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Title: People/Personal Homepages/S - Siefkes, Christian Computer science and philosophy student at the Technical University of Berlin. Personal details, activities, software, and links.
Kofutu_Spiritual_Healing_and_Personal_Growth Teaching a self-development system based on the use of symbols and meditation.

Looking_For_The_Light_in_The_Port_of_Indecision It is worthwhile to look at one's religious, ethical and moral beliefs once in a while to see where one is doing well and where one falls short. Questioning and reflection are an important part of Uni

IMAGe_Nation_Indigenous_Media_Arts_Group Nonprofit encouraging the promotion, development and dissemination of First Peoples media arts and culture.

FLAPA Provides information on relevant food laws, regulations, codes, and standards throughout Australia.

Island_squabble_goes_Google Canadians and Danes place online ads in debate over who controls a tiny Arctic island. (July 28, 2005)

Do_You_Know Describes the damage that George W. Bush has allegedly brought upon the United States and the world, and provides an early warning system of what he plans for his second term.

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Christian SiefkesChristian SiefkesHomeFree SoftwaretrainspamfilterMoonfilterNL StegoFree SocietySpam FilteringInformation ExtractionHistory of ComputingContact

Christian Siefkes

Welcome to my home page!I am a computer scientist and an author. Currently, I'm working as afreelance software engineer and specialist for text mining and statisticalalgorithms in Berlin, Germany. I hold a Ph.D. in computer science from theFreie Universität Berlin.

Books

From Exchange to ContributionsBeitragen statt tauschenAn Incrementally Trainable Statistical Approach to InformationExtractionFrom Exchange to ContributionsEdition C.Siefkes, Berlin, 2007.Peer production – the way in which free softwareprojects such as GNU/Linux and free content projects such as the Wikipedia areproduced – has revolutionized the areas of software and content productionduring the last decades. But does peer production only work for informationgoods, or can it have a similar effect on the production of physical goods?I have written a book discussing this question, and showing how peerproduction can indeed grow beyond the sphere of information. A society basedentirely on peer production is possible, and this book describeshow.Beitragen statt tauschenAG SPAK Bücher,Neu-Ulm, 2008.Die deutsche Übersetzung meines Buchs From Exchange toContributions: das Buch beschäftigt sich dem Potenzial der Peer-Produktion– der Art und Weise wie Freie Software und Freie Inhalte produziert werden.Wir wissen, dass diese neue Produktionsweise von großer Bedeutung ist, wenn esum Software und Inhalte geht – Erfolgsgeschichten wie die von GNU/Linux,Apache oder der Wikipedia sprechen hier eine deutliche Sprache. Aber mein Buchzeigt, dass das noch längst nicht alles ist: Peer-Produktion hat das Potenzialfür mehr, bis hin zu einer Umwälzung der gesamten gesellschaftlichenProduktion.An Incrementally Trainable Statistical Approach to InformationExtractionVDM Verlag, Saarbrücken, 2008.My Ph.D. thesis, finished in 2007:The purpose of Information Extraction (IE) is to find desired pieces ofinformation in unstructured or weakly structured texts and store them in aform that is suitable for automatic querying and processing. This bookpresents a innovative approach to statistical information extraction. Itintroduces a new algorithm which supports functionality not available inprevious IE systems, such as interactive incremental training to reduce thehuman training effort.The system also utilizes new sources of information, employing rich tree-basedcontext representations to combine document structure (HTML or XML markup)with linguistic and semantic information. The resulting IE system is designedas a generic framework for statistical information extraction.

What You'll Find on My Site

Free SoftwareI have contributed to various freesoftware projects, and have also written a few (mostly small) programs ofmy own. On this page you can also find a list of my translations for the GNUProject and an overview of my experiences in commercial softwaredevelopment.Free SocietyI'm involved in a blog and wiki discussingwhether and how the practices of free software and open content developmentcan be extended to other areas of production, and whether an economy basedon this mode of production is possible. My research on these questions haslead to a book which is available in English and German. Additionally, thispage lists older texts which I wrote as a student, and more.Spam FilteringSpam is ubiquitous, highly adapting to anycounter-measures, and most annoying. This makes spam filtering one of the mostimportant and interesting research topics in the field of text classificationand text mining. Here you'll find my contributions to this effort.Information ExtractionThis page is dedicated to my Ph.D. project. Theprimary goal of my Ph.D. research was to develop and evaluate a statisticalsystem for the extraction of information from natural language texts thatsupports incremental training and that takes the structure of texts intoaccount. My Ph.D. thesis, publications, and software are all available here.History of ComputingAs a student I worked for anexperimental teaching project with the purpose of giving computer sciencestudents a better insight into how to write good papers and to conduct largerresearch activities. As the topic area of the project we had chosen historicaldevelopments in the fields of computer science and software development; bothto open up an interesting field of exploration that is largely outside thescope of usual CS teachings and to provide the students with a betterunderstanding of the history of their own field.ContactHow to get in touch with me.

Keimform Articles

I'm a co-author in the German-language Keimform-Blog, a group weblog discussingwhether and in which ways commons-basedpeer production has a potential that extends beyond the areas of freesoftware and open content production where it has first emerged. Here you canpreview my most recent contributions and the latest articles published in theblog by any author.My Most RecentArticlesAntenneTux mit Interview aus HiddinghausenChristian Siefkes, 25 Sep 2008Heute (25.9.) um 18:05 wird die fünfzehnte AntenneTux-Sendung ausgestrahlt. Unter anderem enthält die Sendung ein Interview, das Peter Bußfeld und sein Team mit mir in Hiddinghausen geführt haben. Thema war diesmal allerdings nicht die Peer-Ökonomie (denn um die ging es ja bereits ausführlich in der dreizehnten Sendung). Stattdessen drehte sich das kurze Gespräch darum, was [...]Hiddinghausen talks, part 3: Pooling effort where free sharing failsChristian Siefkes, 14 Sep 2008My last talk in Hiddinghausen was a little talk given as a complement to the Commons Network idea. The Commons Network is based on the idea of free and unconditional sharing—that others share with you goods they have or produce because they like to do so (and the other way around). This leaves, inevitable, the [...]Hiddinghausen talks, part 2: A network for sharing and shared productionChristian Siefkes, 08 Sep 2008Free design is an important building block for spreading peer production, but it is not enough. A second topic discussed in Hiddinghausen was therefore how to facilitate and encourage the sharing and the shared production of physical goods and of services in all areas of life. My proposal here is called the Commons Network.The Commons [...]Hiddinghausen talks, part 1: An integrated collection of free designChristian Siefkes, 04 Sep 2008As announced in the German part of this blog, a weekend workshop on peer production and the peer economy took place during the last weekend (29-31 August) in the nice little town of Hiddinghausen in the German Ruhr Area. A detailed three-part report on the workshop, which was a fully self-organized event with about 30 [...]Einladung zum Peer-Ökonomie-Wochenende in HiddinghausenChristian Siefkes, 15 Jul 2008In Uli Franks wunderschönem (und als Veranstaltungsort beliebtem) Haus in Hiddinghausen wird es Ende August ein langes Diskussionswochenende zur Peer-Ökonomie geben. Hier der Ankündigungstext, großteils geschrieben von Uli Frank:„So geht das nicht weiter!“ oder: „Das ganze System wird zusammenbrechen!“ kann man inzwischen häufig hören. Unter Kritikern gibt es schon die Wette, ob das „System“ eher [...]Dieses Wochenende: Linke Buchtage in BerlinChristian Siefkes, 04 Jul 2008Heute Abend beginnen im Berliner Mehringhof (Gneisenaustr. 2a) die Linken Buchtage 2008. Zweieinhalb Tage lang (Freitag 17-21, Samstag 11-21, Sonntag 11-17 Uhr) stellen 30 linke Verlage sich und ihr Programm vor.Der Verlag AG SPAK Bücher – und damit mein Buch – wird auch vertreten sein, auf dem Gemeinschaftsstand von aLiVe, der Assoziation Linker Verlage.Es gibt [...]Newest Blog ArticlesIst die Finanzmarktkrise eine Krise der Vermittler?benni, 12 Oct 2008Das Internet bringt jede Menge Krisen hervor, meist sind es Krisen der Vermittler. Viele von ihnen werden überflüssig oder müssen sich zumindestens massiv neue Geschäftsmodelle suchen. Die Musikindustrie ist das beliebteste Beispiel. Das Grundmuster ist immer das selbe: Das Internet bringt Anbieter und Abnehmer direkt ins Geschäft, deswegen werden die Vermittler nicht mehr benötigt.Nun ist [...]15.000 bis 100.000 auf der StraßeStefanMz, 11 Oct 2008Ok, es liegt zwar keine 10er-Potenz zwischen der Schätzung der Polizei und der der Veranstalter, aber fast. Ts. Also ziehen wir mal die Zuschauer_innen ab und gehen dann rund von 50.000 Menschen aus, die gegen den Überwachungswahn demonstriert haben — dann waren das immer doch richtig viele! Und das bei so einem Langweilerthema wie »Datenschutz«. [...]Open Source Banking?benni, 10 Oct 2008In den letzten Tagen dachte ich immer mal wieder, eigentlich müsste doch in dieser Krise diejenige Bank als Gewinner hervorgehen, die möglichst transparent mit ihren Geschäften umgeht, weil so offen liegt wo ihr Geld herkommt und wo es hingeht und damit die Risiken einschätzbarer wären. Das wäre in der aktuellen Vertrauenskrise das stärkste Kapital. Tatsächlich [...]Weltzeituhr um zweiStefanMz, 10 Oct 2008Morgen, am Samstag, um 14:00 Uhr, beginnt die große Feier zur Beerdigung des Kapitalismus Demo gegen den Überwachungswahn. Freundinnen und Freunde des Neuen im Alten treffen sich — gewiss, etwas phantasielos — um 14:00 Uhr an der Weltzeituhr. Wir werden nebenstehendes Transparent dabei haben, sollten also nicht zu verfehlen sein. Wir können ja dann schon [...]Community Building in Zeiten der galoppierenden Krisebenni, 08 Oct 2008Stefan hat mich gerade dankenswerterweise durch sein letztes Posting wieder auf eine ältere Diskussion gestoßen. Ich hab dadurch meine alten Hoffnungen wieder entdeckt, die ich eigentlich mit Hiddinghausen verbunden hatte. Diese Diskussion wollte ich da eigentlich weiter führen aber dazu kam es dort nicht so recht. Ich glaube auch, dass das kein Zufall ist. Dort [...]Why Peer Production Is Better Than CapitalismStefanMz, 08 Oct 2008An interview with Michel Bauwens, founder of the Peer-to-Peer Foundation:Read the transcript of the interview here: P2P as a post-capitalist mode of productionFind more interview snippets with Michel at Peer To Peer: Social, Political, And Economic Issues In A P2P World[Last generated: 2008-10-14]Valid XHTML 1.0 Transitional
 

Computer

science

and

philosophy

student

at

the

Technical

University

of

Berlin.

Personal

details,

activities,

software,

and

links.

http://www.siefkes.net/

Siefkes, Christian 2008 October

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Computer science and philosophy student at the Technical University of Berlin. Personal details, activities, software, and links.

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