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Displaying 1-11 out of 11 total
Strategic Provider Selection in a Policy-Based Helping Scenario
Found in: E-Commerce Technology, IEEE International Conference on
By Christian Hütter, Jing Zhi Yue, Christian von der Weth, Klemens Böhm
Issue Date:November 2010
pp. 104-111
In service-oriented computing, software agents interact by requesting and providing services. Since providing a service incurs cost, uncooperative behavior dominates in the absence of an incentive mechanism. An economic model that describes interactions be...
 
Optimizing Multiple Centrality Computations for Reputation Systems
Found in: Social Network Analysis and Mining, International Conference on Advances in
By Christian von der Weth, Klemens Böhm, Christian Hütter
Issue Date:August 2010
pp. 160-167
In open environments, deciding if an individual is trustworthy, based on his past behavior, is fundamentally important. To accomplish this, centrality in a so-called feedback graph is often used as a trust measure. The nodes of this graph represent the ind...
 
Indirect Reciprocity in Policy-Based Helping Experiments
Found in: Web Services, European Conference on
By Christian von der Weth, Klemens Böhm, Thorben Burghardt, Christian Hütter, Jing Zhi Yue
Issue Date:November 2009
pp. 171-180
In service-oriented architectures, participants keep interacting by exchanging tasks, in order to increase their benefit. Since carrying out a task incurs costs, and participants often interact with unknown partners, uncooperative behavior dominates in the...
 
FAST: Friends Augmented Search Techniques - System Design & Data-Management Issues
Found in: Web Intelligence and Intelligent Agent Technology, IEEE/WIC/ACM International Conference on
By Christian von der Weth,Anwitaman Datta
Issue Date:August 2011
pp. 356-363
Improving web search solely based on algorithmic refinements has reached a plateau. The emerging generation of searching techniques tries to harness the ``wisdom of crowds'', using inputs from users in the spirit of Web 2.0. In this paper, we introduce a f...
 
Multiterm Keyword Search in NoSQL Systems
Found in: IEEE Internet Computing
By Christian von der Weth,Anwitaman Datta
Issue Date:January 2012
pp. 34-42
Distributed NoSQL systems aim to provide high availability for large volumes of data but lack the inherent support of complex queries often required by overlying applications. Common solutions based on inverted lists for single terms perform poorly in larg...
 
Finding Information through Integrated Ad-Hoc Socializing in the Virtual and Physical World
Found in: 2013 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT)
By Christian von der Weth,Manfred Hauswirth
Issue Date:November 2013
pp. 37-44
Despite the services of sophisticated search engines, there are interesting information sources which are useful but largely inaccessible to current web users. These sources are often ad-hoc, location-specific and only useful for users over short periods o...
 
DOBBS: Towards a Comprehensive Dataset to Study the Browsing Behavior of Online Users
Found in: 2013 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT)
By Christian von der Weth,Manfred Hauswirth
Issue Date:November 2013
pp. 51-56
The investigation of the browsing behavior of users has been a topic of active research since the Web started. However, new online services changed the meaning behind "browsing the Web" and require a fresh look at the problem. Platforms such as Y...
 
COBS: Realizing Decentralized Infrastructure for Collaborative Browsing and Search
Found in: Advanced Information Networking and Applications, International Conference on
By Christian von der Weth, Anwitaman Datta
Issue Date:March 2011
pp. 617-624
Finding relevant and reliable information on the web is a non-trivial task. While internet search engines do find correct web pages with respect to a set of keywords, they often cannot ensure the relevance or reliability of their content. An emerging trend...
 
COBS: A tool for collaborative browsing and search on the web
Found in: Multimedia and Expo, IEEE International Conference on
By Christian von der Weth, Anwitaman Datta, Sally Ang Nanyang
Issue Date:July 2010
pp. 272-273
User-generated content in the spirit of Web 2.0 is a promising means to improve the search for relevant information on the web, particularly multimedia content. The idea is that user col-laboratively search or browse for information, either directly by com...
 
Towards an Objective Assessment of Centrality Measures in Reputation Systems
Found in: E-Commerce Technology, IEEE International Conference on, and Enterprise Computing, E-Commerce, and E-Services, IEEE International Conference on
By Christian von der Weth, Klemens Bohm
Issue Date:July 2007
pp. 270-277
Reputation systems facilitate cooperation in open environments. Centrality-based reputation systems use centrality measures to rank individuals, i.e., compute their reputation based on feedback. However, despite the large number of such measures that have ...
 
Best Effort Query Processing in DHT-based P2P Systems
Found in: Data Engineering Workshops, 22nd International Conference on
By Philipp Rosch, Kai-Uwe Sattler, Christian von der Weth, Erik Buchmann
Issue Date:April 2005
pp. 1186
Structured P2P systems in the form of distributed hash tables (DHT) are a promising approach for building massively distributed data management platforms. However, for many applications the supported key lookup queries are not sufficient. Instead, techniqu...
 
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