omniomni/omni-engineering huggingface dataset:
Arthur Van Vlissingen. Arthur Van Vlissingen Jr. (November 22, 1894 - October 20, 1986) was an American writer and bureau chief for Business Week and Newsweek, noted as editor of the Factory and Industrial Management journal.

Life and work 
Van Vlissingen was born in Chicago to Arthur H. Van Vlissingen, who was a prominent developer and commercial real estate broker in Chicago. After obtaining an engineering degree at the Northwestern University, and joined the US Navy to serve in World War I.

After graduation he joined the McGraw-Hill Publishing company as Assistant editor and later editor for the Factory and Industrial Management journal. He continued to edited the magazine in the 1930s when it was renamed Factory Management and Maintenance. In 1927 Van Vlissingen published "The Yankee of the Yards: The Biography of Gustavus Franklin Swift," co-authored with Louis Franklin Swift. This work provides a history of Chicago's meat packing industry from the viewpoint of the son of the founder of the largest packing company in the world.

In the 1930s he joined Business Week, where he became bureau chief in the Midwest. He later joined Newsweek, where he headed its bureau. In the 1960s he co-authored some more works on the history of postal offices in the 19th century.

Selected publications 
 Dunlap, John R., Arthur Van Vlissingen and John Michael Carmody (eds.). Factory and industrial management, New York, The Engineering Magazine Co., 1928-1929
 Swift, Louis Franklin, Arthur Van Vlissingen. Yankee of the Yards: The Biography of Gustavus Franklin Swift. A.W. Shaw and Company, Chicago, Illinois . (1927).
 Richow, Harold E., Ray Van Handel, and Arthur Van Vlissingen. The Territorial Post Offices of Wisconsin: Their Covers and Postmarks, July 4, 1836-May 29, 1848: Including Those which Were in the Michigan Territory, October 6, 1821-July 3, 1836. Wisconsin Postal History Society, 1963.
 Van Vlissingen, Arthur, and Morrison Waud. New York Foreign Mail Cancellations, 1870-1876. Collectors Club of Chicago, 1968.

Articles, a selection:
 Van Vlissingen, Arthur. "The BIG Idea behind Those SMALL Plants of Ford's." Factory Management and Maintenance 96: 46.
 Arthur Van Vlissingen, Jr., "Fred Harvey," Factory and Industrial Management 78 (Nov. 1929): 1085. 34.

References

External links 
 Writer Arthur Van Vlissingen at chicagotribune.com
 

1890s births
1986 deaths
American editors
Northwestern University alumni
Writers from Chicago
20th-century American non-fiction writers
Hjorth parameters. Hjorth parameters are indicators of statistical properties used in signal processing in the time domain introduced by Bo Hjorth in 1970. The parameters are Activity, Mobility, and Complexity.
They are commonly used in the analysis of electroencephalography signals for feature extraction. The  parameters are normalised slope descriptors (NSDs) used in EEG.
Moreover, in the robotic area, the Hjorth parameters are used for tactile signal processing for the physical object properties detection such as surface textures/material detection  and touch modality classification via artificial robotic skin.

Parameters

Hjorth Activity
In the activity parameter represents the signal power, the variance of a time function. This can indicate the surface of power spectrum in the frequency domain. This is represented by the following equation:

Where y(t) represents the signal.

Hjorth Mobility
The mobility parameter represents the mean frequency or the proportion of standard deviation of the power spectrum. This is defined as the square root of variance of the first derivative of the signal y(t) divided by variance of the signal y(t).

Hjorth Complexity
The Complexity parameter represents the change in frequency. The parameter compares the signal's similarity to a pure sine wave, where the value converges to 1 if the signal is more similar.

Tactile Signal Analysis
In the earlier works, researchers employed the Fourier transform technique to interpret the obtained tactile information for texture classification. However, the Fourier transform is not appropriate for analysing non-stationary
signals in which textures are irregular or non-uniform. Short time Fourier transform or Wavelet might be the most appropriate techniques to analyse non-stationary signals. However, these methods deal with a large number of
data points, thereby causing difficulties at the classification step. More features require more training samples resulting in the growth of the computational complexity as well as the risk of over-fitting. To overcome these issues Kaboli  et al.  proposed a set of fundamental tactile descriptor inspired by Hjorth parameters.  Although Hjorth parameters are defined in the time domain, they can be interpreted in the frequency domain as well. The Activity parameter is the total power of the signal. It is also the surface of the power spectrum in the frequency domain (Parseval's theorem). The Mobility parameter is determined as the square root of the ratio of the variance of the first derivative of the signal to that of the signal. This parameter is proportional to a standard deviation of the power spectrum. It is an estimate of the mean frequency. Complexity gives an estimate of the bandwidth of the signal, which indicates the similarity of the shape of the signal to a pure sine wave. Since the calculation of the Hjorth parameters is based on variance, the computational cost of this method is sufficiently low, which makes them appropriate for the real-time task.

References

Statistical signal processing
SourcePuller. SourcePuller is an open-source client for accessing the BitKeeper version control system. It was originally developed by Andrew Tridgell, who – according to BitKeeper developer Larry McVoy – reverse engineered the BitKeeper protocol. While not widely used itself, it is best known for triggering the BitKeeper controversy, which sparked the switch of the Linux kernel from BitKeeper to Git.

References

External links 
 https://sourceforge.net/projects/sourcepuller/

2005 software
Free version control software
Free software programmed in C
TaxiBot. The TaxiBot, developed by the Lahav Division of Israel Aerospace Industries, is a semi-robotic, towbarless aircraft tractor.

Its primary function is to transport an aircraft from the terminal gate to the take-off area (taxi-out phase) and back to the gate post-landing (taxi-in phase). TaxiBot has been suspected to be able to reduce the need for airplane engines during these phases. Operational control of the TaxiBot is maintained by the aircraft's pilot from the cockpit, using standard pilot controls.

There are two models of the TaxiBot available. The Narrow-Body (NB) model is compatible with single-aisle aircraft, including the Airbus A320 and Boeing 737 series. The Wide-Body (WB) model is meant for twin-aisle aircraft, such as the Airbus A380 and Boeing 747.

History
The TaxiBot completed certification tests in July 2014, was approved for airport towing in November 2014, and had the first commercial flight dispatch-towed (Lufthansa LH140 from Frankfurt to Nuremberg) on November 25, 2014. In February 2015, the TaxiBot entered regular flight operations by Lufthansa at Frankfurt Airport. Certification tests of the Wide-Body model occurred from 2016 to 2018.

In October 2019, Air India became the first airline to "regularly" use the TaxiBot by deploying the unit to dispatch a Delhi–Mumbai flight from Terminal 3 of Indira Gandhi International Airport in New Delhi, one of the Top 10 airports in the world by annual passenger traffic.

References

External links 
 

Vehicles of Israel
Aircraft ground handling
Tractors
Barani Institute of Information Technology. Barani Institute of Information Technology (BIIT) was established at the Pir Mehr Ali Shah Arid Agriculture University  and is located in Rawalpindi, Punjab, Pakistan. The institute is a self-financed/ self-funded project and was established as a partnership venture between the Pir Mehr Ali Shah Arid Agriculture University and Resource Organizers and Software Engineers (ROSE) International.

Academic programs
Bachelor of Science in Computer Science (General Computing)  BSCS (GC)
Bachelor of Science in Computer Science (Artificial Intelligence)  BSCS (AI)
Bachelor of Science in Software Engineering BS (SE)

References

Universities and colleges in Rawalpindi District
Intramolecular vibrational energy redistribution. Intramolecular vibrational energy redistribution (IVR) is a process in which energy is redistributed between different quantum states of a vibrationally excited molecule, which is required by successful theories explaining unimolecular reaction rates such as RRKM theory. Such theories assume a full statistical redistribution between all vibrational modes, but restricted redistribution could enable bond selective chemistry for which deposited energy must remain in a particular mode for as long as it takes for the required reaction to take place.

References

Chemical processes
Chemical physics
Quantum chemistry
Molecular physics
Chemical kinetics
Transversal Corporation. Transversal Corporation is a British software company specializing in cloud-based knowledge management.

History

Transversal was founded in 1998 by Davin Yap and David MacKay, researchers at the University of Cambridge, to develop a business application for answering customers' questions.  Yap served as CEO until 2003 and again from 2005 to 2014, when he was replaced by company executive Heather Richards.

In 2007, Transversal was named one of the UK's 20 fastest-growing venture companies. During the 2010s it broadened its geographical reach by opening offices in Australia, Germany and the United States.

In 2019, Transversal was acquired by Verint Systems.

Products and services

Transversal provides knowledge management software for customer-facing websites, contact centers and enterprise systems. It offers an end-to-end implementation service (including consultancy and design), as well as an API to enable its technology to be integrated with existing platforms.

Awards and recognition

Transversal and its clients won the Contact Centre Association's award for Best Technology Partnership in 2008, 2009 and 2010. In 2014, Transversal was a top-ten finalist in the SME category at the Digital Leaders awards and a finalist in the Technology Services Industry Association's Vision Awards. KMWorld named Transversal among its vendors of "trend-setting products" from 2014 through 2018, and listed Transversal as one of the "100 companies that matter in knowledge management" from 2015 through 2019. In 2018, Transversal's CEO Heather Richards was named Cambridge Judge Business School Woman Entrepreneur of the Year.

References

External links
 Transversal Corporation official website

Software companies of the United Kingdom
Companies established in 1998
Companies based in Cambridge
Boiler (water heating). The term boiler may refer to an appliance for heating water. Applications include water heating and central heating.

Operation
The boiler heats water to a temperature controlled by a thermostat. The water then flows (either by natural circulation or by a pump) to radiators in the rooms which are to be heated. Water also flows through a coil in the hot water tank to heat a separate mass of water for bathing, etc.

Condensing boiler

Back boiler

A back boiler is a device which is fitted to a residential heating stove or open fireplace to enable it to provide both room heat and domestic hot water or central heating.

See also
 Electric water boiler
 Heat-only boiler station
 Multi-fuel stove

References

Heating, ventilation, and air conditioning
Residential heating appliances
Boilers
Vortech Skylark. The Vortech Skylark is an American helicopter produced by Vortech of Fallston, Maryland. The aircraft is supplied in the form of plans for amateur construction. Vortech also supplies rotor blades for the design.

Design and development
The Skylark was designed to comply with the US Experimental - Amateur-built aircraft rules. It features a single main rotor, a single-seat open cockpit without a windshield, skid-type landing gear and a twin cylinder, liquid-cooled, in-line two-stroke, carbureted  Hirth 3503 aircraft engine. The twin cylinder, liquid-cooled, in-line two-stroke,  Rotax 582 has also been used. A cockpit enclosure was optional.

The aircraft fuselage is made from welded 4130 steel tubing, with an aluminium tail boom. Its  diameter two-bladed rotor employs a NACA 0012 airfoil. The main transmission is of belt and chain type, whileteh tail rotor is driven by a long shaft. The control system consists of conventional helicopters controls. The aircraft has an empty weight of  and a gross weight of , giving a useful load of . With full fuel of  the payload for pilot and baggage is .

The manufacturer estimates the construction time as 300 hours.

Operational history
By 2005 the company reported that 5 were completed and flying.

By January 2015 no examples were registered in the United States with the Federal Aviation Administration, although one had been registered at one time.

The airframe plans have been spreading via internet under name "Furia".

Specifications (Skylark)

See also
List of rotorcraft

References

External links

Skylark
1980s United States sport aircraft
1980s United States helicopters
Homebuilt aircraft
Single-engined piston helicopters
Vortech A/W 95. The Vortech A/W 95 is an American helicopter that was designed by Adams-Wilson as the Adams-Wilson Choppy and now produced in an improved version by Vortech of Fallston, Maryland. The aircraft is supplied in the form of plans for amateur construction. Vortech also supplies rotor blades and other key parts for the design.

Design and development
The A/W 95 was designed to comply with the US Experimental - Amateur-built aircraft rules, but if built lightly enough may qualify as an ultralight aircraft, under the US FAR 103 Ultralight Vehicles rules, with that category's maximum empty weight restriction of . The aircraft has a standard empty weight of .

The A/W 95 features a single main rotor, a single-seat open cockpit without a windshield, skid-type landing gear and can accept engines of . The standard engine used is the twin cylinder, air-cooled, two-stroke, dual-ignition  Rotax 503 engine. The aircraft fuselage is made from bolted-together aluminum tubing. Its two-bladed main rotor has a diameter of . The aircraft has an empty weight of  and a gross weight of , giving a useful load of . With full fuel of  the payload for pilot and baggage is .

The manufacturer estimates the construction time as 250 hours.

Operational history
By 2005 the company reported that six aircraft were completed and flying.

By January 2015 two examples had been registered in the United States with the Federal Aviation Administration, although a total of three had been registered at one time.

Specifications (A/W 95)

See also
A-B Helicopters A/W 95
Showers Skytwister Choppy
List of rotorcraft

References

External links

A W 95
1990s United States sport aircraft
1990s United States helicopters
Homebuilt aircraft
Single-engined piston helicopters
MaterialCenter. MaterialCenter is a materials data management system designed to capture data from integrated processes for traceability across the enterprise during the entire product life cycle. 
It serves as the single point of entry for materials related activities such as physical test data entry and reduction, multi-scale materials modeling, approval work flow, and the export of simulation ready data to analysis. MaterialCenter supports commercial CAE products including MSC Nastran, MSC Fatigue, Marc, and e-Xstream Digimat.

See also
 MSC Software

References

External links
 
 MSC Software
 Seller Fuse

Manufacturing software
Computer-aided manufacturing software
Computer-aided engineering software
Vortech Shadow. The Vortech Shadow is an American autogyro that was designed by Tyler Flight, Inc. and produced by Vortech of Fallston, Maryland. The aircraft is supplied as a kit and also in the form of plans for amateur construction. Vortech also supplies rotor blades for the design.

Design and development
The Vortech Shadow was designed to comply with the US Experimental - Amateur-built aircraft rules. It features a single main rotor, a two-seats-in side-by-side configuration enclosed cockpit with a windshield, tricycle landing gear, plus a tail caster. The acceptable power range is . The standard engine used is the four cylinder, air-cooled, four-stroke, dual-ignition  Lycoming O-320 powerplant in pusher configuration.

The aircraft fuselage is made from tubing and composites. Its two-bladed rotor has a diameter of  . The aircraft has a typical empty weight of  and a gross weight of , giving a useful load of . With full fuel of  the payload for the pilot, passenger and baggage is .

The standard day, sea level, no wind, take off with a  engine is  and the landing roll is .

The manufacturer estimates the construction time from the supplied kit as 250 hours.

Operational history
By 1998, the company reported that four kits had been sold, completed, and were flying.

In January 2015, no examples were registered in the United States with the Federal Aviation Administration.

Specifications (Shadow)

See also
List of rotorcraft

References

External links

Shadow
1990s United States sport aircraft
1990s United States civil utility aircraft
Homebuilt aircraft
Single-engined pusher autogyros
Design space exploration. Design Space Exploration (DSE) refers to systematic analysis and pruning of unwanted design points based on parameters of interest. While the term DSE can apply to any kind of system, we refer to electronic and embedded system design in this article.

Given the complex specification of electronic systems and the plethora of design choices ranging from the choice of components, number of components, operating modes of each of the components, connections between the components, choice of algorithm, etc.; design decisions need to be based on a systematic exploration process. However, the exploration process is complex because of a variety of ways in which the same functionality can be implemented. A tradeoff analysis between each of the implementation option based on a certain parameter of interest forms the basis of DSE. The parameter of interest could vary across systems, but the commonly used parameters are power, performance, and cost. Additional factors like size, shape, weight, etc. can be important for some handheld systems like cellphone and tablets. With growing usage of mobile devices, energy is also becoming a mainstream optimization parameter along with power and performance.

Owing to the complexity of the exploration process, researchers  have proposed automated DSE where the exploration software is able to take decisions and comes up with the optimal solution. However, it is not possible to have an automated DSE for all kind of systems and hence there are semi-automated methods of DSE where the designer has to steer the tool after every iteration towards convergence. Since the exploration is a complex process which takes large computational time, researchers have developed exploration tools which can give an approximate analysis of the system behavior in a fraction of time compared to accurate analysis. Such tools are very important for quick comparison of design decisions and are becoming more important with increasing complexity of designs.

To simplify the complexity of DSE, researchers have been continuously striving to raise the abstractions of component and system definition to be able to cater to larger and complex systems. For example, instead of modeling a digital system at transistor or gate level, there have been attempts to use RTL or behavioral modeling. Further higher abstractions like SystemC or block diagram based modeling are also used depending on the system requirements. Modeling at higher abstractions allows fast exploration of various design choices for the lower level implementation.

The ability to operate on the space of design candidates makes DSE useful for many engineering tasks, such as rapid prototyping, optimization, and system integration.

See also
 Computer experiment
 Design of experiment
 MULTICUBE
 Multifactor design of experiments software
 Probabilistic design
 Randomized block design

References

Design of experiments
Industrial engineering
Systems engineering
Quantitative research
Experiments
Hexamine stove. A hexamine stove, or hexi-stove, is a cooking stove that uses hexamine fuel tablets. These tablets, known chemically as hexamethyl-enetetramine or methenamine, are often referred to colloquially as "hexi tabs" or simply "tabs." Hexi-stoves are favored for emergency situations and are commonly issued to military service members in the field due to their portability and reliability.

The stove serves a dual purpose: it acts as a platform for cooking and, when flipped upside down, as a windbreak to shelter the flame during cooking. Designed for convenience, the hexamine stove folds into a compact size for easy storage and transport. It can be used with its folding legs either up or down, depending on the specific cooking needs.

A notable feature of the hexi-stove is its ability to protect the fuel tablets during transport. When the stove is folded, it securely encloses the hexamine tablets, shielding them from damage. Hexamine is an efficient and stable fuel, making it ideal for portable stoves due to its high energy density and ease of ignition.

See also
Beverage-can stove
Outdoor cooking
Rocket stove
List of stoves

References

Stoves
Softex-Aero V-24. The Softex-Aero V-24 is a proposed five place twin engined aircraft from Ukrainian-based Softex-Aero.

Design and development
The V-24 is a T-tailed twin engine composite construction pusher aircraft with retractable tricycle landing gear. The aircraft will be powered by either Rotax 912, or 160 hp  Lycoming IO-320 engines. The aircraft has a Galaxy GRS 1200 parachute system integrated into the airframe. Turboprop engines are also under consideration.

Variants
V-24
Rotax 912 power
V-24L
160hp  Lycoming IO-320
V-24TP
PBS TJ-100 turboprop power

Specifications (V-24)

References

External links
Softex-Aero
YouTube video
YouTube video

Twin-engined pusher aircraft
LCDR M class. The LCDR M class was a class of 4-4-0 steam locomotives of the London, Chatham and Dover Railway. The class was designed by William Kirtley and introduced in 1877, intended for the heaviest express services between London and Dover.

History
William Kirtley took over as locomotive superintendent of the railway following the death of William Martley in 1874. Martley's Europa class 2-4-0 were performing well on the lightly loaded Dover-Flushing boat trains but a larger engine was required for some of the heavier services on the main line. Kirtley therefore designed a 4-4-0 for this purpose. The six locomotives were built by Neilson and Company of Glasgow and introduced during June and July 1877.  They proved to be successful for these tasks and were only superseded on the heaviest trains by the larger  M3 class The locomotives passed to the South Eastern and Chatham Railway in 1899 and were considered to be sufficiently useful to be worth re-boilering between 1899 and 1903. The class was withdrawn and scrapped from 1911 to 1914.

References

 

M
4-4-0 locomotives
Railway locomotives introduced in 1877
Scrapped locomotives
Neilson locomotives
Standard gauge steam locomotives of Great Britain