In 1984 physicists discovered a monster in the world of crystallography, a structure that appeared to contain five-fold symmetry axes, which cannot exist in strictly periodic structures. Such quasi-periodic structures became known as quasicrystals. A previously formulated theory in terms of higher dimensional space groups was applied to them and new alloy phases were prepared which exhibited the properties expected from this model more closely. Thus many of the early controversies were dissolved. In 2011, the Nobel Prize for Chemistry was awarded to Dan Shechtman for the discovery of quasicrystals. This primer provides a descriptive approach to the subject for those coming to it for the first time. The various practical, experimental, and theoretical topics are dealt with in an accessible style. The book is completed by problem sets and there is a computer program that generates a Penrose lattice.
ABSTRACT The study of the Comma Johanneum came to me early in my academic development, Where I was exposed to very different opinions on 1 John 5 in particular reading about the impact of verses 6 to 8 in various languages including English, German, and due to lack of further study, Greek and Latin. As middle age is past and my comfort in life was decreasing, I decided to try to write a study paper on it. After 6 years of study, writing, and re-writing this study, this is the end-result that leads the reader through several aspects of the “Comma”, for and against, with a comparison at the end. Both views on the “Comma” have been addressed, both from those who are for the legitimate inclusion in the Word of God and those from those who do not agree with the former. I invite and challenge the reader to look at both sides of the argument and judge my paper accordingly. Discussions with my educated friends went far beyond what I knew and believed at the start. I have attempted to keep the language un-complicated, and I have been told that it is suitable for students and scholars alike. Interested lay people are also invited to study this part of our Christian heritage.
Reprint of the original, first published in 1859. The publishing house Anatiposi publishes historical books as reprints. Due to their age, these books may have missing pages or inferior quality. Our aim is to preserve these books and make them available to the public so that they do not get lost.
In 1984 physicists discovered a monster in the world of crystallography, a structure that appeared to contain five-fold symmetry axes, which cannot exist in strictly periodic structures. Such quasi-periodic structures became known as quasicrystals. A previously formulated theory in terms of higher dimensional space groups was applied to them and new alloy phases were prepared which exhibited the properties expected from this model more closely. Thus many of the early controversies were dissolved. In 2011, the Nobel Prize for Chemistry was awarded to Dan Shechtman for the discovery of quasicrystals. This primer provides a descriptive approach to the subject for those coming to it for the first time. The various practical, experimental, and theoretical topics are dealt with in an accessible style. The book is completed by problem sets and there is a computer program that generates a Penrose lattice.
A mix of Tony Hawk and Brian Welch comes together in skateboarding legend Christian Hosoi, who reveals everything about his rise, fall, and redemption, in this amazing tell-all—from being named the greatest skater of all time to bottoming out on drugs to finally finding redemption through God. Fans of Slater Kelly’s Pipe Dreams and Brian Welch’s Save Me From Myself, and followers of Tony Alva, Jay Adams, and Steve Caballero, will be captivated by this extraordinary, star-studded story, a gripping read that ranges from the heart of the 1980s skateboarding scene to the inside of a prison, from Hollywood parties to intense prayer sessions. Hosoi: My Life as a Skateboarder Junkie Inmate Pastor takes readers to the heart of one little-known world after another—and he portrays them in all their gore and glory for all the world to see.
Crystals are everywhere, from natural crystals (minerals) through the semiconductors and magnetic materials in electronic devices and computers or piezoelectric resonators at the heart of our quartz watches to electro-optical devices. Understanding them in depth is essential both for pure research and for their applications. This book provides a clear, thorough presentation of their symmetry, both at the microscopic space-group level and the macroscopic point-group level. The implications of the symmetry of crystals for their physical properties are then presented, together with their mathematical description in terms of tensors. The conditions on the symmetry of a crystal for a given property to exist then become clear, as does the symmetry of the property. The geometrical representation of tensor quantities or properties is presented, and its use in determining important relationships emphasized. An original feature of this book is that most chapters include exercises with complete solutions. This allows readers to test and improve their understanding of the material. The intended readership includes undergraduate and graduate students in materials science and materials-related aspects of electrical and optical engineering; researchers involved in the investigation of the physical properties of crystals and the design of applications based on crystal properties such as piezoelectricity, electro-optics, optical activity and all those involved in the characterization of the structural properties of materials.
This work is a classic reference text for metallurgists, material scientists and crystallographers. The first edition was published in 1965. The first part of that edition was revised and re-published in 1975 and again in 1981. The present two-part set represents the eagerly awaited full revision by the author of his seminal work, now published as Parts I and II. Professor Christian was one of the founding fathers of materials science and highly respected worldwide. The new edition of his book deserves a place on the bookshelf of every materials science and engineering department. Suitable thermal and mechanical treatments will produce extensive rearrangements of the atoms in metals and alloys, and corresponding marked variations in physical and chemical properties. This book describes how such changes in the atomic configuration are effected, and discusses the associated kinetic and crystallographic features. It deals with areas such as lattice geometry, point defects, dislocations, stacking faults, grain and interphase boundaries, solid solutions, diffusion, etc. The first part covers the general theory while the second part is concerned with descriptions of specific types of transformations.
The most comprehensive guide to the botany, history, distribution, and cultivation of all known psychoactive plants • Examines 414 psychoactive plants and related substances • Explores how using psychoactive plants in a culturally sanctioned context can produce important insights into the nature of reality • Contains 797 color photographs and 645 black-and-white illustrations In the traditions of every culture, plants have been highly valued for their nourishing, healing, and transformative properties. The most powerful plants--those known to transport the human mind into other dimensions of consciousness--have traditionally been regarded as sacred. In The Encyclopedia of Psychoactive Plants Christian Rätsch details the botany, history, distribution, cultivation, and preparation and dosage of more than 400 psychoactive plants. He discusses their ritual and medicinal usage, cultural artifacts made from these plants, and works of art that either represent or have been inspired by them. The author begins with 168 of the most well-known psychoactives--such as cannabis, datura, and papaver--then presents 133 lesser known substances as well as additional plants known as “legal highs,” plants known only from mythological contexts and literature, and plant products that include substances such as ayahuasca, incense, and soma. The text is lavishly illustrated with 797 color photographs--many of which are from the author’s extensive fieldwork around the world--showing the people, ceremonies, and art related to the ritual use of the world’s sacred psychoactives.
Designed for practitioners of organic synthesis, this book helps chemists understand and take advantage of rearrangement reactions to enhance the synthesis of useful chemical compounds. Provides ready access to the genesis, mechanisms, and synthetic utility of rearrangement reactions Emphasizes strategic synthetic planning and implementation Covers 20 different rearrangement reactions Includes applications for synthesizing compounds useful as natural products, medicinal compounds, functional materials, and physical organic chemistry
The Académie Royale de Peinture et de Sculpture (French Academy of Painting and Sculpture)—perhaps the single most influential art institution in history—governed the arts in France for more than 150 years, from its founding in 1648 until its abolition in 1793. Christian Michel's sweeping study presents an authoritative, in-depth analysis of the Académie’s history and legacy. The Académie Royale assembled nearly all of the important French artists working at the time, maintained a virtual monopoly on teaching and exhibitions, enjoyed a priority in obtaining royal commissions, and deeply influenced the artistic landscape in France. Yet the institution remains little understood today: all commentary on it, during its existence and since its abolition, is based on prejudices, both favorable and critical, that have shaped the way the institution has been appraised. This book takes a different approach. Rather than judging the Académie Royale, Michel unravels existing critical discourse to consider the nuances and complexities of the academy’s history, reexamining its goals, the shifting power dynamics both within the institution and in the larger political landscape, and its relationship with other French academies and guilds.
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