9,970 research outputs found
What lessons can we learn from the present economic crisis for the possible future strategies of enterprises - lesson from Hungary and Slovakia
The paper explores the characteristics of the present economic crisis at enterprise level and its comsequences for possible growth after the crisis. The study builds on international experiences concerning recovery from crisis during the previous economic downturns between 1980 and 2002. Survey results in Hungary and Slovakia are presented with special attention to how companies tried to react to the present economic recession. The study analyses the possible consequences of the strategies followed by the Slovakian and Hungarian firms during the crisis period from the point of view of capabilities for utilizing the options for growth when demand will start to increase
Changes in rotifer communities regarding to the water-level fluctuations in the floodplain Gemenc, Danube, Hungary
The planktonic rotifer communities in three hydrodynamicaly different river-arms at the floodplain of the Danube
river at Gemenc have been studied. In the numerous arms the current has different speeds depending on the water level, therefore
the physical and chemical parameters (temperature, conductivity, transparency, dissolved oxygen content) are different. We have
found forty-six rotifer taxa in the area, but the species-composition changes seasonally. There are therefore big differences in the
qualitative and quantitative data between the main arm and the other branches. At high water levels (flood), the rotifer
communities of the area are uniformized but, at low water levels the area becomes divided into a series of different water bodies,
some near to the lake-state. This phenomenon develops a few days after the flood. The species composition and the abundance
relations of the planktonic rotifer communities reflect this effect
Hirschman meets Williamson: Relationship-specific investment and loyalty
In Albert Hirschman’s theory, loyalty plays a key role in the equilibrium between exit and voice. This article extends economic (rational choice) analysis to the emergence of loyalty, which Hirschman considers an exogenous factor. This is accomplished by linking Williamson’s theory of specific investment to Hirschman’s model. Three cases are distinguished: (1) loyalty is due to specific investment; (2) loyalty is due to (intermediate) factors influenced by specific investment; and, (3) loyalty is independent of specific investment. A simple model formalizes the first case. A paradoxical dynamic of loyalty is identified: a lower degree of specificity may lead to a weakening of loyalty in the short run but astrengthening of loyalty in the long run. An application to the process of European integration is sketched
Degree Variance and Emotional Strategies Catalyze Cooperation in Dynamic Signed Networks
We study the problem of the emergence of cooperation in dynamic signed
networks where agent strategies coevolve with relational signs and network
topology. Running simulations based on an agent-based model, we compare results
obtained in a regular lattice initialization with those obtained on a
comparable random network initialization. We show that the increased degree
heterogeneity at the outset enlarges the parametric conditions in which
cooperation survives in the long run. Furthermore, we show how the presence of
sign-dependent emotional strategies catalyze the evolution of cooperation with
both network topology initializations.Comment: 16 Pages, Proceeding of the European Conference on Modelling and
Simumatio
Signed Networks, Triadic Interactions and the Evolution of Cooperation
We outline a model to study the evolution of cooperation in a population of
agents playing the prisoner's dilemma in signed networks. We highlight that if
only dyadic interactions are taken into account, cooperation never evolves.
However, when triadic considerations are introduced, a window of opportunity
for emergence of cooperation as a stable behaviour emerges.Comment: In Proceedings Wivace 2013, arXiv:1309.712
Triangular Gatzouras-Lalley-type planar carpets with overlaps
We construct a family of planar self-affine carpets with overlaps using lower
triangular matrices in a way that generalizes the original Gatzouras--Lalley
carpets defined by diagonal matrices. Assuming the rectangular open set
condition, Bara\'nski proved for this construction that for typical parameters,
which can be explicitly checked, the inequalities between the Hausdorff, box
and affinity dimension of the attractor are strict. We generalize this result
to overlapping constructions, where we allow complete columns to be shifted
along the horizontal axis or allow parallelograms to overlap within a column in
a transversal way. Our main result is to show sufficient conditions under which
these overlaps do not cause the drop of the dimension of the attractor. Several
examples are provided to illustrate the results, including a self-affine
smiley, a family of self-affine continuous curves, examples with overlaps and
an application of our results to some three-dimensional systems.Comment: 12 figures; v2: improved presentation, updated references, added a
three-dimensional example and an Appendix. Results unchange
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