A dynamic programming analysis of multiple guidance corrections of a trajectory /revision no. 1/

Dynamic programming applied to guidance correction for perturbed trajectory of spacecraf

On the identification of observable orbit parameters, with application to lunar orbiter tracking

Linear parameter combinations for lunar orbit determinatio

A technique for optimum final value control of powered flight trajectories /revision no. 1/

Least squares optimum final value control method for determining steering angle program of rocket vehicle until thrust terminatio

On the table of marks of a direct product of finite groups

We present a method for computing the table of marks of a direct product of finite groups. In contrast to the character table of a direct product of two finite groups, its table of marks is not simply the Kronecker product of the tables of marks of the two groups. Based on a decomposition of the inclusion order on the subgroup lattice of a direct product as a relation product of three smaller partial orders, we describe the table of marks of the direct product essentially as a matrix product of three class incidence matrices. Each of these matrices is in turn described as a sparse block diagonal matrix. As an application, we use a variant of this matrix product to construct a ghost ring and a mark homomorphism for the rational double Burnside algebra of the symmetric group S_3

España. Carreteras. 1885

Copia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-201

A tentative 4- isomeric state in Sr-98

Annual Report 2001, Institut fuer Kernchemie, Johannes-Gutenberg-Universitaet, Mainz, GermanyComment: 3 pages, 1 figur

Effects of Diethylstilbestrol on Reproduction in the Black-Tailed Prairie Dog

Research was conducted in southwestern South Dakota in 1970 and 1971 to obtain information on the reproductive cycle of the black-tailed prairie dog (Cynomys ludovicianus) and to test effectiveness of diethylstilbestrol as a reproductive inhibitor. Embryo body lengths from 10 pregnant females were compared to body lengths of 14 known day-old young to learn the peak breeding period when an estrogenic chemosterilant would be most effective. Conception dates were obtained for three females by backdating the gestation period. The breeding peak was found to occur in late February and early March in South Dakota. Nine of 11 Prairie dogs were an important segment of the breeding population. No successful breeding occurred among 13 pairs of captive prairie dogs, however, five females treated with 100 mg DES over a 6-week period showed anatomical and physiological differences from the eight control females. Weight losses among treated females were significantly different (p\u3c0.01) from untreated animals held in cages. No significant weight differences were detected between females collected from DES-treated and untreated towns. Sixty-three females were collected from experimental prairie dog towns. Nine of 31 (29 percent) females from DES-treated towns were pregnant while 27 of 32 females (84 percent) from untreated towns were pregnant. This difference was significant (P\u3c0.01). Differences were significant between both live embryo (p\u3c0.01) and total embryo counts (P\u3c0.05) from treated and untreated females. Age ratio counts showed significantly fewer young per adult (P\u3c0.05) on treated portions of two divided towns, but counts were not significantly different (P\u3e0.05) when two treated towns were compared to a control town