68 research outputs found
Compaction and flow rule of oxide nanopowders
Transparent Al2O3 ceramics have attracted considerable interest for use in a wide range of optical, electronic and structural applications. The fabrication of these ceramics using powder metallurgy processes requires the development of theoretical approaches to the compaction of nanopowders. In this work, we investigate the compaction processes of two model granular systems imitating Al2O3 nanosized powders. System I is a loosely aggregated powder, and system II is a powder strongly inclined to agglomeration (for instance, calcined powder). The processes of isostatical (uniform), biaxial, and uniaxial compaction as well as uniaxial compaction with simultaneous shear deformation are studied. The energy parameters of compaction such as the energy change of elastic interparticle interactions and dispersion interactions, dissipative energy losses related to the processes of interparticle friction, and the total work of compaction are calculated for all the processes. The nonapplicability of the associated flow rule to the description of deformation processes of oxide nanopowders is shown and an alternative plastic flow rule is suggested. A complete system of determining the relationship of the flow including analytical approximations of yield surfaces is obtained. Β© 2016 Elsevier B.V
Π’Π΅ΠΎΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π°ΡΠΏΠ΅ΠΊΡΡ ΠΈ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π°Π΄Π³Π΅Π·ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΏΠΎΠ»ΠΈΠ΄ΠΈΡΠΏΠ΅ΡΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ Β«Π±ΠΈΡΡΠΌΠ½ΠΎ-ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΠΎΠ΅ Π²ΡΠΆΡΡΠ΅Π΅ - ΡΠ΅ΠΌΠ΅Π½ΡΠΎΠ±Π΅ΡΠΎΠ½Π½Π°Ρ ΠΏΠΎΠ²Π΅ΡΡ Π½ΠΎΡΡΡΒ»
The paper contains the theoretical substantiation of adhesive interaction of bituminous-polymeric binding agent with hard cement and concrete surface with the purpose to develop new and up-to-date waterproofing coatings. Experimental research work of adhesive interaction has shown that increase of polarity of filled and non-filled binding agents leads to increase of their adhesion to cement and concrete surface. At the same time there is optimum binding agent content in solvent when its adhesion to concrete surface is characterized by maximum value.Π ΡΠ°Π±ΠΎΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠ΅ΠΎΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΎΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΡ Π°Π΄Π³Π΅Π·ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ Π±ΠΈΡΡΠΌΠ½ΠΎ-ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ Π²ΡΠΆΡΡΠ΅Π³ΠΎ Ρ ΡΠ²Π΅ΡΠ΄ΠΎΠΉ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΡΡ ΡΠ΅ΠΌΠ΅Π½ΡΠΎΠ±Π΅ΡΠΎΠ½Π° Ρ ΡΠ΅Π»ΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ Π½ΠΎΠ²ΡΡ
ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Π³ΠΈΠ΄ΡΠΎΠΈΠ·ΠΎΠ»ΡΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ. ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π°Π΄Π³Π΅Π·ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΡΠΎ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΠΏΠΎΠ»ΡΡΠ½ΠΎΡΡΠΈ ΠΊΠ°ΠΊ Π½Π°ΠΏΠΎΠ»Π½Π΅Π½Π½ΡΡ
, ΡΠ°ΠΊ ΠΈ Π½Π΅Π½Π°ΠΏΠΎΠ»Π½Π΅Π½Π½ΡΡ
Π²ΡΠΆΡΡΠΈΡ
Π²Π΅Π΄Π΅Ρ ΠΊ Π²ΠΎΠ·ΡΠ°ΡΡΠ°Π½ΠΈΡ Π°Π΄Π³Π΅Π·ΠΈΠΈ ΠΈΡ
ΠΊ ΡΠ΅ΠΌΠ΅Π½ΡΠΎΠ±Π΅ΡΠΎΠ½Π½ΠΎΠΉ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ, ΠΏΡΠΈ ΡΡΠΎΠΌ ΡΡΡΠ΅ΡΡΠ²ΡΠ΅Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½Π°Ρ ΠΎΠ±Π»Π°ΡΡΡ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Π²ΡΠΆΡΡΠ΅Π³ΠΎ Π² ΡΠ°ΡΡΠ²ΠΎΡΠΈΡΠ΅Π»Π΅, ΠΏΡΠΈ ΠΊΠΎΡΠΎΡΠΎΠΌ Π°Π΄Π³Π΅Π·ΠΈΡ Π΅Π³ΠΎ ΠΊ Π±Π΅ΡΠΎΠ½Π½ΠΎΠΉ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΈΠΌΠ΅Π΅Ρ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅
ΠΠΎΠΌΠΏΡΡΡΠ΅ΡΠ½Π°Ρ ΡΠΈΡΡΠ΅ΠΌΠ° Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΡΠ°Π½ΡΠΌΠΈΡΡΠΈΠΉ ΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΡΡ ΠΌΠ°ΡΠΈΠ½
A new method for diagnostics of mechanical transmissions of mobile machinery is proposed in the paper. The method presupposes an application of computing equipment and its purpose is to decrease labor-consumption of diagnostics procedure and increase diagnostics efficiency.The method is based on comparison of duration of impulse periods picked up at primary transducers which are installed at transmission input and output. A signal picked up at a flywheel ring gear is taken as a reference signal.While selecting clearances of one and then the direction in speed-up - braking transmission regime changes in number of reference impulses at output provide data on angular clearance value in every gearing. As data are supplied registration and processing of results and forecasting of residual resource are to be done with the help of a program on the basis of realized algorithms for every gearing.ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ ΡΠΏΠΎΡΠΎΠ± Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ°Π½ΡΠΌΠΈΡΡΠΈΠΉ ΠΌΠΎΠ±ΠΈΠ»ΡΠ½ΡΡ
ΠΌΠ°ΡΠΈΠ½ Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π²ΡΡΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΠ΅Ρ
Π½ΠΈΠΊΠΈ Π² ΡΠ΅Π»ΡΡ
ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΡΡΡΠ΄ΠΎΠ΅ΠΌΠΊΠΎΡΡΠΈ ΠΏΠΎΡΡΠ°Π½ΠΎΠ²ΠΊΠΈ Π΄ΠΈΠ°Π³Π½ΠΎΠ·Π°, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠ²Π½ΠΎΡΡΠΈ.Π‘ΠΏΠΎΡΠΎΠ± ΠΎΡΠ½ΠΎΠ²Π°Π½ Π½Π° ΡΠΎΠΏΠΎΡΡΠ°Π²Π»Π΅Π½ΠΈΠΈ Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΠΏΠ΅ΡΠΈΠΎΠ΄ΠΎΠ² ΠΈΠΌΠΏΡΠ»ΡΡΠΎΠ², ΡΠ½ΠΈΠΌΠ°Π΅ΠΌΡΡ
Ρ ΠΏΠ΅ΡΠ²ΠΈΡΠ½ΡΡ
ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»Π΅ΠΉ, ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π½ΡΡ
Π½Π° Π²Ρ
ΠΎΠ΄Π΅ ΠΈ Π²ΡΡ
ΠΎΠ΄Π΅ ΡΡΠ°Π½ΡΠΌΠΈΡΡΠΈΠΈ. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΠΏΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΡΡΡ ΡΠΈΠ³Π½Π°Π», ΡΠ½ΠΈΠΌΠ°Π΅ΠΌΡΠΉ Ρ Π·ΡΠ±ΡΠ°ΡΠΎΠ³ΠΎ Π²Π΅Π½ΡΠ° ΠΌΠ°Ρ
ΠΎΠ²ΠΈΠΊΠ°.Π ΡΠ΅ΠΆΠΈΠΌΠ΅ Β«ΡΠ°Π·Π³ΠΎΠ½ - ΡΠΎΡΠΌΠΎΠΆΠ΅Π½ΠΈΠ΅Β» ΡΡΠ°Π½ΡΠΌΠΈΡΡΠΈΠΈ ΠΏΡΠΈ Π²ΡΠ±ΠΎΡΠ΅ Π·Π°Π·ΠΎΡΠΎΠ² ΡΠ½Π°ΡΠ°Π»Π° ΠΎΠ΄Π½ΠΎΠ³ΠΎ, Π° Π·Π°ΡΠ΅ΠΌ Π΄ΡΡΠ³ΠΎΠ³ΠΎ Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° ΠΎΠΏΠΎΡΠ½ΡΡ
ΠΈΠΌΠΏΡΠ»ΡΡΠΎΠ² Π² Π²ΡΡ
ΠΎΠ΄Π½ΠΎΠΌ Π΄Π°Π΅Ρ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΡ ΠΎ Π²Π΅Π»ΠΈΡΠΈΠ½Π΅ ΡΠ³Π»ΠΎΠ²ΠΎΠ³ΠΎ Π·Π°Π·ΠΎΡΠ° ΠΏΠΎ ΠΊΠ°ΠΆΠ΄ΠΎΠΌΡ Π·ΡΠ±ΡΠ°ΡΠΎΠΌΡ Π·Π°ΡΠ΅ΠΏΠ»Π΅Π½ΠΈΡ. Π€ΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΈ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ° ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ², Π° ΡΠ°ΠΊΠΆΠ΅ ΠΏΡΠΎΠ³Π½ΠΎΠ·ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ΅ΡΡΡΡΠ° ΠΏΠΎ ΠΌΠ΅ΡΠ΅ ΠΏΠΎΡΡΡΠΏΠ»Π΅Π½ΠΈΡ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΏΡΠΎΠΈΡΡ
ΠΎΠ΄ΡΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π½ΡΡ
Π°Π»Π³ΠΎΡΠΈΡΠΌΠΎΠ² Π΄Π»Ρ ΠΊΠ°ΠΆΠ΄ΠΎΠ³ΠΎ Π·ΡΠ±ΡΠ°ΡΠΎΠ³ΠΎ Π·Π°ΡΠ΅ΠΏΠ»Π΅Π½ΠΈΡ
The Future of the Correlated Electron Problem
The understanding of material systems with strong electron-electron
interactions is the central problem in modern condensed matter physics. Despite
this, the essential physics of many of these materials is still not understood
and we have no overall perspective on their properties. Moreover, we have very
little ability to make predictions in this class of systems. In this manuscript
we share our personal views of what the major open problems are in correlated
electron systems and we discuss some possible routes to make progress in this
rich and fascinating field. This manuscript is the result of the vigorous
discussions and deliberations that took place at Johns Hopkins University
during a three-day workshop January 27, 28, and 29, 2020 that brought together
six senior scientists and 46 more junior scientists. Our hope, is that the
topics we have presented will provide inspiration for others working in this
field and motivation for the idea that significant progress can be made on very
hard problems if we focus our collective energies.Comment: 55 pages, 19 figure
Plastic accumulation in the Mediterranean Sea
Concentrations of floating plastic were measured throughout the Mediterranean Sea to assess whether this basin can be regarded as a great accumulation region of plastic debris. We found that the average density of plastic (1 item per 4 m2), as well as its frequency of occurrence (100% of the sites sampled), are comparable to the accumulation zones described for the five subtropical ocean gyres. Plastic debris in the Mediterranean surface waters was dominated by millimeter-sized fragments, but showed a higher proportion of large plastic objects than that present in oceanic gyres, reflecting the closer connection with pollution sources. The accumulation of floating plastic in the Mediterranean Sea (between 1,000 and 3,000 tons) is likely related to the high human pressure together with the hydrodynamics of this semi-enclosed basin, with outflow mainly occurring through a deep water layer. Given the biological richness and concentration of economic activities in the Mediterranean Sea, the affects of plastic pollution on marine and human life are expected to be particularly frequent in this plastic accumulation region
Nuclear Interactions Of Super High Energy Cosmic-rays Observed In Mountain Emulsion Chambers
Here we present a summary of joint discussions on the results of three mountain experiments with large-scale emulsion chambers, at Pamir, Mt. Fuji and Chacaltaya. Observations cover gamma quanta, hadrons and their clusters (called "families"). The following topics are covered, concerning the characteristics of nuclear interactions the energy region 1014-1016 eV: (i) rapid dissipation seen in atmospheric diffusion of high-energy cosmic-rays; (ii) multiplicity and Pt increase in produced pi-mesons in the fragmentation region; (iii) existence of large-Pt jets, (iv) extremely hadron-rich family of the Centauro type; (v) exotic phenomena in the extremely high energy region beyond 1016 eV. Β© 1981.1911125(1977) Acta Univ. Lodz ser. II, (60)(1973) 13th Int. Cosmic-ray Conf., 3, p. 2228(1975) 14th Int. Cosmic-Ray Conf., 7, p. 2365(1979) AIP Conf. Proc. no. 49, p. 334(1979) 16th Int. Cosmic-ray Conf., 6, p. 344(1979) 16th Int. Cosmic-ray Conf., 7, p. 6816th Int. Cosmic-ray Conf. (1979) 16th Int. Cosmic-ray Conf., 7, p. 284(1979) 16th Int. Cosmic-ray Conf., 7, p. 294(1979) 16th Int. Cosmic-ray Conf., 13, p. 87(1979) 16th Int. Cosmic-ray Conf., 13, p. 92(1979) 16th Int. Cosmic-ray Conf., 13, p. 98(1979) AIP Conf. Proc. no. 49, p. 94(1979) AIP Conf. Proc. no. 49, p. 145(1979) AIP Conf. Proc. no. 49, p. 317(1979) 16th Int. Cosmic-ray Conf., 6, p. 350(1979) 16th Int. Cosmic-ray Conf., 6, p. 356(1979) 16th Int. Cosmic-ray Conf., 6, p. 362Nikolsky, Proc. 9th Int. High-energy Symp. (1978) CSSR, 21. , ToborMiyake, (1978) Proc. 19th Int. Conf. on High-energy physics, p. 433Vernov, (1977) Physica, 3, p. 1601Khristiansen, (1978) JETP Lett., 28, p. 124(1973) 13th Int. Cosmic-ray Conf., 3, p. 2219Izv. Acad. Nauk USSR, ser Phys. (1974) Izv. Acad. Nauk USSR, ser Phys., 38, p. 918(1975) 14th Int. Cosmic-ray Conf., 7, p. 2365(1979) 16th Int. Cosmic-ray Conf., 7, p. 68Dunaevsky, Urysson, Emelyanov, Shorin, Tashimov, (1975) FIAN preprint no. 150Dunaevsky, Urysson, Emelyanov, Shorin, Tashinov, (1979) Acta Univ. Lodz ser. II, (60), p. 199Ivanenko, Kanevskya, Roganova, (1978) JETP Lett., 40, p. 704Ivanenko, Kanevsky, Roganova, (1979) 16th Int. Cosmic-ray Conf., 7, p. 101Ivanenko, Kanevsky, Roganova, (1979) 16th Int. Cosmic-ray Conf., 7, p. 198Wrotniak, (1977) Acta Univ. Lodz ser. II, (60), p. 165Krys, Tomaszevski, Wrotniak, (1979) 16th Int. Cosmic-ray Conf., 7, p. 182Krys, Tomaszevski, Wrotniak, (1979) 16th Int. Cosmic-ray Conf., 7, p. 186Fomin, Kempa, Khristiansen, Levina, Piotrowska, Wdowczyk, (1977) 15th Int. Cosmic-ray Conf., 7, p. 248Fomin, Kempa, Khristiansen, Levina, Piotrowska, Wdowczyk, (1979) 16th Int. Cosmic-ray Conf., 13, p. 82Azimov, Mullazhanov, Yuldashbayev, (1979) 16th Int. Cosmic-ray Conf., 7, p. 262Azimov, Mullazhanov, Yuldashbayev, (1977) Acta Univ. Lodz ser. II, (60), p. 275Kasahara, Torri, Yuda, (1979) 16th Int. Cosmic-ray Conf., 13, p. 70Kasahara, Torii, Yuda, (1979) 16th Int. Cosmic-ray Conf., 13, p. 79Shibata, (1979) 16th Int. Cosmic-ray Conf., 7, p. 176H. Semba, T. Shibata and T. Tabuki, Suppl. Prog. Theor. Phys., to be publishedZhdanov, Roinishvilli, Smorodin, Tomaszevski, (1975) FIAN preprint no. 163Lattes, Fujimoto, Hasegawa, Hadronic interactions of high energy cosmic-ray observed by emulsion chambers (1980) Physics Reports, 65, p. 152Ellsworth, Gaisser, Yodh, (1981) Phys. Rev., 23 D, p. 764Baradzei, Smorodin, (1974) FIAN preprint nos. 103, 104Baradzei, Smorodin, (1977) Acta Univ. Lodz ser. II, (60), p. 51Zhdanov, (1980) FIAN preprint no. 140H. Semba, T. Shibata and T. Tabuki, Suppl. Prog. Theor. Phys., to be publishedShibata, (1980) Phys. Rev., 22 D, p. 100Slavatinsky, (1980) Proc. 7th European Symp. on Cosmic rays, , Leningrad, to be published(1979) AIP Conference Proc. no. 49, p. 145Azimov, Abduzhamilov, Chudakov, (1963) JETP (Sov. Phys.), 45, p. 40713th Int. Cosmic-ray Conf. (1973) 13th Int. Cosmic-ray Conf., 5, p. 326Acharya, Rao, Sivaprasad, Rao, (1979) 16th Int. Cosmic-ray Conf., 6, p. 289Ellsworth, Goodman, Yodh, Gaisser, Stanev, (1981) Phys. Rev., 23 D, p. 771Bariburina, Guseva, Denisova, (1980) Acta Univ. Lodz, 1, p. 9415th Int. Cosmic-ray Conf. (1977) 15th Int. Cosmic-ray Conf., 7, p. 184(1979) AIP Conf. Proc. no. 49, p. 33
Toward the Integrated Marine Debris Observing System
Plastics and other artiο¬cial materials pose new risks to the health of the ocean. Anthropogenic debris travels across large distances and is ubiquitous in the water and on shorelines, yet, observations of its sources, composition, pathways, and distributions in the ocean are very sparse and inaccurate. Total amounts of plastics and other man-made debris in the ocean and on the shore, temporal trends in these amounts under exponentially increasing production, as well as degradation processes, vertical ο¬uxes, and time scales are largely unknown. Present ocean circulation models are not able to accurately simulate drift of debris because of its complex hydrodynamics. In this paper we discuss the structure of the future integrated marine debris observing system (IMDOS)thatisrequiredtoprovidelong-termmonitoringofthestateofthisanthropogenic pollution and support operational activities to mitigate impacts on the ecosystem and on the safety of maritime activity. The proposed observing system integrates remote sensing and in situ observations. Also, models are used to optimize the design of the system and, in turn, they will be gradually improved using the products of the system. Remote sensing technologies will provide spatially coherent coverage and consistent surveying time series at local to global scale. Optical sensors, including high-resolution imaging, multi- and hyperspectral, ο¬uorescence, and Raman technologies, as well as SAR will be used to measure different types of debris. They will be implemented in a variety of platforms, from hand-held tools to ship-, buoy-, aircraft-, and satellite-based sensors. A network of in situ observations, including reports from volunteers, citizen scientists and ships of opportunity, will be developed to provide data for calibration/validation of remote sensors and to monitor the spread of plastic pollution and other marine debris. IMDOS will interact with other observing systems monitoring physical, chemical, and biological processes in the ocean and on shorelines as well as the state of the ecosystem, maritime activities and safety, drift of sea ice, etc. The synthesized data will support innovative multi-disciplinary research and serve a diverse community of users
Computer System For Diagnostics of Mobile Machinery Transmission
A new method for diagnostics of mechanical transmissions of mobile machinery is proposed in the paper. The method presupposes an application of computing equipment and its purpose is to decrease labor-consumption of diagnostics procedure and increase diagnostics efficiency.The method is based on comparison of duration of impulse periods picked up at primary transducers which are installed at transmission input and output. A signal picked up at a flywheel ring gear is taken as a reference signal.While selecting clearances of one and then the direction in speed-up - braking transmission regime changes in number of reference impulses at output provide data on angular clearance value in every gearing. As data are supplied registration and processing of results and forecasting of residual resource are to be done with the help of a program on the basis of realized algorithms for every gearing
Theoretical Aspects and Experimental Research of Adhesive Interaction of Polydisperse System Β«Bituminous-Polymeric Binding Agent - Cement and Concrete SurfaceΒ»
The paper contains the theoretical substantiation of adhesive interaction of bituminous-polymeric binding agent with hard cement and concrete surface with the purpose to develop new and up-to-date waterproofing coatings. Experimental research work of adhesive interaction has shown that increase of polarity of filled and non-filled binding agents leads to increase of their adhesion to cement and concrete surface. At the same time there is optimum binding agent content in solvent when its adhesion to concrete surface is characterized by maximum value
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