Title	Theoretical Aspects of Blockchain Technologies in The Sphere of Education
Author	Antonina Liashkevych, Mariana Babyshena, Oleksandr Vorokhaev, Volodymyr Pylypiv, Oksana Oliinyk, Nelia Kinakh
Citation	Vol. 21  No. 3  pp. 185-190
Keywords	Information technology, pedagogy, Higher Education, Education System, Technologies Blockchain, Methodology.

Title	Development of the Agro-Industrial Complex for Improving the Economic Security of the State
Author	Iaroslav Petrunenko, Borys Pohrishcuk, Maryna Abramova, Yurii Vlasenko, Vasyl Halkin
Citation	Vol. 21  No. 3  pp. 191-197
Keywords	Economy, Economic Security, Food Security, Agro-Industrial Complex, Agriculture, Employment, Labour Productivity, Export.

Title	The Importance of International Transport and Logistics Infrastructure in the Economic Development of the Country: The Case of the EU for Ukraine
Author	Yuliia Atamanenko, Olena Komchatnykh, Sukhomlyn Larysa, Didkivskyi Viacheslav, Borys Sulym, Oksana Losheniuk
Citation	Vol. 21  No. 3  pp. 198-205
Keywords	EU Transport System, EU Logistics Efficiency, Intermodal Transport Market, Sustainability of Transport Infrastructure.

Title	Sentiment Analysis of COVID-19 Tweets: Impact of Pre-processing Step
Author	Rami Ayadi, Osama R.Shahin, Osama Ghorbel, Rayan Alanazi, and Anouar Saidi
Citation	Vol. 21  No. 3  pp. 206-211
Keywords	C.ovid-19, Sentiment Analysis, Covid-19 Tweets, SVM, KNN, pre-processing step, Arabic Language