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SEE ALSO:

CALL FOR TUTORIAL PROPOSALS (NEW):
http://recsys.acm.org/2011/tutorials.shtml

CALL FOR DEMOS (NEW):
http://recsys.acm.org/2011/demos.shtml
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We are pleased to invite you once again to participate in the premier annual event on research and 
applications of recommendation technologies, the Fifth ACM Conference on Recommender Systems. The 
previous conferences have been distinguished by a strong level of interaction between practitioners
and researchers in the sharing of ideas, problems and solutions, and the 2011 conference will 
continue in this tradition. The fully-refereed proceedings will be published by the ACM and, like 
past RecSys proceedings, are expected to be widely read and cited.

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TOPICS OF INTEREST
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We construe recommender systems broadly, including applications ranging from e-commerce to social 
networking, platforms from web to mobile and beyond, and a wide variety of technologies ranging 
from collaborative filtering to case-based reasoning. Therefore, topics of interest for RecSys 2011
include (but are not limited to):

* Case studies of recommender system implementations
* Computational advertising
* Conversational recommender systems
* Context-aware and multidimensional recommender systems
* Evaluation of recommender systems
* Group recommenders
* Impact of recommenders in practice
* Innovative recommender applications
* Machine learning and recommender systems
* Novel paradigms of recommender systems
* Personalization
* Preference elicitation
* Recommendation algorithms
* Recommendation in social networks
* Recommender system interfaces
* Scalability of recommendation techniques
* Security, privacy, trust, and robustness
* Semantic web technologies for recommender systems
* Theoretical aspects of recommender systems
* User modeling and recommender systems
* User studies

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IMPORTANT DATES
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Deadline for abstracts (mandatory for long/short papers): May 9, 11.59 pm (PST) Paper submission 
deadline: May 16, 11.59 pm (PST) Paper Acceptance Notifications: July 15 Camera-ready copy: August 7

Please see the conference website (http://recsys.acm.org/2011/) for additional important dates for 
submitting workshop papers and doctoral symposium applications. The list of accepted RecSys 
workshops will be available soon.

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PAPER FORMAT & SUBMISSION
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All submissions and reviews will be handled electronically in PDF format. RecSys 2011 submissions 
should be prepared according to the standard ACM SIG proceedings format. For your convenience, we 
provide paper templates in Microsoft Word and LaTeX on the conference website.
More details on the submission procedure are available at the conference website 
http://recsys.acm.org/2011/

There are two paper submission categories (UPDATED):

- LONG PAPER submissions should report on substantial contributions of lasting value. The maximum 
length is 8 pages in the standard ACM SIG proceedings format. Each accepted long paper will be 
presented either in a plenary session or a poster session:

	* Plenary presentation: As in past RecSys conferences, the best-reviewed long papers will be presented as part of the plenary
	sessions of the conference.
	* Poster presentation: To accommodate the growing number of quality long paper submissions over the years, a number of
	  additional long papers may be accepted (including the full-length paper in the proceedings), and will be presented as part of the poster session.

- SHORT PAPER submissions typically discuss exciting new work that is not yet mature enough for a 
long paper. The maximum length is 4 pages in the standard ACM SIG proceedings format. Each accepted
short paper will be presented in a poster/demo session. The presentation may include a system 
demonstration.

NOTE. Please note that rejected long paper submissions will not be automatically considered as 
short papers.


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LOCATION & ACCOMMODATION
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The 5th ACM International Conference on Recommender Systems will be held in The Palmer House Hilton hotel.

The Palmer House Hilton
17 East Monroe Street
Chicago, Illinois
USA 60603
Tel: +1-312-726-7500
Fax: +1-312-917-1707

A block of rooms has been reserved at The Palmer House Hilton hotel for October 22, 2011 - October 27, 2011.
Special room rates for RecSys 2011:
2 DOUBLE BEDS rates from 249.00 USD/Night
1 KING BED rates from 249.00 USD/Night

Online reservations can be made here:
http://bit.ly/g9dIVQ

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RECSYS 2011 CHAIRS
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Bamshad Mobasher, General Chair,
DePaul University, USA

Robin Burke, General Chair,
DePaul University, USA

Dietmar Jannach, Program Chair,
TU Dortmund, Germany

Gediminas Adomavicius, Program Chair,
University of Minnesota, USA

--
Zeno Gantner
Machine Learning Lab
University of Hildesheim
Tel. +49 5121 / 883 856
http://www.ismll.uni-hildesheim.de/

MyMediaLite Recommender System Library: http://ismll.de/mymedialite