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MEMS-Based Optical Limiter

Protecting optical sensors and detectors against excessive input signals is not only important for dealing with unintentional overloads, but also central for protecting sensors against intentional high-intensity sources such as flares or laser beams directed as countermeasures against the sensor system. In prior work, a microelectromechanical system (MEMS)-based, all optically driven deformable mirror was designed and fabricated. In this work, an optical limiter using this optically addressed, deformable mirror is proposed and designed.

Posted in: Briefs, Physical Sciences, Mirrors, Microelectricmechanical device, Optics, Sensors and actuators
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Reducing Thicknesses of PbZrₓTi₁₋ₓO₃ Films in Capacitors

A document describes experiments performed to determine effects of reducing the thicknesses of films of lead zirconate titanate (PbZrxTi1-xO3, wherein 0<x<1) used as ferroelectric dielectric layers in some capacitors. The fabrication of specimen capacitors for the experiments involved numerous steps, including spin-coating of PbZrxTi1-xO3-precursor sol-gel solutions onto bottom Pt electrode layers on silicon substrates, heat treatments to covert the sol-gel coats to PbZrxTi1-xO3, and deposition of top Pt electrode layers on the PbZrxTi1-xO3 layers. Various spin rates and solution compositions were used to obtain various PbZrxTi1-xO3- film thicknesses and compositions. Current responses of specimens to applied voltage waveforms were measured to characterize the specimens in terms of capacitance, hysteresis, and polarization. It was concluded that thicknesses of PbZrxTi1-xO3 films could be reduced to between 1,800 and 2,200 A while retaining ferroelectric performance adequate for a proposed development in which nanoelectromechanical switches containing PbZrxTi1-xO3 films would be integrated with complementary metal oxide/semiconductor transistors. One of the sol-gel solutions, characterized by x = 0.45 and a molarity of 0.367, was found to be the most promising for further work to improve performance at thicknesses < 1,800 A.

Posted in: Briefs, Physical Sciences, Capacitors, Transistors, Fabrication, Ferrous metals and alloys, Silicon alloys
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Virtual Network Computing Software for DataWall Remote Display

VNC (Virtual Network Computing) is open-source software that allows a user to view and interact with a remote computer (known as the VNC server) from a local computer (known as the VNC viewer/client). VNC is used to display multiple remote desktops on the DataWall. The original VNC software can only project the whole desktop from a server to the DataWall. The VNC server and viewer were modified to project the whole desktop or an application of interest from a server to the DataWall.

Posted in: Briefs, Software, Computer software / hardware, Data exchange, Human machine interface (HMI), Displays
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Software Suite for a Large Defense System

A suite of software tools was developed to enable networks composed of many hundreds, thousands, or even millions of commodity computers to protect themselves against a variety of security threats. These tools include Anagram, a content-based anomaly detection (AD) tool; ASSURE, which provides automatic software self-healing; and Aeolos, a distributed intrusion detection and event correlation infrastructure.

Posted in: Briefs, Software, Computer software / hardware, Cyber security, Neural networks
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VMEbus Processing Blade

Emerson Network Power (Tempe, AZ) has released the MVME4100 single-core, next-generation VMEbus processing blade that is suitable for industrial, medical, and defense/aerospace original equipment manufacturers. The VMEbus computing blades provide backwards compatibility to protect investments in existing VMEbus technologies. The MVME4100's 8548E system-on-chip PowerPC 1.3 GHz processor features a double-precision embedded scalar and vector floating-point APU that delivers next-generation, floating-point processing performance.

Posted in: Products, Products, Electronics & Computers
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AC/DC Switching Power Supply

The EPM-FPS-50 module from VersaLogic Corp. (Eugene, OR) is an effective method for supplying power to PC/104-type systems, including PC/104, PC/104-Plus, EBX, and EPIC platforms. The AC/DC switching power supply operates from clean or noisy power inputs between 8 and 40 Volts AC or DC. This allows the use of inexpensive Class 2 power wiring in many applications. With a conservative 50 watt continuous power output rating, the rugged design is ideal for high reliability embedded applications in transportation, medical, defense, autonomous robotics, and portable instrumentation.

Posted in: Products, Products, Electronics & Computers
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Touch Screen Panel PC

VIA Technologies, Inc. (Taipei, Taiwan) has introduced the VIA VIPRO VP7710 touch screen panel PC, a fullfeatured, fanless panel PC suitable for intelligent display applications in demanding environments. The VIA VIPRO is a costeffective, intelligent display that can handle commercial applications such as ticketing, ATM, vending, and information kiosks as well as sophisticated fleet deployment infrastructures in transport, delivery, and logistics enterprises. The VIA VIPRO is highly suited for human-machine interface (HMI) industrial applications such as factory automation and control, supporting the addition of a second independently configured screen for dual-display applications.

Posted in: Products, Products, Electronics & Computers
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Single-Board RIO

National Instruments (Austin, TX) now offers NI Single- Board RIO devices for deploying embedded control and data acquisition applications. The eight sbRIO- 96xx devices combine an embedded real-time processor, reconfigurable field-protgrammable gate array (FPGA), and analog and digital I/O on a single printed circuit board (PCB). They are suitable for applications that require flexibility, high performance, and reliability in a small form factor.

Posted in: Products, Products, Electronics & Computers
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High-Speed Development Tool

The MPLAB® ICD 3 from Micro - chip Technology Inc. (Chandler, AZ) is a cost-effective, high-speed development tool that supports in-circuit programming and debugging of Microchip's Flash-based 8-bit PIC® microcontrollers (MCUs), 16- and 32- bit MCUs, and 16-bit dsPIC® Digital Signal Controllers (DSCs). With robust system capabilities and high-speed circuitry, the MPLAB ICD 3 offers full compatibility with the MPLAB In - tegrated Develop ment En vironment (IDE), and exceptional programming speed and reliability. The MPLAB ICD 3 can easily connect to target boards for quick device programming.

Posted in: Products, Products, Electronics & Computers
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Wireless Ethernet Port Adapters

Based either on Bluetooth or Wireless LAN 802.11 technology, the Rugged Ethernet Port Adapters from connectBlue (Chicago, IL) are well suited for all Ethernet-based devices and systems in need of wireless connectivity. The products improve wireless coexistence without damaging the Bluetooth conformity or the interoperability with other devices. Built-in antennas use a unique radiation pattern. The products optimize the installation process and lower installation costs in demanding applications.

Posted in: Products, Products, Electronics & Computers
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