Výsledky vyhledávání - "Graham Hartwell"

Impacts of field margin orientation on populations of soil‐dwelling invertebrates in relation to the direction and intensity of field traffic

Autor: Debbie L. Sparkes, Andrew Mead, Andrew Beadle, Graham Hartwell, Phil J. Murray, Lianhai Wu, Karl Ritz, Lea Carlesso, Samantha M. Cook

Publikováno v: Soil Use and Management. 38:1015-1032

Sown field margins are a central part of agri-environmental schemes aiming to improve biodiversity and ecosystem services in agricultural landscapes. Despite the knowledge that key services are delivered by belowground biodiversity, the impacts of fi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16ec6136af5264726ca8322a27c17277
https://doi.org/10.1111/sum.12768

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Soil compaction effects on litter decomposition in an arable field: implications for management of crop residues and headlands

Autor: Debbie L. Sparkes, Andrew Beadle, Lianhai Wu, Karl Ritz, Jess Evans, Lea Carlesso, Graham Hartwell, Phil J. Murray, Samantha M. Cook

Soil compaction is a major threat to agricultural soils. Heavy machinery is responsible for damaging soil chemical, physical and biological properties. Among these, organic matter decomposition, which is predominantly mediated by the soil biota, is a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb8f4a3d121745939e36fb813e809dad
https://nottingham-repository.worktribe.com/file/1242366/1/1-s2.0-S0929139318308138-main

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A Solution of the Boundary Value Problem for Space Trajectories

Autor: John Graham Hartwell

Publikováno v: Navigation. 12:256-268

This paper discusses a solution to the boundary value problem for space trajectories which has been found to be easily mechanized. Specifically, when the initial time, initial position, terminal time, and terminal position have been prescribed for a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6996d349922a4e2d7ad05a8e2cc53dc0
https://doi.org/10.1002/j.2161-4296.1965.tb02141.x

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Planetary Approach Navigation

Autor: J. M. A. Danby, Arthur L. Jones, J. Graham Hartwell

Publikováno v: Navigation. 11:125-144

The approach navigation phase of planetary flight is used to assess the accuracy of the midcourse guidance operations and to provide the information required to determine the desirability of a trajectory correction prior to flyby or capture. In this

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::21062f10e71ccb9680f0e68a7666922c
https://doi.org/10.1002/j.2161-4296.1964.tb02087.x

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A reference orbit useful in integrating between activity spheres

Autor: Robert H. Flake, John Graham Hartwell

Publikováno v: AIAA Journal. 5:599-600

simultaneous solution may be subsonic, in contradiction to intuitive evidence that the point being investigated is downstream of the throat. The serious nature of the problem is confined to the neighborhood of Mach 1. By the time the solution has bee

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b365d163fbaf3071c9e560619f55aedf
https://doi.org/10.2514/3.4030

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