Building and operating large-scale information retrieval systems used by hundreds of millions of people around the world provides a number of interesting challenges. Designing such systems requires making complex design tradeoffs in a number of dimensions, including (a) the number of user queries that must be handled per second and the response latency to these requests, (b) the number and size of various corpora that are searched, (c) the latency and frequency with which documents are updated or added to the corpora, and (d) the quality and cost of the ranking algorithms that are used for retrieval. In this talk I'll discuss the evolution of Google's hardware infrastructure and information retrieval systems and some of the design challenges that arise from ever-increasing demands in all of these dimensions. I'll also describe how we use various pieces of distributed systems infrastructure when building these retrieval systems. Finally, I'll describe some future challenges and open research problems in this area.
1st Part: "Prof. Bruns, Prof. Burguess & Dr. Woodford: Mapping Online Publics: New Methods for Twitter Research"
2nd Part: "Robert Jäschke: Identifying and Analyzing Researchers on Twitter"
Earlier this week the UK Conservative party promised to offer a £1m cash prize to a person or team that creates an online platform that can be used to solve “common problems”. The prize – which the party says will
ZXing (pronounced "zebra crossing") is an open-source, multi-format 1D/2D barcode image processing library implemented in Java. Our focus is on using the built-in camera on mobile phones to photograph and decode barcodes on the device, without communicating with a server. We currently have production-quality support for:
Das ZVAB - Zentrales Verzeichnis Antiquarischer Bücher - ist weltweit das größte Online-Antiquariat für deutschsprachige Titel. Über 3700 professionelle Antiquare aus 21 Ländern bieten auf zvab.com Millionen antiquarische oder vergriffene Bücher in vielen Sprachen sowie Noten, Graphiken, Autographen und Postkarten zum Kauf an.
Cocktails ganz einfach aus der eigenen Hausbar zaubern. Jede Menge Cocktailrezepte und eine nette Cocktail-Community mit einem eigenen Forum finden sie bei Cocktailscout.de
This is a reference card for zsh. It was created based on version 3.1.9 so is a little out-of-date. It is seven pages long, even with three columns per page, so you will need a very big piece of card to stick it to.
Alf Eaton stellt in HubLog ein Skript vor, daß er für Google Texte & Tabellen (kurz Google Docs) geschrieben hat. Nach Installation des Skripts innerhalb der Google-Dienste durchsucht es auf Anforderung ein Dokument nach DOIs, ermittelt anhand dieser DOIs gleichförmig aufgebaute, gut lesbare Quellenangaben, erstellt aus diesen Quellenangaben eine Bibliographie im Anhang des Dokuments, und…
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