omniomni/omni-engineering huggingface dataset:
Thomas Ristenpart. Thomas Ristenpart is a professor of computer security at Cornell Tech.

Biography

Ristenpart received his B.S. in computer science and engineering from the University of California, Davis in 2003, where he also received his M.S. under Matt Bishop in 2005. He then moved to the University of California, San Diego where he received his Ph.D. in computer science under Mihir Bellare.

Research

Ristenpart's research touches on many areas of computer security. Three of his papers are among the highest cited computer security papers of all time.  In cryptography, Ristenpart developed Honey Encryption, a technique that can encrypt data in a way that, if decrypted incorrectly, will return fake data. Ristenpart also developed techniques to develop typo-tolerant passwords, allowing users to authenticate even if they have mistyped their password.

In his cloud security work, Ristenpart found that users on Microsoft's Azure and Amazon's EC2 services could arrange to be placed on the same virtual machine as another user and therefore exploit a side-channel attack to learn information about their data. 

Recently, Ristenpart has studied machine learning privacy and security. He was one of the first researchers to show that machine learning models can leak details about their training datasets. He showed that if a machine learning model is trained on images of peoples faces, then it is possible to reconstruct images of the people contained in the training dataset.

Ristenpart also showed that it is possible to "steal" a machine learning model and reverse-engineer how it works querying the model. Once stolen, it is possible to use the stolen model to generate proprietary data used to train it.

Ristenpart was the Program Chair the USENIX Security Symposium in 2017; Crypto in 2020, and the IEEE Symposium on Security and Privacy in 2022 and 2023.

Awards

Ristenpart received a Best Paper at USENIX Security 2014, ACM CHI 2018, USENIX Security 2020, CSCW 2020, CHI 2022, USENIX Security 2023, and test of time awards for his paper at CCS 2009 and CCS 2012.

References

External links

 https://rist.tech.cornell.edu/

Living people
20th-century births
Year of birth missing (living people)
Computer scientists
Cornell Tech faculty

University of California, Davis alumni
Maxscend Microelectronics. Maxscend Microelectronics (Maxscend; ) is a publicly listed Chinese semiconductor design company that manufactures integrated circuits in the field of radio frequency (RF). It focuses on RF front end design for RF switches, RF low-noise amplifiers and RF filters.

Background 

Maxscend was founded in 2006 by several Silicon Valley employees who returned to China to develop mobile television chips. The popularity of them peaked during the 2008 Summer Olympics. However, due to the development of smartphones, there was a demand for more intelligent chips and the market networks were moving to 4G. The company transformed to meet this new strategy and in 2012 restructured to become a joint-stock company.

Maxscend focused on research and development to come up with new products as its initial funding had dried up and there was no demand for its existing products. Using TSMC's latest RF CMOS process, Maxscend was able to launch its first RF low-noise amplifier in 2013. After this, RF front end  became the main focus of the company.

Maxscend entered the supply chain for smartphone companies that are Android OEMs. Its biggest customer is Samsung while it also serves Xiaomi, Vivo Huawei and Oppo.

On 18 June 2019, Maxscend held its initial public offering becoming a listed company on the ChiNext section of the Shenzhen Stock Exchange.

In 2022, Maxscend started trial production of surface acoustic wave (SAW) filters.

In June 2023, shares of Maxscend fell after its deputy General Manager, Tang Zhuang transferred CNY 3.4 billion (US$472.6 million) of shares to his wife as part of a divorce settlement.With a stake of over 5%, his wife became an official shareholder but renounced her rights such as voting.

In December 2023, it was noted that the Huawei Mate 60 used RF switches supplied by Maxscend.

See also
Semiconductor industry in China

References

External links
 

2006 establishments in China
2019 initial public offerings
Companies based in Wuxi
Companies listed on the Shenzhen Stock Exchange
Electronics companies established in 2006
Semiconductor companies of China
2006 in Wuxi
Mohammed Ahmed (businessman). Captain Mohammed Ahmed Bomba was an Ethiopian air travel industry veteran. He was the CEO of Ethiopian Airlines from 1980 to 1991 and later served as the secretary general of the African Airlines Association.

Background and education
Mohammed Ahmed was born to a Harari family in July of 1932. In his early career, Mohammed had a brief stint with the Ethiopian Air Force. He held a Bachelor of Science degree in aeronautical engineering, obtained from Saint Louis University and an Executive Program certificate at Stanford University in the United States.

Career at Ethiopian Airlines
Mohammed Ahmed began his career as chief aeronautical engineer at Ethiopian Airlines in the 1960s, playing a foundational role in the airline’s early development. In 1980, he became CEO, known for boldly countering the policies of Ethiopia’s communist Derg regime, thereby preserving the airline’s independence from government influence. Prior to his appointment, Ethiopian Airlines faced operational difficulties that were exacerbated by the Ethiopian Civil War. Mohammed swiftly stabilized the airline, guiding it through challenging times. Quality had declined since the 1970s due to overstaffing and political interference, Mohammed addressed this by reducing the workforce by 10%. During the Cold War, the Ethiopian government proposed replacing American-manufactured planes with Soviet models to align with the USSR, but Ethiopian Airlines, under Mohammed’s leadership, successfully resisted this change. By 1989, the airline had entered a period of prosperity, attributed largely to his leadership.

According to American writer Paul B. Henze, who met Mohammed Ahmed in 1990 at Ethiopian Airlines headquarters in Addis Ababa, he described him as among the top entrepreneurs in the developing world, who also remained loyal to his homeland of Harar. Mohammed would go on to serve as the secretary general of the African Airlines Association in 1992.

Awards & accolades 
Mohammed was presented with the African aviation award for his contribution to the advancement of Africa's airlines business in 1999.

Personal life
Mohammed enjoyed long walks and was an avid chess player. According to his former coworker Assefa Ambaye, Mohammed Ahmed was also a supporter of equal rights in the workplace for women. He leaves behind his wife Fethia Ahmed and four children.

Death 
Mohammed Ahmed died in Addis Ababa, Ethiopia, on November 26, 2024, and was laid to rest at Kolfe Muslim Cemetery. His funeral was attended by prominent individuals, including Mesin Bekele, the current CEO of Ethiopian Airlines.

See also
Ahmed Kellow

References

Ethiopian chief executives
Ethiopian businesspeople
Ethiopian business executives
Ethiopian Airlines
People of the Cold War
1932 births
Saint Louis University alumni
Stanford University alumni
Ethiopian engineers
Businesspeople in aviation
People from Harari Region
Chief executives in the airline industry
Chief operating officers
2024 deaths
Nga Lee (Sally) Ng. Nga Lee Ng is the Love Family Professor at the Georgia Institute of Technology, holding appointments in both the School of Chemical and Biomolecular Engineering and the School of Earth and Atmospheric Sciences. Her research focuses on atmospheric chemistry, particularly in the study of organic aerosols and their effects on air quality, climate, and human health.

Education and early career 
Ng earned her Bachelor of Engineering degree in Chemical and Environmental Engineering from the Hong Kong University of Science and Technology in 2002. She was an exchange student in Chemical Engineering at the University of Minnesota from 2000 to 2001. She then pursued her graduate studies at the California Institute of Technology, where she completed her M.S. in Chemical Engineering in 2004 and her Ph.D. in 2007 under the supervision of John H. Seinfeld and Richard C. Flagan.

Following her Ph.D., Ng worked as a postdoctoral scholar at the California Institute of Technology (2007-2008) and then as a postdoctoral scientist at Aerodyne Research (2008-2010). She continued at Aerodyne Research as a senior scientist from 2010 to 2011.

Research and career 
Ng joined the Georgia Tech faculty in 2011. Her research focuses on the chemistry of atmospheric aerosols, including their formation, transformation, and impacts. Her work has provided insights into the role of organic aerosols in air quality and climate change. She employs advanced analytical techniques and modeling approaches to study the sources, processes, and effects of particulate matter and other air pollutants. She was the lead principal investigator on a $12M National Science Foundation (NSF) grant awarded in 2021 to establish the Atmospheric Science and Chemistry mEasurement NeTwork (ASCENT), which aims to collect real-time measurements of atmospheric particulates' chemical composition and properties at 12 different sites around the United States. She received a Love Family endowed professorship at Georgia Tech in 2022.

Ng has held several editorial positions, including Editor-in-Chief of ACS Environmental Science & Technology Air since 2023, and she has served on the ACS Earth and Space Chemistry and Scientific Reports editorial boards.

Selected publications

Awards and honors 
 Sheldon K. Friedlander Award, American Association for Aerosol Research (2010)
 Early Career Award, Environmental Protection Agency (2013)
 Walter W. Rosenblith New Investigator Award, Health Effects Institute (2013)
National Science Foundation CAREER Award (2015)
 Kenneth T. Whitby Award, American Association for Aerosol Research (2016)
 Award from the Dreyfus Foundation Postdoctoral Program in Environmental Chemistry (2017)
 ISI Highly Cited Researcher, Clarivate Analytics (2017-2019)
 Robert W. Vaughan Lectureship, California Institute of Technology (2021)
 Ascent Award, American Geophysical Union (2023)

References 

Living people
Year of birth missing (living people)
Women chemists
Georgia Tech faculty
Alumni of the Hong Kong University of Science and Technology
California Institute of Technology alumni
Aerosol scientists
Atmospheric chemists
David W. Flaherty. David W. Flaherty is the Thomas C. Loach Jr. Endowed Professor in the School of Chemical and Biomolecular Engineering at Georgia Institute of Technology, joining in June 2023 after previously serving at the University of Illinois, Urbana-Champaign. His research focuses on catalysis, surface science, and materials synthesis aimed at sustainability.

Education and career 
 B.S. in Chemical Engineering, University of California, Berkeley
 Ph.D. in Chemical Engineering, University of Texas at Austin (advisor: Charles Buddie Mullins)
 Postdoctoral research with Prof. Enrique Iglesia at the University of California, Berkeley

Research 
Flaherty's research focuses on developing the science and application of catalysis for sustainability.

Awards and honors 

 Eastman Foundation Distinguished Lecturer in Catalysis, University of California, Berkeley (2021)
 Department of Energy Early Career Award (2019)
 National Science Foundation CAREER Award (2016)
 ACS PRF Doctoral New Investigator Award (2013)

References

External links 
 [Google Scholar Profile](https://scholar.google.com/citations?user=EULNYK8AAAAJ&hl=en)

Georgia Tech faculty
Chemical engineers
University of California, Berkeley alumni
University of Texas at Austin alumni

Year of birth missing (living people)
Living people
Aircorp Bushmaster. The Aircorp B2-N Bushmaster is a prototype Australian light aircraft designed for aerobatic, touring, and utility use. It first flew in 1989 and did not enter production.

Design and development
The Bushmaster is a high-wing, strut-braced monoplane of conventional design with fixed, tailwheel undercarriage. It has two seats, side-by-side, in an enclosed cabin. Fuselage construction is of welded steel tube, covered in fabric, and the wing is all metal. It is powered by a nose-mounted engine driving a tractor propeller. This engine was originally a Norton Aerotor 90 wankel engine, also intended to power production examples. 

The prototype, VH-BOI, first flew on 28 October 1989. Certification for the original Norton powerplant was delayed, so it was changed to a Lycoming O-235 after this first flight. The engine change necessitated some other modifications to the aircraft, including changes to the engine cowling and the undercarriage.

The Bushmaster received its Certificate of Airworthiness in late 1990. Production was to take place at Caboolture Airport. However, by early 1992, Aircorp was under financial pressure, which led one of the original partners in the company, Peter Ferro, to buy it out to continue the project.

By 1992, a range of models had been proposed, and the prototype was modified to make it comply with American FAR 23 regulations in preparation for marketing in the US. Production examples were also to have redesigned wing spars, relocated fuel tanks, wings braced with I-struts instead of the V-struts of the prototype, and three-position flaps. Flight testing of the four-seat B4-80 model was anticipated to start in late 1992.

However, by 2007, no further examples had been produced and the prototype was sold off.

Variants
B2-N
Prototype VH-BOI. First flight 28 October 1989 (1 built)
B2-16
Planned two-seat side-by-side production variant
B2-16A 
Planned variant with 2+2 seating
B3-16
Planned variant with a single seat in front, with a bench seat for two passengers behind it
B4-16
Planned four-seat variant with a stretched cabin
B4-60
Planned four-seat variant with a stretched cabin and a 119 kw (160 hp) Lycoming engine
B4-80
Planned four-seat variant with a stretched cabin and a 134 kw (180 hp) Lycoming engine

Specifications (B2-N)

References

Footnotes

Citations

Bibliography
  
 
 
 

1980s Australian civil utility aircraft
Aircorp aircraft
High-wing aircraft
Single-engined tractor aircraft
Aircraft with fixed conventional landing gear
Aircraft first flown in 1989
Single-engined piston aircraft
Butlr Technologies. Butlr Technologies is an American technology company based in San Francisco, California. It was founded by Honghao Deng and Jiani Zeng in 2019. Butlr Technologies provides software and hardware for gathering spatial intelligence. It also manufactures wireless sensors that use body heat to track location occupancy data and body movement.

History 
Butlr was founded by San Francisco-based engineers Honghao Deng and Jiani Zeng in 2019 as a spinoff of MIT Media Lab.

During the COVID-19 pandemic in 2020, Butlr retooled its technology by adding software features such as maximum occupancy and queue management to help businesses comply with pandemic-related restrictions.

Deng and Zeng were named to 2020 Forbes 30 Under 30 List in the Manufacturing & Industry category for their work with Butlr.

In November 2022, Butlr announced a partnership with real estate technology company Propstack to provide occupancy sensing technology for commercial real estate projects in India. Butlr was named one of the World Economic Forum's Technology Pioneers of 2022.

In 2022, Butlr also announced a marketing partnership with GP Pro, a division of Georgia-Pacific. Butlr also collaborated with Carrier Global Corporation to embed its technology into Carrier's cloud-based digital platform Abound.

In 2023, Butlr announced the Heatic 2, the latest edition of its mountable wireless sensor.

The World Economic Forum also selected Butlr for its Yes San Francisco program, which was created to revitalize the city's business district.

In 2024, Butlr began providing heat sensor technology and an artificial intelligence query tool named Butlr Care GPT to healthcare companies through its Butlr Care brand. Butlr also won the Sustainability Award at the 2024 Core 77 Design Awards.

Butler has an additional office in Boston, Massachusetts.

References 


Technology companies of the United States
Companies based in San Francisco
Artificial intelligence companies
2019 establishments
Norton NR642. The Norton NR642 (Originally the Aerotor 90) is a British aircraft engine that was designed and produced by Norton Motorcycle Company in the 1990s for use in light aircraft (particularly by amateur constructors) and UAVs.

Design and development
The NR642 is a twin-rotor Wankel engine. It is a  displacement petrol engine design, with a heavy-duty 2.94:1 reduction gearbox. Cooling is provided by a fan for the rotors, plus liquid cooling for the housing. It was designed to meet JAR-E and FAR 23 regulatory requirements. Norton aimed for 1,500 hours running time between overhauls but was initially specifying 200-300 hours.

The NR642 first flew in late 1989, with two units installed on a Rutan Long-EZ to create what its builder called a "Twin EZ".

Applications
Aircorp Bushmaster
Rutan Long-EZ

Specifications

See also

References

 
 
 

Norton aircraft engines
Aircraft Wankel engines
Axial loading. Axial loading is defined as applying a force on a structure directly along a given axis of said structure. In the medical field, the term refers to the application of weight or force along the course of the long axis of the body. The application of an axial load on the human spine can result in vertebral compression fractures. Axial loading takes place during the practice of head-carrying, an activity which a prospective case–control study in 2020 shows leads to "accelerated degenerative changes, which involve the upper cervical spine more than the lower cervical spine and predisposes it to injury at a lower threshold."

References 

Biomechanics
Zhu Yongjun. Zhu Yongjun (; 15 December 1929 – 8 June 2024) was a Chinese nuclear chemical specialist, and an academician of the Chinese Academy of Engineering. He was a member of the Chinese Nuclear Society.

Biography 
Zhu was born in Jing County, Anhui, on 15 December 1929. In 1947, he entered Tsinghua University, where he majored in the Department of Chemistry.

After graduation in 1951, Zhu stayed for teaching. He joined the Chinese Communist Party (CCP) in April 1955. He was promoted to associate professor in 1960 and to full professor in 1970. In 1979, he became deputy director of the Institute of Nuclear Energy Technology, and held that office until 1985.

On 8 June 2024, Zhu died in Beijing, at the age of 94.

Honours and awards 
 1993 State Natural Science Award (Third Class)
 1995 Member of the Chinese Academy of Engineering (CAE)
 1999 State Technological Invention Award (Second Class)
 1999 Science and Technology Progress Award of the Ho Leung Ho Lee Foundation

References 

1929 births
2024 deaths
People from Jing County, Anhui
Engineers from Anhui
Tsinghua University alumni
Academic staff of Tsinghua University
Members of the Chinese Academy of Engineering
20th-century Chinese engineers
21st-century Chinese engineers
United Railways (Oregon). United Railways was a railroad in Oregon. Begun as an electric interurban railway in 1911, passenger service was never effective and the road became a freight link to the Tualatin Valley. The company was dissolved in 1944, but the railroad line remains active.

History
Initially built as an interurban electric railway, the main line opened on April 16, 1911 between Portland and Wilkesboro. Unusual for interurbans, the line featured a long  tunnel beneath Cornelius Pass. The company had a close working relationship with the Oregon Electric Railway. As such, when the Oregon Electric changed their electrification voltage in 1912, United Railways implemented the same system. Service south of Linnton was suspended in 1915 amid a fare dispute, necessitating passengers wishing to continue to Portland to transfer to mainline Spokane, Portland and Seattle Railway trains. As passenger traffic declined, the company looked to local lumber processors to support business. Additional branch railroads were built from Wilkesboro in 1920 which facilitated the increased freight business. The Gales Creek and Wilson River Railroad built a line west to Glenwood and, after a failed attempt to purchase UR, interchanged freight. The Portland, Astoria and Pacific Railroad further built a route north to Keasey and began leasing the United Railways line. While the line was initially planned to extend to Tillamook, the only extension beyond Wilkesboro was in the 1920s when rails were run to Banks. Passenger service ceased after January 18, 1923. The railroad continued to operate as a freight line, but the electrification system was removed in favor of diesel locomotives. The company interchanged logs on disconnected trucks. The SP&S purchased and dissolved the company outright in 1944. The main line persisted as a freight line, eventually passing into the ownership of Portland and Western Railroad.

See also
Holcomb Creek Trestle

References

Bibliography
 
 
 

History of transportation in Oregon
Defunct Oregon railroads
Transportation in Portland, Oregon
Predecessors of the Burlington Northern Railroad
Railway companies established in 1906
Railway lines opened in 1911
Railway companies disestablished in 1944
Interurban railways in Oregon
Electric railways in Oregon
1906 establishments in Oregon
600 V DC railway electrification
1200 V DC railway electrification
RFNS Puamau. RFNS Puamau (402) is a  donated to Fiji (for the Fijian Navy) by Australia as part of the Pacific Patrol Boat Replacement Project. The vessel entered service on 7 March 2024. The ship is used to patrol Fijian waters.

Design and description
Puamau is a , a design based on previous patrol boat types constructed by Austal for Australia. The vessel is  long overall with a beam of  and a draft of  when loaded. Puamau is powered by two Caterpillar 3516C diesel engines with two ZF7600 gearboxes turning two fixed pitch propellers creating . The ship has a maximum speed of  and a range of  at . The ship has berths for up to 23 crew and is equipped with one fast rescue rigid-inflatable boat with two  Yamaha engines capable of operating with up to 15 people aboard. There is a  cargo deck serviced by a crane and is fitted for but not equipped with an autocannon of up to  and a 0.50-calibre machine gun on both the port and starboard sides of the ship.

Construction and career
Australia ordered the Guardian-class patrol boats as part of the Pacific Patrol Boat Replacement Project, an Australian government initiative to provide patrol vessels to the surrounding island nations of the Pacific. Twenty-two ships were ordered in all, and Fiji received its first vessel,  in 2020. Puamau was the nineteenth vessel constructed under the program, at Austal's shipyard in Henderson, Australia. The future crew of Puamau left Fiji on 2 January 2024 aboard  for training on the new ship. Puamau was delivered to Australia on 7 March, who then gifted the vessel to the government of Fiji and the Fijian Navy with Fijian Prime Minister Sitiveni Rabuka in attendance. Puamau sailed for Fiji, arriving on 4 May.

Grounding
On 11 June 2024, Puamau grounded on a reef at Fulaga Island during its maiden voyage. No one was hurt in the grounding and Australia aided in the salvage of the ship. It is the fourth Guardian-class patrol boat to suffer serious damage, with the Samoan  running aground in August 2021 and subsequently being found to be beyond economical repair, replaced by . Vanuatu's  and Tuvalu's  were damaged when two cyclones hit Vanuatu in March 2023. While Takuare was being repaired in Cairns, Tuvalu was scheduled to receive a replacement boat for Te Mataili II.

On 11 October 2024, Fiji's Minister for Home Affairs, Pio Tikoduadua, announced that it would be decommissioned. As replacement, , another Guardian-class boat, was commissioned and given over to Fiji.

References

Guardian class patrol vessels
2024 ships
Ships of the Fijian Navy
Maritime incidents in 2024