Driver workload detection in on-road driving environment using machine learning

Drivers' high workload caused by distractions has become one of the major concerns for road safety. This paper presents a datadriven method using machine learning algorithms to detect high workload caused by surrogate in-vehicle (IV) secondary tasks performed in an on-road experiment with real traffic. The data were collected using an instrumented vehicle while drivers performed two types of secondary tasks: visual-manual and auditory-vocal tasks. Two types of machine learning methods, support vector machine (SVM) and extreme learning machine (ELM), were applied to detect drivers' workload via drivers' visual behaviour (i.e. eye movements) data alone, as well as visual plus driving performance data. The results suggested that both methods can detect drivers' workload at high accuracy, with ELM outperformed SVM in most cases. We found that for visual intensive workload, using drivers' visual data alone achieveed an accuracy close to using the combination information from both visual and driving performance data. This study proves that machine learning methods can be used for real driving applications

VECTOR MESON PRODUCTION BY POLARIZED PHOTONS AT 2.8, 4.7 AND 9.3 GeV

We present results on vector meson photoproduction via +yp-. Vp in the LBL-SLAC 82 ” hydrogen bubble chamber exposed to a linearly polarized photon beam at 2.8, 4.7 and 9.3 GeV. We find p ” production to have the characteristics of a diffractive process, i.e., a cross section decreasing slowly with energy and a differential cross section with slope of- 6.5 GeV-2. Within errors the p ” production amplitudes are entirely due to natural parity exchange. S-channel helicity is conserved to a high degree in the y--+p ’ transition. We find evidence for small helicity flip amplitudes for 7rr pairs in the,o ” region. Photoproduction of w mesons is separated into its natural (aN) and unnatural (vu) parity ex-change contributions. The E-Y and t-dependence and the spin density matrix of the unnatural parity exchange contribution are consistent with an OPE process. The natural parity exchange part has characteristics similar to p ” production

TOTAL AND PARTIAL yp CROSS SECTIONS AT 9.3 GeV*

We report yp total, topological, and channel cross sections at 9.3 GeV, from a bubble chamber experiment monoenergetic photon beam. using a nearly * Work supported by the U. S. Atomic Energy Commission and Nationa

Compilation of current high energy physics experiments - July 1976

A compilation of current high energy physics experiments is presented, including in the tables the various experimental parameters as well as the spokesmen and institutions. (JFP

Total and partial photoproduction cross sections at 1.44, 2.8, and 4.7 GeV

A nearly monochromatic high-energy photon beam produced by Compton backscattering of ruby laser light has been used to study photoproduction in a hydrogen bubble chamber. The total hadronic γp cross sections at 1.44, 2.8, and 4.7 GeV are found to be 145.1 ± 5.7, 131.3 ± 4.3, and 124.2 ± 3.9 μb, respectively. Partial cross sections are presented also. © 1969 The American Physical Society.SCOPUS: ar.jinfo:eu-repo/semantics/publishe