Indigenous Angolans and Global Trade in the Age of Abolition: 1797-1852

This study analyzes the Indigenous, unenslaved population of the Portuguese colony of Angola from 1797 to 1852 from an economic perspective. The outcome of the work is to see how financially connected the majority of Angolans were to the Portuguese colonial economic system and global trade in this period, as well as to determine the effects of global economic links on late modern Angolan life. The African contribution to global trade through the exportation of slaves is well known, though the economic relationship between this trade and Indigenous Africans can be difficult to determine. In Angola, a wealth of demographic data recorded in the colonial period helps understand the effects of global trade, abolitionism, and major political events on local communities. Coupled with trade records, colonial censuses illustrate the relative economic isolation experienced by Indigenous Angolans in the late 18th and early 19th centuries, despite protracted European interference in the region.Este trabalho analisa a população indígena e não escravizada da colónia portuguesa de Angola entre 1797 e 1852 do ponto de vista económico. O objetivo é determinar a medida em que a maioria dos angolanos estava ligada ao sistema financeiro português estabelecido na colónia e ao comércio global neste período. Pretende identificar os efeitos dos laços económicos globais na vida moderna angolana. A contribuição africana para o comércio global é bem conhecida através da exportação de escravos, embora a relação económica entre este comércio e as comunidades africanas indígenas seja difícil de determinar com certeza. Em Angola, uma quantidade impressionante de dados demográficos registrados no período colonial ajuda a compreender os impactos do comércio global, do abolicionismo e dos principais eventos políticos. Juntamente com os registros comerciais, os censos coloniais ilustram uma economia relativamente isolada e livre de pressões exteriores partilhada pelos indígenas angolanos no final do século XVIII e no início do século XIX, apesar da prolongada interferência europeia na região

The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III

The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. All of the data from SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all data acquired through 2013 July, and Data Release 12 (DR12) adding data acquired through 2014 July (including all data included in previous data releases), marking the end of SDSS-III observing. Relative to our previous public release (DR10), DR12 adds one million new spectra of galaxies and quasars from the Baryon Oscillation Spectroscopic Survey (BOSS) over an additional 3000 deg2 of sky, more than triples the number of H-band spectra of stars as part of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE), and includes repeated accurate radial velocity measurements of 5500 stars from the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS). The APOGEE outputs now include the measured abundances of 15 different elements for each star. In total, SDSS-III added 5200 deg2 of ugriz imaging; 155,520 spectra of 138,099 stars as part of the Sloan Exploration of Galactic Understanding and Evolution 2 (SEGUE-2) survey; 2,497,484 BOSS spectra of 1,372,737 galaxies, 294,512 quasars, and 247,216 stars over 9376 deg2; 618,080 APOGEE spectra of 156,593 stars; and 197,040 MARVELS spectra of 5513 stars. Since its first light in 1998, SDSS has imaged over 1/3 of the Celestial sphere in five bands and obtained over five million astronomical spectra. \ua9 2015. The American Astronomical Society

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements