1,781 research outputs found
Neuronal mechanisms mediating the variability of somatosensory evoked potentials during sleep oscillations in cats
No full textThe slow oscillation (SO) generated within the corticothalamic system is composed of active and silent states. The studies of response variability during active versus silent network states within thalamocortical system of human and animals provided inconsistent results. To investigate this inconsistency, we used electrophysiological recordings from the main structures of the somatosensory system in anaesthetized cats. Stimulation of the median nerve (MN) elicited cortical responses during all phases of SO. Cortical responses to stimulation of the medial lemniscus (ML) were virtually absent during silent periods. At the ventral-posterior lateral (VPL) level, ML stimuli elicited either EPSPs in isolation or EPSPs crowned by spikes, as a function of membrane potential. Response to MN stimuli elicited compound synaptic responses and spiked at any physiological level of membrane potential. The responses of dorsal column nuclei neurones to MN stimuli were of similar latency, but the latencies of antidromic responses to ML stimuli were variable. Thus, the variable conductance velocity of ascending prethalamic axons was the most likely cause of the barrages of synaptic events in VPL neurones mediating their firing at different level of the membrane potential. We conclude that the preserved ability of the somatosensory system to transmit the peripheral stimuli to the cerebral cortex during all the phases of sleep slow oscillation is based on the functional properties of the medial lemniscus and on the intrinsic properties of the thalamocortical cells. However the reduced firing ability of the cortical neurones during the silent state may contribute to impair sensory processing during sleep
Mit Horoskopen Deutsch lernen! Spracharbeit mit populären Kleintexten
No full textKöster L. Mit Horoskopen Deutsch lernen! Spracharbeit mit populären Kleintexten. In: Timofeev AM, ed. Kul’turnyj kontekst v professional’nom obrazovanii i mežkul’turnoj kommunikacii: materialy meždunarodnoj konferencii 15-17 sentjabrja 2005 goda. Velikij Novgorod; 2006: 104-112
Effective strain gradient continuum model of metamaterials and size effects analysis
No full textIn this paper, a strain gradient continuum model for a metamaterial with a periodic lattice substructure is considered. A second gradient constitutive law is postulated at the macroscopic level. The effective classical and strain gradient stiffness tensors are obtained based on asymptotic homogenization techniques using the equivalence of energy at the macro- and microscales within a so-called representative volume element. Numerical studies by means of finite element analysis were performed to investigate the effects of changing volume ratio and characteristic length for a single unit cell of the metamaterial as well as changing properties of the underlying material. It is also shown that the size effects occurring in a cantilever beam made of a periodic metamaterial can be captured with appropriate accuracy by using the identified effective stiffness tensors
Dynamics of the quantity of agronomically valuable groups of microorganisms during cultivation of maize on sod–podzolic light–clay soil
No full textThe paper considers the effect of biofertilizers (PolyFunKur and Agromik) on agronomically valuable groups of microorganisms in order to determine their quantity depending on the phenol phases of maize.
Methods: phenological, agrochemical, microbiological.
Studies were carried out on sod–podzolic light–clay soil. The studies of the quantity of agronomically valuable groups of microorganisms with PolyFunKur in the tillering phase revealed that eight of nine groups had increased their quantity from 0.3 to 1.8 times over the control; only cellulose–destroying aerobic microorganisms had decreased their quantity in 3.5 times under the control. Most of the groups of microorganisms increased their quantity over the control in case of Agromik as well. The total amount of microorganisms assimilating mineral nitrogen was almost equal in both tests. As in the tillering phase, in the beginning of flowering phase, eight of nine groups had increased their quantity over the control in case PolyFunKur test. In the case of Agromik, the quantity of micromycetes and spore ammonifiers in the control was higher while the quantity of cellulose–destroying aerobic bacteria was almost the same in the tillering phase; and was higher by more than 27 times than in PolyFunKur test in the beginning of the flowering phase. The quantity of all the studied agronomically valuable groups of microorganisms in PolyFunKur test was higher than in the control and in the Agromik test in the cob-forming phase
Techniques for Portraying a Main Character in Yakut Epic: Investigating Olonkho Texts of Nyurgun Bootur the Swift by P. Oyunsky and Kulun Kullustuur the Obstinate by I. Timofeev-Teploukhov
No full textIntroduction. The article examines Yakut heroic olonkho epics — Nyurgun Bootur the Swift by P. Oyunsky and Kulun Kullustuur the Obstinate by I. Timofeev-Teploukhov — for techniques employed to create portraits of main characters. According to N. Yemelyanov, the olonkho Kulun Kullustuur the Obstinate recorded from taleteller I. Timofeev-Teploukhov clusters with earliest patterns of archaic epic, while that of Yakut writer P. Oyunsky (Nyurgun Bootur the Swift) is the first literary adaptation of olonkho texts. The study attempts an insight into how and which particular portrayal techniques were used by P. Oyunsky and I. Timofeev-Teploukhov to depict main characters of theirs. The comparative approach to the narratives recorded in different periods shall make it possible to trace the use of portrayal techniques, which shall underline the unique artistic features characterizing each of the taletellers, and show how such portrayal patterns developed to gain deeper associative essentials in further olonkho texts. Goals. The study aims to identify some distinct features inherent to the techniques of creating main characters’ portraits in the olonkhos Nyurgun Bootur the Swift and Kulun Kullustuur the Obstinate, and outline ethnic specifics in portrayal characteristics. To facilitate this, the paper shall classify portrayals, articulate types of techniques and their functions in portraying a main character, identify stable formulas employed to depict heroes, determine specific features of portrayal as a key technique for the making of an epic hero. The work reviews the existing types of epic portraits, their functions and attributes, examines some visual means serving to unveil the images of main characters. Results. The study attests to the examined narratives are characterized by an increased stability of depictive portrayals with peripheral parts (artistic and emotional epithets) tending to vary. Each such depictive portrayal proves multifunctional, semantically wide, and technically relevant. The descriptions of the heroes’ appearances are somewhat idealized and rich in comparisons, repetitions, evaluative epithets. Portrayal agendas of P. Oyunsky vary through history and depend on actual artistic methods and style employed by the author who pays special attention to fictional details depicted in the context of folk traditions. The study of the techniques helps identify which innovative tools P. Oyunsky used when he was creating his Nyurgun Bootur the Swift
(Table 10) Composition of organic matter in sedimentary rocks from DSDP Leg 62 holes
No full text(Table 10) Composition of organic matter in sedimentary rocks from DSDP Leg 62 hole
Astronomy Letters, V. 29, I. 10
No full textAstronomy Letters -- October 2003
Volume 29, Issue 10, pp. 641-711
The Star-Forming Region in Orion KL
L. I. Matveyenko, K. M. Zakharin, P. J. Diamond, and D. A. Graham
pp. 641-643 Full Text: PDF (190 kB)
RXTE Observations of the Strongly Absorbed Sources IGR J16318–4848 and IGR J16358–4726
M. G. Revnivtsev
pp. 644-648 Full Text: PDF (164 kB)
A Massive Circumstellar Envelope around the Type-IIn Supernova SN 1995G
N. N. Chugai and I. J. Danziger
pp. 649-657 Full Text: PDF (189 kB)
Diffusive Propagation of Fast Particles in the Presence of a Moving Shock Wave
I. S. Petukhov, S. I. Petukhov, S. A. Starodubtsev, and V. E. Timofeev
pp. 658-666 Full Text: PDF (365 kB)
Highly Accurate Determination of the Coordinates and the Earth's Rotation Parameters Involving the Svetloe VLBI Observatory
A. M. Finkelstein, A. V. Ipatov, S. G. Smolentsev, V. G. Grachev, I. A. Rakhimov, and Z. M. Malkin
pp. 667-673 Full Text: PDF (342 kB)
Models and Theoretical Spectrum for the Free Oscillations of Saturn
T. V. Gudkova and V. N. Zharkov
pp. 674-694 Full Text: PDF (474 kB)
Orbital Evolution of New Distant Neptunian Satellites and omega-Librators in the Satellite Systems of Saturn and Jupiter
M. A. Vashkov'yak
pp. 695-703 Full Text: PDF (694 kB)
Periodic Solutions Near a Central Libration Point in the Problem of the Motion of a Star inside an Elliptical Galaxy
S. A. Gasanov
pp. 704-711 Full Text: PDF (188 kB)Archived web conten
Plasma Physics Reports V. 27, I. 11
No full textPlasma Physics Reports -- November 2001
Volume 27, Issue 11, pp. 907-1000
MAGNETIC CONFINEMENT SYSTEMS
Plasma Convection near the Threshold for MHD Instability in Nonparaxial Magnetic Confinement Systems
V. P. Pastukhov and N. V. Chudin
pp. 907-921 Full Text: PDF (502 kB)
PLASMA OSCILLATIONS AND WAVES
Electromagnetic Oscillations near the Critical Surface in a Plasma: Methodological Note
A. V. Timofeev
pp. 922-931 Full Text: PDF (120 kB)
Distribution of the Absorbed ECRH Power among the Electrons in a Plasma Heated by an Extraordinary Wave
V. L. Erukhimov and V. E. Semenov
pp. 932-937 Full Text: PDF (76 kB)
PLASMA KINETICS
Reduced Models of the Dynamics of Light Impurity Stripping
V. I. Gervids, V. I. Kogan, and D. Kh. Morozov
pp. 938-946 Full Text: PDF (100 kB)
PLASMA DYNAMICS
Generation of K-shell Radiation in a Double Shell Plasma Liner with a Microsecond Current Generator
S. A. Chaikovsky and S. A. Sorokin
pp. 947-952 Full Text: PDF (157 kB)
Current Sheets Formed by Alfvén and Magnetosonic Pulses in the Vicinity of the Null Line of the Magnetic Field
G. I. Dudnikova and V. P. Zhukov
pp. 953-962 Full Text: PDF (171 kB)
K-shell Radiation from Double-Shell Argon Plasma Liners
S. A. Sorokin
pp. 963-966 Full Text: PDF (52 kB)
BEAMS IN PLASMA
Laser Radiation Guiding in a Plasma Channel Created by a Relativistic Electron Beam
A. G. Khachatryan
pp. 967-970 Full Text: PDF (58 kB)
PLASMA DIAGNOSTICS
Small-Angle Scattering of an Extraordinary Wave near the Upper Hybrid Resonance
E. Z. Gusakov and A. V. Surkov
pp. 971-978 Full Text: PDF (100 kB)
LOW-TEMPERATURE PLASMA
Current Dynamics and Mechanisms for the Instability of a Non-Self-Sustained Glow Discharge in Nitrogen
Yu. A. Mankelevich, A. F. Pal', N. A. Popov, T. V. Rakhimova, and A. V. Filippov
pp. 979-989 Full Text: PDF (295 kB)
BRIEF COMMUNICATIONS
Escape of Electron Langmuir Waves from a Magnetized Plasma
A. V. Timofeev
pp. 990-993 Full Text: PDF (53 kB)
Effect of the Radial Electric Field on the Results of Measurements of the Poloidal Rotation of a Tokamak Plasma by Charge Exchange Recombination Spectroscopy
A. N. Romannikov and A. P. Chernobai
pp. 994-996 Full Text: PDF (40 kB)
Dielectric Permittivity of a Plasma in an External Electric Field
V. A. Schweigert[dagger]
pp. 997-999 Full Text: PDF (45 kB)
OBITUARY
In Memory of Vitaly Adol'fovich Schweigert (August 30, 1955–April 3, 2001)
p. 1000 Full Text: PDF (51 kB)Archived web conten
Maria Conca & Josep Guia (2014), La fraseologia. Principis, mètode i aplicacions, Alzira, Bromera / IIFV, 216 pp. ISBN: 978-84-902-6281-8.
No full textRessenya de Maria Conca & Josep Guia (2014), La fraseologia. Principis, mètode i aplicacions, Alzira, Bromera / IIFV, 216 pp. ISBN: 978-84-902-6281-8
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