W. Graf

Helmholtz-Zentrum Berlin für Materialien und Energie

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K. M. Price

Ford Motor Company (United States)

E. F. Vance

Fort Worth Library

R. N. Bracewell

Stanford University

C. J. Crannell

Goddard Space Flight Center

B. R. Dennis

Canadian Blood Services

M. J. Coe

University of Southampton

J. F. Dolan

University of Iowa

G. Maurer

Centre National de la Recherche Scientifique

S. J. Wernecke

Stanford University

K. J. Frost

Goddard Space Flight Center

Cooperative Institutions

Helmholtz-Zentrum Berlin für Materialien und Energie

Infineon Technologies (Germany)

Goddard Space Flight Center

Stanford University

National Radio Astronomy Observatory

California Institute of Technology

Siemens (Germany)

Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute

Centre National de la Recherche Scientifique

GlobalFoundries (Germany)

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Periodic brightness fluctuations of the solar chromosphere at lambda = 2.8 centimeters

The Astrophysical Journal (1979)

W. Graf S. J. Wernecke C. J. Grebenkemper

view Abstract Citations (6) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Periodic brightness fluctuations of the solar chromosphere at lambda = 2.8 centimeters. Graf, W. ; Grebenkemper, C. J. ; Wernecke, S. J. Abstract A description is presented of observations of the sun near the spring equinox in 1975 and 1976, and near the fall equinox in 1976. The observations were made with the aid of a five-element interferometer. A prominent phenomenon regarding the velocity field of the photosphere is considered. This phenomenon is related to an oscillatory fluctuation with a 5 minute temporal period, associated with a scale size of about 1 to 10 arcseconds. The question of whether the 5 minute oscillations are a significant source of heating of the chromosphere and corona does not appear to be settled. There is no doubt that brightness fluctuations exist in both chromosphere and corona, but they do not appear to have an oscillatory nature. Publication: The Astrophysical Journal Pub Date: February 1979 DOI: 10.1086/156848 Bibcode: 1979ApJ...228..312G Keywords: Brightness; Chromosphere; Radio Astronomy; Solar Oscillations; Power Spectra; Solar Atmosphere; Solar Physics; Oscillations:Sun; Radio Radiation:Solar Chromosphere; Solar Radio Radiation:Fluctuations full text sources ADS |

Chromosphere

Photosphere

Corona (planetary geology)

Coronal radiative losses

10.1086/156848

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Citations (4)

The Effect of Terminations on Coupling to Wires and Pairs

E. F. Vance W. Graf Joachim M. Hamm

10.23919/emc.1983.10879529

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The height of 9.1 cm solar emission from latitude shift

Solar Physics (1973)

W. Graf R. N. Bracewell

Longitude

Geographic coordinate system

Atmospheric refraction

10.1007/bf00152314

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Citations (8)

Fine Structure in Galactic H II Regions at 10.7 GHz

Bulletin of the American Astronomical Society (1976)

K. M. Price W. Graf

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System Design: Practical Shielding and Grounding Techniques Based on Electromagnetic Topology

Springer eBooks (1986)

W. Graf

10.1007/978-94-017-0445-8_19

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Citations (1)

Synoptic maps of solar 9.1 cm microwave emission from June 1962 to August 1973

Unknown eBooks (1975)

W. Graf R. N. Bracewell

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Citations (1)

High energy X-ray and radio studies of Scorpius X-1

The Astrophysical Journal (1980)

M. J. Coe B. R. Dennis J. F. Dolan C. J. Crannell K. J. Frost

view Abstract Citations (9) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS High energy X-ray and radio studies of Scorpius X-1. Coe, M. J. ; Dennis, B. R. ; Dolan, J. F. ; Crannell, C. J. ; Maurer, G. S. ; Frost, K. J. ; Orwig, L. E. ; Graf, W. ; Price, K. M. Abstract The results from extended high energy X-ray observations of Scorpius X-1 from the OSO 8 satellite are reported. The source was observed for a total of 15 days in 1975, 1977, and 1978. Simultaneous 10.7 GHz and 4.75 GHz radio data were obtained during the 1978 observation, and low energy X-ray data during the 1975 and 1978 observations. Detailed studies of the data reveal a lack of any correlation between the high energy X-rays and the other energy ranges. A 3 sigma upper limit of 22% was obtained for any modulation of the high energy flux with the binary period. No high energy tail was observed at any time. Publication: The Astrophysical Journal Pub Date: April 1980 DOI: 10.1086/157853 Bibcode: 1980ApJ...237..148C Keywords: Binary Stars; Oso-8; Radio Waves; Scorpius Constellation; Stellar Spectrophotometry; X Ray Sources; Periodic Variations; Radiant Flux Density; Spectrum Analysis; X Ray Spectra; Astrophysics full text sources ADS | data products SIMBAD (1)

Spectral energy distribution

10.1086/157853

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Citations (4)

Unification of Electromagnetic Specifications and Standards, Part I- Evaluation of Existing Practices

E. F. Vance W. Graf J. E. Nanevicz

Abstract : To establish a basis for evaluating standards, specifications, and codes by which electronic equipment and systems are procured and installed, a review of electromagnetic interference control has been made. It is concluded that effective interference control is achieved by establishing an impervious barrier between the offending source and the circuit to be protected. This concept is developed and applied to practical control requirements for equipment and facilities. Over 70 standards, specifications, and codes have been reviewed to assess where they are incompatible with these principles. It is postulated that a set of documents compatible with each other and with requirements for electromagnetic pulse (EMP) hardening, interference control, and communications security can be developed. This report documents Phase I of this project which was limited to the development of a general interference control model and its application to the review of existing standards and practices. In Phase II alternatives to the incompatible requirements found during the review will be developed and demonstrated.

Unification

10.21236/ada121700

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Citations (6)

and advanced CMOS logic

H. Wurzer W. Graf G. Curello J. Fad Dennis Weber

A new 0.17pm embedded DRAM (eDRAM) technology is presented. Basing on a DRAM process with a cell size of 0.23 pm2 CMOS logic has been improved by introducing a new isolation concept called deep trench isolation and an aggressive device scaling. This is completed by a 6-level AlCu RIE metalization. This concept enables a system-on-achip (SOC) solution up to several hundred Mbits DRAM capacity on smallest chip size and highest yield perspectives.

Dram

Shallow trench isolation

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Study of the brightness and polarization structure of extragalactic radio sources

The Astronomical Journal (1975)

M. A. Stull K. M. Price Larry R. D’Addario S. J. Wernecke W. Graf

The brightness and linear-polarization structure of 19 extended extragalactic radio sources are determined at a frequency of 10.7 GHz. Compact components with self-absorption spectra coincident with the nucleus of an associated galaxy are fairly common, while many sources display regions of high-percentage polarization, sometimes greater than 40%. Comparison of our results with other studies, all at lower frequencies (generally not exceeding 5 GHz), has yielded information on spectra, depolarization rates, and Faraday rotation of the polarization plane in various source regions. At least four distinct classes of extragalactic radio sources are identified. These classes form a sequence along which the prominence of the compact central component declines relative to that of the extended outer regions, while those outer regions become more ordered in their structure and assume specific polarization characteristics. It is suggested that this sequence is in fact an evolutionary sequence.

10.1086/111779

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Citations (7)