1,721,289 research outputs found
What is an Electron?
No full textThis book offers an in-depth exploration of one of the fundamental particles that has shaped our understanding of the physical world and revolutionized technology, combining historical narrative with rigorous scientific analysis to provide a comprehensive account of the electron.
Starting from the early atomic models of Democritus and Dalton, the book traces the journey through key experiments such as J.J. Thomson's discovery of the electron, Rutherford's model, and Bohr's contributions. It discusses how these foundational experiments and theories have paved the way for modern quantum mechanics.
Each chapter looks at significant milestones, from the photoelectric effect and the discovery of electron spin to quantum tunneling and entanglement. The book also addresses the electron’s strange properties and its relatives, such as positrons, muons, and tau particles, providing a detailed examination of their roles in the broader context of quantum field theory.
The author draws from original sources to ensure accuracy and authenticity, making this work a reliable reference for students and enthusiasts alike. The text is written in accessible language, carefully explaining complex concepts without overwhelming the reader with intricate mathematical formulations.
With many illustrative figures, "What is an Electron?" serves as an essential resource for undergraduate students in physics, chemistry, and materials science, as well as for scientifically-curious readers eager to understand the profound implications of electron behavior in quantum mechanics and modern technology
Le città della conoscenza, università e parchi scientifici nel processo di urbanizzazione cinese
No full text
Mesoporous ordered films via self-assembly: trends and perspectives
No full textThe synthesis of ordered mesoporous films via self-assembly represents one of the main accomplishments in nanoscience. In fact, controlling the complex chemical–physical phenomena that govern the process triggered by the solvent's fast evaporation during film deposition has represented a challenging task. Several years after the first articles on the subject, the research in the field entered a new stage. New advanced applications based on the peculiar properties of mesoporous films are envisaged while basic research is still going on, especially to clarify the mechanism behind self-organization in a spatially defined environment and the physics and chemistry in mesoscale porosity. This review has been dedicated to analysing the main trends in the fields and the perspective for future developments
The mechanics of self-propelled wagons from Francesco di Giorgio
No full textDuring the Renaissance, the idea of a complex mechanical system capable of moving on its own, a forerunner idea of our modern automobile, found its first designs and exploratory conceptualization. In particular, it will be one of the so-called "Sienese engineers", Francesco di Giorgio, the first to systematically explore the mechanics of self-propelled wagons as part of his studies of machines which will later become part of the Treaty of Architecture. Francesco di Giorgio's self-propelled machines still lack an engine and are set in motion by human power, but their mechanics are already highly sophisticated and ahead of their time. Thanks to the various manuscripts that have been preserved, his legacy in this area is still entirely available and facilitates the understanding of the development of the projects and the attempt to design machines for practical uses as well as the theoretical approach to engineering during the Renaissance
- …
