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Summaries of Columns A Safety Critical Network for Distributed Smart Traffic Signals For the past two years, researchers at the University of Idaho’s National Institute for Advanced Transportation Technology have been developing a method for more efficient traffic control called “Smart Signals”. This method employs multiple microprocessors connected by an Ethernet, allowing for more advanced activity and security within an intersection than what is currently offered by central traffic controllers. Among the advantages Smart Signals provides are faster fault-detection, cheaper hardware requirements, greater precision, and smaller space occupancy. Furthermore, Smart Signals caters to overall better safety management by providing drivers and pedestrians with accurate and timely information, and by detecting special needs by intersection occupants. For example, a person may require more time to cross an intersection that typically allotted. This would be picked up by the microprocessors and communicated to the overall network to allow more time for the pedestrian – a feature only Smart Signals can offer. MICROWAVE MEASUREMENTS – Part III Valeria Teppati, Andrea Ferrero, Vittorio Camarchia, As the latest publication of a series on microwaves and measurements, Part III offers two approaches aiding in power amplifier design and transistor modeling. “The first technique is the multi-tone/complex modulation load-pull. It is useful especially for wireless applications, where conventional single tone excitations do not give sufficient information for model and design development. The measurement conditions would be too far from the typical working ones. The second measurement technique is the time-domain waveform load-pull. Its applications span from highly accurate and reliable device model extraction to monitoring of actual operating conditions and ‘waveform engineering’ for high performance design… These techniques provide designers with important insights at the amplifier level and give the necessary device-level information for the development of devices with enhanced performances.” Tutorial 12: An Extension to Outputs and Actuators “This is an addendum to the fine tutorial by de Silva and Wang that published last February [1]. De Silva and Wang’s tutorial introduced the basic types of outputs, covering several important cases of mechatronics and displays. This tutorial addendum details some concerns with several of those actuators and outputs, focusing on real-time systems found in instrumentation because they run many different devices, types of equipment, and vehicles.” A few key focuses include motor speed control, maximum power transfer, nonlinear resistance, and more.
Tutorial 17: Control Theory, Part III “In this article, Shlomo Engelberg develops and describes five complementary methods of analyzing feedback systems with a single delay, and utilizes the different methods to provide insight into the general characteristics of the systems. These characteristics include the existence of an infinite number of closed-loop poles, the calculations of important quantities that characterize the system, and the response simulation of the system to important classes of inputs. By combining the information given by all of the methods, one is able to develop insight into, and intuition about, such systems. Finally, a simple application of the developed ideas is presented to demonstrate how a measurement strategy can affect the performance of a system.” Instrumentation Notes Bruno Andò, Alberto Ascia Advanced Learning Tools: From Real Needs to Useful Student Support Today’s technology is primarily used for advancing communication, whether for signal transmission to orbiting satellites, smart sensor technology, or for improving connection speeds and accuracy. In this article, technology is applied to a new spectrum of advanced communication – helping disabled persons battle their learning disabilities. Here, remote teaching and advanced monitoring tools are introduced which have the ability to adapt to the user’s special needs, including aid for the visually impaired. These tools work by monitoring needs, skills, and responses that might otherwise be masked by the user. Instrumentation Notes Distributed Measurement Systems – Continuing from the April 2008 publication on proprietary software benefits, Distributed Measurement Systems picks up with free and open source software solution. "For both parts.. two approaches [are presented]: a modern style web application and more classical programs. Despite clear differences, they share many common features including: database use, visualization style, and dividing the effort of data processing and visualization between server and client machines. [Part Two demonstrates how]… free and open source software such as the servers, libraries, and the whole platforms… are a great help and provide the opportunity to create a large measurement system in a relatively easy yet standardized way.” " [This publication proves] that the same objectives met with proprietary solutions can be achieved with FOSS, if not even better than with proprietary software.”
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