Solar-Sail Navigation: Estimation of Force, Moments, and Optical Parameters

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77367/1/AIAA-24340-772.pd

Evaluation of

The use of software in the educational system has significantly improve the process of learning of the students. Today most schools adopt their curriculum model using software; oriented application that educational improvements and bonding of the technological world with education. In this article the JAWS tool is evaluated at the Basic Education School Specialized Blind and Deaf of Machala city, in which we will present the educational contribution that has provided the JAWS software, Job Access With Speech to students with disabilities visual. The research was conducted within the framework of a quantitative study, obtaining data through surveys and the application of standard ISO/IEC 9126 quality based on the characteristics of software USAbility. The result of the research showed that students have improved their skills by using this system

Time Delays in the Synchronization of Chaotic Coupled Systems with Feedback

The synchronized excitable behavior of two coupled chaotic diode lasers with feedback was experimental and numerically studied. We determine the relation between the observed delay times in synchronized Low Frequency Fluctuation spikes and the coupling and the feedback times in the lasers.Comment: 5 pages, 6 figure

A process centred virtual approach to support cost estimating along product life cycle

The application of engineering practices and scientific principles to the creation of cost estimates along a product life cycle is one of the basic aspects of Cost Engineering. Cost estimates are used as fundamental criteria to make design decisions in the development stage and also to make business decisions in collaboration between OEMs and their supply chain. The achievement of an estimate requires experience and knowledge of different techniques and methodologies. Key aspects on its creation are the adoption of a cost estimating process, the availability of the needed data and the proper management of the information used during the process. The collaboration between the OEM and its supplier can be facilitated by having a better common understanding of how the cost estimates have been created. The cost estimating process used is then a fundamental piece of trust. In this context, the main purpose of this paper is to present the research conducted in the definition of cost estimating processes and the virtual framework selected. They are the key elements in the development of a prototype set of virtual tools to support the creation of cost estimates, the improvement of competences of the Cost Engineering Community, and the common understanding on cost between OEMs and their supply chain