Tech Exchange

Diagnostic Pattern Recognition Using Mid-IR Spectroscopy

By applying mid-infrared spectroscopy to bodily fluids, this suite of technologies offers the potential for quick, accurate, and inexpensive diagnostic support for a variety of diseases in humans or animals. Every disease or condition results in quantitative imbalances in the “normally occurring” molecules of the body — raised glucose or cholesterol, for example. Pathogens like bacteria and viruses contribute their own molecular loads as well as destabilizing the body’s “homeostasis;” its usual stable and healthy condition. A spectrographic “snapshot” of sample fluids from blood serum, lymph, and saliva can be matched to the unique spectroscopic pattern of known conditions and diseases. Pattern recognition can then result in a quick diagnosis.

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Precision Feedback-Controlled Laser Drilling for Fluid Flow Apertures

This technology provides a method of laserdrilling any component under the control of real-time feedback to provide for predictable, calibrated fluid flow through one or an array of holes formed in the component. The technique can improve flow control through a machined part by an order of magnitude or more over conventional open-loop laser drilling technologies, increasing the predicted lifetime of component parts. The method can be applied to any component or device that requires controlled flow of any fluid.

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High-Birefringence Optical Material

A high-birefringence optical material suitable for implementation in optical systems is sought. This material has several qualities of interest beyond high birefringence: high hardness, making it amenable to standard polishing and manufacturing processes; low CTE (coefficient of thermal expansion); low CTRI (coefficient of thermal refractive index); low absorption at 1.55 micrometers; and reasonable bulk density. A material is sought that can be processed and handled using standard techniques.

Posted in: NASA Tech Needs

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Freshness Indicator for Consumer Packaging

A technology is sought that indicates that a product packed into a rigid metal container has not been tampered with and/or degraded over time. The solution must incorporate a method of communicating this information to the packager, retailer, or consumer. After packaging, and depending on the product, the container may be subjected to a thermal treatment, to a maximum of 130°C for an hour for some canned foods, or a 90°C pasteurization treatment for some beverages.

Posted in: NASA Tech Needs

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Printable Biosensor for On-Site, Online Measurements

Bioactive Hybrid Materials for Photonic Microsystems It allows samples to be analyzed on site within a few minutes by integrating biotechnology, information technology, electronics, physics, and chemistry to realize small and cost-effective bio-photonic microsystems.

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High Performance Single Crystal Piezoelectrics

The new single crystals offered here possess exceptional properties and are poised to revolutionize piezoelectric materials applications. In addition to strain levels exceeding 1% (usable strain: 0.5% at 35 kV/cm), these crystals exhibit five times the strain energy density of conventional piezoceramics. Thus, unlike piezoceramic actuators that employ strain magnification schemes, single crystal actuators can deliver higher strain levels without sacrificing generative force. The high electromechanical coupling of the proposed crystals (>90%) increases transducer bandwidth, resulting in greater sensitivity and acoustic power. In addition, low strain hysteresis results in improved high power efficiency, and lower acoustic impedance than piezoceramics allowing for easier matching to air or water. High coupling also leads to dramatic improvement in passive vibration damping.

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Novel Nano-Structured Concept for Thermal Protection System

Lightweight carbon-carbon (C/C) composites produced by pressure-assisted co- polymerization of carbon fibers, hydrocarbons and fullerenes have excellent mechanical properties and high thermal stability that make them ideal for thermal protection applications.

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