Results 41 to 50 of about 215 (139)

An Interview With Peter Rousseeuw

open access: yesInternational Statistical Review, Volume 93, Issue 1, Page 1-17, April 2025.
Summary Peter J. Rousseeuw is a statistician known mainly for his work on robust statistics and cluster analysis. Among his creations are least trimmed squares regression, the minimum covariance determinant estimator, the partitioning around medoids clustering method and the silhouettes graphical display.
Mia Hubert
wiley   +1 more source

Surfing the T Wave: A Primer on ECG T Wave Morphologies Encountered in Clinical Trials and Impact on the QT Interval and Patient Safety

open access: yesClinical and Translational Science, Volume 18, Issue 3, March 2025.
ABSTRACT Electrocardiogram (ECG) interpretation and measurement is an essential aspect of patient safety and pharmacovigilance in clinical trials. Changes in the T wave segment of an ECG can provide both diagnostic and prognostic information and may be affected by a variety of intrinsic and extrinsic factors related to drug administration.
Robert M. Lester, Sabina Paglialunga
wiley   +1 more source

Heterochrony and Oophagy Underlie the Evolution of Giant Filter‐Feeding Lamniform Sharks

open access: yesEvolution &Development, Volume 27, Issue 1, March 2025.
Retention of juvenile craniofacial characteristics by paedomorphosis (heterochrony) may have facilitated the evolution of gigantism in filter‐feeding lamniform sharks, by increasing the efficiency of prey acquisition. ABSTRACT Evolutionary transitions toward gigantic body sizes have profound consequences for the structure and dynamics of ecological ...
Joel H. Gayford   +3 more
wiley   +1 more source

White Dwarf Stars in the Big Data Era

open access: yesAstronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT White dwarf stars are the most common endpoint of stellar evolution. Therefore, these old, numerous and compact objects provide valuable information on the late stages of stellar evolution, the physics of dense plasma and the structure and evolution of our Galaxy.
Maria Camisassa
wiley   +1 more source

Bio‐Inspired Fluorescent Calcium Sulfate for the Conservation of Gypsum Plasterwork

open access: yesSmall, Volume 20, Issue 43, October 24, 2024.
This study explores the nonclassical crystallization of calcium sulfates using calcein, aiming to develop bio‐inspired methods for tailored consolidation products in heritage conservation. Through this investigation, fluorescent nano‐bassanite (NB‐C) consolidants are synthesized.
Miguel Burgos‐Ruiz   +6 more
wiley   +1 more source

A Planetary Nebula from a 5.7 M⊙ Progenitor in a 90 Myr M31 Star Cluster

open access: yesThe Astrophysical Journal Letters
Planetary nebulae (PNe) trace the late evolution of low-to-intermediate-mass stars, yet the masses of their progenitors are rarely measured directly. Here we present a PN physically associated with a young star cluster in M31, providing an unprecedented ...
Pinjian Chen   +4 more
doaj   +1 more source

Tracing the Evolution of the Emission Properties of Carbon-Rich AGB, Post-AGB, and PN Sources

open access: yesAstronomy
Understanding the transition from the Asymptotic Giant Branch (AGB) to the Planetary Nebula (PN) phase is crucial for advancing our knowledge of galaxy evolution and the chemical enrichment of the universe. In this manuscript, we analyze 137 carbon-rich,
Silvia Tosi, Ester Marini
doaj   +1 more source

Excitation of Post-asymptotic Giant Branch Star Binary Eccentricity by Massive Polar-aligned Circumbinary Disks

open access: yesThe Astrophysical Journal
Many post-asymptotic giant branch star binaries are observed to have relatively high orbital eccentricities (up to 0.6). Recently, AC Her was observed to have a polar-aligned circumbinary disk. We perform hydrodynamic simulations to explore the impact of
Shunquan Huang   +2 more
doaj   +1 more source

Population II PAGB Stars. I. Methodology, Initial Results, and the First Luminosity Function

open access: yesThe Astrophysical Journal
Post-asymptotic giant branch (PAGB) stars share many advantages with the tip of the red giant branch (TRGB) for Population II distance measurements, including minimal internal reddening, easy identification, a solid theoretical foundation, and an ...
S. Jean Feeser   +4 more
doaj   +1 more source

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