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Generic Miniature Airplane for Research and Development

The Air Force Research Laboratory has promulgated the geometrical design of a miniature airplane denoted the Generic Micro Aerial Vehicle (GENMAV). This design is intended to serve as a baseline for analyses of geometrical designs of other micro aerial vehicles (MAVs). As such, the GENMAV design is meant to be distributed openly among organizations engaged in research and development pertaining to MAVs. The need for the GENMAV or a similar standard of comparison has become more acute in recent years because of the increasing interest in the use of MAVs [a subset of uninhabited aerial vehicles (UAVs)] for diverse purposes, especially in military, law-enforcement, and rescue activities.

Posted in: Briefs, Mechanical Components
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Time Coding of Asynchronously Transmitted Multi-Source Data

A method of time coding of asynchronously transmitted data from multiple sources has been invented. The method is especially applicable to a data-acquisition and transfer system that operates in a standard asynchronous transfer mode (ATM), in which, at a transmitter, streams of data acquired simultaneously from multiple sources are time-multiplexed, packaged into cells that are sent sequentially over a single wide-band transmission line or other channel to a receiver. The packaging destroys the original temporal relationship among the data streams, but the method enables reconstruction of the data streams in their original temporal relationships at the receiver.

Posted in: Briefs, Electronics & Computers
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Quantum Network Testbed

A document describes the world’s first quantum network testbed — an Internet-compatible fiber-optic data-communication network that is kept extremely secure by use of encryption with quantum key distribution (QKD). The testbed, located in the Boston metropolitan area, includes ten nodes, of which four run continuously over commercial telecommunication fiber-optic links, four utilize free-space optical links, and two are based on propagation of polarization-entangled photon pairs in optical fibers. The document contains an introduction to quantum cryptography, including the basic concepts of, and the rationale for, QKD as implemented in the network. The document goes on to describe the architecture of the network and the design and operation of key systems, subsystems, and components. An important consideration affecting the designs of systems and subsystems is the need to formulate QKD algorithms to foil quantum eavesdropping.

Posted in: Briefs, Electronics & Computers
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Monitoring and Charging System for a High-Power Battery

Figure 1 is a simplified block diagram showing (1) a high-power rechargeable battery comprising multiple series-connected modules, each module containing multiple series-connected rechargeable cells, and (2) a system for monitoring battery voltages and controlling the charging of the battery. To ensure safe, reliable operation of the battery, it is imperative to ensure that the potentials and temperatures of all the cells remain within prescribed limits. Accordingly, the system monitors the potential of each cell, the overall potential of each module, and the temperature of each cell. Because overcharging can damage a cell, if the potential of any cell exceeds a predetermined maximum allowable level, the system interrupts the charging process and starts another process, called “equalization,” in which the affected cell is partially discharged through a resistor until its potential reaches a prescribed safe lower level. If the temperature of any cell or module exceeds a predetermined maximum allowable value, or if a fault is detected, the system stops the charging process.

Posted in: Briefs, Electronics & Computers
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Advances in Materials for Photonic Applications

Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio Aprogram of research has addressed multiple topics in the design, development, characterization, and utilization of new materials for photonic applications. These materials include compounds, solutions, and nanocomposites that exhibit diverse types of single- and multiple-photon activity. The accomplishments of this research can be grouped into four main categories and summarized as follows:

Posted in: Briefs, Photonics
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Compact Megawatt Infrared Free-Electron Laser Amplifier

A proposed high-gain free-electron laser (FEL) amplifier, conceived primarily for use in a maritime environment, would be capable of average output power of the order of a megawatt at one or more of several infrared wavelengths (1.045, 1.625, or 2.141 μm) for which propagation through air is minimally adversely affected by water vapor and aerosols. The conceptual design of this FEL amplifier provides for a combination of conventional and unconventional characteristics that, taken together, would be advantageous in the intended power and wavelength regime.

Posted in: Briefs, Photonics
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Dual-Core VME Single-Board Computer Delivers Low Voltage

Curtiss-Wright Controls Embedded Computing (Leesburg, VA) offers the SVME/DMV-1901 6U VME single-board computer with the Intel® Core™ Duo processor running at speeds of 1.67 and 2.0 GHz.

Posted in: Products, Products, Electronics & Computers
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PrXMC/PrPMC Module

The TPA-XMC™ PrXMC/PrPMC Module from Themis® Computer (Fremont, CA) provides dual 64-bit processing and flexible high-speed I/O while consuming as little as 15 watts. The energy-efficient module is based on P.A. Semi's PA6T-1682M PWRficient™ Power Architecture-based processor. The TPA-XMC is designed for a wide range of networking, wireless infrastructure, storage, and military/aerospace systems running applications on PowerPC platforms. Eighteen user-configurable serdes lanes enable the TPA-XMC to serve a wide range of high-speed requirements.

Posted in: Products, Products, Electronics & Computers
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IP Core Software for FPGA Chips

SERCOS International (Santa Rosa Beach, FL) has introduced Easy-I/O, a freely downloadable IP core software for low-cost FPGA chips that allows SERCOS III to be integrated into basic I/O slave devices with minimal development and integration effort. To minimize the costs for a slave interface, the functionality of a SERCOS III slave was reduced to a minimum. Thus, the Easy-I/O IP core supports only the SERCOS III realtime and service channels.

Posted in: Products, Products, Electronics & Computers
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SHB Express™ and PICMG® 1.3

Trenton Technology (Atlanta, GA) announces five new SHB Express™ and PICMG® 1.3 backplanes designed to meet the needs of a wide variety of fields including medical diagnostics, military, telecom, and advanced imaging markets. Trenton's BPG6615, BPX6610, BPG6714 and BPX6719 backplane configurations support additional PCIe, PCI-X and PCI card slots.

Posted in: Products, Products, Electronics & Computers
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