Theorical study

Theoretical studies

In all studies, the first step is to establish the scientific frame of the problem. Semantic TS realizes bibliographic synthesis, feasibility studies and theoretical developments of physical problems related to the following domains:

Feasibility studies and Bibliographic synthesis

	Bibliographic synthesis of inversion methods in acoustic tomography
	Bibliographic synthesis of random processes in underwater medium
	Operational bibliography on the effects of hydrometeors on the electromagnetic and infrared systems (French Navy product) Abstract
	Study of the chaos in acoustical propagation in North East Atlantic - Setting of determination criterion Paper

Theoretical approach and modeling of physical problems especially acoustic and electromagnetism propagation and with taking into account random physical parameters

	Stochastic approach of the sound propagation equation in random medium using the Itô's formalism - Application to the study of internal waves Abstract, Paper, PhD
	Stochastic approach of the electromagnetic propagation equation in random medium using the Itô's formalism - Application to the study of atmospheric turbulence Abstract, Paper, PhD
	Study of transient signals propagation Paper
	Underwater acoustic propagation model based on ray theory in ocean medium.
	Modeling of underwater transmission channel and underwater acoustic (UWA) communications

Numerical resolution of equations and computer implementation

	Numerical resolution of the parabolic equations obtained for the first statistical moments of the sound field in underwater random medium PhD
	Study of reliability area of underwater rays model in a range dependent ocean. PhD
	Analysis of non local boundary conditions in a standard parabolic equation (PE) model of electromagnetism propagation Abstract
	Terrain radar PE model Abstract

Telemetry, Acoustic tomography, Positioning system, Tracking system

	Improvement of radiated noise measurements systems from ranges (Cap Ferrat, Brusc), and from submarines
	Study of theoretical evaluation of vertical array performances in ocean acoustic tomography with a random propagation model
	Development of a tracking system ALHAMBRA

Due to their own education (PhD and Postgraduate Degree), Semantic TS' employees have the required experience for research. Furthermore, this scientific knowledge is often upgraded by researching and consulting the scientific press (IEEE, JASA, Radio Science, Proceedings, ...), by publishing papers (cf. papers). At last, Semantic TS is used to work in collaboration with the laboratory of applied mathematics, MNC Modélisation Numérique et Couplage, of the University of Toulon - France.