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The introduction of chain saws and tractors in the early 1950's marked the beginning of a change in tree harvesting techniques from the old manual methods to mechanized operations. It was followed by a rapid evolution both technically and systematically. Hence, the requirements for improved know- ledge of operational efficiency also increased. Changing relations between Man, machines and environment brought about new experiences and awareness of a physiological and ergonomic nature. Improved knowledge of both machine technology and planning of work on a small or large scale has grown increa- singly important for an efficient utilization of expensive machines and other equipment. The need for a textbook on tree harvesting techniques including expe- riences made in recent years is enhanced. The book presented here is prima- rily based on lectures given on the subject of Forest Techniques at the Faculty of Forestry at the Swedish University of Agricultural Sciences and after modifications also at the University of Nairobi (Kenya). Thus, the book is written primarily for students at the faculties and institutes of forestry. However, it is also useful for persons actively occupied in forest operations. The presentation of this book in its original Swedish version in 1972 created a considerable interest in the preparation of a condensed edition in English. Thus interest has been expressed in Finland, Norway, Holland, Canada, U.S.A., Brazil, Japan, Poland, Scotland and Yugoslavia.
For several decades the electron microscope has been the instrument of choice for the examination of biological structures at high resolution. Biologists have be- come familiar with the techniques and pitfalls of sample preparation and with the interpretation of the images obtained. The purpose of this book is to introduce the biologist to a number of new imaging techniques that are now becoming avail- able to supplement and even extend the information that can be obtained from the now-traditional electron microscope. Some of these techniques are still at the experimental stage, while others, such as cryoelectron microscopy and confocal optical microscopy, are at advanced stages of development and are already avail- able commercially. This book represents a first attempt to quantify the progress made by bring- ing together, in one volume, an account of the technical bases and the future potentials of the various techniques. Although the content is primarily aimed at biologists, microscopists in other fields should also find the information of interest and use. All the chapters are written by leading experts who are at the forefront of these exciting developments. About half the book is concerned with x-ray microscopy; the editors make no apology for this since they are both intimately involved with developments associated with this field and therefore view it, perhaps with bias, as being of the utmost importance.
Techniques in Ophthalmic Plastic Surgery is a richly illustrated, step-by-step guide to oculoplastic surgery, covering everything from the basics to the most recent advances. Jeffrey A. Nerad, MD provides a personal tutorial approach detailing both procedural and management aspects of practice. Along with the latest in cosmetic procedures and detailed photographs and surgical line drawings-most of which are in full color-you'll get a DVD with narrated procedural video clips that demonstrate techniques from the book. This is the essential text for those learning oculoplastic surgery and will bring even the most experienced practitioner up to date with current practice and procedures. Develop a strong foundation in this complex field and apply surgical techniques to frequently encountered abnormalities and aesthetic facial enhancement. Keep this outstanding text close by for a fast, practical, and authoritative reference.
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