Author: R. L. Komack
Publisher:
ISBN:
Category : Electric fields
Languages : en
Pages : 14
Book Description
Simultaneous Measurements and Spectral Analysis of Micropulsation Activity
Author: R. L. Komack
Publisher:
ISBN:
Category : Electric fields
Languages : en
Pages : 14
Book Description
Publisher:
ISBN:
Category : Electric fields
Languages : en
Pages : 14
Book Description
Photoelectric Yields for Oblique Incidence of Extreme Ultraviolet Radiation
Author: L. Heroux
Publisher:
ISBN:
Category : Photoemission
Languages : en
Pages : 12
Book Description
Publisher:
ISBN:
Category : Photoemission
Languages : en
Pages : 12
Book Description
Characteristic Wave Cataloguing for Ray Path Determination
Author: YĆ«ji Inoue
Publisher:
ISBN:
Category : Geomagnetism
Languages : en
Pages : 38
Book Description
Wave cataloguing suitable for ray tracing of a pulsed wave packet in a weakly-dissipative, horizontallystratified magnetoionic medium is described, Particular attention is devoted to the cataloguing of the various characteristic waves so that the influence of the local ionization density and collision frequency can be understood. The procedure presented is applicable under general incident conditions and complex refractive index surfaces. The Booker quartic equation is used to derive the unambiguous wave normals and wave identification is obtained from the dispersion equation. A modified CMA. diagram including collisions is illustrated. (Author).
Publisher:
ISBN:
Category : Geomagnetism
Languages : en
Pages : 38
Book Description
Wave cataloguing suitable for ray tracing of a pulsed wave packet in a weakly-dissipative, horizontallystratified magnetoionic medium is described, Particular attention is devoted to the cataloguing of the various characteristic waves so that the influence of the local ionization density and collision frequency can be understood. The procedure presented is applicable under general incident conditions and complex refractive index surfaces. The Booker quartic equation is used to derive the unambiguous wave normals and wave identification is obtained from the dispersion equation. A modified CMA. diagram including collisions is illustrated. (Author).
Asymptotic Solutions of Dipoles in a Semi-infinite Medium
Author: Kondagunta U. Sivaprasad
Publisher:
ISBN:
Category : Antennas (Electronics)
Languages : en
Pages : 62
Book Description
A theoretical analysis is made of the electromagnetic fields in two homogeneous media separated by a plane interface with a point source located in the denser medium. The solution is expressed in the form of integrals which cannot be evaluated explicitly. Asymptotic evaluations of the integrals have been made by many investigators using the saddlepoint technique. In the present work, all known asymptotic results are presented in one comprehensive form, using a modification of the method suggested by Lighthill for the asymptotic evaluation of the Fourier integrals. The regions of validity of the solutions are indicated wherever possible. The advantage of this method over others is its ease and simplicity. The present results agree term by term with the earlier ones of Banos and Wesley (1953-1954), and Paul (1959), who investigated the case of a source and receiver close to the interface, and an arbitrary location of source and receiver, respectively. The results obtained in the report are also compared with those of Stein (1955). (Author).
Publisher:
ISBN:
Category : Antennas (Electronics)
Languages : en
Pages : 62
Book Description
A theoretical analysis is made of the electromagnetic fields in two homogeneous media separated by a plane interface with a point source located in the denser medium. The solution is expressed in the form of integrals which cannot be evaluated explicitly. Asymptotic evaluations of the integrals have been made by many investigators using the saddlepoint technique. In the present work, all known asymptotic results are presented in one comprehensive form, using a modification of the method suggested by Lighthill for the asymptotic evaluation of the Fourier integrals. The regions of validity of the solutions are indicated wherever possible. The advantage of this method over others is its ease and simplicity. The present results agree term by term with the earlier ones of Banos and Wesley (1953-1954), and Paul (1959), who investigated the case of a source and receiver close to the interface, and an arbitrary location of source and receiver, respectively. The results obtained in the report are also compared with those of Stein (1955). (Author).
Earth-to-space Communications at Millimeter Wavelengths
Author: Edward E. Altshuler
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 46
Book Description
It is expected that with the exploration of outer space, a requirement for high data rate earth-to-space communication channels will arise. A program to investigate the feasibility of using the millimeter-wave region of the spectrum for this application is presented. The theory of atmospheric attenuation resulting from losses due to absorption, scattering and refraction processes is reviewed and used to estimate propagation losses produced by atmospheric gases, clouds and precipitation. Curves of total atmospheric attenuation and noise level as a function of meteorological parameters and antenna elevation angle are also presented. A series of experiments designed to obtain as much information as possible on the limitations imposed by the atmosphere on millimeter-wave propagation is considered. Although experiments using natural celestial bodies such as the sun, moon, planets and galaxies as radio sources are emphasized, those which would utilize aircraft, rockets and satellites are also mentioned. Finally, the characteristics of a recently installed precision 29-ft antenna designed to operate at 35 Gc (wavelength = 8.6 mm) with a traveling-wave maser as a preamplifier for the radiometer are outlined along with the specific experiments for which this antenna system will be used. (Author).
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 46
Book Description
It is expected that with the exploration of outer space, a requirement for high data rate earth-to-space communication channels will arise. A program to investigate the feasibility of using the millimeter-wave region of the spectrum for this application is presented. The theory of atmospheric attenuation resulting from losses due to absorption, scattering and refraction processes is reviewed and used to estimate propagation losses produced by atmospheric gases, clouds and precipitation. Curves of total atmospheric attenuation and noise level as a function of meteorological parameters and antenna elevation angle are also presented. A series of experiments designed to obtain as much information as possible on the limitations imposed by the atmosphere on millimeter-wave propagation is considered. Although experiments using natural celestial bodies such as the sun, moon, planets and galaxies as radio sources are emphasized, those which would utilize aircraft, rockets and satellites are also mentioned. Finally, the characteristics of a recently installed precision 29-ft antenna designed to operate at 35 Gc (wavelength = 8.6 mm) with a traveling-wave maser as a preamplifier for the radiometer are outlined along with the specific experiments for which this antenna system will be used. (Author).
Distortion of a Magnetic Field by the Motion of a Cylindrical Conductor
Author: Joseph G. Kelley
Publisher:
ISBN:
Category : Cylinders
Languages : en
Pages : 34
Book Description
Motion of a conductor relative to a magnetic field distorts the field. This paper considers a cylindrical slug moving in a two-dimensional magnetic field, represented by the vector potential A sub 0 theta, where the partial derivative of A sub 0 with respect to theta = 0. Maxwell's equations are solved for the distorted potential A theta in the form of a rapidly converging series A = & A sub n. The A sub n's are given in a form suitable for evaluation by a digital computer. The nonequivalence of the apparently analogous problem of a stationary slug in a time-varying field is noted and discussed. (Author).
Publisher:
ISBN:
Category : Cylinders
Languages : en
Pages : 34
Book Description
Motion of a conductor relative to a magnetic field distorts the field. This paper considers a cylindrical slug moving in a two-dimensional magnetic field, represented by the vector potential A sub 0 theta, where the partial derivative of A sub 0 with respect to theta = 0. Maxwell's equations are solved for the distorted potential A theta in the form of a rapidly converging series A = & A sub n. The A sub n's are given in a form suitable for evaluation by a digital computer. The nonequivalence of the apparently analogous problem of a stationary slug in a time-varying field is noted and discussed. (Author).
Characteristic Frequencies from Infrared and Elastic Data
Author: Johannes N. Plendl
Publisher:
ISBN:
Category : Dielectrics
Languages : en
Pages : 14
Book Description
Publisher:
ISBN:
Category : Dielectrics
Languages : en
Pages : 14
Book Description
Hydromagnetic Equilibrium and Toroidal (ring) Current Systems
Author: Marvin L. White
Publisher:
ISBN:
Category : Magnetohydrodynamic instabilities
Languages : en
Pages : 22
Book Description
Publisher:
ISBN:
Category : Magnetohydrodynamic instabilities
Languages : en
Pages : 22
Book Description
Two Phosphorescences and Electron Transfer in Dye-disulfhydryl Compound Complex
Author: Eiji Fujimori
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 16
Book Description
Mercaptoethanol and dimercaptopropanol form a complex with a cationic dye. Two dyes interacting with two SH groups in the complex with dimercaptopropanol exhibit two different absorptions and two different phosphorescences. Each one of them, present at a shorter wave length, corresponds to an absorption and a phosphorescence of the complex with mercaptoethanol. The dye-dimercaptopropanol complex is more photosensitive than the dye-mercaptoethanol complex. A phototropism observed in the former complex is based on an electron transfer.
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 16
Book Description
Mercaptoethanol and dimercaptopropanol form a complex with a cationic dye. Two dyes interacting with two SH groups in the complex with dimercaptopropanol exhibit two different absorptions and two different phosphorescences. Each one of them, present at a shorter wave length, corresponds to an absorption and a phosphorescence of the complex with mercaptoethanol. The dye-dimercaptopropanol complex is more photosensitive than the dye-mercaptoethanol complex. A phototropism observed in the former complex is based on an electron transfer.
Some Extremal Properties of the Dolph Array
Author: Charles J. Drane (Jr.)
Publisher:
ISBN:
Category : Antenna arrays
Languages : en
Pages : 30
Book Description
Publisher:
ISBN:
Category : Antenna arrays
Languages : en
Pages : 30
Book Description