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🔗 Russia 🔗 Dogs 🔗 Russia/science and education in Russia 🔗 Genetics

The domesticated silver fox is a form of the silver fox that has been to some extent domesticated under laboratory conditions. The silver fox is a melanistic form of the wild red fox. Domesticated silver foxes are the result of an experiment designed to demonstrate the power of selective breeding to transform species, as described by Charles Darwin in On the Origin of Species. The experiment at the Institute of Cytology and Genetics in Novosibirsk, Siberia explored whether selection for behaviour rather than morphology may have been the process that had produced dogs from wolves, by recording the changes in foxes when in each generation only the most tame foxes were allowed to breed. Many of the descendant foxes became both tamer and more dog-like in morphology, including displaying mottled or spotted coloured fur.

In 2019, an international research team questioned the conclusion that this experiment had provided strong support for the validity of domestication syndrome. They did conclude that it remains "a resource for investigation of the genomics and biology of behavior".

🔗 United States 🔗 Companies 🔗 Retailing 🔗 Home Living 🔗 United States/Nebraska - Omaha

Nebraska Furniture Mart is the largest home furnishing store in North America selling furniture, flooring, appliances and electronics. NFM was founded in 1937 by Belarus-born Rose Blumkin, universally known as Mrs. B., in Omaha, Nebraska, United States. Under the motto "sell cheap and tell the truth," she worked in the business until age 103. In 1983, Mrs. B. sold a majority interest to Berkshire Hathaway in a handshake deal with Warren Buffett.

🔗 Computing 🔗 Computing/Computer hardware

The floppy disk is a data storage and transfer medium that was ubiquitous from the mid-1970s well into the 2000s. Besides the 3½-inch and 5¼-inch formats used in IBM PC compatible systems, or the 8-inch format that preceded them, many proprietary floppy disk formats were developed, either using a different disk design or special layout and encoding methods for the data held on the disk.

🔗 Mathematics

In mathematics, Young's lattice is a partially ordered set and a lattice that is formed by all integer partitions. It is named after Alfred Young, who, in a series of papers On quantitative substitutional analysis, developed representation theory of the symmetric group. In Young's theory, the objects now called Young diagrams and the partial order on them played a key, even decisive, role. Young's lattice prominently figures in algebraic combinatorics, forming the simplest example of a differential poset in the sense of Stanley (1988). It is also closely connected with the crystal bases for affine Lie algebras.

🔗 Birds

Brood parasites are organisms that rely on others to raise their young. The strategy appears among birds, insects and fish. The brood parasite manipulates a host, either of the same or of another species, to raise its young as if it were its own, using brood mimicry, for example by having eggs that resemble the host's (egg mimicry).

Brood parasitism relieves the parasitic parents from the investment of rearing young or building nests for the young, enabling them to spend more time on other activities such as foraging and producing further offspring. Bird parasite species mitigate the risk of egg loss by distributing eggs amongst a number of different hosts. As this behaviour damages the host, it often results in an evolutionary arms race between parasite and host as the pair of species coevolve.

The strength of defenses and counter-adaptation rely on the host/parasitic species' ability to evolve; some host species have very strong rejection defenses resulting in the parasitic species evolving to have very close mimicry. In other species, hosts do not show rejection defenses and as a result, the parasitic species will show no evolved trait (example: egg mimicry).

🔗 Business 🔗 Psychology 🔗 Marketing & Advertising 🔗 Sociology 🔗 Media 🔗 Retailing 🔗 Home Living

Overchoice or choice overload is the paradoxical phenomenon that choosing between a large variety of options can be detrimental to decision making processes. The term was first introduced by Alvin Toffler in his 1970 book, Future Shock.

🔗 Law

In contract law, a non-compete clause (often NCC), or covenant not to compete (CNC), is a clause under which one party (usually an employee) agrees not to enter into or start a similar profession or trade in competition against another party (usually the employer). Some courts refer to these as "restrictive covenants". As a contract provision, a CNC is bound by traditional contract requirements including the consideration doctrine.

The use of such clauses is premised on the possibility that upon their termination or resignation, an employee might begin working for a competitor or start a business, and gain competitive advantage by exploiting confidential information about their former employer's operations or trade secrets, or sensitive information such as customer/client lists, business practices, upcoming products, and marketing plans.

However, an over-broad CNC may prevent an employee from working elsewhere at all. English common law originally held any such constraint to be unenforceable under the public policy doctrine. Contemporary case law permits exceptions, but generally will only enforce CNCs to the extent necessary to protect the employer. Most jurisdictions in which such contracts have been examined by the courts have deemed CNCs to be legally binding so long as the clause contains reasonable limitations as to the geographical area and time period in which an employee of a company may not compete.

The extent to which non-compete clauses are legally allowed varies per jurisdiction. For example, the state of California in the United States invalidates non-compete-clauses for all but equity stakeholders in the sale of business interests.

In computational learning theory, induction of regular languages refers to the task of learning a formal description (e.g. grammar) of a regular language from a given set of example strings. Although Mark E. Gold has shown that not every regular language can be learned this way (see language identification in the limit), approaches have been investigated for a variety of subclasses. They are sketched in this article. For learning of more general grammars, see Grammar induction.

🔗 Technology 🔗 Science Fiction 🔗 Transhumanism

Gray goo (also spelled grey goo) is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass on Earth while building more of themselves, a scenario that has been called ecophagy ("eating the environment", more literally "eating the habitation"). The original idea assumed machines were designed to have this capability, while popularizations have assumed that machines might somehow gain this capability by accident.

Self-replicating machines of the macroscopic variety were originally described by mathematician John von Neumann, and are sometimes referred to as von Neumann machines or clanking replicators. The term gray goo was coined by nanotechnology pioneer K. Eric Drexler in his 1986 book Engines of Creation. In 2004 he stated, "I wish I had never used the term 'gray goo'." Engines of Creation mentions "gray goo" in two paragraphs and a note, while the popularized idea of gray goo was first publicized in a mass-circulation magazine, Omni, in November 1986.

🔗 Olympics 🔗 Lists 🔗 Arts

There were 146 medalists in the art competitions that were part of the Olympic Games from 1912 until 1948. These art competitions were considered an integral part of the movement by International Olympic Committee (IOC) founder Pierre de Coubertin and necessary to recapture the complete essence of the Ancient Olympic Games. Their absence before the 1912 Summer Olympics, according to journalism professor Richard Stanton, stems from Coubertin "not wanting to fragment the focus of his new and fragile movement". Art competitions were originally planned for inclusion in the 1908 Summer Olympics but were delayed after that edition's change in venue from Rome to London following the 1906 eruption of Mount Vesuvius. By the 1924 Summer Olympics they had grown to be considered internationally relevant and potentially "a milestone in advancing public awareness of art as a whole".

During their first three appearances, the art competitions were grouped into five broad categories: architecture, literature, music, painting, and sculpture. The Dutch Organizing Committee for the 1928 Summer Olympics split these into subcategories in the hopes of increasing participation. Although it was a successful strategy, the 1932 Summer Olympics eliminated several of these subcategories, which led to fewer entries in the broader categories. For the 1936 Summer Olympics, the German government proposed the addition of a film contest to the program, which was rejected.

Following a final appearance at the 1948 Summer Olympics, art competitions were removed from the Olympic program. Planners of the 1952 Summer Olympics opposed their inclusion on logistical grounds, claiming that the lack of an international association for the event meant that the entire onus of facilitation was placed on the local organizing committee. Concerns were also raised about the professionalism of the event, since only amateurs were allowed to participate in the sporting tournaments, and the growing commercialization of the competitions, as artists had been permitted to sell their submissions during the course of the Games since 1928. In 1952 an art festival and exhibition was held concurrent with the Games, a tradition that has been maintained in all subsequent Summer Olympics.

The IOC does not track medalists in Olympic art competitions in its database and thus the prize winners are only officially recorded in the original Olympic reports. Judges were not required to distribute first, second, and third place awards for every category, and thus certain events lack medalists in these placements. Since participants were allowed multiple submissions, it was also possible for artists to win more than one in a single event, as Alex Diggelmann of Switzerland did in the graphic arts category of the 1948 edition. Diggelmann is tied with Denmark's Josef Petersen, who won second prize three times in literature, for the number of medals captured in the art competitions. Luxembourg's Jean Jacoby is the only individual to win two gold medals, doing so in painting in 1924 and 1928. Of the 146 medalists, 11 were women and only Finnish author Aale Tynni was awarded gold. Germany was the most successful nation, with eight gold, seven silver, and nine bronze medals, although one was won by Coubertin himself, a Frenchman. He submitted his poem Ode to Sport under the pseudonyms Georges Hohrod and Martin Eschbach, as if it were a joint-entry, and won first prize in the 1912 literature category. The original report credits this medal to Germany. Two individuals, Walter W. Winans and Alfréd Hajós, won medals in both athletic and art competitions.