omniomni/omni-engineering huggingface dataset:
North Karo River. The North Karo River () drains the Indian state of Jharkhand.

It originates on the Ranchi Plateau. It forms a  high scarp falls, Pheruaghaugh,  at the southern margin of the Ranchi plateau. It drains the Gumla, Ranchi and West Singhbhum districts. It joins the South Koel near Serengda. The meandering valley of the Karo river, downstream from Pheruaghaugh falls is a typical example of an incised meander.

Koel-Karo project
The Koel-Karo project is located in the Ranchi and West Singbhum districts. The 710-mW power project involves the construction of two earth dams—one,  high, across the South Koel river near Basia, and the other,  high, across the North Karo river near Lohajima. The two dams will be linked by a trans-basin channel, with six units of 115 mW each in the underground powerhouse at Lumpu-ngkhel and one unit of 20 mW at Raitoli. About 120 villages are to be affected, displacing over one lakh (100,000) people. About  are to be submerged. Of the total land acquisition,  are reported to be agricultural land, while  comprise forests. Dispute arose over the compensation package for the displaced people and protests started in 1974 and have been continuing since then.

References

Rivers of Jharkhand
Lamé's stress ellipsoid. Lamé's stress ellipsoid is an alternative to Mohr's circle for the graphical representation of the stress state at a point. The surface of the ellipsoid represents the locus of the endpoints of all stress vectors acting on all planes passing through a given point in the continuum body. In other words, the endpoints of all stress vectors at a given point in the continuum body lie on the stress ellipsoid surface, i.e., the radius-vector from the center of the ellipsoid, located at the material point in consideration, to a point on the surface of the ellipsoid is equal to the stress vector on some plane passing through the point. In two dimensions, the surface is represented by an ellipse.

Once the equations of the ellipsoid is known, the magnitude of the stress vector can then be obtained for any plane passing through that point.

To determine the equation of the stress ellipsoid we consider the coordinate axes  taken in the directions of the principal axes, i.e., in a principal stress space. Thus, the coordinates of the stress vector  on a plane with normal unit vector  passing through a given point  is represented by

And knowing that  is a unit vector we have

which is the equation of an ellipsoid centered at the origin of the coordinate system, with the lengths of the semiaxes of the ellipsoid equal to the magnitudes of the principal stresses, i.e. the intercepts of the ellipsoid with the principal axes are .

 The first stress invariant  is directly proportional to the sum of the principal radii of the ellipsoid.
 The second stress invariant  is directly proportional to the sum of the three principal areas of the ellipsoid. The three principal areas are the ellipses on each principal plane.
 The third stress invariant  is directly proportional to the volume of the ellipsoid.
 If two of the three principal stresses are numerically equal the stress ellipsoid becomes an ellipsoid of revolution. Thus, two principal areas are ellipses and the third is a circle.
 If all of the principal stresses are equal and of the same sign, the stress ellipsoid becomes a sphere and any three perpendicular directions can be taken as principal axes.

The stress ellipsoid by itself, however, does not indicate the plane on which the given traction vector acts. Only for the case where the stress vector lies along one of the principal directions it is possible to know the direction of the plane, as the principal stresses act perpendicular to their planes. To find the orientation of any other plane we used the stress-director surface or stress director quadric represented by the equation

The stress represented by a radius-vector of the stress ellipsoid acts on a plane oriented parallel to the tangent plane to the stress-director surface at the point of its intersection with the radius-vector.

References

Bibliography

Classical mechanics
Materials science
Elasticity (physics)
Solid mechanics
Mechanics
Naval Auxiliary Landing Field Fentress. Naval Auxiliary Landing Field Fentress  is a military use airport located in Chesapeake, Virginia. This military airport is owned by the U.S. Navy and is under the operational control of Naval Air Station Oceana, Virginia.  The airfield primarily supports day and night Field Carrier Landing Practice (FCLP) operations by US Navy and US Marine Corps F/A-18 Hornet, and US Navy F/A-18 Super Hornet, E-2 Hawkeye and C-2 Greyhound aircraft based in Virginia and the Carolinas.

Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned NFE by the FAA but has no designation from the IATA.

Facilities 
Fentress NALF has one operational runway designated Runway 5/23 with an asphalt surface measuring 8,004 by 175 feet (2,440 x 53 m).  Four additional shorter paved runways dating from the airfield's original construction during World War II are located in the airfield's northern quadrant.  These additional runways are closed to aircraft.
On 5 July 2011, it was announced that NALF Fentress would close in January 2012 for 9 months for major repairs. Touch and go maneuvers would move to Naval Air Station Oceana and Naval Station Norfolk Chambers Field.  As of 15 October 2012 the airfield was reopened.

Encroachment issues
At the end of June 2014 the Chesapeake City Council voted unanimously to use city and state funds, who plan to put up about $1 million each, to buy property near the Fentress Naval airport in order to prevent encroachment onto the airfield. This is similar to a program of Virginia Beach, Virginia and the state of Virginia regarding Naval Air Station Oceana.

References

External links 
 Aerial photo as of 9 April 1990 from USGS The National Map
 

Airports in Virginia
Buildings and structures in Chesapeake, Virginia
Fentress
Transportation in Chesapeake, Virginia
Zirconium(III) chloride. Zirconium(III) chloride is an inorganic compound with formula ZrCl3. It is a blue-black solid that is highly sensitive to air.

Preparation
The material was first claimed by Ruff and Wallstein who reduced zirconium tetrachloride with aluminium to give impure samples. Subsequently, the problem with aluminium contamination was solved when it was prepared by reduction using zirconium metal:
Zr + 3 ZrCl4 → 4 ZrCl3

When aluminium is used as the reducing agent with zirconium tetrachloride, a series of choloroaluminates are formed, for example [Zr(AlCl4)2(AlCl4)2] and Zr(AlCl4)3.

Since the trihalides, such as zirconium trichloride, are comparatively nonvolatile, contamination can be avoided by using a gaseous reductant. For example, zirconium trichloride can be prepared by reduction of zirconium tetrachloride with hydrogen.
ZrCl4 + ½ H2 → ZrCl3 + HCl

Structure
Some zirconium halides (ZrCl3, ZrBr3, and ZrI3) have structures similar to HfI3. They also have similar space group (P63/mcm) and hexagonal structure with 2 molecules in the cell. The magnetic susceptibility of zirconium trichloride suggests metal-metal interactions of the unpaired electron on each Zr(III) center. The magnetic moment of ZrCl3 (0.4 BM) indicates considerable overlap of metal orbitals.

References

Zirconium(III) compounds
Chlorides
Metal halides
Jamie Wilkinson. Jamie Wilkinson is an internet culture researcher and software engineer. Wilkinson started Know Your Meme, a database of viral internet memes whilst working at Rocketboom in New York City. Wilkinson also co-founded VHX, a digital distribution platform targeting independent filmmakers, which was acquired by Vimeo in May 2016.

Career 
Wilkinson is a virtual research fellow of the Free Art and Technology Lab. His work was featured in F.A.T. Gold: Five Years of Free Art & Technology, a retrospective of F.A.T. Lab's work, at Eyebeam, MU Eindhoven, and Gray Area Foundation for the Arts. He also co-founded video sharing and payment platform VHX. Wilkinson was Eyebeam's systems administrator in 2006.

In August, 2010 Wilkinson won an Emmy for "Outstanding Creative Achievement in Interactive Media - Fiction" for his work in collaborating with Casey Pugh, Annelise Pruitt and Chad Pugh on Star Wars Uncut, a web-based platform and community where users can recreate their favorite scenes from Star Wars.

In addition to his online video work, Wilkinson taught an "Internet Famous" class at Parsons graduate Design & Technology Program that examined internet attention, specifically how it could be manipulated and aggregated via different strategies. Students’ grades were determined solely based on their ability to garner online attention in the form of web page views, video views, Twitter followers, and "favorites."

References

External links

Primetime Emmy Award winners
Internet culture
Living people
Place of birth missing (living people)
Software engineers
Year of birth missing (living people)
Erez Petrank. Erez Petrank () is a computer scientist whose notable research contributions are in the fields of programming languages and computer systems (mostly on memory management), cryptography (mostly on theoretical foundations), computational complexity, and parallel computing. Petrank is currently (2024) a professor of computer science at the Technion - Israel Institute of Technology, where he holds the Andrew and Erna Viterbi Chair. 

Petrank has published more than ninety papers in top conferences and journals with more than 7000  citations and an h-index of 49 (computed by Google Scholar). 
He has served as the program chair of the International Symposium on Memory Management, the ACM SIGPLAN/SIGOPS International Conference on Virtual Execution Environments (VEE), the ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming (PPOPP), and the ACM Symposium on Parallelism in Algorithms and Architectures (SPAA). From 2009 to 2012, Petrank served on the Association for Computing Machinery SIGPLAN Executive Committee.

Professor Petrank is married to Yael Petrank, 
who holds a Ph.D. in Biomedical Engineering 
and is actively involved in the development of medical devices. Together, they are parents to three children: Dana, Maya, and Iddo.

References

Living people
Israeli computer scientists
Academic staff of Technion – Israel Institute of Technology
Year of birth missing (living people)
Saturation mutagenesis. Saturation mutagenesis, or site saturation mutagenesis (SSM), or simply site saturation, is a random mutagenesis technique used in protein engineering, in which a single codon or set of codons is substituted with all possible amino acids at the position. There are many variants of the site saturation technique, from paired site saturation (saturating two positions in every mutant in the library) to scanning site saturation (performing a site saturation at every site in the protein, resulting in a library of size [20^(number of residues in the protein)] that contains every possible point mutant of the protein).

Method 

Saturation mutagenesis is commonly achieved by site-directed mutagenesis PCR with a randomised codon in the primers (e.g. SeSaM) or by artificial gene synthesis, with a mixture of synthesis nucleotides used at the codons to be randomised.

Different degenerate codons can be used to encode sets of amino acids. Because some amino acids are encoded by more codons than others, the exact ratio of amino acids cannot be equal. Additionally, it is usual to use degenerate codons that minimise stop codons (which are generally not desired). Consequently, the fully randomised 'NNN' is not ideal, and alternative, more restricted degenerate codons are used. 'NNK' and 'NNS' have the benefit of encoding all 20 amino acids, but still encode a stop codon 3% of the time. Alternative codons such as 'NDT', 'DBK' avoid stop codons entirely, and encode a minimal set of amino acids that still encompass all the main biophysical types (anionic, cationic, aliphatic hydrophobic, aromatic hydrophobic, hydrophilic, small). In the case there is no restriction to use a single degenerate codon only, it is possible to reduce the bias considerably. Several computational tools were developed to allow high level of control over the degenerate codons and their corresponding amino acids.

Applications 
Saturation mutagenesis is commonly used to generate variants for directed evolution.

See also 
 Sequence saturation mutagenesis

References

Genetics techniques
Molecular genetics
Mutagenesis
Hooghly Engineering and Technology College. Hooghly Engineering and Technology College (HETC) is a self financed engineering college run by the Hooghly Engineering & Technology College Society, engaged in the promotion of technical education amongst students and the dissemination of scientific knowledge in society. The institute is affiliated with Maulana Abul Kalam Azad University of Technology (formally known as WBUT). It is recognised by the Government of West Bengal and its courses are approved by the All India Council for Technical Education (AICTE).

Campus
HETC is in Hooghly of Hooghly District  in West Bengal, India. It is  from the Hooghly railway station and approximately  from Hooghly Ghat railway station. One half of the campus is connected through Wi-Fi. The college consists of an academic and administrative building, a library and a vast area of open land.

Hostel
There is a hostel for female students inside of the college campus while the hostel for male students is external.

Academics
Hooghly Engineering and Technology College offers undergraduate programs in engineering disciplines. The college offers B.Tech in Computer Science and Engineering, Electronics and Communication Engineering, Electrical Engineering, Civil Engineering, and Mechanical Engineering.

Admission
Admission to the B.Tech courses is on the basis of the position secured by the candidate in the West Bengal Joint Entrance Examination And Joint Entrance Examination – Main.

In all courses, 90% of students of approved intake capacity are admitted on the basis of merit position secured by the candidate in West Bengal Joint Entrance Examination. The 10% balance of students are admitted from Joint Entrance Examination – Main as per the norms stipulated by the UGC and the West Bengal.

Diploma holders in any engineering and technical discipline can enter for a degree course in the second year at HETC, through the admission test JELET conducted by Central Selection Committee (CSC).

Among these, some (1 or 2) seats are also available for Reserved Category, Tuition Fee Waiver (TFW) and PwD candidates.

Training and placement
The training and placement cell arranges vacational training and placement for students at organizations like Indian Air Force, L&T, VECC, Air India, Doordarshan, BSNL, DRDO, WBPDCL, WBSEDCL, Eastern Railways (India), NTPC, DVC, CLW, Simplex,  Bridge & Roof, KMDA, Shapoorji Pallonji Group, Gannon Dunkerley & Company, TCS, mPockket., West Bengal State Electricity Transmission Company (WBSETCL), Maulana Abul Kalam Azad University of Technology, Tatia Topi Engineering Works, West Bengal State Council of School Education and IBM.

References

External links
 http://www.hetc.ac.in/ – Official website

Engineering colleges in West Bengal
Universities and colleges in Hooghly district
Colleges affiliated to West Bengal University of Technology
Educational institutions established in 2004
2004 establishments in West Bengal
Memento Project. Memento is a United States National Digital Information Infrastructure and Preservation Program (NDIIPP)–funded project aimed at making Web-archived content more readily discoverable and accessible to the public.

Technical description

Memento is defined in RFC 7089 as an implementation of the time dimension of content negotiation.  HTTP accomplishes negotiation of content via a variety of headers that allow clients and servers to find content that the user desires.

The  header provided by HTTP does not necessarily reflect when a particular version of a web page came into existence. Also, the  header may not exist in some cases.  To provide more information, the  header has been introduced to indicate when a specific representation of a web page was observed on the web.

Usage

Copies of page can be found by simply navigating, in a web browser, to a link formatted, replacing urltoarchive with the full URL of the page desired:

JSON description of a Memento:
 http://timetravel.mementoweb.org/api/json/YYYY/urltoarchive
 http://timetravel.mementoweb.org/api/json/YYYYMM/urltoarchive
 http://timetravel.mementoweb.org/api/json/YYYYMMDD/urltoarchive
 http://timetravel.mementoweb.org/api/json/YYYYMMDDHH/urltoarchive
 http://timetravel.mementoweb.org/api/json/YYYYMMDDHHMM/urltoarchive
or
redirect to a Memento with a datetime that is close to a desired datetime:
 http://timetravel.mementoweb.org/memento/YYYY/urltoarchive
 http://timetravel.mementoweb.org/memento/YYYYMM/urltoarchive
 http://timetravel.mementoweb.org/memento/YYYYMMDD/urltoarchive
 http://timetravel.mementoweb.org/memento/YYYYMMDDHH/urltoarchive
 http://timetravel.mementoweb.org/memento/YYYYMMDDHHMM/urltoarchive

References

External links
 Memento Project
 The When of the Web - Extensive information about the proposal and experiment is available in the November 2009 paper
 Memento: Time Travel for the Web
 http://lanlsource.lanl.gov/hello
 http://www.cdlib.org/cdlinfo/2010/02/04/web-archive-discovery-memento-implementation-meeting/

Web archiving
Web archiving initiatives
Los Alamos National Laboratory
Old Dominion University
Fairchild M-84. The Fairchild M-84 was a four-seat cabin aircraft designed using PT-19 components.

Design and development
With a large number of surplus trainers available on the post-Second World War market, Fairchild sought a way to modify its existing M-62 trainer and tooling into a four-place personal aircraft. The M-62 was a low-wing, fixed landing gear, open cockpit aircraft. The steel-tube fuselage was widened, a cabin structure was added and retractable landing gear were retrofitted using many of the same gear leg and strut parts. The wing outer panels and tail section remained unchanged. An inline engine installation was initially designed, but a Continental Motors radial was installed. With the introduction of the Beechcraft Bonanza, Ryan Navion, Bellanca Cruisair and the TEMCO F-24 at about the same time, the market was considered too saturated to produce the M-84.

Operational history
The first flight occurred in December 1945. The prototype was used as an executive transport for five years. On 29 May 1951, the M-84 was donated to Washington County, Maryland with chief pilot Richard A. Henson taxiing the aircraft to the Hagerstown High School in a parade. The aircraft was never used for education and eventually was scrapped after years of vandalism.

Specifications (M-84)

See also

References

External links
Image of a M-84

Fairchild aircraft
List of aircraft at the Imperial War Museum Duxford. This list of aircraft at the Imperial War Museum Duxford summarises the collection of aircraft that is housed at the Imperial War Museum Duxford in Cambridgeshire, England.

Imperial War Museum owned
Aircraft based at Duxford owned by the Imperial War Museum:

AirSpace Hangar
Aircraft on display that are the property or on loan to the Imperial War Museum or the Duxford Aviation Society:

Air and Sea

Battle of Britain
Imperial War Museum Battle Of Britain Collection.

Conservation in Action
Imperial War Museum Restoration Hanger.

American Air Museum
Aircraft owned or on loan to the Imperial War Museum and displayed in the American Air Museum:

Duxford Aviation Society Apron
Aircraft owned or on loan to the Duxford Aviation Society:

References

Aerospace museums in England
Imperial War Museum Duxford
Collection of the Imperial War Museum
SS Empire Cloud. Empire Cloud was a  cargo ship which was built in 1940 by William Pickersgill & Sons Ltd, Sunderland for the Ministry of War Transport (MoWT). She was torpedoed on her maiden voyage, but repaired and returned to service. In 1942, she was torpedoed and sank whilst under tow to port.

Description
The ship was built by William Pickersgill & Sons Ltd, Sunderland. She was launched on 27 December 1940 and completed in April 1941.

The ship was  long, with a beam of  and a depth of . She had a GRT of 5,669 and a NRT of 3,546.

The ship was propelled by a triple expansion steam engine, which had cylinders of ,  and   diameter by  stroke. The engine was built by George Clarke (1938) Ltd, Sunderland.

History
Empire Cloud was built for the MoWT. She was placed under the management of Allen, Black & Co Ltd. Her port of registry was Sunderland. The Code Letters BCGC and United Kingdom Official Number 168668 were allocated.

Empire Cloud was a member of a number of convoys during the Second World War.

OB 318
Convoy OB 318 departed from Liverpool on 2 May 1941 and dispersed at sea on 10 May. Empire Cloud was on her maiden voyage. At 14:28 on 9 May, Empire Cloud was torpedoed and damaged by  when east northeast of Cape Farewell (). Five crew were killed, the survivors were picked up by . The ship was abandoned, but  assisted in the protection of her while the Dutch tug Thames was despatched from Reykjavík, Iceland.  also assisted Empire Cloud. Thames arrived on 13 May and towed Empire Cloud at  to Greenock, where she arrived on 20 May. She was repaired and returned to service.

HX 167
Empire Cloud may have sailed in Convoy HX 167, which departed Halifax, Nova Scotia on 27 December 1941 and arrived at Liverpool on 11 January 1942. She is noted under Convoy SC 63 as having come from HX 167.

SC 63
Convoy SC 63 departed from Sydney, Cape Breton on 3 January 1942 and dispersed at sea on 13 January. Empire Cloud was carrying a general cargo and was bound for Manchester.

TAW(S)
Empire Cloud was a member of Convoy TAW(S). At about 10:10 on 19 August 1942, Empire Cloud was torpedoed by  northeast of Trinidad with the loss of three crew members. The Dutch tug Roode Zee took her in tow, but she sank on 21 August at . The surviving crew were rescued by other ships in the convoy. They were landed at Key West, Florida and Mobile, Alabama. Those lost on Empire Cloud are commemorated at the Tower Hill Memorial, London.

References

1940 ships
Ships built on the River Wear
Empire ships
Ministry of War Transport ships
Steamships of the United Kingdom
Maritime incidents in May 1941
Maritime incidents in August 1942
Ships sunk by German submarines in World War II
World War II shipwrecks in the Caribbean Sea
Open Environment Corporation. Open Environment Corporation (OEC) was founded by John J. Donovan in 1992 in Cambridge, Massachusetts, USA. OEC develops that enables companies to create applications for distributed, client/server computing systems. OEC pioneered a three-tiered software architecture that allows customer to rapidly develop, deploy and manage software applications to access critical information quickly on an enterprise-wide basis.

History

In 1992, Open Environment Corporation was founded in Cambridge, Massachusetts (USA) by John J. Donovan, former chairman. It was initially founded as a division of Cambridge Technology Group, and then spun-out in 1992.

On February 10, 1995, OEC completed its initial public offering on NASDAQ under ticker OPEN.

On August 31, 1995, OEC bought Jarrah Technologies Pty. Limited in a stock-swap.

In 1996 OEC was bought out by Borland.

Products

OEC Toolkit is a set of client/server application development software. OEC sold and marketed this product jointly with IBM. The product, which eventually would become known as Entera, and was the first middleware product sold as a best-of-breed application server platform.

Notes

Software companies based in Massachusetts
Defunct software companies of the United States
1996 mergers and acquisitions
1995 initial public offerings