Search

In this study, TiC particle-reinforced Cu-based composites were prepared by powder metallurgy and spark plasma sintering (SPS) techniques. The mechanical and electrical properties of TiC/Cu composites were analyzed in conjunction with micro-morphology. The results showed that: TiC was fully diffused in the Cu matrix at a sintering temperature of 900 °C. The micron-sized TiC particles were most uniformly distributed in the Cu matrix and had the best performance. At this time, the densification of 5 wt.% TiC/Cu composites reached 97.19%, and the conductivity, hardness, and compressive yield strength were 11.47 MS·m−1, 112.9 HV, and 162 MPa, respectively. The effect of TiC content on the overall properties of the composites was investigated at a sintering temperature of 900 °C. The TiC content of the composites was also found to have a significant influence on the overall properties of the composites. The best performance of the composites was obtained when the TiC mass fraction was 10%. The average values of density, hardness, yield strength and conductivity of the 10 wt.% TiC/Cu composites were 90.07%, 128.3 HV, 272 MPa and 9.98 MS·m−1, respectively. The yield strength was 272 MPa, and the compressive strain was 38.8%. With the increase in TiC content, although the yield strength increased, the brittleness increased due to more weak interfaces in the composites. [ABSTRACT FROM AUTHOR]

The grain refinement mechanism of Al–Ti–C grain refiners used in the casting procedure of aluminum has been studied by first‐principles calculation. Considering the controversy over Al3Ti, TiC, or Al3Ti–TiC as nucleation sites, the adsorption behavior of possible nucleation surfaces for Al atoms, including adsorption energies and adsorption sites, as well as the interfacial properties of Al/Al3Ti/TiC are calculated and compared. In the results, it is shown that the Al3Ti(112) surface has a stronger adsorption capacity for Al than TiC. By using the edge‐to‐edge matching crystallographic model and the calculation of the adsorption energy, it is found that the monolayer Al3Ti(112) can be stabilized on the TiC(100) surface, and the combination of TiC and monolayer Al3Ti can significantly improve the adsorption capacity of Al. Interfacial electronic structure analysis shows stronger chemical bonding between Al and Ti at the Al/Al3Ti/TiC interface compared to Al/Al3Ti, which explains that the monolayer Al3Ti covering the TiC surface has the strongest adsorption capacity for Al atoms. Therefore, it is speculated that TiC with a monolayer of Al3Ti covering the surface will serve as a potential nucleation site during grain refinement, which will provide a theoretical reference for future research work. [ABSTRACT FROM AUTHOR]

The present study was a meta-analysis compiling research on digital citizenship conducted in Mexico in 2011 - 2023. It was guided by the objective of arguing, analyzing and categorizing the lines of knowledge generation and application (LGAC) related to digital citizenship in Mexico. The methodology applied was meta-analysis where 88 research studies were documented: 47 papers, 33 journal articles and 8 theses. The studies found support the existence of six LGAC in Mexico. It was concluded that the studies are related to understanding the way in which society appropriates digital technologies, interactions through social networks and the manifestations of digital identity. Another point to highlight is that the study of digital citizenship has been used to analyze the acquisition of digital skills and attitudes, social issues addressed by digitalization, the roles played by educational actors in the virtual environment and the promotion of multiculturalism. The studies found provide relevance to the LGAC, and allow concluding that digital citizenship is a topic present in research on educational technology in Mexico. [ABSTRACT FROM AUTHOR]

ICT is more than just an information medium since they can help promote significant changes in teaching. Taking advantage of the mandatory use of these tools in the COVID pandemic, we have analyzed the activities carried out by teachers of STEM subjects (Mathematics, Science and Technology) in secondary education, through two studies. Both studies were aimed at studying whether the objectives and expected results of the activities were more constructive and focused on the teachers or, on the contrary, they were more reproductive and focused on the teacher or the content. The first study was carried out by designing and administering a Likert questionnaire on the frequency of different types of tasks. An analysis of variance was applied to these data. The second study analyzed an activity selected by the teachers themselves using a category system (SATA). The results show a predominance of reproductive activities, managed by the teacher and a use of ICT as support. [ABSTRACT FROM AUTHOR]

The rapid advancement of technology and the growing demand for ICT skills have necessitated innovative educational approaches to improve student achievement. Traditional classroom-based teaching often struggles to keep pace with the dynamic and evolving nature of ICT education. The variability in student learning styles and the increasing requirement for digital skills necessitate a flexible and scalable educational model. This study focuses on developing an effective online learning model tailored to enhance student performance in the field of Design of Information and Communication Technology (ICT). The study employed a mixed-methods approach, combining quantitative and qualitative data. Participants included undergraduate students enrolled in an ICT Design course. They were given access to an online learning platform offering interactive video lectures, multimedia resources, assessments, and collaborative projects. Data collection included pre- and post-tests to measure academic performance, surveys to gauge student satisfaction, and focus group discussions to gather qualitative insights into their learning experience. The findings indicated a significant improvement in student achievement, with post-test scores consistently higher than pre-test scores across all participants. The model's flexibility allowed students to learn at their own pace, leading to a deeper understanding of key concepts. Interactive resources and collaborative projects enhanced engagement and fostered critical thinking. Moreover, the majority of students expressed high satisfaction with the online learning experience, citing the variety of resources, self-paced learning opportunities, and collaborative forums as significant contributors. [ABSTRACT FROM AUTHOR]

The present study investigates the effect of adding waste glass powder (WGP) along with titanium carbide (TiC) as reinforcement on the microstructure, wettability, mechanical, and tribological behavior of AZ91D magnesium-based alloy. The addition of 3 wt.% WGP and 6 wt.% TiC resulted in a refined microstructure, with the formation of good interfacial bond and a decrease in the porosity of the alloy. The wettability of the alloy was improved with the addition of reinforcements. The mechanical properties of the modified AZ91D alloy were enhanced significantly, with an increase in the hardness (51.66% improvement), fatigue strength (59.19% improvement) and ultimate tensile strength (11.9% improvement). The wear resistance of the alloy was observed to increase with the addition of WGP and TiC, owing to the formation of a protective layer on the surface of the alloy. The results suggest that the addition of WGP and TiC can improve the overall properties of AZ91D magnesium-based alloys, making them suitable for various industrial applications. Wear results showed that the resistance against wear rate of the developed composite significantly improved after the addition of the mixture of 3% Waste glass powder + 6% TiC. [ABSTRACT FROM AUTHOR]

The primary objective of this research study is to assess the impact of technological tools on Chilean companies sales. The most recent data are obtained from the published survey "Acceso y Uso de Tecnología de Información y Comunicación en Empresas." The variables that affect company sales are determined through a descriptive analysis and a linear regression model. The results show that increases in the variables of ICT (Information and Communication Technology) specialists, ERP (Enterprise Resource Planning) software, social networks, broadband, websites, electronic devices, and Big Data generate higher sales for Chilean companies. ERP software and ICT have highest coefficient levels in the regression model. In conclusion, it is recommended that companies opt for the use of digital tools, specifically on ERP systems and in the hiring of specialized ICT personnel. [ABSTRACT FROM AUTHOR]

Copyright of Revista Complutense de Educación is the property of Universidad Complutense de Madrid and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Complutense de Educación is the property of Universidad Complutense de Madrid and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A TiC coating was rapidly formed on the surface of diamond particles by thermal explosion reaction using Ti/Carbon black/PTFE/Diamond powders as raw material. XRD and SEM were used to analyze and observe the phase composition and microstructure of the coating. Results show that the phase composition of bonders was TiC, Ti, and TiF3 after thermal explosion reaction. The diamond surface obtained after the reaction can achieve good coating. Changing the diamond content in the raw material can regulate the phase composition of the coating. The coating on the diamond surface was mainly composed of TiC. When the diamond content in the raw materials was 20–40%, the coating was composed of TiC and TiF3. When the diamond content in the raw material was 60–80%, the coating was composed of TiC and Ti. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Comparative & International Higher Education is the property of Comparative & International Education Society Higher Education SIG and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mendive - Revista de Educacion is the property of Universidad de Pinar del Rio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Brazilian Journal of Education, Technology & Society (BRAJETS) / Cadernos de Educação Tecnologia e Sociedade (CETS) is the property of Brazilian Journal of Education, Technology & Society - BRAJETS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To elucidate the grain refinement mechanism of a titanium alloy (Ti-6Al-4V) with titanium carbide (TiC) heterogeneous nucleation site particles, the space mission Hetero-3D is being carried out in the electrostatic levitation furnace in the International Space Station (ISS-ELF). In this study, as preliminary ground experiments for Hetero-3D, samples of Ti-6Al-4V with TiC were melted and solidified in a ground-based electrostatic levitation (ESL) furnace to establish the heating conditions for the prior-β grain refinement. The number of prior-β grains can be counted on the reconstructed prior-β grain maps in the cross sections of the samples using orientation imaging microscopy software. As a result, the effect of the prior-β grain refinement due to TiC can be confirmed through the degree of undercooling, ∆T, of less than 50 K. TiC particles act effectively with respect to the grain refinement of the sample with 5 mass% TiC in the ESL experiments under the following two heating conditions: (1) the maximum temperature, Tmax, is lower than 2050 K, and (2) the integral value of heating, I (T, t), calculated based on the square of temperature, T, and melting time, t, is smaller than 1.5 × 108 K²∙s. Furthermore, voids are generated on prior-β grain boundaries near the center of the refined sample due to shrinkage during solidification. [ABSTRACT FROM AUTHOR]

Modifying the microstructure of the IN738 superalloy increases the working efficiency of gas turbine blades. In this study, the microstructure of IN738 superalloy processed by selective laser melting was improved by applying a magnetic field and adding TiC nanoparticles. The results show that the application of a magnetic field by crushing the solidifying grains and the addition of TiC by creating places for the heterogeneous nucleation of the melt causes a remarkable expansion of the equiaxed grains. However, the simultaneous application of a magnetic field and TiC nanoparticles significantly reduces the grain size, grain aspect, and, consequently, the crack density and porosity. Also, the results showed that with the reduction of grain ratio, high-angle grain boundary and grain boundary length density increase dramatically, which results in a decrease in the concentration of elements and phases sensitive to cracking in grain boundaries. The increase in the volume fraction and the reduction in the γ' size were other effects of adding TiC and the external field, which significantly improved the creep and wear behavior. So, with the expansion of the equiaxed region, the hardness increased, and the wear resistance increased through the delay in the transition from the elastic area to the plastic area during the wear test. [ABSTRACT FROM AUTHOR]

Copyright of Brazilian Business Law Journal / Administração de Empresas em Revista is the property of Administracao de Empresas em Revista and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

• A patient-centered approach was implemented to define comprehensive behavioral intervention for tics (CBIT) research priorities. • Priorities related to treatment access and improving broad functional outcomes. • Our approach efficiently identified actionable priorities for CBIT research. To establish a patient-centered agenda for research that will lead to effective, widespread availability, adoption, and utilization of evidence-based behavioral treatment of Tourette syndrome and other tic disorders (TDs), we planned and executed a multistage, collaborative "Treating Tourette Together" research planning project with researchers, clinicians, patients, families, and other interested parties. Priorities for future behavioral treatment research were solicited from these parties via anonymous community surveys, a 2-day research planning summit with 46 individuals representing key stakeholder groups, and community response to summit reports. Four high-priority research domains were identified: (a) expanding treatment access, (b) improving treatment outcomes, (c) optimizing treatment within a broader care model, and (d) evaluating outcomes beyond tic severity. Community-engaged participatory research models can efficiently delineate clear and actionable priorities for clinical research. This approach holds promise for improving the impact of clinical research in TDs and other neuropsychiatric disorders. [ABSTRACT FROM AUTHOR]

316L stainless steel is widely used in various industrial fields, but its strength is relatively low. The improvement of its strength has become a research hotspot. In this study, nano titanium carbide (TiC) particles are ball milled with 316L with the addition of 2 wt% and 4 wt%. The composite powder was then used for the fabrication of samples by laser powder bed fusion. The results show that the TiC is uniformly distributed in the microstructure. With the addition of TiC, the average size of the grains is significantly reduced. The strength, hardness, and wear resistance of TiC/316L samples have been greatly improved. The tensile strength of formed 2 wt% TiC/316L is 948 MPa, together with a extension rate of 36.0%, which has been increased by 42.6% and 79.7%, respectively. This study provides an effective way to improve the strength at room temperature and the high temperature of 316L built by laser powder bed fusion. [ABSTRACT FROM AUTHOR]

The purpose of this research was to realize a metric study of the scientific production generated between1992-2022, about one of the topics that has acquired greater importance in the educational field, due to the pandemic by COVID-19: the teacher technostress. For that reason, 139 scientific documents indexed in the Web of Science database were examined. The content was analyzed with Excel spreadsheet and with the VOSviewer program. To guarantee the quality of the methodological procedure, the PRISMA protocol was used. First, a bibliometric analysis of the extracted publications was conducted, taking as a reference several indicators of production and dispersion. Secondly, a network analysis was performed, to try to understand the collaboration structure between countries and the conceptual structure of the topic under study. The results highlight that the existing scientific information on technostress in teachers is scarce, that it is widely dispersed by research areas and that there are no major producers on the subject. Likewise, COVID-19 has been a determining turning point that has generated the highest percentage of scientific production recorded to date, which is contributing to give greater visibility to technostress, not only as a psychosocial occupational risk but also to the teaching profession as one of the most vulnerable work collectives in an online environment. [ABSTRACT FROM AUTHOR]

Students commonly have difficulty with mathematics and mathematical problem solving. Therefore, it is necessary to design and implement interventions aimed at improving these essential components of learning. In this research, a didactic strategy supported by Information and Communications Technologies (ICT) is proposed for teaching mathematics, in the fourth year of Basic General Education (EGB), elementary sublevel, of the Educational Unit (UE) La Salle, in Ecuador. The preliminary data collection tools were questionnaires and interviews. The analysis technique used to analyze the quantitative data was quantitative descriptive. The participants were 50 students (6 to 8 years old), who were divided into two groups (experimental and control). Based on the statistical analysis, it was identified that the use of ICT has a positive impact on the academic performance of students and it was found that ICT is more convincing, effective and valuable in teaching mathematics compared to conventional teaching techniques teaching. It is recommended that digital educational resources be used in the teaching of mathematics to improve the academic performance of elementary school students. The proposed strategy was validated by expert criteria, as Very valuable, so this strategy can be classified as an effective didactic guide for teaching mathematics based on Information and Communications Technologies in fourth-year students of EGB elementary sublevel of the EU La Salle. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Derecho de la Seguridad Social, Laborum is the property of Ediciones Laborum S.L. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The knowledge of Young's modulus is important for a quantitative assessment of strengthening contributions in CoRe alloys, such as strengthening by carbides. In this work, the temperature-dependent Young's modulus of monocarbide-strengthened CoRe-based alloys is measured using the vibrating reed technique. In this method, a reed-shaped sample is excited electrostatically, and the eigenfrequencies are determined. Using these frequencies, Young's modulus can be derived analytically or, more reliably, assisted by finite element simulations. The resulting values for Young's modulus are compared to theoretical estimations, and the influence of titanium- and tantalum-carbides on Young's modulus is evaluated. It was found that low amounts of carbides increase Young's modulus significantly. Analytical estimations are in good agreement with experimental results of TaC-containing alloys, whereas estimations for TiC-containing alloys are inaccurate. [ABSTRACT FROM AUTHOR]

In this work, the TiC-reinforced CoNi alloy coatings were prepared by the plasma spraying method. Their microstructure, high-temperature oxidation, and thermal shock resistance at 900 °C were studied. The results showed that the CoNi alloy coating exhibited a single phase (c-Co-Ni-Cr-Mo). After adding Ti-graphite mixed powders, the sprayed coating exhibited TiC and TiO2 phases, besides the c-Co-Ni-Cr-Mo matrix phase. For CoNi alloy coating, the main oxidation products were Cr2O3 and CoCr2O4 (NiCr2O4). For TiC-CoNi alloy coating, the main oxidation products were the TiO2 phase, coupled with Cr2O3 and CoCr2O4 (NiCr2O4) phases. The content of oxides increased with the oxidation time. The oxidation weight gain of the TiC-CoNi composite coating was slightly higher than that of the CoNi alloy coating. The formation of TiC could improve the thermal shock resistance of the CoNi alloy coating. [ABSTRACT FROM AUTHOR]

Durante la crisis sanitaria COVID 2019, la búsqueda de estrategias para la continuidad formativa ha sido esencial en los procesos de formación inicial docente (FID), donde la integración del estudiantado en práctica profesional en las lógicas de colaboración de los establecimientos educativos ha sido un desafío. El presente estudio describe el trabajo colaborativo que se desarrolla en la pandemia entre el profesorado del sistema escolar y estudiantes en práctica profesional de una Facultad de Educación de la Región de la Araucanía, en Chile. Se utilizó un método mixto de investigación, a través de la estrategia de combinación metodológica cualitativa-cuantitativa. En el proceso de recogida de información se aplicaron 11 entrevistas semiestructuradas y se analizó un cuestionario de creencias aplicado a 388 estudiantes en práctica profesional. Los resultados revelan una categoría central vinculada a cinco códigos asociados al asesoramiento en el uso de TIC, la co- enseñanza, el trabajo colaborativo, la comunicación y apoyo y las competencias interpersonales. Se concluye que en el desarrollo de un trabajo colaborativo efectivo en el contexto de crisis sanitaria COVID-19 ha sido clave las habilidades interpersonales, la comunicación y el dominio de Tecnologías de la Información y la Comunicación (TIC) facilitó la integración de estudiantes en práctica al trabajo colaborativo de sus establecimientos educativos. Futuras investigaciones deberán profundizar en el estudio de este fenómeno en otros contextos y su impacto en la presencialidad.

Las elevadas cifras de deserción estudiantil y bajos rendimientos educativos que fueron propiciados por la pandemia del COVID-19 presentaron el desafío urgente de mejorar el nivel educativo, un reto que involucra a todos los participantes del proceso de enseñanza-aprendizaje. En este contexto, y teniendo en cuenta el rápido avance de las Tecnologías de la Información y Comunicación (TIC), diversos expertos en pedagogía sostienen que las TIC pueden contribuir a establecer un ambiente de aprendizaje didáctico y efectivo. Sin embargo, en Bolivia no existen registros sobre la implementación y el impacto de las TIC. Por tal motivo, este estudio tuvo como objetivo identificar el panorama del uso y el impacto de las TIC en una disciplina teórico-práctica como Microbiología, mediante un análisis exploratorio, cuantitativo, descriptivo y transversal de las percepciones recogidas a través de un instrumento proporcionado al estudiantado. La muestra fue conformada por 43 estudiantes de la Carrera de Bioquímica y Farmacia de la Universidad del Valle – Sede La Paz quienes cursaron la disciplina de Microbiología durante el segundo semestre del año 2022 y que aceptaron participar en el estudio firmando un consentimiento informado. Esta muestra fue seleccionada por conveniencia de manera no probabilística. Del análisis porcentual de las declaraciones del estudiantado, se pudo identificar que cerca del 75 % del estudiantado está familiarizado con la expresión TIC. Además, el 81,40 % del alumnado afirmó que el uso de TIC en las actividades académicas mejoró su rendimiento académico. Asimismo, el estudiantado refirió que en el 46,6% de los casos el plantel docente implemento las TIC. Por otro lado, el estudiantado evidencia que existe una selección adecuada de TIC en el 53,45% de los casos. Estos hallazgos confirman el impacto positivo que trae el uso de TIC en los entornos educativos. Asimismo, se sugiere realizar estudios similares para evaluar la eficacia de las diferentes herramientas tecnológicas en los procesos de enseñanza-aprendizaje actuales, con el fin de sugerir adecuaciones a las metodologías educativas y mejorar la formación integral de los futuros profesionales.

En el marco de la pandemia que obligó a impartir las clases en línea, se analizan dos variables: la formación para el empleo y la ciudadanía; y los efectos del uso de las Tecnologías de la Información y la Comunicación (TIC) en la autonomía del docente y la eficacia de su enseñanza. En el artículo se reflexiona en cómo conciliar formar para el trabajo y la ciudadanía en un mundo en que desaparecen empleos debido a la automatización de la manufactura. Respecto a la utilización del magisterio de software educativo, se recapacita en evitar que los algoritmos y programas de cómputo no sustituyan a los contenidos y la didáctica, ni caiga en el determinismo tecnológico como panacea para mejorar su enseñanza. La propuesta del texto se enfoca en promover la formación ciudadana y reflexionar sobre el uso del magisterio de las TIC como un medio y no un fin en sí mismas. En cuanto al método de análisis se basó en la etnografía, porque quien investiga es parte del estudio y registra los datos desde la observación participante en la cotidianidad escolar. Además, realiza un registro detallado de los acontecimientos observados en un diario de campo.

Dado el entramado complejo de factores que influyen en la vida contemporánea de los jóvenes, consideramos esencial explorar el ámbito de las Tecnologías de la Información y la Comunicación (TIC) y su impacto en los estudiantes de la Educación Secundaria Obligatoria (ESO). La tecnología se ha integrado de manera contundente y significativa en el entretenimiento y el día a día de los adolescentes, destacando la necesidad de examinar y comprender cómo las TIC afectan sus vidas y cómo las manejan. Según Del Barrio (2017), los adolescentes ya no conciben sus vidas sociales o su tiempo de ocio sin una inmersión total en estas tecnologías. Sus modos de vida, predominantemente digitales, son extremadamente atractivos para ellos y a veces pueden resultar adictivos. Por lo tanto, nos propusimos como objetivos de este artículo identificar los patrones de uso de Internet y redes sociales por parte de los estudiantes de la ESO, evaluando cómo estos patrones han cambiado en un período de solo cuatro o cinco años y el efecto que estas tecnologías tienen en sus vidas. En cuanto a la metodología, hemos llevado a cabo una revisión bibliográfica centrada en los estudios de Andrade, B., Guadix, I., Rial, A., & Suárez, F. (2021) en su informe para UNICEF, y de Del Barrio (2017) en la Comunidad Autónoma de Cantabria. Además, hemos considerado ciertos indicadores del informe reciente de la OCDE (2024), titulado “Estudiantes, dispositivos digitales y éxito”, basado en los datos de PISA 2022. Este enfoque nos ha permitido generar una serie de reflexiones propias sobre los cambios observados en el intervalo entre estos estudios.

Actualmente, las Tecnologías de la Información y la Comunicación (TIC) se encuentran en el centro de la vida social de las nuevas generaciones, por lo que el desarrollo de la competencia digital (CD) se ha convertido en uno de los objetivos primordiales en la educación actual. Asimismo, en el ámbito de las redes sociales destaca la plataforma YouTube por su formato audiovisual y por su frecuencia de uso por parte de los jóvenes. Por tanto, el propósito del presente trabajo es mostrar las posibilidades educativas que ofrece YouTube, tanto para el desarrollo de la competencia digital como para el pensamiento crítico y la creatividad. Para ello, se ha elaborado una propuesta basada en una doble aproximación a las capacidades de los estudiantes: por un lado, como receptores, y, por otro, como productores y emisores de contenido.

El uso de las Tecnologías de la Información y las Comunicaciones ha tenido un impacto significativo en todas las áreas del conocimiento, de manera particular en los procesos sustantivos de la educación superior en las carreras tecnológicas de la salud. Es propósito de los autores informar sobre el uso de las Tecnologías de la Información y las Comunicaciones para la divulgación de actividades docentes, extensionistas e investigativas de la cátedra Integración de las Ciencias y la Educación Superior por un Desarrollo Sostenible. Se destaca la vinculación de dos proyectos de investigación científica con un fin único: la promoción de actividades educativas con herramientas digitales.

La desmotivación en el ámbito universitario puede ser la causa del abandono de los estudios. La motivación hacia los estudios en enseñanzas superiores puede fomentarse a través de metodologías activas en las que el alumnado pasa a ser el protagonista del proceso de enseñanza-aprendizaje. Una metodología motivadora y basada en las TIC es la gamificación. En este trabajo se explica el diseño de gamificación para la impartición de la asignatura de TIC aplicadas a la educación en el grado de pedagogía. Se indican los elementos de gamificación utilizados, la narrativa presentada y la estructura de las sesiones gamificadas. Los resultados obtenidos a nivel de satisfacción y mejora de la impartición de las clases fueron positivos, así como los resultados académicos obtenidos por los estudiantes participantes.

A raíz de la pandemia por COVID-19, se ha incrementado el número de docentes que apuestan por nuevos métodos de enseñanza, como la integración de los juegos serios en el aula. Este ensayo explora el proceso de creación de una Aventura Gráfica a través de la plataforma Genially. Se examina cada etapa del desarrollo: desde la elaboración de la historia, el desarrollo de desafíos que promueven el pensamiento crítico, hasta el diseño audiovisual que enriquece la experiencia de aprendizaje. Además, se describe la matriz que constituye el esqueleto del juego, destacando la importancia de una jugabilidad y una estética visualmente atractiva.

A medida que la tecnología redefine la educación a través de las Tecnologías de la Información y Comunicación (TIC), el aumento en el uso de pantallas digitales genera inquietudes sobre sus posibles efectos sobre la salud visual. Al analizar la evidencia científica, este trabajo desmonta mitos y aclara conceptos erróneos. No se trata del objeto observado en sí, sino factores conductuales como la distancia, la iluminación y las pausas, además del tiempo al aire libre, los responsables de los problemas visuales. Las pantallas como herramientas educativas no presentan mayores riesgos que los materiales impresos cuando se usan adecuadamente. En este panorama tecnológico en constante evolución, es crucial fomentar la alfabetización digital y el uso equilibrado de las TIC, empoderando a estudiantes y educadores para aprovechar al máximo los beneficios que estas herramientas modernas pueden ofrecer.

El presente artículo aborda la educación actual haciendo uso de las Tecnologías de Información y Comunicación por parte de los docentes de educación secundaria, que después de haber utilizado en su mayoría las herramientas tecnológicas durante el tiempo de confinamiento provocado por COVID-19; hoy en día se ha regresado a la educación tradicional donde ya no se utiliza estos recursos digitales debido a muchos factores como la falta de conectividad en las instituciones educativas de las zonas rurales y la falta de capacitaciones acerca de las TIC. La investigación tiene como objetivo identificar el uso de las TIC en docentes del nivel secundario en el proceso de enseñanza-aprendizaje; se utilizó el método fenomenológico hermenéutico correspondiente al paradigma cualitativo. La muestra que representó al estudio fue focalizada e intencionada y estuvo conformada por 6 docentes de educación secundaria, a quienes se les entrevistó en base a una guía de preguntas. Según las respuestas obtenidas de los y las entrevistadas se llegó a la conclusión de que los docentes poseen un nivel de conocimiento básico acerca de las TIC siendo la herramienta digital WhatsApp el más utilizado y la falta de conectividad de señal de internet el factor limitante más importante.

In this study, selective laser melting (SLM) technology was utilized to fabricate Ti6Al4V and TiC/Ti6Al4V composites. We then investigated the effect of the solution heat treatment temperature and aging time on the microstructural and mechanical properties of both the Ti6Al4V alloy and the TiC/Ti6Al4V composites. The findings showed that with an increase in the solution heat treatment temperature, the acicular martensite in the matrix of the Ti6Al4V alloy and the composites progressively transitioned into the plate-bar α phase. Concurrently, there was a distinct irregularity in the morphology of the β columnar grain boundaries, accompanied by an evenly enhanced and distributed β phase. With respect to hardness, the microhardness of Ti6Al4V initially displayed a slight drop with an increase in the solution temperature, followed by a significant increase, reaching a peak of 430 HV. In contrast, the composite materials exhibited an initial minor increase in microhardness followed by a substantial surge, with a maximum value of 607 HV. Post the aging treatment, the microhardness of the composite samples was observed to decrease from 463.2 HV to 362.7 HV. The aging time had a notable influence on the α + β structure, where the size of the martensitic α phase was constrained by the size of the β phase. This study revealed that an extension in the aging time resulted in an increased size of the strengthening phase, subsequently leading to a substantial reduction in the composite’s microhardness. This underscored the pivotal role of aging time in defining the mechanical properties of the composites.

INTRODUCTION: Although Staphylococcus aureus is the leading cause of biofilm-related infections, the lipidomic distributions within these biofilms is poorly understood. Here, lipidomic mapping of S. aureus biofilm cross-sections was performed to investigate heterogeneity between horizontal biofilm layers. METHODS: S. aureus biofilms were grown statically, embedded in a mixture of carboxymethylcellulose/gelatin, and prepared for downstream matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI IMS). Trapped ion mobility spectrometry (TIMS) was also applied prior to mass analysis. RESULTS: Implementation of TIMS led to a ∼ threefold increase in the number of lipid species detected. Washing biofilm samples with ammonium formate (150 mM) increased signal intensity for some bacterial lipids by as much as tenfold, with minimal disruption of the biofilm structure. MALDI TIMS IMS revealed that most lipids localize primarily to a single biofilm layer, and species from the same lipid class such as cardiolipins CL(57:0) - CL(66:0) display starkly different localizations, exhibiting between 1.5 and 6.3-fold intensity differences between layers (n = 3, p

Existe una relación directamente proporcional entre la educación y los avances tecnológicos, es decir conforme la tecnología evoluciona, así mismo la educación debería ir a la vanguardia de estos avances tecnológicos, incorporándolos en sus procesos de formación académica. En este artículo se presentan los resultados de la investigación realizada en el Centro Tutorial de San Juan Nepomuceno de la Universidad de Cartagena (Cartagena-Colombia); cuyo objetivo fue determinar la percepción de los estudiantes sobre la influencia de las Tecnologías de la Información y Comunicación (TIC) en su formación académica, partiendo de las herramientas tecnológicas puestas a su disposición por parte de la institución objeto de estudio. La metodología fue de tipo descriptiva, se realizó una revisión bibliográfica sobre las TIC en la educación, posteriormente se elaboraron, evaluaron y aplicaron los instrumentos utilizados para la recolección de la información. A partir de los resultados obtenidos, se concluye que la percepción que tienen los estudiantes sobre la influencia de las TIC en su formación académica es altamente significativa, además consideran que la institución en cuestión debe mejorar su infraestructura tecnológica.CLASIFICACIÓN JEL123, O32, O33, M15, Q55, 123

En la sociedad del conocimiento, los entornos digitales se han vuelto parte integral de la vida diaria de los estudiantes. Por lo tanto, es crucial utilizar la web 2.0 en el proceso de enseñanza-aprendizaje. En esta experiencia educativa, se exploró la integración de recursos digitales en la web social, como parte del aprendizaje de un tema académico específico en el aula. Los responsables de diseñar, producir y publicar estos recursos fueron estudiantes de Bioquímica y Farmacia en su cuarto semestre en una universidad ecuatoriana. Como resultado de este proyecto se generaron nueve recursos digitales, siendo los relacionados con las redes sociales los más destacados. Además, se obtuvieron valoraciones positivas y altas por parte de los estudiantes, lo que indica su disposición para abordar la integración de recursos digitales en la web social. Estos hallazgos proporcionan pautas prácticas y consideraciones relevantes para mejorar la educación mediante el uso de la web social, beneficiando así el proceso de aprendizaje de los estudiantes universitarios.

En el presente estudio se propone Google WorkSpace como herramienta para gestionar el aprendizaje. El objetivo fue determinar como Google WorkSpace y el uso de las TIC fortalecen la gestión del aprendizaje en estudiantes del 5to de Secundaria Comunitaria Productiva de la Unidad Educativa Santiago Tocoroni, Distrito Coripata del 2023. El desarrollo metodológico se basa en el paradigma positivista, el enfoque es cuantitativo y el nivel es exploratorio con un diseño no experimental. Los datos se recolectaron a través de un test de observación, un post test y una encuesta. En los resultados se evidencia que 92% de los estudiantes no tienen conocimiento sobre el Workspace, de igual forma 92% de los maestros tampoco tienen conocimiento sobre el uso de plataformas virtuales por lo cual, por lo cual se concluye que hay una carencia de conocimiento sobre la plataforma y manejo de las TIC. Aunque el proceso de investigación no se ha culminado, se puede decir por los resultados del post test, que el uso de espacios virtuales para la educación tiene un impacto positivo en el aprendizaje.

Las herramientas TIC han incrementado su uso en las entidades educativas como estrategia pedagógica para mejorar el proceso de enseñanza aprendizaje en las distintas áreas académicas de una manera interactiva y motivadora, lo que plantea el desafío de la inserción de dichas herramientas en aula. Este estudio consistió en realizar un diagnóstico de la efectividad del uso de la herramienta Math Cilenia de las operaciones básicas en el nivel de básica elemental de la Unidad Educativa Fiscal Las Mercedes de 24 de Mayo-Manabí. El enfoque investigación-acción guio este estudio, combinando el análisis de información cualitativa y cuantitativa para el procesamiento de resultados, las actividades cumplidas fueron: i) Diagnóstico del problema; ii) Plan de acción de la solución; iii) Implementación en aula; y iv) Evaluación de resultados. Los resultados evidenciaron mejora en los procesos de aprendizaje de las operaciones básicas, confrontado con el método tradicional. Se concluye que el uso de herramienta TIC mejoran la motivación y la capacidad de aprendizaje de los estudiantes, futuras investigaciones llevan a ejecutar un nuevo ciclo de aprendizaje del plan de acción con nuevas operaciones básicas usando Math Cilenia.

To improve the corrosion resistance of proton exchange membrane fuel cell (PEMFC) bipolar plates，TiC coatings were prepared by atmospheric plasma spraying (APS).The morphology and structure of the coatings were characterized by scanning electron microscopy (SEM)and X-ray diffractometer (XRD).The corrosion resistance of TiC coatings prepared at three different currents in the PEMFC environment was studied by potentiodynamic polarization，potentiostatic polarization and electrochemical impedance spectroscopy (EIS).Results showed that the corrosion current density of the TiC coating was one order of magnitude lower than that of the stainless steel substrate，indicating that the coating could effectively improve the corrosion resistance of 316L stainless steel.With the increase of spraying current，the coating at 500 A was shown to have the best corrosion resistance and conductivity.This was mainly due to the increase in current，which fully melted the particles，increased the density of the coating，and reduced defects such as pores.

Los Destinos Turísticos Inteligentes (DTI) surgen como una opción de gestión para mejorar la calidad y competitividad de los destinos turísticos tradicionales, se apoyan de modelos conceptuales que representan elementos y relaciones que conforman la estructura del sistema turístico. En ese sentido, las tecnologías de la información y comunicación (TIC) han ganado importancia en dichos modelos. El objetivo de esta investigación fue determinar la participación de las TIC en los ejes estratégicos que componen los modelos conceptuales DTI. Es un estudio metodológico cualitativo con una revisión exhaustiva de la literatura sobre modelos DTI, posteriormente se realizó un análisis cuantitativo de los modelos seleccionados, considerando como categorías de análisis los ejes estratégicos y los indicadores que estuvieran relacionados con las TIC. Se analizó la estructura de cuatro modelos: Invat.tur, Competitivo, Sistémico y Sinérgico. Dichos modelos tienen de cuatro a ocho ejes estratégicos que incluyen entre 28 y 68 indicadores asociados con las TIC. Entre los principales resultados se destaca que en el modelo Invat.tur el 60% de los indicadores están relacionados con las TIC; en el modelo Competitivo, el 33%; en el modelo Sistémico, el 76%; y en el modelo Sinérgico, el 32%. La importancia del uso de las TIC en los modelos DTI depende de la participación que se les asigne en cada uno. Finalmente, los destinos turísticos deben continuar implementando estrategias que incluyan cada vez más a las TIC en su gestión turística para mantenerse innovadores y competitivos.

Numerous studies have investigated the advantages of using composite laminates made of both metals and fibers, which include being able to sustain heavier loads, having better resistance to impacts, and being more durable, while also being lightweight. In this particular study, we utilized the hand lay-up method to create composite laminates consisting of three layers of aluminum alloy and 60 layers of fiber. We tested three different types of aluminum alloy (Al-2024, Al-5052, and Al-7075) and two types of fiber (kevlar and carbon), which were divided into three categories: kevlar fibers, TiC nanoparticle-impregnated kevlar fibers and carbon fibers. We then combined each type of fiber with each type of aluminum alloy to make nine distinct composite laminates. To determine the mechanical properties of the laminates, we used a rule-of-mixture formula. Our research revealed that kevlar fibers had a more significant impact on increasing the yield strength and ultimate tensile strength of the composite laminates than carbon fibers. However, carbon fibers have a greater effect on the modulus of elasticity of the composite. Among all types of aluminum, Al-2024 provides the highest mechanical properties for composite laminates. However, impregnating kevlar fibers with TiC nanoparticles did not enhance the anti-ballistic performance of composite laminates. Consequently, composite laminate that consists of Al-2024 and carbon fibers exhibits the best mechanical properties and anti-ballistic performance, making them the ideal choice for anti-ballistic applications.

In the present investigation, an attempt was made to evaluate the dissolution behavior of Ti in molten KCl-LiCl. The X-ray diffraction (XRD) pattern of heated Ti plate at 800 oC for 4 h without carbon black in molten salt revealed that TiCl3 formation was feasible. For more assurance, Ti plate was heated at 950 oC for 4 h in the presence of carbon black to identify synthesized TiC. Transmission electron microscope (TEM) and scanning electron microscope (SEM) images from precursors and the final product showed that nano-crystalline TiC formation from coarse Ti particles was almost impossible without Ti dissolution. Thermodynamics calculations using Factsage software proved that it was possible to form various TiClx compounds. The TiC formation mechanism can be discussed in two possible ways: a reaction between Ti ion and carbon black for synthesizing TiC (direct) and a reaction between TiCl4 and carbon black led to indirect TiC synthesis. Elemental mapping using energy dispersive X-ray spectroscope (EDS) indicated that up to 815 oC, chlorine existed in the map.

Este artículo de investigación cualitativa surge debido a la realidad de los estudiantes de primer ingreso de la carrera del Bachillerato en la Enseñanza del Inglés, en la Universidad Nacional, Campus Coto de la Región Brunca durante el 2021 en presencialidad remota, con respecto a la accesibilidad, nivel de conocimiento, e importancia que tuvieron las herramientas de la tecnología de la Información y la Comunicación (TIC) y las herramientas de la Tecnología de Aprendizaje y Conocimiento (TAC). Se evidencia que, el acceso a las TIC y TAC se vio limitado debido a distintos factores presentes en zonas rurales, por lo que es necesario trabajar en el acceso de estas herramientas en la Región Brunca. También, se evidencia la poca competencia en cuanto al uso de las TIC y TAC debido a que los estudiantes no contaban con el nivel de conocimiento adecuado al principio del curso lectivo. Sin embargo, estas herramientas fueron importantes en el proceso de aprendizaje y enseñanza de estos estudiantes, ya que los resultados demuestran que sin el uso de estas herramientas el acceso a las clases no hubiese sido posible ni tampoco el desarrollo de las cuatro habilidades lingüísticas del idioma inglés.

Electro-spark deposition (ESD) is one of the most effective methods for improving the surfaces of metallic materials by applying ceramic-based cermet coatings. In this study, TiC and WC coatings were deposited on the surface of AISI M2 high-speed steel using the ESD method. Subsequently, the coated surfaces were examined through microstructure, phase structure, microhardness, friction, wear, and electrochemical corrosion tests, and compared with untreated AISI M2 steel. The TiC and WC phase coatings obtained with ESD resulted in a significant improvement, with hardness levels exceeding four times that of AISI M2 steel, leading to reduced wear volume losses and friction coefficients. Furthermore, the cermet coatings formed on the surface exhibited 2–3 times improvement in corrosion resistance due to their lower conductivity. This study demonstrates that WC coatings may offer a more effective solution for enhancing the wear resistance of AISI M2 steel, while TiC coatings could be more effective in improving corrosion resistance.

Functional neurological disorder (FND) is common in clinic, individual susceptibility and social environment factors play an important role in its pathogenesis, and the prognosis is poor. In recent years, there have been three new diagnostic categories of FND, long corona virus disease (COVID) syndrome, Havana syndrome and TikTok tic syndrome. This article reviews the pathogenesis, clinical manifestations, diagnostic criteria and treatment of long COVID syndrome, Havana syndrome and TikTok tic syndrome in order to assist the diagnosis and treatment of the disease.

This paper discusses a comparative micromechanical and tribological analysis of laser-cladded equiatomic FeNiCr coatings reinforced with TiC and NbC particles. Two types of coatings, FeNiCr-TiC (3 wt.% TiC) and FeNiCr-NbC (3 wt.% NbC), were deposited onto an AISI 1040 steel substrate by means of short-pulsed laser cladding. The chemical composition, microstructure, and micromechanical and tribological characteristics of the coatings were systematically investigated via optical and scanning electron microscopy, Raman spectroscopy, and mechanical and tribological tests. The average thicknesses and compositional transition zones of the coatings were 600 ± 20 μm and 150 ± 20 μm, respectively. Raman spectroscopy revealed that both coatings are primarily composed of a single FCC γ-phase (γ-FeNiCr). The FeNiCr + 3 wt.% TiC coating exhibited an additional TiC phase dispersed within the γ-FeNiCr matrix. In contrast, the FeNiCr + 3 wt.% NbC coating displayed a more homogeneous distribution of finely dispersed NbC phase throughout the composite, leading to enhanced mechanical behavior. Micromechanical characterization showed that the FeNiCr + 3 wt.% NbC coating possessed higher average microhardness (3.8 GPa) and elastic modulus (180 GPa) compared to the FeNiCr + 3 wt.% TiC coating, which had values of ~3.2 GPa and ~156 GPa, respectively. Both coatings significantly exceeded the AISI 1040 steel substrate in tribological performance. The FeNiCr + 3 wt.% TiC and FeNiCr + 3 wt.% NbC coatings exhibited substantial reductions in both weight loss (37% and 41%, respectively) and wear rate (33% and 42%, respectively) compared to the substrate material. These findings indicate that more finely dispersed NbC particles are better suited for hardening laser-cladded equiatomic FeNiCr-NbC coatings, making them advanced candidates for industrial applications.