نتایج جستجو برای: magnetic calibration
تعداد نتایج: 393345 فیلتر نتایج به سال:
In this paper we present a fully-integrated magnetic current monitor, which allows accurate and non-invasive current measurements in industrial apparates. The magnetic field generated by the current to be measured is sensed by a Hall device, amplified, converted into the digital domain with 9 bits of resolution and delivered to an on-board I 2 S serial interface. The voltage amplifier provides ...
background celiac disease (cd) is a disorder associated with body reaction to gluten. after the gluten intake, an immune reaction against the protein occurs and damages villi of small intestine in celiac patients gradually. objectives the osc, a filtering method for minimization of inter- and intra-spectrometer variations that influence on data acquisition, was applied to biofluid nmr data of c...
BACKGROUND Measurement of myocardial iron is key to the clinical management of patients at risk of siderotic cardiomyopathy. The cardiovascular magnetic resonance relaxation parameter R2* (assessed clinically via its reciprocal, T2*) measured in the ventricular septum is used to assess cardiac iron, but iron calibration and distribution data in humans are limited. METHODS AND RESULTS Twelve h...
asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...
The purpose of this study is to investigate the optimal reference geometry for gamma camera calibration. Yet another question of interest was to assess the influence of the number of 3D Ordered Subsets Expectation Maximization (3D-OSEM) updates on activity quantification for SPECT imaging with 177Lu. The accuracy of 177Lu activity quantification was assessed both in small and in large objects. ...
Small, high speed B-dot probes were constructed and calibrated as instruments to detect the spontaneous magnetic field of laser-produced plasma, following established techniques. A network analyzer and oscilloscopes were used to diagnose the source of interference observed both in the calibration of the probes and in the laser-plasma measurements. Methods of reducing the interference were formu...
The dark flux correction step of the Faint Object Spectrograph calibration pipeline was investigated with the joint aims of applying a more physical model and improving the performance of the pipeline. After processing with the original calfos pipeline, dark calibration data shows a large scatter in count rates. We were able to reduce this scatter to some extent by scaling the correction accord...
Cantilevers and optical tweezers are widely used for micromanipulating cells or biomolecules for measuring their mechanical properties. However, they do not allow easy rotary motion and can sometimes damage the handled material. We present here a system of magnetic tweezers that overcomes those drawbacks while retaining most of the previous dynamometers properties. Electromagnets are coupled to...
A self-calibration method was proposed to compensate the drawback generated by classic ellipsoid fitting algorithm. In this paper magnetometers and accelerometers were chosen to obtain geomagnetic field and gravitational field for TRIAD algorithm. The first step is using the classic ellipsoid fitting to calibrate the magnetic vector, which is taken as an internal reference in the second step. D...
This paper describes a unique single camera-based dimensional measurement with a self-calibration method of image-based measurement. The system has been designed and implemented in one of the integrated steel plants in India. The purpose of the system is to obtain the frontal cross-sectional area of an ingot irrespective of its distance from the camera head. Automatic calibration is achieved by...
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