omniomni/omni-engineering huggingface dataset:
THK-13. The THK-13 was an experimental tail-less glider built by the Turk Hava Kurumu Ucak Fabrikasi (THK) in Turkey in the late 1940s.

Design and development
The THK-13 was a tail-less glider, built predominantly from wood with fabric covering, with the pilot sitting in a faired open cockpit on the centre-line at mid-chord. The aircraft was controlled through ailerons on the inner portion of the trailing edges with pitch control through elevators outboard of the fins, situated at approximately ¾-span giving yaw control and stability. The undercarriage was of the mono-wheel type, common to many gliders, but with outrigger wheel struts in the lower fins keeping the aircraft level when on the ground.

Operational history
To validate the design a 10% scale model was attached to a THK-5 and used as a flying wind tunnel, to validate the design values. The THK-13 was initially planned to have a small piston engine or turbojet, but was completed as a glider, principally launched by aero-tow behind a Focke-Wulf Fw 44. The first flight took place in mid 1948, flown by Kadri Kavukçu, lasting for around 30 minutes. Modifications were carried out before the next flight in August 1948, flown by Cemal Uygun. The aircraft took-off, but at  the right wing dropped, caused by a control restriction, so Uygun carried out an emergency landing, with the aircraft suffering some damage. Repairs were carried out and flight tests resumed, revealing poor yaw stability and heavy rudder forces. The rudders were reduced in area shortly before the THK-13 was exhibited at the 1949 Paris Air Show. Further development of the THK-13 was abandoned when THK's priorities were re-aligned.

Specifications (THK-13)

References

Further reading

External links
photographs

1940s Turkish civil aircraft
Tailless aircraft
Glider aircraft
Aircraft first flown in 1948
Low-wing aircraft
Robert N. Hartzell. Robert Norris Hartzell (born June 3, 1896 in Ohio, died December 11, 1968) was an American entrepreneur who started Hartzell Propeller in 1917, a company that produces aircraft propellers.

Life and work

Background

Romert N. Hartzell studied to be an engineer at the University of Cincinnati, but quit his studies in 1917 to help his father in his lumber business.

Plane propellers

An embargo enforced by the First World War made access to goods problematic, and the firm had to improvise. They changed production to rifle flasks, while also delivering lumber to companies that produced plane propellers. Orville Wright, who lived nearby, and knew of Hartzell's interest in planes and flying, suggested that the company started producing plane propellers themselves. Hartzell started doing this, and received an order from the US Navy for propellers for Liberty engines, the most common plane motor of the time.

The war ended, and orders dried up. Hartzell began production of its first plane, the FC-1. The plywood plane participated in a race in 1923 which it won. An improved model, the FC-2, won a second race the following year. However, Hartzell found it problematic to compete against his own customers, and to combine production of propellers with aircraft.

From the 1920s, the company again explored alternative ways of making money. He had heard that there was money in ceiling fans, and founded the Hartzell Propeller Fan Company. The company also made cabinets for radios and record players, and car wheels. At the same time, the company received orders from the Navy for propellers for the airships Macon and Shenandoah.

With the Second World War came new opportunities and orders from the defence forces. Hartzell moved over from walnut propellers to metal for Curtiss-Wright and Hamilton Standard. After the war, he became the market leader in propellers with variable pitch made from aluminium, while also creating propeller blades from composite materials. In 1949 he patented the composite Hartzite.

Thought to be lightweight and low cost, Harzell's propeller was the market leader in the 60s and 70s, with a market share of over 90% of two-engined small planes.

Hartzell died in 1968.

In 2015 he was inducted into the National Aviation Hall of Fame.

References

External links
Biography at nationalaviation.com

University of Cincinnati alumni
People from Darke County, Ohio
1896 births
1968 deaths
National Aviation Hall of Fame inductees
American aviation businesspeople
American company founders
Businesspeople from Ohio
20th-century American businesspeople
Fritz Borgnis. Fritz E. Borgnis (December 24, 1906 – August 27, 1982) was a German applied physicist and electrical engineer, known for his contributions to microwave physics,  guided waves and ultrasonic measurements for medical diagnostics.

Background 
Borgnis was born on December 24, 1906, in Mannheim, Germany. After completing high school in Hamburg, he matriculated at the Technische Hochschule of Munich where he received a diploma in electrical engineering in 1929. He continued at the University of Munich and obtained a Dr. Ing. degree in the field of current flow by convection and diffusion. He continued his academic career at the University of Graz followed by two years at the ETH Zurich from 1948 until 1950. During the next seven years, he worked and taught at various universities in the USA. From 1957 until 1960, Borgnis acted as director of research at the Allgemeine Deutsche Philips Industrie in Hamburg. 1960 Borgnis accepted a faculty position at the ETH in Zurich. He became full professor for high-frequency electronics.

From the early 1960s, Borgnis' projects at ETH dealt with measurements of flow in liquids using ultrasound. Several publications describe the progress achieved as pioneers in this field. Initial experiments were performed in blood vessels of dogs. Later, experiments to measure the flow in human blood vessels were conducted.

Borgnis retired in 1977 after working and teaching at the ETH during 17 years.

Books 
Electromagnetic Waveguides and Resonators, in Handbuch der Physik, vol. XVI, (Springer-Verlag, 1958).  With Charles H. Papas
Randwertprobleme der Mikrowellenphysik (Springer-Verlag, 1955).  With Charles H. Papas

Awards 
 Fellow of the American Physical Society 
 Fellow of the Institute of Electrical and Electronics Engineers
 Fellow of the Acoustical Society of America

References 

1906 births
1982 deaths
20th-century German engineers
Academic staff of ETH Zurich
Fellows of the IEEE
Fellows of the American Physical Society
German electrical engineers
Academic staff of the University of Graz
People from Mannheim
Technical University of Munich alumni
Ludwig Maximilian University of Munich alumni
Philips employees
20th-century German physicists
Wiwynn. Wiwynn Corporation () is a Taiwanese company specializing in the design, manufacturing, and delivery of cloud infrastructure products, including servers, storage systems, and networking equipment. Founded in 2012 as a subsidiary of Wistron Corporation, Wiwynn quickly became a leading provider in the data center industry, serving hyperscale cloud providers and enterprise customers globally. Wiwynn partnered with IBM to enhance its infrastructure using IBM Spectrum Scale and IBM Elastic Storage Server (ESS), efficiently managing and scaling its data storage capabilities to meet growing customer demands.

In 2023, Wiwynn's strategic positioning in the AI server market, particularly in response to the rising demand from cloud service providers like Meta, Microsoft, and AWS, accounted for nearly 50% of global server procurement, highlighting Wiwynn's key role in the industry.

Wiwynn has also been at the forefront of adopting NVIDIA's latest technology. In 2024, Wiwynn showcased its AI computing solutions based on the NVIDIA GB200 NVL72 system at the NVIDIA GTC 2024 conference. The GB200 system, featuring the Grace Blackwell Superchip, delivers improvements in AI model inference speed, power efficiency, and scalability, according to the StorageReview blog.

In 2024, Wiwynn was recognized by TIME magazine as one of the world's most sustainable companies, ranking #416 globally and #15 in Taiwan.

References

External links
Official website

Taiwanese companies established in 2012
Technology companies of Taiwan
Companies listed on the Taiwan Stock Exchange
Central Interceptor. The Central Interceptor is a wastewater infrastructure project in Auckland, New Zealand. The project is being undertaken by Watercare Services and involves boring a  diameter wastewater pipe underneath the Auckland central isthmus, to carry wastewater flows from parts of the city to the Māngere Wastewater Treatment Plant.

The project allows for population growth in Auckland and the resulting increased wastewater demands, and also aims to reduce the amount of wastewater overflows from the older combined wastewater/stormwater systems in western Auckland, which currently, on strong rainfall days, are forced to dump excess water (contaminated by faeces) into the Waitematā Harbour. One typical example was on 27 January 2023, when a water quality alert was issued for 11 Auckland beaches because of wastewater overflows in heavy rain. The new capacity of the central interceptor is expected to reduce these overflows by at least 80%, reducing the times per year that contaminated stormwater is dumped into the harbour from 52 days a year to 10 or fewer days. Sixteen access shafts, up to  deep, will be constructed.

The new interceptor will be New Zealand's largest wastewater project, costing approximately $1.5B, and is 13 km long (plus 4.3km of link sewers). It is to run from Western Springs to Māngere.
In 2021 consent was granted to extend the project to Tawariki St, Grey Lynn - enabling the new tunnel to connect to the Orakei Sewer Main.
In May 2024, resource consent was granted to extend the tunnel further to Point Erin Reserve - giving the project a final length of 16.2 km. This ranks as New Zealand's third longest tunnel.

Construction
The construction contract was signed in March 2019 with the Ghella Abergeldie Joint Venture. Construction is expected to be from 2019 to 2024.

Construction will be via tunnel boring machine, and the course will take the tunnel  underneath the Manukau Harbour, though (due to the height of the central isthmus). In other areas it will be as much as  below properties.

In May 2021, Watercare reported that the project was 8 months into what was expected to be a 5 year construction period.  A  long tunnel boring machine had been delivered and was being prepared for service.  Local school children have gifted a name for the tunnel boring machine: Hiwa-i-te-rangi.

References

Sewerage infrastructure in New Zealand
Auckland
Proposed infrastructure in New Zealand
International Conference on Surface Plasmon Photonics. The International Conference on Surface Plasmon Photonics (SPP) is a biennial conference series in the field of plasmonics, including electron-plasmon interactions; energy harvesting; graphene, mid-IR, and THz plasmonics; near-field instrumentation; novel plasmonic materials; particle manipulations; plasmonic, metasurface, and metamaterial devices; sensors and transducers for biomedical applications; ultrafast and nonlinear phenomena; and quantum plasmonics.

Special issues
Several scientific journals have published special issues reporting results from recent SPP conferences:
SPP6: 
SPP7: 
SPP8: 
SPP9: Mortensen, N. Asger;  Berini, Pierre; Levy, Uriel; Bozhevolnyi, Sergey I. (2020-02-04). "Proceedings of 9th International Conference on Surface Plasmon Photonics (SPP9)". Nanophotonics 9 (2): 245 (2020). doi:10.1515/nanoph-2019-0532

References

Physics conferences
Biennial events
Recurring events established in 2001
Plasmonics
USCGC Joseph Tezanos. USCGC Joseph Tezanos (WPC-1118) is the United States Coast Guard's 18th Sentinel-class cutter. She was commissioned on August 26, 2016. She was the sixth of the first cohort of six Fast Response Cutters home-ported in San Juan, Puerto Rico.

Design

Like her sister ships, Joseph Tezanos is designed to perform search and rescue missions, port security, and the interception of smugglers.  She is armed with a remotely-controlled, gyro-stabilized 25 mm autocannon, four crew served M2 Browning machine guns, and light arms. She is equipped with a stern launching ramp, that allows her to launch or retrieve a water-jet propelled high-speed auxiliary boat, without first coming to a stop.  Her high-speed boat has over-the-horizon capability, and is useful for inspecting other vessels, and deploying boarding parties.

Operational career
Just days before being commissioned into active service, Joseph Tezanos was the on-scene coordinator for the rescue of the burning cruise ferry Caribbean Fantasy several miles outside of San Juan harbor. Leading a flotilla of federal, territorial, commercial, and Good Samaritan vessels, the plankowner crew of Joseph Tezanos saved all 511 crewmembers and passengers from Caribbean Fantasy. This was the largest mass rescue in US waters since the Andrea Doria.

In late March 2019, Joseph Tezanos seized a large shipment of illegal drugs from a  "go-fast" vessel off Loiza, Puerto Rico.  Three smugglers from the Dominican Republic were seized, together with $25 million worth of cocaine, and 2 tons of marijuana, worth an additional $3.5 million.

Namesake

In 2010, Charles "Skip" W. Bowen, who was then the United States Coast Guard's most senior non-commissioned officer, proposed that all 58 cutters in the Sentinel class should be named after enlisted sailors in the Coast Guard, or one of its precursor services, who were recognized for their heroism.  The Coast Guard chose Joseph Tezanos as the namesake of the 18th cutter.  Tezanos enlisted in the Coast Guard after the breakout of World War II, in 1942.  He served as a gunner's mate aboard the Landing Ship Tank LST 20 where landings included Kiska, Alaska, Tarawa Atoll, and Kwajalein Atoll.  In April 1944, while moored in Pearl Harbor the LST 20 was near a cataclysmic explosion among vessels loaded with ammunition that posed a grave risk of setting off the explosives in other vessels.  Tezanos led a crew of volunteers that took a boat dangerously close to the conflagration, and rescued over forty survivors.

References

Sentinel-class cutters
Ships built in Lockport, Louisiana
2016 ships
Alsberg Brothers Boatworks. Alsberg Brothers Boatworks was an American boat builder based in Santa Cruz, California. The company specialized in the design and manufacture of fiberglass racing sailboats.

The company was founded by Terry and Peter Alsberg in 1982 and went out of business in 1988. Terry Alsberg had previously worked for Moore Sailboats.

History

The Alsberg brothers founded their company to build the Express 27, one of the first designs to be built using the vacuum bag moulding process. This boat was intended to compete with designs like the Moore 24 and the Olson 30 as an ultralight racer. Earlier designs in this class had proven fast on reaches and downwind, but did not go well to windward. Designer Carl Schumacher drew the Express 27 design and the company was formed to build it. The resulting boat became a quick commercial success and 117 were completed.

Designer Schumacher explained the 27's design origins in a 1985 interview in Latitude 38, "Terry and I started off with the idea of building a boat the same weight as a Moore 24, but two feet longer. But we eventually decided on the largest possible boat that could use a single speed (Barient 10) winch for the jib, which turned out to be 27 feet."

The company expanded to produce two more Schumacher designs, the Express 34 and 37, both enlarged versions of the basic Express 27 design.

The company went out of business in 1988, as a result of the effects of launching the company into the 1981 and 1982 recessions, plus low pricing. Founder Terry Alsberg explained, "we'd been building custom boats and selling them at production prices". The company had completed 210 boats in six years.

Boats 
Summary of boats built by Alsberg Brothers Boatworks:

Express 27 - 117 built
Express 34 - 28 built
Express 37 - 65 built

See also
List of sailboat designers and manufacturers

References

External links

Alsberg Brothers Boatworks
Manufacturing companies established in 1982
1988 disestablishments in California
1981 establishments in California
American companies disestablished in 1988
Defunct sailboat manufacturers
American companies established in 1982
BLIS (software). In scientific computing, BLIS (BLAS-like Library Instantiation Software)
is an  open-source framework for implementing a superset of BLAS (Basic Linear Algebra Subprograms) functionality for specific processor types that was awarded the J. H. Wilkinson Prize for Numerical Software in 2023.  It exposes that functionality through two traditional Application Programming Interfaces (APIs): the BLAS interface and the CBLAS interface. BLIS also includes two APIs native to the framework: a typed (BLAS-like) API and an object API. These native interfaces provide access to BLAS-like functionality that is not supported by, but closely related to, operations found in the BLAS (and CBLAS).
The framework is developed and supported by the Science of High-Performance Computing (SHPC) group of the Oden Institute for Computational Engineering and Sciences at The University of Texas at Austin and the Matthews Research Group at Southern Methodist University.

BLIS yields high performance on many current CPU microarchitectures in both single-threaded and multithreaded modes of execution. BLIS also offers competitive performance for some cases of matrix multiplication in which one or more matrix operands are unusually skinny and/or small.

The framework achieves high performance by employing specialized kernels (typically written in GNU extended inline assembly syntax) along with cache and register blocking through matrix operands. BLIS also works on processors for which custom kernels have not yet been written; in those cases, the framework relies upon portable kernel implementations that perform at a lower rate of computation.

BLIS is sometimes described as a refactoring of GotoBLAS2, which was created by Kazushige Goto at the Texas Advanced Computing Center.

See also
 Automatically Tuned Linear Algebra Software (ATLAS)
 OpenBLAS 
 Intel Math Kernel Library (MKL)

References

External links
 

Numerical linear algebra
Numerical software
Liquid Haskell. Liquid Haskell is a program verifier for the programming language Haskell which allows specifying correctness properties by using refinement types. Properties are verified using a satisfiability modulo theories (SMT) solver which is SMTLIB2-compliant, such as the Z3 Theorem Prover.

See also
 Formal verification

References

Further reading

External links
 
 

Formal methods tools
Static program analysis tools
Type systems
Free software programmed in Haskell
Software using the BSD license
Rolf Prince. Rudolf George Herman Prince  (2 August 1928 – 3 July 2017), commonly known as Rolf Prince, was a noted chemical engineering academic, specializing in distillation and mass transfer.

Life
Prince was born in Chemnitz, Germany on 2 August 1928 from a Jewish family. He and his mother moved to Italy in 1936, to Ireland in 1939 and to New Zealand in 1940, and he became a naturalised New Zealand citizen in 1946. He was educated at Christchurch Boys' High School in Christchurch, then studied chemical engineering and chemistry at Canterbury University College of the University of New Zealand graduating in 1949.  He then took a PhD at the University of Sydney, Australia, becoming a lecturer there. In 1953 he moved to the UK as a process engineer with The Distillers Company.

From 1958, Prince pursued an academic career, starting as a lecturer at the University of Canterbury, New Zealand, then in 1960 a senior lecturer at the University of Sydney and in 1965 a professor at the University of Queensland, where he established a new department of chemical engineering. From 1969 to 1994 he was professor and head of the department of chemical engineering at the University of Sydney, remaining there until his retirement in 1998.

Prince died in Sydney on 3 July 2017.

Family
He married Laurel Williamson (19 November 1926 – 7 April 2018), whom he met while a student.  They had three children.

Honours
Officer of the Order of Australia (AO)
Peter Nicol Russell Memorial Medal from Engineers Australia
President, Institution of Chemical Engineers 1986–7
Fellow, Australian Academy of Technology and Engineering
His portrait was painted by Robert Hannaford and won an Archibald Prize in 1998

References

1928 births
2017 deaths
Australian chemical engineers
People from Chemnitz
University of Canterbury alumni
Officers of the Order of Australia
People educated at Christchurch Boys' High School
Academic staff of the University of Canterbury
Academic staff of the University of Sydney
Academic staff of the University of Queensland
Jewish emigrants from Nazi Germany to New Zealand
Naturalised citizens of New Zealand
German emigrants to Australia
Chemical engineering academics
TACOMSAT. TACOMSAT (also known as TACSAT 1, OPS 0757, or Tactical Communications Satellite) was a communications satellite designed and built by Hughes Aircraft Corporation under the direction of the United States Air Force Space and Missile Systems Organization (SAMSO).  TACOMSAT was used by the United States Department of Defense to explore the feasibility of geostationary satellite communications between ground stations comprising fixed bases, military field units, aircraft, and ships.

Construction 
At  in length and  in diameter, TACOMSAT was the largest and most powerful communications satellite at the time of its launch.  The -long main cylinder of the HS-308 bus was spin-stabilized at 54 rpm with the antennas mounted to a despun platform in an early version of the Hughes Gyrostat design.  The platform was equipped with a variety of antennas, including a five-element UHF bifilar helical antenna array, two X band horn antennas, and a biconical antenna for telemetry and control.

The UHF transponder could provide a maximum RF output of 230 watts over a 10 MHz bandwidth, while the X band transponder could provide 30 watts over 10 MHz of bandwidth.  The two transponders could be interconnected, allowing all signals to be exchanged between bands with a reduced usable bandwidth of 425 kHz.

The combination of high RF power and stable antenna platform resulted in strong signals that could be received by antennas as small as  in diameter.  This permitted remotely deployed field units to communicate with one another and with headquarters.  High RF power also permitted simultaneous access by many users across the transponder bandwidth.

Mission 
After a February 9, 1969 launch on a Titan IIIC launch vehicle, TACOMSAT reached a geostationary transfer orbit over the Pacific Ocean.  After more than three years of successful experiments by the US Army, US Air Force, and US Navy, TACSAT was decommissioned on December 16, 1972.

References

Reconnaissance satellites of the United States
Cancelled spacecraft
Moore House (Ojai, California). The Moore House is a residential home in Ojai, California designed by Modernist architect Richard Neutra in 1952 .

Neutra received the AIA First Honor Award for the building's design in 1954.

History 
Neutra designed the house for a 40-acre plot owned by James and Orline Moore. The couple chose the location based on its vicinity to the home of Jiddu Krishnamurti, of whom they were disciples.

One of the house's most notable features is a series of moat-like ponds surrounding the house. The pools served two functions, humidifying the air around the house and irrigating a nearby garden.

The Moores added a cabana of a style similar to that of Neutra in the late 50s, reportedly straining the relationship between the couple and architect.

References 

Richard Neutra buildings
Buildings and structures in Ojai, California
Houses completed in 1952