Results 41 to 50 of about 198 (153)

Mechanically Durable Intrinsically Stretchable Neuromorphic Devices via Molecular Microstructure Design

Small, Volume 22, Issue 41, 22 July 2026.
This study reports intrinsically stretchable neuromorphic devices that exhibit outstanding mechanical stability while fully preserving their electrical characteristics over 105 repeated deformation cycles under 50% tensile strain. Such robustness is achieved through a rational molecular design strategy that systematically modulates the chain packing of
Kwan‐Nyeong Kim, Ho‐Eon Baek, Min‐Jun Choi, Min‐Jun Sung, Seung‐Woo Lee, Chae‐Yun Song, Hyun‐Haeng Lee, Sangjun Ma, Karina Ayu Larasati, Jeong‐Yun Sun, Hea‐Lim Park, Yun‐Hi Kim, Tae‐Woo Lee   +12 more
wiley   +1 more source

SDSS-IV MaNGA: Physical Origins of Double-peaked Narrow Emission-line Spaxels in Barred Galaxies

The Astrophysical Journal
The physical origins of double-peaked narrow emission-line spaxels (DPSs) in barred galaxies are explored through the analysis of a sample of 72 barred double-peaked emission-line galaxies (DPGs) extracted from the MaNGA data set.
Jiajie Qiu, Shiyin Shen, Ruixiang Chang, Qianwen Zhao, Qi Zeng   +4 more
doaj   +1 more source

Stellar dynamics around transient co-rotating spiral arms

EPJ Web of Conferences, 2012
Spiral density wave theory attempts to describe the spiral pattern in spiral galaxies in terms of a long-lived wave structure with a constant pattern speed in order to avoid the winding dilemma.
Cropper M., Grand R.J.J., Kawata D.
doaj   +1 more source

Muon Flux Fluctuations and Solar Phenomena Using Regional Geomagnetic Indices With a Cosmic Ray Detector in Mexico City

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The data from a cosmic ray (CR) detector in Mexico City were collected over a period of 2 years from September 2023 to September 2025, during the maximum phase of Solar Cycle 25. The CR detector consists of an array of scintillators and measures the muonic component of secondary CRs.
D. Martínez‐Montiel, L. Serkin, G. Paić, J. O. Guerra‐Pulido, L. X. González   +4 more
wiley   +1 more source

Dynamically Driven Evolution of Molecular Gas in the Barred Spiral Galaxy M83 Traced by CO J = 2–1/1–0 Line Ratio Variations

The Astrophysical Journal
We show the variations of the CO J = 2–1/1–0 line ratio ( R _21/10 ) across the barred spiral galaxy M83, using the 46 pc resolution data from the Atacama Large Millimeter/submillimeter Array. The R _21/10 map clearly evidences the systematic large-scale
Jin Koda, Fumi Egusa, Akihiko Hirota, Amanda M Lee, Tsuyoshi Sawada, Fumiya Maeda   +5 more
doaj   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1593-1609, July 2026.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Reduction of the Bar Fraction in Paired Galaxies in the SDSS

The Astrophysical Journal
We investigate the bar fraction in galaxy pairs from the Sloan Digital Sky Survey to assess how galaxy interactions affect bar structures. Compared to isolated galaxies, close pairs exhibit a significantly reduced bar fraction at projected separations ...
Linlin Li, Shuai Feng, Shiyin Shen, Qi’an Deng, Ying Zu, Wenyuan Cui   +5 more
doaj   +1 more source

Microfluidic Engineering of Chitosan‐Coated Nanoemulsions for Controlled Release and Stability in Space Pharmaceutics

Advanced Materials Technologies, Volume 11, Issue 12, 18 June 2026.
Microfluidic engineering enables the fabrication of chitosan‐coated, melatonin‐loaded nanoemulsions with controlled release and enhanced physicochemical stability for space pharmaceutics. Interfacial biopolymer coating modulates droplet behavior under accelerated thermal stress and simulated microgravity.
Modupe Adebowale, Nguyen Van Duc Long, Philip M Williams, Volker Hessel   +3 more
wiley   +1 more source

Is NGC 4631 a barred spiral galaxy?

The Astronomical Journal, 1991
High- and low-dispersion optical spectra of the giant H II region CM 67 near the center of the edge-on galaxy NGC 4631 have been obtained. Comparisons are made with radio observations to suggest the existence of a large bar in NGC 4631. Region CM 67 is shown to coincide in position with the easternmost peak of a triple radio-continuum source.
Jean-Rene Roy, Jianguo Wang, Robin Arsenault   +2 more
openaire   +1 more source

GASP. XLV. Stellar Bars in Jellyfish Galaxies: Analysis of Ionized Gas and Stellar Populations

The Astrophysical Journal, 2023
Stellar bars have been found to substantially influence the properties of stellar populations in galaxies, affecting their ability to form stars. While this can be easily seen when studying galaxies in relatively isolated environments, such type of ...
Osbaldo Sánchez-García, Bernardo Cervantes Sodi, Jacopo Fritz, Alessia Moretti, Bianca M. Poggianti, Koshy George, Marco Gullieuszik, Benedetta Vulcani, Giovanni Fasano, Amira A. Tawfeek   +9 more
doaj   +1 more source