omniomni/omni-engineering huggingface dataset:
Hüseyin Şehitoğlu. Hüseyin Şehitoğlu (born October 23, 1957, in Istanbul, Turkey) is a Turkish mechanical engineer who holds the John, Alice, and Sarah Nyquist Endowed Chair at the Department of Mechanical Engineering at the University of Illinois at Urbana-Champaign, United States.
Hüseyin Şehitoğlu received a B.S. in mechanical engineering from City University London, in 1979, and a M.S., and Ph.D. in theoretical and applied mechanics from the University of Illinois at Urbana-Champaign, in 1981 and 1983, respectively.

Professor Şehitoğlu served as department head of the Mechanical Engineering Department at the University of Illinois from 2004 to 2009. He was named a Grayce Wicall Gauthier Professor from 2000 to 2004 and then a C.J. Gauthier Professor from 2004 to 2008.  In 2008, Şehitoğlu was named the first ever John, Alice, and Sarah Nyquist Endowed Chair in Mechanical Science and Engineering.  In addition, Professor Şehitoğlu is a fellow of the American Society of Mechanical Engineers and was a recipient of the society's Nadai Medal in 2007.  From 2003 to 2008 Şehitoğlu was Editor of the ASME Journal of Engineering Materials and Technology. In 2012, Şehitoğlu was awarded by the University of Illinois for his excellence in graduate-level mentoring.

In 2020, Şehitoğlu was the recipient of the Khan Plasticity Award for "“outstanding life-long contributions in the field of plasticity primarily through research contributions." In 2022, Şehitoğlu was given the Moris Cohen Award from The Minerals, Metals & Materials Society. This award recognizes an individual who has made exceptional contributions to the science and/or technology of materials properties.  Also in 2022, Şehitoğlu was elected an honorary member of the American Society of Mechanical Engineers “for outstanding contributions in mechanical engineering and materials science, particularly in the area of fatigue of materials, and for lifelong engagement with ASME and the mechanical engineering community."

Notes

External links 
 Huseyin Sehitoglu University Profile

References 

"Huseyin Sehitoglu." MechSE Department. Ed. Kimberly Green. University of Illinois, n.d. Web. 07 Oct. 2012.

"Nadai Medal." ASME. Ed. John Kosowatz. American Society of Mechanical Engineers, 1 Jan. 2012. Web. 07 Oct. 2012.
 
Staub, Merideth. "Sehitoglu Receives Campus-Wide Award for Graduate Mentoring." MechSE Department. University of Illinois, 5 Mar. 2012. Web. 07 Oct. 2012.

Turkish mechanical engineers
Living people
1957 births
Alumni of City, University of London
Walter Bouldin Dam. Walter Bouldin Dam is a dam in Elmore County, Alabama.  The closest town is Wetumpka.

The earthen dam was constructed in 1967 by the Alabama Power Company, with a height of , and a length of  at its crest.  It impounds the Coosa River for 225 MW of hydroelectric power, the last and largest of Alabama Power's string of seven hydropower facilities on that river.  It's also the largest of all Alabama Power hydropower facilities.

The reservoir it creates, Bouldin Lake, is connected via free-flowing canal to Jordan Lake, making one reservoir with a water surface of , shoreline of about , a total length of , and a maximum storage volume of .  It's an excellent recreational lake with fishing opportunities for largemouth bass, spotted bass, bluegill and other sunfish, crappie, catfish, striped bass, hybrid and white bass. The lake has two public access sites.

Walter Bouldin Dam failed on February 10, 1975 by breach, with no casualties and no property damage beyond the dam property itself.

References 

Energy infrastructure completed in 1967
Dams in Alabama
Reservoirs in Alabama
Alabama Power dams
Buildings and structures in Elmore County, Alabama
Hydroelectric power plants in Alabama
Bridge navigational watch alarm system. A Bridge Navigational Watch Alarm System, abbreviated BNWAS, is an automatic system which sounds an alarm if the watch officer on the bridge of a ship falls asleep, becomes otherwise incapacitated, or is absent for too long a time. The BNWAS is automatically engaged when the ship's autopilot is activated. THIS IS NOT THE ONLY MEANS OF ACTIVATING THE SYSTEM.

The minimum requirement for a BNWAS under International Maritime Organization standards is to have a dormant stage and three alarm stages, except that on a non-passenger vessel, the second stage may be omitted.

Stage 1:
When the autopilot is engaged, the bridge officer is required to signal his presence to the BNWAS system every 3 to 12 minutes in response to a flashing light, either by moving an arm in front of a motion sensor, pressing a confirmation button, or directly applying pressure to the BNWAS centre.

Stage 2:
When a confirmation signal fails to occur within 15 seconds in Stage 1, an alarm will sound on the bridge, and if there is still no confirmation signal after a further 15 seconds, in the captain's and the first officer's cabins. One of them must then go to the bridge and cancel the alarm.

Stage 3:
If neither the captain nor the first officer cancels the alarm within a specified time period (between 90 seconds and 3 minutes depending on the size of the vessel), an alarm will sound in locations where other personnel are usually available.

In addition an emergency call function may be provided, by which bridge personnel can activate a Stage 2 or Stage 3 alarm to call for help.

IMO requirements under the SOLAS resulting from an amendment of June 5, 2009, come into force on the following dates for ships classified by size:

July 2011: new vessels in excess of 150 tonnes

July 2011: all passenger vessels

July 2012: all vessels in excess of 3,000 tonnes

July 2013: all vessels between 500 and 3,000 tonnes

July 2014: all vessels between 150 and 500 tonnes

Specific nations have added further regulations. For example, vessels of the Norwegian coastal fishery are required to activate a speed sensor connected to the vessel's motor or GPS.

Wired and wireless versions are available.

References

Maritime safety
Law of the sea
Brits Airfield. Brits Airfield (ICAO-Code: FABS) is a small airfield located in Brits, South Africa. It mainly facilitates light and ultra-light aircraft as well as Gliders.

Communication 
 Communication Frequencies
 Brits Airfield 124.20 MHz (Unmanned)

Notes 
The airfield has Landing Lights. As these are not automated, arrangements need to be made in advance.
 The following fuel is available:
 AVGAS 100 LL 
 MOGAS (only by arrangement)

References 

Airports in South Africa
UQM Technologies. UQM Technologies Inc was an American manufacturer of electrical motors, generators, motor controllers, fuel cell compressor systems and hybrid systems for passenger and commercial vehicles. Established in 1967 as Unique Mobility Inc, UQM was based in Longmont, Colorado. UQM's products were sold direct to original equipment manufacturers (OEM).

History
The company was involved in the late 1970s Unique Mobility Electrek vehicle, a 2-door 2+2 seater made of fibreglass-reinforced plastic and powered by 16 six-volt batteries. The Electrek featured regenerative braking and could reach a claimed maximum speed of 75 mph and an urban driving range of 75 miles.

Given its contribution to the application of hybrid electric propulsion to small military boats, UQM received a $70,000 Phase I contract which was awarded by the Office of Naval Research from the U.S. Navy, in 2003.

UQM provided PowerPhase propulsion systems for Zenith Motors shuttles, RegenNautics marine applications, Hino Motors electric city buses and Proterra electric composite buses, among others and has been used by several concept cars such as the Audi A1 e-tron and Rolls-Royce 102EX Electric Phantom. The PowerPhase Pro system entered production in October 2011. The German company Ruf Automobile modified a Porsche 911 into an electric version called eRuf Model A, using UQM's 150kW PowerPhase motor. 

In 2008, Boeing made aviation history by achieving the first crewed flight of a fuel-cell-powered aircraft which used a UQM motor.

In 2010, UQM received a visit from vice-president Joe Biden to promote the $45 million of Stimulus Act money the company received. 

In 2019, the company was acquired by Danfoss, effective on July 31.

References

External links
 
 https://www.uniquemobility.org/

Manufacturing companies based in Colorado
Longmont, Colorado
Motor vehicle engine manufacturers
Engine manufacturers of the United States
Companies formerly listed on NYSE American
Fukui function. In computational chemistry, the Fukui function or frontier function is a function that describes the electron density in a frontier orbital, as a result of a small change in the total number of electrons. The condensed Fukui function or condensed reactivity indicator is the same idea, but applied to an atom within a molecule, rather than a point in three-dimensional space.

The Fukui function allows one to predict, using density functional theory, where the most electrophilic and nucleophilic sites of a molecule are.

History and background
The Fukui function is named after Kenichi Fukui, who investigated the frontier orbitals described by the function, specifically the HOMO and LUMO. Fukui functions are related in part to the frontier molecular orbital theory (also known as the Fukui theory of reactivity and selection, also developed by Kenichi Fukui) which discusses how nucleophiles attack the HOMO while at the same time placing their surplus electrons into the LUMO.

Calculation

Most chemical reactions in general involve a change in electron density of the molecules involved. The Fukui function quantifies this change in electron density at a given position when the number of electrons have been changed. This function is as follows:

where  is the electron density. The Fukui function itself has two finite versions of this change which can be defined by the following two functions. The form of the function will depend on whether or not an electron was removed from or added to the molecule. The Fukui function for the addition of an electron to a molecule is as follows:

.

The next function represents the Fukui function in terms of the removal of an electron from the molecule:

.

The  function represents the initial part of a nucleophilic reaction. The , on the other hand, represents the initial part of an electrophilic reaction. The reaction will therefore then take place where the  can be found to have a large value. Solving for either Fukui function would result in a representation of the molecule's electron density for either electrophilicity or nucleophilicity.

Applications
The Fukui function can be utilized in determining the reactivities of molecules towards other molecules. For example, the difference in the Fukui function before and after a CO molecule bonds with a nanoparticle surface can be used to interpret the nanoparticle's reactivity not only with CO but in other core-shell transition metal nanoparticles.

The Fukui function has been shown to be related to the local softness of a system. This property has allowed it to be used for biological studies involving ligand docking, active site detection, and protein folding.

References

Computational chemistry
Vervoost FV-3 Delphin. The Vervoost FV-3 Delphin () is a German ultralight aircraft, designed and produced by Vervoost Leichtflugzeuge of Sinzig. It was first flown on 19 November 2009 and introduced at the AERO Friedrichshafen show in 2010. The aircraft is supplied as a complete ready-to-fly-aircraft.

Design and development
The FV-3 was originally designed as a research aircraft, but is also offered as a commercial model that complies with the Fédération Aéronautique Internationale microlight rules. It features a cantilever low-wing, a two-seats-in-tandem enclosed cockpit under a bubble canopy, fixed conventional landing gear and a single engine in tractor configuration.

The aircraft fuselage is made from welded steel tubing, with the aft part covered in doped aircraft fabric and the forward part covered in carbon fibre panels. Its  span wing is made from carbon fibre and has an area of  and mounts large flaps. The wings are designed like glider wings and are easily removed, while the tailplane folds to allow ground transportation or storage. The standard engine available is the  Rotax 912ULS four-stroke powerplant.

Variants
FV-3
Microlight version
FV-3F
Research version, with a second generator for flight instrumentation and equipment

Specifications (FV-3 Delphin)

References

External links

2010s German ultralight aircraft
Single-engined tractor aircraft
Systemd-boot. systemd-boot is a free and open-source boot manager created by obsoleting the gummiboot project and merging it into systemd in May 2015.

gummiboot was developed by the Red Hat employees Kay Sievers and Harald Hoyer and designed as a minimal alternative to GNU GRUB for systems using the Unified Extensible Firmware Interface (UEFI). It automatically detected bootable images (including operating systems and other boot loaders), did not require a configuration file, provided a basic menu-based interface, and could also integrate with systemd to provide performance data.

As a word play, the name "gummiboot" means "rubber (inflatable) boat" in German, the native language of its initial developers. Despite being developed by two of its employees, Red Hat's Fedora Project did not use gummiboot for booting UEFI systems; instead, it used efilinux to chainload GRUB.

gummiboot was licensed under LGPL-2.1-or-later, unlike GRUB which is licensed under the GPL-3.0-or-later. This distinction was intended to allow gummiboot to be suitable for use on UEFI systems implementing secure boot, due to concerns surrounding its requirement to distribute all authorization keys (digital certificates) needed to run GPL-v3-licensed software if hardware restrictions such as secure boot are in effect.

See also 

 Comparison of boot loaders

References

External links 
 systemd-boot(7) - Manual page

Free boot loaders
Free software programmed in C
Linux kernel-related software
Linux-only free software
508th. 508th may refer to:

508th Aerospace Sustainment Wing (508 ASW) is a wing of the United States Air Force based out of Hill Air Force Base, Utah
508th Air Refueling Squadron (508 ARS) was an aerial refueling unit that operated the Boeing KB-29 at Turner AFB, Georgia
508th Fighter Squadron, inactive United States Air Force unit
508th Fighter Wing, United States Air Force Reserve unit active with Tenth Air Force, based at Hill Air Force Base, Utah
508th Heavy Panzer Battalion, heavy tank battalion of the German Army during World War II, equipped with Tiger I heavy tanks
508th Infantry Regiment (United States) (508th PIR or Red Devils), regiment of the 82d Airborne Division, became part of XVIII Airborne Corps
508th Missile Squadron (508 MS), missile unit located at Whiteman AFB, Missouri

See also
508 (number)
508, the year 508 (DVIII) of the Julian calendar
508 BC
Van Veen grab sampler. The Van Veen grab sampler is an instrument to sample sediment in water environments. Usually it is a clamshell bucket made of stainless steel. Up to 20 cm deep samples of roughly 0.1 m2 can be extracted with this instrument. It can be light-weight (roughly 5 kg) and low-tech. The smallest version even fits into hand luggage. The sampler was invented by Johan van Veen (a Dutch engineer) in 1933.

A draw-back of the use of this sampler is that it tends to disturb the sediments more than a box corer does.

Mechanism
While letting the instrument down into the water, the two levers with buckets at their ends are spread like an open scissor. The levers are locked in this position, and unlocked on hitting the ground. When the rope is pulled upward again, the two buckets close and grab a sample from the sea floor.

Three small technical changes lead to variations with more mechanical parts or structure:
 The Ekman grab sampler does not close the shovels instantly on ground contact, but a messenger weight has to be sent down in order to release springs and take the sample. 
 The Ponar type sampler is modified also and has additional springs which are released upon bottom contact which might be helpful for harder surfaces.
 The Young modified grab sampler includes a metal frame for additional stability.

See also
 Epibenthic sled

References

External links
 Instrument description at Woods Hole Oceanographic Institute
 Bottom Sediment Grab Samplers as offered by the Rickly Hydrological Company

Aquatic ecology
Biological oceanography
Oceanography
Oceanographic instrumentation
Cecomp. CECOMP Spa (Centro Esperienze COstruzione Modelli e Prototipi) is an Italian automotive company established in 1978 by Giovanni Forneris and is based in La Loggia, Turin. The company specialises in developing prototypes and models for car manufacturers such as Lancia, Maserati and Toyota. Since 2011, the company has expanded into manufacturing, producing the electric Bluecar for the French Bolloré company.

Giovanni Forneris started his career with the Fiat Design Centre and moved on to other well known designers and coach builders in Turin, such as Giovanni Michelotti and Giorgetto Giugiaro.

Cecomp is a founding partner of the Icona Design Group, which specialises in exporting Italian design and engineering services to China.

Projects 
Notable projects include: 

Maserati Biturbo (1978)
Lancia Delta S4 (1984)
Toyota MRJ (1995)
Lancia Fulvia Coupé Concept (2003)
Bolloré Bluecar (2011)
Icona Vulcano (2015)
Microlino (2022)

See also 

List of Italian companies

References

External links 

Coachbuilders of Italy
Car manufacturers of Italy
Engineering companies of Italy
Turin motor companies
Vehicle manufacturing companies established in 1978
Italian companies established in 1978
Italian brands
Electric vehicle manufacturers of Italy
Germanium(IV) iodide. Germanium(IV) iodide is an inorganic compound with the chemical formula GeI4.

Preparation 

Germanium(IV) iodide can be obtained by the reaction of germanium and iodine or the reaction of germanium dioxide and 57% hydriodic acid:

Chemical properties 

Germanium(IV) iodide reacts with tetraalkyl tin at 250 °C to form R2SnI2 and R2GeI2 (R= Et, Bu, Ph). It reacts with germanium and sulfur at high temperatures to produce red GeSI2 and orange Ge2S3I2. It reacts with diiron nonacarbonyl in an ionic liquid ([BMIm]Cl/AlCl3) at 130 °C to obtain Ge12[Fe(CO)3]8I4.

Physical properties 

Germanium(IV) iodide is an orange-red crystalline solid that hydrolyzes in water. It is soluble in carbon disulfide and benzene, but less soluble in carbon tetrachloride and chloroform. It begins to decompose into germanium(II) iodide and iodine above its melting point. Germanium(IV) iodide crystallizes in the cubic crystal system, space group Pa (space group no. 205), with the lattice parameter a = 11.89 Å. The crystal structure consists of tetrahedral GeI4 molecules.

References 

Germanium compounds
Iodides
Tachihi R-53. The Tachihi R-53 was amongst the first aircraft built in Japan after the relaxation of the ban imposed at the end of World War II.  It is a parasol-wing, two seat, training aircraft powered by a British engine. Only one was produced.

Design and development

From the end of World War II until the passage of the Air Law in July 1952, aircraft manufacture in Japan was forbidden. The Tachihi R-52, the R-53's immediate predecessor, was the first post-war Japanese aircraft built with local materials and powered by a Japanese engine. It flew in September 1952, soon followed by the similar but Blackburn Cirrus Major powered R-53.

The R-53 is a parasol-wing monoplane.  In plan its wing is unswept and has constant chord, with no flaps or leading edge slots; it is built around  two spars made from Japanese cypress, with duralumin ribs and fabric covering. On each side there are two sets of wing struts to transfer loads to the fuselage, one an unequal length and angle X-form pair from the lower fuselage longerons to the wing spars, the other pair cabane struts from the upper fuselage to the wing centre section, leaning together.  The fuselage has a welded steel tube frame, fabric covered, with rounded upper decking.  There are two tandem open cockpits, one below the wing trailing edge and the other below mid-chord.  The tailplane is attached to the top of the fuselage, with a trim tab on the elevator; the fin and rudder are curved, the fin extended forward by a lengthy fillet.

The R-53 is powered by a 155 hp (116 kW) Blackburn Cirrus Major four-cylinder inverted inline engine, distinguishing it from the short-nosed radial engine installation on the R-52.  It has a fixed conventional undercarriage with mainwheels fitted with brakes on independent hinged V-form legs with oil spring shock absorbers in separate, more upright, struts from the X-intersection of the wing struts, made more rigid by a secondary strut to mid-fuselage.  The tail wheel is steel sprung and steerable.

The first flight date of the R-53 is not precisely known, but it followed that of the R-52 (September 1952) and it was flying by April 1953. The prototype JA3070 is the only one of its type recorded on the Japanese register before late 1955 so probably the only one built. This aircraft is now restored and displayed in Tachihi's real estate office in Tokyo, although not in airworthy condition.

Specifications

References

1950s Japanese aircraft
Edgar Gretener. Edgar Gretener (2 March 1902 in Lucerne – 21 October 1958 in Zurich) was a Swiss electrical engineer.

Gretener was the twelfth of 14 siblings. He studied electrical engineering at Swiss Federal Institute of Technology (ETH Zurich), where he received his Ph.D. in 1929. He then became head of development at the Albiswerk factory in Zurich. In 1930, he worked as head of the telegraph laboratory of Siemens & Halske in Berlin. There he got in contact with Fritz Fischer (physicist), another Swiss engineer, working as a manager at the central research labs of Siemens. When Fritz Fischer got the call to become professor at the ETH Zurich in 1932, he made Gretener his chief assistant a few years later. Fischer invented the Eidophor video projection system. Gretener was in charge of its implementation.

When World War II started, the Swiss authorities asked Gretener to develop an encryption device for teleprinters. For this purpose the Dr. Edgar Gretener AG was set up as a company in 1943. Gretener got absorbed by this new challenge. As his replacement, Hugo Thiemann continued the development of the Eidophor system at the ETH. When Fischer died unexpectedly in 1947, Thiemann and the Eidophor project were transferred to Gretener's company. It now had two lines of R&D: encryption devices and Eidophor, which still needed development to make it a viable product. Finally, the marketing effort led to first contracts for this new wide-screen video projection system.

The untimely death of Gretener in 1958 led to the renaming of his company, which continued under new ownership as GRETAG AG.

Literature 
 W. Gerber: Obituary in Schweizerische Bauzeitung, 1958 (76), p. 782.

References 

1902 births
1958 deaths
Swiss electrical engineers
ETH Zurich alumni
Swiss cryptographers
Arne Wegner Haaland. Arne Wegner Haaland (28 October 1923 – 23 June 2012) was a Norwegian engineer.

He was born in Lunde, Telemark and graduated as a civil engineer from the Norwegian Institute of Technology. In 1955 he was hired by Veidekke to construct an airfield in Ethiopia, and two years later he was contracted to a project in Brazil by the company Furuholmen. He returned to Veidekke in 1960, and served as its chief executive officer from 1962 to 1989. He continued as a board member until 1995. He died in June 2012.

References

1923 births
2012 deaths
People from Telemark
People from Lunde, Telemark
Norwegian Institute of Technology alumni
Norwegian engineers
Norwegian businesspeople
Norwegian expatriates in Ethiopia
Norwegian expatriates in Brazil