40 research outputs found

    Low-order spectral systems

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    August 1968.Includes bibliographical references.Sponsored by the National Science Foundation GA-761

    Numerical analysis of TIROS radiation observations

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    June 1965.Includes bibliographical references.Sponsored by the CSU project on the Meterology of the Southeast Asia Summer Monsoon DA 28-043-AMC-01303 (E)

    Modeling of interactions between biosphere and atmosphere on the global scale

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    Simulations of weather and climate with general circulation models show that the circulation and rainfall are sensitive to the transfers of radiation, sensible heat, water vapor, and momentum across the atmosphere land surface interface. Because, in nature, these transfers depend in large measure on the morphological and physiological characteristics of the surface vegetation, an interactive biosphere is needed for GCM's. The simple model of the biosphere (SiB) that the authors have constructed is based on the recognized difference between ground cover vegetation (grasses and other herbaceous plants) and canopy vegetation (trees and shrubs), where the latter act like elevated blocks of porous material which efficiently extract momentum from the air that flows through them; by a large number of multiple reflections enhance the absorption of the incident solar radiation; when the canopy is wet, act like well ventilated psychrometers which extract sensible heat from the air and produce a negative Bowen ratio; and, in all of these ways, behave differently from ground cover vegetation. The complete set of governing equations of SiB, whereby the various allowable combinations of trees, ground covers, and bare ground, in interaction with the atmosphere, determine all of the vegetation dependent transfers at the land surface, have been presented and described

    Computational stability and time truncation of coupled nonlinear equations with exact solutions

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    August 1968.Includes bibliographical references.Sponsored by the National Science Foundation GA-761

    Nonlinear dynamics of cyclone waves, The

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    June 1970.Includes bibliographical references.Sponsored by the National Science Foundation GA-11637

    Archive of Darkness:William Kentridge's Black Box/Chambre Noire

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    Situating itself in histories of cinema and installation art, William Kentridge's Black Box/Chambre Noire (2005) raises questions about screens, exhibition space, site-specificity and spectatorship. Through his timely intervention in a debate on Germany’s colonial past, Kentridge’s postcolonial art has contributed to the recognition and remembrance of a forgotten, colonial genocide. This article argues that, by transposing his signature technique of drawings for projection onto a new set of media, Kentridge explores how and what we can know through cinematic projection in the white cube. In particular, his metaphor of the illuminated shadow enables him to animate archival fragments as shadows and silhouettes. By creating a multi-directional archive, Black Box enables an affective engagement with the spectres of colonialism and provides a forum for the calibration of moral questions around reparation, reconciliation and forgiveness

    Alternate scale representation of atmospheric energy spectra, An

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    Includes bibliographical references

    Baroclinic instability and atmospheric development

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    October 1969.Includes bibliographical references.Sponsored by the National Science Foundation GA-11637

    General computational form for a class of nonlinear systems incorporating both spectral and finite difference approximations, A

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    February 1967.Includes bibliographical references (page 41).Sponsored by the National Science Foundation GA-761
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