bluuebunny/crossref_metadata_2025_split huggingface dataset:
How to become your own worst adversary: examining the connection between managerial attributions and organizational relationships with public interest stakeholders
Authors: Mattingly James E. 
Published: January 2007

Abstract

According to numerous studies across multiple disciplines in the social sciences, business organizations tend to develop adversarial relationships with representatives of the public interest. A survey of 62 Public Affairs Managers in publicly held U.S. corporations finds that organizations adopt relational styles similar to those theorized in studies of inter‐organizational conflict, organizational communication and stakeholder management. Empirical results support the descriptive power of a two‐dimensional model reflecting four relational styles that participating organizations exhibited: avoidance, compliance, co‐optation and negotiation. The two dimensions that constitute the model are cooperativeness and boundary spanning. More importantly, managers who attributed power and legitimacy to public interest group stakeholders reported that their organizations were more likely to cooperate with these stakeholders. On the other hand, managers who perceived public interest groups' claims having urgency were more likely to develop communicative, boundary spanning relationships with public interest groups but these relationships were less likely to be cooperative. Because unhealthy relationships with these groups can be detrimental to an organization's long‐term prospects, managers must be careful to recognize public interest organizations as potent and legitimate potential allies.
Copyright © 2007 John Wiley & Sons, Ltd.
Ausrichtung von Partikeln in stationären Strömungsfeldern
Authors: Altenbach H. , Naumenko K. , Pylypenko S. , Renner B. 
Published: January 2007

AbstractZahlreiche komplexe Kunststoffbauteile für industrielle Anwendungen werden im Spritzgussprozess hergestellt. Um mechanische Eigenschaften zu verbessern, verstärkt man u. a. die Kunststoffe mit Kurzglasfasern. Die Eigenschaften hängen dabei von der Faserorientierung ab. In dieser Arbeit wird die Ausrichtung eines einzelnen Partikels in einem Strömungsfeld behandelt. Ausgehend von der Drehimpulsbilanz wird die Bewegungsgleichung für die Drehung des Partikels hergeleitet. Es werden Konstitutivannahmen für die Wechselwirkung mit dem umgebenden Medium gemacht, effiziente numerische Lösungsverfahren werden diskutiert und die erhaltene Lösung wird mit der traditionellen Lösung nach Jeffery [1] verglichen. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Modeling of non‐classical thermoelasticity
Authors: Bargmann Swantje , Steinmann Paul 
Published: January 2007

AbstractThe present contribution deals with computational modeling of non‐classical theories according to the approach of Green and Naghdi [1]. Their theory is subdivided into three types of heat conduction, labeled type I, II and III. Each of the three heat equations is coupled with the balance of momentum. The arising partial di.erential equations are discretized with a Galerkin finite element method in time as well as in space. All three types are applied to an isotropic and homogeneous elastic‐deformable continuum and studied by a numerical example. The reader is also referred to [2, 3] for a more detailed description of the introduced results. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Analysis of wave propagation in the fluid‐saturated porous media
Authors: Chen Zhiyun , Steeb Holger , Diebels Stefan 
Published: January 2007

AbstractIn the present work, a so‐called hybrid two‐phase model composed of a materially incompressible solid and a compressible pore fluid is studied. The mechanical behavior is described by the thermodynamically consistent Theory of Porous Media (TPM). Numerical experiments were performed with the space‐time coupled discontinuous galerkin (DGT)‐method. The existence of two compressional waves (P‐waves) and one shear wave (S‐wave) was confirmed. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
An analytical solution of a 3d problem of magnetoelasticity
Authors: Dashko Olga 
Published: January 2007

AbstractA behavior of the soft ferromagnetic solid in a magnetic field is conventionally investigated with the framework of the developed by Brown, Pao and Yeh linear theory of magnetoelasticity. Beside of the general two‐dimensional magnetoelastic problems have been successfully studied by Shindo and other researchers, the three‐dimensional problems of magnetoelasticity have not been explored with some exceptions. For example the case of infinite solid with an ellipsoidal inclusion when its shape is essentially compressed in the direction of magnetic field propagation was considered using the series of simplifying assumptions. In the present paper a new approach to finding the solution for the solid with an inclusion of arbitrary ellipsoidal shape was offered. The problem was solved using a general method of constructions the exact analytical solutions of the static problem, which has been developed by Podil'chuk on the basis of Fourier method. This method implies the using of curvilinear coordinates and separating of variables in the governing equations. As a result magnetoelastic stresses was obtained in the closed form. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Phase transition processes of pore fluids in porous materials
Authors: Graf T. , Ehlers W. 
Published: January 2007

AbstractTaking a closer look on, e. g., storage processes of greenhouse gases in deep geological aquifers or pressure decreases in dilatant shear bands, the observation can be made that pressure and temperature changes in porous materials can induce phase transition processes of the respective pore fluids. For a numerical simulation of this behaviour, a continuum mechanical model based on a multiphasic formulation embedded in the well‐founded framework of the Theory of Porous Media (TPM) is presented in this contribution. The single phases are an elasto‐viscoplastic solid skeleton, a materially compressible pore gas consisting of the components air and gaseous pore water (water vapour) and a materially incompressible pore liquid, i. e., liquid pore water. The numerical treatment is based on the weak formulations of the governing equations, whereas the primary variables are the temperature of the mixture, the displacement of the solid skeleton and the effective pressures of the pore fluids. An initial boundary‐value problem is discussed in detail, where the resulting system of strongly coupled differential‐algebraic equations is solved by the FE tool PANDAS. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Size Effects due to the Formation of Interphases in Polymer Joints
Authors: Johlitz Michael , Steeb Holger , Diebels Stefan 
Published: January 2007

AbstractIn this contribution we investigate the numerical modelling of polymer bonds under quasi‐static and isothermal conditions. From experimental investigations it is known that polymers form interphases in contact with substrates. These interphases influence the macroscopic material behaviour in the form of size effects, which are observed either in the form “Smaller is Stiffer” or “Smaller is Weaker” depending on the substrate. Taking the formation of the microstructure into account, we postulate an additional balance equation based on an abstract scalar‐valued structure parameter which offers us a way to consider the interphases. We investigate the coupled model consisting of the balance of linear momentum and the balance of the structure parameter by finite element analysis. Different numerical examples are shown. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Beschreibung der Zeitskalenproblematik bei Bremsvorgängen
Authors: Müller M. , Ostermeyer G. P. 
Published: January 2007

AbstractDas globale Reib‐ und Verschleißverhalten von Bremssystemen ist eng gekoppelt an dasWachstum und die Zerstörung charakteristischer mesoskopischer Strukturen auf der Oberfläche eines Bremsbelages [1]. Diese reibintensiven “Patches” tragen einen Großteil der Reibleistung und stellen durch ihre Härte [2] ein “Schutzschild” für darunter befindliches weicheres Material dar. Aus diesem Grund ist es im Allgemeinen bei Bremssystemen nicht möglich, Reibung und Verschleiß zu separieren. Die aus dem Auf‐ und Abbau der Patches resultierende Wechselwirkung zwischen Reibung und Verschleiß ist mit Hilfe eines dynamischen Reibgesetzes [3] formuliert worden, womit es bereits möglich ist, einfache Phänomene, wie zum Beispiel das Fading oder Hystereseverläufe auf verschiedenen Zeitskalen abzubilden. Um einen detaillierteren Einblick in die Dynamik der Grenzschicht zu erhalten, wurde eine Diskretisierung mit einem Zellulären Automaten eingeführt [4]. Mit Hilfe der definierten Eigenschaften (inneren Variablen) “Temperatur”, “Status”, “Verschleißpartikeldichte” und “Normalleistung” und deren Verknüpfung durch einen implementierten Satz von Regeln konnten die wesentlichen Mechanismen abgebildet [5] und somit die Konsistenz des Regelwerkes nachgewiesen werden. Dabei ist die Problemstellung konfrontiert mit einem breiten Spektrum an Zeitskalen. Eine Konkretisierung des Problems sowie eine Möglichkeit zur Lösung werden in diesem Paper vorgestellt. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Phase field simulations in ferroelectric materials
Authors: Schrade D. , Müller R. , Gross D. 
Published: January 2007

AbstractThe hindering of domain wall movement by defects in ferroelectric materials is closely connected to electric fatigue. A movable domain wall in a ferroelectric material in most cases is modelled as a singular surface which allows the use of configurational forces. In contrast, the present approach treats the polarization as an order parameter, extending the total energy by a phase separation energy and a domain wall energy. The polarization then no longer has a discontinuity at the domain wall but is a continuous vector field (phase field). As an example, a numerical simulation of domain evolution under stress free boundary conditions is presented. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
FSI of a Simplified Aero Engine Compressor Cascade Configuration
Authors: Schrape Sven , Kühhorn Arnold , Golze Mark 
Published: January 2007

AbstractA first approach of fully coupled computations of blade vibrations in a two dimensional compressor cascade configuration will be presented in this article. The simulations are realised applying an explicit, partitioned coupling approach between established CFD‐ and FEM‐codes. Investigations are focussed on numerical effects and behaviour on blade vibrations such as damping and frequency shift dependent on inviscid, subsonic flow parameters. The theoretical background, modelling steps and computational results of numerical experiments are discussed. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
On the influence of electric currents on plastic deformation
Authors: Unger Jaan , Stiemer Marcus , Svendsen Bob , Blum Heribert 
Published: January 2007

AbstractElectromagnetic sheet metal forming (EMF) is a high‐speed forming process driven by the dynamics of a coupled electromagneticmechanical system. The purpose of the current work is the investigation of a possible reduction in the yield stress due to electric currents. While thermoelastic and viscoplastic effects are well‐understood, the possible influence of electric currents on dislocation motion, generally referred to as the electro‐plastic effect [3], is still an unresolved issue. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Prediction of Energy Barriers due to Nucleation in Solid‐to‐Solid Phase–Transitions
Authors: Bartel Thorsten , Hackl Klaus 
Published: January 2007

AbstractThis contribution generally aims at the application of the multiscale‐FEM to problems arising from inhomogeneities of arbitrary shape within a solid matrix material. In the context of our work, the inhomogeneity represents a nucleus of a new solid phase. According to the theory of homogeneous nucleation, the model predicts whether it is energetically preferable to initiate the growth of the nucleus or not. The implementation of this procedure into a micromechanical model for shape‐memory alloys is assumed to be suitable to reconstruct the so‐called stress‐drop after the initiation of phase‐transformation as observed in experiments. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Texture evolution and Swift effect in NiAl
Authors: Glüge Rainer , Böhlke Thomas , Bertram Albrecht 
Published: January 2007

AbstractSkrotzki et al. [4] performed free end torsion tests on polycrystaline NiAl at 1000 to 1300 °K, where the texture evolution and the Swift effect have been measured. A material model is formulated and implemented to simulate the torsion tests and compared our results to the experimental findings. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Multiscale FEM in modelling of solution‐precipitation creep
Authors: Ilic Sandra , Hackl Klaus 
Published: January 2007

AbstractIn previous work we proposed a micromechanical model for solution‐precipitation creep based on the minimization of a Lagrangian consisting of elastic power and dissipation. Elastic energy is chosen to be in a standard form but dissipation is strongly adapted to the solution‐precipitation process by introducing two new quantities: the velocity of material transport within the crystallite‐interfaces and the normal velocity of precipitation or solution respectively. Until now only the results for a Voigt‐Sachs model and very simple specimens discretized by FEM were available. Here, our intention is to show results for more realistic examples obtained by using multiscale FEM adapted to the limit case where the ratio between macro and microlevel tends to infinity. In that method the deformation gradient is provided on the macroscale and on the microscale one calculates microfluctuations satisfying periodic boundary conditions. Further calculation yields the effective first Piola‐Kirchhoff stress tensor whose derivative gives the elasticity tensor on the macrolevel. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Multi‐Scale Finite‐Volume Method for Elliptic Problems with Heterogeneous Coefficients and Source Terms
Authors: Jenny Patrick , Lunati Ivan 
Published: January 2007

AbstractSimulation of sub‐surface flow in geologically complex formations is just one example in computational science, where efficient and accurate solutions of heterogeneous elliptic problems are of great interest. Often it is not feasible to resolve the whole range of relevant length scales associated with the spatial distribution of the highly varying coefficients. The MSFV method was originally developed for multi‐phase flow in porous media. In the more general form presented here, it can be applied for solving large elliptic problems in various areas of computational science. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Curl bounds Grad on SO(3)
Authors: Neff P. , Münch I. 
Published: January 2007

AbstractLet Fp ∈ GL(3) be the plastic deformation from the multiplicative decomposition in elasto‐plasticity. We show that the geometric dislocation density tensor of Gurtin in the form Curl[Fp] · (Fp)T applied to rotations controls the gradient in the sense that pointwise
equation image
This result complements rigidity results (John, Reshetnyak, Friesecke/James/Müller) as well as an associated linearized theorem saying that
equation image
Homogenization Results for Enzymatic Dispersion Processes
Authors: Timofte Claudia 
Published: January 2007

AbstractThe aim of this paper is to study the asymptotic behavior of the solution of a nonlinear problem arising in the modelling of enzyme catalyzed reactions through perforated media. The effective behavior of the solution of such a problem is governed by a new elliptic boundary‐value problem that captures the effect of the enzymatic reactions. The approach we use is the energy method of L. Tartar [4], coupled with monotonicity methods and results from the theory of semilinear problems [2]. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
3D FEA of Size Effects in Deformation of Thin Metallic Films
Authors: Trondl Andreas , Gross Dietmar , Mishnaevsky Leon , Huber Norbert 
Published: January 2007

AbstractThe purpose of this work is to analyze size effects in the deformation occurring during nanoindentation‐tests of thin metallic films on ceramic substrates. It is well known that classical phenomenological theories of plasticity are hardly applicable in cases of very small dimensions of a body [1]. Thus, the dependency of the mechanical behavior of thin films on the thickness can not be studied in the framework of classical theories. In order to simulate numerically the deformation, a specific material model has been chosen which is able to account for size effects. It bases on the theory of ”Mechanism Strain Gradient” (MSG) plasticity [2] in conjunction with the deformation theory of plasticity. The material model has been implemented via the user defined element subroutine (UEL) in the commercial FE code ABAQUS/Standard as a ten‐node tetrahedron‐element. With the developed subroutine the deformation of thin copper films on Si substrates during nanoindentation‐tests has been simulated. Different material models of the indentor (rigid and elastic) as well as different friction conditions between the film and the pyramidal indentor were tested. Furthermore, the influence of an additional oxide layer on the films surface has been analysed. In order to verify the numerical investigations, results from nanoindentation experiments have been used for comparison [4]. The FE simulations for different thicknesses in the range of 100‐600nm showed a very good agreement with the experiments. In particular, the size dependency of the force‐displacement curves, calculated by using the developed subroutine, is in rather good agreement with experiments. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
An Approach to Model Partially Premixed Turbulent Combustion withProbability Density Function (PDF) Methods
Authors: Hegetschweiler Michael , Jenny Patrick 
Published: January 2007

AbstractIn turbulent combustion one distinguishes between premixed, non‐premixed and partially premixed combustion. While laminar flamelet models proved to be extremely valuable for a wide range of non‐premixed flame simulations, similar approaches are more problematic in the partially premixed regime. Here the laminar flamelet concept for non‐premixed turbulent combustion simulations is generalized for the partially premixed regime. Similar as in the unsteady flamelet approach, the joint statistics of a progress variable, mixture fraction and scalar dissipation rate is used to obtain the joint statistics of the compositions from pre‐computed flame tables. The required distribution is computed with a joint PDF method and the main differences between the new approach and previous ones, are the pre‐computed tables and the way the evolution of the progress variable is calculated. Instead of evolving 1D flamelets, steady 2D solutions of burning flamelets propagating into unburned mixtures with varying mixture fraction are considered. The location of a fluid particle in this 2D laminar flame is defined by its mixture fraction and a burning time, which are modeled for each computational particle used in the PDF method. Numerical experiments of a turbulent lifted diffusion flame and a premixed Bunsen flame demonstrate that this approach can be employed for a wide range of applications. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Exergetic aspects of high‐speed boundary layers
Authors: Jocksch A. , Kleiser L. 
Published: January 2007

AbstractExergy is an established concept for evaluating heat cycles. It quantifies the available work that can be extracted from a system. The extension of the classical definition to non‐uniform flow field properties is applied here to high‐speed boundary layers. The destruction of exergy is quantified by the corresponding loss thickness and is evaluated locally. Turbulent fluctuations in this approach are described by their turbulent exergy, which is a generalisation of the concept of turbulent kinetic energy for incompressible flow. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
LES of premixed turbulent combustion using the level set approach
Authors: Kurenkov Oleksiy , Oberlack Martin 
Published: January 2007

AbstractLES of premixed turbulent combustion is presented based on the level set approach. Level set method is a technique which is especially designed to deal with problems involving topological changes of interfaces, merging interface, singularities and formation of sharp cusps [8]. Our previous work [3] which was performed in RANS‐context contains the level set approach with reinitialization scheme of Sussman et al. [1]. For LES we have developed a completely new algorithm based on the Fast Marching method. It does not need the iterative reinitialization schemes, and, therefore, it quarantees more accurate solution and drastic speed‐up of the computation. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Parameterized Scalar Profile Mixing Model for Turbulent Combustion Simulations
Authors: Meyer D. W. , Jenny P. 
Published: January 2007

AbstractThe composition fields in turbulent reacting flows are affected by turbulent transport (macromixing), molecular diffusion (micromixing), and chemical reactions. In the joint velocity‐composition probability density function transport equation the highly non‐linear macromixing and chemical reaction terms appear in closed form. This is a considerable advantage over moment closure methods. Micromixing on the other hand requires modeling and especially for turbulent combustion accurate mixing models are crucial. Our approach to model the mixing of scalars, e.g. species mass fractions or temperature, is based on considering one‐dimensional parameterized scalar profiles (PSP). Here, an extension of the PSP mixing model to inhomogeneous flows is presented. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A Lagrangian Joint PDF Approach for Turbulent Premixed Combustion
Authors: Rembold Benjamin , Jenny Patrick 
Published: January 2007

AbstractA model for premixed turbulent combustion based on a joint velocity probability density function (PDF) method and a progress variable is presented. Compared with other methods employing progress variables, the advantage here is that turbulent mixing of the progress variable requires no modeling. Moreover, by applying scale separation, the Lagrangian framework allows to account for the embedded, quasi laminar flame structure in a very natural way. The numerical results presented here are based on a simple closure of the progress variable source term and it is demonstrated that the new modeling approach is robust and shows the correct qualitative behavior. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Numerical simulation of stirred liquid‐liquid systems
Authors: Schlauch Sonja 
Published: January 2007

AbstractThe numerical simulation of drop size distributions in stirred liquid‐liquid systems requires, on one hand, the simulation of the flow field in the stirred tank and, on the other hand, the calculation of the population dynamical processes. These processes, in the considered application coalescence and breakage, describe how the number and the sizes of the drops in the dispersed phase change with time.In the presented approach, the (Reynolds‐averaged) Navier‐Stokes equations (with k ‐ε turbulence model), describing the turbulent flow in the stirred tank, are solved with a CFD code and the population balance equation, accounting for coalescence and breakage of the drops, is simulated with a population balance solver. The coupling of the two solvers is realized as a oneway coupling, i. e. the results of the CFD simulation are used for the calculation of the population dynamical processes. We will explain how the coupling can be realized, motivate why this type of coupling was chosen, and present simulation results. However, we will also discuss arising problems and risks of simulator coupling. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)