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The David W. Fentress Family Letters, 1856-1969
No full textTranscript of a letter by an unidentified author to David Fentress regarding sharing federal newspapers and the banning of federal newspapers in some areas. The author passes on the news of the war including the destruction of the Federal merchantmen by the Confederate fleet. He passes along world news: Russia preparing to go to War with Europe and how that could negatively affect the Confederacy. There is also speculation on the future of the war
The David W. Fentress Family Letters, 1856-1969
No full textTranscript of a letter by an unidentified author to David Fentress regarding sharing federal newspapers and the banning of federal newspapers in some areas. The author passes on the news of the war including the destruction of the Federal merchantmen by the Confederate fleet. He passes along world news: Russia preparing to go to War with Europe and how that could negatively affect the Confederacy. There is also speculation on the future of the war
Portrait of author David Foster at the National Library of Australia, Canberra, 8 June 2011 /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author David Foster at the National Library of Australia, Canberra, 8 June 2011.; Acquired in digital format; access copy available online.; Mode of access: Online.; Photographed by a staff member of the National Library of Australia
Author David Foster with academic Jeff Doyle at the National Library of Australia, Canberra, 8 June 2011 /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author David Foster at the National Library of Australia, Canberra, 8 June 2011.; Acquired in digital format; access copy available online.; Mode of access: Online.; Photographed by a staff member of the National Library of Australia
Author David Foster and academic Jeff Doyle at the National Library of Australia, Canberra, 8 June 2011 /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author David Foster at the National Library of Australia, Canberra, 8 June 2011.; Acquired in digital format; access copy available online.; Mode of access: Online.; Photographed by a staff member of the National Library of Australia
David Braithwaite at White Waltham Steam Fair
No full textDavid Braithwaite, fairground enthusiast and author photographed at White Waltham Steam Fair, August 1964
David Zimmer Christmas letter
No full textThis Christmas letter written November 30, 1999, by David Zimmer is titled "Season's Greetings from the last of the Red-Hot-Santas!" It features an illustration of Santa Claus with a guitar, and a summary of Zimmer's year.
David Zimmer (1929-2005) was born in Harrisburg, Ohio. He enlisted in the U.S. Army and served for two years during the Korean War at the Brooke Army Medical Center in San Antonio, where he performed in drag for wounded soldiers. After the war, he returned to Ohio. Zimmer performed as Dolly Divine, a name inspired by the song "Hello Dolly." In 1964, he established the Berwick Ball with Orn Huntington, another important early gay activist in Central Ohio. The Ball began as a formal Halloween costume ball that provided a safe space to gather and enjoy drag shows for the gay community each year; over the years, it grew into an annual Halloween tradition and an important fundraiser for the AIDS movement and other charities. During the 1970s, Zimmer was also known for hosting lavish parties at his Harrisburg home. In 1989, he moved to the German Village area of Columbus where he remained active in the community. During the 1990s, Zimmer continued to perform in and out of drag and commissioned costume designer Dick Frank to make elaborate outfits. Zimmer worked for Huntington National Bank for 39 years and was a member of the Harrisburg United Methodist Church, Veterans of Foreign Wars and the German Village Society
David Zimmer Christmas letter
No full textThis Christmas letter was written December 7, 2004, by David Zimmer. It features a small illustration of Santa Claus, a summary of Zimmer's year, and a clipping from the Village Crier recognizing his 75th birthday celebration.
David Zimmer (1929-2005) was born in Harrisburg, Ohio. He enlisted in the U.S. Army and served for two years during the Korean War at the Brooke Army Medical Center in San Antonio, where he performed in drag for wounded soldiers. After the war, he returned to Ohio. Zimmer performed as Dolly Divine, a name inspired by the song "Hello Dolly." In 1964, he established the Berwick Ball with Orn Huntington, another important early gay activist in Central Ohio. The Ball began as a formal Halloween costume ball that provided a safe space to gather and enjoy drag shows for the gay community each year; over the years, it grew into an annual Halloween tradition and an important fundraiser for the AIDS movement and other charities. During the 1970s, Zimmer was also known for hosting lavish parties at his Harrisburg home. In 1989, he moved to the German Village area of Columbus where he remained active in the community. During the 1990s, Zimmer continued to perform in and out of drag and commissioned costume designer Dick Frank to make elaborate outfits. Zimmer worked for Huntington National Bank for 39 years and was a member of the Harrisburg United Methodist Church, Veterans of Foreign Wars and the German Village Society
Enhanced light extraction by photonic quasi-crystals in GaN blue LEDs
Full text linkThe far-field profile of photonic quasi-crystal patterned and unpatterned LEDs, fabricated from commercial epitaxial substrates by electron beam lithography, has been measured prior to lapping and dicing. Emission enhancements reach a maximum of 62%, and are strongly dependent on the filling factor. Qualitative agreement is achieved between 2-D finite-difference time-domain calculations and the experimental data
Computational design and microfabrication of photonic crystals
No full textPhotonic crystals are artificial dielectric lattice structures which may be periodic in up to three dimensions. These strongly diffractive structures interact with electromagnetic radiation in such a way that radiation becomes quantized into discrete energy bands. This results in an optical energy range (known as an optical band gap), for which no modes of propagation are supported by the structure.Photonic crystals can be regarded as either strongly scattering sub-wavelength structures, multi-dimensional diffraction gratings, or as quantum optical devices. Methods of computational analysis are similar to those used to model the properties of electron waves propagating in semiconductor materials, or the interference of waves in multi-layer stacks. Until recently photonic crystals have proven impossible to fabricate at optical wavelengths due to the required sub-micron dimensions.This thesis describes many important advances in the field of photonic crystals, both theoretical and practical, culminating in the demonstration of the first ever photonic crystal waveguide devices with polarisation dependent band gaps at visible wavelengths.Firstly a detailed description of the two-dimensional plane wave method of analysis is given by way of introduction to the theory. This has traditionally been applied to model nominally two-dimensionally periodic lattice structures. However, any device which can actually be fabricated will always have finite height. This greatly modifies the photonic properties. For this reason, the plane wave method is extended to perform a rigorous 'three-dimensional' analysis of a nominally two-dimensionally periodic structure.Some of the most useful future applications for photonic crystals are anticipated to require a planar waveguide geometry. For this reason, the three-dimensional plane wave model has been modified to accurately calculate the guided Bloch-mode structure of photonic crystals incorporated within the guiding core layer of a planar optical waveguide. Two different methods are presented, both of which take full account of the highly dispersive dielectric waveguide boundary conditions. In addition, the latter method also allows the accurate evaluation of the effective mode index of the photonic crystal, as seen by any selected confined Bloch mode. This can be used for the optimisation of mode coupling between a photonic crystal and the outside world.</p
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