omniomni/omni-engineering huggingface dataset:
Marc J. Assael. Marc J. Assael (born 5 August 1954) is a Greek Chemical Engineer and a professor of Thermophysical Properties.

Career 
From 1995 to 1997 he was the Head of the Department of Chemical Engineering at Aristotle University of Thessaloniki, Greece, where he currently holds the position of Professor of Thermophysical Properties. In 1998 he was TEPCO Chair Visiting Chair in Keio University, Tokyo, Japan, and during 2007-2011 he was adjunct professor in Xi’an Jiaotong University, P.R. China. He is currently the Secretary of the International Association for Transport Properties, the Secretary of the International Organization Committee of the European Conference on Thermophysical Properties, and a Fellow of the International Thermal Conductivity Conferences (FITCc). In 2023, during the 22nd European Conference on Thermophysical Properties, Prof. Marc J. Assael was honored with the Lifetime Achievements Award, for his longstanding and distinguished contributions to the field of thermophysics.

He is Editor-in-Chief of the Springer-Nature International Journal of Thermophysics,  Editor of Old City Publishing High Temperatures - High Pressures journal,  Guest Editor of Elsevier Education for Chemical Engineers  and of the Praise Worthy Prize International Review of Chemical Engineering journal.

Education 
He received his BSc, MSc and PhD degrees in Chemical Engineering from Imperial College London.

Published work 
Assael has authored and co-authored about 200 scientific publications in the field of Thermophysical Properties. Most cited books:

 Assael M.J., Trusler J.M.P., and Tsolakis Th.F., "Thermophysical Properties of Fluids. An Introduction to their Prediction", Imperial College Press, London, U.K. (1996).
 Assael M.J. and Kakosimos K.E., “Fires, Explosions and Toxic Gas Dispersions: Effects Calculation and Risk Analysis”, CRC Press., Boca Raton, U.S.A. (2010).
 Assael M.J., Wakeham W.A., Goodwin A.R.H., Will S., Stamatoudis M., "Commonly Asked Questions in Thermodynamics", CRC Press., Boca Raton, U.S.A. (2011).
 Assael M.J., Goodwin A.R.H., Vesovic V. and Wakeham W.A. Eds., “Experimental Thermodynamics Volume IX: Advances in Transport Properties of Fluids”, RSC Press., London U.K. (2014).

References

External links
 

20th-century Greek scientists
21st-century Greek scientists
Living people
Chemical engineering academics
Engineers from Thessaloniki
Academic staff of the Aristotle University of Thessaloniki
Fellows of the Institution of Chemical Engineers
1954 births
Warsztaty Szybowcowe SG-7. The Warsztaty Szybowcowe SG-7 was a Polish high performance, single seat sailplane. Two prototypes flew in 1937 but, outperformed by their contemporaries, no more were built.

Design and development

The SG-7, a development of the Warsztaty Szybowcowe SG-3 with reduced dimensions, was designed during 1936-7 to meet a government call for a high performance sailplane. It first flew in the late spring of 1937, followed in July by a second and final airframe.

The SG-7 was a wooden aircraft with a two-part, cantilever, high gull wing. Each part was built around a single spar which acted as the rear member of a torsion-resistant D-box formed with plywood surfacing around the leading edge. Behind the spar the wing was fabric-covered apart from a ply reinforced region at the join over the fuselage. The wing was trapezoidal in plan out to rounded tips, with differential ailerons over more than half the span.

Its fuselage was an oval-section, semi-monocoque plywood structure with the wing mounted above it on a faired pylon. Its enclosed cockpit was ahead of the pylon. The fuselage tapered aft to a narrow, integral fin which carried a fabric-covered, roughly D-shaped unbalanced rudder. The fin also mounted, a little above the fuselage, a narrow, ply-covered tailplane carrying rounded, fabric-covered elevators with a gap for rudder movement.  The landing gear consisted of an under-fuselage, pneumatically sprung skid, assisted by a tailskid.

When competed, the SG-7s were  overweight, reducing their predicted performance.

Operational history

One SG-7 appeared at the 1937 Scout Jamboree, held in the Netherlands in late July and in early August the other competed at the Fifth National Glider Cpntest in Inowrocław but only achieved 26th place. Though it flew better at low speeds and in turbulent conditions than the PWS-101 and the Warsztaty Szybowcowe Orlik it was otherwise inferior in performance and manoeuvrability and so did not go into production. The two prototypes remained in use until 1939, when modifications were required to meet new requirements on structural safety in cloud flight. These had not been completed before the 1939 Invasion of Poland.

Specifications

References

Aircraft first flown in 1937
1930s Polish sailplanes
High-wing aircraft
Gull-wing aircraft
Pearson Electra. The Pearson Electra is an American trailerable sailboat that was designed by Carl Alberg as a Midget Ocean Racing Club (MORC) racer and first built in 1960.

The Electra design was developed into the Pearson Ensign in 1962, primarily by enlarging the cockpit and shrinking the cabin. The two boats share the same hull design.

Production
The Electra was the second design built by Pearson Yachts. A total of 350 examples were completed before production ended.

Design
The Electra is a recreational keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, a spooned raked stem, a raised reverse transom, a keel-mounted rudder controlled by a tiller and a fixed long keel. It displaces  and carries  of ballast.

The design has a draft of  with the standard long keel and is normally fitted with a small  outboard motor for docking and maneuvering.

The design has sleeping accommodation for four people, with a double "V"-berth in the bow cabin and two straight settee berths in the main cabin. The head is located in the bow cabin under the "V"-berth. Cabin headroom is .

The design has a PHRF racing average handicap of 264 and a hull speed of .

Operational history
The boat is supported by an active class club, the Pearson Yachts Portal.

In a 2010 review Steve Henkel wrote, "this early fiberglass Alberg design was introduced the year after the ground-breaking 29-foot Pearson Triton hit the ways in 1959, and was one of the first small fiberglass cruising sailboats. In those days the marketers weren't always sure what the market would bear, so the Electra at first was sold as a basic two-berth overnighter, with extra cost options that would make her a full-fledged cruiser (forward berths, galley, icebox, toilet, etc.). The Pearson Ensign 22, a weekend version using the same hull but featuring a larger cockpit and smaller cabin, followed in 1962, and turned out to be much more popular than the Electra. Best features: The Electra, being a near clone of the Ensign, has many of the same stats, which make her relatively fast for her day (though definitely not faster relative to more recent designs). Some say she is better looking than many of the cruisers in her size range. Worst features: Compared to the Hunter 22, her comp[etitor] other than the Ensign, she generally has less headroom. Her draft is deep enough for casual racing, but wouldn't stand up to many deeper-draft keelboats or shallower boats with centerboards (unless her extremely high PHRF rating could be brought to bear)."

See also
List of sailing boat types

Related development
Pearson Ensign

Similar sailboats
Alberg 22
Cape Dory 22
Capri 22
Catalina 22
CS 22
DS-22
Edel 665
Falmouth Cutter 22
Hunter 22
J/22
Marlow-Hunter 22
Marshall 22
Nonsuch 22
Santana 22
Seaward 22
Spindrift 22
Starwind 223
Tanzer 22
US Yachts US 22

References

Keelboats
1960s sailboat type designs
Sailing yachts
Trailer sailers
Sailboat types built in the United States
Sailboat type designs by Carl Alberg
Sailboat types built by Pearson Yachts
ChangXin Memory Technologies. ChangXin Memory Technologies (CXMT, ) is a Chinese semiconductor integrated device manufacturer headquartered in Hefei, Anhui, specializing in the production of DRAM memory.

, ChangXin manufactured LPDDR4 and DDR4 memory on a 19 nm process, with a capacity of 40,000 wafers per month. The company planned to increase output to 120,000 wafers per month and launch 17 nm LPDDR5 by the end of 2022, with a target total capacity of 300,000 wafers per month in the long-term.

History
Together with Fujian Jinhua Integrated Circuit (JHICC) and Xi'an UniIC Semiconductors, Innotron was one of a set of Chinese semiconductor plants established in 2016 to compete with global manufacturers of computer memory. In 2017, a $7.2 billion deal for a 125,000, 12" (300mm) wafer per month production fabrication plant was announced. Innotron's factory was completed by the middle of 2017, and production equipment was installed at the plant in late 2017. Trials and mass production were scheduled for late 2018 and early 2019. In 2018, CEO Zhu Yiming was reported to have visited ASML to discuss the purchase of extreme ultraviolet lithography machines.

Initially, Innotron was thought to have chosen 8GB LPDDR4 memory as its first product. At the time, analysts claimed that patent and IP issues would present a barrier to its competing with major manufacturers. In the middle of 2018, trial production of 19 nm 8GB LPDDR4 was reported to have begun. Innotron's initial capacity was ~20,000 wafers per month; a small output in terms of the industry as a whole.

In 2019, Innotron, which had changed its name to Changxin Memory Technologies, was reported to have made some design changes in an attempt to avoid possible technology-related sanctions deriving from the China–United States trade war. In December 2019, in an interview with EE Times, the company stated its first fab was in production and producing 20,000 wafers per month, making 8GB LPDDR4 and DDR4 DRAM at 19 nm.

The company is reported to have increased production to 3% of the world DRAM output, or about 40,000 wafers a month by the end of 2020.

U.S. federal ban 

In 2022, the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023 banned the U.S. federal government from buying or using chips from CXMT. In March 2024, Bloomberg News reported that the United States Department of Commerce's Bureau of Industry and Security was weighing sanctions on CXMT.

Facilities
As of 2019, CXMT had over 3,000 employees, and runs a fab with a 65,000 square meters clean room space. Over 70% of its employees are engineers working on various research and development related projects. CXMT uses its 10G1 process technology (aka 19 nm) to make 4 GB and 8 GB DDR4 memory chips. It has licensed intellectual property originally created by Qimonda.

LPDDR4 RAM was added to the product portfolio in 2020.

See also
Semiconductor industry
Semiconductor industry in China
List of semiconductor fabrication plants

Notes

References

External links

Chinese brands
Manufacturing companies based in Hefei
Foundry semiconductor companies
Semiconductor companies of China
Government-owned companies of China
Winnie Apiyo. Winnie Adhiambo Apiyo (born c.1987) is a Kenyan electrical engineer who is employed as a Protection, Instrumentation and Control Engineer at Kenya Electricity Generating Company, the largest power producing company in Kenya, the largest economy in the East African Community.

Background and education
Apiyo was born in Kenya, circa 1987. She graduated with a Bachelor of Engineering degree in Electric & Electronic engineering, awarded by Tver State University, in Tver, Russia, in 2010.

She also has a postgraduate diploma in Geothermal Technology, obtained from the Iceland Energy Authority, in collaboration with the United Nations University, following a six-month study program of highly specialized studies in Geothermal technology and management. She was a member of the class of 2016. As of January 2019, she is enrolled in the Iceland School of Energy, at Reykjavik University, pursuing a Master of Science in Sustainable Energy Engineering.

Career
Apiyo serves as an electrical engineer at Kenya Electricity Generating Company. Her specialty in training and work is the planning, testing, and management of geothermal power stations. She has special interest, training and expertise in designing, maintaining and improving these energy infrastructure developments. In her native country of Kenya, she is one of a very small number of female electrical engineers, with special training and expertise in geothermal technology.

Achievements
In September 2018, Business Daily Africa, a Kenyan, English language, daily newspaper, named Winnie Apiyo among the "Top 40 Under 40 Women in Kenya in 2018".

In December 2017, Ms Apiyo received the 2017 Women in Energy Innovation Award at the 2nd Annual Women in Energy Conference, held from 13 until 14 December 2017, in Nairobi, Kenya's capital city. The award was in recognition of her work outlined in the attached abstract, named "Automatic Blockage of Grid Energy Back Feed Project".

See also
 Charity Wayua
 Gladys Ngetich
 Cynthia Wandia

References

External links
 About the Geothermal Training Program by the United Nations University & the Iceland Energy Authority
  Impact analysis of electric vehicles charging on the Icelandic power system: Abstract of Presentation of Winnie Adhiambo Apiyo, MSc Fellow in Sustainable Energy Engineering at Reykjavík University

1980s births
Living people
21st-century Kenyan engineers
21st-century Kenyan scientists
21st-century Kenyan women engineers
21st-century Kenyan women scientists
Electrical engineers
Kenyan electrical engineers
Luo people
Luo women
Reykjavík University alumni
Tver State University alumni
Hunter 466. The Hunter 466 is an American sailboat that was designed by the Hunter Design Team as a cruiser and first built in 2002.

Production
The design was built by Hunter Marine in the United States, but it is now out of production.

Design
The Hunter 466 is a recreational keelboat, built predominantly of fiberglass, with wood trim. It has a B&R masthead sloop rig, a raked stem, a walk-through reverse transom with a swimming platform and folding ladder, an internally mounted spade-type rudder controlled by a wheel and a fixed fin keel or optional wing keel. the fin keel model displaces  and carries  of ballast, while the wing keel model  displaces  and carries  of ballast

The boat has a draft of  with the standard keel and  with the optional shoal draft wing keel.

The boat is fitted with a Japanese Yanmar diesel engine of . The fuel tank holds  and the fresh water tank has a capacity of .

Factory standard equipment included a 110% roller furling genoa, full roach mainsail, two two-speed self tailing jib winches, two two-speed self rigging winches, an electric self tailing halyard winch, an electric anchor winch, anodized spars, marine VHF radio, knotmeter, depth sounder, AM/FM radio and CD player with six speakers, dual off-set anchor rollers, hot and cold water transom shower, integral solar panel, a sealed teak and holly cabin sole, two fully enclosed heads with showers, private forward and aft cabins, a dinette table that converts to a berth, a dual cabin ad workshop layout, six complete sets of kitchen dishes, microwave oven, dual sinks, three-burner gimbaled liquid petroleum gas stove and oven, a fog bell, emergency tiller and six life jackets. Factory options included a double aft cabin, air conditioning, mast furling mainsail, spinnaker and associated hardware, 8 gph water-maker and leather cushions.

The design has a hull speed of .

See also
List of sailing boat types

Similar sailboats
Hunter 45
Hunter 456
Hunter 460

References

External links
Official brochure

Keelboats
2000s sailboat type designs
Sailing yachts
Sailboat type designs by Hunter Design Team
Sailboat types built by Hunter Marine
Rolls-Royce ACCEL. The Rolls-Royce ACCEL (Accelerating the Electrification of Flight) is an electric aircraft demonstrator developed by Rolls-Royce plc.

Development

Rolls-Royce developed the ACCEL as a racing aircraft to gain the all-electric air speed record, targeting over . The existing electric aircraft record at that time was , set in 2017 by a Siemens powered Extra 330.

Designed at Gloucestershire Airport, the project is partly funded by the UK government and involves partners such as electric motor and controller manufacturer YASA Limited and aviation start-up Electroflight.

The team aimed to reach the 1931 Schneider Trophy speed, which was won by a R-R-powered Supermarine S.6B, reaching .

On 15 September 2021, Rolls-Royce announced the aircraft, named Spirit of Innovation, had successfully completed its first flight, flying from MoD Boscombe Down for fifteen minutes.
It subsequently reached a top speed of , and sustained  over 3 km,  over 15 km, and was able to climb to  in 3min 22s. The speeds achieved were accepted as world records for electric aircraft by the Fédération Aéronautique Internationale in January 2022.

Design 

The  span aircraft is powered by triple stacked 200kW YASA 750R axial flux motors with a high power density driving a single three-blade propeller spinning at 2,400 RPM. The 750 Volt, 216 kWh battery has 6,480 cells, with cork insulation and active cooling. Battery output power will be  continuous, reaching  at maximum power.. It is designed to have the highest energy density for an aircraft, and should allow a  range.

The aircraft is derived from the carbon fibre Sharp Nemesis NXT racer, which has a cruising speed of  with a  piston engine, but can reach  with a highly tuned engine.  The maximum take-off weight of the NXT is 1,200 kg. Rolls-Royce intend the battery, motors and control equipment in a production system to weigh the same as the regular engine and fuel tank in a conventional aircraft, but the battery pack alone in the Spirit of Innovation currently weighs 1350 kg.

References

External links
 

ACCEL
Electric aircraft
Low-wing aircraft
Aircraft first flown in 2021
Three-engined single-prop tractor aircraft
Stephen Twinoburyo. Stephen Twinoburyo (8 January 1970 – 1 January 2019) was a Ugandan scientist, mathematician, lecturer, and entrepreneur. He was the  CEO of Scimatic Solutions, a South African company which helps students with maths and science tuition.

Early life and education
Twinoburyo was born on 8 January 1970, in Mbarara, Uganda. He was the second of seven children, and his father worked as a town clerk. He attended Ntare School, and was head prefect there in 1989.

In 1990, he started studying engineering at Makerere University, and relocated to South Africa. During his time there, he was chairman of Lumumba Hall. He later studied mathematics as a part-time degree at the University of South Africa, completing the course in 2007.

Career
In 1994, Twinoburyo visited Soweto, South Africa, and it inspired him to move to the country in 1997. He lectured at the University of Pretoria, and taught in colleges in Pretoria and Cape Town.

In 2008, Twinoburyo decided to found Uganda Professionals Living in South Africa (AUPSA), and worked as their chairman. In 2009, he organised a meeting of Ugandan expatriates in South Africa. The meeting was held in Sandton, South Africa. AUPSA was set up to connect Ugandan expatriates living in South Africa. Twinoburyo also worked for the Ugandan Civil Alliance Network.

In 2010, Twinoburyo said that Ugandans were unhappy about the ticket prices for the 2010 FIFA World Cup in South Africa. In 2011, he condemned alleged human rights abuses in Uganda, and asked South African president Jacob Zuma not to attend the inauguration of Ugandan president Yoweri Museveni.

In 2014, Twinoburyo set up and became the CEO of Scimatic Solutions, a South African company which helps students with maths and science tuition. He was inspired to set up the company after visiting the California Science Center and National Air and Space Museum in Washington, D.C. The company is based in Hatfield, Pretoria.

Personal life
Twinoburyo and his wife had three children. He died in South Africa on 1 January 2019 of a heart attack, one week before his 49th birthday. His body was repatriated to Uganda.

References

1970 births
2019 deaths
Ugandan mathematicians
People from Mbarara
Academic staff of the University of Pretoria
21st-century Ugandan businesspeople
University of South Africa alumni
Ugandan expatriates in South Africa
Makerere University alumni
Marlow-Hunter 50. The Marlow-Hunter 50 is an American sailboat that was designed by the Hunter Design Team as a cruiser and first built in 2010.

The design was originally marketed by Hunter Marine as the Hunter 50 AC (for Aft Cockpit), but the company became Marlow-Hunter in 2012 and the boat was renamed the Marlow-Hunter 50.

Production
The design was built by Hunter Marine in the United States starting in 2010 and remained in production in 2019.

Design
The Marlow-Hunter 50 is a recreational keelboat, built predominantly of fiberglass. It has a B&R rig masthead sloop rig, a raked stem, an aft cockpit, a walk-through reverse transom with a swimming platform and folding ladder, an internally mounted spade-type rudder controlled by dual wheels and a fixed fin keel or wing keel. The fin keel version it displaces  and carries  of ballast, while the wing keel version displaces  and carries  of ballast.

The boat has a draft of  with the standard keel and  with the optional shoal draft wing keel.

The boat is fitted with a Japanese Yanmar diesel engine of . The fuel tank holds  and the fresh water tank has a capacity of .

Standard equipment includes a mast furling mainsail, mainsheet traveler on a stainless steel arch. Options include a single self-tacking jib or a self-tacking staysail with overlapping jib in a cutter rig. There are two window arrangements, an earlier one with five individual side ports and a later one with five ports in a sweeping arch.

The design has a hull speed of .

Operational history
In a 2011 review, Cruising World writer Herb McCormick noted the large range of options that allow for a high degree of customization of the boat to customer's desires. "For instance, there are shoal-draft and deep-draft keel and ballast choices (5 feet 6 inches and 12,544 pounds or 7 feet and 11,216 pounds, respectively); standard or tall rigs (63 feet 4 inches and 68 feet 6 inches, both measured from the waterline); regular or more robust Yanmar diesels (75 horsepower or 110 horsepower), and even two different ways of approaching the headsails and foretriangle configuration (a single self-tacking jib or a self-tacking staysail with an overlapping jib). Regarding the latter, of course, either headsail arrangement is paired with Hunter’s “backstayless” B&R rig, a mainsheet traveler arch, and a battened, full-roach mainsail. For the Hunter Design Team, some things are too iconic to mess with."

upon the design's introduction, a brief Sail magazine staff report noted, "Below decks excellent use has been made of the hull's considerable volume, with all the deft touches Hunter owners have come to expect."

See also
List of sailing boat types

Related development
Marlow-Hunter 50 Center Cockpit

Similar sailboats
C&C 50
Hunter HC 50
Marlow-Hunter 47

References

External links

Keelboats
2010s sailboat type designs
Sailing yachts
Sailboat type designs by Hunter Design Team
Sailboat types built by Hunter Marine
Polyvinyl ether. Polyvinyl ethers are a class of organic polymers derived from vinyl ethers. Common monomers include methyl vinyl ether and ethyl vinyl ether, the polymer having the formula [CH2CH(OR)]n (R = methyl, ethyl).  Commercial interest has also focused on polymers derived from ethyl, isobutyl, octadecyl substituents in place of methyl. Like other vinyl polymers, the polymers exhibit tacticity.  Polymerization is typically initiated with Lewis acids such as boron trifluoride.

References

Organic polymers