Study for the indicial load effects on multistage space vehicle systems. volume iii- a description of the computer programs employed annual summary report, 21 jun. 1963 - 20 aug. 1964

Documentation of computer programs used to study load effects on multistage space vehicle system

Tensile testing apparatus

An improved mechanical extensometer is described for use with a constant load creep test machine. The dead weight of the extensometer is counterbalanced by two pairs of weights connected through a pulley system and to rod extension and leading into the furnace where the test sample is undergoing elevated temperature (above 500 F.) tensile testing. Novel gripper surfaces, conical tip and flat surface are provided in each sampling engaging platens to reduce the grip pressure normally required for attachment of the extensometer to the specimen and reduce initial specimen bending normally associated with foil-gage metal testing

Study of indicial aerodynamic forces of multistage space vehicle systems. Volume 1 - Application of theory to basic geometries and to the Saturn 5 Final report, 28 Jun. 1967 - 27 Sep. 1968

Potential theory for determining aerodynamic forces of axisymmetric vehicles and Saturn

Effects and importance of penetration and growth of lift on space vehicle response

Wind induced aerodynamic response of Saturn C-5 launch vehicle without fin

Group theory in cryptography

This paper is a guide for the pure mathematician who would like to know more about cryptography based on group theory. The paper gives a brief overview of the subject, and provides pointers to good textbooks, key research papers and recent survey papers in the area.Comment: 25 pages References updated, and a few extra references added. Minor typographical changes. To appear in Proceedings of Groups St Andrews 2009 in Bath, U

Cryptanalysis of three matrix-based key establishment protocols

We cryptanalyse a matrix-based key transport protocol due to Baumslag, Camps, Fine, Rosenberger and Xu from 2006. We also cryptanalyse two recently proposed matrix-based key agreement protocols, due to Habeeb, Kahrobaei and Shpilrain, and due to Romanczuk and Ustimenko.Comment: 9 page

Stress corrosion cracking of titanium alloys: SCC velocity: concentration of TiCl3

Stress corrosion cracking of titanium alloys, velocity of cracking in aqueous and methanol solutions and halogenated organic solvents, concentration of TiCl3 in crack