This book provides a concise but comprehensive introduction to the fundamentals and current state of the art in thermoelectrics. Addressing an audience of materials scientists and engineers, the book covers theory, materials selection, and applications, with a wide variety of case studies reflecting the most up-to-date research approaches from the past decade, from single crystal to polycrystalline form and from bulk to thin films to nano dimensions. The world is facing major challenges for finding alternate energy sources that can satisfy the increasing demand for energy consumption while preserving the environment. The field of thermoelectrics has long been recognized as a potential and ideal source of clean energy. However, the relatively low conversion efficiency of thermoelectric devices has prevented their utility on a large scale. While addressing the need for thermal management in materials, device components, and systems, thermoelectrics provides a fundamental solution to waste heat recovery and temperature control. This book summarizes the global efforts that have been made to enhance the figure of merit of various thermoelectric materials by choosing appropriate processes and their influence on properties and performance. Because of these advances, today, thermoelectric devices are found in mainstream applications such as automobiles and power generators, as opposed to just a few years ago when they could only be used in niche applications such as in aeronautics, infrared imaging, and space. However, the continued gap between fundamental theoretical results and actual experimental data of figure of merit and performance continues to challenge the commercial applications of thermoelectrics. This book presents both recent achievements and continuing challenges, and represents essential reading for researchers working in this area in universities, industry, and national labs.
In the past, many sādhanas were needed to purify the human mind, body and heart: intense study of the Vedas, extreme austerities, and long periods of meditative absorption. Fortunately for us today, it’s different: the easiest and quickest way to purify ourselves is to chant the Name of God given by the satguru. Simply chanting the Divine Name is enough to end all our suffering. On 8 April, 2020, an extraordinary event took place. On this day, Paramahamsa Vishwananda received the mantra, śrī viṭṭhala giridhāri parabrahmaṇe namaḥ, as it was revealed by Bhagavān Himself. This mantra has now become the mūla-mantra, the main mantra, of the Hari Bhakta Sampradāya. For everyone (whether a devotee or follower or simply curious about the bhakti path) who wants to deepen their spiritual experience, this booklet will help provide a more profound understanding about the nature of this Divine Name in the form of this extraordinary mantra. And now, since we have been graced to receive this Name of Śrī Hari, then the only thing that is needed is our willingness to make it part of our lives, and to chant it throughout our day—no matter what we’re doing—with love.
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