bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mineralogy and micromorphology of İznik ceramics
Authors: Kapur S. , Sakarya N. , Fitzpatrick E. A. , Pagliai M. , Kelling G. , Akça E. , Karaman C. , Sakarya B. 
Published: January 2007

AbstractThe study of İznik ceramics of different periods revealed that temperatures of about 800–900°C were produced during firing. Glass fragments added to the body for strengthening resulted in the formation of fibrous minerals as clusters in the pores and protruding in the glaze together with Ca and P rich minerals in the raw materials used. The pore size distribution of the pores indicates a uniform temperature rise and fall during the production of the microstructure.
Organization of the pallium in the fire‐bellied toad Bombina orientalis. I: Morphology and axonal projection pattern of neurons revealed by intracellular biocytin labeling
Authors: Roth Gerhard , Laberge Frédéric , Mühlenbrock‐Lenter Sabine , Grunwald Wolfgang 
Published: January 2007

AbstractThe cytoarchitecture and axonal projection pattern of pallial areas was studied in the fire‐bellied toad Bombina orientalis by intracellular injection of biocytin into a total of 326 neurons forming 204 clusters. Five pallial regions were identified, differing in morphology and projection pattern of neurons. The rostral pallium receiving the bulk of dorsal thalamic afferents has reciprocal connections with all other pallial areas and projects to the septum, nucleus accumbens, and anterior dorsal striatum. The medial pallium projects bilaterally to the medial pallium, septum, nucleus accumbens, mediocentral amygdala, and hypothalamus and ipsilaterally to the rostral, dorsal, and lateral pallium. The ventral part of the medial pallium is distinguished by efferents to the eminentia thalami and the absence of contralateral projections. The dorsal pallium has only ipsilateral projections running to the rostral, medial, and lateral pallium; septum; nucleus accumbens; and eminentia thalami. The lateral pallium has ipsilateral projections to the olfactory bulbs and to the rostral, medial, dorsal, and ventral pallium. The ventral pallium including the striatopallial transition area (SPTA) has ipsilateral projections to the olfactory bulbs, rostral and lateral pallium, dorsal striatopallidum, vomeronasal amygdala, and hypothalamus. The medial pallium can be tentatively homologized with the mammalian hippocampal formation, the dorsal pallium with allocortical areas, the lateral pallium rostrally with the piriform and caudally with the entorhinal cortex, the ventral pallium with the accessory olfactory amygdala. The rostral pallium, with its projections to the dorsal and ventral striatopallidum, resembles the mammalian frontal cortex. J. Comp. Neurol. 501:443–464, 2007. © 2007 Wiley‐Liss, Inc.
The distribution of the gondwanine ostracodRostrocytherideaDingle: palaeozoogeographical implications
Authors: Ballent Sara C. , Whatley Robin 
Published: January 2007

AbstractThe genusRostrocytherideais strictly gondwanine in its distribution and, in Argentina, is shown to be restricted to Patagonia. Of the six recorded Argentinian species, five are restricted to the southern part of South America:Rostrocytheridea opisthorhynchusnov. sp. (late Tithonian‐Berriasian),Rostrocytherideasp. (Valanginian),Rostrocytheridea cerasmodermanov. sp.,Rostrocytheridea covuncoensisMusacchio (Hauterivian) andRostrocytheridea? sp. (Campanian). One species,Rostrocytheridea ornataBrenner and Oertli, is of much wider distribution, occurring in the Neocomian of South Africa and the Hauterivian of central‐west Argentina. In Australia, the genus first appears in the Albian‐Cenomanian and ranges up to the Santonian with two species:Rostrocytheridea canaliculataBate andRostrocytheridea westraliensis(Chapman). The youngest record of the genus isR. hamiltonensisFauth and Seeling from the Middle to Upper Campanian of the James Ross Basin, Antarctic Peninsula. The implications for intercontinental correlation and the reconstruction of palaeo‐migration routes are considered. Copyright © 2007 John Wiley & Sons, Ltd.
Bladder sensitivity testing using a visual analogue scale: comparative cystometric study on women
Authors: Dompeyre Philippe , Fritel Xavier , Bader Georges , Delmas Vincent , Fauconnier Arnaud 
Published: January 2007

AbstractAimsTo obtain improved assessment of bladder sensitivity during cystometry by using a 10 cm visual analogue scale (VAS), and comparing it with the standard method according to the International Continence Society (ICS).MethodsTwenty‐five patients with presumed normal bladder functioning underwent filling cystometries according to the VAS‐based method and to the standard method. The order of the cystometries was set by randomization. The relationships between the bladder sensation using the VAS‐based method and the volume of bladder perfusion were analyzed graphically. Various parameters were abstracted and compared to those obtained by the standard method. Correlations were searched for by principal component analysis.ResultsAll the curves showed continuous progression of the desire to void. Eighteen of the 25 curves (72%) had a characteristic appearance, showing a latency phase with no perception of any bladder sensation, then a second phase with linear increase of the desire to void. The latency phase corresponded to the first sensation of bladder filling (226.3 ml ± 169.1 vs. 200.0 ml ± 143.1, r = 0.9). The progression in desire measured by the VAS method culminated in a sensation of maximum tolerable desire to void, which corresponded to the maximum cystometric capacity (MCC; 497.3 ± 191.2 vs. 517.4 ± 196.7, r = 0.9). The slope of the linear regression line for the desire to void constitutes an independent parameter.ConclusionsVAS reveals that the distinct sensations with the standard method are in fact a single sensation of a desire to void that increases continually during filling. Neurourol. Urodynam. 26:350–355, 2007. © 2007 Wiley‐Liss, Inc.
Wave Dispersion Decoupling in Micropolar Thermoelasticity
Authors: Dobovšek Igor 
Published: January 2007

AbstractFor a system of field equations of micropolar thermoelasticity we derive a propagation condition for thermoelastic disturbance in a form of monochromatic plane wave in deformation, micro rotation and temperature. The corresponding dispersion relation is given in an explicit form, together with dependence of characteristic coefficients on principal material constants forming the constitutive tensor of isothermal macro and micro elasticity, phenomenological heat conductivity and coupled macroscopic thermoelasticity. It is shown that due to the centro–symmetric nature of microelasticity and particular form of temperature coupling in a free energy function, the separation between the optical and acoustical branch of dispersion relation is inherent. For such systems dispersion relations due to the micropolar fields on one side and macroscopic thermoelastic fields on the other side are completely independent without any cross–coupling. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Necessary stability conditions for differential‐difference equations
Authors: Batra Prashant 
Published: January 2007

AbstractHurwitz‐stable polynomials and quasi‐polynomials are split to construct positive rational functions. Computational characterizations of positive functions are used to derive low‐order necessary stability criteria. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Global Solutions of Nonlinear Problem in Hilbert Space
Authors: Marko Lubomir 
Published: January 2007

AbstractWe deal with the local and global existence of solutions and solutions multiplicity for nonlinear problem u – λLu + N (u) = 0 in a real Hilbert space H, with linear operator L and nonlinear operator N, defined on a Hilbert space H, in dependence on a parameter λ ∈ R. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Existence of Solutions to the Linearized Spinning Wheel Problem
Authors: Ricker Sarah , Menzel Andreas , Steinmann Paul 
Published: January 2007

AbstractSpinning wheels, or rather steady rolling cylinder‐like deformable bodies occur in many mechanical (contact) problems, e.g. car‐ or aircraft‐tires, gears or grinding processes. In order to avoid transient calculation for such problems and in order to obtain a steady‐state formulation we make use of a model – advocated by Oden and Lin in [1] and further elaborated by Govindjee andMihalic in [2] – based on a spinning reference coordinate system. After developing the kinematics and deriving the weak formulation we will show the existence of a weak solution for the linearized spinning wheel problem by applying the Lax Milgram Lemma. The presented contribution will be concluded by some numerical examples. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Breaking the Symmetry in a Car‐Following Model
Authors: Seidel Tilman , Werner Bodo 
Published: January 2007

AbstractA wide class of microscopic car‐following traffic models deals with a system of ODEs describing N cars driving on a circular highway. The symmetry of the road naturally leads to (quasi‐)stationary solutions and to an analysis of their stability. Breaking this symmetry with small perturbations we show the existence of a branch of some special solutions that occur instead of the stationary points.Those solutions can be interpreted in reality, they describe the behavior of the cars on the road as expected. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Asymptotic mean‐square stability of linear multi‐step methods for SODEs
Authors: Buckwar Evelyn , Winkler Renate 
Published: January 2007

AbstractIn this article we present results of a linear stability analysis of stochastic linear multi‐step methods for stochastic ordinary differential equations. As in deterministic numerical analysis we use a linear time‐invariant test equation and study when the numerical approximation shares asymptotic properties in the mean‐square sense of the exact solution of that test equation. Sufficient conditions for asymptotic mean‐square stability of stochastic linear two‐step‐Maruyama methods are obtained with the aide of Lyapunov‐type functionals. In particular we study the asymptotic mean‐square stability of stochastic counterparts of two‐step Adams‐Bashforth‐ and Adams‐Moulton‐methods and the BDF method. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
The random environment of offshore systems
Authors: Ellermann Katrin 
Published: January 2007

AbstractThe analysis of the dynamical behavior of systems in ocean waves is an important part in offshore engineering. While a characterization of the response of a linearized model can be obtained in frequency domain, it has to be noted that offshore systems usually include components with nonlinear behavior. The systematic analysis of the nonlinear dynamics of floating structures is often facilitated by additional assumptions. One common example is the use of deterministic (harmonic) waves. Even though periodic waves may be a reasonable simplification for many applications, sea waves in general are usually better described by a spectral or probabilistic approach. This paper addresses different methods of describing random forces for the analysis of floating structures. Examples show the effects of different wave models on the analysis of a simple floating structure. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Dynamics of an Infinite Beam under Stochastic Moving Forces
Authors: Rystwej A. 
Published: January 2007

AbstractThe problem regarding the dynamic response of an infinite beam resting on two‐parametric foundation to the passage of a train of random forces is studied. This train of forces idealizes the flow of vehicles having random weights and travelling at the same speed. It is assumed that the occurrence process is either a Poisson or a renewal (Erlang) process. Two different situations and solutions are presented: one for the arbitrary locations of the forces and another when one of the forces is located in such a way that the response of the beam has the maximal value. The first model can be used to estimate the reliability of the beam with respect to fatigue, the second model can be useful in the reliability with respect to the maximal response. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A Generalization of Pascal's Triangle Using Powers of Base Numbers
Authors: Kallós Gábor 
Published: January 2007

AbstractIn this paper we generalize the Pascal triangle and examine the connections among the generalized triangles and powering integers respectively polynomials. We emphasize connections with the binomial and multinomial theorems, and finally we present some computational results. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Hybrid Algorithms in Image Reconstruction
Authors: Băutu Andrei , Băutu Elena , Popa Constantin 
Published: January 2007

AbstractWe consider in this paper a combination between the evolutionary algorithm Particle Swarm Optimization (PSO), and the ART Kaczmarz procedure. For the new hybrid algorithm so obtained some results ilustrating its efficiency are presented for consistent least‐squares formulation of an image reconstruction problem. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Interpolating Wavelets applied to the Navier‐Stokes equations
Authors: Faustino Nelson 
Published: January 2007

AbstractWe propose a Wavelet‐Galerkin scheme for the stationary Navier‐Stokes equations based on the application of interpolating wavelets. To overcome the problems of nonlinearity, we apply the machinery of interpolating wavelets presented in [2] in order to obtain problem‐adapted quadrature rules. Finally, we apply Newton's method to approximate the solution in the given ansatz space, using as inner solver a steepest descendent scheme. To obtain approximations of a higher accuracy, we apply our scheme in a multi‐scale context. Special emphasize will be given for the convergence of the scheme and wavelet preconditioning. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A Mathematical Model of Water Pollution Control Using the Finite Element Method
Authors: Pochai Nopparat , Tangmanee Suwon , Crane L. J. , Miller J. J. H. 
Published: January 2007

AbstractWater pollution assessment problems arise frequently in environmental science. In this research, the finite element method for solving the one‐dimensional steady convection‐diffusion equation with constant coefficients is presented; it is then used to optimize water treatment costs. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Mathematical Modelling of Atmospheric Flow over a Shelter‐belt
Authors: Sládek I. , Kozel K. , Jaňour Z. 
Published: January 2007

AbstractThe paper presents a mathematical and numerical study of the flow with pollution dispersion in the atmospheric boundary layer (ABL) over a simplified topography with a shelter‐belt placed before the pollutant (coal dust) source. The flow is supposed to be viscous, incompressible, turbulent and stationary. A two different numerical models are briefly mentioned. The shelter‐belt is supposed to be a solid and impermeable obstacle significantly changing the flow‐field and hence it gives the possibility of influencing the level of the pollutant concentrations in the downstream region. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A finite element method for two–parameter singularly perturbed problems in 2D
Authors: Teofanov Ljiljana , Roos Hans‐Görg , Zarin Helena 
Published: January 2007

AbstractWe consider a singularly perturbed elliptic problem with two small parameters posed on the unit square. Based on a decomposition of the solution, we prove uniform convergence of a finite element method in an energy norm. The method uses piecewise bilinear functions on a layer‐adapted Shishkin mesh. Numerical results confirm our theoretical analysis. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Numerical Treatment of Second Order Differential‐Algebraic Systems
Authors: Wunderlich Lena 
Published: January 2007

AbstractWe consider the numerical treatment of systems of second order differential‐algebraic equations (DAEs). The classical approach of transforming a second order system to first order by introducing new variables can lead to difficulties such as an increase in the index or the loss of structure. We show how we can compute an equivalent strangeness‐free second order system using the derivative array approach and we present Runge‐Kutta methods for the direct numerical solution of second order DAEs. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Control of Crystallization Processes
Authors: Götz Thomas , Pinnau Rene , Struckmeier Jens 
Published: January 2007

AbstractIn this paper an optimal control problem for polymer crystallization is investigated. The crystallization is described by a non–isothermal Avrami–Kolmogorov model. The boundary temperature serves as control variable. The cost functional takes the spatial variation of the crystallinity and the final degree of crystallization into account. The resulting boundary control problem for a parabolic equation coupled with two ordinary differential equations is treated by an adjoint variable approach. Numerical simulations are carried out for different scenarios to illustrate the applicability and performance of the optimization algorithm. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Trajectory Design using Differential Parameterizations
Authors: Antritter Felix , Deutscher Joachim 
Published: January 2007

AbstractA trajectory for the position of an underactuated ship is considered which leads to singularities when using exact input‐output linearization. This paper shows that on the basis of a differential parameterization with a non‐flat output, such singularities can be avioded using a reparameterization of the trajectory. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A Model Predictive Control Algorithm Applied To Non‐Linear Processes
Authors: Balan Radu , Maties Vistrian , Hancu Olimpiu , Stan Sergiu 
Published: January 2007

AbstractModel predictive control (MPC) is an optimization‐based approach that has been successfully applied to a wide variety of control problems. In most of nonlinear strategies, the controllers are based on linear models with fixed parameters so that the vast body of linear control theory can be applied. Other solutions include the use of a nonlinear analytical model, combinations of linear empirical models, etc. This paper presents an MPC algorithm which uses on‐line simulation and rule‐based control. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
The Immune Response as an Optimal Control Problem with Time‐Delays
Authors: Poppe Lisa Katrin 
Published: January 2007

AbstractThe treatment of a pathogenic disease process can be modeled as an optimal control problem with time‐delays in several state variables. The resulting system describes the innate immune response and consists of both ordinary differential equations and delay differential equations, where the delay is constant but disease specific. In this paper the numerical treatment and the optimal solution are discussed. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Geometric Analysis of Hamiltonian Mechanics using Connections
Authors: Schöberl Markus , Schlacher Kurt 
Published: January 2007

AbstractThis contribution tries to clarify the role of connections in mechanics. From a geometric point of view connections appear naturally in an intrinsic description of mechanics, such that the equations remain their structure, even though time dependent transformations are applied. The choice of connections is of course not unique and physical considerations are essential for the proper selection. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
State Dependent AIMD Algorithms and Consensus Problems
Authors: Wirth Fabian , Shorten Robert , Akar Mehmet 
Published: January 2007

AbstractThis papers analyses a class of nonlinear positive systems that model the dynamics of nonlinearadditive‐increase multiplicative‐decrease(AIMD) protocols. The system class covers a range of protocols that are currently used in real communication networks, such as standard TCP, and recent proposals for congestion control protocols such as Scalable TCP. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Dynamical stability of a viscoelastic bar
Authors: Wójcicki Zbigniew , Brza̧kała Aneta 
Published: January 2007

AbstractIn the paper the dynamic stability of a simply supported viscoelastic bar of the Zener material model is investigated. The bar is subjected to a parametric excitation of a periodic nature. The physical model of the system is of the continuous type. However, the proposed approach yields a transformation of the mathematical model from the partial differential equation to an ordinary one. Such a transformation is made possible by the use of an approximation function for the bending line of the bar. This way, the system is governed by a homogeneous, ordinary differential equation of the third order with periodic coefficients. For stability studies the Floquet theory is applied. A sensitivity analysis of a parametric periodic system is discussed, i.e. the influence of stiffness and damping coefficient of the Zener model on stability of the differential equation that describes the vibration of the viscoelastic bar. Furthermore the stabilization process of an unstable parametric system was realized. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Discretisation of stabilised inverse diffusion equations
Authors: Breuß Michael 
Published: January 2007

AbstractThe aim of the contribution is to give a theoretical discrete framework for the so‐called staircasing phenomenon arising in discretisations of stabilised inverse diffusion equations. After defining staircasing in a rigorous fashion, we show that staircasing arises systematically depending on given data. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Trapped slender vortex filaments in statistical equilibrium
Authors: Andersen Timothy , Lim Chjan 
Published: January 2007

AbstractSystems of nearly parallel, slender vortex filaments in which angular momentum is conserved are an important simplification of the Navier‐Stokes equations where turbulence can be studied in statistical equilibrium. We study the canonical Gibbs distribution based on the Klein‐Majda‐Damodaran (KMD) (Klein et al. [1995]) model and find a divergence in the mean square vortex position from that of the point vortex model of Onsager [1949] at high temperature. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Hysteresis of pulsed characteristics of field emission from nanocarbon materials
Authors: Arkhipov A. V. , Mishin M. V. , Parygin I. V. 
Published: January 2007

AbstractCharacteristics of pulsed‐field electron emission from nanocarbon films were investigated in experiments with a wide (1.5–5 mm) quasiplanar test gap. Parameters of the applied voltage (amplitude, shape and duration of pulsed component and d.c. bias) were varied; the maximum peak voltage value amounted to 40–45 kV. Dynamic I–V plots measured in 10–100 µs pulses combined inherent features of field emission (linearity in Fowler–Nordheim (FN) coordinates) with strong hysteresis. For the explanation of the latter, a model of emission via intermediate electron energy states is proposed. The simple quantitative model excellently agrees with the measured characteristics for different emitter samples and over a broad range of voltage parameters, but fails to simulate the phenomenon of emission efficiency boosting by fast voltage drops, also observed in the experiment. A possible mechanism of this dynamic effect may consist in the redistribution of electrons among the different field focuses at the nonuniform emitter surface under the effect of a strong nonstationary electric field. Copyright © 2007 John Wiley & Sons, Ltd.