In mathematics, and more specifically in abstract algebra, a *-algebra (or involutive algebra) is a mathematical structure consisting of two involutive rings R and A, where R is commutative and A has the structure of an associative algebra over R. Involutive algebras generalize the idea of a number system equipped with conjugation, for example the complex numbers and complex conjugation, matrices over the complex numbers and conjugate transpose, and linear operators over a Hilbert space and Hermitian adjoints.
In mathematics, a *-ring is a ring with a map * : A → A that is an antiautomorphism and an involution.
More precisely, * is required to satisfy the following properties:
for all x, y in A.
This is also called an involutive ring, involutory ring, and ring with involution. Note that the third axiom is actually redundant, because the second and fourth axioms imply 1* is also a multiplicative identity, and identities are unique.
Ring (リング, Ringu) is a Japanese mystery horror novel by Koji Suzuki, first published in 1991, and set in modern-day Japan. It was the basis for a 1995 television film (Ring: Kanzenban),a television series (Ring: The Final Chapter), a film of the same name (1998's Ring), and two remakes of the 1998 film: a South Korean version (The Ring Virus) and an American version (The Ring).
After four teenagers mysteriously die simultaneously in Tokyo, Kazuyuki Asakawa, a reporter and uncle to one of the deceased, decides to launch his own personal investigation. His search leads him to "Hakone Pacific Land", a holiday resort where the youths were last seen together exactly one week before their deaths. Once there he happens upon a mysterious unmarked videotape. Watching the tape, he witnesses a strange sequence of both abstract and realistic footage, including an image of an injured man, that ends with a warning revealing the viewer has a week to live. Giving a single means of avoiding death, the tape's explanation ends suddenly having been overwritten by an advertisement. The tape has a horrible mental effect on Asakawa, and he doesn't doubt for a second that its warning is true.
A ringtone or ring tone is the sound made by a telephone to indicate an incoming call or text message. Not literally a tone nor an actual (bell-like) ring any more, the term is most often used today to refer to customizable sounds used on mobile phones.
A phone “rings” when its network indicates an incoming call and the phone thus alerts the recipient. For landline telephones, the call signal can be an electric current generated by the switch or exchange to which the telephone is connected, which originally drove an electric bell. For mobile phones, the network sends the phone a message indicating an incoming call. The sound the caller hears is called the ringback tone, which is not necessarily directly related.
The electromagnetic bell system is still in widespread use. The ringing signal sent to a customer's telephone is 90 volts AC at a frequency of 20 hertz in North America. In Europe it is around 60-90 volts AC at a frequency of 25 hertz. Some non-Bell Company system party lines in the US used multiple frequencies (20/30/40 Hz, 22/33/44 Hz, etc.) to allow "selective" ringing.
Although each installment of the Final Fantasy series is generally set in a different fictional world with separate storylines, there are several commonalities when it comes to character design, as certain design themes repeat themselves, as well as specific character names and classes. Within the main series, Yoshitaka Amano was the character designer for Final Fantasy, Final Fantasy II, Final Fantasy III, Final Fantasy IV, Final Fantasy V and Final Fantasy VI, Tetsuya Nomura was the character designer for Final Fantasy VII, Final Fantasy VIII, Final Fantasy X, Final Fantasy XI and Final Fantasy XIII, Yoshitaka Amano created and did the concept art for the characters while Toshiyuki Itahana was the final character designer for Final Fantasy IX, and Akihiko Yoshida was the character designer for Final Fantasy XII.
The series has often featured male characters with slightly effeminate characteristics, as well as female characters with slightly tomboyish, but still feminine, characteristics. This trend has generally increased as the series evolved. These characters are usually teenagers, which some critics have interpreted as an effort on the part of the designers to ensure the players identify with them. At the same time, some female characters have been increasingly designed to wear very revealing outfits. Square Enix has stated that a more rugged looking hero had been considered for Final Fantasy XII but had ultimately been scrapped in favor of Vaan, another effeminate protagonist. The developers cited scenaristic reasons and target demographic considerations to explain their choice. For Final Fantasy XIII, Square Enix settled on a female main character, described as a "female version of Cloud from FFVII." This aspect of Final Fantasy can also be seen in Sora, the protagonist of Kingdom Hearts, a crossover series featuring Final Fantasy and Disney characters.
In the motion picture industry, a "box office bomb" or "box office flop" is a film that is viewed as highly unsuccessful or unprofitable during its theatrical run, sometimes preceding hype regarding its cost, production, or marketing efforts. Generally, any film for which the production and marketing costs exceed the combined revenue recovered after release is considered to have "bombed".
Gauging the financial success of a film is difficult, and because there is no reliable definition, what makes a "box-office bomb" can be very subjective. Not all films that fail to earn back their estimated costs during their theatrical runs are "bombs," and the label is generally applied to films that miss earnings projections by a wide margin, particularly when they are very expensive to produce, and sometimes in conjunction with middling or poor reviews (though critical reception has an imperfect connection to box office performance).
Beginning in the 1980s, cinemas started to drop movies that suffered a poor opening weekend. This made the performance of a film on its opening weekend much more crucial to its perception. With the growth of the Internet during the 1990s, chat rooms and websites enabled negative word of mouth to spread rapidly.
A bomb is an explosive device.
Bomb may also refer to: