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Rowasu'u is a digital archives project that seeks to reunite A'uwẽ-Xavante individuals with researcher produced documentation of their ancestors, families, bodies, culture, and homelands and eventually provide a platform for the collection and preservation of community knowledge. A'uwẽ-Xavante have a long history of receiving academic researchers including anthropologists, geneticists, biomedical researchers, ecologists, and linguists, but they have had limited access to the documentation and other data produced through these encounters. The Rowasu'u project is working with scholars to compile and make accessible records of more than 60 years of decentralized academic research while partnering with A'uwẽ-Xavante communities historically positioned as the most prominent participants. Our larger aspiration is that in addition to supporting A'uwẽ-Xavante efforts to reclaim their history as recorded by scientists, Rowasu'u will advance Indigenous research governance and data sovereignty as human rights applicable to past as well as future research. This chapter discusses our early progress in developing Rowasu'u using Mukurtu CMS, including the challenges and complexities inherent in navigating local politics in the context of generations of marginalization and exclusion. 

Abstract: Rowasu'u is a digital archives project that seeks to reunite A'uwẽ-Xavante individuals with researcher produced documentation of their ancestors, families, bodies, culture, and homelands and eventually provide a platform for the collection and preservation of community knowledge. A'uwẽ-Xavante have a long history of receiving academic researchers including anthropologists, geneticists, biomedical researchers, ecologists, and linguists, but they have had limited access to the documentation and other data produced through these encounters. The Rowasu'u project is working with scholars to compile and make accessible records of more than 60 years of decentralized academic research while partnering with A'uwẽ-Xavante communities historically positioned as the most prominent participants. Our larger aspiration is that in addition to supporting A'uwẽ-Xavante efforts to reclaim their history as recorded by scientists, Rowasu'u will advance Indigenous research governance and data sovereignty as human rights applicable to past as well as future research. This chapter discusses our early progress in developing Rowasu'u using Mukurtu CMS, including the challenges and complexities inherent in navigating local politics in the context of generations of marginalization and exclusion. 

We report single-shot, time-resolved observation of self-steepening and temporal splitting of near-infrared, 50 fs, micro-joule pulses propagating nonlinearly in flint (SF11) glass. A coherent, smooth-profiled, 60-nm-bandwidth probe pulse that propagated obliquely to the main pulse through the Kerr medium recorded a time sequence of longitudinal projections of the main pulse’s induced refractive index profile in the form of a phase-shift “streak,” in which frequency–domain interferometry recovered with ∼10 fs temporal resolution. A three-dimensional simulation based on a unidirectional pulse propagation equation reproduced observed pulse profiles. 

We visualize plasma bubbles driven by 0.67 PW laser pulses in a plasma of density ne≈5×1017cm−3 by imaging Faraday rotation patterns imprinted on linearly polarized probe pulses of wavelength λpr=1.05  μm and duration τpr=2 or 1 ps that cross the bubble's path at right angles. When the bubble captures and accelerates tens to hundreds of pC of electron charges, we observe two parallel streaks of length cτpr straddling the drive pulse propagation axis, separated by ∼45 μm, in which probe polarization rotates by 0.3° to more than 5° in opposite directions. Accompanying simulations show that they result from Faraday rotation within portions of dense bubble side walls that are pervaded by the azimuthal magnetic field of accelerating electrons during the probe transit across the bubble. Analysis of the width of the streaks shows that quasi-monoenergetic high-energy electrons and trailing lower energy electrons inside the bubble contribute distinguishable portions of the observed signals, and relativistic flow of sheath electrons suppresses Faraday rotation from the rear of the bubble. The results demonstrate favorable scaling of Faraday rotation diagnostics to 40× lower plasma density than previously demonstrated.