Diagnostic motor vehicle inspection demonstration projects, program engineering support. Volume 5 - appendix D: orientation seminars. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Diagnostic motor vehicle inspection demonstration projects, program engineering support. Volume 6 - appendix E: technical basis for cost benefit analyses. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Diagnostic motor vehicle inspection demonstration projects, program engineering support. Volume 7 - appendix F: fuel economy evaluation. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Diagnostic motor vehicle inspection demonstration projects, program engineering support. Volume 11 - appendix J: quality audit of diagnostic demonstration projects and repair agencies. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Program evaluation support for the motor vehicle diagnostic inspection demonstration projects. Volume II: costs and benefits. Final report.

National Highway Traffic Safety Administration, Office of State Vehicle Programs, Washington, D.C.

Program evaluation support for the motor vehicle diagnostic inspection demonstration projects. Volume III: Final evaluation report.

National Highway Traffic Safety Administration, Office of State Vehicle Programs, Washington, D.C.

Program evaluation support for the motor vehicle diagnostic inspection demonstration projects. Volume I: used car owner survey. Final report.

National Highway Traffic Safety Administration, Office of Sate Vehicle Programs, Washington D. C.

Ultrasonic inspection of ten retreaded tires and thirty-two casings. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Supervisory guidelines for motor vehicle inspection programs. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Diagnostic motor vehicle inspection demonstration projects, program engineering support. Volume 8 - appendix G: vehicle-in-use standards. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Motor vehicle diagnostic inspection demonstration program--summary report.

Mode of access: Internet.

Physical methods applicable to the detection of Trichinella spiralis in pork,

Mode of access: Internet.

A genetic investigation of the covariation among Inspection Time, Choice Reaction Time, and IQ subtest scores

Information processing speed, as measured by elementary cognitive tasks, is correlated with higher order cognitive ability so that increased speed relates to improved cognitive performance. The question of whether the genetic variation in Inspection Time (IT) and Choice Reaction Time (CRT) is associated with IQ through a unitary factor was addressed in this multivariate genetic study of IT, CRT, and IQ subtest scores. The sample included 184 MZ and 206 DZ twin pairs with a mean age of 16.2 years (range 15-18 years). They were administered a visual (pi-figure) IT task, a two-choice RT task, five computerized subtests of the Multidimensional Aptitude Battery, and the digit symbol substitution subtest from the WAIS-R. The data supported a factor model comprising a general, three group (verbal ability, visuospatial ability, broad speediness), and specific genetic factor structure, a shared environmental factor influencing all tests but IT, plus unique environmental factors that were largely specific to individual measures. The general genetic factor displayed factor loadings ranging between 0.35 and 0.66 for the IQ subtests, with IT and CRT loadings of -0.47 and -0.24, respectively. Results indicate that a unitary factor is insufficient to describe the entire relationship between cognitive speed measures and all IQ subtests, with independent genetic effects explaining further covariation between processing speed (especially CRT) and Digit Symbol.

The effect of auditory and visual distracters on the useful field of view: Implications for the driving task

PURPOSE. The driving environment is becoming increasingly complex, including both visual and auditory distractions within the in- vehicle and external driving environments. This study was designed to investigate the effect of visual and auditory distractions on a performance measure that has been shown to be related to driving safety, the useful field of view. METHODS. A laboratory study recorded the useful field of view in 28 young visually normal adults (mean 22.6 +/- 2.2 years). The useful field of view was measured in the presence and absence of visual distracters (of the same angular subtense as the target) and with three levels of auditory distraction (none, listening only, listening and responding). RESULTS. Central errors increased significantly (P < 0.05) in the presence of auditory but not visual distracters, while peripheral errors increased in the presence of both visual and auditory distracters. Peripheral errors increased with eccentricity and were greatest in the inferior region in the presence of distracters. CONCLUSIONS. Visual and auditory distracters reduce the extent of the useful field of view, and these effects are exacerbated in inferior and peripheral locations. This result has significant ramifications for road safety in an increasingly complex in-vehicle and driving environment.

Determinants of visual 2-D echo assessment of left ventricular wall motion: Comparison with myocardial thickening on cardiac magnetic resonance imaging

Background: left ventricular wall motion on 2d echo (2de) is usually scored visually. we sought to examine the determinants of visually assessed wall motion scoring on 2de by comparison with myocardial thickening quantified on MRI. Methods: using a 16 segment model, we studied 287 segments in 30 patients aged 61+/ -11 years (6 female), with ischaemic LV dysfunction (defined by at least 2 segments dysfunctional on 2de). 2de was performed in 5 views and wall motion scores (WMS) assigned: 1 (normal) 103 segments, 2 (hypokinetic) 93 segments, 3 (akinetic) 87 segments. MRI was used to measure end systolic wall thickness (ESWT), end diastolic wall thickness (EDWT) and percentage systolic wall thickening (SWT%) in the plane of the 2de and to assess WMS in the same planes visually. No patient had a clinical ischemic event between the tests. Results: visual assessment of wall motion by 2de and MRI showed moderate agreement (kappa = 0.425). Resting 2de wall motion correlated significantly (p