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Wednesday, February 5, 2020 | History

3 edition of Detection of quasi-static electric fields radiated by electrically small emitters found in the catalog.

Detection of quasi-static electric fields radiated by electrically small emitters

Detection of quasi-static electric fields radiated by electrically small emitters

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  • 15 Currently reading

Published by U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology in [Gaithersburg, Md.] .
Written in English

    Subjects:
  • Antennas (Electronics) -- Mathematical models,
  • Field emission -- Mathematical models,
  • Electric discharges -- Detection

  • Edition Notes

    StatementDavid A. Hill, Kenneth H. Cavcey
    SeriesNISTIR -- 5096
    ContributionsCavcey, Kenneth H. 1938-, National Institute of Standards and Technology (U.S.)
    The Physical Object
    FormatMicroform
    Paginationvii, 31 p.
    Number of Pages31
    ID Numbers
    Open LibraryOL15332053M

    Two detectors are provided, each consisting of an imaging lens and a position-sensing detector. Then using the definition of E in Equation 3. Additionally, a preliminary cost analysis and commercialization plan shall be developed. The slip conditions induce surface shear that is not seen in most laboratory tests.

    The vehicle component, system or subsystem, hereinafter referred to simply as a component, may be any adjustable component of the vehicle including, but not limited to, the bottom portion and backrest of the seat, the rear view and side mirrors, the brake, clutch and accelerator pedals, the steering wheel, the steering column, a seat armrest, a cup holder, the mounting unit for a cellular telephone or another communications or computing device and the visors. In fact, the closer that the occupant gets to the airbag, the faster the inflation rate of the airbag is according to the Fujita et al. In the cases of inventions disclosed here, as discussed in more detail below, regardless of the number of transducers used, a trained pattern recognition system is preferably used to identify and classify, and in some cases to locate, the illuminated object and its constituent parts. Each of these systems, however, has significant limitations. In fact, the closer that the occupant gets to the airbag, the faster the inflation rate of the airbag is according to the Fujita et al. Also the IMS Digest publications illustrate the development of publishing technology.

    When a single receiving element is used, a PIN or avalanche diode is preferred. This idea was well received and became a regular component in subsequent symposia. The correct statement of Faraday's law is 3. In developing any mathematical "theory" for the description of some part of the physical world, approximations are made. It is expected that both military and civil aircraft development and upgrade programs will procure this system to support their platforms.


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Detection of quasi-static electric fields radiated by electrically small emitters Download PDF Ebook

Another important principle is that static E-field lines must always be perpendicular to surfaces with high ohmic conductivity. Additionally, in the frequency domain case, a chirp can be emitted and the reflected light compared in frequency with the chirp to determine the distance to the object by frequency difference.

Magnetostatic fields in material media, boundary value problems, magnetic circuits, magnatic coupling and reciprocity. The laser can either be used in a scanning mode, or, through the use of a lens, a cone of light can be created which covers a large portion of the object.

Quasistatic approximation

The system of claim 1, wherein said at least one system is distanced from said control unit and wirelessly coupled thereto. Consideration shall be given to improving manufacturing readiness level and airworthiness qualification through modeling and testing.

Significant improvements were made to the art in the current assignee's USRE which describes the method of placement of the transducers to increase the reliability of detecting and discriminating out-of-position occupants, empty seats, and rear facing child-seats.

Thus, significant improvements need to be made to airbag systems. In developing any mathematical "theory" for the description of some part of the physical world, approximations are made. Using appropriate hardware and software, the approximate configuration of the occupancy Detection of quasi-static electric fields radiated by electrically small emitters book either the passenger or driver seat can be determined thereby identifying and categorizing the occupancy of the relevant seat.

However, only 24 of the attendees were from outside the US. This depends on the time rate of variation of the electric field. In spite of these limitations, ultrasonics can provide sufficient timely information to permit the position and velocity of an occupant to be accurately known and, when used with an appropriate pattern recognition system, it is capable of positively determining the presence of a rear facing child seat.

Greiffenhagen, S. Most applications we draw from are high-frequency circuits. When both q and Q have the same sign, the force in Equation 3. According to Corrado et al. Improvements upon this system could be made in two key areas: the forward observer, and the gun tube itself.

Integrated circuit technology has enabled active devices to operate at increasingly higher frequencies, turning low-cost Si technology into a seemingly universal panacea for a wide array of applications. Ramesh, M. Phase shifters allowing steering of the beam shall be integrated on the interior wall using pick-and-place technology.

If the final design requires power amplification to overcome losses of printed structures to allow the design to be evaluated, these components should also be integrated on the interior wall. The sharp corners of the object concentrate the E-field, as indicated by the crowding of the field lines around the corners.

In still other cases, the reflected pattern from a passenger seat that is in a forward position can be similar to the reflected wave pattern from a seat containing a forward facing child seat or a child sitting on the passenger seat.

The demand for airbags is constantly accelerating in both Europe and Japan and all vehicles produced in these areas and eventually worldwide will likely be, if not already, equipped with airbags as standard equipment and eventually with occupant sensors.

Measurements of quasi

Montreal, Canada. This system included two subsystems: a nighttime subsystem for handling low-light conditions, and a daytime subsystem for handling ambient-light conditions. They are thus using the occupant motion as a Detection of quasi-static electric fields radiated by electrically small emitters book sensor.

For these reasons, there has been proposed an occupant sensor system also known as a seated-state detecting unit such as disclosed in the following U. Note that whether 4a is used to represent the EQS system or 4b is used for the MQS system, the conditions on the spatial scale L and time perhaps the reciprocal frequency are the same.

Finally, thanks to the folks who supported our research during the past four years. Perfecto, M. In the strict acceptance of the term the quasistatic case corresponds to a situation where all time derivatives can be neglected. This technique is particularly desirable when monitoring objects exterior to the vehicle to permit accurate measurements of devices that are hundreds of meters from the vehicle as well as those that are a few meters away.

A second camera can be added but to locate the same objects or features in the two images by conventional methods is computationally intensive unless the two cameras are close together.Quasi-Static Electromagnetic Dosimetry: From Basic Principles to Examples of Applications Daniele Andreuccetti Nicola Zoppetti Institute for Applied Physics “Nello Carrara” of the Italian National Research Council (IFAC-CNR), Italy An overview of quasi-static electromagnetic dosimetry is presented.

After an introductive description ofCited by: Electromagnetics for High-Speed Analog and Digital Communication Circuits Modern communications technology demands smaller, faster, and more efďŹ cient circuits, the design of which requires a.

Now, since a magnetic field exists, why is the energy of a capacitor only stored in the electric field? Usually the formula for the energy stored goes as $ W = \pi d A \times \frac{1}{2}\epsilon_0 E^2$, where the first term is the volume and latter is the electric field energy density.Limits to Statics and Quasistatics Pdf •Limits to Statics •Quasistatics •Limits to Quasistatics Electric Fields Magnetic Fields.

Quasi-static Maxwell Small device Inconsequential electric energy storage. .This banner text can have markup. web; books; video; audio; software; images; Toggle navigation.Electromagnetics from a quasistatic ebook Jonas Larsson Department of Physics, Umeå University, SE Umeå, Sweden Received 19 June ; accepted 20 October Quasistatic models provide intermediate levels of electromagnetic theory in between statics and the full set of .