Separate names with a comma.
Discussion in 'General Discussion Forum' started by Brother None, Sep 4, 2003.
Condensed matter physics, I like that.
Why thank you. I have always found things such as metamaterials fascinating, such things as being able to apply an electrical charge to a conductive surface THROUGH a nonconductor...., bending light in various frequencies or having EM emissions essentially disappear using split-ring resonators, getting trapped and dissipated, one presumes, as heat (which of course for something like a cloaking device, could be compensated for with additional cooling systems, such as compressed gas)
And I cannot help but wonder about phases of matter like quantum spin-glasses and liquids, where a magnetic ordering is essentially 'trapped' in a way it would not naturally be in. Keep thinking there might be the potential for a sort of magnetic capacitor in there somewhere, a component that could be charged in a strong external magnetic field, and allowed to return to its 'locked' space..I keep wondering, if that disorder was momentarily quenched, if one could use such a material to generate an electromagnetic pulse. Of course I doubt very much I need to elucidate to fallout fans, the sorts of things an EMP generator could be used fir
Yeah, condensed matter has some extremely interesting aspects to it. The actual work is way less glorious than what it sounds like on paper, but it's still pretty awesome
There are just so many, if you'll pardon my french, fucked-up-freakish effects that happen on the quantum scale of matter, and when such effects scale to micro-/meso-scales.
I've been wanting of late, to start experimenting a bit with graphene, and particularly, the spin-locked states of matter, the idea of a potential magnetic equivalent of a capacitor is just sticking in my mind and I want to pursue it. Not too high-energy to access in a home lab either. (I've been wanting to build some higher-energy stuff, cyclotron in particular, and calutron (oldschool ruski sector-based mass spectrometer, they used it for isotope separation, by deflecting an ion beam with a magnetic field to enrich a sample, in their case for nuclear weapons research, since isotopes of different weight would deflect to a different degree in a homogenous magnetic field) but its annoying as hell that there really isn't any way to get past a certain limit, being in a house, the energy levels that can be reached in an accelerator are limited by the energy levels which can be tapped from a home mains supply.
Not of course, that I am in the least interested in building a nuke, It'd be interesting to say, separate natural lithium-6 from lithium-7 (since 6Li-deuteride is used as fuel in fusion bombs, not that I would be likely to be able to build one, if I wanted to without a HUGE amount of effort and time, and to build the fission nuke to set it off)
Or almost-ideally, selenium isotopes, given that Se has several non-radioactive isotopes, one in the upper 40% range of natural Se, another just under one quarter percent and for a bit more of a challenge, two others that occur at under 10% each. Harmless from a radiological perspective), or else natural potassium , since a radioisotope, 40K makes up part of the natural K occuring terrestially, and being an alkali metal it has a relatively low melting and boiling point compared to the transition metals), and 40K could easily be identified via its radioactivity (beta- decay, electron capture and very rarely, positron emission), and given it isn't TOO volatile, and that the quantities worked with are in the tracer levels, far less dangerous than the REALLY damn sweet technetium sample that I've managed to find on the market, plated onto gold in a thin layer (its 99Tc, plated onto a gold strip to give a perfectly visible sample, in a sealed glass vial, about £400, but being rather uncommon on the market available to hobbyists to say the very least, that one, I've GOT to have whilst it's available and before someone else snaps it up, for the element collection). That one is again, safe enough, being although a powerful one, an alpha emitter, and its radiation is stopped dead by paper, never mind the borosilicate glass tube it comes in, under argon.)
(although excess Se absorption is toxic, although in such an experiment it isn't as if exposure would be likely, given the care one would need to take with energetic particle beams to begin with, and besides, I would imagine if (bar one unfortunate and downright unpleasant accident in my early childhood with the stuff, during a distillation of it) I'm alright handling white phosphorus, cyanides etc. then a little bit of selenium in the elemental state is not a great worry, sufficient to send off to someone with some suitable equipment for isotopic analyses [hobbyist scientists tend to coprecipitate, so to speak]
And in particular, another project that has intrigued me, is a SASER (think of it as the phonon-based analog of a laser, the result being a collimated beam of sound. I've probably played too much of the 2nd X-com series game, terror from the deep for a sonic cannon not to have some appeal ) and polaritonic lasing, already been done, but can produce high outputs for relatively low pump energy, extremely energy efficient.
Which isn't to say I'd not do it anyhow just for the interest factor, and seeing what I can learn (I learn a lot better getting my hands dirty than I do from pure theory with no practical applications..it all gets a lot clearer once I SEE how parameters change, and results alter as a result. )
Although primary interest is bio/neurochemistry. Comes in rather handy at times, in a 'myron less the pervert and complete arsehole factor coupled with far better looks, a fair bit older [I swear...my knee and hips are slowly getting ghoulified] and of course minus the slavery bit', kind of way.
(lets just leave THAT part of my hobby as a reference only FO series fans are going to get, that won't attract the kind of attention I don't need, if you get what I mean. Healing if needed is practical in many cases, but so are..some of his other inventions...)
Wish I had his inventory bug though (at least for stimpaks, if you leave the broc flower and xander root in his inventory, as many pairs as he has, you can have him make stimpaks at the same number required at once, without them being used up, nor does the syringe)....what wouldn't I give for those tubs of phosphorus to just infinitely refill themselves, it'd save me about 130-140 euro per 2kg, or my SOCl2 not to fume acid and stink like satan's own flatulence, lose its water-sensitivity and refill itself.
I'd have nothing to do with the rest of that particular little brat kid, but the infinite inventory bug....I could use that alright
Good to see someone else here with an interest in condensed matter physics and science.
Well, I did my MSc in physics on graphene quantum dots, so if you have any questions about how to prepare graphene and construct graphene/hexagonal boron nitride heterostructures for high quality, ask away.
But I can already tell you that all the neat spin-locked states are not something you do in a home lab unless your home lab has some nice measurement amplifiers and possible a dilution refrigerator.
You also need a cleanroom environment to prepare your graphene samples (complete with spincoater, plasma cleaning, and so on), bonding equipment and lot of other non-trivial equipment to actually get somewhere. And for contacting you need some form of lithography, reactive ion etching, gold sputtering... Not trivial.
Graphene is a fun material, though. I always thought about using the odd properties of graphene to potentially build a desktop-sized Free Electron Laser, since surface ripples in graphene can lead to enormous pseudomagnetic fields, and charge carriers in graphene are (sorta) relativistic already.
There was a research project on using graphene in FELs a few years ago, but I'm still waiting on papers from that.
Also, now that large-scale CVD graphene in good quality is finally getting somewhere (my old group from university basically revolutionized the techniques, and now CVD graphene has the same or better properties than exfoliated graphene at millimeter sample sizes), I wonder how well an electrical capacitor made of graphene and hexagonal boron nitride would work. Imagine a few meters of continuous graphene in a stripe about 10 cm tall. Put a few layers of hBN on it (which is a very good insulator, chemically inert and has basically the same lattice structure as graphene), and roll it up into a capacitor. Since the stack of graphene and hBN is less than a 100 nm thick you should get quite a lot of layers in this capacitor, and potentially a huge capacity.
But well, while CVD graphene is able to produce such large samples in the near future, hBN production is not there yet. The combination of graphene and hBN is still relatively new.
If you want to do CVD graphene though, that's actually quite easy, you just need methane, a fused silica tube oven, and some copper.
That could be an interesting choice for a supercapacitor alright, although I confess I haven't researched the dielectric breakdown voltage of the boron nitride.
There is of course, the requirement of synthesis of the boron nitride, and for such applications (barring unpredicted specific effects of dopants) one is going to need ultrapure boron. And the easiest way to that, is a bit hairy to say the least. Borane/diborane. Highly toxic, stinks and at least the latter (never produced diborane-free BH3), is pyrophoric. Like a nastier version of diphospine. Had more to do with pentaborane than either BH3 or diborane.
I'd be prepared to work with it, mind you, I'm not averse on principle to hazmat materials, although I do have my limits (such as I wouldn't go near methyl/dimethylmercury with a 20-foot stick, and I'm leaving all the fluorinated interhalogens out of my interhalogen project, save perhaps some of the iodine fluorides..maybe. Undecided on that one)
I do have a room I could convert for a clean-room as it happens, given that due to my hip and knee issues, I exclusively sleep downstairs, and my bedroom more or less now is just a place to keep books and my microscope, to avoid its being in the proximity of anything disagreeable.
Generally, fairly well equipped, although atm, my main setup is for organic/inorganic work, anything from AMPAkine nootropics to novel opioidergics to run of the mill alkali metal production, and rather well connected in terms of people who are good at getting the kind of things that don't appear on ebay. Got another project in the offing though which is going to require me to covert the never-used bedroom into a cleanroom anyhow, working with Claviceps, ergot fungi, if you are familiar. C.purpurea in particular, although if I can either find any or get any through contacts I think I'd go for C.paspali instead. But as far as keeping things clean goes, I do have some experience at least, I've had a fascination with mycology since, so I am told, 4. Lol, taught myself to read with Phillips et. al. And there is little more annoying than spending time on cultures of organisms only to have them get infested by contaminants.
Interesting little critters they are, but finnicky as all hell made flesh when it comes to culture. Isolating a production strain is time consuming but doable, KEEPING it productive, avoiding senescence is a real bugger, although I have hopes for electrospraying cultures via charged hypodermic needles and oppositely charged baths of a CaCl2 solution, the culture being mixed in with alginic acid, the result being instant polymerization, which in effect simulates a pseudo-sclerotium. The culture, being mixed with a perfluorocarbon emulsion, the objective being the smallest polymer microspheres with the optimal ratio of toughness in culture, given that below a couple of mm, the microspheres become anoxic, and one only gets clavine alkaloids rather than lysergic peptides, the perfluorocarbons serve as oxygen transporters (some, again as emulsions have even been tested for blood replacements for emergencies that unlike simple albumin/electrolyte solutions act not only as volume expanders, but also to transport O2, having in the case of some perfluorocarbons, a higher affinity than haemoglobin.)
I am, I guess, somewhat of a polymath. There is little I am NOT interested in. Anything from scorpion, spider, Hymenopteran, marine venoms and toxins to whatever reading I can find on cosmology to paleontology.
You might find this interesting.
Neat site, this article in particular, seems like NASA are working on proof-of-concept level alcubierre drives. Damn....that one surprised me alright...the thought of even the potential for trips in a few hours to mars, the moons of Saturn.....maybe within our lifetimes if we get lucky. That would be..well..with the way humanity is going, we are going to end up with a home planet that will make fallout's in-game universe look like the garden of bloody eden, and the people with half a brain in their heads are going to have to put up with what the ones in power and the ones with the money are doing, trashing the environment.
So somewhere along the line, people are going to have to get off this particular rock, if we don't manage to get our heads screwed on in the right direction before we tip the balance TOO far towards the fire and brimstone and handbasket option to recover. (no, I'm not religious, but the metaphor is apt enough)
Not found the edit function (is there one?) yet. So, missed the nerd-talk remark. LOL. You've never met me. If you did, aside from the obvious classic autie bit, then I'm as far from obvious as a geek as you'll get. At least on the surface. There is a lot below it obviously, but up top, what one sees, at least when out of the gas mask, blast shield and goggles, elbow-length gloves etc. is combat boots/newrock goth-y boots, combat fatigues torn at the knees (deliberately) and more leather and metal spikes than you'd find in a cybernetically-enhanced bastard child of a hedgehog and a cow.
But, admittedly, I can't very well hide my spock-ish side.
Don't hold your breath for the Alcubierre drive, though. What most articles don't mention is that the Alcubierre metric always requires negative energy, which is theoretically fine, but we have no way of creating it.
Also, the Alcubierre bubble might possibly collect interstellar particles en route and release a massive blast of blue-shifted particles in the direction of travel when the bubble collapses, making it a bit of a planet killer.
Anyway, boron nitride isn't the issue, it's the particular allotrope that's the issue. Hexagonal boron nitride needs extreme pressures to form, and that might be a problem if you want to synthesize large amounts of it.
The edit button is below the post.
/edit: I think there are a few science-threads around. Gotta look for them.
I am aware of the negative energy requirement, but I thought you might find it interesting that the alcubierre drive is actually being tested at proof of concept level. I'm going to have to go digging for that research using sci-hub (you familiar? the paywall cracker? if not I can post the server IP. Its amusing, kazakh student created a way to fake access tokens from unis, to allow free open access to paywalled papers from a HUGE number of journals. And Elsevier (bunch of wankers at best) are absolutely PISSED. Took her to court, from the amount of times her domain names have been relocated, quite a few times, and more or less, her first domain name got shut down, she just pops up like a slavic Lernean hydra, cut off one head and the body sticks up a middle finger and up pop several more heads)
She got takedown orders from court and more or less just told them to go get stuffed. Meanwhile, Elsevier and their ilk are fuming off fury like a bottle of LAH getting pissed in They won their suit, but being located in the rectal sphincter of eastern europe means they can't physically touch her, and the only thing they can do is have domain names taken down, and when they do, they kill one, another four or five get put up. Has me laughing every time.
(I'm really no fan of the big publishing houses, the way they treat the researchers themselves, the unis, and of course, us plebs (I.e the kind of folk who don't work for an institute, don't have the money for a degree, and are self-taught beyond secondary school)
The plebs, so to speak. they wouldn't spit on hobbyists, charging ripoff sums to rent articles for a short time without even letting people print copies. I'm dead against closed access to knowledge on principle. Goes against everything I stand for and work for. No, I'm not above cutting a profit for a while before I release something, but is not somebody who does come up with something good, deserve to enjoy the first bite of the fruit of their labour? that, IMO is fair enough, someone who's worked for something, and potentially worked hard, worked at the bench, down and dirty with toxins, pyrophoric compounds and in some cases stayed up for several days without sleep babysitting something, or spent time sifting through mercury-saturated aluminium amalgam slops, they deserve to enjoy the reward for their work.)
So if you want, I can post the IP to direct connect to sci-hub, the IP remains valid even if the hosts are shot down. Its great...the money I'd never have paid, that in theory if I would cough up for those moneygrubbing svinya, if I had it to begin with I'd be rolling in it by now. If for a project, I need (like the ergot work) I need literally YEARS of reading (I even went as far as buying a hard copy of Kren and Cvak's 'the genus Claviceps'), I'd be paying out £40-60-80 every ten minutes or so at best. If I had to pay that, I'd never be able to so much as afford a test tube, petri dish or bag of agar.
I do know SciHub. At work I can use the university network to get a lot of papers, but SciHub is a neat tool at home.
Proof of concept for the Alcubierre drive is nice and all, but it doesn't matter if the negative energy requirement can't be fulfilled. I mean, if we had negative energy we could also potentially build traversable wormholes and wouldn't necessarily need to create massive gamma ray bursting planet killers to get around
And regarding the potential particle weapon-esque accident potential, of the alcubierre drive, wouldn't, either this be negated by the fact that essentially the warp bubble moves, a finite portion of space, rather than the craft, and leaving a finite space in which to store particles..perhaps could be used to harvest energy, essentially using solar panels. And the fact that a planetary atmosphere, it would require a magnetosphere to be retained, the magnetic field would deflect charged particles, whereas uncharged, highly blue-shifted energy, that would be in the hard ultraviolet range, wouldn't it? and at least, if it would be the case of a 'deceleration blast' be blocked by the atmosphere? because extreme UV doesn't propagate well at all through the atmosphere.
And it would of course have to be tested in unmanned vehicles, and let loose in outer space, away from planetary systems which could possibly harbor life, and if such a phenomenon occurs, an unmanned probe could be fired ahead of the vehicle, with an instrument suite to examine the region outside the warp-bubble both during 'flight' of the vehicle and during shut-down. Examine the range, and determine how practical a pre-approach shut-down would be followed by conventional chemical and/or ion-drive approach systems. Ion drive being slow, but accelerating would allow for a shutdown of a warp-drive far before approach, already have the ion-drive running within the static region of space-time, to in effect catapult the craft, already run-up to speed with the ion drive within the warp-bubble, forwards giving it a heads-up on the whole slow ass acceleration of ion drive technology?
Assuming the idea about using a planetary magnetosphere/atmosphere to block any potential particle storm, would not compensate.
Might end up with us treating a few greys to a spectacular 'aurora xenos', I guess you might call it, though
A hard shower of relativistic particles would potentially strip away the upper atmosphere, and the resulting bremsstrahlung could furthermore destroy the ozone layer. There's a reason why large supernovae and their gamma ray bursts are potential extinction events even when they're very far away (as in, up to thousands of light years).
But it's all hypothetical, because again, outside of the very fringey Woodward effect there's no known way to produce negative energy. Not even a theory, so far it's just a mathematical idea.
Bugger! I should have thought of Bremmstrahlung, and was assuming blueshifting into the UV region rather than hard X-ray to gamma ray wavelengths. Pardon me whilst I go and slap the shit out of myself with a sock full of rabid mink
Welcome to NMA.
Any new people should be taught that the Order subforum is a hosted forum. So it is not part of NMA. Please avoid that place (at least at the start).
That is all.
I would have to know the purpose of it before having a use for it. Which isn't to say, assuming no read-only access restrictions, that I'll not sniff around and see whats what.
But, I'm not here to stir up shit, and generally if something explodes and I'm around (in or out of FO), there was a good reason for it (not counting a few..err..questionable..high-jinx as a kid with various things nitrated/(per-)chlorate-ed and shot into places that such things really shouldn't be shot at/into. )
Here at least, however, I did not arrive to do the community harm. I only give, what is given to me. Unless somebody goes REALLY beyond the pale in life, and has it coming from some source no matter what, or where they are. I only bite people who try to sink their teeth into me first. Unless there is a very good reason. That is a general principle of mine, do as one would be done by (but if someone brings it on themselves then they have nobody to blame but themselves) I apply the same principle to myself, don't get me wrong.
In any case, I thank you for your welcome.
Well, feel free to post in that Dark Matter thread that Hassknecht linked. It is in the Order, but since you're interested and can actually talk to Hassknecht about it there, it seems the perfect place.
My warning about the Order was for all the new people. Sometimes people don't realize that they are not on NMA forums anymore, since there is little to distinguish NMA and the Order with the exception of looking at the top of the threads and see if it says " Home › Forums › Hosted Forums › The Order › * ".
Anyway, hope you enjoy your stay around here .
I'll definitely check it out. I did take a look through the science thread linked also, but...errr...lets just say that a fairly significant proportion of the content is shitposting and jamming up what could otherwise be an interesting thread. And were I desirous of a diet consisting of bollocks, I could simply invest in a homosexual prostitute or ten and take up cannibalism as a hobby. (no, I am neither, if anyone is wondering)
If you are not averse to a quick question, what precisely IS the order? composition? function? purpose of hosting separately? etc.
I did take a quick look over there, inasfar as reading the basic ruleset etc, but that was about as far as it seemed interesting on the first page. Hangout for the old farts, so to speak? (spoken tongue in cheek, no offense is intended)
The Order started as a group of classic Fallout games fans. But over the years it evolved into a group of people with (mostly) compatible personalities. There might be some open hostility to new people outside of the Order that posts in there and that is why I warn people to stay clear, at least at the start.
Basically it is just a group of people that share interests and tastes on things, that hang around, play games and chat together.
Others can probably explain better than I can. I am not the best at writing stuff in English and be understood .
Imagine NMA as a body, and the Order like a non-lethal cancer attached to it.