Online teaching and learning are an alternative paradigm to face-to-face education. It promotes the generation of knowledge through theoretical and methodological processes derived from the development of science and technology in the field of communication and information. With distance education, the teacher undertakes innovative strategies that promote meaningful learning. In this paradigm, the teacher as an educational subject is not excluded, on the contrary, it assumes a new role that transits towards the new culture of distance education based on the diversity of resources that the Web has. The most relevant challenges of this new paradigm are accessibility, personalized system, flexibility in study, and interactivity with better learning materials and resources.
The use of hydrogen as a complementary fuel to internal combustion systems search to obtain automotive machines with individual parameters for sustainable development, providing the hydrogen amount required to be used in diesel cycle engines. The aims of this investigation are to use a dry hydrogen cell prototype to quantify the amount released that is optimal for energetic supply to the diesel cycle in standard operating conditions. This research was conducted under a mixed approach, using an experimental, systematic, descriptive, explanatory, correlational, empirical and in a field context, the variables considered for the development of the research are the amounts of hydrogen, diesel, oxygen, time and concentration of the mixture for the experiments. The prototype presented controlled operating conditions depending on the delivered hydrogen flow to obtain the operating curves of the diesel engine (pressure-volume, temperature-entropy), setting the necessary concentration of the mixture for optimum performance for the internal combustion cycle. The combustion systems evolution with hydrogen will tend to optimize performance when characterizing the supply in a controlled manner, depending on the torque in diesel engines under real operating conditions.
The consumption of avocado is of great importance in the daily diet of the human being, since this fruit contains high levels of Omega 3 and various vitamins (B6, B9 and E) and minerals (magnesium, iron, zinc and phosphorus). Today, Mexico is one of the main avocado producers worldwide. However, the high demand and the low production of this fruit makes the price of avocado more expensive and, therefore, the Mexican population reduces its consumption and seeks nutritional alternatives. For this reason, this research aimed to propose the manufacture of solid avocado tablets (based on pharmaceutical techniques) by granulating and compacting the dehydrated powder of this fruit. This was carried out under a mixed approach by applying quantitative and qualitative technologies to systematic, critical and empirical processes in order to choose the best granulation technique, the ideal binder and the type of compaction to use to achieve solid tablets using dehydrated avocado powder. This tablet aims to preserve the same nutrients as natural avocado and reach all sectors of the population to generate a sustainable and human survival environment.
Due to the alarming climatic situation experienced by all nations, we are in the need to urgently develop and improve sustainable technologies for power generation in order to supply the growing demand for power generation in power systems worldwide. This project aims to design and build a prototype vertical axis wind turbine Savonius analyzed by reverse engineering process by adapting the structure of a tank and taking advantage of its shape and dimensions, with the intention of building a wind turbine with the lowest possible budget, In addition, data from the psychrometric chart of the state of Puebla (winter-spring) will be used so that by means of numerical simulations of fluid flow using CFD software we can obtain the parameters of linear velocity, angular velocity, drag coefficient and projected power that the wind rotor will be able to develop.
The invasive presence of pelagic sargassum on the coasts has increased disproportionately in the last decade, causing great damage to the ecosystems of coastal and marine flora, and fauna, as well as the tourism sector, due to the fact that the sargassum when it enters into decomposition generates fetid odors, detachments of Ammonium concentrations and Hydrogen Sulfide H2S that together with hypoxic conditions were the mass death cause of species, therefore it is necessary to clean affected areas. The aim of this research was to analyze how to reduce erosion in beach dunes, through the technological implementation for the treatment of the mixture sand - dead pelagic sargassum. The methodology had a mixed approach to propose the application of centrifugation and precipitation technologies to significantly reduce beach dunes erosion. However, the machines that do not have this process present a sand-sargassum mixture as residue that, when removed, erodes the dunes. The results obtained were the proposal for the implementation of a new complementary process to those carried out by beach cleaning machines to reduce erosion, in addition to compacting the sargassum for its transfer optimization.
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