Attitude control system for sounding rockets Patent

Development of attitude control system for sounding rocket stabilization during ballistic phase of fligh

The value of corn, oil meal, cottonseed meal, and gluten feed in work horse rations

These experiments have not been continued long enough with each feed to suggest infallible conclusions. The work has been carried through two years, however, under excellent conditions for accurate work, and there has been in the fundamental effects of the rations a close similarity of results with the different pairs of horses. While the subject merits more extended study, and future work might give somewhat different results, it seems that the results already obtained justify the following conclusions: 1. The health, spirit, and endurance of work horses were the same when fed corn with a moderate amount of oil meal, or gluten feed, or cottonseed meal; as when fed a corn and oats ration supplying a similar nutritive ratio. 2. The ration of corn and oil meal maintained the weight, flesh, and appearance of the horses fully as well and with less expense than the one of similar nutritive value composed of corn and oats

Unified Description of Aging and Rate Effects in Yield of Glassy Solids

The competing effects of slow structural relaxations (aging) and deformation at constant strain rate on the shear yield stress $\tau^y$ of simple model glasses are examined using molecular simulations. At long times, aging leads to a logarithmic increase in density and $\tau^y$. The yield stress also rises logarithmically with rate, but shows a sharp transition in slope at a rate that decreases with increasing age. We present a simple phenomenological model that includes both intrinsic rate dependence and the change in properties with the total age of the system at yield. As predicted by the model, all data for each temperature collapse onto a universal curve.Comment: 4 pages, 3 figure

Effect of many-body interactions on the solid-liquid phase-behavior of charge-stabilized colloidal suspensions

The solid-liquid phase-diagram of charge-stabilized colloidal suspensions is calculated using a technique that combines a continuous Poisson-Boltzmann description for the microscopic electrolyte ions with a molecular-dynamics simulation for the macroionic colloidal spheres. While correlations between the microions are neglected in this approach, many-body interactions between the colloids are fully included. The solid-liquid transition is determined at a high colloid volume fraction where many-body interactions are expected to be strong. With a view to the Derjaguin-Landau-Verwey-Overbeek theory predicting that colloids interact via Yukawa pair-potentials, we compare our results with the phase diagram of a simple Yukawa liquid. Good agreement is found at high salt conditions, while at low ionic strength considerable deviations are observed. By calculating effective colloid-colloid pair-interactions it is demonstrated that these differences are due to many-body interactions. We suggest a density-dependent pair-potential in the form of a truncated Yukawa potential, and show that it offers a considerably improved description of the solid-liquid phase-behavior of concentrated colloidal suspensions

Jamming under tension in polymer crazes

Molecular dynamics simulations are used to study a unique expanded jammed state. Tension transforms many glassy polymers from a dense glass to a network of fibrils and voids called a craze. Entanglements between polymers and interchain friction jam the system after a fixed increase in volume. As in dense jammed systems, the distribution of forces is exponential, but they are tensile rather than compressive. The broad distribution of forces has important implications for fibril breakdown and the ultimate strength of crazes.Comment: 4 pages, 4 figure

Forage crops for swine

The imperative need of green pastures in pork production is emphasized in the results of 3 years’ investigations at the Iowa Agricultural Experiment Station. They show that the profits on forage fed spring pigs can be increased more than five fold over those fed in dry lot. Alfalfa grazed pigs in 1911 returned a profit of more than $3.00 each as compared to 61 cents in dry lot. Profits of from$30.00 to $80.00 an acre, counting corn at 50 cents and hogs at$5.00, have been easily secured with our good forages. An acre of alfalfa in 1911 netted on this basis $65.99; red clover in 1909,$32.34, in 1910, $34.62; rape in 1909,$27.50 and $27.72; in 1910,$37.51, and in 1911, $80.37; sweet clover in 1910,$42.07, 1911, $23.46; a mixture of oats, clover and rape in 1909,$32.30; a mixture of oats, Canadian field peas and rape in 1909, $22.83; in 1911,$39.52, $53.45 and$64.63; and blue grass and timothy in 1909, $15.23

Dynamic sampling schemes for optimal noise learning under multiple nonsmooth constraints

We consider the bilevel optimisation approach proposed by De Los Reyes, Sch\"onlieb (2013) for learning the optimal parameters in a Total Variation (TV) denoising model featuring for multiple noise distributions. In applications, the use of databases (dictionaries) allows an accurate estimation of the parameters, but reflects in high computational costs due to the size of the databases and to the nonsmooth nature of the PDE constraints. To overcome this computational barrier we propose an optimisation algorithm that by sampling dynamically from the set of constraints and using a quasi-Newton method, solves the problem accurately and in an efficient way

Forage crops for hogs

When it is understood that the profits on forage fed spring pigs can be increased more than five fold over those fed in dry lot, the great value of green pastures in pork production becomes clear. In 1911, pigs grazed upon alfalfa at the Iowa Agricultural Experiment station returned a profit of more than $3.00 each, as compared to 61 cents in dry lot. The yearly net profits with spring pigs on an acre of forage at Ames, counting corn at 50 cents a bushel and hogs at$5.00, has ranged with the best forages from $30.00 to$80.00. In 1909, an acre of red clover netted on this basis, $32.34; oats, red clover and rape,$32.30; in 1910, sweet clover, $42.07; rape,$37.57; and red clover, $34.62; in 1911, rape,$80.37; alfalfa, $65.99; and oats, field peas and rape,$64.63. Such profits encourage the growing of hog forages. The average daily profit on young pigs grazing in forage is invariably higher than on those confined to pens

Background modeling for video sequences by stacked denoising autoencoders

Nowadays, the analysis and extraction of relevant information in visual data flows is of paramount importance. These images sequences can last for hours, which implies that the model must adapt to all kinds of circumstances so that the performance of the system does not decay over time. In this paper we propose a methodology for background modeling and foreground detection, whose main characteristic is its robustness against stationary noise. Thus, stacked denoising autoencoders are applied to generate a set of robust characteristics for each region or patch of the image, which will be the input of a probabilistic model to determine if that region is background or foreground. The evaluation of a set of heterogeneous sequences results in that, although our proposal is similar to the classical methods existing in the literature, the inclusion of noise in these sequences causes drastic performance drops in the competing methods, while in our case the performance stays or falls slightly.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech