Ejector nozzle with massive blowing

Jet-flap, wing-blowing system for use in short takeoff and landing aircraft is described. System depends on ejector nozzle with large blowing capacity to direct ducted air against deflected flap. Operation of equipment during takeoff and cruise conditions is discussed. Diagrams of equipment are provided

Laterally stacked Schottky diodes for infrared sensor applications

Laterally stacked Schottky diodes for infrared sensor applications are fabricated utilizing porous silicon having pores. A Schottky metal contract is formed in the pores, such as by electroplating. The sensors may be integrated with silicon circuits on the same chip with a high quantum efficiency, which is ideal for IR focal plane array applications due to uniformity and reproducibility

Critical Voices: Reinterpreting American History at the Eiteljorg Museum

The complexity of the relationship between Native Americans and Western Americans is reflected in the visual culture of both societies, and in how it is displayed within the context of museums. The Eiteljorg Museum of American Indians and Western Art is unique because it contains collections from both of these societies. It can be argued that displaying art from both societies in the same space only contributes to the colonial mindset because the voices of the Native Americans will be drowned out by the more dominant voices of the white settlers. I argue that the way that the Eiteljorg Museum presents their galleries and utilizes educational programming is beneficial in teaching all of the diverse perspectives of the American West. These diverse perspectives are too often excluded from history teaching requirements, which is why the Eiteljorg Museum serves as an excellent tool to teach the true stories of the American West through art and hands on learning. --Provided by the author

Balloon infrared astronomy platform (BIRAP)

The development of a balloon-borne attitude control system for infrared astronomy studies is discussed. The Balloon Infrared Astronomy Platform (BIRAP) is the result of the development effort. The BIRAP uses electronic gimballing for the offset pointing which eliminates a set of mechanical gimbals. Guide stars with visual magnitudes as low as plus 6 are used for fine tracking assuring that all areas of the sky can be covered. The BIRAP control concept uses a closed loop system in the airborne equipment with automatic update through a command link that can be operated either manually or automatically by a ground based computer

Fabrication of nanometer single crystal metallic CoSi2 structures on Si

Amorphous Co:Si (1:2 ratio) films are electron gun-evaporated on clean Si(111), such as in a molecular beam epitaxy system. These layers are then crystallized selectively with a focused electron beam to form very small crystalline Co/Si2 regions in an amorphous matrix. Finally, the amorphous regions are etched away selectively using plasma or chemical techniques

Access to Hospice Care: Expanding Boundaries, Overcoming Barriers

This report looks at issues of social justice, access, and public policy in hospice and palliative care. As it examines the issues from the perspectives of social justice and fairness, it also recommends ways in which the definition of hospice can be expanded to include more Americans for a longer period of time than simply the days or months shortly before death

Heterologous prion-forming proteins interact to cross-seed aggregation in Saccharomyces cerevisiae

AbstractThe early stages of protein misfolding remain incompletely understood, as most mammalian proteinopathies are only detected after irreversible protein aggregates have formed. Cross-seeding, where one aggregated protein templates the misfolding of a heterologous protein, is one mechanism proposed to stimulate protein aggregation and facilitate disease pathogenesis. Here, we demonstrate the existence of cross-seeding as a crucial step in the formation of the yeast prion [PSI+], formed by the translation termination factor Sup35. We provide evidence for the genetic and physical interaction of the prion protein Rnq1 with Sup35 as a predominant mechanism leading to self-propagating Sup35 aggregation. We identify interacting sites within Rnq1 and Sup35 and determine the effects of breaking and restoring a crucial interaction. Altogether, our results demonstrate that single-residue disruption can drastically reduce the effects of cross-seeding, a finding that has important implications for human protein misfolding disorders.</jats:p

THE LOW-INCOME FARM PROBLEM

Agricultural and Food Policy,

Experimental investigation of crossflow jet mixing in a rectangular duct

An experimental investigation of the mixing of nonreacting opposed rows of jets injected normal to a confined rectangular crossflow has been conducted. Planar Mie-scattering was used to measure the time-average concentration distribution of the jet fluid in planes perpendicular to the duct axis. The mixing effectiveness of round orifice injectors was measured as a function of orifice spacing and orifice diameter. Mixing effectiveness was determined using a spatial unmixedness parameter based on the variance of mean jet concentration distributions. Optimum mixing was obtained when the spacing-to-duct height ratio was inversely proportional to the square root of the jet-to-mainstream momentum-flux ratio. For opposed rows of round holes with centerlines inline, mixing was similar for blockages up to 75 percent. Lower levels of unmixedness were obtained as a function of downstream location when axial injection length was minimized. Mixing may be enhanced if orifice centerlines of opposed rows are staggered, but note that blockage must be less than 50 percent for this configuration