White particles in water?

Ok, this is now driving me crazy. When I pour a glass (empty glass, no ice yet) of water (filtered, old filter) the water is clear. Pour over ice and big puffy white flakes appear. At first, I think that there must be crap in my ice. So I buy a silicone ice cube tray and use filtered water to make ice cubes. Second iteration: filtered water over filtered ice. Results: BIG FLUFFY WHITE FLAKES. So, that didn't work. My next thought was that maybe I messed up with the ice cubes. So, I switched to distilled water for the ice cubes. Third iteration: filtered water over distilled water ice cubes. Results: BIG FLUFFY WHITE FLAKES. Again I found myself with nasty debris floating in my water. What's next? Oh, maybe it's the detergent I used to wash my glasses. So, I wash a glass by hand with Dawn soap. Fourth iteration: filtered water over distilled water ice cubes. Results: you guessed it... BIG FLUFFY ****** WHITE FLAKES. Gotta say, it makes me want to pull out my hair! I just don't get it. So, here's my question: what's causing the white flakes? I read somewhere that cold temperatures can cause certain salts (not table salt) to precipitate out of solution. This can also be the case with Magnesium and Manganese. Does anyone else have a solution? I just want to drink some nice clear water. I thought for sure a Brita filter would do it for me.

Question by kakashibatosi 4 years ago  |  last reply 1 year ago


Higgs Boson particle found!

Well, there's not much to do other than to say it: As I am sure many of you already know, the elusive Higgs-Boson particle, or "God-Particle" has been found by scientists at CERN, the friendly people who brought you the internet. This discovery has been ranked as 5-Sigma, which means that they are very sure of their results. I'm not a particle physics professor, so here's a video of one explaining this. History being made! Yay!

Topic by ilpug 6 years ago  |  last reply 6 years ago


Homemade MINI Particle Accelerator? Answered

Hello!  I'm working on a homemade mini particle accelerator from stuff in like hardware stores and thrift stores. I was wondering if someone could give me a definition of a particle accelerator and their hazzards? Also the only thing that I would need to buy off eBay is a some sort of detector for electrons. Heres a list of supplies: concrete, CRT Monitor, wood, lots of thin copper wire (for the electromagnets), a electron detector, and a power supply. It would be a circular accelerator too. Any ideas or info is welcome! PM me or just comment below!

Question by joespicnictables 8 years ago  |  last reply 6 years ago


Creating copper nano particles

Be it conductive ink, decorations or just a special pigment for your paint project, Copper is nice.Only problem is grinding this soft metal fine enough to be of any good use.A not so well documented feature of food additives is that they often have "unwanted" side effects.In our case E300, Ascorbic Acid or just Vitamin C.So how to make copper nano particles with it you might wonder?Prepare a well saturated solution of Copper Sulphate, you find the blue crystals in the gardening section together with fertilisers.It is best to use destilled water and not plain tap water, if in doubt go at least with the demineralised stuff for batteries.Adding E300 either dissolved in water or directly as crystals will start a nice reaction.The copper solphate is reduced back to metallic copper.There are a few problems though...For best results you need a saturation copper sulphate solution, low temperatures and a magnetic stirrer.This produced the finest particles for me at around 5°C.But even warm or at room temp the constant sirring is beneficial for even particle sizes.The ascorbic acid is used up in the process as well.You can start with a little and see how much you end up with in terms of a layer of copper particles at the bottom.Adding more E300 will cause a "rain" of fine copper particles - once this no longer happens you know the copper sulphate is used up as well.A dark greenish color of the solution will indicate this as well.Getting the copper out of the glass...Keep in mind the copper is extreme fine!As long as it stays in the solution it won't oxidize or otherwise react.Once out and in contact with just water and air oxidation happens quickly, after all it is pure copper...I found removing the watery solution and then adding destilled water to repeat the process is a good start.The waste from the first round can still be usefull though...In the final round I try to remove as much water as I can and then add methyled spirit to prevent the reactions.You can use oil as well or do a quick vacuum drying and store it in a sealed and oxygen free container.What to do with it?As a condictive paint with the right binder it only needs some rubbing with a smooth tool to create a conductive cover with a low resistance.In a clear paint or resin it provides some stunning color effects.You can even dust the dry powder onto a freshly painted surface to get a copper look.Leave without a top coat and you quickly get an old copper or even green look.If you ever wanted extreme fine metal particles you will come up with more ideas...Like shielding or sintering....

Topic by Downunder35m 6 days ago  |  last reply 5 days ago


LHC fired up this morning

At 7:00 GMT this morning, engineers fired the first beam at the Large Hadron Collider.It worked on the first try.We're not dead.They didn't discover extra subatomic particles previously unknown to scienceyet.Pretty boring, really.Actually, apparently they had technical difficulties the night before-part of the cooling system (which keeps the magnets cool. Very cool. 1.9 degrees kelvin, to be exact.) failed. They worked on it and managed to fix it overnight though.Details via newscientist (includes video).Via guardian.co.uk

Topic by Lithium Rain 10 years ago  |  last reply 10 years ago


What substance should I use for this?

I need to figure out what to use for a certain application.  It needs to have small particles, say the size of large glitter flakes, sand, styrofoam balls, or those tiny glass beads without holes that people glue onto ornaments. I'd prefer if it could pile up a bit like damp sand... not too high, 1/2 inch max is all I need.  I need it to not rot or deteriorate in a closed container for an extended period of time, and I need it to not attract a charge over time and cling to the sides of the container (like glitter and styrofoam balls do). I need to be able to push it around easily if, for example, I dragged my finger through a pan of it. I need it to be white or clear.

Question by supersoftdrink 8 years ago  |  last reply 8 years ago


A strange new beast in the particle bestiary?

  Interesting article from the BBC website :- A particle accelerator in the US has shown compelling hints of a never-before-seen particle, researchers say.  The find must be more fully confirmed, but researchers at the Tevatron are racing to work through existing data.  If proved, it will be a completely new, unanticipated particle; researchers say it cannot be the much sought-after Higgs boson.  It could also signal a new fundamental force of nature, and the most radical change in physics for decades. The full article is HERE.

Topic by AndyGadget 8 years ago  |  last reply 7 years ago


Build your own demo of a particle accelerator!

This was originally posted by an I'bles user in the "Feedback" forum. I've suggested he repost his questions under Science, and hope to answer them there. In the mean time, this video from the March 2008 issue of Symmetry Magazine (a joint SLAC/Fermilab publication) is really cute. The original article's video includes a bunch of related items which are worth checking out themselves. The high voltage (at least 50kV, I think) DC supply needs to be pretty stable -- you can't just throw a rectifier bridge onto a wall cord, but other than that, the project would be extremely simple to build. I've sent Dr. Johnson an e-mail to see if I can get more detailed specs. Update 4 Jan 2009: Todd Johnson and I have exchanged a couple of e-mails about this project (d**n, I love the collegiality of the scientific world!). For the DC power supply, he used a potted module (i.e., an enclosed unit with no accessible or dangerous components) designed for use in a negative ion generator (like the "Ionic Breeze"). He bought the unit surpus from http://www.goldmine-elec-products.com/prodinfo.asp?number=G9695 . The bowl you see in the video was custom made from acrylic. I thought something like a Pyrex mixing bowl would work, but the "corner" where the flat base joins the spherical body introduces a barrier to the ball doing what it should do. The coating on the ping-pong ball is something called http://www.goldmine-elec-products.com/prodinfo.asp?number=G16133 "wire glue"], touted as a substitute for solder. For this project, he covered the conductive paint with some clear Krylon for protection. Dr. Johnson and I are discussing the possibility of collaborating on an Instructable for this project. As a result of the video publicity, he's already gotten some inquiries on how to build it, so this would be an appropriate venue. He has a substantial amount of performance data and physics background on the device, which we will include in the ultimate publication.

Topic by kelseymh 10 years ago  |  last reply 4 years ago


Leon Lederman, Fermilab, Tevatron, particle accelerators and my school

Http://en.wikipedia.org/wiki/Leon_M._Lederman He is coming to my school in a week and all the students are allowed to go meet with him, and there is a special lunch organized for the students with him as well. Being the director of Fermilab which has the Tevatron which is the biggest particle accelerator in the world and is a physicist landmark. I am very excited about him coming and I wanted to know if you guys could help me think of questions because this may be a once in a lifetime thing for me!

Topic by astrozombies138 11 years ago


30 minute DIY AM particle-acceleration

Last fall, I verified an initial relationship of resonance between two bifilar wound wires (of any length). The predictable sequence resonates at the following levels - 20 Hz, 30 Hz, 50 Hz (and all multiples of these 3 frequencies). I used a Parallax Propeller Board - with PGEN 2.0 software from Innovationshop in Germany.   This software allows for a waveform built of 32 stacked frequencies to be created and amplified.   I have used it to successfully break the bonds of distilled water - as one of my earlier videos shows 2 years ago. JL Naudin calls it a "GEGENE machine" - but it is a simple, tabletop, particle accelerator.  His results can be found here:::  http://jnaudin.free.fr/wfcbooster/indexen.htm One of my earlier videos from May 2013 - can be found at YouTube - I just want to show people how this works.  It is a 4 minute explanation of open-sourced Patent 512,340.:::   https://www.youtube.com/watch?v=HHxK1VWrXcM The materials:: 1 - 1800 watt induction cooktop (iron, copper, or 3-ply stainless cookware is required on these types of devices) 2.  50 feet of 14 AWG speaker wire 3.  2-10 count of 500-watt halogen lightbulbs. 4.  wire, solder & connectors for the wire-ends. 5.  1 stainless-steel HHO DC electrolyzer tank.  6.  Cooking Pan - or light fixture (to hold light bulbs). 7.  High Voltage diodes (500 Volts or higher)

Topic by jabel4 4 years ago  |  last reply 4 years ago


Particle physics question for Kelsey or anyone else that can answer....

I am finishing up the book I am reading on Dark matter, and Mr. Krauss mentions "spontaneous symmetry breaking" (not a hard concept) creating or producing  spin-0 particles or scaler particles  (Higgs Boson?).   My question is, have any of these particles, as yet, been observed?  The book I am reading is slighty dated, and so I am not even sure it is up to date on the vacuum energy  postion towards dark matter and a flat universe.

Topic by Goodhart 7 years ago  |  last reply 7 years ago


Sawing MotherBoard PCB's- Inhaling Dangerous Dust Particles? Answered

I have recently salvage a couple MotherBoard PCB's, And I was wondering if I cut them (saw them with a hacksaw) Will they give off a lot of dangerous dust? I've heard people talk about the fact that it's dangerous, So I was wondering it it really is. If it is, I thing I'll score the PCB's with a utility knife, Or just throw them away

Question by Yonatan24 3 years ago  |  last reply 3 years ago


Universe in a box

I want these so badly it isn't even funny.From particle zoo: "The UNIVERSE-IN-A-BOX contains all the particles from the Standard Model plus four theoreticals and two nucleons, for a total of 22 particles, covering most of the known universe."The site also sells large versions of all of these. :O Want. I know what my next sewing project is...well...I guess actually my second or third next one... ;)Link

Topic by Lithium Rain 9 years ago  |  last reply 9 years ago


More on the LHC Countdown

The Large Hadron Collider is indeed large: the underground particle accelerator is about 17 miles in circumference (it is circular). Located between France and Switzerland, the LHC is now almost ready to begin full-length particle accelerations. Researchers are attempting to collide protons together that are accelerate to 7 TeV (tera electron volts).Following Tetranitrate's first post, LHC Countdown, people have been looking for more information.Even More on the LHC from Kiteman, with more explanation.Here is a great set of pictures from Boston.com, showcasing all stages of production of the LHC.For a better visual understanding of how it works, take a look at this LHC animation from the official LHC web site.More general information from the LHC web site.As I like to say, this is large and in charge.

Topic by joshf 10 years ago  |  last reply 10 years ago


Has anyone made a home spray dryer to make particles?

Has onyone tried to make a spray dryer (see below)?  I am interested in making microparticles and this is potentially a method, but they run about $30K . http://www.buchi.com/Mini_Spray_Dryer_B-290.179.0.html Thanks.

Topic by bmvogel95 7 years ago  |  last reply 6 years ago


What's the best way to sand and spray paint particle board?

Hi All, Trying to make replacement bases for my floor-standing speakers.  The originals were made out of particle board and appear to have a black spray-paint finish.  They were destroyed in the post when the person sending me the speakers failed to package them properly.  I now have the particle board cut to the right shape and I have begun the process of sanding.  It is my intention to spray a primer on, sand, spray a top coat, and then spray some sort of finish.  so here are my questions: (1) I have sanded the board down with successively finer sandpaper and finished with 1500 grit wet and dry.  This is a very smooth finish until you wipe away the dust at which point it becomes rough-ish again.  Having done a bit of research I am now concerned that I have sanded the board down a bit to much, some forums suggest taking the board down only as far as 250 grit before spraying on the primer.  What should be my finishing grit before spraying on the primer?  My assumption was the finer the better but I'm not too sure now.  If the finish should be fine then how do I remove those stubborn fibers? (2) what type of spray primer works best with particle board?  There seems to be a multitude but most of the information related to car/auto body work.   (3) what grit of paper should I use on the primer? (4) what should I use as a top coat? Much thanks in advance Ross

Question by rcgraham 5 years ago  |  last reply 5 years ago



Higgs boson? Answered

Does science understand how the Higgs Boson gives other sub atomic particles mass? or is that the next question

Question by rickharris 6 years ago  |  last reply 6 years ago


how do you keep you aquarium clear from colloidal particles?

Question by garfustarsius 10 years ago  |  last reply 10 years ago


Iron Man's Repulsors

How would you build iron mans repulsors? I have some already...     You could use a transducer for particle displacement, you might be able to send an ion beam through a "tunnel" of a heavier particle, since it can't travel fast in air. I need ideas! Thanks, Laserbeamtoast.

Topic by Laserbeamtoast 5 years ago  |  last reply 5 months ago


Two "hot topics" from particle physics -- read the actual papers!

I've noticed that two recent particle physics "discoveries" (what I'd call analysis results) are beginning to get some media coverage, at least in the science press. Below, I provide links to the actual papers (the preprints in arXiv), and a bit of my own opinion. I encourage the curious to read, or at least skim, the papers --- there will probably be a lot you don't understand (these are technical research papers, after all!), so don't hesitate to ask questions.Dark matter "observation" by PAMELA satellite -- excess of high energy positrons in cosmic rayshttp://arxiv.org/abs/0810.4995The PAMELA data are high-statistics, and they've done an excellent job with their systematics anddetector calibration. Their low energy data are entirely consistent with previous results, which makes the excess and plateau seen above 10 GeV rather compelling. I don't think we know enough about conventional astrophysical sources of positrons to have any confidence ascribing this result to "new physics.""Ghost particles" in Fermilab p-antip collisions -- excess of high impact parameters muonshttp://arxiv.org/abs/0810.5357Charged particles (like muons) are identified in big detectors such as CDF (and BaBar) by picking up signals from their occasional interactions with low density material, and fitting a trajectory in space to those "hits." You can't put active detector material all the way down to where the beams collide, so an extrapolation from the detector region to the "interaction point" is required. There can be many complicated and non-obvious systematic uncertainties affecting those fits. The fact that only about 1/3 of CDF was willing to sign this paper suggests to me that the systematics in this analysis are not really under control yet, and any interpretation of the result should be taken with a grain of salt.

Topic by kelseymh 10 years ago  |  last reply 10 years ago


How do i separate gold from sulphides without using chemicals or dieing from sulpheric acid? Answered

My freind has a large supply of microscopic gold particles, however they need to be separated from sulphides. there is a high concentration of gold in this solution, and millions of dollars could be made. however, heating the sulphides will make sulpheric acid, which burns away your lungs (also used in chemical warfare). chemicals currently used for the process of separating sulphides from gold are very toxic, and also expensive. the chemical process is very inefficient too. i am looking for a way to separate sulphides from gold without using (toxic, dangerous, expensive, rare) chemicals.

Question by biolethal 9 years ago  |  last reply 1 year ago


How to measure the displacement of a gravel particle by arduino kit ans extensometer sensor? Answered

I want to measure the displacement of a particle of gravel in the surface of an slope, along the year (each hour ot forur hours or something like that), in order to study the erosion evolution of the terrain. I suposse that the use of an arduino kit (with sd or micro sd datalogger among other characteristics) and some extesometer sensor could be the better option, but i don´t know how to do it... Thanks!

Question by madepablo 9 years ago  |  last reply 9 years ago


how could attached cooling fan, heat sink,particle bottle ring and reaction chamber in arc reactor?

Ok. First off lets take a look at the blueprints for the arc reactor that is supposedly "Stark Tech" (link below) http://th09.deviantart.net/fs71/PRE/i/2012/083/c/6/arc_reactor_blueprints_by_fongsaunder-d4tttee.jpg  how could attached cooling fan, heat sink,particle bottle ring and reaction chamber? i am confuse please help me.

Question by gopalpotdar 3 years ago  |  last reply 3 years ago


preventing buildup of glutinous substance on duct walls?

During a manufacturing process, hot air flows through a duct carrying fine particles of a glutinous substance. With time, those particles stick to the walls of the duct and create a thick layer on them. This layer reduces the cross-section area of the duct, changing the velocity of the flow. To remove this layer, the flow has to be stopped. Any ideas of how to remove the layer without having to stop the flow? Or to prevent the buildup of the layer?

Question by khalednasr 5 years ago



Contest entry rejected, why?

I entered the Playwood contest with a little playwood Icosahedron but the entry was rejected. Tried an Email to the support but from the forum replies it seems good to ask here too why it was reected... The contest states made from plywood, I used plywood and wood glue. Other entries don't even use any playwood, instead particle board or even MDF. Can someone please explain why particle board and MDF is fine while using plywood gives a rejection? I'm not desperate for the contest just totally fail to understand the reason for the reject ;)

Topic by Downunder35m 3 years ago  |  last reply 3 years ago


If I wanted to build a small linear accelerator what how would I make the electrostatic generator? Answered

I am going to build a small linear accelerator like the one rutherford used to bounce alpha particles off of a sheet of gold foil. Actually that is exactly what I am going to make. The only thing is that I am not sure how I would generate the electrostatic field. Would a van de graaff generator work, or would I need something different? if I do need something different how would I make it?

Question by Higgs Boson 7 years ago  |  last reply 6 years ago


transfer a real world object throught wires, possible? Answered

Scan the real world object and get details about it. reproduce it at the other end with high energy photons or some particle generator.

Question by bobbygoks 9 years ago  |  last reply 9 years ago


String Theory,..this is not detailed, but what do you think?

Here is a short video (not embeddable, sorry) on the Higgs-Boson and string theory by Dr. Michio Kaku.  Comments?

Topic by Goodhart 7 years ago  |  last reply 7 years ago


Copenhagen or Many Worlds Interpretation?

Which interpretation of quantum physics do you prefer? Personally I favour the Many Worlds interpretation as it better explains how the particle 'chooses' what state it collapses into, whereas when I consider the Copenhagen interpretation, it makes me think that the particle is deciding, which bothers me, obviously. However, the Many Worlds interpretation throws up many issues, such as the problem of probability (if a universe is created for every possible outcome, the probability of anything is 1, including say, your computer randomly exploding now). Which is quite ridiculous. But still, to me, a better explanation. So your thoughts?

Topic by Rupert95 8 years ago  |  last reply 8 years ago


Neutron polarizer instructions? Answered

I need some kind of instructions for a Neutron polarizer or a quadrupole magnet. I need some divece to turn ions or alpha particles into electricty directly. If anyone finds something let me know please.

Question by Tobor 2.0 8 years ago  |  last reply 8 years ago


What is the definition of "matter" according to the string theory? Answered

Hello!  I have recently studied about the string theory. Now what I have understood about it so far is that very small particles like the one's that make up neutrons and protons are actually made up of "strings" that vibrate in 10 dimensions at particular frequencies which determine the nature of the particles that they form. I also came to know that "strings" themselves are weird distortions of space-time.   Now I don't know if all that information is correct or not. So my question is that according to it, it would mean that matter itself is a distortion of space-time, is this true?

Question by Wisaam 6 years ago  |  last reply 6 years ago


How Do you Get dust out of an iPod Touch 4th Generation Screen?

Ive had it in my pocket. (duh.) and there is a lot of little particles that looks to be getting in through the Home button.

Question by unominame 7 years ago  |  last reply 7 years ago


The Higgs Boson ?

If you hang out in some of the nerdier websites (including this one), you probably couldn't help but get excited about yesterday's news regarding the Higgs Boson. If you somehow missed it, here's the breakdown.... Higgs Boson

Topic by Goodhart 7 years ago  |  last reply 7 years ago


Inexpensive way to grind plastic bottles?

Greetings, I am looking for an inexpensive way to grind individual plastic bottles into particles for easy melting in molds. I tried a blender. It just scrapes it very loudly and burns it. It doesn't break it up. Thanks

Topic by NeuroPulse 10 years ago  |  last reply 1 year ago


Does the point at which two light beams coincide appear to be more visible/greater intensity than the beams themselves? Answered

Specifically, i'm interested to know if the coincident point of two laser beams would appear to have a greater brightness / intensity than the beams themselves. For example, I think I read somewhere that 15-25mW green laser diodes have a visible beam in med-low light conditions because they offset dust particles? So does this mean that where there are two light sources approaching from different angles that there will appear to be a greater amount of reflection from the dust particles? Any information would be useful really, just to put my mind at ease... Thanks :)

Question by DELETED_Alexdlp 7 years ago  |  last reply 7 years ago


Step by step on building a Berlin Grand Reception desk?

I need Help on how to build a berlin grand style reception desk?  want the rounded look but a much cheaper build.... with particle board or plywood. i just need a design to get that round look?

Question by ur_sunshine4 7 years ago  |  last reply 7 years ago


Physics puzzle games- Auditorium, World of Goo and Crayon Physics

I really like puzzle games. I've played two that are really addictive and beautifully made, and found another that looks great.AuditoriumAuditorium has a free on line demo. I've played through the levels a few times. The full game hasn't been published yet.The screen has a stream of light particles flowing into it. You have one, or more, buttons that will affect the path of the particles: like one that bends the light stream to the right, or one that pulls it into a vortex. You move the buttons around to steer the stream into boxes that are scattered around the screen. There are many particles in the stream, and by careful placement of the buttons, you can split them into different paths. When you hit the boxes with light particles a new group of instruments join a symphony you hear. The goal is to get all of the instruments playing.Some levels have areas that will change the color of the light particles as they pass. Some of the music boxes are different colors, and you will have to route the light particles through the color changer before you send them it into the box. Try it out, the free online demo will make it very clear. I didn't even look at the directions. It's easy to find your way as you go. I love a game like that.PlayAuditorium.comWorld of GooIn World of Goo, you have to stick living gooey balls together to make lattice and build some kind of structure (tower, bridge, rope, ...) that allows the gooey balls to reach the end of a pipe that sucks them up. The Gooey structures are not stiff. If you don't build your structure carefully it will bend and can collapse under its own weight. It is a 2D game with a comic book style to the graphics. There is also a level designer and an online community where you can share new levels. I haven't experimented with these yet - I'm still working through the levels that came with the game.There is a downloadable demo for both PC and Mac. There is also a WII version for sale.It is drawn and designed beautifully. Totally addictive.2dboy.comCrayon PhysicsI haven't played this yet but it looks really great.The graphics look like they were drawn by a 5 year old with a box of crayons. When you get to a level, it presents a drawn scene with a star and a ball (it's actually an apple. Must be a tribute to Newton) somewhere in it. You have to draw some kind of mechanism, or ramp, or some objects, or... As you are drawing, the objects develop mass.Everything you draw then reacts with gravity. You have to harness the momentum you get from everything dropping to the ground in order to push, throw, drop or guide the ball so it hits the star.Look at the video it is self explanatory. CrayonPhysics.com

Topic by SFHandyman 10 years ago  |  last reply 10 years ago


LHC Countdown

They have started the final countdown for the LHC.Some say that it will find the God particle.Others say that it will kill us all.I say hope for the best, but [http://instructables.com/community/Its-the-End-of-the-World-As-We-Know-It-.../ prepare for the worst.]For more information, look at these newer posts:More on the LHC Countdownand End of World One Step Closer. Or Not.

Topic by Tetranitrate 10 years ago  |  last reply 10 years ago


Look out, Switzerland!

Tomorrow*, the Kite family are going to the land of cuckoo clocks, cartoon cheese and particle accelerators. We're visiting friends in Geneva, but if you're out there and the environs, and see a chap in a leather fedora and Robot shirt, or wearing a Robot lapel badge, stop and say hello. I'll give you stickers. (*Wednesday 6th - Wednesday 13th)

Topic by Kiteman 4 years ago  |  last reply 4 years ago


LED disk monitor

I'm thinking of making an LED based hard drive monitor that will show the % of free space. My thoughts are either an Electric Imp or a Spark Particle wifi controller and then some kind of OSX script that runs  on my server to read the disk usage and push it to a web server. I'll be using APA102 or LPD8806 strips. Any thoughts or suggestions? Cheers.

Topic by filthyPhil 3 years ago  |  last reply 3 years ago


Accelerator in a bowl

I want to help my kid explain particle accelerator with this project; I think I get the conductive balland positive/negative strips. What do I use to get "high powered dc current"? any suggestions ?I would like this to be self contained i.e. not plugged in. Thankshttp://www.symmetrymagazine.org/breaking/2008/03/26/accelerator-in-a-bowl/

Topic by sabadin 10 years ago  |  last reply 10 years ago


Watch out everyone, the worlds ending. Sorry about that.

Scientists hit with 'end of the world' legal challenge over Big Bang experimentSep 1 2008THE biggest scientific experiment in history has been hit by a last-minute legal challenge - amid fears it could cause the end of the world.Opponents of the Large Hadron Collidor claim the machine may create a mini-black hole that could tear the earth apart.The £4.4billion machine, the most expensive experiment in history, is due to be switched on at the European Nuclear Research Centre - CERN - in Geneva, Switzerland, in nine days' time. Those behind the project hope it will unlock the secrets of how the universe began by replicating the conditions of the Big Bang.The machine will smash pieces of atoms together at high speed and generate temperatures of more than a trillion degrees Celsius. The collisions will create temperatures 100,000 times hotter than the centre of the sun in a space a billion times smaller than a speck of dust.But opponents fear the worst. An application for an emergency injunction was rejected on Friday and now the case will continue under human rights laws.German chemist and academic Professor Otto Rossler, one of the project's opponents, said: "CERN has admitted mini black holes could be created when the particles collide - but they don't consider this a risk. "My calculations have shown it is quite plausible these little black holes survive and will grow exponentially and eat the planet from the inside."We do not believe the scientists at CERN are taking all the precautions they should in order to protect human life." Professor Rossler claims in the worst-case scenario, the Earth could be "sucked inside out" within four years of a mini black hole forming. He argues the research violates the right to life under the European Convention of Human Rights. The legal challenge is against the 20 countries, including the UK, behind the project.Scientists involved in the project have dismissed concerns as "absurd". Particle colliders have been used by scientists for over 30 years without any noticeable harm to the planet. This latest machine, however, is the largest and most powerful ever constructed. Built 300ft beneath the French-Swiss border, it will fire particles round its 17-mile circumference 11,245 times per second before smashing them into each other.The machine will be activated on September 10, although it will be several weeks before the first particles are collided. Scientists hope that, among the debris thrown off by these collisions, they will find the elusive Higgs boson thought to be responsible for giving every other particle its mass, or weight.The CERN facility faces a second lawsuit due to be heard tomorrow, filed by environmentalists in Hawaii. But a safety report published this year gave the project the all-clear. It said nature produces higher collisions than the collider is capable of when cosmic rays hit the planet.CERN spokesman James Gillies said: "The case contains the same arguments we have seen before. "We are now concentrating on firing the first beams around the collider and then on fine tuning it until we can get collisions - when the science will start."Source: Daily Record OnlineWhat do you think about, A) this amazing use of particle acceleration and B) the technically plausible but remarkably unlikely end of the world scenario it might create?

Topic by lifelong-newbie 10 years ago  |  last reply 10 years ago


End of World One Step Closer. Or Not.

A vast physics experiment - the Large Hadron Collider (LHC) - reaches a key milestone this weekend ahead of an official start-up on 10 September.Engineers had previously brought a beam of protons - tiny, sub-atomic particles - to the "doorstep" of the LHC.On 9 August, protons will be piped through LHC magnets for the first time.The most powerful physics experiment ever built, the LHC will re-create the conditions present in the Universe just after the Big Bang.This last sentence is the one that's caused a little panic amongst certain groups of the population - they are convinced that the experiment will create miniature black holes which will fall through the LHC towards the centre of the Earth, where they will orbit around, gradually consuing the planet from beneath our feet.When the collider is commissioned, the beams will cross paths at allotted points along the tunnel, smashing into one another with cataclysmic force.My God, have these people never seen Ghostbusters??Scientists hope to see new particles in the debris of these collisions, revealing fundamental new insights into the nature of the cosmos and how it came into being. Now that is seriously cool (well, hot, actually) - to be able to recreate what the whole of reality looked like mere femtoseconds after it started...BBC storyCritics have previously raised concerns that the production of weird hypothetical particles called strangelets in the LHC could trigger the mass conversion of nuclei in ordinary atoms into more strange matter - transforming the Earth into a hot, dead lump.Earlier BBC storyAmusingly paranoid storyAnalog Magazine article

Topic by Kiteman 10 years ago  |  last reply 10 years ago


Hookah Question!!

Hey, I just smoked out of a hookah (wasnt the first time) but I think i inhaled an aluminum foil particle, (the foil sort of crumpled up into the tobacco...) I mean i felt a small piece go through my mouth and I inhaled it, now im not sure if it is stuck in my lungs and if it is what will happen to me?? this is scaring me a lot, if somone could help that would be amazing thanks -AV

Topic by vadim87 12 years ago  |  last reply 12 years ago


What are these "clinkers" that are left behind in the fireplace? Answered

"Clinkers" is the word my dad came up with for them, because they make a glassy "clink" when you drop them. They aren't like regular embers, they're much denser, and they look kind of like coprolites made of particle board. Can't tell you what kind of wood makes them, because we use various types and they show up unpredictably.

Question by CameronSS 9 years ago  |  last reply 9 years ago


Ionizing vs. non-ionizing radiation, units, and safety (updated)

Note: This was originally intended as a reply in the Americium-241 Science forum topicWhen people talk about "radiation," they are referring to many different things, and are probably thinking of some things that don't even apply. "Radiation," the invisible energy given off by radioactive materials, can be either "subatomic" particles or electromagnetic. The most common particles emitted are "beta rays," high-energy electrons, and "alpha particles," helium nuclei. Some sources can emit neutrons, protons, or "positive beta rays" (anti-electrons, or positrons), but those are much less common.The units we use to measure radioactivity are becquerels (Bq, decays per second) or curies (Ci, 3.7 x 1010 decays per second). Since the effects of radiation depend on their energy, another unit of interest is absorbed dose, the energy deposited per unit mass of target, measured in grays (Gy).Safety experts classify radiation into "ionizing," meaning there is enough energy to knock electrons out of atoms or molecules, and "non-ionizing." Infrared and ultraviolet light are non-ionizing, as are neutrons. Alpha particles (helium nuclei), beta particles (electrons) and gammas (as well as lower energy X-rays) are all ionizing radiation. The three have substantially different effects on biological systems, even at the same absorbed dose. Consequently, for radiation safety purposes, scaling factors are applied to produce numerical measures (sieverts, Sv) of "effective" or "equivalent" dose, that can be compared across different kinds of sources.Here's a small table with information for some commonly encountered sources. Isotope Source Activity Dose rate Am-241 smoke detector 35 kBq (1 µCi) 11 µSv/yr @ 1m Te-99m MRI contrast 740 MBq (20 mCi) 1.6 Sv/hr @ 1cm C-14 atmosphere, body 0.23 Bq 10 µSv/yr K-40 bananas, body 4.4 kBq 200 µSv/yrWhat you should see clearly from this is that the natural radioactivity in your body is comparable or larger than that in a common smoke detector. At SLAC, the limit for exposure to sources at the lab by most staff (including me) is 20 µSv/yr (5 mrem).As I noted above, neutrons are sometimes lumped in with ionizing radiation in non-technical "radiation safety" classes (we call them "the photon is your friend" training :-). That is not really accurate -- neutrons don't interact with electrons(*), and so cannot ionize directly. They can interact with hydrogen nuclei (protons), knocking them out of complex organic molecules, and leave behind ionized fragments and free radicals. The can also be absorbed by otherwise stable nuclei, making them radioactive; those new nuclei may in turn give off ionizing radiation.Neutrons lose energy much more slowly in passing through material, and so can penetrate much farther than ionizing particles or gammas. The nuclear interaction [http://en.wikipedia.org/wiki/Cross_section_(physics) cross-section] is much more important here than dE/dx (ionization) energy loss. Materials rich in carbon and hydrogen (for example, paraffin) are far more effective at neutron shielding than dense metals like lead.(* for the expert readers) Yes, there is n-e scattering through W and Z exchange, but the cross-section and energy scales are completely irrelevant to this discussion.

Topic by kelseymh 10 years ago  |  last reply 10 years ago


What would happen if you stopped a galaxies rotation?

I mean a total complete standstill, every dust particle and bit of matter stopped moving rotationally in relation to the galactic center. Would the gravitational effects drag everything to the center if it stopped rotating over a few million years or would everything fly off in a straight line if it stopped instantaneously and eventually fall back into the center? 

Question by The Ideanator 7 years ago  |  last reply 5 years ago


Sushi on a Stick, Glowing Fingers, Secret Poster Stash

Sushi on a Stick Glowing Fingers Secret Poster Stash Cigar Box Guitar 10-Minute Walker Bot Homemade Magic Shell Wireless Sensor Datalogger Geometric Wall Art LEGO Headphones iPhone Macro Lens Simple Rolly Bot Build a Log Cabin Macro Particle Accelerator DIY iPad Case BBQ Gas Conversion

Topic by randofo 8 years ago