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Showing 1 to 12 of 169 entries
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Considerations for designing group randomized trials of professional development with teacher knowledge outcomes

Educational trials

Kelcey B, Phelps G.
GSID: MxZxfR4eAjMJ
B Kelcey, G Phelps - Educational Evaluation and Policy …, 2013 - journals.sagepub.com

Despite recent shifts in research emphasizing the value of carefully designed experiments, the number of studies of teacher professional development with rigorous designs has lagged behind its student outcome counterparts. We outline a framework for the design of group...

Strategies for improving power in school-randomized studies of professional development

classroom interventions

Kelcey B, Phelps G.
GSID: pdXCP1xXHNkJ
B Kelcey, G Phelps - Evaluation Review, 2013 - journals.sagepub.com

Objectives: Group-randomized designs are well suited for studies of professional development because they can accommodate programs that are delivered to intact groups …

Topics in the Journal of Counseling Psychology, 1963-2015.

Journal of counseling psychology

Oh J, Stewart AE, Phelps RE.
PMID: 29154573
J Couns Psychol. 2017 Nov;64(6):604-615. doi: 10.1037/cou0000218.

Historical trends in a scientific field should be apparent in the changing content of journal articles over time. Using a topic modeling approach, a statistical method for quantifying the thematic content of text, 70 topics were extracted from the...

Strategies for Improving Power in School-Randomized Studies of Professional Development.

Evaluation review

Kelcey B, Phelps G.
PMID: 24966200
Eval Rev. 2013 Dec;37(6):520-554. doi: 10.1177/0193841X14528906. Epub 2014 Jun 24.

OBJECTIVES: Group-randomized designs are well suited for studies of professional development because they can accommodate programs that are delivered to intact groups (e.g., schools), the collaborative nature of professional development, and extant teacher/school assignments. Though group designs may be...

Generation of electromagnetic fields of extremely high intensity by coherent summation of Cherenkov superradiance pulses.

Physical review letters

Ginzburg NS, Cross AW, Golovanov AA, Mesyats GA, Pedos MS, Phelps AD, Romanchenko IV, Rostov VV, Rukin SN, Sharypov KA, Shpak VG, Shunailov SA, Ulmaskulov MR, Yalandin MI, Zotova IV.
PMID: 26406835
Phys Rev Lett. 2015 Sep 11;115(11):114802. doi: 10.1103/PhysRevLett.115.114802. Epub 2015 Sep 11.

We demonstrate both theoretically and experimentally the possibility of correlating the phase of a Cherenkov superradiance (SR) pulse to the sharp edge of a current pulse, when spontaneous emission of the electron bunch edge serves as the seed for...

Beyond JAAD July 2016: Articles of interest from the nondermatologic literature.

Journal of the American Academy of Dermatology

Bronin A, Phelps R, Sidbury R.
PMID: 27317531
J Am Acad Dermatol. 2016 Jul;75(1):240-2. doi: 10.1016/j.jaad.2016.03.037.

No abstract available.

Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser.

Physical review letters

Wiggins SM, Jaroszynski DA, McNeil BW, Robb GR, Aitken P, Phelps AD, Cross AW, Ronald K, Ginzburg NS, Shpak VG, Yalandin MI, Shunailov SA, Ulmaskulov MR.
PMID: 11018893
Phys Rev Lett. 2000 Mar 13;84(11):2393-6. doi: 10.1103/PhysRevLett.84.2393.

Ultrashort pulses of microwave radiation have been produced in a dielectric-lined Cherenkov free-electron maser (FEM) amplifier. An intense initial seed pulse, due to coherent spontaneous emission (CSE), arises at the leading edge of the electron pulse. There is evidence...

Effective coupling of cyclotron autoresonance maser and "gyrotron" modes on a phase-synchronized electron beam.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Savilov AV, Bratman VL, Phelps AD, Samsonov SV.
PMID: 11088948
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Sep;62(3):4207-15. doi: 10.1103/physreve.62.4207.

For a cyclotron resonance maser (CRM) with a helical axis-encircling electron beam, the possibility of a strong interaction between cutoff (gyrotron) and traveling Doppler-up-shifted (cyclotron autoresonance maser) modes, which are in resonance with the electrons at the same frequency,...

Theory and design of a free-electron maser with two-dimensional feedback driven by a sheet electron beam.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Ginzburg NS, Peskov NY, Sergeev AS, Phelps AD, Konoplev IV, Robb GR, Cross AW, Arzhannikov AV, Sinitsky SL.
PMID: 11969839
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Jul;60(1):935-45. doi: 10.1103/physreve.60.935.

The use of two-dimensional Bragg resonators of planar geometry, realizing two-dimensional (2D) distributed feedback, is considered as a method of producing spatially coherent radiation from a large sheet electron beam. The spectrum of eigenmodes is found for a 2D...

Dispersion of helically corrugated waveguides: analytical, numerical, and experimental study.

Physical review. E, Statistical, nonlinear, and soft matter physics

Burt G, Samsonov SV, Ronald K, Denisov GG, Young AR, Bratman VL, Phelps AD, Cross AW, Konoplev IV, He W, Thomson J, Whyte CG.
PMID: 15600525
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Oct;70(4):046402. doi: 10.1103/PhysRevE.70.046402. Epub 2004 Oct 07.

Helically corrugated waveguides have recently been studied for use in various applications such as interaction regions in gyrotron traveling-wave tubes and gyrotron backward-wave oscillators and as a dispersive medium for passive microwave pulse compression. The paper presents a summary...

Engineering Information--All Is Not Lost: Literature is being effectively used despite current lack of efficient mechanical retrieval systems.

Science (New York, N.Y.)

Phelps RH.
PMID: 17794349
Science. 1959 Jan 02;129(3340):25-7. doi: 10.1126/science.129.3340.25.

No abstract available.

Synthesis of Indoleacetic Acid via Tryptamine by a Cell-free System from Tobacco Terminal Buds.

Plant physiology

Phelps RH, Sequeira L.
PMID: 16656632
Plant Physiol. 1967 Aug;42(8):1161-3. doi: 10.1104/pp.42.8.1161.

No abstract available.

Showing 1 to 12 of 169 entries