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Submersion and Directed Flow Cooling Technology for Military Applications

As the US military shifts from boots on the ground to drones in the sky, there will be an increasing need for computing power on foreign soil, under the sea and in the air. Design objectives will be difficult to achieve with legacy technology. Electronic gear must be deployed by transport plane and require rapid setup once the destination is reached. Systems will need to be hardened to survive extreme temperatures, desert sand, salt air and pollution. Fuel logistics to serve remote locations can be difficult and expensive. Every kilowatt-hour of electricity converted to heat must be dissipated and, ideally, the waste energy should be recycled. For ground installations, it will be useful to consider distributing computing resources around rather than concentrating them at a single location that may be vulnerable to attack. Silent operation also is desirable.

Posted in: Aerospace, Defense, Articles, DTB

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Flying on Vegetation

Airlines, aircraft companies, and other stakeholders are taking the long view in developing sustainable alternatives to petroleum-based jet fuels. by Bruce Morey Fuel is expensive for airlines. According to sources interviewed for this article, fuel accounts for 30 to 50% of operating costs, depending on the size of the aircraft. And fuel prices remain volatile.

Posted in: Aerospace, Defense, Articles, DTB

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Avionics Heat Up, in a Good Way

As was apparent at Farnborough, if there is a single technology theme that today dominates how aircraft are designed, built, and operated, it is the transformational progress being made in aerospace avionics, and the human-machine interface. by Richard Gardner The common feature shared by recent aviation platforms is the high level of systems integration, and the way in which information is displayed or made accessible, allowing previously unimaginable levels of situational awareness to be available to pilots and ground controllers. This has greatly eased the pilot workload and enhanced flight safety, especially when flying in poor weather or operating in unfamiliar or hazardous terrain.

Posted in: Aerospace, Defense, Articles, DTB

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Airborne Antenna Considerations for C-Band Telemetry Systems

It is fairly well known within the aerospace community that telemetry is moving from the traditional L-band and S-band frequency ranges up to C-band. It is widely understood that the reason for this push to C-band is two-fold. First, traditional L and S frequency bands have been greatly reduced through reallocation for a variety of reasons by different markets, and second, the bandwidth required for most applications has seen exponential growth. This has not only been seen in military applications, but in civilian aerospace platforms as well.

Posted in: Aerospace, Defense, Articles, DTB

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Software-Designed System Improves Wireless Test Speed and Coverage

As wireless standards become more complex, the number of operational modes for these devices increases exponentially. As progression continues to the latest WiFi standard, new modulation schemes, more channels, more bandwidth settings, and additional spatial streams are added. Additionally, characterizing WLAN transceivers is especially challenging when faced with thousands of independent operational gain settings.

Posted in: Aerospace, Defense, Application Briefs, DTB

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Developing and Validating Statistical Cyber Defenses

The development and validation of advanced cyber security technology frequently relies on data that captures normal and suspicious activities at various system layers. Air Force Research Laboratory, Rome, New York Enterprise business processes are more connected than ever before, driven by the ability to share the right information with the right partners at the right time. While this interconnectedness and situational awareness is crucial to success, it also opens the possibility for misuse of the same capabilities by sophisticated adversaries to spread attacks and corrupt critical, sensitive information. This is particularly true for an insider threat scenario in which adversaries have legitimate access to some resources and unauthorized access to other resources that is not directly controlled by a fine-grained policy.

Posted in: Information Sciences, Electronics & Computers, Aerospace, Defense, Briefs

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Next-Generation Spectrometers for Rapid Analysis of Complex Mixtures

Spectrometers in chemical sensors are used in environmental and air quality monitoring, detection of hazardous gases and chemical warfare agents, and breath analysis in medical applications. Office of Naval Research, Arlington, Virginia Molecules have internal motions that are characteristic of their structure and identity. These motions can be studied by spectroscopy in different regions of the electromagnetic spectrum. Molecular spectra can be used as a “fingerprint” to unambiguously state whether or not a particular chemical is present and in what amount. As such, small portable spectrometers are frequently used as components of chemical sensors.

Posted in: Physical Sciences, Aerospace, Defense, Briefs

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