Landing impact studies of a 0.3-scale model air cushion landing system for a Navy fighter airplane

An experimental study was conducted in order to determine the landing-impact behavior of a 0.3-scale, dynamically (but not physically) similar model of a high-density Navy fighter equipped with an air cushion landing system. The model was tested over a range of landing contact attitudes at high forward speeds and sink rates on a specialized test fixture at the Langley aircraft landing loads and traction facility. The investigation indicated that vertical acceleration at landing impact was highly dependent on the pitch angle at ground contact, the higher acceleration of approximately 5g occurring near zero body-pitch attitude. A limited number of low-speed taxi tests were made in order to determine model stability characteristics. The model was found to have good pitch-damping characteristics but stability in roll was marginal

Small-scale Minimal-maintenance Anaerobic Digestion of Food Waste for Solids Reduction and Methane Production: Feasibility Study

Six gallons of food waste was anaerobically digested for 76 days in two small-scale digesters sitting by a lab window. The main difference, besides waste sources, of these digesters was substrate processing: chopping versus blending. An effort was made to minimize the maintenance of the digesters, however, after 45 days of overly acidic (p

Review of \u3ci\u3e Ice Age Peoples of North America: Environments, Origins, and Adaptations of the First Americans\u3c/i\u3e Edited by Robson Bonnichsen and Karen L. Turnmire

This collection of nineteen articles presents up-to-date regional or topical syntheses of the best data relating to the last Ice Age inhabitants in Northeast Asia, Beringia, and North America. Many of the papers were given in 1989 at the First World Summit, sponsored by the Center for the Study of the First Americans at the University of Maine. Authors were given the opportunity to update their syntheses to include new finds in their regions during the decade between the Summit and the book\u27s publication, though some contributors waived the opportunity

A comparison of six farrowing house slat materials

There were 410 crossbred Duroc, Hampshire, Landrace and Yorkshire sows and their litters used in this study to compare the self-cleaning properties of six different slat types and to relate slat cleanliness to pig performance. Each litter was raised to weaning (about 5 weeks of age) in a 24-crate environment controlled confinement farrowing house. Each partially slatted farrowing crate utilized one of six different slat types in the rear 30 inches of the crate. The slat materials, #9 expanded metal, Behlen stainless steel, round rods, flat steel, plastic and aluminum, were evaluated for cleanliness by objective numeric scoring of the slatted area at weekly intervals. Slat cleanliness was primarily related to percent void (slot) space in the slat section. Expanded metal, Behlen stainless steel and round rod slats had a greater percent void space and scored significantly cleaner than flat steel, aluminum and plastic slats. The slats constructed of materials more readily available for on-farm construction such as expanded metal, round rods and flat steel self-cleaned more effectively than the specialty slat materials such as stainless steel, plastic and aluminum. The age and number of pigs in the litter had little influence on slat cleanliness. Year and season of year differences affected the cleanliness of all slat types but did not affect the differences among slat types. Slat cleanliness had little influence on the percentage of pigs weaned of those born alive; however, the slat material itself significantly affected the percentage weaned. Expanded metal, round rods, Behlen stainless steel and flat steel slat materials were those associated with the lower weaning percentages of 74.3 and 69.5, respectively. There were no significant differences in adjusted 35-day pig weaning weight

Review of \u3ci\u3e Ice Age Peoples of North America: Environments, Origins, and Adaptations of the First Americans\u3c/i\u3e Edited by Robson Bonnichsen and Karen L. Turnmire

This collection of nineteen articles presents up-to-date regional or topical syntheses of the best data relating to the last Ice Age inhabitants in Northeast Asia, Beringia, and North America. Many of the papers were given in 1989 at the First World Summit, sponsored by the Center for the Study of the First Americans at the University of Maine. Authors were given the opportunity to update their syntheses to include new finds in their regions during the decade between the Summit and the book\u27s publication, though some contributors waived the opportunity

Calopogon pulchellus R. Br.

https://thekeep.eiu.edu/herbarium_specimens_byname/21301/thumbnail.jp

Calopogon pulchellus R. Br.

https://thekeep.eiu.edu/herbarium_specimens_byname/21301/thumbnail.jp

A Fight \u27Till the Death: Congress\u27s Usurpation of State Court Power in End-of-Life Matters

In the spring of 2005, the United States Congress passed An Act for the Relief for the Parents of Theresa Marie Schiavo ( the Act ) in response to numerous requests by Michael Schiavo, Theresa\u27s husband, to have Theresa\u27s feeding tube removed. Michael Schiavo argued that, prior to her accident, Theresa ( Terri ) made oral statements expressing her wish not to be kept alive in a persistent vegetative state. The Act provided a mechanism for the parents of Terri Schiavo to institute legal proceedings to prevent the removal of Terri\u27s feeding tube

Inheritance in a Wheat Cross of Ridit x Utac

Present-day plant breeding, on the foundation made many years ago, has achieved important scientific and economic results. By means of introductions and selections, superior strains such as Turkey and Kanred have been obtained. Through hybridization new combinations of characters result, combining desireable characters of different plant types in a single individual. In this program, wheat hybridization has occupied a worthy place. Each year a numbero f wheat crosses are made at the Utah Experiment Station, the main purpose of which is to develop superior strains of wheat. Such an economic program is aided and hastened by studies in genetic behavior. This paper reports such a genetic study of the inheritance of awns, spike density, and kernel color in a cross between Ridit and Utac wheat varieties