omniomni/omni-engineering huggingface dataset:
Mailam Engineering College. Mailam Engineering College is a private engineering college, founded in 1998, in the Villupuram district of Tamil Nadu, India. The college is approved by the All India Council for Technical Education in New Delhi and affiliated with Anna University, Chennai. The college is built in a campus of 42 acres, situated adjacent to the Sri Subramaniam Swamy Koil, Mailam, and Sri Vakkarakali Amman Koil, Thiruvakkarai.

Courses 
The college offers Eight undergraduate courses and six postgraduate courses including M.B.A. and M.C.A.

Undergraduate Departments

Post Graduate programs

Facilities
The college is provided with an air-conditioned auditorium to accommodate 750 students.

References

Engineering colleges in Tamil Nadu
Colleges affiliated to Anna University
Education in Viluppuram district
Educational institutions established in 1998
1998 establishments in Tamil Nadu
Hexabenzocoronene. Hexa-peri-hexabenzocoronene (HBC) is a polycyclic aromatic hydrocarbon with the molecular formula C42H18. It consists of a central coronene molecule, with an additional benzene ring fused between each adjacent pair of rings around the periphery. It is sometimes simply called hexabenzocoronene, however, there are other chemicals that share this less-specific name, such as hexa-cata-hexabenzocoronene.

Hexa-peri-hexabenzocoronene has been imaged by atomic force microscopy (AFM) providing the first example of a molecule in which differences in bond order and bond lengths of the individual bonds can be distinguished by a measurement in direct space.

Supramolecular structures 
Various hexabenzocoronenes have been investigated in supramolecular electronics. They are known to self-assemble into a columnar phase. One derivative in particular forms carbon nanotubes with interesting electrical properties.  The columnar phase in this compound further organises itself into sheets, which ultimately roll up like a carpet to form multi-walled nanotubes with an outer diameter of 20 nanometers and a wall thickness of 3 nm. In this geometry, the stacks of coronene disks are aligned with the length of the tube. The nanotubes have sufficient length to fit between two platinum nanogap electrodes produced by scanning probe nanofabrication and are 180 nm apart. The nanotubes as such are insulating, but, after one-electron oxidation with nitrosonium tetrafluoroborate (), they conduct electricity.

Synthesis 
Organic synthesis of a hexabenzocoronene starts with an Aldol condensation reaction of dibenzyl ketone with a benzil derivative to give a substituted cyclopentadienone. A Diels–Alder reaction with alkyne and subsequent expulsion of carbon monoxide gives a hexaphenylbenzene. The adjacent pairs of benzene rings undergo oxidative electrocyclic reactions and aromatization by oxidation by iron(III) chloride in nitromethane.

References

External links

Polycyclic aromatic hydrocarbons
John J. Gilman. John Joseph "Jack" Gilman (December 22, 1925 – September 10, 2009) was an American material scientist in the field of mechanical properties of solids. He made major contributions to many areas of the field including dislocation behavior of ceramics, disclination behavior of polymers, and production of metal glasses.

Life 
John J. Gilman was born in Green Bay, Wisconsin. In 1946, he received both his Bachelor of Science in mechanical engineering and his Master of Science from the Illinois Institute of Technology. In 1952, Gilman received PhD in physical metallurgy from Columbia University. In 1952, he briefly worked at the Crucible Steel Company of America as a steel researcher and subsequently worked at the General Electric Research Laboratory that same year. While working at the General Electric laboratory, he expanded his studies in mechanical properties and the structure of single crystals.

After leaving General Electric in 1960, Gilman became a professor of engineering at Brown University. He moved to University of Illinois as a professor of physics and metallurgy in 1963. In 1968, he became director of the Materials Research Center at Allied Chemical. At Allied, he worked on metallic glasses. In 1978, he became director of the Corporate Development Center. In 1980, he became a research manager at Standard Oil. In 1981, he became a director of Amoco Battery Technology. In 1985, he became a director of the Center for Advanced Materials at Lawrence Berkeley National Laboratory at the University of California, Berkeley. In 1987, he became a senior scientist studying the crystalline structure and mechanical properties of solids. In 1993, he became an adjunct professor at the University of California, Los Angeles.

Discoveries

In all, 330 scientific papers were published under his name on topics including metals, ceramics, glasses, semiconductors, polymers, diamond and nano-materials. Gilman was editor and co-editor of three books and author of four. His work also resulted in him acquiring several patents including one for rhenium boride compounds to be used as abrasives, cutting tools and as protective coatings. Gilman is known for his contributions to the field of material science (dislocations in ceramics, disclinations in polymers, and new metal glasses).

Gilman designed a tetrahedral truss different from Buckminster Fuller's famous 1953 truss in 1981. Gilman attributed the strength of his tetrahedral truss to "the inherent rigidity of the skeletal triangle" and "the rigidity of the basic tetrahedron".

Honors
For his contributions to material science and research management in industry Professor Gilman received honors and recognitions worldwide.

References

External links
 ASM: Tribute to Jack Gilman

1925 births
2009 deaths
People from Green Bay, Wisconsin
Illinois Institute of Technology alumni
Columbia School of Engineering and Applied Science alumni
General Electric people
Brown University faculty
UCLA Henry Samueli School of Engineering and Applied Science faculty
University of Illinois faculty
American materials scientists
Fellows of the Minerals, Metals & Materials Society
Letsibogo Dam. The Letsibogo Dam is a dam on the Motloutse River in Botswana, built to initially provide water to the industrial town of Selebi-Phikwe and surrounding areas, with the potential for use in irrigation. The dam now supplies Gaborone, the capital of the country, via a  pipeline, as well as major villages along the pipeline route.

Location and climate

The dam is located near the village of Mmadinare.
The climate is tropical and semi-arid, with 90% of rainfall during the period from November to March. Mean annual precipitation is about  in the catchment area above the dam. It is very variable, with rainfall less than 40% of the average expected in one year in seven. In August 2012 the dam was only one-third full, prompting concerns that there could soon be water shortages in the areas of Palapye, Mahalapye and Gaborone. Some blamed the problem in part to slow repair of leaking pipelines.

Structure and operations

The dam was designed for the Ministry of Minerals, Energy and Water Resources by Arup, who also supervised construction of the water storage embankment and central clay-core dam.  It has storage capacity of . 
It is operated by the Water Utilities Corporation.
The dam is part of the North-South Carrier Water Project, which includes other dams, water transmission systems and water treatment works,
bringing water from the northeast of Botswana to the southeast.  It is linked to Gaborone by a  pipeline.
The initial North South Carrier Scheme cost about US$350 million, and came into operation in 2000.

Reservoir uses

Although primarily designed for water storage, the dam is being promoted for tourists as a place for water sports and fishing.
In 2011 the government announced plans to upgrade the infrastructure round the dam, include roads, sewage and drinking water, 
and to create the first artificial beach in Botswana on the northern part of Letsibogo dam. 
The local government was planning to build a 5-star eco-lodge and a game reserve.

References
Citations

Sources

  

 

Dams completed in 2000
Dams in Botswana
Aerolab LoCamp. The Aerolab LoCamp is an Italian amateur-built aircraft, designed and originally produced by Aerolab SRL of Gallarate. The aircraft is supplied as a kit for amateur construction, although the company plans to also certify the aircraft to JAR-VLA as well as produce a light-sport aircraft category version.

The LoCamp design is now produced by one of Aerolab's original dealers, Golden Age Aeroworks, LLC of Richland Center, Wisconsin, United States.

Design and development
The LoCamp is intended to resemble a 1930s style light aircraft. It features a cantilever low-wing, a two-seats-in-tandem open cockpit with polycarbonate windscreens, fixed conventional landing gear and a single engine in tractor configuration.

The aircraft fuselage is made from welded steel tubing, with the wing built from wood or optionally aluminium sheet and its flying surfaces covered in doped aircraft fabric. Its  span wing employs a NACA 4416 airfoil, has an area of  and mounts flaps. The standard engine available is the  Rotec R2800 four-stroke radial engine, although the  Walter Mikron MIIIC was under evaluation by the manufacturer.

In 2015 the manufacturer was considering producing a fully assembled special light-sport aircraft version.

Variants
LoCamp
Low wing monoplane model
HiCamp
Parasol wing model, that uses the same fuselage as the LoCamp model
BiCamp
Biplane model, that uses the same fuselage as the LoCamp model

Specifications (LoCamp)

References

External links

Homebuilt aircraft
Single-engined tractor aircraft
OU Campus. Omni CMS (formerly OU Campus) is a web content management system (CMS) for colleges, universities, and other higher education institutions.

Omni CMS (then known as OU Campus) was launched in 1999 using the cloud computing, software as a service (SaaS) product delivery model. It was developed by OmniUpdate, a privately owned company headquartered in Camarillo, CA. OmniUpdate was started by software developers Tom Nalevanko, Lance Merker, and Yves Lempereur (developer of BinHex 4.0). OmniUpdate and Destiny Solutions merged to form ModernCampus in March 2021.

Technology
The product uses a push technology. Omni CMS can be accessed via the cloud – also known as software as a service (SaaS). The underlying platform of Omni CMS is developed in Java, and uses XSLT 3.0 for template transformation. Omni CMS uses open standards, including XML, HTML, and CSS and is extensible through APIs. As a decoupled system, Omni CMS works with any server-side technology (e.g., PHP, ASP, .NET, ColdFusion) and for templates uses XHTML/HTML5 and CSS, as well as XML/XSLT.  The templates are customizable so that developers can create sites using popular web development techniques including Responsive web design to adapt to all screen sizes and devices.  Omni CMS does not store page content in a database; rather, each page is stored as an XML file on the CMS server. It is compatible with Internet Explorer, Firefox, Google Chrome, and Safari. Omni CMS' push technology architecture requires a separate database for some applications that use interactive content such as forms and surveys. These applications can be handled through the Live Delivery Platform (LDP), which provides a server-side module for plug-in application architecture. LDP is accessed and managed through Omni CMS.

Features
 Custom WYSIWYG toolbars
 Source code editing
 Instant publishing (no queues)
 Multi-channel output (e.g., HTML, XML, PDF, text, mobile)
 Content repurposing—Omni CMS allows users to repurpose content through Assets. Changes made to an asset are automatically changed on every page where that asset resides.
 Accessibility check
 Analytics
 Multi-browser preview
 Asset management
 Facebook and Twitter integration
 Global find and replace
 Updates made to web pages can be simultaneously made to mobile pages
 Omni CMS separates content from design, so users can style their content without breaking the page layout and design

References

External links 
 

Content management systems
Educational software
1999 software
Proprietary software
AeroLites Bearcat. The AeroLites Bearcat is an American amateur-built aircraft, designed and produced by AeroLites, of Welsh, Louisiana and introduced in 1984. The aircraft is supplied as a kit for amateur construction.

Design and development
The Bearcat features a strut-braced parasol-wing, a single-seat open cockpit, fixed conventional landing gear and a single engine in tractor configuration.

The aircraft fuselage is made from welded 4130 steel tubing with the wing constructed with an aluminum structure, with its flying surfaces covered in Dacron sailcloth. The ribs slide into pockets in the fabric. Its  span wing employs a Clark Y airfoil and has an area of . Standard engines available are the  Rotax 447, the  Rotax 503 and the  Rotax 582 two-stroke powerplants. Equipment to convert the aircraft for aerial application is also available.

The manufacturer claims that the supplied kit takes 60–90 hours to assemble.

Operational history
By 1998 the company had reported that nine Bearcats and two Ag Bearcats were flying.

Variants
Bearcat
Base model
Ag Bearcat
Model equipped as an agricultural aircraft, originally equipped with a  Rotax 532 engine.

Specifications (Bearcat)

References

External links

Homebuilt aircraft
Single-engined tractor aircraft
Bearcat
Parasol-wing aircraft
Aircraft first flown in 1984
1980s United States sport aircraft
Current limiting reactor. In electrical engineering, current limiting reactors can reduce short-circuit currents, which result from plant expansions and power source additions, to levels that can be adequately handled by existing distribution equipment.
They can also be used in high voltage electric power transmission grids for a similar purpose. In the control of electric motors, current limiting reactors can be used to restrict starting current or as part of a speed control system.

History 
Current limiting reactors, once called current limiting reactance coils, were first presented in 1915.
The inventor of the current limiting reactance coil was Vern E. Alden who filed the patent on November 20, 1917 with an issue date of September 11, 1923. The original assignee was Westinghouse Electric & Manufacturing Company.

Operation 
A current limiting reactor is used when the prospective short-circuit current in a distribution or transmission system is calculated to exceed the interrupting rating of the associated switchgear.  The inductive reactance is chosen to be low enough for an acceptable voltage drop during normal operation, but high enough to restrict a short circuit to the rating of the switchgear. 
The amount of protection that a current limiting reactor offers depends upon the percentage increase in impedance that it provides for the system.

The main motive of using current limiting reactors is to reduce short-circuit currents so that circuit breakers with lower short circuit breaking capacity can be used. They can also be used to protect other system components from high current levels and to limit the inrush current when starting a large motor.

Construction
It is desirable that the reactor does not go into magnetic saturation during a short circuit, so generally an air-core coil is used. At low and medium voltages, air-insulated coils are practical; for high transmission voltages, the coils may be immersed in transformer oil. 
Installation of air-core coils requires consideration of the magnetic field produced by the coils, which may induce current in large nearby metal objects. This may result in objectionable temperature rise and waste of energy.

Line reactor
A line reactor is an inductor wired between a power source and a load.  In addition to the current limiting function, the device serves to filter out spikes of current   and may also reduce injection of harmonic currents into the power supply.  The most common type is designed for three-phase electric power, in which three isolated inductors are each wired in series with one of the three line phases. Line reactors are generally installed in motor driven equipment to limit starting current, and may be used to protect Variable-frequency drives and motors.:)

See also
Electrical ballast

References 

Electrical engineering
Electric power transmission
American inventions
Over-current protection devices
Airdale Backcountry. The Airdale Backcountry is an American amateur-built aircraft that was designed by Brett McKinney and based upon John Larsen's Avid Mk IV design. It was produced by Airdale Flyer Company, of Rhinelander, Wisconsin, but the company went out of business in 2017 and production ended. When it was available the aircraft was supplied as a kit for amateur construction.

Design and development
The Backcountry features a strut-braced high-wing, a two-seats-in-side-by-side configuration enclosed cockpit with doors for access, fixed conventional landing gear and a single engine in tractor configuration.

The aircraft fuselage is made from welded 4130 steel tubing, while the wing is of aluminum construction, with all surfaces covered in doped aircraft fabric. Its  span wing has an area of  and flaperons. The Backcountry was designed to use the  Stratus EA 81 automotive conversion four-stroke powerplant.

The improvements over the Avid design include redesigning the aircraft to comply with the European Joint Aviation Requirements at a gross weight of , including stretching the fuselage by , changing the main landing gear legs to aluminum gear with a track of , increasing the angle of the windshield, simplifying the control system and designing a differential flaperon system, redesigning the structure in the cockpit area to improve baggage access, adding new seats, increasing cockpit headroom and legroom, introducing wider cockpit doors and more cockpit width, modifying the tailwheel spring for more strength and designing a new engine cowling to accommodate the Subaru engine and other engine designs.

The company also offered a conversion kit for existing Mk IVs.

Specifications (Backcountry)

References

External links

Airdale aircraft
Homebuilt aircraft
Single-engined tractor aircraft
Scandium hydride. Scandium hydride, also known as scandium–hydrogen alloy, is an alloy made by combining scandium and hydrogen. Hydrogen acts as a hardening agent, preventing dislocations in the scandium atom crystal lattice from sliding past one another. Varying the amount of hydrogen controls qualities such as the hardness of the resulting scandium hydride. Scandium hydride with increased hydrogen content can be made harder than scandium.

It can be formed by progressive hydrogenation of scandium foil with hydrogen.

In the narrow range of concentrations which make up scandium hydride, mixtures of hydrogen and scandium can form two different structures. At room temperature, the most stable form of scandium is the hexagonal close-packed (HCP) structure α-scandium. It is a fairly soft metallic material that can dissolve a moderate concentration of hydrogen, no more than 0.89 wt% at 22 °C. If scandium hydride contains more than 0.89% hydrogen at room temperature then it transforms into a face-centred cubic (FCC) structure, the δ-phase. It can dissolve considerably more hydrogen, as much as 4.29%, which reflects the upper hydrogen content of scandium hydride.

Research indicates the existence of a third phase created under extreme conditions termed the η-phase. This phase can dissolve as much as 6.30% hydrogen.

Concentration dependent activation-energies are observed for hydrogen diffusion in scandium metal.

References 

Metal hydrides
Scandium compounds
Rare earth alloys
Howard Chase (chemical engineer). Howard Allaker Chase FREng is a British academic and chemical engineer. He is Head of the School of Technology and Professor of Biochemical Engineering at the University of Cambridge. From 1998 to 2006 he was Head of the Department of Chemical Engineering at the University of Cambridge.
Chase has been a Fellow of the Royal Academy of Engineering since 2005. He is also a Fellow of the Institution of Chemical Engineers, a Member of the Royal Society of Chemistry, a Chartered Engineer, a Chartered Chemist, and a Chartered Scientist. 
In 2010 he was awarded the Donald Medal, an award of the Institution of Chemical Engineers, in recognition of his industrially related research in the field of bioseparations technology.
Chase was an undergraduate (Natural Sciences Tripos), and a research student (biochemistry) at Magdalene College, Cambridge, between 1972 and 1978. He held a research fellowship at St John's College, Cambridge, from 1978 to 1982. In 1984 he was elected to a fellowship at Magdalene College, Cambridge where he became director of studies in chemical engineering. He was tutor for graduate students 1987–1994, tutor 1994-1996 and senior tutor 1993–1996.

He was awarded the Beilby Medal and Prize in 1993.

References 

British chemical engineers
Living people
1954 births
Fellows of Magdalene College, Cambridge
Chemical engineering professors at the University of Cambridge
Fellows of St John's College, Cambridge
Ntimbale Dam. The Ntimbale Dam is a dam on the Tati River in Botswana.
It has a capacity of .

Construction

The dam project was assigned to Knight Piésold by the Botswana Department of Water Affairs. Piésold undertook the feasibility study in 1996–97, assisted in the tender process, prepared the detailed design and supervised construction between 2004 and 2009. The dam is a roller-compacted concrete dam  high, with a central ogee spillway. PPC Cement of South Africa, which has a blending and packing plant in Gaborone, supplied the cement for the project.
The dam complex includes pump stations and a water treatment plant, and supplies water to villages in the North East District and neighboring parts of the Central District.

The dam cost an estimated P205 million. While it was being built, a water-transfer scheme costing P280 million was undertaken to connect all of the 51 villages in the North East District. President Ian Khama commissioned the dam at a ceremony in October 2008, voicing the hope that it would meet domestic water supply needs for the next twenty years. He cautioned that people should continue to use water carefully and avoid waste.

References

Sources

 

Dams in Botswana