... hab' ich mitzuteilen - L's blog

... with a touch of python - Didaktik der Informatik, Informatische Bildung, ...
Fri, 09 Nov 2007
Studie: Massenhafter RFID-Einsatz könnte Recycling verschlechtern [ 17:02 Uhr ] [ 113 Worte ]

Die Studie sei allen empfohlen, die auch die Seite der Wiederverwertung ausgemusterter RFIDs interessieren.
Studie auf das eigene System kopieren (PDF-Datei)
Zusammenfassung laut Heise:

Damit die RFID-Technik wirklich massentauglich werde, empfiehlt es, so weit wie möglich bevorzugt Aluminium als Antennenmaterial einzusetzen, Transponder, wo immer möglich, mehrfach zu verwenden und die Entwicklung einfach getrennt sammelbarer Tags zu intensivieren.
2007-11-09T08:56:34+01:00
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Snake Wrangling for Kids [ 15:58 Uhr ] [ 117 Worte ]

Ob's was taugt, vermag ich noch nicht zu sagen ...

Jason R Briggs: Snake Wrangling for Kids [''Snake Wrangling for Kids' is a printable electronic book, for children 8 years and older, who would like to learn computer programming. It covers the very basics of programming, and uses the Python programming language to teach the concepts. Examples are presented for Window, Mac OSX and Linux.']
Thu, 08 Nov 2007 22:28:00 -0000
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Thu, 08 Nov 2007
IES Practice Guide for Encouraging Girls in Math and Science [ 21:18 Uhr ] [ 611 Worte ]

Lang und lesenswert ...

This past September the National Center for Education Research released a practice guide with five recommended strategies for encouraging girls in Math and Science. The report is research-based and includes a number of interesting facts from recent educational researchers as well as recommended strategies that can be easily applied in classrooms.
The practice guide states that 'To encourage girls in math and science, we need to begin first with their beliefs about their abilities in these areas, second with sparking and maintaining greater interest in these topics, and finally with building associated skills.' (pg. 8) The recommendations put forward by the practice guide are:
  • Teach students that academic abilities are expandable and improvable. This addresses the belief that some students have that knowledge is fixed at birth (the idea that a student does well more because of 'smarts' than due to hard work).
  • Provide prescriptive, informational feedback. Feedback that focuses on positive work ethic, good application of strategies, and problem solving techniques vs. just stating that students did a 'good job' decreases their belief that knowledge is fixed and also encourages them to have better self-efficacy with regards to the subject.
  • Expose girls and young women to female role models who have succeeded in math and science.
  • Create a classroom environment that sparks initial curiosity and fosters long term interest in math and science. Using project based learning and activities that allow students to frame problems within their own interests can help them understand how math and science (as well as computing skills) can have broad applications.
  • Provide spatial skills training. Research suggests that students do not always have the knowledge about what spatial strategies are available to them in order to solve a problem. In computer science we often draw diagrams to represent concepts or ideas. Making the methods behind the construction of the diagrams and the reasons for the diagrams explicit can help students make better choices about problem solving strategies.
One of the most interesting recommendations to me, and probably the easiest to implement in the classroom is the idea of prescriptive, informational feedback. 'Experimental work suggests that feedback given in the form of praise focused on global intelligence (e.g., 'you are smart') may have a negative impact on future learning behavior in comparison to praise about effort (e.g., 'you must have worked hard').'
I cannot count the number of times I have just said to students, 'you are smart enough to do this' or 'see, that was easy' rather than acknowledging the effort and work that they put into the project. Comments such as 'I believe you can do this, you work hard enough' and 'that wasn't too much work' (as opposed to easy) are now going to become part of my classroom praise for students.
If you get the chance I would highly recommend reading the practice guide. It is written for classroom teachers and does an excellent job of making recommendations you can use in your classes today. Even if you don't get the chance to read the guide, please share with us what you believe to be the most interesting idea from above or even something you might do in your classroom that aligns with the IES suggestions. Leigh Ann Sudol
CSTA Communications Committee Chair

[ Datum/Zeit: ] Tue, 06 Nov 2007 13:54:03 -0500
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Wed, 07 Nov 2007
CTAN has new packages: dot2texi and dot2tex [ 19:58 Uhr ] [ 271 Worte ]

The packages below have just been put in at tug.ctan.org 
and should soon be at your favorite mirror. 
Thank you again, Jim Hefferon Saint Michael's College 
......................................................................... 
The following information was provided by our fellow contributor: 
Name of contributions: dot2texi dot2tex
Author's name: Kjell Magne Fauske 
Location on CTAN: /macros/latex/contrib/dot2texi  /graphics/dot2tex/ 
Summary description: Convert graphs generated by Graphviz to LaTeX 
                     friendly formats
Summary description: Create graphs within LaTeX using the dot2tex tool 
License type: dfsg and gpl 
Announcement texts: 
---------------------------------------------------------------------- 
Dot2tex is a tool for converting graphs rendered by Graphviz to 
formats that can be used with LaTeX. The purpose of dot2tex is to 
give graphs generated by Graphviz a more LaTeX friendly look and feel. 
This is accomplished by converting xdot output from Graphviz to a 
series of TikZ and PGF, or PSTricks commands.

The dot2texi package allows you to embed graphs in the DOT graph 
description language in your LaTeX documents. The dot2tex[1] tool 
is used to invoke Graphviz[2] for graph layout, and to transform 
the output from Graphviz to LaTeX code. 
The generated code relies on the TikZ and PGF package or the 
PSTricks package. 
The process is automated if shell escape is enabled. 
[1] http://www.fauskes.net/code/dot2tex/
or in graphics
...
2007-11-07T14:12:23

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Tue, 06 Nov 2007
Ab 2008 nach Hause telephonieren mit Android von Google? [ 23:43 Uhr ] [ 93 Worte ]

So wird eine weitere Plattform für mobiles Programmieren eröffnet.

Google präsentiert Pläne für Handy-OS: Das Google-System für Mobiltelephone hört auf den Codenamen »Android« und soll mit Partnern wie der Deutschen Telekom, HTC und Motorola auf den Markt gebracht werden. Die Betriebssystem-Komponente baut auf dem Linux-Kernel auf.
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Mon, 05 Nov 2007
Überwacht die Überwacher! [ 22:17 Uhr ] [ 96 Worte ]

Die Aktion Überwach! wehrt sich auf originelle Weise gegen den Überwachungsstaat: Auf der Webseite wird nämlich genau aufgelistet, welche Bundes- und Landesministerien, welche Regierungs- und Oppositionsparteien welche Netzseite besucht haben. Natürlich nur Netzseiten und Blogs, die sich an dieser Aktion beteiligen. Und mitmachen kann dort jeder. [Telepolis News]
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Sun, 04 Nov 2007
sis-Dateien inspizieren und mit Python extrahieren [ 10:43 Uhr ] [ 162 Worte ]

S60-Installationsdateien mit dem Pythonskript sisinfo.py untersuchen

Jari Sukanen stellt mit sisinfo ein Python-Skript bereit, mit dem Installationsdateien für Mobiltelefone (bei uns Symbian S60) untersucht und ausgepackt werden können.

Da es ein Kommandozeilenwerkzeug ist, wird die Parametrisierung angegeben:

sisinfo.py [options]

-f FILENAME, --file=FILENAME
 Name of the SIS file to inspect
-i, --info Print information about SIS contents
-s, --structure
 Print SIS file structure
-e PATH, --extract=PATH
 Extract the files from the SIS file to PATH
-c, --certificate
 Print certificate information

Zur Ausgabe der Zertifizierungsdaten muss PyASN1 installiert werden. Die anderen Funktionen werden allerdings nicht beeinträchtigt, wenn diese Erweiterung nicht installiert ist.

Fri, 02 Nov 2007

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