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Observer Office Interior Circa 1905
An observer is one who engages in observation or in watching an experiment. Observer may also refer to: Computer science and information theory * In information theory, any system which receives information from an object * State observer in control theory, a system that models a real system in order to provide an estimate of its internal state * Observer pattern, a design pattern used in computer programming Fiction * ''Observer'' (video game), a cyberpunk horror video game * Observer (''Mystery Science Theater 3000''), a fictional television character * Observers, beings in the television show ''Fringe'' Military * Air observer, an aircrew member * Artillery observer, a front line personnel who directs fire discipline for artillery strikes * Royal Observer Corps, a civil defence organisation, originally tasked with reporting enemy aircraft * Observer, a non-participating officer, or umpire, tasked with observing the actions of soldiers during a field training or military ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Information Theory
Information theory is the scientific study of the quantification (science), quantification, computer data storage, storage, and telecommunication, communication of information. The field was originally established by the works of Harry Nyquist and Ralph Hartley, in the 1920s, and Claude Shannon in the 1940s. The field is at the intersection of probability theory, statistics, computer science, statistical mechanics, information engineering (field), information engineering, and electrical engineering. A key measure in information theory is information entropy, entropy. Entropy quantifies the amount of uncertainty involved in the value of a random variable or the outcome of a random process. For example, identifying the outcome of a fair coin flip (with two equally likely outcomes) provides less information (lower entropy) than specifying the outcome from a roll of a dice, die (with six equally likely outcomes). Some other important measures in information theory are mutual informat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer (APS)
The Association for Psychological Science (APS), previously the American Psychological Society, is an international non-profit organization whose mission is to promote, protect, and advance the interests of scientifically oriented psychology in research, application, teaching, and the improvement of human welfare. APS publishes several journals, holds an annual meeting, disseminates psychological science research findings to the general public, and works with policymakers to strengthen support for scientific psychology. History APS was founded in 1988 by a group of researchers and scientifically-oriented practitioners who were interested in advancing scientific psychology and its representation at the national and international level. This group felt that the American Psychological Association (APA) was not adequately supporting scientific research because it focused on the practitioner/clinician side of psychology, and had effectively "become a guild". Tensions between the scien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer Effect (other)
Observer effect, observer bias, observation bias, etc. may refer to a number of concepts, some of them closely related: General experimental biases * Hawthorne effect, a form of reactivity in which subjects modify an aspect of their behavior, in response to their knowing that they are being studied * Observer-expectancy effect, a form of reactivity in which a researcher's cognitive bias causes them to unconsciously influence the participants of an experiment * Observer bias, a detection bias in research studies resulting for example from an observer's cognitive biases Physics * Observer effect (physics), the impact of observing a physical system * Probe effect, the effect on a physical system of adding measurement devices, such as the probes of electronic test equipment Computing * Heisenbug of computer programming, in which a software bug seems to disappear or alter its behavior when one attempts to study it * Observer effect (information technology), the impact of observin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donald Alaster Macdonald
Donald Alaster Macdonald (6 June 1859 – 23 November 1932) was an Australian journalist and nature writer, writing under the pen names including 'Observer' and 'Gnuyang' (gossip).Hugh Anderson,Macdonald, Donald Alaster (1859–1932), ''Australian Dictionary of Biography'', Vol. 10, Melbourne University Press, 1986, p. 249. Retrieved 14 November 2010 He was considered one of Australia's widely known journalists, and is in the Melbourne Press Club's Australian Media Hall of Fame. He was credited with making 'Australian natural history and botany popular interests'. Early life Macdonald was born in Fitzroy, Victoria, a suburb of Melbourne, the elder son of Donald Macdonald (of Scottish–Canadian heritage) and his wife Margaret, ''née'' Harris. Macdonald was educated at the Keilor state school where he became a pupil-teacher in 1876. He later joined ''The Corowa Free Press'' and then the ''Melbourne Argus'' newspaper in 1881. On 26 February 1883 at Scots' Church, Melbourne, M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enneagram Of Personality
The Enneagram of Personality, or simply the Enneagram (from the Greek words [, meaning "nine"] and [, meaning something "written" or "drawn"]), is a model of the Psyche (psychology), human psyche which is principally understood and taught as a Psychological typologies, typology of nine interconnected personality types. Although the origins and history of many of the ideas and theories associated with the Enneagram of Personality are a matter of dispute, contemporary Enneagram theories are principally derived from the teachings of the Bolivian psycho-spiritual teacher Oscar Ichazo from the 1950s and the Chilean psychiatrist Claudio Naranjo from the 1970s. Naranjo's theories were also influenced by some earlier teachings about personality by George Gurdjieff and the Fourth Way tradition. As a typology, the Enneagram defines nine personality types (sometimes called "enneatypes"), which are represented by the points of a geometric figure called an ''Enneagram (geometry), enneagr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultimate (sport)
Ultimate, originally known as ultimate Frisbee, is a non-contact team sport played with a frisbee flung by hand. Ultimate was developed in 1968 by AJ Gator in Maplewood, New Jersey. Although ultimate resembles many traditional sports in its athletic requirements, it is unlike most sports due to its focus on self-officiating, even at the highest levels of competition. The term Frisbee, often used to generically describe all flying discs, is a registered trademark of the Wham-O toy company, and thus the sport is not formally called "ultimate Frisbee", though this name is still in common casual use. Points are scored by passing the disc to a teammate in the opposing end zone. Other basic rules are that players must not take steps while holding the disc, and interceptions, incomplete passes, and passes out of bounds are turnovers. Rain, wind, or occasionally other adversities can make for a testing match with rapid turnovers, heightening the pressure of play. From its beginnings i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Election Monitoring
Election monitoring involves the observation of an election by one or more independent parties, typically from another country or from a non-governmental organization (NGO). The monitoring parties aim primarily to assess the conduct of an election process on the basis of national legislation and of international election standards. There are national and international election observers. Monitors do not directly prevent electoral fraud, but rather record and report instances of suspicious practices. Election observation increasingly looks at the entire electoral process over a long period of time, rather than at election-day proceedings only. The legitimacy of an election can be affected by the criticism of monitors, unless they are themselves seen as biased. A notable individual is often appointed honorary leader of a monitoring organization in an effort to enhance legitimacy of the monitoring process. History The first monitored election was that of an 1857 plebiscite in Mold ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer Status
Observer status is a privilege granted by some organizations to non-members to give them an ability to participate in the organization's activities. Observer status is often granted by intergovernmental organizations (IGO) to non-member parties and international nongovernmental organizations (INGO) that have an interest in the IGO's activities. Observers generally have a limited ability to participate in the IGO, lacking the ability to vote or propose resolutions. United Nations United Nations General Assembly The United Nations General Assembly may grant entities observer status. The United Nations welcomes many international agencies, entities, and two non-member states as observers, State of Palestine and Vatican City. Observers have the right to speak at United Nations General Assembly meetings, but not to vote on resolutions. Non-member observer states are recognized as sovereign states, and are free to submit a petition to join as a full member at their discretion. At prese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observational Astronomy
Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models. It is the practice and study of observation, observing celestial objects with the use of telescopes and other astronomical instruments. As a space science, science, the study of astronomy is somewhat hindered in that direct experiments with the properties of the distant universe are not possible. However, this is partly compensated by the fact that astronomers have a vast number of visible examples of stellar phenomena that can be examined. This allows for observational data to be plotted on graphs, and general trends recorded. Nearby examples of specific phenomena, such as variable stars, can then be used to infer the behavior of more distant representatives. Those distant yardsticks can then be employed to measure other phenomena ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer (special Relativity)
In special relativity, an observer is a frame of reference from which a set of objects or events are being measured. Usually this is an inertial reference frame or "inertial observer". Less often an observer may be an arbitrary non-inertial reference frame such as a Rindler frame which may be called an "accelerating observer". The special relativity usage differs significantly from the ordinary English meaning of "observer". Reference frames are inherently nonlocal constructs, covering all of space and time or a nontrivial part of it; thus it does not make sense to speak of an observer (in the special relativistic sense) having a location. Also, an inertial observer cannot accelerate at a later time, nor can an accelerating observer stop accelerating. Physicists use the term "observer" as shorthand for a specific reference frame from which a set of objects or events is being measured. Speaking of an observer in special relativity is not specifically hypothesizing an individual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer (quantum Physics)
Some interpretations of quantum mechanics posit a central role for an observer of a quantum phenomenon. The quantum mechanical observer is tied to the issue of observer effect, where a measurement necessarily requires interacting with the physical object being measured, affecting its properties through the interaction. The term "observable" has gained a technical meaning, denoting a Hermitian operator that represents a measurement. The prominence of seemingly subjective or anthropocentric ideas like "observer" in the early development of the theory has been a continuing source of disquiet and philosophical dispute. A number of new-age religious or philosophical views give the observer a more special role, or place constraints on who or what can be an observer. There is no credible peer-reviewed research that backs such claims. As an example of such claims, Fritjof Capra declared, "The crucial feature of atomic physics is that the human observer is not only necessary to observe the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observer (physics)
General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the differential geometry, geometric scientific theory, theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General theory of relativity, relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time in physics, time or four-dimensional space, four-dimensional spacetime. In particular, the ' is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of second order partial differential equations. Newton's law of universal gravitation, which describes classical gravity, can be seen as a prediction of general relativity for the almost flat spacetime geometry around stationary mass distribution ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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