B0943+10: low-frequency study of subpulse periodicity in the Bright mode with LOFAR

We use broadband sensitive LOFAR observations in the 25-80 MHz frequency range to study the single-pulse emission properties of the mode-switching pulsar B0943+10. We review the derivation of magnetospheric geometry, originally based on low-frequency radio data, and show that the geometry is less constrained than previously thought. This may be used to help explain the large fractional amplitudes of the observed thermal X-ray pulsations from the polar cap, which contradict the almost aligned rotator model of PSR B0943+10. We analyse the properties of drifting subpulses in the Bright mode and report on the minutes-long variations of the drift period. We searched for the periodic amplitude modulation of drifting subpulses, which is a vital argument for constraining several important system parameters: the degree of aliasing, the orientation of the line-of-sight vector with respect to magnetic and spin axes, the angular velocity of the carousel, and thus, the gradient of the accelerating potential in the polar gap. The periodic amplitude modulation was not detected, indicating that it may be a rare or narrow-band phenomenon. Based on our non-detection and review of available literature, we chose to leave the aliasing order unconstrained and derived the number of sparks under different assumptions about the aliasing order and geometry angles. Contrary to the previous findings, we did not find a large (of the order of 10%) gradual variation of the separation between subpulses throughout Bright mode. We speculate that this large variation may be due to the incorrect accounting for the curvature of the line of sight within the on-pulse window. Finally, we report on the frequency-dependent drift phase delay, which is similar to the delay reported previously for PSR B0809+74. We provide a quantitative explanation of the observed frequency-dependent drift phase delay within the carousel model.Comment: updated to match the accepted version (A&A); added polarisation discussion and language correction

Slangisms as the Means of Conveying the Author’s and Character’s Figurative Information in some Countrys of the Danube Region: Translation Aspect

Slang as a term is used in two ways: either as a synonym for jargon, or as the whole stock of the jargon words and jargon meaning of the neutral lexis, jargon expressions etymologically belonging to various jargons, so that they get commonly used or understandable at least to a wide circle of certain language speakers. Slangisms of the general slang as well as ‘low’ colloquial words (two lexical layers which have a blurred distinction between them) comprise the constituent of the common national word-stock called by the researchers an ‘expressive vernacular’. This constituent belongs to stylistically low constructs of the literary standard. It has a status of the functional and stylistic category which is defined by a certain amount of stylistic means of the colloquial variation of the national literary standard. Also it occupies the mid-position between literary standard word-stock and non-literary manifestations of the language

There is No 2-(22,8,4) Block Design

In this paper we show that a 2-(22, 8, 4) design does not exist. This result was obtained by a computer search

The electric quadrupole channel of the 7.8 eV 229Th~^{229}\mathrm{Th} transition

The unique isomeric transition at 7.8 eV in $~^{229}\mathrm{Th}$ has a magnetic dipole ($M1$) and an electric quadrupole ($E2$) multipole mixing. So far, the $E2$ component has been widely disregarded. Here, we investigate the nuclear physics nature and the impact of the $E2$ decay channel for the nuclear coupling to the atomic shell based on the newest theoretical predictions for the corresponding reduced nuclear transition probabilities. Our results show that the contribution of the $E2$ channel is dominant or at least of the same order of magnitude for internal conversion or electronic bridge transitions involving the atomic orbitals $7p$, $6d$ and $5f$. Notable exceptions are the internal conversion of the $7s$ electron and the electronic bridge between the electronic states $7s$ and $7p$, for which the $M1$ component dominates by two to three orders of magnitude. Caution is therefore advised when considering isomeric excitation or decay via nuclear coupling to the atomic shell, as the involved orbitals determine which multipole transition component dominates

Models of innovation process in knowledge economy: implications for innovation policy in Ukraine

http://vsed.oneu.edu.uaThe article analyses modern Ukrainian discussion on innovation and innovation policy and proves that that in domestic literature still prevails linear model of innovation, which is wrong in the knowledge-based economy. Evolution of knowledge economy and National Innovation System concepts are considered. The models of innovation process in knowledge economy are presented. The author argues that modern innovation policy is worked out on the basis of a narrow definition of innovation system and is focused is on science based innovation. Basic Ukrainian legislation on innovation policy and NIS is analyzed, necessary measures to build effective innovation environment are proposed