Flipped classrooms have been extensively used by many educators all over the world and are being seen as an alternative to the traditional classroom-based teaching-learning practices. As for traditional classrooms, face-to-face learning has not brought the personalization of learning capacity, time, attitude, behavior and interests to learners and has not exposed them to experimental activities. The flipped classrooms, on the other hand, enable students to be flexible in their learning and offer more time to go through videos, lectures posted on the Internet, which helps students to acquire the lessons through online learning systems. Flipped classrooms help create environment for more interaction between learners and instructors/facilitators, especially by creating the face-to-face conversations more interactive. However, teaching using flipped classrooms requires adequate additional resources such as; the effective online learning systems, databases, appropriate learning contents and methods, plan, presentations (in various forms like PowerPoint, word, scrom, video, audio) and most importantly minimum technical knowledge for both learners and instructors to use varieties of tools. This paper presents the construction of an environment supporting students to take part in an online activity before and after face-to-face interaction and organization of experimental teaching with the process of learning in groups based on the model of flipped classrooms to facilitate active learning. The quantitative results at the end of the course showed that the flipped learning is highly preferred and useful pedagogical approach when compared to those traditional methods that fostered better learning attitude and behaviors.

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Flipped classrooms have been extensively used by many educators all over the world and are being seen as an alternative to the traditional classroom-based teaching-learning practices. As for traditional classrooms, face-to-face learning has not brought the personalization of learning capacity, time, attitude, behavior and interests to learners and has not exposed them to experimental activities. The flipped classrooms, on the other hand, enable students to be flexible in their learning and offer more time to go through videos, lectures posted on the Internet, which helps students to acquire the lessons through online learning systems. Flipped classrooms help create environment for more interaction between learners and instructors/facilitators, especially by creating the face-to-face conversations more interactive. However, teaching using flipped classrooms requires adequate additional resources such as; the effective online learning systems, databases, appropriate learning contents and methods, plan, presentations (in various forms like PowerPoint, word, scrom, video, audio) and most importantly minimum technical knowledge for both learners and instructors to use varieties of tools. This paper presents the construction of an environment supporting students to take part in an online activity before and after face-to-face interaction and organization of experimental teaching with the process of learning in groups based on the model of flipped classrooms to facilitate active learning. The quantitative results at the end of the course showed that the flipped learning is highly preferred and useful pedagogical approach when compared to those traditional methods that fostered better learning attitude and behaviors.

Radio Direction Finding system is a system that determines the direction or coordinates of radio signal sources. The main function of this system is to determine the direction of arrival (DOA) of an incident radio wave. DOA information plays an important role in array signal processing and has many applications in communications, radar, seismic survey... In this paper, with the simulated signal data set obtained at the linear antenna array (ULA), the Long Short-Term Memory (LSTM) network model is used to estimate the DOA. The performance of the method is evaluated based on the RMSE parameter and compared with MUSIC, DNN algorithms in different cases such as: deviation of incident angle of radiation sources, signal-to-noise ratio (SNR).