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Air Purification
An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke. The commercially graded air purifiers are manufactured as either small stand-alone units or larger units that can be affixed to an air handler unit (AHU) or to an HVAC unit found in the medical, industrial, and commercial industries. Air purifiers may also be used in industry to remove impurities from air before processing. Pressure swing adsorbers or other adsorption techniques are typically used for this. History In 1830, a patent was awarded to Charles Anthony Deane for a device comprising a copper helmet with an attached flexible collar and garment. A long leather hose attached to the rear of the helmet was to be used to supply air, the original concept being that it would be pumped using a double bello ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longman
Longman, also known as Pearson Longman, is a publishing company founded in London, England, in 1724 and is owned by Pearson PLC. Since 1968, Longman has been used primarily as an imprint by Pearson's Schools business. The Longman brand is also used for the Longman Schools in China and the ''Longman Dictionary''. History Beginnings The Longman company was founded by Thomas Longman (1699 – 18 June 1755), the son of Ezekiel Longman (died 1708), a gentleman of Bristol. Thomas was apprenticed in 1716 to John Osborn, a London bookseller, and at the expiration of his apprenticeship married Osborn's daughter. In August 1724, he purchased the stock and household goods of William Taylor, the first publisher of '' Robinson Crusoe'', for 9s 6d. Taylor's two shops in Paternoster Row, London, were known respectively as the '' Black Swan'' and the ''Ship'', premises at that time having signs rather than numbers, and became the publishing house premises. Longman entered into pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollen
Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of gymnosperms. If pollen lands on a compatible pistil or female cone, it germinates, producing a pollen tube that transfers the sperm to the ovule containing the female gametophyte. Individual pollen grains are small enough to require magnification to see detail. The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics. Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination. In a case of self-pollination, this process takes place from the an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dust
Dust is made of fine particles of solid matter. On Earth, it generally consists of particles in the atmosphere that come from various sources such as soil lifted by wind (an aeolian process), volcanic eruptions, and pollution. Dust in homes is composed of about 20–50% dead skin cells. The rest, and in offices, and other human environments is composed of small amounts of plant pollen, human hairs, animal fur, textile fibers, paper fibers, minerals from outdoor soil, burnt meteorite particles, and many other materials which may be found in the local environment. Atmospheric Atmospheric or wind-borne fugitive dust, also known as ''aeolian dust'', comes from arid and dry regions where high velocity winds are able to remove mostly silt-sized material, deflating susceptible surfaces. This includes areas where grazing, ploughing, vehicle use, and other human behaviors have further destabilized the land, though not all source areas have been largely affected by an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IQAir
IQAir is a Swiss air quality technology company, specializing in protection against airborne pollutants, developing air quality monitoring and air cleaning products. IQAir also operates AirVisual, a real-time air quality information platform. As of February 2020, it had around 500 employees worldwide, 150 of them in China, and its most important markets were Asia and North America. History IQAir was founded 1963 by brothers Manfred and Klaus Hammes, who introduced an air filter system for residential coal ovens in Germany to help reduce black dust build-up on the walls behind ovens. Manfred Hammes, a lifelong asthma sufferer, noticed that the filter reduced his flare-ups during the winter months. Klaus Hammes continued through the 1960s and ’70s to adapt the air filter for other heating systems such as radiators, baseboard heating and forced-air heating and cooling systems. In 1982, Klaus Hammes relocated the company headquarters to Switzerland. In the early 1990s, Frank Hamm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Architectural Design
Building design refers to the broadly based architectural, engineering and technical applications to the design of buildings. All building projects require the services of a building designer, typically a licensed architect. Smaller, less complicated projects often do not require a licensed professional, and the design of such projects is often undertaken by building designers, draftspersons, interior designers (for interior fit-outs or renovations), or contractors. Larger, more complex building projects require the services of many professionals trained in specialist disciplines, usually coordinated by an architect. Occupations Architect An architect is a person trained in the planning, design and supervision of the construction of buildings. Professionally, an architect's decisions affect public safety, and thus an architect must undergo specialized training consisting of advanced education and a practicum (or internship) for practical experience to earn a license to practic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jefferson, North Carolina
Jefferson is a town in and the county seat of Ashe County, North Carolina, United States. The population was 1,611 at the 2010 census. History The North Carolina General Assembly created a special commission in 1799 to found a county seat for Ashe County. The commission purchased of land to form the town of Jeffersonton, later named Jefferson. It is one of the first towns in the nation to bear the name of Thomas Jefferson, who was the vice president of the United States in 1799. The Ashe County Courthouse and Poe Fish Weir are listed on the National Register of Historic Places. Geography Jefferson is located at in the Appalachian Mountains. According to the United States Census Bureau, the town has a total area of , of which , or 0.20%, is water. The New River, which is part of the Ohio River watershed and one of the oldest and most scenic rivers in the eastern United States, flows through the town. Climate Demographics 2020 census As of the 2020 United States census, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McFarland & Company
McFarland & Company, Inc., is an American independent book publisher based in Jefferson, North Carolina, that specializes in academic and reference works, as well as general-interest adult nonfiction. Its president is Rhonda Herman. Its former president and current editor-in-chief is Robert Franklin, who founded the company in 1979. McFarland employs a staff of about 50, and had published 7,800 titles. McFarland's initial print runs average 600 copies per book. Subject matter McFarland & Company focuses mainly on selling to libraries. It also utilizes direct mailing to connect with enthusiasts in niche categories. The company is known for its sports literature, especially baseball history, as well as books about chess, military history, and film. In 2007, the ''Mountain Times'' wrote that McFarland publishes about 275 scholarly monographs and reference book titles a year; Robert Lee Brewer reported in 2015 that the number is about 350. List of scholarly journals The follow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thousand Oaks, California
Thousand Oaks is the second-largest city in Ventura County, California, United States. It is in the northwestern part of Greater Los Angeles, approximately from the city of Los Angeles and from Downtown. It is named after the many oak trees present in the area. The city forms the central populated core of the Conejo Valley. Thousand Oaks was incorporated in 1964, but has since expanded to the west and east. Two-thirds of master-planned community of Westlake and most of Newbury Park were annexed by the city during the late 1960s and 1970s. The Los Angeles County–Ventura County line crosses at the city's eastern border with Westlake Village. The population was 126,966 at the 2020 census, up from 126,683 at the 2010 census. Etymology One of the earliest names used for the area was Conejo Mountain Valley, as used by the founder of Newbury Park, Egbert Starr Newbury, in the 1870s. During the 1920s, today's Thousand Oaks was home to 100 residents. In the 1920s came tal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAGE Publishing
SAGE Publishing, formerly SAGE Publications, is an American independent publishing company founded in 1965 in New York by Sara Miller McCune and now based in Newbury Park, California. It publishes more than 1,000 journals, more than 800 books a year, reference works and electronic products covering business, humanities, social sciences, science, technology and medicine. SAGE also owns and publishes under the imprints of Corwin Press (since 1990), CQ Press (since 2008), Learning Matters (since 2011), and Adam Matthew Digital (since 2012). History SAGE was founded in 1965 in New York City by Sara Miller (later Sara Miller McCune) with Macmillan Publishers executive George D. McCune as a mentor; the name of the company is an acronym formed from the first letters of their given names. SAGE relocated to Southern California in 1966, after Miller and McCune married; McCune left Macmillan to formally join the company at that time. Sara Miller McCune remained president for 18 years ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioactive Decay
Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay ( ), beta decay ( ), and gamma decay ( ), all of which involve emitting one or more particles. The weak force is the mechanism that is responsible for beta decay, while the other two are governed by the electromagnetism and nuclear force. A fourth type of common decay is electron capture, in which an unstable nucleus captures an inner electron from one of the electron shells. The loss of that electron from the shell results in a cascade of electrons dropping down to that lower shell resulting in emission of discrete X-rays from the transitions. A common example is iodine-125 commonly used in medical settings. Radioactive decay is a stochastic (i.e. random) pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manhattan Project
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers. Nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the actual bombs. The Army component of the project was designated the Manhattan District as its first headquarters were in Manhattan; the placename gradually superseded the official codename, Development of Substitute Materials, for the entire project. Along the way, the project absorbed its earlier British counterpart, Tube Alloys. The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion (equivalent to about $ billion in ). Over 90 percent of the cost was for building factories an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
