Results 51 to 60 of about 5,110 (265)

Biomimetic Polymerization of Tellurocysteine: Breaking the Natural Amino Acid Radioprotection Limitation

Advanced Science, EarlyView.
Inspired by natural amino acid polymer‐melanin systems, this study strategically incorporated tellurocysteine to develop advanced radiation‐shielding materials. This approach transformed the primary interaction mechanism between melanin‐based materials and incident photons from Compton scattering to the photoelectric effect. Tellurocysteine‐polymerized
Wei Chen, Hanjie Zhu, Yue Zhang, Yuqing Qiao, Ruotong Deng, Huaping Xu, Wei Cao   +6 more
wiley   +1 more source

Prototype Development of CCD Image System for Astronomical Applications [PDF]

Journal of Astronomy and Space Sciences, 1997
We present the development process of a prototype CCD imaging system which is being built at Korea Astronomy Observatory(KA() for astronomical applications.
Jin Ho, Wonyong Han, Wuk-Won Nam, Jaewoo Lee, Woo-Baik Lee   +4 more
doaj  

Chiral‐Encoded Pt‐Ir Surfaces as Apparent Spin Filter for Enhanced Oxygen Reduction

Advanced Science, EarlyView.
The Chiral‐Induced Spin Selectivity (CISS) effect is employed in chiral‐encoded mesoporous Platinum‐Iridium (Pt‐Ir) electrocatalysts to enhance the oxygen reduction reaction (ORR). A break in spin symmetry leads to a substantial antagonistic difference in activity (>200%) when comparing two enantiomorphs of the same electrode.
Zikkawas Pasom, Krissanapat Yomthong, Sopon Butcha, Jonas Fransson, Chularat Wattanakit, Alexander Kuhn   +5 more
wiley   +1 more source

Recent Star Formation in 0.5 < z < 1.5 Quiescent Galaxies

The Astrophysical Journal Letters
Observations of massive, quiescent galaxies reveal a relatively uniform evolution: following prolific star formation in the early Universe, these galaxies quench and transition to their characteristic quiescent state in the local Universe.
Michael J. Rutkowski, Bonnabelle Zabelle, Tyler Hagen, Anahita Alavi, Seth Cohen, Christopher Conselice, Norman Grogin, Yicheng Guo, Matthew Hayes, Sugata Kaviraj, Anton Koekemoer, Ray A. Lucas, Kameswara Bharadwaj Mantha, Alec Martin, Vihang Mehta, Bahram Mobasher, Nimish Hathi, Zhiyuan Ji, Kalina V. Nedkova, Robert O’Connell, Marc Rafelski, Claudia Scarlata, Harry I. Teplitz, Xin Wang, Rogier Windhorst, L. Y. Aaron Yung, The UVCANDELS Team   +26 more
doaj   +1 more source

Lunar‐Based Photothermal CO2 Reduction Strategy: Self‐Evolving Transient Active Interface and Band Engineering

Advanced Science, EarlyView.
A self‐evolving Pd/Ov‐FeTiO3 photothermal catalyst, inspired by lunar soil, enables efficient extraterrestrial CO2 conversion. The formation of transient active interfaces and oxygen vacancies extends light absorption to the infrared range and optimizes electron transfer.
Yahang Wang, Yuhuan Li, Quanxin Wang, Deng Li, Pakkin Leong, Meng Wang, Shi Feng, Runyang Mo, Xianjin Shi, Xiaohui Li, Gangqiang Zhu, Chipui Tang   +11 more
wiley   +1 more source

Was there a (Super)nova in 1408?

The Astronomical Journal
The 1408 CE “guest star” recorded in Chinese historical texts presents a compelling case for identifying a historical stellar transient. While previous studies debated its nature as a meteor, comet, or nova, we reevaluate the event using original Ming ...
Boshun Yang, Nikolaus Vogt, Susanne M Hoffmann, (AAS Journals Data Editors)   +3 more
doaj   +1 more source

Far-ultraviolet to Near-infrared Observations of SN 2023ixf: A High-energy Explosion Engulfed in Complex Circumstellar Material

The Astrophysical Journal Letters, 2023
We present early-phase panchromatic photometric and spectroscopic coverage spanning the far-ultraviolet to near-infrared regime of the nearest hydrogen-rich core-collapse supernova (SN) in the last 25 yr, SN 2023ixf.
Rishabh Singh Teja, Avinash Singh, Judhajeet Basu, G. C. Anupama, D. K. Sahu, Anirban Dutta, Vishwajeet Swain, Tatsuya Nakaoka, Utkarsh Pathak, Varun Bhalerao, Sudhanshu Barway, Harsh Kumar, Nayana A. J., Ryo Imazawa, Brajesh Kumar, Koji S. Kawabata   +15 more
doaj   +1 more source

In Situ Pseudo‐Halide Diffusion Enables Buried Interface Regulation and Crystallinity Enhancement in Perovskite Solar Cells

Advanced Science, EarlyView.
Thermally activated LiHCOO induces in situ pseudo‐halide diffusion, promoting buried interface strain release and perovskite crystallization. The monoclinic LiHCOO phase forms an open framework structure that enhances HCOO− diffusion and drives interfacial restructuring.
Chao Gao, Li He, Changjiang Li, Long Fang, Wenzhong Shen   +4 more
wiley   +1 more source

Classification of a New X-Ray Catalog of Likely Counterparts to 4FGL-DR4 Unassociated Gamma-Ray Sources Using a Neural Network

The Astrophysical Journal
Our survey of the fourth Fermi Large Area Telescope catalog (4FGL) unassociated gamma-ray source regions using the X-Ray Telescope (XRT) and Ultraviolet/Optical Telescope (UVOT) on board the Neil Gehrels Swift Observatory (Swift) provides new XRT and ...
Kyle D. Neumann, Abraham D. Falcone, Stephen DiKerby, Sierra Deppe, Elizabeth C. Ferrara, Jamie A. Kennea, Brad Cenko, Eric Grove   +7 more
doaj   +1 more source

The LUVOIR Ultraviolet Multi-Object Spectrograph (LUMOS): Instrument Definition and Design

, 2017
22 pages, 16 figures. Proc SPIE 2017; 10397-39International audienceThe Large Ultraviolet / Optical / Infrared Surveyor (LUVOIR) is one of four large mission concepts currently undergoing community study for consideration by the 2020 Astronomy and ...
Moustakas, Leonidas A., Mccandliss, Stephan, Harris, Walter, John O'Meara, Stephan R. McCandliss, Garcia, Miriam, Evans, Christopher J., O'Meara, John, David Schiminovich, Fleming, Brian T., Bouret, Jean-Claude, Bolcar, Matthew R., Fleming, Brian, Pascucci, Ilaria, O'Meara, John M., Rigby, Jane, France, Kevin, Bolcar, Matthew, Leonidas A. Moustakas, Moustakas, Leonidas, A., Garrett J. West, Moustakas, Leonidas,, Brian T. Fleming, West, Garrett, Tumlinson, Jason, Schiminovich, David, West, Garrett J., Matthew R. Bolcar, McCandliss, Stephan R., France, Kevin C., Siegmund, Oswald, Kevin C. France, Jane Rigby, Walter M. Harris, Ilaria Pascucci, Harris, Walter M., Jason Tumlinson   +36 more
core   +1 more source