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Topic Review
Hatha Yoga
Hatha yoga is a branch of Yoga, one of the six schools of Hinduism. The word haṭha literally means "force" and thus alludes to a system of physical techniques.:770:527 In India hatha yoga is associated in popular tradition with the 'Yogis' of the Natha Sampradaya through its mythical founder Matsyendranath. Matsyendranath, also known as Minanath or Minapa in Tibet, is celebrated as a saint in both Buddhist and Hindu tantric and hatha yoga schools. However, James Mallinson associates hatha yoga with the Dashanami Sampradaya and the mystical figure of Dattatreya. According to the Dattatreya Yoga Śastra, there are two forms of hatha yoga: one practiced by Yajñavalkya consisting of the eight limbs of ashtanga yoga and another practiced by Kapila consisting of eight mudras. Currently, the oldest dated text to describe hatha yoga, the Amṛtasiddhi, comes from a tantric Buddhist milieu. The oldest texts to use the actual verbiage of hatha are also Vajrayana Buddhist. In the 20th century, hatha yoga, particularly asanas (the physical postures), became popular throughout the world as a form of physical exercise, and is now colloquially termed simply as "yoga."
  • 5.3K
  • 24 Nov 2022
Topic Review
Effects of Planting Density on Tropical Fruit Crops
Plant density refers to the number of individual plants per unit of ground area. In an ideal plant population, the capability of the plant canopy to collect environmental resources, including radiation energy, water, and inorganic nutrients, can be improved. A dense plant population increases the competition between plants for resources, which results in limited resources being depleted. Additionally, improved canopy construction can lead to an optimal leaf area index that can boost photosynthetic ability through efficient solar radiation interception. High densities of plants encourage better productivity; lower densities, in general, allow for the harvesting of more large fruits, resulting in higher pricing on the fresh fruit market. Higher planting density is used for higher yields without increasing production costs.
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  • 31 Aug 2022
Topic Review
Passive Constant Flow Regulators
Passive flow control regulators, also known as passive flow control or autoregulated or pressure-compensated valves, deliver, without external control and energy consumption, a constant flow rate regardless of pressure variations.
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  • 22 Dec 2020
Topic Review
Observer Effect
In physics, the observer effect is the disturbance of an observed system by the act of observation. This is often the result of instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire; this is difficult to do without letting out some of the air, thus changing the pressure. Similarly, seeing non-luminous objects requires light hitting the object, and causing it to reflect that light. While the effects of observation are often negligible, the object still experiences a change. This effect can be found in many domains of physics, but can usually be reduced to insignificance by using different instruments or observation techniques. A notable example of the observer effect occurs in quantum mechanics, as demonstrated by the double-slit experiment. Physicists have found that observation of quantum phenomena can change the measured results of this experiment. Despite the "observer effect" in the double-slit experiment being caused by the presence of an electronic detector, the experiment's results have been misinterpreted by some to suggest that a conscious mind can directly affect reality. The need for the "observer" to be conscious is not supported by scientific research, and has been pointed out as a misconception rooted in a poor understanding of the quantum wave function ψ and the quantum measurement process.
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  • 29 Nov 2022
Topic Review Peer Reviewed
Geometric Design of Suburban Roundabouts
A modern roundabout is an intersection with a circulatory roadway at which the vehicle speed is low, and the traffic is continuous and circulating in one direction around the central island towards the exits at the approach legs. Modern roundabout design is an iterative process that is composed of the following steps: (1) the identification of the roundabout as the optimal traffic solution; (2) the definition of the number of lanes at the intersection based on the required capacity and the level of service; (3) the initial design of the roundabout geometry; (4) design vehicle swept path, the fastest path analysis, and visibility performance checks; and (5) detailed roundabout design if the results of the performance checks are in line with the design recommendations. Initial roundabout geometry design elements are not independent of each other; therefore, care must be taken to provide compatibility between them. An overview and a comparative analysis of the initial geometric design elements for suburban single-lane roundabouts defined in roundabout design guidelines and norms used in Croatia, Austria, France, the Netherlands, Germany, Serbia, and Switzerland is given in this entry.
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  • 13 Apr 2022
Topic Review
List of German Aircraft Projects, 1939–45
The aircraft in this list include prototype versions of aircraft used by the German Luftwaffe during World War II and unfinished wartime experimental programmes. In the former, development can stretch back to the 1920s and in the latter the project must have started between 1939-1945.
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  • 14 Oct 2022
Topic Review
Creativity
Creativity, historically known as The (World) Church of the Creator, is an atheistic ("nontheistic") white supremacist religious movement which espouses white separatism, antitheism, antisemitism, scientific racism, homophobia, and religious and philosophical naturalism. Creativity calls itself a "white racialist" religion and it has been classified as a hate group by the Southern Poverty Law Center and the Anti-Defamation League. It was founded in Lighthouse Point, Florida, United States, by Ben Klassen as the "Church of the Creator" in 1973, and now, it has a presence in several states of the US as well as Australia , Eastern Europe and the United Kingdom . Creativity is promoted by two organizations: the Creativity Alliance (CA also known as the Church of Creativity), and The Creativity Movement. The two groups have common origins, both being created in 2003 after Klassen's successor Matthew F. Hale (who had renamed the organisation New Church of the Creator), was arrested and sentenced to 40 years in prison. Purportedly, the worldview of Creativity is naturalistic and racialistic, based on its values which are the "survival, expansion and advancement of the White race", according to what the group classifies as the "eternal laws of nature, the experience of history, on logic and common sense". Members of the group believe in a "racial holy war" between "white and non-White races" (including Jews, black people and non-white people of "mixed race").
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  • 14 Oct 2022
Topic Review
List of Intel Pentium 4 Microprocessors
The Pentium 4 microprocessor from Intel is a seventh-generation CPU targeted at the consumer market.
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  • 02 Oct 2022
Topic Review
Active Pixel Sensor
An active-pixel sensor (APS) is an image sensor where each picture element ("pixel") has a photodetector and an active amplifier. There are many types of integrated circuit active pixel sensors including the complementary metal–oxide–semiconductor (CMOS) APS used most commonly in cell phone cameras, web cameras, most digital pocket cameras since 2010, in most digital single-lens reflex cameras (DSLRs) and Mirrorless interchangeable-lens cameras (MILCs). Such an image sensor is produced using CMOS technology (and is hence also known as a CMOS sensor), and has emerged as an alternative to charge-coupled device (CCD) image sensors. The term 'active pixel sensor' is also used to refer to the individual pixel sensor itself, as opposed to the image sensor; in that case the image sensor is sometimes called an active pixel sensor imager, or active-pixel image sensor.
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  • 23 Nov 2022
Topic Review
Corporate Social Responsibility Preferences in South Africa
A firm’s corporate social responsibility (CSR) approach can encompass a wide variety of activities. These may include philanthropy (donating to charities), volunteering by employees, ethical labor practices, and implementing environmentally friendly operations. Diverse stakeholders and nationalities may view certain social initiatives as less or more important than others. As a result, firms respond by prioritizing those CSR activities that stakeholders in their operating environment consider important. This leads to firms having CSR preferences for some social and environmental activities over others. Traditionally, CSR in South Africa was delivered through corporate social investment (CSI): a philanthropic effort with firms implementing their social responsibility through charitable donations targeted at the education and healthcare of a firm’s surrounding communities.
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  • 13 Apr 2022
Topic Review
Cryptocurrencies in Accounting
The International Financial Reporting Standards Interpretations Committee (IFRSIC) (2019) proposed that the IAS 2 Inventories accounting standard is the accounting rule that best fits the holding of cryptocurrencies. As in the ordinary course of business, when holders want to sell their crypto assets, the best accounting rule is the IAS 2 Inventories. The IFRSIC (2019) also proposed that if the IAS 2 Inventories accounting standard is not appropriate for holdings of cryptocurrencies, another good choice is the IAS 38 Intangible Assets accounting standard. In most cases, IAS 38 will be the best accounting standard for holdings of cryptocurrencies.
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  • 05 May 2022
Topic Review
Sabot
A sabot (UK: /sæˈboʊ, ˈsæboʊ/, US: /ˈseɪboʊ/) is a structural device used in firearm or cannon ammunition to keep a sub-caliber flight projectile, such as a relatively small bullet or arrow-type projectile, in the center of the barrel when fired, if the bullet has a significantly smaller diameter than the bore diameter of the weapon used. The sabot component in projectile design is more than simply the relatively thin, tough and deformable seal known as a driving band or obturation ring needed to trap propellant gases behind a projectile, and also keep the projectile centered in the barrel, when the outer shell of the projectile is only slightly smaller in diameter than the caliber of the barrel. Driving bands and obturators are used to seal these full-bore projectiles in the barrel because of manufacturing tolerances; there always exists some gap between the projectile outer diameter and the barrel inner diameter, usually a few thousandths of an inch; enough of a gap for high pressure gasses to slip by during firing. Driving bands and obturator rings are made from material that will deform and seal the barrel as the projectile is forced from the chamber into the barrel. Small caliber jacketed bullets do not normally employ driving bands or obturators because the jacket material, for example copper or gilding metal, is deformable enough to serve that function, and the bullet is made slightly larger than the barrel for that purpose, (see full metal jacket bullet and driving band). Sabots certainly use driving bands and obturators, because the same manufacturing tolerance issues exist when sealing the saboted projectile in the barrel, but the sabot itself is a more substantial structural component of the in-bore projectile configuration (Drysdale 1978). Refer to the two APFSDS (armor-piercing fin-stabilized discarding sabot) pictures on the right to see the substantial material nature of a sabot to fill the bore diameter around the sub-caliber arrow-type flight projectile, compared to the very small gap sealed by a driving band or obturator to mitigate what is known classically as windage. More detailed cutaways of the internal structural complexity of advanced APFSDS saboted long rod penetrator projectiles can be found at reference 2.
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  • 27 Oct 2022
Topic Review
Big Three TV Networks
In the United States , there are three major traditional commercial broadcast television networks - CBS (Columbia Broadcasting System), NBC (National Broadcasting Company), and ABC (American Broadcasting Company) - that due to their longevity and ratings success are referred to as the "Big Three", which dominated American television until the 1990s, and are still considered major U.S. broadcast companies.
  • 5.3K
  • 08 Oct 2022
Topic Review
Remote Attestation
Remote Attestation (RA) is a security mechanism to remotely detect adversarial presence on untrusted devices in order to guarantee their trustworthiness. RA runs as a two-party security protocol in which a trusted party (i.e., verifier) assures the integrity of the untrusted remote device (i.e., prover). Software-based RA approaches aim at verifying device integrity without relying on specialized hardware components. Despite their limited security guarantees, software-based RA approaches bring opportunities in attesting legacy and resource-constrained Internet of Things (IoT) devices, in which the presence of a hardware root-of-trust is not always a realistic assumption.
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  • 31 Jan 2022
Topic Review
Institutional Translation
Institutional Translation refers to translation activities or translated works initiated or benefited by institutions.
  • 5.3K
  • 02 Sep 2021
Topic Review
Altitude (Triangle)
In geometry, an altitude of a triangle is a line segment through a vertex and perpendicular to (i.e., forming a right angle with) a line containing the base (the side opposite the vertex). This line containing the opposite side is called the extended base of the altitude. The intersection of the extended base and the altitude is called the foot of the altitude. The length of the altitude, often simply called "the altitude", is the distance between the extended base and the vertex. The process of drawing the altitude from the vertex to the foot is known as dropping the altitude at that vertex. It is a special case of orthogonal projection. Altitudes can be used in the computation of the area of a triangle: one half of the product of an altitude's length and its base's length equals the triangle's area. Thus, the longest altitude is perpendicular to the shortest side of the triangle. The altitudes are also related to the sides of the triangle through the trigonometric functions. In an isosceles triangle (a triangle with two congruent sides), the altitude having the incongruent side as its base will have the midpoint of that side as its foot. Also the altitude having the incongruent side as its base will be the angle bisector of the vertex angle. It is common to mark the altitude with the letter h (as in height), often subscripted with the name of the side the altitude is drawn to. In a right triangle, the altitude drawn to the hypotenuse c divides the hypotenuse into two segments of lengths p and q. If we denote the length of the altitude by hc, we then have the relation For acute and right triangles the feet of the altitudes all fall on the triangle's sides (not extended). In an obtuse triangle (one with an obtuse angle), the foot of the altitude to the obtuse-angled vertex falls in the interior of the opposite side, but the feet of the altitudes to the acute-angled vertices fall on the opposite extended side, exterior to the triangle. This is illustrated in the adjacent diagram: in this obtuse triangle, an altitude dropped perpendicularly from the top vertex, which has an acute angle, intersects the extended horizontal side outside the triangle.
  • 5.3K
  • 25 Oct 2022
Topic Review
Loopholes in Bell Tests
In Bell tests, there may be problems of experimental design or set-up that affect the validity of the experimental findings. These problems are often referred to as "loopholes". See the article on Bell's theorem for the theoretical background to these experimental efforts (see also John Stewart Bell). The purpose of the experiment is to test whether nature is best described using a local hidden-variable theory or by the quantum entanglement theory of quantum mechanics. The "detection efficiency", or "fair sampling" problem is the most prevalent loophole in optical experiments. Another loophole that has more often been addressed is that of communication, i.e. locality. There is also the "disjoint measurement" loophole which entails multiple samples used to obtain correlations as compared to "joint measurement" where a single sample is used to obtain all correlations used in an inequality. To date, no test has simultaneously closed all loopholes. Ronald Hanson of the Delft University of Technology claims the first Bell experiment that closes both the detection and the communication loopholes. (This was not an optical experiment in the sense discussed below; the entangled degrees of freedom were electron spins rather than photon polarization.) Nevertheless, correlations of classical optical fields also violate Bell's inequality. In some experiments there may be additional defects that make "local realist" explanations of Bell test violations possible; these are briefly described below. Many modern experiments are directed at detecting quantum entanglement rather than ruling out local hidden-variable theories, and these tasks are different since the former accepts quantum mechanics at the outset (no entanglement without quantum mechanics). This is regularly done using Bell's theorem, but in this situation the theorem is used as an entanglement witness, a dividing line between entangled quantum states and separable quantum states, and is as such not as sensitive to the problems described here. In October 2015, scientists from the Kavli Institute of Nanoscience reported that the quantum nonlocality phenomenon is supported at the 96% confidence level based on a "loophole-free Bell test" study. These results were confirmed by two studies with statistical significance over 5 standard deviations which were published in December 2015. However, Alain Aspect writes that No experiment can be said to be totally loophole-free.
  • 5.3K
  • 31 Oct 2022
Topic Review
Olive Tree (Religious Movement)
Olive Tree is the most common English name of a new religious movement founded in South Korea by Park Tae Son (한국예박태선). The movement was originally known in Korea as Jesus Christ Congregation Revival Association of Korea (한국예수교전도관부흥협회) and later as The Church of Heavenly Father (Cheonbugyo, 천부교). In a revised 2009 version of his 1996 doctoral dissertation on the history of Korean Pentecostalism, pastor Young Hoon Lee called the Olive Tree “the fastest growing and largest of the Korean syncretistic religions during the 1950s and 1960s,” although he noted it had become “largely insignificant” by the end of the 20th century. The Olive Tree is regarded as a cult by mainline Christian denominations in Korea, and it has been argued that combating the Olive Tree was a main reason for the emergence of an organized anti-cult movement in South Korea.
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  • 25 Nov 2022
Topic Review
Internet Pornography
Internet pornography is any pornography that is accessible over the internet, primarily via websites, FTP servers peer-to-peer file sharing, or Usenet newsgroups. The availability of widespread public access to the World Wide Web in late 1990s led to the growth of internet pornography. A 2015 study finds "a big jump" in pornography viewing over the past few decades, with the largest increase occurring between people born in the 1970s and those born in the 1980s. While the study's authors note this increase is "smaller than conventional wisdom might predict," it's still quite significant. Those who were born in the 1980s onward are also the first to grow up in a world where they have access to the internet beginning in their teenage years, and this early exposure and access to internet pornography may be the primary driver of the increase. The sex and tech conference series Arse Elektronika dedicated their 2007 conference to what they call pr0nnovation. The con presented a keynote by culture theorist Mark Dery and published a reader about the subject. (As of 2018), a single company, MindGeek, owns and operates many popular pornographic websites, including video sharing services Pornhub, RedTube, and YouPorn, as well as adult film producers Brazzers, Digital Playground, Men.com, Reality Kings, and Sean Cody, among others, but does not own the websites xHamster and XVideos. It has been alleged to be a monopoly.
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  • 25 Oct 2022
Topic Review
Diamond DA40
The Diamond DA40 Star is an Austrian four-seat, single-engine, light aircraft constructed from composite materials. Built in both Austria and Canada, it was developed as a four-seat version of the earlier DA20 by Diamond Aircraft Industries.
  • 5.3K
  • 04 Nov 2022
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