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PDMS Etching Scheeme
PDMS may refer to: * Palm Desert Middle School, a middle school in Palm Desert, California * Plant Design Management System * Plasma desorption mass spectrometry * Point-Defence Missile System * Polydimethylsiloxane Polydimethylsiloxane (PDMS), also known as dimethylpolysiloxane or dimethicone, is a silicone polymer with a wide variety of uses, from cosmetics to industrial lubrication and passive daytime radiative cooling. PDMS is particularly known for its ..., a silicon-based organic polymer {{disambig ja:艦対空ミサイル#個艦防空ミサイル ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palm Desert Middle School
The Desert Sands Unified School District (DSUSD) is a public school district with main offices located in La Quinta, California. The district was founded in 1964, after the California Department of Education consolidated all Indio public schools. As of 2017, DSUSD serves 28,958 students in Indio, La Quinta, Palm Desert, Indian Wells, Bermuda Dunes, and parts of Rancho Mirage and Coachella. History In the 1930s and 1940s, Indio Public Schools consisted of Washington, Roosevelt, Jackson, Lincoln and Hoover schools, with the Jefferson school the sole junior high-level facility. In 1966, voters approved the consolidation of the Indio Elementary School District and the Coachella Valley Joint Union High School District, with some smaller elementary districts, into one, 760 square mile, district called Desert Sands Unified School District. The district initially served about 6,600 students. In 2010, using funds provided by the Magnet Schools Assistance Program, two elementary sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Design Management System
PDMS (Plant Design Management System) as it is known in the 3D CAD industry, is a customizable, multi-user and multi-discipline, engineer controlled design software package for engineering, design and construction projects in offshore and onshore. The Computer-Aided Design Centre (or CADCentre as it was more commonly referred to, and later formally became) was created in Cambridge, England, UK in 1967 by the UK Ministry of Technology. Its mission was to develop computer-aided design techniques and promote their take-up by British industry. The centre carried out much pioneering CAD research, and many of its early staff members went on to become prominent in the worldwide CAD community, such as brothers Dick Newell and Martin Newell. Dick Newell oversaw the creation of the Plant Design Management System (PDMS) for 3D process plant design. He later co-founded two software companies – Cambridge Interactive Systems (CIS) which was known for its Medusa 2D/3D CAD system, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasma Desorption Mass Spectrometry
An ion source is a device that creates atomic and molecular ions. Ion sources are used to form ions for mass spectrometers, optical emission spectrometers, particle accelerators, ion implanters and ion engines. Electron ionization Electron ionization is widely used in mass spectrometry, particularly for organic molecules. The gas phase reaction producing electron ionization is :M + e^- -> M^ + 2e^- where M is the atom or molecule being ionized, e^- is the electron, and M^ is the resulting ion. The electrons may be created by an arc discharge between a cathode and an anode. An electron beam ion source (EBIS) is used in atomic physics to produce highly charged ions by bombarding atoms with a powerful electron beam. Its principle of operation is shared by the electron beam ion trap. Electron capture ionization Electron capture ionization (ECI) is the ionization of a gas phase atom or molecule by attachment of an electron to create an ion of the form A−•. The re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Point-Defence
Point defence (or point defense; see spelling differences) is the defence of a single object or a limited area, e.g. a ship, building or an airfield, now usually against air attacks and guided missiles. Point defence weapons have a smaller range in contrast to area-defence systems and are placed near or on the object to be protected. Point defence may include: * short-ranged interceptor aircraft * Close-in weapon systems on ship * land-based short-ranged anti-aircraft guns or surface-to-air missile systems * Active protection systems on tanks or other armoured fighting vehicles Coastal artillery to protect harbours is similar conceptually, but is generally not classified as point defence. Similarly, passive systems—electronic countermeasures, decoys, chaff, flares, barrage balloons—are not considered point defence. Examples Aircraft * Bachem Ba 349 ''Natter'' – vertical take-off rocket powered crewed interceptor (prototypes only) * Convair XF-92 – Later used as testb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polydimethylsiloxane
Polydimethylsiloxane (PDMS), also known as dimethylpolysiloxane or dimethicone, is a silicone polymer with a wide variety of uses, from cosmetics to industrial lubrication and passive daytime radiative cooling. PDMS is particularly known for its unusual rheological (or flow) properties. It is optically clear and, in general, inert, non-toxic, and non-flammable. It is one of several types of silicone oil (polymerized siloxane). The applications of PDMS range from contact lenses and medical devices to elastomers; it is also present in shampoos (as it makes hair shiny and slippery), food ( antifoaming agent), caulk, lubricants and heat-resistant tiles. Structure The chemical formula of PDMS is , where ''n'' is the number of repeating monomer units. Industrial synthesis can begin from dimethyldichlorosilane and water by the following net reaction: : + (''n''+1) The polymerization reaction evolves hydrochloric acid. For medical and domestic applications, a process wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parliamentary Document Management System
In modern politics and history, a parliament is a legislative body of government. Generally, a modern parliament has three functions: representing the electorate, making laws, and overseeing the government via hearings and inquiries. The term is similar to the idea of a senate, synod or congress and is commonly used in countries that are current or former monarchies. Some contexts restrict the use of the word ''parliament'' to parliamentary systems, although it is also used to describe the legislature in some presidential systems (e.g., the Parliament of Ghana), even where it is not in the Legal name, official name. Historically, parliaments included various kinds of deliberative, consultative, and judicial assemblies. What is considered to be the first modern parliament, was the Cortes of León, held in the Kingdom of León in 1188. According to the UNESCO, the Decreta of Leon of 1188 is the oldest documentary manifestation of the European parliamentary system. In addi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
