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Reeds
Reed or Reeds may refer to: Science, technology, biology, and medicine * Reed bird (other) * Reed pen, writing implement in use since ancient times * Reed (plant), one of several tall, grass-like wetland plants of the order Poales * Reed reaction, in chemistry * Reed receiver, an outdated form of multi-channel signal decoding * Reed relay, one or more reed switches controlled by an electromagnet * Reed switch, an electrical switch operated by an applied magnetic field * Reed valve, restricts the flow of fluids to a single direction * Reed (weaving), a comb like tool for beating the weft when weaving * Reed's law, describes the utility of large networks, particularly social networks * Reed–Solomon error correction, a systematic way of building codes that can be used to detect and correct multiple random symbol errors * Reed–Sternberg cell, related to Hodgkin's disease Organizations * Reed (company), offering employment-related services (UK) * Reed and Stem, former ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reeds Jewelers
Reeds Jewelers is a U.S. retail jewelry company founded in 1946 by Bill and Roberta Zimmer in Wilmington, North Carolina Wilmington is a port city in New Hanover County, North Carolina, United States. With a population of 115,451 as of the 2020 United States census, 2020 census, it is the List of municipalities in North Carolina, eighth-most populous city in the st .... Reeds Jewelers sells diamonds and precious gems, fine jewelry, brand-name watches, Pandora charms, Swarovski crystal, and jewelry accessories in its chain of retail stores primarily located in shopping malls and its online store Reeds.com. In May 2008, " National Jeweler" magazine listed Reeds Jewelers as the ninth largest North American Retail Jewelry chain."State of the Majors", National Jeweler, May 16, 2008, pp 9 and 44. History The company started in 1946 when Bill Zimmer and his wife, Roberta, bought a small downtown jewelry store in Wilmington, North Carolina and changed the name to Reeds Jewelers. Late ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed Receiver
A reed receiver or tuned reed receiver (US) was a form of multi-channel signal decoder used for early radio control systems. It uses a simple electromechanical device or '' 'resonant reed' '' to demodulate the signal, in effect a receive-only modem. The encoding used is a simple form of frequency-shift keying. These decoders appeared in the 1950s and were used into the early 1970s. Early transistor systems were in use in parallel to them, but they were finally displaced by the appearance of affordable digital proportional systems, based on early integrated circuits. These had the advantage of proportional control. Operation The decoder of the reed receiver is based on the 'resonant reed' unit. This comprises a number of vibrating metal reeds, each one having a tuned vibration frequency like a tuning fork. These reeds are manufactured from a single tapered sheet of iron or steel, giving a comb of reeds of varying length. This resembles the comb used to sound musical notes in a m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed (weaving)
A reed is part of a weaving loom, and resembles a comb or a frame with many vertical slits. It is used to separate and space the warp threads, to guide the shuttle's motion across the loom, and to push the weft threads into place."Reed." ''The Oxford English Dictionary''. 2nd ed. 1989.1911 Encyclopædia Britannica In most floor looms with, the reed is securely held by the beater. Floor looms and mechanized looms both use a beater with a reed, whereas Inkle weaving and tablet weaving do not use reeds. History Modern reeds are made by placing flattened strips of wire (made of carbon or stainless steel) between two half round ribs of wood, and binding the whole together with tarred string. Historically, reeds were made of reed or split cane. The split cane was then bound between ribs of wood in the same manner as wire is now. In 1738, John Kay replaced split cane with flattened iron or brass wire, and the change was quickly adopted. To make a reed, wire is flattened to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed Switch
The reed switch is an Electromechanics, electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Peter the Great St. Petersburg Polytechnic University#Soviet era, Petrograd Electrotechnical University, and later evolved at Bell Labs, Bell Telephone Laboratories in 1936 by Walter B. Ellwood into the reed relay. In its simplest and most common form, it consists of a pair of Ferromagnetism, ferromagnetic flexible metal Electrical contacts, contacts in a hermetic seal, hermetically sealed glass envelope. The contacts are usually normally open, closing when a magnetic field is present, or they may be normally closed and open when a magnetic field is applied. The switch may be actuated by an electromagnetic coil, making a reed relay, or by bringing a permanent magnet near it. When the magnetic field is removed, the contacts in the reed switch return to their original position. The "reed" is the metal part inside t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed (plant)
Reed is a common name for several tall, grass-like plants of wetlands. Varieties They are all members of the order Poales (in the modern, expanded circumscription), and include: In the grass family, Poaceae * Common reed ('' Phragmites australis''), the original species named reed * Giant reed ('' Arundo donax''), used for making reeds for musical instruments * Burma reed ('' Neyraudia reynaudiana'') * Reed canary-grass ('' Phalaris arundinacea'') * Reed sweet-grass ('' Glyceria maxima'') * Small-reed ('' Calamagrostis'' species) In the sedge family, Cyperaceae * Paper reed or papyrus (''Cyperus papyrus''), the source of the Ancient Egyptian writing material, also used for making boats In the family Typhaceae * Bur-reed ('' Sparganium'' species) * Reed-mace (''Typha'' species), also called bulrush or cattail In the family Restionaceae * Cape thatching reed ('' Elegia tectorum''), a restio originating from the South-western Cape, South Africa. * Thatching reed ('' Thamno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed Relay
A reed relay is a type of relay that uses an electromagnet to control one or more reed switches. The contacts are of magnetic material and the electromagnet acts directly on them without requiring an armature to move them. Sealed in a long, narrow glass tube, the contacts are protected from corrosion. The glass envelope may contain multiple reed switches or multiple reed switches can be inserted into a single bobbin and actuate simultaneously. Reed switches have been manufactured since the 1930s. Compared with armature-based relays, reed relays can switch much faster, as the moving parts are small and lightweight, although switch bounce is still present. Also, they require less operating power and have lower contact capacitance. Their current handling capacity is limited but, with appropriate contact materials, they are suitable for "dry" switching applications. They are mechanically simple, making for reliability and long life. Memory device A few million reed relays were used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed Valve
Reed valves are a type of check valve which restrict the flow of fluids to a single direction, opening and closing under changing pressure on each face. Modern versions often consist of flexible metal or composite materials (fiberglass or carbon fiber). Applications Traditional Reed valves, normally a leather flap covering a hole, are amongst the earliest form of automatic flow control for liquids and gases. They have been used for thousands of years in water pumps and for hundreds of years in bellows for high-temperature forges and musical instruments such as church organs and accordions. In nature, heart valves operate in a somewhat similar fashion. Pumps Reed valves are used in some reciprocating compressor designs, and in the pumping element of some musical instruments, large and small. Two-stroke engines Reed valves are commonly used in high-performance versions of the two-stroke engine, where they control the fuel-air mixture admitted to the cylinder. As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed's Law
Reed's law is the assertion of David P. Reed that the utility of large networks, particularly social networks, can scale exponentially with the size of the network. The reason for this is that the number of possible sub-groups of network participants is 2''N'' − ''N'' − 1, where ''N'' is the number of participants. This grows much more rapidly than either * the number of participants, ''N'', or * the number of possible pair connections, ''N''(''N'' − 1)/2 (which follows Metcalfe's law). so that even if the utility of groups available to be joined is very small on a per-group basis, eventually the network effect of potential group membership can dominate the overall economics of the system. Derivation Given a set ''A'' of ''N'' people, it has 2''N'' possible subsets. This is not difficult to see, since we can form each possible subset by simply choosing for each element of ''A'' one of two possibilities: whether to include that ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed–Solomon Error Correction
In information theory and coding theory, Reed–Solomon codes are a group of error-correcting codes that were introduced by Irving S. Reed and Gustave Solomon in 1960. They have many applications, including consumer technologies such as MiniDiscs, CDs, DVDs, Blu-ray discs, QR codes, Data Matrix, data transmission technologies such as DSL and WiMAX, Broadcasting, broadcast systems such as satellite communications, Digital Video Broadcasting, DVB and ATSC Standards, ATSC, and storage systems such as RAID 6. Reed–Solomon codes operate on a block of data treated as a set of finite field, finite-field elements called symbols. Reed–Solomon codes are able to detect and correct multiple symbol errors. By adding check symbols to the data, a Reed–Solomon code can detect (but not correct) any combination of up to erroneous symbols, ''or'' locate and correct up to erroneous symbols at unknown locations. As an erasure code, it can correct up to erasures at locations that are known and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed House (other)
Reed House may refer to: ;in the United States ''(by state then city)'' * William Reed House, Birmingham, Alabama, listed on the National Register of Historic Places (NRHP) in Birmingham * Will Reed Farm House, Alleene, Arkansas * Reed House (Leipsic, Delaware) * Jehu Reed House, Little Heaven, Delaware * Mrs. Kersey Coates Reed House, Lake Forest, Illinois * Reed-Dossey House, Brownsville, Kentucky * Frederick Reed House, Falmouth, Kentucky, NRHP-listed in Pendleton County * Newdigate-Reed House, Maysville, Kentucky * Reed Farmstead Log Dependencies, Husser, Louisiana, NRHP-listed in Tangipahoa Parish * G. W. Reed Travellers Home, Benton, Maine * Philo Reed House, Fort Fairfield, Maine * Thomas Brackett Reed House, Portland, Maine * Robert Reed House, Woolrich, Maine * Col. Isaac G. Reed House, Waldoboro, Maine * Reed's Creek Farm, Centreville, Maryland * Fowle-Reed-Wyman House, Arlington, Massachusetts * Reed-Wood Place, Littleton, Massachusetts * Reed and Barton Complex, Taunto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed Family
The Reed family is an American business family that focuses on owning land. The family currently controls Simpson Investment Company, established 1890, and its spin-off Green Diamond Resource. The family owns 1.37 million acres across California, Washington and Oregon, and is the fifth-largest private landowner in the United States. History The Reed family was established by patriarch Mark Edward Reed (1866–1933). In 1897, Reed, a failed logger was hired by Sol Simpson to manage the Simpson Logging Company, Simpson's family-owned store, in the town of Shelton, Washington. Reed married Simpson's daughter, Irene, in 1901. After Simpson died in 1906, Reed assumed control of Simpson Logging. At that time the company employed approximately 300 people working out of five separate camps. By 1914, Reed had full control and transformed the company into a forest-products corporation. In 1925, the company opened its first sawmill, the Reed Mill, and entered the hemlock lumber manufact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed High School (other)
Reed High School may refer to: * Edward C. Reed High School, a school in Sparks, Nevada * Sarah T. Reed High School, a school in New Orleans, Louisiana See also * Reed-Custer High School, in Braidwood, Illinois {{schooldis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
