Category Archives: Objects

Churchill Mfg. 180mm RKP Trucks

I’m in the process of putting together a second longboard – there will be more posts about that in the next couple days, but I wanted to put up some detailed pictures of the Churchill Mfg. 180mm 50° Reverse Kingpin trucks, since there were none to be had when I went looking. The ineterwebs are all abuzz about how inexpensive and decent they are, but I couldn’t find any side-by-side comparisons with an established brand when shopping. To that end, there are some comparison shots with classic Paris 180mm 50° Reverse Kingpin trucks in the gallery. I’ll also note that they look an awful lot like Stealth Trucks without the raised sections on the triangle portion of the hanger.

Some notes from the pictures:

  • They ship with speed rings, which is both a nice touch and possibly important because the end of the hanger at the axle isn’t faced.
  • In fact, there is no sign of any post-casting machining whatsoever. The finish is pretty good for a casting, though – they may be sandblasted or tumbled or somesuch.
  • The Churchills are about 1/8″ higher than Paris’, but that may just be a difference of bushings. They look the same height in the pictures because the Paris’ are mounted on 1/8″ shock pads. The Churchills have the stock bushings in, and the Paris’ have 81a Venom standard barrels board-side and 85a Khiro barrels street-side (which should probably be the other way around).
  • The bushings they ship with are cherry red translucent 92a double-cones of unknown origin. They kind of remind me of the ones Paris’ come with, which likely means they will be replaced soon, but I’ll give them a ride before passing judgement.
  • The bushing seats are shallower but tighter than the Paris’, I’m not sure how that will translate when riding.
  • The kingpin is an absolutely standard carriage bolt, 3/8″ – 24tpi, 1/2″ hex head, 1″ threaded length, 2.75″ total length. I suspect it could be replaced from stock at a home improvement store.

Conclusion: These trucks are $20+S&H per pair, and appear to be functionally equivalent to the classic ~$50 sets from Paris and Randall. I haven’t taken them out riding yet, but inspection says they are extremely comparable. I’ll have a more informed opinion after some riding, and only time will tell if the axle/kingpin steel is as good.
Edited to add disassembled picture and note from disassembly.

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Watch as a Phone Stand


I do this all the time and didn’t realize it was unusual until someone pointed it out the other day. I wear a somewhat clunky metal watch (to use as a grounding strap) and it makes a pretty solid portrait orientation phone stand. Might be a useful trick for someone else.

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Google Exit Plan

I started writing this as notes for my own use, and wasn’t really planning to post it publicly. However, I didn’t find any comprehensive google exit plans that were suitable for people in my position, and it seemed like an interesting area for discussion, so up it goes.

While making my regular Google backups (detailed below in “Backup ALL the Things”) over the weekend, I decided it was time to update my plans for bailing out of google’s services if necessary, and discovered that there may be superior alternatives to some of the services I’ve been depending on. Google’s vast infrastructure, development resources, ubiquity and integration have tended to make them better than self hosted options. The fact that they are a single party who has thus far been generally responsible with user data makes them more attractive than other hosted solutions. Both of those situations are subject to change.

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Touchpad Cyanogenmod 9

My Touchpad (AKA “The Mobile Platform Test Device”) has had both its OSes updated in the last couple days. WebOS bumped from 3.0.4 to 3.0.5, and I updated the Android install from Cyanogenmod 7 Alpha 3.5 (Gingerbread based) to Cyanogenmod9 Alpha0 (Ice Cream Sandwich based).
tl;dr version: Cyanogenmod9 is, by virtue of speed and features, at rough pairty with WebOS, even though its interactions are uniformly worse.
Details below.
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Touchpad Dual-Boot

I dual booted my Touchpad with CyanogenMod last week, and it has made me notice a lot of things about the Touchpad, WebOS, and Android that I hadn’t fully appreciated before. I wish I had thought to post these as snippets instead of a wall of text, but I foolishly gathered them up and am posting as a set.

Details about putting CM7 on the Toucpad are here in this RootzWiki forum thread. Yes, their page and documentation are a forum thread with 100+ pages of screeching morons obscuring the content – that’s how the Android community tends to be.
The whole CM7 install process is pretty graceful – I had a minor hiccup in that it claimed the gapps would be installed on the first ACME run if I put them in the cyanogeninstall directory, but I had to go in with ClockWork and flash them later – then it hung on the setup autorun on the next boot. Fine after that. During the initial install, I found myself using the phrase “Oh jeez, there is some Linux shit going on”  — it looks like the ACMEInstaller is just a fancy initrd image with some utilities and scripts baked in that does some FS manipulation and archive decompression.  I appreciate it when Linux is Linux. 
Onward to notes:
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Canon Cat

Clip from Canon Cat Advertising Materials

I’m not sure why there has been a spate of tech news artcles about the Canon Cat recently, but it’s really refreshing to see. I assume it started because someone spotted this nice document dump, and the tech news world is an echo chamber.

Many of the articles note that the manuals and such come with (mostly) complete circuit designs, but they miss the other interesting bit of technical openness – Cats were running a totally introspective user accessible software stack written in a dialect of Forth. In addition to having a UI that is still a popular example for application specific computing devices, it was also user programmable/modifiable almost down to the hardware. I’m not a fan of Forth, but it demonstrates that 1. It is possible to make an embedded computer programmable without interfering with its UI model, and 2. It is possible to design introspective systems which are usable, which are right in line with what I want to be doing with myself next, and totally out of line with current trends in computing. It brings to mind Alan Kay‘s work, or a more reasonable LISP machine.
The other reason I’m fascinated by the Cat is that it manages to make a completely modeless text editing system, and its development spawned several papers (in the linked documents) on the topic. I despise implicit modality in user interfaces (this is why, despite having all kinds of wonderful features, the traditional progammer’s editors just end up making me furious), and good through theoretical and case studies supporting that stance are a beautiful thing.

That dump is slightly different collection of Canon Cat materials that I put together when I was curious after reading The Humane Interface a couple years back. I’m still integrating the collections, but there seems to be some different stuff in each – piles of arbitrary format documents are hard to diff, especially when there is no name correspondence and some are binary formats. I think there may be enough material in the various available sources that, given access to an operable CAT and a reasonable digital lab, it would only be a large 10s/small 100s of man hours of work to emulate or even hardware simulate one.
I’ve never (actually, I think I ran into one as a kid but did’t know what it was at the time) had a chance to play with a real Canon Cat, and owning one would be a mixture of all the standard problems in owning vintage computing stuff – they’re expensive and collectible, and like most computers of the era, bulky and fragile, and they require problematic media… but I would still probably get one if I had the chance for a reasonable price, because they did so many interesting things right. More and more I think CS/EE programs should include (probably just as an elective) proper History of Computing courses – if my intended life pattern continues, I may even get to teach one for a while. I think it would be a blast for all involved.

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Teaching Embedded Systems (with Arduino)

Now that the classes are winding down, I want to write up some internet-accessible notes about the embedded systems unit I designed and taught for EGR199 this semester. The unit went well, and I can see basically the same materials being reused, so having a nice content dump for me or any other instructor to use is worth the effort. Long winded version after the fold.
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Touchpad

I picked up one of the $150 refurbished 32GB Touchpads in the last firesale on Sunday. It seems like HP has done their very best to get as many Touchpads into the hands of hackers as possible, so whether or not it is well supported by HP, the community will do something fun with it. Besides, a $150 ARM developement platform that will boot Android, various Linux chroots, AND let me play with WebOS was too appealing to pass up.
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SC11: A Review in Schwag


This is the less serious bit of review from SC’11, but there is fun to be had and a certain amount to be learned from the pile of schwag that comes back. The schwag pile is comparable to last year’s, but I was actively aimed toward useful or at least interesting junk this year, since I have > three cubic feet of this crap packed away now. Part of the point of this post is just to give credit (and links) to places that gave me cool stuff.

I find I actually use the various random bags I get, so I always end up with quite a few. Several were particularly nice: For the second year in a row, I would actually USE the conference bag (Back left corner) on it’s own, and I got another one of the ridiculously tough Tyan/Intel bags (far back, standing) which are handy for groceries and toting stuff around campus. Indiana University had a nifty little sling bag that I could contrive uses for (next to conference bag), and the giant blue CSC bag can consolidate a remarkably large pile of crap.

With regard to apparel, Silicon Mechanics again had the nice florescent green on black logo tee that I wear all the time, although this year’s has some text on the back that makes it a little less cool. We hung out for a while talking to the Pogo Linux folks and were handed a pile of their shirts (logo on front, gold circle around Tux on back, back visible in picture), which are pretty nice. The Adaptive Computing/MOAB “Lifes a Batch” shirt is clever in the same way the Platform Computing “Whatever” shirt from a few years ago – I don’t know that it will get worn much, but it’s a memorable marketing effort (and, by the way, Moab has become really impressive – it can do PVM type tricks that PVM can’t, and look good doing it). NIMS (I’m slightly embarrassed to say I don’t remember which relevant organization with that acronym it was) had nice Beanies which may see some use this winter. I have some fuschia compact umbrellas from the conference daily giveaway (I think IBM payed for/logo’d them) to be given as gifts – we brought back one or two each… plus a box of a dozen after they stuck the remainders out.

Going through the gallery of other neat stuff in order of a appearance:

  • Huge props to Samtec. I don’t recall seeing them at SC in previous years, but as an interconnect hardware vendor, it’s an entirely reasonable place for them to be. In addition to the fairly nice hat/pen/screwdriver schwag items and interesting to chat with booth staff, they were giving out trays of sample parts. I picked up the “Sample Solution” and “Rugged Power” kits, since those are the kinds of connector I use most, but the adviser picked up a full set to keep on file for helping students doing projects pick parts. Looking through them I wish I had picked up one of the R/F component boxes, because it had a gorgeous assortment of $Random_antenna_connector to SMC pigtails in it. I think I’ll be preferentially ordering/recommending connectors from them for a while.
  • Penguin Computing was dispensing nice umbrellas in addition to their standard “Sit through our talk for a 6″ Stuffed penguin” routine. I talked management tools with a rep for a while, but didn’t attend the talk this year.
  • Several places had nice small papergoods. I consume little notebooks and packs of post-its and tape flags pretty regularly, and can’t remember the last time I paid for them.
  • Isilon had a nice little screwdriver pod thing. There can never be enough multitools.
  • HP was handing out a … dorky green thing. It’s cute, and charming, and its belly is a lint-free screen cleaner, but I can’t figure out what the hell it is (alligator?). I think the confusing object is representative of their confusing business decisions of late – they had a carnival tricks theme going in their booth which also fits circus grade management.
  • AMAX and Extreme Networks gave me flash drives, in addition to the proceedings drive (which is 2Gb and looks like a Kingston like the last two years, but the USBID says knockoff). Apparenlty I missed some even nicer flash drives from other places that group mates found. Flash drives are always useful and appreciated.
  • The NNSA ASC booth was shoveling Flexible USB Lights out of their booth the last day, and I took a couple. I’m not sure what I’d use them for, but they appear to be identical to this $10 thing at Thinkgeek, so there’s that.
  • The Arctic Region Supercomputing Center booth was not very well staffed, but they had their usual reusable chemical hand warmers, which is a great gimmick.

The “trick-or-treating for grownups” vibe of going schwagging on the floor is a bizarre joy of supercomputing, and, in addition to the standard “memorable schwag makes you memorable” marketing function, actually provides an important mechanism for striking up conversations and encouraging attendees to make good coverage of the exhibit floor. I have a not inconsiderable list of organizations who have bought good vibes with a few cent trinket, and I am the sort of person who gets solicited for tech and academia advice, so the trinkets are doing their job.

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Bookish Dreaming

I only remember a dream every year or so, but I realized on the way back from getting breakfast with friends this morning that a book I thought I’d been reading was entirely in a dream. It was a long dream with various dream-space fucked-up-ness to the setting building (No University space is that large, that nice… or has three large highly styled cafe/lounge spaces in the same complex) and interaction with various old acquaintances, but there was one section I didn’t realize was a dream because it was so normal:
< dream content >
I picked up a book (roughly A4 sized, and inch or so thick, nicely black cloth-bound with gold embossing) about code generation for a particular class of exotic hybrid-SIMD machines (I remember details, which are realistic, but not specific enough to pick out which machine) by David Padua (respected figure in parallel computing, who I’ve met at conferences) and a coauthor I couldn’t remember when I woke up. I got the book from a well stocked engineering library, and discussed it with various engineering types I know, including my current adviser.
< /dream content >
Until we were headed back from breakfast and I realized the setting was “improbable,” I was sure it had happened. When I got home I had to see if it was something I may have seen referenced – the content and authors were probably based on “Optimizing data permutations for SIMD devices.” which I read a year or two ago, but it isn’t an exact match. The description I remember also matches a section in Encyclopedia of Parallel Computing (four volume, $1500) book that I’ve never seen before (and now want access to). I also want the dream book, because it would be all kinds of useful for my MS project.
Aren’t brains interesting…

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