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Showing 20 of 526 academic articles

Fractals and Chaos in Geology and Geophysics

Donald L. Turcotte • Cambridge University Press eBooks (1997)

The fundamental concepts of fractal geometry and chaotic dynamics, along with the related concepts of multifractals, self-similar time series, wavelets, and self-organised criticality, are introduced in this book, for a broad range of reade...

OPENALEX DOI: https://doi.org/10.1017/cbo9781139174695

Technosignatures Longevity and Lindy's Law

Amedeo Balbi, Claudio Grimaldi • The Astronomical Journal (2024)

The probability of detecting technosignatures (i.e., evidence of technological activity beyond Earth) increases with their longevity, or the time interval over which they manifest. Therefore, the assumed distribution of longevities has some...

DOAJ Open Access (DOAJ) DOI: 10.3847/1538-3881/ad217d

To Be or Not to Be: Alicante-8, a Cluster or Not?

Randa Asa’d, V. D. Ivanov, I. Negueruela, J. M John et al. • The Astronomical Journal (2023)

Recent surveys have uncovered new young massive clusters that host dozens of red supergiants (RSGs) near the inner Galaxy. However, many of them have still not been fully studied. Using Very Large Telescope/X-shooter near-infrared spectra, ...

DOAJ Open Access (DOAJ) DOI: 10.3847/1538-3881/acc841

Imaging with Diffractive Axicons Rapidly Milled on Sapphire by Femtosecond Laser Ablation

Daniel Smith, Soon Hock Ng, Molong Han, Tomas Katkus et al. • Engineering Proceedings (2023)

We show that single-pulse burst fabrication will produce a flatter and smoother profile of axicons milled on sapphire compared to pulse overlapped fabrication which results in a damaged and much rougher surface. The fabrication of large-are...

DOAJ Open Access (DOAJ) DOI: 10.3390/HMAM2-14147

Neutrons and Nuclear Engineering

Allen E Ekkebus • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (2007)

Oak Ridge National Laboratory hosted two workshops in April 2007 relevant to nuclear engineering education. In the Neutron Stress, Texture, and Phase Transformation for Industry workshop [http://neutrons.ornl.gov/workshops/nst2/], several i...

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Radiation Chemistry in Nuclear Engineering

Junichi Takagi, Bruce J. Mincher, Makoto Yamaguchi, Yosuke Katsumura • CRC Press eBooks (2010)

Rare gas liquids (RGLs) have excellent properties such as those required for radiation detectors, forinstance,highelectronmobility,lowW-value,highphotonproductionrate,highdensity,high Znumberwithnopermanentradiationdamage,andpracticallynoli...

OPENALEX DOI: https://doi.org/10.1201/b10389-35