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Search Results: 1 - 10 of 325391 matches for " S. Kulik "
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THE MIDDLE EAST POLICY OF RUSSIA: THE HISTORICAL EXPERIENCE OF 1996-1999 Ближневосточная политика России: исторический опыт 1996-1999 ГГ.
Kulik S. V.
Polythematic Online Scientific Journal of Kuban State Agrarian University , 2012,
Abstract: In this article, we study the changes in the Middle East politics of Russia in the second half of the 1990s
A combined atomic force microscopy and nanoindentation technique to investigate the elastic properties of bone structural units
Hengsberger S.,Kulik A.,Zysset Ph.
European Cells and Materials (ECM) , 2001,
Abstract: To our knowledge, this study applied for the first time a recently developed combination of atomic force microscopy (AFM) and nanoindentation on trabecular and compact bone tissue. The major aim was to check the advantage of the available AFM-mode over the conventionally used optical microscope. First, we investigated if removal of the water content helped to prevent enzymatic degradation of the bone tissue and preserve its mechanical properties during a week. After the positive issue of this test, we quantified the intrinsic mechanical properties of single bone structural units (BSU). Bone specimens were obtained from the femoral neck of an 86 year old female. Four BSU were randomly selected and tested each with 24 indents of 5 mN maximum force. The available AFM mode proved to be a very useful tool for surface characterization and precise selection of the indentation area. The elastic modulus ranged from 18 ± 1.7 GPa for a BSU of compact bone to 22.5 ± 3.1 GPa for a BSU of trabecular bone. Hardness showed values between 0.6 ± 0.11 GPa for compact bone and 1.1 ± 0.17 GPa for trabecular bone. The results suggest that the micromechanics of bone tissue may also be described as an assembly of distinct structural units with rather homogeneous material properties.
Weak convergence of Vervaat and Vervaat Error processes of long-range dependent sequences
Miklós Cs?rg\Ho,Rafa? Kulik
Mathematics , 2007, DOI: 10.1007/s10959-007-0124-8
Abstract: Following Cs\"{o}rg\H{o}, Szyszkowicz and Wang (Ann. Statist. {\bf 34}, (2006), 1013--1044) we consider a long range dependent linear sequence. We prove weak convergence of the uniform Vervaat and the uniform Vervaat error processes, extending their results to distributions with unbounded support and removing normality assumption.
Reduction principles for quantile and Bahadur-Kiefer processes of long-range dependent linear sequences
Miklós Cs?rg?,Rafal Kulik
Mathematics , 2008, DOI: 10.1007/s00440-007-0107-9
Abstract: In this paper we consider quantile and Bahadur-Kiefer processes for long range dependent linear sequences. These processes, unlike in previous studies, are considered on the whole interval $(0,1)$. As it is well-known, quantile processes can have very erratic behavior on the tails. We overcome this problem by considering these processes with appropriate weight functions. In this way we conclude strong approximations that yield some remarkable phenomena that are not shared with i.i.d. sequences, including weak convergence of the Bahadur-Kiefer processes, a different pointwise behavior of the general and uniform Bahadur-Kiefer processes, and a somewhat "strange" behavior of the general quantile process.
On Teleportation in a System of Identical Particles
S. N. Molotkov,S. P. Kulik,S. S. Straupe
Physics , 2010, DOI: 10.1134/S0021364010150130
Abstract: The teleportation of an unknown polarization state of one of the photons in a system of identical particles has been considered. It has been shown that spatial degrees of freedom, which are various directions of the momentum of three photons, are of significant importance for teleportation in the system of identical particles. The inclusion of the spatial degrees of freedom increases the dimension of single-particle state space. In view of this increase, a four-dimensional subspace of two-particle states, which is similar to the state space spanned by the Bell states in a system of two distinguishable qubits, can be separated in the experimental configuration.
Cardio-respiratory fitness and muscular fitness levels of Scottish youth and their associations with physical activity
RHONA MARTIN,DUNCAN S. BUCHAN,KERI S. KULIK,LON KILGORE
Biology of Exercise , 2012,
Abstract: The purpose of this study was to examine the current health status of a sample of Scottish youth in relation to physical fitness. A sample of 76 children aged 10.2 ± 0.56 years had indices of fatness, physical activity, cardio-respiratory fitness and muscular fitness assessed. A high percentage of participants were found to have unhealthy levels of cardio-respiratory fitness and explosive strength (82.9% and 81.6%, respectively). A positive (β = 0.242) although weak (R2 = 0.39) overall relationship was observed between physical activity and cardio-respiratory fitness,though was stronger in the boys than the girls (R2 =0.725 vs. R2 = 0.347). The data suggests that interventions improving physical activity participation, weight status and physical fitness are essential prior to adolescence in order to improve health and well-being.
Strong approximations for long memory sequences based partial sums, counting and their Vervaat processes
Endre Csáki,Miklós Cs?rg?,Rafal Kulik
Mathematics , 2013,
Abstract: We study the asymptotic behaviour of partial sums of long range dependent random variables and that of their counting process, together with an appropriately normalized integral process of the sum of these two processes, the so-called Vervaat process. The first two of these processes are approximated by an appropriately constructed fractional Brownian motion, while the Vervaat process in turn is approximated by the square of the same fractional Brownian motion.
Bahadur--Kiefer theory for sample quantiles of weakly dependent linear processes
Rafa? Kulik
Mathematics , 2006, DOI: 10.3150/07-BEJ6086
Abstract: In this paper, we establish the Bahadur--Kiefer representation for sample quantiles for a class of weakly dependent linear processes. The rate of approximation is the same as for i.i.d. sequences and is thus optimal.
Optimal rates in the Bahadur-Kiefer representation for GARCH sequences
Rafal Kulik
Mathematics , 2006,
Abstract: In this paper we establish the Bahadur-Kiefer representation for sample quantiles of GARCH sequences with optimal rates.
Sums of extreme values of subordinated long-range dependent sequences: moving averages with finite variance
Rafal Kulik
Mathematics , 2006,
Abstract: In this paper we characterize the limiting behavior of sums of extreme values of long range dependent sequences defined as functionals of linear processes with finite variance. The extremal sums behave completely different by compared to the i.i.d case. In particular, though we still have asymptotic normality, the scaling factor is relatively bigger than in the i.i.d case, meaning that the maximal terms have relatively smaller contribution to the whole sum. Also, the scaling need not depend on the tail index of the underlying marginal distribution, as it is well-known to be so in the i.i.d. situation. Furthermore, subordination may completely change the asymptotic properties of sums of extremes.
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