cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Differential Neural Activity during Retrieval of Specific and General Autobiographical Memories derived from Musical Cues
Creators: name: Hennessey, Jaclyn
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: In the current studies, musical cues were used to elicit memories from multiple levels of specificity. Musical cues allowed for construction of emotional memories that had low levels of prior retrieval. Owing largely to the use of music, memories from varying levels of specificity were retrieved, allowing for comparison of the characteristics and neural correlates of retrieval. Subjects rated vividness, intensity, and re-experiencing greater for specific compared to general memories (Experiments 1 & 2). Additionally, these memories were associated with increased activation in regions within the autobiographical memory network, such as the hippocampus and sensory regions (Experiment 2). Other regions within the network, such as the medial prefrontal cortex, were activated during all autobiographical conditions. These results suggest that regions in the autobiographical network may be involved in different processes during retrieval, some being engaged during all autobiographical construction conditions and others being preferentially engaged during construction of event-specific memories.
Theory of population coupling and applications to describe high order correlations in large populations of interacting neurons
Creators: name: Huang, Haiping
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: To understand the collective spiking activity in neuronal populations, it is essential to reveal basic circuit variables responsible for these emergent functional states. Here, I develop a mean field theory for the population coupling recently proposed in the studies of visual cortex of mouse and monkey, relating the individual neuron activity to the population activity, and extend the original form to the second order, relating neuron-pair's activity to the population activity, to explain the high order correlations observed in the neural data. I test the computational framework on the salamander retinal data and the cortical spiking data of behaving rats. For the retinal data, the original form of population coupling and its advanced form can explain a significant fraction of two-cell correlations and three-cell correlations, respectively. For the cortical data, the performance becomes much better, and the second order population coupling reveals non-local effects in local cortical circuits.
description: 14 pages, 8 figures, Journal of Statistical Mechanics: Theory and Experiment (in press)
Steigerung der Verfügbarkeit mobiler Arbeitsmaschinen durch Betriebslasterfassung und Fehleridentifikation an hydrostatischen Verdrängereinheiten
Creators: name: Boog, Manuel
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Axialkolbenmaschine
Fehler
Betriebsdaten
Hydraulik
Mobilelektronik

description: Am Beispiel einer hydrostatischen Fahrantriebspumpe werden verschiedene Möglichkeiten zur Verfügbarkeitssteigerung von mobilen Arbeitsmaschinen aufgezeigt. Auftretende Fehler werden durch ein Fehlererkennungs- und Fehleridentifikationsverfahren verarbeitet und erlauben eine angepasste Fehlerreaktion im Maschinenbetrieb. Ein zweiter Ansatz basiert auf der gezielten Erfassung von Betriebslasten zur Restlebensdauerabschätzung und zur belastungsabhängigen Instandhaltung.
On the Conservation of Cross Helicity and Wave Action in Solar-Wind Models with Non-WKB Alfven Wave Reflection
Creators: name: Chandran, Benjamin D. G.
name: Perez, Jean C.
name: Verscharen, Daniel
name: Klein, Kristopher G.
name: Mallet, Alfred
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The interaction between Alfven-wave turbulence and the background solar wind affects the cross helicity in two ways. Non-WKB reflection converts outward-propagating Alfven waves into inward-propagating Alfven waves and vice versa, and the turbulence transfers momentum to the background flow. When both effects are accounted for, the total cross helicity is conserved. In the special case that the background density and flow speed are independent of time, the equations of cross-helicity conservation and total-energy conservation can be combined to recover a well-known equation derived by Heinemann and Olbert that has been interpreted as a non-WKB generalization of wave-action conservation. This latter equation (in contrast to cross-helicity and energy conservation) does not hold when the background varies in time.
description: 9 pages, 1 figure, in press at ApJ
Skalierbare adaptive System-on-Chip-Architekturen für Inter-Car und Intra-Car Kommunikationsgateways
Creators: name: Sander, Oliver
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Automotive
Gateway
Car2X
System-on-Chip
Kommunikation

description: Die Kommunikation zwischen Verkehrsteilnehmern ist ein elementarer Bestandteil zukünftiger Mobilitätskonzepte. Die Arbeit untersucht, welchen Anforderungen die Kommunikationsknotenpunkte gerecht werden müssen. Das Ergebnis ist eine System-on-Chip Architektur für die fahrzeuginterne und fahrzeugübergreifende Kommunikation. Wesentliche Eigenschaftensind Flexibilität und Skalierbarkeit, die es erlauben, mittels neuartiger Methoden und Tools optimierte Architekturen zu realisieren.
The Earth transiting the Sun as seen from Jupiter's moons: detection of an inverse Rossiter-McLaughlin effect produced by the Opposition Surge of the icy Europa
Creators: name: Molaro, Paolo
name: Barbieri, Mauro
name: Monaco, Lorenzo
name: Zaggia, Simone
name: Lovis, Christophe
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report on a multi-wavelength observational campaign which followed the Earth's transit on the Sun as seen from Jupiter on 5 Jan the 2014. Simultaneous observations of Jupiter's moons Europa and Ganymede obtained with HARPS from La Silla, Chile, and HARPS-N from La Palma, Canary Islands, were performed to measure the Rossiter-McLaughlin effect due to the Earth's passage using the same technique successfully adopted for the 2012 Venus Transit (Molaro et al 2013). The expected modulation in radial velocities was of about 20 cm/s but an anomalous drift as large as 38 m/s, i.e. more than two orders of magnitude higher and opposite in sign, was detected instead. The consistent behaviour of the two spectrographs rules out instrumental origin of the radial velocity drift and BiSON observations rule out the possible dependence on the Sun's magnetic activity. We suggest that this anomaly is produced by the Opposition Surge on Europa's icy surface, which amplifies the intensity of the solar radiation from a portion of the solar surface centered around the crossing Earth which can then be observed as a a sort of inverse Rossiter-McLaughling effect. in fact, a simplified model of this effect can explain in detail most features of the observed radial velocity anomalies, namely the extensions before and after the transit, the small differences between the two observatories and the presence of a secondary peak closer to Earth passage. This phenomenon, observed here for the first time, should be observed every time similar Earth alignments occur with rocky bodies without atmospheres. We predict it should be observed again during the next conjunction of Earth and Jupiter in 2026.
description: 9 pages, 7 figures
Thermische Charakterisierung von keramischen Schwammstrukturen für verfahrenstechnische Apparate
Creators: name: Dietrich, Benjamin
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Keramischer Schwamm
Offenzelliger Schaum
Wärmeleitfähigkeit
Druckverlust
Wärmeübergangskoeffizient

description: In dieser Arbeit wurden Schwämme aus Al2O3, Mullit und oxidisch gebundenem SiC hinsichtlich ihrer Impuls- und Wärmetransporteigenschaften experimentell untersucht. Zur Auslegung chemischer Apparate nach dem heterogenen oder dem homogenen Modell wurden für folgende wärmetechnisch interessanten Parameter allgemeingültige, dimensionslose Korrelationen abgeleitet: Druckverlust, Wärmeübergangskoeffizient zwischen Fluid und Feststoffgerüst, Ruhe- sowie axiale und radiale Zweiphasen-Wärmeleitfähigkeit.
Implication of the non-detection of neutrinos above 2PeV
Creators: name: Yacobi, Lee
name: Guetta, Dafne
name: Behar, Ehud
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The IceCube telescope has detected diffuse neutrino emission, 20 events of which were reported to be above 60~TeV. In this paper, we fit the diffuse neutrino spectrum using Poisson statistics, which are the most appropriate for the low counts per energy bin. We extend the fitted energy range and exploit the fact that no neutrinos were detected above 2~PeV, despite the high detector sensitivity around the Glashow resonance at 6.3\,PeV and beyond. A best-fit power-law slope of $α=2.9\pm 0.3$ is found with no evidence for a high-energy cutoff. This slope is steeper than $α=2.3\pm 0.3$ found by the IceCube team using a different fitting method. Such a steep spectrum facilitates the identification of high energy ($\gg$ PeV) neutrinos, if detected, to be due to the GZK effect of cosmic-ray protons interacting with the Extragalactic Background Light. We use the ratio of EeV to PeV neutrinos in GZK models to show that the currently detected PeV neutrinos could not be due to the GZK effect, because this would imply many more higher-energy neutrinos that should have been detected, but were not. The non-detection of GZK neutrinos by IceCube despite more than essentially 1200 observing days, has already ruled out (at 95\% confidence) models that predict rates of $\sim1$ neutrino/yr or more. We use this non-detection to quantify the confidence at which GZK models are ruled out, and compute the additional IceCube and (in the future) ARA observing time that would rule them out with 95\% confidence if no detection is made.
description: 6 pages, 4 figures. Submitted to Astrophysical Journal
title: Manuel de Oliveira Granjo
Creators: name: Cabeleira, João
Publisher: name: CHAM, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2022

description: Entrada histórica sobre Manuel de Oliveira Granjo na plataforma eViterbo
description: Cabeleira, João. 2022. Manuel de Oliveira Granjo in eViterbo. CHAM, Faculdade de Ciências Sociais e Humanas, Universidade Nova de Lisboa. eISBN: 978-989-8492-77-7
The Feasibility of an 8-week, Home-based Isometric Strength Training Program for Improving Dressage Test Performance in Equestrian Athletes
Creators: name: Lee, Jordan
Publisher: name: University of North Carolina at Chapel Hill Graduate School
Year: 2015
Subjects: Medical sciences

description: PURPOSE: To determine the feasibility of an 8-week, home-based isometric strength-training program in equestrians. Secondary purposes examined changes in muscular strength, endurance, and riding performance. METHODS: 18 riders (≥1yr dressage experience, riding ≥1hr/week, otherwise untrained) completed pre/post muscular tests and a US Equestrian Federation (USEF) Training Level Rider Test. A progressive, 3 day/wk riding-specific intervention using Therabands was implemented. Feasibility was determined as >50% of riders completing ≥18/24 sessions of ≥2 sets/exercise of prescribed volume. Dependent samples t-tests compared pre/post composite muscular strength/endurance, and riding test scores. RESULTS: 55.5% of riders completed ≥75% exercise sessions. Significant improvements were observed for muscular endurance ((pre 149.8±82.2, post 209.2±112.2), p=.003), and for riding test scores ((pre 57.8±7.4, post 60.8±5.1), p=.037). Exploratory analyses revealed a significant correlation between improvements in muscular endurance and riding test score (r2=.285, p=.02). CONCLUSION: The intervention was feasible and produced improvements in muscular strength, endurance, and riding test performance.
Gezielte Variation und Analyse des Fahrverhaltens von Kraftfahrzeugen mittels elektrischer Linearaktuatoren im Fahrwerksbereich
Creators: name: Kraft, Christian
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Fahrdynamik
Fahrwerk
Linearaktuatoren
Objektivierung
Korrelation

description: Die Arbeit beschreibt die Konzeption, die Entwicklung und den Einsatz verschiedener Werkzeuge zur gezielten Variation und Analyse des Fahrverhaltens von Kraftfahrzeugen. Eine zentrale Rolle spielen hierbei elektrische Linearaktuatoren, welche durch die virtuelle Veränderung der Spezifikationen von Fahrwerksbauteilen mittels der Generierung zusätzlicher Relativkräfte zwischen Rad und Karosserie das Bewegungsverhalten der Fahrzeugkarosserie gezielt verändern können.
Hand Hygiene Practices and the Risk of Human Coronavirus Infections in a UK Community Cohort
Creators: name: Hayward, Andrew
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Public Health
subject: Medicine and Health Sciences

description: This is data from the Flu Watch Cohort Study used to examine the effect of hand hygiene on seasonal Coronavirus infection. The methods and results are described in Wellcome Open article Hand Hygiene Practices and the Risk of Human Coronavirus Infections in a UK Community Cohort
Towards Self-Sufficient High-Rises
Creators: name: Ekici, Berk
Publisher: name: A+BE | Architecture and the Built Environment
Year: 2022

description: Population growth and urbanisation trends bring many consequences related to the increase in global energy consumption, CO2 emissions and a decrease in arable land per person. High‑rises have been one of the inevitable buildings of metropoles to provide extra floor space since the early examples in the 19th century. Therefore, optimisation of high-rise buildings has been the focus of researchers because of significant performance enhancement, mainly in energy consumption and generation. Based on the facts of the 21st century, optimising high-rise buildings for multiple vital resources (such as energy, food, and water) is necessary for a sustainable future. This research suggests “self-sufficient high-rise buildings” that can generate and efficiently consume vital resources in addition to dense habitation for sustainable living in metropoles. The complexity of self-sufficient high-rise building optimisation is more challenging than optimising regular high-rises that have not been addressed in the literature. The main challenge behind the research is the integration of multiple performance aspects of self-sufficiency related to the vital resources of human beings (energy, food, and water) and consideration of large numbers of design parameters related to these multiple performance aspects. Therefore, the dissertation presents a framework for performance optimisation of self-sufficient high-rise buildings using artificial intelligence focusing on the conceptual phase of the design process. The output of this dissertation supports decision-makers to suggest well-performing high-rise buildings involving the aspects of self-sufficiency in a reasonable timeframe.
description: A+BE | Architecture and the Built Environment, No. 10 (2022): Towards Self-Sufficient High-Rises
Efficient isolation of multiphoton processes and detection of collective states in dilute samples
Creators: name: Bruder, Lukas
name: Binz, Marcel
name: Stienkemeier, Frank
Publisher: name: arXiv
Year: 2015
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A novel technique to sensitively and selectively isolate multiple-quantum coherences in a femtosecond pump-probe setup is presented. Detecting incoherent observables and imparting lock-in amplification, even weak signals of highly dilute samples can be acquired. Applying this method, efficient isolation of one- and two-photon transitions in a rubidium-doped helium droplet beam experiment is demonstrated and collective resonances up to fourth order are observed in a potassium vapor for the first time. Our approach provides new perspectives for coherent experiments in the deep UV and novel multidimensional spectroscopy schemes, in particular when selective detection of particles in dilute gas-phase targets is possible.
A view of Large Magellanic Cloud HII regions N159, N132, and N166 through the 345 GHz window
Creators: name: Paron, S.
name: Ortega, M. E.
name: Fariña, C.
name: Cunningham, M.
name: Jones, P. A.
name: Rubio, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present results obtained towards the HII regions N159, N166, and N132 from the emission of several molecular lines in the 345 GHz window. Using ASTE we mapped a 2.4' $\times$ 2.4' region towards the molecular cloud N159-W in the $^{13}$CO J=3-2 line and observed several molecular lines at an IR peak very close to a massive young stellar object. $^{12}$CO and $^{13}$CO J=3-2 were observed towards two positions in N166 and one position in N132. The $^{13}$CO J=3-2 map of the N159-W cloud shows that the molecular peak is shifted southwest compared to the peak of the IR emission. Towards the IR peak we detected emission from HCN, HNC, HCO$^{+}$, C$_{2}$H J=4-3, CS J=7-6, and tentatively C$^{18}$O J=3-2. This is the first reported detection of these molecular lines in N159-W. The analysis of the C$_{2}$H line yields more evidence supporting that the chemistry involving this molecular species in compact and/or UCHII regions in the LMC should be similar to that in Galactic ones. A non-LTE study of the CO emission suggests the presence of both cool and warm gas in the analysed region. The same analysis for the CS, HCO$^{+}$, HCN, and HNC shows that it is very likely that their emissions arise mainly from warm gas with a density between $5 \times 10^5$ to some $10^6$ cm$^{-3}$. The obtained HCN/HNC abundance ratio greater than 1 is compatible with warm gas and with an star-forming scenario. From the analysis of the molecular lines observed towards N132 and N166 we propose that both regions should have similar physical conditions, with densities of about 10$^3$ cm$^{-3}$.
description: accepted in MNRAS (October 5, 2015)
Magnetic Resonance Imaging on Patients with Implanted Cardiac Pacemakers
Creators: name: Seitz, Sebastian
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: MRI
pacemaker
numerical field calculation
biomedical engineering

description: The aim of this work was to identify the patterns that can induce heating around implanted cardiac pacemakers during MRI and to develop strategies to counteract them. Two approaches were taken: computer simulations of the occurring electromagnetic field distributions and in-vitro experiments using phantoms in real MRI devices, both for conventional bore-hole and new open MRI systems. Using the open MRI, the observed heating could be reduced significantly.
Thermal BEC black holes
Creators: name: Casadio, Roberto
name: Giugno, Andrea
name: Micu, Octavian
name: Orlandi, Alessio
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We review some features of BEC models of black holes obtained by means of the HWF formalism. We consider the KG equation for a toy graviton field coupled to a static matter current in spherical symmetry. The classical field reproduces the Newtonian potential generated by the matter source, while the corresponding quantum state is given by a coherent superposition of scalar modes with continuous occupation number. An attractive self-interaction is needed for bound states to form, so that (approximately) one mode is allowed, and the system of N bosons can be self-confined in a volume of the size of the Schwarzschild radius. The HWF is then used to show that the radius of such a system corresponds to a proper horizon. The uncertainty in the size of the horizon is related to the typical energy of Hawking modes: it decreases with the increasing of the black hole mass (larger number of gravitons), in agreement with semiclassical calculations and different from a single very massive particle. The spectrum contains a discrete ground state of energy $m$ (the bosons forming the black hole), and a continuous spectrum with energy $ω> m$ (representing the Hawking radiation and modelled with a Planckian distribution at the expected Hawking temperature). The $N$-particle state can be collectively described by a single-particle wave-function given by a superposition of a total ground state with energy $M = N m$ and a Planckian distribution for $E > M$ at the same Hawking temperature. The partition function is then found to yield the usual area law for the entropy, with a logarithmic correction related with the Hawking component. The backreaction of modes with $ω> m$ is also shown to reduce the Hawking flux and the evaporation properly stops for vanishing mass.
description: 30 pages, pdflatex with 6 figures. Review paper prepared for Entropy special issue "Entropy in Quantum Gravity and Quantum Cosmology"
Moral Contagion: Reputation vs. Contamination
Creators: name: Iqmal, Muhammad
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: contamination fear
subject: disgust
subject: magical thinking
subject: moral
subject: moral contagion
subject: reputation concern

description: Immoral stimuli are judged to be physically contaminating, exemplified by multiple studies of people unwilling to interact with stimuli such as a Nazi armband or a murderer’s sweater. There are two accounts explaining this contagiousness, magical thinking – a human intuition whereby moral ‘essences’ are transferred via physical contact, and reputation concern – an evolutionary account where visible association with immoral stimuli may damage one’s reputation. This study aims to pit these explanations against each other by comparing the perceived discomfort of individuals while they imagine wearing a sweater associated with either pathogen or immoral sources.
Dynamically Babinet-invertible metasurface: a capacitive-inductive reconfigurable filter for terahertz waves using vanadium-dioxide metal-insulator transition
Creators: name: Urade, Yoshiro
name: Nakata, Yosuke
name: Okimura, Kunio
name: Nakanishi, Toshihiro
name: Miyamaru, Fumiaki
name: Takeda, Mitsuo W.
name: Kitano, Masao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This paper proposes a reconfigurable planar metamaterial that can be switched between capacitive and inductive responses using local changes in the electrical conductivity of its constituent material. The proposed device is based on Babinet's principle and exploits the singular electromagnetic responses of metallic checkerboard structures, which are dependent on the local electrical conductivity. Utilizing the heating-induced metal-insulator transition of vanadium dioxide ($\mathrm{VO}_2$), the proposed metamaterial is designed to compensate for the effect of the substrate and is experimentally characterized in the terahertz regime. This reconfigurable metamaterial can be utilized as a switchable filter and as a switchable phase shifter for terahertz waves.
description: 7 pages, 3 figures
Urban Scenes of a Port City
Creators: name: Tanış, Fatma
Publisher: name: A+BE | Architecture and the Built Environment
Year: 2022

description: This dissertation is an invitation to the reader to explore Güzel İzmir / Beautiful İzmir in Turkey. Through three different semi-fictional narratives, it aims to draw attention to specific and singular spaces as they were recorded and remembered through old postcards, black and white photographs, stories, and written travelogues in the past centuries and decades. Thus, it wants to discuss the specificity of an eastern Mediterranean port city by addressing it on eye-level through the experiences of a wanderer. By acknowledging the important role of narratives in building an image of the city, this doctoral research proposes that developing a particular narrative writing method may help to re-establish emotional connections between present-day inhabitants of port cities and their environments. It offers an alternative way of writing and an unconventional reading of the urban and architectural history of İzmir to revive socio-spatial practices by writing narratives of Beautiful İzmir.
description: A+BE | Architecture and the Built Environment, No. 08 (2022): Urban Scenes of a Port City
Study of a bias in the offline evaluation of a recommendation algorithm
Creators: name: De Myttenaere, Arnaud
name: Golden, Boris
name: Grand, Bénédicte Le
name: Rossi, Fabrice
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Recommendation systems have been integrated into the majority of large online systems to filter and rank information according to user profiles. It thus influences the way users interact with the system and, as a consequence, bias the evaluation of the performance of a recommendation algorithm computed using historical data (via offline evaluation). This paper describes this bias and discuss the relevance of a weighted offline evaluation to reduce this bias for different classes of recommendation algorithms.
description: arXiv admin note: substantial text overlap with arXiv:1407.0822
Untersuchung des Kommunikationsintervalls bei der gekoppelten Simulation
Creators: name: Völker, Lars
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Simulation
Gekoppelte Simulation unter Matlab/Simulink
Simulation mechatronischer Systeme
Virtueller Prototyp
Simulation mobiler Arbeitsmaschinen

description: Die gekoppelte Simulation ist eine Möglichkeit, mechatronische Systeme in der Simulation abzubilden. In der vorliegenden Arbeit wird die gekoppelte Simulation unter Matlab/Simulink beschrieben und eine Möglichkeit aufgezeigt, das Kommunikationsintervall bei der gekoppelten Simulation unter Berücksichtigung der beteiligten Teilsysteme zu bestimmen. Die erarbeitete Handlungsvorschrift wird an Beispielen aus dem Bereich der mobilen Arbeitsmaschinen verifiziert.
AlGaN/GaN-HEMT power amplifiers with optimized power-added efficiency for X-band applications
Creators: name: Kühn, Jutta
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: AlGaN/GaN HEMT
power amplifier
MMIC design
X-band
power-added efficiency

description: This work has arisen out of the strong demand for a superior power-added efficiency (PAE) of AlGaN/GaN high electron mobility transistor (HEMT) high-power amplifiers (HPAs) that are part of any advanced wireless multifunctional RF-system with limited prime energy. Different concepts and approaches on device and design level for PAE improvements are analyzed, e.g. structural and layout changes of the GaN transistor and advanced circuit design techniques for PAE improvements of GaN HEMT HPAs.
Advancing Transparency
Creators: name: Rammig, Lisa
Publisher: name: A+BE | Architecture and the Built Environment
Year: 2022

description: Glass is transparent and that differentiates it from most other building materials. As a result it has played a significant role in the development of architecture, given that its use is not only driven by its functionality as a protective layer, but by its ability to transmit light and hence define spaces. The use of glass has typically brought designers, engineers and builders to the limits of their abilities, whether this was driven by the processing and handling of the material, or the limitationin the understanding of its design capacity. The transparency of the material is of incredible value but it also poses challenges when working with glass; The way it is connected is always visible. As a result, the connections and connectivity of glass are one of the most important considerations when designing with it, both technically and architecturally and in particular for structural applications. In the past century, glass has increasingly been used as a structural component. However its inherent brittleness typically still requires opaque metal connections to transfer load. These connections define contemporary glass architecture – firstly, because they are immediately apparent in a transparent structure and, secondly, as they are part of the engineering design language. However, designers and architects are still aiming to increase the transparency of glass enclosures and structures, leading to a demand to further reduce the visibility of structural connections within the glass. This research aims to address the connectivity of glass through experimental testing of heat bonded glass-glass connections that form a fully transparent atomic bond. Applications for transparent connections are addressed through case studies that explore various novel transparent bonding techniques.
description: A+BE | Architecture and the Built Environment, No. 09 (2022): Advancing Transparency
Ultrakurzzeitdynamik ausgewählter Germaniumcluster, mehrkerniger Seltenerdverbindungen sowie quasi monodisperser (9,7)-Kohlenstoffnanoröhren in Lösung
Creators: name: Klinger, Melanie
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Femtosekundenspektroskopie
Utrakurzzeitdynamik
Nanoröhren
Seltenerdkomplexverbindungen
Germaniumcluster

description: In dieser Arbeit wurden mittels zeitaufgelöster Anregungs-Abfrage-Spektroskopie Untersuchungen zum Relaxationsverhalten eines neunkernigen Germaniumclusters, vierkerniger Lanthanoidkomplexe sowie einwandiger (9,7)-Kohlenstoffnanoröhren in Lösung durchgeführt.
Untersuchung des Einflusses von Mikrotexturierungen auf den einsinnigen, ölgeschmierten Gleitkontakt von Stahl/Saphir-Paarungen
Creators: name: Wahl, Reiner
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Tribologie
Mischreibung
Gleitkontakt
Wirkflächentexturierung
Schmierung
Schmierfilmdicke
Stahl/Saphir-Paarung

description: Zur gezielten Beeinflussung des Reibungsverhaltens können Wirkflächentexturierungen ein effizientes Hilfsmittel darstellen und waren daher Kern dieser Untersuchungen. Die Wirkung der kanalartigen Mikrotexturen auf tribologische Kenngrößen wie Schmierfilmdicke und Reibungszahl wurde durch Modellbildung auf relevante Texturkenngrößen zurückgeführt. Das Modell liefert einen Ansatzpunkt zur systemspezifischen Auslegung von Texturierungen als Konstruktionsdetail in ölgeschmierten Friktionssystemen.
The influence of rhythm on short-term memory for serial order (data)
Creators: name: Gorin, Simon
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: This repository contains the raw data, the data processing scripts, and the statistical analyses output files from the pre-registered study entitled "The influence of rhythm on short-term memory for serial order" (see https://osf.io/s3tvh, for the pre-registered protocol and material). The repository also contains the manuscript accepted for publication indicating changes made relative to the content that received an in-principle acceptance.
Entwicklungsumgebung für Roboterschwärme
Creators: name: Szymanski, Marc
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Robotik
Schwarmintelligenz
Steuerung
Eingebettete Systeme
Telemetrie

description: In der vorliegenden Arbeit werden der systematische Entwurf und die Entwicklung einer Entwicklungsumgebung für Roboterschwärme beschrieben, die auf die spezifischen Eigenarten solcher Multi-Roboter-Systeme (MRS) eingeht. Kernstück der Entwicklungsumgebung sind eine interpretierte Steuersprache sowie eine dynamische interaktive Arena für Experimente. Die Entwicklungsumgebung vereinfacht den Entwurf von MRS, was in mehreren Experimenten mit verschiedenen Robotern anschaulich dargelegt wird.
Nanoplasmonics simulations at the basis set limit through completeness-optimized, local numerical basis sets
Creators: name: Rossi, Tuomas P.
name: Lehtola, Susi
name: Sakko, Arto
name: Puska, Martti J.
name: Nieminen, Risto M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present an approach for generating local numerical basis sets of improving accuracy for first-principles nanoplasmonics simulations within time-dependent density functional theory. The method is demonstrated for copper, silver, and gold nanoparticles that are of experimental interest but computationally demanding due to the semi-core d-electrons that affect their plasmonic response. The basis sets are constructed by augmenting numerical atomic orbital basis sets by truncated Gaussian-type orbitals generated by the completeness-optimization scheme, which is applied to the photoabsorption spectra of homoatomic metal atom dimers. We obtain basis sets of improving accuracy up to the complete basis set limit and demonstrate that the performance of the basis sets transfers to simulations of larger nanoparticles and nanoalloys as well as to calculations with various exchange-correlation functionals. This work promotes the use of the local basis set approach of controllable accuracy in first-principles nanoplasmonics simulations and beyond.
description: 11 pages, 6 figures
Co-Clustering Network-Constrained Trajectory Data
Creators: name: Mahrsi, Mohamed Khalil El
name: Guigourès, Romain
name: Rossi, Fabrice
name: Boullé, Marc
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (stat.ML)
subject: Databases (cs.DB)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recently, clustering moving object trajectories kept gaining interest from both the data mining and machine learning communities. This problem, however, was studied mainly and extensively in the setting where moving objects can move freely on the euclidean space. In this paper, we study the problem of clustering trajectories of vehicles whose movement is restricted by the underlying road network. We model relations between these trajectories and road segments as a bipartite graph and we try to cluster its vertices. We demonstrate our approaches on synthetic data and show how it could be useful in inferring knowledge about the flow dynamics and the behavior of the drivers using the road network.
Structural aspects of phenylglycines, their biosynthesis and occurrence in peptide natural products
Creators: name: Al Toma, Rashed S.
name: Brieke, Clara
name: Cryle, Max J.
name: Süßmuth, Roderich D.
Publisher: name: Technische Universität Berlin
Year: 2015
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften

description: Phenylglycine-type amino acids occur in a wide variety of peptide natural products, including glycopeptide antibiotics and biologically active linear and cyclic peptides. Sequencing of biosynthesis gene clusters of chloroeremomycin, balhimycin and pristinamycin paved the way for intensive investigations on the biosynthesis of 4-hydroxyphenylglycine (Hpg), 3,5-dihydroxyphenylglycine (Dpg) and phenylglycine (Phg) in recent years. The significance and importance of this type of unusual non-proteinogenic aromatic amino acids also for medicinal chemistry has drawn the attention of many research groups and pharmaceutical companies. Herein structures and properties of phenylglycine containing natural products as well as the biosynthetic origin and incorporation of phenylglycines are discussed.
Colored HOMFLY and Generalized Mandelbrot set
Creators: name: Kononov, Ya.
name: Morozov, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Mandelbrot set is a closure of the set of zeroes of $resultant_x(F_n,F_m)$ for iterated maps $F_n(x)=f^{\circ n}(x)-x$ in the moduli space of maps $f(x)$. The wonderful fact is that for a given $n$ all zeroes are not chaotically scattered around the moduli space, but lie on smooth curves, with just a few cusps, located at zeroes of $discriminant_x(F_n)$. We call this phenomenon the Mandelbrot property. If approached by the cabling method, symmetrically-colored HOMFLY polynomials $H^{\cal K}_n(A|q)$ can be considered as linear forms on the $n$-th "power" of the knot ${\cal K}$, and one can wonder if zeroes of $resultant_{q^2}(H_n,H_m)$ can also possess the Mandelbrot property. We present and discuss such resultant-zeroes patterns in the complex-$A$ plane. Though $A$ is hardly an adequate parameter to describe the moduli space of knots, the Mandelbrot-like structure is clearly seen -- in full accord with the vision of arXiv:hep-th/0501235, that concrete slicing of the Universal Mandelbrot set is not essential for revealing its structure.
description: 16 pages
Wigner crystal phases in bilayer graphene
Creators: name: Silvestrov, P. G.
name: Recher, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is generally believed that a Wigner Crystal in single layer graphene can not form because the magnitudes of the Coulomb interaction and the kinetic energy scale similarly with decreasing electron density. However, this scaling argument does not hold for the low energy states in bilayer graphene. We consider the formation of a Wigner Crystal in weakly doped bilayer graphene with an energy gap opened by a perpendicular electric field. We argue that in this system the formation of the Wigner Crystal is not only possible, but different phases of the crystal with very peculiar properties may exist here depending on the system parameters.
description: 8 pages including appendix, 2 figures, accepted to Phys. Rev. B
Evaluating conservation assessments in the Sandhills of North Carolina
Creators: name: Simon, Matthew Copeland
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: Conservation assessments are spatially explicit techniques that assign value to areas based on their ability to protect natural resources such as species, habitat and environmental processes. These may be spatially congruent thereby providing value-added conservation opportunities, or incongruent, representing trade-offs that should be considered with full knowledge in the conservation planning process. However, little attention has been given to the congruency of multiple conservation assessment criteria, or to how a multi-criteria framework might be used to improve the conservation planning process. My thesis presents a comparison of commonly employed conservation assessment techniques in the Sandhills surrounding Fort Bragg, North Carolina; biodiversity hotspots, habitat connectivity for the red-cockaded woodpecker (Picoides borealis), and ecosystem services (carbon storage). My research shows that priority areas can be identified even when overall congruence among assessment criteria is low. I also discuss the difficulty of comparing assessments and present a novel approach to comparing conservation assessments criteria.
The impact of steam on the electronic structure of the selective propane oxidation catalyst MoVTeNb oxide (orthorhombic M1 phase)
Creators: name: Heine, Christian
name: Hävecker, Michael
name: Trunschke, Annette
name: Schlögl, Robert
name: Eichelbaum, Maik
Publisher: name: Technische Universität Berlin
Year: 2015
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften

description: The selective propane oxidation catalyst MoVTeNb oxide M1 was investigated by microwave conductivity, synchrotron X-ray photoelectron, soft X-ray absorption and resonant photoelectron spectroscopy under reaction conditions to identify the influence of steam on the electronic bulk and surface properties. Steam significantly increases both the conversion of propane and the selectivity to the target product acrylic acid. The increased catalytic performance comes along with a decreased conductivity, a modification of the surface chemical and electronic structure with an enrichment of covalently bonded V5+ species to the extent of Mo6+, a decreased work function and hence polarity of the surface and a modified valence band structure. The higher degree of covalency in metal oxide bonds affects the mobility of the free charge carriers, and hence explains the decrease of the conductivity with steam. Furthermore we could prove that a subsurface space charge region depleted in electrons and thus an upward bending of the electronic band structure are induced by the reaction mixture, which is however not dependent on the steam content.
Design and performance of an ionisation chamber for the measurement of low alpha-activities
Creators: name: Hartmann, Andreas
name: Hutsch, Jochen
name: Krüger, Felix
name: Sobiella, Manfred
name: Wilsenach, Heinrich
name: Zuber, Kai
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A new ionisation chamber for alpha-spectroscopy has been built from radio-pure materials for the purpose of investigating long lived alpha-decays. The measurement makes use of pulse shape analysis to discriminate between signal and background events. The design and performance of the chamber is described in this paper. A background rate of ($10.9 \pm 0.6$) counts per day in the energy region of 1 MeV to 9 MeV was achieved with a run period of 30.8 days. The background is dominantly produced by radon daughters.
description: 10 pages, 9 figures
Global Strong Well-posedness of the Three Dimensional Primitive equations in $L^p$-spaces
Creators: name: Hieber, Matthias
name: Kashiwabara, Takahito
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this article, an $L^p$-approach to the primitive equations is developed. In particular, it is shown that the three dimensional primitive equations admit a unique, global strong solution for all initial data $a \in [X_p,D(A_p)]_{1/p}$ provided $p \in [6/5,\infty)$. To this end, the hydrostatic Stokes operator $A_p$ defined on $X_p$, the subspace of $L^p$ associated with the hydrostatic Helmholtz projection, is introduced and investigated. Choosing $p$ large, one obtains global well-posedness of the primitive equations for strong solutions for initial data $a$ having less differentiability properties than $H^1$, hereby generalizing in particular a result by Cao and Titi (Ann. Math. 166 (2007), pp. 245-267) to the case of non-smooth initial data.
description: 26 pages
A New Sample of Obscured AGNs Selected from the XMM-Newton and AKARI Surveys
Creators: name: Terashima, Yuichi
name: Hirata, Yoshitaka
name: Awaki, Hisamitsu
name: Oyabu, Shinki
name: Gandhi, Poshak
name: Toba, Yoshiki
name: Matsuhara, Hideo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a new sample of obscured active galactic nuclei (AGNs) selected from the XMM serendipitous source and AKARI point-source catalogs. We match X-ray sources with infrared (18 and 90 micron) sources located at |b|>10 deg to create a sample consisting of 173 objects. Their optical classifications and absorption column densities measured by X-ray spectra are compiled and study efficient selection criteria to find obscured AGNs. We apply the criteria (1) X-ray hardness ratio defined by using the 2-4.5 keV and 4.5-12 keV bands >-0.1 and (2) EPIC-PN count rate (CR) in the 0.2-12 keV to infrared flux ratio CR/F90<0.1 or CR/F18<1, where F18 and F90 are infrared fluxes at 18 and 90 micron in Jy, respectively, to search for obscured AGNs. X-ray spectra of 48 candidates, for which no X-ray results have been published, are analyzed and X-ray evidence for the presence of obscured AGNs such as a convex shape X-ray spectrum indicative of absorption of NH~10^{22-24} cm^-2, a very flat continuum, or a strong Fe-K emission line with an equivalent width of >700 eV is found in 26 objects. Six among them are classified as Compton-thick AGNs, and four are represented by either Compton-thin or Compton-thick spectral models. The success rate of finding obscured AGNs combining our analysis and the literature is 92% if the 18 micron condition is used. Of the 26 objects, 4 are optically classified as an HII nucleus and are new "elusive AGNs" in which star formation activity likely overwhelms AGN emission in the optical and infrared bands.
description: 36 pages, To appear in the Astrophysical Journal
Recurrent orbits of subgroups of local complex analytic diffeomorphisms
Creators: name: Ribón, Javier
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: Primary: 37F75, 20F16, Secondary: 20F14, 32H50

description: We show recurrent phenomena for orbits of groups of local complex analytic diffeomorphisms that have a certain subgroup or image by a morphism of groups that is non-virtually solvable. In particular we prove that a non-virtually solvable subgroup of local biholomorphisms has always recurrent orbits, i.e. there exists an orbit contained in its set of limit points.
description: 38
title: Manuel Martins (4)
Creators: name: Pinto, Sandra M. G.
Publisher: name: CHAM, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2022

description: Entrada biográfica sobre Manuel Martins, na plataforma eViterbo
description: Pinto, Sandra MG. 20022. Manuel Martins (4). In eViterbo. CHAM, Faculdade de Ciências Sociais e Humanas, Universidade Nova de Lisboa. eISBN: 978-989-8492-77-7
Deductive verification of object-oriented software : dynamic frames, dynamic logic and predicate abstraction
Creators: name: Weiß, Benjamin
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: software specification
software verification
design by contract
theorem proving
abstract interpretation

description: Software systems play a central role in modern society, and their correctness is often crucially important. Formal specification and verification are promising approaches for ensuring correctness more rigorously than just by testing. This work presents an approach for deductively verifying design-by-contract specifications of object-oriented programs. The approach is based on dynamic logic, and addresses the challenges of modularity and automation using dynamic frames and predicate abstraction.
Konzeption und Realisierung eines neuen Systems zur produktbegleitenden virtuellen Inbetriebnahme komplexer Förderanlagen
Creators: name: Kövari, Lars
Publisher: name: KIT Scientific Publishing
Year: 2011
Subjects: Virtuelle Inbetriebnahme
Simulation
Fahrerloses Transportsystem
Elektrohängebahn
Förderanlage

description: Die virtuelle Inbetriebnahme ermöglicht die Vorwegnahme der steuerungstechnischen Inbetriebnahme von komplexen Förderanlagen an einem virtuellen Modell. In dieser Arbeit wird die Konzeption eines neuen Systems zur produktbegleitenden virtuellen Inbetriebnahme geschildert und dessen Umsetzung in Form eines neuen prototypischen Simulationssystems beschrieben. Durch die Umsetzung des entwickelten Konzeptes wurde eine durchgängige virtuelle Inbetriebnahme der betrachteten Förderanlagen erreicht.