Voltage dropout sensor Patent

Device for monitoring voltage by generating signal when voltages drop below predetermined valu

Peer-Led Team Learning in Introductory Biology and Chemistry Courses: A Parallel Approach

Peer-Led Team Learning has been in use in Introductory Biology and Introductory Chemistry since Fall 1999 at the University of Portland. lts effect on improved conceptual understanding, retention of students, and improvement in study skills will be discussed. An ancillary, but no less important benefit in the development of interest in science teaching among the peer leaders, is also addressed

The sixteen to forty micron spectroscopy from the NASA Lear jet

Two cryogenically cooled infrared grating spectrometers were designed, fabricated and used on the NASA Lear Jet Observatory. The first spectrometer was used to measure continuum sources such as dust in H II regions, the galactic center and the thermal emission from Mars, Jupiter, Saturn, and Venus over the 16 to 40 micron spectral range. The second spectrometer had higher resolution and was used to measure ionic spectral lines in H II regions (S III at 18.7 microns). It was later used extensively on NASA C-141 Observatory to make observations of numerous objects including H II regions, planetary nebulae, stars with circumstellar shells, the galactic center and extragalactic objects. The spectrometers are described including the major innovations and a list of the scientific contributions

COMMODITY PROBLEMS AND PROGRAM CHOICES: WHEAT, FEED GRAINS, AND SOYBEANS

Agricultural and Food Policy,

A REVIEW OF COMPARATIVE ADVANTAGE

Agribusiness,

FOREIGN AGRICULTURAL ASSISTANCE: ALLY OR ADVERSARY

International Relations/Trade,