Teaching for 3 Cs: centering imagination in teacher education

In view of globalization, bureaucratization, marketization and commercialization, the context of education has changed. In response, the critical capacities of student teachers need to be developed so that they better understand and empathize with one-another and are able to see the complexities of the world through multiple perspectives. This, in turn, necessarily requires nurturing of imagination, which we consider in relation to the 3Cs: Care, Critique and Creativity. We commence with an overview of current developments affecting education and review existing practices in teacher education. We then provide the context of a practicebased enquiry that used metaphors and objects to explore student teachers’ understanding of personal experiences. We conclude with connecting the reflective process of the enquiry to the nurturing of imagination and the 3Cs

Teaching for 3 Cs: centring imagination in teacher education

In view of globalization, bureaucratization, marketization and commercialization, the context of education has changed. In response, the critical capacities of student teachers need to be developed so that they better understand and empathize with one-another and are able to see the complexities of the world through multiple perspectives. This, in turn, necessarily requires nurturing of imagination, which we consider in relation to the 3Cs: Care, Critique and Creativity. We commence with an overview of current developments affecting education and review existing practices in teacher education. We then provide the context of a practice-based enquiry that used metaphors and objects to explore student teachers’ understanding of personal experiences. We conclude with connecting the reflective process of the enquiry to the nurturing of imagination and the 3Cs

Magnon-photon coupling in the noncollinear magnetic insulator Cu 2 OSeO 3

Anticrossing behavior between magnons in the noncollinear chiral magnet Cu2OSeO3 and a two-mode X-band microwave resonator was studied in the temperature range 5–100 K. In the field-induced ferrimagnetic phase, we observed a strong-coupling regime between magnons and two microwave cavity modes with a cooperativity reaching 3600. In the conical phase, cavity modes are dispersively coupled to a fundamental helimagnon mode, and we demonstrate that the magnetic phase diagram of Cu2OSeO3 can be reconstructed from the measurements of the cavity resonance frequency. In the helical phase, a hybridized state of a higher-order helimagnon mode and a cavity mode—a helimagnon polariton—was found. Our results reveal a class of magnetic systems where strong coupling of microwave photons to nontrivial spin textures can be observed

Effect of two different heat transfer fluids on the performance of solar tower csp by comparing recompression supercritical co2 and rankine power cycles, china

China intends to develop its renewable energy sector in order to cut down on its pollution levels. Concentrated solar power (CSP) technologies are expected to play a key role in this agenda. This study evaluated the technical and economic performance of a 100 MW solar tower CSP in Tibet, China, under different heat transfer fluids (HTF), i.e., Salt (60% NaNO3 40% KNO3 ) or HTF A, and Salt (46.5% LiF 11.5% NaF 42% KF) or HTF B under two different power cycles, namely supercritical CO2 and Rankine. Results from the study suggest that the Rankine power cycle with HTF A and B recorded capacity factors (CF) of 39% and 40.3%, respectively. The sCO2 power cycle also recorded CFs of 41% and 39.4% for HTF A and HTF B, respectively. A total of 359 GWh of energy was generated by the sCO2 system with HTF B, whereas the sCO2 system with HTF A generated a total of 345 GWh in the first year. The Rankine system with HTF A generated a total of 341 GWh, while the system with B as its HTF produced a total of 353 GWh of electricity in year one. Electricity to grid mainly occurred between 10:00 a.m. to 8:00 p.m. throughout the year. According to the results, the highest levelized cost of energy (LCOE) (real) of 0.1668 USD/kWh was recorded under the Rankine cycle with HTF A. The lowest LCOE (real) of 0.1586 USD/kWh was obtained under the sCO2 cycle with HTF B. In general, all scenarios were economically viable at the study area; however, the sCO2 proved to be more economically feasible according to the simulated results. © 2021 by the authors. Licensee MDPI, Basel, Switzerland

An improved algorithm for optimal load shedding in power systems

A blackout is usually the result of load increasing beyond the transmission capacity of the power system. A collapsing system enters a contingency state before the blackout. This contingency state is characterized by a decline in the bus voltage magnitudes. To avoid blackouts, power systems may start shedding load when a contingency state occurs called under voltage load shedding (UVLS). The success of a UVLS scheme in arresting the contingency state depends on shedding the optimum amount of load at the optimum time and location. This paper proposes a hybrid algorithm based on genetic algorithms (GA) and particle swarm optimization (PSO). The proposed algorithm can be used to find the optimal amount of load shed for systems under stress (overloaded) in smart grids. The proposed algorithm uses the fast voltage stability index (FVSI) to determine the weak buses in the system and then calculates the optimal amount of load shed to recover a collapsing system. The performance analysis shows that the proposed algorithm can improve the voltage profile by 0.022 per units with up to 75% less load shedding and a convergence time that is 53% faster than GA

Coupling of erbium-implanted silicon to a superconducting resonator

Erbium-implanted silicon is promising for both photonic and quantum-technology platforms, since it possesses both telecommunications and integrated-circuit processing compatibility. However, several different Er centers are generated during the implantation and annealing process, the presence of which could hinder the development of these applications. When Si is coimplanted with 10 17 cm − 3 Er and 10 20 cm − 3 O ions, and the appropriate annealing process is used, one of these centers, which is present at higher Er concentrations, can be eliminated. Characterization of samples with Er concentrations of < 10 17 cm − 3 is limited by the sensitivity of standard electron paramagnetic resonance (EPR) instruments. The collective coupling strength between a superconducting (SC) Nb N lumped-element resonator and a 10 17 cm − 3 Er -implanted Si sample at 20 mK is measured to be about 1 MHz, which provides a basis for the characterization of low-concentration Er -implanted Si and for future networks of hybrid quantum systems that exchange quantum information over the telecommunication network. Of six known Er -related EPR centers, only one trigonal center couples to the SC resonator

Decarbonize Russia — A Best–Worst Method Approach for Assessing the Renewable Energy Potentials, Opportunities and Challenges

Russia is known to be a country with enormous energy resources both renewables and non-renewables. Much of the country's effort towards energy generation has been on the development of the non-renewables over the years. This study examined the opportunities and challenges in Russia's Renewable energy (RE) sector. By coupling both interviews and literature reviews, a total of 8 main opportunities and 7 key challenges were identified and discussed. The Best–Worst-Method was used to assign weights to the various factors using inputs of 30 experienced experts in Russia's RE sector. According to the obtained results, the most significant opportunity that the country would have to take advantage of is the opportunity to export RE outside the shores of the country, it recorded 27.7 percent. This is followed by the country's target for the RE sector which scored 18%, hydrogen production and need to meet local energy requirements followed with 12% each. The greatest challenge which also serve as a hindrance to the development of RE in the country is the low attention given to clean technologies from government, it recorded a weight of 31.4%. This is followed by unequal playing field, and strict local content requirements which recorded 17.9% and 13.5%, respectively. The study ended with some strategic recommendations to authorities for the development of the sector. © 2021 The Authors