486 research outputs found
People, Objects, and Ideas Arriving in Porcupine, 1909-1929
No full textMap and data of people, objects, and ideas moving into the Porcupine gold fields from the world between 1909 and 1929. Created by author with the support of the Sherman Centre for Digital Scholarship, McMaster University, 2017. Associated with Mica Jorgenson, ""Treasure House to the World:" A Global Environmental History of the Porcupine Gold Rush, 1909-1929," (PhD Diss., McMaster University, 2018)
Schooltalk: Rethinking What We Say About —and to—Students Every Day By Mica Pollock
No full textSchooltalk: Rethinking What We Say About—and to—Students Every Day By Mica Pollock (The New Press, 2017). Reviewed by Emily Schnee
Schooltalk: Rethinking What We Say About —and to—Students Every Day By Mica Pollock
No full textSchooltalk: Rethinking What We Say About—and to—Students Every Day By Mica Pollock (The New Press, 2017). Reviewed by Emily Schnee.</jats:p
A companion to the anthropology of education/ edit.: Bradley A. Levinson and Mica Pollock
No full textxix, p.572.; 25 c
A companion to the anthropology of education/ edit.: Bradley A. Levinson and Mica Pollock
No full textxix, p.572.; 25 c
Flipping Our Scripts about Undocumented Immigration
No full textThis critical family history explores a common script about undocumented immigration: that undocumented immigrants unfairly have refused to “stand in line” for official, sanctioned immigration and instead have broken rules that the rest of “our” families have followed. Noting a hole in her knowledge base, the author put herself on a steep learning curve to “clean her lenses”—to learn more information about opportunities past and present, so she could see and discuss the issue more clearly. The author sought new and forgotten information about immigration history, new information about her own family, and details about actual immigration policy. She wrote this piece to share a few script-flipping realizations, in case they can shortcut this journey for others
#10 What Are We Saying to Our Students
No full textMica Pollock, author of Schooltalk: Rethinking What We Say About - and to - Students Every Day (The New Press), explores how our most routine talk in schools needs to support equity and the role educators must play in the immediate and long haul effort against hate and inequality.https://educate.bankstreet.edu/librarysalons/1009/thumbnail.jp
The mica polarizing prism
No full textThesis (M.S.)--University of Rochester. College of Engineering and Applied Science. Institute of Optics. This thesis was digitized by the Institute of Optics in 2014 and was determined to have lapsed into the public domain. If you are the author and have questions about the digitization of your work, please contact Kari Brick, Graduate Program Coordinator for the Institute of Optics, at [email protected]. Other contact information for the Institute is available at http://www.optics.rochester.eduA polarizing prism and beamsplitter of interferometric quality has been made by optically contacting muscovite mica to glass prisms. The prism differs from the Fuessner-Sang designs, since mica is used instead of calcite. The optical contact bond is vital to the realization of interferometric quality in both beams from the beamsplitter, and eliminates all the depolarizing effects from scratches, dust, or stain which would be introduced by a cement. The prism consequently matches the extinction ratios afforded only by the highest quality conventional calcite prisms.
The polarizing prism that was constructed has an acceptance angle of 5.4 degrees and a length to width ratio of 2.4 to 1. It transmits from 450 to 2000 n.m., and with single layer anti-reflection coatings the transmission is over 40%. It also does not suffer from axial color as do calcite prisms.
Muscovite mica is inexpensive, and large sheets can be cleaved to an interferometric grade. The mica polarizing prism can therefore be produced to have apertures several inches in diameter which is a major advantage over calcite prisms, and still maintain the high extinction ratio and interferometric grade at a much lower cost.
Polarized light may now be considered as a new degree of freedom for many optical applications in that the drawbacks due to high cost and low optical quality continually encountered in polarizing optics may be eliminated through the use of the mica polarizing prism
POLYETHYLENE CRYSTAL LAMELLA GROWTH ON THE MICA
No full textThe polyethylene thin films on the mica (001) plane have been prepared by the ionized cluster beam deposition technique and analyzed by the transmission electron microscope. We have found that the polyethylene crystal lamellar structures are obviously affected by the crystal mica substrate. We have observed the Moire fringe pattern and the overlap diffraction spot array for both crystal thin films, as well as explained that the polyethylene subunit cell grows along the direction which rotates 60-degrees relative to the unit cell of the mica (001) plane.Materials Science, Coatings & FilmsPhysics, AppliedSCI(E)
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