Results 61 to 70 of about 300,638 (255)

EXERCÍCIOS ENVOLVENDO A MAGNITUDE LIMITE NO ENSINO DE ASTRONOMIA

Ensaio Pesquisa em Educação em Ciências, 2010
We present a set of exercises and activities, designed for Basic Astronomy disciplines and inspired by Ausubel¿s multi-contextual approach, relating the limit magnitude concept to the light catching power of an optical instrument.
Lev Vertchenko, Tomás de Aquino Silveira   +1 more
doaj  

Radial Velocities as an Exoplanet Discovery Method

, 2017
The precise radial velocity technique is a cornerstone of exoplanetary astronomy. Astronomers measure Doppler shifts in the star's spectral features, which track the line-of/sight gravitational accelerations of a star caused by the planets orbiting it ...
B Campbell, C Chubak, D Queloz, D Queloz, DA Fischer, DW Latham, FA Pepe, GW Marcy, H Kjeldsen, I Boisse, JF Kasting, JL Bean, JT Wright, M Mayor, RP Butler, RP Butler, WJ Borucki, X Dumusque   +17 more
core   +1 more source

Weakly‐Coordinating Non‐Fluorinated Diluents for Local High‐Concentration Electrolytes in Advanced Lithium Metal Batteries

Advanced Materials, EarlyView.
This perspective critically evaluates non‐fluorinated diluents in local high‐concentration electrolytes, categorizing their solvation behavior, interfacial mechanisms, and sustainability potential to guide future electrolyte design for lithium metal batteries.
Yin Cui, Xinrui Li, Nan Jiang, Xinyan Huang, E. Lora da Silva, Ruo Zhao, Tao Yang, Qingxia Liu, Xidong Lin   +8 more
wiley   +1 more source

Magnetically Actuated Drops‐on‐Stilts Microrobots for Transport and Delivery of Hydrophobic Cargo

Advanced Materials Interfaces, EarlyView.
Iron oxide nanoparticles and oil droplets in external magnetic fields form “drops‐on‐stilts” microrobots that transport hydrophobic cargo. Tunable nanoparticle–droplet interactions generate stilt‐like structures. Field rotation enables walking, obstacle navigation, and collective motion.
Oluwafemi Ligan, Hrishabh Singh, Sahil Kulkarni, Hong Huy Tran, James M. Kikkawa, Daeyeon Lee, Ravi Radhakrishnan, Edward Steager, Hyun Koo, Kathleen Stebe   +9 more
wiley   +1 more source

OBTAINING POSITIONS OF ASTEROIDS FROM DIGITIZED PROCESSING OF PHOTOGRAPHIC OBSERVATIONS IN BALDONE OBSERVATORY (CODE 069)

Odessa Astronomical Publications, 2016
Digital processing of photographic plates of star fields allows to determine with high accuracy the coordinates and stellar magnitudes for all registered objects on these plates.
I. Eglitis, M. Eglite, S. V. Shatokhina, V. M. Andruk   +3 more
doaj   +1 more source

PILOT and cosmic shear

, 2008
Cosmic shear offers a remarkbly clean way to measure the equation of state of the Universe and its evolution. Resolution over a wide field is paramount, and Antarctica offers unique possibilities in this respect.
Saunders, W.
core   +1 more source

Layered Nanoporous Platforms for SERS Sensing

Advanced Materials Interfaces, EarlyView.
Here, we present a detailed investigation of the SERS performance of layered nanoporous metals. The controlled deposition of well‐defined, stacked porous layers enabled a systematic analysis of the effects of multimetallic systems in SERS experiments. Numerical models are also used to support the experimental findings.
Yanqiu Zou, Anastasiia Sapunova, Tommaso Giovannini, Chen Wang, Huaizhou Jin, Vincenzo Caligiuri, Sergio Marras, Andrea Schirato, Luca Bursi, Alessandro Alabastri, Shukun Weng, Ali Douaki, German Lanzavecchia, Ivan Marri, Roman Krahne, Nicolò Maccaferri, Zhenrong Zheng, Shangzhong Jin, Denis Garoli   +18 more
wiley   +1 more source

Expanding the High-z Supernova Frontier: “Wide-area” JWST Discoveries from the First 2 yr of COSMOS-Web

The Astrophysical Journal
Transient astronomy of the early Universe ( z  ≳ 2) remains largely unexplored, lying beyond the rest-frame optical spectroscopic reach of most current observatories.
Ori D. Fox, Armin Rest, Justin D. R. Pierel, David A. Coulter, Caitlin M. Casey, Jeyhan S. Kartaltepe, Hollis B. Akins, Maximilien Franco, Mike Engesser, Conor Larison, Takashi J. Moriya, Robert M. Quimby, Marko Shuntov, Matthew R. Siebert, Christa DeCoursey, Rodrigo Angulo, James M. DerKacy, Nicole E. Drakos, Eiichi Egami, Steven L. Finkelstein, Carter Flayhart, Seiji Fujimoto, Estefania Padilla Gonzalez, Massimo Griggio, Santosh Harish, Olivier Ilbert, Kohei Inayoshi, Anton M. Koekemoer, Vasily Kokorev, Clotilde Laigle, Erini Lambrides, Rebecca L. Larson, Xiaolong Li, Daizhong Liu, Georgios E. Magdis, Jacqueline E. McCleary, Henry J. McCracken, Nicolas McMahon, Jed McKinney, Thomas Moore, Louise Paquereau, Jason Rhodes, Brant E. Robertson, David B. Sanders, Sogol Sanjaripour, Koji Shukawa, Louis-Gregory Strolger, Sune Toft, Qinan Wang, Robert E. Williams, Yossef Zenati   +50 more
doaj   +1 more source

Linking Device Performance to Nanoscale Photoactivation of Grain Boundaries in 2D Hybrid Halide Perovskites

Advanced Materials Technologies, EarlyView.
The opto‐electronic response of polycrystalline (PEA)2PbBr4 thin films is investigated by correlating macroscopic photodetector performance with nanoscale mapping techniques. Grain boundary density is systematically tuned through crystallization control and linked to device responsivity.
Camilla Bordoni, Lorenzo Calcaterra, Andrea Ciavatti, Silvia Milita, Valentina Bonino, Lorenzo Margotti, Sara Cepić, Marisa Di Sabatino, Federico Boscherini, Daniela Cavalcoli, Beatrice Fraboni   +10 more
wiley   +1 more source

Revisiting the optical depth of spiral galaxies using the Tully-Fisher B relation

, 2008
Aims. We attempt to determine the optical depth of spiral galaxy disks by a statistical study of new Tully-Fisher data from the ongoing KLUN+ survey, and to clarify the difference between the true and apparent behavior of optical depth. Methods.
Hanski, M., Kankare, E., Teerikorpi, P., Theureau, G.   +3 more
core   +3 more sources