Three poems

This contribution contains three poems. Two -- "Bay Landscape" and "Waste" -- are about pollution, cancer, art and loss of one's mother. The third, "To You Who Have Been Invaded by America," is an antiwar poem.Esta contribución contiene tres poemas. Dos de ellos "Bay Landscape" y "Waste" - tratan de la polución, el cáncer, el arte y la pérdida de la madre. El tercero, "To You Who Have Been Invaded by America," es un poema antibélico

Three poems

This contribution contains three poems. Two -- "Bay Landscape" and "Waste" -- are about pollution, cancer, art and loss of one's mother. The third, "To You Who Have Been Invaded by America," is an antiwar poem.Esta contribución contiene tres poemas. Dos de ellos "Bay Landscape" y "Waste" - tratan de la polución, el cáncer, el arte y la pérdida de la madre. El tercero, "To You Who Have Been Invaded by America," es un poema antibélico

Some considerations about coastal ocean observing systems

Author Posting. © The Authors, 2017. This article is posted here by permission of Sears Foundation for Marine Research for personal use, not for redistribution. The definitive version was published in Journal of Marine Research 75 (2017): 161-188, doi:10.1357/002224017821836743.Coastal ocean observing capabilities are evolving rapidly, both in terms of sensors and in terms of the volume of information available. We discuss the aspects of the coastal ocean that make it a unique environment, both in terms of physical processes and measurement techniques. Although many global-level systems are relevant to the coastal ocean, we concentrate on treating systems that are unique to the continental shelf environment. Further, we briefly discuss examples of measurement systems that would be useful for developing and driving ocean prediction systems.KB gratefully acknowledges support from the U.S. National Science Foundation, Physical Oceanography (grant OCE-1433953) and Ocean Biology (grant OCE-1258667) programs. AK gratefully acknowledges support from the U.S. National Science Foundation, Physical Oceanography (grant OCE-1332646)

On the significance of stratigraphy in the prediction of the engineering behaviour of soils and rocks in Southern Africa

The object of this thesis is to demonstrate that a knowledge of the stratigraphic unit occupying a site provides a basis for making broad generalisations regarding likely terrain and foundation conditions which may be used to advantage in designing a relevant site investigation programme. Stated simply: very different exploration programmes would be designed for a house on Oranqe Grove quartzite and a dam on Transvaal dolomite. If climate as well as stratigraphy, is taken into account we may recognise a Regional Stratigraphic unit and achieve a higher level of generalisation which will lead to more accurate predictions being made regarding the likely engineering properties of the local rocks and soils. Subdivision of the regional stratigraphic unit into land patterns, and of land patterns into their constitutent land facets, represent yet further advances from lower to higher levels of generalisation. Apart from specific case histories, however, it is the regional stratigraphic unit that is adopted as the main level of discussion throughout most of the thesis. The importance of the correct identification of the origin of each horizon of the soil profile during site investigation work is emphasised as this, too, may lead to meaningful predictions regarding the engineering behaviour of the soil. The significance of the pebble marker as an aid to the correct identification of soil origin is also emphasised. The introductory chapter concludes with a number of very broad generalisations about the typical forms of the soil profile in Southern Africa and the environmental factors responsible for their development.Thesis (DSc)--University of Pretoria, 1977.GeologyDScUnrestricte

Breakdown: Treatment Gaps in New York City\u27s Mental Health System

Forty years after New York City began to deinstitutionalize its mental health system in hopes of building community-based care, the city is still falling short. This investigative project, undertaken by six reporters at CUNY\u27s Graduate School of Journalism, uncovers the treatment gaps facing mentally ill New Yorkers, who are among the most vulnerable in the city. The project follows them to the actual places where they seek care: hospitals, clinics, homeless shelters, prisons and schools

Conjectures about certain parabolic Kazhdan--Lusztig polynomials

Irreducibility results for parabolic induction of representations of the general linear group over a local non-archimedean field can be formulated in terms of Kazhdan--Lusztig polynomials of type $A$. Spurred by these results and some computer calculations, we conjecture that certain alternating sums of Kazhdan--Lusztig polynomials known as parabolic Kazhdan--Lusztig polynomials satisfy properties analogous to those of the ordinary ones.Comment: final versio

Bacterial communities in the rumen of Holstein heifers differ when fed orchardgrass as pasture vs. hay

The rich and diverse microbiota of the rumen provides ruminant animals the capacity to utilize highly fibrous feedstuffs as their energy source, but there is surprisingly little information on the composition of the microbiome of ruminants fed all-forage diets, despite the importance of such agricultural production systems worldwide. In three 28-d periods, three ruminally-cannulated Holstein heifers sequentially grazed orchardgrass pasture (OP), then were fed orchardgrass hay (OH), then returned to OP. These heifers displayed greater shifts in ruminal bacterial community composition (determined by automated ribosomal intergenic spacer analysis and by pyrotag sequencing of 16S rRNA genes) than did two other heifers maintained 84 d on the same OP. Phyla Firmicutes and Bacteroidetes dominated all ruminal samples, and quantitative PCR indicated that members of the genus Prevotella averaged 23 % of the 16S rRNA gene copies, well below levels previously reported with cows fed total mixed rations. Differences in bacterial community composition and ruminal volatile fatty acid (VFA) profiles were observed between the OP and OH despite similarities in gross chemical composition. Compared to OP, feeding OH increased the molar proportion of ruminal acetate (P = 0.02) and decreased the proportion of ruminal butyrate (P < 0.01), branched-chain VFA (P < 0.01) and the relative population size of the abundant genus Butyrivibrio (P < 0.001), as determined by pyrotag sequencing. Despite the low numbers of animals examined, the observed changes in VFA profile in the rumens of heifers on OP vs. OH are consistent with the shifts in Butyrivibrio abundance and its known physiology as a butyrate producer that ferments both carbohydrates and proteins

All-sky convolution for polarimetry experiments

We discuss all-sky convolution of the instrument beam with the sky signal in polarimetry experiments, such as the Planck mission which will map the temperature anisotropy and polarization of the cosmic microwave background (CMB). To account properly for stray light (from e.g. the galaxy, sun, and planets) in the far side-lobes of such an experiment, it is necessary to perform the beam convolution over the full sky. We discuss this process in multipole space for an arbitrary beam response, fully including the effects of beam asymmetry and cross-polarization. The form of the convolution in multipole space is such that the Wandelt-Gorski fast technique for all-sky convolution of scalar signals (e.g. temperature) can be applied with little modification. We further show that for the special case of a pure co-polarized, axisymmetric beam the effect of the convolution can be described by spin-weighted window functions. In the limits of a small angle beam and large Legendre multipoles, the spin-weight 2 window function for the linear polarization reduces to the usual scalar window function used in previous analyses of beam effects in CMB polarimetry experiments. While we focus on the example of polarimetry experiments in the context of CMB studies, we emphasise that the formalism we develop is applicable to anisotropic filtering of arbitrary tensor fields on the sphere.Comment: 8 pages, 1 figure; Minor changes to match version accepted by Phys. Rev.

T Follicular Helper Cells Have Distinct Modes of Migration and Molecular Signatures in Naive and Memory Immune Responses

SummaryB helper follicular T (Tfh) cells are critical for long-term humoral immunity. However, it remains unclear how these cells are recruited and contribute to secondary immune responses. Here we show that primary Tfh cells segregate into follicular mantle (FM) and germinal center (GC) subpopulations that display distinct gene expression signatures. Restriction of the primary Tfh cell subpopulation in the GC was mediated by downregulation of chemotactic receptor EBI2. Following collapse of the GC, memory T cells persisted in the outer follicle where they scanned CD169+ subcapsular sinus macrophages. Reactivation and intrafollicular expansion of these follicular memory T cells in the subcapsular region was followed by their extrafollicular dissemination via the lymphatic flow. These data suggest that Tfh cells integrate their antigen-experience history to focus T cell help within the GC during primary responses but act rapidly to provide systemic T cell help after re-exposure to the antigen