Wavelet sets with and without groups and multiresolution analysis

In this dissertation we study a special kind of wavelets, the so-called minimally supported frequency wavelets and the associated wavelet sets. Most of the examples of wavelet sets are for dilation sets which are groups. In this work we construct wavelet sets for which the dilation set, D, is of the form D=MN, where the product is direct, and so D is not necessarily group. In the second part of this dissertation we construct multiwavelets associated with MRA\u27s and we generalize the rotations in the dilation sets to Coxeter groups

CLIMATE CHANGES – ESSENTIAL CHALLENGE FOR THE ECONOMY OF KNOWLEDGE Emilian M. Dobrescu, Romanian Academy Diana-Mihaela Pociovalisteanu , “Constantin Brancusi†University of Targu Jiu Gabriel Popescu , The Bucharest Academy of Economic Studies

The European Union proposed a new model of economy, at this beginningof century and millennium: the economy of knowledge, simultaneous with the emergenceof a new existential reality for us people, after Christ was born; this new, existentialreality are the climatic changes.In spite of the warning signals drawn by specialists, the more profound conquests ofscience, only a new educational model can save the humankind of a galloping fall inpromiscuity but also in eternity.economy of knowledge, educational model, cohesion policy, changes

Terminologie des techniques de décontamination des sols

L'objet de cette recherche a été d'établir et de définir une nomenclature des notions de base des techniques de décontamination des terrains, qui comptent parmi les moyens de réhabilitation environnementale. Le résultat des recherches terminologiques a été utilisé afin d'apporter une contribution au développement d'une banque terminologique disponible sur Internet. La méthodologie appliquée est celle de la recherche thématique bilingue : à partir d'un corpus de textes spécialisés, l'on a procédé à la constitution d'une nomenclature, qui a fait l'objet d'une recherche terminologique, tant en langue française qu'en langue anglaise. Les dossiers terminologiques ainsi élaborés ont été validés par un comité d'experts et intégrés sous forme de fiches au Grand dictionnaire terminologique, produit et mis en ligne par l'Office québécois de la langue française

Afganistan and rare earths

On our planet, over a quarter of new technologies for the economic production of industrial goods, are using rare earths, which are also called critical minerals and industries that rely on these precious items being worth of an estimated nearly five trillion dollars, or 5 percent of world gross domestic product. In the near future, competition will increase for the control of rare earth minerals embedded in high-tech products. Rare minerals are in the twenty-first century what oil accounted for in the twentieth century and coal in the nineteenth century: the engine of a new industrial revolution. Future energy will be produced increasingly by more sophisticated technological equipment based not just on steel and concrete, but incorporating significant quantities of metals and rare earths. Widespread application of these technologies will result in an exponential increase in demand for such minerals, and what is worrying is that minerals of this type are almost nowhere to be found in Europe and in other industrialized countries in the world, such as U.S. and Japan, but only in some Asian countries, like China and Afghanistan

THE IMPACT OF MIGRATION ON ROMANIA'S ECONOMICAL AND SOCIAL DEVELOPMENT

Free movement for people is one of the most fundamental freedoms guaranteed by European Union law and it is a necessary precondition for building a single market. Greater adaptability on the part of workers through migration process is also a key element in making Europe Union more competitive at a global level, and at an individual level enabling employees to raise their skills levels and their employability, income and career prospects. In this paper I’m trying to review several aspects regarding the Romanian labour market, the causes that determined the labour force to emigrate in European Union’s member states, as well as migrations’ effects on the supply and demand on the labour market. Migration can have both positive and negative effects on economical and social life from the origin country

GLOBALIZATION AND IMPACT ON DEMOGRAPHY

The present paper aims to present the global demographic evolution up to 2050 as a result of globalization and the various policies adopted by the countries of the world, as well as the economic and social implications resulting from the demographic decline. The population of the planet reached 7 billion people in May 2011 and will reach as much as 9 billion in 2050 according to a United Nations forecast. The UN experts also show that the population of the planet will grow to 8 billion people in 2023, 9 billion by 2041, and 10 billion people after 2081. Population growth will mainly occur in the so-called "extremely fertile countries" Africa, Asia, Oceania and Latin America, according to UN data. Researchers have warned, however, that a very small variation in female fertility could lead to major changes in the evolution of the planet's population, according to UN Department of Economic and Social Affairs reviews. By 2095-2100, global life expectancy will increase from 68 to 81 years, especially in the context of new treatments for diseases that reduce the number of early deaths in parts of the Earth, including Africa

Hydro Energy Is Really a "Clean" Energy? Ecological Problems Generated by Hydropower Plants

Hydraulic energy is the ability of a physical system (running water, generally speaking river) to perform a mechanical work when flowing from a higher position to a lower position. Thanks to the water circuit in nature, maintained by the Sun's energy, hydraulic energy is a type of renewable energy. This form of energy is utilized through hydropower plants. Some of the hydroelectric plants are very large, such as the Roman-Serbian border Porţile de Fier I (Iron Gates I, in english) (the largest on the Danube) and the Portţile de Fier II (Iron Gates II). Other hydroelectric plants are medium but also very small, such as those installed on the small rivers in the Făgăraş Mountains, such as the rivers Capra, Buda, Topolog etc., some even in the Natura 2000 protected areas; more than 500 micro-hydropower plants after National Geographic. But there is a contradiction: the ecological quality of the rivers must increase, but we also need to increase the percentage of renewable energy. With their negative environmental impact, hydropower plants of any size, does not generate a so "green" energy just as it desires. Solving the discrepancy between the economically and ecologically interests, is the key to sustainable development in the Danube area

The Necessity to Expand the Surface of Protected Areas in Romania

The protected natural areas are those areas where we find the most representative and valuable elements of the natural heritage (heritage). On the Globe there are a multitude of categories, of ranks of protected areas, from nature monuments, to National Parks and Biosphere Reservations, from areas under one hectare to hundreds of thousands of square kilometers. The EU has in the field of nature protection the European Ecological Network Natura 2000; this network consists of more than 26 000 protected sites covering aprox. 20% of the EU's land area. This is the largest, more complex network of environment protection in the world. It provides protection for endangered European species and habitats and, indirectly, contributes to the prosperity of the countries on whose territory it is implemented, through the ecological services provided. In Romania, at the level of 2018, the total protected areas represent about 23.65% of the total area; compared to other European countries, the area of these protected areas should be increased. But beyond the comparison with other countries, the need to increase the area of protected areas lies in the fact that, in the context of climate change on Earth, the only way in the future to safely address their effects is to protect the environment and to reduce as much as possible the anthropic “footprint”