Results 51 to 60 of about 52,830 (299)

Modeling the Wavelength Dependence of Pixel Response Nonuniformity of a CCD Sensor

The Astronomical Journal
Precision measurements in astronomy require stringent control of systematics such as those arising from imperfect correction of sensor effects.
Zun Luo, Wei Du, Baocun Chen, Xianmin Meng, Hu Zhan   +4 more
doaj   +1 more source

ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications

Journal of Space Weather and Space Climate, 2021
Radio bursts are sensitive tracers of non-thermal electron populations in the solar corona. They are produced by electron beams and shock waves propagating through the corona and the heliosphere, and by trapped electron populations in coronal mass ...
Hamini Abdallah, Auxepaules Gabriel, Birée Lionel, Kenfack Guy, Kerdraon Alain, Klein Karl-Ludwig, Lespagnol Patrice, Masson Sophie, Coutouly Lucile, Fabrice Christian, Romagnan Renaud   +10 more
doaj   +1 more source

High-speed imaging and wavefront sensing with an infrared avalanche photodiode array [PDF]

, 2015
Infrared avalanche photodiode arrays represent a panacea for many branches of astronomy by enabling extremely low-noise, high-speed and even photon-counting measurements at near-infrared wavelengths.
Atkinson, Dani, Baranec, Christoph, Chun, Mark, Hall, Donald, Jacobson, Shane, Law, Nicholas M., Riddle, Reed   +6 more
core   +3 more sources

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Adaptive Optics for Extremely Large Telescopes

, 2019
Adaptive Optics has become a key technology for the largest ground-based telescopes currently under or close to begin of construction. Adaptive optics is an indispensable component and has basically only one task, that is to operate the telescope at its ...
Hippler, Stefan
core   +1 more source

Versatile Magneto‐Dielectric Response of Epitaxial Thin Films of the High Entropy Oxide Perovskite Nd(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3

Advanced Materials, EarlyView.
The magnetic high entropy oxide perovskite Nd(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 exhibits a substantially large dielectric constant (εr) at room temperature, which shows distinct anionic and cationic contributions in the form of zero and finite bias peaks, respectively, down to its magnetic transition temperature (Tmag).
Roxana Capu, Ryan Thompson, C. Willem Rischau, Marli R. Cantarino, Premysl Marsik, Sergey L. Bud'ko, Neven Biškup, María Varela, Yurii G. Pashkevich, Serhii M. Orel, Thomas Prokscha, Andreas Suter, Jiangtao Zhao, Ugwumsinachi Oji, Marco Bonura, Peter Bencok, Zaher Salman, Stefano Gariglio, Christian Bernhard, Subhrangsu Sarkar   +19 more
wiley   +1 more source

The Galactic centre mini-spiral in the mm-regime [PDF]

, 2012
The mini-spiral is a feature of the interstellar medium in the central ~2 pc of the Galactic center. It is composed of several streamers of dust and ionised and atomic gas with temperatures between a few 100 K to 10^4 K.
Eckart, A., Garcia-Marin, M., Karas, V., Kunneriath, D., Moultaka, J., Muzic, K., Schoedel, R., Staguhn, J., Straubmeier, C., Teuben, P., Valencia-S., M., Vogel, S. N., Zensus, J. A.   +12 more
core   +3 more sources

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

First starlight spectrum captured using an integrated photonic micro-spectrograph

, 2012
Photonic technologies have received growing consideration for incorporation into next-generation astronomical instrumentation, owing to their miniature footprint and inherent robustness.
Allington-Smith, C. Betters, Corbett, Cvetojevic, Cvetojevic, De Beck, G. Robertson, J. Bland-Hawthorn, J. S. Lawrence, Lançon, N. Cvetojevic, N. Jovanovic, Noordegraaf, Noordegraaf, Okamoto, Origlia, S. C. Ellis, Shaklan, Takahashi   +18 more
core   +1 more source

MXene‐Coated 3D Printed Horn Antennas for Ku Frequency Band

Advanced Materials Technologies, EarlyView.
An additive manufacturing approach to 3D printing horn antennas and coating them with Ti3C2Tx MXene is proposed. Rapid fabrication of lightweight, high‐performance antennas operating in the Ku‐band (12.4–18 GHz) has been demonstrated. The MXene‐coated antennas exhibit comparable electromagnetic performance to conventional, costly aluminum ones, with ...
Zahra Sarpanah Sourkouhi, Jamal Alhourani, Yury Gogotsi, Mohammad H. Zarifi   +3 more
wiley   +1 more source