147 research outputs found

    Deflected mode algorithm of thin conical shell in the cases of one-way and two-way connection between the shell and elastic foundation

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    Наведено алгоритм визначення напружено-деформованого стану тонкої конічної оболонки, яка розташована на пружній основі. Між конічною оболонкою та основою може бути як двобічна, так і однобічна в’язі . Ця задача розв’язується за допомогою метода скінченних елементів. У випадку однобічної в’язі переміщення конічної оболонки визначаються за допомогою метода послідовних наближень. За представленим алгоритмом була розроблена програма, на основі якої було виконано багато різноманітних розрахунків.The deflected mode algorithm of thin conical shell in the cases of one-way and two-way connection between the shell and elastic foundation is considered. Two-way or one-way connection between shell and the foundation there can be. This problem is solved by finite element method. Shell displacements are defined by serial approximations in case one-way connection. On the algorithm the program has been created. With its help many calculations have been made

    Strata matter formation model

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    Using the model developed in the paper, the process of genesis in depths of the planet of all chemical elements given in the Periodic Mendeleev's system is presented. Formation of nuclei and atoms occurs according to the elementary reactions of the interaction of electrons, neutrinos and protons entering the subsoil with high-energy cosmic streams and as a result of high-temperature dissociation of water descending into the depths of the planet under the action of gravity. Matter synthesis goes on the principle of a simple chemical element to the complex. It is mathematically expressed in terms of the relative time of formation of any chemical element of the Periodic System in hydrogen. This time indirectly indicates the prevalence of a chemical element in nature. Formation of chemical elements occurs with the release of a large amount of thermal energy, which heats the magma, moving it to the sides with a lower energy level. Getting into areas with a lower energy level, atoms of chemical elements interact with each other and form various molecular compounds according to chemical reactions. Moving magma affects the crust of the planet. As a result, cracks and faults are formed in thin places of the crust. Chemical elements and molecular compounds rise to the surface under the action of high pressure and temperature. Massive chemical elements and heavy substances are deposited in deeper layers of the earth's crust or carried to the surface with magma. Light matter such as hydrocarbons reaches the surface through cracks and fractures. Oil is formed from condensed hydrocarbons; gas is formed from uncondensed ones. When they enter geological confined spaces, they form new or fill the known formations and field being developed. If there are no closed cavities in the way of hydrocarbons, then hydrocarbons appear on the surface as emissions from faults and mud volcanoes. The model reflects reverse processes such as dissociation of chemical elements into protons, electrons and electrons. During the dissociation, energy is absorbed; a local compression of the magma occurs. Expansion of magma during the formation of chemical elements and its contraction during their dissociation cause low and high frequency pulsations of the planet, during which excess energy is discharged into space. It is indicated that initially all chemicals, including water, were formed in the mantle from high-energy particles such as protons, electrons and neutrinos emitted by the sun and space. It means that our planet is the product of protons, electrons and neutrinos. The main provisions of the developed model are confirmed by results of experimental studies of similar processes and results of geological and geophysical studies in the Black and Caspian Seas, on sea and ocean shelves as well as on the Kolskaya ultradeep well. This allowed to assert that the developed model has a fairly high degree of reliability

    Photovaractor performance for optically controlled microwave circuits, Journal of Telecommunications and Information Technology, 2002, nr 1

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    The photovaractor for optically controlled microwave circuits was designed and studied. The photovaractor module was fabricated as a planar p-i-n photodiode chip placed in a fibre optic matching receptacles. Study of C-V characteristics in the light illumination mode has shown that capacitance characteristics are strongly dependent on the light illumination power. These variations of the photovaractor diode capacitance are large enough to be used in optically controlled circuits such as oscillators, mixers and switchers

    Long-range angular correlations on the near and away side in p–Pb collisions at

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    Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV

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    Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 2GeV/c. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B. V.Peer reviewe

    Azimuthal anisotropy of charged jet production in root s(NN)=2.76 TeV Pb-Pb collisions

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    We present measurements of the azimuthal dependence of charged jet production in central and semi-central root s(NN) = 2.76 TeV Pb-Pb collisions with respect to the second harmonic event plane, quantified as nu(ch)(2) (jet). Jet finding is performed employing the anti-k(T) algorithm with a resolution parameter R = 0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero nu(ch)(2) (jet) is observed in semi-central collisions (30-50% centrality) for 20 <p(T)(ch) (jet) <90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the nu(2) of single charged particles at high p(T). Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe

    Event-shape engineering for inclusive spectra and elliptic flow in Pb-Pb collisions at root(NN)-N-S=2.76 TeV

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    Pseudorapidity and transverse-momentum distributions of charged particles in proton-proton collisions at root s=13 TeV

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    The pseudorapidity (eta) and transverse-momentum (p(T)) distributions of charged particles produced in proton-proton collisions are measured at the centre-of-mass energy root s = 13 TeV. The pseudorapidity distribution in vertical bar eta vertical bar <1.8 is reported for inelastic events and for events with at least one charged particle in vertical bar eta vertical bar <1. The pseudorapidity density of charged particles produced in the pseudorapidity region vertical bar eta vertical bar <0.5 is 5.31 +/- 0.18 and 6.46 +/- 0.19 for the two event classes, respectively. The transverse-momentum distribution of charged particles is measured in the range 0.15 <p(T) <20 GeV/c and vertical bar eta vertical bar <0.8 for events with at least one charged particle in vertical bar eta vertical bar <1. The evolution of the transverse momentum spectra of charged particles is also investigated as a function of event multiplicity. The results are compared with calculations from PYTHIA and EPOS Monte Carlo generators. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe

    Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV

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    The elliptic flow, v(2), of muons from heavy-flavour hadron decays at forward rapidity (2.5 <y <4) is measured in Pb-Pb collisions at root s(NN)= 2.76TeVwith the ALICE detector at the LHC. The scalar product, two- and four-particle Q cumulants and Lee-Yang zeros methods are used. The dependence of the v(2) of muons from heavy-flavour hadron decays on the collision centrality, in the range 0-40%, and on transverse momentum, p(T), is studied in the interval 3 <p(T)<10 GeV/c. A positive v(2) is observed with the scalar product and two-particle Q cumulants in semi-central collisions (10-20% and 20-40% centrality classes) for the p(T) interval from 3 to about 5GeV/c with a significance larger than 3 sigma, based on the combination of statistical and systematic uncertainties. The v(2) magnitude tends to decrease towards more central collisions and with increasing pT. It becomes compatible with zero in the interval 6 <p(T)<10 GeV/c. The results are compared to models describing the interaction of heavy quarks and open heavy-flavour hadrons with the high-density medium formed in high-energy heavy-ion collisions. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V.Peer reviewe

    Measurement of charged jet production cross sections and nuclear modification in p-Pb collisions at root s(NN)=5.02 TeV

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    Charged jet production cross sections in p-Pb collisions at root s(NN) = 5.02 TeV measured with the ALICE detector at the LHC are presented. Using the anti-k(T) algorithm, jets have been reconstructed in the central rapidity region from charged particles with resolution parameters R = 0.2 and R = 0.4. The reconstructed jets have been corrected for detector effects and the underlying event background. To calculate the nuclear modification factor, R-pPb, of charged jets in p-Pb collisions, a pp reference was constructed by scaling previously measured charged jet spectra at root s = 7 TeV. In the transverse momentum range 20Peer reviewe
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