WorldCat Identities

Hoffman, J. R. (J. Randy)

Overview
Works: 19 works in 34 publications in 1 language and 2,418 library holdings
Genres: Sermons 
Roles: Author
Classifications: TK6553, 621.38418
Publication Timeline
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Most widely held works by J. R Hoffman
Implementation and testing of a software defined radio cellular base station receiver [microform] by J. A Wepman( )

3 editions published in 2001 in English and Undetermined and held by 385 WorldCat member libraries worldwide

Field strength measurements of DGPS and FAA beacons in the 285- to 325-kHz band by J. R Hoffman( )

2 editions published in 1997 in English and held by 357 WorldCat member libraries worldwide

Measurements to characterize land mobile channel occupancy for federal bands 162-174 MHz and 406-420 MHz in the Denver, CO area by John E Carroll( )

2 editions published in 2008 in English and held by 225 WorldCat member libraries worldwide

Measurements to characterize land mobile channel occupancy for federal bands 162-174 MHz and 406-420 MHz in the Washington, D.C., Area by J. R Hoffman( )

1 edition published in 2007 in English and held by 215 WorldCat member libraries worldwide

Measurements to determine potential interference to Public safety radio receivers from ultrawideband transmission systems by J. R Hoffman( )

3 editions published in 2003 in English and held by 213 WorldCat member libraries worldwide

Addendum to NTIA Report 01-384 : measurements to determine potential interference to GPS receivers from ultrawideband transmission systems( )

1 edition published in 2001 in English and held by 195 WorldCat member libraries worldwide

Resolving interference from an airport surveillance radar to a weather radar by Frank H Sanders( )

3 editions published in 2006 in English and held by 195 WorldCat member libraries worldwide

In response to interference from an S-band (2700-2900 MHz) airport surveillance radar (ASR) to a meteorological (weather) radar in the same band, measurements were performed at the field location of the two radars to determine the interference mechanism and any possible mitigation options. Measurements included emission spectra of the ASR and observations of the interference energy in the RF front-end and IF stages of the weather radar. Measurement results showed that interference energy originated in the unwanted emissions of the ASR (i.e., front-end overload was not occurring in the weather radar). But the problem was exacerbated by the placement of a passive diode limiter ahead of a bandpass filter in the weather radar receiver's RF front-end. The interference could not be mitigated unless the front-end configuration of the weather radar was modified. With the necessary modification completed, the interference was successfully mitigated by installing a conventional notch filter on the ASR's output stage, the notch being tuned to the weather radar frequency. It is recommended that the front-end configuration of all weather radars of the type in question should be immediately changed in the same way as the weather radar in this study, and that appropriate output filters should be installed in ASRs that are located in close proximity to these weather radars to mitigate interference effects at all sites in the U.S
RF and IF digitization in radio receivers : theory, concepts, and examples by J. A Wepman( Book )

4 editions published in 1996 in English and held by 161 WorldCat member libraries worldwide

DGPS field strength measurements at a GWEN site by J. R Hoffman( Book )

2 editions published in 1998 in English and held by 156 WorldCat member libraries worldwide

Measurements to determine potential interference to GPS receivers from ultrawideband transmission systems( Book )

2 editions published in 2001 in English and held by 155 WorldCat member libraries worldwide

Impulse response measurements in the 1850-1990 MHz band in large outdoor cells by J. A Wepman( Book )

1 edition published in 1994 in English and held by 149 WorldCat member libraries worldwide

Site selection plan and installation guidelines for a nationwide differential GPS system by Ronald L Ketchum( Book )

1 edition published in 1997 in English and held by 2 WorldCat member libraries worldwide

L'estasi by J. R Hoffman( )

2 editions published in 1867 and held by 2 WorldCat member libraries worldwide

Mignonette schottisch by J. R Hoffman( )

2 editions published in 1867 and held by 2 WorldCat member libraries worldwide

Postlarval chromatophores as an adaptation to ultraviolet radiation by B. G MINER( )

1 edition published in 2000 in English and held by 2 WorldCat member libraries worldwide

Program generator for finite-rate chemical systems( Book )

1 edition published in 1966 in English and held by 1 WorldCat member library worldwide

A system (generator program) is described which automatically generates a subroutine (generated program) to perform thermodynamic, transport, and chemical kinetic calculations for any species and reactions of interest. The FORTRAN 4 subroutine is generated as a deck of source cards which may be compiled; the resulting object deck is then inserted into an aerothermodynamics (users) program. (Author)
Ternary phase equilibria in transition metal-boron-carbon-silicon systems. part i. related binary systems. volume xi. final report on the mo-c system( Book )

1 edition published in 1967 in English and held by 1 WorldCat member library worldwide

The binary alloy system molybdenum-carbon was investigated by means of X-ray, metallographic, thermoanalytical, and melting point techniques on chemically analyzed specimens. The system is characterized by three congruently melting, intermediate phases, Mo2C, Eta-MoC(1-x), and Alpha-MoC(1-x), of which only Mo2C is stable at temperatures below 1650 C. Substoichiometric (is greater than 32.5 At% C) dimolybdenum carbide undergoes a homogeneous sublattice order-disorder transformation at temperatures of approximately 1400 C, whereas hyperstoichiometric compositions undergo a discontinuous phase-change. The order-disorder transitions in the Me2C phases are discussed in terms of the structural changes involved in the transformation processes and the absence of long range sublattice coherency in stoichiometric or hyperstoichiometric compositions attributed to the impossibility of obtaining long range order in a linear chain of alternating carbon atoms and vacancies. From the experimental phase relationships and the known thermodynamic data for Mo2C, limits for the free energies of formation for the high temperature phases Eta-MoC(1-x) and Alpha-MoC(1-x) are derived and found to be in good agreement with data previously obtained from phase equilibria in ternary metal-carbon systems. (Author)
The faith of Jesus by J. R Hoffman( Visual )

1 edition published in 1975 in English and held by 1 WorldCat member library worldwide

Out-of-hospital cervical spine immobilization : making policy in the absence of definitive information by J. R Hoffman( )

1 edition published in 2001 in English and held by 1 WorldCat member library worldwide

 
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Audience level: 0.51 (from 0.47 for Measuremen ... to 0.99 for Ternary ph ...)

Languages
English (29)