DDC-IRA ••Analytical Investigation of Combustion Instability in Solid Propellant Rockets" ARPA Order Number 24-61 Project Code Number 9100 Date of Contract: June 23, 1961 Contract Expiration Date; July 31, 1962 Amount of Contract: $7 3, 056 Contract Number: AF 49(638)-1094 Contractor: Armour Research Foundation of Illinois Institute of Technology Project Scientist: Dr. T. Paul Torda CAlumet 5-9...

Measuring the strength of natural selection is tremendously important in evolutionary biology, but remains a challenging task. In this work, we analyse the characteristics of selection for a morphological change (lateral-plate reduction) in the threespine stickleback Gasterosteus aculeatus. Adaptation to freshwater, leading with the reduction or loss of the bony lateral armour, has occurred in ...

During the impact by an armour-piercing projectile against a bilayer ceramic/backing protective system, dynamic tensile stresses are generated leading to inception and propagation of numerous oriented cracks. This intense damage, called fragmentation, affects performances shielding its capacity resist multiple impact. The residual confined strength fragmented ceramic is relatively weak compared...

The cell wall is composed of a polysaccharide-based three-dimensional network. Considered for a long time as an inert exoskeleton, the cell wall is now seen as a dynamic structure that is continuously changing as a result of the modification of culture conditions and environmental stresses. Although the cell wall composition varies among fungal species, chemogenomic comparative analysis have le...

This study focuses on the extensive archaeometallurgical characterization of a suit an exceptional armour belonging to “Musée du Vieux-Château” in Laval (France). Except for helmet, its morphological features correspond rare Italian-style equipment dated from 15thcentury. However, exact origin is unknown. Metallurgical investigations made set samples revealed that was various ferrous alloys, su...

The purpose of this paper is to describe two cases of a hitherto unknown syndrome superficially resembling myotonia. Detailed studies have helped to separate this syndrome of continuous musclefibre activity from a group of 100 myotonic subjects, and it will be referred to in this paper as the 'syndrome of continuous muscle-fibre activity'. This descriptive label has been chosen, though the more...

Historically, the predominant health problem worldwide for ruminant animals has been the presence of internal parasites (Armour, 1980; Borgsteede and Burg, 1982). The continued use of anthelmintics, or dewormers, remains controversial among researchers because there is wide variation among results when these products are used on cattle with moderate to low levels of parasite infestation (Ward e...