WorldCat Identities

Michael, E. (Ernest) 1925-

Overview
Works: 12 works in 46 publications in 3 languages and 305 library holdings
Roles: Author
Publication Timeline
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Most widely held works by E Michael
Locally multiplicatively-convex topological algebras by E Michael( Book )

26 editions published between 1951 and 1971 in English and Undetermined and held by 228 WorldCat member libraries worldwide

A-spaces and countably bi-quotient maps by E Michael( Book )

8 editions published in 1976 in English and held by 59 WorldCat member libraries worldwide

A-spaces and countably bi-quotient maps by E Michael( Book )

2 editions published in 1976 in Polish and held by 9 WorldCat member libraries worldwide

A-spaces and countably bi-quotient maps by E Michael( Book )

2 editions published in 1976 in English and held by 2 WorldCat member libraries worldwide

DENSE FAMILIES OF CONTINUOUS SELECTIONS( Book )

1 edition published in 1957 in English and held by 1 WorldCat member library worldwide

Free-electron THz-reabsorption in distributed photodiode structures( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Abstract Ultra-fast photodiodes based on vertical p–i–n or uni-traveling (UTC) mesa structures require a highly doped base layer that makes a well-conducting transverse connection between the mesa bottom layer and the bottom metal contacts. To reach the lowest possible THz loss, the question arises on what doping levels would be optimal for this layer. Doping levels of up to ≈5×1019 ?> cm−3 can be reached in InP, corresponding to conductivities of around 8×105 ?> S m−1, which is still much lower than those of metal conductors. A full-wave analysis, which is executed in HFSS™ and CST Microwave Studio™ and reported here, shows that a valley of low loss exists around a conductivity of 5×104 ?> S m−1 (estimated doping value ≈2×1018 ?> cm−3), in the middle of a conductivity range of excessive terahertz absorption, making this value the best choice for the whole frequency range up to 2000 GHz. The results are supported by an analytical solution in a simplified transmission line model. The results are expected to be significant for designing future distributed photonic devices such as traveling-wave (TW) photodiodes
Locally m-convex algebras by E Michael( )

1 edition published in 1951 in English and held by 1 WorldCat member library worldwide

Frosch Robi und der Edelstein Ein Märchen by Michael Ernst( Book )

in German and held by 1 WorldCat member library worldwide

INTERSECTION IN CARTESIAN PRODUCTS( Book )

1 edition published in 1960 in English and held by 1 WorldCat member library worldwide

PARACONVEX SETS( Book )

1 edition published in 1958 in English and held by 1 WorldCat member library worldwide

Control of deviations and prediction of surface roughness from micro machining of THz waveguides using acoustic emission signals( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Abstract: By using acoustic emission (AE) it is possible to control deviations and surface quality during micro milling operations. The method of micro milling is used to manufacture a submillimetre waveguide where micro machining is employed to achieve the required superior finish and geometrical tolerances. Submillimetre waveguide technology is used in deep space signal retrieval where highest detection efficiencies are needed and therefore every possible signal loss in the receiver has to be avoided and stringent tolerances achieved. With a sub-standard surface finish the signals travelling along the waveguides dissipate away faster than with perfect surfaces where the residual roughness becomes comparable with the electromagnetic skin depth. Therefore, the higher the radio frequency the more critical this becomes. The method of time-frequency analysis (STFT) is used to transfer raw AE into more meaningful salient signal features (SF). This information was then correlated against the measured geometrical deviations and, the onset of catastrophic tool wear. Such deviations can be offset from different AE signals (different deviations from subsequent tests) and feedback for a final spring cut ensuring the geometrical accuracies are met. Geometrical differences can impact on the required transfer of AE signals (change in cut off frequencies and diminished SNR at the interface) and therefore errors have to be minimised to within 1 µm. Rules based on both Classification and Regression Trees (CART) and Neural Networks (NN) were used to implement a simulation displaying how such a control regime could be used as a real time controller, be it corrective measures (via spring cuts) over several initial machining passes or, with a micron cut introducing a level plain measure for allowing setup corrective measures (similar to a spirit level). Highlights: Different levels of each phenomenon in terms of acoustic emission (AE) correlated to deviation were characterised. Physical phenomena using both the time and frequency domain analysis of the AE were gained from the vertical-axis micro milling tests. Significant tool wear of micro milling was characterised after and before the onset of tool malfunction. Different levels of the characterised phenomena were classified for the prediction of surface quality. A real-time simulation displaying changing energy patterns as deviation errors increase/decrease was implemented
Eastland company in the reign of Elizabeth by E Michael( Book )

1 edition published in 1925 in English and held by 0 WorldCat member libraries worldwide

 
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Audience level: 0.73 (from 0.70 for Locally mu ... to 1.00 for Eastland c ...)

Alternative Names
Ernest Michael Amerikaans wiskundige (1925-2013)

Ernest Michael amerikansk matematikar

Ernest Michael amerikansk matematiker

Ernest Michael matemàtic estatunidenc

Ernest Michael matemático estadounidense

Ernest Michael matematico statunitense

Ernest Michael mathématicien américain

Ernest Michael US-amerikanischer Mathematiker

Michael, E.

Michael, E. A.

Michael, Ernest.

Michael, Ernest 1925-

Michael, Ernest A.

ارنست مایکل ریاضی‌دان آمریکایی

Languages
English (42)

Polish (2)

German (1)