Hasan Ibn al-Haytham was an Arab mathematician, astronomer, and physicist of the Islamic Golden Age. Sometimes called "the father of modern optics", he made significant contributions to the principles of optics and visual perception in particular, his most influential work being his Kitāb al-Manāẓir, written during 1011–1021, which survived in the Latin edition. A polymath, he also wrote on philosophy, theology and medicine.
A conspiracy theory is the fear of a nonexistent or alleged conspiracy or the unnecessary assumption of conspiracy when other explanations are more probable. Evidence showing it to be false, or the absence of proof of the conspiracy, is interpreted by believers as evidence of its truth, thus insulating it from refutation.
Game theory is the study of mathematical models of strategic interaction between rational decision-makers. It has applications in all fields of social science, as well as in logic and computer science. Originally, it addressed zero-sum games, in which one person's gains result in losses for the other participants. Today, game theory applies to a wide range of behavioral relations, and is now an umbrella term for the science of logical decision making in humans, animals, and computers.
Mathematics includes the study of such topics as quantity, structure, space, and change.
Quantum mechanics, including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.
In physics, string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings. It describes how these strings propagate through space and interact with each other. On distance scales larger than the string scale, a string looks just like an ordinary particle, with its mass, charge, and other properties determined by the vibrational state of the string. In string theory, one of the many vibrational states of the string corresponds to the graviton, a quantum mechanical particle that carries gravitational force. Thus string theory is a theory of quantum gravity.
A theory is a contemplative and rational type of abstract or generalizing thinking, or the results of such thinking. Depending on the context, the results might, for example, include generalized explanations of how nature works. The word has its roots in ancient Greek, but in modern use it has taken on several related meanings.
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides. The gravitational attraction of the original gaseous matter present in the Universe caused it to begin coalescing, forming stars – and for the stars to group together into galaxies – so gravity is responsible for many of the large-scale structures in the Universe. Gravity has an infinite range, although its effects become increasingly weaker on farther objects.
Psychology is an academic and applied discipline involving the scientific study of human mental functions and behavior. Occasionally, in addition or opposition to employing the scientific method, it also relies on symbolic interpretation and critical analysis, although these traditions have tended to be less pronounced than in other social sciences, such as sociology. Psychologists study phenomena such as perception, cognition, emotion, personality, behavior, and interpersonal relationships. Some, especially depth psychologists, also study the unconscious mind.
Lordosis behavior, also known as mammalian lordosis or presenting, is the naturally occurring body posture for sexual receptivity to copulation present in most mammals including rodents, elephants, and cats. The primary characteristics of the behavior are a lowering of the forelimbs but with the rear limbs extended and hips raised, ventral arching of the spine and a raising, or sideward displacement, of the tail. During lordosis, the spine curves dorsoventrally so that its apex points towards the abdomen.
The Irish Sport Horse is an Irish breed of warmblood sporting horse, used mostly for dressage, eventing and show-jumping. It was bred from 1923 by cross-breeding of Irish Draught and Thoroughbred stock. There was some limited intromission of Hanoverian, Selle Français and Trakehner blood in the 1990s. It is a recognised true breed – foals may only be registered in the main section of the stud-book if both parents are registered in that section.
Emission theory or extramission theory is the proposal that visual perception is accomplished by eye beams emitted by the eyes. This theory has been replaced by intromission theory, which states that visual perception comes from something representative of the object entering the eyes. Modern physics has confirmed that light is physically transmitted by photons from a light source, such as the sun, to visible objects, and finishing with the detector, such as a human eye or camera.
Marxism is a theory and method of working class self-emancipation. As a theory, it relies on a method of socioeconomic analysis that views class relations and social conflict using a materialist interpretation of historical development and takes a dialectical view of social transformation. It originates from the works of 19th-century German philosophers Karl Marx and Friedrich Engels.
The German Angus is a modern German breed of beef cattle. It was bred in the 1950s in Germany by crossing Aberdeen Angus with various native German cattle breeds: German Black Pied, Deutsche Rotbunte, and Fleckvieh.
The Big Bang Theory is an American television sitcom created by Chuck Lorre and Bill Prady, both of whom serve as executive producers on the series, along with Steven Molaro. All three also serve as head writers. The show premiered on CBS on September 24, 2007. The twelfth and final season, which will run through 2018–19, premiered on September 24, 2018, consisting of 24 episodes.
The Book of Optics is a seven-volume treatise on optics and other fields of study composed by the medieval Arab scholar Ibn al-Haytham, known in the West as Alhazen or Alhacen.
Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experimental tools to probe these phenomena.
The Cornigliese or Corniglio is a breed of domestic sheep from the Apennines of the province of Parma, in Emilia–Romagna in central Italy. It takes its name from the mountain town of Corniglio in that province; it may also be called Borgotarese after the town of Borgo Val di Taro which is about 40 km to the west. It is raised in the provinces of Bologna, Ferrara, Modena, Parma, Ravenna and Reggio Emilia.
