Technological advances for studying human behavior

Technological advances for studying human behavior are noted in viewgraph form. It is asserted that performance-aiding systems are proliferating without a fundamental understanding of how they would interact with the humans who must control them. Two views of automation research, the hardware view and the human-centered view, are listed. Other viewgraphs give information on vital elements for human-centered research, a continuum of the research process, available technologies, new technologies for persistent problems, a sample research infrastructure, the need for metrics, and examples of data-link technology

Effect of Various Treatments and Additives on Wood-Portland Cement-Water Systems

In this study, a series of treatments were considered to determine the impact of such treatments on wood-cement compatibility. These treatments included hot water extraction of water-soluble components in wood, and/or chemical additives. The species involved included lodgepole pine and western larch. The latter species, in a prior study, proved to be highly inhibitory in a series of hydration tests. The data presented in this paper show that substantial improvements in cement setting can be achieved by the removal of water-soluble extractives and sugars in western larch. Such improvements, however, did not take place in lodgepole pine, which data show is far less inhibitory than larch in the untreated state. The addition of chemical additives, especially calcium chloride, appears to enhance compatibility in cement-wood-water mixes

Optical Carrier-Wave Subcycle Structures Associated with Supercritical Collapse of Long-Wavelength Intense Pulses Propagating in Weakly Anomalously Dispersive Media

We predict the emergence of attosecond-duration structures on an optical carrier wave when intense, long-wavelength pulses propagate through bulk media with weak anomalous dispersion. Under certain conditions, these structures can undergo a new type of carrier-resolved supercritical collapse, forming infinite spatiotemporal gradients in the field. The mathematical conditions for the onset of this singularity are briefly overviewed, and we demonstrate with a full 3D + time (3 + 1) simulation that such structures persist under realistic conditions for a 10 micron laser pulse propagating in air.This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

Bidirectional shooting method for extreme nonlinear optics

In this paper we introduce a pseudospectral shooting method to model intense, ultrashort optical pulses incident on remote targets. The method naturally extends the unidirectional pulse propagation equation to include backward propagating radiation due to either nonlinear coupling with the “forward” field or reflections generated at material boundaries. The general applicability of the method is highlighted with several examples, including a full simulation of a pulse propagating through air across an ultrathin gold film coated on fused silica.United States Department of Defense, Air Force Office of Scientific Research (AFOSR) [FA9550-19-1-0032]This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]