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Topic Review
Shaft Mining
Shaft mining or shaft sinking is excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom. Shallow shafts, typically sunk for civil engineering projects differ greatly in execution method from deep shafts, typically sunk for mining projects. When the top of the excavation is the ground surface, it is referred to as a shaft; when the top of the excavation is underground, it is called a winze or a sub-shaft. Small shafts may be excavated upwards from within an existing mine as long as there is access at the bottom, in which case they are called Raises. A shaft may be either vertical or inclined (between 45 and 90 degrees to the horizontal), although most modern mine shafts are vertical. If access exists at the bottom of the proposed shaft and ground conditions allow then raise boring may be used to excavate the shaft from the bottom up, such shafts are called borehole shafts. Shaft sinking is one of the most difficult of all development methods: restricted space, gravity, groundwater and specialized procedures make the task quite formidable. Historically mine shaft sinking has been among the most dangerous of all the mining occupations and the preserve of mining contractors called sinkers. Today shaft sinking contractors are concentrated in Canada , Germany and South Africa .
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  • 17 Nov 2022
Biography
Glen Edwards
Glen Edwards (March 5, 1918 – June 5, 1948) was a test pilot for the United States Air Force , and is the namesake of Edwards Air Force Base. Edwards was born March 5, 1918, in Medicine Hat, Alberta, Canada, where he lived until 1931. At age 13, his parents moved the family to California , settling in Lincoln, northeast of Sacramento. After graduating with a Bachelor of Science degree
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Biography
Barys Kit
Boris Uladzimiravich Kit (Belarusian: Бары́с Уладзімеравіч Кіт, Russian: Бори́с Влади́мирович Кит; April 6, 1910 – February 1, 2018) was a Belarusian-American rocket scientist. Kit was born on April 6, 1910 in Saint Petersburg, Russian Empire to the family of an employee at the Post and Telegraph Department of Belarusian origin. His true surname i
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Biography
Anousheh Ansari
Anousheh Ansari (Persian: Anuŝe Ansāri‎; née Raissyan;[1] born September 12, 1966) is an Iranian-American engineer and co-founder and chairwoman of Prodea Systems. Her previous business accomplishments include serving as co-founder and CEO of Telecom Technologies, Inc. (TTI). The Ansari family is also the title sponsor of the Ansari X Prize. On September 18, 2006, a few days after her 40th
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Biography
Murray Raney
Murray Raney (October 14, 1885 – March 3, 1966) was an United States mechanical engineer born in Carrollton, Kentucky. He was the developer of a nickel catalyst that became known as Raney nickel, which is often used in industrial processes and scientific research for the hydrogenation of multiple covalent bonds present in molecules. Raney was born in Carrollton, Kentucky, to William Wallace
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Topic Review
Caproni Ca.3 (1916)
The Caproni Ca.3 was an Italian heavy bomber of World War I and the postwar era. It was the definitive version of the series of aircraft that began with the Caproni Ca.1 in 1914.
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Topic Review
Video Super Resolution
Video Super Resolution is the process of generating high-resolution video frames from the given low-resolution ones. The main goal is to restore more fine details, while saving coarse ones. There are many approaches for this task, but it's still popular and challenging problem.
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Topic Review
Regenerative Brake
Regenerative braking is an energy recovery mechanism that slows down a moving vehicle or object by converting its kinetic energy into a form that can be either used immediately or stored until needed. In this mechanism, the electric traction motor uses the vehicle's momentum to recover energy that would otherwise be lost to the brake discs as heat. This contrasts with conventional braking systems, where the excess kinetic energy is converted to unwanted and wasted heat due to friction in the brakes, or with rheostatic brakes, where the energy is recovered by using electric motors as generators but is immediately dissipated as heat in resistors. In addition to improving the overall efficiency of the vehicle, regeneration can significantly extend the life of the braking system as the mechanical parts will not wear out very quickly.
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Topic Review
Fundamentals of Microwave Technology in Catalyst Production
The fundamentals and mechanisms of microwave irradiation are fundamentals of microwave technology. Two mechanisms of the microwave technology, electric field and magnetic field heating, which make microwave irradiation unique and potentially viable in numerous fields are included as well. These aspects are essential to be understood prior to investigating microwave-absorbing catalysts for the production of biofuel. With the outstanding benefit of microwave heating, the active sites of catalysts or entire catalysts can be heated selectively to enhance the catalytic performance. In the case of microwave-unabsorbing material, selective heating of the catalyst will result in heat transfer to organic solvents and eventually increases the conversion yield. The kinetic rate by microwave irradiation was higher than conventional heating by 1.15 times.
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Topic Review
Fabrication of Nanobottle Motor
Micro/nano-motors play an important role in energy, environment, and biomedicines. Nanobottles attract great attention due to their distinct advantages of a large cavity, high specific surface area, bionic streamline structure, and chemotactic motion. 
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