COMPUTER AIDED DESIGN IN URBAN ARHITECTURE 3D MODELING

The gap from the PC made sketches with the help of the china ink pen and ruler to the digitised drawing boards, high diagonal monitors and 3D projecting is truly spectacular. The increasingly efficient and more specialized programs allow the architects a whole range of facilities providing drawing commands and changes very easy to use, automatic rating, operating simultaneously in multiple windows, building sections and extracts of the plan, 3D views design and even projecting in virtual reality. Applications made to date using virtual reality technologies are characterized, essentially, by generating artificial world and immerging the user into this world. Evolution and effectiveness of such systems are conditioned, first, by the increased hardware performance (computers and specialized devices for interaction) so as to ensure a full immersion of man in the virtual world and, implicitly, a real-time communication with him.Computer aided design, Architecture, C# interface, urban 3D modeling, urban design. Journal: Theoretical and Empirical Researches in Urban Management

FINANCING POLICY OF FIRMS IN THE CONTEXT OF CRISIS-INDUCED VULNERABILITIES

Our study analyses the changes in the financial structure of the firms in the context of the vulnerabilities induced by the financial crisis. The study show that there have been registered a reconfiguration of firms’ financial structure which has triggered an increase in their financial fragility and vulnerability to crises. The results obtained confirm that the effects of financing differ depending on the economic conditions in particular period (normal periods and crisis periods). In tranquil times solvency is more important for the firms than liquidity. After crisis, the firms became more cautious regarding liquidity, solvency and the prospect of securing long-term financial balance. These firms have abandoned the objective of maximizing the positive effects of debt financing adopting a more prudent financing

ESTIMATING THE TERRITORIAL AUTOCORRELATION OF AIR PASSENGERS FLOWS IN EUROPE USING A MULTIVARIATE GRAVITY MODEL

Using a gravity model that includes the cost distances and the airports' mass at origin and destination, we have obtained a matrix of residuals for 21325 air links in Europe. These residuals served as the basis for calculating the coefficients of territorial autocorrelation in a multiple regional context. The coefficients we obtained were classified using an hierarchical clustering, at country level. This final typology shows that the national frontiers are more and more permeable to air traffic, having a limitated impact on the intensity of air links between the airports. Some spatial discontinuities are still at work in the European air space and they still have an influence on the amount of traffic, negatively (West-East opposition) or positively (the Scandinavian countries vs. the mainland). Mapping the residuals of the air flows gravity model indicate that these spatial discontinuities can occur also at regional scales of analysis, but they are fuelled by other logics: economic performance, tourism or workforce migration