1,724 research outputs found
Helping students learn to spell : a look inside a second grade classroom
Learning how to spell is a complex, developmental process. This research paper describes how second grade students improved their spelling development in the context of daily reading and writing. Realizing that instruction in spelling patterns and strategies is needed for most students, this paper describes how instruction was based upon the results of the Developmental Spelling Test and the students\u27 writing samples. Four case studies will be presented in order to provide an in-depth look at the improvements that were demonstrated by the class as a whole
Magnetotransport in Sr3PbO antiperovskite with three-dimensional massive Dirac electrons
Novel topological phenomena are anticipated for three-dimensional (3D) Dirac
electrons. The magnetotransport properties of cubic
antiperovskite, theoretically proposed to be a 3D massive Dirac electron
system, are studied. The measurements of Shubnikov-de Haas oscillations and
Hall resistivity indicate the presence of a low density ( ) of holes with an extremely small cyclotron mass of
0.01-0.06. The magnetoresistance is linear in
magnetic field with the magnitude independent of temperature. These results
are fully consistent with the presence of 3D massive Dirac electrons in . The chemical flexibility of the antiperovskites and our findings
in the family member, , point to their potential as a model
system in which to explore exotic topological phases
Femtosecond studies of the reaction center of Rhodopseudomonas viridis: The very first dynamics of the electron-transfer processes
Automated water monitor system field demonstration test report. Volume 1: Executive summary
A system that performs water quality monitoring on-line and in real time much as it would be done in a spacecraft, was developed and demonstrated. The system has the capability to determine conformance to high effluent quality standards and to increase the potential for reclamation and reuse of water
Automated water monitor system field demonstration test report. Volume 2: Technical summary
The NASA Automatic Water Monitor System was installed in a water reclamation facility to evaluate the technical and cost feasibility of producing high quality reclaimed water. Data gathered during this field demonstration test are reported
- …