ABSTRACT
Teaching-learning processes have been affected by the changes that the introduction of information and communication technologies are making to the current global dynamics. This study examines the trends and evolution of the application of virtual tools in teaching-learning processes. Using a bibliometric analysis, 104 articles retrieved using a search equation defined under the PRISMA methodology were analysed. The results allowed the identification of the most influential contributions, authors, and journals, as well as the trends of research carried out in the field, identifying the authors García-Peñalvo, Sénchez-Prieto and Olmos-Migueléñez as the main references in terms of productivity and impact, as well as the journal Computers in Human Behaviour as the most important in academic impact;additionally, it is identified that COVID-19 and online education are among the main emerging concepts, and higher education and the TAM are among the most solid in the research field. Similarly, the research carried out can be classified into four categories based on their main topic: the acceptance of technology;the design of instruments;the design of platforms;and relevant content. Among the main conclusions, it is mentioned that these tools provide aspects of flexibility, coverage and accessibility at all educational levels.
ABSTRACT
Covid-19 testing is not accessible for millions during this pandemic despite our best efforts. Without greatly expanded testing of asymptomatic individuals, contact tracing and subsequent isolation of spreaders remains unobtainable as a means for control. In an effort to increase RT-PCR assay testing for the presence of the novel beta-coronavirus SARS-CoV-2 as well as improve sample collection safety, GenTegra LLC has introduced two products for saliva collection and viral RNA stabilization: GTR-STM (GenTegra Saliva Transport Medium) and GTR-STMdk (GenTegra Saliva Transport Medium Direct to PCR). Both products contain a proprietary formulation based on GenTegra's novel "Active Chemical ProtectionTM" (ACP) technology that gives non-dilutive, error-free saliva sample collection using RNA stabilization chemicals already dried in the collection tube. GTR-STM can be used for safer saliva-based sample collection at home (or at a test site). Following saliva collection, the sample-containing GTR-STM can be kept at ambient temperature during shipment to an authorized CLIA lab for analysis. SARS-CoV-2 viral RNA in GTR-STM is stable for over a month at ambient temperature, easily surviving the longest transit times from home to lab. GTR-STM enhances patient comfort, convenience, compliance and reduces infectious virus exposure to essential medical and lab professionals. Alternatively, the GTR-STMdk direct-into-PCR product can be used to improve lab throughput and reduce reagent costs for saliva sample collection and testing at any lab site with access to refrigeration. GTR-STMdk reduces lab process time by 25% and reagent costs by 30% compared to other approaches. Since GTR-STMdk retains SARS-CoV-2 viral RNA stability for three days at ambient temperature, it is optimized for lab test site rather than at home saliva collection. SARS-COV-2 viral RNA levels as low as 0.4 genome equivalents/uL are detected in saliva samples using GTR-STMdk. This increased sensitivity of SARS-CoV-2 detection can expand Covid-19 testing to include asymptomatic individuals using pooled saliva. The formal Limit of Detection (LoD) of SARS-CoV-2 in GTR-STM and GTR-STMdk in human saliva in individual and pooled samples will shortly be known.