96 Works

Language of Criminalistic Research as a Basis for Studying Criminal Legal Phenomena

Dmitriy Mokhorov & Alexander Fedyukovsky
This essay for the inaugural issue of Technology and Language explores the complicated interrelation of conceptual and technological change in the context of scientific development. It shows how these relations become even more complex in the age of information technologies. Criminalistic research offers a case in point. It is defined by a set of technologies and a precise language which serves to render vague legal concepts determinate. Technology is not only used by law enforcement...

Fire resistance of monolithic reinforced concrete structures of the tall residential building with core structural system

Ivan Dmitriev, Marina Gravit, Михаил Назаров & Владимир Иванов

Strength and deformability of compressed-bent masonry structures during and after fire

Арина Мохирева, Arturs Proskurovskis, Ekaterina Glebova, Levon Nazinyan & Nikita Belousov

Rotary actuator control based on tensile force elements made of shape memory Cu-Al-Ni crystals when operated in a cyclic mode

A.I. Priadko, S.A. Pulnev, O.O. Kovalev & I.A. Ilin
An actuator design and a function scheme are developed. A control algorithm of a cyclic actuator is considered. We provide experimental results on the control algorithm and the actuator. The actuator operating range is 60°. The actuator sped is ~ 1 degree/second. The actuator operating is stable in any rotation angle in operating range.

Heating and destruction of biological tissue by high-inensity focused ultrasound

T.A. Andreeva, A.E. Berkovich, N.Y. Bykov, S.V. Kozyrev & A.Ya. Lukin
Processes of heating and destruction of the breast fat tissue under the action of focused high-intensity ultrasound generated by a 128-element transducer are considered. The simulation of a thermal problem is carried out by anumerical solution of the heat transfer equation. The acoustic pressure field in the tissue is calculated using the Rayleigh integral. A system of dimensionless scaling parameters is proposed to describe the non-stationary process of heat propagation. The influenceof the space localization...

Micromechanics, nanophysics and non-destructive testing of the strength of structural materials

V.V. Nosov, I.E. Chaplin, E.R. Gilyazetdinov, E.V. Grigoriev & I.A. Pavlenko
Non-destructive testing of the strength of structural materials is currently based on the correlation between the results of laboratory tests of the strength of standard macro samples and the strength characteristics of the material in a real object. The heterogeneity of the strength properties of different zones of the material makes this correlation ambiguous, introducing uncertainty in the test results. The solution of the problem relates to the necessity of transition to the micro- and...

Corrosion resistance and mechanical performance of steel reinforcement, before and after shot-blasting process

Ch. Apostolopoulos, Arg. Drakakaki, А.I. Rudskoi, G.Е. Коdzhaspirov & Alk. Apostolopoulos
As it is widely known, corrosion of steel reinforcement is one of the main causes of deterioration of the reinforced concrete structures. Corrosion phenomena combined with seismic loads aggravate the situation. For this reason, in the present paper, an effort is made to upgrade the performance of steel reinforcement against corrosion, using the shot blasting method. Precisely, two groups of specimens were prepared, one of which had previously been shot blasted. Afterwards, the specimens were...

ALGORITHM FOR POSITIONING OF ROTARY ACTUATORS BASED ON SHAPE MEMORY Cu-Al-Ni TENSILE FORCE ELEMENTS

A. Priadko, S. Pulnev, O. Kovalev & I. Ilin
This paper considers positioning algorithms for rotary actuators based on shape memory Cu-Al-Ni crystals. The actuator function scheme is provided. An algorithm for positioning of the actuator based on an actual rotary angle has been developed. Experimental results on the control algorithm and the actuator are presented. The functional characteristics of the actuator (rotation speed and positioning accuracy) are considered.

SIMULATION OF INVERSE HALL-PETCH RELATION IN NANOCRYSTALLINE CERAMICS BY DISCRETE DISLOCATION DYNAMICS METHOD

S.V. Bobylev
A theoretical model of plastic deformation of nanocrystalline ceramics in the region of small grain sizes is proposed. In the framework of the model, deformation is described as the combined action of grain boundary sliding and emission of lattice dislocations from triple junctions of grain boundaries. Using the method of discrete dislocation dynamics we obtained an inverse Hall-Petch relation, which qualitatively coincides with the experimentally measured dependences of microhardness in nanocrystalline ceramics with extremely small...

Оценка показателей виброустойчивости гидростатических подшипников при коррекции их динамических свойств

Михаил Семенович Бундур, Никита Александрович Пелевин & Вячеслав Алексеевич Прокопенко
Приведена актуальность исследования возможностей повышения динамического качества опор шпиндельного узла, которые в первую очередь определяют производительность, качество и точность обработки деталей. Рассмотрены известные критерии оценки запаса устойчивости системы автоматического регулирования гидростатического подшипника при введении в его схему управления корректирующих RC-цепей. В целях упрощения процедуры определения параметров коррекции на основе преобразованных структурных схем системы автоматического регулирования разработаны соответствующие модели, позволяющие выполнять построение переходных процессов, амплитудно-частотной характеристики для вычисления логарифмического декремента, логарифмической амплитудно-частотной и фазочастотной характеристик для...

Forensic Studies of Trace Evidence Altered by Fire

Igor Latyshov, Mikhail Pakhomov & Natalia Anosova
When investigating crimes involving fire, it is necessary to assess the event of a crime and the circumstances and to find the causes and spread of the fire, and the possible evidence supporting that the fire was used as a means of concealing a previously committed crime, i.e. murder, burglary, etc. Forensic studies of the objects damaged by the fire require the knowledge of theoretical aspects and the ability to detect and evaluate changed patterns...

DEVELOPMENT OF A SYSTEM-SYNERGETIC APPROACH TO COST MANAGEMENT FOR A HIGH-TECH INDUSTRIAL ENTERPRISE

Ekaterina Burova, Sergei Grishunin & Svetlana Suloeva

SUSTAINABLE DEVELOPMENT AND ENGINEERING ECONOMICS

Irina Rudskaia, Dmitrii Rodionov, Tatiana Kudryavtseva & Angi Skhvediani

CLUSTERING OF TERRITORIAL OBJECTS IN THE MANAGEMENT OF THEIR SUSTAINABLE DEVELOPMENT

Dmitrii Rodionov, Dmitry Alferev, Yuliya Klimova & Kaisar Serikuly Alpysbayev

BALANCE SCOREBOARD FOR SUSTAINABLE DEVELOPMENT IN THE RUSSIAN ARCTIC ZONE

Svetlana Gutman

Calibration and Validation of the Menetrey-Willam Constitutive Model for Concrete

Andrey Dmitriev, Iurii Novozhilov, Dmitriy Mikhaluk & Vladimir Lalin

Имитационное моделирование зимнего бетонирования стеновой конструкции

Mikhail Komarinskiy & Roman Oniskovets
Существует много технологий зимнего бетонирования, как в отечественной, так и зарубежной практике. При большом выборе вариантов прогрева бетона, применяемой для различных конструктивных систем и условий внешней среды, в настоящее время наиболее распространен метод прогрева проводами. Анализ современных методов термообработки бетона показывает, что использование греющих проводов позволяет обеспечить подвод тепла непосредственно к бетону в необходимом объеме на каждом этапе его выдерживания. Это способствует оптимизации процесса электропрогрева, а также оказывает влияние на скорость подъема температуры и остывания...

Axial misfit stress relaxation in core-shell nanowires with hexagonal core via nucleation of rectangular prismatic dislocation loops

S.A. Krasnitckii, A.M. Smirnov, K.D. Mynbaev, L.V. Zhigilei & M.Yu. Gutkin
A theoretical model of axial misfit stress relaxation in core-shell nanowires with hexagonal cross section of the core through the nucleation of prismatic dislocation loops is suggested. Different nucleation sites of the loops in core-shell nanowires are considered. The energy change caused by the loop nucleation is calculated. The critical condition for the onset of the loops is given and analyzed in detail. The most favorable sites in nanowires and the optimal loop shape are...

Natural isomers of fullerenes from C4 to C20

Alexander I. Melker & Aleksandra N. Matvienko
We have systematized possible ways of forming the isomers of mini-fullerenes, namely elementary fullerenes: tetrahedron C4, triangular prism C6, cube C8, pentagonal prism C10, hexagonal prism C12, as well as their derivatives, which were obtained by joining elementary fullerenes. Combined with the graph analysis, this approach allows obtain a clear knowledge of their structure. Among them there are barrel-shaped fullerenes: C12, C16, C20; tetrahedral ones C12 and C16; bi-shamrocks C14 and C18, bipyramids C14 and...

Modeling microstructure evolution during thermomechanical processing and heat treatment of steels and predicting their mechanical properties

A.A. Vasilyev, D.F. Sokolov & S.F. Sokolov
An integral computer model/program AusEvol Pro was developed to describe the evolution of steel microstructure during thermomechanical processing (hot rolling, forging), as well as subsequent heat treatment (normalization, tempering), and to evaluate the final mechanical properties (yield stress, tensile stress, elongation), hardness and impact toughness. The program implements a set of physically based models that allow quantitative description of all significant processes of steel structure formation with account of the effects of chemical composition both...

Nano- and microparticle aggregation: unique optical vectors for control

Alexandra G. Bezrukova & Olga L. Vlasova
The multiparameter analysis of simultaneous optical data for systems of nano- and/or micro-particles (3D disperse systems, dispersions, colloids, ensembles with the average diameter less than 10 micrometers) can be presented as the system characteristics characterized by N-dimensional unique vectors of optical parameters that can elucidate changes in the state of system particles. The application of ND unique optical vector approach is shown for several biomedical dispersions at the processes of aggregation. This approach can serve...

Element-free numerical modeling with discrete gradient and its application to crystal defects

A.A. Zisman
The gradient operation has been extended to discrete data in terms of nodal coordinates. On this ground, the nodal strains and related stresses are expressed directly in terms of nodal displacements and the stress divergence in terms of nodal stresses. To make use of truly discrete modeling in computational solid mechanics, the stress balance equation is formulated. For a case study, the latter is applied to an edge dislocation where atom positions of a dislocated...

The Language of Human-Machine Communication

Daria Bylieva
This essay for the inaugural issue of Technology and Language discusses the problem of finding an optimal form of human-machine communication. In the ongoing search for an alien mind, humanity seems to find it not in the infinities of space, but in its own environment. Changes in the language of human-machine interaction made it understandable not only to trained specialists but to every household. In the course of time, home appliances and devices have developed...

Language of Art as Language of Utopia

Natalia Ershova
This essay for the inaugural issue of Technology and Language looks at language and technology coming together in avant-garde art, Russian futurism and constructivism. When words become a visual elements in the composition of new worlds, the creation of words can be seen as a way of breaking with the thinking of the past, but it can also be viewed as a social technology for the construction of a new life. Artists and poets experimented...

NUCLEAR GEOMETRY: SODIUM, MAGNESIUM, ALUMINUM

Alexander I. Melker
The nuclear geometry has been developed by analogy with the fullerene geometry. On the basis of this geometric approach, it was possible to design the structure of sodium, magnesium and aluminum isomers and their isotopes, which can be obtained by means of nuclear synthesis. The most stable nuclei can be classed into two groups: basic nuclei having equal number of protons and neutrons and isotopes having one or two more neutrons. The latter ensure their...

Registration Year

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Affiliations

  • Peter the Great St. Petersburg Polytechnic University
    96
  • Institute of Problems of Mechanical Engineering
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  • Ioffe Institute
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  • ITMO University
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  • Graz University of Technology
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  • University of Patras
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  • Saint Petersburg Mining University
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  • St Petersburg University
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  • Volgograd Academy of the Russian Internal Affairs Ministry
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  • Saint-Petersburg State University of Technology and Design
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