Design, modeling, and measurements are discussed for a new direct-drive, electromagnetic valve actuator (EVA) for internal combustion engines. The actuator offers greater dynamic performance than previous designs and achieves fully flexible valve timing and lift, which provides great benefits in engine performance including increased engine efficiency, reduced emissions, and improved low-end pe...

Electromagnetic tomography (EMT), also known as magnetic inductance (MIT) is a tomographic modality widely employed in process industry and bio-medical applications. In particular, this technique plays an important role imaging metallic objects since it can produce conductivity permeability distributions the region of interest. An EMT system consists coil array, data acquisition reconstruction ...

This paper presents the design of a ring-shaped tri-axial fore sensor that can be incorporated into the tip of a guidewire for use in minimally invasive surgery (MIS). The designed sensor comprises a ring-shaped structure located at the center of four cantilever beams. The ringdesign allows surgical tools to be easily passed through which largely simplified the integration process. Silicon nano...

Introduction: One of the major causes of image non-uniformity in MRI is due to the existence of  non-homogeneity in RF receive and transmit. This can be the most effective source of error in  quantitative  studies  in  MRI  imaging.  Part  of  this  non-homogeneity  demonstrates  the  characteristics of RF coil and part of it is due to the interaction of RF field with the material being  imaged...

Active feedback control has been used in the HBT-EP tokamak to control the growth of the n=1 resistive wall mode. These experiments were carried out using a set of thin stainless-steel wall segments with magnetic diffusion time of ~0.4 ms positioned near the plasma boundary. In plasmas that would normally exhibit a strong ideal n = 1 external kink mode without a nearby conducting wall, the resi...

Sheet metal coils are widely used in the steel, automotive, and electronics industries. Many of these processed through stamping or laser cutting to form different types shapes. coil leveling is an essential procedure before any forming process. In practice, this now executed by operators primarily relies on their experience, resulting many trials errors settling correct machine parameters. sma...

For the manufacture of spring springs rolling stock (wagons, locomotives, cars), bars made steels are used. With high-temperature machining, when winding and quenching them, there is a difference in cooling rates inner outer sides coils, which leads to structural state affects durability springs. The aim work study effect changes surfaces steel coils after high–temperature machining operations ...

BACKGROUND AND PURPOSE Previous studies have depicted arterial and aneurysmal anatomy with three-dimensional time-of-flight (3D-TOF) MR angiography before and after treatment with Guglielmi detachable coils (GDCs) and with CT angiography before and after treatment with stents and stent-grafts. We investigated the ability of time-resolved contrast-enhanced 3D MR angiography (3D MR digital subtra...

in the present study the effect of curvature ratio and coil pitch for tio2/water nanofluid laminar flow on heat transfer behavior and pressure drop through helical coils with different geometries was investigated experimentally. the tio2/water nanofluids at 0.25% to 2% particle volume concentrations have been prepared by using a two-step method. the experiments were performed for coils with cur...