Briefs: Medical
Optoelectronic pH Meter: Further Details

A collection of documents provides further detailed information about an optoelectronic instrument that measures the pH of an aqueous cell-culture medium to within ±0.1 unit in the range from 6.5 to 7.5. The instrument at an earlier stage of development was reported in “Optoelectronic Instrument...

Briefs: Mechanical & Fluid Systems
X-38 Advanced Sublimator

A document discusses a heat rejection device for transferring heat from a space vehicle by venting water into space through the use of a novel, two-stage water distribution system. The system consists of two different, porous media that stop water-borne contaminants from clogging the system and causing operational...

Briefs: Physical Sciences
Solar Simulator Represents the Mars Surface Solar Environment

A report discusses the development of a Mars surface, laboratory-based solar simulator to create solar cells that can function better on Mars. The Mars Optimized Solar cell Technology (MOST) required defining the surface incident spectrum, developing an appropriate laboratory solar...

Briefs: Medical

The separation of serum or plasma from whole blood is of overriding importance in clinical chemistry. In particular, many diagnostic detection reactions of blood components...

Briefs: Software
Quantifying Therapeutic and Diagnostic Efficacy in 2D Microvascular Images

VESGEN is a newly automated, userinteractive program that maps and quantifies the effects of vascular therapeutics and regulators on microvascular form and function. VESGEN analyzes two-dimensional, black and white vascular images by measuring important vessel morphology...

Briefs: Physical Sciences
Solar Rejection Filter for Large Telescopes

To reject solar radiation photons at the front aperture for large telescopes, a mosaic of large transmission mode filters is placed in front of the telescope or at the aperture of the dome. Filtering options for effective rejection of sunlight include a smaller filter down-path near the focus of the...

Briefs: Electronics & Computers
Free-Space Optical Interconnect Employing VCSEL Diodes

Sensor signal processing is widely used on aircraft and spacecraft. The scheme employs multiple input/output nodes for data acquisition and CPU (central processing unit) nodes for data processing. To connect 110 nodes and CPU nodes, scalable interconnections such as backplanes are desired...

Who's Who: Materials

Jeff Ding introduced friction stir welding (FSW) to NASA in 1995. He currently holds 6 U.S. patents for FSW, including one for an automatic retractable pin tool that...

Briefs: Energy

SiGe is an important semiconductor alloy for high-speed field effect transistors (FETs), high-temperature thermoelectric devices, photovoltaic solar cells, and...

Articles: Software
Changing Roles in a Challenging Environment

In our annual poll of executives at leading analysis and simulation software companies, we posed questions dealing with virtual prototyping, the...

NASA Tech Needs

Stennis Space Center is NASA’s primary center for rocket engine testing. The facilities include large test stands built for the Apollo Program that are being used to test Space Shuttle Main...

Products: Electronics & Computers

General Micro Systems (Rancho Cucamonga, CA) has introduced the “Raider” S705 Core 2 Duo®-based system. Raider is based on the GMS P70x module, a Core 2 Duo processor providing up to 2.16 GHz of power and 4 MB...

Products: Electronics & Computers

Unitronics (Quincy, MA) has added the V570-57-T20B to the company’s Vision570™ series of 5.7” Color Touchscreen PLCs. The model is lower in cost and has a white LED instead of fluorescent display backlight. The...

Products: Electronics & Computers

Stealth.com Inc. (Ontario, Canada) has released the Stealth TT-840, a rugged, environmentally sealed LCD monitor for harsh environments. The TT-840 is an 8.4 inch sunlight-readable LCD encapsulated in a...

Products: Electronics & Computers

The TX37 Freescale i.MX37 processor-based System on Module (SOM) from Strategic Test (Woburn, MA) measures just 67.6mm x 26mm x 4.2 mm. It contains a 532 MHz i.MX37 processor coupled with 128 MB mobile DDRSDRAM,...

Products: Electronics & Computers

Advantech (Cincinnati, OH) introduces the TPC-1780H, a 17" SXGA TFT LCD fanless touch panel PC with an Intel® Core™ 2 Duo CPU. The TPC-1780H provides one extension slot, such as RS-422/485, PCI-104, and...

Products: Electronics & Computers

Xilinx (San Jose, CA) introduces the ISE® Design Suite 11.1, an FPGA design solution with fully interoperable domain-specific design flows and tool configurations for logic, digital signal processing (DSP), embedded...

Products: Electronics & Computers

Fairchild Semiconductor (San Jose, CA) has introduced the RD212, a 200W DC/DC power supply reference design that offers high efficiency (up to 94 percent), and low noise characteristics due to its zero voltage...

Articles: Electronics & Computers

The trick to exploiting the ultra lowpower characteristics of microcontrollers with 100 nA sleep mode power consumption is to keep them in sleep mode as much as possible. The problem is...

Articles: Electronics & Computers

Much confusion exists about characterizing the performance of a highspeed digitizer device. Nominal vertical resolution is routinely presented as an indicator of a digitizer’s...

Articles: Electronics & Computers

Designing a versatile data acquisition (DAQ) system begins by comparing features of the signal of interest to the capabilities of current state-of-the-art A/D converters. Specifically, signal...

Briefs: Information Technology
Progressive Classification Using Support Vector Machines

An algorithm for progressive classification of data, analogous to progressive rendering of images, makes it possible to compromise between speed and accuracy. This algorithm uses support vector machines (SVMs) to classify data. An SVM is a machine learning algorithm that builds a...

Briefs: Information Technology
Active Learning With Irrelevant Examples

An improved active learning method has been devised for training data classifiers. One example of a data classifier is the algorithm used by the United States Postal Service since the 1960s to recognize scans of handwritten digits for processing zip codes. Active learning algorithms enable rapid training...

Articles: Photonics/Optics

A nearly geometric growth in the data requirements for many machine vision applications is pushing 32-bit processing to its limits. The challenge is not in processing power, however, but in addressing memory...

Application Briefs: Photonics/Optics

For 3D viewing to be convenient on small, portable devices, it must be autostereoscopic, thus eliminating the requirement for 3D “glasses.” The display devices must also provide 2D and 3D...

Briefs: Photonics/Optics
Solar Rejection Filter for Large Telescopes

To reject solar radiation photons at the front aperture for large telescopes, a mosaic of large transmission mode filters is placed in front of the telescope or at the aperture of the dome. Filtering options for effective rejection of sunlight include a smaller filter down-path near the focus of the...

Briefs: Photonics/Optics
Free-Space Optical Interconnect Employing VCSEL Diodes

Sensor signal processing is widely used on aircraft and spacecraft. The scheme employs multiple input/output nodes for data acquisition and CPU (central processing unit) nodes for data processing. To connect 110 nodes and CPU nodes, scalable interconnections such as backplanes are desired...

Briefs: Photonics/Optics

Two recipes for ensuring critical coupling between a single-mode optical fiber and a whispering-gallery-mode (WGM) optical resonator have been devised. The recipes provide for phase...

Products: Photonics/Optics

Marshall’s Industrial and Security Division (El Segundo, CA) has developed a new series of pinhole lenses designed to protect employees when monitoring high temperature and/or hostile...

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