... predictions from the theoretical and numerical models can be compared against experimental data to calibrate the modeling input parameters. Such a feedback loop is more likely to engage practicing engineers and operational decision-makers who may dismiss theoretical or numerical studies alone. research...

... and development ceased and was not pursued for more than 20 years. research and development Cost analysis US government rapid excavation asset and portfolio management STPD operation propellant metals & mining projectile impact experiment blast method excavation muzzle blast smoothbore...

... research and development field test urban mass transportation administration strategic planning and management Demonstration concrete tunnel liner private sector Deployment strategy tunnel liner project management procedure technical activity precast concrete tunnel construction...