Zobrazeno 1 - 10
of 5 935
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
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
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
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:
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
Autor:
Steph Sallum, Shrishmoy Ray, Jens Kammerer, Anand Sivaramakrishnan, Rachel Cooper, Alexandra Z. Greebaum, Deepashri Thatte, Matthew De Furio, Samuel M. Factor, Michael R. Meyer, Jordan M. Stone, Aarynn Carter, Beth Biller, Sasha Hinkley, Andrew Skemer, Genaro Suárez, Jarron M. Leisenring, Marshall D. Perrin, Adam L. Kraus, Olivier Absil, William O. Balmer, Sarah K. Betti, Anthony Boccaletti, Mariangela Bonavita, Mickael Bonnefoy, Mark Booth, Brendan P. Bowler, Zackery W. Briesemeister, Marta L. Bryan, Per Calissendorff, Faustine Cantalloube, Gael Chauvin, Christine H. Chen, Elodie Choquet, Valentin Christiaens, Gabriele Cugno, Thayne Currie, Camilla Danielski, Trent J. Dupuy, Jacqueline K. Faherty, Michael P. Fitzgerald, Jonathan J. Fortney, Kyle Franson, Julien H. Girard, Carol A. Grady, Eileen C. Gonzales, Thomas Henning, Dean C. Hines, Kielan K. W. Hoch, Callie E. Hood, Alex R. Howe, Markus Janson, Paul Kalas, Grant M. Kennedy, Matthew A. Kenworthy, Pierre Kervella, Daniel Kitzmann, Masayuki Kuzuhara, Anne-Marie Lagrange, Pierre-Olivier Lagage, Kellen Lawson, Cecilia Lazzoni, Ben W. P. Lew, Michael C. Liu, Pengyu Liu, Jorge Llop-Sayson, James P. Lloyd, Anna Lueber, Bruce Macintosh, Elena Manjavacas, Sebastian Marino, Mark S. Marley, Christian Marois, Raquel A. Martinez, Brenda C. Matthews, Elisabeth C. Matthews, Dimitri Mawet, Johan Mazoyer, Michael W. McElwain, Stanimir Metchev, Brittany E. Miles, Maxwell A. Millar-Blanchaer, Paul Molliere, Sarah E. Moran, Caroline V. Morley, Sagnick Mukherjee, Paulina Palma-Bifani, Eric Pantin, Polychronis Patapis, Simon Petrus, Laurent Pueyo, Sascha P. Quanz, Andreas Quirrenbach, Isabel Rebollido, Jea Adams Redai, Bin B. Ren, Emily Rickman, Matthias Samland, B. A. Sargent, Joshua E. Schlieder, Glenn Schneider, Karl R. Stapelfeldt, Ben J. Sutlieff, Motohide Tamura, Xianyu Tan, Christopher A. Theissen, Taichi Uyama, Arthur Vigan, Malavika Vasist, Johanna M. Vos, Kevin Wagner, Jason J. Wang, Kimberly Ward-Duong, Niall Whiteford, Schuyler G. Wolff, Kadin Worthen, Mark C. Wyatt, Marie Ygouf, Xi Zhang, Keming Zhang, Zhoujian Zhang, Yifan Zhou, Alice Zurlo
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L2 (2024)
We present a performance analysis for the aperture masking interferometry (AMI) mode on board the James Webb Space Telescope Near Infrared Imager and Slitless Spectrograph (JWST/NIRISS). Thanks to self-calibrating observables, AMI accesses inner work
Externí odkaz:
https://doaj.org/article/2cfadde877a840b2939806fecd9aa9bc
Autor:
Galicher, Raphaël, Mazoyer, Johan
Publikováno v:
Comptes Rendus. Physique, Vol , Iss , Pp 1-45 (2023)
Exoplanetary science is a very active field of astronomy nowadays, with questions still opened such as how planetary systems form and evolve (occurrence, process), why such a diversity of exoplanets is observed (mass, radius, orbital parameters, temp
Externí odkaz:
https://doaj.org/article/1a999b8153c44ed18aee7ef4237025d2
Autor:
Boccaletti, Anthony
Publikováno v:
Comptes Rendus. Physique, Vol , Iss , Pp 1-19 (2023)
The technological developments initiated in the early 21$^{\rm st}$ century have led to the implementation of “planet finders” instruments on 8-m class telescopes which are in operation since 2014-2015. Such facilities are at the inception of sig
Externí odkaz:
https://doaj.org/article/463f08a669d3401891f2149a45bb0889