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Computer animation is the process used for digitally generating animated images. The more general term computer-generated imagery (CGI) encompasses both static scenes and dynamic images, while computer animation only refers to moving images. Modern computer animation usually uses 3D computer graphics to generate a three-dimensional picture, although 2D computer graphics are still used for stylistic, low bandwidth, and faster real-time renderings. Sometimes, the target of the animation is the computer itself, but sometimes film as well.

Computer animation is essentially a digital successor to stop motion techniques, but using 3D models, and traditional animation techniques using frame-by-frame animation of 2D illustrations. Computer-generated animations can also allow a single graphic artist to produce such content without the use of actors, expensive set pieces, or props. To create the illusion of movement, an image is displayed on the computer monitor and repeatedly replaced by a new image that is similar to it but advanced slightly in time (usually at a rate of 24, 25, or 30 frames/second). This technique is identical to how the illusion of movement is achieved with television and motion pictures.

For 3D animations, objects (models) are built on the computer monitor (modeled) and 3D figures are rigged with a virtual skeleton. For 2D figure animations, separate objects (illustrations) and separate transparent layers are used with or without that virtual skeleton. Then the limbs, eyes, mouth, clothes, etc. of the figure are moved by the animator on key frames. The differences in appearance between key frames are automatically calculated by the computer in a process known as tweening or morphing. Finally, the animation is rendered.

For 3D animations, all frames must be rendered after the modeling is complete. For 2D vector animations, the rendering process is the key frame illustration process, while tweened frames are rendered as needed. For pre-recorded presentations, the rendered frames are transferred to a different format or medium, like digital video. The frames may also be rendered in real time as they are presented to the end-user audience. Low bandwidth animations transmitted via the internet (e.g. Adobe Flash, X3D) often use software on the end-user's computer to render in real time as an alternative to streaming or pre-loaded high bandwidth animations.

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Spring Branch Independent School District is a school district headquartered in Hedwig Village, Texas, United States in Greater Houston. The district serves portions of western Houston, including most of Spring Branch. It also serves several small municipalities known as the Memorial Villages in its jurisdiction, such as Hedwig Village and Spring Valley Village. A majority of the district lies within Houston city limits.

The school district's boundaries include Hempstead Road to the northeast (formerly US 290), Interstate 610 to the east, Clay Road to the north, the Addicks Dam to the west, and Buffalo Bayou to the south. Spring Branch serves 35,000 kindergarten through 12th grade students and includes a region with 188,000 residents.

The Spring Branch ISD area is served by the Houston Community College System, but it is not within the tax base.

SBISD is not to be confused with the Spring Independent School District, also located in the Greater Houston area (the latter is located in the northern portion of the region).

There are currently four traditional high schools (grades 9-12), one of which is 6A, and three 5A high schools, eight middle schools (grades 6-8), and twenty-six elementary schools (grades K-5), and six early education Pre-K centers in the district. Three more high school centers serve students in grades 9-12 with various purposes, including one public charter school.

In 2009, the school district was rated "academically acceptable" by the Texas Education Agency.

Cushing Academy is a private, coeducational college-preparatory school for boarding and day students in Ashburnham, Massachusetts, United States. It serves approximately 400 students in grades 9–12 and a postgraduate year.

Polyisobutene (polyisobutylene) is a class of organic polymers prepared by polymerization of isobutene. The polymers often have the formula Me3C[CH2CMe2]nX (Me = CH3, X = H, F). They are typically colorless gummy solids.

Polymerization is typically initiated with a strong Bronsted or Lewis acid. The molecular weight (MW) of the resulting polymer determines the applications. Low MW polyisobutene, a mixture of oligomers with Mns of about 500, is used as plasticizers. Medium and high MW polyisobutenes, with Mn ≥ 20,000, are components of commercial adhesives.

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The pebibit is a multiple of the bit, a unit of digital information storage, prefixed by the standards-based multiplier pebi (symbol Pi), a binary prefix meaning 250. The unit symbol of the pebibit is Pibit.

The pebibit is closely related to the petabit, the corresponding unit using the metric prefix peta, which is 1015 bits.

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