Numerical Optimization and Energetic Advantages of an Innovative Solar Power System Based on Scheffler Receiver Coupled with Volumetric Expanders

In the current context of increasing public awareness of the externalities of fossil fuel-based energy consumption, improvement in new technologies for energy-saving systems has become a crucial target to reduce both global warming and air pollution. Being motivated by such a critical matter, this study presents an innovative solar thermal plant based on volumetric expanders as work-producing devices coupled with Scheffler solar receivers as a thermal source. Nowadays, Scheffler receivers are well performing owing to high efficiency of the focal receiver which reduce heat losses. Simultaneously, screw expanders are volumetric machines which are able to convert thermal to mechanical power with acceptable efficiency also by expanding vapor-liquid blends at low operating pressures. The numerical model presented in this study evaluates the energetic benefits of the proposed solar power system for various operating situations. Parametric optimization of this solar power plant is then performed in a broad range of operating conditions: the optimum evaporation temperatures, together with the corresponding maximum global efficiencies, were so defined under various solar radiation intensities. The numerical results attained in this research prove that solar electricity generation systems based on screw expanders coupled with the Scheffler receivers are a promising technology.

Linseed Oil and Xanthan Gum: Promising Stabilisers for Earthen Building Materials

In the current context, the development of new bio-based and local building materials is becoming mandatory. Among them, earthen materials have a strong potential to be used as sustainable structural materials but their variability and their water sensitivity impact their mechanical properties that are difficult to guaranty. Recent developments have emphasised the ability of some bio-based additions to help to ensure these properties: linseed oil and xanthan gum are part of them. In this paper three different Breton earths, representative of a certain local variability, are studied. The impact of the selected bio-based additions on earths’ rheological behaviour is followed in order to adapt it to different forming processes. Then, the mechanical properties of different earth-addition combinations at the dry state, exposed to hygric variations and immersion are investigated for different forming processes. The findings highlight the fact that xanthan gum and linseed oil have a relevant ability to stabilise earthen blocks, that can be processed using different promising forming methods.

Digital Skills in Times of the COVID-19 Pandemic

This chapter describes the digital competencies that have become essential in the workforce and how higher education institutions (HEIs) are trying to keep up in a moment in which faculty members have been acquiring digital skills alongside students. A field study was conducted with faculty from HEIs in Mexico to identify the differences between the digital skills that faculty possessed previous to the pandemic and those acquired as a result of remote work. It also analyzes the digital tools they have been provided with to perform their jobs, the training they have received, and the digital skills that they still lack to help students acquire the digital competencies demanded in the workforce. The objective is to identify areas of opportunity and create general guidelines that will help develop critical digital skills. A literature review of the most relevant aspects of digital dexterity and digital competence in higher education (HE) is presented. An analysis of the current context and how it is producing changes faster than before is also included.

Gamified Learning

In the context of the current COVID-19 pandemic, e-learning represents a more and more important concern of all education providers and an inevitable direction for the current context in training and education. This chapter follows the theory of gamified learning and the theory of flow to understand to which extent game characteristics improve engagement and learning outcomes, such as performance and engagement. To do this, two groups of learners (N=20) were randomly assigned: the experimental group followed a gamified learning module, and the control group followed the same content without gamification mechanisms. The game mechanisms chosen involve a game, a challenge, virtual rewards, an avatar, a final badge, and a system of points and levels. Results show that the gamified course increased the time spent on the course and the overall performance. Hence, this chapter demonstrates the relevance of using gamification to improve learning outcomes.

Social impact assessment in the mining industry

Social responsibility for sustainability has become an important dimension in the current context. More and more industries are evaluating this responsibility and are actively involved in addressing human resources to increase motivation, communication and reduce negative factors. The mining industry is important, especially from the perspective of sustainability. For these reasons, this paper reviews the social impact in the mining industry and provides a framework of social indicators for this industry. The methodology used is based on a qualitative assessment of the importance of indicators for industry. This framework is developed based on various social impact reporting tools. This approach can be extended to other fields of activity following the adaptation of its applicability. The main conclusions show that social responsibility is important for the mining industry.

Autoethnography in Information Science Research

This chapter examines the concept of autoethnography as a qualitative research method. It aimed to investigate the critical question of the importance of autoethnography as a transformative scientific research method for the purpose of generating and sharing knowledge to advance research in information science. The chapter is an exploratory study investigating the current context of autoethnography in information science, its applicability to the field for transformative learning and knowledge sharing, and possible challenges to be experienced. Findings indicate the potential of the autoethnographic method to provide the opportunity for information professionals to study experiences of information use in diverse contexts of information science. Recommendations highlight the viability of the application of sense making theory and the information search process (ISP) model to research practices in autoethnography by information scientists.

Social Impact Indicators in the Context of the Roma Community: Contributions to the Debate on Methodological Implications

Researching with methodologies focused on social impact in line with the SDGs is one of the priority orientations of the Horizon Europe program, as shown in the official European Commission document on impacts for this program. In this sense, researchers must forecast how their project will improve citizens' lives. Until now, many investigations showed the evaluation of the social impact through knowledge transfer activities that, although undoubtedly important, are not enough since the social impact is defined as the improvements derived from using the knowledge transferred to society. The search for the social impact of new research requires the introduction of impact indicators from the design, throughout the project development, and when the project ends. The introduction of indicators, in particular if they are decided in dialogue with the participants, allows not only to foresee a greater social impact but also to improve and adjust the methodology to be used. We explore this aspect in the context of research with social impact that starts from how the COVID-19 pandemic is increasing the inequalities suffered by the Roma population, causing the aggravation and creation of new problems and needs. Thus, we explain in detail how the selection of indicators that monitor the social impact, in dialogue with the Roma population, allows the design of research projects that are more appropriate to the current context.

Nanotechnology in veterinary medicine: a review

ABSTRACT: The purpose of this review was to address the applicability of nanotechnology in veterinary medicine, with an emphasis on research in Brazil from 2013 to 2020. Firstly, we introduced to the general aspects of applicability of nanotechnology in veterinary medicine, and lately we pointed the research involving nanoscience performed in Brazil, in the studied period. Nanotechnology is the field of science that has the capacity to organize matter in nanoscale structures (1 to 100 nm), enabling innovations in different areas including biotechnology, agriculture, disease diagnosis, food and clothing industry, electronics, and pharmacological therapies. In veterinary medicine, several studies are being carried out in the world, mainly in the areas that involve search of new treatment options and the development of immunotherapy, as well as in the diagnosis of diseases. In Brazil, it is clear that the use of nanotechnology in veterinary medicine is still incipient, but it can be considered a growing area. In addition, several points have to be reflected and researched, including some adverse effects and implications to validate the safe use of nanotechnology in veterinary medicine. Therefore, this review highlighted the nanotechnology as a promise alternative in the current context of Brazilian technological innovation involving animal health, as well as a possible diagnostic tool and highlighting its potential therapeutic use in disease control in veterinary medicine. Regarding future perspectives, we believed that greater investment in science and technology could contribute to the advancement and strengthening of nanotechnology in Brazil.

Job Shadowing as a Training Tool for Lecturers in Higher Education Bilingual Teaching

The current context of higher education institutions is guided by targets of internationalization and globalization which adopt different forms, one of them based on the essential role of language learning as an operational instrument that contributes to international activity. Different approaches have been devised to promote language learning—content and language integrated learning (CLIL) or English-medium instruction (EMI)—characterized by the use of a foreign language as a teaching device. In tertiary education, the implementation of bilingual programs demands the use of professional and academic language, communicative skills, and training in methodological abilities. The challenge for lecturers is considerable and they have reported the demanding overload of work, effort, and time, but training in dual-focused teaching is essential to achieve goals successfully. Job shadowing is suggested as a training tool focused on developing bilingual professional skills, knowledge, and competences through observation, action, and reflection while accompanying a professional.

Assessment of the Miller cycle operation in a spark ignition engine via 1D numerical simulation

The article presents the results of a 1D numerical simulation of a spark ignition engine developed to operate in Miller cycle. Miller cycle offers better thermal efficiency compared to Otto cycle due to higher volumetric expansion than compression, which in the current context is of paramount importance. In an engine with fixed geometric compression ratio, Miller cycle operation could be realized by means of either early intake valve closing (EIVC) or late intake valve closing (LIVC). Both cases lead however to a lower volumetric efficiency, thus reducing the indicating mean effective pressure, which in its turn results to a lower power output. The simulation’s aim is not only to assess the impact of implementing the Miller cycle but also to obtain the necessary results for imposing the boundary conditions in a 3D CFD simulation whose purpose is to analyse the influence of the Miller cycle on the internal aerodynamics of the engine.