omniomni/omni-engineering huggingface dataset:
Cray XE6. The Cray XE6 (codename during development: Baker) made by Cray is an enhanced version of the Cray XT6 supercomputer, officially announced on 25 May 2010. The XE6 uses the same computer blade found in the XT6, with eight- or 12-core Opteron 6100 processors giving up to 3,072 cores per cabinet, but replaces the SeaStar2+ interconnect router used in the Cray XT5 and XT6 with the faster and more scalable Gemini router ASIC. This is used to provide a 3-dimensional torus network topology between nodes. Each XE6 node has two processor sockets and either 32 or 64 GB of DDR3 SDRAM memory. Two nodes share one Gemini router ASIC.

The XE6 runs the Cray Linux Environment version 3. This incorporates SUSE Linux Enterprise Server and Cray's Compute Node Linux.

References

External links

Cray XE6 product page

Xe6
X86 supercomputers
VisAD. VisAD is a Java component library for interactive and collaborative visualization and analysis of numerical data. It combines a flexible data model and distributed objects (via Java RMI) to support sharing of data, visualizations and user interfaces between different data sources, different computers and different scientific disciplines. It is licensed under the GNU LGPL.

VisAD is the basis of the Integrated Data Viewer, McIDAS V and other systems.

Bibliography
 W. Hibbard, C. Dyer and B. Paul, Display of Scientific Data Structures for Algorithm Visualization, Proc. IEEE Visualization 1992, pp. 139–146.
 W. Hibbard, Visualizing Scientific Computations: A System based on Lattice-Structured Data and Display Models, PhD Thesis, Univ. of Wisc. Comp. Sci. Dept. Tech. Report, #1226, 1995.
 W. Hibbard, VisAD: Connecting people to computations and people to people, Computer Graphics 32, No. 3, 1998, pp. 10–12.
 W. Hibbard, Building 3-D User Interface Components Using a Visualization Library, Computer Graphics 36, No. 1, 2002, pp. 4–7.
 W. Hibbard, et al., Java distributed components for numerical visualization in VisAD, Communications of the ACM 48, No. 3, 2005, pp. 98–104.

References

External links
 VisAD Home Page
 History of Vis5D and VisAD

Meteorological data and networks
Computational science
Infographics
Free data and information visualization software
Graphic software in meteorology
William T. Townsend. Bill Townsend founded Barrett Technology in 1988.  He is credited with introducing the WAM arm, the first haptic robot and one of the first haptic devices based on novel differential and high-speed cable drives.

Bill holds engineering PhD'88 and MS'84 degrees from the Massachusetts Institute of Technology and a BS'82 from Northeastern University.  He has been awarded nine US patents and won several professional awards including The Robotics Industries Association’s Joseph Engelberger Award in 2003 for pioneering the first haptic robot in the 1980s.

References

American businesspeople
Living people
Year of birth missing (living people)
Spezio Tuholer. The Spezio Sport DAL 1 Tuholer is a two-place low-wing homebuilt aircraft using tube-and-fabric construction. A folding wing is incorporated to allow for trailering.

Development
The prototype aircraft was built for $287 using tubing from a Cessna UC 78, a Tri-Pacer propeller, wheels from a TG-6 glider, a Lycoming Ground Power unit and a variety of surplus materials. The nickname came from the president of the Experimental Aircraft Association remarking that the plane was a "two holer".

Design
The Tuholer is a tandem two-seat, strut-braced, low-wing, open cockpit aircraft with conventional landing gear. The dual control aircraft can be flown solo from the rear cockpit only. The fuselage is welded steel tubing with wooden stringers and fabric covering. The dual wing spars are wood, with wood ribs and fabric covering. The fuel tank is made of fiberglass. The horizontal stabilizer uses a Piper Cub style screw jack for trim. The rear headrest can be built streamlined flush with the vertical stabilizer or tapered.

Operational history
The designer flew the prototype 16 years.

Specifications (Spezio Tuholer)

References

http://www.pilotfriend.com/experimental/acft6/38.htm

External links

 http://www.crimsonstar.com/home/hbuilt0.htm
 http://www.planeandpilotmag.com/aircraft/international-aircraft-directory/homebuiltkitbuilt-aircraft/spezio-tuholer.html

1960s United States sport aircraft
Homebuilt aircraft
Low-wing aircraft
Single-engined tractor aircraft
Aircraft first flown in 1961
Burt Doo. Burton Doo (born May 29, 1930 in Cambridge, Massachusetts) was chief operating officer at robotics company Barrett Technology from 2001 until his death on November 25, 2013. He mentored a line of protégés in the art of business.  He began his career in the GE operations management program after graduating from Boston University with a BA in management. In 1970, Doo co-founded Altron, an advanced contract manufacturer, where he served as executive vice president. In 1998 Altron merged with Sanmina, and Doo retained his position as executive vice president until his retirement in 2000.

Sources
 Barrett Technology Site

1930 births
2013 deaths
Businesspeople from Cambridge, Massachusetts
American technology executives
American chief operating officers
Boston University School of Management alumni
20th-century American businesspeople
Accuracy class. Accuracy classes are defined and used in IEC and ANSI standards.  Classes are denoted by either a letter or percentage. For example, Class B is a temperature accuracy from IEC-751 that requires accuracy of ± 0.15 degrees Celsius. Class 0.5 is an ANSI C12.20 accuracy class for electric meters with absolute accuracy better than ± 0.5% of the nominal full scale reading.

Typically, a class specifies accuracy at a number of points, with the absolute accuracy at lower values being better than the nominal "percentage of full scale" accuracy.

Accuracy classes such as IEC's 0.15s are a 'special' high accuracy class.

 Calculation for accuracy of class 1 meter:
 1600 impulse/KWh and 
 considering, P.F= 1 and LOAD = 100w
 Revolution time, 
 Rt = (3600×Kh×1)/Load(w) [Kh = 1000/(impulse/Kwh=1600)]
 Rt = (3600×0.625×1)/100
 Rt = 22.5sec [Standard]

 %of error = (Ft-Rt)/Rt

The positive or negative result indicates whether the meter is fast or slow. If the result is positive, then the meter is fast, while negative means the meter is slow.

References 

Measurement
SERVIS-1. SERVIS-1, or Space Environment Reliability Verification Integrated System 1, is a Japanese satellite designed for testing the performance of commercial off-the-shelf products in the space environment. It has a mass of about 840 kg, and was launched on 30 October 2003 from the Plesetsk Cosmodrome by Eurockot, who used a Rokot rocket with a Briz-KM upper stage. The satellite was active for two years. A second satellite, SERVIS-2, was launched in 2010.

Experiments
Nine experiments were being conducted by SERVIS-1.

Results from the mission 
All the modules on the satellite worked as planned. The mission tested a number of electronic components, and determined that the rate of single-event upsets at its 1000 km orbit was substantially less than had been expected from tests using heavy ion bombardment on the ground.

See also

2003 in spaceflight

References 

Satellites of Japan
Spacecraft launched in 2003
Spacecraft launched by Rokot rockets
Spaceborne Imaging Radar. The Spaceborne Imaging Radar (SIR) – full name 'Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar (SIR-C/X-SAR)', is a synthetic aperture radar which flew on two separate shuttle missions. Once from the Space Shuttle Endeavour in April 1994 on (STS-59) and again in October 1994 on (STS-68). The radar was run by NASA's Space Radar Laboratory. SIR utilizes 3 radar frequencies: L band (24 cm wavelength), C band (6 cm) and X band (3 cm), allowing for study of geology, hydrology, ecology and oceanography. Comparing radar images to data collected by teams of people on the ground as well as aircraft and ships using simultaneous measurements of vegetation, soil moisture, sea state, snow and weather conditions during each flight. The imaging radar was able to take images anytime regardless of clouds cover. The Radar-C system was built and operated by NASA's Jet Propulsion Laboratory (JPL). The mission was a joint work of NASA with the German and Italian space agencies. Each of the week long mission scanned about 50 million square kilometers of the Earth's surface, (19.3 million square miles).

The SIR mission revealed hidden river channels in the Sahara Desert indicating significant climate change in the past. SIR was also used for volcano research by keeping researchers a safe distance from hazardous and often inaccessible areas. The radar was also used to generate detailed three dimensional mappings of the Earth's surface.

Radar also found temples in Angkor, and ancient segments of China's Great Wall.

Specification
Orbital altitude above earth = 
The width of the imaged swath on the ground =  
C-band beamwidth = 0.25 deg. × 5 deg. 
L-band beamwidth = 1.1 deg. × 6 deg.
Scan angle range = ±23 deg. from boresight across narrow antenna direction only
Bandwidth = 10, 20 and 40 GHz
Pulse repetition rate =	1395–1736 pulses per second
Total science data = 50 hours per channel, per mission (two missions, total 100 hours) 
Total instrument mass = 
DC power consumption = 3000–9000 Watts
L-band data rate = 90 Mbit/s 	
C-band data rate = 90 Mbit/s 
X-band data rate = 45 Mbit/s
L-band wavelength = 0.235 m 	
C-band Wavelength = 0.058 m 	
X-band wavelength = 0.031 m

See also 

 Seasat – Seasat Synthetic Aperture Radar (SAR) in 1978
 STS-2 with SIR-A
 STS-41-G with SIR-B
 Shuttle Radar Topography Mission
 TerraSAR-X
 Earth Radiation Budget Satellite
 TopSat

References

Spacecraft instruments
1994 in spaceflight
Satellite meteorology
Space synthetic aperture radar
Satellite imaging sensors
Stolp Acroduster. The Acroduster I SA700 is an American single-seat homebuilt aerobatic biplane.

Development
The Acroduster was an elliptical-winged biplane built with the intention of competing against the Pitts Special.

Design
The aircraft also owes some of its design to the Midget Mustang. The fuselage is of aluminum construction rather than the popular tube and fabric for the type. The wings are similar to the Stolp Starduster. Roll rate is 240 degrees per second.

Variants
Beets Special Marketed by Stolp.

Specifications (Acroduster 1)

See also

Notes

References

Budd Davisson, Air Progress, 1975 
Sport Aviation, August 1972 pp. 38 Stolp Arcroduster
Sport Aerobatics, August 1974 pp. 14 New Unlimited Machine - Acroduster I

Acroduster
Homebuilt aircraft
Biplanes
Single-engined tractor aircraft
Single-engined piston aircraft
Aircraft with fixed conventional landing gear
Captain (videotex). The CAPTAIN system (for Character and Pattern Telephone Access Information Network system) was a Japanese videotex system created by NTT.  Announced in 1978, it was trialled from 1979 to 1981, with a second larger trial held from 1982 to 1983. The service launched commercially in November 1984.  

Captain differed from comparable European videotex systems by not being based on the transmission of alphanumeric characters.  The Japanese kanji character set has over 3,500 characters, and in the late 1970s to try to include a character generator in the user's terminal that could retain and then generate so many characters on demand was seen as prohibitive.  Instead pages were therefore substantially sent to the end user as pre-rendered images, using coding strategies similar to facsimile machines.

By December 1985, Captain had 650 information providers, and the next year was rolled out to 245 cities.  However, by March 1992, the system still only had 120,000 subscribers. 

Sanyo released a CAPTAIN adapter for MSX1 computers, and Yamaha released a similar device for the MSX2.

Like other videotex systems worldwide (with the exception of the French Minitel), it never broke through to achieve mass-market usage. The system was closed on March 31, 2002.

References

External links 
 Thanks Captain 

Videotex
Pre–World Wide Web online services
NTT Communications
Electrical network frequency analysis. Electrical network frequency (ENF) analysis is an audio forensics technique for validating audio recordings by comparing frequency changes in background mains hum in the recording with long-term high-precision historical records of mains frequency changes from a database. In effect the mains hum signal is treated as if it were a time-dependent digital watermark that can help identify when the recording was created, detect edits in the recording, or disprove tampering of a recording. Historical records of mains frequency changes are kept on record, e.g., by police in the German federal state of Bavaria since 2010 and the United Kingdom Metropolitan Police since 2005.

The technology has been hailed as "the most significant development in audio forensics since Watergate." However, according to a paper by Huijbregtse and Geradts, the ENF technique, although powerful, has significant limitations caused by ambiguity based on fixed frequency offsets during recording, and self-similarity within the mains frequency database, particularly for recordings shorter than 10 minutes.

More recently, researchers demonstrated that indoor lights such as fluorescent lights and incandescent bulbs vary their light intensity in accordance with the voltage supplied, which in turn depends on the voltage supply frequency. As a result, the light intensity can carry the frequency fluctuation information to the visual sensor recordings in a similar way as the electromagnetic waves from the power transmission lines carry the ENF information to audio sensing mechanisms. Based on this result, researchers demonstrated that visual track from still video taken in indoor lighting environments also contain ENF traces that can be extracted by estimating the frequency at which ENF will appear in a video as low sampling frequency of video (25–30 Hz) cause significant aliasing. It was also demonstrated in the same research that the ENF signatures from the visual stream and the ENF signature from the audio stream in a given video should match. As a result, the matching between the two signals can be used to determine if the audio and visual track were recorded together or superimposed later.

Use by law enforcement 
The distinctive electrical hums have been used to provide forensic verification of audio recordings, a process fully automated in the United Kingdom.

References

External links 
The hidden background noise that can catch criminals (Tom Scott/YouTube) 

Electric power
Sound recording
Forensic techniques
Real Time Digital Simulator. Real Time Digital Simulator or RTDS as the abbreviation recommended by IEEE committee on real-time simulator applied for power systems  provides power systems simulation technology for fast, reliable, accurate, and cost-effective study of power systems with complex High Voltage Alternating Current (HVAC) and High Voltage Direct Current (HVDC) networks. The RTS is a fully digital electromagnetic transient power system simulator that operates in real time. 

HYPERSIM is one of the commercial RTS available, it has been developed by Hydro-Québec and eMEGAsim has been developed by OPAL-RT Technologies Inc. which was born within Hydro-Québec.  HYPERSIM is now available from OPAL-RT Technologies.  

RTDS is the trademark for the RTS simulator provided by RTDS Technologies.

About
The system's graphical user interface, proprietary software and mathematical algorithms can simulate any modern electric power grid configuration. As new equipment or components are added or subtracted from the simulator's configuration, the model instantly updates. For example, researchers can run simulated system-failure scenarios such as a control system cyberintrusion or a physical damage event such as a terrorist attack or natural disaster and instantly detect the order and reasoning for why dedicated relays, breakers or substations failed.

Advantages
Because the simulator functions in real time, the power system algorithms are calculated quickly enough to continuously produce output conditions that realistically represent conditions in a real network. Real-time simulation is significant for two reasons—the user can test physical devices and the user is more productive by completing many studies quickly with real-time simulation.

References

Idaho National Laboratory
United States Department of Energy
Argus (programming language). Argus is a programming language created at MIT by Barbara Liskov between 1982 and 1988, in collaboration with Maurice Herlihy, Paul Johnson, Robert Scheifler, and William Weihl.  It is an extension of the CLU language, and utilizes most of the same syntax and semantics.  Argus was designed to support the creation of distributed programs, by encapsulating related procedures within objects called guardians, and by supporting atomic operations called actions.

References

External links
 Argus Reference Manual

Procedural programming languages
Programming languages created in 1982
Programming languages created by women
Ke Wu. Ke Wu (born 9 December 1962) is a professor and researcher in electrical engineering. He currently works at the Ecole Polytechnique in Montreal, and is a Tier-I Canada Research Chair in radio-frequency (RF) and millimetre-wave engineering.

He is active in the following areas of research: microwave and millimeter wave (components, devices, receiver/transmitter); characterization and measurement of dielectric materials; fast electronics (fast logic circuits, interconnects); superconductors (circuits, applications); numerical modeling (CAD, electromagnetic fields); and optoelectronics (photonics components, broadband transmission).

Career 
Wu is the director of the Poly-Grames Research Center, founding director of the Canadian university-industry consortium, Facility for Advanced Millimetre-wave Engineering and the Center for Radiofrequency Electronics Research of Quebec. He was elected an IEEE Fellow in 2001.

In 2020, the National Post published an article stating that Wu is also a researcher at several universities in China, with at least one position being full-time; the National Post also noted that he had in 2011 been a delegate to the Chinese People's Political Consultative Conference (CPPCC), and an advisor to the Overseas Chinese Affairs Office of the Chinese Communist Party's United Front Work Department. Wu subsequently objected to suggestions that he had a parallel academic career in China, calling them "absolute nonsense", and stated that his students would often add his name to other projects exaggerating his role in order to obtain funding. He also said that his role with the CPPCC had been as an "observer".

References

External links
Poly-Grames Research Centre 

1962 births
People from Liyang
Chinese electronics engineers
Canadian electronics engineers
Fellows of the IEEE
Canadian electrical engineers
Living people
Canada Research Chairs
Fellows of the Royal Society of Canada
Fellows of the Canadian Academy of Engineering
Canadian people of Chinese descent
Engineers from Jiangsu
Educators from Changzhou
Vinyl roof membrane. A vinyl roof membrane is a polyvinyl chloride (PVC) roofing membrane used in commercial construction. Vinyl roofing membranes have been around for over 40 years in the U.S. and longer in Europe. The British Board of Agrément states that certain vinyl roof membranes "should have a life in excess of 40 years." Vinyl roofs are also the only type of commercial roofing product that has an active recycling program in place.

References

Roofs
Lisa Seeman. Lisa Seeman is an inventor and an entrepreneur and has been instrumental in creating standards for interoperability and accessibility.

She currently works for Athena ICT.

UB Access
Seeman headed a government funded incubator project that culminated into an independent company (UB Access). In 2006, UB Access was sold to Aequus Technologies Corp. and she became chief technology officer for Aequus DPS and served as managing director of UB Access' operations in Israel, that was involved in content adaptation for elearning, accessibility and localization. She then moved to EFP Consulting, creating research and development proposals and international consortiums within the FP7 framework of the European Commission. Topics included: Methodology to determine issues of complexity that effect the adoption of technology; new programming paradigms and abstractions; methodology for predicting the effect of technology on society.

Web standards
Seeman is currently the facilitator of the Cognitive and Learning Disabilities Accessibility Task Force (Cognitive A11Y TF) of the web accessibility initiative of the W3C. It aims to improve the user experience for people with learning and cognitive disabilities.

Seeman has been an invited expert for the W3C since 1999. In 2006 she became the original author and editor of the Roles for Accessible Rich Internet Applications specification and the States and Properties Module for Accessible Rich Internet Applications  which then became  the specifications for Accessible Rich Internet Applications (WAI-ARIA) for the W3C. She  is a named contributor to the Web Content Accessibility Guidelines (WCAG 2.0)  specification, although she also headed a controversial formal objection to WCAG's claim that WCAG 2.0 will address requirements for people with learning disabilities and cognitive limitations.

Seeman was also involved with ISOC IL, ACLIP, and has worked with accessibility groups of organizations such as Dublin Core and ISO.

Talks and publications
She published on topics such as dyslexia and society, the semantic web, web accessibility, and device independence. She frequently gives presentations at conferences and venues such as W3C events, standards organizations, colleges, universities and NGOs.

References

External links 
WCAG 2.0
Athena Technologies

Web accessibility
Standards of the United States
Living people
Year of birth missing (living people)
Place of birth missing (living people)