Div

Div or DIV may refer to:

Science and technology

Other uses

See also

Unison

In music, unison is two or more musical parts sounding the same pitch or at an octave interval, usually at the same time.

Rhythmic patterns which are homorhythmic are also called unison.

Interval of the unison

Unison or perfect unison (also called a prime, or perfect prime) may refer to the (pseudo-)interval formed by a tone and its duplication (in German, Unisono, Einklang, or Prime), for example C–C, as differentiated from the second, C–D, etc. In the unison the two pitches have the ratio of 1:1 or 0 half steps and zero cents. Although two tones in unison are considered to be the same pitch, they are still perceivable as coming from separate sources, whether played on instruments of a different type:  play unison on C, piano and guitar ; or of the same type:  play unison on C, two pianos . This is because a pair of tones in unison come from different locations and/or can have different "colors" (timbres), i.e. come from different musical instruments or human voices. Voices with different colors have, as sound waves, different waveforms. These waveforms have the same fundamental frequency but differ in the amplitudes of their higher harmonics. The unison is considered the most consonant interval while the near unison is considered the most dissonant. The unison is also the easiest interval to tune. The unison is abbreviated as P1.

Daeva

Daeva (daēuua, daāua, daēva) is an Avestan language term for a particular sort of supernatural entity with disagreeable characteristics. In the Gathas, the oldest texts of the Zoroastrian canon, the daevas are "wrong gods" or "false gods" or "gods that are (to be) rejected". This meaning is – subject to interpretation – perhaps also evident in the Old Persian "daiva inscription" of the 5th century BCE. In the Younger Avesta, the daevas are noxious creatures that promote chaos and disorder. In later tradition and folklore, the dēws (Zoroastrian Middle Persian; New Persian divs) are personifications of every imaginable evil.

Daeva, the Iranian language term, should not be confused with the devas of Indian religions. While the word for the Vedic spirits and the word for the Zoroastrian entities are etymologically related, their function and thematic development is altogether different. The once-widespread notion that the radically different functions of Iranian daeva and Indic deva (and ahura versus asura) represented a prehistoric inversion of roles is no longer followed in 21st century academic discourse (see In comparison with Vedic usage for details).

Span and div

In HTML, span and div elements are used to define parts of a document so that they are identifiable when no other HTML element is suitable. While other HTML elements such as p (paragraph), em (emphasis) and so on accurately represent the semantics of the content, the use of span and div leads to better accessibility for readers and easier maintainability for authors. Where no existing HTML element is applicable, span and div can valuably represent parts of a document so that HTML attributes such as class, id, lang, or dir can be applied.

span represents an inline portion of a document, for example words within a sentence. div represents a block-level portion of a document such as a few paragraphs, or an image with its caption. Neither element has any meaning in itself but they allow semantic attributes (e.g. lang="en-US"), CSS styling (e.g. color, typography) or client-side scripting (e.g. animation, hiding, augmentation) to be applied.

History

The span element was introduced to HTML in the internationalization working group's second draft html-i18n in 1995. However, it was not until HTML 4.01 that it became part of the HTML language, appearing in the HTML 4 W3C Working Draft in 1997.

C mathematical functions

C mathematical operations are a group of functions in the standard library of the C programming language implementing basic mathematical functions. All functions use floating point numbers in one manner or another. Different C standards provide different, albeit backwards-compatible, sets of functions. Most of these functions are also available in the C++ standard library, though in different headers (the C headers are included as well, but only as a deprecated compatibility feature).

Overview of functions

Most of the mathematical functions are defined in math.h (cmath header in C++). The functions that operate on integers, such as abs, labs, div, and ldiv, are instead defined in the stdlib.h header (cstdlib header in C++).

Any functions that operate on angles use radians as the unit of angle.

Not all of these functions are available in the C89 version of the standard. For those that are, the functions accept only type double for the floating-point arguments, leading to expensive type conversions in code that otherwise used single-precision float values. In C99, this shortcoming was fixed by introducing new sets of functions that work on float and long double arguments. Those functions are identified by f and l suffixes respectively.

Befuraline

Befuraline (DIV-154) is a psychoactive drug and member of the piperazine chemical class which was developed in Germany in the 1970s. Befuraline has stimulant and antidepressant effects and has seen some use in Germany and France, although it has never become widely used. Befuraline's active metabolite benzylpiperazine is responsible for its effects.

See also

References