Virtual blasting system for removal of coating and/or rust from a virtual surface

A computer simulation and virtual reality system simulates the use of a blasting nozzle to remove one or more coatings and/or rust from a virtual surface. The user operates an electronic controller in the form of a blasting nozzle that outputs a signal indicating whether the blasting nozzle controller is in an on position or in an off position. The system also has a motion tracking system that tracks the position and orientation of the blasting nozzle controller with respect to the virtual surface defined on the display screen. Simulation software in a computer generates virtual blast pattern data, and the removal of the virtual coating(s) and/or rust image from the virtual surface is displayed in real time on the display screen

Virtual coatings application system

A virtual coatings application system has several features to enhance the realism of simulated spray painting. The system generally includes a display screen on which is defined a virtual surface (such as a truck door) that is intended to be virtually painted or coated by the user. Alternatively, the system includes a head-mounted display unit that displays a virtual spray painting environment in which the virtual surface is defined. The user operates an instrumented spray gun controller that outputs one or more signals representing data as to the status of the controls on the spray gun controller. The system also has a motion tracking system that tracks the position and orientation of the spray gun controller with respect to the virtual surface. Simulation software generates virtual spray pattern data in response to at least the data from the spray gun controller and the position and orientation data received from the tracking system. Virtual spray pattern images are displayed in real time on the virtual surface in accordance with the accumulation of virtual spray pattern data at each location on the virtual surface

Virtual coatings application system

A virtual coatings application system has several features to enhance the realism of simulated spray painting. The system generally includes a display screen on which is defined a virtual surface (such as a truck door) that is intended to be virtually painted or coated by the user. The user operates an instrumented spray gun controller that outputs one or more signals representing data as to the status of the controls on the spray gun controller. The system also has a motion tracking system that tracks the position and orientation of the spray gun controller with respect to the virtual surface defined on the display screen. Simulation software generates virtual spray pattern data in response to at least the data from the spray gun controller and the position and orientation data received from the tracking system. Virtual spray pattern images are displayed in real time on the display screen in accordance with the accumulation of virtual spray pattern data at each location on the virtual surface

PEASANT RESPONSE TO STATE GRAIN POLICY IN POST-REVOLUTIONARY NICARAGUA: 1979-1984 (DEVELOPMENT, CENTRAL, LATIN AMERICA)

Policies for peasant grain production and marketing and their results are inextricably linked to those for peasant class transformation. Nicaraguan state intervention in peasant grain production during the first five years of the Nicaraguan revolution is analyzed using class-based peasant categories. Grain policies and results are derived, first, from the pre-revolutionary historical and class basis of peasant grain production, and second, from the FSLN\u27s changing policies and goals for both peasant transformation and grain production and marketing. Strengths and weaknesses within each component of the peasant grain program and response by members of each peasant category to state policy are evaluated, as are new state initiatives in 1984. It is concluded that Nicaraguan state intervention, via massive increases in peasant access to resources, contributed to national self-sufficiency in beans, some improvements in the economic conditions of poor and medium peasants, and the voluntary collectivization of a small but important segment of the peasantry. The problems of peasant grain production and marketing could not be overcome in their entirety, resulting in a deficit in marketed corn. Contributing factors included external and internal political, economic, and military pressures, as well as inadequate policy formulation on the part of the state. Distinct grain responses by peasant category imply that the peasantry cannot be treated as a homogeneous unit. The state is likely to achieve improved results once class has been taken into account. The dissertation argues that revolutionary transition confronts one of its most difficult problems in the tensions between peasant class transformation and macroeconomic goals. These problems are most likely to be resolved by a pragmatic, long-run policy of persuasion and example--as has been the case so far in Nicaragua