omniomni/omni-engineering huggingface dataset:
Curtiss-Robertson Airplane Manufacturing Company. Curtiss-Robertson Airplane Manufacturing Company  was an American aircraft manufacturer formed to build the Curtiss Robin aircraft.

The company was founded on November 9, 1927, with a funding of $500,000. Initial production of its Curtiss Robin aircraft was at a factory in Garden City, Long Island. Production moved to St. Louis on August 7, 1928. On August 29, 1929, Curtiss had fully integrated Robertson into its business. In 1930, Travel Air was integrated into Curtiss-Robertson. In 1933, the company had fully merged with Curtiss-Wright with Robertson leaving.

Aircraft

References

Bibliography

Defunct aircraft manufacturers of the United States
Delta Pegass. 

The Delta Pegass is a Czech two-seat ultralight cabin monoplane designed and built by Delta System-Air.

Design
The Pegass is a strut-braced high-wing monoplane powered by either an  Rotax 912UL or a  Rotax 582UL engine driving a three-bladed tractor propeller. It has a fixed tricycle landing gear and a cabin with two seats side-by-side, a door on each side of the fuselage for access.

Specifications (Rotax 912UL)

References

Notes

Bibliography

1990s Czech and Czechoslovak civil utility aircraft
Homebuilt aircraft
Single-engined tractor aircraft
High-wing aircraft
Pegass
Seaflight Shearwater. The Seaflight Shearwater is a light amphibian aircraft, designed in the 1990s. A single example was built by Seaflight (NZ) and was for a time owned by Shearwater Aviation, who promoted the design.

History

The Shearwater Seaflight was designed by Bill Townson during the 1990s to fulfill a requirement for a four-seat amphibian. A series of 1/5th scale models were used to develop the design over a three-year period, with construction of a full-size machine beginning in 1997.

As ZK-SFA, the Shearwater was registered to Seaflight (NZ) Ltd of Warkworth, New Zealand and first flew in November 2001.

A second model, the Shearwater 201, was designed by Stephen Hoyle and Richard Roake. This was to be a next-generation 4 seat amphibian without the typical "boat hull" design amphibians use in an effort to reduce aerodynamic drag.

The aircraft subsequently changed hands and was re-registered several times, also appearing as ZK-TNZ owned by Shearwater Industries of Christchurch, then ZK-SFA again by Seaflight (NZ) and eventually to Shearwater Aircraft Ltd., based in Auckland. Shearwater Aircraft ceased trading in 2016, while the aircraft remains in private hands.

Design
The Shearwater is an amphibious light aeroplane of mainly fibreglass construction. Seating for four is provided in an enclosed cabin, above and behind which is mounted a pusher powerplant. To accommodate the propeller, the rear fuselage is cut down with an indented vee shaped upper profile, which blends smoothly into a V-tail. The planing hull is stabilised in the water by wingtip floats, while a wheeled undercarriage is hinged on either side of the hull and retracts upward and backwards into the wing root attachment fairings. A nosewheel retracts forwards.

The straight, mid-mounted wings attach to the hull behind the cabin and underneath the engine, and are removable for land transport. Downturned wingtips are faired into the stabilising floats on the Shearwater Seaflight along with the typical "boat hull" most amphibians use.

The Shearwater was originally powered by a PZL-developed variant of a 210 hp Franklin type.

Shearwater 201
The Shearwater 201 was proposed by Shearwater Aircraft as a next-generation kit, to become a certified aircraft at a later date. Differences between the 201 and the original model, or any amphibian, include the proposed use of a "hydroski" (a hydrofoil used to takeoff and land the aircraft in water) instead of a boat hull design. Engine options were to be either the Mistral G-300 Wankel type, mounted in pusher configuration, or a Price Induction Jet DGEN 390 jet engine. The kit was intended to have a construction time of 1000 man hours.

Specifications
Note: Engine and performance data may relate to the Shearwater 201.

References

Aircraft manufactured in New Zealand
Amphibious aircraft
Aircraft first flown in 2001
2000s New Zealand aircraft
Low-wing aircraft
Single-engined pusher aircraft
V-tail aircraft
Georg Rickhey. Georg Johannes Rickhey (25 August 1898, Hildesheim – 21 November 1970, Essen) was a German engineer and the general director of Mittelwerk GmbH in Dora-Mittelbau.

Rickhey, a doctor of engineering, joined the Nazi Party in October 1931 as member number 664,050. 
From 1940, he guided Gauamt Technik in Essen and was promoted in 1942 to the leader of NSDAP Gau Essen and was also at the same time authorized officer in an Essen mining company.

During the Second World War he held a number of positions with the Reichsministerium für Bewaffnung und Munition (Reich Ministry for Armament and Munitions) before becoming manager of Demag, a tank production company, in 1942.

He became head of Mittelwerk GmbH in Dora-Mittelbau from April 1944, overseeing production of the V-1 flying bomb and V-2 rocket. His work on these weapons saw him awarded the Knights Cross of the War Merit Cross along with Walter Dornberger and Wernher von Braun.

Arrested in 1945, he was taken by the U.S. Army to live at Wright-Patterson Air Force Base, Ohio where he worked under the terms of Operation Paperclip. While at Wright Field Rickhey helped establish a smuggling operation, based on knowledge of black markets that he had gained in Nazi Germany. He was subsequently indicted as part of the Dachau Trials of 1947 under accusations that he had worked closely with the SS and Gestapo and witnessed executions. According to fellow scientists in Paperclip, Rickhey had bragged about killing slave laborers at Mittelwerk. In one instance, Rickhey was accused of helping hang 12 prisoners from a crane, after the laborers were accused of sabotaging rocket production.

American Air Force colonel Donald L. Putt was aware of the allegations against Rickhey but sought to suppress them, since they were potentially damaging to Rickhey's ongoing research in the United States and to Operation Paperclip. At trial, Rickhey was acquitted due to a lack of evidence. Rickhey returned to Wright-Patterson Air Force Base after the trial ended. He did not return to his work in Operation Paperclip.

See also
Dora Trial

References

1898 births
1970 deaths
People from Hildesheim
German military engineers
Recipients of the Knights Cross of the War Merit Cross
People indicted for war crimes
People acquitted of international crimes
Mittelbau-Dora concentration camp personnel
Operation Paperclip
Engineers from Lower Saxony
V-weapons people

Nazi Party members
Prisoners and detainees of the United States military
SS Cretic. SS Cretic was an ocean liner built in 1902. She was operated by several shipping lines, all of which were part of the IMM Co., under several names in her career, which ended when she was scrapped in 1929.

Ship history
The steel-hulled ship was built by R & W Hawthorn, Leslie & Co. Ltd. of Hebburn for Frederick Leyland & Co. and launched on 25 February 1902 as Hanoverian. The 13,507-ton ship was 582 feet long, and 60 feet in the beam. She was powered by two 3-cylinder triple expansion steam engines, delivering 1,269 nhp to two screws.

In July 1902 she serves Leyland Line, for three voyages between Liverpool and Boston before the line's buyout by IMM Co. in October 1902.

Hanoverian was transferred to the Dominion Line and renamed Mayflower, entering service between Liverpool and Boston in April 1903. In November 1903 she was transferred again, this time to the Oceanic Steam Navigation Company's White Star Line, and was renamed Cretic. Initially remaining on the Liverpool-Boston route, in November 1904 she was transferred to routes between the Mediterranean and New York City, finally returning to the Liverpool-Boston route in 1910.

In 1917 she was taken over by the British government under their Liner Requisition Scheme to serve as a troopship in World War I. On 5 April 1918 Cretic, , and  sailed from Long Island City, New York, with the three battalions of the U.S. 308th Infantry Regiment aboard. On Cretic, the 2,032 men of the 2nd Battalion found that there was only accommodation for 1,500, so the troops were forced to eat and sleep in shifts until arriving at Liverpool on 19 April.

Cretic returned to commercial service in September 1919 on the White Star Line's Mediterranean service. In 1923 Cretic was transferred back to the Leyland Line, and renamed Devonian served on the Liverpool-Boston route until the end of her career in September 1928, apart from making three voyages under charter to the Red Star Line from Antwerp to New York in 1927-28. In 1929 she was broken up by P & W McLellan of Bo’ness, Scotland.

References

External links
 

1902 ships
Ocean liners
Passenger ships of the United Kingdom
Ships built on the River Tyne
Ships of the White Star Line
Steamships of the United Kingdom
Transmission curve. The transmission curve or transmission characteristic is the mathematical function or graph that describes the transmission fraction of an optical or electronic filter as a function of frequency or wavelength. It is an instance of a transfer function but, unlike the case of, for example, an amplifier, output never exceeds input (maximum transmission is 100%). The term is often used in commerce, science, and technology to characterise filters.

The term has also long been  used in fields such as geophysics and astronomy to characterise the properties of regions through which radiation passes, such as the ionosphere.

See also
 Electronic filter — examples of transmission characteristics of electronic filters

References

Signal processing
Ust-Luga Multimodal Complex. Ust-Luga Multimodal Complex (, Multimodalnyi kompleks Ust-Luga) is a project aimed at development of the portside area of about 3000 hectares located on the Soikinsky Peninsula by the Gulf of Finland in close proximity to the terminals of Ust-Luga Sea Merchant Port in Kingiseppsky District of Leningrad Oblast, Russia. The project developer is LLC "Multimodal complex Ust-Luga".

Proposed infrastructure
The development project of Ust-Luga Multimodal Complex envisages the following infrastructure: 
 an international cargo airport
 an industrial zone, a logistics zone, a temporary storage warehouses zone
 a business park
 a residential zone (intended for building)

Planning
Now OJSC "NIIP Gradostroitelstva" has completed the elaboration of an area planning scheme for Kingiseppsky district. This scheme determined the functional purpose of the project land. FSUE "RosNIPIUrbanistiki" completed  a Master Plan of the Vistinsky settlement. The Master Plan includes the location of Ust-Luga Multimodal Complex as well.
JSC "Lenaeroproject" made investigations and prepared a positive opinion on the technical possibility of constructing a cargo airport on the grounds of the Ust-Luga Multimodal Complex. The airport will be able to accommodate all types of cargo aircraft. Regulative bodies of the Leningrad region gave their approval to locate the cargo airport.

2024 drone attack 
On 21 January 2024 the Security Service of Ukraine conducted an overnight drone attack on the  gas terminal, causing a large fire, which took over a day to extinguish. Gas producer Novatek subsequently suspended all operations at the complex in response to the attack.

References

External links

2024 fires in Europe
2024 in Russia
Buildings and structures in Leningrad Oblast
January 2024 events in Russia
Ports and harbours of Russia
Ports and harbours of the Baltic Sea
Proposed buildings and structures in Russia
Proposed transport infrastructure in Russia
Transport in Leningrad Oblast
UNIVAC 9000 series. The UNIVAC 9000 series (9200, 9300, 9400, 9700) is a discontinued line of computers introduced by Sperry Rand in the mid-1960s to compete with the low end of the IBM System/360 series.  The 9200 and 9300 (which differ only in CPU speed) implement the same restricted 16-bit subset of the System/360 instruction set as the IBM 360/20, while the UNIVAC 9400 implements a subset of the full 32-bit System/360 instruction set. The 9400 was roughly equivalent to the IBM 360/30.

In 1972, UNIVAC stopped development of its 9000 series systems, in favor of hardware acquired from RCA, now called UNIVAC Series 90.

Hardware
The 9000 series uses monolithic integrated circuits for logic and plated-wire memory; the latter functions somewhat like core memory but uses a non-destructive read. Since the 9000 series was intended as direct competitors to IBM, they use 80-column cards and EBCDIC character encoding.

The family includes the 9200, 9300, 9400, and 9480 systems. The UNIVAC 9200 and 9300 were marketed as functional replacements for the UNIVAC 1004 and as direct competitors to the IBM 360/20. The printer-processor is one cabinet, the power supply and memory another and the card reader and optional card punch make an L-shaped configuration. Memory is 8 KB expandable to 32 KB. The 9200 II and 9300 II models, introduced in 1969, are extensions of the original 9200 and 9300 systems.

The printer differs from earlier UNIVAC printers, being similar to IBM's "bar printer" of the same era. It uses an oscillating-type bar instead of the drums that had been used until this point, and runs at speeds up to 300 lines per minute.

As Sperry moved into the 1970s, they expanded the 9000 family with the introduction of the 9700 system in 1971. The 9700 was said to be three to five as powerful as the 9400, twice as powerful as the IBM System/360 Model 50, and less costly than the IBM System/370 Model 145. A lower-cost replacement for the 9400, the 9480, was announced in 1973; it used MOS semiconductor memory rather than plated-wire memory.

Software
The 9200 and 9300 run the Minimum Operating System, previously known as NCOS - Non Concurrent Operating System. This system was loaded from cards, but thereafter also supported magnetic tape or magnetic disk for programs and data. The 9400 and 9480 run a real-memory operating system called OS/4. A new operating system for the 9700, called OS/7 was under development, but was discontinued in 1975.

References

External links 
 Operational Univac 9400 in the German computer history museum technikum29

UNIVAC mainframe computers
16-bit computers
32-bit computers
FET amplifier. A FET amplifier is an amplifier that uses one or more field-effect transistors (FETs). The most common type of FET amplifier is the MOSFET amplifier, which uses metal–oxide–semiconductor FETs (MOSFETs). The main advantage of a FET used for amplification is that it has very high input impedance and low output impedance.

In detail
The transconductance is given by

On rearranging, we get

Equivalent circuit
The internal resistance Rgs, between gate and source appears between drain and source. Rds is the internal resistance between the drain and source.
As Rgs is very high, it is taken to be infinite, and Rds is neglected.

Voltage gain
For ideal FET equivalent circuit, voltage gain is given by,

From the equivalent circuit,

and from the definition of transconductance,

we get

Types of FET amplifiers
There are three types of FET amplifiers, depending on which terminal is the common input and output. (This is similar to a bipolar junction transistor (BJT) amplifier.)

Common gate amplifier
The gate is common to both input and output.

Common source amplifier
The source is common to both input and output.

Common drain amplifier
The drain is common to both input and output. It is also known as a "source follower".

History

The basic principle of the field-effect transistor (FET) amplifier was first proposed by Austro-Hungarian physicist Julius Edgar Lilienfeld in 1925. However, his early FET concept was not a practical design. The FET concept was later also theorized by Oskar Heil in the 1930s and William Shockley in the 1940s, but there was no working practical FET built at the time.

MOSFET amplifier

In 1955, Carl Frosch and Lincoln Derrick accidentally grew a layer of silicon dioxide over the silicon wafer, for which they observed surface passivation effects. By 1957 Frosch and Derrick, using masking and predeposition, were able to manufacture silicon dioxide transistors and showed that silicon dioxide insulated, protected silicon wafers and prevented dopants from diffusing into the wafer. J.R. Ligenza and W.G. Spitzer studied the mechanism of thermally grown oxides and fabricated a high quality Si/SiO2 stack in 1960.

Following this research, Mohamed Atalla and Dawon Kahng proposed a silicon MOS transistor in 1959 and successfully demonstrated a working MOS device with their Bell Labs team in 1960. Their team included E. E. LaBate and E. I. Povilonis who fabricated the device; M. O. Thurston, L. A. D’Asaro, and J. R. Ligenza who developed the diffusion processes, and H. K. Gummel and R. Lindner who characterized the device.

See also
 Audio power amplifier
 LDMOS
 Power electronics
 Power semiconductor device
 Power MOSFET
 RF power amplifier

References

Transistor amplifiers
MOSFETs
Arab inventions
Austrian inventions
Egyptian inventions
Hungarian inventions
South Korean inventions
Albastar A1. The Albastar A1 is a Slovenian mid-wing, T-tailed, single-seat motor glider that was designed by Pavel Potočnik and produced by Albastar Ltd.

Design and development
The A1 is a self-launching glider, with the standard  Rotax 447 mounted in tractor configuration on a retractable pylon behind the cockpit. When retracted the engine is hidden behind two doors. The German importer of the glider equipped his aircraft with a Hirth engine instead of the Rotax powerplant.

The A1 is of mixed composite construction and is built from a combination of carbon-fiber-reinforced polymer, kevlar and PVC foam. The  span wing features winglets and produces a 40:1 glide ratio. The landing gear is a retractable monowheel gear. The price of the A1 in 2003 was €39,900.

Specifications (2003 model A1)

See also

References

2000s Slovenian sailplanes
Albastar Ltd aircraft
Activiti (software). Activiti is an open-source workflow engine written in Java that can execute business processes described in BPMN 2.0. Activiti is the foundation for Alfresco's Alfresco Process Services (APS) and Alfresco is the Activiti project's leading sponsor.

History 
In March 2010, Tom Baeyens and Joram Barrez, two key developers for jBPM left Red Hat and started Activiti as employees of Alfresco. Activiti is based on their workflow experience with jBPM, but is a new code base, not based on any previous jBPM code.

The first version of Activiti was 5.0, to indicate that product is the continuation of experience they gained via jBPM 1 through 4.

In October 2016, Barrez, Rademakers (author of Activiti in Action) and other contributors left Alfresco. The departing developers forked the Activiti code to start a new project called Flowable.

In February 2017, a new commercial version of Activiti was released and rebranded as Alfresco Process Services.

In May 2017, Activiti released version 6.0.0 with new support for ad hoc sub processes and a new application user interface.

Components 
The project is a suite of applications that work together:
 Modeler, a web-based graphical workflow authoring interface
 Designer, an Eclipse plug-in for developing workflows
 Engine, the core workflow processor
 Explorer, a web tool to deploy process definitions, start new process instances and carry-out work on workflows
 Cycle, a web app for collaboration between business users and software engineers

Alternative Modeling GUI 
The Yaoqiang BPMN Editor (FLOSS, GPLv3) can connect to the Activiti engine and thus can be used as a graphical workflow authoring interface, as an alternative to Activiti Modeler.

The DocuBrain Workflow Editor is a standalone BPMN 2.0 compliant workflow editor that can be used to create and edit generic BPMN processes. The editor supports direct connections to Activiti as well as all of Activiti's customization (such as Activiti specific element attributes, Activiti specific tasks like Camel Task, Mule Task, etc.).

References

External links 

Workflow applications
Java enterprise platform
Java (programming language) libraries
Cross-platform free software
Free software programmed in Java (programming language)
Free business software
Polymer Library. The Polymer Library, formerly Rapra Abstracts, is a searchable database of research on plastics, rubbers, polymeric composites, and adhesives. It includes abstracts from over 450 journals, as well as company literature, data sheets, and patents. The index covers end-use applications and commercial and legal implications, as well as basic research for academic and corporate scientists. The Library is aggregated by EBSCO, ProQuest, and STN.

Its literature coverage goes back to 1972. It was  originally published by RAPRA, formerly the Rubber and Plastics Research Association, and was published by Smithers Information Ltd. until June 2018. As off August 2018 the publication is continued by WTI-Frankfurt-digital GmbH i.G..

References

External links
 Polymer Library

Bibliographic databases and indexes
Commercial digital libraries
German digital libraries
N-Cyclohexyl-2-pyrrolidone. N-Cyclohexyl-2-pyrrolidone or CHP is a yellow to colorless liquid. It has a low vapor pressure, and is nearly odorless. It has a low solubility in water, but is soluble in a variety of organic solvents.

CHP is used in the electronics industry as a photoresist stripper (usually in combination with other solvents like N-methyl-2-pyrrolidone), and as a chemical polisher of copper in circuit board fabrication. It is also used in the textiles industry as a dye carrier in aramid fabrics.

References

Pyrrolidones
Jim Webb (audio engineer). Jim Webb is an American film audio engineer. He won an Academy Award for Best Sound and was nominated for another one in the same category.

Selected filmography
Webb won an Academy Award for Best Sound and was nominated for another:

Won
 All the President's Men (1976)

Nominated
 The Rose (1979)

Personal life

Webb graduated in 1962 from the Audio Engineering Society.

References

External links

Year of birth missing (living people)
Living people
American audio engineers
Best Sound BAFTA Award winners
Best Sound Mixing Academy Award winners
CAS Career Achievement Award honorees