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Search Results: 1 - 10 of 1859 matches for " Milena Radnovi? "
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Asymptotic behaviour of the fourth Painlevé transcendents in the space of initial values
Nalini Joshi,Milena Radnovi
Physics , 2014,
Abstract: We study the asymptotic behaviour of solutions of the fourth Pain\-lev\'e equation as the independent variable goes to infinity in its space of (complex) initial values, which is a generalisation of phase space described by Okamoto. We show that the limit set of each solution is compact and connected and, moreover, that any non-special solution has an infinite number of poles and infinite number of zeroes.
Pseudo-integrable billiards and arithmetic dynamics
Vladimir Dragovi?,Milena Radnovi
Physics , 2012,
Abstract: We introduce a new class of billiard systems in the plane, with boundaries formed by finitely many arcs of confocal conics such that they contain some reflex angles. Fundamental dynamical, topological, geometric, and arithmetic properties of such billiards are studied. The novelty, caused by reflex angles on boundary, induces invariant leaves of higher genera and dynamical behaviour different from Liouville-Arnold's theorem. Its analogue is derived from the Maier theorem on measured foliations. A local version of Poncelet theorem is formulated and necessary algebro-geometric conditions for periodicity are presented. The connection with interval exchange transformation is established together with Keane's type conditions for minimality. It is proved that the dynamics depends on arithmetic of rotation numbers, but not on geometry of a given confocal pencil of conics.
On Some Basic Concepts of Genetic Algorithms as a Meta-Heuristic Method for Solving of Optimization Problems  [PDF]
Milena Bogdanovi?
Journal of Software Engineering and Applications (JSEA) , 2011, DOI: 10.4236/jsea.2011.48055
Abstract: The genetic algorithms represent a family of algorithms using some of genetic principles being present in nature, in order to solve particular computational problems. These natural principles are: inheritance, crossover, mutation, survival of the fittest, migrations and so on. The paper describes the most important aspects of a genetic algorithm as a stochastic method for solving various classes of optimization problems. It also describes the basic genetic operator selection, crossover and mutation, serving for a new generation of individuals to achieve an optimal or a good enough solution of an optimization problem being in question.
The Importance of Health Records  [PDF]
Milena Marini?
Health (Health) , 2015, DOI: 10.4236/health.2015.75073
Abstract: Health records have played an increasingly important role throughout history as an important legal document for the exercise of individuals’ rights. However, domestic legislation fails to define health records as a legally important collection of health data and documents. Recording facts and storing legally important documents are therefore the tasks of the operator. Using the prescriptive method we will determine which laws are governing the management of medical records, their safety and accessibility. Based on the descriptive method, we will describe the process of handling health records by the provider of health treatment, focusing on exposed regulatory gaps in the area of the protection of the rights of an individual. Through the analysis of the laws governing the management of health records, even after death and operator terminating the service, we will carry out inductive reasoning and provide conclusions regarding the attitude towards health records. Considering different results we can conclude that health information, especially documents relevant to the protection of individual’s rights, is not transparent. Above all, the documents in the collection are not recorded properly, thus allowing for their removal. Even the transfer of health records by the provider of health treatment is not defined, which could result in the disposal of the entire health documentation.
Printed Antenna Arrays with High Side Lobe Suppression
Aleksandar Ne i ,Ivana Radnovi ,Zoran Mi i
Active and Passive Electronic Components , 2008, DOI: 10.1155/2008/542929
Abstract: The problem of side lobe suppression (SLS) in printed antenna arrays has been investigated in the paper. Influence of several factors that make difficult design and realization of antenna arrays with relatively high SLS has been analyzed. We introduced a new type of printed antenna array with symmetrical pentagonal dipoles and symmetrical tapered feed network with Chebyshev distribution enabling SLS better than 34 dB in E-plane. Agreement between simulated and measured results is very good. The antenna is suitable for integration with other microwave circuits. Presented antenna is low cost and very simple for realization.
Detection of enteroviruses in clinical samples of patients with aseptic meningitis by rapid antigen detection assay
Radovanov Jelena,Milo?evi? Vesna,Radnovi? Dragan,Jerant-Pati? Vera
Srpski Arhiv za Celokupno Lekarstvo , 2011, DOI: 10.2298/sarh1112759r
Abstract: Introduction. Human enteroviruses represent the most common etiological agents of aseptic meningitis. Rapid diagnosis of aseptic meningitis affects the management of patients. Objective. The aim of this work was to assess the efficacy of rapid antigen detection (RAD) assay for the confirmation of human enteroviruses in comparison to that of the conventional cell culture (CCC), and to identify the serotypes associated with aseptic meningitis cases in the Autonomous Province of Vojvodina. Methods. RAD assay was carried out using centrifugation of inoculated Vero, RD and HEp-2 cell cultures and indirect immunofluorescence with Pan-Enterovirus 2E11 reagent (Millipore-Chemicon). CCC was performed using the same type of cells and the same immunofluorescence reagent for enterovirus confirmation. Results. Out of 70 analyzed samples (29 cerebrospinal fluid specimens, 27 stool specimens, 9 rectal and 5 throat swabs) , 36 (51.4%) were positive by immunofluorescence after CCC and 34 (48.6%) by the RAD assay. The sensitivity of RAD assay was 94.4% and specificity 100%. Detection time of enteroviruses by the RAD assay was 3 days, and by CCC varied from 3 to 13 days (mean time 6.1 days). Within 72 h from inoculation, a cytopathic effect (CPE) occurred in only 19 (47.5%) of 40 CPE positive samples. Serotyping revealed 11 types of enteroviruses: coxsackievirus A16, B3, B4, B5, and echovirus 2, 4, 6, 11, 13, 16 and 30. Conclusion. The RAD assay was slightly less sensitive than CCC and significantly shortened the detection time of enteroviruses, so it may be useful in rapid diagnosis of enteroviral meningitis.
Antimicrobial activity of Satureja hortensis L. essential oil against pathogenic microbial strains
Mihajilov-Krstev Tatjana,Radnovi? Dragan,Kiti? Du?anka,Stojanovi?-Radi? Zorica
Archives of Biological Sciences , 2010, DOI: 10.2298/abs1001159m
Abstract: A hydro-distilled oil of Satureja hortensis L. was investigated for its antimicrobial activity against a panel of 11 bacterial and three fungal strains. The antimicrobial activity was determined using the disk-diffusion and broth microdilution methods. The essential oil of S. hortensis L. showed significant activity against a wide spectrum of Gram (-) bacteria (MIC/MBC=0.025-0.78/0.05-0.78 μl/ml) and Gram (+) bacteria (MIC/MBC=0.05-0.39/0.05-0.78 μl/ml), as well as against fungal strains (MIC/MBC=0.20/0.78 μl/ml). The results indicate that this oil can be used in food conservation, treatment of different diseases of humans, and also for the treatment of plants infected by phytopathogens.
Use of Continuous Regional Anesthetic for Management of Pediatric Sickle Cell Crisis  [PDF]
Julie T. Vuong, Milena Pilipovic
Open Journal of Anesthesiology (OJAnes) , 2012, DOI: 10.4236/ojanes.2012.25053
Abstract: Sickle cell patients often find difficulty obtaining adequate treatment of pain. Anti-inflammatory medications, steroids, and opioids can reduce pain; however their use is limited by side effects. We present a 12 year old female with sickle cell disease who was admitted with severe right thigh pain secondary to acute infarction of the proximal femoral diaphysis.She was treated with intravenous hydration, ketorolac and opioids with no relief. The patient agreed to a continuous femoral nerve block, which was done under sedation. Pain relief was obtained immediately. The infusion was discontinued after 3 days and the patient was discharged the day after catheter removal with a one week supply of fentanyl patches and home dose of oral oxycodone. We suggest continuous femoral nerve block as an adjunct to treat sickle cell pain crises involving the lower extremity. Regional techniques may vasodilate and thus improve the nociceptive, vasoconstrictive pain associated with acute pain crises.
Fine Gradings of Low-Rank Complex Lie Algebras and of Their Real Forms
Milena Svobodová
Symmetry, Integrability and Geometry : Methods and Applications , 2008,
Abstract: In this review paper, we treat the topic of fine gradings of Lie algebras. This concept is important not only for investigating the structural properties of the algebras, but, on top of that, the fine gradings are often used as the starting point for studying graded contractions or deformations of the algebras. One basic question tackled in the work is the relation between the terms 'grading' and 'group grading'. Although these terms have originally been claimed to coincide for simple Lie algebras, it was revealed later that the proof of this assertion was incorrect. Therefore, the crucial statements about one-to-one correspondence between fine gradings and MAD-groups had to be revised and re-formulated for fine group gradings instead. However, there is still a hypothesis that the terms 'grading' and 'group grading' coincide for simple complex Lie algebras. We use the MAD-groups as the main tool for finding fine group gradings of the complex Lie algebras $A_3 cong D_3$, $B_2 cong C_2$, and $D_2$. Besides, we develop also other methods for finding the fine (group) gradings. They are useful especially for the real forms of the complex algebras, on which they deliver richer results than the MAD-groups. Systematic use is made of the faithful representations of the three Lie algebras by $4 imes 4$ matrices: $A_3 = sl(4,mathbb C)$, $C_2 = sp(4,mathbb C)$, $D_2 = o(4,mathbb C)$. The inclusions $sl(4,mathbb C)supset sp(4,mathbb C)$ and $sl(4,mathbb C) supset o(4,mathbb C)$ are important in our presentation, since they allow to employ one of the methods which considerably simplifies the calculations when finding the fine group gradings of the subalgebras $sp(4,mathbb C)$ and $o(4,mathbb C)$.
Uniqueness of solutions of a generalized Cauchy problem for a system of first order partial functional differential equations
Milena Netka
Opuscula Mathematica , 2009,
Abstract: The paper is concerned with weak solutions of a generalized Cauchy problem for a nonlinear system of first order differential functional equations. A theorem on the uniqueness of a solution is proved. Nonlinear estimates of the Perron type are assumed. A method of integral functional inequalities is used.
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