Advances in Medical Imaging for Wound Repair and Regenerative Medicine

Ghosh, Biswajoy; Chatterjee, Jyotirmoy

doi:10.1007/978-981-19-6008-6_4

Cited by 5 publications

(3 citation statements)

References 118 publications

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“…However, as encountered in the case of the turbulent disk model, this formalism alone may not suffice as a global framework for the evolution of multiple-planet systems. The postnebular instabilities characteristic of this model are expected to occur efficiently and near-ubiquitously (Ghosh & Chatterjee 2023;Lammers et al 2023) such that only a few percent of systems would be expected to retain their initial resonant signatures (Goldberg & Batygin 2023), which lies in direct tension with the observed occurrence of near-resonant planetary configurations. While the achievement of nearresonant structures in such a formalism could thus occur primarily by chance following the epoch of instability (Goldberg & Batygin 2023), such near-resonant pairs would lose memory of their primoridal uniformity and lack any means of subsequent coordination in planetary size, disallowing the prospect of enhanced size uniformity altogether.…”

Section: Postnebular Dynamical Instabilities: Violent Disruption Of Mmrmentioning

confidence: 97%

Enhanced Size Uniformity for Near-resonant Planets

Goyal,

Dai,

Wang

2023

ApJ

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Super-Earths within the same close-in, compact planetary system tend to exhibit a striking degree of uniformity in their radius, mass, and orbital spacing, and this “peas-in-a-pod” phenomenon itself serves to provide one of the strongest constrains on planet formation at large. While it has been recently demonstrated from independent samples that such planetary uniformity occurs for both configurations near and distant from mean motion resonance, the question thus remains if the strength of this uniformity itself differs between near-resonant and nonresonant configurations such that the two modes may be astrophysically distinct in their evolution. We thus provide in this work a novel comparative size uniformity analysis for 48 near-resonant and 251 nonresonant multiplanet systems from the California Kepler Survey catalog, evaluating uniformity both across systems and between planetary pairs within the same system. We find that while multiplanet configurations exhibit strong peas-in-a-pod size uniformity regardless of their proximity to resonance, near-resonant configurations display enhanced intra-system size uniformity as compared to their analogous nonresonant counterparts at the level of both entire systems and subsystem planetary pairs and chains. These results are broadly consistent with a variety of formation paradigms for multiple-planet systems, such as convergent migration within a turbulent protoplanetary disk or planet–planet interactions incited by postnebular dynamical instabilities. Nevertheless, further investigation is necessary to ascertain whether the nonresonant and near-resonant planetary configurations respectively evolve via a singular process or mechanisms that are dynamically distinct.

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Section: Postnebular Dynamical Instabilities: Violent Disruption Of Mmrmentioning

confidence: 97%

Enhanced Size Uniformity for Near-resonant Planets

Goyal,

Dai,

Wang

2023

ApJ

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“…Planetary mass is intimately linked to the formation history of a given system (e.g., Adams et al 2020a;Adams et al 2020b) and is itself only significantly altered by large-scale, multibody dynamical phenomena (e.g., Izidoro et al 2017;Goldberg & Batygin 2022;Lammers et al 2023). Conversely, planetary size may be modulated to order unity by the growth or removal of a gaseous envelope that accounts for only a few percent of the total planetary mass (e.g., Owen & Wu 2013), and while the removal of such atmospheres may indeed correlate strongly with prior interplanetary interactions (Ghosh et al 2023), their presence and appearance are strongly governed by planet-dependent processes that lie distinct from system-level evolution. Examples of such phenomena include, but are not limited to, atmospheric erosion via core-powered processes (e.g., Ginzburg et al 2018;Berger et al 2023) or photoevaporation (e.g., Owen & Wu 2017;Mordasini 2020), inflation from tidal heating (Millholland 2019), surface-atmosphere chemical reactions , secondary outgassing (Kite & Barnett 2020), partial retention of a hydrogen envelope (Misener & Schlichting 2021), and mixing of an extended H/He envelope with steam (Burn et al 2024).…”

Section: Astrophysical Implicationsmentioning

confidence: 99%

Peas-in-a-pod across the Radius Valley: Rocky Systems Are Less Uniform in Mass but More Uniform in Size and Spacing

Goyal,

Wang

2024

ApJL

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The ubiquity of “peas-in-a-pod” architectural patterns and the existence of the radius valley each presents a striking population-level trend for planets with R p ≤ 4 R ⊕ that serves to place powerful constraints on the formation and evolution of these subgiant worlds. As it has yet to be determined whether the strength of this peas-in-a-pod uniformity differs on either side of the radius valley, we separately assess the architectures of systems containing only small (R p ≤ 1.6 R ⊕), rocky planets from those harboring only intermediate-sized (1.6 R ⊕ < R p ≤ 4 R ⊕), volatile-rich worlds to perform a novel statistical comparison of intra-system planetary uniformity across compositionally distinct regimes. We find that, compared to their volatile-rich counterparts, rocky systems are less uniform in mass (2.6σ) but more uniform in size (4.0σ) and spacing (3.0σ). We provide further statistical validation for these results, demonstrating that they are not substantially influenced by the presence of mean-motion resonances, low-mass host stars, alternative bulk compositional assumptions, sample size effects, or detection biases. We also obtain tentative evidence (>2σ significance) that the enhanced size uniformity of rocky systems is dominated by the presence of super-Earths (1 R ⊕ ≤ R p ≤ 1.6 R ⊕), while their enhanced mass diversity is driven by the presence of sub-Earth (R p < 1 R ⊕) worlds.

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“…Traditional optical observation methods encounter challenges such as limited depth of penetration and difficulties in imaging live samples 20 . Additionally, the use of lasers in conventional methods poses a potential risk of damaging sensitive biological samples 21 . Exploiting the advanced capabilities of SAM, it emerges as a particularly suitable approach for obtaining detailed images of fish scales.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty Quantification in Acoustic Impedance of Atlantic Salmon Fish Scale using Scanning Acoustic Microscopy

Agarwal,

Ojha,

Dalmo

et al. 2023

Preprint

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Scanning Acoustic Microscopy (SAM) emerges as a versatile label-free imaging technology with broad applications in biomedical imaging, non-destructive testing, and material research. This article presents a framework for the estimation of stochastic impedance through SAM, with a particular focus on its application to the salmon fish scale. The framework leverages uncertain reflectance, marking its pioneering application to uncertainty quantification in the acoustic impedance of fish scales through acoustic responses. The study uses maximal overlap discrete wavelet transform, to decompose acoustic responses effectively and is further processed to predict the acoustic impedance. To establish the effectiveness of the proposed framework, well-known materials like a pair of target medium (polyvinylidene fluoride) and reference medium (polyimide) are employed for impedance characterization. Results demonstrate over 90%accuracy in PVDF impedance estimation, validating the framework. A stochastic impedance map, using Kriging with a Gaussian variogram, offers insights into the complex biomechanics of a fish’s scale.

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Advances in Medical Imaging for Wound Repair and Regenerative Medicine

Cited by 5 publications

References 118 publications

Enhanced Size Uniformity for Near-resonant Planets

Enhanced Size Uniformity for Near-resonant Planets

Peas-in-a-pod across the Radius Valley: Rocky Systems Are Less Uniform in Mass but More Uniform in Size and Spacing

Uncertainty Quantification in Acoustic Impedance of Atlantic Salmon Fish Scale using Scanning Acoustic Microscopy

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