A Semi-Automated System for Accurate Gaze Coding in Natural Dyadic Interactions

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In this work, we address the numerical solution of fluid-structure interaction problems. This issue is particularly difficulty to tackle when the fluid and the solid densities are of the same order, for instance as it happens in hemodynamic applications, since fully implicit coupling schemes are required to ensure stability of the resulting method. Thus, at each time step, we have to solve a highly nonlinear coupled system, since the fluid domain depends on the unknown displacement of the structure. Standar

In order to permit a brain computer efficient communication, it is important to dispose of an efficient algorithm to decode the brain electrical activity. We will focus our attention on an algorithm based on microstates segmentation of the brain electrical activity. First of all, we are going to use electroencephalogram measurements (EEG, 10/20 international system) to collect the electrical activity of the brain. Each sixteen electrodes of the EEG will sample the data at the same rate, forming a matrix of

We consider a heterogeneous model for the dynamics of a blood solute both in the vascular lumen and inside the arterial wall. In the lumen, we consider an advection-diffusion equation, where the convective field is provided by the velocity of blood, which is in turn obtained by solving the Navier-Stokes equations. Inside the arterial wall we consider a pure diffusive dynamics. Since the endothelial layer at the interface between the lumen and the wall acts as a permeable membrane, whose permeability depends

There is provided a method for plasmid DNA extraction to reproducibly yield relatively crude preparation which is suitable for transfection into mammalian cells. The inventors have determined that the high level of purification previously thought to be necessary in order to successfully allow transfection of the plasmid DNA into cells is not required. The inventors have developed a method of producing a transfectable plasmid preparation that can be performed on a large scale that avoids the use of specializ

Many laboratory studies have shown the beneficial effects of weld improvement methods on the fatigue strength of welded details. However, no structural codes systematically include weld improvement methods in detail classification. The purpose of this paper is to discuss the possibilities of using these methods in practice on either new or existing structures. This paper provides the reader with practical rules for designing and computing the fatigue strength of improved welded joints. A computation method

The paper presents a new method for the automatic monitoring of bridges deformations. Based on the use of electronic high precision inclinometers, this method permits to accurately reconstruct the deflected shape of the bridge and to follow its long-term evolution. A practical and efficient method for the reconstruction of the deflected shape from measured rotations is proposed. The example of an actual bridge in Western Switzerland, in which the system is operational, is described. The results obtained cor

The authors present a method for generating conversations between human-like agents and this will be done by proposing specific parameters for inter-agent messages with an approximation of virtual sound propagation. We will then be able to simulate appropriate human-like behaviours automatically. For instance, we demonstrate how to create proper reactions for agents that are not able to understand, but only to hear the sentences. Finally, we develop the notion of conversation privacy and inter-agent coopera

The objective of this study is to present a new method of physical activity monitoring, able to detect body postures (sitting, standing and lying) from only one kinematic sensor attached on the chest. Wavelet analysis in conjunction with a simple kinematics model is used to recognize different posture transitions during daily physical activity. The postures observed with this technique matched those obtained with a reference optical motion system. Accurate results were also obtained during real-life testing

A numerical model is presented for the simulation of complex fluid flows with free surfaces. The unknowns are the velocity and pressure fields in the liquid region, together with a function defining the volume fraction of liquid. Although the mathematical formulation of the model is similar to the volume of fluid (VOF) method, the numerical schemes used to solve the problem are different. A splitting method is used for the time discretization. At each time step, two advection problems and a generalized Stok

The TCV Tokamak was designed to create a large variety of plasma shapes. Such a large flexibility requires high precision magnetic measurements with a good spatial coverage. This article gives a detailed description of the magnetic sensor geometry, fabrication, calibration, the associated electronics, and the diagnostic operation and monitoring. A substantial effort has been made to quantify the precision in the measurements and a novel method has been developed to derive corrections in the sensor position

The scaled boundary finite-element method, alias the consistent infinitestimal finite-element cell method, is developed. The governing partial differential equations of linear elastodynamics are transformed to a system of linear second-order ordinary differential equations of displacements as functions of the radial coordinate. Introducing the definition of the dynamic stiffness a system of nonlinear first-order ordinary expansion for high frequency yeilds the boundary condition satisfying the radiation con

A FIA method has been developed and fully characterized for the simultaneous detection of ammonia and glutamine in culture media. Ammonia detection is based upon a chem. method and does not require an electrode. This species diffuses across a hydrophobic porous membrane into an indicator soln., the absorbance of which is continuously monitored using a LED and a phototransistor. Glutamine was detd. by a difference method in which ammonia was measured before and after passage through a module contg. immobiliz

A Semi-Automated System for Accurate Gaze Coding in Natural Dyadic Interactions

Chat with Graph Search

Acceleration of a fixed point algorithm for fluid-structure interaction using transpiration conditions

Brain states analysis for direct brain-computer communication

A domain decomposition method for advection-diffusion processes with application to blood solutes

Transfection using plasmid preparations

On the practical use of weld improvement methods

Automatic Monitoring of Bridges using Electronic Inclinometers

A sound propagation model for interagents communication

A new method for body posture detection using a kinematic sensor

Numerical simulation of free surface flows

Magnetic measurements on the TCV Tokamak

The scaled boundary finite-element method – alias consistent infinitesimal finite-element cell method – for unbounded media

Online simultaneous monitoring of ammonia and glutamine in a hollow-fiber reactor using flow injection analysis