Results 61 to 70 of about 1,596 (183)

Chemical evolution of irregular and blue compact galaxies [PDF]

The Astrophysical Journal, 1995
We discuss the chemical evolution of metal poor galaxies and conclude that their oxygen deficiency is not due to: the production of black holes by massive stars or a varying slope of the Initial Mass Function, IMF, at the high-mass end. A varying IMF at the low-mass end alone or in combination with: (a) an outflow of oxygen-rich material, (b) an ...
Carigi, L., Colin, P., Peimbert, M., Sarmiento, A.   +3 more
openaire   +2 more sources

Self‐Powered Flexible Triboelectric‐Gated Ion‐Gel Transistor for Neuromorphic Tactile Sensing and Human Activity Recognition

Advanced Materials, Volume 38, Issue 37, 2 July 2026.
A fully flexible ion‐gel‐gated graphene‐channel transistor driven by a triboelectric nanogenerator enables self‐powered tactile sensing and synaptic learning. Mimicking spike‐rate‐dependent plasticity, the device exhibits frequency‐selective potentiation and depression, supporting rate‐coded neuromorphic computation even under flex.
Hanseong Cho, Seoyeon Park, Youngmin Lee, Sejoon Lee   +3 more
wiley   +1 more source

Steps toward Unraveling the Structure and Formation of Five Polar Ring Galaxies

Galaxies
Polar ring galaxies (PRGs) are unusual relative to common galaxies in that they consist of a central host galaxy—usually a gas-poor, early-type S0 or elliptical galaxy—surrounded by a ring of gas, dust and stars that orbit perpendicular to the major axis
Kyle E. Lackey, Varsha P. Kulkarni, Monique C. Aller   +2 more
doaj   +1 more source

FIGGS Faint Irregular Galaxies GMRT Survey [PDF]

, 2008
The Faint Irregular Galaxies GMRT Survey (FIGGS) is a large program aimed at providing a comprehensive and statistically robust characterisation of the neutral ISM properties of faint (M_B > -14.5), nearby, gas rich, dwarf irregular galaxies using the Giant Metrewave Radio Telescope (GMRT). Here we briefly describe the survey and discuss some of the
Begum, Ayesha, Chengalur, Jayaram N., Karachentsev, I. D., Sharina, Margarita, Kaisin, S. S.   +4 more
openaire   +2 more sources

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, Volume 11, Issue 13, 8 July 2026.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Star Formation in the Lopsided Galaxy Arp 291

The Astrophysical Journal
We have investigated the star formation process taking place in the lopsided galaxy Arp 291, based on narrowband images in the H α , [N ii ] λ 6583, and [O iii ] λ 5007 emission lines, obtained using the modern tunable photometer MaNGaL at the Caucasus ...
Irina S. Proshina, Dmitriy V. Oparin
doaj   +1 more source

Supramolecular Aggregates of Amino Acid‐Functionalized 1,8‐Naphthalimides for Chiral Recognition

Chemistry–Methods, Volume 6, Issue 7, July 2026.
We synthesized three self‐assembling, amino acid‐functionalized 1,8‐naphthalimides. We studied their aggregation in solution and demonstrated their chiral recognition ability by fluorescence and resonance light scattering measurements. Notably, these fluorescent probes maintain their chiral recognition ability when incorporated in solid supports like ...
Salvatore Marullo, Francesca D’Anna
wiley   +1 more source

UV Star Formation Rates of the SHIELD Dwarf Galaxies

The Astrophysical Journal
The Survey of H i in Extremely Low-mass Dwarfs (SHIELD) is a multiwavelength observational project targeting gas-rich, star-forming dwarf galaxies at the faint end of the H i mass function. We present near-ultraviolet (NUV) and far-ultraviolet (FUV) flux
David G. Gormanous, Anjali S. Dziarski, John J. Salzer, John M. Cannon, Steven Janowiecki, Nathalie Haurberg, April Horton, Elizabeth A. K. Adams, Martha P. Haynes, Myles J. Klapkowski, Joshua R. Marine, Kristen B. W. McQuinn, Katherine L. Rhode, Evan D. Skillman   +13 more
doaj   +1 more source

COMPOSITUM 2/ WHEAT FRIZZY PANICLE dosage dependently regulates inflorescence and root architecture in Triticeae cereals

The Plant Journal, Volume 127, Issue 2, July 2026.
Significance Statement FRIZZY PANICLE has been described as a principal regulator of cereal inflorescence development; however, the precise regulatory mechanism, specifically, the role of the WFZP‐B allele in spike architectural regulation is unknown.
Christian W. Hertig, Ravi Koppolu, Victor H. Rabesquine Nogueira, Cornelia Marthe, Nagaveni Budhagatapalli, Stefan Hiekel, Kavya Amte, Irene M. Fontana, Yongyu Huang, Astrid Junker, Amanda S. Câmara, Thorsten Schnurbusch, Jochen Kumlehn   +12 more
wiley   +1 more source

On the impact of magnetic-field models in galaxy clusters on constraints on axion-like particles from the lack of irregularities in high-energy spectra of astrophysical sources

Physics Letters B, 2020
Photons may convert to axion-like particles (ALPs) in external magnetic fields. Under certain conditions, this effect should result in irregular features in observed spectra of astrophysical sources.
Maxim Libanov, Sergey Troitsky
doaj   +1 more source