Search results for "Stability."

Niepełnosprawność a jakość życia pacjentów ze stwardnieniem rozsianym : mediacyjna rola zapotrzebowania na wsparcie społeczne

2019

Multiple sclerosis (MS) is a progressive neurological disease that leads to significant disability and can affect health related quality of life. Social support may be one of the predictors of quality of life in MS. The aim of this study was to determine the relationship between disability associated with the course of multiple sclerosis, social support and quality of life. 137 people diagnosed with MS participated in the study. Extended Disability Status Scale (EDSS), Guy's Neurological Disability Scale (GNDS), Berlin Social Support Scales and the Multiple Sclerosis Impact Scale 29 (MSIS-29) were used in the study. The study showed no significant relationship between disability and perceiv…

Networks of knowledge among unionized firms

2008

We develop a model of strategic networks in order to analyze how trade unions will affect the stability of R&D networks through which knowledge is transmitted in an oligopolistic industry. Whenever firms settle wages, the partially connected network is likely to emerge in the long run if and only if knowledge spillovers are large enough. However, when unions settle wages, the complete network is the unique stable network. In other words, the stronger the union bargaining power is, the more symmetric stable R&D networks will be. In terms of network efficiency, the partially connected network (when firms settle wages) does not Pareto dominate the complete network (when unions settle wages) an…

Networks of manufacturers and retailers

2011

We study the endogenous formation of networks between manufacturers of differentiated goods and multi-product retailers who interact in a successive duopoly. Joint consent is needed to establish and/or maintain a costly link between a manufacturer and a retailer. We find that only three distribution networks are stable for particular values of the degree of product differentiation and link costs: (i) the non-exclusive distribution & non-exclusive dealing network in which both retailers distribute both products is stable for intermediate degree of product differentiation and small link costs; (ii) the exclusive distribution & exclusive dealing network in which each retailer distributes a dif…

Endogenous firm asymmetry and cooperative R&D in linear duopoly with spillovers

2005

In a linear model ofcost reducing R&D/Cournot competition, firm asymmetry is shown to be sustainable as subgame perfect Nash equilibrium with R&D competition only ifthe productivity of research is sufficiently large relative to the benefits from imitation. In such a case, industry-wide cost reduction and firms asymmetry are increasing and decreasing functions of the spillover rate, respectively. In the absence of spillovers, a symmetric joint lab generates higher consumer surplus and social welfare than a pair ofasymmetric competitors. If spillovers are not too small, asymmetric R&D competition is advantageous toconsumers, but not to firms.

Are Energy Market Integrations a Green Light for FDI?

2015

This paper studies the effect of energy market integration (EMI) on foreign direct investment (FDI). EMIs diminish energy uncertainty and price volatility in the host country and affect FDI through two channels: first, by harmonizing energy prices and, second, by reducing price dispersion. FDI may, as a result, increase both within and outside the EMI area, through energy stability mechanisms and price mechanisms, respectively. An empirical application on a global dataset including bilateral FDI data, during 2003-2012, using the gravity equation, shows that the integration of Portugal and Spain's electricity market in 2007 increased the amount of FDI's participants. Additionally, a positive…

THE STABILITY, RISK AND PERFORMANCE OF COOPERATIVE BANKS

2013

In a market economy, tradition, stability and performance of cooperative banks, namely science and art of leadership, management, organization and their administration become major facets in promoting and improving cooperative banks, at the microeconomic level, to which we provide a coherent set of concepts, principles, methods and management techniques, their knowledge contributing to the viability and practical implementation, modernization and development of cooperative banks to increase their profitability and competitiveness in heightened risk conditions on local, national and even global markets. In the context of major changes in Romanian society, the action of the forces inside the …

The Lorenz system : hidden boundary of practical stability and the Lyapunov dimension

2020

On the example of the famous Lorenz system, the difficulties and opportunities of reliable numerical analysis of chaotic dynamical systems are discussed in this article. For the Lorenz system, the boundaries of global stability are estimated and the difficulties of numerically studying the birth of self-excited and hidden attractors, caused by the loss of global stability, are discussed. The problem of reliable numerical computation of the finite-time Lyapunov dimension along the trajectories over large time intervals is discussed. Estimating the Lyapunov dimension of attractors via the Pyragas time-delayed feedback control technique and the Leonov method is demonstrated. Taking into accoun…

Analysis of stability against falling by movement simulation in human walking

2014

Rapid self-healing and anion selectivity in metallosupramolecular gels assisted by fluorine-fluorine interactions.

2017

Simple ML2 [M = Fe(II), Co(II), Ni(II)] complexes obtained from a perfluoroalkylamide derivative of 4-aminophenyl-2,2′,6,2′-terpyridine spontaneously, yet anion selectively, self-assemble into gels, which manifest an unprecedented rapid gel strength recovery, viz. self-healing, and thermal rearrangement in aqueous dimethyl sulfoxide. The key factor for gelation and rheological properties emerges from the fluorine–fluorine interactions between the perfluorinated chains, as the corresponding hydrocarbon derivative did not form metallogels. The perfluoro-terpyridine ligand alone formed single crystals, while its Fe(II), Co(II) or Ni(II) complexes underwent rapid gelation leading to highly enta…

Analytical approach for the problems of dynamics and stability of a moving web

2015

Problems of dynamics and stability of a moving web, modelled as an elastic rod or string, and axially travelling between rollers (supports) at a constant velocity, are studied using analytical approaches. Transverse, longitudinal and torsional vibrations of the moving web are described by a hyperbolic second-order partial differential equation, corresponding to the string and rod models. It is shown that in the framework of a quasi-static eigenvalue analysis, for these models, the critical point cannot be unstable. The critical velocities of one-dimensional webs, and the arising non-trivial solution of free vibrations, are studied analytically. The dynamical analysis is then extended into t…