A theory on the urban rural migration

The internal migration consists one of the major problems that a geographical region faces during the transition process from the traditional way of production to the modern one. Therefore it attracts wide attention in contemporary literature. The purpose of this essay is to prove first of all that the rural urban migration process – contrary to the neoclassical doctrines- cannot be analyzed in the absence of the economic development and the formation of primitive accumulation concepts. Second -contrary to the classical and neoclassical doctrines and the considerations developed in the context of Marxist theory – the migration operates in a selective way. The population surplus does not move (the marginal person according to the academic theory), on a contrary the typical peasant is driven out (or the middle worker), leading to several economic and social consequences for the rural areas. The causes stem from the fact that migration is a non-harmonic mechanism. In latest stages the development of the modern sector (industries- services), via exploitation of agriculture (appropriation of ‘produit net’), destroys the traditional way of life in the mainland (in which rationalism is being “introduced”), while the appearance of development poles makes the cities attractive to rural population. The two factors pulling– repulsion are dialectically associated, having as a result the impressive urbanization of the recent years.peer-reviewe

Introductory Chapter: Introduction to Dependability Engineering

Cloud computing presents some challenges that are needed to be overcome, such as planning infrastructures that maintain availability when failure events and repair activities occu

Land and capital accumulation in Greek agriculture by region (1950-2010)

After the liberation (1828) the land that belonged to the Turks became state-owned land. A large part of the state’s revenue was covered by the rent. The distribution of national domain, as it was called; in the year 1871 solved the problem that arose by the farmer’s discomfort against the state-landlord. A new important issue arose by the adaptation of Thessaly (1881), where the Turks when they were leaving, sold their land, often for very low price, to Greek capitalists. Thus, the manors appeared. This issue took tremendous dimensions at the beginning of the 20th century with the villagers’ riots at this region. After the Balkan Wars (1912, 1913) and World War I the annexation of Macedonia, Epirus and Thrace, where domains prevailed, inflated the problem. The entrance of the refugees after the Asia Minor disaster (1922) led the governments to extended land consolidation. In order to multiply the farming lands, at the decade of 1930, large productive works were carried out in northern Greece (drainage of lakes, ponds etc.). After World War II the program of landimprovement works was accelerated and as a result the number of irrigated lands was significantly increased and the cultivated land differed, while the plantations expanded very quickly. During 1950 to 80 through subsidy loans by the public Agriculture Bank, a modernization of agriculture was attempted (mechanization, improved seeds, pesticides etc) and restructuring of farming was partially achieved. The aim of this paper hereof is double: Firstly, it seeks to investigate, something which does not exist in Greek bibliography, what was the value of the land, in relevance to the capital accumulation, not only in the whole country, but also per prefecture and secondly, which was the contribution of the land improvement at the growth of the product. The data arose from long-term investigation of authors over the subject of framing the agriculture economy sizes and the method was based on the archives consultation.peer-reviewe

Utilisation of ensemble empirical mode decomposition in conjunction with cyclostationary technique for wind turbine gearbox fault detection

In this paper the application of cyclostationary signal processing in conjunction with Ensemble Empirical Mode Decomposition (EEMD) technique, on the fault diagnostics of wind turbine gearboxes is investigated and has been highlighted. It is shown that the EEMD technique together with cyclostationary analysis can be used to detect the damage in complex and non-linear systems such as wind turbine gearbox, where the vibration signals are modulated with carrier frequencies and are superimposed. In these situations when multiple faults alongside noisy environment are present together, the faults are not easily detectable by conventional signal processing techniques such as FFT and RMS

Advances in Machine Condition Monitoring and Fault Diagnosis

In the past few decades, with the great progress made in the field of computer technology, non-destructive testing, signal and image processing, and artificial intelligence, machine condition monitoring and fault diagnosis technology have also achieved great technological progress and played an active and important role in various industries to ensure the efficient and reliable operation of machines, lower the operation and maintenance costs, and improve the reliability and availability of large critical equipment [...

Introductory Chapter: An Overview to Maintenance Management

The industry requires maintenance to ensure the correct operations of the engines, components, structures, etc. Any failure, that is, termination of the ability of an item to perform a required function, generates downtimes, costs, risks for the human labors, etc. The high competitiveness in the current industry does not lead these failures to the firms