An Assessment of the Suitability of the Body and Adult Head Coils for Transmission during Paediatric Magnetic Resonance Imaging
G.R. Cook, M.J. Graves, F.J. Robb, D.J. Lomas
Department of Radiology, University of Cambridge, Cambridge, United Kingdom
General Electric Healthcare Coils, Aurora, Ohio, USA
MRI offers many advantages over other modalities and its lack of ionizing radiation is important for children, but can be limited by the radio-frequency (RF) coils available. This work calculates Specific Absorption Rate (SAR) and homogeneity of the RF transmit field (B1+) when imaging infants in adult coils. Two birdcage-type coils were loaded by a tissue model and their B1+ homogeneities ...
3D COMSOL Multiphysics® Model of a Plate Heat Exchanger to Support a Laboratory Teaching Environment - new
N. Medeiros, W. Clark
Worcester Polytechnic Institute, Worcester, MA, USA
Chemical engineering students and practitioners need an understanding of fluid flow and heat transfer inside heat exchangers. Because the flow within plate heat exchangers is difficult to visualize, we developed COMSOL Multiphysics® simulations of plate heat exchangers for students to study alongside a physical heat exchanger in a laboratory setting. Simulative experiments allow students to ...
L. Fromme , J. Waßmuth , D. Wehmeier ,
 Bielefeld University of Applied Sciences, Bielefeld, Germany
The knowledge of the acoustical transfer paths in active noise control systems is very important for the performance of the system. Unfortunately, simulation is challenging since even simple configurations require comprehensive experience in physics and modeling. Two test setups were chosen for basic investigations on modeling, simulation and validation. The first results presented here are ...
O. Kraft , J. Gaiser , M. Stripf ,
 University of Applied Sciences, Karlsruhe, Baden-Würtemberg, Germany
Standard measuring techniques for thermal conductivity cannot be readily applied to determine the load-dependent thermal conductivity of porous adsorbents, because the local ad- and desorption inside the specimen and the thickness of the specimen are not considered. Hence, in this work a new measuring procedure combining the transient hot bridge (THB) with a three dimensional finite element ...
B. Baumann , J. Schwieger [1, 2], U. Stein , M. Wolff ,
 Hamburg University of Applied Sciences, Hamburg, Germany
 University of the West of Scotland, Paisley Campus, United Kingdom
Today’s driver hardware for High-intensity discharge (HID) lamps is bulky, expensive and not particularly energy-efficient. A downscaling of the devices seems possible by increasing the operation frequency from typically 400 Hz to some hundred kilohertz. However, efforts to design high-frequency lamp-driver systems were not successful, since the periodic Joule-heating generates sound waves, ...
J. D. Wheeler , P. Namy , C. Coulouarn , E. Benade ,
 SIMTEC, Grenoble, France
 TDA Armements, LA-FERTÉ-SAINT-AUBIN, France
In the scope of improvement of the industrial “ammunition cooling” process, a COMSOL Multiphysics® model is developed to transfer an existing cooling process. A device filled with a liquid explosive mixture is placed in an apparatus which controls the environment temperature. This explosive mixture undergoes a phase change during the cooling and the solidification enthalpy is introduced to the ...
V. M. Dhagat , P. Dufilie ,
 University of Connecticut, Mansfield, CT, USA
 Phonon Corporation, Simsbury, CT, USA
New drug discovery and development is costly; of all compounds investigated for use in humans, only a small fraction is approved for treatments around the world. The pharmaceutical industry has started switching from molecular drugs to protein-based drugs due to high specificity, enhanced efficacy, affinity, solubility, and low toxicity. The estimated market growth of protein-based drugs is ...
M. Fukukawa , L. Tong ,
 Keisoku Engineering System Co. Ltd., Tokyo, Japan
The reciprocating paddle electrochemical plating cells have been widely applied in microelectronics industry [1-2].The reciprocating paddle is often driven over a cathode aspect horizontally by oscillation set outside a plating cell. The paddle reciprocating parallel to a plating side stirs the electrolyte around the plating aspect to improve electric current distribution on the cathode. The ...
M. Morales , , J. J. Moreno  , D. Munoz-Martin  , C. Molpeceres 
Centro Láser UPM, Universidad Politécnica de Madrid, Madrid, Spain
Laser-induced forward transfer (LIFT) is a non-contact direct-write technique that enables the deposition of small volumes of material into user-defined high-resolution patterns with a wide range of structural and functional materials. There are many variations of the LIFT process, each differing in how the laser is absorbed and converted into the mechanical energy required for material ejection ...
Sonsight Inc. / NSWC, Accokeek, MD, USA
Cogging torque in permanent magnet motors and generators is characterized by a torque ripple. These torque fluctuations cause vibrations, noise and speed fluctuations. This paper presents finite element (FE) analyses results that show a previously unaddressed low frequency modulation of cogging torque ripple. The paper resulted in an analytical formulation of cogging torque with low frequency ...