Development Of Technological Equipment Research Articles

Windsurfing’s Rapid Global Diffusion: The Evolution of a 1970s Technology-First Sport

There has been considerable academic interest in what has been variously labelled new, lifestyle or, as used here, technology-first sport. This category of participatory sport covers a wide range of activities – among them windsurfing. Like some other sports initially relying on the development of technological equipment, it spread across the world from California. Technology-first sport is positioned as a useful lens, and this is applied to windsurfing showing the value of exploring a sport’s development from this perspective. Distinctive elements of windsurfing’s early history are explored that relate to its rapid growth being intimately linked to technological evolution, intellectual property battles and globalisation processes. The genesis of the sport is contextualised in terms of favourable Californian circumstances and the trajectory of the American plastics industry at the time. Its diffusion across 1970s Europe featured intense technological and market competition which created a rapid evolution of the sport before consolidation. Distinct periods of evolution from 1970 to 1990 are evaluated. These include diffusion processes and the influence of national socio-political factors as it spread to Eastern Europe and to China. A final reflection of the present-day technology fragmentation of windsurfing further reinforces how use of a technology-first sport lens has value.

Development of technological equipment for changing components of freight car trolley sheet-spring set

Development of technological equipment for changing components of freight car trolley sheet-spring set

Properties of Fine-Grained Concrete Mixtures during the Construction of Monolithic Structures

The article presents the results and methods of studying the rheological properties of fine-grained concrete mixtures with various additives, as well as the regression equation obtained by calculations using the apparatus of mathematical analysis, which shows the significance of the parameters included in the process of compaction of the ICZB. These data are necessary for the correct design and selection of sealing mechanisms in order to obtain the design physical and mechanical properties of ICZB. In many regions of the world there is an acute shortage of high-quality raw materials for large aggregate in conventional concrete, which necessitates its transportation over distances from 400 to 1000 km. In this regard, the cost of one cubic meter of coarse aggregate in many regions is 2-3 or more times higher than the cost of sand, the deposits of which are more common. In addition, obtaining the desired fractions of quality aggregates requires artificial addition and fractionation of the resulting granules. The experience of using ICZB for the manufacture of parts and structures at the plants of ZHBK gave positive results, but in mass construction (hydraulic), he did not get spread due to insufficient study of physical and mechanical properties, weak efficiency of existing vibration equipment, insufficient development of new technological equipment for laying and sealing. In this regard, we believe that the research aimed at studying the physical and mechanical properties of ICZB and the further development of technological equipment, methods of laying and sealing for their widespread implementation, determine the relevance of this problem.

An Open-Circuit Method to Control the Hysteresis Parameters of Rare-Earth Permanent Magnets

Abstract—The peculiarities of application of the open-circuit method and prospects for development of technological equipment for monitoring the hysteresis parameters of permanent magnets from highly coercive hard magnetic material have been considered using complex-shaped samples in the pulse magnetic field. The advantages of the open magnetic circuit method and problems that occur during the development of technological equipment have been shown. Based on an analysis of foreign and domestic publications, it has been concluded that the direction is promising. The information on design features, characteristics of the developed equipment for processing control over permanent magnets from hard magnetic materials have been presented.

Development of Technological Equipment for RBMK Service-Life Extension

This article is devoted to the solution of the now urgent problem of the aging of the RBMK-1000 graphite stack (bending of the graphite columns as a result of cracking of the graphite blocks under the action of temperature and exposure to radiation). The successful work performed by a group of specialists from the Diakont Company Group on restoring the service-life characteristics of the first two power-generating units at the Leningradskaya NPP is considered as an example. Laying bare the crux of the main stages and particulars of the technological process, considerable attention is given to the principle of operation, technical possibilities, and rigging of unique equipment produced by the Diakont. The development of a complete rigging complex for restoring the service-life characteristics of the reactor plant is given together with a detailed description of the operating principles of each type of equipment.

Fundamental physicochemical regularities of the chemical vapor deposition of nickel oxide layers

Physicochemical regularities of the chemical vapor deposition (CVD) of nickel oxide layers in the (EtCp)2Ni–O3–O2–Ar reaction system at a reduced pressure were studied. Dependences of growth rate of NiO layers on deposition temperature, linear gas flow velocity, and roughness were derived. A mass-spectrometric study of the composition of the reaction gas phases formed in these systems provided evidence about the fundamental physicochemical regularities of the CVD process, which is important for solving applied problems associated with the development of technological equipment and industrial technology for deposition of NiO layers.

Research, development and embodiment of multifunctional vortex apparatus

Despite the great number of publications related to the research and development of technological equipment with active hydrodynamic modes, little attention was paid to multifunctional vortex devices with cross-swirling flows (VDCRFC) with a cylindrical working box, having controlled active hydrodynamics and mode-design features, which enable to expand their functionality and apply them in many technological processes. The article analyzes possible hydrodynamic conditions and characteristics of the embodiment of VDCRFC for the separation of solids, based on a mathematical model of hydrodynamics proceeding from the angular momentum conservation law, allowing with a sufficient accuracy to calculate and predict the main mode-design parameters and characteristics of the device at the design stage. The article presents the results of theoretical and experimental studies, enabling to choose the most effective hydrodynamics and to embody constructively the vortex apparatus for specific processes, taking into account the specific characteristics of the latter. The examples of alternatives of the embodiment of the vortex devices are given, depending on the functionality and features of the operating conditions

The evolution of ultrasound in rheumatology

Musculoskeletal ultrasound is a powerful tool not only for evaluating joint and related structures but also for assessing disease activity. Ultrasound in rheumatology has rapidly evolved and been incorporated into routine clinical practice over the past decade. Moreover, technological development of equipment has made it more accessible for rheumatologists. We present a review of advances in ultrasound in rheumatology, focusing on major chronological developments.

Numerical modeling of the spill over an impermeable soil

All kinds of hydrodynamic processes in the overwhelming majority of cases can have adverse consequences from the point of view of ecology and economics.This requires the development of adequate measures to organize the elimination of the consequences of such events. Mathematical modeling of spills has applied importance for the development of technological equipment designed to reduce the impact of consequences of spills and its prevention.