Results 41 to 50 of about 153 (130)
An assessment of the accuracy of the VGOS geodetic products
, 2020 American Geophysical Union (AGU) Fall Meeting, 13-17 December 2021, New ...
Mondal, Dhiman +10 more
openaire +2 more sources
Investigating a continental Australian VGOS VLBI intensive for UT1-UTC determination
Earth, Planets and SpaceIn this simulation study, we investigate the potential performance of VLBI Intensives using the AuScope 12-metre VLBI network. This continental Australian network consisting of three stations, has recently been fully upgraded with VGOS receivers and has ...
Tiege McCarthy +2 more
doaj +1 more source
Molecularly Defined Lubricant Hydrocarbons from Olefin Metathesis
ChemCatChem, Volume 17, Issue 6, March 17, 2025.Hydrocarbon‐based lubricants are typically complex mixtures of branched molecules that are challenging to characterize and to relate to macroscopic properties. In this study, we report the synthesis and characterization of molecularly defined lubricants via olefin metathesis and hydrogenation.
Zachariah J. Berkson +9 more
wiley +1 more source
Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy
Engineering Reports, Volume 7, Issue 1, January 2025.The article presents the results of experimental studies of the efficiency of purification of model and real wastewater from dyeing and finishing industries using pneumatic flotation using an ozone‐air mixture instead of air and a combination of ultrasonic treatment and ozonation. ABSTRACT The article presents the results of experimental studies of the
Valentin Romanovski +6 more
wiley +1 more source
A Modular Approach for the Design of Quadruple Ridged Flared Horn Antenna Feeds
IEEE AccessThis paper presents the methodology followed for the design of a quad-ridged flared horn (QRFH) feed for the VLBI Global Observing System (VGOS) antennas.
Oscar Garcia-Perez +6 more
doaj +1 more source
Earth, Planets and SpaceIrregularities in the Earth’s rotation speed are quantified by the difference between Universal Time (UT1) and Coordinated Universal Time (UTC).
Arnab Laha +6 more
doaj +1 more source
Perspectives for Thermochemical Conversions of Lignocellulosic Biomass
Small, Volume 20, Issue 39, September 26, 2024.The status of the thermochemical conversion processes of lignocellulosic biomass within the areas of research and development is presented and discussed. A lot of insight and understanding related to the thermochemical conversion of lignocellulosic biomass is already gained, however, there are still a number of challenges and obstacles to be overcome ...
Michael Stöcker
wiley +1 more source
Prototype System for Unmanned Reference Point Determination at the Sub‐Millimeter Level
Earth and Space ScienceThe determination of reference points for telescopes is crucial for obtaining the local‐tie vector for a multi‐technology co‐located station. Traditional methods suffer from labor‐intensive fieldwork, long execution cycles, and systematic errors due to ...
Zhibin Zhang +7 more
doaj +1 more source
Mechanistic Insight into Heteroatom Removal from Vacuum Gas Oil Blended with PMMA or PET Waste
ChemSusChem, Volume 17, Issue 15, August 12, 2024.Examining Vacuum Gas Oil (VGO) and hydrocracking products blended with polymethylmethacrylate (PMMA) or polyethylene terephthalate (PET) reveals intricate oxygen, nitrogen, and sulfur removal pathways. Using advanced analytical methods, we elucidate the impact of the addition of oxygenated plastics on heteroatom‐removal reactions, establishing new ...
Naydu Zambrano +6 more
wiley +1 more source
Processing of resid–VGO mixtures in FCC: Laboratory approach
Applied Catalysis A: General, 2009 Fil: Devard, Alejandra Veronica. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Santa Fe. Instituto de Investigaciones en Catalisis y Petroquimica "Ing. Jose Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catalisis y Petroquimica "Ing.
Devard, Alejandra Veronica +3 more
openaire +2 more sources