Results 51 to 60 of about 4,967 (311)

Osservazioni astronomiche con veicoli spaziali

open access: yesAnnals of Geophysics, 1963
A survey is given on the most important astronomical<br />and astrophysical problema, and expecially the solar ones, which need an<br />essential contribution from observations made by artiflcial satellites.
M. CIMINO
doaj   +1 more source

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

open access: yesJournal 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   +10 more
doaj   +1 more source

Measuring the Hall Effect in Hysteretic Materials

open access: yesAdvanced Materials, EarlyView.
The authors highlight common pitfalls in measuring the Hall effect: in hysteretic magnets, improper data processing can create signals that look exotic but are not real. This Perspective explains the origin of these artifacts and presents practical measurement strategies that help researchers identify reliable Hall responses in complex magnetic ...
Jaime M. Moya   +6 more
wiley   +1 more source

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

open access: yesThe Astronomical Journal
Precision measurements in astronomy require stringent control of systematics such as those arising from imperfect correction of sensor effects.
Zun Luo   +4 more
doaj   +1 more source

Astrophotonic Spectrographs

open access: yesApplied Sciences, 2019
Astrophotonics is the application of photonic technologies to channel, manipulate, and disperse light from one or more telescopes to achieve scientific objectives in astronomy in an efficient and cost-effective way.
Pradip Gatkine   +2 more
doaj   +1 more source

Solvent‐Guided Chiral Assemblies and Chemical Doping of OEG‐Functionalized Conjugated Polymers

open access: yesAdvanced Materials, EarlyView.
Solvent‐dependent aggregation pathways dictate whether conjugated polymers form chiral lyotropic liquid‐crystalline assemblies or achiral packed aggregates. Mapping solvent‐controlled β₁ and β2 states reveals that weaker backbone association favors β₁ aggregates and reorganizable twisted mesophases, whereas stronger backbone association favors β2 ...
Sanghyun Jeon   +10 more
wiley   +1 more source

About scientific schools in the Nikolaev Astronomical Observatory in the fields of positional astronomy and astronomical instrumentation [PDF]

open access: yes, 2005
The Nikolaev Astronomical Observatory (NAO) was founded in 1821. In the initial “naval” time of its growth the observatory also carried out some works of an astronomical character.
Shulga, A.V.   +2 more
core  

GUAIX: The UCM Group of Extragalactic Astrophysics and Astronomical Instrumentation [PDF]

open access: yes, 2010
© Springer-Verlag Berlin Heidelberg 2010. Scientific Meeting of the Spanish-Astronomical-Society (SEA) (8th; 2008; Santander, Spain). This work has been supported by the Spanish Ministry of Education and Science through the research projects AYA2006 ...
Gil De Paz, Armando   +9 more
core   +1 more source

An Ultra‐Reliable and Highly Sensitive Flexible Piezoelectric Pressure Sensor Based on Vertically Aligned Gallium Nitride Microrod Arrays on Graphene

open access: yesAdvanced Materials Interfaces, EarlyView.
A flexible and highly reliable piezoelectric pressure sensor based on GaN p–n homojunction microrod arrays on graphene is demonstrated. The sensor exhibits high sensitivity, rapid response, excellent cyclic durability, and stable performance after thermal aging and PBS immersion, highlighting its potential for harsh‐environment and biomedical pressure ...
Asad Ali   +5 more
wiley   +1 more source

Optimising the NAOMI adaptive optics real-time control system [PDF]

open access: yes, 2008
This thesis describes the author's research in the field of Real-Time Control (RTC) for Adaptive Optics (AO) instrumentation. The research encompasses experiences and knowledge gained working in the area of RTC on astronomical instrumentation projects ...
Goodsell, S. J., Goodsell, S J
core  

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