Results 51 to 60 of about 3,309 (287)

Precise CCD astrometric observations of minor planets and comets at the Belgrade observatory during 1997 [PDF]

open access: yes, 1998
73 precise astrometric positions of seven comets and two minor planets from MPC critical list - 1093 Freda and 4954 Eric - were obtained with the CCD equipped Askania astrograph (13.5/160) of Belgrade Astronomical Observatory.
Benishek Vl., Protitch-Benishek V.
core   +1 more source

On the precision of the ephemerides of selected minor planets derived not taking into account their mutual perturbations [PDF]

open access: yes, 1988
Методом численного интегрирования уравнений движения изучены возмущения гео-центрических координат избранных малых планет от Цереры, Паллады, Юноны и Весты.
Федий П.М.
core   +5 more sources

Wood‐Derived Nanocellulose‐Biocarbon Fresnel‐Zone Plate Lenses for Sub‐THz Frequency Applications

open access: yesAdvanced Materials Technologies, EarlyView.
Wood‐derived nanocellulose and lignin‐based biocarbon were combined to fabricate fully bio‐based Fresnel zone plate (FZP) lenses for sub‐terahertz frequencies. These sustainable FZP lenses exhibit low dielectric loss and high directivity, achieving performance comparable to that of metallic references, and remain functional under environmental stress ...
Riikka Haataja   +9 more
wiley   +1 more source

Dictionary of Minor Planet Names [PDF]

open access: yes, 2012
The quantity of numbered minor planets has now well exceeded a quarter million. The new sixth edition of the Dictionary of Minor Planet Names, which is the IAU’s official reference work for the field, now covers more than 17,000 named minor planets.
Schmadel, Lutz
core   +1 more source

3D‐Printed Dual‐Doped Ag2Se‐Based Thermoelectric Films With Enhanced Thermal Stability

open access: yesAdvanced Materials Technologies, EarlyView.
Sb–Se dual doping enhances the thermal stability of Ag2Se‐based thermoelectric systems. The compositionally tuned nano‐ink is printed into flexible films by direct ink writing (DIW), retaining improved thermoelectric properties after annealing up to 400°C.
Ahasun Habib Hridoy   +8 more
wiley   +1 more source

A possible impact lull in the middle of the Eratosthenian period suggested by the Chang’e-5 and 6 missions

open access: yesAstronomy & Astrophysics
Context. It was generally believed that lunar impact flux over the past 3.5 billion years has been almost constant. However, there are still considerable age gaps, causing the evolution of impact flux to remain elusive.
Xie Minggang, Li Yan
doaj   +1 more source

Observational data and orbits of the asteroids discovered at the Molėtai Observatory in 2010–2012

open access: yesOpen Astronomy, 2017
This paper is devoted to the discovery of asteroids at the Molėtai Astronomical Observatory (MAO) in 2010- 2012 together with the orbital analysis of two dynamically interesting Near Earth Objects (NEOs) discovered at the MAO, namely 2006 SF77 and 2010 ...
Włodarczyk Ireneusz   +2 more
doaj   +1 more source

Intelligent Maintenance Review for Robots: Multimodal Information, Deep Diagnosis and Embodied Artificial Intelligence

open access: yesAdvanced Robotics Research, EarlyView.
This review maps the methods to monitor robots’ health by fusing vibration, sound, control signals, vision, force, and oil information with artificial intelligence. It identifies deep learning, transfer learning, digital twins, and physics‐informed models as key methodological pathways enabling earlier diagnosis, safer human–robot collaboration, and ...
Yuting Qiao   +6 more
wiley   +1 more source

Dictionary of Minor Planet Names [PDF]

open access: yes, 2007
Dictionary of Minor Planet Names, Fifth Edition, is the official reference for the field of the IAU, which serves as the internationally recognised authority for assigning designations to celestial bodies and any surface features on them.
Schmadel, Lutz D
core   +1 more source

Observational data and orbits of the asteroids discovered at the Baldone Observatory in 2015–2018

open access: yesOpen Astronomy, 2020
This paper is devoted to the discovery of 37 asteroids at the Baldone Astrophysical Observatory (MPC 069) from 2015 to 2018, and one of dynamically interesting Mars-crosser (MC) observed at the Baldone Astrophysical Observatory, namely 2008 LX16.
Wlodarczyk Ireneusz   +2 more
doaj   +1 more source

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