Results 71 to 80 of about 8,619 (182)
FORMATION AND MAINTENANCE OF SPIRAL STRUCTURE IN GALAXIES [PDF]
Symposium - International Astronomical Union, 1985 The formation and maintenance of spiral structure in galaxies is discussed in terms of spiral modes with a general perception consistent with the hypothesis of quasi-stationary spiral structure. The latter is explained in some detail to give it the original proper perspective and to contrast it with recent studies of non-stationary spiral structures ...
C. C. Lin, G. Bertin
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A Review of Failure Modes and Safety Strategies of Lithium‐Ion Batteries from Materials to Systems
Advanced Science, Volume 13, Issue 42, 28 July 2026.A cascade‐aware framework is presented for lithium‐ion battery safety, linking thermal runaway initiation, acceleration, runaway reaction, and propagation with material‐, cell/pack‐, and system‐level interventions. By integrating failure mechanisms, quantitative safety indicators, and staged interception strategies, this review highlights how safer ...
Jin Hyeok Yang +8 more
wiley +1 more source
Rotation Curves of 967 Spiral Galaxies [PDF]
The Astrophysical Journal Supplement Series, 1995 We present the rotation curves (RCs) of 967 spiral galaxies, obtained by folding and deprojecting the raw optical data by Mathewson et al. (1992). Out of these, we have identified 80 excellent RCs and 820 fair RCs. The 80 excellent RCs are smooth, symmetric, have negligible rms internal error, extend to at least the optical radius, and have high and ...
Persic, M., Salucci, P.
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Gas minor-axis velocity gradients in early-type spiral galaxies [PDF]
, 2003 We measured a remarkable gas velocity gradient along the minor axis of 5 early-type spiral galaxies. This phenomenon suggests the presence of a kinematically-decoupled component in orthogonal rotation with respect to the galaxy disk.
COCCATO, LODOVICO +3 more
core +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
Gaseous spiral structure and mass drift in spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We use hydrodynamic simulations to investigate nonlinear gas responses to an imposed stellar spiral potential in disk galaxies. The gaseous medium is assumed to be infinitesimally thin, isothermal, and unmagnetized. We consider various spiral-arm models with differing strength and pattern speed.
Kim, Yonghwi, Kim, Woong-Tae
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A polarisation study of spiral galaxies [PDF]
, 1987 Optical polarimetry results are presented for four spiral galaxies: NGC 5194 (M51), NGC 1068, NGC 4565 and NGC 4594 (Ml04). M51 and NGC 1068 show spiral polar isation patterns which are interpreted as indicating a spiral magnetic field in each case.
Ward-Thompson, Derek, Ward-Thompson, D
core
Counter-Rotating Disks in Galaxies [PDF]
, 2023 reservedCounter-rotation is a phenomenon found in some galaxies; it happens when a counter-rotating disk which rotates in an opposite direction to the main disk is found.
EL-SAYEGH, ALYAA EL-HAK
core
National Materials, Volume 1, Issue 1, Page 48-71, July 2026.Circular differential scattering (CDS) spectroscopy relies on a modified dark‐field optical microscope to study single chiral nanostructures, avoiding the averaging effects of ensemble methods. Recently achieving improved detection limits of 1.5%, this robust technique analyzes plasmonic chirality and molecular interactions, with the future goal of ...
Hao Li +3 more
wiley +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
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