Keyword: Optimization

Briefs: Medical
LightCensor Software for Optimized Viewing of Medical Images

Because of improved display quality, the smartphone has been advocated by medical imaging vendors for viewing medical images in specific conditions that require urgency of results, or when full-sized workstation displays are not readily available. As a handheld device, the viewing...

Briefs: Software
Discontinuous-Galerkin Spectral-Element Solver (Eddy)

Eddy is a fundamental research code for advancing spectral methods for complex geometry. The software is intended to enable researchers to collaborate through a common framework that supports three-dimensional simulations on practical problems. Areas of interest include advanced numerical...

Briefs: Software
Data Compression and Pattern Recognition Software for Hypersensor Data

Historically, there have been various approaches to problems relating to the detection of small, weak, or hidden objects, substances, or patterns embedded in complex backgrounds. One approach has been to use low-dimensional sensor systems that attempt to detect a clean...

Briefs: Mechanical & Fluid Systems

Friction Pull Plug Welding (FPPW) is the process necessary to plug the hole that is left behind as a friction stir weld (FSW) joint is completed and the pin tool of the welder retracts from the...

Articles: Photonics/Optics

The challenges in achieving greater accuracy in optical thin-film coatings, both historically and in today's coating processes, are many and deserve our scrutiny. The...

Briefs: Software

The Automated Impacts Routing (AIR) software is advanced route finding technology for air and ground vehicles. The software provides users the ability to find optimized paths through...

Briefs: Photonics/Optics

When women undergo lumpectomies to remove breast cancer, doctors try to remove all the cancerous tissue while conserving as much of the healthy breast tissue as possible. But currently there's no...

Briefs: Communications
A Smooth-Walled Feedhorn with Sub-30-dB Cross-Polarization Over a 30-Percent Bandwidth

The focus of this research was the design, optimization, and measurement of a monotonically profiled, smooth-walled scalar feedhorn with a diffraction-limited ~14° FWHM (full width at half maximum). It is an easier-to-manufacture, smooth-walled feed that...

Briefs: Green Design & Manufacturing

The Routing Application for Parallel computation of Discharge (RAPID, here) is a river routing model. Given surface and groundwater inflow to rivers, this model can compute the flow and volume of water everywhere in river...

Briefs: Photonics/Optics
Partially Transparent Circular Mask to Suppress Narrowband Laser Light

The evolved Laser Interferometry Space Antenna (eLISA) is the implementation of the original Laser Interferometry Space Antenna (LISA) concept that will be proposed for the European Space Agency's (ESA) L.3 Cosmic Visions opportunity. The eLISA observatory uses lasers to...

Briefs: Software

When tackling modern engineering projects, designers must consider not only engineering parameters, but also such key factors as cost, safety, and environmental impact. To exploit...

Briefs: Software
Shift: Self-Healing Independent File Transfer

In high-end computing environments, remote file transfers of very large data sets to and from computational resources are commonplace, as users typically are widely distributed across different organizations and must transfer in data to be processed, and transfer out results for further analysis....

Briefs: Photonics/Optics
CUDA Framework for Linear Time-Invariant Control of Adaptive Optics Systems

Current science objectives, such as high-contrast imaging of exoplanets, have led to the development of highorder adaptive optics (AO) systems possessing several thousand deformable mirror (DM) actuators. These systems typically rely on integrator-based control...

Briefs: Software

Insoles for diabetics have traditionally been handmade by makers of orthopedic shoes. In the future, these specialist shoemakers will be able to produce insoles more cost effectively...

Application Briefs: Motion Control

A manufacturer of low and high-rise elevators faced a challenge when customers began calling for a flexible elevator to meet the needs of the growing mid-rise, mixed-use building...

Articles: Imaging

High-power (multi-kW) fiber lasers are revolutionizing industrial materials processing markets by offering an unmatched combination of performance, reliability, and cost advantages. For example, in sheet metal cutting...

Briefs: Software
BPTables DTN Bundle Filtering Framework

The Internet Engineering Task Force (IETF) standardized Bundle Protocol (BP) enables data transfer using “bundles” over a Delay/Disruption Tolerant Network (DTN). BPTables is a bundle filtering framework that enables the establishment of barriers between more and less trusted BP network domains, and...

Briefs: Mechanical & Fluid Systems
Improving Stirling Engine Performance Through Optimized Piston and Displacer Motion

Stirling engines typically achieve high efficiency, but lack power density. Low power density prevents them from being used in many applications where internal combustion engines are viable competitors, and increases system costs in applications that require...

Briefs: Photonics/Optics
CUDA Framework for Linear Time-Invariant Control of Adaptive Optics Systems

Current science objectives, such as high-contrast imaging of exoplanets, have led to the development of high-order adaptive optics (AO) systems possessing several thousand deformable mirror (DM) actuators. These systems typically rely on integrator-based control...

Briefs: Photonics/Optics
One-Micron (1064-nm) Planar External Cavity Laser (PLANEX)

Ahighly reliable, very low-phase, and low-amplitude-noise laser is required as an oscillator for the LISA mission. A commercial product made by Redfern Integrated Optics met these requirements (1550-nm PLANEX External Cavity Laser), but it operated at 1.5 microns, not the required LISA...

Briefs: Test & Measurement
Method of Adjusting Acoustic Impedances for Impedance-Tunable Acoustic Segments

NASA’s Langley Research Center researchers have developed an adaptive noise-reduction system that optimizes impedance in an aircraft engine. Aerospace and automotive engineers can take advantage of this innovative system that offers a superior approach to noise...

Briefs: Medical

NASA’s Langley Research Center has developed ZONE, an innovative method for improving athletes’ responses to stress, anxiety, and loss of...

Briefs: Software

NASA’s Langley Research Center has developed a space-allocation and planning software system to allow for more effective and efficient facility usage. It also provides...

Briefs: Software

NASA has developed a new software tool for optimizing interior layout designs of highly constrained, highly integrated, and/or confined...

Who's Who: Aerospace

Stevan Spremo is the project manager of COTSAT-1, or Cost Optimized Test of Spacecraft Avionics and Technologies. The ongoing development project aims to build...

Briefs: Imaging

High-performance thermal imagers like Mars Climate Sounder (MCS) on the Mars Reconnaissance Orbiter (MRO) and the Diviner Lunar Radiometer Experiment on the Lunar...

Briefs: Manufacturing & Prototyping
A Statistically Based Approach to Broadband Liner Design and Assessment

The broadband component of fan noise has grown in relevance with the utilization of increased bypass ratio and advanced fan designs. Thus, while the attenuation of fan tones remains paramount, the ability to simultaneously reduce broadband fan noise levels has become more...

Briefs: Information Technology
Robustness Analysis and Robust Design of Uncertain Systems

A methodology was developed for the analysis and design of systems subject to parametric uncertainty in which design requirements are specified via hard inequality constraints. Hard constraints are those that must be satisfied for all parameter realizations within a given uncertainty...

Briefs: Software
Testing Encapsulation of Internet, DTN, and LTP Traffic over AOS Space Data Link Protocol

The CCSDS ENCAP Over AOS Over UDP software engine encapsulates live Internet Protocol (IP), DTN Bundle Protocol (BP), or Licklider Transport Protocol (LTP) traffic over a Consultative Committee for Space Data Systems (CCSDS)-compliant Encapsulation Ser vice...