omniomni/omni-engineering huggingface dataset:
Delta E. The Delta E, or Thor-Delta E was an American expendable launch system used for twenty-three orbital launches between 1965 and 1971. It was a member of the Delta family of rockets.

The first stage was a Thor missile in the DSV-2C configuration, and the second stage was the Delta-E, which was derived from the earlier Delta-A. Three Castor-1 solid rocket boosters were clustered around the first stage. Two different solid-fuel upper stages were available; an Altair-2 was used on the baseline version, however this could be replaced with an FW-4D to increase performance. A Delta E with the FW-4D upper stage was designated Delta E1. Six flights used the Delta E configuration and seventeen used the Delta E1.

Delta E rockets were launched from Cape Canaveral Air Force Station Launch Complex 17 and Vandenberg Air Force Base Space Launch Complex 2E. All 23 flights were successful. On December 16 1965, a Delta E launched the Pioneer 6 space probe.

References

Delta (rocket family)
Delphin (disambiguation). Delphin was a German midget submarine created during World War II.

Delphin may also refer to:

 Delphin, a Latin word and root meaning "dolphin" (also delphinus)
 Delphin, Greek sea god, the leader of the dolphins, Poseidon placed him in the sky as the constellation Delphinus
 Delphin (molecule), an anthocyanin (Delphinidin-3,5-O-diglucoside)
 Delphin Classics, a large edition of the Latin classics
 Dornier Delphin, a 1920s German single-engined commercial flying boat
 DELPH-IN, a collaboration where computational linguists worldwide developing natural language processing tools for deep linguistic processing of human language
 MV Delphin, a cruise ship owned by the India-based Vishal Cruises Pvt. Ltd.
, a West German fishing vessel in service 1952-58
 Operation Delphin, an anti-partisan operation in Croatia during World War II

People
 Delphin Enjolras (1857–1945), French academic painter
 Delphin Kyubwa, Congolese politician
 Delphin Strungk (1600/1601–1694), German composer and organist
 Delphin Tshiembe (born 1991), Congolese footballer
 Otto Delphin Amundsen (1896–1957), Norwegian genealogist
 Miriam Delphin-Rittmon, American psychologist

See also
 Delfin (disambiguation)
 Delphine (disambiguation)
 Delphinine, an alkaloid
 Jean-Delphin
Naval Facilities Engineering Service Center. The Naval Facilities Engineering Service Center (NFESC), formerly Naval Civil Engineering Laboratory (NCEL), located in Port Hueneme, California, is a center within the United States Navy that provides engineering services, technology testing, specialized facilities, and expertise in these facilities. The organization is centered on a primary customer: the United States federal government, specifically branches of the Department of Defense, the Navy, and the Marine Corps, although it does conduct business with a variety of other government and private organizations.

Origin
NFESC was established October 1, 1993 from the remains of several other similar organizations, one of which was NCEL. The NFESC workforce included former NCEL employees represented by National Association of Government Employees, and unrepresented employees of other Navy entities.

See also
 Naval Facilities Engineering Systems Command
 Facilities engineering

References 

Organizations based in Ventura County, California
United States military associations
1993 establishments in California
Jorge Sabato. Jorge Alberto Sábato (June 4, 1924 – November 16, 1983) was an Argentine physicist and technologist.

In 1955 he created the Metallurgy department at CNEA, and was its director up to 1968 when he became Technology manager of the CNEA. While with the CNEA he promulgated the Sábato triangle model, dealing with interrelationships between science, government and industry in promoting scientific and technological development.

In 1976 he was one of the creators of INVAP SE, he was the spiritual godfather, introducing the concept of "Technology Company".

In 1993 the Instituto Sábato was created as a result of all his effort towards the development of materials science in Argentina.

See also
CNEA

References
 Prof. Jorge A. Sábato Biography

Argentine physicists
1924 births
1983 deaths
John Klensin. John C. Klensin is a political scientist and computer science professional who is active in Internet-related issues.

Career
His career includes 30 years as a principal research scientist at MIT, including a period as INFOODS Project Coordinator for the United Nations University, distinguished engineering fellow at MCI WorldCom, and Internet architecture vice president at AT&T; he is now an independent consultant.

The Cambridge Project
Klensin was involved in The Cambridge Project, a social science data management cooperation project taking place at MIT, Harvard and other universities from 1969 to 1977. As a part of this program, John Klensin led the development of the Consistent System targeted for use by Social Scientists.  The Consistent System ran on top of  the Multics operating system.

Internet
His involvement with Internet protocols began in 1969, when he worked on the File Transfer Protocol.

In 1992, Randy Bush and John Klensin created the Network Startup Resource Center, helping dozens of countries to establish connections with FidoNet, UseNet, and when possible Internet.

IETF
Klensin is the author or co-editor of 60 RFCs, and has served as IETF Applications Area director 1993-1995, Internet Architecture Board member 1996-2002, and its chair 2000-2002.  He again served on the Board from 2009 to 2011.

The RFCs written or edited by Klensin include SMTP (including RFC 4409 and RFC 5321), IDNA (including RFC 5890 and RFC 6055), Unicode (including RFC 5137 and RFC 5198), and other fields including CRAM-MD5 (RFC 2195) and IETF policies (RFC 3933). In March 2011 8BITMIME (RFC 6152) was published as Internet standard STD 71. In November 2011 Mail submission (RFC 6409) was published as STD 72.

His i18n work also included an April Fools' Day RFC in collaboration with Harald Alvestrand (RFC 5242) and MIME in collaboration with Ned Freed (RFC 4289 among others).  , he is a member of the RFC Independent Submissions Editorial Board. He is working on several Internet drafts.

Awards and honours
2003 - INCITS Merit Award.
2007 - inducted as a Fellow of the Association for Computing Machinery.
2012 - inducted into the Internet Hall of Fame by the Internet Society.

See also

References 

Living people
Year of birth missing (living people)
American computer scientists
Internet Society people
Internet pioneers
2007 fellows of the Association for Computing Machinery
Massachusetts Institute of Technology faculty
Massachusetts Institute of Technology alumni
Indra Ganesan College of Engineering. The Indra Ganesan College of Engineering (IGCE) is an engineering and research institute in Trichy, Tamil Nadu that is part of Anna University.

The college has undergraduate, postgraduate and doctoral programs.

Branches for research
Computer Science and Engineering
Electrical and Electronics Engineering
Information Technology
Electronics and Communication Engineering
Mechanical Engineering
Civil Engineering
ME-VLSI
ME-CSE
MBA

The college is also having an in-house management training institute and Institute of Higher Studies.

See also
List of colleges in Trichy

External links

Engineering colleges in Tamil Nadu
Colleges affiliated to Anna University
Universities and colleges in Tiruchirappalli
IREDES. IREDES, International Rock Excavation Data Exchange Standard, is an industry standard to unify routines for the data exchange between mining equipment and office computer systems. It defines one "common electronic language" to be talked by the automation systems throughout the mine. In year 2000, IREDES was founded by the major players in the mining industry. Since then, the standard was developed, built and tested.

Background
Modern mining machines today are controlled electronically via network. This kind of equipment provides enormous amounts of electronic reports and data. Before IREDES, there was no way of cost effectively exchanging the process information with databases, simulation tools and other enterprise level software. Any data exchange problem had to be solved by individual and expensive software development projects. To solve this problem, IREDES was founded to unify the data exchange format and method such that individual development effort can be minimized.

Organization
IREDES is a not-for-profit organization located in Ladbergen, Germany. It is jointly financed by the member companies on a cost sharing basis.
The standard documents are open to the public. They are accessible free of charge for members. Non-members can purchase the documents from the IREDES office for a small amount of contribution to the standardization work.

Data Profiles
All the data profiles are based on Extensible Markup Language (XML). This is due to the high extendability and interoperability of the language. The current data profiles created with the contribution of board members are Drilling rig and LHD trucks. More profiles will be added in the future if needed.

References

External links
IREDES initiative

Mining equipment
RjB 9 and 10. RjB 9 and RjB 10 were two identical electric locomotives operated by Norsk Transport on Rjukanbanen in Norway. Built by Swiss Sécheron and German Jung in 1958, they served until the closing of the line in 1991.

The locomotives were equipped with four 183 kW motors, giving 732 kW in total. They could operate at 55 km/h, and were built for both 10 kV and 15 kV electrical systems; the former was used on Rjukanbanen until the older RjB 1–8 were retired in 1966, and the power changed to the standard of Norges Statsbaner.

A b/w photograph of unit # 9 heading a freight working en route appeared in "Locomotives made in Germany", 1966 ed., pg.15 bottom; issued by "Exportfoerderungsverband der deutschen Lokomotivindustrie", DE-Frankfurt/Main 1966, softcover, quadrilingual. Rating given at 830 kW by the caption; factor 1,13 reflects the ratio between a 1-hourly rating and a continuous rating (as likely given in the text here) for series-wound, directly-fed, single-phase ac electric motors. Unfortunately, no further detail was issued. Mechanical design reflects that of the shorter, yet heavier dual-power Bo'Bo' 600 V DC o/h-fed electric / diesel-electric locomotives supplied by Jung to the "E&H" docklands and smelting works railways of Duisburg-Hamborn at the same time.

References

Norsk Transport locomotives
Electric locomotives of Norway
Railway locomotives introduced in 1958
1958 establishments in Norway
Standard gauge locomotives of Norway
Mercury(I) fluoride. Mercury(I) fluoride or mercurous fluoride is the chemical compound composed of mercury and fluorine with the formula Hg2F2. It consists of small yellow cubic crystals, which turn black when exposed to light.

Synthesis
Mercury(I) fluoride is prepared by the reaction of mercury(I) carbonate with hydrofluoric acid:
Hg2CO3 + 2 HF → Hg2F2 + CO2 + H2O

Reactions
When added to water, mercury(I) fluoride hydrolyzes to elemental liquid mercury, mercury(II) oxide, and hydrofluoric acid:
Hg2F2 + H2O → Hg + HgO + 2 HF

It can be used in the Swarts reaction to convert alkyl halides into alkyl fluorides:
2 R-X + Hg2F2 → 2 R-F + Hg2X2
where X = Cl, Br, I

Structure

In common with other Hg(I) (mercurous) compounds which contain linear X-Hg-Hg-X units, Hg2F2 contains linear FHg2F units with an Hg-Hg bond length of 251 pm (Hg-Hg in the metal is 300 pm) and an Hg-F bond length of 214 pm.  The overall coordination of each Hg atom is a distorted octahedron; in addition to the bonded F and other Hg of the molecule, there are four other F atoms at 272 pm. The compound is often formulated as .

References

Mercury(I) compounds
Fluorides
Metal halides
Chemical compounds containing metal–metal bonds
Lockheed Martin Advanced Technology Laboratories. Lockheed Martin Advanced Technology Laboratories (ATL) is a department of Lockheed Martin headquartered in Cherry Hill, New Jersey, that specializes in applied research and development. Additional facilities are located in Eagan, Minnesota, Kennesaw, Georgia, and Arlington, Virginia, employing approximately 250 people in total.

, the department is pursuing research in human systems optimization, electronic warfare, robotic autonomy, and data analytics. ATL's primary research partners include DARPA, U.S. government laboratories, universities, and Lockheed Martin's Skunk Works and Advanced Technology Center.

On June 21, 2024, the department was sanctioned by the Chinese government due to arm sales to Taiwan.

References

External links 
Advanced Technology Laboratories at Lockheed Martin

Lockheed Martin
Cherry Hill, New Jersey
American entities subject to Chinese sanctions
Kompienga Dam. The Kompienga Dam is a large hydro-electric dam in Kompienga Province in southeastern Burkina Faso. Constructed between 1985 and 1988, it is the country's first hydro-electric dam and is responsible for much of Ouagadougou's electricity supply. Visitors can obtain a permit to visit the control room of the dam from the state electricity parastatal.

References

Dams in Burkina Faso
Kompienga Province
Dams completed in 1988
WarpSpeed. WarpSpeed is a space flight simulator video game created by Accolade for the Sega Genesis/Mega Drive and Super NES.

Gameplay 
The premise of WarpSpeed is to rid the current scenario of enemy fighters. Scenarios make use of quadrants in which the player flies sector by sector or uses faster-than-light travel to warp from sector to sector. Most space flight consists of navigating asteroid fields, although some sectors contain mines that must be destroyed. During the course of gameplay, the player receives transmissions regarding various topics, consisting of clearing out minefields to travelling to a specific sector to obtain some manner of space technology before the enemy reaches it. Other transmissions are distress signals from space stations asking for assistance from approaching enemy fighters.

Features
WarpSpeed features pseudo 3D gameplay, allowing the player to supposedly travel in 360 degrees in flight; however, the quadrant is laid out in a 2-D configuration so that the player only really travels along an X-axis and a Y-axis. Wormholes are also located in various quadrants and allow transport to other quadrants; however, they slowly deplete the vessel's warp drive reserves.

The game allows four different space craft for the player to use, each with progressively stronger weapons. The players accumulated game score eventually allows the player to automatically upgrade to the next available craft. The game also features an award system based on the number of points that players have gained from destroying enemy fighters to achieving other goals.

The game also features a damage system that affects the performance of the player's craft. For instance, if the damage control screen indicates the players' engines have been damaged, their maximum speed will decrease; if their weapons system has taken damage, the players' weapons will not always fire correctly, etc.

Throughout the quadrant, there may be one or multiple space stations for the player to dock with, refuel and replenish their ship's systems, ammunition, and warp drive reserves. These stations are critical to the player and if they are lost, they can not be replaced.

If the players craft suffers too much damage, the vessel will be destroyed. The player has three lives to complete the chosen scenario. If the player loses all three lives, the game is over.

References

External links
 WarpSpeed at MobyGames

1992 video games
Accolade, Inc. games
Science fiction video games
Sega Genesis games
Single-player video games
Space combat simulators
Super Nintendo Entertainment System games
Video games developed in the United States
Sodium chromate. Sodium chromate is the inorganic compound with the formula Na2CrO4. It exists as a  yellow hygroscopic solid, which can form tetra-, hexa-, and decahydrates. It is an intermediate in the extraction of chromium from its ores.

Production and reactivity
It is obtained on a vast scale by roasting chromium ores in air in the presence of sodium carbonate:
2Cr2O3  +  4 Na2CO3  +  3 O2    →   4 Na2CrO4  +  4 CO2
This process converts the chromium into a water-extractable form, leaving behind iron oxides. Typically calcium carbonate is included in the mixture to improve oxygen access and to keep silicon and aluminium impurities in an insoluble form. The process temperature is typically around 1100 °C. For lab and small scale preparations a mixture of chromite ore, sodium hydroxide and sodium nitrate reacting at lower temperatures may be used (even 350 C in the corresponding potassium chromate system). Subsequent to its formation, the chromate salt is converted to sodium dichromate, the precursor to most chromium compounds and materials.  The industrial route to chromium(III) oxide involves reduction of sodium chromate with sulfur.

Acid-base behavior
It converts to sodium dichromate when treated with acids:
 2 Na2CrO4 + 2HCl → Na2Cr2O7 + 2NaCl + H2O

Further acidification affords chromium trioxide:
Na2CrO4  +  H2SO4   →   CrO3  +  Na2SO4  +  H2O

Uses
Aside from its central role in the production of chromium from its ores, sodium chromate is used as a corrosion inhibitor in the petroleum industry. It is also a dyeing auxiliary in the textile industry. It is a diagnostic pharmaceutical in determining red blood cell volume.

In organic chemistry, sodium chromate is used as an oxidant, converting primary alcohols to carboxylic acids and secondary alcohols to ketones. Sodium chromate is a strong oxidizer.

Safety
As with other Cr(VI) compounds, sodium chromate is carcinogenic. The compound is also corrosive and exposure may produce severe eye damage or blindness. Human exposure further encompasses impaired fertility, heritable genetic damage and harm to unborn children.

See also
 Chromate and dichromate

References

Further reading

Chromates
Sodium compounds
Oxidizing agents
Faxén's law. In fluid dynamics, Faxén's laws relate a sphere's velocity  and angular velocity  to the forces, torque, stresslet and flow it experiences under low Reynolds number (creeping flow) conditions.

First law
Faxen's first law was introduced in 1922 by Swedish physicist Hilding Faxén, who at the time was active at Uppsala University, and is given by

where
  is the force exerted by the fluid on the sphere
  is the Newtonian viscosity of the solvent in which the sphere is placed
  is the sphere's radius
  is the (translational) velocity of the sphere
  is the disturbance velocity caused by the other spheres in suspension (not by the background impressed flow), evaluated at the sphere centre
  is the background impressed flow, evaluated at the sphere centre (set to zero in some references).

It can also be written in the form

where  is the hydrodynamic mobility.

In the case that the pressure gradient is small compared with the length scale of the sphere's diameter, and when there is no external force, the last two terms of this form may be neglected.  In this case the external fluid flow simply advects the sphere.

Second law
Faxen's second law is given by

where
 is the torque exerted by the fluid on the sphere
 is the angular velocity of the sphere
 is the angular velocity of the background flow, evaluated at the sphere centre (set to zero in some references).

'Third law'
Batchelor and Green derived an equation for the stresslet, given by

where
 is the stresslet (symmetric part of the first moment of force) exerted by the fluid on the sphere,
 is the velocity gradient tensor;  represents transpose; and so  is the rate of strain, or deformation, tensor.
 is the rate of strain of the background flow, evaluated at the sphere centre (set to zero in some references).

Note there is no rate of strain on the sphere (no ) since the spheres are assumed to be rigid.

Faxén's law is a correction to Stokes' law for the friction on spherical objects in a viscous fluid, valid where the object moves close to a wall of the container.

See also 
 Immersed boundary method

Notes

References 

Equations of fluid dynamics
White Sands V-2 Launching Site. The White Sands V-2 Launching Site, also known as Launch Complex 33 and originally as Army Launch Area Number 1, is an historic rocket launch complex at White Sands Missile Range in southern New Mexico.  It was here that the United States first performed test launches of German V-2 rockets captured toward the end of World War II.  These tests were the first step in both military advances in rocketry, and in the development of the United States space exploration programs.  The site was designated a National Historic Landmark in 1985.

History
The Nazi German V-2 rocket was one of the most advanced weapons produced in World War II, and hundreds of them were launched at Allied targets in the last two years of the war.  In the aftermath of the war, the United States launched Operation Paperclip, a secret program that successfully recruited German scientists and engineers (most prominently Wernher von Braun) to work for the American military, and transported 100 captured V-2 rockets to the recently established White Sands Missile Range.  Between 1946 and 1951, the Army fired 67 V-2 sounding rockets from this site.  These launches, and the training of a class of scientists and engineers, led directly to the further development of new rocket launch programs, including ultimately the launch of humans into space.

Site description
Launch Complex 33 is located near the far southern end of the White Sands Missile Range, east of Las Cruces, New Mexico.  On the range grounds, it is located on  east of the White Sands Range Museum.  There are two principal surviving elements of the launch complex.  One is the steel gantry, a steel structure  in height and  wide, from which the V-2s and later classes of rockets were launched.  It has four platforms at different heights, which can be swung into position to accommodate rockets of different sizes, and a network of block-and-tackle systems to assist in rocket placement.  The other structure is a concrete observation tower with walls  thick, and a pyramidal roof cap that consists of  of solid concrete.  It has observation portals with specialized glass windows allowing for close observation of the launches.

See also

National Register of Historic Places listings in Doña Ana County, New Mexico
List of National Historic Landmarks in New Mexico

References

Buildings and structures in Doña Ana County, New Mexico
Historic American Engineering Record in New Mexico
Military installations established in 1946
Military facilities on the National Register of Historic Places in New Mexico
Military history of New Mexico
National Historic Landmarks in New Mexico
National Register of Historic Places in Doña Ana County, New Mexico
Rocket launch sites in the United States
White Sands Missile Range
1946 establishments in New Mexico
Union Pacific International Railroad Bridge. The Union Pacific International Railroad Bridge is the only railway international bridge that crosses the U.S.-Mexico border between the cities of Eagle Pass, Texas, and Piedras Negras, Coahuila. The U.S. portion is owned and operated by Union Pacific Railroad, with BNSF Railway having trackage rights.  The Mexican portion is owned by the Mexican federal government, with operation concessioned to Ferromex. It is also known as the Eagle Pass-Piedras Negras International Railway Bridge. The bridge is the second busiest international rail crossing between the U.S. and Mexico.

See also
 Brownsville & Matamoros International Bridge

References

International bridges in Texas
International bridges in Coahuila
Buildings and structures in Maverick County, Texas
Railroad bridges in Texas
Railway bridges in Mexico
International
Southern Pacific Railroad
Transportation in Maverick County, Texas
Metal bridges in the United States
Truss bridges in the United States