منابع مشابه
Umkehr Maps
In this note we study umkehr maps in generalized (co)homology theories arising from the Pontrjagin-Thom construction, from integrating along fibers, pushforward homomorphisms, and other similar constructions. We consider the basic properties of these constructions and develop axioms which any umkehr homomorphism must satisfy. We use a version of Brown representability to show that these axioms ...
متن کاملNew Umkehr ozone retrieval
A new Dobson Umkehr ozone profile retrieval method optimising information content and resolution K. Stone, M. B. Tully, S. K. Rhodes, and R. Schofield School of Earth Sciences, University of Melbourne, Victoria, 3010, Australia ARC Centre of Excellence for Climate System Science, University of New South Wales, Sydney, New South Wales, 2052, Australia Bureau of Meteorology, Melbourne, Victoria, ...
متن کاملAerosol Effect on Umkehr Ozone Profiles using SAGE II Measurements
This study examines 1211 cases of coincident ozone profiles derived from 1164 Umkehrs and 928 SAGE II profiles within 1000 km and 12 hours between October 1984 and April 1989 to study the stratospheric-aerosol effect on Umkehr ozone profiles. Because of the close correspondence of stratospheric aerosol optical depth at the SAGE II-measured 0.525 micron wavelength and the extrapolated 0.32 Umkeh...
متن کاملA new Dobson Umkehr ozone profile retrieval method optimising information content and resolution
The standard Dobson Umkehr methodology to retrieve coarse-resolution ozone profiles used by the National Oceanographic and Atmospheric Administration uses designated solar zenith angles (SZAs). However, some information may be lost if measurements lie outside the designated SZA range (between 60 and 90), or do not conform to the fitting technique. Also, while Umkehr measurements can be taken us...
متن کاملStability of F-biharmonic maps
This paper studies some properties of F-biharmonic maps between Riemannian manifolds. By considering the first variation formula of the F-bienergy functional, F-biharmonicity of conformal maps are investigated. Moreover, the second variation formula for F-biharmonic maps is obtained. As an application, instability and nonexistence theorems for F-biharmonic maps are given.
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ژورنال
عنوان ژورنال: Homology, Homotopy and Applications
سال: 2009
ISSN: 1532-0073,1532-0081
DOI: 10.4310/hha.2009.v11.n1.a2