Zobrazeno 1 - 10
of 5 983
pro vyhledávání: '"high contrast"'
Autor:
Paul Condron, Daniel M. Cornfeld, Miriam Scadeng, Tracy R. Melzer, Gil Newburn, Mark Bydder, Eryn E. Kwon, Joshua P. McGeown, Geoffrey G. Handsfield, Taylor Emsden, Maryam Tayebi, Samantha J. Holdsworth, Graeme M. Bydder
Publikováno v:
Tomography, Vol 10, Iss 7, Pp 983-1013 (2024)
Ultra-high contrast (UHC) MRI describes forms of MRI in which little or no contrast is seen on conventional MRI images but very high contrast is seen with UHC techniques. One of these techniques uses the divided subtracted inversion recovery (dSIR) s
Externí odkaz:
https://doaj.org/article/4c91cd48264f4e6287ca19b2801c8f85
Autor:
LIU Fengmao, LI Jie
Publikováno v:
Taiyuan Ligong Daxue xuebao, Vol 55, Iss 3, Pp 414-426 (2024)
Purposes The development of information technology has significantly impacted economic, political, cultural, and military fields, and the information security is of great importance in modern society. Deep information-hiding, i．e. hiding the confid
Externí odkaz:
https://doaj.org/article/8628b6c1ed504b1088507510593cdb36
Autor:
Changhui Rao, Haisheng Ji, Hua Bao, Xuejun Rao, Jinsheng Yang, Youming Guo, Lanqiang Zhang, Libo Zhong, Xinlong Fan, Qingmin Zhang, Cheng Li, Qing Bian
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
In the forefront of quantitative solar physics research using large-aperture ground-based solar optical telescopes, high-contrast observation along with high-accuracy polarimetric measurement in the solar active region are required. In this paper, we
Externí odkaz:
https://doaj.org/article/04dd32fd68be4fd08157f9c4ea614b42
Publikováno v:
Photonics, Vol 11, Iss 10, p 923 (2024)
The circularly polarized laser sources are core components for many optical applications such as biomedicine, quantum technology, and AR/VR. However, conventional techniques make it difficult to further diminish the size of circularly polarized laser
Externí odkaz:
https://doaj.org/article/474d7d21537144eca870fdde0e6b4645
Publikováno v:
In Optical Materials February 2024 148
Publikováno v:
In Journal of Computational and Applied Mathematics June 2025 461
Autor:
Zhiwen Zhao
Publikováno v:
Mathematics in Engineering, Vol 5, Iss 3, Pp 1-11 (2023)
The insulated and perfect conductivity problems arising from high-contrast composite materials are considered in all dimensions. The solution and its gradient, respectively, represent the electric potential and field. The novelty of this paper lies i
Externí odkaz:
https://doaj.org/article/18e930469a8241cf87d88f874e9b0ae8
Autor:
Jerry W. Xuan, Marshall D. Perrin, Dimitri Mawet, Heather A. Knutson, Sagnick Mukherjee, Yapeng Zhang, Kielan K. W. Hoch, Jason J. Wang, Julie Inglis, Nicole L. Wallack, Jean-Baptiste Ruffio
Publikováno v:
The Astrophysical Journal Letters, Vol 977, Iss 2, p L32 (2024)
We present JWST/Mid Infrared Instrument (MIRI) low-resolution spectroscopy (4.75–14 μ m) of the first known substellar companion, Gliese 229Bab, which was recently resolved into a tight binary brown dwarf. Previous atmospheric retrieval studies mo
Externí odkaz:
https://doaj.org/article/aa44aea58fe846c08471f982f7d1222d
Autor:
Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring, Ell Bogat, Charles A. Beichman, Geoffrey Bryden, András Gáspár, Tyler D. Groff, Michael W. McElwain, Michael R. Meyer, Thomas Barclay, Per Calissendorff, Matthew De Furio, Yiting Li, Marcia J. Rieke, Marie Ygouf, Thomas P. Greene, Julien H. Girard, Mario Gennaro, Jens Kammerer, Armin Rest, Thomas L. Roellig, Ben Sunnquist
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 1, p L8 (2024)
Observations of debris disks offer important insights into the formation and evolution of planetary systems. Though M dwarfs make up approximately 80% of nearby stars, very few M dwarf debris disks have been studied in detail—making it unclear how
Externí odkaz:
https://doaj.org/article/32b76b4fc6644912851c21d4123035a1
Autor:
Gabriele Cugno, Polychronis Patapis, Andrea Banzatti, Michael Meyer, Felix A. Dannert, Tomas Stolker, Ryan J. MacDonald, Klaus M. Pontoppidan
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 1, p L21 (2024)
GQ Lup B is a forming brown dwarf companion ( M ∼ 10–30 M _J ) showing evidence for an infrared excess associated with a disk surrounding the companion itself. Here we present mid-infrared (MIR) observations of GQ Lup B with the Medium Resolution
Externí odkaz:
https://doaj.org/article/71b8c25db9ec4c4bafe2ab202abdd394