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1.
Patricia D. Morrell Camille Wainwright Lawrence Flick 《School science and mathematics》2004,104(5):199-213
The purposes of this study were to observe the teaching practices occurring in student teachers' science and mathematics K‐12 classrooms, compare the student teachers' perceptions of their teaching with what was actually occurring in their classrooms, and determine which college faculty members and courses these student teachers felt contributed to the teaching methods they used. Data on each student teacher were gathered via field notes of three classes, an observation protocol completed after each lesson, and an interview. Composites were written for each of the students. The total data set of all composites was examined to see if any patterns generalizable to the whole were evident. Differences between and among grade levels and content areas surfaced and are discussed. 相似文献
2.
Li L Schülzgen A Temyanko VL Qiu T Morrell MM Wang Q Mafi A Moloney JV Peyghambarian N 《Optics letters》2005,30(10):1141-1143
We report fabrication and testing of the first phosphate glass microstructured fiber lasers with large Er-Yb-codoped cores. For an 11-cm-long cladding-pumped fiber laser, more than 3 W of continuous wave output power is demonstrated, and near single-mode beam quality is obtained for an active core area larger than 400 microm2. 相似文献
3.
We consider diffraction by a semi-infinite crack located alonga fusion interface between two differing elastic media. Twotypes of crack, namely open and partially closed cracks, areinvestigated. An open crack is modelled by a stress-free contactboundary condition and a partially closed crack is modelledby a spring contact boundary condition. For the latter, thejump in the stress across the crack is assumed to be proportionalto the jump in the displacement across the crack. This situationarises in, for example, a K-weld where the fine grain of theparent material (for example, ferritic or forged austeniticsteel) is in stark contrast with the coarse-grained weld metal(for example, austenitic weld metal). In the metal weld thedirection of the grain axis varies through the metal. However,diffraction is a local phenomenon and so the austenitic steelis assumed to have a zonal axis so that it may be modelled bya transversely isotropic composite. The ferritic or forged austeniticsteel will be modelled as an isotropic material. 相似文献
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T. T. Morrell 《Fresenius' Journal of Analytical Chemistry》1877,16(1):251
Ohne Zusammenfassung 相似文献
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P. N. Kogerman G. Egloff J. C. Morrell Ch. Wirth III G. B. Murphy 《Analytical and bioanalytical chemistry》1935,100(5-6):238-238
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E. Wendehorst E. Knoche S. S. Nametkin E. A. Robinson M. J. Herbrich G. Egloff J. C. Morrell P. Truesdell O. C. Bridgeman J. C. Molitor T. H. Rogers V. Voorhees H. O. Ervin E. R. Gillis C. C. Minter und A. Dongescu 《Fresenius' Journal of Analytical Chemistry》1935,102(7-8):308-312
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