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Showing 1 to 20 of 1886 for “"dielectric"”.
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Dielectric characterization using a Wideband Dielectric Filled Cavity (WDFC)
… sample configurations used for characterizing dielectric materials over a wide band of frequencies. In the two configurations, a cylindrical cavity completely filled with a sample of the dielectric material of interest is used. The two configurations are the following: 1. The cylindrical cavity …
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Dielectric Coated Spheroidal Radiators
Made available in DSpace on 2014-12-04T21:03:06Z (GMT). No. of bitstreams: 1 5900597.pdf: 4913521 bytes, checksum: 8213fe52a3d822da874df27cab27bf6f (MD5) Previous issue date: 1958
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Dielectric Properties of lce
A laboratory study of the dielectric behaviour of single crystals of ice from a temperate glacier and ice cores from the Greenland ice cap is described. A field investigation of the properties of snow on Axel Heiberg Island (Arctic Canada) is discussed. The permittivity of ice in the HF and VHF …
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Instability of Dielectric Elastomer Actuators
Dielectric elastomers (DEs) are an important class of materials, currently employed in the design and realization of electrically-driven, highly deformable actuators and devices, which find application in several fields of technology and engineering, including aerospace, biomedical and mechanical …
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Dielectric Behavior in Polar Solvents
Made available in DSpace on 2014-12-05T19:37:27Z (GMT). No. of bitstreams: 1 6003894.pdf: 3343322 bytes, checksum: cde36891f9056e1b37e16e41dbae686d (MD5) Previous issue date: 1960
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Dielectric Breakdown of Silver Azide
… though t to take place. These fields can lead to dielectric breakdown, although the incubation period may l as t up to several days - but less than a second if the field is 0.4 MV.m- l or higher. Evolution of nitrogen has been measured by mass spectrometry under this condition. Based on a …
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Dielectric Measurements for Organ Cryopreservation
… rapid. One proposed warming technique employs dielectric heating using electromagnetic energy at microwave frequencies. Crucial to the design of any such rapid warming system are the electrical properties of the material to be heated. This dissertation describes two measurement systems that …
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Electrification by liquid dielectric flow
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
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Dielectric sensing of silicon accelerometers
… be addressed by replacing this air gap with a dielectric. Not only does it mitigate these concerns, it also offers potential for smaller device footprint, more robust design, and increased shock survival. This project developed a new accelerometer design sandwiching a thin film dielectric …
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Dielectric loss determination using perturbation
A dielectric filled cavity structure is currently being used to estimate the dielectric constant and loss factor over a wide range of frequencies of a dielectric material which fills the cavity structure [Saed, 1987]. A full field analysis is used to compute the effective complex permittivity of …
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Dielectric measurement based microstrip transmission line
The measurement of complex dielectric properties of materials at radio frequency is very important especially in the research fields, such as material science, microwave circuit design, absorber development, biological research, etc. Dielectric measurement is important because it can provide the …
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Performance Optimisation of Dielectric Elastomer Generators
A Dielectric Elastomer Generator (DEG) is an electromechanical transducer, basically a highly deformable parallel-plate capacitor, made up of a soft DE membrane coated with two compliant electrodes on its opposite surfaces. This device is able to convert mechanical work, emanating from its …
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The dielectric constant of liquid ammonia
Thesis (M.A.)--University of Kansas, Chemistry, 1917. ; Includes bibliographical references.
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Dielectric elastomers for space robotics applications
… soft, a robot must be powered by soft actuators. Dielectric elastomer transducers (DETs) made from carbon-silicone composites offer many advantages as artificial muscles; they are lightweight, have a high work density, and are capable of artificial proprioception. Taking inspiration from nature, …
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Dielectric micro-cavity surface-emitting lasers
… in the previous design were replaced by dielectric material to reduce extra metal loss. Both theoretical and experimental studies on such dielectric micro-cavity surface-emitting lasers are presented. In addition, issues related to cavity size reduction are also investigated. A …
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Dielectric noise spectroscopy of relaxor ferroelectrics
… at sorting out the internal dynamics of high dielectric materials. Specifically we have examined the dynamics of the relaxor ferroelectric material PLZT(B/65/35) in the ""frozen"" state. A relaxor ferroelectric is a material which has local ferroelectric order on the 1 Onm scale (nanodomains) …
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Enhanced Raman spectroscopy at dielectric interfaces
The examination of the merits of a new type of sampling structure for performing enhanced Raman scattering is presented here. These structures typically consist of 50 A of SiO$\sb2$ sputtered on Ag or Au island films, all coated on a lithographically defined opening in a masked SiO$\sb2$ substrate …
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A high performance dielectric measurement system
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
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