MEMs

Development of an Electrochemical Biosensor for Organophosphate Chemicals

Detection of organophosphate (OP) compounds has attracted much attention in terms of safeguarding human health, owing to their frequent use as pesticides in agriculture and their potential use as chemical warfare agents. Among a variety of biological methods based on the biocatalytic activity of organophosphorus hydrolase (OPH), amperometric, potentiometric, and optical biosensing devices have been developed for detecting OPs. Electrochemical biosensors in particular have been widely investigated to monitor various pesticides including OP compounds such as paraoxon, parathion, sarin, and soman via an enzyme-catalyzed hydrolysis reaction by OPH due to their fast speed, high efficiency, low cost, and small sample size.

Posted in: Briefs, Physical Sciences, Sensors and actuators, Volatile organic compounds, Medical, health, and wellness
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Novel Active Transient Cooling Systems

Energy-efficient cooling technology is extremely important in today’s society, considering the need for energy conservation and the urgent need to mitigate global warming. Near-room-temperature magnetic refrigeration is an emerging cooling technology that has several advantages compared to conventional gas-compression technology. It utilizes the magnetocaloric effect (MCE) in which heating and cooling of a magnetocaloric material (MCM) is induced by a varying external magnetic field. The magnetocaloric effect (the temperature change of a magnetic material due to the application of an external magnetic field) is the cornerstone of magnetic cooling.

Posted in: Briefs, Physical Sciences, Energy conservation, Cooling, Magnetic materials
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Diode Laser Sensor for Scramjet Inlets

The supersonic combustion ramjet (scramjet) engine is one of the more promising high-speed flight propulsion technologies. One of the reasons for this is the simplicity of the engine design, having no moving parts and requiring no external ignition source, and the fact that scramjets do not need to provide their own oxidizer. Despite this simplicity, several obstacles to the use of scramjet propulsion systems have become apparent, including the ability to produce sufficient fuel-air mixing at high speed, large total pressure losses, reduction in specific impulse with increasing flight Mach number, and the sensitivity of combustion to inlet temperature. This last problem can be very significant.

Posted in: Briefs, Physical Sciences, Lasers, Sensors and actuators, Combustion and combustion processes, Scramjet engines
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MALDI-MSI Imaging of Latent Fingerprints

For years, forensic scientists have been seeking new methods to improve existing techniques for the visualization of latent fingerprints. The structured combination of optical methods (diffused reflection, luminescence, UV absorption and reflection), physical methods (powdering, vacuum metal deposition, small particle reagent), physico-chemical methods (physical developer, multi-metal-deposition, iodine, cyanoacrylate), and chemical methods (ninhydrin and its analogues, DFO, etc.), permits a highly efficient processing of the secretions deposited by the fingers on a great variety of substrates. To visualize these developed fingerprints, alternative light sources or laser-based detection methods are commonly used. However, like all other existing techniques, these optical methods do not work in all possible cases, and certain types of latent fingerprints or object surfaces with unique characteristics may be problematic.

Posted in: Briefs, Physical Sciences, Imaging, Lasers, Optics, Spectroscopy, Identification
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Compressive Oversampling for Robust Data Transmission in Sensor Networks

A paper discusses recent developments in the area of Compressive Sensing (CS) for data loss in wireless sensing applications. Since many physical signals of interest are known to be sparse or compressible, employing CS not only compresses the data and reduces the effective transmission rate, but also improves the robustness of the system to channel erasures. This is possible because reconstruction algorithms for compressively sampled signals are not hampered by the stochastic nature of wireless link disturbances, which has traditionally plagued attempts at proactively handling the effects of these errors.

Posted in: Briefs, Physical Sciences, Mathematical models, Data exchange, Wireless communication systems, Reliability
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12V Front-End Distributed Power Supply

Emerson Network Power (Carlsbad, CA) has introduced the DS2900, a high-wattage 12V front-end distributed power supply. The Emerson DS2900 is rated for up to 2900W of adjustable output power at 240A. In addition to 12 VDC output, it offers 3.3 VDC auxiliary output for powering standby circuitry, and an optional alternative 5.5 VDC auxiliary output. The compact 2U × 3U form factor offers system-level power density of more than 24W per cubic inch. It offers typical operating efficiency of approximately 91 percent at 50 percent load. The power supply’s shorter form factor also allows mid-plane rack configurations, while same-side AC inputs and DC outputs allow hot-plug rack configuration.

Posted in: Products, Products, Embedded Technology, Board-Level Electronics, Electronics & Computers
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Replacement End-Of-Life Semiconductors

Rochester Electronics (Newburyport, MA) provides authorized reverse engineering services to recreate, manufacture and distribute pin-for-pin replacement parts with matched cycle for cycle timing for aftermarket semiconductor devices. Through its unique Rochester Semiconductor Replication Process™ (SRP™), customers can avoid system re-qualification steps as the Rochester-designed and manufactured parts deliver the same specifications and performance characteristics as the original products.

Posted in: Products, Products, Embedded Technology, Board-Level Electronics, Electronics & Computers
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Universal Injection Transformer

OMICRON Lab’s (Houston, TX) new universal injection transformer, B-WIT 100, was developed for the stability analysis of switched mode power supplies and control loops of any kind. Due to its special design, the B-WIT 100 combines a very wide frequency range (1Hz - 10 MHz) with a 600V CAT II compliant output.

Posted in: Products, Products, Embedded Technology, Board-Level Electronics, Electronics & Computers
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PCB Design-Tool

Sunstone Circuits (Mulino, OR), the printed circuit board (PCB) prototype solutions provider, is launching the newest version of their design software, PCB123® v4. This free-to-use, no license required design-tool has an intuitive CAD interface that lets you create new PCB designs quickly, offering freedom and flexibility in your schematic and layout editing.

Posted in: Products, Products, Embedded Technology, Board-Level Electronics, Electronics & Computers
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UPS With Long-Life Batteries

Falcon Electric, Inc. (Irwindale, CA) has introduced a long-life battery in its SSG Series™ Industrial-Grade Uninterruptible Power Systems (UPS) Plus product line. The units are available in models from 1.5 to 3kVA and in both 120 VAC and 230 VAC versions, and are capable of withstanding elevated temperatures of up to 55°C for prolonged periods of time. The long-life battery is particularly suited to environments with temperatures that exceed 40°C, such as a factory floor, a desert setting, or any computer rack. In such temperatures, the batteries are rated to last at least twice as long as a standard five-year/40°C rated battery. Specifically, the long-life battery has an expected life of seven years at 40°C and four years at 50°C, as compared to a standard battery, which is rated to last less than two years at 40°C and less than a year at 50°C.

Posted in: Products, Products, Embedded Technology, Board-Level Electronics, Electronics & Computers
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