Sonic/phononic crystals termed acoustic/sonic band gap media are elastic analogues of photonic crystals and have also recently received renewed attention in many acoustic applications. Photonic crystals have a periodic dielectric modulation with a spatial scale on the order of the optical wavelength. The design and optimization of photonic crystals can be utilized in many applications by combining factors related to the combinations of intermixing materials, lattice symmetry, lattice constant, filling factor, shape of the scattering object, and thickness of a structural layer. Through the publications and discussions of the research on sonic/phononic crystals, researchers can obtain effective and valuable results and improve their future development in related fields. Devices based on these crystals can be utilized in mechanical and physical applications and can also be designed for novel applications as based on the investigations in this Special Issue.

Discover how to use the power of crystals to develop a better understanding of yourself and your relationships, your potential, and your future. The Crystal Decoder focuses on 45 crystals and explores their history, spiritual and healing properties. Included are rituals and spells for using crystals and two detachable divinatory boards upon which you can cast your crystals and divine your future.

This book presents recent advances and trends in photonic crystal technology, making it a useful resource for students, researchers, and faculty in the field. It consists of five chapters that present in-depth knowledge of numerical methods and different applications of photonic crystal technology. The chapters discuss photonic crystals for energy, sensing, and digital devices. They also examine advanced applications of photonic crystals, like holography and photonic spin hall effect. Each chapter presents a detailed background on the considered application, recent work in the area, possible solutions to challenges, and future aspects.

Electronic Circuits covers all important aspects and applications of modern analog and digital circuit design. The basics, such as analog and digital circuits, on operational amplifiers, combinatorial and sequential logic and memories, are treated in Part I, while Part II deals with applications. Each chapter offers solutions that enable the reader to understand ready-made circuits or to proceed quickly from an idea to a working circuit, and always illustrated by an example. Analog applications cover such topics as analog computing circuits. The digital sections deal with AD and DA conversion, digital computing circuits, microprocessors and digital filters. This editions contains the basic electronics for mobile communications. The accompanying CD-ROM contains PSPICE software, an analog-circuit-simulation package, plus simulation examples and model libraries related to the book topics.

The ultimate handbook on the use of crystals for healing, with expert guidance on how to achieve results – this is a great addition to every crystal enthusiast’s library and a must-have for beginners. Crystals have been used as a complementary therapy to combat both physical and emotional ailments for centuries; their unique vibrational resonances able to restore balance to the body’s energy systems and enhance spiritual, mental and physical wellbeing. Alongside guidance on the most important crystals to use for specific illnesses and situations, whether it be insomnia, migraines, depression or the upheaval of moving house, crystal therapy experts Simon and Sue Lilly provide practical tips on how to use these precious stones to restore overall health and further spiritual development. Using clear, step-by-step instructions, The Practical Guide to Crystal Healing will teach you how to use crystals to: • heal the body • balance the mind • cope with change • feed the spirit • and live in harmony. Packed with tried-and-tested layouts for healing, guided visualizations and meditations, and an illustrated repertory of key crystals, this is an essential book for beginners and experienced crystal healers alike.