The magnetic signatures of oceanic tides in satellite data: A virtual-observatory approach

2020 ◽  
Author(s):  
Jakub Velímský ◽  
Magnus D. Hammer ◽  
Christopher C. Finlay
Keyword(s):  
Harmonic Polynomial ◽  
Local Error ◽  
Virtual Observatory ◽  
Quiet Time ◽  
Local Approach ◽  
Initial Report ◽  
Polynomial Coefficients ◽  
Magnetic Signatures ◽  
Scalar Magnetic Potential ◽  
Oceanic Tides

<p>The magnetic signatures of the M<sub>2</sub>, and more recently also the N<sub>2</sub>, and O<sub>1</sub> oceanic tides have been successfully extracted from satellite observations (Grayver & Olsen, 2019). The traditional method uses the spatial representation of the tidal signals by spherical harmonics. Here we present an alternative approach based on the concept of virtual observatories, motivated by similar development in the analysis of the core field (Mandea & Olsen 2006). All quiet-time, night-side vector magnetic field values observed by the satellite(s) in the proximity of a selected virtual observatory are parameterized by a scalar magnetic potential represented by a cubic harmonic polynomial in a local Cartesian coordinate system. The time-dependence of the polynomial coefficients is constrained by selected tidal frequency, taking into account also the phase and amplitude corrections. The local approach offers several advantages over the use of the global spherical-harmonic base. The disturbances from external field in the polar areas have no impact on the inversion at lower latitudes, and local error estimates can be also provided. In this initial report, we will explore the possibilities of the new technique in terms of resolution, the combination of datasets from multiple satellites and the use of NS and EW field differences from the Swarm A-C pair.</p>

Prevalence of the pit and antipit in the genus Glycine

1987 ◽  
Vol 45 ◽  
pp. 986-987
Author(s):  
R. W. Yaklich ◽  
E. L. Vigil ◽  
W. P. Wergin
Keyword(s):  
Amino Acids ◽  
Endoplasmic Reticulum ◽  
Glycine Max ◽  
Seed Coat ◽  
Cell Types ◽  
Abaxial Surface ◽  
Legume Seed ◽  
Initial Report ◽  
Cone Cells ◽  
Glycine Max L

The legume seed coat is the site of sucrose unloading and the metabolism of imported ureides and synthesis of amino acids for the developing embryo. The cell types directly responsible for these functions in the seed coat are not known. We recently described a convex layer of tissue on the inside surface of the soybean (Glycine max L. Merr.) seed coat that was termed “antipit” because it was in direct opposition to the concave pit on the abaxial surface of the cotyledon. Cone cells of the antipit contained numerous hypertrophied Golgi apparatus and laminated rough endoplasmic reticulum common to actively secreting cells. The initial report by Dzikowski (1936) described the morphology of the pit and antipit in G. max and found these structures in only 68 of the 169 seed accessions examined.

Demonstration of Secondary Lysosomes in Bovine Megakaryocytes and Platelets Using Acid Phosphatase Cytochemistry with Cerium as a Trapping Agent

1990 ◽  
Vol 63 (01) ◽  
pp. 127-132 ◽  
Author(s):  
Michèle Ménard ◽  
Kenneth M Meyers ◽  
David J Prieur
Keyword(s):  
Acid Phosphatase ◽  
Electron Density ◽  
Golgi Complex ◽  
Initial Report ◽  
Cerium Phosphate ◽  
Virtual Absence ◽  
Phosphatase Cytochemistry ◽  
Secondary Lysosomes ◽  
Trapping Agent

SummaryThe ultrastructure of lysosomes from bovine megakaryocytes (MK) and platelets was characterized using acid phosphatase cytochemistry with beta-glycerophosphate as substrate and cerium as a trapping agent. The technique was easily reproducible; cerium-phosphate precipitates were uniform, readily visualized, and there was a virtual absence of nonspecific reaction product. Acid phosphatase was localized in the trans aspect of the Golgi complex and/or granules of less than 50 nm to 650 nm diameters in MK at all stages of maturation. Forty percent of the MK lysosomes contained inclusions of variable shapes, sizes and electron-density and were classified as secondary lysosomes. Twenty-four percent of the platelet sections contained acid phosphatase-positive granules. Fifty-four percent of these were secondary lysosomes. This is the initial report demonstrating secondary lysosomes in either resting MK or platelets using acid phosphatase cytochemistry. These findings suggest that MK and platelet lysosomes have an intracellular function in resting MK and platelets.

Autobiographies of Three Surviving Branch Davidians

2005 ◽  
Vol 1 (2) ◽  
pp. 165-197
Author(s):  
Catherine Wessinger
Keyword(s):  
Law Enforcement ◽  
Human Dimensions ◽  
Oral Histories ◽  
Initial Report ◽  
God's Will ◽  
Branch Davidians ◽  
The Bible ◽  
American Law ◽  
The Media ◽  
Federal Agents

This article provides an initial report on oral histories being collected from three surviving Branch Davidians: Bonnie Haldeman, the mother of David Koresh, Clive Doyle, and Sheila Martin. Their accounts are being made into autobiographies. Interviews with a fourth survivor, Catherine Matteson, are being prepared for deposit in an archive and inform the material gathered from Bonnie Haldeman, Clive Doyle, and Sheila Martin. Oral histories provided by these survivors humanize the Branch Davidians, who were dehumanized and erased in 1993 by the application of the pejorative ‘cult’ stereotype by the media and American law enforcement agents. These Branch Davidian accounts provide alternate narratives of what happened in 1993 at Mount Carmel Center outside Waco, Texas, to those provided by American federal agents, and flesh out the human dimensions of the community and the tragedy. Branch Davidians are differentiated from many other people primarily by their strong commitment to doing God's will as they understand it from the Bible. Otherwise they are ordinary, intelligent people with the same emotions, loves, and foibles as others.

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