843 resultados para Tales, African.
Resumo:
Objective: To perform a systematic review of the literature on SIDS and SUID deaths concentrated in the African-American community, describe health education and policy recommendations and recommend a new approach that may aid in decreasing the disparity of infant mortality in the African-American community. ^ Methods: The PubMed database was systematically searched to identify relevant articles for final review and analysis. Using the CASP 2006 system to critique literature, twelve articles were found that met inclusion and exclusion criteria. ^ Results: Evidence in the literature confirmed there was a current disparity among African Americans' infant mortality rates in comparison to other US ethnic groups. The underlying reasons for these disparities included the following maternal and infant characteristics: mothers younger than eighteen, having more than one live infant, having a high school education or less, never been married, and have infants born preterm or with low birth weight. Maternal smoking, substance abuse, and breastfeeding did not have a significant impact on infant sleep environments among African Americans. ^ Conclusion: Tailored health education programs at the community level, better access to pre-pregnancy and prenatal care, and increased maternal perception of risk that is relevant to the infants sleeping environment are all possible solutions that may decrease African American infant mortality rates.^
Resumo:
Grandparents, particularly, grandmothers in the African American community have historically provided needed care for their grandchildren (Crewe, 2003). Before there was a child welfare system that addressed the needs of African American children, there were grandmothers who served as the safety net for their biological, informally adopted grandchildren, and other minor relatives. They cared for grandchildren and others whose birth parents were unable or unwilling to care for them. For families of color, HIV/AIDS is an emerging issue that is contributing to the growing numbers of grandparent-headed households. And once again, many African American grandmothers have accepted the challenge of holding their families together. This article addresses the HIV/AIDS public health challenge in the African American community with specific focus on its impact on older grandparents responsible for raising children of infected biological parents. It advocates for a model that continues to strengthen the Children’s Bureau investment in kinship care through integrating the needs of children and their aging caregivers.
Resumo:
Prevalence of drug use, HIV, syphilis, and other STDs is particularly high in African-American populations. Although some studies have documented protective changes in health behaviors relevant to these outcomes, other research indicates that risky health behaviors are still widespread. Moreover, little is known about how African-American men and women have differed in their responses to calls to adopt protective behaviors. The study reported in this dissertation investigates gender differences in health risk behavior in a sample of 482 African American chronic, frequent injection drug and crack cocaine users residing in Houston, Texas. It uses baseline and 9 month follow-up data collected on this sample. Four major research questions are addressed. These questions are: Research question 1. What was the overall pattern of reduction in drug use for subjects in the sample? In particular, did subjects who reported a recent (30 day) reduction in drug use and needle sharing risk at baseline also report a reduction at follow-up? Research question 2. Is gender significantly associated with the overall pattern of risk reduction in drug injection observed in the two waves of the study? Research question 3. Is gender significantly associated with the overall pattern of reduction in the number of sexual partners observed in the two waves of the study? Research question 4. Is gender significantly associated with the overall pattern of increase in the use of barrier contraceptives in the two waves of the study? ^
Resumo:
This dataset characterizes the evolution of western African precipitation indicated by marine sediment geochemical records in comparison to transient simulations using CCSM3 global climate model throughout the Last Interglacial (130-115 ka). It contains (1) defined tie-points (age models), newly published stable isotopes of benthic foraminifera and Al/Si log-ratios of eight marine sediment cores from the western African margin and (2) annual and seasonal rainfall anomalies (relative to pre-industrial values) for six characteristic latitudinal bands in western Africa simulated by CCSM3 (two transient simulations: one non-accelerated and one accelerated experiment).
Resumo:
The CaCO3-contents and the fractions > 40 µm have been analysed from 5 kastenloten, one piston core and two kastengreifer taken between Senegal and Cape Verde Islands. Numerous benthonic and planktonic organisms and different terrigenous components have been distinguished. The four cores off Senegal reach middle Wuerm sediments; cores GIK12329-6 and TAG72-1 reach the V-zone and core GIK12331-4 the X-zone (Eem); the two kastengreifer contain sediments of Holocene age. Correlation of the cores has been made. Holocene sedimentation rates decrease from the shallow cores (6-11 cm/1000 years) to the deep-sea (1-2 cm/1000 years). The following climatic variations could be deduced from the sediments off the Senegal: during Holocene climate was in general as today, the Senegal river transporting fine grained material to the sea. The upper Wuerm was arid with no river influence but with red dune sand transported to the continental slope. During middle Wuerm the climate was humid again. The deep-sea cores have been influenced by eolian material from arid regions during glacial and interglacial periods, indicated by relatively high "Wuestenquarz-numbers". However, during Wuerm "Wuestenquarz-numbers" are higher than during Holocene and Eem, indicating that more intensely red coloured sediment was exposed to wind activity on the continent during this period. Varying amounts of terrigenous material and CaCO3-contents indicate varying wind strengths (lower in Holocene and Eem than during Wuerm). The boundary between humid and arid Wuerm climate was at approximately 20 °N. Influence of upwelling is difficult to establish in the sediments off Senegal, because river influence, while increasing fertility also dilutes the diatoms which are typical for upwelling. High amounts of organic carbon, low plankton/benthos ratios of foraminifers and low plankton foraminifer/radiolarian ratios in Holocene sections might be interpreted as influenced by upwelling. Turbidites occur in cores 72 and 31 and at the Holocene/Pleistocene boundary of core GIK12329-6. Their composition indicates provenance from the continental shelf of the Cape Verde Islands for core 31 and the continental shelf and slope off Senegal for core TAG72-1. Volcanic material, rare in the normal pelagic sediment of core GIK12331-4 is more frequent in the turbidites.
Resumo:
This is part 2 of a study examining southwest African continental margin sediments from nine sites on a north-south transect from the Congo Fan (4°S) to the Cape Basin (30°S) representing two glacial (MIS 2 and 6a) and two interglacial stages (MIS 1 and 5e). Contents, distribution patterns, and molecular stable carbon isotope signatures of long-chain n-alkanes (C27-C33) and n-alkanols (C22-C32) as indicators of land plant vegetation of different biosynthetic types were correlated with concentrations and distributions of pollen taxa in sediments of the same time horizons. Selected single pollen type data reveal details of vegetation changes, but the overall picture is best illustrated by summing pollen known to predominantly derive from C4 plants or C4 plus CAM plants. The C4 plant signals in the biomarkers are recorded in the delta13C data and in the abundances of C31 and C33 n-alkanes, and the C32 n-alkanol. Calculated clusters of wind trajectories for austral summer and winter situations for the Holocene and the Last Glacial Maximum afford information on the source areas for the lipids and pollen and their transport pathways to the ocean. This multidisciplinary approach provides clear evidence of latitudinal differences in leaf wax lipid and pollen composition, with the Holocene sedimentary data paralleling the current major phytogeographic zonations. The northern sites (Congo Fan area and northern Angola Basin) get most of their terrestrial material from the Congo Basin and the Angolan highlands dominated by C3 plants. Airborne particulates derived from the western and central South African hinterland dominated by deserts, semideserts, and savannah regions are rich in organic matter from C4 plants. As can be expected from the present and glacial positions of the phytogeographic zones, the carbon isotopic signatures of n-alkanes and n-alkanols both become isotopically more enriched in 13C from north to south. In the northern part of the transect the relative importance of C4 plant indicators is higher during the glacials than in the interglacials, indicating a northward extension of arid zones favoring grass vegetation. In the south, where grass-rich vegetation merges into semidesert and desert, the difference in C4 plant indicators is small.
Resumo:
A mediados del siglo XVIII los grandes comerciantes de distintos espacios hispanoamericanos, acumulan suficientes caudales que les permiten comprar títulos de nobleza, distinciones o formar mayorazgos que relumbren sus nombres y perpetúen sus bienes adquiridos. Este proceso es mayormente evidente en los espacios mexicanos y peruanos; pero no se conocen casos concretos para el espacio rioplatense. Como planteó José Torre Revello, esto no implica que los comerciantes rioplatenses no intentasen ennoblecerse. El presente estudio de caso detalla como Don Vicente de Azcuénaga intenta fundar un mayorazgo en la ciudad de Buenos Aires a favor de su primogénito Miguel. A través de este estudio basado en las "probanzas" se puede observar como la familia Azcuénaga pretende resaltar su nombre frente al resto de sus contemporáneos, pero las relaciones entre padre e hijo nos conducen a la vez a replantearnos interrogantes referentes a las tradiciones de acumulación y conservación de patrimonios
Resumo:
Algunos escritores exiliados a partir de la última dictadura militar argentina (1976-1983) tradujeron ellos mismos sus textos para publicarlos en el país de exilio. Un ejemplo es el de Alicia Partnoy, autora de The Little School. Tales of Disappearance & Survival in Argentina, quien habiendo escrito un testimonio en español sobre su paso por el campo de concentración La Escuelita, ubicado en Bahía Blanca, se dedicó a traducirlo al inglés para su publicación en Estados Unidos en 1986. Sus numerosas ediciones, primero en el extranjero y más tarde en Argentina, lo ubican entre una de las obras más importantes de la narrativa testimonial concentracionaria argentina. Una forma de abordarlo reside en el análisis sobre el proceso y el resultado de la autotraducción, lo cual permite aportar elementos de reflexión acerca de la necesidad de los supervivientes exiliados de dar a conocer su experiencia en el exilio, algo que sobrepasa, incluso, las barreras lingüísticas
Resumo:
A mediados del siglo XVIII los grandes comerciantes de distintos espacios hispanoamericanos, acumulan suficientes caudales que les permiten comprar títulos de nobleza, distinciones o formar mayorazgos que relumbren sus nombres y perpetúen sus bienes adquiridos. Este proceso es mayormente evidente en los espacios mexicanos y peruanos; pero no se conocen casos concretos para el espacio rioplatense. Como planteó José Torre Revello, esto no implica que los comerciantes rioplatenses no intentasen ennoblecerse. El presente estudio de caso detalla como Don Vicente de Azcuénaga intenta fundar un mayorazgo en la ciudad de Buenos Aires a favor de su primogénito Miguel. A través de este estudio basado en las "probanzas" se puede observar como la familia Azcuénaga pretende resaltar su nombre frente al resto de sus contemporáneos, pero las relaciones entre padre e hijo nos conducen a la vez a replantearnos interrogantes referentes a las tradiciones de acumulación y conservación de patrimonios
Resumo:
Algunos escritores exiliados a partir de la última dictadura militar argentina (1976-1983) tradujeron ellos mismos sus textos para publicarlos en el país de exilio. Un ejemplo es el de Alicia Partnoy, autora de The Little School. Tales of Disappearance & Survival in Argentina, quien habiendo escrito un testimonio en español sobre su paso por el campo de concentración La Escuelita, ubicado en Bahía Blanca, se dedicó a traducirlo al inglés para su publicación en Estados Unidos en 1986. Sus numerosas ediciones, primero en el extranjero y más tarde en Argentina, lo ubican entre una de las obras más importantes de la narrativa testimonial concentracionaria argentina. Una forma de abordarlo reside en el análisis sobre el proceso y el resultado de la autotraducción, lo cual permite aportar elementos de reflexión acerca de la necesidad de los supervivientes exiliados de dar a conocer su experiencia en el exilio, algo que sobrepasa, incluso, las barreras lingüísticas
Resumo:
The ant Oecophylla longinoda Latreille forms a trophobiotic relationship with the invasive mealybug Rastrococus iceryoides Green and promotes the latter's infestations to unacceptable levels in the presence of their natural enemies. In this regard, the antagonistic interactions between the ant and the parasitoid Anagyrus pseudococci Girault were assessed under laboratory conditions. The percentage of parasitism of R. iceryoides by A. pseudococci was significantly higher on "ant-excluded" treatments (86.6% ± 1.27%) compared to "ant-tended" treatments (51.4% ± 4.13%). The low female-biased sex-ratio observed in the "ant-tended" treatment can be attributed to ants' interference during the oviposition phase, which disrupted parasitoids' ability to fertilize eggs. The mean foraging time, host handling time and number of successful oviposition in "ant-excluded" treatment were significantly higher compared to "ant-tended" treatments. When ant workers were allowed access to sterilized sand grains, mummified and unmummified R. iceryoides, they selectively removed the mummified mealybugs, indicating that they recognized the mummies as potential foods (1.2 ± 0.46 to 7.8 ± 1.17 mummies at 10 min intervals for 2 h). Percentage emergence from mummified R. iceryoides removed by the ants was significantly lower compared to emergence from mummies not exposed to ants. Although, host seeking parasitoids frequently evaded attacks, some were killed by the foraging ant workers (2.0 ± 0.38 to 6.0 ± 0.88 at 10 min intervals for 2 h). These results suggest for the first time that the presence of O. longinoda has a detrimental effect on the abundance, reproductive success and possibly oviposition strategy of female parasitoids, which might be a delimiting factor in field conditions if both natural enemies are to be recommended for use within the same agro-ecosystem.
Resumo:
The spatial and temporal patterns of fog and low clouds along the South-Western African coast are characterized based on an evaluation of Meteosat SEVIRI satellite data. A technique for the detection of fog/low clouds in the region is introduced, and validated using 1 year of CALIOP cloud lidar products, showing reliable performance. The frequency of fog and low cloud in the study area is analyzed by systematic application of the technique to all available Meteosat SEVIRI scenes from 2004 to 2009, for 7:00 UTC and 14:00 UTC. The highest frequencies are encountered in the area around Walvis Bay, with a peak in the summer months. Fog and low clouds clear by 14:00 UTC almost everywhere over land.
Resumo:
A mediados del siglo XVIII los grandes comerciantes de distintos espacios hispanoamericanos, acumulan suficientes caudales que les permiten comprar títulos de nobleza, distinciones o formar mayorazgos que relumbren sus nombres y perpetúen sus bienes adquiridos. Este proceso es mayormente evidente en los espacios mexicanos y peruanos; pero no se conocen casos concretos para el espacio rioplatense. Como planteó José Torre Revello, esto no implica que los comerciantes rioplatenses no intentasen ennoblecerse. El presente estudio de caso detalla como Don Vicente de Azcuénaga intenta fundar un mayorazgo en la ciudad de Buenos Aires a favor de su primogénito Miguel. A través de este estudio basado en las "probanzas" se puede observar como la familia Azcuénaga pretende resaltar su nombre frente al resto de sus contemporáneos, pero las relaciones entre padre e hijo nos conducen a la vez a replantearnos interrogantes referentes a las tradiciones de acumulación y conservación de patrimonios
Resumo:
Algunos escritores exiliados a partir de la última dictadura militar argentina (1976-1983) tradujeron ellos mismos sus textos para publicarlos en el país de exilio. Un ejemplo es el de Alicia Partnoy, autora de The Little School. Tales of Disappearance & Survival in Argentina, quien habiendo escrito un testimonio en español sobre su paso por el campo de concentración La Escuelita, ubicado en Bahía Blanca, se dedicó a traducirlo al inglés para su publicación en Estados Unidos en 1986. Sus numerosas ediciones, primero en el extranjero y más tarde en Argentina, lo ubican entre una de las obras más importantes de la narrativa testimonial concentracionaria argentina. Una forma de abordarlo reside en el análisis sobre el proceso y el resultado de la autotraducción, lo cual permite aportar elementos de reflexión acerca de la necesidad de los supervivientes exiliados de dar a conocer su experiencia en el exilio, algo que sobrepasa, incluso, las barreras lingüísticas