omniomni/omni-engineering huggingface dataset:
Satellite bus. A satellite bus (or spacecraft bus) is the main body and structural component of a satellite or spacecraft, in which the payload and all scientific instruments are held.

Bus-derived satellites are less customized than specially-produced satellites, but have specific equipment added to meet customer requirements, for example with specialized sensors or transponders, in order to achieve a specific mission.

They are commonly used for geosynchronous satellites, particularly communications satellites, but are most commonly used in spacecraft which occupy low Earth orbit missions.

Examples

Some satellite bus examples include:
 Boeing DS&S 702
 Lockheed Martin Space Systems A2100
 
 INVAP ARSAT-3K
 Airbus D&S Eurostar
 ISRO's I-1K, I-2K, I-3K, I-4K, I-6K, and Indian Mini Satellite bus
 NASA Ames MCSB
 SSL 1300
  family
 Orbital ATK Star Bus family, inc GEOStar
 Mitsubishi Electric DS2000
 Spacecraft bus of the James Webb Space Telescope
 SPUTNIX TabletSat
 SPUTNIX OrbiCraft-Pro

Components

A bus typically consists of the following subsystems:
 Command and data handling (C&DH) system
 Communications system and antennas
 Electrical power system (EPS)
 Propulsion
 Thermal control
 Attitude control system (ACS)
 Guidance, navigation, and control (GNC) system
 Structures and trusses
 Life support (for crewed missions).

See also
 Comparison of satellite buses
 Service module
 Satellite

References

External links
 Satellite Glossary
 JWST Observatory: The Spacecraft Bus
 Spitzer's Spacecraft Bus
 Gunter's Space Page: Spacecraft buses

 

es:Satélite artificial#Modelo de satélite
Nord 1601. The Nord 1601 was a French aerodynamic research aircraft designed and built by Nord Aviation. The aircraft was designed to investigate the aerodynamics of swept wings and related high-lift devices.

Design and development
The 1601 was a cantilever mid-wing monoplane with a 33° swept wing. The wing was fitted with ailerons, spoilers, leading edge 
slats and trailing edge flaps. It had  retractable tricycle landing gear and was powered by two Rolls-Royce Derwent V turbojets in underslung, wing mounted nacelles on either side of the fuselage. It had an enclosed cockpit and was fitted with a Martin-Baker ejection seat. The 1601, registered F-WFKK, first flew on the 24 January 1950.

Variants
Nord 1600
Proposed fighter variant, not built.
Nord 1601
Aerodynamic research aircraft, one built.

Specifications (1601)

References

Bibliography

1950s French experimental aircraft
1601
Twinjets
Mid-wing aircraft
Aircraft first flown in 1950
Paul Weiss. Paul Weiss may refer to:

Paul Weiss (mathematician) (1911–1991), German and British mathematician and theoretical physicist
Paul Weiss (nanoscientist) (born 1959), American nanoscientist
Paul Weiss (philosopher) (1901–2002), American philosopher
Paul Alfred Weiss (1898–1989), Austrian biologist

See also
Paul Weis (1907–1991), Austrian lawyer and survivor of Nazi persecution
Paul, Weiss, Rifkind, Wharton & Garrison, U.S. law firm

Weiss, Paul
List of bridges on the National Register of Historic Places in Colorado. This is a list of bridges and tunnels on the National Register of Historic Places in the U.S. state of Colorado.

Studies of Colorado's historic bridges, to assess which ones could qualify for National Register listing, were conducted in 1983, 1987, 2000, and 2011.  The latter study evaluated "712 bridges and grade separations" which had been built during 1959 to 1968.

Structures

See also

List of bridges documented by the Historic American Engineering Record in Colorado
List of tunnels documented by the Historic American Engineering Record in Colorado
Bibliography of Colorado
Geography of Colorado
History of Colorado
Index of Colorado-related articles
List of Colorado-related lists
Outline of Colorado

References

External links

 
Colorado, List of Bridges on the National Register of Historic Places in
Colorado transportation-related lists
Lists of buildings and structures in Colorado
Bridges
Akimotoite. Akimotoite is a rare silicate mineral in the ilmenite group of minerals, with the chemical formula . It is polymorphous with pyroxene and with bridgmanite, a natural silicate perovskite that is the most abundant mineral in Earth's silicate mantle. Akimotoite has a vitreous luster, is colorless, and has a white or colorless streak. It crystallizes in the trigonal crystal system in space group R. It is the silicon analogue of geikielite (MgTiO3).

Crystal structure

The crystal structure is similar to that of ilmenite (FeTiO3) with Si and Mg in regular octahedral coordination with oxygen. The Si and Mg octahedra align in discrete layers alternating up the c-axis. The space group is R (trigonal) with a = 4.7284 Å; c = 13.5591 Å; V = 262.94 Å3; Z = 6.

Occurrence
Akimotoite was found in the Tenham meteorites in Queensland, Australia.  It is believed to have 
formed as the result of an extraterrestrial shock event. It is the silicon analogue of geikielite (MgTiO3). It was named after physicist Syun-iti Akimoto (also known as ) (1925–2004), University of Tokyo.

It has also been reported from the Sixiangkou meteorite in the Gaogang District, Jiangsu Province, Taizhou Prefecture, China; the Zagami Martian meteorite, Katsina State, Nigeria and from the Umbarger meteorite, Randall County, Texas.

Akimotoite is believed to be a significant mineral in the Earth's mantle at depths of  in cooler regions of the mantle such as where a subducted slab enters into the lower mantle. Akimotoite is elastically anisotropic and has been suggested as a cause of seismic anisotropy in the lower transition zone and uppermost lower mantle.

See also
 Glossary of meteoritics

References

Oxide minerals
Meteorite minerals
Trigonal minerals
Minerals in space group 148
Binary liquid. Binary liquid is a type of chemical combination, which creates a special reaction or feature as a result of mixing two liquid chemicals, that are normally inert or have no function by themselves. A number of chemical products are produced as a result of mixing two chemicals as a binary liquid, such as plastic foams and some explosives.

See also
Binary chemical weapon
Thermophoresis
Percus–Yevick equation

References

External links
Phase separation of a binary liquid mixture in porous media studied by nuclear magnetic resonance cryoporometry
Surface adsorption and orientation near the critical point of binary liquid mixtures
Binary liquid mixtures in porous solids

Chemical substances
Chemical weapons
Roller mower. A roller mower, or rollermower, is a tractor-powered multi-spindled rotary mowers that have full width rollers front and rear. Most rollermowers attach to a four-wheeled tractor via the three-point linkage and are powered by the tractor's power take-off (PTO), though larger models connect three or more complete mowing decks to a separate chassis that is towed behind the tractor. Good rollermowers can produce a finish rivalling that of reel (cylinder) mowers while generally being far more robust and requiring considerably less maintenance. Modern machines can also cope efficiently with a wider range of grass lengths and densities than cylinder mowers.

History

The original developer of the rollermower is uncertain, but Howard Rotavator Pty Ltd manufactured and sold the 72RLM (later the HS20RLM/180) Rollamowa in Australia from the early 1970s. These were linkage-mounted three-spindled rotary mowers with a cutting width of 1.8m (72”). A larger version (HS20RLM/300) was also produced before manufacturing ceased in about 1984. The company was absorbed by Howard Australia Pty Ltd and from 1985 sourced its rollermowers from Trimax Industries Ltd (later Trimax Mowing Systems) in New Zealand. Trimax then sold the same machines under the Trimax brand around the world.

As of 2012, several other companies throughout the world manufacture a variety of rollermowers. These included Major Equipment in the United Kingdom, which manufactures roller mowers for sports pitches, golf courses, racecourses, and lawns.

References

Agricultural machinery
Hensel Phelps Construction. Hensel Phelps Construction Co. is one of the largest general contractors and construction managers in the United States, ranked consistently among ENR's (Engineering News-Record) top 20 Contractors by revenue. 
Founded in 1937 as a small, local builder in Greeley, Colorado, Hensel Phelps has become a multibillion-dollar, employee owned national contractor with an eclectic portfolio of completed projects. Hensel Phelps currently has 11 district offices across the country, as well as additional regional offices.

In August 2021, Hensel Phelps announced its acquisition of Colorado-based Hydro Construction, which specializes in construction of water and wastewater treatment facilities.

See also
 Top 100 US Federal Contractors

References

Employee-owned companies of the United States
Companies based in Greeley, Colorado
Construction and civil engineering companies established in 1937
Privately held companies based in Colorado
American companies established in 1937
Technology companies established in 1937
1937 establishments in Colorado
Construction and civil engineering companies of the United States
Vyomesh Joshi. Lauzi, lausi"VJ" Joshi (born c. 1956) was 3D Systems CEO and president, and was the executive vice president of Hewlett-Packard Company's Imaging and Printing Group. He also served as the executive sponsor for all HP operations and initiatives in India and was a member of HP's executive council.

Early life 
Joshi did his bachelor's degree from L. D. College of Engineering, Ahmedabad, India. He holds a master's degree in electrical engineering from Ohio State University.

Career 
Joshi joined HP in 1980 as a research and development engineer, he would walk from his apartment to his office. He became vice president in January 2001, became president of the Imaging and Printing Group in February 2001.

After Ann Livermore stepped down as HP's enterprise chief in 2011, Joshi was the last remaining top HP executive to have direct ties to Hewlett-Packard's name-sake founders. Joshi has been described as "a superstar executive."

Joshi also served as chairman of Phogenix Imaging LLC from 2000 until May 2003. Joshi has been a member of the Yahoo! board of directors since 2005. However, he retired from Yahoo's board in February 2012, after serving for 7 years.

In 2005, Fortune magazine published a diversity list, "a list of the most influential African-American, Latino, and Asian-Americans in business, sports, politics, academia, and the arts." Joshi was one of three Indian Americans named.

Joshi's annual compensation in 2010 was $9.1 million, and he owned over $26.5 million of stock options.

On March 21, 2012, it was announced that HP will lump printers and PCs division together and that Joshi would retire, ending a 32-year career with HP. Some sources suggested he was "forced out" by CEO Meg Whitman.

On April 4, 2016, VJ was appointed as CEO and president of 3D Systems, taking lead after Avi Reichental departure by the end of 2015. On May 14, 2020, the 3D Systems board named Jeff Graves as president and CEO, effective May 26.

References 

1950s births
Living people
Lalbhai Dalpatbhai College of Engineering alumni
IIT Kanpur alumni
American computer businesspeople
Hewlett-Packard people
American people of Indian descent
Ohio State University College of Engineering alumni
American Hindus
Directors of Yahoo!
American corporate directors
American people of Gujarati descent
20th-century American businesspeople
Year of birth missing (living people)
F-class escort ship. The F-class escort ships were a multi-purpose class of 10 fleet escorts () built for the German Navy (Kriegsmarine) in the 1930s. During the Second World War, their unsatisfactory reliability and poor seakeeping abilities had them soon relegated to second-line duties in the Baltic Sea. Four ships were sunk during the war and the survivors were scrapped afterwards.

Construction
The ships were built by Germaniawerft (F 1 – F 6), Kiel, Blohm & Voss (F 7, F 8) and Wilhelmshaven dockyard (F 9, F 10). They entered service between 1936 and 1939. Similar in size to the Type 35 and Type 37 torpedo-boats, the ships were originally conceived as fast fleet or convoy escort ships that could also perform anti-submarine and minesweeping work. They were also used as a test bed class for a new high-pressure steam power plant intended for use in destroyers.

As a class, they were overloaded and over-engined, which contributed to severe hull stress and very poor sea-keeping characteristics; these flaws were partially remedied by extensive rebuilds between 1938 and 1940. The power plants likewise proved to be prone to frequent breakdowns, and most of the ships were removed from operational service during the later years of the war after machinery failures meant the ships spent more time in repair than in use.

Use and administration
With the exception of fleet service and convoy duties between 1939 and 1941, they spent most of the war in use as tenders or U-boat training ships.  Between 1943 and 1945, the escort ships were grouped into five escort flotillas augmented by converted civilian craft as well as torpedo boats of the Torpedoboot Ausland program.

Ships

One ship, F 9, was sunk in December 1939 after being torpedoed by . F 5 was damaged by a mine in the Baltic Sea and sank under tow 29 January 1945. F 3 was sunk by British aircraft 3 May 1945 and F 6 was sunk by US aircraft 30 March 1945. One was claimed to be the craft sunk in Tobruk Harbour by Native Military Corps Lance Corporal Job Maseko on July 21 1942, as a POW consigned to work as stevedore by the occupying Axis forces, for which he was eventually awarded the Military Medal, however none of this class were in the Mediterranean. The others survived the war and were scrapped or sunk as target ships.

References

Bibliography

External links

 page from german-navy.de

World War II naval ships of Germany
Ships of the Kriegsmarine
Firefly (supercomputer). The Firefly computer is a high-performance computer cluster housed at the Holland Computing Center located inside of the Peter Kiewit Institute at the University of Nebraska Omaha.

Specifications
The system runs on 1,151 compute nodes, 871 have quad-core AMD Opteron processors and 280 have dual quad-core processors. All have eight gigabytes of memory. Each node is connected to a high-speed, low-latency InfiniBand fabric.

The supercomputer ranked 43 of 500 in the Top 500 Supercomputing Sites list in November 2007 but has since dropped out of the top 500 since the Center's rating was not updated after upgrades.

References

X86 supercomputers
Computers
Defense Travel System. The Defense Travel System (DTS) is a software application used by the  U.S. Department of Defense which allows defense travelers to manage their commercial travel in accordance with the government's Joint Travel Regulations.

Travelers can create authorizations — temporary duty travel (TDY) travel orders, prepare travel reservations, receive approvals, generate travel vouchers, and receive a split reimbursement between their bank accounts and the Government Travel Charge Card (GTCC) vendor.

DTS operates at over 9,500 total sites worldwide, and on average, DTS processes more than 25,000 transactions while approximately 100,000 unique users access it on a daily basis. Defense Manpower Data Center (DMDC) Program Management Office DTS (PMO-DTS) has the program oversight (acquisition, technical, operation and maintenance) oversight of DTS while the Defense Travel Management Office (DTMO) has functional oversight.

Customer support
Travel Assistance Center (TAC) provides travel assistance to the Defense travel community before, during, and after official travel. The staff provide advice and assistance on the DTS, DoD travel card, travel policy, commercial travel services and programs, and allowances and entitlements.
TraX allows users to submit a help desk ticket and track the progress of open tickets.

Training resources
The Defense Travel Management Office (DTMO) provides training resources for using DTS:

 Web-based training
 Distance learning
 Courseware
 Enterprise Web-based Training System (EWTS) 
 Reference materials

References

External links
 DTS website
 Defense Travel Management Office (DTMO)
 TraX

Military logistics
American travel websites
R. Stanley Williams. Richard Stanley Williams (born 1951) is a research scientist in the field of nanotechnology and a Senior Fellow and the founding director of the Quantum Science Research Laboratory at Hewlett-Packard. He has over 57 patents, with 40 more patents pending. At HP, he led a group that developed a working solid state version of Leon Chua's memristor.

Williams earned a bachelor's degree in chemical physics in 1974 from Rice University and a Ph.D. in physical chemistry from the University of California, Berkeley in 1978. After graduating, he worked at Bell Labs before joining the faculty at UCLA, where he served as a professor from 1980 to 1995. He then joined HP Labs as director of its Information and Quantum Systems Lab.

Awards and honors
 Foresight Institute Feynman Prize in Nanotechnology (2000)
 Herman Bloch Medal for Industrial Research (2004)
 Julius Springer Prize for Applied Physics (2000)
 Glenn T. Seaborg Medal, UCLA (2007)

References

External links
His Nov. 28, 2008, article on Memristors in IEEE Spectrum

Living people
Rice University alumni
Scientists at Bell Labs
UC Berkeley College of Chemistry alumni
21st-century American physicists
Hewlett-Packard people
University of California, Los Angeles faculty
1951 births
Alban C. Stimers. Alban Crocker Stimers (June 5, 1827 – June 3, 1876) was a chief engineer with the United States Navy. He assisted with the design of the Navy's first ironclad, the , and later with the design of the Passaic-class monitors. His later career was marred by the scandal which enveloped the Casco-class monitors after they were found to be unseaworthy.

Career
Stimers was born in New York in 1827. He entered the Navy as a Third Assistant Engineer in January 1849 and became a Chief Engineer in July 1858. He served in the steam frigate Roanoke during the early months of the Civil War and later in 1861 was assigned to work with John Ericsson on the construction of the ironclad turret ship Monitor. Though not formally a member of Monitors complement, Stimers took part in her difficult voyage from New York to Hampton Roads, Virginia, and served on board during her historic battle with the Confederate ironclad  on 9 March 1862. Much of the success of these two operations was due to his inspired work, and Chief Engineer Stimers continued an intimate association with the Navy's ironclad shipbuilding program for much of the rest of the Civil War.

In 1862–63, Stimers again worked with Ericsson during the building of the next class of monitor-type ironclads, the Passaic class. He accompanied these ships during early operations against the Confederacy, most notably the 7 April 1863 bombardment of Fort Sumter, in Charleston Harbor, South Carolina, and helped repair them after that action.

Later in the year he was placed in charge of an ambitious project to construct twenty light-draft monitors for use in shallow inland waters. Unfortunately, the displacement calculations made for these ships were badly done. The resulting Casco class turned out to be useless for their intended role and had to be extensively modified. Stimers had inadvertently demonstrated the inherent difficulty of successfully shepherding complex technological endeavors, something that has bedeviled "project managers" from his time to ours.

After the Casco class debacle, Stimers returned to the seagoing Navy. At the beginning of 1865, he was Chief Engineer of the steam frigate Wabash. He resigned from the Navy in August 1865, and became a consultant. He died of smallpox on June 3, 1876, survived by his wife and five children.

Published works
 (Google eBook)

See also

References

Further reading
 Wegner, Dana M., Alban C. Stimers and the Office of the General Inspector of Ironclads, 1862–1864, Master's thesis, State University of New York College at Oneonta, 1979.
 Roberts, William H., Civil War Ironclads: The U.S. Navy and Industrial Mobilization (Baltimore: Johns Hopkins University Press, 2002).

1827 births
1876 deaths
Union Navy officers
United States Navy officers
People of New York (state) in the American Civil War
Sanyo MBC-550 series. The MBC-550 series, also known as the MBC-550/555, is a series of personal computers sold by Sanyo. It was unveiled at the COMDEX/Spring '83 in April 1983 and first released to market in March 1984. All models in the MBC-550 series featured pizza-box-style cases and Intel 8088 microprocessors and run versions of MS-DOS. On its release in 1984, the MBC-550 was the least expensive IBM PC compatible released to date, at a price of . The MBC-550 series followed Sanyo's MBC-1000 line of CP/M computers.

Specifications
The MBC-550 has much better video display possibilities than the CGA card (based on the HD46505 CRTC, providing a 3-bit RGB palette of 8 colors at  resolution, vs CGA's 4 colors at  or 2 colors at ). Other resolutions, like  and  were possible. This display was not completely compatible with the IBM PC. 

The computer lacks a standard BIOS, having only a minimal bootloader in ROM that accesses hardware directly to load a RAM-based BIOS. The diskette format (FM rather than MFM) used is not completely compatible with the IBM PC, but special software on an original PC or PC/XT (but not PC/AT) can read and write the diskettes, and software expecting a standard 18.2 Hz clock interrupt has to be rewritten.

The MBC-550 was also the computer for NRI training. Starting by building the computer, the NRI promised you would be "qualified to service and repair virtually every major brand of computer". NRI was advertised in Popular Mechanics and Popular Science throughout 1985.

The MBC-550 is less PC compatible than the IBM PCjr. Its inability to use much PC software was a significant disadvantage;  InfoWorld reported in August 1985 that Sanyo "has initiated a campaign to sell off" MBC-550 inventory. The company's newer computers were, an executive claimed, 99% PC compatible.

Early MBC-500 machines used true Intel 8088 microprocessors. In late March 1984, Sanyo reached an agreement with Intel to manufacture the 8088 in Japan as a second source, prompted by a widespread chip shortage at the time. As part of the agreement with Intel, Sanyo was not to sell their 8088 chips except as part of their Sanyo MBC-550 series computers.

Dedicated magazine 
Soft Sector was a magazine for people who owned Sanyo MBC-550 and 555 DOS computers. (But much of the content equally applied to most IBM clones at the time.) A typical issue includes news, reviews, how-to's, technical advice and education, tips and tricks, as well as BASIC language programs that one could type in and adapt to suit one's needs.

Models
MBC-550 – One 5.25-inch disk drive (160 KB)
MBC-555 – Two 5.25-inch disk drives (160 KB)
MBC-550-2 – One 5.25-inch disk drive (360 KB)
MBC-555-2 – Two 5.25-inch disk drives (360 KB)
MBC-555-3 – Two 5.25-inch disk drives (1.2 MB)

References

IBM PC compatibles
Computer-related introductions in 1984
Sanyo computer products