Eye movement

Eye movement refers to the voluntary or involuntary movement of the eyes, helping in acquiring, fixating and tracking visual stimuli. Specific systems are used in maintaining fixation, when reading and in music reading. A special type of eye movement, rapid eye movement, occurs during REM sleep.

The eyes are the visual organs of the human body, and move using a system of six muscles. The retina, a specialised type of tissue containing photoreceptors, senses light. These specialised cells convert light into electrochemical signals. These signals travel along the optic nerve fibers to the brain, where they are interpreted as vision in the visual cortex.

Primates and many other vertebrates use three types of voluntary eye movement to track objects of interest: smooth pursuit, vergence shifts and saccades. These movements appear to be initiated by a small cortical region in the brain's frontal lobe. This is corroborated by removal of the frontal lobe. In this case, the reflexes (such as reflex shifting the eyes to a moving light) are intact, though the voluntary control is obliterated.

Version

Version may refer to:

Computing

Music

Albums

Other uses

See also

CONFIG.SYS

CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems. It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system during boot. CONFIG.SYS was introduced with DOS 2.0.

Usage

The directives in this file configure DOS for use with devices and applications in the system. The CONFIG.SYS directives also set up the memory managers in the system. After processing the CONFIG.SYS file, DOS proceeds to load and execute the command shell specified in the SHELL line of CONFIG.SYS, or COMMAND.COM if there is no such line. The command shell in turn is responsible for processing the AUTOEXEC.BAT file.

CONFIG.SYS is composed mostly of name=value directives which look like variable assignments. In fact, these will either define some tunable parameters often resulting in reservation of memory, or load files, mostly device drivers and TSRs, into memory.

In DOS, CONFIG.SYS is located in the root directory of the drive from which the system was booted.

Version 3.0 (album)

Version 3.0 is the third studio album by French Canadian singer Marie-Mai. The album was produced by Fred St-Gelais. The album received platinum certification on 1 February 2011 for more than 80,000 copies sold.

Track listing

Personnel

References

Eye

Eyes are the organs of vision. They detect light and convert it into electro-chemical impulses in neurons. In higher organisms, the eye is a complex optical system which collects light from the surrounding environment, regulates its intensity through a diaphragm, focuses it through an adjustable assembly of lenses to form an image, converts this image into a set of electrical signals, and transmits these signals to the brain through complex neural pathways that connect the eye via the optic nerve to the visual cortex and other areas of the brain. Eyes with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in molluscs, chordates and arthropods.

The simplest "eyes", such as those in microorganisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment and to the pretectal area to control the pupillary light reflex.

Bud

In botany, a bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of a stem. Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately. Buds may be specialized to develop flowers or short shoots, or may have the potential for general shoot development. The term bud is also used in zoology, where it refers to an outgrowth from the body which can develop into a new individual.

Overview

The buds of many woody plants, especially in temperate or cold climates, are protected by a covering of modified leaves called scales which tightly enclose the more delicate parts of the bud. Many bud scales are covered by a gummy substance which serves as added protection. When the bud develops, the scales may enlarge somewhat but usually just drop off, leaving on the surface of the growing stem a series of horizontally-elongated scars. By means of these scars one can determine the age of any young branch, since each year's growth ends in the formation of a bud, the formation of which produces an additional group of bud scale scars. Continued growth of the branch causes these scars to be obliterated after a few years so that the total age of older branches cannot be determined by this means.

Eye (magazine)

For the Toronto-based weekly see Eye Weekly.

Eye magazine, the international review of graphic design, is a quarterly print magazine on graphic design and visual culture.

History

First published in London in 1990, Eye was founded by Rick Poynor, a prolific writer on graphic design and visual communication. Poynor edited the first twenty-four issues (1990-1997). Max Bruinsma was the second editor, editing issues 25–32 (1997–1999), before its current editor John L. Walters took over in 1999. Stephen Coates was art director for issues 1-26, Nick Bell was art director from issues 27-57, and Simon Esterson has been art director since issue 58.

Frequent contributors include Phil Baines, Steven Heller, Steve Hare, Richard Hollis, Robin Kinross, Jan Middendorp, J. Abbott Miller, John O’Reilly, Rick Poynor, Alice Twemlow, Kerry William Purcell, Steve Rigley, Adrian Shaughnessy, David Thompson, Christopher Wilson and many others.

Other contributors have included Nick Bell (creative director from issues 27-57), Gavin Bryars, Anne Burdick, Brendan Dawes, Simon Esterson (art director since issue 58), Malcolm Garrett, Anna Gerber, Jonathan Jones, Emily King, Ellen Lupton, Russell Mills, Quentin Newark, Tom Phillips, Robin Rimbaud, Stefan Sagmeister, Sue Steward, Erik Spiekermann, Teal Triggs, Val Williams and Judith Williamson.