When studying the Dirac equation and Maxwell's equations, replacing the current second-order Pauli spin matrices with fourth-order spin matrices reveals that the Dirac equation contains a pair of spins, and the Maxwell’s equations contain spins and Runge-Lenz vector. This book refers to the pair of spins as "dual-spin". The dual-spin matrices are the main components of these equations. Based on the existence of infinite representations of dual-spin matrices, they can be expressed as operators. This book proposes a new representation for Dirac equation and the Maxwell’s equations using these dual-spin operators, and mathematically proves its existence. With the new representation, this book also demonstrates the harmonious unity of the internal structure of the equations and the inherent connection between the two equations, and introduces new symmetries, new solution methods, as well as new approaches to Lorentz transformations by this dual-spin representation. Furthermore, the original Dirac equation only contained one spin, but the author has discovered that there are two spins, which is a breakthrough in cognition.

The attitude motion of a dual-spin spacecraft consisting primarily of two symmetric bodies with a common axis of rotation and a constant relative spin rate is analyzed. Each of the main bodies contains a spring-mass-dashpot damper with a degree of freedom parallel to their common axis. The equations of motion are studied by means of a perturbation analysis in which only the damper masses are assumed small. The problem then becomes the determination of perturbations to a reference motion which is similar to the general precession of the torque-free rigid body in classical mechanics. One of the key parameters associated with such motion is the nutation angle (or the angle between the nominal spin axis and the inertially-fixed angular momentum vector). By determining the zeroth and first order behavior of this angle for this system, a general analytical stability criterion is established. This criterion not only determines the stability or instability of an arbitrary initial state of the system, but reveals the nature of any instability which might exist. In reduced form, the stability criterion verifies results in the recent literature obtained by Routhian and Floquet analyses of linearized equations representing special cases of this system.

From the concert stage to the dressing room, from the recording studio to the digital realm, SPIN surveys the modern musical landscape and the culture around it with authoritative reporting, provocative interviews, and a discerning critical ear. With dynamic photography, bold graphic design, and informed irreverence, the pages of SPIN pulsate with the energy of today's most innovative sounds. Whether covering what's new or what's next, SPIN is your monthly VIP pass to all that rocks.

In mathematical physics, the correspondence between quantum and classical mechanics is a central topic, which this book explores in more detail in the particular context of spin systems, that is, SU(2)-symmetric mechanical systems. A detailed presentation of quantum spin-j systems, with emphasis on the SO(3)-invariant decomposition of their operator algebras, is first followed by an introduction to the Poisson algebra of the classical spin system and then by a similarly detailed examination of its SO(3)-invariant decomposition. The book next proceeds with a detailed and systematic study of general quantum-classical symbol correspondences for spin-j systems and their induced twisted products of functions on the 2-sphere. This original systematic presentation culminates with the study of twisted products in the asymptotic limit of high spin numbers. In the context of spin systems it shows how classical mechanics may or may not emerge as an asymptotic limit of quantum mechanics. The book will be a valuable guide for researchers in this field and its self-contained approach also makes it a helpful resource for graduate students in mathematics and physics.

This book provides an update on our understanding of strong interaction, with theoretical and experimental highlights included. It is divided into five sections. The first section is devoted to the investigations into and the latest results on the mechanism of quark confinement. The second and third sections focus respectively on light and heavy quarks (effective field theories, Schwinger-Dyson approach and lattice QCD results). The fourth section deals with the deconfinement mechanism and quark-gluon plasma formation signals. The last section presents highlights of experiments, new physics beyond QCD, and nonperturbative approaches in other theories (strings and SUSY) that may be useful in QCD.

Explores the meaning & significance of the concepts of spin-off, dual-use & conversion. A case study at Ericsson Radar Electronics also illustrates the problems & opportunities of diversification.

This special edition of The Templeton Twins Have an Idea: Book One also includes a sneak preview of The Templeton Twins Make a Scene: Book Two and a Q&A with the author. Suppose there were 12-year-old twins, a boy and girl named John and Abigail Templeton. Let's say John was pragmatic and played the drums, and Abigail was theoretical and solved cryptic crosswords. Now suppose their father was a brilliant, if sometimes confused, inventor. And suppose that another set of twins—adults—named Dean D. Dean and Dan D. Dean, kidnapped the Templeton twins and their ridiculous dog in order to get their father to turn over one of his genius (sort of) inventions. Yes, I said kidnapped. Wouldn't it be fun to read about that? Oh please. It would so. Luckily for you, this is just the first in a series perfect for boys and girls who are smart, clever, and funny (just like the twins), and enjoy reading adventurous stories (who doesn't?!).