252 research outputs found

    THE SERVICE β€œVPUTI” IS TO SEARCH YOUR FELLOW TRAVELERS AND FREINDS

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    Theoretical and experimental investigation of the destruction of graphites in a flow of dissociated air

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    A method is presented for calculating the heating and erosion of blunt bodies made of graphite in a high-enthalpy flow of dissociated air, assuming chemical equilibrium on the surface and taking account of the thermal effects of combustion and sublimation of graphite. The analysis involves the use of a finite difference scheme to solve an equation of unsteady heat conduction. Attention is given to the equilibrium vaporization of C, C2 and C3 molecules. The calculations agree well with experimental data for a wide range of temperatures and stagnation pressures

    Евразийский Π²Π΅ΠΊΡ‚ΠΎΡ€ внСшнСй ΠΏΠΎΠ»ΠΈΡ‚ΠΈΠΊΠΈ России (позиция российских элит ΠΏΠΎ вопросу ΠΊΠΎΠ»Π»Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΠΉ бСзопасности)

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    Π’ послСдниС Π³ΠΎΠ΄Ρ‹ Π²ΠΎ внСшнСй ΠΏΠΎΠ»ΠΈΡ‚ΠΈΠΊΠ΅ России Π·Π°ΠΌΠ΅Ρ‚Π½ΠΎ усилился Свразийский Π²Π΅ΠΊΡ‚ΠΎΡ€, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹ΠΉ Π·Π°ΠΊΠ»ΡŽΡ‡Π°Π΅Ρ‚ΡΡ Π² Ρ€Π°ΡΡˆΠΈΡ€Π΅Π½ΠΈΠΈ сотрудничСства ΠœΠΎΡΠΊΠ²Ρ‹ с Π²Π΅Π΄ΡƒΡ‰ΠΈΠΌΠΈ странами этого ΠΊΠ»ΡŽΡ‡Π΅Π²ΠΎΠ³ΠΎ гСополитичСского Ρ€Π΅Π³ΠΈΠΎΠ½Π°. РоссийскиС политичСскиС элиты ΠΈ ΠΈΡ… Π»ΠΈΠ΄Π΅Ρ€Ρ‹ ΡƒΠ΄Π΅Π»ΡΡŽΡ‚ большоС Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ вопросам ΠΈΠ½Ρ‚Π΅Π³Ρ€Π°Ρ†ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ сотрудничСства со странами этого Ρ€Π΅Π³ΠΈΠΎΠ½Π°, постоянно отмСчая ΠΎ Ρ‚ΠΎΠΌ, Ρ‡Ρ‚ΠΎ ΠΎΠ½ΠΈ Π½Π°ΠΌΠ΅Ρ€Π΅Π½Ρ‹ Π²Ρ‹ΡΡ‚Ρ€Π°ΠΈΠ²Π°Ρ‚ΡŒ эти Π²Π·Π°ΠΈΠΌΠΎΠΎΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΡ Π½Π° Ρ€Π°Π²Π½ΠΎΠΏΡ€Π°Π²Π½Ρ‹Ρ… партнСрских условиях. ОсобоС Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ российскоС руководство удСляСт вопросам ΠΊΠΎΠ»Π»Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΠΉ бСзопасности ΠΈ ΠΏΡ€Π΅Π΄Π»Π°Π³Π°Π΅Ρ‚ свои гСополитичСскиС Ρ„ΠΎΡ€ΠΌΡƒΠ»Ρ‹ для достиТСния Π½Π΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΠΎΠ³ΠΎ для ΠΌΠΈΡ€Π° баланса сил ΠΈ интСрСсов. Евразийский Π²Π΅ΠΊΡ‚ΠΎΡ€ внСшнСй ΠΏΠΎΠ»ΠΈΡ‚ΠΈΠΊΠΈ России сущСствовал всСгда. Но Π² послСдниС Π³ΠΎΠ΄Ρ‹ Π² связи с обострСниСм Ρ†ΠΈΠ²ΠΈΠ»ΠΈΠ·Π°Ρ†ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΊΠΎΠ½Ρ„Π»ΠΈΠΊΡ‚Π° России с ΠΊΠΎΠ»Π»Π΅ΠΊΡ‚ΠΈΠ²Π½Ρ‹ΠΌ Π—Π°ΠΏΠ°Π΄ΠΎΠΌ, ΠΎΠ½ стал Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π°ΠΊΡ‚ΡƒΠ°Π»ΡŒΠ½Ρ‹ΠΌ ΠΈ вострСбованным. РоссийскиС политичСскиС элиты осознали, Ρ‡Ρ‚ΠΎ ΠΈΡ… гСополитичСская ориСнтация Ρ‚ΠΎΠ»ΡŒΠΊΠΎ Π½Π° ΠΎΠ΄ΠΈΠ½ Π—Π°ΠΏΠ°Π΄, Ρ‚Π°ΠΈΡ‚ Π² сСбС ΡΠΊΠ·ΠΈΡΡ‚Π΅Π½Ρ†ΠΈΠ°Π»ΡŒΠ½Ρ‹Π΅ ΡƒΠ³Ρ€ΠΎΠ·Ρ‹ Π½Π°Ρ†ΠΈΠΎΠ½Π°Π»ΡŒΠ½ΠΎΠΉ бСзопасности. Для обСспСчСния послСднСй Π½Π΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΠΎ ΡΠ±Π°Π»Π°Π½ΡΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ свою внСшнюю ΠΏΠΎΠ»ΠΈΡ‚ΠΈΠΊΡƒ, ввСдя Π² Π½Π΅Π΅ ΠΊΠΎΠ½ΠΊΡƒΡ€ΠΈΡ€ΡƒΡŽΡ‰ΠΈΠ΅ противовСсы, ΡΠ΄Π΅Π»Π°Ρ‚ΡŒ ΠΏΠΎΠ»ΠΈΡ‚ΠΈΠΊΡƒ ΠΌΠ½ΠΎΠ³ΠΎΠ²Π΅ΠΊΡ‚ΠΎΡ€Π½ΠΎΠΉ. Π’ настоящСй Ρ€Π°Π±ΠΎΡ‚Π΅ Ρ€Π°ΡΡΠΌΠ°Ρ‚Ρ€ΠΈΠ²Π°ΡŽΡ‚ΡΡ ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΡ‹ Свразийской бСзопасности России Π² контСкстС соврСмСнных Π²Ρ‹Π·ΠΎΠ²ΠΎΠ² ΠΈ ΡƒΠ³Ρ€ΠΎΠ· Π½Π°Ρ‡Π°Π»Π° XXI Π²Π΅ΠΊΠ°

    Analysis of optical magnetoelectric effect in GaFeO_3

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    We study the optical absorption spectra in a polar ferrimagnet GaFeO_3. We consider the E1, E2 and M1 processes on Fe atoms. It is shown that the magnetoelectric effect on the absorption spectra arises from the E1-M1 interference process through the hybridization between the 4p and 3d states in the noncentrosymmetry environment of Fe atoms. We perform a microscopic calculation of the spectra on a cluster model of FeO_6 consisting of an octahedron of O atoms and an Fe atom displaced from the center with reasonable values for Coulomb interaction and hybridization. We obtain the magnetoelectric spectra, which depend on the direction of magnetization, as a function of photon energy in the optical region 1.0-2.5 eV, in agreement with the experiment.Comment: 18 pages, 5 figure

    Effect of Stress on Irradiation-induced Creep and Swelling of Fe-18Cr-10Ni-Ti Steel Pressurized Specimens Irradiated in the BOR-60 Reactor

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    The paper presents the data on the effect of stress of various signs on the irradiationinduced creep strain and swelling of austenitic Fe-18Cr-10Ni-Ti steel pressurized specimens. The pressurized specimens of standard and contoured geometry were irradiated in the BOR-60 reactor up to the damage dose of 90 and 36 dpa, accordingly,under various stress levels applied. Presented are the data resulted from TEM investigations of pressurized specimens performed with the use of the transmission electron microscope

    ИсслСдованиС Π°Ρ€Ρ‚Π΅Ρ€ΠΈΠ°Π»ΡŒΠ½ΠΎΠ³ΠΎ барорСфлСкса ΠΊΠ°ΠΊ систСмы авторСгулирования с двумя ΠΊΠΎΠ½Ρ‚ΡƒΡ€Π°ΠΌΠΈ ΠΎΠ±Ρ€Π°Ρ‚Π½ΠΎΠΉ связи

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    The arterial baroreflex mechanism as an automatic regulation system with two feedback loops is investigated. The approach for the evaluation of the vascular com.ponent of the baroreflex mechanism has shown. It is also shown that baroreflex sensitivity for single and double loop feedback models has low correlation between each other.ИсслСдован ΠΌΠ΅Ρ…Π°Π½ΠΈΠ·ΠΌ Π°Ρ€Ρ‚Π΅Ρ€ΠΈΠ°Π»ΡŒΠ½ΠΎΠ³ΠΎ барорСфлСкса (АБР) с ΠΏΠΎΠ·ΠΈΡ†ΠΈΠΈ Π΅Π³ΠΎ прСдставлСния ΠΊΠ°ΠΊ Π΄Π²ΡƒΡ…ΠΊΠΎΠ½Ρ‚ΡƒΡ€Π½ΠΎΠΉ систСмы авторСгулирования. ΠŸΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½ ΠΏΠΎΠ΄Ρ…ΠΎΠ΄ для ΠΎΡ†Π΅Π½ΠΊΠΈ сосудистого ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚Π° АБР. ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΎ сравнСниС ΠΎΡ†Π΅Π½ΠΎΠΊ АБР для ΠΎΠ΄Π½ΠΎ- ΠΈ Π΄Π²ΡƒΡ…ΠΊΠΎΠ½Ρ‚ΡƒΡ€Π½ΠΎΠΉ систСм ΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π½Π° ΠΈΡ… низкая взаимная коррСляция. Π’Π°ΠΊΠΆΠ΅ ΠΏΠΎΠΊΠ°Π·Π°Π½ эффСкт Π²Π·Π°ΠΈΠΌΠ½ΠΎΠΉ компСнсации ΠΊΠΎΠ½Ρ‚ΡƒΡ€ΠΎΠ² рСгуляции ΠΏΡ€ΠΈ ослаблСнии ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ· Π½ΠΈΡ…

    Π‘ΠžΠ¦Π˜ΠΠ›Π¬ΠΠž-ΠŸΠžΠ›Π˜Π’Π˜Π§Π•Π‘ΠšΠ˜Π• Π’Π«Π—ΠžΠ’Π« И Π£Π“Π ΠžΠ—Π« Π’ ΠšΠΠ‘ΠŸΠ˜Π™Π‘ΠšΠžΠœ Π“Π•ΠžΠŸΠžΠ›Π˜Π’Π˜Π§Π•Π‘ΠšΠžΠœ ΠŸΠ ΠžΠ‘Π’Π ΠΠΠ‘Π’Π’Π• НАЧАЛА XXI Π².

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    Basic regional economic integration directions contributing provision for national safety and national interests of Caspian geopolitical space states are discussed. Optimal ways to create favorable economic development pre-conditions for states of the Caspian region are defined. The influence of social and political challenges and threats on stability and state of affairs in the Caspian region as well as in the Caucasus, Persian Gulf and Central Asia is analyzed.Π Π°ΡΠΊΡ€Ρ‹Π²Π°ΡŽΡ‚ΡΡ основныС направлСния Ρ€Π΅Π³ΠΈΠΎΠ½Π°Π»ΡŒΠ½ΠΎΠΉ экономичСской ΠΈΠ½Ρ‚Π΅Π³Ρ€Π°Ρ†ΠΈΠΈ, ΡΠΏΠΎΡΠΎΠ±ΡΡ‚Π²ΡƒΡŽΡ‰Π΅ΠΉ ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡Π΅Π½ΠΈΡŽ Π½Π°Ρ†ΠΈΠΎΠ½Π°Π»ΡŒΠ½ΠΎΠΉ бСзопасности ΠΈ Π½Π°Ρ†ΠΈΠΎΠ½Π°Π»ΡŒΠ½Ρ‹Ρ… интСрСсов государств Каспийского гСополитичСского пространства. ΠžΠΏΡ€Π΅Π΄Π΅Π»ΡΡŽΡ‚ΡΡ ΠΎΠΏΡ‚ΠΈΠΌΠ°Π»ΡŒΠ½Ρ‹Π΅ ΠΏΡƒΡ‚ΠΈ создания благоприятных прСдпосылок для развития экономики прикаспийских государств. АнализируСтся влияниС ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎ-политичСских Π²Ρ‹Π·ΠΎΠ² ΠΈ ΡƒΠ³Ρ€ΠΎΠ· Π½Π° ΡΡ‚Π°Π±ΠΈΠ»ΡŒΠ½ΠΎΡΡ‚ΡŒ ΠΈ ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΠ΅ Π΄Π΅Π» Π² Каспийском Ρ€Π΅Π³ΠΈΠΎΠ½Π΅, Π° Ρ‚Π°ΠΊΠΆΠ΅ Π½Π° КавказС, Π² ΠŸΠ΅Ρ€ΡΠΈΠ΄ΡΠΊΠΎΠΌ Π·Π°Π»ΠΈΠ²Π΅ ΠΈ Π² Π¦Π΅Π½Ρ‚Ρ€Π°Π»ΡŒΠ½ΠΎΠΉ Азии

    Statistical prediction of protein structural, localization and functional properties by the analysis of its fragment mass distributions after proteolytic cleavage

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    Structural, localization and functional properties of unknown proteins are often being predicted from their primary polypeptide chains using sequence alignment with already characterized proteins and consequent molecular modeling. Here we suggest an approach to predict various structural and structure-associated properties of proteins directly from the mass distributions of their proteolytic cleavage fragments. For amino-acid-specific cleavages, the distributions of fragment masses are determined by the distributions of inter-amino-acid intervals in the protein, that in turn apparently reflect its structural and structure-related features. Large-scale computer simulations revealed that for transmembrane proteins, either Ξ±-helical or Ξ²-barrel secondary structure could be predicted with about 90% accuracy after thermolysin cleavage. Moreover, 3/4 intrinsically disordered proteins could be correctly distinguished from proteins with fixed three-dimensional structure belonging to all four SCOP structural classes by combining 3-4 different cleavages. Additionally, in some cases the protein cellular localization (cytosolic or membrane-associated) and its host organism (Firmicute or Proteobacteria) could be predicted with around 80% accuracy. In contrast to cytosolic proteins, for membrane-associated proteins exhibiting specific structural conformations, their monotopic or transmembrane localization and functional group (ATP-binding, transporters, sensors and so on) could be also predicted with high accuracy and particular robustness against missing cleavages
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