omniomni/omni-engineering huggingface dataset:
Wag-Aero. The Wag-Aero Group is an American aircraft manufacturer that was founded by Dick and Bobbie Wagner in the 1960s and is based in Lyons, Wisconsin. The company specializes in the design and manufacture of kit aircraft and aircraft parts for amateur construction.

The company is owned by Bill Read and Mary Myers.

Divisions
The Wag-Aero Group of companies includes several aerospace divisions from acquisitions, including:
 Aero Fabricators
 Ground Support Manufacturing, Inc
 Leading Edge Air Foils
 Safe Air Repair
 Viking Aero

History
Wag-Aero was started by Dick and Bobbie Wagner in the 1960s and run from the basement of their home in Lyons, Wisconsin. In 1971 the company moved into permanent quarters and an aerodrome was constructed to accommodate fly-in customers, now known as Wag-Aero Airport (WI92).

The company formed a subsidiary, Aero Fabricators, in the 1970s to make welded and sheet metal aircraft parts, plus seat belts.

On 1 September 1995 the Wagners sold the group of companies to Bill Read and Mary Myers. In 1997 they purchased Viking Aero and in April 2002 acquired Ground Support Manufacturing, Inc. In 2005 they bought Safe Air Repair, a parts manufacturer. Ultralight parts supplier Leading Edge Air Foils (LEAF) was also added to the group.

Products
In addition to aircraft parts, the company supplies parts and kits to construct several light aircraft designs, all based on 1930s and 1940s Piper Aircraft models.

The Wag-Aero CUBy, a Piper J-3 replica, was designed by Dick Wagner and first flew on 12 March 1975. It is offered in several different models and variants including the Acro Trainer, Observer, Sport Trainer and Super Sport.

The Wag-Aero Wag-a-Bond was also designed by Dick Wagner as a Piper PA-17 Vagabond replica and first flew on 9 June 1978.

The Wag-Aero Sportsman 2+2, also known as the Wag-Aero CHUBy CUBy, was designed by Dick Wagner and Tom Iverson as a Piper PA-14 Family Cruiser replica and first flew on 8 May 1982.

Aircraft

References

External links

Aircraft manufacturers of the United States
Ultralight aircraft
Homebuilt aircraft
Companies based in Wisconsin
Walworth County, Wisconsin
Charles A. Spencer. Charles A. Spencer was an American scientific pioneer and inventor, who is widely believed to have developed the first American-made achromatic objective microscope. He was born in 1813 in Madison County, NY  and died in 1881.

Microscopy 
Spencer’s first microscopes were available for purchase in 1838. Previous to Spencer’s invention, European manufacturers held a monopoly on research-quality microscopic equipment. At least one of Spencer’s microscopes survives and is currently held by the Smithsonian Institution.

Business 
In 1854, Spencer formed a partnership with A.K. Eaton for the manufacture of high quality microscopes, which was located in Canastota, NY, USA. This partnership would prove successful, with back-orders from all over the world reportedly exceeding $20,000 US in the currency of the day.

A “crippling” fire in 1873 however, would lead to the failure and dissolution of this original partnership. Following a move to Geneva, NY, and a brief partnership with Geneva Optical Works, a new business was founded that included Spencer's sons in 1877 called “Charles A. Spencer & Sons.”

Honors and tributes 
Despite not seeking recognition for their work in the trade, in 1878 the Spencer's microscopes would receive the Paris Universal Exposition Exposition Universelle (1878) highest award, the Grand Gold Medal, for excellence in their optics.

In 1884, ground was broken in Rochester, NY for the foundation of a monument to Spencer and his peer, Robert B. Tolles to provide an enduring honor of their achievements in American microscopy, and the scientific advances that grew from it.

A memorial fund was also established as an endowment, which would grant "not more than $100" each year, to be used for research purposes by the recipient.

Legacy
In 1895, Herbert R. Spencer continued his father's work with the establishment of the Spencer Lens Company, based in Buffalo, NY. The company was later purchased by the American Optical Company. In 1967, Warner Lambert Pharmaceutical acquired the company  which, after changing hands several times, ultimately came to be known as Reichert Technologies, Inc. In 2011, the company became a part of AMETEK.

References

1813 births
1881 deaths
19th-century American inventors
Rutan SkiGull. The Rutan SkiGull is an amphibious aircraft designed by Burt Rutan.

Development
The SkiGull is a two-seat composite/titanium aircraft equipped with retractable ski undercarriage that can have wheels attached for water, snow or land operations, landing on around 400 feet of surface, but with a range to cross oceans. The engine is configured to operate with Swift Fuel, auto or boat fuel. The aircraft is being developed privately.

Public disclosure of the SkiGull design was made at the EAA's Airventure convention in 2015. Details included ability to operate in ocean waves with skis or land on smooth water or grass with skis retracted, 140 knot cruise speed (optionally 177 knots turbocharged), quiet flight, water takeoff in 460 feet, high wing with 47-foot span (foldable), ground transportation without a trailer, a single 44-percent-span Fowler flap behind the main propeller, and two electric motors with forward-folding reversible propellers to simplify docking and give optional takeoff power.

The SkiGull performed water tests in October 2015. It has two 12 hp electric motors for docking, but they can also fly the plane 8 miles without the piston engine. The plane can loiter for 35 hours. First flight tests in Coeur d'Alene, Idaho lasting 1.8 hours were successfully completed November 24, 2015. Tests included basic stability and control in cruise configuration and with flap down and skis extended. Rutan states that his goal for the aircraft is "something that we'll look back and say, 'what this airplane is and is able to do, in terms of operating in beaches, rough water, and have the kind of capabilities that it has, is not just something a little better than the best floatplane, but something that is really truly breakthrough in nature.'"

Ongoing work is addressing refinements such as stall characteristics and pitch attitude in water. Changes also include larger wheels functionally independent of the skis and no longer configured as a "tail dragger."

Specifications (SkiGull)

See also
Scaled Composites - Company founded by Rutan

References

External links
BurtRutan.com - Burt's SkiGull photos

Amphibious aircraft
2010s United States experimental aircraft
SkiGull
Aircraft first flown in 2015
Journal of Experiments in Fluid Mechanics. The Journal of Experiments in Fluid Mechanics is a bimonthly peer-reviewed scientific journal covering fluid dynamics. It was established  in 1987 and is published by the China Aerodynamics Research Society. The editor-in-chief is Jialing Le. The journal publishes articles in Chinese and English.

External links 
 
 

Fluid dynamics journals
Multilingual journals
Bimonthly journals
Academic journals published by learned and professional societies
Academic journals established in 1987
Gabriel Ajedra Aridru. Gabriel Gadison Ajedra Aridru is a Ugandan civil engineer and politician. He was the  State Minister of Finance for General Duties in  the Cabinet of Uganda, from 6 June 2016 until 3 May 2021. Prior to that, from 12 August 2012, until 6 June 2016, he served as the State Minister of Finance for Investments. In the cabinet reshuffle of 24 May 2013, and that of 1 March 2015, he retained his cabinet post. He also served as the elected member of parliament for Arua Municipality, Arua District, until May 2021.

Background and education
He was born in Arua District on 30 August 1962. He studied at Makerere University, graduating in 1989 with the degree of Bachelor of Science in Civil Engineering. He pursued further studies in Canada, obtaining the degree of Master of Science in Civil Engineering from the University of New Brunswick in 1992. In 1997, he was awarded the degree of Doctor of Philosophy in Civil Engineering.

Career
Following his postgraduate studies in Canada, he was appointed Lecturer in Civil Engineering at the University of Botswana. He later taught, as a lecturer in Civil Engineering at the Development University of Bahamas. Then he returned to Uganda and worked as an engineer for the National Water and Sewerage Corporation. For a period of time, he served as the Chief Project Coordinator and Advisor on Infrastructure for the Government of Botswana. In 2011, he successfully contested for the parliamentary seat of Arua Municipality, on the National Resistance Movement political party ticket. In August 2012, he was appointed State Minister of Finance, responsible for Investments. On 6 June 2016, he was named as State Minister for Investments.

Other considerations
Dr. Aridru was previously married to Josephine Aridru from Arua. He is a follower of the Anglican faith. He is now married to Elizabeth Kamuhanda of Kabale.

See also
 Parliament of Uganda
 Cabinet of Uganda
 Government of Uganda

References

External links
 Website of the Parliament of Uganda
 Full List of Cabinet Ministers May 2011

1962 births
Living people
Lugbara people
People educated at St. Joseph's College Ombaci
Ugandan civil engineers
People from West Nile sub-region
People from Northern Region, Uganda
Academic staff of the University of Botswana
People educated at Namilyango College
Members of the 9th Parliament of Uganda
People from Arua District
University of New Brunswick alumni
Government ministers of Uganda
National Resistance Movement politicians
Makerere University alumni
Members of the 10th Parliament of Uganda
Selex RAN-40L. Selex RAN-40L is a naval 3D L band search radar developed by Leonardo. The radar is used for long range maritime air surveillance and early warning. The radar uses a fully solid state active phased array antenna and capable of tracking and detecting air targets like aircraft or drones up to 400 km away. RAN-40L is based on existing land based 3D RAT-31DL radar which is a system widely used by NATO Countries for long air surveillance.

The radar functions include Track While Scan for air and surface long-range surveillance and missile tracking . Radar coverage is obtained by phase scanning in elevation, while mechanically rotating in azimuth. The antenna rotates at 6rpm or 12rpm, with 360° azimuth coverage.

Operators 

 INS Vikrant Aircraft Carrier

 Italian aircraft carrier Cavour
 Durand de la Penne-class destroyers

See also 
Selex RAT-31DL
SMART-L
AN/SPY-3
AN/SPY-6
OPS-24
OPS-50
Type 346 Radar
Phased array
Active electronically scanned array
Active phased array radar

References 

Military radars of Italy
Naval radars
Military equipment of Italy
Lutz Michael Wegner. Lutz Michael Wegner (born October 11, 1949) is a German computer scientist.

Biography
Wegner was born in Weinsberg near Heilbronn, Germany, in 1949. He graduated from Williston Academy in Easthampton, Mass. in 1968 and from Theodor-Heuss-Gymnasium in Heilbronn in 1969. From 1969 to 1974 he studied industrial engineering at the University of Karlsruhe finishing with an MBA to be followed by two years as a visiting Ph.D. student at the Department of Computer Science of the University of British Columbia in Vancouver, B.C., Canada. His thesis titled "Analysis of two-level grammars" was submitted and defended in Karlsruhe in 1977 with Hermann Maurer and Thomas Ottmann being the referees. In 1982 he received the venia legendi in applied computer science from the University of Karlsruhe with an inaugural dissertation (Habilitationsschrift) on Quicksort variants for multisets. Examiners were Thomas Ottmann, Wolfgang Janko and Jan van Leeuwen (Utrecht).

In 1984 he was appointed professor at the Hochschule Fulda (Fulda University of Applied Sciences) and went from there in 1987 to the University of Kassel where he served as full professor and chairman of the database group since 1989 until his retirement in March 2015.

Lutz Wegner is divorced and has three children.

Achievements

Lutz Wegner started his career with fundamental research on two-level grammars, also known as 
van Wijngaarden grammars which had been used to define the programming language Algol68.
His results were included in the Handbook of Formal Languages by Arto Salomaa and Grzegorz Rozenberg.
For his second thesis he developed variants of Quicksort suitable for multiset and proved that they 
achieved the lower bound for quicksort algorithms previously given by Robert Sedgewick. 
Following a sabbatical stay at the IBM Scientific Center Heidelberg he took an interest in the Non-First Normal-Form data model, also known as nested relational model, and designed a graphical editor which also served as base for 
research on synchronous groupware. In 1986 he authored an E-learning course "Introduction to Unix", which 
originally was a contribution to Hermann Maurer's COSTOC-Project, and with 
several portings was in active use until 2015, thus constituting one of the longest running examples  
of courseware.

Besides his scientific achievements Wegner was instrumental in introducing computer science studies 
(Bachelor and Master) at the University of Kassel which started in 2001 after securing three additional, 
sponsored professorships with Traudl Herrhausen, then a member of the Hessian Parliament, opening doors to 
industry and charities.

Notable publications
 Lutz M. Wegner: On Parsing Two-level Grammars Acta Informatica 14 (1980) pp. 175–193 
 Lutz M. Wegner: Quicksort for Equal Keys. IEEE Trans. Comput. 34:4 (1985) pp. 362–366 .
 Jukka Teuhola and Lutz Wegner: Minimal Space, Average Linear Time Duplicate Deletion. Comm. ACM 34:3 (1991) pp. 62–73 .

See also
Two-level grammars 
Quicksort

References

Living people
Academic staff of the University of Kassel
German computer scientists
1949 births
Next Generation Missile Vessels. Next Generation Missile Vessels (NGMVs) are a planned class of anti-surface warfare corvettes for the Indian Navy. Under this programme the Indian Navy intends to acquire six advanced missile vessels. Ships in this class will be armed with Anti-ship missile or Land-attack missile like BrahMos. Ships under this class will feature advanced stealth features like a low radar cross section (RCS), infrared, acoustic and magnetic signatures.

Development 
On 2 January 2015 the Ministry of Defence (MOD) issued a Request For Information (RFI) under Buy Indian and Make Indian category for six new missile corvettes by initiating the Next Generation Missile Vessels (NGMVs) programme. Vendors who chose to respond to the RFI must meet "minimum qualifying criteria" mainly, shipyard should have already built "vessel(s) of similar specifications". An RfP worth $2.2 billion was filed by the Government of India to various Indian shipyards seeking for various warships including six missile boats.

On 23 February 2021, Cochin Shipyard (CSL) won the bid to construct 6 Next Generation Missile Vessels (NGMV) for a cost ₹10,000 crores.

On 30 March 2023, MoD signed the contract for acquisition of six NGMV with CSL at a cost of . The delivery of ships is scheduled to commence from March 2027. According to MoD, the construction of these ships will generate an employment of 45 lakh man-days over a period of nine years.

On 15 September 2023, Bharat Electronics Limited announced that they have received an order worth  from CSL to supply "state-of-the-art technology" including sensors and weapons equipment for the NGMV project.

On 29 March 2024, CSL signed another deal with Hindustan Aeronautics Limited worth  for in-house manufacturing six units of LM2500 for NGMV, which are scheduled to be delivered between 2026 and 2029.

On 16 December 2024, the steel cutting ceremony for the first ship of NGMV held at the Cochin Shipyard. Induction of the vessels is to start from 2027.

Design and description 
The RFI suggests that ships will be about 2,200-2,800 tonnes each. The new ships will have a complement of 11 officers, 2 trainee officers and 80 sailors. The range will be at least  ( at full speed) and speed performance will be  (max speed of ). The ships will carry eight surface-to-surface missiles, a full-fledged surface-to-air missile (SAM) system with point defence capabilities and a  range MR gun system. The ships will also have radar and electro-optically (EO) guided close-in weapon systems (CIWS) with 360-degree anti-missile defence.

Ships of the class

See also 
 Project 75I-class submarine
 
 Indian Navy Multi-Role Support Vessel programme
 Future of the Indian Navy

References 

Naval ships of India
Ships built in India
Light Miniature Aircraft. Light Miniature Aircraft was an American aircraft manufacturer based in Okeechobee, Florida. The company specialized in the design of ultralight aircraft and supplied plans for amateur construction.

The company seems to have gone out of business about 2010, but Wicks Aircraft continues to provide kits for the designs.

Products
The company's LM-1, 2 and 3 family of aircraft were designed in the mid-1980s during the initial ultralight boom. At the time many pilots did not find the typical early "flying lawnchair" ultralights confidence inspiring or appealing. The company's designs were intended to fit the same FAR Part 103 rules, including its  empty weight, but provide aircraft that look and fly like a traditional light aircraft. However, many of the designs result in completed aircraft that are heavier than the US ultralight rule empty weight limit.
 
The LM-1 family of designs are built from wood, or optionally 4130 steel tube and finished with doped aircraft fabric covering. The completion involves minor changes in the cowling, window and tail shapes to make them resemble well-known light aircraft designs. The first in the series, the LM-1 is a single seat 75-85% scale replica of a Piper J-3 Cub and was first flown in 1985. The LM-2 is a single or two seat 75% scale replica of a Taylorcraft B, while the LM-3 is a single seat 75% scale replica of an Aeronca Champ. The follow-on Light Miniature Aircraft LM-5 is a full-sized tandem two-seat replica of the Piper PA-18 Super Cub.

The LM-J3-W is a full-sized two-seat J-3 Cub replica, while the LM-TC-W is a full-sized two-seats in side-by-side configuration Taylorcraft replica, both rendered in wood and fabric.

Aircraft

References

External links
 - previous location
Company website archives on Archive.org

 
Defunct aircraft manufacturers of the United States
Ultralight aircraft
Homebuilt aircraft
Ben Munk. Benedikt Aage Munk (December 3, 1929 – March 13, 2009) was professor of electrical engineering at the ElectroScience Laboratory (ESL) at Ohio State University (OSU), Columbus, Ohio, US.

Munk is best known for his contributions to the field of applied electromagnetic, especially periodic surfaces (also known as metasurfaces) and antenna arrays. He is the author of many papers on periodic surfaces and antennas, as well as two key books. The most significant work are the "Finite Antenna Arrays and FSS" in which he discusses the design of the ultra wide band tightly coupled dipole antenna array and "Frequency Selective Surfaces: Theory and Design". Unlike other antenna books that heavily emphasize theory and mathematics, Munk's approach is based on intuitive understanding and engineering aspects of the subjects. He had contributed two chapters to the third edition of John Kraus' classic book, "Antennas for All Applications", published in 2002. His last book publication is named "Metamaterials: Critique and Alternatives" which was published in 2009 by Wiley. In this books he argues against negative permittivity/permeability meta-materials and cloaking.

According to his own words and Vita published alongside his dissertation, Munk graduated from a high school in Denmark in 1948. Afterwards he studied Electrical Engineering at the Technical University of Denmark also known as The Polytechnic Institute of Denmark and obtained master's degree in 1954. From 1954 to 1957 he as s with the Royal Danish Navy as a Lieutenant and antenna/radar engineer. He was an assistant group leader at Rohde and Schwarz in Munich, Germany developing antennas (1957–59). Munk was a chief designer for A/S Nordisk Antenne Fabrik, Denmark and worked with antennas, centralized antenna systems, and filters from 1959-60. From 1960 to 1963, he was a research and development engineer with the Andrew Corporation, Chicago, Illinois, working with antennas. Later on, from 1963–64, he was an antenna researcher with Rockwell International in Columbus, Ohio working on antenna feeds, circular apertures, and anomalies. He was a PhD student in electrical engineering at the Ohio State University (OSU) from 1964-1968. His Ph.D. advisor was Prof. Robert G. Kouyoumjian who was a pioneer in the area of Uniform Theory of Diffraction (UTD). His project supervisor was Prof. Leon Peters Jr. Munk's Ph.D. dissertation is titled "Scattering by Periodic Arrays of Loaded Elements". After receiving his Ph.D., he joined the faculty at the Ohio State University and ElectroScience Laboratory, where he was a professor and later, professor emeritus, until he died. Prof. Munk was became an IEEE Fellow in 1989. Munk served as National Distinguished Lecturer for Antennas and Propgation Society (APS) from 1982 to 1985.

Munk died on Friday, March 13, 2009, at Arlington Court Nursing Home, Columbus, Ohio. He was 79.

References

1929 births
2009 deaths
American electrical engineers
Ohio State University College of Engineering alumni
Ohio State University faculty
20th-century American engineers
Microwave engineers
Helen Donis-Keller. Helen Donis-Keller is the Michael E. Moody Professor and Professor of Biology and Art at Olin College of Engineering in Needham, Massachusetts.

Education and career 
Donis-Keller has a B.Sc. and an H.B.Sc. from Lakehead University. She earned her Ph.D. at Harvard University under the direction of Walter Gilbert in 1979. After employment at the biotechnology companies Biogen and Collaborative Research, she joined the faculty at Washington University School of Medicine. In 2001, she earn an MFA in studio art from the School of the Museum of Fine Arts in Boston and Tufts University and she joined the faculty at the Olin College of Engineering. In 2012, she was named the Michael. E. Moody Faculty Chair.

Research 
Donis-Keller's graduate research established a method to do RNA sequencing. During her time at Collaborative Research, her research group created the first genetic map of the human genome. Donis-Keller was unable to secure either NIH or venture funding for generating the RFLP map, but convinced Collaborative Research's management to fund the project. She continued to work on the genetic linkage map and led research into understanding the genetic basis of cystic fibrosis, thyroid cancer, and breast cancer.

Selected publications

Awards 
Doctor of Science Degree (Honoris Causa) from Lakehead University (1995)

Art 
In addition to teaching art at Olin, Donis-Keller is herself an artist, and her art can be seen at Needham's 2021 Open Studios event and other venues. Her Ph.D. advisor, Walter Gilbert, has also begun to investigate the intersection between art and science though, in a 2015 interview, Donis-Keller did not recall his interest in art while she was a student in his lab.

References

External links 
 

Year of birth missing (living people)
American geneticists
Harvard University alumni
Olin College faculty
Washington University School of Medicine faculty
Lakehead University alumni
American women artists
American women geneticists
Living people
Seminole (YT-805). Seminole (YT‑805) is a United States Navy .

Construction

The contract for Seminole was awarded 25 March 2008. She was laid down by J.M. Martinac Shipbuilding Corp., Tacoma, Washington and launched 6 November 2010.

Operational history

Seminole was delivered to the Navy 8 April 2011 at Yokosuka by the US-flagged heavy-lift ship BBC Houston. Seminole is assigned to Commander Fleet Activities Yokosuka.

References

 
 

Valiant-class tugboats
Ships built in Tacoma, Washington
2010 ships