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We demonstrate swept-source optical coherence tomography in real-time by high throughput digital Fresnel hologram rendering from optically-acquired interferograms with a high-speed camera. The interferogram stream is spatially rescaled with respect to wavelength to compensate for field-of-view dilation inherent to discrete Fresnel transformation. Holograms are calculated from an input stream of 16-bit, 1024-by-1024-pixel interferograms recorded at up to 512 frames per second with a digital camera. All calculations are performed by a NVIDIA TITAN Xp graphics card on single-precision floating-point complex-valued arrays (32-bit per quadrature). It allows sustained computation of 1024-by-1024-by-256-voxel volumes at 10 billion voxel/s, from which three perpendicular cuts are displayed in real-time at user-selected locations, up to 38 frames per second., 5 pages, 5 figs

Far from the vision of popular actors in the popular economy as reactionary and archaic, stubbornly resisting any move towards change, this book's overall aim is to contribute to a broadening and deepening of our understanding of the logic and socio-economic practices of those operating in the informal economy. It focuses on the vulnerabilities of these participants, resulting from high exposure to different risks combined with low social protection, and on the interactions between vulnerability and poverty. It considers security of livelihoods as the guiding principle for multiple practices in the informal economy. Thirteen studies, based on careful analyses of empirical data in different contexts in Africa, Latin America, and Asia, contribute to this multidisciplinary discussion. This book describes how people develop their own strategies to solve their problems through the use of interpersonal networks, associations, and other community-based arrangements. Moreover, it shows that informal economy actors systematically reposition themselves vis-à-vis the State, markets, international, and national policies with the aim of enhancing their economic and social security, and they may do this either individually or collectively. The book emphasizes how adaptability of the informal economy can be influenced by such factors as the macroeconomic context, access to financial, technological, and information resources, infrastructure, social protection schemes, and the institutional environment within which adaptations occur. The case studies stress the need to reformulate questions relating to policy intervention based on a more thorough understanding of the perspective of informal economy actors, practices, and institutions.

Pregnancy is a rare occurrence in patients on chronic hemodialysis (CHD). The rate of successful pregnancies amounts to almost 60%, thanks to modifications of the dialysis schedule and a specifically adapted obstetrical and neonatal management. We report on seven pregnancies occurring between 1995 and 2001 in six women with a mean age of 32 years (22-39 years), on HD for a mean period of 36 months (12-96 months). Maternal and fetal complications, and the long-term outcome of mothers and children are reported, and the collaborative approaches adopted by obstetrician, pediatrician and nephrologist are discussed. The frequency and length of HD was systematically increased. One patient chose to terminate her pregnancy at 20 weeks of gestation. The mean gestational age for the six other pregnancies was 31 weeks (24-34 weeks) with an average weight at birth of 1495 g (660-1920 g). One neonate born at 24 weeks died 2 days following delivery. One patient was treated with uterine artery embolization for post-partum haemorrhage. Pediatric evaluation of the five children, who were followed up for a period ranging between 2.5 to 5.5 years, showed a good long-term outcome. In conclusion, pregnancy needs not be counterindicated or systematically terminated in patients on CHD, particularly if transplantation is not possible, if the patient refuses it, or if she is relatively old and there is a long waiting period before transplantation.