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https://en.wikipedia.org/wiki/Blue%20phase%20mode%20LCD | A blue phase mode LCD is a liquid crystal display (LCD) technology that uses highly twisted cholesteric phases in a blue phase. It was first proposed in 2007 to obtain a better display of moving images with, for example, frame rates of 100–120 Hz to improve the temporal response of LCDs. This operational mode for LCDs ... |
https://en.wikipedia.org/wiki/Solar%20lamp | A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter. The lamp operates on electricity from batteries, charged through the use of solar panel (solar photovoltaic panel)
Solar-powered househol... |
https://en.wikipedia.org/wiki/Sociology%20of%20the%20Internet | The sociology of the Internet (or the social psychology of the internet) involves the application of sociological or social psychological theory and method to the Internet as a source of information and communication. The overlapping field of digital sociology focuses on understanding the use of digital media as part o... |
https://en.wikipedia.org/wiki/SCSI%20RDMA%20Protocol | In computing the SCSI RDMA Protocol (SRP) is a protocol that allows one computer to access SCSI devices attached to another computer via remote direct memory access (RDMA). The SRP protocol is also known as the SCSI Remote Protocol. The use of RDMA makes higher throughput and lower latency possible than what is general... |
https://en.wikipedia.org/wiki/Odour%20activity%20value | Odour activity value (OAV) is a measure of importance of a specific compound to the odour of a sample (e.g. food). It is calculated as the ratio between the concentration of individual substance in a sample and the threshold concentration of this substance (odour threshold value, the minimal concentration that can be d... |
https://en.wikipedia.org/wiki/MIKE%20SHE | MIKE SHE is an integrated hydrological modelling system for building and simulating surface water flow and groundwater flow. MIKE SHE can simulate the entire land phase of the hydrologic cycle and allows components to be used independently and customized to local needs. MIKE SHE emerged from Système Hydrologique Euro... |
https://en.wikipedia.org/wiki/LVCMOS | Low voltage complementary metal oxide semiconductor (LVCMOS) is a low voltage class of CMOS technology digital integrated circuits.
Overview
To obtain better performance and lower costs, semiconductor manufacturers reduce the device geometries of integrated circuits. With each reduction the associated operating volta... |
https://en.wikipedia.org/wiki/Teragon | A teragon is a polygon with an infinite number of sides, the most famous example being the Koch snowflake ("triadic Koch teragon"). The term was coined by Benoît Mandelbrot from the words Classical Greek (teras, monster) + (gōnía, corner). Typically, a teragon will be bounded by one or more self-similar fractal curv... |
https://en.wikipedia.org/wiki/Progressive%20collapse | Progressive collapse is the process where a primary structural element fails, resulting in the failure of adjoining structural elements, which in turn causes further structural failure.
Progressive collapses may be accidental, as the result of design deficiencies, fire, unintentional overload, material failure or natu... |
https://en.wikipedia.org/wiki/Xgrid | Xgrid is a proprietary grid computing program and protocol developed by the Advanced Computation Group subdivision of Apple Inc.
It provides network administrators a method of creating a computing cluster, which allows them to exploit previously unused computational power for calculations that can be divided easily in... |
https://en.wikipedia.org/wiki/High-integrity%20pressure%20protection%20system | A high-integrity pressure protection system (HIPPS) is a type of safety instrumented system (SIS) designed to prevent over-pressurization of a plant, such as a chemical plant or oil refinery. The HIPPS will shut off the source of the high pressure before the design pressure of the system is exceeded, thus preventing lo... |
https://en.wikipedia.org/wiki/Platform-based%20design | Platform-based design is defined in Taxonomies for the Development and Verification of Digital Systems as "an integration oriented design approach emphasizing systematic reuse, for developing complex products based upon platforms and compatible hardware and software virtual component, intended to reduce development ris... |
https://en.wikipedia.org/wiki/The%20Earth%20Fighter%20Rayieza | is a role-playing video game developed and published by Enix. It was originally published in 1985 for the PC-8801, FM-7, X1, and MSX personal computer systems. The game was ported to the Famicom on December 15, 1987 by Nintendo under the title . The programming was done by Pax Softnica.
The game takes place in a sci-f... |
https://en.wikipedia.org/wiki/Bone%20marrow-derived%20macrophage | Bone-marrow-derived macrophage (BMDM) refers to macrophage cells that are generated in a research laboratory from mammalian bone marrow cells. BMDMs can differentiate into mature macrophages in the presence of growth factors and other signaling molecules. Undifferentiated bone marrow cells are cultured in the presence ... |
https://en.wikipedia.org/wiki/Gothicmed | Gothicmed is a European Union project carried out within the Culture 2000 programme and headed by the Ministry of Culture of the regional government of Valencia (Valencian Community), Spain. The aim of the project is to gain further insight into Gothic architecture in the Mediterranean, to connect researchers working s... |
https://en.wikipedia.org/wiki/Image%20filter%20end%20terminations | Filters designed using the image impedance methodology suffer from a peculiar flaw in the theory. The predicted characteristics of the filter are calculated assuming that the filter is terminated with its own image impedances at each end. This will not usually be the case; the filter will be terminated with fixed res... |
https://en.wikipedia.org/wiki/Newton%E2%80%93Pepys%20problem | The Newton–Pepys problem is a probability problem concerning the probability of throwing sixes from a certain number of dice.
In 1693 Samuel Pepys and Isaac Newton corresponded over a problem posed to Pepys by a school teacher named John Smith. The problem was:
Pepys initially thought that outcome C had the highest p... |
https://en.wikipedia.org/wiki/Stairstep%20interpolation | In image processing, stairstep interpolation is a general method for interpolating the pixels after enlarging an image. The key idea is to interpolate multiple times in small increments using any interpolation algorithm that is better than nearest-neighbor interpolation, such as bilinear interpolation, and bicubic inte... |
https://en.wikipedia.org/wiki/Shutdown%20%28computing%29 | To shut down or power off a computer is to remove power from a computer's main components in a controlled way. After a computer is shut down, main components such as CPUs, RAM modules and hard disk drives are powered down, although some internal components, such as an internal clock, may retain power.
Implementations
... |
https://en.wikipedia.org/wiki/Bilevel%20optimization | Bilevel optimization is a special kind of optimization where one problem is embedded (nested) within another. The outer optimization task is commonly referred to as the upper-level optimization task, and the inner optimization task is commonly referred to as the lower-level optimization task. These problems involve two... |
https://en.wikipedia.org/wiki/Selenium%20rectifier | A selenium rectifier is a type of metal rectifier, invented in 1933. They were used in power supplies for electronic equipment and in high-current battery-charger applications until they were superseded by silicon diode rectifiers in the late 1960s. The arrival of the alternator in some automobiles was the result of co... |
https://en.wikipedia.org/wiki/Deutsche%20Telekom%20eavesdropping%20controversy | The Deutsche Telekom eavesdropping controversy became public at the end of May 2008 through an article in the German weekly Der Spiegel. The prosecutor in Bonn has initiated investigations against eight former members of Deutsche Telekom's advisory board, executive board and former employees. The investigation focuses ... |
https://en.wikipedia.org/wiki/The%20Circle%20%28file%20system%29 | The Circle is a peer-to-peer distributed file system written mainly in Python. It is based on the Chord distributed hash table (DHT).
Development on the Circle was ceased in 2004.
Features
It supports file sharing, instant messaging with buddy lists, the Internet Relay Chat model of sending a message to a channel, an... |
https://en.wikipedia.org/wiki/Superincreasing%20sequence | In mathematics, a sequence of positive real numbers is called superincreasing if every element of the sequence is greater than the sum of all previous elements in the sequence.
Formally, this condition can be written as
for all n ≥ 1.
Example
For example, (1, 3, 6, 13, 27, 52) is a superincreasing sequence, but (... |
https://en.wikipedia.org/wiki/Founder%20Technology | Founder Technology Group Corporation (), a subsidiary of Founder Group from Peking University, is an information technology state-owned enterprise in Shanghai, China. It is engaged in the development of personal computers and computer peripherals, under the brand of "Fang Zheng" (方正), and printed circuit boards.
Histo... |
https://en.wikipedia.org/wiki/Telugu-Kannada%20alphabet | The Telugu–Kannada script (or Kannada–Telugu script) was a writing system used in Southern India. Despite some significant differences, the scripts used for the Telugu and Kannada languages remain quite similar and highly mutually intelligible. Satavahanas and Chalukyas influenced the similarities between Telugu and Ka... |
https://en.wikipedia.org/wiki/Biorock | Biorock (also seacrete) is a cement-like engineering material formed when a small electric current is passed between underwater metal electrodes placed in seawater causing dissolved minerals to accrete onto the cathode to form a thick layer of limestone. This 'accretion process' can be used to create building materials... |
https://en.wikipedia.org/wiki/Prototype%20filter | Prototype filters are electronic filter designs that are used as a template to produce a modified filter design for a particular application. They are an example of a nondimensionalised design from which the desired filter can be scaled or transformed. They are most often seen in regard to electronic filters and espe... |
https://en.wikipedia.org/wiki/Mm%27-type%20filter | mm'-type filters, also called double-m-derived filters, are a type of electronic filter designed using the image method. They were patented by Otto Zobel in 1932. Like the m-type filter from which it is derived, the mm'-type filter type was intended to provide an improved impedance match into the filter termination imp... |
https://en.wikipedia.org/wiki/Reverse%20curve | In civil engineering, a reverse curve (or "S" curve) is a section of the horizontal alignment of a highway or rail route in which a curve to the left or right is followed immediately by a curve in the opposite direction.
On highways in the United States reverse curves are often announced by the posting of a W1-4L sign... |
https://en.wikipedia.org/wiki/Pollack%27s%20rule | Pollack's Rule states that microprocessor "performance increase due to microarchitecture advances is roughly proportional to [the] square root of [the] increase in complexity". This contrasts with power consumption increase, which is roughly linearly proportional to the increase in complexity. Complexity in this contex... |
https://en.wikipedia.org/wiki/Apparent%20viscosity | In fluid mechanics, apparent viscosity (sometimes denoted ) is the shear stress applied to a fluid divided by the shear rate:
For a Newtonian fluid, the apparent viscosity is constant, and equal to the Newtonian viscosity of the fluid, but for non-Newtonian fluids, the apparent viscosity depends on the shear rate. Ap... |
https://en.wikipedia.org/wiki/Cell-free%20protein%20synthesis | Cell-free protein synthesis, also known as in vitro protein synthesis or CFPS, is the production of protein using biological machinery in a cell-free system, that is, without the use of living cells. The in vitro protein synthesis environment is not constrained by a cell wall or homeostasis conditions necessary to main... |
https://en.wikipedia.org/wiki/Solving%20the%20E-waste%20Problem | Solving the E-waste Problem (StEP) is a membership organization that is part of United Nations University and was created to develop solutions to address issues associated with electronic waste. Some of the most eminent players in the fields of Production, Reuse and Recycling of Electrical and Electronic Equipment (EEE... |
https://en.wikipedia.org/wiki/Tricritical%20point | Tricritical point refers to a point where the second order phase transition curve meets the first order phase transition curve, which was first introduced by Lev Landau in 1937, wherein Landau called the tricritical point as the critical point of the continuous transition. The first example of the tricritical point was... |
https://en.wikipedia.org/wiki/Berkefeld%20filter | A Berkefeld filter is a water filter made of diatomaceous earth (Kieselguhr). It was invented in Germany in 1891, and by 1922 was being marketed in the United Kingdom by the Berkefeld Filter Co. Berkefeld was the name of the owner of the mine in Hanover, Germany, where the ceramic material was obtained.
The Berkefeld... |
https://en.wikipedia.org/wiki/Chamberland%20filter | A Chamberland filter, also known as a Pasteur–Chamberland filter, is a porcelain water filter invented by Charles Chamberland in 1884.
It was developed after Henry Doulton's ceramic water filter of 1827. It is similar to the Berkefeld filter in principle.
Design
The filter consists of a permeable unglazed porcelain ... |
https://en.wikipedia.org/wiki/Tegra | Tegra is a system on a chip (SoC) series developed by Nvidia for mobile devices such as smartphones, personal digital assistants, and mobile Internet devices. The Tegra integrates an ARM architecture central processing unit (CPU), graphics processing unit (GPU), northbridge, southbridge, and memory controller onto one ... |
https://en.wikipedia.org/wiki/Universal%20algebraic%20geometry | In algebraic geometry, universal algebraic geometry generalizes the geometry of rings to geometries of arbitrary varieties of algebras, so that every variety of algebras has its own algebraic geometry. The two terms algebraic variety and variety of algebras should not be confused.
See also
Algebraic geometry
Universal... |
https://en.wikipedia.org/wiki/Krawtchouk%20matrices | In mathematics, Krawtchouk matrices are matrices whose entries are values of Krawtchouk polynomials at nonnegative integer points. The Krawtchouk matrix K(N) is an matrix. The first few Krawtchouk matrices are:
Definition
In general, for positive integer , the entries are given by the generating function:
where t... |
https://en.wikipedia.org/wiki/Douady%20rabbit | The Douady rabbit is any of various particular filled Julia sets whose parameter is near the center of a period 3 bud of the Mandelbrot set for a complex quadratic map. It is named after French mathematician Adrien Douady.
Formula
The rabbit is generated by iterating the Mandelbrot set map on the complex plane, with ... |
https://en.wikipedia.org/wiki/Topological%20data%20analysis | In applied mathematics, topological data analysis (TDA) is an approach to the analysis of datasets using techniques from topology. Extraction of information from datasets that are high-dimensional, incomplete and noisy is generally challenging. TDA provides a general framework to analyze such data in a manner that is i... |
https://en.wikipedia.org/wiki/Erfoud%20manuport | The Erfoud manuport (300,000-200,000 BP) is a 70 mm long and 35 mm wide (at its widest point) fossilized fragment of a cuttlefish resembling naturalistic, life-size, non-erect human phallus.
The fossil was found in 1984 by Lutz Fiedler of Marburg University, Germany, at an archaeological site near the towns of Erfoud ... |
https://en.wikipedia.org/wiki/McIntosh%20and%20Fildes%27%20anaerobic%20jar | McIntosh and Fildes' anaerobic jar is an instrument used in the production of an anaerobic environment. This method of anaerobiosis as others is used to culture bacteria which die or fail to grow in presence of oxygen (anaerobes). It was originally introduced by James McIntosh, Paul Fildes and William Bulloch in 1916. ... |
https://en.wikipedia.org/wiki/Mibbit | Mibbit is a web-based client for web browsers that supports Internet Relay Chat (IRC), Yahoo! Messenger, and Twitter. It is developed by Jimmy Moore and is designed around the Ajax model with a user interface written in JavaScript. It is the IRC application setup by default on Firefox.
Design
Mibbit's user interface... |
https://en.wikipedia.org/wiki/PV-Wave | PV-WAVE (Precision Visuals - Workstation Analysis and Visualization Environment) is an array oriented fourth-generation programming language used by engineers, scientists, researchers, business analysts and software developers to build and deploy visual data analysis applications. In January 2019, PV-Wave parent Rogue ... |
https://en.wikipedia.org/wiki/Besicovitch%20covering%20theorem | In mathematical analysis, a Besicovitch cover, named after Abram Samoilovitch Besicovitch, is an open cover of a subset E of the Euclidean space RN by balls such that each point of E is the center of some ball in the cover.
The Besicovitch covering theorem asserts that there exists a constant cN depending only on the ... |
https://en.wikipedia.org/wiki/Open%20Agent%20Architecture | Open Agent Architecture, or OAA for short, is a framework for integrating a community of heterogeneous software agents in a distributed environment. It is also a research project of the SRI International Artificial Intelligence Center.
Roughly, the architecture is that a central "blackboard" server holds a list of tas... |
https://en.wikipedia.org/wiki/Benz%20plane | In mathematics, a Benz plane is a type of 2-dimensional geometrical structure, named after the German mathematician Walter Benz. The term was applied to a group of objects that arise from a common axiomatization of certain structures and split into three families, which were introduced separately: Möbius planes, Laguer... |
https://en.wikipedia.org/wiki/Royal%20Australian%20Naval%20Bridging%20Train | The Royal Australian Naval Bridging Train was a unique unit of the Royal Australian Navy. It was active only during the First World War, where it served in the Gallipoli and the Sinai and Palestine Campaigns. The Train was formed in February 1915 and stood down in May 1917. Throughout its existence, it was composed of ... |
https://en.wikipedia.org/wiki/Form%20liner | Form liners are the liners used in the preparation of designs on concrete walls. The use of form liners often results in more attractive walls for highways, neighborhoods, beaches and parks. Form liners come in many different shapes and designs, and can produce a variety of different results on concrete.
The process t... |
https://en.wikipedia.org/wiki/Janin%20Plot | In biochemistry, a Janin plot, like a Ramachandran plot, is a way to visualize dihedral angle distributions in protein structures. While a Ramachandran plot relates the two backbone dihedral angles, a Janin plot relates the first side chain dihedral angle χ-1 against χ-2. Because not all amino acids have these dihedral... |
https://en.wikipedia.org/wiki/Hypersegmented%20neutrophil | Neutrophil hypersegmentation can be defined as the presence of neutrophils whose nuclei have six or more lobes or the presence of more than 3% of neutrophils with at least five nuclear lobes. This is a clinical laboratory finding. It is visualized by drawing blood from a patient and viewing the blood smeared on a slide... |
https://en.wikipedia.org/wiki/Secant%20variety | In algebraic geometry, the secant variety , or the variety of chords, of a projective variety is the Zariski closure of the union of all secant lines (chords) to V in :
(for , the line is the tangent line.) It is also the image under the projection of the closure Z of the incidence variety
.
Note that Z has dimensi... |
https://en.wikipedia.org/wiki/Qore%20%28PlayStation%20Network%29 | Qore (pronounced "core") was a monthly subscription-based interactive online magazine for the PlayStation Network and replaces the Jampack series of disks offered by PlayStation Underground. Available only in North America, the service offered high definition videos, interviews, and behind-the-scenes footage pertaining... |
https://en.wikipedia.org/wiki/Faustmann%27s%20formula | Faustmann's formula, or the Faustmann model, gives the present value of the income stream for forest rotation. It was derived by the German forester Martin Faustmann in 1849.
The rotation problem, deciding when to cut down the forest, means solving the problem of maximising Faustmann's formula and this was solved by B... |
https://en.wikipedia.org/wiki/Lee%20distance | In coding theory, the Lee distance is a distance between two strings and of equal length n over the q-ary alphabet } of size . It is a metric defined as
If or the Lee distance coincides with the Hamming distance, because both distances are 0 for two single equal symbols and 1 for two single non-equal symbols. Fo... |
https://en.wikipedia.org/wiki/Interactive%20specialization | Interactive Specialization is a theory of brain development proposed by the British developmental cognitive neuroscientist Mark Johnson, formerly head of the Centre for Brain and Cognitive Development at Birkbeck, University of London, London and who is now Head of Psychology at the University of Cambridge.
In his bo... |
https://en.wikipedia.org/wiki/Comparison%20of%20cluster%20software | The following tables compare general and technical information for notable computer cluster software. This software can be grossly separated in four categories: Job scheduler, nodes management, nodes installation and integrated stack (all the above).
General information
Table explanation
Software: The name of the a... |
https://en.wikipedia.org/wiki/Flash%20Gordon%20%28video%20game%29 | Flash Gordon is a video game based on a comic strip character of the same name. The game was published in 1986 by Mastertronic for the Amstrad CPC, Commodore 64, ZX Spectrum, and MSX personal computers.
It features three individual levels. The first is set on the jungle world of Arboria in which Flash Gordon has to t... |
https://en.wikipedia.org/wiki/Masters%20of%20the%20Universe%3A%20The%20Movie | Masters of the Universe: The Movie is an action-adventure game developed by Gremlin Graphics, and published in 1987. It is based on the American film Masters of the Universe (1987), directed by Gary Goddard. The film and the game are part of the Masters of the Universe media franchise.
A promotional photo of Dolph Lun... |
https://en.wikipedia.org/wiki/Wiring%20diagram | A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the power and signal connections between the devices.
A wiring diagram usually gives information about the relative position and arrangement of devices and ... |
https://en.wikipedia.org/wiki/Axiom%20schema%20of%20predicative%20separation | In axiomatic set theory, the axiom schema of predicative separation, or of restricted, or Δ0 separation, is a schema of axioms which is a restriction of the usual axiom schema of separation in Zermelo–Fraenkel set theory.
This name Δ0 stems from the Lévy hierarchy, in analogy with the arithmetic hierarchy.
Statement
... |
https://en.wikipedia.org/wiki/Selective%20area%20epitaxy | Selective area epitaxy is the local growth of epitaxial layer through a patterned amorphous dielectric mask (typically SiO2 or Si3N4) deposited on a semiconductor substrate. Semiconductor growth conditions are selected to ensure epitaxial growth on the exposed substrate, but not on the dielectric mask. SAE can be execu... |
https://en.wikipedia.org/wiki/SMART%20Retainer | The SMART Retainer is a small micro sensor which is imbedded in a traditional orthodontic retainer. The sensor monitors how often the retainer is being worn, and the information is loaded onto the orthodontist's computer via a reader.
Description
The micro sensor was created to help parents and orthodontists monitor... |
https://en.wikipedia.org/wiki/Lommel%20polynomial | A Lommel polynomial Rm,ν(z), introduced by , is a polynomial in 1/z giving the recurrence relation
where Jν(z) is a Bessel function of the first kind.
They are given explicitly by
See also
Lommel function
Neumann polynomial
References
Polynomials
Special functions |
https://en.wikipedia.org/wiki/Daylife | Daylife was an online publishing company which offered cloud-based tools for web publishers, marketers and developers. It provided digital media management tools and content feeds to publishers, brand marketers and developers. Daylife was founded in 2006, raised $15 million from several investors, including Getty Image... |
https://en.wikipedia.org/wiki/Award%20Software | Award Software International Inc. was a BIOS manufacturer founded in 1983 by Rene Vishney and Bob Stillman in San Jose, California. In 1984, the company moved its international headquarters to Los Gatos, California, United States.
History
In 1988, Bob Stillman left the company. The company was held privately by Rene V... |
https://en.wikipedia.org/wiki/Kamov%20Ka-90 | The Kamov Ka-90 is a projected high-speed helicopter built by Kamov, a model of which was displayed at the HeliRussia 2008 trade show in April 2008. The concept is a hybrid design, flying like a helicopter for takeoff and landing and an aeroplane in cruise flight. The company's general designer Sergei Mikheyev said tha... |
https://en.wikipedia.org/wiki/Fontana%20bridge | A Fontana bridge is a type of bridge circuit that implements a wide frequency band voltage-to-current converter. The converter is characterized by a combination of positive and negative feedback loops, implicit in this bridge configuration. This feature allows compensation for parasitic impedance connected in parallel... |
https://en.wikipedia.org/wiki/Bi-isotropic%20material | In physics, engineering and materials science, bi-isotropic materials have the special optical property that they can rotate the polarization of light in either refraction or transmission. This does not mean all materials with twist effect fall in the bi-isotropic class. The twist effect of the class of bi-isotropic m... |
https://en.wikipedia.org/wiki/Indian%20Institute%20of%20Aeronautical%20Engineering | The Indian Institute of Aeronautical Engineering is a college of engineering at Dehradun, Uttarakhand, northern India.
It was founded in 1992 at 15/1, Kalidas Road, Dehradun. In 1995 it moved to 179 Kalidas Road, and in 2006 relocated near Jolly Grant Airport. The site has class rooms and hostels with all aircraft tra... |
https://en.wikipedia.org/wiki/Calcium%20pump | Calcium pumps are a family of ion transporters found in the cell membrane of all animal cells. They are responsible for the active transport of calcium out of the cell for the maintenance of the steep Ca2+ electrochemical gradient across the cell membrane. Calcium pumps play a crucial role in proper cell signalling by ... |
https://en.wikipedia.org/wiki/Woo%20circles | In geometry, the Woo circles, introduced by Peter Y. Woo, are a set of infinitely many Archimedean circles.
Construction
Form an arbelos with the two inner semicircles tangent at point C. Let m denote any nonnegative real number. Draw two circles, with radii m times the radii of the smaller two arbelos semicircles, c... |
https://en.wikipedia.org/wiki/Ninja-Kid | is the first video game in the Ninja-kun series. It was released for arcades, on the Famicom, and MSX by Jaleco in 1984. The MSX version was the only version released outside of Japan, as it was released in Europe under the name "Ninja".
Gameplay
Ninja-kun's Demon Castle Adventure features three upward scrolling level... |
https://en.wikipedia.org/wiki/Rate%20of%20penetration | In the drilling industry, the rate of penetration (ROP), also known as penetration rate or drill rate, is the speed at which a drill bit breaks the rock under it to deepen the borehole. It is normally measured in feet per minute or meters per hour, but sometimes it is expressed in minutes per foot.
Generally, ROP inc... |
https://en.wikipedia.org/wiki/Vascular%20malformation | A vascular malformation is a blood vessel or lymph vessel abnormality. Vascular malformations are one of the classifications of vascular anomalies, the other grouping is vascular tumors. They may cause aesthetic problems as they have a growth cycle, and can continue to grow throughout life.
Vascular malformations of t... |
https://en.wikipedia.org/wiki/Formalized%20Music | Formalized Music: Thought and Mathematics in Composition is a book by Greek composer, architect, and engineer Iannis Xenakis in which he explains his motivation, philosophy, and technique for composing music with stochastic mathematical functions. It was published in Paris in 1963 as Musiques formelles: nouveaux princi... |
https://en.wikipedia.org/wiki/GEORGE%20%28operating%20system%29 | GEORGE was the name given to a series of operating systems released by International Computers and Tabulators (ICT) in the 1960s, for the ICT 1900 series of computers. These included GEORGE 1, GEORGE 2, GEORGE 3, and GEORGE 4.
Initially the 1900 series machines, like the Ferranti-Packard 6000 on which they were based... |
https://en.wikipedia.org/wiki/MacArabic%20encoding | MacArabic encoding is an obsolete encoding for Arabic (and English) text that was used in Apple Macintosh computers to texts.
The encoding is identical to MacFarsi encoding, except the numerals.
References
See also
MacFarsi encoding
Arabic script in Unicode
Character sets
Arabic
Arabic script |
https://en.wikipedia.org/wiki/Priming%20%28immunology%29 | Priming is the first contact that antigen-specific T helper cell precursors have with an antigen. It is essential to the T helper cells' subsequent interaction with B cells to produce antibodies. Priming of antigen-specific naive lymphocytes occurs when antigen is presented to them in immunogenic form (capable of induc... |
https://en.wikipedia.org/wiki/Wireless%20HDMI |
Overview and Operation
Wireless HDMI refers to the wireless transmission of high-definition audio and video signals between devices, using unlicensed radio frequencies like 5 GHz, 60 GHz, or 190 GHz. This technology eliminates the need for an HDMI cable, allowing users to transmit signals wirelessly between the com... |
https://en.wikipedia.org/wiki/Accommodation%20index | The accommodation index is a statistic used in the neurosciences for describing spike train data. Many methods of experimental neuroscience, such as voltage clamp recordings, give their output in the form of measured voltages of individual neurons. Generally, the only important element of these voltage traces is the oc... |
https://en.wikipedia.org/wiki/SGI%20IRIS | The SGI IRIS series of terminals and workstations from Silicon Graphics was produced in the 1980s and 1990s. IRIS is an acronym for Integrated Raster Imaging System.
Overview
68000
The early systems up to IRIS 3000 use the Motorola 68000 series of processors. These systems run the GL2 operating system, a predecessor... |
https://en.wikipedia.org/wiki/Order%20of%20integration%20%28calculus%29 | In calculus, interchange of the order of integration is a methodology that transforms iterated integrals (or multiple integrals through the use of Fubini's theorem) of functions into other, hopefully simpler, integrals by changing the order in which the integrations are performed. In some cases, the order of integrati... |
https://en.wikipedia.org/wiki/Geometric%20data%20analysis | Geometric data analysis comprises geometric aspects of image analysis, pattern analysis, and shape analysis, and the approach of multivariate statistics, which treat arbitrary data sets as clouds of points in a space that is n-dimensional. This includes topological data analysis, cluster analysis, inductive data analys... |
https://en.wikipedia.org/wiki/Hosoya%27s%20triangle | Hosoya's triangle or the Hosoya triangle (originally Fibonacci triangle; ) is a triangular arrangement of numbers (like Pascal's triangle) based on the Fibonacci numbers. Each number is the sum of the two numbers above in either the left diagonal or the right diagonal.
Name
The name "Fibonacci triangle" has also been ... |
https://en.wikipedia.org/wiki/Proofpoint%2C%20Inc. | Proofpoint, Inc. is an American enterprise cybersecurity company based in Sunnyvale, California that provides software as a service and products for email security, identity threat defense, data loss prevention, electronic discovery, and email archiving.
In 2021, Proofpoint was acquired by private equity firm Thoma Br... |
https://en.wikipedia.org/wiki/Extended%20negative%20binomial%20distribution | In probability and statistics the extended negative binomial distribution is a discrete probability distribution extending the negative binomial distribution. It is a truncated version of the negative binomial distribution for which estimation methods have been studied.
In the context of actuarial science, the distri... |
https://en.wikipedia.org/wiki/Tussock%20grass | Tussock grasses or bunch grasses are a group of grass species in the family Poaceae. They usually grow as singular plants in clumps, tufts, hummocks, or bunches, rather than forming a sod or lawn, in meadows, grasslands, and prairies. As perennial plants, most species live more than one season. Tussock grasses are of... |
https://en.wikipedia.org/wiki/Combinatorial%20data%20analysis | In statistics, combinatorial data analysis (CDA) is the study of data sets where the order in which objects are arranged is important. CDA can be used either to determine how well a given combinatorial construct reflects the observed data, or to search for a suitable combinatorial construct that does fit the data.
See... |
https://en.wikipedia.org/wiki/Measured%20depth | In the oil industry measured depth (commonly referred to as MD, or just the depth) is the length of the drilled borehole. In conventional vertical wells, this coincides with the true vertical depth, but in directional or horizontal wells, especially those using extended reach drilling, the two can deviate greatly. For ... |
https://en.wikipedia.org/wiki/Directional%20well | A directional well is the oil industry term for an oil well with a borehole that deviates from a vertically straight line. This is normally done with the intention of hitting several target sands, for instance.
References
External links
Directional well, Oilfield Glossary, Schlumberger
Petroleum engineering
Oilf... |
https://en.wikipedia.org/wiki/NaGISA | NaGISA (Natural Geography in Shore Areas or Natural Geography of In-Shore Areas) is an international collaborative effort aimed at inventorying, cataloguing, and monitoring biodiversity of the in-shore area. So named for the Japanese word "nagisa" ("where the land meets the sea"), it is an Apronym. NaGISA is the first ... |
https://en.wikipedia.org/wiki/Barkhausen%20stability%20criterion | In electronics, the Barkhausen stability criterion is a mathematical condition to determine when a linear electronic circuit will oscillate. It was put forth in 1921 by German physicist Heinrich Georg Barkhausen (1881–1956). It is widely used in the design of electronic oscillators, and also in the design of general ne... |
https://en.wikipedia.org/wiki/Liu%20Hui%27s%20%CF%80%20algorithm | Liu Hui's algorithm was invented by Liu Hui (fl. 3rd century), a mathematician of the state of Cao Wei. Before his time, the ratio of the circumference of a circle to its diameter was often taken experimentally as three in China, while Zhang Heng (78–139) rendered it as 3.1724 (from the proportion of the celestial cir... |
https://en.wikipedia.org/wiki/Jon%20Callas | Jon Callas is an American computer security expert, software engineer, user experience designer, and technologist who is the co-founder and former CTO of the global encrypted communications service Silent Circle. He has held major positions at Digital Equipment Corporation, Apple, PGP, and Entrust, and is considered "o... |
https://en.wikipedia.org/wiki/Mud%20weight | Introduction
In the oil industry, mud weight is the density of the drilling fluid and is normally measured in pounds per gallon (lb/gal) (ppg) or pound cubic feet (pcf) . In the field it is measured using a mud scale or mud balance. Mud can weigh up to 22 or 23 ppg. A gallon of water typically weighs 8.33 pounds (or... |
https://en.wikipedia.org/wiki/Estimated%20pore%20pressure | Estimated pore pressure, as used in the oil industry and mud logging, is an approximation of the amount of force that is being exerted into the borehole by fluids or gases within the formation that has been penetrated.
In the oil industry, estimated pore pressure is measured in pounds per square inch (psi), but is con... |
https://en.wikipedia.org/wiki/Corrected%20d-exponent |
Description
The Corrected d-exponent, also known as cd-exponent or more correctly dc-exponent (dc-exponent) as used in mud logging and formation pore pressure analysis in the oil industry, is an extrapolation of certain drilling parameters to estimate a pressure gradient for pore pressure evaluation while drilling. N... |
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