The Contribution of Wide Range of Space and Time Scales to the Northward Flux of Westerly Momentum

The contribution of a wide range of time scales to the long time average of atmospheric variances and covariances, and in particular on the contribution of the annual cycle is discussed. The interannual variability of seasonally averaged fluxes is analyzed in the same context. For definiteness, numerical results will be shown for the eddy momentum flux at 200 mb as obtained from seven years of NMC analyses (March 8, 1970 - March 10, 1977). The role of the seasonal cycle is considered

Thermal diffuse X-ray scattering in simple metals

Calculations are reported for the ionic structure factor and X-ray scattering cross section of sodium (at T=0 K and 90 K) and lithium (both isotopes at T=0 K) within the harmonic approximation. An evaluation of the appropriate displacement- displacement correlation function by the special point method circumvents the need for a multiphonon expansion. In the case of sodium, the structure in the one-phonon scattering was straightforwardly accounted for, and an approximate expansion was obtained for all multiphonon scattering. By treating core and conduction electrons on an equal footing, it is shown that information on the conduction electron system is present in the forward scattering component. In lithium the one-phonon cross section at small angles aids in the determination of the effective electron-ion interaction

Die Skrif: Die lig vir alle wetenskappe

Die kemvrae van hierdie tema sentreer rondom die aanduidinge: ‘die lig van die Skrif’ en ‘alle wetenskappe’. Daarom begin ons met enkele opmerkinge oor die aard van die Skrif-lig en vervolg dan met ’n besinning oor die betekenis daarvan vir die wetenskap

“Dancing with [Philly’s] Ghosts”: Recycled Materials and Meanings at an Artists’ Residency

What’s at stake in people’s relationships with objects? I examine this question based on two months of in-depth participant observation and twelve semi-structured interviews with artists from RAIR, an artist residency at a Philadelphia dump, where artists make work out of the discarded material fabric of a gentrifying, deindustrializing city (read: demolished buildings/dead peoples’ stuff). Building on the work of Karen Barad, a physicist-turned-philosopher who outlines an “onto epistemology” based on quantum mechanics, I explore how objects and people “intra-act” at RAIR to refigure time, reshape the city, and redefine the human. I demonstrate how a Baradian agential realist reading captures dynamics missed by both existing anthropologies of waste and other “new materialisms.” My analysis suggests, however, that we need a stronger ethic of accountability than Barad’s reading implies—one that centers social inequalities in our understanding of human/non-human relationships

Maize Endosperm Tissue Grown In Vitro I. Culture Requirements

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141953/1/ajb214396.pd