Analog filtering methods improve leading edge timing performance of multiplexed SiPMs

Timing Discriminator Uses Leading - Edge Extrapolation "

A discriminator circuit uses dual current sources charging a capacitor to produce an output timing edge a fixed time after the starting corner of the input pulse, nearly independent of risetime and threshold setting. Performance with artificial and real pulses in the microsecond range is described. Background Obtaining a good timing information from slow-rising pulses is an old problem in pulse...

Leading-Edge Techniques and Optimal Performance

Leading Edge Vortices

Leading-edge vortices that form at offdesign conditions can profoundly influence the aerodynamic characteristics of highly swept slender wings. predict wing geometry effects on the progressive spanwise development of leading-edge vortices is presented. This method, which can account for sweep, camber, twist, airfoil shape, flap deflections, and planform shape, is shown to be a useful tool for a...

Novel Boosting Frameworks to Improve the Performance of Collaborative Filtering

Recommender systems are often based on collaborative filtering. Previous researches on collaborative filtering mainly focus on one single recommender or formulating hybrid with different approaches. In consideration of the problems of sparsity, recommender error rate, sample weight update, and potential, we adapt AdaBoost and propose two novel boosting frameworks for collaborative filtering. Ea...

Analog electro-optical readout of SiPMs for compact, low power ToF PET/MRI

Department of Radiology, Stanford University, Stanford, CA 94305, USA The aim of this work is to demonstrate time of flight (ToF) performance from analog electro-optical transmission of SiPM-based PET detector signals. In electro-optical readout schemes, scintillation signals are converted to near-infrared light by a laser diode and transmitted out of the MRI bore with fiber-optics [1], greatly...