Results 71 to 80 of about 2,400,614 (354)

Astrophysical Information from Objective Prism Digitized Images: Classification with an Artificial Neural Network

open access: yesEURASIP Journal on Advances in Signal Processing, 2005
Stellar spectral classification is not only a tool for labeling individual stars but is also useful in studies of stellar population synthesis. Extracting the physical quantities from the digitized spectral plates involves three main stages: detection ...
Bratsolis Emmanuel
doaj   +1 more source

Architecture of Hierarchical Stellar Systems and Their Formation

open access: yesUniverse, 2021
Accumulation of new data on stellar hierarchical systems and the progress in numerical simulations of their formation open the door to genetic classification of these systems, where properties of a certain group (family) of objects are tentatively ...
Andrei Tokovinin
doaj   +1 more source

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

open access: yesFEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source

The Relationship Between Stellar Light Distributions of Galaxies and their Formation Histories [PDF]

open access: yes, 2003
A major problem in extragalactic astronomy is the inability to distinguish in a robust, physical, and model independent way how galaxy populations are related to each other and to their formation histories. A similar, but distinct, and also long standing
Abraham R. G.   +21 more
core   +1 more source

Making tau amyloid models in vitro: a crucial and underestimated challenge

open access: yesFEBS Letters, EarlyView.
This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley   +1 more source

Automated Morgan Keenan Classification of Observed Stellar Spectra Collected by the Sloan Digital Sky Survey Using a Single Classifier

open access: yesAstronomical Journal, 2019
The classification of stellar spectra is a fundamental task in stellar astrophysics. Stellar spectra from the Sloan Digital Sky Survey are applied to standard classification methods, k-nearest neighbors and random forest, to automatically classify the ...
Michael J. Brice, Razvan Andonie
semanticscholar   +1 more source

The cytoskeletal control of B cell receptor and integrin signaling in normal B cells and chronic lymphocytic leukemia

open access: yesFEBS Letters, EarlyView.
In lymphoid organs, antigen recognition and B cell receptor signaling rely on integrins and the cytoskeleton. Integrins act as mechanoreceptors, couple B cell receptor activation to cytoskeletal remodeling, and support immune synapse formation as well as antigen extraction.
Abhishek Pethe, Tanja Nicole Hartmann
wiley   +1 more source

Stellar spectrum classifier [PDF]

open access: yes, 1970
Stellar classification is accomplished by correlating holograms of classified spectra with the Fourier transform of the spectral images to be ...
Reid, J. H.
core   +1 more source

A Data-driven Spectral Model of Main-sequence Stars in Gaia DR3

open access: yesThe Astrophysical Journal
Precise spectroscopic classification of planet hosts is an important tool of exoplanet research at both the population and individual system level.
Isabel Angelo   +3 more
doaj   +1 more source

Panel Discussion on the Classification and Terminology of Stellar Populations [PDF]

open access: yesAstrophysics and Space Science, 1995
It was the feeling of the Scientific Organizing Committee that 50 years after the introduction of the concept of stellar populations it might be desirable to attempt to rationalize their classification and terminology. Toward this end a panel discussion was organized, which was followed by a period of audience participation.
openaire   +3 more sources

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