Artículo
Permanent URI for this collectionhttps://hdl.handle.net/11285/345284
Artículo científico o editorial en una publicación periódica académica sujeto a revisión de pares. Cumple con los índices internacionales o bases de datos de amplia cobertura, como el listado del Current Contents, ISI WEB of Knowledge (http://isiknowledge.com/) e índice de revistas mexicanas de CONACYT (www.conacyt.mx/dac/revistas). Éstos indizan y resumen los artículos de revistas seleccionadas, en todas las áreas del saber.
Browse
Search Results
- From flexibility to adaptive learning: a pre-COVID-19 perspective on distance education in Latin America(Frontiers, 2024-03-13) Miralrio Pineda, Alan Joel; Muñoz Villota, Jessica Genith; Camacho Zuñiga, Claudia; https://ror.org/03ayjn504; https://ror.org/023m5rq87; Nganji, JuliusAt the time of this writing, emerging Generative Artificial Intelligence (GenAI) technologies, such as ChatGPT, Bard, and DALL-E, are shaping education. Despite their great potential for enhancing education, the discussion on the risks for the Society is an ongoing debate. Remote or distance education (DE) in developed countries has evolved in parallel to the permeation of Information and Communication Technologies (ICT). In Latin America (LATAM), a deep understanding of this interrelated evolution will encourage an efficient implementation of innovative policies, pedagogies, and technologies, including GenAI. This paper presents the historical development of DE in LATAM, drawing connections with milestones along the evolution of ICT in the region. This evolution is described across five generations: Correspondence, Audiovisual, ICTs-based, Web-based, and Interactive. Each generation offered incremental benefits to students, from flexibility and well-designed instructional materials to adaptive, interactive, and cost-effective education. This research encompassed a comprehensive search on Scopus, Web of Science, Google Scholar, ScienceDirect, Latindex, Dialnet, Redalyc, and SciELO with an historical approach. It yielded 97 peer-reviewed articles, books, and reports from recognized international organizations, published in Spanish or English and covering a period spanning from the end of the 19th century to the onset of COVID-19 lockdown. The analysis confirms the critical role of Higher Education Institutions (HEIs) in LATAM in supporting ICT integration, demonstrating a synergistic interplay with DE. Notwithstanding, the region’s social inequality and digital divide have delayed the full deployment of DE’s advantages, in comparison to USA and Europe. The paper exposes different scenarios and tech-educational requirements of DE, showcasing Mexico, Brazil, and Colombia, as well as other countries with smaller populations. Notably, by 2019, Tecnologico de Monterrey in Mexico, and Universidade de São Paulo and Universidade Federal da Paraíba in Brazil have pioneered the implementation of the Fifth Generation of DE in the region. The findings of this research highlight the value of DE as a cost-effective solution to traditional education, addressing social barriers and broadening educational access in LATAM, especially during emergencies. This research poses significant implications that can equip digital technology providers, HEIs, governments, and policymakers as they navigate the ongoing educational challenges.
- Room temperature synthesis, characterization and enhanced gas transport properties of novel poly(oxindolylidene arylene)s with dibenzothiophene, dibenzothiophene-S-oxide and dibenzothiophene-S,S-dioxide fragments in the main chain(Elsevier, 2024-02-27) Zolotukhin, Mikhail G.; Sulub-Sulub, Rita; Aguilar-Vega, Manuel; Cetina Mancilla, Enoc; Camacho Zuñiga, Claudia; González Díaz, Maria Ortencia; Cervantes T., Alondra; Ruiz Treviño, Francisco Alberto; Vivaldo Lima, Eduardo; Vera Graziano, Ricardo; https://ror.org/01tmp8f25; https://ror.org/03ayjn504Aromatic sulfur-containing polymers poly(arylene ether sulfone)s and poly(arylene sulfide sulfone)s are widely used in membrane-based gas- and liquid separations and purification technologies. In this work, we report a facile, robust, room temperature synthesis of a series of novel, solution processable aromatic polymers containing dibenzothiophene, dibenzothiophene-S-oxide, and dibenzothiophene-S,S-dioxide fragments in the main chain, alternating with bulky, torsion resistant oxindolylidene groups. The NMR studies of the polymers obtained revealed ladderized, rigid kink-structured backbones. This combination provides membranes with higher permeability and selectivity with gas pairs CO2/CH4, H2/CH4 and H2/N2, close to or even surpassing the 2008 Robeson’s trade-off line, that compare favorably with polysulfones and poly(ether sulfone)s reported in the literature that lie below the 1991 upper bond. Polymer P2-SO2 containing dibenzothiophene-S,S-dioxide fragments showed impressive CO2 and H2 permeabilities (243. 3 and 315.1 Barrer, respectively); on the other hand, P1-SO containing dibenzothiophene-S-oxide exhibited remarkable H2/CH4 and H2/N2 selectivity (127.26 and 99.34, respectively). This work offers a novel and facile route to fabricate various polysulfones and polysulfoxides with reversible-tunable gas separation properties inspired by the concept of rigid kink-structured backbones that shift their gas transport properties towards higher permeability and higher selectivity.