Search

The issue related to the possibility of applying the filtration process of young beer with the use of experimental microfiltration polymer semi-permeable membrane elements was considered. It was shown that under modern conditions, it is expedient to use membrane processes of young beer filtration in the brewing industry. The process of membrane treatment of beer can be carried out at the stage of pasteurization of young beer in a cold way. Such actions can be directed to preserve the organoleptic parameters of the final product ‒ filtered beer. An experimental setup for the study of the main technological parameters of membrane processing of young beer was presented. The results of experimental studies of the influence of baric and temperature modes on the performance of nuclear microfiltration polymer membranes were shown. Rational parameters of pressure (0.03–0.05MPa), duration (8–10s-1), and temperature (3...6°С) of the process of membrane filtration of young beer using nuclear microfiltration polymer membranes were determined. The qualitative characteristics of filtered beer obtained by membrane methods were explored. The comparative characteristic of the results of the studies of the qualitative component of resulting beer after microfiltration according to the known requirements and standards for organoleptic indicators was presented. It is found that in terms of filtration rate, selectivity, yeast residue, and other characteristics, nuclear microfiltration polymer membranes are promising for the implementation of the process of microfiltration of young beer. These studies proved the feasibility of further research into improving the process of membrane processing of beer and technical equipment of the beer production line with the development of new equipment.

The object of research: the process of membrane concentration of buttermilk using methods of removing the polarizing layer on the membrane surface. Investigated problem: determination of the effectiveness of methods for eliminating the polarization layer on the membrane surface during membrane concentration of buttermilk. Main scientific results: The results of experimental studies on methods of removing the polarization layer to increase the productivity of ultrafiltration equipment in the process of membrane concentration of buttermilk are presented. Mathematical models are proposed based on the regression equation of a factorial experiment using the elimination of the polarization layer on the membrane to determine the rational operating parameters of the membrane concentration of buttermilk. These parameters were determined: pressure – 0.4 … 0.5 MPa, buttermilk temperature – 40 … 50 °С, speed of pulsating flows – 1.5 … 1.7 m/s, frequency of bubbling of raw materials – 0 , 10 … 0.15 min-1, bubbling pressure – 0.56 … 0.58 MPa. A comparative analysis of the application of the method of vibrational mixing and bubbling of separated non-fat dairy raw materials to eliminate the formation of a polarization layer on the surface of membranes in the process of membrane concentration is presented. Based on the obtained quantitative and qualitative characteristics of the ultrafiltration products, it can be seen that vibrational mixing and bubbling of the processed buttermilk equally intensify the process of membrane concentration of buttermilk. The area of practical use of the research results: enterprises of the dairy industry of the food industry, engaged in waste-free processing of dairy raw materials and its by-products. An innovative technological product: devices for reducing the polarization layer, allowing to increase the performance of membranes in the process of membrane concentration of buttermilk. Scope of application of the innovative technological product: waste-free processing of dairy raw materials at dairies and dairy plants and other food industry enterprises.

In this paper an approach to non-contact remote assessment of heart rate using a standard video camera is discussed. A method for measuring heart rate is developed. This method includes the stages of data accumulation and processing, spectral analysis of video images and analysis of the obtained information to calculate the results. The difference between the average pulse measuring by contact sensors and our approach does not exceed 3–4 bpm. The developed software can be used for remote monitoring of the functional status of a person.

We determined factors that arise during an arc discharge and detected possibility of their use to accelerate protection against arc closure. This enables creation of a combined device for accurate determination of an arc discharge. In particular, we can expand the spectrum of sensitivity of an optical sensor by the use of ultraviolet radiation without its replacement. We considered possibility of acceleration of response of protection against arc closure operation due to refusal of its blocking with relay circuits for maximum current protection and reduction of an influence of solar radiation on operation of PAC (protection against arc closure). We substantiated possibility of development of a more advanced device for protection against arc circuits, which gives possibility to expand the spectrum of the optical sensor in the region of ultraviolet radiation. We proposed the solution of the problem of increasing of sensitivity of protection against arc closure. This is possible by converting the ultraviolet radiation into a visible part of the optical spectrum, which will expand the spectrum of sensitivity of the optical sensor to the region of ultraviolet radiation and, accordingly, increase its sensitivity. This is due to the fact that 70 % of an arc discharge radiation falls on the ultraviolet region and only 15 % on the visible and infrared spectra of the optical radiation. The obtained results give grounds to assert about possibility of realization of a device of combined protection for determination of arc circuits in industrial production, as well as expansion of spectral sensitivity of optical sensors. In addition, we developed a combined device for determination of an arc discharge through a use of an ultrasound system. Known developments devoted to determination of location of an arc discharge by comparing intensity of a signal from a flash at both ends of the ten-meter optical light conductor are characterized by the fact that the maximum difference between the arrival time of signals from a flash point to sensors at the ends of the optical fibers is 5ns. This is a very low temporal level compared to the light conductor length at the velocity of 300,000 km/s. The system proposed in this study uses the sound velocity, which reaches 342/s, to determine an arc discharge, which simplifies a time measurement device for determination of a short circuit greatly and increases accuracy of time measurement by three orders of magnitude (10 3 ).

We proved the need to create equipment for the implementation of a combined process of peeling the tubers of Jerusalem artichoke. A combined peeling process is proposed, which is based on a combination of thermal and mechanical effects on the peeled product. An experimental installation was designed to study the process of thermal treatment of Jerusalem artichoke. It is proven that an increase in steam pressure and duration of the process of thermal treatment lead to the increase in depth of the thermal treatment of the surface layer of Jerusalem artichoke and reduce the efforts required to separate the rind from the tuber. We determined that an increase in duration of the process of mechanical post-peeling increases the percentage of peeled tubers of Jerusalem artichoke, but results in growing losses of raw material. It was established that reducing the effort required to separate the rind of Jerusalem artichoke at thermal treatment makes it possible to reduce duration of the process of mechanical post-peeling. We determined that an increase in depth of the thermal treatment of the surface layer of Jerusalem artichoke leads to increasing losses of raw material. It was proven that the tubers of Jerusalem artichoke, which have a longer storage period, require an increase in duration of the process of their mechanical post-peeling to ensure the required quality of peeling. We determined rational parameters of the combined process of peeling Jerusalem artichoke, which enable to significantly intensify and mechanize the peeling process, to reduce losses of raw material and to improve quality of peeling

Elaboration and improvement of the process of raw material cleaning is an urgent scientifically technical process. The one of most prospective directions of vegetables cleaning process intensification is the elaboration of combined methods of their cleaning. The improvement of tubers cleaning process is based on the combination of thermal processing of sunroot tubers by steam and the process of further mechanical additional cleaning. The experimental studies of the influence of parameters of the process of sunroot thermal processing by steam on a tuber surface layer transformation were carried out. The influence of the steam pressure and the duration of the process of tubers thermal processing on the depth of the thermal processing of tuber surface layer and also on the effectiveness of the peel separation were studied. At the same time there were realized the studies as to the influence of the duration of tubers mechanical additional cleaning process on cleaning quality parameters. The experimental apparatus and correspondent method that allow to carry out investigations of the combined process of sunroot tubers cleaning with a possibility to determine the influence of all its parameters on the percent of raw material losses and cleaning quality were elaborated. Rational regimes of the combined process of sunroot tubers cleaning were established.

This paper discusses the essentials of engineering discourse in the structure of the ESP training at Southern Federal University (SFU) (Taganrog, Russia). The purpose of this paper is to justify critical rethinking of existing programs of technical students training in foreign languages at SFU taking into account the increasing role of engineering discourse in the professional socialization of future engineers and to enable them to integrate into the international professional community. The undertaken analysis strives to find the way to change the teaching practice of ESP. There are two levels of foreign language acquisition at SFU. At the first level students study any foreign language in a context of the general language. And at the second level they get conceptual knowledge to acquire scientific and professional terminology of any foreign language in order to become a professional language personality. To support these objectives a series of text books on ESP courses (Computer Engineering, Radio Engineering, Electronic Engineering etc.) have been developed at the foreign languages department SFU. The textbook "Computer Engineering" has been considered in details in this article. The authors have suggested directions in which the discourses of engineering education and practice need to change so that the engineering profession can achieve the goals stated in its professional codes.

The article investigates the method and algorithm for signs detection of ischemic disorders of the cardiovascular system in the course of everyday human activities on the basis of electrocardiosignal continuous recording. Methods for ST-segment of electrocardiosignal detection in each cardiac cycle and the formation of integral informative form features derived from the spectral components in the basis of Walsh functions calculation are purposed. An algorithm for ST-segment distortion classifying to non-specific and ischemia-caused is developed. Given algorithm, in contrast to known analogs, allows to perform a detailed classification of various types of ischemic and non-specific ST-segment changes and can be implemented using portable devices and software applications producing assessment of the human body in real time.

Destination image is a critical factor to potential travelers. Many say that Hurricane Katrina was the costliest and one of the deadliest hurricanes in the history of the United States. The purpose of this study was to investigate the tourist destination images of leisure travelers to New Orleans before and after the storm. Further, this study assessed the influence of media exposure and geographic point of origin on perceptions. The results of this research provide fundamental implications for strategic image management that can assist in designing and implementing marketing campaigns to enhance tourism destination images and to overcome prevailing negative ones.