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April 17 2015

September 05 2013

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DIY kindle scanner
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May 30 2013

peterpur
3145 c74d 500
Kamakura
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January 18 2013

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minute-a-day 18.1.2013

January 15 2013

peterpur

email, gesendet an all@informatics am 15.1.2013

liebe kolleginnen und kollegen,

am 11. januar ist aaron schwartz gestorben. ich würde gerne ein paar minuten ihrer zeit beanspruchen, um auf die relevanz seiner arbeit für die wissenschaft einzugehen. 

aaron swartz war sw-entwickler und hacktivist. bereits im alter von 14 jahren entwarf er gemeinsam mit anderen die erste version von RSS und schaffte damit einen standard, der die entwicklung des internet nachhaltig beeinflusste. 

wesentliche spuren hinterließ aaron swartz, wenn es um die frage des freien zugangs zu (freier) information geht. so lud er beispielsweise in großer zahl gerichtsdokumente aus einer datenbank herunter, deren zugang zwar kostenpflichtig war, deren inhalt jedoch aus gemeinfreien informationen bestand, und stellte diese daten frei zur verfügung. damit erregte er zwar den ärger der betreiber - und interessanterweise auch der staatsanwaltschaft - obwohl der vorgang vollkommen legal war.

in den letzten jahren hat er vor allem dadurch aufsehen erregt, dass er die auf JSTOR kostenpflichtigen artikel unter ausnutzung eines kostenlosen zugangs am MIT in großer zahl heruntergeladen hat. für dieses vorgehen wurde er unter anwendung der terror-gesetzgebung verfolgt. die motivation für sein handeln war über jeden zweifel erhaben klar: er wollte freien zugang zu diesen texten schaffen. 

wissenschaft, das wissen wir alle, funktioniert am besten, wenn information für alle zugänglich ist und ein offener austausch stattfinden kann. wir alle profitieren davon, wenn wissenschaftliche texte frei zur verfügung stehen. 

dennoch wurde er von der staatsanwaltschaft mit aller möglichen härte des gesetztes als terrorist (!) verfolgt und mit 35 jahren haft und millionen dollar strafe bedroht. dieses szenario war es wohl auch, das den schon vorher depressiven aaron swartz zum selbstmord gebracht hat: »driven to the edge by what a decent society would only call bullying« [cory doctorow]. 

in einer form des erinnerns und des protests haben wissenschaftler in aller welt begonnen, sämtliche selbst verfassten wissenschaftlichen texte freiwillig und kostenlos auf der eigenen webseite zur verfügung zu stellen, ungeachtet eventueller verpflichtungen gegenüber publishern. ich möchte ihnen zum abschluss dieser mail nahelegen, ähnliche schritte zu setzen. 

es war schon seit einiger zeit deutlich sichtbar, wie dringend wir eine veränderung in der wissenschaftlichen publikationslandschaft brauchen: weg von publishern, die uns für die wissenschaftliche reputation teuer bezahlen lassen, hin zu offenen, kooperativen und ausschliesslich an wissenschaftlichen bedürfnissen orientierten modellen. 

mfg
peter purgathofer

ps: anbei zwei links für die weitere beschäftigung mit der sache: 
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January 01 2013

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studies in idleness

October 24 2012

peterpur
Perspective transformation is the process of becoming critically aware of how and why our presuppositions have come to constrain the way we perceive, understand, and feel about our world; of reformulating these assumptions to permit a more inclusive, discriminating, permeable and integrative perspective; and of making decisions or otherwise acting on these new understandings. More inclusive, discriminating permeable and integrative perspectives are superior perspectives that adults choose if they can because they are motivated to better understand the meaning of their experience.
— MEZIROW J and Associates (1990) Fostering Critical Reflection in Adulthood San Francisco: Jossey-Bass
Reposted bymunaj munaj

October 19 2012

peterpur

iCloud »d'oh« tip

i just found out how to open documents stored on iCloud with programs other than the one you stored them in. it´s really kind of a d'oh thing: drag the docoment from the iCloud open dialog in the original app onto the app you want to open them. that's all. 

September 17 2012

peterpur
0175 608f 500
Frauenanteil Studienanfänger/innen WS 2009-2012
 Auch wenn die »M«-Fächer eine leichte Steigerung verzeichnen - Frauenanteil unter Informatikstudierenden weiter im Sinkflug!


NACHTRAG: Die Daten sind unvollständig, weil in TISS nur die Studierenden gelistet werden, die auch Studienbetrag bezahlt haben #epicfail
Reposted bysputnik27lordminxstormsnaturalismuspulegonmynniaemishallowboxcateglerion-justforfunpsygateBalanagroeschtlbrightbytemondkroeteflopsboxhairinmysofiaslotterleben
peterpur
0170 a238 500
Studienanfänger/innen WS 2009-2012
Anfänger/innen-Zahlen in der Informatik seit 2010 halbiert.  
Daten: http://www.tuwien.ac.at/wir_ueber_uns/zahlen_und_fakten/daten/

NACHTRAG: Die Daten sind unvollständig, weil in TISS nur die Studierenden gelistet werden, die auch Studienbetrag bezahlt haben #epicfail
Reposted bymynniaSkepticalemishallowsrecnigboxcatgroeschtllordminxresanaturalismuswoifbigbear3001mondkroetefeminismNorkNorkflopsboxfinkreghFreXxXMerarikampfbrotdrayasha

July 19 2012

peterpur
This is a disastrous situation for musicians, as well as for music fans and countless businesses. In fact, it suits absolutely nobody—apart from the cynical lawyers who run the music labels, the lobbying groups, the House, the Senate, and several parasitic law firms like my own.
— Rob Reid: Year Zero
Reposted byshallowbrightbytemondkroeterenanaquicquid

April 11 2012

peterpur

My review of the Cregle iPen

As soon as i saw the iPen project on kickstarter, it was clear to me that i need one, so i supported the pen right away. It was my first kickstarter project, and i was quite excited when the package finally arrived, after month of waiting due to the Apple certification process for accessories. Would the pen be able to hold up with my expectations? 

Turns out: yes and no. It's better than expected, worse than hoped for. With this review (as you might have noticed already, i don't write many reviews) i want to explain this position. 

Executive summary

More than anything else, the iPen is a promise. It shows the potential of having a high-resolution pen digitizer with the iPad. It transforms the iPad into a serious work machine, one that i would not want to miss in my daily routine. As it is, the handling of the iPen as well as it's limitations make sure that the iPen shows this potential more than it can actually deliver on it's promise. In the end, i crave an iPad with a built-in precision pen digitizer. 

Still, for someone willing and able to cope with these limitations (which i will describe below), the iPen is posed to become a indispensable addition to the iPad. 

What is the iPen

The iPen is not one of these general-purpose iPad pens that mimic the capacitative qualities of the human finger. Instead, it uses it´s own digitizer that has to be plugged into the dock connector port and protudes a little above the surface of the iPad. The pen itself is an active, battery powered device that sends out (according to the web site) ultrasonic and infrared signals so that the digitizer plugged into the iPad can determine it's location on the screen. Because it is more or less impossible to write »drivers« for iOS devices, the position sensing works only in Apps that make use of Cregles iPen API. 

Developers who want their Apps to use the iPen have to incorporate the necessary libraries and calls into their Apps, and they have to change the Apps so that it works with the iPens slightly different interaction model. This means mainly discerning between finger input and pen input, but also eg. offering a possiblity to calibrate the pen. 

To this end, it's unclear whether the iPen will see widespread support by App developers. As i was writing this review, six Apps have a version available that supports the iPen, with five more apps promising to be released with an appropriate version in the near future (according to cregle.com). So far, i've only been using the iPen with the free version of GoodNotes, which is basically a rather simple sketchbook app. My favourite sketching app, Noteshelf, is on the »promised«-list, so i'll hold out for it. 

The good

As soon as i started using the iPen (after the obligatory calibration), it became clear that the resultion and tracking speed of this device is far superior to anything the built-in multitouch sensor of the iPad can offer. There is a noticable delay between writing and appearance on screen. At the moment, i cannot say whether its the result of sluggish App refresh, or if the process of getting the tracking data to the App just takes too long. The fascinating fact is that this delay does not result in data being lost, and subsequently being substituted by interpolation. The line that is drawn after a short delay mimics the movements i've executed quite precisely, and while it does take some time for the line to appear, it is exactly where it should be. 

This means that producing any fine structures in drawing simply works. Handwriting works. A quickly drawn rectangle does not turn out to be a rounded rectangle. Cross-hatching is possible. You can start a line exactly where it meets the other line. That alone is a truely awesome experience, and i have filled pages and pages with idle doodles and nice sketches just probing this potential. 

One more goodie: once the software starts discerning between finger input and pen input, you can actually rest your hand on the screen. This is liberating for anyone who has used a capacitative pen, and it allows you to really sketch and draw in a natural way. Minor complaint here: you have to turn off the beloved four-finger swipes ("multi-tasking gestures" - Apple should let Apps disable them, so that the user does not have to). 

My verdict: more than worth the money, this is a game-changing experience, and i want more of it. If you stop reading this review now, take with you that a high-def pen digitizer is something the iPad really really needs. Let's hope Apple hears this. 



The bad^H^H^H less good

Unfortunately, this awesomeness comes at a price, a price that is ultimately connected to the technology chosen. It probably starts here: as far as i can judge, the part of the pen tracked is not the tip of the pen itself, it's the part that looks like a cage approx. 5mm above the tip. This means that the pen is extremely sensitive to tipping and tilting. If you hand the pen to somebody else (who will most likely hold it differently than you), she will experience a less-than-stellar performance with the line being drawn a couple of mm besides the tip of the pen. But even a single person ofthen has multiple different pen positions for sketching and drawing (eg. different for drawing long horizontal or vertical lines, or while crosshatching different directions), and this breaks the iPen digitizing precision. Also, sometimes i want to rotate the iPad like a piece of paper while sketching. All these things are a no-go, as the tilt of the pen has essentially to be stable all the time. 

A minor quibble is that the digitizer is attached to the dock connector port. This means that i usually have to use the iPad upside down, which positions the home-button on the top border of the iPad. In landscape mode, the home button ends up on the left side of the iPad for a righty like me, which is the opposite of my usual orientation. Also, as the home button is where the digitizer is, every so often i inadvertendly touch the digitizer, tilting it just slightly towards the case on one side. Due to the nature of interpolation, this introduces a noticable error on the far end of the digitizer range. This would have been avoidable: two little rubber dots could stabilize the tilt of the attached digitizer - a solution that everybody can attach for himself. 

Finally, it's not built-in. You have to carry around one more piece of technology. While Cregle does ship the iPen with a nice bag for both the pen and the digitizer, it ends up being something that i don't have with me every now and then. This once again drives home the point that the high resolution pen digitizer is something that has do be built into the device. This would also solve the other quibbles i have with the iPen. Unfortunately, this is not something Cregle can do. 

Conclusion

The iPen is awesome when it works. It requires some getting-used-to, so it's hard to demo to somebody, which in turn makes it hard to sell. It has become an integral part of how i use the iPad, and makes me want for more. I want Apple to produce an iPad with built-in hires pen digitizer. 

For the time being, i will not part with the iPen. I find myself using GoodNote a lot, and I can see the iPen becoming part of my daily work as soon as it is supported by the Apps I love and use daily (NoteShelf, PDF Expert. DrawSomething would be also be nice :). I can live with the drawbacks, but i know i'm an early adopter who has done that a lot of times (Tpin Dibbaert!). Thank you Cregle for making an awesome product, especially as it demonstrates a whole new side of the iPad. 

March 13 2012

I’ve been forced to explain homosexuality to my kids (aged 3 and 4) because their uncle is gay. This incredibly difficult and traumatic experience went as follows:

Child: Why does Uncle Bob go everywhere with Pete?
Me: Because they’re in love, just like Mummy and Daddy are.
Child: Oh. Can I have a biscuit?

We’re all scarred for life. Scarred, I tell you.

— KateP, Internet commenter (via cocklordsimone)
Reposted fromekelias ekelias viamatisoup matisoup

February 29 2012

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epic sax cat.m4v
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February 22 2012

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vorratsdatenspeicherung
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October 21 2011

peterpur
best tip ever
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October 12 2011

peterpur
designsituation, teil 2 (reaktion auf die vorschläge per twitter):

- spiegel sind leider unmöglich, u.a. wg. der art, wie die tür aufgeht, aber auch, weil das fluchtwege gefährden würde
- ggüber des neuen eingangs ist der bibliotheks/meetingraum
- der wechselseitige "facetime"-vorschlag gefällt mir noch am besten. 
- eine andere idee wäre der "spion", also so ein guckloch in der tür mit weitwinkel, nur digital, und wenn wer läutet oder die tür öffnet (je nach modus), dann machts ein foto. 
Tags: notweet

October 11 2011

peterpur
na, mit überwachungscharakter waren tatsächlich die besucher gemeint...
peterpur
designsituation: in der argentinierstraße sitzt die sekretärin in einem raum, von dem aus man nicht sieht, wer beim institutseingang hereinkommt. das ist aber notwendig, nicht nur als orientierung für besucher (an wen soll ich mich wenden?) sondern auch als eine art der zugangskontrolle, um unsere arbeitsform der "offenen türen" weiterhin aufrecht zu erhalten. 

wir suchen daher einen weg, wie die sekretärin mit jeder/jedem gesichtskontakt haben kann, der/die das institut betritt. wir wollen allerdings vermeiden, dass das ganze einen überwachungscharakter hat. 
Tags: #notwitter
Reposted byk1r4n3ry5 k1r4n3ry5

October 08 2011

peterpur
a pixar goodbye to steve jobs
Reposted byancurumtruemk1r4n3ry5deinneuerfreundmajkeyAbberkamhedgy-hoggymomenicasy-iorek
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