Böcker av Dave West

This book has been the go-to guide on sheep health, disease and production for veterinarians, farmers, farm advisors and veterinary, agricultural and applied science students since it was first published in 1993. Its authors are recognised internationally in the field of sheep health and production and have a lifetime of experience in the New Zealand sheep industry as well as wide exposure to sheep farmers working with practical production and flock health issues. This fourth edition is extensively revised and fully redesigned.

The life of a spider is very confusing. On a cool windy day in May spider found a nice, quiet place to fall asleep. If only he had known it was an old suitcase, packed and ready for a summer vacation. Now he's woken up in a strange place with bright lights, loud noises and tall buildings all around him. Spider is very confused. What is going on and why is he so hungry? He's forgotten how to spin a web (again!). Lucky for him there is a friendly American spider on hand to help him navigate his way through a new country and introduce him to a more modern way of living. Join spider on his big adventure in the U.S. of A., as he makes new friends and discovers how big the world really is. A true hero and (maybe) not so scary after all.

Describes the understanding of the physical processes that combine to produce a photorefractive effect in key, representative composite materials. This book summarizes the model of photorefraction as applied to polymers with high diffraction efficiency. It explores applications that supercede the capabilities of photorefractive crystals.