On the design of an adjustable high precision latching hinge

The design and test details of a high precision hinge and locking mechanism created principally in support of the Lockheed space deployable Flexrib Parabolic Antenna concept are presented. These developed improvements in the detail design of ultra-precise rib hinge and contour adjustment mechanisms will allow radio frequency antenna reflectors to expand into the 15-50 meter diameter size class and to support the .013 mm. deployment repeatability tolerance required to support the 12+ GHz frequency range

Test results of the Chrysler upgraded automotive gas turbine engine: Initial design

The upgraded engine as built to the original design was deficient in power and had excessive specific fuel consumption. A high instrumented version of the engine was tested to identify the sources of the engine problems. Analysis of the data shows the major problems to be low compressor and power turbine efficiency and excessive interstage duct losses. In addition, high HC and CO emission were measured at idle, and high NOx emissions at high energy speeds

What risk factors contribute to C difficile diarrhea?

Certain antibiotics and using 3 or more antibiotics at one time are associated with Clostridium difficile-associated diarrhea (CDAD) (strength of recommendation [SOR]: B, 1 heterogeneous systematic review and several good-quality cohort studies). Hospital risk factors include proximity to other patients with C difficile and longer length of stay (SOR: B, several good-quality cohort studies). Patient risk factors include advanced age and comorbid conditions (SOR: B, several good-quality cohort studies). Acid suppression medication is also a risk factor for CDAD (SOR: B, 1 heterogeneous systematic review and 2 good-quality cohort studies)

Developing Teacher Literacy in Appalachian Contexts: Or How I Went South and Learned a New Way of Being in the World

To become literate when we move from one part of the country to another with significant cultural differences, our first task is to learn the new culture so we can more effectively work with our colleagues and our students. When I moved from Bay City, MI, to Morehead, KY, there were many customs I needed to learn. Fortunately, what I learned helped me to cherish both my new colleagues and students

The Monotypic North American Subgenus Larandrena of Andrena (\u3ci\u3eHymenoptera: Apoidea\u3c/i\u3e)

Larandrena contains a single species, A. miserabilis Cresson. This small, common Andrena is found throughout most of the United States and southern Canada in the spring. The subgeneric position, nomenclature, redescription. variation, notes on the biology, parasites, range, seasonal activity and plant host records are included. A. rniserabilis is thought to be an important pollinator of fruit trees