A Survey and Evaluation of High Energy Liquid Chemical Propulsion Systems

This report presents the results of a study to develop a procedure for evaluating liquid propellants in order (a) to select the most appropriate propellant (from among those under development) for each of several applications on each of the various missions in the NASA program, or (b) to select new propellants (from among those being proposed) for initiation or continuation of research and development. The analysis begins with a consideration of requirements--either for the specific application or for the various classes of applications. The known characteristics of the propellant or propellants to be evaluated are then put into a convenient form for evaluation. The next step is to determine whether or not there are requirements that simply cannot be met by the propellant. If the propellant passes this test, an optimum vehicle configuration using the propellant (and meeting all requirements) is estimated. (The configuration should be optimized with respect to the total resource consumption for all aspects of the mission, including R&D, production, logistics, and operation.) The total resource consumption for this configuration is then compared with that for similar configurations using other propellants (and meeting all requirements equally well). If all factors have been properly taken into account, this comparison of resource consumption will complete the evaluation. Such an evaluation may be performed several times, in increasing detail and with correspondingly increasing accuracy, as an R&D program proceeds, and the accuracy of the data as well as the cost of the next step in the program increase. The procedure is superior to those in common use in that it minimizes both the amount of analytical work and the number of points at which subjective value judgments are made

Preliminary evaluation of infrared and radar imagery, Washington and Oregon coasts

Airborne infrared and radar photography of Oregon and Washington coastal region

Crime prevention through environmental design: An analysis of the Boulevard Mall

Many case studies have been published that report a decrease in crime as a result of Crime Prevention Through Environmental Design (CPTED). Although methodologies and results of some studies have been questioned, there is agreement that the designed environment can influence human behavior. Data in this study were accumulated by the investigation of a local mall. Mall management and head of security reported a decrease in all types of crime after improving and adding security measures for customers and store employees. My hypothesis was the mall provided a high number of CPTED features which would result in a low number of police calls for service. Police calls for service from 1995 through 1997 and CPTED elements were analyzed. Results indicated a decrease in the number of police calls for service at the mall. The conclusions was that customers and store employees at the mall feel safer due to added and improved CPTED-like features

Creative Artificial Intelligence: Generation of New Objects

This paper presents an introduction to Artificial Intelligence and creativity. Creativity is analyzed from a biological point of view based on the concept of neuroplasticity of the human brain. It seeks to understand the process associated with the creative act to formalize it. He analyzes biological neural networks not from the point of view of their topology, but from the process, they carry out during the creative process.The focus of attention is placed on the generation of new objects. It seeks to formalize the creative act to propose a model of creativity with the ultimate goal of building a Creative Artificial Intelligence. To understand this process, well-documented examples from real life were studied. From them, the creativity process is analyzed and deconstructed into basic elements to later formalize it.Throughout history, various authors have studied the creative act and this has given rise to different theories. The proposed model is analyzed taking into account traditional approaches, constituting a tool for technological improvement that will complement human creativity.Fil: Rivera, Selva Soledad. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; ArgentinaFil: Núñez Mc Leod, Jorge Eduardo. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Núñez Mac Leod, Noelia E.. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; Argentin

Creative Artificial Intelligence: Generation of New Objects

This paper presents an introduction to Artificial Intelligence and creativity. Creativity is analyzed from a biological point of view based on the concept of neuroplasticity of the human brain. It seeks to understand the process associated with the creative act to formalize it. He analyzes biological neural networks not from the point of view of their topology, but from the process, they carry out during the creative process.The focus of attention is placed on the generation of new objects. It seeks to formalize the creative act to propose a model of creativity with the ultimate goal of building a Creative Artificial Intelligence. To understand this process, well-documented examples from real life were studied. From them, the creativity process is analyzed and deconstructed into basic elements to later formalize it.Throughout history, various authors have studied the creative act and this has given rise to different theories. The proposed model is analyzed taking into account traditional approaches, constituting a tool for technological improvement that will complement human creativity.Fil: Rivera, Selva Soledad. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; ArgentinaFil: Núñez Mc Leod, Jorge Eduardo. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Núñez Mac Leod, Noelia E.. Universidad Nacional de Cuyo. Facultad de Ingenieria. Instituto de Capacitación Especial y Desarrollo de Ingeniería Asistida por Computadora; Argentin