Keyword: Sun and solar

Articles: Lighting

Glass and transparent plastics, especially acrylic resins, have long been used in the lighting industry for various aesthetic and functional purposes. As the industry has evolved,...

Briefs: Energy

An enhanced thin-film silicon photovoltaic device with improved efficiency has been developed. Thin-film silicon solar cells suffer from low material absorption...

Briefs: Materials
Variable Emittance Electrochromics Using Ionic Electrolytes and Low Solar Absorptance Coatings

One of the last remaining technical hurdles with variable emittance devices or skins based on conducting polymer electrochromics is the high solar absorptance of their top surfaces. This high solar absorptance causes overheating of the skin when facing...

Briefs: Electronics & Computers

The High Altitude Airship (HAA) has various application potential and mission scenarios that require onboard energy harvesting and power distribution systems. The power...

Briefs: Physical Sciences
Non-Contact Thermal Properties Measurement With Low-Power Laser and IR Camera System

As shown by the Phoenix Mars Lander’s Thermal and Electrical Conductivity Probe (TECP), contact measurements of thermal conductivity and diffusivity (using a modified flux-plate or line-source heat-pulse method) are constrained by a number of factors. Robotic...

Briefs: Software
Java Image I/O for VICAR, PDS, and ISIS

This library, written in Java, supports input and output of images and metadata (labels) in the VICAR, PDS image, and ISIS-2 and ISIS-3 file formats. Three levels of access exist.

Briefs: Information Technology
Rapid Calculation of Spacecraft Trajectories Using Efficient Taylor Series Integration

A variable-order, variable-step Taylor series integration algorithm was implemented in NASA Glenn’s SNAP (Spacecraft N-body Analysis Program) code. SNAP is a high-fidelity trajectory propagation program that can propagate the trajectory of a spacecraft about...

Briefs: Manufacturing & Prototyping

An involute-foil regenerator was designed, microfabricated, and tested in an oscillating-flow test rig. The concept consists of stacked involute-foil nickel disks (see...

Articles: Green Design & Manufacturing

(Winner of an HP Workstation)

Sustainable, Durable Bridges of the Future

Ibrahim Al-Khattat

Talacre, Wales, United Kingdom

Alight,...

Articles: Manufacturing & Prototyping
2010 Create the Future Design Contest Meet the Judges

COMSOL, PTC, and Tech Briefs Media Group thank the following judges for their participation.

Techs for License: Lighting

Current white light generation techniques rely on color mixing from red, blue, and green light. While reasonable red and blue light-emitting diodes (LEDs) are available for this scheme, there...

Application Briefs: Software
Geomagic Studio 3D scanning and processing software
Geomagic Inc.
Research Triangle Park, NC
800-691-1839
www.geomagic.com

Ceramic tiles...

Briefs: Electronics & Computers
Method and Circuit for In-Situ Health Monitoring of Solar Cells in Space

This innovation represents a method and circuit realization of a system designed to make in-situ measurements of test solar-cell operational parameters on orbit using readily available high-temperature and high-ionizing-radiation-tolerant electronic components. This...

Briefs: Materials
InGaP Heterojunction Barrier Solar Cells

A new solar-cell structure utilizes a single, ultra-wide well of either gallium arsenide (GaAs) or indium-galliumphosphide (InGaP) in the depletion region of a wide bandgap matrix, instead of the usual multiple quantum well layers. These InGaP barrier layers are effective at reducing diode dark current,...

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: Software
Momentum Management Tool for Low-Thrust Missions

A momentum management tool was designed for the Dawn low-thrust interplanetary spacecraft en route to the asteroids Vesta and Ceres, in an effort to better understand the early creation of the solar system. Momentum must be managed to ensure the spacecraft has enough control authority to perform...

Briefs: Software
Numerical Mean Element Orbital Analysis With Morbiter

The Morbiter software numerically averages an osculating orbit’s equations of motion (EOM) to arrive at the mean orbit’s EOMs, which are then numerically propagated to obtain the long-term orbital ephemerides. The long-term evolution characteristics, and stability, of an orbit are best...

Briefs: Manufacturing & Prototyping
Self-Deployable Membrane Structures

Currently existing approaches for deployment of large, ultra-lightweight gossamer structures in space rely typically upon electromechanical mechanisms and mechanically expandable or inflatable booms for deployment and to maintain them in a fully deployed, operational configuration. These support structures,...

Articles: Photonics/Optics

The basic function of a photovoltaic cell is to convert input — sunlight energy expressed in irradiance (W/m2) — into output — useable electrical power — with as little loss as possible. To...

Application Briefs: Photonics/Optics

Organic photovoltaic (OPV) materials are an emerging alternative technology for converting sunlight into electricity. OPVs are potentially inexpensive to...

Briefs: Information Technology
Charge-Spot Model for Electrostatic Forces in Simulation of Fine Particulates

The charge-spot technique for modeling the static electric forces acting between charged fine particles entails treating electric charges on individual particles as small sets of discrete point charges, located near their surfaces. This is in contrast to existing...

Application Briefs: Imaging
e2v CCD203-82 charge-coupled device sensors
e2v Technologies
Essex, United Kingdom
+44 (0)1245 493493
www.e2v.com

Six Charge-Coupled Device (CCD)...

Briefs: Physical Sciences
Simplified Vicarious Radiometric Calibration

A measurement-based radiance estimation approach for vicarious radiometric calibration of spaceborne multispectral remote sensing systems has been developed. This simplified process eliminates the use of radiative transfer codes and reduces the number of atmospheric assumptions required to perform...

Articles: Energy

In just the last few years, innovation in alternative-energy technologies have gained significant footholds in product development lifecycles and are rapidly changing our individual...

Briefs: Physical Sciences

A holographic vortex coronagraph (HVC) has been proposed as an improvement over conventional coronagraphs for use in high-contrast astronomical imaging for detecting planets, dust disks, and other broadband...

Briefs: Energy

A shielded radiator integrated within a solar concentrator was developed by Lockheed Martin Space Systems for applications that require protection from high ambient temperatures with little...

Briefs: Software
ISS Solar Array Management

The International Space Station (ISS) Solar Array Management (SAM) software toolset provides the capabilities necessary to operate a spacecraft with complex solar array constraints. It monitors spacecraft telemetry and provides interpretations of solar array constraint data in an intuitive manner. The toolset provides...

Briefs: Energy

A new thermoelectric power generator from Johnson Space Center consists of an oven box and a solar cooker/solar reflector unit. The solar reflector concentrates sunlight into heat and...

Application Briefs: Aerospace
TTEthernet
TTTech North America
Carlsbad, CA
760-603-9393
www.tttech.com

TTEthernet, a high-bandwidth databus developed by TTTech and Honeywell, will...