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Search Results: 1 - 10 of 173739 matches for " Ivanovi? De?an "
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On injection-ejection fluid influence through different accelerating porous surfaces on unsteady 2d incompressible boundary layer characteristics
IvanoviDe?an,Ivanovi? Vladan
Theoretical and Applied Mechanics , 2005, DOI: 10.2298/tam0502131i
Abstract: Through the porous contour in perpendicular direction, the fluid of the same properties as incompressible fluid in basic flow, has been injected or ejected with velocity who is a function of the contour longitudinal coordinate and time. The corresponding equations of unsteady boundary layer, by introducing the appropriate variable transformations, momentum and energy equations and two similarity parameters sets, are transformed into generalized form. These parameters are expressing the influence of the outer flow velocity, the injection or ejection velocity and the flow history in boundary layer, on the boundary layer characteristics. Obtained generalized solutions are used to calculate the distributions of velocity, and shear stress in laminar-turbulent transition of unsteady incompressible boundary layer on different porous contours: circular cylinder, thin elliptical cylinder and aerofoil, whose centers velocities changes in time as a degree functions. The ejection of fluid postpones the boundary layer separation, i.e. laminar-turbulent transition, and vice versa the injection of fluid favors the separation. Boundary layer characteristics are found directly, no further numerical integration of momentum equation.
Unsteady incompressible MHD boundary layer on porous aerofoil in high accelerating fluid flow
IvanoviDe?an J.
Theoretical and Applied Mechanics , 2002, DOI: 10.2298/tam0227087i
Abstract: The fluid, flowing past the surface, is incompressible and its electro-conductivity is constant. The present magnetic field is homogenous and perpendicular to the surface and through the porous contour the fluid has been injected or ejected. In order to study this problem, a polyparametric method known as generalized similarity method has been established. The corresponding equations of unsteady boundary layer, by introducing the appropriate variable transformations, momentum and energy equations and three similarity parameters sets, being transformed into generalized form. The numerical integration of the generalized equation with boundary conditions has been performed by means of the difference schemes and by using Tridiagonal Algorithm Method with iterations in the four parametric and twice localized approximation. So obtained generalized solutions are used to calculate the shear stress distribution in laminar-turbulent transition of unsteady boundary layer on porous high accelerating aerofoil. It's shown that for both in confuser and in diffuser regions the ejection of fluid postpones the boundary layer separation, and vice versa the fluid injection favors the separation. For both injection and ejection of fluid, the magnetic field increases the friction and postpones the laminar-turbulent transition.
Macroregional centers in function of regional development of Serbia
ivanovi? Zora
Glasnik Srpskog Geografskog Dru?tva , 2009, DOI: 10.2298/gsgd0903023z
Abstract: Beside the dominance of Belgrade in regional development of Serbia and marginal role of medium sized cities, macroregional centers were for a long time important carriers of economic development and a driving force of the overall prosperity. The objective of this work is to indicate the role of macroregional centers in the regional development of Serbia through their analysis and comparison of the results with the average values on the state level. Their existence represents a precondition for decentralization of Serbia. .
Comparative analyses of regional politics of the European Union and Serbia
ivanovi? Zora
Glasnik Srpskog Geografskog Dru?tva , 2007, DOI: 10.2298/gsgd0701193z
Abstract: The aim of this article is to show through the comparative analysis, the basic characteristics of regional policy, or the policy of support to the development of less developed areas in our country compared to the regional policy of European Union, with an accent on the instruments for implementation of that policy. Without putting accent on different starting positions for those two development policies, what is for sure the main reason of differences in realized results, the experiences of European Union can be in any case useful and instructive for Serbia as a country with a task of rationalization and establishment of an effective regional policy being a necessity in the forthcoming period.
Social identity of young women from countryside: The example of the village Dudovica - case study
Ivanovi? Suzana
Temida , 2004, DOI: 10.2298/tem0403041i
Abstract: The paper analyses the status, role and identity of young countryside women and their impact on the family and organization of a social life in a village Dudovica. Findings of the survey carried out during 2003 are presented. Understanding the specific social and private life from an angle of young countryside women was the basic aim of this case study. The results are compared with the findings of the survey conducted earlier by Maja Korac. The survey findings show that traditional identity pattern is not predominant, although it still exists together with traditional values and preferences and is in the process of transformation. Young women are not marginalized in their personal and social life, but have public, private and family life, which is partly a result of their higher educational and economic level and certain independence, which was not the case fifteen years ago.
Universal humanity or nationalism
Ivanovi? Miroslav
Theoria, Beograd , 2008, DOI: 10.2298/theo0804073i
Abstract: Dilemma between the universal humanity and nationalism was often discussed in the contemporary philosophy of politics. We will considered discussion about this problem between Soloviov and Danilevsky, two great Russian thinkers of the 19th century. The first defended idea of universal humanity and criticized Danilevsky because of nationalism. We will show that Danilevsky's arguments were stronger and that Soloviev's critics were not successful. The discussion was conducting on three levels: methodological, factual and normativ ones.
Egoism, altruism and self-deception
ivanovi? Igor
Theoria, Beograd , 2011, DOI: 10.2298/theo1103061z
Abstract: This paper represents an attempt to explain the interdependence of egoism and altruism as normative concepts and the possible practical and theoretical consequences if one intends to adhere to the either side of this dichotomy. As possible solutions to some problems arising from egoism and altruism author suggests that motivational mechanism shouldn’t been taken as disqualifying feature of an act or an agent. In the context of interrelation of egoism and altruism special attention is paid to self-deception as psychological, epistemological and ethical problem.
Mihailo Markovi izme u filozofije i ideologije
ivanovi? Igor
Theoria, Beograd , 2010, DOI: 10.2298/theo1002121z
Abstract: nema
Aspect visuel de la deification selon Denys L’areopagite
Ivanovi? Filip
Zbornik Radova Vizantolo?kog Instituta , 2010, DOI: 10.2298/zrvi1047039i
Abstract: One of the thinkers who intellectually consolidated deification and gave it a solid doctrinal basis, which has remained fundamentally important until today, was (Pseudo)-Dionysius the Areopagite. His entire thought was dedicated to the deification of all creation, and ultimate goal was "the cloud of unknowing", in which the soul, following the ascending path of apophatic theology, reaches mystical union with God. The ascending process starts with material objects, symbols, through which God manifests Himself to humanity. Given the reality of the human person, who is called upon to receive the revelation, the Divinity cannot be perceived without the help of mediators that, for Dionysius, were "sacred veils" beneath which the divine light is hidden. The aim of this article is to highlight the role of visual elements (material objects, symbols) as the starting point in the process of deification, and in the context of the aesthetic elements of Christianity and the Church’s doctrine of deification, which owes its foundation to the Areopagite.
Plasma DNA as a biomarker of breast cancer micrometastases
Ivanovi? Vesna
Archive of Oncology , 2002, DOI: 10.2298/aoo0203170i
Abstract:
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