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The authors were surprised by the number of articles that used or cited the computer algebra system DERIVE more than 10 years after it was discontinued and developed a small bibliographic study about it, published in 2019. Now they address in a similar way the very successful dynamic geometry system GeoGebra that, although created 20 years ago, later than the other great dynamic geometry systems (Cabri Geometry II, The Geometer’s Sketchpad and Cinderella), has now dozens of millions of users around the world. Not surprisingly, the cites to GeoGebra in the well known bibliographic databases Scopus, Web of Science and Google Scholar show an impressive growth. [ABSTRACT FROM AUTHOR]

The author began working with computer algebra systems (CAS) in the 80s to perform effective computations for his Ph.D Thesis in algebra. He thought at that moment that there would be an explosion in the use of CAS for research and teaching (at all levels of education). Surprisingly, its use in secondary education is still scarce. This article details some personal reflections on elementary mathematics questions (from both the mathematical and the computational points of view) and proposes a classification of such questions, illustrated with several examples. It is focused on some of the present impressive capabilities of CAS, underlining their abstraction levels in some eye-catching examples. The article is mainly aimed at mathematics teachers who are not experts in CA. Nevertheless, it may also be of interest to CAS experts, as it includes reflections on a topic not usually treated: the abstraction level achieved by CAS and its impact in teaching and assessment. [ABSTRACT FROM AUTHOR]

A lockdown was ordered in Spain on March 2020 due to the COVID-19 pandemic. The first author, advised by the second author, developed a tale and video (in Spanish) with a simplified explanation of virus propagation for their teenager son, justifying the need to stay at home. The tale and video relate the spread of the virus to fractal trees and aim to raise awareness about the transmission of the disease. The video is available from the web page of the Instituto de Matemática Interdisciplinar of the first author's university. The code was implemented in Scratch 3 and takes advantage of the "Turtle Geometry" (there is an ulterior version using Maple, available from Mapleprimes). This article includes the English version of the original tale, describes the Scratch 3 code, and details possible derived STEM activities. We plan to experiment them in the classroom during the 2020–2021 academic year. [ABSTRACT FROM AUTHOR]

Unlike most bibliometric studies focusing on publications, taking Big Data research as a case study, we introduce a novel bibliometric approach to unfold the status of a given scientific community from an individual-level perspective. We study the academic age, production, and research focus of the community of authors active in Big Data research. Artificial Intelligence (AI) is selected as a reference area for comparative purposes. Results show that the academic realm of "Big Data" is a growing topic with an expanding community of authors, particularly of new authors every year. Compared to AI, Big Data attracts authors with a longer academic age, who can be regarded to have accumulated some publishing experience before entering the community. Despite the highly skewed distribution of productivity amongst researchers in both communities, Big Data authors have higher values of both research focus and production than those of AI. Considering the community size, overall academic age, and persistence of publishing on the topic, our results support the idea of Big Data as a research topic with attractiveness for researchers. We argue that the community-focused indicators proposed in this study could be generalized to investigate the development and dynamics of other research fields and topics. [ABSTRACT FROM AUTHOR]

Taking the research area of Big Data as a case study, we propose an approach for exploring how academic topics shift through the interactions among audiences across different altmetric sources. Data used is obtained from Web of Science and Altmetric.com, with a focus on Blog, News, Policy, Wikipedia, and Twitter. Author keywords from publications and terms from online events are extracted as the main topics of the publications and the online discussion of their audiences at Altmetric. Different measures are applied to determine the (dis)similarities between the topics put forward by the publication authors and those by the online audiences. Results show that overall there are substantial differences between the two sets of topics around Big Data scientific research. The main exception is Twitter, where high-frequency hashtags in tweets have a stronger concordance with the author keywords in publications. Among the online communities, Blogs and News show a strong similarity in the terms commonly used, while Policy documents and Wikipedia articles exhibit the strongest dissimilarity in considering and interpreting Big Data related research. Specifically, the audiences not only focus on more easy-to-understand academic topics related to social or general issues, but also extend them to a broader range of topics in their online discussions. This study lays the foundations for further investigations about the role of online audiences in the transformation of academic topics across altmetric sources, and the degree of concern and reception of scholarly contents by online communities. [ABSTRACT FROM AUTHOR]

The computer algebra system DERIVE had a very important impact in teaching mathematics with technology, mainly in the 1990's. The authors analyze the possible reasons for its success and impact and give personal conclusions based on the facts collected. More than 10 years after it was discontinued it is still used for teaching and several scientific papers (most devoted to educational issues) still refer to it. A summary of the history, journals and conferences together with a brief bibliographic analysis are included. [ABSTRACT FROM AUTHOR]

A Hypertension is the most crucial reasons for sudden death. As indicated by WHO (World Health Organization); in the modern world, 330 million individuals have hypertension. In 2025, it might be around 1.56 billion individuals living with high blood pressure. In this advanced world, cell phone and web becomes a typical spot to associate with the general population. Presently we can utilize it as wellbeing administration for general wellbeing monitoring. Blood pressure is a standout amongst the most widely recognized diseases. Once in a while pulse estimations are taken with the patients arm in the wrong position which can cause mistaken readings. Smart phones applications can tackle this issue. Cell phone applications that interface with individual sensors have demonstrated more successful for health-data group. Blood pressure is essential since hypertension is the higher danger of medical issue later on. At the point when pulse is high, it begins to harm the veins, heart, and kidney. It can prompt heart attack, stroke and other issue. It frequently has no notice signs or manifestations, and many people don't understand about it. We present an incorporated, compact gadget to give an advantageous answer for remote observing pulse at the fingertip and body temperature utilizing Ethernet innovation and generally online methods. Presently diseases related to heart are increasing. The majority of the occasions in these cases, patients may not understand their genuine conditions and even there are no specialists close by, particularly in village zones, however at this point, a large portion of the diseases are treatable whenever recognized in time. We have endeavored to make a framework which may give data about one's physical condition and help him/her to identify these dangerous however reparable illnesses. The framework gives data of heart rate while procured on the versatile side in realtime and transmits results to web. In this framework, the state of heart and body temperature can be observed from remote spots. In the long run, this gadget gives an ease, effectively open human wellbeing screen arrangement spanning the holes among patients and specialists. [ABSTRACT FROM AUTHOR]

User authentication such as password setting has become increasingly important for the secure management of the information stored in mobile devices. However, in the password authentication schemes used in mobile devices, enhancing security reduces their usability, and passwords become hard to memorize. In addition, enhancing their usability makes them vulnerable to shoulder-surfing or recording attacks involving stealing a glance at the authentication process through the system interface. In this paper, we propose a password authentication scheme that uses a virtual scroll wheel, called WheelLock, to ensure appropriate usability and prevent brute force, shoulder-surfing, and recording attacks. [ABSTRACT FROM AUTHOR]