Chromite chemistry in SNC meteorites

We present the results of new EPMA studies of chromite in primitive basaltic shergottites (SAU005, EETA7001A, DAG476) and ALH84001 and Chassigny. Chromite grains from basic and ultrabasic rocks are sensitive indicators of melt compositions and the Fe3+-Cr-Al compositions of the cores can help to distinguish between partial melting and crystal-melt fractionation histories in the SNC 30 Fe3+ Chromite grains parent melts

UV and Visible Wavelength Reflectance Spectroscopy of Aerogel and of Stardust Grains

A new UV and visible reflectance microspectroscopy technique has been applied to cometary samples from the Stardust mission. The results have been compared with terrestrial minerals and aerogel

A two year follow-up study of mothers seen in a child guidance setting

Thesis (M.S.)--Boston Universit

Energetics Across Ecological Scales

Energy is a common currency of ecological interactions. In this dissertation, I consider ecological energetics at different temporal, spatial and organizational scales. In my first chapter, I examine the energetics and thermoregulation of an enigmatic taxon: dinosaurs. From fossil evidence and assessment of living vertebrates I conclude that many non-avian dinosaurs were likely thermally intermediate, or \u27mesothermic\u27. In my second chapter I detail the empirical evidence gathered to buttress my claim of dinosaur mesothermy. In my third chapter, I show how ecosystem rates of carbon flux, gross primary production and total biomass can be linked to individual body size. In my fourth and final chapter I explore how differences in metabolism and thermoregulation lead to predictable difference in marine predator biogeography, diversity and food consumption at ecosystem scales. A focus on organismal energetics offers insight into ecological interactions across space and time

FPGA-Based CNN Inference Accelerator Synthesized from Multi-Threaded C Software

A deep-learning inference accelerator is synthesized from a C-language software program parallelized with Pthreads. The software implementation uses the well-known producer/consumer model with parallel threads interconnected by FIFO queues. The LegUp high-level synthesis (HLS) tool synthesizes threads into parallel FPGA hardware, translating software parallelism into spatial parallelism. A complete system is generated where convolution, pooling and padding are realized in the synthesized accelerator, with remaining tasks executing on an embedded ARM processor. The accelerator incorporates reduced precision, and a novel approach for zero-weight-skipping in convolution. On a mid-sized Intel Arria 10 SoC FPGA, peak performance on VGG-16 is 138 effective GOPS

Chemistry and valency spectra of Chromite in SNC meteorites

Shergottite chromite core mantle sources were Al-poor, Fe-rich, low Fe^{3+}/Fe^{2+}, fO_{2} 1 to 4 unit