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Search Results: 1 - 10 of 790 matches for " Perovi? Slobodan "
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Why Rosenberg and Kaplan's attempt to reconcile physicalism and antireductionism concerning biology is unsatisfactory
Theoria, Beograd , 2008, DOI: 10.2298/theo0801007p
Abstract: A. Rosenberg and D. Kaplan argue that their account of the Principle of Natural Selection (PNS), as a law of physical systems (including those systems studied by biology) underived from familiar physical laws, provides the precisely explanatory autonomy of biology sought after by antireductionists, without violating the principles of reductive physicalism. I argue, however, that the possibility of the PNS being an underived law of physical systems may be neutral to the explanatory autonomy of biology. In fact, if wedded with reductive physicalism (the possibility considered by these authors), it may yield only a very limited explanatory autonomy of biology, no stronger than the quasi-autonomy generally ascribed to it by reductionists. In the physicalist world, the PNS is operational and thus discoverable at the higher ontological levels (those concerning living cells, individuals, groups, populations and species), because the operation of a law concerning higher-level systems is grounded in its operation at the lower levels (atoms and molecules). Consequently, in terms of the explanatory criterion, a generalization discovered by biologists may be established as a law only if its status is confirmed in the form of its applicability to molecular and other systems studied by chemistry and physics. Otherwise, there is a danger that it could be a 'just so story.' The authors' narrow understanding both of antireductionism and biological laws as reducible to those concerning molecular systems provides only an illusory vindication of the explanatory autonomy: in the case of the PNS, although biologists happened to be the first to utilize it, their research concerning cells, individuals, populations and species could not possibly have established it as a law. This results, at best, in the inter-theoretic irreducibility of molecular biology as a discipline of physical science. I argue that a substantial explanatory autonomy of biology concerns the causal powers of biological systems at multiple levels, where the PNS, or any other biological law, is a basic law of nature in that it is concerned with the entities whose causal power is irreducible to that of the lower-level entities. Thus, only if confirmable at the levels higher than the molecular, could the generalizations discovered by biologists reflect such autonomy.
Renal transplantation vs hemodialysis: Cost-effectiveness analysis
Perovi? Sa?a,Jankovi? Slobodan
Vojnosanitetski Pregled , 2009, DOI: 10.2298/vsp0908639p
Abstract: Background/Aim. Chronic renal insufficiency (CRI), diabetes, hypertension, autosomal dominant polycystic kidney disease (ADPKD) are the main reasons for starting dialysis treatment in patients having kidney function failure. At present, dialysis treatments are performed in about 4,100 patients at 46 institutions in Serbia, out of which 90% are hemodialyses. At end-stage renal disease (ESRD) the only correct selection is kidney transplatation. The basic aim of the planned research was to compare ratio of costs and effects (Cost Effectiveness Analysis - CEA) of hemodialysis and kidney transplantation in patients at ESRD. Methods. As the main issue of treatment in patients from both groups the life quality measured by the validated McGill Questionary, was used. The study included 150 patients totally, divided into two groups. The study group consisted of 50 patients with kidney transplantation performed at the Clinical Center of Serbia and the control group consisted of 100 patients on hemodialysis at Clinical Center of Serbia, Clinical Hospital Center Zemun, Clinical Hospital Center 'Zvezdara', Clinical Center Kragujevac and Health Center 'Studenica', Kraljevo, comparable with respect to sex, age and length of treatment with the study group. Results. Effect of kidney transplantation in relation to hemodialysis being selection of treatment is expressed in the form of incremental ratio of costs and effects (Incremental Cost-Effectiveness Ratio - ICER). It is clear from the enclosed tables that the strategy of kidney transplantation is far more profitable considering the fact that it represents saving of EUR 132,256.25 per one year of contribution Quality Adjusted Life Years (QALY) within the period of 10 years. According to all aspects of live quality (physical symptoms and problems, physical well-being, psychological symptoms, existential well-being and support), difference is statistically important in favor of transplant patents. Conclusion. The costs of patient therapy by hemodialysis at end-stage renal disease is far greater than by performing therapy of transplantation and maintenance, by almost three and a half times. Difference in total quality aspects of human life (physical, emotional, social, spiritual and financial) between dialyzed and transplant patients is statistically significant and by 18.12% greater in transplant patients than in patients on hemodialysis.
Morphometric characteristics of the leaves of Greek maple (Acer heldreichii Orph) in central Serbia
Perovi? Marko
Glasnik ?umarskog Fakulteta , 2007, DOI: 10.2298/gsf0796069p
Abstract: The taxonomic characteristics of Greek maple (Acer heldreichii Orph) were studied based on the analysis of leaf characteristics, by comparative-morphological method. The study was performed at three localities in central Serbia: Go , Jastrebac and Rudnik. 30 normally developed trees were selected per each locality, and 30 leaves were selected from each tree for the analysis. The study includes 8 measured and 15 derived characteristics of leaves. The study results were statistically processed by correlation analysis, analysis of variance and cluster-analysis. It is concluded that there are two varieties, var. heldreichii and var. macropterum. Four forms are set aside in the variety macropterum: f. typicum f. dissectum, f. Equiloba and f. rotundiloba. The populations are relatively homogeneous, and both varieties occur at all three localities in significant numbers.
Mogu nosti Lije enja Osteoporotskih Prijeloma Kralje nice
Gojko Buljat , Darko Perovi
Archives of Industrial Hygiene and Toxicology , 2007, DOI: 10.2478/v10004-007-0008-4
Abstract: Osteoporosis is a skeletal disease characterized by reduced bone strength due to the loss of bone mass, structural disproportion and reduced calcium level as well as changes in the bone structure caused by trabecular deficit. The loss of bone mass in the vertebrae leads to an increased risk of fractures. Osteoporotic vertebral fractures are two to three times more frequent than hip fractures, especially in women. Osteoporotic compressive fractures of the spine mostly occur in the middle and lower thoracic spine and in the thoracolumbar spine. Common consequences of fractures include long-term pains, decrease in the height and spinal deformity, which significantly correlate with disorders in the gait and mobility, reduced pulmonary function, loss of appetite and in the end increased mortality. Clinical picture in acute conditions manifests itself as a sudden pain in the back following minimal trauma but also often without any trauma at all. Diagnostics is based on a detailed medical history and a thorough clinical examination. Radiological diagnosis relies on standard x-rays. In case of clinical indication (differential diagnosis of tumor or spondylitis, neurological weakness) CT and/or MR imaging is performed. The approach to the treatment of osteoporotic fractures of the spine is individual and is based upon the medical history, localization of symptoms and correlation of the clinical examination with the radiological finding. Open reduction, decompression and fixation are indicated in patients with posttraumatic stenosis and neurological weakness. Current operative methods include vertebroplasty and kyphoplasty, which significantly reduce pain and improve mobility of the patient and consequently, the quality of life.
Green development and participation-implications for countries in transition: Case study of Stara Planina, Republic of Serbia
Perovi? Ma?a
Spatium , 2008, DOI: 10.2298/spat0818038p
Abstract: The following research looks at opportunities and obstacles for applying public participation and sustainable environmental management in countries in transition. The case study analyses how the plans to develop a ski resort on the Stara Planina in the Republic of Serbia were created. The results show that factors which influence unsustainable developments are a lack of enforceable laws and the rule of law; lack of public awareness and information on relevant issues; weak civil society and lack of community involvement in decision making; high level of corruption in government and the public sector; highly politicized society with much influence from informal sources of power and their interests. The research concludes that with effective public participation the developments would be more environmentally sustainable. For participation to be effective there is a need to raise environmental awareness in the region as a consequence of the communist past and marginalisation of rural areas. .
Constitutional organization of the regional state in Spain
Perovi? Bojana M.
Medjunarodni Problemi , 2010, DOI: 10.2298/medjp1003489p
Abstract: The author explores distinctiveness of the regional state mostly in Spain as third model of territorial organization. Unlike unitary and federal, regional state is not wide-spread and broad accepted concept of vertical organization although modern Spain and Italy represents examples of good practice. Having in mind diversity of regional identities and strong cultural distinctiveness in Catalonia, the Basque Country, Galicia and other areas, author is wondering if any other model of territorial organization could be sustainable in such socio-cultural environment. After the period of Franco’s dictatorship, which had been trying to exterminate cultural and historical particularities among Spanish nations, decentralization demands have become more stronger resulting with the new constitution adopted in 1978. This act has set the corner-stone of modern Spanish democracy based on Autonomous Communities as specific forms of decentralized state and territorial autonomy.
Modern notion of time notion of history: About the basis of Heideggers' discussion with Hegel
Perovi? Milenko A.
Zbornik Matice Srpske za Drustvene Nauke , 2003, DOI: 10.2298/zmsdn0315007p
Abstract: In the text, the author analyses Heidegger's critique of Hegel's notions of time and history, reaching the conclusion that the weak points of that critique are contained in the fact that it did not take into account Hegel's idea of the phenomenology of time.
Subjective Economic Well-being in Transition Countries: Investigating the Relative Importance of Macroeconomic Variables
Lena Male?evi? Perovi
Financial Theory and Practice , 2008,
Abstract: In this paper we combine the data from surveys about life-satisfaction and macroeconomic data and analyse the (order of) importance of macroeconomic variables for one’s subjective economic well-being. This approach allows an analysis from a subjective view – that of the public, in contrast to the usually used objective view, whereby policy goals are assumed to reflect public opinion. We find that the key macroeconomic variables of inflation, unemployment and GDP (growth) matter for the public’s sense of economic well-being in transition countries. Moreover, improvements in national income lead to both temporary and permanent gains in subjective economic well-being in transition countries. Habituation effects are present, indicating that individuals become accustomed to an increase in national income, but not all the benefits of this increase dissipate over time. Furthermore, GDP growth and unemployment are found to be more important than inflation in transition countries. This suggests that achieving GDP growth is an important goal of economic policy not only from the point of view of policy-makers but also from that of the public, and that it should be pursued. On the other hand, given that unemployment is more important than inflation for the public’s economic well-being, policy-makers in transition countries might need to revise their exclusive focus on inflation.This is to say that more effort should be put into decreasing unemployment (which might have an adverse effect on inflation) rather than into restraining inflation.
Cointegration Approach to Analysing Inflation in Croatia
Lena Male?evi?-Perovi
Financial Theory and Practice , 2009,
Abstract: The aim of this paper is to analyse the determinants of inflation in Croatia in the period 1994:6-2006:6. We use a cointegration approach and find that increases in wages positively influence inflation in the long-run. Furthermore, in the period from June 1994 onward, the depreciation of the currency also contributed to inflation. Money does not explain Croatian inflation. This irrelevance of the money supply is consistent with its endogeneity to exchange rate targeting, whereby the money supply is determined by developments in the foreign exchange market. The value of inflation in the previous period is also found to be significant, thus indicating some inflation inertia.
Fractal Dimension in Animal Model of Alzheimer’s Dementia  [PDF]
Ljiljana Marta?, Slobodan Sekuli?
Journal of Behavioral and Brain Science (JBBS) , 2018, DOI: 10.4236/jbbs.2018.89031
Abstract: The aim of this study was to qualitatively described effect of the oxidative stress, neurotransmission change and the neurodegeneration in animal model of chronic intoxication by aluminum. Electrocortical brain activity of animal model of stress and neurodegeneration is comparable with Alzheimer’s Dementia (AD). We used adult animals, during 6 weeks intraperitoneally treated with aluminum. Both animals and patients with Alzheimer’s Dementia have increased relative spectral power in delta range. By fractal analysis we described changes in electrocortical activity of aluminum intoxication animals compare to physiological control. We used change in delta range to calculate fractal dimension for the pathophysiological state of disease. We evaluate effect of stress and neurodegeneration, oxidative stress and accumulation of beta amyloid and neurofibrillary tangles as change in fractal dimension (FD). We conclude that change in fractal dimension could be used for prognosis of AD. Results show that decrease in fractal dimension could be used for evaluation of changes in neural activity in occurrence of AD.
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