August 19, 2014
A new version of SocNetV, the cross-platform tool for social network analysis and visualization, has been released. Version 1.2 brings a major GUI overhaul, a new conceptualization of “prominence” measures, new importance and reachability measures, many new visualization layouts based on the new indices, and fixes a slew of bugs (see below). (more…)
July 18, 2014
Here’s a series of 31 images taken with a Dino-Lite digital microscope. I won’t go in details about the original source of the images, since most of them are pretty obvious (i guess).
Some of them are of poor quality, due to trembling hand or low resolution of Kamoso (KDE’s picture retriever). Anyway, have fun…
July 10, 2014
What is Varnish?
Varnish Cache or just Varnish is an open-source HTTP accelerator and caching reverse proxy for web servers, like Apache or nginx, hosting content-heavy dynamic web sites. In non-geek speak, Varnish is an free program which runs in front of your web server (which in this context is called backend or origin) and stores (caches) a copy of each webpage served by the web server. When a user requests a cached page, Varnish steps in and serves the cached copy instead of requesting the same page again and again from the backend server. So Varnish is ideal for developers who run high traffic sites with lots of visitors and like their web application to be highly available and running fast. This how-to is an attempt to present a comprehensive but simple introductory guide to Varnish configuration for web developers who want to scale their projects gracefully. (more…)
May 14, 2014
Τι συμβαίνει όταν η linuxάδικη ομάδα ενός επιτυχημένου ειδησεογραφικού site συνεργάζεται με γνωστούς και πετυχημένους αθλητικούς δημοσιογράφους; Μπορεί να γεννηθεί ένα νέο, μοντέρνο και ανεξάρτητο αθλητικό site: το coppa.gr.
Στημένο σε Drupal, το coppa.gr είναι “100% powered by Linux” και ανοικτό κώδικα: από τα desktops των συντακτών που τρέχουν Kubuntu και το pfSense firewall μέχρι τον Debian server με Apache, MySQL κλπ. Εντυπωσιακό, νομίζω, γρήγορο και καλαίσθητο, το COPPA φιλοδοξεί να μεταδίδει καθημερινά, έγκαιρα και έγκυρα, αθλητικα νέα από όλα τα σπορ, χωρίς κασκόλ και εξαρτήσεις. Άλλωστε, το περιεχόμενο «υπογράφουν» άνθρωποι που γνωρίζουν το αντικείμενο καλύτερα από τον καθένα: Σωτηρακόπουλος, Σπυρόπουλος, Βέργης, Θειακός, Σωτηρίου, Χριστοφοράκης, Λοθάνο, Τσούτσος, Θαναηλάκης κα.
Τεχνικά, η υλοποίηση έγινε με D7, Zen, megamenu, views, rules, media, ckeditor και τα υπόλοιπα γνωστά modules της κοινότητας του Drupal, την οποία χιλιοευχαριστούμε.
Στιγμιότυπο από το coppa.gr
March 27, 2014
If you’re interested in Social Networks Analysis and Visualization (I’m not talking about FB/Twitter here!), check out our latest and greatest release of SocNetV, version 1.0.
SocNetV (Social Networks Visualizer) is now based on Qt5/C++ framework and has new great features, such as PageRank network analysis and, of course, layouts. At the moment, there is only source code and Fedora/openSUSE packages available from our project page in SourceForge. Soon, Debian/Ubuntu packages will be released as well. Warning: There are SocNetV packages in the official Debian/Ubuntu repositories, but it’s a very old version. Maybe a brave debian developer (serzan?) could fix this soon
Needless to say: SocNetV is a GPL3 application. It is free software (free as in freedom). You can copy it, modify it and redistribute it as long as any derivative work remains free software. Enjoy.
February 12, 2014
A great song, an astonishing live performance (on par with, say, Pink Floyd’s “Comfortably Numb”), something you ought to experience live. Just watch these guys playing, hear Morello’s guitar solo. Read through the lyrics, too. Or better read John Steinbeck novel, “The Grapes Of Wrath”.
January 8, 2014
“Children of Men” is a 2006 sci-fi drama by Alfonso Cuarón, with Julianne Moore, Clive Owen, Chiwetel Ejiofor and Michael Caine. It depicts a dystopian and racist England in 2027, where the whole mankind is about to extinct because women have suddenly and without any reason become infertile. Chaos rules outside UK. The borders are closed and illegal immigrants are being persecuted and exterminated. “Ordinary and legal ” people live inside a police state in a don’t ask, don’t tell basis. We watch one of these “ordinary” people, a cynical, former activist who agrees to help some “terrorists” to transport a miraculously pregnant black woman to a ship called “Tomorrow”… I enjoyed this movie for three reasons:
1) the astonishing scenario and superb cinematography. For instance, the art archive scene is brilliant. Cuarón has even added a flying pig balloon as a clear homage to Pink Floyd’s Animals.
2) the acting of Michael Caine as a retired hippie and
3) the “world gone astray” and depressing in many places scenes the movies depicts. Dystopian yes, but aren’t we gradually getting there ?
Watch the trailer and grab the DVD. IMHO, one of the best movies ever.