Universitá Campus Biomedico
Finite elements are a very powerful tool for theoretical physics. COMSOL allows people to easily handle them without facing the problem of programming long FORTRAN/C++ codes. This presentation will show the use of COMSOL in curved spacetimes. --------------------------------- Christian Cherubini was one of the keynote speakers at the COMSOL User's Conference, fall 2005 in Milano
Centro Ricerche FIAT
Fuel cell converts chemical energy directly to electrical energy through oxidation-reduction reactions. It consists of an electrolyte between two electrodes, the anode and the cathode. The engineering and materials challenges that must be overcome to produce fuel cells small enough for micro-applications (telephones, PDAs, etc.) are enormous, and will require innovative ...
S. Quiniou1, F. Lesage1, V. Ventenat2, and M. A. Latifi1
1Laboratoire des Sciences du Génie Chimique, Nancy, France
2Centre de Recherche Decathlon, Villeneuve d'Ascq, France
In this paper, an investigation of heat and mass transfer in two-layer fabrics, used in the manufacture of comfortable sportswear, is presented. It is based on a model described by partial differential equations representing the mass balance of water vapor, free and adsorbed water and the heat balance in the fabric. The model involves several unknown physical and transfer parameters. A specific ...
Numerical Modeling of the Electrochemical Behaviour of Metallic Alloys based upon Experimental Measurements at the Macro- and Microscale
H. Krawiec1, V. Vignal2, and R. Akid3
1AGH University of Science and Technology, Krakow, Poland
2ICB, UMR 5209 CNRS, Université de Bourgogne, Dijon, France
3Sheffield Hallam University, Sheffield, UK
Micro capillary-based techniques allow the interrogation of single metallurgical sites and are therefore becoming increasingly popular for the investigation of the electrochemical behavior of metallic phases and non-metallic heterogeneities in alloys. This study was carried out to assess the differences between current measurements made using a 'closed' micro-capillary system (the electrochemical ...
Department of Mathematics, Bologna University, Bologna, Italy
Partial differential equations have recently become popular and useful tools for several image processing tasks such as image de-noising and segmentation.In this work, we implement a unified image de-noising and segmentation approach which is based on a nonlinear diffusion equation with a reactive term for achieving edge preserving smoothing and segmentation. This model is highly nonlinear and ...
Simulation-based Analysis of the Spatial Sensitivity Function of an Electrical Capacitance Tomography System
A. Fuchs, and H. Zangl
Institute of Electrical Measurement and Measurement Signal Processing, Graz University of Technology, Graz, Austria
This paper investigates the effects of the soft field character of an Electrical Capacitance Tomography system by means of analyzing the 3D sensitivity distribution of the pipe interior using Finite Element Analysis.The aim of the determined sensitivity is to overcome restrictions caused by the soft field without being forced to use (active) guarding strategies.
J.-M. Barois, and C. Goulmy
PHOTONIS, Brive, France
Streak tubes are widely used in high-speed signal analysis; they give spatial, temporal and intensity information about one single event. Time resolutions of 0.7 pico-second can be achieved and in that time-domain, PHOTONIS tubes are second-to-none.Applications are numerous and range from plasma physic to femtosecond laser applications. In streak tubes, electrons move from the photocathode to the ...
M. C. Suarez-Arriaga1, F. Samaniego2, and J. Bundschuh3
1Faculty of Sciences, Michoacan University, Morelia, Mich., Mexico
2Faculty of Engineering, National University of Mexico, Morelia, Mich., Mexico
3Instituto Costarricense de Electricidad (ICE), Morelia, Mich., Mexico
We developed a new numerical model able to predict the critical oil rate for which oil-producing wells can be invaded by geothermal brine. The model is a single nonlinear partial differential equation (PDE) which depends only on water saturation. This PDE is a 3D-generalization of the classical 1D-Buckley-Leverett model. To solve this model, we used Lagrange-quadratic finite elements into the ...
Geometrical Optimization of Pyrophosphate Concentration in Thermosequencing Platform for DNA Sequencing
H. Esfandyarpour1,2, B. Zheng1, R. F. W. Pease1, and R. W. Davis2
1Center for Integrated Systems, Department of Electrical Engineering, Stanford University, Stanford, CA, USA
2Stanford Genome Technology Center, Stanford, CA, USA
For the past three decades, Sanger’s method has been the primary DNA sequencing technology; however, inherent limitations in cost and complexity have limited its usage in personalized medicine and ecological studies. A new technology called “Thermosequencing” can potentially reduce both the cost and complexity of DNA sequencing by using a microfluidic platform. To optimize the efficiency of ...
H. Prentice-Mott, D. Irimia, A. Russom, and M. Toner
Center for Engineering in Medicine (BioMEMS Center), Massachusetts General Hospital, Charlestown, MA, USA
Microfluidics is able to provide many benefits to the fields of biology and chemistry through its ability to use small amounts of fluid and to finely control the environment of the experiment. However, the precision of the flow rate control at the microscale remains limited to either off-chip variable-flow-rate pumps or on-chip valves.Here, we report an on-chip pneumatic valve that allows for ...