Results 121 to 130 of about 2,377,761 (195)

Managing the radio spectrum : framework for reform in developing countries [PDF]

open access: yes
Bringing management of the radio spectrum closer to markets is long overdue. The radio spectrum is a major component of the infrastructure that underpins the information society.
Neto, Isabel, Wellenius, Bjorn
core  

Is re-farming the answer to the spectrum shortage conundrum? [PDF]

open access: yes, 2008
Radio spectrum has become one of the engines of economic growth. However, rapid technological change, ever increasing demands for new wireless services and the nature of spectrum as a scarce resource necessitate an urgent re-examination of issues such as
Curwen, Peter   +2 more
core  

Discovery of a ∼208 day Quasiperiodic Oscillation in the X-Ray Emission of the TeV Blazar 1ES 1959+650

open access: yesThe Astrophysical Journal
We report the discovery of a significant quasiperiodic oscillation (QPO) in the X-ray emission of the TeV blazar 1ES 1959+650 through a detailed timing analysis of long-term Swift X-ray Telescope data.
Bing-Kai Zhang, Min Jin, Peng Zong
doaj   +1 more source

The Ellis-Baldwin test. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Secrest NJ.
europepmc   +1 more source

Performance of the Sardinia Radio Telescope Using the Dual-Polarized Cryogenic C-Low Receiver in the 4.2-5.6 GHz Frequency Band. [PDF]

open access: yesSensors (Basel)
Schirru L   +16 more
europepmc   +1 more source

Multiwavelength analysis of the variability of the blazar 3C 273. [PDF]

open access: yesMon Not R Astron Soc, 2020
Fernandes S   +4 more
europepmc   +1 more source

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