A model of circular economy in the relationship with sustainable development, recycling, and life cycle: Bibliometric analysis

This paper is carried out by conducting systematic mapping that focuses on the circular economy (CE) theme using bibliometric analysis. The purpose of this study is to provide a comprehensive view of circular economy research that is based on bibliometric data from 2017 to 2021. The data is collected from Scopus using VOSviewer software. Network visualization and density visualization are used in this study. The findings conclude that: (1) the publication trend of the circular economy continues to increase; and (2) the author with the most link is Mangla, S.K. with 15 links, and the author with the most research related to a circular economy is Liu, Y. with 16 papers/research. It is also found that there are 3 big themes that are close to a circular economy, namely sustainable development, recycling, and life cycle. This indicates that the opportunity to examine circular economy while associating it with variables outside of sustainable development, recycling, and the life cycle is still very large. The countries that have conducted the most research on circular economy is (1) United Kingdom (218 papers); (2) Italy (161 papers); and (3) China (161 papers).

Introduction to Blockchain: An Emerging Technology

It is only a matter of time before technology emerges to open up a whole new world of opportunities. For example, the invention of the Internet was a development like this that changed the world in almost every theory. Blockchain technology is also one of the emerging technological advances that is expected to change the way transactions are conducted, thus affecting a wide range of potential applications. Blockchain is a distributed software network that works both as a digital logger and a method that allows secure transfer of assets without a mediator. Just as the Internet is a technology that facilitates the flow of digital information, blockchain is a technology that facilitates the digital exchange of digital value. Anything from coins to land titles to votes can be token, stored, and exchanged via a blockchain network.

MIMO Relaying UAVs Operating in Public Safety Scenarios

Methods to implement communication in natural and humanmade disasters have been widely discussed in the scientific community. Scientists believe that unmanned aerial vehicles (UAVs) relays will play a critical role in 5G public safety communications (PSC) due to their technical superiority. They have several significant advantages: a high degree of mobility, flexibility, exceptional line of sight, and real-time adaptative planning. For instance, cell edge coverage could be extended using relay UAVs. This paper summarizes the sidelink evolution in the 3GPP standardization associated with the usage of the device to device (D2D) techniques that use long term evolution (LTE) communication systems, potential extensions for 5G, and a study on the impact of circular mobility on relay UAVs using the software network simulator 3 (NS3). In this simulation, the transmitted packet percentage was evaluated where the speed of the UAV for users was changed. This paper also examines the multi-input multi-output (MIMO) communication applied to drones and proposes a new trajectory to assist users experiencing unfortunate circumstances. The overall communication is highly dependent on the drone speed and the use of MIMO and suitable antennas may influence overall transmission between users and the UAVs relay. When the UAVs relaying speed was configured at 108 km/h the total transmission rate was reduced to 55% in the group with 6 users allocated to each drone.

Analyzing Implementation Architecture through measures of Social Network Analysis: A case study

We present a case study of an interpretation and application of the measures in the Social Network Analysis (SNA) to comprehend the implementation architecture of a software system. The architectural structure derived from the dependencies of programming elements is considered a social network. Then, the SNA measures such as degree distribution, centrality, clustering, community, and ego network are applied to the software network. The Gephi tool has been used to collect the values of those SNA measures and also for visualization. The values obtained for those measures were interpreted in the terms of potential application area of the software engineering. The interpretation of SNA measures from the case study reveals that it is useful for the developers to enhance their comprehension about the organization of program elements and source.

Global Research Trends on Prostate Diseases and Erectile Dysfunction: A Bibliometric and Visualized Study

ObjectivesTo identify the cooperation of authors, countries, institutions and explore the hot topics’ prospects regarding research of prostate diseases and erectile dysfunction (ED).MethodsPublications on research of prostate diseases and ED were retrieved from the Web of Science Core Collection (WoSCC). Bibliometric analyses were performed using VOSviewer and CiteSpace software. Network maps were generated to evaluate the collaborations between different authors, countries, institutions, and keywords.ResultsA total of 2,599 articles related to study of prostate diseases and ED were identified. We observed gradually increasing in the number of publications from 1998 to 2016, and the trend was to be relatively stable in the past 3 years. Journal of Sexual Medicine (243 papers) owned the highest number of publications and Journal of Urology was the most co-cited journal. Mulhall John P (52 papers) was the top most productive authors and Mcvary Kebin T with the largest numbers of citations (1,589 co-citations) during the past decades. There were active collaborations among the top authors. The USA was the leading contributor in this field with 1,078 papers. Active cooperation between countries and between institutions was observed. The main hot topics included matters related to erectile dysfunction, prostate cancer, quality-of-life, radical prostatectomy, sexual function, and BPH.ConclusionBibliometric analysis provides a comprehensive overview of the development of scientific literature, allowing relevant authors and research teams to recognize the current research status in this field and at the same time provide a reference for formulating future research directions.

Visual Methods of Television Content in the Christmas and New Year Period

In the research were analyzed visual techniques that were used to fill the content of Ukrainian TV channels in the period from the beginning of December to the end of January. The Christmas and holiday season are not officially included in a separate category of TV programming, but the season is fundamentally important for attracting the viewer’s attention and for setting the further price of airtime for advertisers. The article is one of the first attempts to consider this aspect broadly/extensively and to outline the current vectors of studying the specifics of the program content of TV channels in the period of Christmas and holiday season, therefore this article is promising for the applied social communications area. In order to describe the main visual techniques, that are used in television content, the authors emphasize on their diversity, also they leave space for the further analysis of other nonverbal and verbal elements of the screen communication, that are used during festive period. Researchers have selected the TV channels logos, the program broadcast in the night from December 31.12.20 to January 01.01.2021, as well as other screen products of the different genres, telefilms and movies, that were shot and presented on TV broadcast in different years. Among the main research methods were used the following: content-analysis, which contributed to a thorough study of the software network of TV channels broadcasting, observation and comparison, which helped to outline the common and different characteristics of software products and broadcasts in general, induction method, which helped to form the key screen concepts. The suggested conclusions provide grounds for the statement, that the choice of content for filling TV channels during festive season is based on commercial inquiries, creative and technological resources of the television producers. In addition, the authors mention the segment of Christmas and New Year congratulations of head of state as promising for the further research.

CONSTRUCTO TEÓRICO PARA EL APRENDIZAJE TECNOLÓGICO EN LA ENSEÑANZA DE LA MATEMÁTICA EN INSTITUCIONES EDUCATIVAS

El presente artículo, es parte de una investigación del Doctorado en Educación de la UNERMB, y tiene como objetivo orientar el desglose del constructo teórico requerido para el abordaje del aprendizaje tecnológico, como elemento básico en la enseñanza de la matemática en instituciones educativas del Municipio “El Paso Cesar", Colombia, con un total de 6 Instituciones educativas, pero haciendo énfasis en el I. E. Benito Ramos Trespalacios, con un total de 60 docentes. Cabe destacar que la investigación está soportada por el uso de las Tic’s, la cual (Ballesta, 2011 pp 33), transforman la información en conocimiento significativo, mediante un conjunto de herramientas tecnológicas que se procesan en la red de internet o de Software previamente instalados y configurados en plataformas de aula virtuales en los espacios destinados para su ejecución dentro de las escuelas. Por otro lado, la investigación, se desarrolló en un contexto de investigación mixta, que abarcaría los enfoques cualitativo y cuantitativo, debido a la necesidad de buscar teorías de ambos paradigmas, ya que se trata de construir un referente o constructo teórico completo, con base en la conceptualización del problema a resolver mediante el uso de la plataforma informática virtual de la red de internet o los espacios de aprendizajes tecnológico disponibles en las instituciones educativas, dentro de las principales conclusiones se tiene que las institución antes mencionada, deberían establecer estrategia pedagógicas que les lleven a la gestión del conocimiento y aprendizaje tecnológico y para ello, es recomendable organizarse y trabajar en equipo, para que cada uno de ellos demuestre su dominio cognitivo y práctico con el uso del computador y sus aplicaciones tecnológicas de la asignatura y de ésta forma, apoye al compañero con debilidades en el área computacional.Palabras claves: Constructo teórico. Aprendizaje tecnológico, Enseñanza de la Matemática.THEORETICAL CONSTRUCTION FOR TECHNOLOGICAL LEARNING IN THE TEACHING OF MATHEMATIC IN EDUCATIONAL INSTITUTIONS.ABSTRACTThis article, is part of an investigation of the Doctorate in Education of the UNERMB, and aims to guide the breakdown of the theoretical construct required to address technological learning, as a basic element in the teaching of mathematics in educational institutions of the Municipality " El Paso Cesar ", Colombia, with a total of 6 educational institutions, but with emphasis on IE Benito Ramos Trespalacios, with a total of 60 teachers. It should be noted that the research is supported by the use of Tic's, which (Ballesta , 2011 pp 33), transform the information into meaningful knowledge, through a set of technological tools that are processed in the Internet or Software network previously installed and configured in virtual classroom platforms in the spaces destined for execution within schools On the other hand, the research was developed in a context of mixed research, which would cover qualitative and quantitative approaches, due to the need to search for theories of both paradigms, since it is about building a complete theoretical reference or construct, based on the conceptualization of the problem to be solved through the use of the virtual computing platform of the network Internet or technological learning spaces available in educational institutions, within the main conclusions that the aforementioned institutions have to be established, they should establish pedagogical strategies that lead them to knowledge management and technological learning and for this, it is advisable to organize and work as a team, so that each of them demonstrates their cognitive and practical domain with the use of the computer and its technological applications of the subject and in this way, support the partner with weaknesses in the computational area.Keywords: Theoretical construct. Technological learning, Mathematics Teaching.

Identifying Key Classes Algorithm in Directed Weighted Class Interaction Network Based on the Structure Entropy Weighted LeaderRank

Identifying key classes can help software maintainers quickly understand software systems. The existing key class recognition algorithms consider the weight of class interaction, but the weight mechanism is single or arbitrary. In this paper, the multitype weighting mechanism is considered, and the key classes are accurately identified by using four kinds of interaction. By abstracting the software system into the directed weighted class interaction network, a novel Structure Entropy Weighted LeaderRank of identifying key classes algorithm is proposed. First, considering multiple types and directions of interactions between every pair of classes, the directed weighted class interaction software network (DWCIS-Network) is built. Second, Class Entropy of each class is initialized by the software structural entropy in DWCIS-Network; the Structure Entropy Weighted LeaderRank applies the biased random walk process to iterate Class Entropy. Finally, the iteration is completed to obtain the Final Class Entropy ( FCE ) of each class as the importance score of each class, top- k classes are obtained, and key classes are identified. For two sets of experiments on Ant and JHotDraw, our approach effectively identifies key classes in class-level software networks for different top- k of classes, and the recall rates of our approach are the highest, 80% and 100%, respectively. From top-15% to top-5%, the precision of our approach is improved by 13.39%, which is the highest in comparison with the precisions of the other two classical approaches. Compared with the best performance of the two classical approaches, the RankingScore of our approach is improved by 16.51% in JHotDraw.