Briefs: Physical Sciences

Recently, there has been a considerable effort to study the Casimir and van der Waals forces, enabled by the improved ability to measure small...

Briefs: Physical Sciences
Aligning Astronomical Telescopes via Identification of Stars

A proposed method of automated, precise alignment of a ground-based astronomical telescope would eliminate the need for initial manual alignment. The method, based on automated identification of known stars and other celestial objects in the telescope field of view, would also...

Briefs: Physical Sciences
Generation of Optical Combs in a WGM Resonator From a Bichromatic Pump

Optical combs generated by a monolithic resonator with Kerr-medium can be used in a number of applications, including orbital clocks and frequency standards of extremely high accuracy, such as astronomy, molecular spectroscopy, and the like. The main difficulty of this...

Briefs: Physical Sciences
Large-Format AlGaN PIN Photodiode Arrays for UV Images

A large-format hybridized AlGaN photodiode array with an adjustable bandwidth features stray-light control, ultra-low dark-current noise to reduce cooling requirements, and much higher radiation tolerance than previous technologies. This technology reduces the size, mass, power, and cost of...

Briefs: Information Technology
Analysis, Simulation, and Verification of Knowledge-Based, Rule-Based, and Expert Systems

Mathematically sound techniques are used to view a knowledge-based system (KBS) as a set of processes executing in parallel and being enabled in response to specific rules being fired. The set of processes can be manipulated, examined, analyzed, and used in...

Briefs: Information Technology
Core and Off-Core Processes in Systems Engineering

An emerging methodology of organizing systems-engineering plans is based on a concept of core and off-core processes or activities. This concept has emerged as a result of recognition of a risk in the traditional representation of systems-engineering plans by a Vee model alone, according to...

Briefs: Information Technology
Digital Reconstruction Supporting Investigation of Mishaps

In support of investigations of mishaps like the crash of the space shuttle Columbia, a process based on digital reconstruction from recovered components has been developed. The process is expected to reduce the need for physical reconstruction from recovered parts, reduce the time and...

Briefs: Information Technology
Template Matching Approach to Signal Prediction

A new approach to signal prediction and prognostic assessment of spacecraft health resolves an inherent difficulty in fusing sensor data with simulated data. This technique builds upon previous work that demonstrated the importance of physics-based transient models to accurate prediction of signal...

Who's Who: Aerospace

In 2001, NASA engineer Michael Ewert developed and patented a unique solar-powered vapor-compression refrigeration system that...

Podcasts
Michael Ewert, Deputy Project Manager, Exploration Life Support (ELS) Project, Johnson Space Center, Houston, TX

In 2001, NASA engineer Michael Ewert developed and patented a unique solar-powered vapor-compression refrigeration system that operates without batteries or external power of any kind. The system, which is powered by a...

Articles: Motion Control

In dozens of industries and in millions of applications around the world, dangerous chemicals are transferred from their original shipping containers...

Application Briefs: Test & Measurement

A unique cavitating pump dynamics test facility has been developed at Concepts NREC (CN, White River Junction, VT) in cooperation with engineers at NASA Marshall...

Products: Robotics, Automation & Control

National Instruments (Austin, TX) has announced the AKD servo drives and AKM servo motors for deploying custom motion applications to any NI real-time controller supporting NI EtherCAT technology. The motors are...

Products: Robotics, Automation & Control

MICOS USA (Irvine, CA) offers a multiphase piezo nanopositioner that reduces stick-slip signature for nanopositioning applications. The motor uses at least two piezos and friction elements that move in unison, but slip...

Products: Robotics, Automation & Control

The Model 475 series diaphragm valves from Tridak, a Dymax Co. (Torrington, CT), are used with low- to medium-viscosity fluids. The internal design prevents fluid contact with the actuating components, making them suitable...

Products: Robotics, Automation & Control

US Digital (Vancouver, WA) offers the QSB (Quadrature to USB) encoder interface adapter that interfaces standard quadrature encoder signals into a PC USB port for encoder verification. Single-ended or differential...

Products: Robotics, Automation & Control

Novotechnik (Southborough, MA) has introduced the TX2 series of position sensors with stroke lengths up to 300 mm. The sensors are sealed to IP67 specifications, and feature an 18-mm-diameter housing size. The sensors...

Products: Sensors/Data Acquisition

PIHER North America (Libertyville, IL) offers the PS15 rotary position sensor in a 15-mm package. It is surface-mountable for detecting changes in angle and position, and converting them to a voltage output. It can be...

Products: Robotics, Automation & Control

The HR 1120 electronic handwheel from Heidenhain Corp. (Schaumburg, IL) is used in machine automation systems where changing formats or positioning objects with numerous axes is necessary. It is suitable for both...

Products: Robotics, Automation & Control

Haydon Kerk Motion Solutions (Hollis, NH) offers the Kerk® Micro Series lead screw assemblies. Standard configurations include 2-mm-diameter screws with leads ranging from 0.3 mm to 2 mm revolution, and a variety of nut...

Products: Robotics, Automation & Control

The Thomas 1210 Series diaphragm liquid DC pump from Thomas Division (Sheboygan, WI) features the REFLEX valve design that provides a bubble-free liquid flow for fuel cell and diagnostic applications. Available in 12V and 24V...

Products: Robotics, Automation & Control

International Rectifier (El Segundo, CA) offers the AUIRS4426S dual-channel, low-side driver IC for hybrid power train drives, direct fuel injection, and DC-DC converter applications. Available in an 8-lead package, the IC is a...

Products: Robotics, Automation & Control

Lee Linear (Piscataway, NJ) has introduced end-machined precision rolled ball screws available in a range of sizes and leads. Made from induction case-hardened alloy sheet, the screws are integrally sealed and are...

Products: Robotics, Automation & Control

The PTAM27L series MEMS-based inclinometer from ASM Sensors (Elmhurst, NY) is designed for single- and dual-axis tilt angle measurements. For single-axis versions, measurement ranges span from ±15° to ±180°, in...

Products: Robotics, Automation & Control

Aerotech (Pittsburgh, PA) offers the ANT 130-5-V linear motor-driven wedge-style vertical lift stage that provides in-position stability for nanopositioning applications. It offers travel up to 5 mm and is a precision...

Products: Robotics, Automation & Control

The Super Torque 5818 series stepper motors from Lin Engineering (Morgan Hill, CA) measure 2.4" and feature up to 305 oz-in of holding torque. Bipolar and unipolar windings are available with the option of a custom winding for...

Products: Photonics/Optics

SCHOTT (Mainz, Germany) has developed a version of its N-BK7 glass that offers extremely high transmission (HT) for the types of prisms used in digital theater projectors. The new N-BK7HT guarantees a minimum...

Products: Photonics/Optics

The ProScan™ III Microscope Automation System from Prior Scientific (Rockland, MA) features a compact and modular design capable of controlling up to 16 axes including a motorized stage, focus drive, three...

Products: Photonics/Optics

CRAIC Technologies (San Dimas, CA) has released the 64-bit version of its MINERVA™ microspectroscopy software package, designed to collect, analyze and process microspectra™ from CRAIC...

Videos