| 单词 | oscillator |
| 例句 | But as Lawrence informed Cottrell, the magnet would require its own building and a brand-new array of high-powered oscillators and other accessories. Big Science 2015-07-07T00:00:00Z The phenomenon by which protons keep time with the oscillator even as they accelerate came to be known as “resonance.” Big Science 2015-07-07T00:00:00Z Malcolm Henderson, working on the cyclotron in the next room, was used to hearing the X-ray workers shout to make themselves heard over the thrum of the tube’s oscillator. Big Science 2015-07-07T00:00:00Z The challenge then becomes timing the electrical impulses so they energize the gap at the very moment the particles cross, which means generating them from an oscillator working at a fixed frequency. Big Science 2015-07-07T00:00:00Z Reflecting Lawrence’s lack of conceit when it came to engineering, the machine incorporated the latest innovations of cyclotroneers across the country in designs for transformers, power transmission, the oscillator, and the ion source. Big Science 2015-07-07T00:00:00Z In under a minute, he has built an oscillator to match the schematic. All the Light We Cannot See 2014-05-06T00:00:00Z The construction helps to avoid a loss of energy by the oscillator, which regulates the speed of the movement, when it encounters air resistance. Unfazed by Change, Swiss Watch Houses Embrace Technology 2013-04-24T15:32:37Z It is intended to be the first member of a family of movements incorporating both the DIAMonSIL escapement and an adjustable oscillator fitted with a silicium hairspring. Precise Future of Silicon Parts Still Being Debated 2012-11-23T13:35:46Z Berberian's party piece was to do vocal impressions of electronic music, but not for her the bathtime combination of oscillator and filter. You are the synthesiser: John Cage's experiments with the human voice 2011-03-17T21:59:01Z “Let’s hit that oscillator with everything we’ve got!”—echo through the cinema like the barks of excited dogs. “Star Wars: The Force Awakens” Reviewed 2015-12-18T05:00:00Z The voice is a "synthesiser", he says, made up of "various oscillators producing sounds of definite pitch", and he describes how to transform the sounds produced by these oscillators. You are the synthesiser: John Cage's experiments with the human voice 2011-03-17T21:59:01Z In short, the van der Pol oscillator is a clamorous rebuttal to the popular notion that all things, from people to nations to galaxies, are supposed to exist in some state of serene harmony. Possessed: There?s No Quiet Without Noise 2011-07-08T19:39:07Z Square waves from two oscillators would be mixed together, and then pushed through a combination of instrument-emulating filters, which were apparently modelled on the frequencies found in the human vocal tract. Hey, what's that sound: Casiotone 2010-07-13T09:43:00Z The band took their name from the acronym for low-frequency oscillators, synthesiser effects often heard in club music. Electronic music pioneer Bell dies 2014-10-14T04:00:00Z That device was designed to phase 12 separate oscillator pulses, creating gradually shifting melodic patterns. Steve Reich at 80: Still Plugged In, Still Plugging Away 2016-09-30T04:00:00Z But after two performances, the machine had a glitch, causing the oscillator pulses to hiccup or shudder randomly. Steve Reich at 80: Still Plugged In, Still Plugging Away 2016-09-30T04:00:00Z A selection of improvisations showed Mr. Kosugi, often joined by his collaborators, exploring the whines, crackles and hisses created by different electronic devices, including wireless oscillators and receivers. Review: In ‘Takehisa Kosugi: Music Expanded,’ Violinist Uses More Than Strings and a Bow 2015-09-14T04:00:00Z More interesting were his wave oscillator works: the lilting Still Lives with composer Frank Denyer at the piano, or Bird and Person Dyning with Lucier hooked up to electronic birdcalls and carefully pacing the stalls. Tectonics – review 2013-05-14T18:27:54Z Sometimes an oscillator would emit a loud wailing and lots of other children would gather round the instrument like a magnet, rather than run away. Moon Wiring Club: music for children, by children 2010-11-24T14:04:00Z This steady signal was then transmitted to an oscillator, an electronic circuit that regulated the gears that turned the watch hands. Still ticking: The improbable survival of the luxury watch business | Simon Garfield 2016-10-19T04:00:00Z One of her first projects was to arrange the score for “Dr. Who,” a laborious process in the predigital, presynthesizer era, which involved analyzing frequencies and reconstructing sounds by using oscillators. Review: Exploring the Work of Delia Derbyshire, an Unsung (but Often Heard) Pioneer 2016-01-04T05:00:00Z And then the pause, before the great whirling racket of gongs and oscillators and clocks and a violin and laughter. Hail, Hail, Rock'n'Roll 2010-08-11T22:00:00Z He is also known for extensive electronic improvisations that make use of oscillators, synthesizers, tape recorders and flashlights, among others. Review: In ‘Takehisa Kosugi: Music Expanded,’ Violinist Uses More Than Strings and a Bow 2015-09-14T04:00:00Z Meant to represent a gradual rise in the earth’s resonant frequency, the piece starts with a low, rumbling tone produced with an oscillator, operated here by Shelley Burgon. Music Review: Pauline Oliveros and Olivia Block Find the Unconventional 2013-09-15T22:03:58Z Its was an artificial jungle, a plastic landscape with oscillators for birdcalls and woofers for roars, and a place for inscrutable ritual. Music Review: The Trippy ?60s in a Guggenheim Time Machine 2010-03-06T08:06:00Z You've become an oscillator – your vocal cords producing the main note – and a filter – changing the mouth shape to emphasise particular overtones. You are the synthesiser: John Cage's experiments with the human voice 2011-03-17T21:59:01Z I like to think future generations will wonder at how a man armed with nothing but a tape machine and a few oscillators journeyed so far. The Rest is Noise festival: what's your favourite piece of 20th-century music? 2012-11-29T20:00:02Z For 45 minutes, the players listened intently, their sounds colliding and fusing as Ms. Burgon gradually raised the oscillator’s frequency to the point at which, in theory, the planet’s magnetic poles shift alignment. Music Review: Pauline Oliveros and Olivia Block Find the Unconventional 2013-09-15T22:03:58Z Sometimes they wouldn't work in the heat, other times the oscillators would drift. Play on: Google posts synthesizer tribute to Moog 2012-05-23T21:02:47Z Using tools like amplifiers, cables, pulleys, transformers and oscillators to create novel sounds, her sonic experiments anticipated the music software programs and apps that are commonplace today. She Brought New Sounds to Colombia. The World’s Catching Up. 2023-01-20T05:00:00Z Jerry-built by the sender, it’s a updated rendering of an obscure invention Mr. Gleick described in the book: a van der Pol oscillator. Possessed: There?s No Quiet Without Noise 2011-07-08T19:39:07Z He had plans to construct a multiple wave oscillator that would utilize a high voltage Tesla coil to rejuvenate biological tissue. Finding Yourself in Los Angeles 2018-07-23T04:00:00Z He fed simple melodies and rhythms into an oscillator, then listened and responded as the machine turned the phrases into patterns, rich with analog detail and, somehow, the free-flowing feeling of a conversation. Kanye West Dips a Toe in the Moment, and 10 More New Songs 2020-07-03T04:00:00Z A special component in the setup, known as an optical parametric oscillator, was used to shift the comb teeth from the near-infrared to the mid-infrared colors absorbed by CO2. New frequency comb can identify molecules in 20-nanosecond snapshots 2023-10-30T04:00:00Z “We require that all oscillators operate at known frequencies, and with certified frequency stability.” Are Telescopes on the Moon Doomed? 2023-03-09T05:00:00Z The student finds that a standing wave with one antinode is formed on the string when the frequency of the oscillator is f0. College Physics for AP Courses 2015-08-12T00:00:00Z That could even be useful in perfecting devices that use oscillators, such as computers, watches, radios and metal detectors. You Hear the Musical Saw. These Mathematicians Heard Geometry. 2022-05-01T04:00:00Z BLC1 most likely originated from a human-built radio emitting oscillator on Earth that contaminated the telescope side lobes with an intrinsic frequency drift. Did We Receive a Message from a Planet Orbiting the Nearest Star? 2021-01-12T05:00:00Z But the optical parametric oscillator can also be tuned to other regions of the mid-infrared so that the combs can detect other molecules that absorb light in those regions. New frequency comb can identify molecules in 20-nanosecond snapshots 2023-10-30T04:00:00Z True, it used to be dangerously addicting to some of us, but not so much now that nearly all of the theoretically possible gun and oscillator periods have been found. The Lasting Lessons of John Conway’s Game of Life 2020-12-28T05:00:00Z The student then moves the oscillator to shorten the horizontal segment of string to half its original length. College Physics for AP Courses 2015-08-12T00:00:00Z A plaque outside the home where they worked on their first product, an audio oscillator, calls it the birthplace of Silicon Valley, the “world’s first high-technology region.” Hewlett Packard Enterprise to move headquarters to Texas 2020-12-02T05:00:00Z With two modes, Traditional and Modern, it enables thereminists to switch between heterodyne analog and digital oscillators. Moog’s limited-edition theremin marks 100 years of weird sounds 2020-10-22T04:00:00Z But the band's destiny changed after a friend introduced Coxe to an oscillator - a very primitive forerunner of the synthesizer - that had been built in the 1940s. Synth pioneer Simeon Coxe of Silver Apples dies 2020-09-09T04:00:00Z Electronic transitions in atoms are perfect natural oscillators for this purpose. Mass spectrometry for future atomic clocks 2020-05-05T04:00:00Z One special thing is that the period T and frequency f of a simple harmonic oscillator are independent of amplitude. College Physics for AP Courses 2015-08-12T00:00:00Z In conventional electronics, IV&V relies on fundamental units such as transistors, diodes, capacitors and oscillators. A controlled trial for reproducibility 2020-03-09T04:00:00Z Moog is revered for the fat sounds its oscillators and filters produce, and the Sub Phatty took things one step further. Moog’s new synth promises big bass in a pint-sized machine 2020-01-17T05:00:00Z A mess of riffs, oscillators and pounding, Baker pushed Dave Block and company’s hard rock in ways that predicted desert rock heroes Kyuss and Queens of the Stone Age. Ten wild, waaay out-there Ginger Baker drum performances 2019-10-07T04:00:00Z The biological clock is thought to be a form of oscillator, perhaps analogous to a pendulum. From the archive 2019-05-06T04:00:00Z Because the period is constant, a simple harmonic oscillator can be used as a clock. College Physics for AP Courses 2015-08-12T00:00:00Z The Matriarch boasts four of these analog oscillators. Moog’s new limited edition Matriarch is a powerful analog synth 2019-04-25T04:00:00Z Calculations can be performed, precise predictions made, and specific observations assessed to see whether they meet the criteria of a similar system of coupled oscillators—in this case, the movements of two Japanese macaques. How playing music for rhesus monkeys is teaching us about our own brains 2019-03-03T05:00:00Z They used an architecture consisting of an oscillator in the form of an atomic ion that is free to oscillate along one axis of an electromagnetic trap. Promising ways to encode and manipulate quantum information 2019-02-26T05:00:00Z Some might be put off by digital oscillators, but this also means the sounds you’ll get from the MicroFreak will be very diverse, from traditional noises you would expect from a synth to the otherworldly. 5 of our favorite synths from NAMM 2019 2019-02-01T05:00:00Z The speed of the tip may exceed the speed of sound in tissue, thus creating shock waves and cavitation, rather than a smooth simple harmonic oscillator–type wave. College Physics for AP Courses 2015-08-12T00:00:00Z The authors use their measurements to apply a feedback force to a mechanical oscillator — an object akin to a vibrating drumhead — to greatly suppress the oscillator’s motion. Mechanical quantum systems controlled 2018-10-30T04:00:00Z The question here was: Could the macaques synchronize or “entrain” with the sound they heard in the same way that coupled oscillators do? How playing music for rhesus monkeys is teaching us about our own brains 2019-03-03T05:00:00Z Around 1890, he designed the basic circuits for a radio apparatus, which he called an oscillator. Lessons From Tesla (the Man, Not the Car) 2018-09-14T04:00:00Z Using the epitaxial superconductor as the source load of the transistor, we observe in the transistor output characteristics a negative differential resistance—a feature often used in amplifiers and oscillators. GaN/NbN epitaxial semiconductor/superconductor heterostructures 2018-03-06T05:00:00Z Camera flashes use a battery, two inductors that function as a transformer, and a switching system or oscillator to induce large voltages. College Physics for AP Courses 2015-08-12T00:00:00Z One such area under development is cavity quantum optomechanics, in which laser light inside an optical cavity is used to control the motion of a mechanical oscillator. Mechanical quantum systems controlled 2018-10-30T04:00:00Z He called radio an “oscillator” through which electricity is converted into high-frequency radio waves, enabling energy, sound and other transmissions over great distances. Tesla the Car Is a Household Name. Long Ago, So Was Nikola Tesla. 2017-12-30T05:00:00Z They describe pedestrians moving in this manner as non-smooth oscillators in their models. The Bridge Wobbles. So Do You. That’s When the Trouble Starts. 2017-11-10T05:00:00Z Individual oscillators, be they fireflies, heart muscles, or metronomes, can end up vibrating in synchrony as a result of some kind of cross-talk—or some common influence. Sloshing of Earth’s core may spike major earthquakes 2017-10-30T04:00:00Z The oscillator system will do this many times as the battery voltage is boosted to over one thousand volts. College Physics for AP Courses 2015-08-12T00:00:00Z Using this approach, the team achieved a mean thermal occupation of approximately 0.3, which means that the oscillator was in the ground state for more than 75% of the time. Mechanical quantum systems controlled 2018-10-30T04:00:00Z They guessed that its oscillator, which allows it to accept a wide range of frequencies, had quit, essentially shrinking the target for transmissions from Earth. The Loyal Engineers Steering NASA’s Voyager Probes Across the Universe 2017-08-03T04:00:00Z Now imagine a whole bunch of you in a crowd — hundreds of non-smooth oscillators. The Bridge Wobbles. So Do You. That’s When the Trouble Starts. 2017-11-10T05:00:00Z To Bendick, it didn’t seem a far jump to consider the faults that cause earthquakes, with their cyclical buildup of strain and violent discharge, as “really noisy, really crummy oscillators,” she says. Sloshing of Earth’s core may spike major earthquakes 2017-10-30T04:00:00Z Using the quantization of oscillators, Planck was able to correctly describe the experimentally known shape of the blackbody spectrum. College Physics for AP Courses 2015-08-12T00:00:00Z They used voltage-controlled oscillators to generate sound waves intended to resemble an acoustic drum set and an electric bass. Letter of Recommendation: Detroit Techno 2017-07-13T04:00:00Z Barton Prorok, a materials-engineering professor at Auburn, is trying to build what he calls a “poor man’s” 3-D printer using vacuum tubes from old televisions and oscillators, rather than a laser. There’s an Antidote to America’s Long Economic Malaise: College Towns 2016-12-12T05:00:00Z I built all of it except for the oscillator.” Bristol man takes snow making into his own hands 2016-01-09T05:00:00Z But they are also simply astonishing to watch, even if you don’t choose to delve deeper into the study of “Lagrangian coherent structures in the flow field of a fluidic oscillator.” When the Situation Is Fluid, Sit Back and Watch 2015-12-21T05:00:00Z This is exactly consistent with Planck’s quantization of energy levels in blackbody oscillators, since these oscillators increase and decrease their energy in steps of hf by absorbing and emitting photons having E = hf . College Physics for AP Courses 2015-08-12T00:00:00Z After the trip, she said, HP’s founders “went away to their garage and they invented a product, and that product was called the audio oscillator.” Candidates Stick to Script, if Not the Truth, in 2016 Race 2015-11-07T05:00:00Z The upshot was that—just like the signals from natural mechanoreceptors—when more pressure is applied, the oscillators turn out pulses at a higher frequency. Sensors may soon give prosthetics a lifelike sense of touch 2015-10-15T04:00:00Z Beneath that layer is an inkjet-printed circuit, called an oscillator, which turns the variable current into a train of pulses. 'Digital skin' activates brain cells - BBC News 2015-10-15T04:00:00Z Gabriella was kept on an oscillator, which kept her gently jiggling. Indiana baby born weighing less than 2 pounds has big impact 2015-02-24T05:00:00Z A periodic force driving a harmonic oscillator at its natural frequency produces resonance. College Physics for AP Courses 2015-08-12T00:00:00Z The audio oscillator, they said, was not created in response to a request from Walt Disney. Candidates Stick to Script, if Not the Truth, in 2016 Race 2015-11-07T05:00:00Z Apparently there was a data problem with the McClellan oscillator after last Friday’s close as the normally very reliable vendor corrected their data after Tuesday’s close. Are the Transports Turning the Corner? 2015-01-21T05:00:00Z The McClellan oscillator is still holding well above both the late August and early September lows. The Week Ahead: Is This the Beginning of the End? 2014-10-10T04:00:00Z The two Stanford University graduates scored their first big customer in 1940 with the Walt Disney Company, which bought their audio oscillators to make the movie “Fantasia.” Latest news: Ebola, Same-Sex Marriage, Samsung 2014-10-07T04:00:00Z If the spring constant of a simple harmonic oscillator is doubled, by what factor will the mass of the system need to change in order for the frequency of the motion to remain the same? College Physics for AP Courses 2015-08-12T00:00:00Z In today’s Trading Lesson, I am going to share some examples of how I use the McClellan oscillator. A Top-Notch Tool for Market Timing 2014-08-23T04:00:00Z It now shows a close in the oscillator on January 16 of -7. Are the Transports Turning the Corner? 2015-01-21T05:00:00Z The oscillator turned lower Friday, consistent with a pullback early this week. The Week Ahead: A September Buying Opportunity? 2014-08-23T04:00:00Z The oscillator action is likely a sign of strength so a pullback is likely to be a buying opportunity. Top Stocks From One of the Biggest Bulls 2014-08-20T04:00:00Z At what positions is the speed of a simple harmonic oscillator half its maximum? College Physics for AP Courses 2015-08-12T00:00:00Z Using off-the-shelf components, the Texas investigators' acoustic oscillator suppressed the amount of sound traveling in the undesired direction by 10,000. A One-Way Street for Sound 2014-04-10T13:00:00Z After all, even Hewlett and Packard, the spiritual godfathers of the Valley, got their start building audio oscillators for Disney, a technology that was first developed more than 40 years before. Silicon Valley Isn't Innovative, It's Iterative: Four Proof Points 2014-04-08T14:52:00Z Generally, musicians combine a number of different oscillators and then use a low pass filter to shave off the harsh brightness of the sound. How to make music (and money) from shortwave radio 2014-03-31T23:09:00Z The boxes would just require some inexpensive memory and cheap clocks—crystal oscillators like those used in digital watches—to remind them to download programming data in the middle of the night, according to Chu. Another Way Cable Companies Are Ripping You Off, According to Steven Chu 2014-02-14T13:43:00Z What percentage of the mechanical energy of the oscillator is lost in each cycle? College Physics for AP Courses 2015-08-12T00:00:00Z This works by combining basic waveforms generated by two or more oscillators to produce a more complex wave, which is then filtered to remove certain frequencies, which is why it is described as subtractive. Small Firms Are Making Big Bucks In The Analog Economy 2014-01-13T16:40:00Z After that, he and his team must reduce the environmental disturbances on the oscillator until it is sensitive to the impact of a single photon. Physicists Eye Quantum-Gravity Interface 2013-11-05T21:15:00.387Z Firing up the lasers When researchers attempt ignition, a bank of capacitors charges up and triggers a flash of light at the master oscillator that generates 192 laser beams. Pressure for Results Mounts as Fusion Research Crawls Forward 2013-10-16T19:15:00.427Z The interference models suggest that grid patterns emerge from velocity-dependent beat frequencies in the membrane potential formed by interference between multiple theta oscillators at slightly different frequencies. The entorhinal grid map is discretized 2012-12-11T21:22:10.423Z Figure 16.9 An object attached to a spring sliding on a frictionless surface is an uncomplicated simple harmonic oscillator. College Physics for AP Courses 2015-08-12T00:00:00Z This apparatus is simply another realization of the atom-cavity coupled oscillator; if an atom were to remain inside the cavity indefinitely, it would exchange a photon with the cavity at some characteristic rate. Cavity Quantum Electrodynamics 2012-10-09T20:45:02.517Z The goal is to put the oscillator in a quantum superposition of two vibration modes, and then see whether gravity destabilizes the superposition. Physicists Eye Quantum-Gravity Interface 2013-11-05T21:15:00.387Z The Valley began as a center for electronics hardware design in the late 1930s, when Bill Hewlett and David Packard built an audio oscillator that Walt Disney used in the production of the movie “Fantasia.” Silicon Valley’s Hardware Renaissance 2012-08-25T19:48:56Z Pressing the button also recorded the position of the dot on the oscillator electronically, allowing the time from volition to action to be measured. The Question: Do footballers know what they're doing? 2012-05-29T10:35:35Z Two important factors do affect the period of a simple harmonic oscillator. College Physics for AP Courses 2015-08-12T00:00:00Z He also showed a clock so constructed that it could be attached to one of the oscillators, and would keep absolutely correct time. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Tests of the timing system turned up a second, opposing effect: an oscillator within the master clock that keeps time between the arrivals of synchronization signals was running fast. Timing glitches dog neutrino claim 2012-02-29T18:20:41.853Z On the one hand, the team said there is a problem in the "oscillator" that provides a ticking clock to the experiment in the intervals between the synchronisations of GPS equipment. Flaw found in fast neutrino story 2012-02-23T11:02:18Z Let us imagine two metal rods placed in line and constituting what is called a linear oscillator. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Such a system is also called a simple harmonic oscillator. College Physics for AP Courses 2015-08-12T00:00:00Z I propose to seek for the period by means of an electrical oscillator, or a source of alternating electric currents. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Stochastic oscillators also remain above a reading of 70, signaling crude is overbought. Oil Declines a Second Day on Increasing Crude Supplies, Europe 2012-01-06T07:48:29Z This device controlled the wheels’ rotation and transmitted the power required to maintain the motion of the oscillator, the part that regulated the speed at which the timekeeper operated. A Chronicle of Timekeeping 2011-12-31T05:15:09.740Z We may say that the transmitting aerial, the receiving aerial and the earth form one gigantic Hertz oscillator. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Give an example of a simple harmonic oscillator, specifically noting how its frequency is independent of amplitude. College Physics for AP Courses 2015-08-12T00:00:00Z Among them was one in which he attached to his oscillator a ring magnet with a small air gap between the poles. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z A typical phenomenon that is studied in introductory physics is the harmonic oscillator. [Essay] Spore* Series winner: Open Source Physics 2011-11-24T19:25:43.493Z That afternoon, Eli Lief, a 16-year-old from the East Village, dropped by for help with an oscillator, which he was using to align a tape machine. | Williamsburg: Leeds Radio Is a Haven for Lovers of All Things Analog 2011-11-20T02:38:42Z The antenna plays the part of one of the metal plates in the Hertz oscillator. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z This revolutionary idea looks similar to Planck’s quantization of energy states in blackbody oscillators, but it is quite different. College Physics for AP Courses 2015-08-12T00:00:00Z Mr. Tesla, also exhibited some models of his oscillators. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z I installed myself there one night, also a simple little electric oscillator. Sentiment, Inc. 2011-10-09T02:00:23.850Z Australia’s largest baker, retailer Pumpkin Patch Ltd., and Rakon Ltd., which supplies crystal oscillators for global positioning systems, were the three biggest decliners this year on the benchmark gauge. New Zealand, Last Bastion of Stock Gains, Succumbs to Crisis 2011-09-23T10:18:02Z So what Hertz did was to set his oscillator going so that it threw waves upon a reflecting surface and then move his detector to and fro in the neighbourhood until he found the nodes. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z Any exogenous control, or environmental variable, can be looked on simply as a timing oscillator. The Breeding Birds of Kansas 2011-08-27T02:00:24.797Z These two inventions Mr. Tesla called, quite appropriately, a mechanical and an electrical oscillator, respectively. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z The index’s 14-day stochastic oscillator was 4.5 today, below the 20 threshold that indicates to some traders an asset’s price has fallen too quickly and is poised to reverse course. Dollar Falls Before Debt-Limit Vote; Aussie Climbs to Record 2011-07-27T04:47:01Z The kiwi’s 14-day stochastic oscillator against the greenback climbed to 96, above the 80 threshold that suggests to some traders an asset’s price has risen too quickly. Euro Gains Versus Dollar on Bets Europeans Will Reach Debt Deal 2011-07-20T20:27:01Z For, with our 50-watt oscillator tube set we will be able to communicate by telegraph up to 500 miles. The Radio Boys Rescue the Lost Alaska Expedition 2011-06-06T02:00:10.330Z This conclusion is warranted if we examine what would happen to frequency distributions if the variables or oscillators regulating timing were linked. The Breeding Birds of Kansas 2011-08-27T02:00:24.797Z Thus, he provides properly calculated chambers, as in the case illustrated, in the oscillator itself; or he associates with the oscillator an air spring of constant resilience. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z These beams are much more monochromatic than those from other light sources; at their best optical masers rival the very finest electronic oscillators as a source of a single frequency. 100 Years Ago: Science of the Unfit 2011-05-25T12:15:00.260Z The euro rebounded from near a three-week low versus the dollar as its 14-day stochastic oscillator chart fell to about 16, below the threshold of 20 that signals an asset is poised to reverse direction. Dollar Falls as Recovery Signs Boost Higher-Yielding Currencies 2010-12-22T10:24:01Z For sending up to 500 miles, the boys knew they could use either three or four 5-watt oscillator tubes in parallel, or one 50-watt oscillator tube. The Radio Boys Rescue the Lost Alaska Expedition 2011-06-06T02:00:10.330Z Such regulators, or environmental oscillators, are the "phasing factors" of the physiologic clock that dictate the temporal occurrence of primary reproductive activity. The Breeding Birds of Kansas 2011-08-27T02:00:24.797Z A magnetic frame M M is fastened so as to closely surround the oscillator and is provided with energizing coils which establish two strong magnetic fields on opposite sides. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z The euro rebounded from near a three-week low versus the dollar as its 14-day stochastic oscillator chart fell to about 13, below the threshold of 20 that signals an asset is poised to reverse direction. Yen Declines Versus Euro, Snaps 5-Day Gain, Amid Recovery Signs 2010-12-22T06:10:02Z The euro rebounded from near a three-week low versus the dollar as its 14-day stochastic oscillator chart fell to 12, below the threshold of 20 that signals an asset is poised to reverse direction. Yen Falls Versus Euro, Snaps 5-Day Gain, as Asian Stocks Rally 2010-12-22T04:34:40Z HP did a lot more than invent oscillators and high-end calculators. A Geeky Summer Reading Challenge 2010-06-21T10:00:00Z It would seem that some oscillators are linked to one another, but there is a real question concerning the over-all degree to which linkage is present. The Breeding Birds of Kansas 2011-08-27T02:00:24.797Z It cited as an example substandard Global Positioning System oscillators used for navigation on more than 4,000 Air Force and Navy systems. Report says military vulnerable to bum parts 2010-04-29T17:56:00Z Markus Aspelmeyer of the University of Vienna believes that the mechanical oscillator approach will, in time, prove its worth in the business of quantum computing. Limits of quantum world stretched 2010-03-17T19:16:00Z I had expected to signal them from the shore, a dock or something of the sort, using this oscillator to get around that fellow's wireless. The Social Gangster This change in frequency is achieved by varying the electrical capacitance in the tuned circuit of the oscillator. LRL Accelerators The 184-Inch Synchrocyclotron Let us assume that each of the environmental variables is a nonlinear oscillator, as is probable. The Breeding Birds of Kansas 2011-08-27T02:00:24.797Z Each instrument would feed its information to the oscillator, through the measurand transmitter and into the telemetering circuit, traveling by radio circuit back to the blockhouse. The Scarlet Lake Mystery "What they've shown here is a mechanical oscillator as a completely new quantum system, and I personally think it's a really important one," he told BBC News. Limits of quantum world stretched 2010-03-17T19:16:00Z "Right here," sang out Craig, detaching the oscillator and replacing the electric bulb, which he lighted. The Social Gangster One set of blades operates at its natural frequency as a tuning-fork oscillator. LRL Accelerators The 184-Inch Synchrocyclotron We do not obtain such distributions in describing breeding activity, so we may say that the oscillators regulating such activity are not coupled. The Breeding Birds of Kansas 2011-08-27T02:00:24.797Z He traced the circuit to where it disappeared into the oscillator switch, then took the walkie-talkie. The Scarlet Lake Mystery He is an oscillator, a pendulum, a wave of the sea, a weathercock. Talkers With Illustrations The same oscillator," he went on, "is used for sending and receiving, for, like the ordinary electric motor it is also capable of acting as a generator, and a very efficient one, too. The Social Gangster This is to prevent the oscillator from exciting lateral rf resonances. LRL Accelerators The 184-Inch Synchrocyclotron Amateur transmitting sets usually have oscillators which run at well over a million cycles per second. Letters of a Radio-Engineer to His Son He found the thermocouple that would be attached to the marmoset's body, traced the circuit to the oscillator, then called, "Watch my own body heat." The Scarlet Lake Mystery It was that; a storage place of batteries and current oscillators, I afterward learned. Astounding Stories, May, 1931 They can tell the quartz oscillator is stopped. Astounding Stories of Super-Science, August 1930 This is a counting register operated by a crystal controlled oscillator. Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) October, 1960 First let’s see how to control the frequency of an audion oscillator like that of Fig. Letters of a Radio-Engineer to His Son In 1895-6 William Rutherford set up at the Cavendish Laboratory apparatus by which he received signals in distant parts of Cambridge up to a distance of half a mile from the oscillator. The War in the Air; Vol. 1 The Part played in the Great War by the Royal Air Force You know how a quartz crystal oscillator in a radio-control apparatus will break, if you work it on a very heavy load at the peak? The Ultimate Weapon He then determined the wave length of Electric Radiation as produced by various oscillators. Sir Jagadis Chunder Bose His Life and Speeches An oscillator sounded a shrill and rising note, and Seaton slowly shifted his controls until he stood in the control room of the enemy vessel. Skylark Three One rule, then, for increasing the frequency of an audion oscillator is to decrease the inductance. Letters of a Radio-Engineer to His Son The apparatus he mentioned was simply a high-frequency oscillator tube of extreme power which caused vibrations approaching light frequency to be set up in the molecules of the ship. Islands of Space Wade, will you connect that to the high frequency oscillator there—no—through that counterbalanced condenser. The Black Star Passes First, he would need an oscillator to produce the complex pulse. Tom Swift and the Electronic Hydrolung "Well, the timers on the oscillators," Troy replied. Sabotage in Space You remember we can make dots and dashes by the key or switch in the oscillator circuit. Letters of a Radio-Engineer to His Son Here they heard the soft purring of a large oscillator tube and the indistinguishable murmur of smoothly running AC generators powered by large contraterrene reactors. Islands of Space We may have to change the oscillator frequency quite a bit, but a variable condenser will do that. The Black Star Passes They then radiated a signal at this frequency, modulated at the frequency to which the local oscillator was set. Tom Swift and The Visitor from Planet X Smaller oscillators must be used—very much smaller—oscillators not much bigger than molecules. Scientific American Supplement, No. 717, September 28, 1889 Suppose that when we depress the switch in the oscillator circuit and so start the oscillations that the sliding contact is at o as shown. Letters of a Radio-Engineer to His Son To detect the electromagnetic waves Hertz employed a simple form of oscillator, which he termed a resonator. The Dawn of Amateur Radio in the U.K. and Greece: a personal view This put the powerful Arcot oscillator tubes into action, and the power was ready for application. The Black Star Passes The second method is an efficient one, as the direct current is varied before it passes into the oscillator tube. The Radio Amateur's Hand Book Here, however, is an electric oscillator, which vibrates 300 million times a second, and emits ethereal waves a yard long. Scientific American Supplement, No. 717, September 28, 1889 You will see that you are now supplying the crystal with current from two sources, namely the distant source of the incoming signals and the local oscillator which you have formed. Letters of a Radio-Engineer to His Son His transmitter consisted of a single metal 6L6 crystal oscillator with an input of about 7 watts. The Dawn of Amateur Radio in the U.K. and Greece: a personal view It was an "oscillator", a new system for the employment of sound for submarine signalling, using water instead of air as a medium to transmit sound waves. The Romance of Elaine Sequel to "Exploits of Elaine" The size you require for this set has an output of 160 milliamperes and it will supply current for one to four 5 watt oscillator tubes. The Radio Amateur's Hand Book When we depress the key we start the oscillator going. Letters of a Radio-Engineer to His Son Then I would get the local oscillator going. Letters of a Radio-Engineer to His Son The transmitter was of French manufacture and consisted of two enormous triodes in a Hartley oscillator circuit. The Dawn of Amateur Radio in the U.K. and Greece: a personal view Of course, energy is being sent out only while the key is depressed and the oscillator going. Letters of a Radio-Engineer to His Son It will be observed that a storage battery is not needed as the secondary coil of the transformer supplies the current to heat the filament of the oscillator. The Radio Amateur's Hand Book You will always want a very weak coupling between the oscillator circuit and the detector circuit. Letters of a Radio-Engineer to His Son If it is, you will hear an intermittent musical note for some tune of your local oscillator. Letters of a Radio-Engineer to His Son In the final amplifier stage Harry used a Telefunken pentode, the famous and very efficient RL12P35 which was used in the German tank transmitters in all stages, oscillator, P.A. and audio amplifier/suppressor grid modulator. The Dawn of Amateur Radio in the U.K. and Greece: a personal view When you have completed this experiment in heterodyne receiving, using a local oscillator, you are ready to try the regenerative circuit. Letters of a Radio-Engineer to His Son It looks exactly like the 5 watt oscillator tube which is pictured at E in Fig. The Radio Amateur's Hand Book And now we can see how to make an audion produce an alternating current or as we sometimes say “make an audion oscillator.” Letters of a Radio-Engineer to His Son For each new setting very slowly swing the condenser plates in the oscillator circuit and see if you get a signal. Letters of a Radio-Engineer to His Son The electron coupled oscillator could not have put more than 4 or 5 watts into the antenna. The Dawn of Amateur Radio in the U.K. and Greece: a personal view Now we have several methods of varying capacity and inductance and therefore we are ready to vary the frequency of our audion oscillator; that is, “tune” it, as we say. Letters of a Radio-Engineer to His Son In this way the modulator tube acts like a variable resistance but it amplifies the variations impressed on the oscillations set up by the oscillator tube. The Radio Amateur's Hand Book Now take away this coil ab with its battery and substitute the oscillator of Fig. Letters of a Radio-Engineer to His Son In that case you have only to tune your antenna to 275 meters and then you will pick up a note when your local oscillator is in tune. Letters of a Radio-Engineer to His Son My first transmitter was just an electron coupled oscillator using a type 59 output pentode from a radio. The Dawn of Amateur Radio in the U.K. and Greece: a personal view Then the moment we start the oscillator we have the same effect in both circuits. Letters of a Radio-Engineer to His Son Connecting Up the Apparatus.—Where a single oscillator tube is used the parts are connected as shown in Fig. The Radio Amateur's Hand Book This circuit also is tuned to the frequency which the distant oscillator is producing and so in it we have the maximum oscillation of the electrons. Letters of a Radio-Engineer to His Son First there was a vacuum tube oscillator which generated a small current of the desired frequency. Letters of a Radio-Engineer to His Son A photo copy appears below: To return to pre-World War II operating: Most operators used crystal oscillators in order to have a clean '9x' note. The Dawn of Amateur Radio in the U.K. and Greece: a personal view This increased e. m. f., of course, results in an increased amplitude for the alternating current which the oscillator is supplying to the transmitting antenna. Letters of a Radio-Engineer to His Son Finally, where four or five oscillator tubes are connected in parallel proportionately greater distances can be covered. The Radio Amateur's Hand Book In the last letter I told you what determines the frequency of oscillation of an audion oscillator. Letters of a Radio-Engineer to His Son The output of these oscillators is supplied to the antenna. Letters of a Radio-Engineer to His Son That is, it has too little impedance to act like LA and so it permits the modulator to vary the output of the oscillator. Letters of a Radio-Engineer to His Son The system of intermediate-frequency amplification solves the difficulty and we shall see how it does so. 245At the receiving station a local oscillator is used. Letters of a Radio-Engineer to His Son This device is used to control the variations of the oscillating currents that are set up by the oscillator tube. The Radio Amateur's Hand Book The Microphone Transmitter.—The microphone transmitter that is used to vary, or modulate, the sustained oscillations set up by the oscillator tube and circuits is shown in Fig. The Radio Amateur's Hand Book Dear Sir: In the last letter I didn’t stop to draw you a picture of the action of the audion oscillator which I described. Letters of a Radio-Engineer to His Son A graphic representation of the oscillating currents set up by the incoming waves, those produced by the heterodyne oscillator and the beats they form is shown in Fig. The Radio Amateur's Hand Book You can, however, use 110 volt direct current from a lighting circuit as your initial source of power to energize the plate of the vacuum tube oscillator of your experimental transmitter. The Radio Amateur's Hand Book Where two or more oscillator tubes are used only one storage battery is needed, but each filament must have its own rheostat. The Radio Amateur's Hand Book Also called an oscillator tube and a power tube. The Radio Amateur's Hand Book Before I do so, however, I want to call your attention to the other way in which we can change the frequency of an audion oscillator. Letters of a Radio-Engineer to His Son Microphone.—A small transformer for modulating the oscillations set up by an arc or a vacuum tube oscillator. The Radio Amateur's Hand Book Where an oscillator tube is included in the circuits as shown at A and B in Fig. The Radio Amateur's Hand Book The Motor-Generator.—Where you use one 50 watt oscillator tube you will need a motor-generator that develops a plate potential of 1000 volts and has an output of 200 watts. The Radio Amateur's Hand Book MODULATION, GRID.—The scheme of modulating an oscillator tube by connecting the secondary of a transformer, the primary of which is connected with a battery and a microphone transmitter, in the grid lead. The Radio Amateur's Hand Book We have, therefore, the other rule for increasing the frequency of an audion oscillator, that is, decrease the capacity. Letters of a Radio-Engineer to His Son In wireless it is used for changing commercial direct current into direct current of higher voltages for energizing the plate of a vacuum tube oscillator. The Radio Amateur's Hand Book Power.—A transformer for stepping down a commercial alternating current for lighting and heating the filament and for stepping up the commercial a.c., for charging the plate of a vacuum tube oscillator. The Radio Amateur's Hand Book Further, a single 50 watt oscillator tube will send to distances of 50 to 100 miles while two of these tubes in parallel will send from 100 to 200 miles. The Radio Amateur's Hand Book |
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