November 2013

Briefs: Sensors/Data Acquisition
Rapid Detection of Herpes Viruses for Clinical Applications

There are eight herpes viruses that infect humans, causing a wide range of diseases resulting in considerable morbidity and associated costs. Varicella zoster virus (VZV) is a human herpes virus that causes chickenpox in children and shingles in adults. Approximately 1,000,000 new cases...

Briefs: Sensors/Data Acquisition
High-Speed Data Recorder for Space, Geodesy, and Other High-Speed Recording Applications

A high-speed data recorder and replay equipment has been developed for reliable high-data-rate recording to disk media. It solves problems with slow or faulty disks, multiple disk insertions, high-altitude operation, reliable performance using COTS hardware,...

Briefs: Software
Datacasting V3.0

Datacasting V3.0 provides an RSS-based feed mechanism for publishing the availability of Earth science data records in real time. It also provides a utility for subscribing to these feeds and sifting through all the items in an automatic manner to identify and download the data records that are required for a specific...

Briefs: Electronics & Computers
Stacked Transformer for Driver Gain and Receive Signal Splitting

In a high-speed signal transmission system that uses transformer coupling, there is a need to provide increased transmitted signal strength without adding active components. This invention uses additional transformers to achieve the needed gain. The prior art uses stronger drivers...

Heterodyne receivers at submillimeter wavelengths have played a major role in astrophysics as well as Earth and planetary remote sensing....

Briefs: Electronics & Computers
Wireless Integrated Microelectronic Vacuum Sensor System

NASA Stennis Space Center’s (SSC’s) large rocket engine test facility requires the use of liquid propellants, including the use of cryogenic fluids like liquid hydrogen as fuel, and liquid oxygen as an oxidizer (gases which have been liquefied at very low temperatures). These fluids...

Briefs: Manufacturing & Prototyping
Fabrication Method for LOBSTER-Eye Optics in Silicon

Soft x-ray optics can use narrow slots to direct x-rays into a desirable pattern on a focal plane. While square-pack, square-pore, slumped optics exist for this purpose, they are costly. Silicon (Si) is being examined as a possible low-cost replacement. A fabrication method was developed for...

Briefs: Electronics & Computers
Compact Focal Plane Assembly for Planetary Science

A compact radiometric focal plane assembly (FPA) has been designed in which the filters are individually co-registered over compact thermopile pixels. This allows for construction of an ultralightweight and compact radiometric instrument. The FPA also incorporates micromachined baffles in order...

Briefs: Manufacturing & Prototyping
Fabrication Methods for Adaptive Deformable Mirrors

Previously, it was difficult to fabricate deformable mirrors made by piezoelectric actuators. This is because numerous actuators need to be precisely assembled to control the surface shape...

Using thousands of nanometer-scale wires, researchers at the Georgia Institute of Technology have developed a sensor device that converts mechanical pressure – from a signature or...

Briefs: Mechanical & Fluid Systems
A Kinematic Calibration Process for Flight Robotic Arms

The Mars Science Laboratory (MSL) robotic arm is ten times more massive than any Mars robotic arm before it, yet with similar accuracy and repeatability positioning requirements. In order to assess and validate these requirements, a higher-fidelity model and calibration processes were...

Commercial uses for ultraviolet (UV) light are growing, and now a new kind of LED under development at The Ohio State University could lead to more portable and low-cost...

Briefs: Mechanical & Fluid Systems
Magnetostrictive Alternator

This innovation replaces the linear alternator presently used in Stirling engines with a continuous-gradient, impedance-matched, oscillating magnetostrictive transducer that eliminates all moving parts via compression, maintains high efficiency, costs less to manufacture, reduces mass, and eliminates the need for a...

Crash risks while driving at night are higher than during the daytime, but most roadways in the U.S. do not have roadway lighting. In fact, many state and local governments find...

Briefs: Mechanical & Fluid Systems
High-Precision Encoders for GEO Space Applications

High-precision encoders are used by earth observation instruments and in mechanisms for laser communication terminals (LCTs). A micro-radian resolution encoder for the LCT was designed for...

Researchers in Japan have developed a new type of photodiode that can detect in just milliseconds a certain type of high-energy ultraviolet light, called UVC, which is powerful...

Tiny silicon crystals caused no health problems in monkeys three months after large doses were injected, marking a step forward in the quest to bring such materials into clinics as...

Green Tech Energy Services, working in conjunction with its client, the Allentown Parking Authority, needed lighting fixtures in a multi-level parking garage in Allentown, Pennsylvania....

This product is an efficient concrete waterproofing solution. The crystalline, anti-corrosive material features a patented eka-molecular-sieve structure. The cement-based material...

Aboard a state-of-the-art aircraft might be the last place you would think of yourself enjoying a warm “candlelit” dinner, followed by a good night’s sleep under a starry night sky. The...

Aqueous Superabsorbent Coating (ASC) technology is a liquid polymer solution that dries to form an absorbent film. It can absorb up to 40 g/g by weight of water, depending on...

When it comes to high-power lighting applications in the military and harsh industrial environments, reliability and efficiency are key features to consider. To maximize both of these...

Mechanisms are used widely in engineering applications due to their ability to translate force and movement. They are found in kinematic pairs, gears, cams, linkages,...

The Energy Policy and Conservation Act of 1975 and its subsequent amendments established minimum efficiency standards for lighting products. While the...

Briefs: Medical
Detection of Only Viable Bacterial Spores Using a Live/Dead Indicator in Mixed Populations

This method uses a photoaffinity label that recognizes DNA and can be used to distinguish populations of bacterial cells from bacterial spores without the use of heat shocking during conventional culture, and live from dead bacterial spores using...

Products: Lighting
40W Waterproof LED Drivers

Phihong USA (Fremont, CA) recently introduced a new series of waterproof LED drivers for use in a broad range of residential and commercial applications. Designated the PDA040 series, the LED power supplies are...

Briefs: Medical
Intravenous Fluid Generation System

The ability to stabilize and treat patients on exploration missions will depend on access to needed consumables. Intravenous (IV) fluids have been identified as required consumables. A review of the Space Medicine Exploration Medical Condition List (SMEMCL) lists over 400 medical conditions that could present...

Products: Lighting
LED Drivers

Dialog Semiconductor plc (Kirchheim/Teck, Germany) has announced a new solid state lighting (SSL) LED driver that integrates boost and flyback converters into a single IC. The iW3623 offers a universal 100 VAC to 277 VAC input...

Products: Lighting
LED Direct Replacement Bulb

The Verde Series LED GU24 direct replacement lamp by American Illumination (Los Angeles, CA) is one of the few GU24 direct replacement light bulbs available, and is the only one compatible with the GU24 locking...

Dassault Systèmes, Paris, France, has introduced the SolidWorks® 2014 3D software portfolio that consists of 3D CAD, simulation, product data management, technical...

In the “old” days when high speed cameras used film, there was a very definite period of time in which the event one wished to record had to occur. This was between the point at which the...

Application Briefs: Photonics/Optics
Projected-Capacitive Touch Sensing Technology

Projected-capacitive (PCAP) touch sensing technology is rapidly evolving to meet the advanced user-interface needs of modern applications. Popular consumer products that use multitouch and...

Briefs: Photonics/Optics
Slowing Light Via Beam Coupling in Dye-Doped Chiral Nematics

Apart from the fundamental interest of discovering the physical effects that are behind the light-matter interaction processes that make it possible, slowing and storing light currently attracts a lot of attention because the ability to control the propagation speed of optical pulses,...

Products: Photonics/Optics
Full HD Autofocus 8MP USB 3.0 Camera

e-con Systems Inc. (St. Louis, MO) has launched the See3CAM_80, part of the See3CAM family of USB3.0 SuperSpeed cameras. The See3CAM_80 supports video streaming at resolutions of up to 1080p@30fps and...

Products: Photonics/Optics
Board-Level Camera

Equipped with the CMV300 VGA sensor from CMOSIS, Baumer’s (Southington, CT) new MXG03 board-level camera delivers very high frame rates up to 250 frames/s and can be integrated into extremely small spaces. The camera...

Products: Photonics/Optics
Optical Triggers

Specialised Imaging Ltd. (Tring, UK) has been assigned the worldwide rights by SFW (El Cajon, CA, USA) to manufacture and market its new range of optical triggers. The already highly reliable OT-series trigger has been...

Products: Photonics/Optics
Mid-IR Transport Fiber

NP Photonics Inc. (Tucson, AZ) has introduced a mid-infrared (IR) transport fiber that offers high transparency across the visible and mid-infrared (400 nm to 4500 nm) and has been designed to be mechanically robust....

Products: Photonics/Optics
3D Weld Seam Inspection Software

New EyeVision 3.0 software from EVT Eye Vision Technology GmbH (Karlsruhe, Germany) performs automated 3D inspection of weld seams and stores the results for further processing. The following metrical...

Products: Photonics/Optics
Vision System Frame Grabber

BitFlow, Inc. (Boston, MA) has introduced the Cyton™ CXP4 fourchannel frame grabber based on the CoaXPress standard. Key to its success is the incorporation of the Gen 2.0 x8 PCI Express bus interface on its...

Products: Photonics/Optics
Sub-Nanosecond Solid-State Lasers

The new Helios series of sub-nanosecond solid-state lasers from Coherent, Inc. (Santa Clara, CA) offer a pulse repetition frequency of 50 kHz and a pulsewidth of <600 ps. Specific applications include scribing of both thin-film and c-Si solar cells (e.g. selective opening of anti-reflection or passivation...

Articles: Software
Ethernet in the Embedded Space

Networking originated from the need to share information. Many of us accomplish such a thing on a daily basis through conversation. For example, think about the typical office framework: you work side-by-side...

Application Briefs: Robotics, Automation & Control
Vision-Based Robot Design Wins NASA Test Course Challenge

As part of a NASA test course challenge, Teledyne DALSA engineered a winning Miniature Autonomous Roving Vehicle (MARV), earning the company a $350M contract with NASA’s Marshall...

Scientists have long attempted to convert the enormous amounts of waste heat generated by power plants, data centers, and cars into electricity via thermoelectric power generators...

Application Briefs: Software
Software Tool Analyzes C/C++ Code

GrammaTech, a software developer specializing in software assurance tools and cybersecurity technology, received an award from NASA to prototype a specification editing and discovery tool (SPEEDY) for C/C++...

In the 1990s, Heinz Erzberger led a team at NASA’s Ames Research Center in California to develop a suite of automated tools to reduce restrictions and improve the efficiency of air traffic...

ChemoPatch™ Alydaar Rangwala, Nikhil Mehandru,
Aaron Perez, and Brandon Sim
Theratech, Loudonville, NY

The world is facing a global cancer crisis. In 2011, 13.7 million new...

Microwave Extraction of Water for Space Propellant Edwin Ethridge, Ph.D.
NASA (retired),
Huntsville, AL

Space exploration is extremely expensive because very...

Plant Air Purifier James Schaeffer, Bill Wolverton, Wayne Schaeffer, and Bernarr Schaeffer
U.S. Health Equipment Co.,
Kingston, NY

The Plant Air Purifier is a...

iPecs Pro Clinical Prosthetic Alignment and Assessment Tool Michael Leydet, Richard Harrington, Alan Hutchenreuther, Vinay Bharadwaj,
Chuck Krapf, Michael Link, Megan Toscas,...
Vitalflo James Dieffenderfer, Mike Brown, and Leigh Johnson
North Carolina State University,
Apex, NC

Over 25 million Americans have been diagnosed with asthma, and of...

Power Fingerprinting Monitor: Protecting Critical Infrastructure from Cyber Attack Carlos R. Aguayo Gonzalez, Jeffrey H. Reed, and Steven Chen
Power Fingerprinting,...
The Paradigm Shift in Wind Turbine Technology Glen Lux
Lux Wind Power Ltd., Saskatoon, Saskatchewan, Canada

Imagine a renewable energy source that can produce...

Swift Tram: High Speed Automated People Mover Carl Lawrence, Becky English,
Graham Hill, John Murino,
Elaine Thorndike, Gaby Aweida,
Carl...
Fuel Flexible, Ultra-Portable Microturbine Generator Erik Herold, Jason Ethier, and Ivan Wang
Dynamo Micropower,
Boston, MA

A large unmet need in the oil...

Articles: Transportation
2013 Create the Future Design Contest

The 2013 Create the Future Design Contest — sponsored by COMSOL, SAE International, and Tech Briefs Media Group (publishers of NASA Tech Briefs) — recognized innovation in product design in eight categories: Aerospace & Defense (new this year), Consumer Products, Electronics, Machinery &...

Solar panels are normally positioned at a fixed position. If a panel uses a tracking system to follow the movement of the Sun, however, more solar energy can be collected. Instead of having...

Most individuals experience bad breath (malodor or halitosis) occasionally, but few people can selfdiagnose when it occurs. Proto - types and initial human trial clinical tests have been completed on a...

Tech Needs
Natural Food Actives for Positive Mood Enhancement

The overall consumer experience of foods is impacted by various sensory factors including taste, texture, and smell, as well as by ingredients that occur naturally in various foods, which can directly impact one’s mood. Food additives also affect various mood neuro-actives, such as serotonin,...

Tech Needs
New Systemic Chemical Insecticides

A client seeks new synthetic (chemical-based) control agents for insects such as aphids and spider mites. The piercing and sucking insects damage plants by inserting their mouthpart into plant tissues and feeding on the juices. Heavily infested plants become yellow, wilted, deformed, or stunted, and may...

Dr. Butler Hine is the project manager of the Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft. The vehicle, successfully launched in September,...

Podcasts
Butler Hine, Project Manager, LADEE, Ames Research Center, Moffett Field, CA

Dr. Butler Hine is the project manager of the Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft. The vehicle, successfully launched in September, will characterize the dust environment of the moon.

News
Engineers Develop Real-Time, 3D Teleconferencing

Nik Karpinsky quickly tapped out a few computer commands until Zeus, in all his bearded and statuesque glory, appeared in the middle of a holographic glass panel mounted to an office desk.

The white statue stared back at Karpinsky. Then a hand appeared and turned the full-size head to the right...

News
Researchers Discover Self-Healing Metal Properties

It was a result so unexpected that MIT researchers initially thought it must be a mistake: Under certain conditions, putting a cracked piece of metal under tension — that is, exerting a force that would be expected to pull it apart — has the reverse effect, causing the crack to close and its...

Briefs: Software
Visiting Vehicle Ground Trajectory Tool

The International Space Station (ISS) Visiting Vehicle Group needed a targeting tool for vehicles that rendezvous with the ISS. The Visiting Vehicle Ground Trajectory targeting tool provides the ability to perform both realtime and planning operations for the Visiting Vehicle Group. This tool provides a...

Briefs: Software
Mobile Thread Task Manager

The Mobile Thread Task Manager (MTTM) is being applied to parallelizing existing flight software to understand the benefits and to develop new techniques and architectural concepts for adapting software to multicore architectures. It allocates and load-balances tasks for a group of threads that migrate across...

Briefs: Software
Workflow-Based Software Development Environment

The Software Developer’s Assistant (SDA) helps software teams more efficiently and accurately conduct or execute software processes associated with NASA mission-critical software. SDA is a process enactment platform that guides software teams through project-specific standards, processes, and...

Global Positioning System (GPS) meteorology provides enhanced density, low-latency (30-min resolution), integrated precipitable water (IPW) estimates to NOAA NWS...

Briefs: Information Technology
Spatial Statistical Data Fusion (SSDF)

As remote sensing for scientific purposes has transitioned from an experimental technology to an operational one, the selection of instruments has become more coordinated, so that the scientific community can exploit complementary measurements. However, technological and scientific heterogeneity across...

Briefs: Information Technology
Spatial Statistical Data Fusion (SSDF)

As remote sensing for scientific purposes has transitioned from an experimental technology to an operational one, the selection of instruments has become more coordinated, so that the scientific community can exploit complementary measurements. However, technological and scientific heterogeneity across...

Briefs: Sensors/Data Acquisition
Cryogenic Liquid Sample Acquisition System for Remote Space Applications

There is a need to acquire autonomously cryogenic hydrocarbon liquid sample from remote planetary locations such as the lakes of Titan for instruments such as mass spectrometers. There are several problems that had to be solved relative to collecting the right amount of...

Briefs: Sensors/Data Acquisition
Integrating a Microwave Radiometer into Radar Hardware for Simultaneous Data Collection Between the Instruments

The conventional method for integrating a radiometer into radar hardware is to share the RF front end between the instruments, and to have separate IF receivers that take data at separate times. Alternatively, the radar and radiometer...

News
Researchers Draw Liquid with Light

Researchers from the University of Helsinki's Department of Chemistry have manufactured photochemically active polymers which can be dissolved in water or certain alcohols.

The effect where light causes the polymer to dissolve completely and be made visible can last several hours depending, for example, on...

News
Army Looks to Integrate Cyber and Electronic Warfare Capabilities

As new technologies emerge and new cyber and electronic warfare threats plague soldiers in the field, U.S. Army scientists and engineers continue to define next-generation protocols and system architectures to help develop the technology to combat these threats in an integrated...

News
Using Sound Waves For Bomb Detection

A remote acoustic detection system designed to identify homemade bombs can determine the difference between those that contain low-yield and high-yield explosives. That capability – never before reported in a remote bomb detection system – was recently described in a paper by Vanderbilt engineer Douglas...

News
Dolphin-Inspired Radar Detects Hidden Explosive Devices

Inspired by the way dolphins hunt using bubble nets, scientists at the University of Southampton, in collaboration with University College London and Cobham Technical Services, have developed a new kind of radar that can detect hidden surveillance equipment and explosives. The twin inverted...

News: Green Design & Manufacturing
Wireless Device Converts 'Lost' Energy into Electric Power

Using inexpensive materials configured and tuned to capture microwave signals, researchers at Duke University’s Pratt School of Engineering have designed a power-harvesting device with efficiency similar to that of modern solar panels.

The device wirelessly converts the microwave...

News: Green Design & Manufacturing
Researchers Print Electrical Circuits

Researchers from Georgia Tech, the University of Tokyo, and Microsoft Research have developed a novel method to rapidly and cheaply make electrical circuits by printing them with commodity inkjet printers and off-the-shelf materials.

For about $300 in equipment costs, anyone can produce working electrical...

News
New Motion Tracking Technology Reduces Lag

Researchers at Carnegie Mellon University and Disney Research Pittsburgh have devised a motion tracking technology that could eliminate much of the annoying lag that occurs in existing video game systems that use motion tracking, while also being extremely precise and highly affordable.

Called...

News
Anechoic Chamber Creates Perfect Silent Test Environment

Silence isn’t just golden, it’s an absolute necessity for Binghamton University Professor Ron Miles. Miles’ current work involves building a better hearing aid, and for that he needs an extraordinarily quiet room. The University’s new anechoic chamber (a room without echo) is the...

News
Optical Sensors Improve Railway Safety

A string of fiber-optic sensors running along a 36-km stretch of high-speed commuter railroad lines connecting Hong Kong to mainland China has taken more than 10 million measurements over the past few years in a demonstration that the system can help safeguard commuter trains and freight cars against...

Question of the Week
Will You Talk and Text in the Air?

An in-flight service from Gogo allows travelers to text and talk as if they are on the ground. By using the company's air-to-ground connectivity, calls and texts are routed through the aircraft's wireless network rather than in-flight cell towers, or "picocells."

News: Green Design & Manufacturing
Clams and Snails Inspire Robotic Crawlers

Researchers have created a “RoboSnail,” which can climb walls and stick to overhead surfaces much like its living counterpart. Such a device has potential uses in invasive surgery and oil well drilling, among other applications.

The researchers found that, while digging, the clam’s up-and-down...

News: Green Design & Manufacturing
Researchers Develop Effective Cooling Method for Hot Surfaces

MIT researchers have come up with a way to cool hot surfaces more effectively by keeping droplets from bouncing. Their solution: Decorate the surface with tiny structures and then coat it with particles about 100 times smaller. Using that approach, they produced textured surfaces...

News: Green Design & Manufacturing
Professor Invents Flexible Battery

Researchers at NJIT have developed a flexible battery made with carbon nanotubes that could potentially power electronic devices with flexible displays.

Electronic manufacturers are now making flexible organic light-emitting diode (OLED) displays, a pioneering technology that allow devices such as cell...

News
Digitized Touch Could Revolutionize Communications

Researchers at the University of California, San Diego report a breakthrough in technology that could pave the way for digital systems to record, store, edit and replay information in a dimension that goes beyond what we can see or hear, namely touch.

“Touch was largely bypassed by the...

News
New Device Stores Electricity On Silicon Chips

Solar cells that produce electricity 24/7, not just when the sun is shining, or mobile phones with built-in power cells that recharge in seconds and work for weeks between charges. These are just two of the possibilities raised by a novel supercapacitor design invented by material scientists at...

Question of the Week
Would You Use an All-In-One 'Coin?'

A San Francisco startup introduced an all-in-one card, called Coin, meant to store financial information from every other card carried in a wallet. The device, available for preorder, includes a magnetic strip that can change depending on what card one wants to use. What do you think? Would you use an...

News: Green Design & Manufacturing
Water-Splitting Device Generates Electricity

Stanford researchers have developed an inexpensive device that uses light to split water into oxygen and clean-burning hydrogen. The goal is to supplement solar cells with hydrogen-powered fuel cells that can generate electricity when the sun isn't shining or demand is high.

Two semiconducting...

News: Software
NASA Software Offers Pilots the Best Path

NASA-developed computer software could help aircraft operators save time and fuel by allowing technology in the cockpit to help determine the most efficient flight paths while planes are in the air - in traffic - en route to their destinations.

A concept called Traffic Aware Strategic Aircrew Requests,...

News
Simulation Helps Predict Life Expectancy of Solar Modules

Solar panel modules must fulfill certain standards to be approved for operation. This involves exposing them to high temperatures and high mechanical loading. However, the results only predict something about the robustness of a brand-new sample with respect to extreme, short-term...

News
Analysis Explains Shifting Winds in Turbine Arrays

Researchers modeling how changes in air flow patterns affect wind turbine output power have found that the wind can supply energy from an unexpected direction: below. The researchers introduced a mathematical way to measure changes in the flow that gives a more accurate representation of the...

News
NASA Researchers Get Flying Insects to Bug Off Airplane Wings

A bee and a jumbo jet: common sense would tell you that the tiny insect couldn't possibly cause any troubles for the massive airplane, right? Actually, no. Bees can cause trouble. When flying insects get in the way of an airplane's wing during takeoff or landing, it's not just the...

News
Crashing Rockets Could Lead to Novel Sample-Return Technology

During spring break the last five years, a University of Washington class has headed to the Nevada desert to launch rockets and learn more about the science and engineering involved. Sometimes, the launch would fail and a rocket smacked hard into the ground. This year, the session...

News
Wrangling Flow to Quiet Future Aircraft

Plasmas are a soup of charged particles in an electric field, and are normally found in stars and lightning bolts. With the use of high voltage equipment, very small plasmas can be used to manipulate fluid flows. In recent years, the development of devices known as plasma actuators has advanced the promise...

News
Army and University Study Could Improve Aviation Vibration Testing

Results from a recent study that looked at how battlefield-born vibrations, like those from blasts and heavy armored vehicles, for example, are leading research scientists to rethink military vehicle testing and evaluation methods that could also, eventually, improve automotive...

News: Green Design & Manufacturing
Engineers Develop Faster 3D Printing Process

Although 3D printing — or direct digital manufacturing — has the potential to revolutionize various industries by providing faster, cheaper, and more accurate manufacturing options, fabrication time and the complexity of multimaterial objects have been a longtime hurdle to its widespread use in...

News: Green Design & Manufacturing
2D Tin Conducts Electricity with 100-Percent Efficiency

A single layer of tin atoms could be the world’s first material to conduct electricity with 100 percent efficiency at the temperatures that computer chips operate, according to a team of theoretical physicists led by researchers from the U.S. Department of Energy’s (DOE) SLAC National...

News
Army Scientists Improve Methods of Detecting, Decontaminating Ricin

An envelope laced with ricin intended for the president of the United States was recently intercepted by law enforcement officials when protocols established for mail screenings revealed the threat of a biological weapon. Ricin is a highly toxic, naturally occurring protein...

News
New Inspection System Ensures Safer Body Armor

Soldiers who have deployed in support of Operation Enduring Freedom, Operation Iraqi Freedom or Operation New Dawn, have the shared experience of being issued ballistic plates for their body armor that have been turned in by other soldiers after their combat tours. Part of ensuring plates are combat...

News
Naval Research Laboratory Advances Green Technologies

Naval Research Laboratory’s (NRL) benthic microbial fuel cell (BMFC) extracts electricity from the sea floor using the natural decomposition process of sediment. Most current scientific sensors in the marine environment are battery-powered, but the BMFC offers an attractive alternative to a...

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