Results 61 to 70 of about 2,400,614 (354)

Classification of Tidal Disruption Events Based on Stellar Orbital Properties [PDF]

, 2018
We study the rates of tidal disruption of stars on bound to unbound orbits by intermediate-mass to supermassive black holes using high-accuracy direct N-body experiments.
K. Hayasaki, Shiyan Zhong, Shuo Li, P. Berczik, R. Spurzem   +4 more
semanticscholar   +1 more source

SDSS-DR12 bulk stellar spectral classification: Artificial neural networks approach [PDF]

Astrophysics and Space Science, 2016
This paper explores the application of Probabilistic Neural Network (PNN), Support Vector Machine (SVM) and K-means clustering as tools for automated classification of massive stellar spectra.
S. Kheirdastan, Mahdi Bazarghan
semanticscholar   +1 more source

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

THE SAMI GALAXY SURVEY: REVISITING GALAXY CLASSIFICATION THROUGH HIGH-ORDER STELLAR KINEMATICS [PDF]

, 2016
Recent cosmological hydrodynamical simulations suggest that integral field spectroscopy can connect the high-order stellar kinematic moments h3 (∼skewness) and h4 (∼kurtosis) in galaxies to their cosmological assembly history.
J. V. D. Sande, J. Bland-Hawthorn, L. Fogarty, L. Cortese, Francesco d, Eugenio, S. Croom, N. Scott, J. Allen, S. Brough, J. Bryant, G. Cecil, M. Colless, W. Couch, R. Davies, P. Elahi, C. Foster, G. Goldstein, M. Goodwin, B. Groves, I. Ho, Hyunjin Jeong, D. H. Jones, I. Konstantopoulos, J. Lawrence, S. Leslie, Á. López-Sánchez, R. McDermid, R. McElroy, A. Medling, Sree Oh, M. Owers, S. Richards, A. Schaefer, R. Sharp, S. Sweet, D. Taranu, C. Tonini, C. Walcher, S. K. Yi   +39 more
semanticscholar   +1 more source

Dendritic cells steering antigen and leukocyte traffic in lymph nodes

FEBS Letters, EarlyView.
Dendritic cells are key players in the activation of T cells and their commitment to effector function. In this In a Nutshell Review, we will discuss how dendritic cells guide the trafficking of antigen and leukocytes in the lymph node, thus influencing T‐cell activation processes. Dendritic cells (DCs) play a central role in initiating and shaping the
Enrico Dotta, Agnieszka Katarzyna Maciola, Tania Baccega, Giulia Pasqual   +3 more
wiley   +1 more source

The dual nature of TDC – bridging dendritic and T cells in immunity

FEBS Letters, EarlyView.
TDC are hematopoietic cells combining dendritic and T cell features. They reach secondary lymphoid organs (SLOs) and peripheral organs (liver and lungs) after FLT3‐dependent development in the bone marrow and maturation in the thymus. TDC are activated and enriched in SLOs upon viral infection, suggesting that they might play unique immune roles, since
Maria Nelli, Mirela Kuka
wiley   +1 more source

Semi-empirical analysis of Sloan Digital Sky Survey galaxies III. How to distinguish AGN hosts [PDF]

, 2006
We consider the techniques to distinguish normal star forming (NSF) galaxies and active galactic nuclei (AGN) hosts using optical spectra. The observational data base is a set of 20000 galaxies extracted from the Sloan Digital Sky Survey, for which we ...
Asari, N. V., Fernandes, R. Cid, Mateus, A., Sodre Jr., L., Stasinska, G.   +4 more
core   +5 more sources

StellarGAN: Classifying Stellar Spectra with Generative Adversarial Networks in SDSS and APOGEE Sky Surveys

The Astrophysical Journal Supplement Series
Extracting precise stellar labels is crucial for large spectroscopic surveys like the Sloan Digital Sky Survey (SDSS) and APOGEE. In this paper, we report the newest implementation of StellarGAN, a data-driven method based on generative adversarial ...
Wei Liu, Shuo Cao, Xian-Chuan Yu, Meng Zhu, Marek Biesiada, Jiawen Yao, Minghao Du   +6 more
doaj   +1 more source

The immunological interface: dendritic cells as key regulators in metabolic dysfunction‐associated steatotic liver disease

FEBS Letters, EarlyView.
Metabolic dysfunction‐associated steatotic liver disease (MASLD) affects nearly one‐third of the global population and poses a significant risk of progression to cirrhosis or liver cancer. Here, we discuss the roles of hepatic dendritic cell subtypes in MASLD, highlighting their distinct contributions to disease initiation and progression, and their ...
Camilla Klaimi, WanTing Kong, Camille Blériot, Joel T. Haas   +3 more
wiley   +1 more source

(Teff,log g,[Fe/H]) Classification of Low-Resolution Stellar Spectra using Artificial Neural Networks [PDF]

, 1999
New generation large-aperture telescopes, multi-object spectrographs, and large format detectors are making it possible to acquire very large samples of stellar spectra rapidly.
Beers, Timothy C., Hippel, Ted von, Lambert, David L., Prieto, Carlos Allende, Qu, Yuan, Rossi, Silvia, Sneden, Christopher, Snider, Shawn   +7 more
core   +3 more sources