Hyperbola-generator for location of aperiodic events

Plotting device, when used in conjunction with three or more detectors and local receiver and recorder, can quickly pinpoint location of any aperiodic event. Operation requires minimal training and is readily adapted to the field. Mechanical error in device prototype is less than or equal to 3 percent

Modulated infrared radiant source

A modulated, infrared radiant energy source was developed to calibrate an airborne nadir-viewing pressure modulated radiometer to be used to detect from Earth orbit trace gases in the troposphere. The technique used an 8 cm long, 0.005 cm diameter platinum-iridium wire as an isothermal, thin line radiant energy source maintained at 1200 K. A + or - 20 K signal, oscillating at controllable frequencies from dc to 20 Hz, was superimposed on it. This periodic variation of the line source energy was used to verify the pressure modulated radiometer's capability to distinguish between the signal variations caused by the Earth's background surface and the signal from the atmospheric gases of interest

Kinetic simulations of X-B and O-X-B mode conversion

We have performed fully-kinetic simulations of X-B and O-X-B mode conversion in one and two dimensional setups using the PIC code EPOCH. We have recovered the linear dispersion relation for electron Bernstein waves by employing relatively low amplitude incoming waves. The setups presented here can be used to study non-linear regimes of X-B and O-X-B mode conversion.Comment: 4 pages, 3 figure

Relationships between temperament and live animal body composition traits in crossbred stocker steers

Last updated: 6/12/200

Enhancing Science for ELLs: Science strategies for English language learners that benefit all students.

Most of us recall the first time we had English Language Learners (ELLs) in our classrooms. What does this child understand? How do I help her feel comfortable when I can’t communicate in the same language? How do I teach academic subjects and monitor progress when he doesn’t speak the language of instruction? How will her peers act toward her? These concerns are often coupled with a fear that spending valuable instructional time helping the ELLs may cause us to neglect the bulk of our class who are not ELLs