Fiber Optic Multi-Sensing Platforms

Eventually, technology advances to the point where solutions that have been “good enough” for decades are no longer “good enough” for the innovations of today. The philosophy of “good enough” is widely applied when developing a new product or solution. Businesses have to make decisions about what new technology features will receive the most attention to keep projects within scope and completed on time.

Posted in: Articles, Aerospace, Defense, Fiber optics, Sensors and actuators, Performance upgrades, Cost analysis

RECAT Wake Turbulence Recategorization

Aviation safety is a fundamental concern for all stakeholders. The traveling public demands the highest safety standards, but also wants convenience and reliability at a low price with minimal environmental impacts. Taking account of these sometimes competing demands can be challenging.

Posted in: Articles, Aerospace, Aviation, Defense, Safety critical systems, Education, Air traffic control, Turbulence

A New Concept for Improving the Performance of Electrically Small Antennas

Using advances in the areas of multi-mode, closely coupled miniaturized radiators and artificially engineered materials, ultra-broadband, highly efficient, electrically small antennas were developed for operation in military communications systems. A low-profile UWB antenna was developed that is composed of two electrically small loops coupled together in their near fields. Each loop has a three-dimensional surface with a bent diamond-arm shape. Half of each loop placed on top of an infinite conducting ground plane is used in the design. Each loop is loaded with a top hat to reduce the lowest frequency of operation of the antenna.

Posted in: Articles, Aerospace, Defense, Downsizing, Antennas, Performance upgrades, Military vehicles and equipment

Microwave Radiometer for Advanced Nanosatellite Control Systems

Microwave radiometers measure temperature, water vapor, and cloud ice in the atmosphere, since oxygen and water vapor naturally emit signals in the microwave portion of the electromagnetic spectrum. These signals are measured at different heights and are used to make 3D images of hurricanes, tropical storms, and thunderstorms. The NanoRacks-Microsized Microwave Atmospheric Satellite (NanoRacks-MicroMAS) measures temperature from molecular oxygen. NanoRacks-MicroMAS is a small, low-cost CubeSat containing a miniaturized microwave scanner that paves the way for future constellations of similar satellites, gathering more detailed, more frequent images of severe weather that impacts people on Earth. NanoRacks CubeSats are delivered to the International Space Station (ISS) already integrated within a NanoRacks CubeSat Deployer (NRCSD).

Posted in: Articles, Aerospace, Defense, Radar, Weather and climate, Nanotechnology, Satellites

Secret Sharing Schemes and Advanced Encryption Standard

There are many secret sharing schemes and variations available to hide and reconstruct the given secret. Shamir’s Secret Sharing Scheme, making use of linear Lagrange interpolation on the dealer-generated polynomial, was used to reconstruct the secret from the stipulated threshold number of participants’ shares. Such a scheme had been widely analyzed by mathematicians and computer scientists for potential weaknesses in the reconstruction of the secret by an external eavesdropper.

Posted in: Briefs, Defense, Software, Architecture, Computer privacy, Cryptography, Cyber security

SIPHER: Scalable Implementation of Primitives for Homomorphic Encryption

Prior to the Proceed program, the main challenges preventing practical demonstrations and use of Fully Homomorphic Encryption (FHE) were efficiency and scalability. At the start of the Program, the state-of-the-art FHE implementations were both inefficient and not scalable. Work in Scalable Implementation of Primitives for Homomorphic EncRyption (SIPHER) has brought FHE into the realm of practice, bringing several orders of magnitude runtime improvement, and resulting in FHE implementations that can be executed on single and multicore computers (including iPhones). Furthermore, implementation of an FHE hardware accelerator on a Virtex 7 Field Programmable Gate Array (FPGA) can speed up core FHE functions by over three orders of magnitude.

Posted in: Briefs, Defense, Software, Architecture, Cryptography, Integrated circuits

Using Mathematics to Make Computing on Encrypted Data Secure and Practical

In order to make computing on encrypted data more practical to use and more secure from attack, it is necessary to discover, develop, and understand the mathematics on which it is based and the mathematics that can be used to attack it.

Posted in: Briefs, Defense, Software, Mathematical models, Cryptography, Cyber security

Zero-Emissions Electric Aircraft: Theory vs Reality

Many different electrically propelled aircraft have been or are soon to be flying. Recently a zero-emissions electric aircraft, Solar Impulse, flew around the world with zero fuel. However, an electric aircraft with the payload and range of a B-777 and having zero-emissions is a few more decades in the future.

Posted in: Articles, Aerospace, Aviation, Alternative Fuels, Energy, Low emission vehicles (LEV) and Zero emission vehicles (ZEV), Electric power, Aircraft

Analog-to-Digital Converter

The new EV12AD550 1.5GSps ADC from e2v (Chelmsford, UK) supports high dynamic range at 4.5GHz and S-band direct digitization, which enables space systems to avoid costly down conversion requirements. Future Synthetic Aperture Radar (SAR) Earth observation systems, for example, will be able to operate this ADC at up to 5.5GHz without the need for down conversion. The removal of down conversion stages reduces the weight, size and power consumption of the overall space system, helping to reduce expensive orbit costs.

Posted in: Products, Manufacturing & Prototyping

Aerospace Composites

Victrex (West Conshohocken, PA) launched a new line of PAEK-based composites for the aerospace industry in the form of unidirectional (UD) tape and laminate panels. Introduced under the brand VICTREX® AE250 composites, the new product group enables the production of continuously- reinforced components that can perform under load. Such components include brackets, clips, clamps, and housings used throughout the aircraft in primary and secondary structures.

Posted in: Products, Aerospace, Manufacturing & Prototyping