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User Journal

Journal Journal: feature 6

Spent the last couple of years making my first feature. Shot/wrote/edited/etc it myself on a shoe-string budget. Sent it off to a few film festivals not expecting much. The response thus far has matched my expectations. Hard to compete with people who have a thousand dollars for every one of mine.

The old saw goes it takes ten years to get good at anything. Made my first short back in 1999, keep on feeling like I'm just a single step away from breaking through. But as of yet, nothing.

And so, slogging ever onward. Been debating whether it would be a good idea to self-distribute/release the project under a CC license the same as I have with my shorts. If I sold a few dvds they would pay for the shooting if nothing else.

All I really want any more is somebody out there to watch the damn thing. And this cockamamie scheme would seem as decent as any other. Or rather, something something about doing it for the cause. Thoughts, yay or nay?

User Journal

Journal Journal: What constitutes a good hash anyway? 3

In light of the NIST complaint that there are so many applicants for their cryptographic hash challenge that a good evaluation cannot be given, I am curious as to whether they have adequately defined the challenge in the first place. If the criteria are too loose, then of course they will get entries that are unsuitable. However, the number of hashes entered do not seem to be significantly more than the number of encryption modes entered in the encryption mode challenge. If this is impossible for them to evaluate well, then maybe that was also, in which case maybe we should take their recommendations over encryption modes with a pinch of salt. If, however, they are confident in the security and performance of their encryption mode selections, what is their real objection in the hashing challenge case?

But another question one must ask is why there are so many applicants for this, when NESSIE (the European version of this challenge) managed just one? Has the mathematics become suddenly easier? Was this challenge better-promoted? (In which case, why did Slashdot only mention it on the day it closed?) Were the Europeans' criteria that much tougher to meet? If so, why did NIST loosen the requirements so much that they were overwhelmed?

These questions, and others, look doomed to not be seriously answered. However, we can take a stab at the criteria and evaluation problem. A strong cryptographic hash must have certain mathematical properties. For example, the distance between any two distinct inputs must be unconnected to the distance between the corresponding outputs. Otherwise, knowing the output for a known input and the output for an unknown input will tell you something about the unknown input, which you don't want. If you have a large enough number of inputs and plot the distance of inputs in relation to the distance in outputs, you should get a completely random scatter-plot. Also, if you take a large enough number of inputs at fixed intervals, the distance between the corresponding outputs should be a uniform distribution. Since you can't reasonably test 2^512 inputs, you can only apply statistical tests on a reasonable subset and see if the probability that you have the expected patterns is within your desired limits. These two tests can be done automatically. Any hash that exhibits a skew that could expose information can then be rejected equally automatically.

This is a trivial example. There will be other tests that can also be applied automatically that can weed out the more obviously flawed hashing algorithms. But this raises an important question. If you can filter out the more problematic entries automatically, why does NIST have a problem with the number of entries per-se? They might legitimately have a problem with the number of GOOD entries, but even then all they need to do is have multiple levels of acceptance and an additional round or two. eg: At the end of human analysis round 2, NIST might qualify all hashes that are successful at that level as "sensitive-grade" with respect to FIPS compliance, so that people can actually start using them, then have a round 3 which produces a pool of 3-4 hashes that are "classified-grade" and a final round to produce the "definitive SHA-3". By adding more rounds, it takes longer, but by producing lower-grade certifications, the extra time needed to perform a thorough cryptanalysis isn't going to impede those who actually use such functions.

(Yes, it means vendors will need to support more functions. Cry me a river. At the current scale of ICs, you can put one hell of a lot of hash functions onto one chip, and have one hell of a lot of instances of each. Software implementations are just as flexible, with many libraries supporting a huge range. Yes, validating will be more expensive, but it won't take any longer if the implementations are orthogonal, as they won't interact. If you can prove that, then one function or a hundred will take about the same time to validate to accepted standards. If the implementations are correctly designed and documented, then proving the design against the theory and then the implementation against the design should be relatively cheap. It's crappy programming styles that make validation expensive, and if you make crappy programming too expensive for commercial vendors, I can't see there being any problems for anyone other than cheap-minded PHBs - and they deserve to have problems.)

User Journal

Journal Journal: Beowulf MMORGs 3

Found this interesting site, which is focussing on developing grid computing systems for gaming. The software they seem to be using is a mix of closed and open source.

This could be an important break for Linux, as most of the open source software being written is Linux compatible, and gaming has been the biggest problem area. The ability to play very high-end games - MMORGs, distributed simulators, wide-area FPS, and so on, could transform Linux in the gaming market from being seen as a throwback to the 1980s (as unfair as that is) to being considered world-class.

(Windows machines don't play nearly so nicely with grid computing, so it follows that it will take longer for Microsoft and Microsoft-allied vendors to catch up to the potential. That is time Linux enthusiasts can use to get a head-start and to set the pace.)

The question that interests me is - will they? Will Linux coders use this opportunity of big University research teams and big vendor interest to leapfrog the existing markets completely and go straight for the market after? Or will this be seen as not worth the time, the same way that a lot of potentially exciting projects have petered out (eg: Open Library, Berlin/Fresco, KGI, OpenMOSIX)?

User Journal

Journal Journal: The Lost Tapes of Delia Derbyshire

Two hundred and sixty seven tapes of previously unheard electronic music by Delia Derbyshire have been found and are being cataloged.

For those unfamiliar with Delia Derbyshire, she was one of the top pioneers of electronic music in the 1950s and 1960s. One of her best-known pieces was the original theme tune to Doctor Who. According to Wikipedia, "much of the Doctor Who theme was constructed by recording the individual notes from electronic sources one by one onto magnetic tape, cutting the tape with a razor blade to get individual notes on little pieces of tape a few centimetres long and sticking all the pieces of tape back together one by one to make up the tune".

Included in the finds was a piece of dance music recorded in the mid 60s, examined by contemporary artists, revealed that it would be considered better-quality mainstream today. Another piece was incidental music for a production of Hamlet.

The majority of her music mixed wholly electronic sounds, from a sophisticated set of tone generators and modulators, and electronically-altered natural sounds, such as could be made from gourds, lampshades and voices.

Christmas Cheer

Journal Journal: for those of you not on multiply... 4

boyfriend of tuxette and I graded successfully to P5 in Krav Maga on Thursday. Next up is G1 and we won't be allowed to grade to that for at least another year :-)
User Journal

Journal Journal: Well, this is irritating. 3

Someone has trawled through YouTube and flagged not only the episodes of The Tripods, but also all fan productions, fan cine footage and fan photography of the series. How so, can't you buy it on DVD? Only the first season, the second exists only in pirated form at scifi conventions, and of course the fan material doesn't exist elsewhere at all. The third season, of course, was never made, as the BBC had a frothing xenophobic hatred of science fiction at the time. (So why they made a dalek their general director at about that time, I will never know...)

What makes this exceptionally annoying is that the vast bulk of British scifi has been destroyed by the companies that produced it, the vast bulk of the remainder has never seen the light of day since broadcast, and the vast bulk of what has been released has been either tampered with or damaged in some other way, often (it turns out later) very deliberately, sometimes (again it turns out later) for the purpose of distressing the potential audience.

I've nothing against companies enforcing their rights, but when those companies are acting in a cruel and vindictive fashion towards the audience (such as John Nathan Turner's FUD of audiences being too stupid to know what they like, or too braindead to remember what they have liked), and the audiences vote with their feet, on what possible grounds can it be considered justified for those companies to (a) chain the audience to the ground, and (b) then use the immobility of the audience to rationalize and excuse the abuse by claiming the audience isn't going anywhere?

I put it to the Slashdot Court of Human/Cyborg Rights that scifi fans are entitled to a better, saner, civilized explanation, and that whilst two wrongs can never make a right, one wrong is never better.

Christmas Cheer

Journal Journal: wheeeee!

Just so I can boast about it here as well... I'm going to Svalbard next week! :-D

For business. But still...

Linux Business

Journal Journal: update for those of you who aren't on Multiply 7

Let's see...

- The new job (started 3rd of March) is going OK though there are still quite a lot of adjustment pains. At the very least I have close to a carte blanche when it comes to going to external courses and conferences, which is quite cool.

- It's finally warm enough to start running outside. Yay!

- Still doing Krav Maga. Some of you know I missed out last semester due to an injury, but now everything seems to be OK. I'm not sure if I'll go up to P5 this semester though.

- I met an ex-slashdotter/Multiply refugee in real life, making the total to three.

- I've been taking lots of bird photos lately, but I really need to learn how to use my camera properly. It's good to know I'm not short on subjects :-)

- I have mod points :-D

How are you all doing?

User Journal

Journal Journal: 1nm transistors on graphene

Well, it now appears the University of Manchester in England has built 1nm transistors on graphene. The article is short on details, but it appears to be a ring of carbon atoms surrounding a quantum dot, where the quantum dot is not used for quantum computing or quantum states but rather for regulating the electrical properties. This is still a long way from building a practical IC using graphene. It is, however, a critical step forward. The article mentions other bizare behaviours of graphene but does not go into much detail. This is the smallest transistor produced to date.
It's funny.  Laugh.

Journal Journal: the stick of pain 1

You know you're in for a training from hell when the instructor says that he's going to whack you with the stick of pain if your tempo (when doing drills) is too slow...

It was a good training though :-)

The Gimp

Journal Journal: Nebbeline 3

I've written about Nebbeline on Multiply. Thought I'd share her with everyone over here...

And don't forget to visit Wolfgangkloof ;-)
PC Games (Games)

Journal Journal: Scientific and Academic Open Source - Hotspots, Black Holes

One of the most fascinating things I've observed in searching for Open Source projects available for whatver I'm doing at the time is the huge disparity of what is available, how it is used and who is interested.

An obvious place to start is in the field of electronics. Computer-based tools are already used to build such stuff, so it's a natural replacement, right? Well, almost. There are tools for handling VHDL, Verilog and SystemC. There are frameworks for simulating both clock-based and asychronous circuits. You can do SPICE simulations, draw circuit diagrams, download existing circuits as starting points or places of inspiration, simulate waveforms, determine coverage and design PCBs. OpenCores provides a lot of fascinating already-generated systems, SUN provides the staggering T1 and T2 UltraSPARC cores, and the Sirocco 64-bit SPARC. This field has probably not got anywhere near what it needs, but it has a lot.

Maths is another obvious area. Plenty of Open Source tools for graphing, higher order logic, theorum provers, linear algebra, eigenvalues, eigenvectors, signal processing, multiple-precision, numerical methods, solvers for all kinds of other specific problem types, etc.

What about astronomy? That requires massive table data crunching, correlation of variations, moving telescopes around with absolute precision - things computers tend to be very good at. There are a few. Programs for capturing images are probably the most common, although some telescopes provide software for controlling telescopes, obtaining data and performing basic operations. Mind you, how much more than this does one need in software? Some things are better done in hardware (for now, at least) because the software hasn't the speed. Yes, the control software seems a little specialized, but it'd be hard to make something like that general-purpose.

Chemistry. Hmmm. Lots of trivial stuff, more educational than valuable - periodic tables, 3D models of molecules, LaTeX formatting aids. There's a fair amount on the study of crystals and crystallography, which is as much chemistry as it is physics, but there's not a lot else. Chemistry involves a lot of tables (which would be ideal for a standardized database), a lot of mathematical equations, formulae, graphing, measuring and correlating all sorts of data, the consequences of different filtering and separation techniques, the wavelength and intensity of energies, analysis of the results of atomic mass spectrometry or other noisy data, etc. I see the underlying tools for doing some (but not all) of these things, but I don't see the heavy lifting.

Archaeology has very few non-trivial tools. Some signal processing for ground-penetrating RADAR, but there are virtually no tools out there that could be useful for helping with interpretation. In fact, most RADAR programs don't interpret either but display the result on a small LCD screen. Nor do any tools exist for correlating interpretations (other than manually via an extremely naive - for this purpose - GIS database). There's a few scraps here and there, but signal analysis and GIS seem to be about it, and those were mostly developed for mining companies and tend to show it.

Biology has plenty of DNA sequencing code. By now, Slashdotter should be able so sequence eith own DNA, not pay someone a thousand to do it. You mean, those aren't enough, that you need more hardware? And a lot more software? It's an important step, but it's not unique.

Mechanical Engineering. I haven't seen anything of any significance.

Geology. Not really, beyond the same software for Archaeology, but using it for find seams in rock.

Psychology: Nada.

Psychiatry: None.

Sports: Lots of software getting used, but little of it is open source.

Result - those who gain with the least to lose and the most to win make the change. Those who feel like there's no benefit from changing what they're doing will continue doing what they're doing. My suggestion? There are gaping holes in Open Source. Fill them in.

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