Výsledky vyhledávání - "J. L. Ramsey"

Design of multiband optics using updated athermal/achromatic glass map

Publikováno v: Advanced Optics for Defense Applications: UV through LWIR II.

Recently, optical materials have been developed by Schott and NRL to improve material selection in the SWIR, MWIR, and LWIR wavelength regions. In addition, new multiband detectors are reaching maturity, leading to a natural push for common aperture

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2340037a98e5c74b6783dcb9d980a477
https://doi.org/10.1117/12.2260898

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Athermalization and achromatization of multiband optics using instantaneous Abbe number

Autor: Blair L. Unger, J. L. Ramsey

Publikováno v: SPIE Proceedings.

Over the past few years, new detector technologies have enabled multiband detection through a single aperture. This creates significant SWAP advantages (size, weight and power) and has spurred significant interest in multiband optics (for instance SW

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e80e8af7195c8294f66a44b6e81ec0bc
https://doi.org/10.1117/12.2236870

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Experimental verification of the minimum number of diffractive zones for effective chromatic correction in the LWIR

Autor: Ken F. Walsh, J. L. Ramsey, M. Smith, John Deegan

Publikováno v: SPIE Proceedings.

With the move to smaller pixel sizes in the longwave IR region there has been a push for shorter focal length lenses that are smaller, cheaper and lighter and that resolve lower spatial frequencies. As a result lenses must have better correction for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0112707b3954d3757d843d10fa15a564
https://doi.org/10.1117/12.2223755

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Environmental, developmental, and genetic factors controlling root system architecture

Autor: H Moeiniyan Bagheri, R J L Ramsey, F. Malekpoor Mansoorkhani, Graham B. Seymour, Andrew J. Thompson, Ranjan Swarup

Publikováno v: Biotechnologygenetic engineering reviews. 30(1-2)

A better understanding of the development and architecture of roots is essential to develop strategies to increase crop yield and optimize agricultural land use. Roots control nutrient and water uptake, provide anchoring and mechanical support and ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f1a4aae98492de01d949590d7896d37
https://pubmed.ncbi.nlm.nih.gov/25652818

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Effect of humectants on the uptake and efficacy of glufosinate in wild oat (Avena fatua) plants and isolated cuticles under dry conditions

Autor: G. R. Stephenson, J. C. Hall, R. J. L. Ramsey

Publikováno v: Weed Science. 54:205-211

A series of dose–response experiments were performed at low humidity to determine if glufosinate efficacy could be increased by lengthening the drying time through the addition of humectants. Of several humectants evaluated, only 5% glycerol or 5%

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8666f9efcbc5033048ccf681aa39ca0
https://doi.org/10.1614/ws-05-051r.1

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A review of the effects of humidity, humectants, and surfactant composition on the absorption and efficacy of highly water-soluble herbicides

Autor: Gerald R. Stephenson, R. J. L. Ramsey, J.C. Hall

Publikováno v: Pesticide Biochemistry and Physiology. 82:162-175

It is well known that environmental conditions have an important influence on herbicide efficacy. In particular, the effect of humidity on herbicide uptake has been attributed to changes in cuticle hydration and droplet drying. As early as the 1950s,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a52eca4b666f08cd61d9397f63d0e2c
https://doi.org/10.1016/j.pestbp.2005.02.005

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Novel lens design for free-space optical interconnects

Autor: J. L. Ramsey, T. J. Hall, W. Pijitrojana

Publikováno v: SPIE Proceedings.

The transposition of signals in space is fundamental to the optical interconnection of electronic systems. Previous free-space implementations employed a scheme based on imaging systems that are prone to aberrations. The system proposed here is usefu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::087e78ea1be9a2437ddad7bde0dec6e2
https://doi.org/10.1117/12.692282

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