Return

Return may refer to:

In business, economics, and finance

In technology

In entertainment

Film

Return (2011 film)

Return is a 2011 independent film about an American reservist, wife and mother returning home from her tour of duty in the Middle East. The film was written and directed by Liza Johnson, and stars Linda Cardellini, Michael Shannon and John Slattery. It is Johnson's first feature-length film, and received good reviews at its premiere at the Cannes Film Festival Directors' Fortnight.

Synopsis

Kelli, returning from her military tour of duty in the Middle East, has high hopes for resuming her old life in her midwestern hometown. Her hopes are gradually dashed as her relationships with her family and friends suffer; they have moved on, and she cannot adjust. She is unable to provide the attention her children need, she quits her dull factory job, she discovers her husband Mike's infidelity, drinks with her friends, then is stopped by the police while driving under the influence. During her court-ordered therapy session, she meets Bud, a charming war veteran. She undergoes a gradual breakdown, but persists in her efforts to reestablish her life.

Returning

In retail, a return is the process of a customer taking previously purchased merchandise back to the retailer, and in turn receiving a refund in the original form of payment, exchange for another item (identical or different), or a store credit.

Many retailers will accept returns provided that the customer has a receipt as a proof of purchase, and that certain other conditions, which depend on the retailer's policies, are met. These may include the merchandise being in a certain condition (usually resellable if not defective), no more than a certain amount of time having passed since the purchase, and sometimes that identification be provided (though usually only if a receipt is not provided). In some cases, only exchanges or store credit are offered, again usually only without a receipt, or after an initial refund period has passed. Some retailers charge a restocking fee for non-defective returned merchandise, but typically only if the packaging has been opened.

While retailers are not usually required to accept returns, laws in many places require retailers to post their return policy in a place where it would be visible to the customer prior to purchase.

Helix

A helix (pl: helixes or helices) is a type of smooth space curve, i.e. a curve in three-dimensional space. It has the property that the tangent line at any point makes a constant angle with a fixed line called the axis. Examples of helices are coil springs and the handrails of spiral staircases. A "filled-in" helix – for example, a spiral ramp – is called a helicoid. Helices are important in biology, as the DNA molecule is formed as two intertwined helices, and many proteins have helical substructures, known as alpha helices. The word helix comes from the Greek word ἕλιξ, "twisted, curved".

Types

Helices can be either right-handed or left-handed. With the line of sight along the helix's axis, if a clockwise screwing motion moves the helix away from the observer, then it is called a right-handed helix; if towards the observer, then it is a left-handed helix. Handedness (or chirality) is a property of the helix, not of the perspective: a right-handed helix cannot be turned to look like a left-handed one unless it is viewed in a mirror, and vice versa.

Phelix

Phelix is a high-speed stream cipher with a built-in single-pass message authentication code (MAC) functionality, submitted in 2004 to the eSTREAM contest by Doug Whiting, Bruce Schneier, Stefan Lucks, and Frédéric Muller. The cipher uses only the operations of addition modulo 2³², exclusive or, and rotation by a fixed number of bits. Phelix uses a 256-bit key and a 128-bit nonce, claiming a design strength of 128 bits. Concerns have been raised over the ability to recover the secret key if the cipher is used incorrectly.

Performance

Phelix is optimised for 32-bit platforms. The authors state that it can achieve up to eight cycles per byte on modern x86-based processors.

FPGA Hardware performance figures published in the paper "Review of stream cipher candidates from a low resource hardware perspective" are as follows:

Helix

Phelix is a slightly modified form of an earlier cipher, Helix, published in 2003 by Niels Ferguson, Doug Whiting, Bruce Schneier, John Kelsey, Stefan Lucks, and Tadayoshi Kohno; Phelix adds 128 bits to the internal state.

Helix (multimedia project)

Helix DNA is a project to produce computer software that can play audio and video media in various formats, aid in producing such media, and serve them over a network. It is intended as a largely free and open source digital media framework that runs on numerous operating systems and processors (including mobile phones) and was started by RealNetworks which contributed much of the code. The Helix Community is an open collaborative effort to develop and extend the Helix DNA platform.

Helix DNA Client is a software package for multi-platform multi-format media playback. Helix Player is a media player that runs on Linux, Solaris, Symbian and FreeBSD and uses the Helix DNA Client. The Helix DNA Producer application aids in the production of media files, and Helix DNA Server can stream media files over a network.

Licenses

The code is released in binary and source code form under various licenses, notably the proprietary RealNetworks Community Source License and the free and open source software RealNetworks Public Source License. Additionally, the Helix DNA Client and the Helix Player are licensed under the popular GNU General Public License (GPL) free and open source license.