21,710 research outputs found
The London Ambassadorship of David K.E. Bruce during the Wilson-Johnson years, 1964-68
Using recently released sources, this article offers a fresh perspective on the London ambassadorship of David K. E. Bruce in the years of Harold Wilson and Lyndon Johnson, 1964–68. Bruce's running of the US Embassy is examined, as are his views of the Anglo-American relationship. Further attention is given to his diplomatic management of the Anglo-American relationship in the context of the difficult personal relations between Wilson and Johnson and with regard to policy differences over the Vietnam War and Britain's position as a world power. It is argued that while Bruce did help to ease some of the personal strains between Wilson and Johnson, he was generally less significant to the White House than has previously been asserted. It is also contended that his vision of Britain joining the EEC, yet retaining extensive military commitments beyond Europe was not viable
‘The “Bowl of Jelly”: The Department of State in the Kennedy and Johnson Years, 1961-68’,
The article explores efforts to reform the State Department under presidents Kennedy and Johnson, with the intention of making the Department better able to lead and coordinate the sprawling foreign policy apparatus. However, Kennedy soon gave up on what he described as the 'bowl of jelly', so the reform effort was left to Johnson. Under him there were attempts to boost the State Department's internal efficiency and its ability to support counterinsurgency efforts. Yet there was a justified perception by the end of 1968 that the State Department was unredeemed managerially and in terms of its standing in the foreign policy nexus. Reasons for the lack of progress include sporadic presidential engagement, and Secretary of State Dean Rusk's limited aptitude for managerial affairs
Field renormalization in Photonic Crystal waveguides
A novel strategy is introduced in order to include variations of the
nonlinearity into the nonlinear schrodinger Equation. This technique, which
relies on renormalization, is in particular well adapted to nanostructured
optical systems where the nonlinearity exhibits large variations up to two
orders of magnitude larger than in bulk material. We show that it takes into
account in a simple and efficient way the specificity of the nonlinearity in
nanostructures that is determined by geometrical parameters like the effective
mode area and the group index. The renormalization of the nonlinear schrodinger
Equation is the occasion for physics oriented considerations and unveils the
potential of Photonic Crystal waveguides for the study of new nonlinear
propagation phenomena.Comment: to be published, Phys. Rev. A (2015
Atmospheric residence time of CH3Br estimated from the junge spatial variability relation
The atmospheric residence time for methyl bromide (CH3Br) has been estimated as 0.8 +/- 0.1 years from its empirical spatial variability relative to C2H6, C2Cl4, CHCl3, and CH3Cl. This evaluation of the atmospheric residence time, based on Junge's 1963 general proposal, provides an estimate for CH3Br that is independent of source and sink estimates. Methyl bromide from combined natural and anthropogenic sources furnishes about half of the bromine that enters the stratosphere, where it plays an important role in ozone destruction. This residence time is consistent with the 0.7-year value recently calculated for CH3Br from the combined strength estimates for its known significant sinks
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