Implantable Electrochemical Sensors for Metabolic Monitoring

Arrays of electrochemical sensors that include specially coated (as described below) gold electrodes on flexible polyimide sheets have been fabricated and tested in a continuing effort to develop biocompatible, surgically implantable electrochemical-sensor arrays for continuous measurement of concentrations of analytes that play major roles in human and animal metabolism. The effort thus far has been oriented particularly toward developing sensors for monitoring one analyte — glucose — to enable improved treatment of diabetic patients. It is planned to extend this effort to the fabrication and testing of sensors for monitoring lactate and pyruvate and, eventually, to implement the concept of a single array that contains sensors for monitoring glucose, lactate, and pyruvate.

Posted in: Briefs, Medical, Sensors and actuators, Medical, health, and wellness

Portable Simulator for Training in Robot-Assisted Surgery

Aportable apparatus is being developed as a means of training surgeons in robot-assisted surgery, including laparoscopic and other forms of minimally invasive surgery. The apparatus can be characterized as a virtual reality system that includes not only a computer and a visual display subsystem, but also an electromechanical subsystem with which a surgeon in training can interact as though interacting with a console of the type used to control a laparoscopic, endoscopic, or other surgical robot.

Posted in: Briefs, Medical, Simulation and modeling, Surgical procedures, Robotics

Imaging System for Characterizing Materials and Processes

Ahigh-performance digital imaging system has been assembled to provide enhanced capabilities for characterizing materials and processes. Highspeed imaging is needed for observation and analysis of such fast dynamic processes as impact fracture (including ballistically induced fracture) in advanced composite materials, dynamic deformation of materials, and hydrodynamic instabilities in jets. Because these dynamic processes occur at diverse temporal and spatial scales, there is a need for an imaging system that can operate at correspondingly diverse frame rates, spatial resolutions, and magnifications, and that is capable of recording various numbers of image frames.

Posted in: Briefs, Physical Sciences, Imaging

Progress in Research on Bacteria-Powered Motors

Progress has been made on several fronts in research on biomotors and especially on microscopic motors powered by bacteria. The progress consists mostly of advances in the art of attaching motile bacterial cells to surfaces in specific, pre-designed microarrays.

Posted in: Briefs, Physical Sciences, Bacteria

Fabrication of Lightweight Armored Doors for HMMWVs

A document describes a concept for fabricating lightweight armored doors for the Army’s high-mobility multipurpose wheeled vehicles (HMMWVs). Essentially, the concept is to reinforce high-hard (HH) steel armored doors used on some HMMWVs with a laminated, woven, high-tensile-strength glassfiber/ polyester-matrix composite that has performed well as armor material in previous military applications. A fabrication procedure for implementing the concept, described in the document, can be summarized as follows:

Posted in: Briefs, Manufacturing & Prototyping, Doors, Fabrication, Composite materials, Glass fibers, Steel, Military vehicles and equipment

AFRL’s Demonstration and Science Experiments Mission

A document describes the Air Force Research Laboratory's Demonstration and Science Experiments (DSX) mission, dedicated to research needed to advance the ability to operate spacecraft in the harsh radiation environment of medium earth orbit (MEO). The DSX spacecraft, to be launched in late 2009 into an orbit ranging in altitude from 6,000 to 12,000 km, is designed to carry instruments pertinent to studies in three categories:

Posted in: Briefs, Physical Sciences, Research and development, Spacecraft

Embedded Security: Down to the Silicon

Embedded applications are increasingly going online. With the introduction of new embedded technologies that utilize a wide variety of communications options from Ethernet to Wi-Fi and ZigBee, there is a pressing need to secure these applications against the same problems that are inherent in any networked application.

Posted in: Articles, Articles, Electronics & Computers, Cyber security, Embedded software, Telecommunications systems, Wireless communication systems

Next-Gen Networks Drive AdvancedTCA Deployments

The evolution of technology and the never-ending thirst for higher bandwidth from industries and applications are pushing the limits of existing standards. The latest processors run faster and integrate more features, thus requiring greater power, more efficient cooling design, and a larger board size. The explosion of bandwidth in enterprise local-area networks (LANs) brought on by the deployment of gigabit Ethernet, 3G/WiMAX mobile communication, and wireless network systems and the growth of triple-play or multi-play network services, have all fueled the demand for servicing greater amounts of data traffic.

Posted in: Articles, Articles, Electronics & Computers, Computer software / hardware, Data exchange, Performance upgrades

Secure Your Embedded Wireless Network

Connecting devices like medical instruments, weigh scales, printers, sensors, and other embedded devices to wireless networks allows the user to gain unprecedented freedom and mobility without the need for cumbersome cabling. Traditionally, many of these devices have been confined to a certain area, and the applications have been prone to human error when used by someone to manually collect information and then transfer it to a computer.

Posted in: Articles, Articles, Electronics & Computers, Cyber security, Wireless communication systems

Encapsulated Video “Brick” Bolsters Video Surveillance Along Boarder

Increasingly dependent on continuous video monitoring and recording, even today's more sophisticated security surveillance systems are often plagued by reliability problems. In some ways, more complex video systems are susceptible to signal and other dependability problems simply because they are multifaceted. Systems integrators may know what cameras and recorders to use in a given situation, but they also need to consider how subcomponents could play a critical role under certain conditions. A noisy switch or incompatible distribution amplifier (DA) can compromise the integrity of a video security system yet go undiagnosed or even undetected until the horse is already out of the barn.

Posted in: Application Briefs, Application Briefs, Electronics & Computers, Imaging, Security systems, Surveillance