WorldCat Identities

Wagner, Barbara

Works: 155 works in 206 publications in 2 languages and 540 library holdings
Genres: Exhibition catalogs  Pictorial works  History 
Roles: Author, Contributor, Creator, Other, Editor, Illustrator, dgs, Adapter
Classifications: NC251.S376, 759.3
Publication Timeline
Most widely held works by Barbara Wagner
Corporeal identity die Medialisierung des Körperbildes in der Kunst um 1970 ; Identitätsfragen und deren Reflexion mittels verfremdeter Körperbilder by Barbara Wagner( )

11 editions published between 2003 and 2006 in German and held by 43 WorldCat member libraries worldwide

Thomas Schütte : Zeichnungen = drawings by Thomas Schütte( Book )

6 editions published in 2006 in German and English and held by 37 WorldCat member libraries worldwide

Metall-Komplexe mit Aminosäuren, deren Derivaten und Vorläufern by Barbara Wagner( Book )

4 editions published in 1991 in German and Undetermined and held by 18 WorldCat member libraries worldwide

Derivation and analysis of lubrication models for two-layer thin-films by Sebastian Jachalski( )

1 edition published in 2014 in English and held by 16 WorldCat member libraries worldwide

Krieg spielen : Kunst und Propaganda vor dem Ersten Weltkrieg( Book )

1 edition published in 2014 in German and held by 16 WorldCat member libraries worldwide

Linear stability of a ridge by John R King( )

2 editions published in 2005 in English and held by 12 WorldCat member libraries worldwide

We investigate the stability of the three-phase contact-line of a thin liquid ridge on a hydrophobic substrate for flow driven by surface tension and van der Waals forces. We study the role of slippage in the emerging instability at the three-phase contact-line by comparing the lubrication models for no-slip and slip-dominated conditions at the liquid/substrate interface. For both cases we derive a sharp-interface model via matched asymptotic expansions and derive the eigenvalues from a linear stability analysis of the respective reduced models. We compare our asymptotic results with the eigenvalues obtained numerically for the full lubrication models
Lubrication models with small to large slip lengths by Andreas Münch( )

2 editions published in 2005 in English and held by 12 WorldCat member libraries worldwide

A set of lubrication models for the thin film flow of incompressible fluids on solid substrates is derived and studied. The models are obtained as asymptotic limits of the Navier-Stokes equations with the Navier-slip boundary condition for different orders of magnitude for the slip-length parameter. Specifically, the influence of slip on the dewetting behavior of fluids on hydrophobic substrates is investigated here. Matched asymptotics are used to describe the dynamic profiles for dewetting films and comparison is given with computational simulations. The motion of the dewetting front shows transitions from being nearly linear in time for no-slip to $t^{2/3}$ as the slip is increased. For much larger slip lengths the front motion appears to become linear again. Correspondingly, the dewetting profiles undergo a transition from oscillatory to monotone decay into the uniform film layer for large slip. Increasing the slip further, to very large values, is associated with an increasing degree of asymmetry in the structure of the dewetting ridge profile
Two-phase flow model for concentrated suspensions by Tobias Ahnert( )

2 editions published in 2013 in English and held by 11 WorldCat member libraries worldwide

Untersuchungen zur Nutzung der delta 15 N-Werte verschiedener Stickstoffquellen zur Aufklärung von Stickstoffflüssen in Winterweizenbeständen by Barbara Wagner( Book )

2 editions published in 1997 in German and held by 10 WorldCat member libraries worldwide

CheckAp Der Apotheken-Coach entspannter durch den Apothekenalltag by Barbara Wagner( )

2 editions published in 2011 in German and held by 10 WorldCat member libraries worldwide

Anisotropic surface energy formulations and their effect on stability of a growing thin film( )

1 edition published in 2012 in English and held by 9 WorldCat member libraries worldwide

A phase-field model for solid-state dewetting and its sharp-interface limit( )

1 edition published in 2014 in English and held by 8 WorldCat member libraries worldwide

We propose a phase field model for solid state dewetting in form of a Cahn-Hilliard equation with weakly anisotropic surface energy and a degenerate mobility together with a free boundary condition at the film-substrate contact line. We derive the corresponding sharp interface limit via matched asymptotic analysis involving multiple inner layers. The resulting sharp interface model is consistent with the pure surface diffusion model. In addition, we show that the natural boundary conditions, as indicated from the first variation of the total free energy, imply a contact angle condition for the dewetting front, which, in the isotropic case, is consistent with the well-known Young's equation
Sharp-interface formation during lithium intercalation into silicon by Esteban Meca( )

1 edition published in 2016 in English and held by 8 WorldCat member libraries worldwide

In this study we present a phase-field model that describes the process of intercalation of Li ions into a layer of an amorphous solid such as a-Si. The governing equations couple a viscous Cahn-Hilliard-Reaction model with elasticity in the framework of the Cahn-Larché system. We discuss the parameter settings and flux conditions at the free boundary that lead to the formation of phase boundaries having a sharp gradient in ion concentration between the initial state of the solid layer and the intercalated region. We carry out a matched asymptotic analysis to derive the corresponding sharp-interface model that also takes into account the dynamics of triple points where the sharp interface in the bulk of the layer intersects the free boundary. We numerically compare the interface motion predicted by the sharp-interface model with the long-time dynamics of the phase-field model
Anisotropy in wavelet based phase field models( )

1 edition published in 2014 in English and held by 8 WorldCat member libraries worldwide

Anisotropy is an essential feature of phase-field models, in particular when describing the evolution of microstructures in solids. The symmetries of the crystalline phases are reflected in the interfacial energy by introducing corresponding directional dependencies in the gradient energy coefficients, which multiply the highest order derivative in the phase-field model. This paper instead considers an alternative approach, where the anisotropic gradient energy terms are replaced by a wavelet analogue that is intrinsically anisotropic and linear. In our studies we focus on the classical coupled temperature - Ginzburg-Landau type phase-field model for dendritic growth. For the resulting derivative-free wavelet analogue existence, uniqueness and continuous dependence on initial data for weak solutions is proved. The ability to capture dendritic growth similar to the results obtained from classical models is investigated numerically
Thin-film electrodes for high-capacity lithium-ion batteries: Influence of phase transformations on stress by Esteban Meca( )

1 edition published in 2016 in English and held by 8 WorldCat member libraries worldwide

In this study we revisit experiments by Sethuraman et al. [J. Power Sources, 195, 5062 (2010)] on the stress evolution during the lithiation/delithiation cycle of a thin film of amorphous silicon. Based on recent work that show a two-phase process of lithiation of amorphous silicon, we formulate a phase-field model coupled to elasticity in the framework of Larché-Cahn. Using an adaptive nonlinear multigrid algorithm for the finite-volume discretization of this model, our two-dimensional numerical simulations show the formation of a sharp phase boundary between the lithiated and the amorphous silicon that continues to move as a front through the thin layer. We show that our model captures the nonmonotone stress loading curve and rate dependence, as observed in experiments and connects characteristic features of the curve with the stucture formation within the layer. We take advantage of the thin film geometry and study the corresponding one-dimensional model to establish the dependence on the material parameters and obtain a comprehensive picture of the behaviour of the system
Daumier und sein Paris : Kunst und Technik einer Metropole by Honoré Daumier( Book )

2 editions published in 2010 in German and held by 8 WorldCat member libraries worldwide

Das Museum für Kunst und Technik des 19. Jahrhunderts zeigt Honoré Daumier (1808-1879) in der Ausstellung "Daumier und sein Paris. Kunst und Technik einer Metropole". Daumier war ein scharfer, tagesaktueller Beobachter der vielen Veränderungen und Umbrüche in der ersten modernen Metropole des Industriezeitalters: Paris. Georges-Eugène Baron Haussmann (1809-1891), seit 1853 Präfekt von Paris, setzte die ehrgeizigen Pläne Kaiser Napoleons III. zur Modernisierung der Metropole um. Sowohl unhaltbare hygienische Zustände als auch der Wegfall der alten Stadtverteidigungsanlagen hatten eine Stadterneuerung erforderlich gemacht. Mit einem beispiellosen Kraftakt sollten nicht nur die letzten mittelalterlichen Baustrukturen zu Gunsten grosszügiger Boulevards beseitigt werden, sondern gleichzeitig durch eine geschickte Strassenführung jene Bezirke begrenzt werden, aus denen soziale Unruhen zu befürchten waren. Die 'Haussmannisierung' von Paris provozierte Proteste. Ausstellung: Museum für Kunst und Technik des 19. Jahrhunderts Baden-Baden, 18.9.2010-20.3.2011
Apparent slip for an upper convected Maxwell fluid by Andreas Münch( )

1 edition published in 2016 in English and held by 8 WorldCat member libraries worldwide

In this study the flow field of a nonlocal, diffusive upper convected Maxwell (UCM) fluid with a polymer in a solvent undergoing shearing motion is investigated for pressure driven planar channel flow and the free boundary problem of a liquid layer on a solid substrate. For large ratios of the zero shear polymer viscosity to the solvent viscosity, it is shown that channel flows exhibit boundary layers at the channel walls. In addition, for increasing stress diffusion the flow field away from the boundary layers undergoes a transition from a parabolic to a plug flow. Using experimental data for the wormlike micelle solutions CTAB/NaSal and CPyCl/NaSal, it is shown that the analytic solution of the governing equations predicts these signatures of the velocity profiles. Corresponding flow structures and transitions are found for the free boundary problem of a thin layer sheared along a solid substrate. Matched asymptotic expansions are used to first derive sharp-interface models describing the bulk flow with expressions for an apparent slip for the boundary conditions, obtained by matching to the flow in the boundary layers. For a thin film geometry several asymptotic regimes are identified in terms of the order of magnitude of the stress diffusion, and corresponding new thin film models with a slip boundary condition are derived
Models for the two-phase flow of concentrated suspensions( )

1 edition published in 2014 in English and held by 8 WorldCat member libraries worldwide

A new two-phase model for concentrated suspensions is derived that incorporates a constitutive law combining the rheology for non-Brownian suspension and granular flow. The resulting model naturally exhibits a Bingham-type flow property. This property is investigated in detail for the simple geometry of plane Poiseuille flow, where an unyielded or jammed zone of finite width arises in the center of the channel. For the steady state of this problem, the governing equation are reduced to a boundary value problem for a system of ordinary differential equations and the dependence of its solutions are analyzed by using phase-space methods. For the general time-dependent case a new drift-flux model is derived for the first time using matched asymptotic expansions that take account of the boundary layers at the walls and the interface between the yielded and unyielded region. Using the drift-flux model, the behavior of the suspension flow, in particular the appearance and evolution of unyielded or jammed regions is then studied numerically for different choices of the parameters
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German (29)

English (15)