10,849 research outputs found
Strange and charged particle elliptic flow in Pb+Au collisions at 158 AGeV/c
We present and elliptic flow measurements from Pb+Au
collisions at the highest SPS energy. The data, collected by the CERES
experiment which covers with full azimuthal coverage and wide
sensitivity up to 3.5 GeV/c, can be used to test hydrodynamical models
and show sensitivity to the EoS. The value of as a function of
centrality and is presented. Values of observed by STAR at RHIC
are larger by about 1/3. Our measurements are compared to results from other
SPS experiments and to hydrodynamical calculations. Huge statistics allows for
a precise measurement of the differential pion elliptic flow.Comment: Proceeding for Quark Matter 2005, parallel talk, 4 pages, 7 figure
Strange Particle Production and Elliptic Flow from CERES
Elliptic flow measurements as a function of p_T of charged (pi^+- and low-p_T
protons) and strange (Lambda and K^0_S) particles from Pb+Au collisions at 158
AGeV/c are presented, together with measurements of phi and K^0_S meson
production. A mass ordering effect was observed. Scaling to the number of
constituent quarks and transverse rapidity y^fs_T scaling are presented. The
results are compared with results from the NA49 and STAR experiments and with
hydrodynamical calculations. For the first time in heavy-ion collisions, phi
mesons were reconstructed in the same experiment both in the K^+K^- and in the
e^+e^- decay channels. The obtained transverse mass distributions of phi mesons
are compared with results from the NA49 and NA50 experiments. The yield and the
inverse slope parameter of the K^0_S mesons were reconstructed from two
independent analyses. Our results are compared with those from the NA49 and
NA57 experiments.Comment: Submitted to J. Phys. G (Proceedings of the 9th International
Conference on Strangeness in Quark Matter, Los Angeles, USA, March 26-31) 9
pages, 7 figure
Taksonomija ucnih metod in oblik za mlade v neformalnem izobrazevanju v Mladinskem svetu Slovenije
Research from the field of non-formal education (NFE) in youth work emphasises the central role of experiential learning and learning in groups. The present paper aims to research teaching methods and teaching forms in NFE in youth work. The research sought to answer the following research questions: ‘What teaching forms can be found in NFE for young people in youth councils on a national level in Slovenia?’ and ‘What teaching methods can be found in NFE for young people in youth councils on a national level in Slovenia?’ Data was collected using semi-structured interviews; the instrument was a list of questions. The empirical research was conducted in July 2016 with six interviewees. The results indicate that learning in selected NFE in the National Youth Council of Slovenia (MSS) is participatory, interactive, inclusive and student-focused; with central concepts of experiential learning and learning in groups. The key teaching form is learning in groups. However, individual work, work in pairs, programmed instruction and direct instruction are also present. The central and omnipresent teaching method is experiential learning. Problem-based learning, case-study method, action learning, and project-based learning are intertwined and connected to the experiential learning method. Other methods include verbal-textual methods, illustrative-demonstration methods, experimental methods, peer learning, and support methods. The conclusions are applicative in the didactic spectrum of NFE in youth work and in the wider didactic spectrum of adult learning. Implications for further research include teaching methods and forms in NFE inside the wider youth sector, internationally comparative and through quantitative research. (DIPF/Orig.
A more determined, if not coherent policy? Republic of Serbia and contribution to multinational peace support operations in 2011
Optimal State Estimation with Measurements Corrupted by Laplace Noise
Optimal state estimation for linear discrete-time systems is considered.
Motivated by the literature on differential privacy, the measurements are
assumed to be corrupted by Laplace noise. The optimal least mean square error
estimate of the state is approximated using a randomized method. The method
relies on that the Laplace noise can be rewritten as Gaussian noise scaled by
Rayleigh random variable. The probability of the event that the distance
between the approximation and the best estimate is smaller than a constant is
determined as function of the number of parallel Kalman filters that is used in
the randomized method. This estimator is then compared with the optimal linear
estimator, the maximum a posteriori (MAP) estimate of the state, and the
particle filter
The interaction between a superconducting vortex and an out-of-plane magnetized ferromagnetic disk: influence of the magnet geometry
The interaction between a superconducting vortex in a type II superconducting
film (SC) and a ferromagnet (FM) with out-of-plane magnetization is
investigated theoretically within the London approximation. The dependence of
the interaction energy on the FM-vortex distance, film thickness and different
geometries of the magnetic structures: disk, annulus(ring), square and triangle
are calculated. Analytic expressions and vectorplots of the current induced in
the SC due to the presence of the FM are presented. For a FM disk with a
cavity, we show that different local minima for the vortex position are
possible, enabling the system to be suitable to act as a qubit. For FMs with
sharp edges, like e.g. for squares and triangles, the vortex prefers to enter
its equilibrium position along the corners of the magnet.Comment: Preprint, 10 pages, 10 figures, submitted to Phys. Rev.
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