omniomni/omni-engineering huggingface dataset:
Execute Channel Program in Real Storage. In IBM mainframe operating systems, Execute Channel Program in Real Storage (EXCPVR) is a macro generating a system call, implemented as a Supervisor Call instruction, for low-level device access, where the programmer is responsible for providing a list of device-specific CCWs, that is, a channel program, to be executed by I/O channels, control units and devices. Additionally, the programmer is expected and required to ensure that the input/output data areas are in real storage and are "fixed", either prior to invoking EXCPVR or via the page fix appendage. EXCPVR can in some situations provide improved performance compared to EXCP.

Relationship to Execute Channel Program (EXCP)
EXCPVR may be viewed, historically, as a V=R (i.e., Virtual=Real) version of EXCP. However, EXCPVR is not restricted to V=R applications. Indeed, EXCPVR may refer to non-V=R data areas provided such data areas are "fixed" and the channel command words which reference such data areas have been translated from virtual to real addresses by the programmer using the LRA [ Load Real Address ] privileged instruction, as the data channels deal only with real addresses,not virtual addresses. EXCPVR was first introduced in SVS and was continued in MVS/370.

Support for Format 1 CCWs
In the later instances of the OS, support was added for Format 1 CCWs, and, hence, for access to data areas which are "above the line" (Format 0 CCWs may only access data areas which are "below the line").

Relationship to supervisor
EXCPVR's front-end is always in TCB mode as EXCPVR is a Type 1 SVC. In MVS/370 and subsequent instances of the OS, EXCPVR invokes STARTIO to schedule execution of the channel program, hence EXCPVR's back-end is always in SRB mode, but the back-end contains emulation code which allows the appendages developed for earlier, pre-MVS instances of the OS to function largely as before and thereby to appear to be in TCB mode, for which these appendages were originally designed. This distinction can complicate conversion of certain "roll-your-own" access methods and applications to MVS.

Notes

References

IBM mainframe operating systems
System calls
Kern & Sohn. Kern & Sohn is a German manufacturer and distributor of precision scales force gauges and microscopes. It was founded in 1844 in Albstadt, Ebingen by Gottlieb Kern and its products are often referenced in nineteenth century international scientific publications.

The business is currently run by the sixth generation of the Kern family, and is one of only two German companies from that period to remain family-owned throughout its history (along with Bizerba). Many of the scales and balances produced by Kern are exhibited at the Waagenmuseum in Balingen. It has 100 employees.

History 
Gottlieb Kern belonged to a family of European artists and stonemasons. Kern & Sohn started in the midst of a recession but by 1867, the company was producing and selling around 2,000 balances a year to scientists, apothecaries, chemists and goldsmiths. In 1870, Albert Sauter, the step-son of Kern, joined the Kern & Sohn Board of Directors.

During the last quarter of the nineteenth century, Kern & Sohn introduced innovations and modifications into their designs to increase accuracy. In 1886, Gottlieb Kern died and Sauter became President of the company. The period was marked with expansion and technological development. By the turn of the century, Kern & Sohn held a dominant market position in a number of weight measurement fields. In 1903, Albert Sauter's son Gustav took over the company.

Products 
Kern & Sohn deals in a variety of scale products, including scales (both industrial and medical), laboratory balances, software, stroboscopes, length, force and torque measurement, coating thickness and material thickness.

Distributors 
Kern sells directly to end-users of precision scales and force gauges as well as distributors throughout the world.

References 

Manufacturing companies of Germany
Functional logic programming. Functional logic programming is the combination, in a single programming language, of the paradigms of functional programming and logic programming. This style of programming is embodied by various programming languages, including Curry and Mercury. A more recent example is Verse.
A journal devoted to the integration of functional and logic programming was published by MIT Press and the European Association for Programming Languages and Systems between 1995 and 2008.

References

External links
 Functional logic programming at U. Kiel
 "func" library for SWI-Prolog

Functional programming
Logic programming
Programming paradigms
Slingsby Kestrel. The Slingsby T.59 Kestrel is a British Open class glider which first flew in August 1970. Of fibreglass construction, it features camber-changing flaps, airbrakes, and a retractable main wheel.

Originally a licensed-built version of the Glasflügel 401, the Kestrel was produced in several variants culminating in the T.59H of  wing span. The type was successful when used in gliding competitions and was the first glider to complete a  pre-declared task.

Notable competition use
1970 World Championships - Fourth place, pilot; George Burton.
1972 British National Championships - First place, pilot; John Delafield.
1972 World Championships - Eight Kestrels entered, highest competitors placed fourth (Nick Goodhart) and sixth (Burton).
1975 British National Championships - First place, pilot; George Lee. Eight of the top ten places were taken by Kestrel pilots.

World record use
The 1,000 km out and return pre-declared task world distance record was broken in September 1972 by New Zealander, Dick Georgeson. Covering a distance of  in lee wave this was the first time that this pre-declared distance task had been completed.

Variants
T.59 Kestrel 17
Initial licensed production version of Glasflügel 401, first flown in 1970, five built.
T.59B
Experimental  wing span version, one built.
T.59C Kestrel 19
Prototype with carbon fibre wing spar, first flown in May 1971. One aircraft built.
T.59D/E Kestrel 19
Production Kestrel 19, T.59D was a designation given by the British Gliding Association, T.59E was the designation given to the same type by the Civil Aviation Authority. Over 90 aircraft built.
T.59G Kestrel 22
Wing root extensions fitted to increase span to , tailplane area enlarged by 25%. One aircraft modified in Australia.
T.59H Kestrel 22
Re-designed four-piece wing. Two aircraft built.

Aircraft on display
US Southwest Soaring Museum

Specifications (T.59D Kestrel 19)

See also

References

Notes

Bibliography

 Coates, Andrew. Jane's World Sailplanes and Motorgliders. London. Macdonald and Jane's Publishers Ltd., 1978. 
 Simons, Martin. Slingsby Sailplanes, Shrewsbury, England: Airlife Publishing Ltd. 1996.

External links

 British Gliding Association data sheet - Kestrel 22

1970s British sailplanes
Glider aircraft
Kestrel
Aircraft first flown in 1970
Mid-wing aircraft
T-tail aircraft
EgoNet. EgoNet (Egocentric Network Study Software) is a program for the collection and analysis of egocentric social network data. It helps the user to collect and analyse all the egocentric network data (all social network data of a website on the Internet), and provide general global network measures and data matrixes that can be used for further analysis by other software. The egonet is the result of the links that it gives and receives certain address on the Internet, and EgoNet is dedicated to collecting information about them and present it in a way useful to the users.

Egonet is written in Java, so that the computer where it is going to be used must have the JRE installed. EgoNet is open source software, licensed under GPL.

Egonet was created by Christopher McCarty, a professor at the University of Florida, United States.

Features 
The program allows to create questionnaires, collect data and provide comprehensive measures and arrays of data that can be used for subsequent analysis by other software.
Its main benefits are the generation of questionnaires for relational data, the calculation of relevant General measurements for the analysis of social networks and production graphs.

Components 
Egonet is composed of the following modules:

 EgoNetW, that allows to create formats of questionnaires for the pursuit of studies;
 EgoNetClientW: used for data load - once defined the relevant questions and the structure of the questionnaires.

See also 

 Graphviz
 GraphStream
 graph-tool
 JUNG
 NetworkX
 Tulip

References

External links 
 

Social networking services
Data analysis software
Free software programmed in Java (programming language)
Free science software
USS Challenger. USS Challenger was a U.S. freighter. It was commissioned by the U.S. Navy between 1918 and 1919 for service during World War I.
It was built in 1918 by Union Iron Works, San Francisco, Calif., under a United States Shipping Board contract. The US Navy accepted delivery on 4 October 1918 and it was commissioned the same day. He then reported to the Naval Overseas Transportation Service.

Challenger cleared San Francisco 9 October 1918 for Mejillones and Antofagasta, Chile, where it loaded nitrates. Sailing on to deliver its cargo at Pensacola, Fla., 11 December, Challenger was next ordered to New Orleans to load cotton and steel for the French government. He was transferred to J. H. W. Steele Co. for operation. After a voyage in January and February 1919 carrying cargo to France to supply the Army of Occupation, Challenger returned to Baltimore, Md. It was decommissioned there 2 May 1919, and returned to the United States Shipping Board the same day.

On 17 May 1942 while serving with American-South African Line during World War II, it was torpedoed and sunk by the German submarine U-155.

References

Cargo ships of the United States Navy
Auxiliary ships of the United States Navy
Ships sunk by German submarines in World War II
1918 ships
World War II merchant ships of the United States
Maritime incidents in May 1942
Lamina emergent mechanism. Lamina Emergent Mechanisms (also known as LEMs) are more commonly referred to as "Pop-up Mechanisms" as seen in "pop-up-books". LEM is the technical term of such mechanisms or engineering. LEMs are a subset of compliant mechanisms fabricated from planar materials (lamina) and have motion emerging from the fabrication plane. LEMs use compliance, or the deflection of flexible members to achieve motion.

Background 
Ortho-Planar Mechanisms are an earlier concept similar to LEMs. More well known LEMs include pop-up books, flat-folding origami mechanisms, origami stents, and deployable mechanisms. The research in LEMs also overlaps with deployable structures, origami, kirigami, compliant mechanisms, microelectromechanical systems, packaging engineering, robotics, paper engineering, developable mechanisms, and more.

References

External links 
Compliant Mechanism Research Group at BYU
 Motion Structure research at Oxford
 Rigid Origami Structure research by Tomohiro Tachi
 Metamorphic Mechanism research at King's College London
 Robotic Origami Folding research at Carnegie Mellon

Mechanisms (engineering)
Robotics hardware
Paper folding
Reaction bonded silicon carbide. Reaction bonded silicon carbide, also known as siliconized silicon carbide or SiSiC, is a type of silicon carbide that is manufactured by a chemical reaction between porous carbon or graphite with molten silicon. Due to the left over traces of silicon, reaction bonded silicon carbide is often referred to as siliconized silicon carbide, or its abbreviation SiSiC.

If bulk silicon carbide is produced by sintering of silicon carbide powder, it usually contains traces of chemicals called sintering aids, which are added to support the sintering process by allowing lower sintering temperatures. This type of silicon carbide is often referred to as sintered silicon carbide, or abbreviated to SSiC.

The silicon carbide powder is gained from silicon carbide produced as described in the article silicon carbide.

References

Ceramic materials
Inorganic silicon compounds
Materials science
Chemical engineering
Building Services Engineering Research and Technology. Building Services Engineering Research and Technology is a bimonthly peer-reviewed scientific journal that covers the field of building services engineering. The journal was established in 1980 and is published by SAGE Publishing on behalf of the Chartered Institution of Building Services Engineers.

Abstracting and indexing
The journal is abstracted and indexed in Scopus and the Science Citation Index Expanded. According to the Journal Citation Reports, its 2021 impact factor is 2.473.

References

External links

Bimonthly journals
SAGE Publishing academic journals
English-language journals
Engineering journals
Academic journals established in 1980
Journal of Cellular Plastics. The Journal of Cellular Plastics is a bimonthly peer-reviewed scientific journal that covers the field of polymer science and foamed plastics technology. The journal was established in 1965 and is published by SAGE Publications. it was established in 1965 and the editors-in-chief are Chul B. Park (University of Toronto).

Abstracting and indexing 
The journal is abstracted and indexed in:

According to the Journal Citation Reports, the journal has a 2020 impact factor of 3.073.

References

External links
 

SAGE Publishing academic journals
Bimonthly journals
English-language journals
Academic journals established in 1965
Materials science journals
Eca Sindel. ECA-Sindel was an Italian company operating worldwide in the designing, manufacturing, installation, and maintenance of professional tactical and operational naval simulators. ECA -Sindel also produced integrated systems for training purposes in joint warfare operations by land, sea and air, called "Joint Warfare Simulators".

Name
The choice of the name Sindel was made in reference to an illustrious predecessor in the history of Italian technology. The first company to bear the name was a society founded in 1956 by a group of former engineers of Microlambda who were among the pioneers in the development of radar technology in post-war Italy. (This original Sindel would eventually merge with Microlambda in 1960 to form Selenia)

History
Founded in 1982, Sindel began its activities developing simulation systems for the training of radar operators creating electronic equipment that could simulate a real nautical environment.
The Company has placed itself from the earliest years in a niche of the simulator market, which was then characterized by large companies that manufactured optical-mechanical systems run by large and expensive mainframes; Sindel products, however, were based on specific software installed on standard commercial computers. These simulators are better suited to nautical schools, and other institutions with smaller budget than larger organizations like military academies, or radar institutes.
Since the beginning the company has collaborated with the Guglielmo Marconi Radar Institute of Genoa which has provided Sindel of the essential know-how, to develop a valid training system for radar operators. The functionality of that system has gradually evolved to ensure the adequate stimulation of radars with ARPA capability, depth sounders and government systems such as the rudder and the engine-room telegraph.
Over the years, following the evolution of real systems installed on board, naval simulators have become rich, complex systems with many components such as ECDIS electronic navigational charts, AIS navigation radio helpers, and GMDSS communications systems.
From 2002 to 2006 the company developed the ASWTT, an integrated anti-submarine combat simulator for the South Korean Navy.
In 2006 the Sindel brand was acquired by the ECA SA group of Toulon, along with some Italian private investors, and since then operates under the extended name of ECA Sindel. The acquisition by the ECA group, active in the marine robotics field, has expanded the application areas of the simulation systems, including now simulators for underwater robots such ROV and AUV, and logical guidance for radio-controlled surface crafts (USV, Unmanned Surface Vehicle).
The company went out of business in 2018.

See also

 Serious game
 Military exercise
 Military simulation
 List of Italian Companies

Notes

External links 
 Jane’s Simulation and Training
 Naval technology 
 Maritime index
 ASWTT
 MAST fair
 Related videos 
 Hong Kong Marine Department Training Centre 

Military simulation
Defence companies of Italy
Electronics companies of Italy
Companies established in 1982
Italian companies established in 1982
Italian brands
De Noord. (meaning 'the North') is a windmill located on the Noordvest 38 in Schiedam, Netherlands. It is the tallest windmill in the world with a roof height of  and a wing span of . The mill is one of the five remaining windmills in Schiedam, and has been a national monument (number 32716) since 29 May 1969. Today  houses a restaurant.

History 
Before the current windmill was built in 1803 as a gristmill, a wooden post mill was built in this location around 1400. In 1707, the wooden post mill was torn down and replaced with a stone mill. When this became too small,  was built. In 1930, a diesel engine was added inside the windmill to keep production going when there was no wind. The engine is currently at the 's-Gravelandseweg in Schiedam. In the 1930s, usage of wind energy became less common, leading to the dismantling of  in 1937. The beams, capstan wheel, cap, sail-cross and railings were all removed at that time.

During World War II, the stump that remained of  was used as a watch post by the Germans. After the war, the Schiedam municipality bought the mill with the intention to restore it to grind again. The first phase of restoration began in 1962, restoring the sail-cross, cap, tie beams, railing and capstan wheel. Roughly ten years later, the windmill was functioning again.

Today,  is a restaurant and bar serving a wide range of food and drinks.

See also 
 List of windmills in Schiedam
 De Noord (Rotterdam), a similarly named windmill in Rotterdam which was demolished in 1954
 Fuhrländer Wind Turbine Laasow, tallest wind turbine in the world

References 

Windmills in South Holland
Rijksmonuments in South Holland
Tower mills in the Netherlands
Grinding mills in the Netherlands
Windmills completed in 1803
Buildings and structures in Schiedam
Micathermic heater. A micathermic heater is a type of space heater in which the heating element is covered in thin sheets of mica. Micathermic heaters produce both convection heat and radiant heat, and are usually thinner than other types of heaters.

Risks 
The 1500 watt SoleusAir 360 Micathermic Heater was recalled in 2008 due to it being a fire hazard.

References

Heating, ventilation, and air conditioning
Residential heating appliances
Heaters
Silliman University College of Engineering and Design. The Silliman University College of Engineering and Design is one of the constituent colleges of Silliman University, a private research university in Dumaguete, Philippines. The college started as the Department of Engineering in 1932, then offering a single course in Civil Engineering. By the time Silliman acquired university status, Silliman proceeded to provide additional undergraduate programs.  At present, the college provides undergraduate courses in Civil Engineering, Mechanical Engineering, Electrical Engineering, Computer Engineering, and Architecture.  It is currently housed in three buildings, referred to as the Engineering Complex composed of Calderon Hall, Uytengsu Hall, and Batchelor Hall.

References

External links
Silliman University official website

Engineering and Design
Engineering universities and colleges in the Philippines
Wezel Apis 2. The Wezel Apis 2 is a German mid-wing, T-tailed, single-seat motor glider that was designed and produced by Wezel Flugzeugtechnik. It first flew in 2002.

Often confused with the very similar Albastar Apis, the two designs are not related.

The rights to the Apis 2 design were sold to Yuneec International of China in 2011 with the intention of selling only an electric version. Wezel announced in June 2012 that the move of production had been delayed indefinitely.

Design and development
The Apis 2 is a retractable engine motor glider that is powered by a  Hirth F-33 single cylinder, two-stroke powerplant, fitted with a tractor propeller. The engine is retracted into a bay behind the cockpit for soaring flight. The Apis 2 is built predominantly of composites. The  span wing features winglets and produces a 39:1 glide ratio. The landing gear is a retractable monowheel gear.

In 2003 the aircraft was offered for €50,950 complete.

Specifications (Apis 2)

See also

References

External links

2000s German sailplanes
T-tail aircraft
Motor gliders
Aircraft first flown in 2002
Mid-wing aircraft
Single-engined tractor aircraft
Sentek Global. Sentek Global is consulting firm specializing in systems engineering and cybersecurity. The company's offerings are primarily related to IT security program management, but also include NIST Risk Management Framework (RMF) and leadership training.

History
Sentek Global was founded in 2001 by Eric Basu, a reserve US Navy SEAL officer.

In 2011, Sentek was awarded a $70-million, 5-year contract from the U.S. Navy's Space and Naval Warfare Systems Command to provide information assurance, systems engineering, and other services related to software and implementation.

In 2021, Sentek Global was acquired by Deloitte.

References

Defense companies of the United States
Companies based in San Diego
Mooney TX-1. The Mooney TX-1 or Mooney MT-20 was a prototype American military basic training aircraft of the 1980s.  It was a two-seat derivative of Mooney's popular M20 light aircraft, but was unsuccessful, only a single example being built.

Design and development
In late 1982 the Mooney Aircraft Company of Kerrville, Texas flew a prototype of a two-seat military trainer aircraft, the Mooney TX-1. This was based on its popular Mooney M20K four seat light aircraft, but with side-by-side seating for pilot and instructor under a sliding canopy.  It was an all-metal low-winged monoplane with retractable tricycle landing gear powered by a single Continental O-360 piston engine driving a two-blade propeller. The TX-1 was aimed at the basic trainer market, also being suitable for weapons training and light attack missions, and so was fitted with four hardpoints under the wing.

Mooney stated that they needed orders for 100 aircraft to launch production of the TX-1, but these did not occur, and no production followed. The prototype's aircraft registration was canceled in 1989.

Specifications

See also

Notes

References

"Airdata File: Mooney TX-1". Air International, August 1983, Vol 25 No 2. ISSN 0306-5634. pp. 100–101. 
 Beavis, Simon. "Military Aircraft of the World". Flight International, 3 August 1985, pp. 29–83.

1980s United States military trainer aircraft
TX-1
Aircraft with retractable tricycle landing gear
Low-wing aircraft
Aircraft first flown in 1982
Single-engined piston aircraft
Bethe–Feynman formula. The Bethe–Feynman efficiency formula, a simple method for calculating the yield of a fission bomb, was first derived in 1943 after development in 1942. Aspects of the formula are speculated to be secret restricted data.

Related formula
a = internal energy per gram
b = growth rate
c = sphere radius

A numerical coefficient would then be included to create the Bethe–Feynman formula—increasing accuracy by more than an order of magnitude.

where γ is the thermodynamic exponent of a photon gas,  is the prompt energy density of the fuel, α is V (neutron velocity) / λ (total reaction mean free path), R is the critical radius and 𝛿 is the excess supercritical radius .

See also
 Richard Feynman
 Hans Bethe
 Robert Serber

References

Nuclear physics
Richard Feynman