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Michael Mallary
Michael L. Mallary is an engineer, physicist, inventor, and author who is noted for his contributions in the areas of magnetic recording and data storage on hard disk drives (HDD). His work has concentrated on developing and optimizing magnetic components to maximize data storage density. In particular, he is responsible to inventing the 'trailing-shield' write head used universally in modern HDDs. Mallary is a Fellow of the Institute of Electrical and Electronics Engineers and recipient of the IEEE Magnetics Society Achievement Award. Background and education Michael (Mike) Mallary, born May 6, 1945, was raised in Berkeley, California. His mother was an advertising executive and his father was the sculptor Robert Mallary. He attended schools in Los Angeles, California and New York City. He attended Archbishop Stepinac High School where he built a Jacob's Ladder (electrical), Jacob's Ladder and a crude electron microscope as science projects. Mallary received the S.B. deg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Rochelle, New York
New Rochelle ( ; in ) is a Political subdivisions of New York State#City, city in Westchester County, New York, Westchester County, New York (state), New York, United States. It is a suburb of New York City, located approximately from Midtown Manhattan. In 2020, the city had a population of 79,726, making it the 7th-largest city and 22nd-most populous municipality in New York. History 17th and 18th centuries This area was occupied by cultures of indigenous peoples for thousands of years. They made use of the rich resources of Long Island Sound and inland areas. By the 17th century, the historic Lenape bands, who spoke a language in the Algonquian family, were prominent in the area. Their territory extended from the coastal areas of western present-day Connecticut, Long Island and south through New Jersey, Maryland and Delaware. In 1654, the Siwanoy Indians, a band of Lenape (also known as the Delaware by English colonists), sold land to English settler Thomas Pell. So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massachusetts Institute Of Technology
The Massachusetts Institute of Technology (MIT) is a Private university, private research university in Cambridge, Massachusetts, United States. Established in 1861, MIT has played a significant role in the development of many areas of modern technology and science. In response to the increasing Technological and industrial history of the United States, industrialization of the United States, William Barton Rogers organized a school in Boston to create "useful knowledge." Initially funded by a land-grant universities, federal land grant, the institute adopted a Polytechnic, polytechnic model that stressed laboratory instruction in applied science and engineering. MIT moved from Boston to Cambridge in 1916 and grew rapidly through collaboration with private industry, military branches, and new federal basic research agencies, the formation of which was influenced by MIT faculty like Vannevar Bush. In the late twentieth century, MIT became a leading center for research in compu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Disk Read-and-write Head
A disk read-and-write head is the small part of a disk drive that moves above the disk platter and transforms the platter's magnetic field into electric current (reads the disk) or, vice versa, transforms electric current into magnetic field (writes the disk). The heads have gone through a number of changes over the years. In a hard drive, the heads ''fly'' above the disk surface with clearance of as little as 3 nanometres. The flying height has been decreasing with each new generation of technology to enable higher areal density. The flying height of the head is controlled by the design of an air bearing etched onto the disk-facing surface of the ''slider''. The role of the air bearing is to maintain the flying height constant as the head moves over the surface of the disk. The air bearings are carefully designed to maintain the same height across the entire platter, despite differing speeds depending on the head distance from the center of the platter. If the head hit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RA90
The RA90 disk drive was the first Digital Equipment Corporation drive to be based on "thin film" technology. Prior to the RA90 all Digital disk drives used "oxide" disks, which were an aluminum disk coated with a polyurethane binder resin containing gamma ferric oxide particles as the recording medium. The 1988-released RA90, which held 1.2GB, was used with controllers implementing the Mass Storage Control Protocol. Overview The RA90 disk drive, in addition to being DEC's first step into ''thin film'' technology, also introduced another first for ''DEC''": ''Storage Arrays''. Their first was the ''SA600 Storage Array'', which had 4 or 8 drives. Other models were the SA550 and SA650 ''Mixed Storage Array''s, combining RA70s with RA82s (SA550) or RA90s (SA650). The SA482 used just RA82s instead of RA90s. Replacing the 1.2GB RA90s with 1.5GB RA92s, an ''SA800 Storage Array'' held 12GB. History The technology was pioneered by Ampex Corporation in Redwood City, California based on a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrewsbury, Massachusetts
Shrewsbury (/ˈʃruzberi/ ''SHROOZ-bury'') is a town in Worcester County, Massachusetts, United States. The population was 38,325 according to the 2020 United States census, in nearly 15,000 households. Incorporated in 1727, Shrewsbury prospered in the 19th century due to its proximity to Worcester, Massachusetts, Worcester, and from visitors to Lake Quinsigamond. The town is governed under the New England representative town meeting system, headed by the Town Manager and five-member elected Select Board. History The Town of Shrewsbury, named for Shrewsbury, England, is a community with an uneven and hilly terrain cut by a number of minor streams providing several small water power sites. Grants of land were made in what would eventually be the town beginning in 1664, with the grant called Haynes Farm as the largest. In 1664 Native American leader, Peter Jethro, and other Nipmuc Indians deeded land around Lake Quinsigamond to settlers in the area.Barry, William, ''A History of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trailing Shield Write Head
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Trailing can mean, among others: * Facing and trailing, in railroads * The act of using a Trailer (promotion) * Trailing wheel * Trailing arm * Trailing edge * Hound trailing * Trailing twelve months Trailing twelve months (TTM) is a measurement of a company's financial performance (income and expenses) used in finance. It is measured by using the income statements from a company's reports (such as interim, quarterly or annual reports), to ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Separation
Magnetic separation is the process of separating components of mixtures by using a magnet to attract magnetic substances. The process that is used for magnetic separation separates non-magnetic substances from those which are magnetic. This technique is useful for the select few minerals which are ferromagnetic (iron-, nickel-, and cobalt-containing minerals) and paramagnetic. Most metals, including gold, silver and aluminum, are nonmagnetic. A large diversity of mechanical means are used to separate magnetic materials. During magnetic separation, magnets are situated inside two separator drums which bear liquids. Due to the magnets, magnetic particles are being drifted by the movement of the drums. This can create a magnetic concentrate (e.g. an ore concentrate). History Michael Faraday discovered that when a substance is put in a magnetic environment, the intensity of the environment is modified by it. With this information, he discovered that different materials can be sepa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Fusion
Nuclear fusion is a nuclear reaction, reaction in which two or more atomic nuclei combine to form a larger nuclei, nuclei/neutrons, neutron by-products. The difference in mass between the reactants and products is manifested as either the release or absorption (electromagnetic radiation), absorption of energy. This difference in mass arises as a result of the difference in nuclear binding energy between the atomic nuclei before and after the fusion reaction. Nuclear fusion is the process that powers all active stars, via many Stellar nucleosynthesis, reaction pathways. Fusion processes require an extremely large Lawson criterion, triple product of temperature, density, and confinement time. These conditions occur only in Stellar core, stellar cores, advanced Nuclear weapon design, nuclear weapons, and are approached in List of fusion experiments, fusion power experiments. A nuclear fusion process that produces atomic nuclei lighter than nickel-62 is generally exothermic, due t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superconducting Magnets
A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger electric currents than ordinary wire, creating intense magnetic fields. Superconducting magnets can produce stronger magnetic fields than all but the strongest non-superconducting electromagnets, and large superconducting magnets can be cheaper to operate because no energy is dissipated as heat in the windings. They are used in MRI instruments in hospitals, and in scientific equipment such as NMR spectrometers, mass spectrometers, fusion reactors and particle accelerators. They are also used for levitation, guidance and propulsion in a magnetic levitation (maglev) railway system being constructed in Japan. Construction Cooling During operation, the magnet windings must be cooled below their critical temperature, the temperat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waltham, Massachusetts
Waltham ( ) is a city in Middlesex County, Massachusetts, United States, and was an early center for the labor movement as well as a major contributor to the Technological and industrial history of the United States, American Industrial Revolution. The original home of the Boston Manufacturing Company, the city was a prototype for 19th century industrial city planning, spawning what became known as the Waltham-Lowell system of labor and production. The city is now a center for research and higher education as home to Brandeis University and Bentley University. The population was 65,218 at the 2020 United States census. Waltham is part of the Greater Boston area and lies west of Downtown Boston. Waltham has been called "watch city" because of its association with the watch industry. Waltham Watch Company opened its factory in Waltham in 1854 and was the first company to make watches on an assembly line. It won the gold medal in 1876 at the Philadelphia Centennial Exposition. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rutherford Laboratory
The Rutherford Appleton Laboratory (RAL) is one of the national scientific research laboratories in the UK operated by the Science and Technology Facilities Council (STFC). It began as the Rutherford High Energy Laboratory, merged with the Atlas Computer Laboratory in 1975 to create the Rutherford Lab; then in 1979 with the Appleton Laboratory to form the current laboratory. It is located on the Harwell Science and Innovation Campus at Chilton near Didcot in Oxfordshire, United Kingdom. It has a staff of approximately 1,200 people who support the work of over 10,000 scientists and engineers, chiefly from the university research community. The laboratory's programme is designed to deliver trained manpower and economic growth for the UK as the result of achievements in science. History RAL is named after the physicists Ernest Rutherford and Edward Appleton. The National Institute for Research in Nuclear Science (NIRNS) was formed in 1957 to operate the Rutherford High Energy L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank J
Frank, FRANK, or Franks may refer to: People * Frank (given name) * Frank (surname) * Franks (surname) * Franks, a Germanic people in late Roman times * Franks, a term in the Muslim world for all western Europeans, particularly during the Crusades Currency * Liechtenstein franc or frank, the currency of Liechtenstein since 1920 * Swiss franc or frank, the currency of Switzerland since 1850 * Westphalian frank, currency of the Kingdom of Westphalia between 1808 and 1813 * The currencies of the German-speaking cantons of Switzerland (1803–1814): ** Appenzell frank ** Aargau frank ** Basel frank ** Berne frank ** Fribourg frank ** Glarus frank ** Graubünden frank ** Luzern frank ** Schaffhausen frank ** Schwyz frank ** Solothurn frank ** St. Gallen frank ** Thurgau frank ** Unterwalden frank ** Uri frank ** Zürich frank Places * Frank, Alberta, Canada, an urban community, formerly a village * Franks, Illinois, United States, an unincorporated community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
