Institution
University of Warsaw
Education•Warsaw, Poland•
About: University of Warsaw is a education organization based out in Warsaw, Poland. It is known for research contribution in the topics: Population & Large Hadron Collider. The organization has 20832 authors who have published 56617 publications receiving 1185084 citations. The organization is also known as: Uniwersytet Warszawski & Warsaw University.
Papers published on a yearly basis
Papers
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TL;DR: The upper bound of 0.5 n on the maximal number of runs in a string of length n has been shown in this article, and the lower bound is 0.406 n.
Abstract: A run is an inclusion maximal occurrence in a string (as a subinterval) of a repetition v with a period p such that 2p≤|v|. The maximal number of runs in a string of length n has been thoroughly studied, and is known to be between 0.944 n and 1.029 n. In this paper we investigate cubic runs, in which the shortest period p satisfies 3p≤|v|. We show the upper bound of 0.5 n on the maximal number of such runs in a string of length n, and construct an infinite sequence of words over binary alphabet for which the lower bound is 0.406 n.
266 citations
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TL;DR: In this article, the authors presented foreground-reduced cosmic microwave background (CMB) maps derived from the full Planck data set in both temperature and polarization, and compared to the corresponding Planck 2013 temperature sky maps, the total data volume is larger by a factor of 3.
Abstract: We present foreground-reduced cosmic microwave background (CMB) maps derived from the full Planck data set in both temperature and polarization. Compared to the corresponding Planck 2013 temperature sky maps, the total data volume is larger by a factor of 3.2 for frequencies between 30 and 70 GHz, and by 1.9 for frequencies between 100 and 857 GHz. In addition, systematic errors in the forms of temperature-to-polarization leakage, analogue-to-digital conversion uncertainties, and very long time constant errors have been dramatically reduced, to the extent that the cosmological polarization signal may now be robustly recovered on angular scales l ≳ 40. On the very largest scales, instrumental systematic residuals are still non-negligible compared to the expected cosmological signal, and modes with l< 20 are accordingly suppressed in the current polarization maps by high-pass filtering. As in 2013, four different CMB component separation algorithms are applied to these observations, providing a measure of stability with respect to algorithmic and modelling choices. The resulting polarization maps have rms instrumental noise ranging between 0.21 and 0.27μK averaged over 55′ pixels, and between 4.5 and 6.1μK averaged over pixels. The cosmological parameters derived from the analysis of temperature power spectra are in agreement at the 1σ level with the Planck 2015 likelihood. Unresolved mismatches between the noise properties of the data and simulations prevent a satisfactory description of the higher-order statistical properties of the polarization maps. Thus, the primary applications of these polarization maps are those that do not require massive simulations for accurate estimation of uncertainties, for instance estimation of cross-spectra and cross-correlations, or stacking analyses. However, the amplitude of primordial non-Gaussianity is consistent with zero within 2σ for all local, equilateral, and orthogonal configurations of the bispectrum, including for polarization E-modes. Moreover, excellent agreement is found regarding the lensing B-mode power spectrum, both internally among the various component separation codes and with the best-fit Planck 2015 Λ cold dark matter model.
266 citations
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TL;DR: In this paper, a new combined approach for ab initio protein structure prediction is proposed, which combines short-range and long-range knowledge-based potentials derived from a statistical analysis of the regularities of protein structures.
265 citations
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TL;DR: The most plausible explanation for this distinct trend is that the Galactic bulge is a bar whose nearest end lies at positive Galactic longitude as discussed by the authors, which puts a strong constraint on the possible range of the Galactic bar models.
Abstract: The color-magnitude diagrams of ~7 × 105 stars obtained for 12 fields across the Galactic bulge with the Optical Gravitational Lensing Experiment project reveal a well-defined population of bulge red clump giants. We find that the distributions of the apparent magnitudes of the red clump stars are systematically fainter when observing toward lower Galactic l fields. The most plausible explanation for this distinct trend is that the Galactic bulge is a bar whose nearest end lies at positive Galactic longitude. We model this Galactic bar by fitting the observed luminosity functions in the red clump region of the color-magnitude diagram for all fields. We find that, almost regardless of the analytical function used to describe the three-dimensional distribution of stars in the Galactic bar, the resulting models have the major axis inclined to the line of sight from 20° to 30°, with axis ratios corresponding to x0:y0:z0 = 3.5:1.5:1. This puts a strong constraint on the possible range of the Galactic bar models.
265 citations
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TL;DR: For the first time, predictions from pythia8 obtained with tunes based on NLO or NNLO PDFs are shown to reliably describe minimum-bias and underlying-event data with a similar level of agreement to predictions from tunes using LO PDF sets.
Abstract: New sets of CMS underlying-event parameters (“tunes”) are presented for the pythia8 event generator. These tunes use the NNPDF3.1 parton distribution functions (PDFs) at leading (LO), next-to-leading (NLO), or next-to-next-to-leading (NNLO) orders in perturbative quantum chromodynamics, and the strong coupling evolution at LO or NLO. Measurements of charged-particle multiplicity and transverse momentum densities at various hadron collision energies are fit simultaneously to determine the parameters of the tunes. Comparisons of the predictions of the new tunes are provided for observables sensitive to the event shapes at LEP, global underlying event, soft multiparton interactions, and double-parton scattering contributions. In addition, comparisons are made for observables measured in various specific processes, such as multijet, Drell–Yan, and top quark-antiquark pair production including jet substructure observables. The simulation of the underlying event provided by the new tunes is interfaced to a higher-order matrix-element calculation. For the first time, predictions from pythia8 obtained with tunes based on NLO or NNLO PDFs are shown to reliably describe minimum-bias and underlying-event data with a similar level of agreement to predictions from tunes using LO PDF sets.
265 citations
Authors
Showing all 21191 results
Name | H-index | Papers | Citations |
---|---|---|---|
Alexander Malakhov | 139 | 1486 | 99556 |
Emmanuelle Perez | 138 | 1550 | 99016 |
Piotr Zalewski | 135 | 1388 | 89976 |
Krzysztof Doroba | 133 | 1440 | 89029 |
Hector F. DeLuca | 133 | 1303 | 69395 |
Krzysztof M. Gorski | 132 | 380 | 105912 |
Igor Golutvin | 131 | 1282 | 88559 |
Jan Krolikowski | 131 | 1289 | 83994 |
Michal Szleper | 130 | 1238 | 82036 |
Anatoli Zarubin | 129 | 1204 | 86435 |
Malgorzata Kazana | 129 | 1175 | 81106 |
Artur Kalinowski | 129 | 1162 | 81906 |
Predrag Milenovic | 129 | 1185 | 81144 |
Marcin Konecki | 128 | 1178 | 79392 |
Karol Bunkowski | 128 | 1192 | 79455 |