Results 61 to 70 of about 115,932 (268)

Kepler-68: Three Planets, One With a Density Between That of Earth and Ice Giants

, 2013
NASA's Kepler Mission has revealed two transiting planets orbiting Kepler-68. Follow-up Doppler measurements have established the mass of the innermost planet and revealed a third jovian-mass planet orbiting beyond the two transiting planets. Kepler-68b,
Basu, Sarbani, Buchhave, Lars A., Chaplin, William J., Charbonneau, David, Christensen-dalsgaard, Jørgen, Désert, Jean-michel, Elsworth, Yvonne, Ford, Eric B., Fortney, Jonathan J., Fressin, Francois, Gilliland, Ronald L., Haas, Michael R., Handberg, Rasmus, Hekker, Saskia, Henze, Christopher E., Howard, Andrew W., Howell, Steve B., Huber, Daniel, Isaacson, Howard, Jenkins, Jon M., Karoff, Christoffer, Kjeldsen, Hans, Lissauer, Jack J., Lopez, Eric D., Lund, Mikkel N., Lundkvist, Mia, Marcy, Geoffrey W., Metcalfe, Travis S., Miglio, Andrea, Ragozzine, Darin, Rogers, Leslie, Rowe, Jason F., Thompson, Susan E., Torres, Guillermo   +33 more
core   +1 more source

Diffractive Synthesis of Multipole Interference States Using Low‐Index Mesoscale Dielectric Structures

Advanced Photonics Research, EarlyView.
Multipole interference (MPI) plays pivotal roles in electromagnetics. In optics, it has been realized typically with the Mie resonance in high‐index, deep‐subwavelength‐scale dielectric resonators. A new, diffraction‐based MPI scheme is proposed and demonstrated with low‐index, mesoscale dielectric structures.
Rabiul Islam Sikder, Myung Gi Ji, Jaeyoun Kim   +2 more
wiley   +1 more source

Constraining the Densities of the Three Kepler-289 Planets with Transit Timing Variations

The Astronomical Journal, 2023
Kepler-289 is a three-planet system containing two sub-Neptunes and one cool giant planet orbiting a young, Sun-like star. All three planets exhibit transit timing variations (TTVs), with both adjacent planet pairs having orbital periods close to the 2:1
Michael Greklek-McKeon, Heather A. Knutson, Shreyas Vissapragada, Daniel Jontof-Hutter, Yayaati Chachan, Daniel Thorngren, Gautam Vasisht   +6 more
doaj   +1 more source

Highlights of Discoveries for δ Scuti Variable Stars From the Kepler Era

Frontiers in Astronomy and Space Sciences, 2021
The NASA Kepler and follow-on K2 mission (2009–2018) left a legacy of data and discoveries, finding thousands of exoplanets, and also obtaining high-precision long time-series data for hundreds of thousands of stars, including many types of pulsating ...
Joyce Ann Guzik
doaj   +1 more source

Special Robotic Stylet for Assisting Endotracheal Intubation Based on Multisegment Continuum Mechanism

Advanced Intelligent Systems, EarlyView.
A robotic stylet is proposed based on a multisegment continuum mechanism for specialized assisting endotracheal intubation. Its geometric parameters are designed based on medical images and kinematic is derived. A prototype is fabricated, and its kinematics and application are experimentally verified. These robotic systems can improve accurate, secure,
Jiangzhen Guo, Jianan Zhang, Xianglong Li, Mingya Wang, Xiang Li, Xiangyang Guo, Yongzheng Han, Chunjing Tao, Yubo Fan   +8 more
wiley   +1 more source

A two‐dimensional morphospace for cyanobacteria and microalgae: Morphological diversity, evolutionary relatedness, and size constraints

Freshwater Biology, Volume 68, Issue 1, Page 115-126, January 2023., 2023
Abstract Body metrics are considered as master traits that regulate physiological, behavioural and life history features of planktic cyanobacteria and microalgae. Although the distribution of their morphological traits reflects the various trade‐offs and strategies needed for survival in pelagic habitats, previous methods for quantifying phytoplankton ...
Gábor Borics, Gábor Várbíró, János Falucskai, Zsolt Végvári, Enikő T‐Krasznai, Judit Görgényi, Viktória B‐Béres, Verona Lerf   +7 more
wiley   +1 more source

ALGEBRAIC DESCRIPTION OF SHAPE INVARIANCE REVISITED

Acta Polytechnica, 2017
We revisit the algebraic description of shape invariance method in one-dimensional quantum mechanics. In this note we focus on four particular examples: the Kepler problem in flat space, the Kepler problem in spherical space, the Kepler problem in ...
Satoshi Ohya
doaj   +1 more source

Entre considerações físicas e geométricas: um estudo sobre as hipóteses astronômicas na primeira parte da obra Astronomia Nova de Johannes Kepler

Revista Brasileira de Ensino de Física, 2022
Este artigo tem por objetivo apresentar um estudo sobre alguns aspectos geométricos e físicos na primeira parte da obra Astronomia Nova de 1609, tendo em vista fornecer subsídios aos professores que queiram abordar a história da astronomia em suas ...
L. P. G. Menezes, M. C. Batista
doaj   +1 more source

α‐Aminierung von 1,3‐Dicarbonylverbindungen und ähnlich‐reaktiven Enolatvorstufen mit Ammoniak unter oxidativen Bedingungen

Angewandte Chemie, EarlyView.
Die Verwendung von Ammoniak in Kombination mit Hypochloriten als einfache Oxidationsmittel unter Phasentransferbedingungen ermöglicht die direkte oxidative α‐Aminierung von reaktiven Enolatvorstufen wie cyclischen β‐Ketoestern, Oxindolen sowie Malonitrilen und Malonaten in guten bis exzellenten Ausbeuten.
Christopher Mairhofer, Katharina Röser, Gabriel Burel, Sarah Merzinger, Jean‐François Brière, Roland Obermüller, Mario Waser   +6 more
wiley   +1 more source

Correlation between AV synchrony and device collected AM‐VP sequence counter in atrioventricular synchronous leadless pacemakers: A real‐world assessment

Journal of Cardiovascular Electrophysiology, Volume 34, Issue 1, Page 197-206, January 2023., 2023
Abstract Introduction Micra atrioventricular (AV) provides leadless atrioventricular synchronous pacing by sensing atrial contraction (A4 signal). Real‐world operation and reliability of AV synchrony (AVS) assessment using device data have not been described.
Christophe Garweg, Jonathan P. Piccini, Laurence M. Epstein, Camille Frazier‐Mills, Larry A. Chinitz, Clemens Steinwender, Kurt Stromberg, Todd Sheldon, Dedra H. Fagan, Mikhael F. El‐Chami   +9 more
wiley   +1 more source