Here is one of my attempts of creating aesthetically pleasing network graph:
<produced with Gephi>
Blogs
Crowd Accelerated Innovation
Submitted by Neil Rubens on Tue, 10/05/2010 - 18:44TED's Chris Anderson says the rise of web video is driving a worldwide phenomenon he calls Crowd Accelerated Innovation -- a self-fueling cycle of learning that could be as significant as the invention of print. But to tap into its power, organizations will need to embrace radical openness. And for TED, it means the dawn of a whole new chapter ...
Personal Learning Environment (PLE) / Social Learning
Submitted by Neil Rubens on Wed, 09/29/2010 - 12:16The concepts of Personal Learning Environment and Social Learning; while seemingly opposite; do appear to be different sides of the same coin so to say; i.e. without resources provided by social learning, personal learning would not be possible; and artifacts produced by personal learning are in turn contributed to social learning resources.
"Personal Learning Environments are systems that help learners take control of and manage their own learning. This includes providing support for learners to • set their own learning goals • manage their learning; managing both content and process • communicate with others in the process of learning and thereby achieve learning goals. wiki
Connectivism (learning theory)
Submitted by Neil Rubens on Wed, 09/29/2010 - 11:54When I present my work on applying network analysis to e-Learning; a common criticism is that my work does not have pedagogical foundation; and hence not really valid for 'real' education. Well, no more. After some midnight surfing, I have come across the concept of Connectivism (learning theory):
One aspect of connectivism is the use of a network with nodes and connections as a central metaphor for learning. [2] In this metaphor, a node is anything that can be connected to another node within a network such as an organisation: information, data, feelings, images. Learning is the process of creating connections and developing a network. http://en.wikipedia.org/wiki/Connectivism_%28learning_theory%29
My only wish is that I would have found out about Connectivism earlier. By the way we are working on application, that will make finding related concepts easier.
Here are some nice resources on the topic that I have come across:
http://en.wikipedia.org/wiki/Connectivism_%28learning_theory%29
"The knowledge is the network", Tenenbaum
Keywords: eLearning, e-Learning, network analysis, network mining, social network services, connectivism
Data Mining / Machine Learning Tools & Suites
Submitted by Neil Rubens on Tue, 09/28/2010 - 18:09Here are some of my favourite tools:
RapidMiner
KNIME
Pentaho
KDnuggets Software Lists provides a comprehensive list.
arXiv: Submitting pdf (TeX generated) without the LaTex source code
Submitted by Neil Rubens on Wed, 04/21/2010 - 18:42BOTH WORKAROUNDS NO LONGER WORK. KEPT FOR REFERENCE PURPOSES ONLY.
I love the openness of arXiv system. That said, their submission policies are nothing short of being dictorial:
(if your pdf was produced for tex; you must submit the source code along with all of the files)
(what worse it must compile on the arXiv system, so you have to include all of the style files etc -- a lot of work)
! If your submission is (La)TeX, then you must submit the source (plus necessary macros and figures), not derivative dvi, Postscript, or PDF (see Why TeX?). For more information on formats and other submission details see Submission Help.
your.pdf appears to have been produced by TeX. This file has been rejected as part of a submission. It appears to be pdf generated from TeX/LaTeX source. For the reasons outlined at: http://arXiv.org/help/faq/whytex we insist on submission of the TeX source rather than the processed version. Our software includes an automatic TeX processing script that will produce PDF, PostScript and dvi from your TeX source. If our determination that your submission is TeX produced is incorrect, you should send e-mail with your submission number to www-admin@arXiv.org. Correct processing errors by returning to the Add Files page to add, delete, or replace files within your submissions. If you are unable to correct the processing errors yourself and need to contact arXiv administrators be sure to quote the submission identifier submit/zzz. Administrators may take a day or two to respond to requests for help.
I have produced my pdf with a great editor LyX; but due to some error with graphics conversion, was not able to export it properly to LaTeX. arXiv would not let me submit the pdf, by giving me the above errors.
Mostly it was complaining that since it was produced by TeX, I have to submit the source code with all the necessary files. I understand that having latex source code would make parsing the text easier etc., but if I could not produce the appropriate LaTex file (that must compile on the arXiv's system), the current system does not allow me to submit in any way.
The easiest way to take care of that is:
Simply rename the file and remove the pdf extension e.g. my.pdf -> my Note: arxiv is smart enough to recognize that the file is of PDF type, but it does not bother anymore about submitting the source files.
Another option:
I tried several pdf metadata editors to change the creator field of the pdf; but that did not seem to fool the arXiv. Luckily, it is possible to create a pdf from word and then simply insert pages from your article, and delete the word's page -- and that is exactly what I have done. I have included a 1 page pdf produced by word in case somebody else runs into the same problem (here it is).
keywords:
arxiv, continue process files
arxiv This file has been rejected as part of a submission. It appears to be pdf generated from TeX/LaTeX without source\
ubuntu change pdf metadata
ubuntu change pdf metadata
edit PDF meta-data - Ubuntu Forums
Changing PDF Metadata on Ubuntu
List of PDF Editing tools for Ubuntu
pdftk
edit pdf metadata
Edit PDF Properties
BeCyPDFMetaEdit
change pdf metadata application tex
change pdf creator metadata
arxiv submit pdf without tex latex sourcecode
arxiv submit pdf without tex
Complex SQL Joins
Submitted by Neil Rubens on Wed, 04/21/2010 - 14:13SQL joins tend to become very complex (and not very readable) as the number of tables involved becomes large. An alternative is to select into a temporary table and then use that data in the joins.
CREATE TEMPORARY TABLE can_offices SELECT * FROM company.offices o WHERE o.country_code='CAN';
You can then use the temp table to do joins etc.
SELECT * from company c, offices o WHERE c.company_ID = o.company_ID
keywords:
mysql export resultset as table
mysql import resultset as table
mysql export resultset as variable
sql
sql in
sql select where in
sql join
query designer
subselect sub select
ValueError: Extra data: line 218 column 34 - line 2703926 column 7 (char 8354 - 87303975)
Submitted by Neil Rubens on Sun, 01/17/2010 - 13:38
ValueError: Extra data: line 218 column 34 - line 2703926 column 7 (char 8354 - 87303975)
The cause is missformation of json file
before {...},{..},...
should be [{...},{..},...]
bad u'\u2019' character in python: UnicodeEncodeError: 'latin-1' codec can't encode character u'\u2019' in position : ordinal
Submitted by Neil Rubens on Sat, 01/16/2010 - 18:13Sollution:
if val != None and type(val) == type(u"") and val.find(u'\u2019') >= 0 : val = val.replace(u'\u2019', '\'')
Keywords
mysql UnicodeEncodeError: 'latin-1' codec can't encode character u'\u2019'
\u2019
MySQL Python on Snow Leopard
Submitted by Neil Rubens on Fri, 01/15/2010 - 19:15First of all you may try a precompiled binary egg in the attachment.
If it does not work you may need to follow these steps:
Keywords error: unrecognized command line option "-Wno-long-double" error: command 'gcc' failed with exit status
Edit your:
/Library/Frameworks/Python.framework/Versions/5.1.1/lib/python2.5/config/Makefile
And remove "-Wno-long-double" from BASECFLAGS
e.g.: BASECFLAGS= -fno-strict-aliasing -no-cpp-precomp -mno-fused-madd -fno-common -dynamic
(suggested by http://osdir.com/ml/python.f2py.user/2005-10/msg00002.html)
Then as suggested by http://blog.some-abstract-type.com/2009/09/mysql-python-and-mac-os-x-106-snow.html
shell> PATH="/usr/local/mysql/bin:$PATH"
shell> tar xzf MySQL-python-1.2.3c1.tar.gz
shell> cd MySQL-python-1.2.3c1
shell> ARCHFLAGS="-arch x86_64" /usr/bin/python setup.py build
shell> /usr/bin/python setup.py install
----------------
Keywords:
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