Results 121 to 130 of about 559,591 (386)

Patterning the Void: Combining L‐Systems with Archimedean Tessellations as a Perspective for Tissue Engineering Scaffolds

Advanced Functional Materials, EarlyView.
This study introduces a novel multi‐scale scaffold design using L‐fractals arranged in Archimedean tessellations for tissue regeneration. Despite similar porosity, tiles display vastly different tensile responses (1–100 MPa) and deformation modes. In vitro experiments with hMSCs show geometry‐dependent growth and activity. Over 55 000 tile combinations
Maria Kalogeropoulou, Kenny A. van Kampen, Pierpaolo Fucile, Carlos Mota, Lorenzo Moroni   +4 more
wiley   +1 more source

JWST Reveals a Surprisingly High Fraction of Galaxies Being Spiral-like at 0.5 ≤ z ≤ 4

The Astrophysical Journal Letters
Spiral arms are one of the most important features used to classify the morphology of local galaxies. The cosmic epoch when spiral arms first appeared contains essential clues to the evolution of disk galaxies.
Vicki Kuhn, Yicheng Guo, Alec Martin, Julianna Bayless, Ellie Gates, AJ Puleo   +5 more
doaj   +1 more source

Kiloparsec-scale star formation law in M81 and M101 based on AKARI far-infrared observations

, 2010
We assess the relationships between the surface densities of the gas and star formation rate (SFR) within spiral arms of the nearby late-type spiral galaxies M81 and M101. By analyzing these relationships locally, we derive empirically a kiloparsec scale
Allen, Bigiel, Brouillet, Calzetti, Chynoweth, Cottrell, Cox, Dale, de Jong, Draine, Elmegreen, Freedman, Gao, Garnett, Gordon, Gordon, H. Kaneda, H. Shibai, Hamajima, Hasegawa, Hildebrand, Kaufman, Kawada, Kenney, Kennicutt, Kennicutt, Kennicutt, Knapen, Li, Lin, Maddalena, Misiriotis, Murakami, Parker, Pilyugin, Prescott, Pérez-González, Rice, Rieke, Rogstad, Rots, Sandage, Santillán, Sauvage, Schmidt, Schuster, Scoville, Scoville, Shirahata, Siebenmorgen, Smith, Suzuki, Suzuki, T. Nakagawa, T. Onaka, T. Suzuki, Taniguchi, Van der Hulst, Wilson   +58 more
core   +1 more source

Galaxy Zoo and sparcfire: constraints on spiral arm formation mechanisms from spiral arm number and pitch angles [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
In this paper we study the morphological properties of spiral galaxies, including measurements of spiral arm number and pitch angle. Using Galaxy Zoo 2, a stellar mass-complete sample of 6,222 SDSS spiral galaxies is selected. We use the machine vision algorithm SpArcFiRe to identify spiral arm features and measure their associated geometries.
Ross E. Hart, Steven P. Bamford, Wayne B. Hayes, Carolin N. Cardamone, William C. Keel, Sandor J. Kruk, Chris J. Lintott, Karen L. Masters, Brooke D. Simmons, Rebecca J. Smethurst   +9 more
openaire   +7 more sources

Spiral Arms, Infall, and Misalignment of the Circumbinary Disk from the Circumstellar Disks in the Protostellar Binary System L1551 NE [PDF]

, 2017
We report the ALMA Cycle 2 observations of the Class I binary protostellar system L1551 NE in the 0.9 mm continuum, C18O (3–2), 13CO (3–2), SO (78–67), and CS (7–6) emission.
S. Takakuwa, K. Saigo, Tomoaki Matsumoto, M. Saito, Jeremy Lim, T. Hanawa, Hsi-Wei Yen, P. Ho   +7 more
semanticscholar   +1 more source

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

Advanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker, Robert Winkler, Ulrich Hohenester, Evelin Fisslthaler, Daniel Knez, Gerald Kothleitner, Georg Haberfehlner   +6 more
wiley   +1 more source

Forces Attributed to Dark Matter May Originate from Entangled Particles as Seen in the Shape Of Galaxies Formed by Grbs

International Journal of Engineering and Management Sciences, 2018
Recently, it has been suggested that entangled particles may be connected by a wormhole. If that is right, what is the distance between them we have to take into account when applying Newton's law of universal gravitation to these particles?
Sándor Buglyó
doaj   +1 more source

Star formation in galaxies: the role of spiral arms [PDF]

, 2013
Studying star formation in spiral arms tells us not only about the evolution of star formation, and molecular clouds, but can also tell us about the nature of spiral structure in galaxies.
Dobbs, Clare
core   +1 more source

The spiral arms of galaxies

, 2022
The most important theory of the spiral arms of galaxies is the density wave theory based on the Lin-Shu dispersion relation. However, the density waves move with the group velocity towards the inner Lindblad resonance and tend to disappear. Various mechanisms to replenish the spiral waves have been proposed.
openaire   +2 more sources

Bio‐Friendly Artificial Muscles Based on Carbon Nanotube Yarns and Eutectogel Derivatives

Advanced Functional Materials, EarlyView.
Solid‐state artificial muscles based on coiled commercial carbon nanotube yarns coated with eutectogel derivatives exhibit unipolar actuation through selective ion intercalation. Combining polyanionic and polycationic gels enables enhanced contractile stroke and high energy density.
Gabriela Ananieva, Cédric Vancaeyzeele, Giao T.M. Nguyen, Daniel Aguilera‐Bulla, Mathieu Pinault, Frédéric Vidal, Cédric Plesse   +6 more
wiley   +1 more source