Hans Rosling's 200 Countries, 200 Years, 4 Minutes - The Joy of Stats - BBC Four. Fabrics Get Smart - 2006-05-15 00:00:00 | Design News. Print your own flute. Sandrine Ceurstemont, video editor Cheap 3D printers can now quickly make plastic replicas of almost anything, from an insect's wings to copies of their own parts. But now Amit Zoran and his team from the MIT Media Lab have used one to recreate the intricate design of a flute (see video above). They started by making a digital model of the instrument based on a metal flute but with adaptations to account for the new materials used, and the level of precision possible, with 3D printing.
The model was then sent to a 3D printer which constructed the flute in four parts over a period of 15 hours. It squirts out three different plastic composites developed by Objet, the company that created the printer they used. When tested by a flautist, the plastic flute was given the thumbs up for sound. The goal, however, isn't to create a flute that's superior to a metal one: the challenge is to print a working flute that's acoustically and ergonomically similar. Canadian TV slams homeopathy | Bad Astronomy. PC Control of NexStar Telescopes - NexStar Resource Site. All of these scopes are connected to a PC or PDA via the RS-232 port on the bottom of the hand control (HC). For more information about the various ports and connectors on your scope, visit the Odds and Ends section of this web site.
The correct cable is described in the link "Hand Control RS-232 Port Cable" above. If your PC does not have a serial port (very common with today's laptop/notebook computers) you will also need either an RS-232 port PC Card ($40 to $100) or a USB to serial adapter ($30 to $40). Note that many people have problems with the USB adapters so the PC Card is a better solution if your laptop has a PC Card slot. PDAs (Palm Pilot, Pocket PC) require a serial "sync" cable or a serial port CF card which is used to connect to the Hand Control RS-232 Port Cable. Be sure to check out Larry McNish's diagram linked above. Most of the information you find here is the result of my work on NexStar Observer List, a PC control program for all models of NexStar scopes. Nederlandse Mycologische Vereniging - Welkom. Olefin Metathesis Polymerization. There are three sections to the metathesis page, so we're going to give you this handy index to help you navigate: What Is Olefin Metathesis?
Acyclic Diene Metathesis PolymerizationRing Opening Metathesis Polymerization What Is Olefin Metathesis? In these pages we've talked an awful lot about making polymers from monomers with carbon-carbon double bonds. Remember all our talk of vinyl polymers? But vinyl polymers don't have double bonds in the back bone chains. Now we're going to talk about taking monomers with double bonds, and using them to make polymers with double bonds in the backbone chain.
Olefin is an old word, kind of like betwixt or forsooth. Neato, huh? That's right folks, with olefin metathesis you always get So let's take a look at them why don't we? Metathesis Polymerization #1: Acyclic Diene Metathesis Polymerization The two different polymerizations are called ring opening metathesis polymerization, or ROMP, and acyclic diene metathesis polymerization, or ADMET.
Chemical Data Access Tool | OPPT | US EPA. BBC - Earth News - Curious crows use tools to explore dangerous objects. What happens when a New Caledonian crow meets a toy rubber spider? New Caledonian crows use tools to investigate unfamiliar and potentially dangerous objects, according to scientists. New research shows crows cautiously investigating new objects using sticks as an extension of their beaks. New Caledonian crows are known to fashion tools to access food sources such as wood-boring beetle larvae. Scientists suggest this study is the first time birds have been recorded using tools for multiple purposes.
The findings are published in the journal Animal Cognition. New Caledonian crows (Corvus moneduloides) are known for their intelligent and innovative use of "tools", such as twigs, to extract nutritious insects from hard to reach places. Studies have also revealed that the crows will craft tools into more suitable shapes and use more than one in order to reach food. The research team aimed to study how the crows reacted to objects that were not associated with food. Solar Stormwatch. Daily aspirin at low doses reduces cancer deaths, study finds -- but caution urged. A daily low dose of aspirin significantly reduces the number of deaths from a whole range of common cancers, an Oxford University study has found. The 20% drop in all cancer deaths seen in the study adds new evidence to the debate about whether otherwise healthy people in their 40s and 50s should consider taking a low dose of aspirin each day.
Aspirin is already known to be beneficial for those at high risk of heart disease. But among healthy people, the benefit in lower chances of heart problems only marginally outweighs the small risk of stomach bleeds. The large size of the effect now seen in preventing cancer deaths may begin to tip the balance in favour of taking aspirin, the scientists suggest, but say that it is a matter for the health bodies who write treatment guidelines. "These results do not mean that all adults should immediately start taking aspirin," cautions Professor Peter Rothwell of the Department of Clinical Neurology at Oxford University, who led the work. ABRO, de microscopenspecialist! Cosmic Rebirth Encoded in Background Radiation? The dark circles show regions of the universe that are cooler than average. Could each ring provide information about what happened before the Big Bang? (V.G.Gurzadyan and R.Penrose) They say that fact is often stranger than fiction, and it would appear that fact and a science fiction storyline have just collided in a big way.
Scientists analyzing the ubiquitous cosmic microwave background radiation (CMBR) observed throughout the Universe have claimed they’ve discovered a pattern in its signal. And having watched a recent episode of Stargate Universe (SGU) — an awesome sci-fi series, and one of my favorites — a storyline involving a pattern in the CMBR has just aired. Although the SGU CMBR pattern has a very different origin to what this most recent discovery is suggesting, it is a testament to how awesome accurate science fiction writing can be. SLIDE SHOW: Top 10 Space Stories of the Decade What is Cosmic Microwave Background Radiation? ANALYSIS: Mission Complete! A Pattern. Bonnie Bassler on how bacteria "talk".