Understand the fundamental basis of spaceflight with this cutting-edge guide As spacecraft engineering continues to advance, so too do the propulsion methods by which humans explore the solar system and will seek out the stars. Electric rocket propulsion has been the subject of considerable innovation and application in recent years, with thousands of electric thrusters now operating in space. For professionals in spacecraft engineering and closely related fields, this book provides critical knowledge that can alter the future of space flight. Fundamentals of Electric Propulsion offers a thorough grounding in electric propulsion for spacecraft, particularly the features and mechanisms underlying electrostatic and electromagnetic thrusters. Updated in the light of rapidly expanding knowledge, the second edition of this essential guide covers thruster principles, plasma physics, and more. It reflects the significant accomplishments by NASA’s Jet Propulsion Laboratory in this field, and promises to be a must-own volume for spacecraft engineering professionals. Readers of the second edition of Fundamentals of Electric Propulsion readers will also find: Extensive updates to chapters covering hollow cathodes and Hall thrusters, based on recent research results New chapters covering magnetic shielding in Hall thrusters, electromagnetic propulsion, future directions in research and development, and more Figures and homework problems in each chapter to facilitate learning and retention Fundamentals of Electric Propulsion is an essential work for spacecraft engineers and researchers working in spacecraft propulsion and related fields, as well as graduate students in electric propulsion, aerospace science, and space science courses.

The last decade has seen a rapid growth in our understanding of the cognitive systems that underlie mathematical learning and performance, and an increased recognition of the importance of this topic. This book showcases international research on the most important cognitive issues that affect mathematical performance across a wide age range, from early childhood to adulthood. The book considers the foundational competencies of nonsymbolic and symbolic number processing before discussing arithmetic, conceptual understanding, individual differences and dyscalculia, algebra, number systems, reasoning and higher-level mathematics such as formal proof. Drawing on diverse methodology from behavioural experiments to brain imaging, each chapter discusses key theories and empirical findings and introduces key tasks used by researchers. The final chapter discusses challenges facing the future development of the field of mathematical cognition and reviews a set of open questions that mathematical cognition researchers should address to move the field forward. This book is ideal for undergraduate or graduate students of psychology, education, cognitive sciences, cognitive neuroscience and other academic and clinical audiences including mathematics educators and educational psychologists.

The last decade has seen a rapid growth in our understanding of the cognitive systems that underlie mathematical learning and performance, and an increased recognition of the importance of this topic. This book showcases international research on the most important cognitive issues that affect mathematical performance across a wide age range, from early childhood to adulthood. The book considers the foundational competencies of nonsymbolic and symbolic number processing before discussing arithmetic, conceptual understanding, individual differences and dyscalculia, algebra, number systems, reasoning and higher-level mathematics such as formal proof. Drawing on diverse methodology from behavioural experiments to brain imaging, each chapter discusses key theories and empirical findings and introduces key tasks used by researchers. The final chapter discusses challenges facing the future development of the field of mathematical cognition and reviews a set of open questions that mathematical cognition researchers should address to move the field forward. This book is ideal for undergraduate or graduate students of psychology, education, cognitive sciences, cognitive neuroscience and other academic and clinical audiences including mathematics educators and educational psychologists.

This book identifies chances and barriers women face in their transition to adulthood in Egypt, Iran, Jordan, and Syria. Adopting a life course perspective, it provides a new integrative micro-macro-theoretical framework and innovative analyses of individual life courses based on longitudinal data.

This book identifies chances and barriers women face in their transition to adulthood in Egypt, Iran, Jordan, and Syria. Adopting a life course perspective, it provides a new integrative micro-macro-theoretical framework and innovative analyses of individual life courses based on longitudinal data.

Organisatorische Veranderungen werden in Industrie und Dienstleistung immer mehr zu einem Mittel der Wettbewerbssicherung. Haufig dauern sie jedoch nicht nur zu lange, sondern scheitern im Alltagsgeschaft, meist aufgrund ungeloster Ziel- und Interessenkonflikte. Dies kostet die Unternehmen nicht nur viel Zeit und Geld, sondern nahrt auch Zweifel an der Innovationskompetenz ihrer Fuhrungskrafte. Der Autor beschreibt anhand zahlreicher Praxisbeispiele Grundlagen und Methoden eines wirksamen und effizienten Innovationsmanagements, das durch ein zielgerichtetes Political Engineering aus einem Gegeneinander ein Miteinander der Interessen macht. Dabei behandelt er nicht nur die Aufgaben von Managern, sondern auch von Betriebsraten als Co-Manager organisatorischer Veranderungen."

Organisatorische Ver nderungen werden in Industrie und Dienstleistung immer mehr zu einem Mittel der Wettbewerbssicherung. H ufig dauern sie jedoch nicht nur zu lange, sondern scheitern im Alltagsgesch ft, meist aufgrund ungel ster Ziel- und Interessenkonflikte. Dies kostet die Unternehmen nicht nur viel Zeit und Geld, sondern n hrt auch Zweifel an der Innovationskompetenz ihrer F hrungskr fte. Der Autor beschreibt anhand zahlreicher Praxisbeispiele Grundlagen und Methoden eines wirksamen und effizienten Innovationsmanagements, das durch ein zielgerichtetes Political Engineering aus einem Gegeneinander ein Miteinander der Interessen macht. Dabei behandelt er nicht nur die Aufgaben von Managern, sondern auch von Betriebsr ten als Co-Manager organisatorischer Ver nderungen.

Grundlagen und Mechanismus der Sklerosierungstherapie bei Varizen, Oesophagusvarizen, Varikozelen und Organzysten. Grundlagen, Theorie und Praxis.