The mathematical model of rotating electrohydrodynamic flows in a thin suspended liquid film is proposed and studied. The flows are driven by the given difference of potentials in one direction and constant external electric field E out in another direction in the plane of a film. To derive the model, we employ the spatial averaging over the normal coordinate to a film that leads to the average Reynolds stress that is proportional to ͉E out ͉ 3 . This stress generates tangential velocity in the vicinity of the edges of a film that, in turn, causes the rotational motion of a liquid. The proposed model is used to explain the experimental observations of the liquid film motor.
The mathematical model describing the stationary natural pH-gradient arising under the action of an electric field in an aqueous solution of ampholytes (amino acids) is constructed and investigated. The model is a part of a more general model of the isoelectrofocusing process. Investigation is based on the approximation of a weak solution by the piecewise continuous non-smooth functions. The method can be used for solving classes of problems for ODEs with a small parameter at higher derivatives and the turning points.
The actual task of dairy enterprises is to increase the efficiency of resource use, optimize business processes, reduce water and energy consumption, deploy a reliable traceability system that improves transparency, safety and product quality, providing detailed information about the product for the consumer. The specific task for dairy farms is monitoring the behavior of cows and their maintenance in order to improve their well-being and prevent morbidity. In turn, it will lead to better enterprise management, increasing of productivity and quality of production. It is possible to solve the set of tasks only with the help of digital technologies, which are vital for achieving the competitive advantage of dairy farms. It requires the elaboration of enterprise architecture for optimizing many disparate processes in an integrated environment, which will achieve the right balance between IT efficiency and business innovation. Enterprise architecture provides a strategic context for the development of IT systems in response to the ever-changing needs of the dairy industry environment. The research presents the “As Is” model of the architecture of typical dairy farms, developed using the ArchiMate language. As a result of its analysis, the discrepancy between business and IT requirements was found. An insufficiently high level of application of digital technologies was noted, allowing only to identify animals, but not giving the opportunity to determine their condition, to signal about its change and the need for urgent measures. The insufficient level of application of digital technologies does not provide support for decision-making by employees and managing specialists, and also does not allow to monitor in real time the parameters of the conditions of the animals, the quality of the products, the preparation of balanced feed and their individual dosing, automatic milking, storage, sorting and packaging products. The conducted studies are the basis for the creation of the standard architecture “To be” of dairy farms using modern digital technology and sensor systems for providing high quality and efficiency of production of dairy products.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.