5 research outputs found
REPRODUCTIVE ATTITUDES AMONG STUDENTS (ACCORDING TO THE DATA OF SOCIOLOGICAL SURVEY)
No full textThe study of reproductive behavior is one of the most important subjects of demographic research. Research of reproductive intentions most often is performed among young people: young families and students. The paper gives the results of sociological survey conducted by the author among the students of Moscow State University. Average values of children among students higher than average values of children among all population. Also, higher values of children are observed among a part of students, who are married or planning to get married atan early age, and a part of students who have three or more children in parent families. Also regularities of employment and evaluation of the demographic situation in the country with values of children are traced. The obtained results correlate with the results of similar sociological surveys among students
NEW ASPECTS OF THE INTRACAVITY LASER ABSORPTION SPECTROSCOPY
No full textAuthor Institution: Laboratoire de Spectrom\'{e}trie Physique, Universit\'{e} J. Fourier/CNRS/GrenobleIntracavity laser absorption spectroscopy (ICLAS) is now a well established direct multiplex absorption method with a high sensitivity. This phenomena was discovered about 25 years ago [?, ?]. ICLAS is based on the high sensitivity of a broadband laser to intracavity frequency dependent losses: broadband intracavity losses are compensated by the laser gain whereas for narrow lines, the laser operates like a multipass cell without reflection losses. Equivalent absorption path lengths of several hundred of kilometers may be reached. Since the discovery of this effect, ICLAS has been used with success for the spectroscopy of very weak transitions mainly with dye, color center or ND:glass lasers [?]. The new class of solid state laser is highly promissing for the development of a new type of highly sensitive spectrometer in the infrared or near infrared[?]. We will give an overview about the principle of this technique and about recent applications like spectroscopy with an intracavity supersonic jet, with high resolution... We also will examine the possibilities to use this powerfull technique for measurements of weak concentrations of trace gas with an all solid state ICLAS spectrometer for in-situ detection. [1]L. A. PAKHOMYCHEVA, E.A. SVIRIDENKOV. A.F. SUCHKOV, L.V. TITOVA and S.S. CHURILOV, JETP Lett., 12, 43, (1970). [2]N. C. PETERSON, M.J. KURYLOV, W. BRAUN, A.M. BASS AND R. KELLER. J. Opt. Soc Am. 61, 746, (1971). [3]P. E. TOSCHEK, V. M. BAVE, Losers, spectroscopy and new idears, ed. W.H YEN, M.D. LEVENSON Springer verlag, 1987.[4]A. KACHANOV, A. CHARWAT and F. STOECKEL. J. Opt. Soc. Am. B. 11, 2412, (1995) and 12, 970, (1995.xsxs
Combined inclusive diffractive cross sections measured with forward proton spectrometers in deep inelastic ep scattering at HERA
No full textA combination of the inclusive diffractive cross section measurements made by the H1 and ZEUS Collaborations at HERA is presented. The analysis uses samples of diffractive deep inelastic ep scattering data at a centre-of-mass energy √s= 318 Gev where leading protons are detected by dedicated spectrometers. Correlations of systematic uncertainties are taken into account, resulting in an improved precision of the cross section measurement which reaches 6 % for the most precise points. The combined data cover the range 2.5 < Q 2 < 200 GeV 2 in photon virtuality, 0.00035 < xP < 0.09 in proton fractional momentum loss, 0.09 <{pipe}t{pipe}< 0.55 GeV 2 in squared four-momentum transfer at the proton vertex and 0.0018 < β <0.816 in β=x/xP, where x is the Bjorken scaling variable. © 2012 The Author(s).0H1 and ZEUS CollaborationsSCOPUS: ar.jinfo:eu-repo/semantics/publishe
Measurement of high-Q (2) charged current deep inelastic scattering cross sections with a longitudinally polarised positron beam at HERA
No full textMeasurements of the cross sections for charged current deep inelastic scattering in e+p collisions with a longitudinally polarised positron beam are presented. The measurements are based on a data sample with an integrated luminosity of 132 pb-1 collected with the ZEUS detector at HERA at a centre-of-mass energy of 318 GeV. The total cross section is presented at positive and negative values of the longitudinal polarisation of the positron beams. The single-differential cross-sections dσ/dQ2, dσ/dx and dσ/dy are presented for Q2>200 GeV2. The reduced cross-section σ̃ is presented in the kinematic range 200<Q2<60000 GeV2 and 0.006<x<0.562. The measurements agree well with the predictions of the Standard Model. The results are used to determine a lower limit on the mass of a hypothetical right-handed W boson. © 2010 The Author(s)
Pedestal particle balance studies in JET-ILW H-mode plasmas
No full textJET-ILW type I ELMy H-modes at 2.5 MA/2.8 T with constant NBI heating (23 MW) and gas fuelling rate were performed, utilising edge localised mode (ELM) pacing by vertical kicks and plasma shaping (triangularity, delta) as tools to disentangle the effects of ELMs, inter-ELM transport and edge stability on the pedestal particle balance. In agreement with previous studies, the pedestal confinement improves with increasing delta, mostly due to a significant increase in pedestal density while the ELM frequency (fELM) is decreased. Improved pedestal confinement with increasing delta was observed even when the pedestal MHD stability was degraded artificially by vertical kicks, implying that increased triangularity may favourably affect the inter-ELM pedestal recovery. The workflow developed to quantify the pedestal particle balance uses high time-resolution profile reflectometry to characterise the inter-ELM evolution of the plasma particle content (dN/dt), the NEO drift-kinetic solver to evaluate the neoclassical fluxes and interpretative EDGE2D-EIRENE simulations to estimate the edge particle source. The edge particle source is then constrained by deuterium Balmer-alpha line intensity measurements in the main chamber, which are, however, strongly affected by reflections from the metal walls. The reflections are accounted for by the CHERAB code taking the divertor emission (the brightest light source in the torus) distribution from imaging spectroscopy measurements as input. Our analysis shows that in the second half of the ELM cycle, the volume-integrated particle source is larger than dN/dt, indicating that transport plays a key role in the inter-ELM pedestal recovery
