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Verlag: Classic Comic Store Ltd.
This novel depicts the romantic but inevitably sad life of Breton fishermen who sail each summer season to the stormy Iceland cod grounds.
This book includes my lecture notes for electrical machines course. The book is divided to different learning partsPart 1- Apply basic physical concepts to explain the operation and solve problems related to electrical machines.Part 2- Explain the principles underlying the performance of three-phase electrical machines.Part 3- Analyse, operate and test three-phase induction machines.Part 4- Investigate the performance, design, operation, and testing of the three-phase synchronous machine.Part1: Apply basic physical concepts to explain the operation and solve problems related to electrical machines.Describe the construction of simple magnetic circuits, both with and without an air gap. Explain the basic laws which govern the electrical machine operation, such as Faraday's Law, Ampere-Biot-Savart's Law, and Lenz's Law. Apply Faraday's Law of electromagnetic induction, Ampere-Biot-Savart's Law, and Lenz's Law to solve for induced voltage and currents in relation to simple magnetic circuits with movable parts. Illustrate the principle of the electromechanical energy conversion in magnetic circuits with movable parts.Part 2: Explain the principles underlying the performance of three-phase electrical machines. Compare and contrast concentric and distributed windings in three-phase electrical machines. Identify the advantages of distributed windings applied to three-phase machines. Explain how the pulsating and rotating magnetic fields are produced in distributed windings. Calculate the synchronous speed of a machine based on its number of poles and frequency of the supply. Describe the process of torque production in multi-phase machines.Part 3: Analyse, operate and test three-phase induction machines. Calculate the slip of an induction machine given the operating and synchronous speeds. Calculate and compare between different torques of a three-phase induction machine, such as the locked rotor or starting torque, pull-up torque, breakdown torque, full-load torque or braking torque. Develop and manipulate the equivalent circuit model for the three-phase induction machine. Analyse, and test experimentally, the torque-speed and current-speed characteristics of induction machines. and discuss the effects of varying such motor parameters as rotor resistance, supply voltage and supply frequency on motor torque-speed characteristics. Perform no-load and blocked rotor tests in order to determine the equivalent circuit parameters of an induction machine. Explore various techniques to start an induction motor. Identify the applications of the three-phase induction machines in industry and utility. Classify the insulations implemented in electrical machines windings and identify the factors affecting them. Part4. Investigate the performance, design, operation, and testing of the three-phase synchronous machine. Describe the construction of three-phase synchronous machines, particularly the rotor, stator windings and the rotor saliency. Develop and manipulate an equivalent circuit model for the three-phase synchronous machine. Sketch the phasor diagram of a non-salient poles synchronous machine operating at various modes operation, such as no-load operation, motor operation, and generator operation. Investigate the influence of the rotor saliency on machine performance. Perform open and short circuit tests in order to determine the equivalent circuit parameters of a synchronous machine. Identify the applications of the three-phase synchronous machines in industry and utility List and explain the conditions of parallel operation of a group of synchronous generators. Evaluate the performance of the synchronous condenser and describe the power flow control between a synchronous condenser and the utility in both modes: over and under excited. Explain the principles of controlling the output voltage and frequency of a synchronous generator.Zum Buch
A mind-bending multiverse adventure about theft, family, and finding your home. Twelve-year-old Elsbeth has an extraordinary power: she can travel to parallel worlds and bring objects back with her. But as freak weather events become more frequent and a strange boy, Idris, starts to turn up everywhere she travels, she has to ask herself: does her gift come with a price? Fans of Christopher Edge, Ross Welford and Jessica Townsend will love this fast-paced story and mind-blowing plot! Perfect for readers aged 9 and up.Zum Buch
The seventh book in a thrilling, magical, and action-packed new fantasy series, illustrated throughout and perfect for 7-9 year olds! In the land of Draconis, there are no dragons. Once, there were. Once, humans and dragons were friends, and created the great city of Rivven together. But then came the Dragon Storm, and the dragons retreated from the world of humans. To the men and women of Draconis, they became legends and myth. When dragonseer, Connor, and his dragon, Lightspirit, solve an impossible puzzle, they are taken immediately to the palace. There they meet someone who needs their help to stop the Dragon Storm, and save Draconis from a terrible war! But something isn't adding up ... and not everyone can be trusted. Can Connor and Lightspirit work out who's really behind the Dragon Storm before it's too late? An exciting new fantasy series from the highly acclaimed author of Orion Lost, brilliantly illustrated throughout, and perfect for fans of Beast Quest and Dragon Mountain.Zum Buch
Rubber-band jewellery - the coolest thing around, and so simple to make! Everyone's crazy for rubber-band jewellery! Discover how to make 35 fantastic designs for yourself and your friends. All you need to make basic bracelets are colourful rubber bands, a loom that you can make yourself, a hook and a clip - it's that simple! The patterns in this book show you how to make a whole host of different items that you can customise by choosing your own colourways. Every one of these projects, from a pretty diamond bracelet to a chic pinstripe bracelet, and from a fabulous kaleidoscope bracelet to cute ladybird and bee bracelets, will inspire you to get crafting. Start out with Easy-Peasy Bracelets, and, as your skills improve, try some of the Craftier Bracelets. Then, why not make some Awesome Accessories? You'll find a headband, earrings, keyring, charms and more. It's so easy to create these fun bracelets and accessories. All the projects have clear step-by-step illustrated instructions, so you'll be an expert in no time!Zum Buch
Alvin Calvin did not like eating vegetables, but after the hard work of trying to plant a pizza bush and eventually growing fresh vegetables himself, he accepted the idea of giving them a try.Zum Buch
Second in the Fever Crumb trilogy from the author of Mortal Engines. “Fever herself is a virtuoso character . . . Imaginative, inventive and exciting.” —Kirkus Reviews (starred review) YALSA Best Fiction for Young Adults USBBY Outstanding International Book In a ruined world, Fever seeks the lost secret of flight. Two years ago, Fever Crumb escaped the war-torn city of London in a traveling theater. Now, she arrives in the extraordinary city of Mayda, where buildings ascend the cliffs on funicular rails, and a mysterious recluse is building a machine that can fly. Fever is the engineer he needs—but ruthless enemies will kill to possess their secrets. In this gripping sequel to Fever Crumb, master storyteller Philip Reeve creates a riveting story that is unforgettable and delightful at every fast-paced, breathless turn. “Remarkable storytelling.” —The Horn Book “Reeve’s intricately imagined world, combined with a fast-paced plot, offers a rich, rewarding reading experience.” —School Library JournalZum Buch
