Steven Sloan

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We use neuromorphic chips to perform arbitrary mathematical computations for the first time. Static and dynamic computations are realized with heterogeneous spiking silicon neurons by programming their weighted connections. Using 4K neurons with 16M feed-forward or recurrent synaptic connections, formed by 256K local arbors, we communicate a scalar(More)
HYPOTHESIS Survival following massive transfusion in patients who have undergone trauma has improved during the past 10 years. DESIGN Retrospective cohort study. SETTING Academic level I trauma center in an urban community. PATIENTS All patients who underwent trauma and who received greater than 50 U of packed red blood cells or whole blood in the 48(More)
Elephantiasis nostras verrucosa represents an uncommon yet distinct clinical entity resulting from chronic lymphedema of an extremity or body region. Characterized by profound non-pitting edema with cobblestone-like papules, plaques, and nodules, it typically occurs secondary to infections, surgeries, tumor obstruction, radiation, congestive heart failure,(More)
OBJECTIVE AND STUDY DESIGN The purpose of this experimentation was to investigate the safety of a novel cooled bipolar radiofrequency system by examining histology and monitoring temperature distribution in the disc, epidural space, and adjacent to the nerve roots. In our study we used two human cadaver lumbar spines, one moderately to severely degenerated(More)
Geophysical detection of near-surface voids caused by mining, tunnels, karst features, etc., is a persistent problem that has not been solved either consistently or across multiple geologic settings. Multiple methods have been used with varying degrees of success. We present shallow seismic data collected at a test site with a 9.1-m deep tunnel in(More)
Injuries of the proximal tibial epiphysis are rare. They predominantly occur in adolescent males following, signfficant trauma. They usually involve a Salter Harris Type II, III or IV injury, and are associated with a high level of growth disturbance. We present the case of a twelve year old boy, who suffered a Type I proximal tibial epiphyseal injury. The(More)
Geophysical detection of clandestine tunnels is a complex problem that has met with limited success. Multiple methods have been applied, spanning several decades, but a reliable solution has yet to be found. We evaluated shallow seismic data collected at a tunnel test site representative of geologic settings found along the southwestern U.S. border. Our(More)
The use of dissolution wells for mining salt has been common practice for over a century, leaving behind brine-filled “salt jugs” or voids in the subsurface which, over time, can migrate through overlying rock formations, potentially leading to sinkhole formation and public safety hazards. In an effort to determine the relative range of stress on the roof(More)