Prediction of the Magnetic State of Ferromagnetic Objects by Assimilating Data into a Physical Model

This paper presents a hybrid model to estimate the magnetic behaviour of a ferromagnetic structure. The mathematical-physical model has been developed using the Method of Moments combined with a hysteresis model. The mathematical model was derived by a linearisation of the hysteresis curve. The initial magnetic state of a ferromagnetic object is...

Experimental methods. Committee V.2

Design methods and rule requirements have to be benchmarked with experimental or service history data. The Goal Based Standards (GBS) approach by IMO, see e.g., IMO Res. 296(87), 454(100) or MSC.1/Circ.1394, require benchmarking of standards by measuring the perfor mance of methodologies, assessments, criteria and requirements by using...

Influence of chronic diseases on societal participation in paid work, volunteering and informal caregiving in Europe: a 12-year follow-up study

Background This study aims to provide insight into the associations between having a chronic disease and participation in paid work, volunteer activities or informal care, the associations between the onset of a chronic disease and these forms of societal participation, and whether these associations differ across educational level and gender....

Low- to mid-frequency scattering from elastic objects on a sand sea floor: Simulation of frequency and aspect dependent structural echoes

The scattering from roughly meter-sized targets, such as pipes, cylinders and unexploded ordnance shells in the 130 kHz frequency band is studied by numerical simulations and compared to experimental results. The numerical tool used to compute the frequency and aspect-dependent target strength is a hybrid model, consisting of a local finite...

A blast absorber test: Measurement and model results

A blast absorber test was conducted at the Aberdeen Test Centre from 13 to 17 June 2005. The test was set up to determine the absorbing and shielding effect of a gravel pile, of 1.5 meters high and 15 by 15 meters wide, on blasts from large weapons: e.g. armor, artillery or demolition. The blast was simulated with single brick C-4 charges of 570...