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REPEAT - OSTI GOV

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Last Updated: 20 June 2022

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Searching for gravitational waves with strongly lensed repeating fast radio bursts

"A new generation of radio telescopes with large fields of view have enabled a rapid accumulation of FRB measurements, confirming that FRBs originate from cosmological distances. " An extremely accurate timing of burst arrival times is possible for strongly lensed repeating FRBs, and we'll explore how this timing precision allows the search for long-wavelength gravitational waves, including those derived from supermassive black hole binary systems. The timing of burst arrival for strongly lensed repeating FRBs is particularly sensitive to gravitational-wave sources near the FRB host galaxy, which may be extremely difficult to detect by other means. Timing of pronouncedly focused FRBs can also be used with pulsar timing array results to search for correlated time delays characteristic of gravitational waves passing through the Earth.

Source link: https://www.osti.gov/biblio/1851334


Does repeat synthesis in materials chemistry obey a power law?

"Our results show that a power law describes the frequency of repeat synthesis of several MOFs, but that a small number of u201csupermaterials#u201d exist that have been reproduced many times more than a power law," says the author. Our findings also reveal that there are several repeat syntheses that have been carried out but not reported in the literature, which means that simple actions can be taken to greatly raise the number of reports of replicate experiments in materials chemistry. ".

Source link: https://www.osti.gov/biblio/1625062


Using Near-Infrared-Enabled Digital Repeat Photography to Track Structural and Physiological Phenology in Mediterranean Tree–Grass Ecosystems

"The use of repeated digital photographs for plant phenology monitoring opens avenues for long-term plant phenology monitoring and determining phenological transition dates. At four tree-u2013grass Mediterranean sites, we intend to assess the use of PhenoCam, a near-infrared-enabled product for monitoring phenology and physiology. We extracted four vegetation indexes from PhenoCams: green chromatic coordinates, normalized difference vegetation index, near-infrared representation of vegetation index, and ratio vegetation index. The GPP is derived from eddy covariance flux tower measurements. In addition, CamNIRv outperforms the other Vis in monitoring growing season lengths of GPP. ".

Source link: https://www.osti.gov/biblio/1499900


A Variable Polyglutamine Repeat Affects Subcellular Localization and Regulatory Activity of a Populus ANGUSTIFOLIA Protein

Both subcellular compartments were shown to have localization in both subcellular compartments, according to the 11Q variant, which was only detected in the cytosol, while the 15Q variant was only found in the cytosol. We investigated functional consequences by evaluating expression changes of putative PtAN1 targets in reaction to overexpression of the three allelic variants' overexpression and discovered allele-specific variations in expression levels of putative targets. Variation in polyQ length modulates PtAN1 function, according to our findings, altering subcellular localization alters PtAN1 function.

Source link: https://www.osti.gov/biblio/1468119


Molecular analogue of the perovskite repeating unit and evidence for direct Mn III -Ce IV -Mn III exchange coupling pathway

"Further, magnetic experiments have shown that Ce 3 Mn 8 exhibits both the combination of pairwise Mn III 2 ferromagnetic and antiferromagnetic exchange interactions and the resulting spin vector alignments that are discovered within 3-D C-type antiferromagnetic perovskites. " Not only are the predicted nearest-neighbor Mn III 2 exchange couplings via superexchange pathways through bridging ligands, but also unusual, precise Mn III metal-to-metal channel involving the Ce IV f orbitals, according to the Ce IV f orbitals' estimates, but also unexpected, precise Mn III f orbitals. ".

Source link: https://www.osti.gov/biblio/1489401


Evaluating the potential of gold, silver, and silica nanoparticles to saturate mononuclear phagocytic system tissues under repeat dosing conditions

"Background: As nanoparticles become more popular in the pharmaceutical industry, industry and regulator concerns have arisen about the long-term effects of these substances. This research was conducted to determine whether gold, silver, or silica nanoparticles administered intravenously to mice for up to eight weeks in doses known to be safe and clinically toxic might result in significant bioaccumulation in liver and spleen macrophages. Although no toxicity was observed with gold and silver nanoparticles throughout the 8-week experiment, some silica nanoparticles' effects, including histopathological and serum chemistry changes, were apparent beginning at week 3. ".

Source link: https://www.osti.gov/biblio/1626913


Assimilation of repeated woody biomass observations constrains decadal ecosystem carbon cycle uncertainty in aggrading forests

"Overground states of forests can reveal details about aboveground states of forests, and this data can be used to determine carbon cycling in forests near to constant state. " We compare high-information content evaluations with retrievals using increasingly sparser remotely sensed data retrieved from local surveys. However, the sequestration of a particular carbon pool differs with assimilated biomass data. In all ecosystem C pools not just wood, not just wood, assimilation of repeated biomass observations reduces confusion and/or bias, as opposed to analyses using single or no stock data. As verification, our repeated biomass analysis shows that 78 percent of change in litter dynamics at one forest are within statistical uncertainty, while at the second forest total dead organic matter estimates are within observational uncertainty. When compared to studies with less biomass data, the uncertainty of retrieved ecosystem characteristics in the repeated biomass analysis has decreased by up to 50%.

Source link: https://www.osti.gov/biblio/1466301


Reviews and syntheses: Australian vegetation phenology: new insights from satellite remote sensing and digital repeat photography

"Phenology is the study of periodic biological events and can give important insight into the effect of climate variability and change on ecosystems. " Showing how satellite remote sensing and ground-based digital repeat photography can be used to expand phenology in Australian ecosystems. First, we investigate temporal variability in phenology on the continental scale using the improved vegetation index, which can be determined from MODerate resolution Imaging Spectroradiometer results. In four contrasting Australian ecosystems, we next use time series colour data retrieved from phenocam images to display a variety of phenological signatures. We also show how phenology contributes to ecosystem gross primary productivity, while not others, and how ecosystem gross primary productivity can be correlated in some ecosystems but not others. We conclude that phenocams have the ability to greatly expand the current knowledge of Australian ecosystems.

Source link: https://www.osti.gov/biblio/1580068

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions