bluuebunny/crossref_metadata_2025_split huggingface dataset:
Theoretical Features of the Radial Collisional Transport in Magnetoplasmas
Authors: Tessarotto M. 
Published: June 2007

AbstractA formulation of the problem of collisional transport in magnetoplasmas in non‐symmetric configurations is illustrated. General properties of the transport across a family of isobaric surfaces are discussed and it is found that only for symmetric configurations (e.g. with one ignorable coordinate) ambipolarity for the particle fluxes is automatically fulfilled, up to second order in the Larmor radius, for a quasi‐neutral plasma. Furthermore integral expressions for the fluxes are obtained in the case of a state of near thermodynamic equilibrium and a partial iterative method in terms of the drift Fokker ‐ Planck equation is discussed. Finally the limits of validity of the present model are investigated and a stochastic interpretation of the results in terms of the random‐walk model is pointed out.
Axisymmetric Flexure of Circular Sandwich Plate Including Transverse Shear in Facings
Authors: Gupta A. P. , Sharma K. P. 
Published: June 2007

AbstractAn approximate formulation is presented for the bending of an isotropic sandwich circular plate under transverse load taking into account shear forces in the core and facings. The equations are solved in terms of Bessel function and results are computed for axisymmetric bending, when the outer edge is clamped.
Einschlüsse und Trennung der Nullstellen von Exponentialtrinomen mit konstanten Koeffizienten
Authors: Boese G. 
Published: June 2007

AbstractEs werden Exponentialtrinome A exp (az) + B exp (bz) + C exp (cz) in der komplexen Variablen z mit komplexen konstanten Koeffizienten und Exponentenpunkten betrachtet. Alle ihre Nullstellen werden mehrfach eingeschlossen. Sind die Exponentenpunkte nicht kollinear, so können fast alle Nullstellen durch Kreisscheiben getrennt werden. Kenntnis der Nullstellen ist für die Lösungs‐ und Stabilitätstheorie zu Differenzengleichungen bedeutsam.
Polhode and Herpolhode Cones in a Generalized Hooke' Joint
Authors: Wittenburg J. , Roberson R. E. 
Published: June 2007

AbstractThe cross‐shaped central body in a Hooke' joint is a rigid body with a fixed point whose motion can be visualized as rolling motion without slipping of a body‐fixed polhode cone on a space‐fixed herpolhode cone. The shapes of the cones depend on two parameters, namely on the inclination angle α between the shafts connected by the joint and on the angle β between the cross axes. In a common Hooke' joint β equals π/2. It is shown that in this case the intersection of the herpolhode cone with a plane perpendicular to one shaft or the other is an ellipse and that the intersection of the polhode cone with a plane parallel to the plane of the cross axes is a curve described by the function x2 + x2y2 + y2 = tan2 α. For both cross sectional curves parameter representations x(ϕ), y(ϕ) as well as implicit representations f(x, y) = 0 are developed also for β ≠ π/2.
On the Theory of Compressible Fluids
Authors: May M. 
Published: June 2007

AbstractA non‐stationary, compressible flow through a bounded domain Ω C Rn (n ≧ 2) is treated. The flow is governed by an initial boundary‐value problem for the Navier‐Stokes equations. The existence and uniqueness of a solution of this nonlinear system is shown.
Numerical Solution of Multiparameter Eigenvalue Problems
Authors: Müller R. E. 
Published: June 2007

AbstractIn this paper we describe an algorithm for the computation of eigenvalue curves and corresponding eigenvectors of multiparameter eigenvalue problems. After input of an algebraic simple eigenvalue with eigenvector we use continuation methods to compute the eigenvalue curve starting from the given eigenvalue. We indicate algebraic bifurcation equations for the computation of branching algebraic simple eigenvalue curves. For numerical examples we treated several ordinary differential equations in mechanics with finite differences.
The Frictionless Contact of Cracked Elastic Bodies
Authors: Theocaris P. S. , Bardzokas Dem. 
Published: June 2007

AbstractIn this paper a method was developed for solving the general mixed boundary‐value problem in static elasticity by numerically integrating a system of singular integral equations describing the boundary conditions of the problem, as well as the single‐valuedness of the displacements. The method was adapted to the solution of frictionless contact problems, in the case when one of the contacted bodies contains a crack. The solution of the problem yields not only the stress distribution along the contact zone but also the stress intensity factors at the tips of the crack, as well as the unknown contact length in cases of the praxis, where the contact zone is not assumed infinitesimal. The method was applied with success to the inclusion problem of an infinite cracked plate.
Mathematische Begründung von Verfahren zur Berechnung von Form und Zugkraft in Fadenzugsystemen
Authors: Hackmann W. 
Published: June 2007

AbstractDiese Arbeit beschäftigt sich mit der Berechnung von Form und Zugkraft in Fadenzugsystemen, die in einer zähen Flüssigkeit gleichförmig bewegt werden. Hergeleitet werden zwei Möglichkeiten der Modellierung. Modell 1: Aufstellung eines Systems von gewöhnlichen Differentialgleichungen 1. Ordnung für Form und Zugkraft; Modell 2: Ermittlung eines Systems von Integralgleichungen für die Zugkraft. Weiter werden hinreichende Bedingungen angegeben zur Lösung von Modell 2 mittels der sukzessiven Approximation. Diskretisiert man Modell 2 auf der Grundlage der gemittelten Euler‐Formel und löst man das dadurch entstehende System ebenfalls durch sukzessive Approximation, so gelten weitgehend analoge hinreichende Bedingungen. Es werden Fehlerabschätzungen vom Typ O(h2) angegeben zur näherungsweisen Lösung von Modell 2 mittels des diskretisierten Systems. Schließlich werden Ergebnisse zur Anwendbarkeit des Newton‐Verfahrens auf das diskretisierte System hergeleitet.
Eine RKT‐Formel für Differentialgleichungen der Form ẍ = f(t, x)
Authors: Fehlberg E. 
Published: June 2007

AbstractFür Differentialgleichungen der Form ẍ = f(t,x) werden RKT‐Formeln (m + 5)‐ter und (m + 6)‐ter Ordnung in x und (m + 6)‐ter Ordnung in x hergeleitet. Die Formeln gestatten eine Schrittweiten‐Kontrolle in x. Sie erfordern fünf Auswertungen und m totale Differentiationen der Differentialgleichungen pro Schritt. Die Fehlerkoeffizienten der Formeln werden mit denen einer Formel von Helsaker verglichen.
A Twelvth Order Theory of Transverse Bending of Transversely Isotropic Plates
Authors: Reissner E. 
Published: June 2007

AbstractMotivated by the problem of the differences between stress and stress couple concentration factors for transverse bending of plates with small circular holes we use a variational method for the derivation of a twelfth order two‐dimensional theory of transversely isotropic plates, which includes the known sixth order theory of sheardeformable plates as a special case via constitutive‐coefficient specialization. It is further shown that the twelvth order system may be reduced in a non‐obvious way to two simultaneous second order and two simultaneous fourth order Laplace operator equations, with this then making it possible to obtain closed form solutions for polar coordinate boundary value problems.
Some Oscillation Theory
Authors: Leighton W. 
Published: June 2007

AbstractIn the first section of this paper we extend an interesting result due to Nehari and develop some related ideas. The remainder of the paper has principally to do with sufficient conditions for oscillation of solutions of differential equations of the form y'' + p(x) y = 0, where p(x) is at least piecewise continuous on I: (a, ∞) and changes sign infinitely often in I. In the last section, however, some earlier results of the author on focal and σ‐points are extended.
On Finite Element Upwinding and its Numerical Performance in Simulating Coupled Convective Transport Processes
Authors: Diersch H.‐J. 
Published: June 2007

AbstractVerschiedene Finite‐Element‐Upwind‐Methoden werden beschrieben und hinsichtlich Stabilität und Genauigkeit für stationäre Transport probleme diskutiert. Die numerischen Eigenschaften von optimalen Upwind‐Formulierungen sowie Schemata höherer Ordnung und weiteren Modifikationen werden unter Verwendung von bilinearen und biquadratischen Elementen für gekoppelte, durch Auftriebskräfte hervorgerufene Rezirkulationsströmungen in porösen Medien untersucht. Im Gegensatz zur bilinearen Upwind‐Form offenbaren Upwind‐Schemata, beruhend auf biquadratischen Elementen, Störanfälligkeiten bei der nichtlinearen Aufgabenstellung und führen auf Genauigkeits‐ und Stabilitätsprobleme bei zunehmender Rayleigh‐Zahl. Die erhaltenen numerischen Ergebnisse werden mit bisherigen Lösungen verglichen.
Expansion von Polynomen und Polynommatrizen
Authors: Falk S. 
Published: June 2007

AbstractMit Hilfe der Lagrangeschen Polynome wird eine gegebene Polynommatrix expandiert mit dem Ziel, die etwa vorhandene Diagonaldominanz zu erhalten. Eine besondere Anwendung findet diese Methode in der Theorie der gedämpften linearen Schwingungen mit endlich vielen Freiheitsgraden.
On Difference and Shooting Methods for Boundary Value Problems in Differential‐Algebraic Equations
Authors: März R. 
Published: June 2007

AbstractIsolatedly solvable boundary value problems are formulated for implicit nonlinear differential‐algebraic equations which can be partitioned into coupled non‐singular differential equations and finite‐dimensional equations. Then, for solving these problems by shooting methods, the behaviour of the shooting equations is investigated. The null‐space of the Jacobian of the shooting mapping is constant in a neighbourhood of the solution. Newton methods are applicable for shooting. Further, the convergence of some general difference methods for boundary problems in differential‐algebraic equations is proved. Especially, it is shown that the trapezoidal rule and the centered Euler method which are applied to the differential‐algebraic equation directly, become instable.
Natural Damped Frequencies of an Infinitely Long Column of Immiscible Viscous Liquids
Authors: Bauer H. F. 
Published: June 2007

AbstractThe determination of the damped natural frequencies of an infinitely long liquid column consisting of immiscible viscous liquids has been performed for various systems such as a single liquid column, two immiscible liquids in a rigid container, having an interfacial surface, a liquid around a rigid cylindrical center core, as well as two immiscible liquids with free liquid surface and interfacial surface. The frequency equation for the damped and coupled natural frequencies yields a complex determinant, from which the complex frequency has to be determined. It was noticed that besides the damped oscillatory root, which corresponds for vanishing viscosity to the undamped frequency of the frictionless liquid system, additional decayroots appear. Only the simple viscous infinite liquid column the frequency equation has been evaluated numerically. It could be shown that viscosity decreases the instability region for the axisymmetric (m = 0) case, and that this region depends upon the surface tension parameter.
Brief report: Coping among Austrian children and adolescents
Authors: Hampel Petra 
Published: June 2007

ABSTRACTThe study investigated age and gender effects on coping with common stressors among 494 Austrian children and adolescents (age 8–14 years). Participants were subdivided into subgroups of late children comprising third and fourth graders, early adolescents consisting of fifth and sixth graders, and middle adolescents including seventh graders. Middle adolescents showed a maladaptive coping pattern with decreased problem and emotion‐focused coping strategies and increased passive avoidance and aggression. Females scored higher on social support and also on the maladaptive coping strategy rumination. Female middle adolescents reported higher resignation than their male contemporaries and female children. Results suggest the application of primary preventive stress management programs in late childhood and early adolescence.
Corruption and the Disparty in Levels of Political Support by Winners and Losers
Authors: Herreros Francisco , Criado Henar 
Published: June 2007

Abstract.Recent analyses of the determinants of levels of political support have stressed the role of institutions in producing the disparity in support by the winners and losers of an election. The authors claim that it is not only the countries' institutional structures that matter in determining this disparity but also how the institutions work. Specifically, they claim that the disparity between winners and losers is greater in countries with a high level of political corruption. They test this hypothesis in a cross-national sample from the European Social Survey Database.Résumé.Des analyses récentes des déterminants de l'appui politique ont souligné le rôle des institutions dans la dynamique de l'écart entre l'appui politique accordé aux vainqueurs et aux perdants d'une élection. Les auteurs avancent que la structure institutionelle du pays n'est pas l'unique variable d'importance pour expliquer l'écart entre vainqueurs et perdants, mais que le fonctionnement des institutions est aussi un facteur déterminant. Ils soutiennent plus précisément que l'écart entre vainqueurs et perdants sera plus grand dans les pays où la corruption est fortement ancrée dans les milieux politiques. Ils vérifient leur hypothèse à l'aide d'un échantillon de la base de données de l'enquête sociale européenne (European Social Survey).
Protecting Endangered Species in the US and Canada: The Role of Negative Lesson Drawing
Authors: Illical Mary , Harrison Kathryn 
Published: June 2007

Abstract.Although the US and Canada share ecosystems, with many species ranging freely across the border, the two countries have taken very different approaches to protecting endangered species. The USEndangered Species Act, adopted in 1973, relies primarily on regulation, thus imposing the costs of protecting biodiversity on the private sector. In contrast, Canada'sSpecies at Risk Act, adopted in 2002, relies primarily on public expenditures to support stewardship programs. We argue that this difference is best explained by negative lesson drawing from the US experience. In particular, awareness of the costs of species protection in the US led Canadian business to present stronger opposition to regulation than had their American counterparts decades earlier. We use the case of the CanadianSpecies at Risk Actto theorize about conditions under which negative lesson drawing is likely to be most influential.Résumé.Bien que les États-Unis et le Canada partagent les mêmes écosystèmes, les deux pays ont adopté des approches très différentes en matière de protection des espèces en péril. La Loi américaine sur les espèces en péril (US Endangered Species Act), adoptée en 1973, porte essentiellement sur la régulation, et de ce fait impose les coûts de la protection de la biodiversité au secteur privé. En revanche, la Loi canadienne sur les espèces en péril, adoptée en 2002, fait principalement retomber les coûts des programmes de gestion au secteur public. Nous démontrons que cette différence s'explique principalement par le rôle des leçons négatives apprises de l'expérience des États-Unis. La prise de conscience des coûts liés à la protection des espèces en péril aux États-Unis a notamment amené les milieux d'affaires canadiens à présenter une plus forte opposition à la régulation que leurs homologues américains l'avaient fait des années plus tôt. En s'appuyant sur le cas de la Loi canadienne sur les espèces en péril, nous visons à théoriser les conditions selon lesquelles l'acquisition de connaissance par leçons négatives (“ negative lesson drawing ”) est susceptible d'être le plus concluant.
Les pratiques sociales dans les régimes politiques africains en voie de démocratisation : hypothèses théoriques et empiriques sur la paraconstitution
Authors: Sindjoun Luc 
Published: June 2007

Résumé.La mobilisation de différents courants du néo-institutionnalisme permet de comprendre la destinée politique et sociale des institutions étatiques en Afrique. Les institutionnalismes historique et du choix rationnel, placés sous les auspices de l'institutionnalisme sociologique rendent possible le dépassement des institutions formelles et des constitutions rigides au profit des normes et valeurs parallèles influençant effectivement le comportement des acteurs. C'est la “ paraconstitution ” tant ces normes et valeurs ont une centralité réelle dans le vécu socio-politique. En tant qu'elle est une donnée constante, la “ paraconstitution ” est une importante catégorie d'analyse des processus de démocratisation en Afrique.Abstract.The mobilization of different currents of neo-institutionalism is helpful in understanding the social and political destiny of power institutions in Africa. When placed under the umbrella of sociological institutionalism, others institutionalisms such as rational choice institutionalism and historical institutionalism can go beyond formal institutions and rigid constitutions. The notion of “paraconstitution” is suggested hereby in a generic perspective for the understanding of concrete or parallel norms and values that effectively shape the behaviour of political actors. Sociological institutionalism permits the apprehension of dynamic interactions between political practises and culture in Africa without falling into the trap of culturalism.
Ruling Canada: Corporate Cohesion and Democracy
Authors: Albo Gregory 
Published: June 2007

Ruling Canada: Corporate Cohesion and Democracy, Jamie
Brownlee, Halifax: Fernwood Books, 2005, pp. 168.For a discipline explicitly engaged in the study of power,
particularly as exercised in liberal democracies, it is striking how
little Canadian political science has actually done to examine the
concentration of private economic power, the political organization of the
business classes and the extension of that power into the political realm.
Indeed, Canadian political science has been principally preoccupied with
power insofar as it pertains to the constitutional distribution of power
and the relative access to political power of the multinational and
multicultural constituent groups comprising Canada. The enormous
concentration of economic power—the top 25 firms accounting for over
40 per cent of business assets and the monopolies with over $100 million
in revenue accounting for 80 percent of business assets (p. 31)—has
largely been occluded from serious scrutiny. The mythologies of a
pluralist Canadian democracy are better preserved in the absence of
conceptual and empirical debate about the economic foundations of
political power.
State Feminism and Political Representation
Authors: Harder Lois 
Published: June 2007

State Feminism and Political Representation, Joni Lovenduski,
ed., Cambridge: Cambridge University Press, 2005, pp. xix, 315.Lovenduski's edited volume is an 11-country (10 western European
countries and the US), analysis of the effects of women's policy
agencies on efforts to increase the representation of women in the
political process—in legislatures, on party lists and in public
administration. The book is the product of a 10-year collaboration among
scholars involved in the Research Network on Gender Politics and the State
and it exhibits the rich rewards that such a lengthy and involved
affiliation among like-minded scholars can produce.
Marginal Man: The Dark Vision of Harold Innis
Authors: Martin Geoff 
Published: June 2007

Marginal Man: The Dark Vision of Harold Innis, Alexander John
Watson, Toronto: University of Toronto Press, 2006, cloth, $65.00, pp. xi,
525.In the study of Canadian political thought, a young doctoral student
wrote, and defended in 1981, an excellent PhD dissertation on Harold
Innis. Unlike many works, it was based as much on an exhaustive
examination of Harold Innis' papers as it was on Innis'
published works. Unfortunately, A. John Watson did not continue in
academia and his work was ultimately accessible only to the committed
Innis specialist, willing to visit the U of T's Robarts Library or
consult microfilm. After half a career as CEO of Care Canada, the
international relief organization, Alexander John Watson has revised and
published this work, making it accessible to a much broader audience.
Territory, Authority, Rights: From Medieval to Global
Assemblages
Authors: Policzer Pablo 
Published: June 2007

Territory, Authority, Rights: From Medieval to Global
Assemblages, Saskia Sassen, Princeton NJ: Princeton University Press,
2006, pp. xiv, 493.How to make sense of globalization? Saskia Sassen's attempt, in
Territory, Authority, Rights (TAR), is like globalization itself:
vast, sweeping and forceful, but maddeningly hard to grasp. At best, we
are dazzled and sure we're on to something important. At worst,
it's difficult to say what exactly this is. At times, we fear
we've been had.
Governance in Contemporary Germany: The Semisovereign State
Revisited
Authors: Stiller Sabina 
Published: June 2007

Governance in Contemporary Germany: The Semisovereign State
Revisited, Simon Green and William E. Paterson, eds., Cambridge:
Cambridge University Press, 2005, pp. 338.Nearly twenty years after Katzenstein's diagnosis of the German
polity as “semisovereign state,” this volume re-evaluates
unified Germany in the light of the original study. It starts with a
concise introduction by the editors to the original argument and to the
challenges of unification to semisovereign governance. Then, eleven
contributions cover Katzenstein's “policy nodes”
(political parties, federalism, and parapublic institutions), developments
in previously covered policy areas (economic and social policy, industrial
relations, immigration, administrative reform) and two additional ones:
the environment and EU integration. The volume is concluded by Katzenstein
himself, arguing that despite many political and socio-economic changes,
semisovereignty still reigns in Germany.
Leo Strauss and the Theologico-Political Problem
Authors: Lampert Laurence 
Published: June 2007

Leo Strauss and the Theologico-Political Problem, Heinrich
Meier, New York: Cambridge University Press, 2006, pp. xxii, 183.One of the debates accompanying the reception of Leo Strauss's
lifework as it grows into an inescapable force in political philosophy has
been this: Where does Strauss really stand on the relation between reason
and revelation? Heinrich Meier's new book ends that debate.
Obesity and Metabolic Syndrome in a Psychiatric Rehabilitation Service
Authors: Tirupati Srinivasan , Chua Ling-Ern 
Published: June 2007

Objective: People with schizophrenia and bipolar disorders suffer from increased rates of obesity and metabolic syndrome. Metabolic disorders add to the burden of disease and affect treatment and rehabilitation outcomes. This study aimed to study the prevalence of obesity and metabolic syndrome in people with chronic psychotic disorders in a psychiatric rehabilitation setting. Method: All patients in the psychiatry rehabilitation program were assessed for obesity and metabolic syndrome using the definition of International Diabetes Federation (2005) was conducted as part of clinical protocol recently introduced into practice. Results: A total of 221 patients were assessed. The prevalence of obesity was 59% and metabolic syndrome 68%. Metabolic syndrome was more frequent in patients receiving polypharmacy with multiple antipsychotics and mood stabilisers. Rates of nontreatment for metabolic disorders ranged from 30% to 88%. Conclusions: The rates of obesity and metabolic syndrome in patients with chronic severe mental disorders on antipsychotic drug treatment were 2 to 3 times that in the general population. A majority of them were untreated. Detection, monitoring and appropriate treatment of obesity and metabolic disorders should be a component of an assertive care management program to reduce morbidity and mortality and improve rehabilitation outcomes.