UNDA
UNDA may refer to:
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.
Ground (unit)
A ground is a unit of area used in India approximately equal to 203 square metres (2,185 ft²). After metrication in the mid-20th century, the unit is being phased out. However, it is still popular in Real Estate parlance.
One ground is commonly taken as 2400 square feet and approximately one half ground is used as a small and standard lot to construct a small individual house in small towns in India. In olden times houses used to adjoin and have common walls. In modern constructions one sees this in the construction of condominiums or so-called flats only. It is still in vogue in villages for economic reasons.
See also
References
"Ground". Sizes, grades, units, scales, calendars, chronologies. Retrieved 2007-01-20. External link in |work= (help)
Ground (Dzogchen)
In Dzogchen Ground (Tibetan: གཞི, Wylie: gzhi ; IAST: āśraya or sthāna) is the primordial state. It is an essential component of the Dzogchen tradition for both the Bonpo and the Nyingmapa. Knowledge of this Ground is called rigpa.
Etymology
The Tibetan: གཞི, Wylie: gzhi has been rendered as 'Base', 'Basis', 'Ground' and 'Ground of Being' amongst other English glosses. According to Dudjom the original Sanskrit-term is āśraya (IAST; Sanskrit Devanagari: आश्रय; Etymology: आ- √श्रि), but it could also be sthāna.
Sam van Schaik states that gzhi is to be distinguished from kun gzhi. In the Seminal Heart series a distinction is made between kun gzhi, c.q. ālaya, "the base of it all", the samsaric basis of consciousness, of all the samsaric appearances; and gzhi, "the nirvanic basis known as the ground."
Three qualities
According to the Dzogchen-teachings, the Ground or Buddha-nature has three qualities:
Podcasts:
