Project Management - Software Development Methodology

This article talks about project management in a software development area. The emphasis is given to the process of software development and the main responsibilities of the project manager. Furthermore, some aspects of different management topics that can be found in almost all projects nowadays are also described. To have a successful project one needs to have a team of persons who will participate in the project according to their professional expertise. The teams and sub-teams are defined and their roles are described.project management, software development area, process of software development

Political economy of the US financial crisis 2007-2009

The emphasis of this paper is on the political economy of the subprime mortgage crisis in the United States and how the policy makers contributed to it through their legislation and regulations, made under the rising influence of interest groups and the lobbying activities of the finance industry. The “Great Recession” of 2007-2009 began as a bubble-burst in the mortgage market in the United States that spilled over to the entire financial market of the US, and afterwards to the integrated world financial market. The crisis sprang up over the US real sector and, due to the decline in US aggregate demand, spread consequently to the real economy of the rest of the World. No sound evidence has been given for the publicly proclaimed idea that the causes of the crisis lie within the self-regulating free market. The causes of the crisis lie primarily in the activities of political power, i.e. in the extensive government regulation which has, under the strong influence of interest groups and the lobbying power of financial corporations, led to favouritism in macroeconomic policies and inefficient resource allocation. Regulation was enforced by stimulating affordable housing through government sponsored enterprises, oligopoly of the rating agencies, banking regulation and an increasing connection between government and the finance industry.United States financial crisis, political economy, government regulation, lobbying, political power

Defining region

Regional studies are right in the center of scientific and political discourse at the moment; regional issues acquire special significance in the countries with a transition economy. However, there is still no clear definition of the term “region”. Due to its multifaceted nature, it certainly has natural, cultural, economic, political, and social dimension. At the same time, this term occupies a wide range of phenomena from small parts of countries to huge continental interstate formations. The goal of this paper is the analysis of various theoretical and methodological approaches to the definition of the region. We have brought different approaches, from the classical school to the New Economic Geography. The latter considers the region as a unit of space for economic activities. Thus, the region becomes a multidisciplinary object of research within the framework of economic theory and economic geography. In Europe, the integration processes put the region on the forefront of economic policy. The issues of regional policy are equally important in the light of the economic modernization processes taking place in Russia and Serbia. This article also summarizes the experience of regional studies of Serbian and Russian schools. The results can be used in further theoretical and applied research, writing theses in the field of economics and economic geography

Economy and Ecology: Encounters and Interweaving

In this editorial text, we point to the importance and development of disciplines that closely link economic sciences with ecology. Drawing on the most important literature in these fields, we have highlighted the trends that are popular today in both fields (double eco features)

Hollow core large mode area fibre employing a subwavelength grating reflector

Hollow core large mode area fibres are ideal candidates to guide light at high powers while avoiding non-linear effects and, as such, they are generating much scientific interest. A variety of fibres have been investigated, including tube lattice photonic bandgap fibres and Kagomé-latticed photonic crystal fibres. One of the major challenges in obtaining low loss hollow core fibres is related to the unavoidable perturbations induced by the coupling between the core and cladding modes which is responsible for the increase of leakage loss. Recent approach based on the insertion of additional antiresonant elements demonstrates the significance of fibre geometrical parameters and shows leakage loss of an order of ~10-4 dB/m. In this paper, we present preliminary results of a novel approach to fibres that guide light in a large hollow core, starting from the high index contrast grating reflector platform. Subwavelength gratings have been used to achieve broadband mirrors with reflectivity greater than 99%. Importantly, the physical dimensions of the grating must be smaller than the wavelength of incident light, which implies that the diffraction order of interest is 0th. Under a surface normal incidence on diffraction grating, evanescent orders in the direction parallel to the grating period overlap with the leaky mode of the grating leading to the effect of guided mode resonance and a destructive interference effect between the two grating modes, which results in high reflection

Super-slippery Carbon Nanotubes: Symmetry Breaking breaks friction

The friction between the walls of multi-wall carbon nanotubes is shown to be extremely low in general, with important details related to the specific choice of the walls. This is governed by a simple expression revealing that the phenomenon is a profound consequence of the specific symmetry breaking: super-slippery sliding of the incommensurate walls is a Goldstone mode. Three universal principles of tribology, offering a recipe for the lubricant selection are emphasized.Comment: 4 pages, 2 figures, 1 table; pdf available from: http://www.ff.bg.ac.yu/qmf/qsg_e.ht

Symmetry Based Properties of the Transition Metal Dichalcogenide Nanotubes

The full geometrical symmetry groups (the line groups) of the monolayered, 2Hb and 3R polytypes of the inorganic MoS2 and WS2 micro- and nanotubes of arbitrary chirality are found. This is used to find the coordinates of the representative atoms sufficient to determine completely geometrical structure of tubes. Then some physical properties which can be deduced from the symmetry are discussed: electron band degeneracies, selection rules, general forms of the second rank tensors and potentials, phonon spectra.Comment: 6 pages 1 figur