Results 41 to 50 of about 200,425 (305)

PracticalAstronomyCrew/telescope-models: Aperture Obstruction Models

, 2021
The initial release of the code and 3D models used for modeling the obstruction of the aperture(s) of the Gratama telescope by the hemispherical dome of the Blaauw ...
Jake Noel-Storr, Mick Veldhuis
core   +1 more source

Pointlike Material Accumulation and Displacement in Azopolymer Thin Films Driven by Spatial Light Modulation

Advanced Optical Materials, EarlyView.
A maskless, SLM‐driven approach enables the deterministic inscription of arbitrary topographical features in azopolymer films by mapping complex vectorial light fields onto local viscoplastic stress. This platform allows for the rapid generation and dynamic erasure of high‐aspect‐ratio micro‐spikes, offering a versatile tool for reconfigurable flat ...
Jonas Strobelt, Nikolai Liubimtsev, Marina Saphiannikova, Svetlana Santer   +3 more
wiley   +1 more source

From Rigid to Soft Robotic Approaches for Neuroendoscopy

Advanced Robotics Research, EarlyView.
Robotic assistance has had minimal impact on deep intraventricular surgeries, where small‐scale, precision, and reduced invasiveness can contribute to improved patient outcomes. Emerging technologies in rigid, soft, and hybrid robotics are reviewed to identify the most promising mechanisms for deep brain navigation in addition to an attempt to identify
Kieran Gilday, Irena Zubak, Andreas Raabe, Josie Hughes   +3 more
wiley   +1 more source

IMF dependence of the open-closed field line boundary in Saturn's ionosphere, and its relation to the UV auroral oval observed by the Hubble Space Telescope [PDF]

, 2007
We study the dependence of Saturn's magnetospheric magnetic field structure on the interplanetary magnetic field (IMF), together with the corresponding variations of the open-closed field line boundary in the ionosphere.
Badman, S. V., Grigoryan, M. S., Cowley, S. W. H., Alexeev, I. I., Belenkaya, E. S., Kalegaev, V. V., Blokhina, M. S.   +6 more
core   +4 more sources

Hybrid Continuum Robot Designs and Architectures for Healthcare Applications

Advanced Robotics Research, EarlyView.
Hybrid continuum robots represent an emerging class of flexible manipulators that blend materials, structures, and actuation concepts from the established fields of soft and continuum robotics. This review introduces an accessible framework to distinguish key hybridization approaches, surveys current designs aimed at complex clinical applications, and ...
Burak Ozdemir, Muhammad A. Khalid, Manish Chauhan, Pietro Valdastri, James H. Chandler   +4 more
wiley   +1 more source

Compact Optical Visual Magnification System with a Wide Field of View

Sensors
A new concept for designing a visual magnification system is introduced. In this concept, apart from the conventional objective and the eyepiece group lenses in the system, an additional Power-Corrector (PC) group of lenses is introduced in the optical ...
Uri Milman, Jacob Kaufmann, Yoel Arieli
doaj   +1 more source

The Planck Telescope

AIP Conference Proceedings, 2002
In this paper we present an overview of the Telescope designed for ESA's mission dedicated to map the Cosmic Microwave Background Anisotropies and Polarization. Two instruments, LFI and HFI, operate in an overall frequency range between 25 and 900 GHz and share the focal region of the 1.5 meter optimized telescope.
F. Villa, M. Bersanelli, C. Burigana, R. C. Butler, N. Mandolesi, A. Mennella, G. Morgante, M. Sandri, L. Terenzi, L. Valenziano   +9 more
openaire   +2 more sources

CD9+ B Cells Induce T Follicular Helper Cell Apoptosis to Regulate Germinal Center Regression

Advanced Science, EarlyView.
A unique subset of CD9+ B cells regulates germinal center B (GC‐B) cell regression by inducing T follicular helper (Tfh) cell apoptosis through multiple signaling pathways, such as ALCAM‐CD6. FOXP1 plays a key role in GC‐B cell differentiation. These findings clarify mechanisms of GC degeneration and termination and offer potential targets for adenoid ...
Wenjing Liao, Lijuan Song, Meiqian Xu, Tianhao Liang, Yixuan Chen, Gui Chen, Zaihuan Lin, Huakang Du, Guofei Feng, Zhiming Feng, Qi Zhang, Fan Pan, Saixuan Yang, Xinyin Zhang, Wenxu Peng, Tianlong Li, Zhuoshen Lin, Yabang Chen, Jiayi Liu, Baoxin Peng, Yan Liu, Xing Niu, Ting Li, Chengyu Huang, Ke Mo, Jianlei Xie, Yu Zou, Xiaowen Zhang   +27 more
wiley   +1 more source

Adaptation and Mechanical Validation of a COTS Telescope for LEO Hyperspectral Imaging Using an Additively Manufactured Structure

Applied Sciences
Small satellites provide cost-effective platforms for environmental monitoring. Open-source commercial off-the-shelf (COTS) hyperspectral payloads, such as those launched with HYPSO-1 and -2, have a ground sampling distance (GSD) of 100 m.
Henrik H. Øvrebø, Brage Sterkeby Hole, Henrik Pedersen Hauge, Martin Steinert, Anna Olsen, Fred Sigernes, Joseph L. Garrett   +6 more
doaj   +1 more source

The 50 cm telescope of Hoa Lac observatory: an introduction

Vietnam Journal of Science, Technology and Engineering, 2022
The Vietnam National Space Center has recently established an observatory in Hoa Lac, near Ha Noi. The observatory is equipped with a 50 cm diameter Ritchey-Chrétien optical telescope.
Nguyen Thi Thao, Mai Thuy Dung, Pham Vu Loc, Nguyen Thi Kim Ha, Pham Ngoc Diep, Pierre Darriulat   +5 more
doaj   +1 more source