Special Coverage

Technique Provides Security for Multi-Robot Systems
Bringing New Vision to Laser Material Processing Systems
NASA Tests Lasers’ Ability to Transmit Data from Space
Converting from Hydraulic Cylinders to Electric Actuators
Automating Optimization and Design Tasks Across Disciplines
Vibration Tables Shake Up Aerospace and Car Testing
Supercomputer Cooling System Uses Refrigerant to Replace Water
Computer Chips Calculate and Store in an Integrated Unit
Electron-to-Photon Communication for Quantum Computing

Robert W. Moorehead, Director of Space Flight Systems, John H. Glenn Research Center

Robert W. Moorehead served as NASA’s chief investigator for the Space Shuttle Challenger accident in 1986 and managed the Space Station Freedom program from 1989 to 1993. He has also held the title of NASA’s Chief Engineer, developing system architectures for the Space Shuttle’s replacement. He is currently Director of Space Flight Systems at the John H. Glenn Research Center in Cleveland, Ohio.

Posted in: Who's Who
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Four-Pass Coupler for Laser-Diode-Pumped Solid-State Laser

A smaller laser slab can be made to perform comparably to a larger one.

A four-pass optical coupler affords increased (in comparison with related prior two-pass optical couplers) utilization of light generated by a laser diode in side pumping of a solid-state laser slab. The original application for which this coupler was conceived involves a neodymium- doped yttrium aluminum garnet (Nd:YAG) crystal slab, which, when pumped by a row of laser diodes at a wavelength of 809 nm, lases at a wavelength of 1,064 nm.

Posted in: Briefs, TSP, Physical Sciences, Architecture, Lasers, Architecture, Lasers, Aluminum alloys, Refractory materials
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Varying the Divergence of Multiple Parallel Laser Beams

Lenses mode-matched to the laser beams would be moved axially within an afocal optical subassembly.

A provision for controlled variation of the divergence of a laser beam or of multiple parallel laser beams has been incorporated into the design of a conceptual free-space optical-communication station from which the transmitted laser beam(s) would be launched via a telescope. The original purpose to be served by this provision was to enable optimization, under various atmospheric optical conditions, of the divergence of a laser beam or beams transmitted from a ground station to a spacecraft. Beyond the original purpose, the underlying design concept could be beneficial for terrestrial free-space laser communication, ranging, and scientific instrumentation applications in which there are requirements to vary the divergences of laser beams.

Posted in: Briefs, Physical Sciences, Lasers, Waveguides, Wireless communication systems, Lasers, Waveguides, Wireless communication systems
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Low-Resolution Raman-Spectroscopy Combustion Thermometry

This method offers advantages over related prior Ramanspectroscopy- based methods.

A method of optical thermometry, now undergoing development, involves low-resolution measurement of the spectrum of spontaneous Raman scattering (SRS) from N2 and O2 molecules. The method is especially suitable for measuring temperatures in high-pressure combustion environments that contain N2, O2, or N2/O2 mixtures (including air).

Posted in: Briefs, Physical Sciences, Spectroscopy, Spectroscopy, Nitrogen oxides, Combustion chambers, Thermal testing
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Catalytic Filters for Outdoor Power Equipment

NoxFox™ Catalytic Filters reduce harmful emissions from engine exhaust with performance comparable to existing catalytic converters. High-surface-area ceramic nanofibers hold nanoparticles of platinum, palladium, rhodium, and other catalysts, so that NoxFox catalytic filters are comparatively lightweight and robust. Patented, catalyzed ceramic nanofibers (nCATfibers™) provide high surface area for maximal contact and minimal exhaust resistance. Engine makers can use NoxFox catalytic filters do the job not possible by engine tuning and deliver a highly “green” product. In addition, the product’s unique structure results in a 50% weight reduction over existing honeycomb catalytic converters.

Get the complete report on this technology at: Email: nasatech@yet2.com Phone: 781-972-0600

Posted in: Techs for License
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Password Protection System Requires No Special Hardware

The High-Security Password System takes the place of strong passwords on digital devices and online services, yet is easy to remember and quick to enter for most individuals. This system places images in a two- or three-dimensional matrix to generate the equivalent of a ten-digit number. The security of the system can be increased by cells in the matrix, also consisting of a number of cells.

Posted in: Techs for License
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Anti-Itch Non-Steroidal

A company is seeking technology (synthetic actives, natural actives, delivery systems) to eliminate itch for a variety of indications for over-the-counter applications; specifically, actives and/or delivery systems that will relieve itching. The technology should eliminate itching for a significant period of time (i.e. several hours, minimum). Alternatively, immediate relief (within 60 seconds) would be of interest. Any formulation is acceptable, but oral delivery or physical barrier approaches will not be considered.

Respond to this TechNeed at: Email: nasatech@yet2.com Phone: 781-972-0600

Posted in: NASA Tech Needs
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Converting High-Molecular-Weight Polymer Emulsions Into Dry Form

A company that supplies chemicals, including inverse emulsions that consist of a very high- molecular-weight, water-soluble polymer dispersed in a continuous oil phase, is seeking technologies that can convert these emulsions to powdered form without losing any of the polymer properties. Known technologies include spray-drying and precipitation. Precipitation processes are based upon the water and oil being soluble in some polar solvents, while the high-molecular- weight polymer is insoluble in these solvents.

Respond to this TechNeed at: Email: nasatech@yet2.com Phone: 781-972-0600

Posted in: NASA Tech Needs
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Using RFID to Protect System Firmware

Breeching the security of safety- or security-intensive products such as auto parts, set top boxes, military electronics, or smart batteries can be a lucrative business that is well worth the nominal investment required to create lookalike packaging and labeling, or to change the system firmware to allow unpaid access to licensed content. Because the counterfeiter does not incur any of the costs associated with product development, he quickly covers his capital investment at the expense of the authentic product manufacturer or service provider.

Posted in: Articles, Articles, Electronics & Computers
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Board Versus Box: The Age-Old DAQ Dilemma

Since the beginning of PC-based data acquisition and control in the 1980s, one question has remained a constant consideration for all who would specify a new DAQ system. Is this application better served by an external I/O “box” connected to the PC via some communications link, or an internal “board” system plugged into a slot within the computer? If anything, this question has become more complicated as technology has progressed.

Posted in: Articles, Articles, Electronics & Computers
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