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Why Resonant Frequencies Matter to Your Audio Setup - CE Pro Magazine Article from CE Pro
You hear resonant frequencies every hour of every day of your life. You may not know it, but you hear them. A resonant frequency is the tone given off when an object resonates -- simple enough. Add more water, the tone gets lower. For integrators, understanding resonant frequencies can help clarify why one set of speakers sounds better than another. Every object in the world has a resonant frequency. A lightweight object will generally have a higher resonant frequency than a heavy object. The density of the object also enters into the equation. The answer, of course, is that they weigh the same. The density of the two materials, however, is substantially different. Speaker manufacturers care about resonant frequencies, as those frequencies can color the sound of the speaker they are trying to build. If a note is played through a speaker, and that note is at the resonant frequency of the speaker, the speaker cabinet will radiate that sound.
Envy is a stronger motivator than admiration
Admiration is happy self-surrender; envy is unhappy self-assertion. Søren Kierkegaard Mind Hacks, Not Exactly Rocket Science, The Frontal Cortex ... there are so many successful blogs out there for the Digest to admire. Or envy. In fact envy might be better. Although considered a sin, envy rather than admiration, drives us toward self-improvement. For a preliminary study, 17 undergrads were asked to describe someone they knew who was better at something than they were. It was a similar story when 82 participants were asked to recall a time they'd felt either benign envy, malicious envy or admiration (there was also a control group who didn't do the recall task). For a third study, a further 96 participants read about a fellow student called Hans de Groot, who'd just won a prize for his excellent scholarship. Having established the contrasting effects of admiration and envy, the researchers turned to the circumstances that tend to elicit one emotion more than the other.
The Pink Floyd Collectors
Quartz Crystals
The following comes from Electron Tubes by John Morecroft, 1933 starting page 334... Fixing Frequency by Piezo-electric Crystal There are certain crystals, notably quartz and Rochelle salts, which show the phenomenon of piezo-electricity, or development of electric charge as a result of pressure. This peculiar action makes it possible to control the frequency of oscillation of a triode by the mechanical vibration of a piece of quartz. The application of the quartz resonators for fixing the frequency of oscillation of a station has been developed mostly by W. In Fig. 12-20 (to be drawn and included) is shown a common arrangement for a standard frequency oscillator. *2 A small disc of quartz, perhaps as big as a dime, is loosely held between two metal plates A and B, forming a minute grid condenser. Characteristics of Piezoelectric Quartz A normal quartz crystal is somewhat hexagonal in form, more or less pointed at one end. Mounting of Oscillating Plates Temperature Effects in Quartz
Can't feel the rhythm? You may be 'beat-deaf'
By Cari Nierenberg Mathieu takes dorky dancing to a whole new level. Not only does the Canadian graduate student not get into the groove, he can't even clap in time to the music. Beat-deafness is when your arms, legs and body can't move in sync to music -- and you can't tell if another dancer isn't in the groove, either. Scientists recently wrote up Mathieu's musical misfortunes in a paper considered the first documented case of beat-deafness. The researchers believe that beat-deafness is a newly-discovered form of congenital amusia -- the most well-known form of this condition is tone-deafness. This research, to be published in an upcoming issue of the journal Neuropsychologia, recruited volunteers who felt they can't keep a musical beat. In one experiment, the researchers looked at how well 34 adults, including Mathieu, could bounce up and down to a Merengue beat, and they compared these results to keeping tempo with a metronome, a ticking device that marks musical time.
Marijuana Legalization
American pot smokers have been punished with everything from life in prison to having one's "mellow harshed." Like their early 20th Century teetotaling counterparts, marijuana prohibitionists appeal to public health and safety. Both Sides of the Issue (According to the Internet) 1. 2. 3. 4. 5. Creating new industries by Gh0st Bolstering existing industries by badephemeris by Necbromancer Bolstering industries that the government pretends don't exist by TheIconoclast Making certain tourist industries way more appealing by mcsuperawesome And even making the space race interesting again by ponposessed Forcing youths to find creative outlets besides hiding places for weed by Navigator2001Plus and MadPiper6
Interval Training Music
The right kind of music can improve your performance in Interval Training. Check out my post on HIIT for different ways to do interval training. If you’re interested in learning about how to increase your performance through music, read the next part. Otherwise, you can skip to the end where I have included some of my favorite Interval Training Music. In a 2009 study, twelve (12) students were chosen for an experiment. There were 3 trials in total: First Trial: The songs were at their normal speed Second Trial: The songs tempo was lowered by ten percent (-10%) during the second trial. When the tempo was decreased by 10%, performance decreased by 36% AND the students did not find the trial to be easier. The music played a significant role on the performance. To read the details of this study, go to: There was another study that showed how basketball players performed poorly under high amounts of pressure. Pendulum I put Thunderstruck down below.
The mathematics of being nice - life - 21 March 2011
Read full article Continue reading page |1|2 Using mathematics to tackle some of biology's biggest questions, Martin Nowak has concluded that an ability to cooperate is the secret of humanity's success. He talks to Michael Marshall about drawing fire from Richard Dawkins, the perils of punishment, and devising the mathematical equivalent of the rules of religion Why are you so fascinated by our ability to help each other out?Cooperation is interesting because it essentially means that you help someone else, someone who is a potential competitor. You say there are five different ways in which we cooperate that give us an edge, in terms of natural selection. The third mechanism is when neighbours help each other - cooperators survive in clusters. Group selection has had a tricky reputation, and has been attacked by evolutionary biologists. Unless I've lost count, there should be one mechanism left.The last one is kin selection, which can occur when you help a close relative. Can you explain?
aM laboratory
