Results 1 - 10 of 524

UCSF Chimera—a visualization system for exploratory research and analysis

by Eric F. Pettersen, Thomas D. Goddard, Conrad C. Huang, Gregory S. Couch, Daniel M. Greenblatt, Elaine C. Meng, Thomas E. Ferrin - J. Comput. Chem , 2004
"... Abstract: The design, implementation, and capabilities of an extensible visualization system, UCSF Chimera, are discussed. Chimera is segmented into a core that provides basic services and visualization, and extensions that provide most higher level functionality. This architecture ensures that the ..."
Abstract - Cited by 504 (7 self) - Add to MetaCart
session interactively despite being at separate locales. Other extensions include Multalign Viewer, for showing multiple sequence alignments and associated structures; ViewDock, for screening docked ligand orientations; Movie, for replaying molecular dynamics trajectories; and Volume Viewer, for display

Characterizing Machine Agent Behavior through SPARQL Query Mining

by Aravindan Raghuveer , 2012
"... Mining SPARQL queries to understand the behavior of automated programs (or machine agents) is an important step in designing systems for the semantic web. We present techniques that differ from state-of-the-art SPARQL mining techniques in two ways: 1. Move away from one SPARQL query at a time view t ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
to SPARQL user session view 2. Look at the results of SPARQL queries in addition to the query itself. Due to these two approaches, we are able to find two new patterns in SPARQL queries that help us reason better about the underlying program that generated the SPARQL queries. Through a variety

REAL LIFE, REAL USERS, AND REAL NEEDS: A STUDY AND ANALYSIS OF USER QUERIES ON THE WEB

by Bernard J. Jansen, Amanda Spink, Tefko Saracevic , 2000
"... We analyzed transaction logs containing 51,473 queries posed by 18,113 users of Excite, a major Internet search service. We provide data on: (i) sessions- changes in queries during a session, number of pages viewed, and use of relevance feedback, (ii) queries- the number of search terms, and the u ..."
Abstract - Cited by 286 (25 self) - Add to MetaCart
We analyzed transaction logs containing 51,473 queries posed by 18,113 users of Excite, a major Internet search service. We provide data on: (i) sessions- changes in queries during a session, number of pages viewed, and use of relevance feedback, (ii) queries- the number of search terms

Session Guarantees for Weakly Consistent Replicated Data

by Douglas B. Terry, Alan J. Demers, Karin Petersen, Mike J. Spreitzer, Marvin M. Theimer, Brent B. Welch , 1994
"... Four per-session guarantees are proposed to aid users and applications of weakly consistent replicated data: Read Your Writes, Monotonic Reads, Writes Follow Reads, and Monotonic Writes. The intent is to present individual applications with a view of the database that is consistent with their own ac ..."
Abstract - Cited by 195 (11 self) - Add to MetaCart
Four per-session guarantees are proposed to aid users and applications of weakly consistent replicated data: Read Your Writes, Monotonic Reads, Writes Follow Reads, and Monotonic Writes. The intent is to present individual applications with a view of the database that is consistent with their own

SPARQL Views: A Visual SPARQL Query Builder for Drupal

by Lin Clark
"... Abstract. Publishing Linked Data on the Web has become much easier with tools such as Drupal. However, consuming that data and presenting it in a meaningful way is still difficult for both Web developers and for Semantic Web practitioners. We demonstrate a module for Drupal which supports visual que ..."
Abstract - Cited by 8 (0 self) - Add to MetaCart
query building for SPARQL queries and enables meaningful displays of the query result. Keywords: User Interfaces, End-user Programming, CMS

Networked graphs: a declarative mechanism for sparql rules, sparql views and rdf data integration on the web

by Simon Schenk, Steffen Staab - In WWW ’08: Proceeding of the 17th international conference on World Wide Web , 2008
"... Easy reuse and integration of declaratively described information in a distributed setting is one of the main motivations for building the Semantic Web. Despite of this claim, reuse and recombination of RDF data today is mostly done using data replication and procedural code. A simple declarative me ..."
Abstract - Cited by 47 (6 self) - Add to MetaCart
Networked Graphs, which allow users to define RDF graphs both, by extensionally listing content, but also by using views on other graphs. These views can be used to include parts of other graphs, to transform data before including it and to denote rules. The relationships between graphs are described

Analysis of a local-area wireless network

by Diane Tang , 2000
"... To understand better how users take advantage of wireless networks, we examine a twelve-week trace of a building-wide local-area wireless network. We analyze the network for overall user behavior (when and how intensively people use the network and how much they move around), overall network traffic ..."
Abstract - Cited by 194 (3 self) - Add to MetaCart
traffic and load characteristics (observed throughput and symmetry of incoming and outgoing traffic), and traffic characteristics from a user point of view (observed mix of applications and number of hosts connected to by users). Amongst other results, we find that users are divided into distinct location

Searching RDF graphs with SPARQL and keywords

by Shady Elbassuoni , Maya Ramanath , Ralf Schenkel , Gerhard Weikum - In IEEE Data Engg. Bulletin , 2010
"... Abstract The proliferation of knowledge-sharing communities like Wikipedia and the advances in automated information extraction from Web pages enable the construction of large knowledge bases with facts about entities and their relationships. The facts can be represented in the RDF data model, as s ..."
Abstract - Cited by 17 (4 self) - Add to MetaCart
, as so-called subject-property-object triples, and can thus be queried by structured query languages like SPARQL. In principle, this allows precise querying in the database spirit. However, RDF data may be highly diverse and queries may return way too many results, so that ranking by informativeness

Detecting session boundaries from Web user logs

by Daqing He, Ayse Göker - In Proceedingsof of the BCS-IRSG 22nd Annual Colloquium on Information Retrieval Research , 2000
"... Detecting session boundaries on the Web is important for several reasons. Firstly, it is important to establish a common context for various statistics relating to user sessions and frequency of user activities. More specifically, it is important to detect some boundaries in order to group related ..."
Abstract - Cited by 58 (5 self) - Add to MetaCart
or IP address under the umbrella of one session regardless of the length of time covered by the logs. This tendency lacks a more user oriented view. Our argument is that a session on the Web can be defined as a group of user activities that are related to each other not only through an evolving

Fedra: Query Processing for SPARQL Federations with Divergence

by Gabriela Montoya, Hala Skaf-molli, Pascal Molli, Maria-esther Vidal
"... Abstract. Data replication and deployment of local SPARQL endpoints improve scalability and availability of public SPARQL endpoints, mak-ing the consumption of Linked Data a reality. This solution requires syn-chronization and specific query processing strategies to take advantage of replication. Ho ..."
Abstract - Cited by 3 (3 self) - Add to MetaCart
, and describe them using provenance and views. These descriptions enable Fedra to reduce the number of selected endpoints while satisfying user divergence requirements. Experiments on real-world datasets suggest savings of up to three orders of magnitude.
Results 1 - 10 of 524