|
P4 (programming Language)
P4 is a programming language for controlling packet forwarding planes in networking devices, such as routers and switches. In contrast to a general purpose language such as C or Python, P4 is a domain-specific language with a number of constructs optimized for network data forwarding. P4 is distributed as open-source, permissively licensed code, and is maintained by the P4 Language Consortium, a not-for-profit organization hosted by the Open Networking Foundation The Open Networking Foundation (ONF) is a non-profit operator-led consortium. It uses an open source business model aimed at promoting networking through software-defined networking (SDN) and standardizing the OpenFlow protocol and related tech .... History P4 was originally described in a 2014 Computer Communication Review, SIGCOMM ''CCR'' paper titled “Programming Protocol-Independent Packet Processors”—the alliterative name shortens to "P4". The first P4 workshop took place in June 2015 at Stanford U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peugeot P4
The P4 is an unarmoured off-road vehicle used by the military of France. It was manufactured by Peugeot but is now manufactured by Panhard. It is to be replaced with the PVP by Panhard. The P4 is a derivative of the Mercedes Geländewagen military version built under license by Peugeot for the French military. Peugeot did not have a licence to export the vehicle anywhere else than to the countries bound to France by defence agreements. History In the late 1960s, the French army decided that its 10,001 Jeeps needed to be replaced. The replacement vehicle would carry four men with radio equipment and would be small enough to be parachuted and transported by plane. After many technical issues, the new vehicle was designed in the 1970s. Agreement was reached between Peugeot and Mercedes to co-produce the vehicle on a 50:50 basis. Peugeot installed the engine of the Peugeot 504 and the transmission of the Peugeot 604 on the Mercedes-Benz G-Class; it also installed the electrical s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protofour
__NOTOC__ Protofour or P4 is a set of standards for model railways allowing construction of models to a scale of 4 mm to 1 foot (1:76.2), the predominant scale of model railways of the British prototype. For historical reasons almost all manufacturers of British prototype models use 00 gauge (1:76.2 models running on gauge track). There are several finescale standards which have been developed to enable more accurate models than 00, and P4 is the most accurate in common use. The P4 standards specify a scale model track gauge of for standard gauge railways. Joe Brook Smith was the first to propose use of an exact scale track gauge in July 1964, when also the term “Protofour” was invented by Malcolm Cross. The standards were later published in Model Railway News by the Model Railway Study Group in August 1966. Just as in the prototype railway, on a model the wheel-rail interface is the fundamental aspect of reliable operation. So as well as a track gauge, P4 also spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetraphosphorus
Elemental phosphorus can exist in several allotropes, the most common of which are white and red solids. Solid violet and black allotropes are also known. Gaseous phosphorus exists as diphosphorus and atomic phosphorus. White phosphorus White phosphorus, yellow phosphorus or simply tetraphosphorus () exists as molecules made up of four atoms in a tetrahedral structure. The tetrahedral arrangement results in ring strain and instability. The molecule is described as consisting of six single P–P bonds. Two crystalline forms are known. The α form is defined as the standard state of the element, but is actually metastable under standard conditions. It has a body-centered cubic crystal structure, and transforms reversibly into the β form at 195.2 K. The β form is believed to have a hexagonal crystal structure. White phosphorus is a translucent waxy solid that quickly becomes yellow when exposed to light. For this reason it is also called yellow phosphorus. It glows greenish in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Persona 4
released outside of Japan as ''Shin Megami Tensei: Persona 4'', is a 2008 role-playing video game by Atlus. It is chronologically the fifth installment in the ''Persona'' series, itself a part of the larger ''Megami Tensei'' franchise, and was released for the PlayStation 2 in Japan in July 2008, North America in December 2008, and Europe in March 2009, as one of the final major exclusives for the system. It was re-released as a PlayStation 2 Classic for the PlayStation 3 in April 2014. ''Persona 4'' takes place in a fictional Japanese countryside and is indirectly related to earlier ''Persona'' games. The player-named protagonist is a high-school student who moved into the countryside from the city for a year. During his year-long stay, he becomes involved in investigating mysterious murders with a group of friends while harnessing the power to summon physical manifestations of their psyches known as a Persona. The plot of ''Persona 4'' was inspired by the work of mystery nov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ATX Power Connector
ATX (Advanced Technology eXtended) is a motherboard and power supply configuration specification developed by Intel in 1995 to improve on previous de facto standards like the AT design. It was the first major change in desktop computer enclosure, motherboard and power supply design in many years, improving standardization and interchangeability of parts. The specification defines the dimensions; the mounting points; the I/O panel; and the power and connector interfaces among a computer case, a motherboard, and a power supply. Overview ATX is the most common motherboard design. Other standards for smaller boards (including microATX, FlexATX, nano-ITX, and mini-ITX) usually keep the basic rear layout but reduce the size of the board and the number of expansion slots. Dimensions of a full-size ATX board are , which allows many ATX chassis to accept microATX boards. The ATX specifications were released by Intel in 1995 and have been revised numerous times since. The most rece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Progesterone
Progesterone (P4) is an endogenous steroid and progestogen sex hormone involved in the menstrual cycle, pregnancy, and embryogenesis of humans and other species. It belongs to a group of steroid hormones called the progestogens and is the major progestogen in the body. Progesterone has a variety of important functions in the body. It is also a crucial metabolic intermediate in the production of other endogenous steroids, including the sex hormones and the corticosteroids, and plays an important role in brain function as a neurosteroid. In addition to its role as a natural hormone, progesterone is also used as a medication, such as in combination with estrogen for contraception, to reduce the risk of uterine or cervical cancer, in hormone replacement therapy, and in feminizing hormone therapy. It was first prescribed in 1934. Biological activity Progesterone is the most important progestogen in the body. As a potent agonist of the nuclear progesterone receptor (nPR) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enterobacteria Phage P4
''Enterobacteria phage P4'' (also known as satellite phage P4) is a temperate bacteriophage strain of species ''Escherichia virus P2'' within genus ''Peduovirus'' (formerly ''P2-like viruses'', ''P2virus'', and ''P2likevirus''), subfamily ''Peduovirinae'', family ''Myoviridae''. It is a satellite virus, requiring P2-related helper phage to grow lytically. Structure The P4 virion has a tail and an icosahedral head containing a linear double-stranded DNA genome of 11,627 kb. Life cycle Phage P4 infects ''Escherichia coli''. It is a satellite virus which cannot engage in lytic growth without the presence of a P2-related helper phage. It generally follows a lysogenic life cycle: after infection, the P4 genome integrates into that of its host. The P4 genome can also exist on its own within the host cell and can replicate as a free plasmid A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trans-Pacific Strategic Economic Partnership
The Trans-Pacific Strategic Economic Partnership Agreement (TPSEP), also known as P4, is a trade agreement between four Pacific Rim countries concerning a variety of matters of economic policy. The agreement was signed by Brunei, Chile, Singapore and New Zealand in 2005 and entered into force in 2006. It is a comprehensive trade agreement, affecting trade in goods, rules of origin, trade remedies, sanitary and phytosanitary measures, technical barriers to trade, trade in services, intellectual property, government procurement and competition policy. Among other things, it called for reduction by 90 percent of all tariffs between member countries by 1 January 2006, and reduction of all trade tariffs to zero by the year 2015. Earlier agreements By 2001, New Zealand and Singapore had concluded the Agreement between New Zealand and Singapore on a Closer Economic Partnership (NZSCEP). The ''Trans-Pacific Strategic Economic Partnership Agreement'' built on the NZSCEP. Negotiations Duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
P4 Radio Hele Norge
P4 Radio Hele Norge AS Norway's leading national, private radio station with 24% national market share, about one million daily listeners and two million weekly. P4 Radio Hele Norge operates a nationwide public service-licence, with official requirements for news and information. It broadcasts via Digital audio broadcasting, DAB+ and on the Internet. On 1 November 2006 the company launched an all-rock music station, ''Bandit'', available via internet streaming, and previously also on DAB. The headquarters is located in Lillehammer, with regional representation and broadcast-studios in Oslo. P4 have previously been represented with studios and offices in Sarpsborg, Bergen, Tromsø, Stavanger, Kristiansand and Trondheim. Radio Stations * P4 * NRJ Norway * P5 Hits * P6 Rock * P7 Klem * P8 Pop * P9 Retro * P10 Country * P11 Bandit See also *Radio Norge: PFI's main radio competitor and former holder of the Norwegian P4 FM frequencies. External links P4Bandit Radio stations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel Pentium 4
Pentium 4 is a series of single-core CPUs for desktops, laptops and entry-level servers manufactured by Intel. The processors were shipped from November 20, 2000 until August 8, 2008. The production of Netburst processors was active from 2000 until May 21, 2010. All Pentium 4 CPUs are based on the NetBurst microarchitecture. The Pentium 4 '' Willamette'' (180 nm) introduced SSE2, while the '' Prescott'' (90 nm) introduced SSE3. Later versions introduced Hyper-Threading Technology (HTT). The first Pentium 4-branded processor to implement 64-bit was the ''Prescott'' (90 nm) (February 2004), but this feature was not enabled. Intel subsequently began selling 64-bit Pentium 4s using the ''"E0" revision'' of the Prescotts, being sold on the OEM market as the Pentium 4, model F. The E0 revision also adds eXecute Disable (XD) (Intel's name for the NX bit) to Intel 64. Intel's official launch of Intel 64 (under the name EM64T at that time) in mainstream desktop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sveriges Radio P4
P4 (''pe fyra'') is a national radio channel produced by the Swedish public broadcaster Sveriges Radio. P4 was started in 1987 as a network of regional stations, but national programming was added in 1993 when P3 was relaunched as a specialist youth channel and P4 took over a large part of P3's former programming intended for a more adult audience. Programming Targeted at an across-the-board audience, but with the emphasis on older listeners, it is the corporation's most popular radio channel, presenting popular music, entertainment, and sport. On weekdays most of the daytime schedule comes from 25 different regional stations, each producing programming (including local news coverage) for their own areas, while in the evenings and at weekends the channel carries national programming. Overnight (between 0.00 and 6.00) P4 and youth channel P3 present a joint programme of "music, games, and chat". Among the more popular programmes broadcast nationally are: '' Karlavagnen'', '' Melo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Persona 4")
