Results 91 to 100 of about 19,599 (301)

Spiral structure and the rotation of galaxies [PDF]

, 1958
B. A. Vorontsov-Vel'Yaminov
openalex   +1 more source

Potential Spectral Tuning of the Tapetum Lucidum in a Broadly Distributed Ungulate

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
ABSTRACT The tapetum lucidum, a biological reflector system found in the eyes of many vertebrate species, enhances visual sensitivity in low light conditions by reflecting light back through the retina. The structure of the ungulate tapetum fibrosum is unique, and its reflectance varies temporally in reindeer (Rangifer tarandus).
Blaise A. Newman, Billy R. Hammond Jr., Gino J. D'Angelo   +2 more
wiley   +1 more source

A summary and assessment of current 21-cm results concerning spiral and disk structures in our galaxy [PDF]

, 1959
J. H. Oort
openalex   +1 more source

ATAC‐seq in Emerging Model Organisms: Challenges and Strategies

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Principle of ATAC‐seq (left), overview of arthropod species with published ATAC‐seq data (middle), summary of experimental design (right). ABSTRACT The Assay for Transposase‐Accessible Chromatin with sequencing (ATAC‐seq) is a versatile and widely utilized method for identifying potential regulatory regions, such as promoters and enhancers, within a ...
Duğçar Ebrar Erdoğan, Shadi Karimifard, Mozhgan Khodadadi, Liucong Ling, Luisa Linke, Ana Catalán, Vincent Doublet, Amanda Glaser‐Schmitt, Oliver Niehuis, Katja Nowick, Antonella Soro, Natascha Turetzek, Barbara Feldmeyer, Nico Posnien   +13 more
wiley   +1 more source

The Vertical Metallicity Gradient of the Galactic Disk for Mono-age Stellar Populations in LAMOST

The Astrophysical Journal
The vertical metallicity gradient of the Galactic disk offers valuable insights into the disk’s formation and chemical evolution over time. We utilized the Large Sky Area Multi-Object Fibre Spectroscopic Telescope low-resolution spectral young stellar ...
Gaohuan Long, Haibo Yuan, Shuai Xu, Chun Wang, Ruoyi Zhang, Bowen Huang   +5 more
doaj   +1 more source

The Theory of Spiral Structure of Galaxies [PDF]

Symposium - International Astronomical Union, 1970
A Landau-type instability mechanism for generating spiral waves is suggested.Two populations of stars, Populations I and II, are considered, the second one with mean rotational velocity zero. Then a dispersion relation is derived which is reduced to the Lin-Shu dispersion relation in the case of vanishing Population II. The amplification of the wave is
openaire   +2 more sources

Investigating the effects of degradation and restoration on face recognition in under‐display cameras

Journal of the Society for Information Display, EarlyView.
Under‐display camera (UDC) enables full‐screen displays but degrades facial recognition accuracy due to diffraction‐induced distortions. This paper introduces three UDC face recognition datasets generated using a GAN trained on synthetic and real‐world images with flares.
Kyusu Ahn, Chanwoo Park, Jaejin Lee
wiley   +1 more source

IllustrisTNG in the HSC-SSP: No Shortage of Thin Disk Galaxies in TNG50

The Astrophysical Journal
We perform a thorough analysis of the projected shapes of nearby galaxies in both observations and cosmological simulations. We implement a forward-modeling approach to overcome the limitations in previous studies, which hinder accurate comparisons ...
Dewang Xu, Hua Gao, Connor Bottrell, Hassen M. Yesuf, Jingjing Shi   +4 more
doaj   +1 more source

Comparison of HI spiral pattern by optical structure of other galaxies [PDF]

, 1964
G. de Vaucouleurs
openalex   +1 more source

Behavioural and physiological responses of chacma baboons (Papio ursinus) to human‐induced mortality in anthropogenically modified habitat

People and Nature, EarlyView.
Abstract As a result of expanding human populations and the anthropogenic modification of natural habitats, many wildlife populations are living in increasing proximity to humans. While this may provide benefits to some species through increased access to resources, sharing space and resources often leads to negative interactions or ‘conflict’ between ...
Md Mokhlesur Rahman, Russell A. Hill, Ann M. MacLarnon   +2 more
wiley   +1 more source