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Fundamental Interaction Between Gold Nanoparticles and DNA

Quantum dots (QDs) and nanoparticles (NPs) are made of metal and/or semiconductor materials with diameters ranging from 5 to 100 nm. The properties of these nanomaterials, which depend on their size and the material they are made from, are usually completely different than the properties of their corresponding bulk materials. There may be anywhere from 1 to 1,000 electrons in a single QD, providing numerous possibilities for their opti-

cal and electrical properties.

Posted in: Briefs, Materials, Composite materials, Materials properties, Metals, Nanomaterials, Semiconductors
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High Critical Current in Metal Organic Derived YBCO Films

High-temperature superconducting (HTS) YBCO wire is a versatile technology for a number of military and commercial applications. However, anticipated military applications such as energy-dense electric propulsion systems (including motor and adjustable speed motor drives), directed-energy weapons (including the gyrotron magnet and power supply), and commercial applications such as motors, generators, transformers, and power transmission lines require improvement in the performance of such wires before these applications are broadly realized.

Posted in: Briefs, Materials, Electric cables, Materials properties, Industrial vehicles and equipment, Military vehicles and equipment
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Dense Transducer Array

A dense transducer array is an acoustic transducer with relatively high operational bandwidth. It includes a cable harness component that provides and organizes various conductors within piezocomposite substrates to form transducer arrays with minimum impact on electroacoustic performance. Several underwater sonar applications exist for high-frequency wideband transducer arrays having individual elements. In order to form and steer acoustic beams with an array of individual elements, the array elements must be spaced not more than one-half the acoustic wavelength at the highest frequency of interest. This implies, for square-shaped elements at least, that the elements' lateral dimensions are inversely proportional to frequency. Therefore, for fully populated radiating apertures, the number of elements increases exponentially as the spacing decreases.

Posted in: Briefs, Electronics & Computers, Electronic equipment, Acoustics, Marine vehicles and equipment
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ARM-Based 32-Bit MCUs

STMicroelectronics (Geneva, Switzerland) has announced that the roadmap for its breakthrough STM32 family of 32-bit MCUs based on ARM® Cortex-MT processor cores will include new devices centered on the Cortex-M4 and the Cortex-M0 cores from ARM. In addition, ST also announced the availability of its new STM32 F-2 series MCUs that unleash the performance of the Cortex-M3 core. The Cortex-M4 from ARM is an upwardly compatible version of the Cortex-M3, offering DSP instructions and a Floating Point Unit (FPU). The core will be used in new high-performance variants of STM32 products to be sampled in 2011. ST's new STM32 F-2 microcontroller series combines ST's advanced 90nm process technology with the company's innovative Adaptive Real-Time memory accelerator (ART AcceleratorT) to unleash the Cortex-M3 core's maximum processing performance.

Posted in: Products, Products, Electronics & Computers
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3-Axis Acceleration Sensor

Saelig Company, Inc. (Pittsford, NY) has introduced JoyWarrior24F14, a high-resolution USB-connected 3-axis acceleration sensor with 125μg sensitivity. The new USB-powered JoyWarrior24F14 offers acceleration resolution down to 125μg. JoyWarrior24F14 modules are based on a MEMS sensor and measure with 14-bit resolution in the ranges ±1g, ±1.5g, ±2g, ±3g, ±4g, ±8g, or ±16g, delivering 125 results per second. Because JoyWarrior24F14 enumerates and works as a joystick, accessing the data can be easily done via the operating system's joystick API without installing any specific drivers. The included software operates on Windows and MacOS X platforms and contains a configuration tool to set the sensor parameters, with tilt angle measuring, a calibration tool, and a simple data recorder. Small size (30 x 33 x 5mm) and a low mass (

Posted in: Products, Products, Electronics & Computers
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PCIe/104 Single Board Computer

Kontron (Poway, CA) has introduced the world’s first PCIe/104™ embedded single board computer (SBC) based on the Intel® Atom™ E600C processor series, pairing an Intel Atom E600 series processor with an Altera Field Programmable Gate Array (FPGA) in a single package. The Kontron PCIe/104 MICROSPACE(R) MSMST is equipped with the Intel Atom E600C processor series ranging up to 1.3 GHz with up to 2 GB onboard DRAM system memory. All components are validated for the extended temperature range from -40 °C to +85 °C. The power optimized Intel Graphics Media Accelerator (Intel GMA 600) with up to 128 MByte, 18/24 Bit LVDS and SDVO interface is integrated in the processor. Video signals are carried out by optional media boards for VGA or DVI. Optional SPDIF (out) and two analog stereo connections for line-out and mic-in take care of the high-definition audio signals.

Posted in: Products, Products, Electronics & Computers
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Programmable Logic Controller

The new Vision1040™ PLC and integrated HMI from Unitronics (Quincy, MA) allows machine manufacturers and system integrators to add both a brilliant 10.4” color touch-screen equipped with 9 programmable function key display, and full PLC functionality to their systems. The memory holds 2MB of application logic, plus 1MB for fonts and 80MB for images. Features include Micro SD card memory storage for data logging and backup, complete PLC cloning and more. The controller can scan 1K of a typical application in 9μsec. Communication options include TCP/IP Ethernet, cellular, and industrial protocols such as MODBUS, DF1 slave, J1939, and CANopen.

Posted in: Products, Products, Electronics & Computers
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Video Camera

Goodrich Corp.’s ISR Systems Princeton (Princeton, NJ) has introduced the SU640HSX mil-hardened, indium gallium arsenide (InGaAs) shortwave infrared (SWIR) uncooled video camera for military imaging systems and covert surveillance. The camera features a 640 × 512 pixel format with a 25-micron pitch, dynamic range enhancements, expanded configuration memory, and an operating temperature range from -40 to 70 °C. The camera can image through atmospheric obscurants such as fog, haze, and smoke.

Posted in: Products
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Temperature Effect on Drop-Weight Impact of Hybrid Woven Composites

The main idea of composite material is to combine different materials to produce a new material with performance unattainable by the individual constituents. It gives flexibility to the designer to tailor the new material with properties to obtain peak performance for a particular application.

Posted in: Briefs, Materials, Design processes, Composite materials, Materials properties
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Synthesis of Long-Chain-Branched (LCB) Polysulfones for Multifunctional Transport Membranes

Increasing numbers of technologies are based on the idea of harnessing charge transport for useful processes such as energy harvesting, actuation, and sensing. Although much progress exists based on perfluorosulfonated platforms, new and more complicated parameters arise as applications require multifunctionality in engineering materials. For instance, in addition to using lightweight, durable, stable, high-conductivity proton-exchange membranes in a fuel cell, it may be desirable to have the energy source bear load and operate as a structural installment. The most prevalent class of materials potentially capable of such a tradeoff is rubbery “salt-in-polymer” electrolytes that employ polymer segmental motion for transport of free ions from co-dissolved salts.

Posted in: Briefs, Materials, Fabrication, Conductivity, Elastomers, Electrolytes
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