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26,610 result(s) for "critical materials"
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Making thinking visible : how to promote engagement, understanding, and independence for all learners
\"Visible Thinking is a research-based approach to teaching thinking that develops students' thinking dispositions, while at the same time deepening their understanding of the topics they study. Rather than a set of fixed lessons, Visible Thinking is an extensive and adaptable collection of practices that include thinking routines and the documentation of student thinking. The routines are a central element of the practical, functional and accessible nature of Visible Thinking. Thinking routines are easy to use mini-strategies that are repeatedly used in the classroom. They are a small set of questions or a short sequence of steps that can be used across various grade levels and content. Each routine targets a different type of thinking and by bringing their own content, teachers can integrate the routines into the fabric of their classrooms. Thinking Routines help direct student thinking and structure classroom discussion. Thinking becomes visible as the students' different viewpoints are expressed, documented, discussed and reflected upon\"-- Provided by publisher.
Technology for the Recovery of Lithium from Geothermal Brines
Lithium is the principal component of high-energy-density batteries and is a critical material necessary for the economy and security of the United States. Brines from geothermal power production have been identified as a potential domestic source of lithium; however, lithium-rich geothermal brines are characterized by complex chemistry, high salinity, and high temperatures, which pose unique challenges for economic lithium extraction. The purpose of this paper is to examine and analyze direct lithium extraction technology in the context of developing sustainable lithium production from geothermal brines. In this paper, we are focused on the challenges of applying direct lithium extraction technology to geothermal brines; however, applications to other brines (such as coproduced brines from oil wells) are considered. The most technologically advanced approach for direct lithium extraction from geothermal brines is adsorption of lithium using inorganic sorbents. Other separation processes include extraction using solvents, sorption on organic resin and polymer materials, chemical precipitation, and membrane-dependent processes. The Salton Sea geothermal field in California has been identified as the most significant lithium brine resource in the US and past and present efforts to extract lithium and other minerals from Salton Sea brines were evaluated. Extraction of lithium with inorganic molecular sieve ion-exchange sorbents appears to offer the most immediate pathway for the development of economic lithium extraction and recovery from Salton Sea brines. Other promising technologies are still in early development, but may one day offer a second generation of methods for direct, selective lithium extraction. Initial studies have demonstrated that lithium extraction and recovery from geothermal brines are technically feasible, but challenges still remain in developing an economically and environmentally sustainable process at scale.
History education in the formation of social identity : toward a culture of peace
\"Despite the widespread acknowledgement that how people and groups understand their history plays a key role in the formation of their social identity, there has heretofore been only limited research on the mechanisms that bring this about. This book examines the critical points in identity formation that history education helps to create. It establishes how history curricula and textbooks shape the identities of their readers through their portrayals of borders and boundaries between social groups, their depictions of relations between minority and majority groups, the value systems they embody, the leaders they hold up as exemplars, and the stories they choose to tell. Korostelina shows how all these attributes of history curricula can be harnessed to reduce conflict attitudes and intentions and create a culture of peace, beginning with the history curriculum\"-- Provided by publisher.
Evaluations of Quality by Design (QbD) Elements Impact for Developing Niosomes as a Promising Topical Drug Delivery Platform
Topical corticosteroids are used to treat a variety of skin conditions such as allergic reactions, eczema, and psoriasis. Niosomes are a novel surfactant-based delivery system that may be used to deliver desoximetasone via topical product application in order to mitigate common side effects associated with traditional oral delivery routes. The aim of this research was to identify the critical material attributes (CMAs) and critical process parameters (CPPs) that impact key characteristics of drug-loaded niosomes using a systematic quality by design (QbD) approach. An organic phase injection method was developed and used to manufacture the niosomes. The CMAs were identified to be drug amount, concentrations of surfactant and cholesterol, and types of lipids. The CPPs were phase volumes, temperature, mixing parameters, and addition rate based on previous research. The quality attributes measured were entrapment efficiency, particle size distribution, PDI, and zeta potential. These were used to determine the quality target product profile (QTPP) of niosomes. The experimental data indicate that the critical impacting variables for niosomes are: surfactant and cholesterol concentrations, mixing parameters, and organic-phase addition rate. Based on the experimental results of this study methanol:diethyl ether (75:25) as the organic system, drug:surfactant:cholesterol in 1:2:1 concentration, stearic acid as the charge-inducing material, 20 mL external phase and 10 mL internal phase volume, 65 °C external phase temperature, 60 min mixing time, 650 RPM mixing speed and 1 mL/ml addition rate is the ideal combination to achieve desirable desoximetasone niosomes with optimum entrapment efficiency and particle size for topical application.
Creating cultures of thinking : the 8 forces we must master to truly transform our schools
\"Discover why and how schools must become places where thinking is valued, visible, and actively promoted. As educators, parents, and citizens, we must settle for nothing less than environments that bring out the best in people, take learning to the next level, allow for great discoveries, and propel both the individual and the group forward into a lifetime of learning. This is something all teachers want and all students deserve. In Creating Cultures of Thinking: The 8 Forces We Must Master to Truly Transform Our Schools, Ron Ritchhart, author of Making Thinking Visible, explains how creating a culture of thinking is more important to learning than any particular curriculum and he outlines how any school or teacher can accomplish this by leveraging 8 cultural forces: expectations, language, time, modeling, opportunities, routines, interactions, and environment. With the techniques and rich classroom vignettes throughout this book, Ritchhart shows that creating a culture of thinking is not about just adhering to a particular set of practices or a general expectation that people should be involved in thinking. A culture of thinking produces the feelings, energy, and even joy that can propel learning forward and motivate us to do what at times can be hard and challenging mental work\"-- Provided by publisher.
Phosphorus recovery methods from secondary resources, assessment of overall benefits and barriers with focus on the Nordic countries
Phosphorus (P) recovery and recycling play a crucial role in improving resource efficiency, sustainable nutrient management and moving toward circular economy. Increasing demand for fertilizers, signs of geopolitical constraints, and high discharge of P to waterbodies are the other reasons to pursue the circularity of P. Various research have been carrying out and several processes have been developed for P-recovery from different resources. However, there is still a huge unexplored potential for P-recovery specially in the regional framework from the four main P-rich waste resources: food waste, manure, mining waste, and sewage sludge. This study reviews recovery methods of P from these secondary resources comprehensively. Additionally, it analyzes the Nordic viewpoint of P-cycle by evaluating Nordic reserves, demands, and secondary resources to gain a systematic assessment of how Nordic countries could move toward circular economy of P. Results of this study show that secondary resources of P in Nordic countries have the potential of replacing mineral fertilizer in these countries to a considerable extent. However, to overcome the challenges of P-recovery from studied resources, policymakers and researchers need to take decisions and make innovation along each other to open the new possibilities for Nordic economy.
Teaching Harry Potter : the power of imagination in multicultural classrooms
\"Given the current educational climate of high stakes testing, standardized curriculum, and \"approved\" reading lists, incorporating unauthorized, often controversial, popular literature into the classroom becomes a political choice. The authors examine why teachers choose to read Harry Potter, how they use the books and incorporate new media, and the resulting teacher-student interactions. The book encourages a critical discussion regarding the state of our educational system and the increasing lack of space allowed for imagination and complexity. Its unique research methodology is part ethnographic, part practitioner research, and serves as an analytical commentary on current school culture and policy\"-- Provided by publisher.
Building a Circular Economy for Lithium: Addressing Global Challenges
As countries worldwide race toward a green transition, the demand for electric vehicles is surging, and with it comes a growing need for batteries. However, the push for increased domestic mining to secure these materials raises significant concerns about environmental sustainability. Even with stringent regulations, the environmental impact of mining can be profound, posing risks such as biodiversity loss, water pollution, and broader ecological damage. Furthermore, geopolitical tensions could arise as countries whose economic interests are threatened by these initiatives may react adversely. Local communities might also resist mining projects due to concerns over environmental degradation, health risks, and disruptions to their livelihoods. Given the critical importance of metals in the ecological transition, this challenge must be approached with the same urgency and global coordination as a pandemic response. Just as the world mobilized unprecedented resources to tackle COVID‐19, a similarly robust approach is necessary to ensure the availability of critical metals for a sustainable future. This paper suggests potential pathways for academic, technological, and societal advancements within the framework of a circular economy for lithium, aiming to secure a sustainable supply of this essential resource. The paper discusses the implications of the growing demand for lithium due to the global shift toward electric vehicles and renewable energy. It highlights the environmental and geopolitical challenges associated with increased lithium mining. The paper also emphasizes the need for sustainable practices, recycling, and global cooperation to ensure a steady supply of this critical resource while minimizing ecological impact.
College student voices on educational reform : challenging and changing conversations
\"This text critically addresses, through college student voices, the American school reform movement in its rhetoric, policy and practice. Drawing from a course taught by McKenna, Collier, and Burke, this book provides theoretical and practical demonstrations of how a university course can treat students, many of them future teachers, as engaged citizens and contributors to discussions of education and society. It showcases work done by students in the process of learning education reform policy, discusses the obstacles and problems encountered as students join conversations on reform at both their university and in society at large, and examines the particular ways in which authoritative discourse and personal experience come to form knowledge at the university level\"-- Provided by publisher.
Application of Ionic Liquids for the Recycling and Recovery of Technologically Critical and Valuable Metals
Population growth has led to an increased demand for raw minerals and energy resources; however, their supply cannot easily be provided in the same proportions. Modern technologies contain materials that are becoming more finely intermixed because of the broadening palette of elements used, and this outcome creates certain limitations for recycling. The recovery and separation of individual elements, critical materials and valuable metals from complex systems requires complex energy-consuming solutions with many hazardous chemicals used. Significant pressure is brought to bear on the improvement of separation and recycling approaches by the need to balance sustainability, efficiency, and environmental impacts. Due to the increase in environmental consciousness in chemical research and industry, the challenge for a sustainable environment calls for clean procedures that avoid the use of harmful organic solvents. Ionic liquids, also known as molten salts and future solvents, are endowed with unique features that have already had a promising impact on cutting-edge science and technologies. This review aims to address the current challenges associated with the energy-efficient design, recovery, recycling, and separation of valuable metals employing ionic liquids.