cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Influence of dead-water zones on the dispersive mass-transport in rivers
Creators: name: Weitbrecht, Volker
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Groin fields
dispersion
pollutant transport
Lagrangian particle tracking

description: The dispersive mass transport in rivers has been investigated to improve the predictability of transport scenarios in case of accidental pollutant spills. In particular, the influence of dead-water zones, as they are given by groin fields, on the transport characteristics in the main stream has been analyzed. A literature review of detailed map material from the rivers Rhine, Waal and Elbe has been performed, in order to plan representative laboratory experiments. Typical aspect ratios of the groin fields as well as typical inclination angles have been summarized. Based on these results, experiments have been performed in a laboratory flume equipped with schematized groins. Within theses experiments the aspect ratio, the inclination angles as well as the groin field volume has been varied. Due to the fact that the flow is very shallow and, therefore, quasi two-dimensional, the flow velocities have been determined at the water surface, using a Surface Particle-Image-Velocimetry-System that has been developed for that purpose. Additional measurements, using a two-dimensional Laser-Doppler-Velocimeter, have been performed for resolving the velocity distribution over the water depth. With the help of these measurements it was possible to determine the typical recirculating flows in the groin fields as well as the coherent, horizontal eddies in the mixing layer between dead-water zone and main stream, that are governing the mass exchange. The high spatial and temporal resolution of the surface PIV measurements made it possible to estimate also the mass exchange between groin field and main stream. With the help of Planar-Concentration-Analysis, which is a method for determining depth-averaged planar concentration fields, it could be shown that the mass exchange between groin field and main stream increases with increasing length of the groin field. For these measurements a tracer injection device has been developed, that consists of a movable multi-port injection-box and vacuum-pressure-unit, which is able to produce instantaneously, homogeneous and reproducible concentration fields. Finally a Lagrangian-Particle-Tracking-Method was developed to transfer the results, obtained locally at single groin fields, into the overall transport characteristics in the far-field of pollutant spill scenario for a river system consisting of a series of groin fields. Through the implementation of a transient-adhesion-boundary, it was possible to parameterize the influence of groin fields on the longitudinal dispersion, the transport velocity and the skewness of the concentration distribution in the case of a pollutant spill.
Eine neue Methode zur Quellenlokalisierung auf der Basis räumlich verteilter, punktweiser Konzentrationsmessungen
Creators: name: Matthes, Jörg
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Konzentrationsmessung

description: Zahlreiche Anwendungen erfordern das Lokalisieren der Emissionsquelle bestimmter Luftbeimengungen. Beispiele hierfür sind die Leckageer-kennung in Gefahrenstofflagern und die Luftqualitätsüberwachung von Deponien. Die Grundlage einer solchen Quellenlokalisierung stellen räumlich verteilte Online-Konzentrationsmessungen dar, die beispiels-weise durch so genannte Elektronische Nasen ermöglicht werden. In dem vorliegenden Buch werden ausgehend von einem geometrischen Zugang neue, zweistufige Verfahren zur Quellenlokalisierung für die Ausbreitung durch turbulente Diffusion und Advektion vorgestellt. Grundidee des geometrischen Zugangs ist es, zunächst für jeden Sensor die Menge aller Punkte zu bestimmen, auf der sich aus der Sicht des einzelnen Sensors die Quelle befinden kann. Durch Bilden der Schnittmenge für mehrere Sensoren lässt sich dann daraus der Quellort ermitteln. Die entwickelten Verfahren umgehen die numerischen Schwierigkeiten der klassischen ausgangsfehlerbasierten einstufigen Verfahren (Maximum-likelihood-Schätzung) und liefern zudem Aussagen zur Existenz und Eindeutigkeit von Lösungen, zur Lage von Mehrfachlösungen sowie zur geeigneten Platzierung der Sensoren für die Quellenlokalisierung. Zahlreiche Simulationen und Experimente in einem industriellen Chemikalienlager belegen die Leistungsfähigkeit der neuen Verfahren.
ПОДЗЕМНОЕ ВЫЩЕЛАЧИВАНИЕ УРАНА С ИСПОЛЬЗОВАНИЕМ МИКРООРГАНИЗМОВ
Creators: name: Аликулов Шухрат Шарофович
name: Алимов Мехриқул Умарқулович
name: Норкулов Азиз Норпулат Угли
Publisher: name: Journal of Advances in Engineering Technology
Year: 2022
Subjects: бактериальных растворов
подземное выщелачивание
масштаб
забалансов
месторождения кетменчи
bacterial solutions
underground leaching
scale
off-balances
ketmenchi deposits

description: Таким образом, проведенные исследования показали возможность применения бактериальных растворов для доизвлечения урана из отработанных блоков ПВ. Очевидны и экономические преимущества, т.к. исключаются затраты на бурение и оснастку самих скважин и закисление рудного поля.
description: Thus, the conducted studies have shown the possibility of using bacterial solutions for the additional extraction of uranium from spent in-situ leaching blocks. The economic benefits are also obvious. Expenses for drilling and equipment of the wells themselves and acidification of the ore field are excluded.
Dirichlet's Theorem in function fields
Creators: name: Ganguly, Arijit
name: Ghosh, Anish
Publisher: name: arXiv
Year: 2015
Subjects: subject: Number Theory (math.NT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We study metric Diophantine approximation in local fields of positive characteristic. Specifically, we study the problem of improving Dirichlet's theorem in Diophantine approximation and prove very general results in this context.
ЭКОЛОГИЧЕСКАЯ БЕЗОПАСНОСТЬ ВОДНЫХ РЕСУРСОВ БАССЕЙНА АРАЛЬСКОГО МОРЯ
Creators: name: Джумамуратов Д.К.
name: Кдырниязова З.
Publisher: name: Journal of Advances in Engineering Technology
Year: 2022
Subjects: экологическая безопасность
устойчивое развитие
водные ресурсы
социальные критерии
водный баланс водопользования
очистка воды и повторное использование
бассейн Аральского моря
environmental safety
sustainable development
water resources
scientific research
water balance of water use
water purification and recycling
Aral Sea basin
ekologik xavfsizlik
barqaror rivojlanish
suv resurslari
ijtimoiy mezonlar
suvdan foydalanishning suv balansi
suvni tozalash va qayta foydalanish
Orol dengizi havzasi

description: В данной работе рассмотрены критерии экологической безопасности устойчивого управления водными ресурсами государств бассейна Аральского моря, которые зависят от степени обще региональной интеграции экономики, т.е. внедрению водосберегающих технологии и водо-охранных мероприятий к экологически допустимому уровню использования водных ресурсов.
description: This paper discusses about the criteria for sustainable water resources management in the Aral Sea basin, which depends on the level of general regional integration of the economy, i.e. the introduction of water-saving technologies and water conservation measures to an environmentally acceptable level of water resources use.
Strong convergence rates for nonlinearity-truncated Euler-type approximations of stochastic Ginzburg-Landau equations
Creators: name: Becker, Sebastian
name: Jentzen, Arnulf
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 60H35, 65C30, 60H15

description: This article proposes and analyzes explicit and easily implementable temporal numerical approximation schemes for additive noise-driven stochastic partial differential equations (SPDEs) with polynomial nonlinearities such as, e.g., stochastic Ginzburg-Landau equations. We prove essentially sharp strong convergence rates for the considered approximation schemes. Our analysis is carried out for abstract stochastic evolution equations on separable Banach and Hilbert spaces including the above mentioned SPDEs as special cases. We also illustrate our strong convergence rate results by means of a numerical simulation in Matlab.
description: 58 pages
title: Does Parental Acceptance/Warmth Moderate Longitudinal Bidirectional Associations Between Parents and Childrens Internalizing Psychopathology?
Creators: name: Tobin, Kaitlyn
Publisher: name: Georgia State University
Year: 2023

description:
The current study assessed 1) whether there are bidirectional associations between parent-reported parent-to-child and/or child-to-parent internalizing psychopathology from middle childhood to preadolescence, 2) if child-reported parental acceptance/warmth moderates bidirectional associations, and 3) if bidirectional associations vary by parent-child sex dyad. A sample of 11,878 9/10-year-old children (48% female) at the baseline of the Adolescent Brain Cognitive Development (ABCD) study and follow-up two years later (N=6,552) completed child-report parental acceptance/warmth and parent-report childrens and parents internalizing psychopathology measures. Path analysis revealed 1) significant, yet small, parent-to-child and child-to-parent bidirectional associations of internalizing psychopathology, 2) parental acceptance/warmth neither moderated parent-to-child nor child-to-parent bidirectional associations, and 3) the most parsimonious model constrained parent-child sex dyad bidirectional associations to equality. These results suggest additional risk is conferred by longitudinal parent-to-child and child-to-parent transmission that is not accounted for by concurrent associations between parents and childrens internalizing problems or stability of internalizing problems across time.
Well separated trion and neutral excitons on superacid treated MoS2 monolayers
Creators: name: Cadiz, Fabian
name: Tricard, Simon
name: Gay, Maxime
name: Lagarde, Delphine
name: Wang, Gang
name: Robert, Cedric
name: Renucci, Pierre
name: Urbaszek, Bernhard
name: Marie, Xavier
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Developments in optoelectronics and spin-optronics based on transition metal dichalcogenide monolayers (MLs) need materials with efficient optical emission and well-defined transition energies. In as-exfoliated MoS2 MLs the photoluminescence (PL) spectra even at low temperature consists typically of broad, overlapping contributions from neutral, charged excitons (trions) and localized states. Here we show that in superacid treated MoS2 MLs the PL intensity increases by up to 60 times at room temperature. The neutral and charged exciton transitions are spectrally well separated in PL and reflectivity at T=4 K, with linewidth for the neutral exciton of 15 meV, but with similar intensities compared to the ones in as-exfoliated MLs at the same temperature. Time resolved experiments uncover picoseconds recombination dynamics analyzed separately for charged and neutral exciton emission. Using the chiral interband selection rules, we demonstrate optically induced valley polarization for both complexes and valley coherence for only the neutral exciton.
Simulation study of a new InGaN p-layer free Schottky based solar cell
Creators: name: Adaine, Abdoulwahab
name: Hamady, Sidi Ould Saad
name: Fressengeas, Nicolas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: On the road towards next generation high efficiency solar cells, the ternary Indium Gallium Nitride (InGaN) alloy is a good passenger since it allows to cover the whole solar spectrum through the change in its Indium composition. The choice of the main structure of the InGaN solar cell is however crucial. Obtaining a high efficiency requires to improve the light absorption and the photogenerated carriers collection that depend on the layers parameters, including the Indium composition, p-and n-doping, device geometry.. . Unfortunately, one of the main drawbacks of InGaN is linked to its p-type doping, which is very difficult to realize since it involves complex technological processes that are difficult to master and that highly impact the layer quality. In this paper, the InGaN p-n junction (PN) and p-in junction (PIN) based solar cells are numerically studied using the most realistic models, and optimized through mathematically rigorous multivariate optimization approaches. This analysis evidences optimal efficiencies of 17.8% and 19.0% for the PN and PIN structures. It also leads to propose, analyze and optimize player free InGaN Schottky-Based Solar Cells (SBSC): the Schottky structure and a new MIN structure for which the optimal efficiencies are shown to be a little higher than for the conventional structures: respectively 18.2% and 19.8%. The tolerance that is allowed on each parameter for each of the proposed cells has been studied. The new MIN structure is shown to exhibit the widest tolerances on the layers thicknesses and dopings. In addition to its being player free, this is another advantage of the MIN structure since it implies its better reliability. Therefore, these new InGaN SBSC are shown to be alternatives to the conventional structures that allow removing the p-type doping of InGaN while giving photovoltaic (PV) performances at least comparable to the standard multilayers PN or PIN structures.
description: Superlattices and Microstructures, Elsevier, 2016
Electrochemical SPM study of 2D phase and 3D phase formation of Zn at the ionic liquid / Au(111) interface [online]
Creators: name: Dogel, Jana
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: STM
zinc
electrochemistry
layer growth
spinodal decomposition

description: Zn electrodeposition in the under- (UPD) and overpotential (OPD) ranges by means of in-situ Scanning Tunneling Microscopy (STM) was examined, supported by in-situ cyclic voltammetry and chronoamperometrie. The underpotential deposition of Zn follows a layer-by-layer growth. For the first time the formation of three successive Zn monolayers has been observed in the UPD range. It has been shown, that the UPD of Zn is complicated due to surface alloying. The same growth mechanism extends from the UPD into OPD range until Al bulk deposition sets in. The UPD of Al at 100 mV vs. Zn/Zn(II) is marked by Moiré pattern formation. For the first time in this system the effective tunneling barrier f has been measured by STS. A first insight into the 2D phase formation of electrodeposited Zn at the electrolyte / electrode interface was obtained from STM images at various times and potentials. Before a coherent layer is formed wormlike structures are observed characteristic of spinodal decomposition. This implies a first order phase transition, which has been resolved here for the first time for 2D electrodeposition.
Entwicklung eines Inline-Viskosimeters auf Basis eines magnetisch-induktiven Durchflussmessers [online]
Creators: name: Hans, Annegret
Publisher: name: KIT Scientific Publishing
Year: 2003
Subjects: Viskosimeter
Viskosimetrie
Profil Strömung
Magnetisch-induktive Durchflussmessung
Nichtnewtonsche Flüssigkeit

description: Die Viskosität ist in vielen industriellen Bereichen ein wichtiger Parameter für die Materialcharakterisierung und die Sicherung der Produktqualität. Für eine effiziente Prozesskontrolle ist dabei eine kontinuierliche und direkte Erfassung dieser Größe notwendig. Häufig erfolgt in der laufenden Produktion die Überwachung noch über Offline-Messungen, an Online- und vor allem Inline-Prozessmessgeräten besteht großer Bedarf. Im Rahmen dieser Dissertation wurde ein nicht-invasives Inline-Prozessviskosimeter entwickelt. Geringe Modifikationen eines magnetisch-induktiven Durchflussmessers erlauben die Bestimmung zweier vom Strömungsprofil abhängiger Messgrößen. Unter Verwendung von a priori Wissen in Form eines rheologischen Parametermodells wird hieraus in Kombination mit einem Differenzdrucksensor, der einen weiteren rheologischen Parameter liefert die Viskosität des strömenden Materials bestimmt. Für die Auslegung des Messsystems wurde der Sensor mit numerischen Methoden modelliert. Durch Vermessung des Magnetfeldes wurde die Sensormodellierung verifiziert und im Weiteren das rheologische Modell mittels Laser-Doppler-Anemometrie validiert. Experimentelle Untersuchungen sowohl im Labor als auch im Produktionsumfeld haben die Praxistauglichkeit des Prozessviskosimeters belegt.
Similarity of ensembles of trajectories of reversible and irreversible growth processes
Creators: name: Klymko, Katherine
name: Garrahan, Juan P.
name: Whitelam, Stephen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Models of bacterial growth tend to be `irreversible', allowing for the number of bacteria in a colony to increase but not to decrease. By contrast, models of molecular self-assembly are usually `reversible', allowing for addition and removal of particles to a structure. Such processes differ in a fundamental way because only reversible processes possess an equilibrium. Here we show at mean-field level that dynamic trajectories of reversible and irreversible growth processes are similar in that both feel the influence of attractors, at which growth proceeds without limit but the intensive properties of the system are invariant. Attractors of both processes undergo nonequilibrium phase transitions as model parameters are varied, suggesting a unified way of describing reversible and irreversible growth. We also establish a connection at mean-field level between an irreversible model of growth (the magnetic Eden model) and the equilibrium Ising model, supporting the findings made by other authors using numerical simulations.
title: Mesh and model adaptation for hyperbolic balance laws
Creators: name: Joshi, Hrishikesh
Publisher: name: UNSPECIFIED
Year: 2023

description: The objective of mesh and model adaptation is to locally choose the mesh and the model to be employed from a model hierarchy in order to reduce the computational resources needed. We do this by balancing the two sources of error, namely discretization and modelling error. In this work, we devise a mesh and model adaptation strategy for a class of model hierarchies consisting of two levels of model complexity. In particular, the fine model, also referred to as the complex system, consists of a system of hyperbolic balance laws with stiff reaction terms and the coarse model, also referred to as the simple system, consists of a system of hyperbolic conservation laws. The governing equations of the simple system are derived by making a simplifying assumption that the system is in equilibrium, i.e. the speed of the reaction is infinitely fast. Furthermore, the complex system is assumed to have an entropy structure, i.e. it is assumed to be equipped with a strictly convex entropy and entropy flux. The structure of the model hierarchy allows us to show that the simple system is analogously equipped with a strictly convex entropy and entropy flux. The relative entropy stability framework is employed to derive a posteriori error estimates with identifiable contributions of discretization and modelling error estimates. Furthermore, since the use of two different models in the computational domain gives rise to cell boundaries across which the model employed differs, we propose a coupling to be employed at these cell boundaries. In addition, mesh and model coarsening distances are defined, which provide complementary information to the defined error indicators. The defined error indicators and coarsening distances are employed to propose a mesh and model adaptation strategy. The efficacy of the mesh and model adaptation strategy is demonstrated by conducting simulations for chemically reacting fluid mixtures in one space dimension.
Parnassia pusilla Wallich ex Arnott 1837
Creators: name: Shu, Yumin
name: Zhang, Zhixiang
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Celastrales
Parnassiaceae
Parnassia
Parnassia pusilla

description: Parnassia pusilla Wallich ex Arnott (1837: 315)
 Type:— NEPAL: Gossain-than (Gossain-kund), Wall. 1245 (lectotype, designated here: E00301171!; isolectotypes: BM000600009!, E00301172!, K000739368!, K000739369! (exclude the individual with the marker“(2)”); image of the lectotype is available at http://data.rbge.org.uk/herb/ E00301171).
description: Published as part of Shu, Yumin & Zhang, Zhixiang, 2016, Lectotypification of Parnassia pusilla (Celastraceae), pp. 98-100 in Phytotaxa 265 (1) on page 99, DOI: 10.11646/phytotaxa.265.1.13, http://zenodo.org/record/13664409
Konzept für eine modellgestützte Diagnostik mittels Data Mining am Beispiel der Bewegungsanlyse [online]
Creators: name: Loose, Tobias Sebastian
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Data Mining
Merkmalsextraktion
Klassifikator
Fuzzy-Logik
Bewegungsanalyse

description: Mit der Instrumentellen Ganganalyse werden Gelenkwinkel und -momente beim Gehen messtechnisch erfasst. Die klinische Auswertung dieser Daten (Diagnose von Bewegungsstörungen, Therapieplanung und -validierung) erfolgt empirisch durch erfahrene Experten. Schwierigkeiten bei der Analyse sind stark heterogene Datensätze und sehr komplexe Zusammenhänge in Bewegungsdaten. Eine objektive, standardisierte Basis zur Datenauswertung und -interpretation konnte bisher nicht etabliert werden. In der vorliegenden Arbeit wird durch den Einsatz von modularen rechnergestützten Data Mining Verfahren ein Beitrag zur automatisierten, nachvollziehbaren Suche nach Gangpathologien bzw. zur quantitativen Bewertung der Gangqualität verschiedener Patientengruppen geleistet. Diese Arbeit soll zur Unterstützung der empirischen Analyse eingesetzt werden. Die empirische Vorgehensweise wird dabei in einem verallgemeinerten Merkmalsraum abgebildet, um somit interpretierbare Ergebnisse zu erzielen. Zur Datenauswertung kommen verschiedene überwachte und unüberwachte Lernverfahren zum Einsatz. Die Leistungsfähigkeit der Verfahren wird anhand zweier Patientengruppen (infantile Cerebralparese bzw. inkomplette Querschnittlähmung) und Referenzkollektiven demonstriert.
Assessment of Student Discipline Promotion Project on Responsibility and Punctuality of Anubal Don Phai School, Nong Khai Primary Educational Service Area Office 1
Creators: name: Porntep Rattanatisoi
Publisher: name: DR.KEN Institute of Academic Development and Promotion
Year: 2022
Subjects: Project Evaluation
CIPP Model
Discipline

description: Interdisciplinary Academic and Research Journal, 2, 4, 519-540
Numerische Integration von Satellitenbahnen unter Berücksichtigung der Anisotropie des Gravitationsfeldes der Erde
Creators: name: Koenig, Daniel
name: Seitz, Kurt
Publisher: name: KIT Scientific Publishing
Year: 2003
Subjects: Umlaufbahn
Anisotropie
Anisotropes Gravitationsfeld
Erde

description: The present investigation deals with the numerical integration of satellite orbits. As the major contribution to the forces acting on an earth orbiting satellite the anisotropic part of the gravitational field of the earth is given special consideration. The equations of motion are described by a system of first order ordinary differential equations in cartesian earth-fixed coordinates. The main point of the problem is the computation of the gradient of the gravitational potential in the earth-fixed system and the subsequent transformation into the celestial system. The steps which are necessary for this purpose are described in detail. The gravitational potential is approximated by a spherical harmonic expansion of degree and order 360. On this basis a MATLAB program was developed. Several methods for the integration of the equations of motion, available in the MATLAB toolbox, are tested and compared. The comparisons are carried out for two different satellite orbit types, a near-earth orbiting satellite and a high altitude GPS satellite. The final computations are made with the multistep method (predictor-corrector) using the routine ode113 of "The MATLAB Ode Suite". The resulting orbital disturbances are represented as disturbances in the time-dependent corresponding Keplerian orbit elements.
Automatische Registrierung adaptiver Modelle zur Typerkennung technischer Objekte [online]
Creators: name: Laubenheimer, Astrid
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Adaptives Verfahren
Bildverarbeitung
Rekursive Parameterschätzung
Segmentierung
Dreidimensionale geometrische Modellierung

description: Anwendungen der Bildanalyse werden in zunehmendem Maße unter Verwendung dreidimensionaler Modelle realisiert und fusionieren auf diese Weise Methoden der Computergrafik und der Bildauswertung. Mit dem Ziel der automatischen Erfassung dynamischer Szenenaktivitäten ist in den letzten Jahren ein vermehrter Einsatz adaptiver Modelle zu beobachten. In der vorliegenden Arbeit wird ein neu entwickeltes Verfahren zur automatischen Konstruktion adaptiver Modelle für technische Objekte vorgestellt. Ferner werden Module zur automatischen Anpassung dieser adaptiven Modelle an Grauwertbilder beschrieben, die durch Synthese-Analyse-Iterationen die Brücke zur Bildanalyse schlagen. Die zentrale Stärke der vorgestellten Komponenten liegt darin, dass sie aus Einzelbildern dreidimensionale Rekonstruktionen für unbekannte Objektvarianten liefern. Wie experimentell gezeigt wird, sind diese Rekonstruktionen geometrisch genauer als handelsübliche Modelle. Die Leistungsfähigkeit der entwickelten Verfahren wird am Beispiel der Flugzeugtypisierung gezeigt. Darüber hinaus wird die Anwendbarkeit der Module zur Lageschätzung demonstriert.
Interference and dynamics of light from a distance-controlled atom pair in an optical cavity
Creators: name: Neuzner, Andreas
name: Körber, Matthias
name: Morin, Olivier
name: Ritter, Stephan
name: Rempe, Gerhard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Interference is central to quantum physics and occurs when indistinguishable paths exist, like in a double-slit experiment. Replacing the two slits with two single atoms introduces optical non-linearities for which nontrivial interference phenomena are predicted. Their observation, however, has been hampered by difficulties in preparing the required atomic distribution, controlling the optical phases and detecting the faint light. Here we overcome all of these experimental challenges by combining an optical lattice for atom localisation, an imaging system with single-site resolution, and an optical resonator for light steering. We observe resonator-induced saturation of resonance fluorescence for constructive interference of the scattered light and nonzero emission with huge photon bunching for destructive interference. The latter is explained by atomic saturation and photon pair generation. Our experimental setting is scalable and allows one to realize the Tavis-Cummings model for any number of atoms and photons, explore fundamental aspects of light-matter interaction, and implement new quantum information processing protocols.
description: 9 pages, 9 figures
Auswertung von forensischen Riefenspuren mittels automatischer Sichtprüfung [online]
Creators: name: Heizmann, Michael
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Kriminalistik
Spurenauswertung
Bildverarbeitung
Segmentierung
Korrelationsanalyse
Vergleichsverfahren
Automatische Identifikation

description: In der Kriminalistik spielt die Auswertung von Spuren eine wesentliche Rolle, um Zusammenhänge zwischen Delikten herstellen zu können. Eine wichtige Spurengattung umfasst Riefen- oder Ziehspuren, die durch schleifende oder ziehende Bewegung eines Werkzeuges entstehen. Dazu zählen die kriminaltechnisch besonders relevanten Riefenspuren auf Geschossen sowie zahlreiche Arten von Werkzeugspuren, die z. B. von Schraubendrehern, Messern oder Zangen herrühren. Thema der vorliegenden Dissertation ist die automatisierte Auswertung solcher Werkzeugspuren mit Methoden der automatischen Sichtprüfung. Die dargestellte Vorgehensweise macht charakteristische Individualspuren der rechnergestützten Verarbeitung zugänglich und ermöglicht so den Vergleich der Spuren. Hierbei werden spezielle Eigenschaften von Werkzeugspuren berücksichtigt: Im Gegensatz zu Spuren auf Geschossen treten gekrümmte Riefen auf, die eine Begradigung auf Grundlage geeigneter Signalmodelle notwendig machen. Zudem zeigen Werkzeugspuren oft Lücken in der Riefenstruktur, so dass eine zuverlässige Segmentierung des Riefenbereichs unabdingbar ist. Schließlich erfordert die meist unsichere Ausrichtung der Spuren eine Erweiterung üblicher Vergleichsverfahren. Mit derartigen Auswertestrategien wurde ein automatisierter Spurenvergleich auf der Basis von Korrelationsverfahren realisiert. Experimentelle Ergebnisse belegen die Leistungsfähigkeit und Praxistauglichkeit des entwickelten Identifikationssystems.
Assessment of an ultramicroelectrode array (UMEA) sensor for the determination of trace concentrations of heavy metals in water [online]
Creators: name: Xie, Xudong
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Sensor
Chemischer Sensor
Elektrochemischer Sensor
Mikroelektrode
Schwermetall
Geochemie

description: The main objectives of this book are (i) to investigate the electrochemical behavior and the analytical performance of a novel ultramicroelectrode array (UMEA); (ii) to assess the analytical parameters of square-wave anodic stripping voltammetric measurements (SWASV) using the UMEA; and (iii) to estimate the potential of the UMEA in developing decentralised analytical equipments for the determination of trace concentrations of heavy metals in natural waters. Surface analytical techniques (SEM, ESEM, and AFM) showed that the UMEA chips are of high quality in manufacture. Cyclic voltammetric and chronoamperometric experiments proved that the electrochemical behavior of the UMEA is dominated by the features characteristic for single microelectrodes. Chronocoulometry was found to be the most suitable method in generating the Hg-film of good quality. A new UMEA chip could be plated at least ten times, corresponding to about 500 measurements of trace metals in synthetic aqueous solutions. Using SWASV, detection limits of <0.1 ï¿g/l could be achieved for the metals (Pb, Cd). Precision and accuracy were found to be approx +/-10% of RSD. In natural waters, the results obtained with the UMEA sensor showed a reasonably good agreement with HR-ICP-MS analyses. Different experimental parameters were optimised and investigated. Interferences (e.g., DOC) were significantly reduced through medium exchange and standard addition. Ultrasonic bath proved to be very efficient in resurfacing electrodes in laboratory. The UMEA sensor shows a great potential in developing a portable trace metal analyzer. However, for in situ and on-site measurements, the protection of the UMEA sensor from fouling seems to be inevitable. In order to achieve a pure microelectrode behavior with the UMEA, increasing the ratio of interelectrode distance to electrode diameter is recommended for further developments.
Zur Stabilität dynamischer Systeme mit stochastischer Anregung [online]
Creators: name: Simon, Marcus
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Stabilität
Ljapunov-Stabilitätstheorie
Schwingungsverhalten
Stochastik

description: Die Vorgehensweise einer Stabilitätsanalyse stochastisch erregter dynamischer Systeme nach dem Konzept von Khas'minskii wird anhand drei unterschiedlicher Beispiele vorgestellt. Eine Aussage über die Stabilität der betrachteten Lösung erfolgt über das Vorzeichen des größten Ljapunov-Exponenten, der durch die Fürstenberg-Khas'minskii-Gleichung bestimmt werden kann. Hierfür ist die Kenntnis der stationären Verteilungsdichte des Systems notwendig. Diese wird entweder durch direkte Integration des stochastischen Differentialgleichungssystem (Monte-Carlo-Simualtion) oder als Lösung der zugehörigen Fokker-Planck-Gleichung bestimmt. Zunächst wird nochmals mit der Untersuchung gekoppelter Biege- und Torsionsschwingungen auf die Problematik parametererregter Systeme eingegangen. Hierbei steht der Vergleich zweier Koordinatentransformationen im Vordergrund. Beide Transformationen führen gemäß des Konzeptes von Khas'minskii auf ein System nichtlinearer stochastischer Differentialgleichungen mit einer einseitigen Entkopplung des instationären Lösungsanteiles. Anschließend wird die Stabilitätsanalyse auf nichttriviale Lösungen nichtlinearer Systeme mit stochastischer Fremderregung ausgedehnt. Die Variationsgleichungen bilden hier zusammen mit den stochastischen Differentialgleichungen der zu untersuchenden Lösung ein gekoppeltes Differentialgleichungssystem, das die Grundlage für die Berechnung des größten Ljapunov-Exponenten darstellt. In allen drei Beispielen ist zu erkennen, dass die hier verwendete Methode eine effektive Vorgehensweise bei der Bestimmung des größten Ljapunov-Exponenten von Lösungen stochastisch erregter dynamischer Systeme ist.
Closed Loop, Entwicklungsplattform für mechatronische Fahrdynamikregelsysteme [online]
Creators: name: Reitze, Clemens
Publisher: name: KIT Scientific Publishing
Year: 2004
Subjects: Hardware-in-the-Loop
Echtzeitverarbeitung
Simulation
Fahrdynamik
Personenkraftwagen
Motorrad
Anhänger
Modellbildung
Kinematik
Schlupf

description: Schwerpunkt des Buches ist, durch ein aufgabenorientiertes Entwicklungswerkzeug und entsprechende Technologien dazu beizutragen, die Komplexität der Entwicklungsaufgaben besser zu beherrschen. Die vorliegende Arbeit behandelt die Konzeption und Realisierung einer solchen Entwicklungsumgebung. Speziell für den Entwicklungsschwerpunkt Fahrdynamikregelsysteme werden hierbei folgende Anforderungen berücksichtigt: Bedienbarkeit, Durchgängigkeit, Modell- und Datenmanagement, Modularität, Skalierbarkeit, Echtzeitfähigkeit und Automatisierbarkeit. Es wurden leistungsfähige, objektorientierte Modellbibliotheken für die Fahrzeuge Pkw, Motorrad und Pkw-Anhänger und deren verschiedene Baugruppen entwickelt. Die Modelle sind Herstellerübergreifend einsetzbar und genügen den aktuellen Erfordernissen der Fahrdynamik-Reglerentwicklung. Der Reifen-Fahrbahn-Kontakt hat maßgeblichen Einfluss auf das Fahrverhalten und die Fahrsicherheit von Fahrzeugen und stellt für die meisten Fahrdynamik-Regler die wesentliche Eingriffsmöglichkeit auf die Fahrdynamik dar. Die Kinematik des Reifen-Fahrbahn-Kontakts auf gewölbten Fahrbahnen wird als ein Problem der räumlichen Kinematik verstanden und durchgearbeitet. Die Größen Schlupf und Schräglauf werden zum ersten Mal auch für räumliche Fahrbahnen präzise definiert.
Tunneling in energy eigenstates and complex quantum trajectories
Creators: name: Mathew, Kiran
name: John, Moncy V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Complex quantum trajectory approach, which arose from a modified de Broglie-Bohm interpretation of quantum mechanics, has attracted much attention in recent years. The exact complex trajectories for the Eckart potential barrier and the soft potential step, plotted in a previous work, show that more trajectories link the left and right regions of the barrier, when the energy is increased. In this paper, we evaluate the reflection probability using a new ansatz based on these observations, as the ratio between the total probabilities of reflected and incident trajectories. While doing this, we also put to test the complex-extended probability density previously postulated for these quantum trajectories. The new ansatz is preferred since the evaluation is solely done with the help of the complex-extended probability density along the imaginary direction and the trajectory pattern itself. The calculations are performed for a rectangular potential barrier, symmetric Eckart and Morse barriers, and a soft potential step. The predictions are in perfect agreement with the standard results for potentials such as the rectangular potential barrier. For the other potentials, there is very good agreement with standard results, but it is exact only for low and high energies. For moderate energies, there are slight deviations. These deviations result from the periodicity of the trajectory pattern along the imaginary axis and have a maximum value only as much as $0.1 \%$ of the standard value. Measurement of such deviation shall provide an opportunity to falsify the ansatz.
description: Submitted version
Raman spectroscopic study of high temperature rare earth metal - rare earth halide solutions: Ln-LnX3- and LnX2-LnX3-(LiX-KX)eu systems (Ln: Nd, Ce; X: Cl, I) [online]
Creators: name: Rodriguez Betancourtt, V. M.
Publisher: name: Universitätsverlag Karlsruhe
Year: 2003
Subjects: Raman-Spektroskopie
Hochtemperatur
Seltenerdhalogenide

description: In this work new Raman spectroscopic experiments on rare earth metal-rare earth trihalide melts (Ln-LnX3 and LnX2-LnX3: Ln=Ce, Nd; X=Cl, I) and their mixtures in alkali halide eutectic solvents ((LiX-KX)eu; X=Cl, I) are presented. The main results can be summarized as follows: - The Raman spectra of following trihalide systems have been measured for the first time: CeCl3, CeI3, NdI3 and their mixtures in the respective alkali halide eutectic solvent. The structure of the LnX3 in the solvent can be characterized by octahedral complexes. The force constants decrease from the chlorides to the iodides. - The Raman spectra of the following dihalides have been observed in this work: NdCl2, CeI2 and their mixtures in the alkali halide solvent. Interestingly, CeCl2 might form as intermediate species on doping CeCl3 with Ce. It is not a stable compound in the Ce-CeCl3 phase diagram. - With respect to the above mentioned main objective the following conclusions can be drawn: (i) On mixing of NdCl2 with NdCl3 in (LiCl-KCl)eu the undisturbed spectra of both components can be observed simultaneously. This is in agreement with the suggested intervalence charge transfer hopping mechanism if one assumes a hopping rate below 1012. (ii) Even though CeCl2 might form as intermediate, in the equilibrium spectra of liquid Ce-CeCl3-(LiCl-KCl)eu only the typical - 36 CeCl -octahedra can be identified. This supports the assumption that in these systems the electronic defect states are probably mobile Drude-like electrons which do not lead to new Raman detectable species. A qualitatively similar observation was made for CeI2-CeI3-(LiI-KI)eu melts.
The VLA view of the HL Tau Disk - Disk Mass, Grain Evolution, and Early Planet Formation
Creators: name: Carrasco-Gonzalez, Carlos
name: Henning, Thomas
name: Chandler, Claire J.
name: Linz, Hendrik
name: Perez, Laura
name: Rodriguez, Luis F.
name: Galvan-Madrid, Roberto
name: Anglada, Guillem
name: Birnstiel, Til
name: van Boekel, Roy
name: Flock, Mario
name: Klahr, Hubert
name: Macias, Enrique
name: Menten, Karl
name: Osorio, Mayra
name: Testi, Leonardo
name: Torrelles, Jose M.
name: Zhu, Zhaohuan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The first long-baseline ALMA campaign resolved the disk around the young star HL Tau into a number of axisymmetric bright and dark rings. Despite the very young age of HL Tau these structures have been interpreted as signatures for the presence of (proto)planets. The ALMA images triggered numerous theoretical studies based on disk-planet interactions, magnetically driven disk structures, and grain evolution. Of special interest are the inner parts of disks, where terrestrial planets are expected to form. However, the emission from these regions in HL Tau turned out to be optically thick at all ALMA wavelengths, preventing the derivation of surface density profiles and grain size distributions. Here, we present the most sensitive images of HL Tau obtained to date with the Karl G. Jansky Very Large Array at 7.0 mm wavelength with a spatial resolution comparable to the ALMA images. At this long wavelength the dust emission from HL Tau is optically thin, allowing a comprehensive study of the inner disk. We obtain a total disk dust mass of 0.001 - 0.003 Msun, depending on the assumed opacity and disk temperature. Our optically thin data also indicate fast grain growth, fragmentation, and formation of dense clumps in the inner densest parts of the disk. Our results suggest that the HL Tau disk may be actually in a very early stage of planetary formation, with planets not already formed in the gaps but in the process of future formation in the bright rings.
description: Accepted by The Astrophysical Journal Letters
Fermionic scenario for the destruction of superconductivity in ultrathin MoC films evidenced by STM measurements
Creators: name: Szabó, P.
name: Samuely, T.
name: Hašková, V.
name: Kačmarčík, J.
name: Žemlička, M.
name: Grajcar, M.
name: Rodrigo, J. G.
name: Samuely, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We use sub-Kelvin scanning tunneling spectroscopy to investigate the suppression of superconductivity in homogeneously disordered ultrathin MoC films. We observe that the superconducting state remains spatially homogeneous even on the films of 3 nm thickness. The vortex imaging suggests the global phase coherence in our films. Upon decreasing thickness, when the superconducting transition drops from 8.5 to 1.2 K, the superconducting energy gap follows perfectly Tc. All this is pointing to a two-stage fermionic scenario of the superconductor-insulator transition (SIT) via a metallic state as an alternative to the direct bosonic SIT scenario with a Cooper-pair insulating state evidenced by the last decade STM experiments.
description: 6 pages, 4 figures
Resonance-based Detection of Magnetic Nanoparticles and Microbeads Using Nanopatterned Ferromagnets
Creators: name: Sushruth, Manu
name: Ding, Junjia
name: Duczynski, Jeremy
name: Woodward, Robert C.
name: Begley, Ryan
name: Fangohr, Hans
name: Fuller, Rebecca O.
name: Adeyeye, Adekunle O.
name: Kostylev, Mikhail
name: Metaxas, Peter J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Biosensing with ferromagnet-based magnetoresistive devices has been dominated by electrical detection of particle-induced changes to the devices' static magnetic configuration. There are however potential advantages to be gained from using field dependent, high frequency magnetization dynamics for magnetic particle detection. Here we demonstrate the use of nano-confined ferromagnetic resonances in periodically patterned magnetic films for the detection of adsorbed magnetic particles with diameters ranging from 6 nm to 4 $μ$m. The nanopatterned films contain arrays of holes which can act as preferential adsorption sites for small particles. Hole-localized particles act in unison to shift the resonant frequencies of the various modes of the patterned layer with shift polarities determined by the localization of each mode within the nanopattern's repeating unit cell. The same polarity shifts are observed for a large range of coverages, even when hole-localized particles are covered by quasi-continuous particle sheets. For large particles however, preferential adsorption no longer occurs, leading to resonance shifts with polarities which are independent of the mode localization. Analogous shifts are seen in continuous layers where, for small particles, the shift of the layer's fundamental mode is typically about 10 times less than in patterned systems and induced by relatively weak fields emanating beyond the particle in the direction of the static applied field. This highlights the importance of having confined modes consistently positioned with respect to nearby particles.
description: 31 pages, 15 figures
Discrete Li-occupation versus pseudo-continuous Na-occupation and their relationship with structural change behaviors in Fe2(MoO4)3
Creators: name: Yue, Ji-Li
name: Zhou, Yong-Ning
name: Shi, Si-Qi
name: Shadike, Zulipiya
name: Huang, Xuan-Qi
name: Luo, Jun
name: Yang, Zhen-Zhong
name: Li, Hong
name: Gu, Lin
name: Yang, Xiao-Qing
name: Fu, Zheng-Wen
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The key factors governing the single-phase or multi-phase structural change behaviors during the intercalation/deintercalation of guest ions have not been well studied and understood yet. Through systematic studies of orthorhombic Fe2(MoO4)3 electrode, two distinct guest ion occupation paths, namely discrete one for Li and pseudo-continuous one for Na, as well as their relationship with single-phase and two-phase modes for Na1 and Li1, respectively during the intercalation/deintercalation process have been demonstrated. For the first time, the direct atomic-scale observation of biphasic domains (discrete occupation) in partially lithiated Fe2(MoO4)3 and the one by one Na occupation (pseudo-continuous occupation) at 8d sites in partially sodiated Fe2(MoO4)3 are obtained during the discharge processes of Li/Fe2(MoO4)3 and Na/Fe2(MoO4)3 cells respectively. Our combined experimental and theoretical studies bring the new insights for the research and development of intercalation compounds as electrode materials for secondary batteries.
description: Scientific Reports, 2015
Stata codes: Does improved cooking fuel empower women? Evidence from India
Creators: name: Husain, Zakir
name: Lee, YuJung Julia
name: Dutta, Mousumi
Publisher: name: Zenodo
Year: 2023
Subjects: Clean fuel
Average Treatment Effect
Control function
Empowerment

description: Stata codes (IC, Version 15) used for the analysis of impact of choice of clean fuel on empowerment of women using the fifth round of the Demographic Health Survey data. After downloading the Individual file from the DHS site (India: 2019-21) the variables given in the excel sheet should be kept.
description: The study is not funded by any organization
Haemodynamics and left ventricular performance in normotensive and hypertensive pregnancy
Creators: name: Lim., Yean-leng
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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