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Search Results: 1 - 10 of 904 matches for " Arsenovi? Milo? "
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On some new theorems on multipliers in harmonic function spaces in higher dimension II
MiloArsenovi,Romi F. Shamoyan
Mathematics , 2011,
Abstract: We present new sharp assertions concerning multipliers in various spaces of harmonic functions in the unit ball of $R^n$
Sharp theorems on multipliers and distances in harmonic function spaces in higher dimension
MiloArsenovi,Romi F. Shamoyan
Mathematics , 2011,
Abstract: We present new sharp results concerning multipliers and distance estimates in various spaces of harmonic functions in the unit ball of $R^n$.
H lder continuity of harmonic quasiconformal mappings
ArsenoviMilo,Manojlovi? Vesna,Vuorinen Matti
Journal of Inequalities and Applications , 2011,
Abstract: We prove that for harmonic quasiconformal mappings α-H lder continuity on the boundary implies α-H lder continuity of the map itself. Our result holds for the class of uniformly perfect bounded domains, in fact we can allow that a portion of the boundary is thin in the sense of capacity. The problem for general bounded domains remains open. MSC 2010: 30C65.
H?lder Continuity of Harmonic Quasiconformal Mappings
MiloArsenovi,Vesna Manojlovi?,Matti Vuorinen
Mathematics , 2010,
Abstract: We prove that for harmonic quasiconformal mappings $\alpha$-H\"older continuity on the boundary implies $\alpha$-H\"older continuity of the map itself. Our result holds for the class of uniformly perfect bounded domains, in fact we can allow that a portion of the boundary is thin in the sense of capacity. The problem for general bounded domains remains open.
Absolute Velocity and Total Stellar Aberration  [PDF]
Milo? ?ojanovi?
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.65090
Abstract: It is generally accepted that stellar annual or secular aberration is attributed to the changes in velocity of the detector. We can say it in a slightly different way. By means of the all known experiments, stellar aberration is directly or indirectly detectable and measurable, only if a detector changes its velocity. Our presumption is that stellar aberration is not caused by the changes in the velocity of the detector. It exists due to the movement of the detector regarding to an absolute inertial frame. Therefore it is just the question of how to choose such a frame. In this paper it is proposed a method to detect and measure instantaneous stellar aberration due to absolute velocity. We can call it an “absolute” stellar aberration. Combining an “annual” and an “absolute” we can define a “total” stellar aberration.
Stellar Distance and Velocity  [PDF]
Milo? ?ojanovi?
Journal of Applied Mathematics and Physics (JAMP) , 2019, DOI: 10.4236/jamp.2019.71016
Abstract: In this paper, a method is presented by which it is possible to determine a distance between the sun and a star as well as a velocity at which the star moves relative to the sun. In order to achieve this, it is sufficient to know three positions of the star and the unit vectors determined by the star and three arbitrarily chosen points that do not lie on a single line. The method has been tested using the data generated by a computer program as well as real data obtained by Gaia mission. In the first case, we found the huge differences comparing the results derived by the method to the results calculated by the traditional parallax method. In the second case also, there are large differences between the obtained and the expected results, but primarily because of the form of the input data, that is not fully suited to the proposed method. Under certain conditions, one would be able to find a velocity at which the sun is moving regarding a stationary coordinate system (K) that will be defined later on.
One-year follow-up of renal function in endemic nephropathy families
Arsenovi? Aleksandra,Bukvi? Danica,?ukanovi? Ljubica
Srpski Arhiv za Celokupno Lekarstvo , 2009, DOI: 10.2298/sarh0902027a
Abstract: Introduction. Endemic nephropathy is familial, chronic tubulointerstitial disease with an insidious onset and asymptomatic, slow progressive course. Objective. The present study was undertaken with the aim to find out whether new persons with renal disorders can be detected among members of endemic families in the village of opi (Kolubara River region, Serbia). Methods. The study involved 44 members of five endemic families without history of renal disorders. Objective survey and laboratory analyzes that enabled determination of kidney functions (creatinine clearance, proteinuria, urine specific gravity and osmolality, fractional sodium excretion (FENa), the rate of tubular phosphate reabsorption (TRP), urine N-acetil-D-glycosaminidase and intestinal alkaline phosphatase) were done in all examined persons three times during the 6-month intervals. Results. At the first examination, hypertension was detected in 23 (52%) person, decreased creatinine clearance in two and proteinuria in 10 persons included in the study. In addition, proteinuria and tubular disorders were detected in 6, hypertension, proteinuria and/or tubular disorders in 9 persons. The analysis of the results obtained by three check-ups undertaken during one year showed that proteinuria and tubular disorders appeared intermittently in half of the examined endemic family members. All persons with detected renal disorders required further examination in order to establish accurate diagnosis of renal disease. Conclusion. Three check-ups performed at six-month intervals in the members of five endemic families detected various renal disorders including renal hypofunction. Regular systematic check-ups of endemic families could enable early detection of the disease and early initiation of measures for slowing down chronic renal disease progression.
Response surface method as a tool for heavy clay firing process optimization: Roofing tiles
Milica Arsenovi,Lato Pezo,Zagorka Radojevi?
Processing and Application of Ceramics , 2012,
Abstract: Heavy clay samples collected in close vicinity of Topli ka Mala Plana, Serbia, were surveyed to examine their possible use in heavy clay industry. The representative raw material, which contained the lowest content of clay minerals and the highest content of carbonates, was enriched with two more plastic clays. Chemical and mineralogical composition, as well as particle size distribution, were determined to distinct the samples. The samples in the form of tiles, hollow blocks and cubes were prepared following the usual practice in ceramic laboratories. The effect of process parameters, such as temperature (850–950 °C) and concentration of the added clays (both in the range of 0–10 wt.%), were investigated in terms of compressive strength, water absorption, firing shrinkage, weight loss during firing and volume mass of cubes. The optimal conditions were determined by the response surface method, coupled with the fuzzy synthetic evaluation algorithm, using membership trapezoidal function, and showed that these materials can be used for roofing tiles production.
A new way of obtaining analytic approximations of Chandrasekhar’s H function
Vukani? Jovan,Arsenovi? Du?an,Davidovi? Dragomir M.
Nuclear Technology and Radiation Protection , 2007, DOI: 10.2298/ntrp0702038v
Abstract: Applying the mean value theorem for definite integrals in the non-linear integral equation for Chandrasekhar’s H function describing conservative isotropic scattering, we have derived a new, simple analytic approximation for it, with a maximal relative error below 2.5%. With this new function as a starting-point, after a single iteration in the corresponding integral equation, we have obtained a new, highly accurate analytic approximation for the H function. As its maximal relative error is below 0.07%, it significantly surpasses the accuracy of other analytic approximations.
Continuous reversal of Hanle resonances of counter-propagating pulse and continuous-wave field
Jelena Dimitrijevi?,Dusan Arsenovi,Branislav M Jelenkovi?
Physics , 2013, DOI: 10.1088/1054-660X/24/1/015201
Abstract: In this work we study propagation dynamics of the two counter-propagating lasers, the continuous-wave (CW) laser and the pulse of another laser, when both lasers are tuned to the $F_{g}=2 \rightarrow F_{e}=1$ transition in $^{87}$Rb, and therefore can develop Hanle electromagnetically induced transparency (EIT) in Rb vapor. We calculate transmission of both lasers as a function of applied magnetic field, and investigate how the propagation of the pulse affects the transmission of the CW laser. And vice versa, we have found conditions when the Gaussian pulse can either pass unchanged, or be significantly absorbed in the vacuum Rb cell. This configuration is therefore suitable for the convenient control of the pulse propagation and the system is of interest for optically switching of the laser pulses. In terms of the corresponding shapes of the coherent Hanle resonances, this is equivalent to turning the coherent resonance from Hanle EIT into electromagnetically induced absorption (EIA) peak. There is the range of intensities of both CW laser and the laser pulse when strong drives of atomic coherences allow two lasers to interact with each other through atomic coherence and can simultaneously reverse signs of Hanle resonances of both.
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