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National Cooperative Highway Research Program (NCHRP) Report 796: Development and Calibration of AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals provides specifications for str...
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National Cooperative Highway Research Program (NCHRP) Report 796: Development and Calibration of AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals provides specifications for structural supports of highway signs, luminaires, and traffic signals for consideration and inclusion in the American Association of State Highway and Transportation Officials (AASHTO) load and resistance factor design (LRFD) methodology. The report includes the Research Report, which documents the entire research effort, and the Appendix A: Calibration Report. Appendix B: AASHTO LRFD Specifications will be published by AASHTO.
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The present article describes research in progress which is developing a simple, replicable methodology aimed at identifying the regularities and specificity of human behavior in conflict escalation and de- escalation processes. T...
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The present article describes research in progress which is developing a simple, replicable methodology aimed at identifying the regularities and specificity of human behavior in conflict escalation and de- escalation processes. These research efforts will ultimately be used to study conflict dynamics across cultures. The experimental data collected through this methodology, together with case-studies, and aggregated, time-series macro data are key for identifying relevant parameters, systems' properties, and micromechanisms defining the behavior of naturally occurring conflict escalation and de-escalation dynamics. This, in turn, is critical for the development of realistic, empirically supported computational models. The article outlines the theoretical assumptions of Dynamical Systems Theory with regard to conflict dynamics, with an emphasis on the process of conflict escalation and de-escalation. Next, work on a methodology for the empirical study of escalation processes from a DST perspective is outlined. Specifically, the development of a progressive scenario methodology designed to map escalation sequences, together with an example of a preliminary study based on the proposed research paradigm, is presented. Implications of the approach for the study of culture are discussed.
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This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The goal of this project was to apply neutron reflectometry and atomic force micro...
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This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The goal of this project was to apply neutron reflectometry and atomic force microscopy to the study of lipid membranes containing proteins. Standard sample preparation techniques were used to produce thin films of these materials appropriate for these techniques. However, these films were not stable, and a new sample preparation technique was required. Toward this goal, the authors have developed a new capability to produce large, freely suspended films of lipid multi-bilayers appropriate for these studies. This system includes a controlled temperature/humidity oven in which the films 5-cm x 5-cm are remotely drawn. The first neutron scattering experiments were then performed using this oven.
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Hot CO sub 2 was used to check theoretical understanding by using one-nanosecond pulses. The results reported are in relatively good agreement with theory. The experimental setup consisted of a one nanosecond duration 1/2 millijou...
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Hot CO sub 2 was used to check theoretical understanding by using one-nanosecond pulses. The results reported are in relatively good agreement with theory. The experimental setup consisted of a one nanosecond duration 1/2 millijoule switched-out pulse directed through two heated pyrex cells filled with CO sub 2 and fitted with NaCl windows at Brewster's angle. The cells were 190 cm long of which 160 cm were heated to 300 +- 10 exp 0 C for a total heated path of 320 cm. Results are shown. They verify previous knowledge that hot CO sub 2 operating as a linear filter is not for one nanosecond systems, i.e., good baseline rejection and lack of ringing are incompatible for one nanosecond pulse durations. Some preliminary data are given on an attempt to compress a one nanosecond switched-out pulse by a factor of 6 by saturating SF sub 6 in a short cell. (ERA citation 02:023097)
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