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Noisefields (1974)
The Video ''Noisefields'' (1974) by Steina and Woody Vasulka is an important example of early formal and technical experimentation with analog video. The video runs for twelve minutes and five seconds and materially visualizes the deflected energy of the electronic signal. The video switches between two sources throughout, which creates a flickering effect. The imagery is based on the deflection of electronic signals, and a colorizer is used to add color variation. In the video, a circular form materializes on the screen and presents a division between inner and outer. A pulsation between the two is sustained throughout. The Signal The Vasulkas were among the first video artists to experiment with the signal, and the potential to delay its feedback or multiply waveforms to create new imagery. Their approach directly intervened with the directional movement of the signal. They wanted to transform line configurations by shifting the direction of the signal's constant horizontal and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Still Image Of Noiselfields
A still is an apparatus used to distill liquid mixtures by heating to selectively boil and then cooling to condense the vapor. A still uses the same concepts as a basic distillation apparatus, but on a much larger scale. Stills have been used to produce perfume and medicine, water for injection (WFI) for pharmaceutical use, generally to separate and purify different chemicals, and to produce distilled beverages containing ethanol. Application Since ethanol boils at a much lower temperature than water, simple distillation can separate ethanol from water by applying heat to the mixture. Historically, a copper vessel was used for this purpose, since copper removes undesirable sulfur-based compounds from the alcohol. However, many modern stills are made of stainless steel pipes with copper linings to prevent erosion of the entire vessel and lower copper levels in the waste product (which in large distilleries is processed to become animal feed). Copper is the preferre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steina And Woody Vasulka
Steina Vasulka (born Steinunn Briem Bjarnadottir in 1940) Soros Center for Contemporary Arts Budapest and Woody Vasulka (born Bohuslav Vašulka on 20 January 1937 – 20 December 2019) are early pioneers of , and have been producing work since the early 1960s. The couple met in the early 1960s and moved to in 1965, where they began showing video art at the and founded |
Feedback
Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to ''feed back'' into itself. The notion of cause-and-effect has to be handled carefully when applied to feedback systems: History Self-regulating mechanisms have existed since antiquity, and the idea of feedback had started to enter economic theory in Britain by the 18th century, but it was not at that time recognized as a universal abstraction and so did not have a name. The first ever known artificial feedback device was a float valve, for maintaining water at a constant level, invented in 270 BC in Alexandria, Egypt. This device illustrated the principle of feedback: a low water level opens the valve, the rising water then provides feedback into the system, closing the valve when the required level is reached. This then reoccurs in a circular fashion as the water level fluctuates. Centrifugal governors were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waveforms
In electronics, acoustics, and related fields, the waveform of a signal is the shape of its graph as a function of time, independent of its time and magnitude scales and of any displacement in time.David Crecraft, David Gorham, ''Electronics'', 2nd ed., , CRC Press, 2002, p. 62 In electronics, the term is usually applied to periodically varying voltages, currents, or electromagnetic fields. In acoustics, it is usually applied to steady periodic sounds—variations of pressure in air or other media. In these cases, the waveform is an attribute that is independent of the frequency, amplitude, or phase shift of the signal. The term can also be used for non-periodic signals, like chirps and pulses. The waveform of an electrical signal can be visualized in an oscilloscope or any other device that can capture and plot its value at various times, with a suitable scales in the time and value axes. The electrocardiograph is a medical device to record the waveform of the electr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raster Image
upright=1, The Smiley, smiley face in the top left corner is a raster image. When enlarged, individual pixels appear as squares. Enlarging further, each pixel can be analyzed, with their colors constructed through combination of the values for red, green and blue. In computer graphics and digital photography, a raster graphic represents a two-dimensional picture as a rectangular matrix or grid of square pixels, viewable via a computer display, paper, or other display medium. A raster is technically characterized by the width and height of the image in pixels and by the number of bits per pixel. Raster images are stored in image files with varying dissemination, production, generation, and acquisition formats. The printing and prepress industries know raster graphics as contones (from ''continuous tones''). In contrast, line art is usually implemented as vector graphics in digital systems. Many raster manipulations map directly onto the mathematical formalisms of linear alg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog Signal
An analog signal or analogue signal (see spelling differences) is any continuous signal representing some other quantity, i.e., ''analogous'' to another quantity. For example, in an analog audio signal, the instantaneous signal voltage varies continuously with the pressure of the sound waves. In contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized values which imposes some bandwidth and dynamic range constraints on the representation. The term ''analog signal'' usually refers to electrical signals; however, mechanical, pneumatic, hydraulic and other systems may also convey or be considered analog signals. Representation An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. In an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rutt/Etra Video Synthesizer
The Rutt/Etra Video Synthesizer is an analog raster manipulation device for image processing and real-time animation. The Rutt/Etra was co-invented by Steve Rutt and Bill Etra. See also *Scanimate {{about, the computer animation system, the animation effect, Barrier grid animation and stereography Scanimate is an analog computer animation (video synthesizer) system developed from the late 1960s to the 1980s by Computer Image Corporation of D ... – a similar device References External linksAudio Vizualizers page on Rutt / Etra Video Synthesizer Image processing {{tech-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steve Rutt
Steven Alexander Rutt (February 26, 1945 – May 20, 2011) was an American engineer who in 1972, along with Bill Etra, co-created an early video animation synthesizer, the Rutt/Etra Video Synthesizer. His equipment was used in the early pioneering synthesized animation for the 1976 Academy Award winning movie Network Network, networking and networked may refer to: Science and technology * Network theory, the study of graphs as a representation of relations between discrete objects * Network science, an academic field that studies complex networks Mathematics .... Steve Rutt, an Inventor Behind Early Video Animation, Dies at 66. He was the founder of Rutt Video & Interactive, a Manhattan-based video post-production studio [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bill Etra
William Etra (March 27, 1947 – August 26, 2016) was a live video pioneer and the co-inventor (with Steve Rutt) of the Rutt/Etra Video Synthesizer. Etra was born in Manhattan and raised in Lawrence, Nassau County, New York. Etra worked briefly as a professional cameraman, then studied film at New York University. He began teaching experimental television at NYU before he graduated. In 1971, Etra and video artists Steina and Woody Vasulka started a performance space at The Kitchen. Using the Rutt-Etra synthesizer, Etra made ''Narcissikon'' with his wife Louise.“This was my first Rutt-Etra piece. The initial picture is Louise sitting against a black background. She’s got an output monitor she can watch, and I put it in a circle wipe, feed it into the Rutt-Etra synthesizer, get a white line wipe, put Louise’s face into that, take it out of the Rutt-Etra, and outline it in the synthesizer, and Louise is on the intercom, and she’s talking to me and I’m talking to her, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voltage
Voltage, also known as electric pressure, electric tension, or (electric) potential difference, is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to move a test charge between the two points. In the International System of Units, the derived unit for voltage is named ''volt''. The voltage between points can be caused by the build-up of electric charge (e.g., a capacitor), and from an electromotive force (e.g., electromagnetic induction in generator, inductors, and transformers). On a macroscopic scale, a potential difference can be caused by electrochemical processes (e.g., cells and batteries), the pressure-induced piezoelectric effect, and the thermoelectric effect. A voltmeter can be used to measure the voltage between two points in a system. Often a common reference potential such as the ground of the system is used as one of the points. A voltage can represent either a source ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Op Art
Op art, short for optical art, is a style of visual art that uses optical illusions. Op artworks are abstract, with many better-known pieces created in black and white. Typically, they give the viewer the impression of movement, hidden images, flashing and vibrating patterns, or swelling or warping. History The antecedents of op art, in terms of graphic and color effects, can be traced back to Neo-impressionism, Cubism, Futurism, Constructivism and Dada. László Moholy-Nagy produced photographic op art and taught the subject in the Bauhaus. One of his lessons consisted of making his students produce holes in cards and then photographing them. ''Time'' magazine coined the term ''op art'' in 1964, in response to Julian Stanczak's show ''Optical Paintings at the Martha Jackson Gallery'', to mean a form of abstract art (specifically non-objective art) that uses optical illusions. Works now described as "op art" had been produced for several years before ''Time's'' 1964 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neuropsychological
Neuropsychology is a branch of psychology concerned with how a person's cognition and behavior are related to the brain and the rest of the nervous system. Professionals in this branch of psychology often focus on how injuries or illnesses of the brain affect cognitive and behavioral functions. It is both an experimental and clinical field of psychology, thus aiming to understand how behavior and cognition are influenced by brain function and concerned with the diagnosis and treatment of behavioral and cognitive effects of neurological disorders. Whereas classical neurology focuses on the pathology of the nervous system and classical psychology is largely divorced from it, neuropsychology seeks to discover how the brain correlates with the mind through the study of neurological patients. It thus shares concepts and concerns with neuropsychiatry and with behavioral neurology in general. The term ''neuropsychology'' has been applied to lesion studies in humans and animals. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
