We describe our submission to the Image Relevance Assessment Task (IRAT) at the 2012 Text REtrieval Conference (TREC) Crowdsourcing Track. Four aspects distinguish our approach: 1) an interface for cohesive, efficient topicbased relevance judging and reporting judgment confidence; 2) a variant of Welinder and Perona’s method for online crowdsourcing [17] (inferring quality of the judgments and ...

the track stiffness experienced by a train will vary along the track. sometimes the stiffness variation may be very large within a short distance. one example is when an unsupported sleeper is hanging in the rail. track stiffness is then, locally at that sleeper, very low. at insulated joints the bending stiffness of the rail has a discontinuity implying a discontinuity also of the track stiffn...

This paper gives an overview of the INEX 2013 Snippet Retrieval Track. The goal of the Snippet Retrieval Track is to provide a common forum for the evaluation of the e ectiveness of snippets, and to investigate how best to generate snippets for search results. Such snippets should provide the user with su cient information to determine whether the underlying document is relevant. We discuss the...

This paper gives an overview of the INEX 2012 Snippet Retrieval Track. The goal of the Snippet Retrieval Track is to provide a common forum for the evaluation of the e ectiveness of snippets, and to investigate how best to generate snippets for search results, which should provide the user with su cient information to determine whether the underlying document is relevant. We discuss the setup o...

Analysing track geometry defects is critical for safe and effective railway transportation. Rectifying the appropriate number, types and combinations of geo-defects can effectively reduce the probability of derailments. In this paper, we propose an analytical framework to assist geo-defect rectification decision making. Our major contributions lie in formulating and integrating the following th...

Thorough understanding of steel rail response to wheel load is a key step towards design and evaluation of the railway track structure. In current practice, maximum vertical deflection and bending moment are calculated using the theory of infinite beam on continuous elastic foundation (Winkler model), in which the foundation stiffness is assumed as constant. However, variation of track modulus ...