Results 41 to 50 of about 635,631 (297)

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

open access: yesFEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure   +3 more
wiley   +1 more source

Intelligent Star Tracker [PDF]

open access: yes, 2000
We describe our Intelligent Star Tracker System. Our Intelligent Star Tracker System incorporates an adaptive optic catadioptric telescope in a silicon carbide housing.
Clark, Natalie   +2 more
core   +1 more source

A Survey of Lost-in-Space Star Identification Algorithms Since 2009

open access: yesSensors, 2020
The lost-in-space star identification algorithm is able to identify stars without a priori attitude information and is arguably the most critical component of a star sensor system.
David Rijlaarsdam   +5 more
doaj   +1 more source

Star tracker calibration [PDF]

open access: yes, 1968
Optical star tracker calibration ...
Draper, L. T.
core  

Performance studies of the CMS strip tracker before installation [PDF]

open access: yes, 2008
This is the Pre-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2009 IOPIn March 2007 the assembly of the Silicon Strip Tracker was completed at the Tracker Integration Facility at CERN ...
Brom J-   +999 more
core   +1 more source

Biophysical approaches for studying viral entry

open access: yesFEBS Letters, EarlyView.
Viruses infect all living organisms and have been responsible for major epidemics and pandemics. Their ongoing evolutionary battle with host defenses creates a constant need for improved tools to study viral behavior. Advancing methods to probe viral attachment, fusion, and genome release deepen our understanding of how infections begin and support the
Inbar Yosibash, Raya Sorkin
wiley   +1 more source

A Robust Star Identification Algorithm Based on a Masked Distance Map

open access: yesRemote Sensing, 2022
The authors of this paper propose a robust star identification algorithm for a ‘Lost-In-Space’-mode star tracker for lost-cost CubeSat missions. A two-step identification framework and an embedded validation mechanism were designed to accelerate the ...
Hao Yuan, Dongxu Li, Jie Wang
doaj   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

open access: yesFEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace   +6 more
wiley   +1 more source

A Survey on Star Identification Algorithms

open access: yesAlgorithms, 2009
The author surveys algorithms used in star identification, commonly used in star trackers to determine the attitude of a spacecraft. Star trackers are a staple of attitude determination systems for most types of satellites.
Daniele Mortari, Benjamin B. Spratling
doaj   +1 more source

The MONS Star Trackers

open access: yes, 2000
The MONS satellite will have two Star Trackers to sense the spacecraft attitude, and we plan to use them as scientific instruments to perform high-precision photometry of thousands of stars. We briefly describe the current plans for the Star Trackers and their expected capabilities.
Bedding, Timothy R., Kjeldsen, Hans
openaire   +2 more sources

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