omniomni/omni-engineering huggingface dataset:
Jahia. Jahia is a software company offering enterprise products, services, and technical support for its open-source digital experience platform. Jahia’s platform provides content and customer data management. The company’s head optional content management system and digital experience platform is designed to support various digital enterprise initiatives, such as websites, progressive web applications, mobile apps, intranets and portals.

Products 

Products

 jContent – A hybrid content management system (CMS)
 jExperience – A digital experience (DX) solution combining customer data with content management for personalized customer experiences
 jCustomer – An open source Customer Data Platform (CDP) built with Apache Unomi

Architecture

 Java based
 API-first platform
 Head optional / hybrid CMS
 Cloud or on premises

History 

 2002: The company was founded in Geneva, Switzerland. As of 2020, it has offices in Switzerland, the United States, France and Canada.
 2015: Jahia completed a $22.5 million round of financing from Invus
 2018: Jahia donated its open source CDP to The Apache Software Foundation.
 2019: Graduation of Apache Unomi as a Top-Level Project (TLP) of The Apache Software Foundation (ASF).

References

External links 
 

Portal software
Nengo Bridge Hydroelectric Power Station. Nengo Bridge Hydroelectric Power Station, often referred to as Nengo Bridge Power Station is a planned  mini-hydroelectric power station in Uganda, the third-largest economy in the East African Community.

Location
The power station is located across the Mirera River between Rukungiri District and Kanungu District at the location of Nengo Bridge, along the road between Rukungiri and Kanungu. This location lies approximately , by road, southwest of Rukungiri.

Overview
Nengo Bridge Power Station is run of the river, mini-hydropower installation, with planned capacity of 6.7 MW. Jacobsen Elektro, a Norwegian power development company, through its Ugandan subsidiary, Jacobsen Elektro Uganda Limited, owns the development rights to the power station. Jacobsen Elektro also owns the 50-Megawatt Namanve Thermal Power Station in Mukono District, which they developed in 2008.

Construction costs
, the exact construction budget for the power plant and the high-tension power lines that will evacuate the generated electricity to where it will be integrated into the national grid is not publicly known. As a comparison, Kanungu Power Station with capacity of , was developed by a different company between 2008 and 2011 at a total cost of US$14 million. Kanungu Power Station in the town of Kanungu, lies about , by road, southwest of Nengo Bridge.

Construction time table
The power station is one of the nine renewable energy projects in Uganda that were awarded production licenses in October 2014 by the Electricity Regulatory Authority (ERA). Construction is expected to start in December 2014, and last approximately two years.

See also

List of power stations in Uganda
Africa Dams
Power Dams

References

External links
  Estimated Location of Nengo Bridge Hydropower Station At Google Maps
  Rukungiri District Homepage

Hydroelectric power stations in Uganda
Rukungiri District
Western Region, Uganda
Cavitation (elastomers). Cavitation is the unstable unhindered expansion of a microscopic void in a solid elastomer under the action of tensile hydrostatic stresses.  This can occur whenever the hydrostatic tension exceeds 5/6 of Young's modulus.

The cavitation phenomenon may manifest in any of the following situations:
 imposed hydrostatic tensile stress acting on a pre-existing void 
 void pressurization due to gases that are generated due to chemical action (as in volatilization of low-molecular weight waxes or oils:  'blowpoint' for insufficiently cured rubber, or 'thermal blowout' for systems operating at very high temperature)
 void pressurization due to gases that come out of solution (as in gases dissolved at high pressure)

References
 

Rubber properties
Franklinphilite. Franklinphilite is a phyllosilicate of the stilpnomelane group. Known from only two localities (with a third unconfirmed locality in Switzerland)  It was found exclusively from the Franklin and Sterling Hill mines in Franklin, Sussex County, New Jersey. until 2013, when a locality in Wales was confirmed

Composition 

Franklinphilite has an ideal chemical formula of  (with n~6). Reported formula is .

Structure 

Consistent with phyllosilicates, franklinphilite is composed of long flat sheets of linked silicon-oxygen and aluminium-oxygen tetrahedra bounded by an octahedral layer containing either potassium or manganese and is isostructural with lennilienapeite.

Physical properties 

Franklinphilite is dark brown to black and possesses a vitreous to slightly resinous luster. It is brittle with a hardness of about 4 (Mohs) and cleaves imperfectly along the {001} plane.   The density varies due to impurities, but ranges from 2.6 to 2.8 g/cm3 compared to the calculated value of 2.66 g/cm3. It is translucent to nearly opaque, translucent in thin section and has a light brown streak. Pleochroism is distinctive with X = pale yellow and Y,Z = deep brown. Dispersion was not detected and no evident fluorescence under ultra-violet radiation was observed.

History 

In 1938, C. Osborne Hutton described a manganoan member of stilpnomelane and incorrectly assumed it to be parsettensite. It was later described in 1984 by Pete J. Dunn, Donald R. Peacor and William B. Simmons as a Mn dominant stilpnomelane similar to parsettensite. Naming franklinphilite was deferred then due to findings of only 34 mol % of the theoretical manganese end-member, making it manganese dominant by plurality. In 1992, franklinphilite was revisited by Dunn, Peacor and Shu-Chu Su and given an International Mineral Association recognized name. Although all franklinphilite specimens originated exclusively from the Buckwheat dump, large amounts of manganese silicates in the area suggest a high probability of other assemblages. Franklinphilite was named for the type locality (Franklin) and the Greek word φιλόϛ (philos) meaning friend. The name alludes to the unique elements of its chemical composition that contribute to the uniqueness of Franklin and Sterling Hill and the geologists, mineralogists and collectors, friends of Franklin, who helped contribute towards the understanding of the region.

References 

Phyllosilicates
Triclinic minerals
Optical membrane. Membrane optics is a flat lens that employs plastic in place of glass to diffract rather than reflect or refract light. Concentric microscopic grooves etched into the plastic provide the diffraction.

Glass transmits light with 90% efficiency, while membrane efficiencies range from 30 to 55%. Membrane thickness is on the order of that of plastic wrap.

Applications

MOIRE program 
DARPA plans to use membrane optics as part of its Membrane Optical Imager for Real-Time Exploitation (MOIRE) program. The program uses lightweight polymer membranes for a  foldable plastic orbital telescope capable of seeing a  object from  away. Membrane grooves range from 4 to hundreds of micrometers in width.

According to DARPA, glass-based optics in satellites are reaching the point where larger mirrors exceed the lifting power of existing rockets. MOIRE is planned to be one-seventh the weight of a comparable glass-mirrored device.

Individual membranes would be mounted on foldable metal petals. Once in geostationary orbit, the satellite would unfold. The membrane lens occupies one end and a sensor suite the other.

The device would be the largest telescope ever built – twice the size of the ground-based twin  Keck telescopes. It could see about 40 percent of the Earth's surface and could image a  area at a  resolution and generate videos at one frame per second.

A ground-based prototype consists of a section of a  wide device that created the first images with membrane optics.

See also
Zone plate

References

External links 
 
 
 Nautilus Space Telescope

Telescope types
Hui-Hai Liu. Hui-Hai Liu () is a reservoir engineer and hydrogeologist. He specializes in fracture reservoir, coupled hydrological and mechanical processes, physics and properties of subsurface multiphase flow and transport, and their applications in reservoir engineering and nuclear waste management.

Biography
He received a 1983 B.S. in hydraulic machinery from Beijing Agricultural Engineering University, China, and a 1986 MS in fluid engineering from  Huazhong University of Science and Technology, China, with a thesis "An improved singularity method to describe water flow in hydraulic turbines." He then received a Ph.D. in the United States, with a degree in soil physics from Auburn University in 1995 for a thesis "An experimental and numerical study on fingering flow and mixing of variable density contaminants in porous media".

He served as an assistant professor in the Department of Environmental System Engineering, Clemson University from 1995 to 1997 and came to California in 1997 as research scientist at Lawrence Berkeley National Laboratory (LBNL). He had served as head of the Hydrogeology and Reservoir Dynamics Department at LBNL from 2009 to 2012. Since 2014, he has been with Aramco Research Center.

Research
He has one research monograph and more than 100 peer-reviewed articles/book chapters published,  and made several major original contributions in his areas, including the development of (1) the active fracture model (AFM) that has been used as the base-case theory of flow and transport in unsaturated fractured rock by the Yucca Mountain nuclear waste repository Project, (2) the two-part Hooke's model (TPHM) by generalizing Hooke's law to incorporate mechanical heterogeneity of natural rocks, and (3) a new multiphase-flow theory based on the optimality principle that fingering multiphase flow in the subsurface is self-organized in such a way that total flow resistance is minimal.

Honors
He became a fellow of the Geological Society of America in 2007 and a distinguished member of Society of Petroleum Engineers in 2017. He is also a recipient of Emil Truog soil science award from Soil Science Society of America and a Director's award for exceptional achievement from Lawrence Berkeley National Laboratory.

References

Living people
Hydrogeologists
20th-century births
Huazhong University of Science and Technology alumni
Auburn University alumni
Clemson University faculty
Lawrence Berkeley National Laboratory people
Year of birth missing (living people)
Fellows of the Geological Society of America
Paul Westbury. Paul Westbury is the CEO of the engineering company Buro Happold.

Career 
Westbury graduated from Jesus College, Cambridge University with a first-class degree in engineering science. He then joined BuroHappold Engineering in 1991. In 2000, he was made a partner of BuroHappold Engineering and now is a chartered structural engineer.

He developed a specialisation in sports and entertainment buildings and has led the teams responsible for engineering on several award-winning projects. Following several senior positions within the company, Westbury took on the role of CEO at Buro Happold Engineering in March 2011. He has written and presented several technical papers and lectured at Cambridge, Yale, and the Massachusetts Institute of Technology (MIT).

Recognitions and awards 
Westbury is a Fellow of the Institution of Civil Engineers, the Royal Academy of Engineering, the Institution of Structural Engineers, and the Royal Society for Arts, Manufacture & Commerce.

In 2008 he was awarded a Royal Academy of Engineering Silver Medal. He was named in The Times' "top 100 scientists" list for 2010, and 2 years later in 2012, he was awarded the Gold Medal of the Institution of Structural Engineers, their most prestigious award. Westbury is a judge for the Queen Elizabeth Prize for Engineering, a £1,000,000 biennial prize aimed at promoting the essential contribution of the profession around the globe.

Westbury was made a CBE in the 2013 New Year Honours.

References

Living people
Alumni of Jesus College, Cambridge
Commanders of the Order of the British Empire
Fellows of the Institution of Civil Engineers
Year of birth missing (living people)
Ecoult. Ecoult was an energy storage company based out of Australia.

Company history
Ecoult was originally formed in 2007 by the Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO). CSIRO invented the UltraBattery, a hybrid ultracapacitor and lead-acid battery technology, and formed a subsidiary company, Ecoult, to commercialize the technology.

In May 2010, East Penn Manufacturing acquired Ecoult from CSIRO, along with the global license to manufacture the UltraBattery (outside Japan and Thailand where Furukawa Battery holds the head license).

Ecoult was named in the Cleantech Group's 2013 Global Cleantech 100 in 2013.

In July 2020, East Penn Manufacturing announced that it was winding down its investment in Ecoult. In January 2021 the ecoult.com website announced that Ecoult has ceased operations.

References

External links
 Official Website of Ecoult

Companies based in Sydney
Electronics companies established in 2007
Energy storage
Electronics companies disestablished in 2021
2021 disestablishments in Australia
2010 mergers and acquisitions
2007 establishments in Australia
SymmetricDS. SymmetricDS is open source software for database and file synchronization with Multi-master replication, filtered synchronization, and transformation capabilities.  It is designed to scale for a large number of nodes, work across low-bandwidth connections, and withstand periods of network outage.  Data synchronization occurs asynchronously from a scheduled job, with data changes being sent over a push or pull operation.  It uses standard web protocols (HTTP) and database technologies (JDBC) in order to support a wide range of platforms and maximize its interoperability.  It includes support for Oracle, MySQL, MariaDB, PostgreSQL, Greenplum, SQL Server, SQL Server Azure, HSQLDB, H2, Derby, DB2, Firebird, Informix, Interbase, SQLite, Sybase ASE, Sybase ASA, MongoDB, Amazon_Redshift, and VoltDB databases.

Functionality
SymmetricDS runs either as a standalone server (using a built-in Jetty), within an application server (such as Apache Tomcat), or embedded into an application.  Configuration is done through properties files and a collection of configuration tables at a central node.  Both database tables and filesystems can be synchronized across a network of nodes.  Configuration allows for selection of tables, columns (vertical filtering), and subsets of rows (horizontal filtering) to synchronize in one direction or both directions.  Files are selected by base directory and whether to recurse into directories.  Wildcard characters are used to match multiple tables and files.  Tables can be grouped into channels that sync based on priority.  Groups of nodes are linked together and assigned a transport method of push or pull.  A push will connect to the node and send changes when they are ready, while a pull will periodically connect with a node to check if changes are available.  Several network topologies are possible by linking node groups, including fan-in/out, multi-master, star, and multi-tier tree.  A node can be prepared with an initial load of data to populate its database.  Changes are grouped into batches and assigned for delivery to nodes using Routers.  Routers can be configured or scripted to filter data and make decisions on which nodes should receive data.  Batches are delivered during synchronization and tracked using a sequence number and status, with periodic retries designed to automatically recover from errors.  Administration tools for command line and a web-based JMX console are included to manage nodes from a central location.  Programming interfaces for Java and REST are included to extend and customize behavior.

Prominent users
 OpenMRS - open source medical record system
 Openboxes - supply chain management software

See also
 Multi-master replication
 Comparison of file synchronization software
 Replication (computer science)

References

External links
 SymmetricDS community website
 SymmetricDS source code

Data synchronization
Idit Keidar. Idit Keidar () is a professor of electrical engineering and an author of more than 180 articles which gave her an h-index of 38 and were cited more than 5,000 times. Some of them were published in such journals as Journal of Parallel and Distributed Computing and SIAM Journal on Computing.

References

Living people
20th-century births
21st-century Israeli engineers
Academic staff of Technion – Israel Institute of Technology
Date of birth missing (living people)
Hebrew University of Jerusalem alumni
Israeli women engineers
21st-century women engineers
Year of birth missing (living people)
Israeli electrical engineers
21st-century Israeli women engineers
George H. Ludwig. George H. Ludwig was the former chief research scientist for the National Aeronautics and Space Administration's satellite systems and director of operations for the National Oceanic and Atmospheric Administration. He played a key role in adapting solid-state scientific research instruments for America's first satellites: Explorer I, II, and III. He wrote a book, and provided audio/oral history with the Transistor Museum.

Goddard Space Flight Center
Upon completing his doctorate in 1960, from the University of Iowa, Dr. Ludwig joined the Goddard Space Flight Center (GSFC) in Greenbelt, MD as chief of the new fields and particles instrumentation section. The Goddard Space Flight Center (GSFC) was established on May 1, 1959, as NASA's first space flight center and research laboratory. Its first 157 employees were transferred from the United States Navy's Project Vanguard, but continued their work at the Naval Research Laboratory in Washington, D.C., while the center was under construction.

Dr. Ludwig served as Project Scientist for NASA's Orbiting Geophysical Observatory 1, 3 and 5, nicknamed "Street-Car", which carried more than 60 instruments to conduct a wide variety of space science investigations.

NOAA
In 1972, Dr. Ludwig joined the National Oceanic and Atmospheric Administration, which was created in 1970. Over the next ten years working in Washington, D.C., and Boulder, Colorado, he directed the design, construction, and check-out of the Television Infrared Observation Satellite TIROS-N/NOAA polar-orbiting satellite system and many of the evolutionary improvements to the Geostationary Operational Environmental Satellite (GOES) system.

NASA
Dr. Ludwig returned to NASA as the Assistant Chief Scientist, NASA, Washington, D.C. He directed a critical examination of NASA space research data management. He retired in 1984.

Consulting and writing
Dr. Ludwig led efforts to define the data and information systems for the Global Change Research Program and early-Earth Observing System. In 2004, on James Van Allen Day, in celebration of Dr. Van Allen's 90th birthday celebration, Dr. Ludwig presented a lecture on his contributions with the Iowa Group in the 1950s. He finished the book, Opening Space Research; Dreams, Technology, and Scientific Discovery, published by American Geophysical Union, shortly before his death.

Death
George H. Ludwig, 85, died of prostate cancer January 22, 2013, at his home in Winchester, Virginia.

References

1927 births
2013 deaths
University of Iowa alumni
NASA people
Amax Vixen 105. The Amax Vixen 105 is an Australian homebuilt aircraft that was designed and produced by Amax Engineering of Donvale, Victoria. When it was available the aircraft was supplied as a kit for amateur construction.

Design and development
The Vixen 105 features a strut-braced high-wing, a two-seats-in-side-by-side configuration enclosed cabin with doors, fixed tricycle landing gear or optionally conventional landing gear and a single engine in tractor configuration.

The aircraft is made from composites. Its  span wing has optional flaps and a wing area of . The standard engine used is the  Subaru EA81 automotive conversion powerplant.

Optional equipment when the kit was supplied by the factory included wing flaps, long range fuel tanks, wheel pants and sprung steel main landing gear.

The Vixen 105 has an empty weight of  and a gross weight of , giving a useful load of . With full fuel of  the payload is .

The manufacturer estimates the construction time from the supplied kit as 300 hours.

Specifications (Vixen 105)

References

Vixen 105
1990s Australian sport aircraft
Single-engined tractor aircraft
High-wing aircraft
Homebuilt aircraft
Ephesite. Ephesite is a rare member of the mica silicate mineral group, phyllosilicate. It is restricted to quartz-free, alumina rich mineral assemblages and has been found in South African deposits in the Postmasburg district as well as Ephesus, Turkey.

Composition 
Ephesite has an ideal chemical formula of NaLiAl2(Al2Si2)O10(OH)2.  Ephesite and paragonite are closely related due to their substitution of sodium in place of potassium. The general form of most micas, which can vary such as in the place of ephesite, can be written as W(X,Y)2-3Z4O10(OH,F)2 as observed by many sources. In the case of ephesite the W compound is sodium and the (X,Y) is lithium and aluminium, it also bears two hydroxides as the end members.

Structure 
Ephesite, a mica structure, arises from the stacking of T-O-T layers along the c-axis direction connected by I-cations where T,O, and I stand for tetrahedral-, octahedral-, and interlayer. Creating long, flat sheets of sodium and lithium rich tetrehedra. Ephesite in particular belongs in the trioctahedral mica subgroup. Micas are determined and named for their end members and species that define a wide range of compositions. Depending on the interlayer cation, the micas are subdivided into true micas (if 50% I cations present are monovalent) or brittle micas ( if > 50% I cations present are divalent). Ephesite with monovalent cations of Na prove to be a true mica and with 2.5 octahedral cations are trioctahedral. Ephesite is classified as an uncommon true non-K mica of which only 2.1% of the micas are categorized.

Physical properties 
Ephesite found in its natural state is translucent and pink in color. It has a vitreous luster and pearly on the cleavages. Categorized as a triclinic crystal system and belongs with the point group 1 symmetry elements, this crystal class includes a one-fold rotation with or without inversion. As a group the micas are characterized by their perfect basal cleavage, giving thin, flexible, and elastic cleavage plates. Crystals are usually tabular with prominent basal planes and hexagonal in outline. Ephesite has been found as 2M1 and 1M polytype series and shows perfect cleavage on the {001} axis.

History 
The history of study of the mineral ephesite begins with its first appearance in Ephesus, Asia Minor at Gumach Dagh in a deposit also associated with emery discovered by J. Lawrence Smith in 1851. I. Lea in 1867 had discovered a mineral of the same composition which he had been calling under a different name, lesleyite. Later, ephesite was closely compared to a mineral margarite which shared the same composition as ephesite with a substituted Ca for Na. Many times ephesite will be referred to as a soda-margarite for this substitution of sodium. Because of these findings the names ephesite, lesleyite, soda-margarite and potash-margarite have been used synonymously.  Derivation of the name ephesite comes from its place of occurrence, Ephesus.

References 

Phyllosilicates
Triclinic minerals
Monoclinic minerals
Minerals in space group 1
Minerals in space group 15