Search results for "Movement"
showing 10 items of 2021 documents
Drumming signals within the family Taeniopterygidae (Plecoptera)
2014
Drumming signals of the 11 species of Palaearctic Taeniopterygidae are described for the first time based on the study of populations from nine different European countries from Spain to Russia. In this way, a contribution is made to our knowledge of the constancy respectively the divergence of signals typical for the species distributed over a very wide area. Communication patterns of the family under varying temperatures were analysed. The dependence on temperature indicates that the adults of this family are cold stenothermic insects. Within the genus Brachyptera (Newport, 1851), the call signal of males is significantly different from their response signal (duration and drumming frequen…
Geovisualizing the sail-to-steam transition through vessel movement data
2017
International audience; Technological transitions in the maritime and port industries go along with increased transport and economic efficiency, resulting in faster movements and longer travelled distances. Yet, such transformations may also enhance disparities between winners and loosers, should they be ports or shipping companies. This research focuses on the particular case of the transition from sail to steam over the period 1890-1925, which witnesses the rapid replacement of sailing vessels, the latter concentrating 65% of the world fleet in 1890 but only 3.5% in 1925. It applies a variety of measures to compare how these two layers overlap in the network (at links and ports) and what …
From industrial consensus to environmental regulation: the coming of the Finnish industrial waste-water policy
1998
Abstract The development of the Finnish industrial waste-water policy is examined in the context of the national industrial development and the rise of the environmental movement. It is stated that up until the beginning of the eighties, a broad consensus about the principles of the waste-water policy prevailed among decision makers and authorities. It was a consensus uniform with the interests of the forest industry, the most powerful part of the national economy. Unfortunately, the forest industry was a bad source of pollution of the inland waters since the fifties. However, the long lasted hegemonic consensus started to break down in the late seventies and early eighties by an awakening …
New Labor Migration Trends: Evidence from Latvia
2009
Accession to the European Union and the subsequent free movement of labor in a more open labor market became a factor which promoted mobility among the residents of the EU's new member states. Latvia is one of the 10 countries in Central and Eastern Europe which joined the EU on May 1, 2004. Migration in Latvia has become a topic of economic, political and social importance. The aim of this paper is to analyze the Latvian labor migration processes that have unfolded since the EU enlargement in 2004. Results from the survey showed that substantial numbers of residents have emigrated. In Latvia economic and temporary aspects of migration continue to dominate. Another important issue today is …
ECONOMIC COMOVEMENTS IN EUROPEAN COUNTRIES
2005
This paper examines the existence of common movements in production, prices and interest rates in three countries: France, Germany and the United Kingdom. To analyse this issue, the usual approach of studying cross-correlations is extended. Though these European countries are closely linked to each other, the results obtained vary substantially over time, with the economic variables and in the countries under consideration. Este trabajo examina la existencia de movimientos comunes en la producción, en los precios y en los tipos de interés en tres países: Francia, Alemania y el Reino Unido. Para analizar este tema, se extiende el enfoque habitual del estudio de las correlaciones cruzadas. A …
The Prospects for the Social Economy in a Changing World
1997
Even if the ‘social economy’ has traditionally been marginalized and a subordinated form of production within capitalist societies, the economic, social, territorial and environmental problems of the present times have tended to make it a strategic instrument. This is not only because of its qualities as an economic and management instrument, but also because it is an expression of a dynamic and creative civil society. The aim of this paper is to show the potential of the social economy, the way it has been encapsulated during the postwar period and the conditions that now favour its full development. In the face of new challenges, the efficiency criterion, hitherto used to assess alternati…
Co-movement of public spending in the G7
2010
Abstract The size of government in the G7 countries in the last fifty years follows a common pattern (see the left panel of Fig. 1 below): it grows in the first three decades, and then turns flat at the beginning of the nineties, for all countries alike. We highlight this common pattern in a dynamic factor model, and argue that a satisfactory explanation for it would be desirable.
Synthesis ofmeta-Terphenyl-2,2′′-diols by Anodic C−C Cross-Coupling Reactions
2016
The anodic C-C cross-coupling reaction is a versatile synthetic approach to symmetric and non-symmetric biphenols and arylated phenols. We herein present a metal-free electrosynthetic method that provides access to symmetric and non-symmetric meta-terphenyl-2,2''-diols in good yields and high selectivity. Symmetric derivatives can be obtained by direct electrolysis in an undivided cell. The synthesis of non-symmetric meta-terphenyl-2,2''-diols required two electrochemical steps. The reactions are easy to conduct and scalable. The method also features a broad substrate scope, and a large variety of functional groups are tolerated. The target molecules may serve as [OCO](3-) pincer ligands.
ChemInform Abstract: Synthesis of meta-Terphenyl-2,2′′-diols by Anodic C-C Cross-Coupling Reactions.
2016
The anodic C−C cross-coupling reaction is a versatile synthetic approach to symmetric and non-symmetric biphenols and arylated phenols. We herein present a metal-free electrosynthetic method that provides access to symmetric and non-symmetric meta-terphenyl-2,2′′-diols in good yields and high selectivity. Symmetric derivatives can be obtained by direct electrolysis in an undivided cell. The synthesis of non-symmetric meta-terphenyl-2,2′′-diols required two electrochemical steps. The reactions are easy to conduct and scalable. The method also features a broad substrate scope, and a large variety of functional groups are tolerated. The target molecules may serve as [OCO]3− pincer ligands.
Dynamics of Magnetotactic Bacteria in a Rotating Magnetic Field
2007
The dynamics of the motile magnetotactic bacterium Magnetospirillum gryphiswaldense in a rotating magnetic field is investigated experimentally and analyzed by a theoretical model. These elongated bacteria are propelled by single flagella at each bacterial end and contain a magnetic filament formed by a linear assembly of approximately 40 ferromagnetic nanoparticles. The movements of the bacteria in suspension are analyzed by consideration of the orientation of their magnetic dipoles in the field, the hydrodynamic resistance of the bacteria, and the propulsive force of the flagella. Several novel features found in experiments include a velocity reversal during motion in the rotating field a…