Scientific journal of the Ternopil national technical university最新文献

{"title":"Rationale for dosing and mixing germinated flax seeds with wheat flour","authors":"Svitlana Krayevska, V. Piddubnyi, N. Forostyana, Igor Stadnyk, Yuliya Pankiv","doi":"10.33108/visnyk_tntu2022.01.046","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.01.046","url":null,"abstract":"The reasons of low quality and changes of the diet are analyzed, the nutritional value of bakery products and the use of non-traditional sources in new developments of high value technologies are considered. The general scheme of bakery products production technology is given, where the parameters of the kneading process and the connection between the factors influencing the complex system of dough formation and the characteristics of the finished product are revealed.Ways of using germinated flax seeds in recipes based on wheat and rye-wheat bread with preservation of high organoleptic characteristics are proposed and selected. The analysis and the ways of regulation of structural and mechanical properties of dough on the basis of factors of influence are given: – usage of thick rye leaven and first-class flour 30:70 and supreme quality wheat flour with addition of germinated flaxseed (15% of the mass of wheat flour); – usage of thick rye leaven and first-class flour 50:50 with addition of germinated flaxseed (10% of the mass of wheat flour); – the usage of thick rye leaven and first-class flour 50:50 with addition of 20% of germinated flaxseed and also adding supreme quality wheat flour (15% of the mass of wheat flour). The even distribution of GFS in flour due to efficient mixing in determining the nature of the process is considered. Influential parameters were chosen: duration of mixing and non-variable factor – frequency of revolutions of the working body of the mixer. The quality of mixing of the mixture based on the key component – GFS – was evaluated. The quality of mixing was determined by the coefficient of variation of the key component of the mixture, i.e. GFS. Mixing curves are constructed – dependence of the coefficient of variation on the duration of mixing and the optimal mixing time is determined, which corresponds to the first minimum value of the coefficient of variation of the mixing curve. Three stages of kneading are distinguished: I (0…60 s) – zone of intensive mixing; ІІ (60…120 s) – zone of slow mixing and ІІІ (120…180 с) – zone of segregation. The recommendations to be followed for effective mixing of flour with GFS in production conditions are given.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"137 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76693208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the modifier 2-benzofuran-1,3-dione content effect on the heat resistance of epoxy composites","authors":"O. Sapronov, V. Sotsenko, A. Sapronova, Pavlo Vorobiov, S. Smetankin, V. Yatsuk","doi":"10.33108/visnyk_tntu2022.01.055","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.01.055","url":null,"abstract":"The technological aspects of modification of epoxy oligomer DER – 331 to provide improvement of thermophysical characteristics of composite materials and protective coatings based on them are presented. Cold-cured triethylenetetramine TETA hardener was used to crosslink the epoxy binder (q = 10 parts by weight per 100 parts by weight of DER-331 epoxy resin). Thermogravimetric (TGA) and differential thermal (DTA) analysis was performed to study modified composites under the influence of elevated temperatures. A mathematical calculation of the values of the activation energy of thermal destruction to determine the resistance to destruction of chemical bonds under the influence of temperature factor.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84009574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Results of the experimental investigations of fodder beets harvesting technologies","authors":"V. Baranovsky, M. Pankiv, Oleksiy Kukhar, Oleg Gurik, V. Senchishin","doi":"10.33108/visnyk_tntu2022.02.016","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.02.016","url":null,"abstract":"At the first stage of implementing the technology of mechanized harvesting of fodder beets, there are certain difficulties in harvesting them from turning lanes and inter-row passages, which make up 10 to 15% of the field area. In addition, taking into account the specifics of the agrobiological properties of fodder beet root crops, after cutting of the hemlock, a significant number of roots (up to 5%) knocked out of the soil remain in the interrows, which are subsequently crushed by the wheels of the root harvester, that is, lost or damaged. The purpose of the work is to reduce losses and damage of fodder beets during their mechanized harvesting. The description of the technology of dividing the field into corrals and mechanized harvesting of fodder beets and technical means for their implementation is given. It is established that the application of the proposed fodder beet harvesting technology makes it possible to reduce their losses and damages on average from 1.7 to 2.2 times and from 1.5 to 1.6 times respectively.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79404959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling of functional properties of shape-memory alloys by machine learning methods","authors":"O. Yasniy, Vladyslav Demchyk, N. Lutsyk","doi":"10.33108/visnyk_tntu2022.04.074","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.04.074","url":null,"abstract":"Shape-memory alloys are used in various areas of science and industry due to their unique shape memory effect and superelasticity, caused by martensite and reverse transformations. In this study, it is proposed to model the functional properties of shape memory alloys, namely, the dissipated energy range, strain range and stress range using the methods of machine learning. The modeling is carried ou in the specialized data mining software environment called Orange. There were built five models for each dataset by means of method of neural networks, random forest, gradient boosting, AdaBoost and kNN. The respective regression dependencies are obtained and K fold cross-validation with K=5 is performed. The errors and coefficient for R2 determination are calculated as the results of modeling by means of the above mentioned machine learning methods for the range of dissipated energy, stresses and strains on the number of loading cycles. For each physical quantity, the best results in terms of method error are obtained for k-nearest neighbors method.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83666992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using and efficiency manufacturing of polymeric materials parts for gas transportation equipment","authors":"I. Lutsiv, I. Yarema, V. Kobelnyk, Valerij Buhovets","doi":"10.33108/visnyk_tntu2022.01.080","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.01.080","url":null,"abstract":"The paper deals with the applied using of polymeric material parts in gas transportation equipment as well as calculation of their efficiency of manufacturing. In this way basing on the results of previous known researches the basic questions of polymeric material parts using in gas transportation equipment are discussed. The manufactured and tested in practical application parts of gas transportation equipment elements of different purpose are exemplified. The possibilities of such parts using in existing equipment are presented. Much attention is paid to polymeric material parts manufacturing as well as to the calculation of its efficiency. The multi edge devices with kinematic inter tool links are proposed to use them in mechanical machining of such parts. The integral technology efficiency indexes of manufacturing and machining of polymeric material parts for gas transportation equipment are developed. The increase in productivity, accuracy and quality of polymeric material parts machining is being proved.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82092851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematical represantation of the branch kinematics of a transmission with descreteflexible connection","authors":"I. Lutsiv, Taras Dubyniak, O. Manziy, S. Andreichuk","doi":"10.33108/visnyk_tntu2022.02.005","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.02.005","url":null,"abstract":"The paper deals with the mathematical model development of the kinematical behavior of the flexible transmission branch exemplified. A typical example of transmission with discrete-flexible connection can be considered as the movement of the drive elements of the chain. The use of chain gears as a drive for a wide range of technological machines with high requirements in order to ensure a certain law of motion of the executive bodies is the task of studying changes in its kinetic characteristics during operation. It is established that random deviations of the chain step from the nominal are the result of manufacturing inaccuracy elements of transmission and wear during operation. The mathematical model of motion gives an idea of the real interpretation of the kinematics of the chain transmission taking into account the uneven dimensions of individual links. The model makes it possible to present the components of deviations of the transmission movement from the given in two groups: deviations created by the accumulated error of the chain section, and movement. Calculations based on the developed mathematical model show that when the hinges of the sleeve-roller chain are worn by 2.5%, the value of the coefficient of non-uniformity of the transmission increases threefold.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"137 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86647934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Welded truss deformation under thermal influence","authors":"Ya. Shved, Y. Kovalchuk, N. Shynhera","doi":"10.33108/visnyk_tntu2022.01.013","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.01.013","url":null,"abstract":"The article studies some deformation features of the full-scale physical model test of the 2000x400 mm rectangular welded truss at thermal influence ranging from 20 to 160°C. Numerical information based on the values of deformations at seven control points of the truss for chords and nodes was obtained as a result. A computer simulation experiment using SolidWorks software for similar impact parameters on truss was performed. Results comparison of full-scale physical model deformation and computer simulation experiments revealed its similarity. Experimental results can be used in determining the parameters of the stress-strain state of the elements of the trusses under simultaneous force and temperature effects.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"61 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91468183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Project management features in the cybersecurity area","authors":"Mariia Stadnyk, A. Palamar","doi":"10.33108/visnyk_tntu2022.02.054","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.02.054","url":null,"abstract":"This paper has presented detailed comparative analysis of the project manager work on IT and cybersecurity projects by each PMI project management process group: initiating, planning, executing, monitoring and controlling, and closing. Based on the results, a list of project management peculiarities in cyber security was obtained, and a list of industry knowledge and requirements for a cyber security manager was presented. Proposals for the application of tools and techniques for each process of the cyber security project were formed in accordance with the features.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87270342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progressive web technology-based improvement of the distance learning adaptive system","authors":"Mykola Pikuliak, Ihor Lazarovych, Maksym Usyk","doi":"10.33108/visnyk_tntu2022.01.118","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.01.118","url":null,"abstract":"An analysis of the well-known distance education systems was made, which allowed us to highlight their advantages and disadvantages and identify some ways to improve the program by adding adaptive functionality and interactivity, aimed at improving the educational process quality. An interface for working with the system for different groups of users (students, teachers, developers) has been developed whose use allows you to download study materials and test tasks conveniently, to edit and adapt some meaningful links between information sections (Units), to pass training and test control, to form final reports of success and recommendations for further learning steps. The multi-set method of assessing the level of study of content units was described and the adaptive functionality of forming the content of educational lectures for review or in-depth mastering of the theoretical content was presented, which allows taking into account the initial level of student knowledge and his/her abilities to acquire new skills. The software has been improved with a system based on PWA (Progressive web app) technology, which has allowed us to realize such advantages of web applications as speed, convenience, and attractiveness. A technology of text questions and correspondent information units connection was proposed which was based on the theory of multiple approach use which has provided us with the mathematical determination of the indices of the unmastered pieces of knowledge which generate the text part of the adaptive training step. Implementation of PWA technology was performed using the following software tools Service Worker, Web App Manifest, HTTPS, and Application Shell, which allowed to perform client caching offline, speeded up the process of downloading and displaying graphic elements of the web page, provided the use of the proposed resource as a regular mobile application. It has made it possible for easy access to the system to be obtained as well as the system resource use to be reduced.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"207 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82690752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the working capacity of the operating body suspension functional-transporting machine","authors":"Andrii Babii, V. Aulin, M. Babii, Bohdan Levytskyi","doi":"10.33108/visnyk_tntu2022.01.005","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2022.01.005","url":null,"abstract":"The investigation concerning the identification of the effectiveness of reducing the oscillations of the sprayer boom developed by independent pendulum suspension is carried out in this paper. In order to achieve this goal, the field microrelief, which creates kinematic perturbation of the rod oscillations is simulated. Dynamic model of rod mass oscillations on this suspension is also constructed, numerical solutions for a given sprayer operation mode are obtained, and numerical results are analyzed.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85974190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}