Bøger af William Shepherd

Power Converter Circuits reveals all key components of rectification, inversion, cycloconversion, and conversion circuits. It describes switching, voltage, and current relationships, as well as converter properties, operation, control, and performance as utilized in most practical applications. Authored jointly by a veteran scholar and an accomplished researcher in the field, the book highlights methods grounded in classical mathematics and includes an abundance of worked numerical examples. It authoritatively covers AC to DC, DC to AC, AC to AC, and DC to DC converters in a single volume and features hundreds of chapter-specific problems, with solutions provided separately at the end of the book.

'An exciting, highly informative and also enjoyable read: Shepherd writes with clarity and verve. this book should find its way into the hands of all schools, universities and lovers of Herodotus.' - Peter Jones, Classics for AllWeaving together the accounts of the ancient historian Herodotus with other ancient sources, this is the engrossing story of the triumph of Greece over the mighty Persian Empire.The Persian War is the name generally given to the first two decades of the period of conflict between the Greeks and the Persians that began in 499 BC and ended around 450. The pivotal moment came in 479, when a massive Persian invasion force was defeated and driven out of mainland Greece and Europe, never to return. The victory of a few Greek city-states over the world's first superpower was an extraordinary military feat that secured the future of Western civilization. All modern accounts of the war as a whole, and of the best-known battles of Marathon, Thermopylae and Salamis, depend on the ancient sources, foremost amongst them Herodotus. Yet although these modern narratives generally include numerous references to the ancient authors, they quote little directly from them.This is the first book to bring together Herodotus' entire narrative and interweave it with other ancient voices alongside detailed commentary to present and clarify the original texts. The extracts from other ancient writers add value to Herodotus' narrative in various ways: some offer fresh analysis and credible extra detail; some contradict him interestingly; some provide background illumination; and some add drama and colour. All are woven into a compelling narrative tapestry that brings this immense clash of arms vividly to life.'Distinguished military historian of the Persian Wars William Shepherd [...] shows himself to be also a most sensitive interpreter of those Wars' original historian Herodotus. With Shepherd as our guide and Herodotus by our side this key moment in West-East relations is given its full cultural and strategic due.'Paul Cartledge, A.G. Leventis Senior Research Fellow of Clare College, Cambridge

Considers the various options of renewable energy, including water energy, wind energy and biomass, solar thermal and solar photovoltaic energy. This work examines the environmental implications and economic viability of various fossil and renewable sources.

During the Peloponnesian War the Athenians occupied the promontory of Pylos to counter Sparta's repeated invasions of Attica. Over two days of fighting the small garrison beat off the Spartan army and the returning Athenian fleet won a victory in the nearby waters, stranding a contingent of elite Spartan hoplites on the island of Sphacteria.

"Plataea 479 BC: Greece's Greatest Victory".

In 480 BC, the Greek and Persian fleets met in a battle in the strait between Attica and the island of Salamis. Although outnumbered, the Greeks delivered a victory that ended the Persian threat to Greece. This book draws on the findings of archaeological, technological and naval research to recreate an important naval campaigns in world history.

This text reveals all key components of rectification, inversion, cycloconversion, and conversion circuits. It authoritatively describes switching, voltage and current relationships, and converter properties, operation, control, and performance as utilized in most practical applications. Authored jointly by a veteran scholar and an accomplished researcher in the field Power Converter Circuits highlights methods grounded in classical mathematics and includes an abundance of numerical worked examples.Features hundreds of chapter-specific problems, with solutions provided separately at the end of the book