Ocean harvests have plateaued worldwide and many important commercial stocks have been depleted. This has caused great concern among scientists, fishery managers, the fishing community, and the public. This book evaluates the major models used for estimating the size and structure of marine fish populations (stock assessments) and changes in populations over time. It demonstrates how problems that may occur in fisheries dataâ€"for example underreporting or changes in the likelihood that fish can be caught with a given type of gearâ€"can seriously degrade the quality of stock assessments. The volume makes recommendations for means to improve stock assessments and their use in fishery management.

This book presents the life and personality, the scientific and philosophical work of Ludwig Boltzmann, one of the great scientists who marked the passage from 19th- to 20th-Century physics. His rich and tragic life, ending by suicide at the age of 62, is described in detail. A substantial part of the book is devoted to discussing his scientific and philosophical ideas and placing them in the context of the second half of the 19th century. The fact that Boltzmann was the man who did most to establish that there is a microscopic, atomic structure underlying macroscopic bodies is documented, as is Boltzmann's influence on modern physics, especially through the work of Planck on light quanta and of Einstein on Brownian motion. Boltzmann was the centre of a scientific upheaval, and he has been proved right on many crucial issues. He anticipated Kuhn's theory of scientific revolutions and proposed a theory of knowledge based on Darwin. His basic results, when properly understood, can also be stated as mathematical theorems. Some of these have been proved: others are still at the level of likely but unproven conjectures. The main text of this biography is written almost entirely without equations. Mathematical appendices deepen knowledge of some technical aspects of the subject.

A full and exciting account of the Zeebrugge raid, on St. George's Day, April 23rd, 1918, in which the author won the VC - one of eight won in the raid. The raid, one of the Great War's most daring naval exploits, was designed to close off the German-occupied Belgian port of Zeebrugge, a principal base for the U-boat packs that were preying on British shipping. The brainchild of Admiral Sir Roger Keyes, the raid followed months of meticulous planning, which, together with two abortive early attempts, are detailed in the first part of Carpenter's book. The second part of the book deals with the raid itself and the famous fight for possession of the mole controlling Zeebrugge harbour by troops landed from the cruiser HMS Vindictive. The book details the disappointing results of the smokescreen laid down to campouflage the raid and the successful sinking of the three concrete-filled British blockships, Thetis, Intrepid and Iphignia in the Zeebrugge harbour channel, and makes high claims for both the material and morale results of the raid, which cost 500 British casualties, including around 200 dead. The morale lift to allied spirits of the bold attack, coming at the height of the German Spring offensives in 1918, were probably more important than in achieving its desired results. The book is accompanied by forewords from Admirals Beatty and Sims, and by Marshal Foch, supreme Allied Generalissimo in 1918. It is accompanied by five dramatic drawings of the raid by the artist Charles De Lacey, and by some forty photographs, including 'before and after' reconnaissance aerial shots of the damage done, and eight charts, maps and plans of Zeebrugge port and its environs. Also accompanied by an appendix listing the ships and forces involved in the raid, and by an index.

High speed catamaran and multihull high speed marine vessel have become very popular in the last two decades. The catamaran has become the vessel of choice for the majority of high speed ferry operators worldwide. There have been significant advances in structural materials, and structural design has been combined with higher power density and fuel efficient engines to deliver ferries of increasing size. The multihull has proven itself to be a suitable configuration for active power projection across oceans as well as for coastal patrol and protection, operating at high speedd for insertion or retrieval with a low energy capability. At present there is no easily accessible material covering the combination of hydrodynamics, aerodynamics, and design issues including structures, powering and propulsion for these vehicles. Coverage in High Speed Catamarans and Multihulls includes an introduction to the history, evolution, and development of catamarans, followed by a theoretical calculation of wave resistance in shallow and deep water, as well as the drag components of the multihull. A discussion of vessel concept design describing design characteristics, empirical regression for determination of principal dimensions in preliminary design, general arrangement, and methods is also included. The book concludes with a discussion of experimental future vehicles currently in development including the small waterplane twin hull vessels, wave piercing catamarans, planing catamarans, tunnel planing catamarans and other multihull vessels.