Keyword: Parts

Briefs: Manufacturing & Prototyping

The pulse-flow microencapsulation system (PFMS) is an automated system that continuously produces a stream of liquid-filled microcapsules for delivery of therapeutic agents to target tissues. Prior...

Application Briefs: Electronics & Computers

Design engineers soon will need to bridge the growing gap between hardware reality and software capabilities in the high-performance computing (HPC) realm as the use of multicore microprocessors grows. If...

Articles: Robotics, Automation & Control

The task of choosing the correct mix of motion control components for a successful servo positioning system involves a combination of art, science, and experience. It also includes a little luck, but luck...

Application Briefs: Motion Control

Optical fiber, now the mainstay of telecommunications as well as sensor, illumination, and imaging systems, is made by first pulling a large-diameter preform into a long, filimentous fiber. Then divided...

Application Briefs: Test & Measurement

Container leaks can range from mildly annoying to potentially dangerous. To avoid faulty containers from ever leaving the production line, producers have installed testing devices as part...

Application Briefs: Electronics & Computers

SpeckleCam Electronic Speckle Pattern
Interferometer (ESPI)
4D Technology
Tucson, AZ
520-294-5600
www.4dtechnology.com
Briefs: Test & Measurement
Simulator for Testing Spacecraft Separation Devices

A report describes the main features of a system for testing pyrotechnic and mechanical devices used to separate spacecraft and modules of spacecraft during flight. The system includes a spacecraft simulator [also denoted a large mobility base (LMB)] equipped with air thrusters, sensors, and...

Briefs: Test & Measurement

A desk-sized apparatus for testing monoball bearings and their lubricants offers advantages, relative to prior such apparatuses, of (1) a greater degree of automation and (2) capability of...

Briefs: Electronics & Computers

The figure shows an instrument incorporating an infrared camera for detecting small hydrogen fires. The instrument has been developed as an improved replacement for prior infrared and...

Briefs: Electronics & Computers

In a modified configuration of a coaxial probe feed for a layered printed-circuit antenna (e.g., a microstrip antenna), the outer conductor of the coaxial cable extends through the thickness...

Briefs: Software
Generating a 2D Representation of a Complex Data Structure

A computer program, designed to assist in the development and debugging of other software, generates a two-dimensional (2D) representation of a possibly complex ndimensional (where n is an integer >2) data structure or abstract rank-n object in that other software. The nature of the...

Briefs: Semiconductors & ICs

Two modern cryogenic variants of the Pound circuit have been devised to increase the frequency stability of microwave oscillators that include cryogenic sapphire-filled cavity...

Briefs: Mechanical & Fluid Systems
Rapid-Chill Cryogenic Coaxial Direct- Acting Solenoid Valve

A commercially available cryogenic direct-acting solenoid valve has been modified to incorporate a rapid-chill feature. In the original application for which this feature was devised, there is a requirement to ensure that at all times, the valve outlet flow consists entirely or mostly...

Briefs: Physical Sciences
Miniature Free-Space Electrostatic Ion Thrusters

A miniature electrostatic ion thruster is proposed for maneuvering small spacecraft. In a thruster based on this concept, one or more propellant gases would be introduced into an ionizer based on the same principles as those of the device described in the earlier article, “Miniature Bipolar...

Briefs: Physical Sciences

The figure depicts a proposed miniature ion-mobility spectrometer that would share many features of design and operation of the instrument described in the immediately preceding article. The main differences...

Briefs: Physical Sciences

Developing a control system rapidly and cost effectively requires a disciplined approach that exposes design limitations early so they can be corrected before the...

Briefs: Physical Sciences
Promoted-Combustion Chamber With Induction Heating Coil

An improved promoted-combustion system has been developed for studying the effects of elevated temperatures on the flammability of metals in pure oxygen. In prior promoted-combustion chambers, initial temperatures of metal specimens in experiments have been limited to the temperatures of...

Briefs: Photonics/Optics

The Matrix Assisted Laser Desorption and Ionization (MALDI) technique in 1987 led to a renewed interest for the nitrogen laser. MALDI allows large and fragile biomolecules to be desorbed and...

Briefs: Photonics/Optics

An electro-optical (E-O) imaging Fourier-transform spectrometer (IFTS), now under development, is a prototype of improved imaging spectrometers to be used for hyperspectral imaging,...

Briefs: Medical
Instrument Would Detect and Collect Biological Aerosols

A proposed compact, portable instrument would sample micron-sized airborne particles, would discriminate between biological ones (e.g., bacteria) and nonbiological ones (e.g., dust particles), and would collect the detected biological particles for further analysis. The instrument is...

Briefs: Mechanical & Fluid Systems
A system for continuous, rapid deaeration of hydraulic oil has been built to replace a prior system that effected deaeration more slowly in a cyclic pressure/vacuum process. Such systems are...
Articles: Robotics, Automation & Control

The age-old tradition of using shaft keys in mechanical drives has served the power transmission industry well for many years. When appropriately sized, it guarantees that virtually no relative...

Application Briefs: Robotics, Automation & Control

In the 1980s and 1990s, NASA’s Jet Propulsion Laboratory (Pasadena, CA) began developing advanced microsystems and microelectronics technologies and components for future space...

Application Briefs: Robotics, Automation & Control

In situations where human travel is necessary but where the geography is too steep or treacherous, aerial tramways often are used as a convenient alternative. Ski resorts, mountaineering...

Briefs: Photonics/Optics

RedShift Systems, Waltham, Massachusetts

The desire to “see” in complete darkness or through obscurants such as smoke or fog has driven the development and adoption of thermal...

Briefs: Medical

A proposed method of surgical repair of fractured bones would incorporate recent and future advances in the art of composite materials. The composite materials used in this method...

Briefs: Materials
Patches for Repairing Ceramics and Ceramic Matrix Composites

Patches consisting mostly of ceramic fabrics impregnated with partially cured polymers and ceramic particles are being developed as means of repairing ceramics and ceramic-matrix composites (CMCs) that must withstand temperatures above the melting points of refractory metal alloys....

Briefs: Software
General Flow-Solver Code for Turbomachinery Applications

Phantom is a computer code intended primarily for real-fluid turbomachinery problems. It is based on Corsair, an ideal-gas turbomachinery code, developed by the same authors, which evolved from the ROTOR codes from NASA Ames. Phantom is applicable to real and ideal fluids, both...

Briefs: Software
Program Predicts Performance of Optical Parametric Oscillators

A computer program predicts the performances of solid-state lasers that operate at wavelengths from ultraviolet through mid-infrared and that comprise various combinations of stable and unstable resonators, optical parametric oscillators (OPOs), and sum-frequency generators (SFGs),...