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Polypeptide-Based Molecular Electronics

Polypeptide supramolecules that will self assemble from solution and will form molecular wires that exploit quantum mechanical transport mechanisms can enable the formation of molecular devices such as transistors, diodes, and sensors. The peptides were designed and then arranged on substrates using self-assembly, Dip-PEN nanolithography, and e-beam assisted lithography. The peptides were characterized using atomic force microscopy (AFM) and the electrical properties of the self-assembled interconnects are characterized as well. These peptides can be nanoengineered/nanoassembled individual building blocks at the molecular level to form conducting channels towards realization of molecular MOSFETs/CMOS device technology.

Posted in: Briefs, Electronics & Computers, Sensors and actuators, Transistors, Additive manufacturing, Forming, Materials properties, Semiconductors
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Photon-Counting Chirped Amplitude Modulation Ladar

This work is a follow-on to an effort to develop a method using Geiger-mode avalanche photodiode (GM-APD) photon-counting detectors in the U.S. Army Research Laboratory’s chirped amplitude modulation (AM) ladar receiver to yield sensitivities approaching the shot noise limit. Such sensitivities represent about four orders of magnitude improvement over the sensitivities of the currently used unity-gain, optoelectronic mixing (OEM) metal-semiconductor-metal (MSM) detectors. A variant of the chirped AM ladar has been experimentally assembled and tested, and new single photon-counting detector products were evaluated in terms of their benefits to the chirped AM ladar.

Posted in: Briefs, Photonics, Measurements, Radar, Semiconductor devices, Product development, Military vehicles and equipment
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Measurement of Transient Heat Flux and Surface Temperature Using Embedded Temperature Sensors

A report describes approximate solutions for surface temperature and heat flux for two embedded temperature sensors. The solutions were verified and the range of validity was established using several methods including comparisons with an exact analytical solution for a linear problem and a numerical calculation for a non-linear problem.

Posted in: Briefs, Physical Sciences, Mathematical models, Sensors and actuators, Thermal testing
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Considerations of Aeroacoustics in Turbojet-Engine Testing

A study of the aeroacoustics of a turbojet-engine test cell has been performed as one step in the development of a computational aeroacoustics capability (CAA) that could provide guidance for the design and operation of such cells. Ground testing of turbojet engines in test cells necessarily involves very high acoustic amplitudes, often severe enough to cause damage to test-cell equipment and to engines under test. Heretofore, the acoustic responses of test cells containing energetic jets have been poorly understood and generally unpredictable. The CAA capability is intended to enable prediction of deleterious acoustic events, making it possible to design test cells and choose operating conditions to prevent damage and thereby avoid the costly interruption of test schedules.

Posted in: Briefs, Physical Sciences, Acoustics, Turbojet engines, Performance tests, Aerodynamics
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Imaging and Spectral Measurements of Explosions

A document describes experiments performed to investigate rates of delivery of energy onto targets from different explosive formulations. The experiments were designed to measure relative positions of blast fireballs and leading shock fronts; determine whether different explosive formulations exhibit unique spectral signatures; determine temperatures of gases and solids near fireball surfaces; and measure rates of heating as functions of time. In the experiments, unconfined explosions were observed using time-resolved laser shadowgraphy, spectrometry integrated over the first 50 ms following initiation, time-resolved three-wavelength pyrometry, and time-resolved heat-flux measurements.

Posted in: Briefs, Physical Sciences, Measurements, Imaging, Fire, Impact tests, Thermal testing
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Audio Enrichment Technology

ARC International (San Jose, CA), has introduced the Virtual Bass™ audio enrichment technology that delivers a deep rich bass response on existing speakers or headphones, eliminating the need to add subwoofers or other audio components. Virtual Bass optimizes a product's bass rendering capabilities, taking into account the analog to digital converter, amplifier, speaker cavity, and speaker driver, resulting in audio that more accurately reflects the original performance without adding artificial signals or muffling voice articulation and audio clarity.

The low-power ARC® Sound Subsystem is a 100-hour audio playback solution for portable devices. When implemented on the ARC® Sound Subsystem, Virtual Bass offers a complete solution that lowers manufacturing cost while producing an enhanced listening experience. The complete solution includes an underlying silicon solution that cuts chip size and lowers power consumption, a complete set of software to provide playback of any digital music format, all the tools needed to develop the chip solution, and the complete Sonic Focus™ audio enrichment technology suite.

For Free Info Click Here.

Posted in: Products, Products, Electronics & Computers
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DSP Library

STMicroelectronics (Geneva, Switzerland) has released a new DSP library for its ARM Cortex-M3-based STM32 microcontrollers. The STM32 DSP library is license-free, royalty-free, and provides a large number of valuable functions coded in C or assembly language. These include a PID controller, Fourier transform functions, and a selection of digital filters such as 16-bit FIR, IIR direct-form, and IIR canonical-form filters. The functions are ready to use, easy to integrate, and are comprehensively documented to promote software maintainability and accelerate endproduct development. Operations such as multiply-accumulate or hardware divide can be executed within only two cycles. Demonstrations running on the STM32F103 Performance Line MCU have performed a complex 256-point 16-bit radix-4 Fast Fourier Transform (FFT) in only 362μs. Compared to alternative hybrid architectures such as digital signal controllers (DSC) with separate control- and signal-processing cores, the STM32 streamlines software development, enhances performance, and allows developers to use standard tools. The new DSP libraries can be used with the IAR, Keil, and Raisonance tool-chains for the STM32. The DSP library reduces cost and time-to-market for applications such as digital power conversion, including solar-energy projects, closed-loop control of switched-mode power supplies, audio and speech processing, and digital image processing.

For Free Info Click Here.

Posted in: Products, Products, Electronics & Computers
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Energy Harvesting Development Platform

Infinite Power Solutions (Littleton, CO) has introduced the THINERGY™Application Development Platform (ADP) that, coupled with IPS' THINERGY thin-film micro-energy cell (MEC™) products, allows users to create new microelectronic applications, such as perpetually powered and deeply embedded systems. Companies in the active RFID, powered smart card, wireless sensor, medical device, consumer electronics, automotive, and military/aerospace markets can now have access to both volume- production-ready thin-film MECs and a powerful development platform.

IPS' thin-film MECs deliver a highly efficient, safe, rechargeable and powerful energy storage solution in an extremely thin form factor. The MEC's thinness, power, and long life make it ideal for integration into embedded applications, while the ADP enables the simultaneous development of energy harvesting solutions to create a new generation of autonomously powered microelectronics systems. The THINERGY ADP simplifies the typical lab setup for micro-battery testing and is ideally suited for evaluating the IPS micro-energy cells' performance, the effectiveness of charging circuits using ambient energy harvesting, and overall system development of the user's end application.

For Free Info Click Here.

Posted in: Products, Products, Electronics & Computers
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Static-Analysis Tool

CodeSonar 3.3 Enterprise from GrammaTech, Inc. (Ithaca, NY) offers improved performance, and richer API that makes it easier for users to add a wide variety of custom checkers. It is also easier to visualize trends in software quality, and managementlevel reports and custom charting features have been refined. CodeSonar is a sophisticated staticanalysis tool that performs a whole-program, interprocedural analysis on code and identifies complex programming bugs that can result in system crashes, memory corruption and other serious problems.

CodeSonar is a useful softwareanalysis tool for companies working on mission-critical applications such as satellites, avionics, industrial controls and medical devices. CodeSonar is also suitable for companies outside the safety-critical space that are looking to significantly improve software reliability and security, which includes organizations developing software for wireless devices, networking equipment, and consumer electronics.

For Free Info Click Here.

Posted in: Products, Products, Electronics & Computers
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Safety-Certifiable Messaging Middleware

Real-Time Innovations (Sunnyvale, CA) releases the Safety- Critical Edition of RTI Data Distribution Service. The small-footprint version of RTI's real-time messaging middleware is designed to meet safety certification standards such as DO-178B. Safety- Critical Edition was initially developed for use in satellite applications by the U.S. Air Force Research Laboratory (AFRL). However, Safety- Critical Edition is also ideal for communication within and between avionics systems and Unmanned Aircraft System (UAS) ground-control stations.

Based on the Object Management Group (OMG) Data Distribution Service for Real- Time Systems (DDS) standard, Safety-Critical Edition provides a high-performance message bus for integrating distributed components of avionics systems, such as control systems, sensors, actuators and displays. Its loosely coupled integration approach significantly reduces long-term software maintenance costs by allowing individual subsystems to be added or upgraded without impacting existing software.

Safety-Critical Edition supports the standard DDS interoperability protocol and the Real-Time Publish-Subscribe Protocol (RTPS). Applications developed using Safety-Critical Edition can communicate with other systems developed using RTPS-compliant DDS middleware. This allows military UASs to be easily integrated with net-centric combat systems, where DDS is widely used.

For Free Info Click Here.

Posted in: Products, Products, Electronics & Computers
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