Resistance spot welded 1.2 mm (t)-thick 1400 MPa martensitic steel (MS1400) samples are fabricated and their microstructure, mechanical properties investigated thoroughly. The performance failure modes exhibit a strong dependence on weld-nugget size. pull-out mode for MS1400 resistance welds does not follow the conventional size recommendation criteria of 4t0.5. Significant softening was observ...

The idea of “nugget pyramids” has recently been introduced as a refinement to the nugget-based methodology used to evaluate answers to complex questions in the TREC QA tracks. This paper examines data from the 2006 evaluation, the first large-scale deployment of the nugget pyramids scheme. We show that this method of combining judgments of nugget importance from multiple assessors increases the...

Gaussian Processes (GPs) are often used to predict the output of a parameterized deterministic experiment. They have many applications in the field of Computer Experiments, in particular to perform sensitivity analysis, adaptive design of experiments and global optimization. Nearly all of the applications of GPs to Computer Experiments require the inversion of a covariance matrix. Because this ...

Ti6Al4V titanium alloy is applied extensively in the aviation, aerospace, jet engine, and marine industries owing to its strength-to-weight ratio, excellent high-temperature properties and corrosion resistance. In order to extend the application range, investigations on welding characteristics of Ti6Al4V alloy using more welding methods are required. In the present study, Ti6Al4V alloy sheets w...

Surface composite layers were successfully fabricated on an A 1050-H24 aluminum plate by dispersed iron (Fe) and magnetite (Fe₃O₄) particles through friction stir processing (FSP). Fe and Fe₃O₄ powders were packed into a groove of 3 mm in width and 1.5 mm in depth, cut on the aluminum plate, and covered with an aluminum sheet that was 2-mm thick. A friction stir processing (FSP) tool of square ...

A methodological framework for assessing accuracy of the GDEM product is described using four small case studies in areas of variable relief and forect canopy (Booschord in the Netherlands, Calabria in Italy, Fishcamp in USA and Zlatibor in Serbia). Focus is put on evaluating the true accuracy of ASTER GDEM using LiDAR data aggregated to 30 m resolution. Three aspects of accuracy have been eval...

Different methods have been applied to refine various characteristics of the zone (or nugget) obtained by friction stir welding (FSW). In the current research, joining components are vibrated normal to the weld line during FSW to refine the zone microstructure. This process is described as friction stir vibration welding (FSVW). The effect of FSVW on mechanical properties, corrosion behavior, a...

This paper describes our participation in the MobileClick track of NTCIR-11. We present our methods and results for both iUnit retrieval and summarization. Our ranking methods for the retrieval task are essentially two-step methods in which we first create a model pseudo-nugget, and then promote iUnits that are the most similar to that model pseudo-nugget. Our summarization methods consist in s...

We develop a value range analysis for higher-order programs. The analysis extracts a nugget that characterizes the value bindings resulting from program execution. This abstraction can be fed into a theorem prover to extract non-trivial inductive properties about programs, including the range of values assigned to variables during program execution. The paper incorporates several new technical ...