By C. J. ‘Keith’ van Rijsbergen (auth.), David E. Losada, Juan M. Fernández-Luna (eds.)
Welcome to Santiago de Compostela! we're happy to host the twenty seventh Annual EuropeanConferenceonInformationRetrievalResearch(ECIR2005)onits?rst stopover at to Spain. those complaints comprise the refereed complete papers and poster abstracts p- sented at ECIR 2005. This convention used to be before everything validated through the Infor- tion Retrieval expert crew of the British machine Society (BCS-IRSG) below the identify “Annual Colloquium on info Retrieval learn. ” The colloquium used to be held within the uk every year till 1998, while the development was once equipped in Grenoble, France. given that then the convention venue has alternated among the uk and Continental Europe, re?ecting the becoming ecu orientation of ECIR. for a similar cause, in 2001 the development used to be renamed “European convention on details Retrieval learn. ” In - cent years, ECIR has persevered to develop and has turn into the main eu discussion board for the dialogue of analysis within the ?eld of data retrieval. ECIR 2005 was once held on the Technical university of Engineering of the collage of Santiago de Compostela, Spain. when it comes to submissions, ECIR 2005 used to be a record-breaking luck, considering 124 complete papers have been submitted in line with the decision for papers. This was once a pointy elevate from the a hundred and one submissions bought for ECIR 2003, which used to be the main profitable ECIR by way of submissions. ECIR 2005 demonstrated additionally a decision for posters, and forty-one posters the place submitted. Paper and poster submissions have been bought from throughout Europe and additional a?eld, together with North the US, South the US, Asia and Australia, that is a transparent indicationofthegrowingpopularityandreputationoftheconference.
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Additional info for Advances in Information Retrieval: 27th European Conference on IR Research, ECIR 2005, Santiago de Compostela, Spain, March 21-23, 2005. Proceedings
Different schemes were proposed to harvest this kind of locality. [2, 5] However, to the best of our knowledge, there is no study performed on real world trace to validate this speculation. In this section we describe an evaluation study performed on a recently collected Kazaa trace and focus on the interest-based locality exhibited in this dataset. We show that our observation is backed by a sound proof. BuddyNet: History-Based P2P Search 25 We use data collected in . The data collection process is as follows: A caching server is installed at the border between the local Kazaa user base of a large ISP and the Internet cloud.
User activity distribution Fig. 2. User interaction distribution Figure 1 shows the activity distribution of the peers. Y-axis shows the number of downloads for each user. On X axis, users are ordered in decreasing order of the number of downloads they initiate. Logarithmic scale is used on Y-axis. The activity levels for different users are widely varied. With few users issuing as many as 10,000 requests, about 90% of the users issuing less than 10 requests. Who 26 Y. Shao and R. Wang answers these queries?
We log the status of the buddy list to be used at the next checkpoint. When a node is removed from the buddy list, its index is also purged. After the first transfer of the index, nodes periodically exchange indexes in an incremental fashion. An incremental index transfer can also be triggered when a peer finds out that its copy of a buddy’s index is out-of-date by an incorrect response to its query or failed downloads. Transferring indexes among peers can be an expensive operation. If it happens often, it will increase system load and cause the system to perform badly.