
Creators: name: Doubrov, Boris
name: The, Dennis
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 58J70 (Primary), 53A30, 22E46 (Secondary)

description: We establish the submaximal symmetry dimension for Riemannian and Lorentzian conformal structures. The proof is based on enumerating all subalgebras of orthogonal Lie algebras of sufficiently large dimension and verifying if they stabilize a non-zero Weyl tensor up to scale. Our main technical tools include Dynkin's classification of maximal subalgebras in complex simple Lie algebras, a theorem of Mostow, and Kostant's Bott-Borel-Weil theorem.
description: Minor typos corrected; role of automorphisms clarified
He I Vector Magnetometry of Field Aligned Superpenumbral Fibrils
Creators: name: Schad, T. A.
name: Penn, M. J.
name: Lin, Haosheng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Atomic-level polarization and Zeeman effect diagnostics in the neutral helium triplet at 10830 angstroms in principle allow full vector magnetometry of fine-scaled chromospheric fibrils. We present high-resolution spectropolarimetric observations of superpenumbral fibrils in the He I triplet with sufficient polarimetric sensitivity to infer their full magnetic field geometry. He I observations from the Facility Infrared Spectropolarimeter (FIRS) are paired with high-resolution observations of the Halpha 6563 angstroms and Ca II 8542 angstroms spectral lines from the Interferometric Bidimensional Spectrometer (IBIS) from the Dunn Solar Telescope in New Mexico. Linear and circular polarization signatures in the He I triplet are measured and described, as well as analyzed with the advanced inversion capability of the "Hanle and Zeeman Light" (HAZEL) modeling code. Our analysis provides direct evidence for the often assumed field alignment of fibril structures. The projected angle of the fibrils and the inferred magnetic field geometry align within an error of plus or minus 10 degrees. We describe changes in the inclination angle of these features that reflect their connectivity with the photospheric magnetic field. Evidence for an accelerated flow (approx 40 m/s^2) along an individual fibril anchored at its endpoints in the strong sunspot and weaker plage in part supports the magnetic siphon-flow mechanism's role in the inverse Evershed effect. However, the connectivity of the outer endpoint of many of the fibrils cannot be established.
description: Accepted for publication in APJ, 40 pages, 13 figures, 2 tables
Production of Z' and W' via Drell-Yan processes in the 4D Composite Higgs Model at the LHC
Creators: name: Barducci, D.
name: Belyaev, A.
name: De Curtis, S.
name: Moretti, S.
name: Pruna, G. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an analysis of both the Neutral Current (NC) and Charged Current (CC) Drell-Yan processes at the LHC within a 4 Dimensional realization of a Composite Higgs model studying the cross sections and taking into account the possible impact of the extra fermions present in the spectrum.
description: Conference proceeding, XII IFAE Edition, 3-5 April 2013, Cagliari. 2 pages, 2 figures; v2 typo corrected
Rückwirkung von Positioniersystemen auf die Feldverteilung in einer GTEM-Zelle
Creators: name: Rosenthal, Max
name: Jacobs, Ralf Theo
name: Pasche, Konstantin
name: Suthau, Eike
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: GTEM-Zelle
subject: elektromagnetische Felder
subject: Positionierungssysteme
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Eine GTEM-Zelle (Gigahertz Transverse Electromagnetic Cell) ist eine standardisierte Mess- und Prüfumgebung für elektromagnetische Verträglichkeit (EMV). Sie zeichnet sich durch die Erzeugung homogener elektromagnetischer Felder über ein breites Frequenzspektrum aus [1]. Für die Untersuchung feldgebundener EMV-Probleme ist neben der analytischen und numerischen Betrachtung, die präzise Messung [2] elektromagnetischer Felder von großer Bedeutung. Automatisierte Positioniersysteme für Feldsonden [3, 4] ermöglichen dabei eine Reduzierung der benötigten Messzeit und eine Erhöhung der Reproduzierbarkeit, wobei das verwendete System möglichst keinen Einfluss auf das Feld haben sollte. In dieser Arbeit werden die Rückwirkungen von zwei verschiedenartigen Positioniersystemen auf das zu messende Feld in einer GTEM-Zelle untersucht und aufgezeigt. Dazu werden ein automatisierter Kreuztisch und ein Positioniersystem mit einer hängenden Feldsonde in die Zelle eingesetzt.
Materials Design with Machine Learning
Creators: name: Benlolo, Ian
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: Machine Learning
Materials Design

description: In the quest to advance materials design, this thesis integrates Machine Learning (ML) techniques with Density Functional Theory (DFT) data. A novel representation called splashdown is formulated to capture long-range interactions, an aspect often neglected by material representations. A project known as ORGANIZER leads to the creation of a pivotal database, culminating in the discovery of a new organic solid-state lasing molecule that doubled the state-of-the-art emission gain cross-section. Concurrently, a monte-carlo based optimizer, aMC, is tested, demonstrating superior performance to gradient-based methods without the need for expensive gradient computation. Enhanced Graph Neural Networks (GNN)s predict High Entropy Alloy (HEA) catalysts for oxygen reduction reaction, halving necessary DFT computations and unveiling a new HEA catalyst with a 0.27V overpotential. The splashdown representation compares to state-of-the-art ones like MBTR and SOAP in predicting long-range interactions. Collectively, these efforts highlight the transformative potential of ML and some adjacent fields in materials science.
Adaptive multi-criteria-based load balancing technique for resource allocation in fog-cloud environments
Creators: name: Gad-Elrab, Ahmed A. A.
name: Alsharkawy, Almohammady S.
name: Embabi, Mahmoud E.
name: Sobhi, Ahmed
name: Emara, Farouk A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Recently, to deliver services directly to the network edge, fog computing, an emerging and developing technology, acts as a layer between the cloud and the IoT worlds. The cloud or fog computing nodes could be selected by IoTs applications to meet their resource needs. Due to the scarce resources of fog devices that are available, as well as the need to meet user demands for low latency and quick reaction times, resource allocation in the fog-cloud environment becomes a difficult problem. In this problem, the load balancing between several fog devices is the most important element in achieving resource efficiency and preventing overload on fog devices. In this paper, a new adaptive resource allocation technique for load balancing in a fog-cloud environment is proposed. The proposed technique ranks each fog device using hybrid multi-criteria decision-making approaches Fuzzy Analytic Hierarchy Process (FAHP) and Fuzzy Technique for Order Performance by Similarity to Ideal Solution (FTOPSIS), then selects the most effective fog device based on the resulting ranking set. The simulation results show that the proposed technique outperforms existing techniques in terms of load balancing, response time, resource utilization, and energy consumption. The proposed technique decreases the number of fog nodes by 11%, load balancing variance by 69% and increases resource utilization to 90% which is comparatively higher than the comparable methods.
Herausforderungen bei der Umsetzung von EMV-Prüfungen an Fahrzeugen im Anwendungsfall High Power DC Charging – Prüfung bei 80% Ladeleistung
Creators: name: Maarleveld, Marc
name: Jeschke, Sebastian
name: Bärenfänger, Jörg
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Elektrofahrzeug
subject: Elektromobilität
subject: Performance
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Die Verbreitung sowie Verfügbarkeit von Elektrofahrzeugen nimmt immer weiter zu. Um die Elektromobilität zum Erfolg zu führen sind mehrere Faktoren wichtig. Zum einen müssen die Elektrofahrzeuge hinsichtlich Ihrer Performance (Leistung, Reichweite, etc.) den Nutzer überzeugen. Darüber hinaus ist die Verfügbarkeit einer „komfortablen“ Lade-Infrastruktur unumgänglich. Hier spielt sowohl die Anzahl der installierten Ladesäulen als auch die verfügbare elektrische Ladeleistung und damit die notwendige Dauer eines ausreichenden Ladevorganges eine große Rolle. Zielsetzung ist es, ein Elektrofahrzeug in möglichst kurzer Zeit wieder aufzuladen. Als zu Grunde liegender Lösungsansatz hat sich hieraus das sogenannte High Power DC Charging [1] mit Ladeleistungen von bis zu 350 kW entwickelt. Diese Technologie bietet die Möglichkeit ein Elektrofahrzeug mit vertretbarem Zeitaufwand zu laden. Die beim High Power DC Laden auftretenden hohen Leistungen, respektive hohen Ströme und Spannungen, stellen jedoch für die Umsetzung einer EMV-Prüfung in eben diesem Betriebsmodus eine Herausforderung an Messequipment sowie Peripherie dar. Im folgenden soll der Anwendungsfall näher betrachtet werden, in dem das Elektrofahrzeug den Prüfling für die EMV-Prüfungen im Ladevorgang darstellt. Basierend auf den Vorgaben der in diesem Fall heranzuziehenden Normen [2], [3] ergibt sich folgender Systemaufbau. Dieser Aufbau stellt die Basis aller folgenden Betrachtungen und Überlegungen dar.
Modellierung und Messung von Emissionen an Transceiverpins in Automotive-System-ICs, verursacht durch integrierte DC/DC-Wandler
Creators: name: Schade, Alexander
name: Klotz, Frank
name: Jahn, Stefan
name: Weigel, Robert
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Transceiverpin
subject: DC/DC-Wandler
subject: Substratextraktor
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Die Integration von DC/DC-Wandlern mit Transceivern in Automotive-System-ICs führt zu neuen Herausforderungen im Bezug auf die Einhaltung der Emissionsgrenzwerte an den Transceiverpins. An einem Test-IC werden die Emissionen des DC/DC-Wandlers an verschiedenen Transceiverpins ermittelt. Der Substratübertragungspfad wird mit Hilfe eines neuartigen Substratextraktors modelliert, und zur Beschreibung induktiver Bonddrahtkopplungen wird ein HFSS-Packagemodell verwendet. Der Vergleich zwischen Modellvorhersage und Messung zeigt typ. eine Abweichung von unter _6 dB bis 1 GHz.