Results 101 to 110 of about 124,588 (288)
Atmospheric Timing Transfer Using a Femtosecond Frequency Comb
IEEE Photonics Journal, 2010 We have experimentally demonstrated atmospheric transfer of microwave timing references using a femtosecond frequency comb. The excess timing jitter induced by the atmospheric propagation has been characterized, and evidence is provided to show that such
Ravi P. Gollapalli, Lingze Duan
doaj +1 more source
Journal of Physics: Conference SeriesAbstract The International Celestial Reference Frame (ICRF) plays an important role in astronomy and geodesy. The realization of ICRF is based on the position of thousands of quasars observed using the Very-Long Baseline Interferometry (VLBI) technique. Better quality of ICRF is achieved when the position of the quasars is stable.
Muthmaina, Jessica Syafaq +2 more
openaire +2 more sources
Methane Generation Using an Anaerobic Biodigester From Waste Leachate Water
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Leachate wastewater (LWW) is characterized by slow biodegradation and low biogas production due to resistant materials and limited biological activity. Therefore, applying pretreatments is essential to improving biodegradation potential, which consequently boosts energy recovery.
Khairi R. Kalash +5 more
wiley +1 more source
Stabilized
IEEE Photonics Journal, 2017 We have designed and fabricated a Kerr frequency comb oscillator with 27.5 GHz repetition rate by pumping a whispering gallery mode crystalline resonator with a laser at 1560 nm center wavelength. The oscillator is stabilized to the Rb$^{87}
Wei Liang +5 more
doaj +1 more source
IMPLEMENTATION OF TWO TELEMETER DESIGNS FOR HIGH ACCURACY LASER RANGING OF KILOMETER SCALE DISTANCES IN SPACE [PDF]
, 2010 We present two different laser ranging systems under development, both based on the use of a high frequency modulated beam. The first range meter makes no use of interferometry: only the phase of the return beam is detected, in a way that rejects cyclic ...
Brillet, Alain +3 more
core +2 more sources
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT A specific microporous KOH/activated‐biochar (K/BC) was produced from a blend of date stones (DS) and walnut shells (WS) and used in the adsorptive desulfurization (ADS) of two types of model fuel DBT/n‐hexane (S‐hex), DBT/cyclohexane (S‐cyclohex).
Ameen L. Alyawer +4 more
wiley +1 more source
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Drilling fluids used in high‐performance well operations often struggle to maintain rheological stability, colloidal dispersion, and filtration control under harsh downhole conditions. This study engineered a multifunctional Fe3O4@Saponin/Cu(II) nanocomposite to address these challenges.
Kassem Al Attabi +9 more
wiley +1 more source
Performance of a 12-GHz fiber-optic system for beam-waveguide antenna stability testing [PDF]
, 1992 A 12-GHz fiber-optic system is a critical part of a test configuration that was proposed for measuring the fractional frequency stability of the Deep Space Station (DSS)-13 beam-waveguide (BWG) antenna.
Franco, M. M. +2 more
core +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Satellite remote sensing is among the most significant modern methodologies supporting field archaeology. In addition to its efficiency in identifying archaeological sites, remote sensing offers a safe and cost‐effective approach in conflict zones.
Amal Al Kassem +5 more
wiley +1 more source
Arthritis &Rheumatology, EarlyView.Objective The objective of the study was to determine risk factors for relapse of antineutrophil cytoplasmic antibody (ANCA)–associated vasculitis (AAV) after reinduction of remission with rituximab and discontinuation of maintenance therapy. Methods This is a post hoc analysis of the RITAZAREM clinical trial.
Ellen Romich +62 more
wiley +1 more source