Structures In Space

xiv aggregates: this touches on the very nature of things. The concept of statistical symmetry which Loeb develops is particularly important, it emphasizes the limitations in seemingly random aggregates and for permits general statements of which the crystallographer's sym metries are only special cases. The reductionist and holistic approaches to the world have been at war with each other since the times of the Greek philosophers and before. In nature, parts clearly do fit together into real structures, and the parts are affected by their environment. The problem is one of understanding. The mystery that remains lies largely in the nature of structural hierarchy, for the human mind can examine nature on many different scales sequentially but not simultaneously. Arthur Loeb's monograph is a fundamental one, but one can sense a devel opment from the relations between his zero-and three-dimensional cells to the far more complex world of organisms and concepts. It is structure that makes the difference between a cornfield and a cake, between an aggregate of cells and a human being, between a random group of human beings and a society. We can perceive anything only when we perceive its structure, and we think by structural analogy and comparison. Several books have been published showing the beauty of form in nature. This one has the beauty of a work of art, but it grows out of rigorous mathematics and from the simplest of bases-dimensional ity, extent and valency.

A space frame is a three-dimensional framework for enclosing spaces in which all members are interconnected and act as a single entity. A benefit of this type of structure is that very large spaces can be covered, uninterrupted by support from the ground. John Chilton's book provides an up-to-date assessment of the use of space grid structures in buildings by reviewing methods of construction, various systems available and detailed studies of the use of space grids in modern buildings. The technical level is aimed at professional and student architects and engineers worldwide and it also serves as a useful construction manual. John Chilton is an engineer, currently teaching architectural students at Nottingham University where he is a senior lecturer. He has also undertaken considerable research in this field.

Much is yet to be discovered about the fascinating large-scale structures of the universe. Bernard Abrams, former Director of the Deep-Sky section of the British Astronomical Association and Michael Stecker, a celebrated California-based astronomical photographer, explain what we currently know of the near and far universe and present some of the most spectacular astronomical photographs ever taken. The accompanying CD-ROM offers a veritable explosion of hundreds of beautiful color images that illustrate local and distant structures and galaxies.

Investigations in space have been conducted in both manned and unmanned space vehicles. Space: Technologies, Materials and Structures explains the development of hardware and instrumentation designed to operate in the severe conditions of space. For the operation and repair of such vehicles, engineers and scientists must consider a broad range of practical issues, such as the construction and mounting of extended large structures, discussed here using the Mir space station as a case study. Another consideration is the manufacture of permanent joins by welding and brazing, as well as the application of various coatings by thermal evaporation. Astrophysicists, engineers and applied mathematicians will benefit from this volume.

These Proceedings are based on the Fifth International Conference on Space Structures, organised by the University of Surrey. Produced as a 2-volume set, they contain original and innovative information on space structures from leading engineers and architects from around the world.