The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The purpose of this work is to establish a numerical framework capable of generating simulation data with the same statistical properties as the represented electrical reverberation chamber (ERC). While an ERC whose resonating volume is geometrically varied produces randomly distributed fields, a numerical simulation is a deterministic system. However, the statistical distributions of electrical fields...
This paper introduces the concept of Algebraic Electromagnetism to solve the problem of finding stable spatial discretizations of the electromagnetic field for large scale, ultra-wide-band electromagnetic systems, composed of possibly nonlinear subsystems with memory and/or hysteresis effects. It is a thorough approach to exact discrete electromagnetism, given by an algebraic construction of general...
This paper presents a transformation of Maxwell's equations for general nonlinear material operators into a system state equation of an equivalent nonlinear distributed parameter system. The proposed formulation has a fair amount of practical and didactic advantages, with regard to modeling hysteresis and memory effects, understanding causality, control and stability of electromagnetic fields, formulating...
Generally electronic equipment is EMC tested before it is integrated into more complex systems or IT networks. But today there is a lack of susceptibility tests of complex electronic systems in their typical application environment. However, this requirement is essential for IEMI assessment of critical infrastructure. Recently at WIS a special office module was installed to ensure an adequate test...
During the last five decades computing power has become more widely available. Consequently the solving of practical engineering and scientific problems has shifted towards virtual computer based assessments. A new field based on mathematical models and modern computers arose from this development and is called scientific computing. This field consists of numerical mathematics, computer science and...
The numerical simulation of wideband electromagnetic interference puts a strong emphasis on methods in time domain. The stable subgrid finite difference time domain method gives the opportunity for an efficient adaptive discretization in time and space. The MPI parallelization and in particular the GPU as well as multi-GPU implementation of this method provides a simulation tool of high benefit for...
The quality of a real open area test site is affected by many factors, e.g., constructive elements carrying antennas, their power supply, the electric properties of the ground, or surrounding scattering sources. To quantitatively determine the influence of all factors that make a real test site differ from an ideal one, numerical simulation is employed here. Hence, it will become possible to arrange...
To computationally tackle electromagnetic system security problems, a general new approach for obtaining exact ordinary differential equation system representations of Maxwell's equations is presented. The approach is compatible with a huge class of general non-linear material operators and emphasis is put on the problem of unauthorized control. This problem is modelled at the physical representation...
During the last two decades scientific computing has been developed as an additional form of science and engineering. Scientific computing links theory and laboratory experiment in a kind of theory based virtual testing environment. The approach is to gain understanding based on computer implemented mathematical models. Common quality assurance systems like ISO 9001 demand validation and verification...
As the overexposure of personnel aboard ships to electromagnetic fields must be prevented, the protection against the hazards of non-ionizing radiation from antennas fed by high-powered transmitters is important. Such a protection is usually realized by organizational methods based on radiation protection areas on deck. Various standards and guidelines are enforced to ensure safe levels of radiation...
In this article, we present the current status of the Internet of Things, and discuss how the current situation of many "Intranets" of Things should evolve into a much more integrated and heterogeneous system. We also summarize what in our opinion are the main wirelessand mobility-related technical challenges that lie ahead, and outline some initial ideas on how such challenges can be addressed...
Dynamically reconfigurable hardware has already been deployed for accelerating computationally demanding applications. Some of these hardware architectures allow run time reconfiguration but this leads usually to a large reconfiguration overhead. The advantage of run time reconfiguration is that it allows new algorithmic solutions for many applications. To study the potential of frequent run time...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.