This text focuses on conservation laws in magnetohydrodynamics, gasdynamics and hydrodynamics. A grasp of new conservation laws is essential in fusion and space plasmas, as well as in geophysical fluid dynamics; they can be used to test numerical codes, or to reveal new aspects of the underlying physics, e.g., by identifying the time history of the fluid elements as an important key to understanding fluid vorticity or in investigating the stability of steady flows. The ten Galilean Lie point symmetries of the fundamental action discussed in this book give rise to the conservation of energy, momentum, angular momentum and center of mass conservation laws via Noether's first theorem. The advected invariants are related to fluid relabeling symmetries - so-called diffeomorphisms associated with the Lagrangian map - and are obtained by applying the Euler-Poincare approach to Noether's second theorem. The book discusses several variants of helicity including kinetic helicity, cross helicity, magnetic helicity, Ertels' theorem and potential vorticity, the Hollman invariant, and the Godbillon Vey invariant. The book develops the non-canonical Hamiltonian approach to MHD using the non-canonical Poisson bracket, while also refining the multisymplectic approach to ideal MHD and obtaining novel nonlocal conservation laws. It also briefly discusses Anco and Bluman's direct method for deriving conservation laws. A range of examples is used to illustrate topological invariants in MHD and fluid dynamics, including the Hopf invariant, the Calugareanu invariant, the Taylor magnetic helicity reconnection hypothesis for magnetic fields in highly conducting plasmas, and the magnetic helicity of Alfven simple waves, MHD topological solitons, and the Parker Archimedean spiral magnetic field. The Lagrangian map is used to obtain a class of solutions for incompressible MHD. The Aharonov-Bohm interpretation of magnetic helicity and cross helicity is discussed. In closing, examples of magnetosonic N-waves are used to illustrate the role of the wave number and group velocity concepts for MHD waves. This self-contained and pedagogical guide to the fundamentals will benefit postgraduate-level newcomers and seasoned researchers alike.

With This Ring is a Bible study for couples, classes, and counselors who are exploring the Biblical teachings about marriage. Many of the passages studied are familiar, but the perspective and emphasis is uniquely designed to cause serious reflection on the changes needed for our marriages to grow stronger and more pleasing to the Lord.

Many Christians secretly battle powerful, deadly spiritual forces -- often without realizing the source or the solution to the misery they have endured all too long. Are you one of those? Free Indeed is a devotional workbook for those believers who are struggling with destructive, "besetting" sins. Each daily reading calls attention to a specific principle that leads a disciple of the Lord into the freedom that only the Son can give. The daily format includes a brief Scripture passage, reflections, and a sample prayer to express the heart of the liberating truth focus for the day. The author himself has experienced how the truth of God's Word brought salvation and deliverance during the time when he was addicted to drugs, fascinated with the occult, and obsessed with suicidal thoughts. You too can be transformed by the truth of Scripture and receive the joyous freedom of the Lord.

This is the story of Keith Stanworth, a man who was shaped by his mother and father, the land he grew up on, the people around him, and the faith he was taught. More than that, it is the story of a man who took full responsibility for what he became-for good or bad. When he was a young man, his teachers, coaches, and leaders influenced him greatly. He wanted the chance to use his love of sports to help others shape their lives and so decided to become a coach, focusing his abilities and dedication on shaping young people. He was raised in the outdoors and couldn't have imagined a career without time on a mountain-a fact that led him to his home with the Forest Service. In both careers, he had some of the most wonderful-and frightening-experiences of his life. This memoir shares the story of the life of Keith Stanworth. Sometimes people see the same things differently, but this is the way he saw it.