Permeability Profiling of Rock Cores Using a Novel Spatially Resolved NMR Relaxometry Method: Preliminary Results From Sandstone and Limestone

2019 ◽  
Vol 124 (5) ◽  
pp. 4601-4616 ◽  
Author(s):  
Huabing Liu ◽  
Lizhi Xiao ◽  
Fangrong Zong ◽  
Marcel Nogueira d'Eurydice ◽  
Petrik Galvosas
Keyword(s):  
Preliminary Results ◽  
Spatially Resolved ◽  
Nmr Relaxometry ◽  
Rock Cores

scholarly journals Preliminary Results on Irradiance Measurements from Lyra and Swap

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
S. T. Kumara ◽  
R. Kariyappa ◽  
M. Dominique ◽  
D. Berghmans ◽  
L. Damé ◽  
...  
Keyword(s):  
High Temporal Resolution ◽  
Preliminary Results ◽  
Spatially Resolved ◽  
Large Yield ◽  
Active Pixel ◽  
Integrated Intensity ◽  
Actual Contribution ◽  
The Individual ◽  
Aluminum Filter ◽  
Full Disk

The first and preliminary results of the photometry of Large Yield Radiometer (LYRA) and Sun Watcher using Active Pixel system detector and Image Processing (SWAP) onboard PROBA2 are presented in this paper. To study the day-to-day variations of LYRA irradiance, we have compared the LYRA irradiance values (observed Sun as a star) measured in Aluminum filter channel (171 Å–500 Å) with spatially resolved full-disk integrated intensity values measured with SWAP (174 Å) and Ca II K 1 Å index values (ground-based observations from NSO/Sac Peak) for the period from 01 April 2010 to 15 Mar 2011. We found that there is a good correlation between these parameters. This indicates that the spatial resolution of SWAP complements the high temporal resolution of LYRA. Hence SWAP can be considered as an additional radiometric channel. Also the K emission index is the integrated intensity (or flux) over a 1 Å band centered on the K line and is proportional to the total emission from the chromosphere; this comparison clearly explains that the LYRA irradiance variations are due to the various magnetic features, which are contributing significantly. In addition to this we have made an attempt to segregate coronal features from full-disk SWAP images. This will help to understand and determine the actual contribution of the individual coronal feature to LYRA irradiance variations.

Spatially Resolved T 1 Relaxation Measurements of Brine in Rock Cores

1990 ◽  
pp. 115-115
Author(s):  
J. J. Attard ◽  
T. A. Carpenter ◽  
L. D. Hall ◽  
P. A. Osment ◽  
K. J. Packer ◽  
...  
Keyword(s):  
Spatially Resolved ◽  
Rock Cores ◽  
Relaxation Measurements

Effect of a range of microbial polysaccharides on the diffusion of manganese ions using spatially resolved NMR relaxometry

2001 ◽  
Vol 28 (4-5) ◽  
pp. 370-375 ◽  
Author(s):  
T.D Hart ◽  
R.J Hill ◽  
P.M Glover ◽  
J.M Lynch ◽  
A.H.L Chamberlain
Keyword(s):  
Manganese Ions ◽  
Spatially Resolved ◽  
Nmr Relaxometry

Probing Dynamics and Wettability of Water and Oil in Conventional and Unconventional Sandstone Rock Cores by Field-Cycling NMR Relaxometry

2019 ◽  
Vol 33 (11) ◽  
pp. 10583-10592 ◽  
Author(s):  
Feng Zhu ◽  
Wenxuan Hu ◽  
Jian Cao ◽  
Gianni Ferrante ◽  
Moreno Pasin ◽  
...  
Keyword(s):  
Nmr Relaxometry ◽  
Rock Cores ◽  
Sandstone Rock ◽  
Field Cycling

scholarly journals High Angular Resolution Studies of Stellar Atmospheres

2001 ◽  
Vol 205 ◽  
pp. 288-295 ◽  
Author(s):  
Chris A. Haniff
Keyword(s):  
Angular Resolution ◽  
Stellar Atmospheres ◽  
High Angular Resolution ◽  
Preliminary Results ◽  
Spatially Resolved ◽  
Long Baseline ◽  
Short Baselines ◽  
Limited Sensitivity ◽  
Spatially Resolved Studies

The advent of long-baseline optical and infrared interferometers has meant that spatially resolved studies of stellar atmospheres have now become routinely possible. While prototype arrays, which have typically operated with short baselines and limited sensitivity, have produced exciting preliminary results, it is the development of larger dedicated facility arrays, such as the CHARA, Keck, and VLT interferometers, that offer the best prospects for advancing astrophysics. In this paper I review the possibilities and limitations of interferometric studies of stellar atmospheres, and highlight some recent results from optical/IR spatial interferometry.

scholarly journals BBXRT Observations of Supernova Remnants

1992 ◽  
Vol 9 ◽  
pp. 229-233
Author(s):  
R. Petre ◽  
P. J. Serlemitsos ◽  
F. E. Marshall ◽  
K. Jahoda ◽  
E. A. Boldt ◽  
...  
Keyword(s):  
Spectral Resolution ◽  
Simultaneous Measurement ◽  
Supernova Remnants ◽  
Preliminary Results ◽  
Spatially Resolved ◽  
Spatially Resolved Spectroscopy

AbstractThe BBXRT observed nine supernova remnants during its nine-day flight. We present preliminary results from some of these observations, emphasizing the ability of BBXRT to perform spatially resolved spectroscopy. The improved spectral resolution and efficiency over previous instruments makes possible measurements of previously undetectable lines, and the broad bandpass allows simultaneous measurement of lines from oxygen through iron.

scholarly journals Mapping the structure and source of outflows from star-forming galaxies at z = 2 – 3

2019 ◽  
Vol 15 (S352) ◽  
pp. 268-268
Author(s):  
Bethan James
Keyword(s):  
Absorption Line ◽  
Wavelength Range ◽  
Gravitational Lensing ◽  
Rest Frame ◽  
Uv Spectra ◽  
Star Forming ◽  
Preliminary Results ◽  
Fundamental Properties ◽  
Spatially Resolved

AbstractAs we enter the era of JWST our need to characterise the rest-frame UV spectra of star-forming galaxies becomes essential. By combining the NIR capabilities of JWST with our understanding of UV wavelength science, we have the opportunity to explore fundamental properties of the gas, such as its metallicity and density, as well as the extent, velocity, and magnitude of their outflowing gas, in galaxies out to z ∼ 6. Galaxy outflows in particular play a fundamental role in the evolution of young galaxies at high redshifts, but their properties remain largely unknown as it is difficult to spatially resolve the outflowing gas. To-date, only two attempts to resolve outflows at redshift ∼ 2 have been made using lensing magnification, producing contradictory results on the origin of the outflows. In this talk I will present results from one such groundbreaking study where we combine gravitational lensing with VLT-MUSE to perform one of the first spatially resolved absorption line studies of a galaxy at z = 2 – 3. I will discuss how the the distinct kinematical structure and uniform column densities obtained from the outflowing gas maps reveal ‘global’ rather than ‘locally’ sourced outflows. I will also present preliminary results from our latest attempt to accurately constrain the structure and source of outflows in star-forming galaxies by observing the brightest galaxy-scale lens known with KCWI. I will conclude with the benefits and limitations of spatially resolved observations in this wavelength range, and possible implications on NIRSpec observations of the high-z Universe.

Multistatic meteor radar observations to assess the spatial variability of mesospheric/lower thermospheric winds using a 3DVAR+div tomographic retrieval to measure spatially resolved 3D winds 

2021 ◽  
Author(s):  
Gunter Stober ◽  
Alexander Kozlovsky ◽  
Alan Liu ◽  
Zishun Qiao ◽  
Masaki Tsutsumi ◽  
...  
Keyword(s):  
Vertical Wind ◽  
Spatial And Temporal Variability ◽  
Meteor Radar ◽  
Mean Flow ◽  
Radar Observations ◽  
Preliminary Results ◽  
Spatially Resolved ◽  
Wind Variability ◽  
Thermospheric Winds ◽  
Energy And Momentum

<p>The middle atmospheric circulation is driven by atmospheric waves, which carry energy and momentum from their source to the area of their dissipation and thus providing an energetic coupling between different atmospheric layers. A comprehensive understanding of the wave-wave or wave-mean flow interactions often requires a spatial characterization of these waves. Multistatic meteor radar observations provide an opportunity to investigate the spatial and temporal variability of mesospheric/lower thermospheric winds on regional scales. We apply the 3DVAR+div retrievals to observations from the Nordic Meteor Radar Cluster and the Chilean Observation Network De Meteor Radars (CONDOR). Here we present preliminary results of a new 3DVAR+div retrieval to infer the vertical wind variability using spatially resolved observations. The new retrieval includes the continuity equation in the forward model to ensure physical consistency in the vertical winds. Our preliminary results indicate that the vertical wind variability is about +/-2m/s. The 3DVAR+div algorithm provides spatially resolved winds resolves body forces of breaking gravity waves, which are typically indicated by two counterrotating vortices. Furthermore, we infer horizontal wavelength spectra for all 3 wind components to obtain spectral slopes indicating a transition of the vertical to the divergent mode at scales of about 80-120 km at the mesosphere.</p>

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