DPP-PMRF: Rethinking Optimization for a Probabilistic Graphical Model Using Data-Parallel Primitives

We present a new parallel algorithm for probabilistic graphical model optimization. The algorithm relies on data-parallel primitives (DPPs), which provide portable performance over hardware architecture. We evaluate results on CPUs and GPUs for an image segmentation problem. Compared to a serial baseline, we observe runtime speedups of up to 13X (CPU) and 44X (GPU). We also compare our performance to a reference, OpenMP-based algorithm, and find speedups of up to 7X (CPU).Comment: LDAV 2018, October 201

Displacement Response of the Spine in Restrained PMHS during Frontal Impacts

Efforts to improve restraint design for occupant protection require a detailed knowledge of human kinematic response including that of the spine. This study presents the spinal displacement response of eight PMHS subjected to a simulated 40 km/h frontal collision. The eight PMHS that approximated 50th percentile stature and mass were restrained by a three-point belt. During the tests a motion capture system was used to obtain the 3D displacements of the head, T1, T8, L2, L4, and pelvis relative to the vehicle coordinate system. The results will be immediately useful for kinematic biofidelity assessments of both ATDs and computational models

Development of an Alternative Frontal Impact Condition to Assess Thoracic Response Using the THOR Mod Kit Dummy

In the course of developing an alternative test condition to explore torso response, the NHTSA’s THOR Mod Kit Dummy was evaluated in two simulated frontal impact conditions. The recently proposed condition, which is less severe, produced less shoulder belt tension resulting in lower chest deflection. It also produced differences in the pattern of anterior ribcage deflection. The results of this study suggest that this less severe frontal impact test condition will produce sufficiently different PMHS response relative to that recorded in previous PMHS tests, including fewer rib fractures as well as an altered pattern of anterior ribcage loading