Results 81 to 90 of about 1,728 (284)

Resident Space Object (RSO) Tracking in Space-Based, Low Resolution, Non-Constant-Attitude Imagery

Remote Sensing
Resident Space Objects (RSOs) are a collection of both man-made and natural objects in near-Earth space. Given their large orbital velocities and rapidly increasing quantity, they pose a collision threat to space assets, necessitating better Space ...
Perushan Kunalakantha, Vithurshan Suthakar, Paul Harrison, Matthew Driedger, Randa Qashoa, Gabriel Chianelli, Regina S. K. Lee   +6 more
doaj   +1 more source

Epigenetic heterogeneity and plasticity in therapy‐induced tumor states through single‐cell multi‐omics

Molecular Oncology, EarlyView.
Single‐cell multi‐omics reveals epigenetic heterogeneity across therapy‐adaptive tumor states, including quiescent/dormant, drug‐tolerant persister, and EMT‐like phenotypes. By linking regulatory features with state‐associated biomarkers, these approaches inform biomarker‐guided therapeutic strategies for evolving tumors.
Hee Jung Kim, Hwiyeong Lee, Jin Hong, Daechan Park   +3 more
wiley   +1 more source

Using the Joint Probabilistic Data Association Filter for Improving Star Trackers Performance to Accurate Attitude Determination of Spacecrafts [PDF]

فصلنامه علوم و فناوری فضایی, 2016
Automatic control of satellites and spacecrafts, has been extensively paid attention. Attitude determination is one of the most important procedures to control a spacecraft. Star trackers are widely used for attitude determining.
Ahmad Reza Sadeghi, Mohammad Farzan Sabahi, Sayed Mohamad Saberali   +2 more
doaj  

CCD star trackers

, 1975
The application of CCDs to star trackers and star mappers is considered. Advantages and disadvantages of silicon CCD star trackers are compared with those of image dissector star trackers.
Goss, W. C.
core  

On-Orbit Resident Space Object (RSO) Detection Using Commercial Grade Star Trackers [PDF]

, 2019
The resident space object (RSO) population, including both functioning satellites and on-orbit debris, has grown to the point where dedicated ground and space-based networks are needed to maintain up-to-date catalogues of their orbits.
Clemens, Samuel David
core  

Online calibration for star trackers [PDF]

, 2021
Star trackers are perhaps the most accurate means of measuring a spacecraft's orientation in space and are becoming a popular sensing instrument for attitude determination systems amongst conventional larger satellites as well as micro satellites. In order to produce and maintain high fidelity measurements, the systematic effects of lens distortion and
openaire   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

A Heavy Flavor Tracker for STAR [PDF]

, 2008
The STAR Collaboration proposes to construct a state-of-the-art microvertex detector, the Heavy Flavor Tracker (HFT), utilizing active pixel sensors and silicon strip technology. The HFT will significantly extend the physics reach of the STAR experiment for precision measurement of the yields and spectra of particles containing heavy quarks.
Chasman, C., Beavis, D., Debbe, R., Lee, J. H., Levine, M. J., Videbaek, F., Xu, Z., Kleinfelder, S., Li, S., Cendejas, R., Huang, H., Sakai, S., Whitten, C., Joseph, J., Keane, D., Margetis, S., Rykov, V., Zhang, W. M., Bystersky, M., Kapitan, J., Kushpil, V., Sumbera, M., Baudot, J., Hu-Guo, C., Shabetai, A., Szelezniak, M., Winter, M., Kelsey, J., Milner, R., Plesko, M., Redwine, R., Simon, F., Surrow, B., Van Nieuwenhuizen, G., Anderssen, E., Dong, X., Greiner, L., Matis, H. S., Morgan, S., Ritter, H. G., Rose, A., Sichtermann, E., Singh, R. P., Stezelberger, T., Sun, X., Thomas, J. H., Tram, V., Vu, C., Wieman, H. H., Xu, N., Hirsch, A., Srivastava, B., Wang, F., Xie, W., Bichsel, H.   +54 more
openaire   +4 more sources

Satellite Attitude Determination and Map Projection Based on Robust Image Matching

Remote Sensing, 2017
Small satellites have limited payload and their attitudes are sometimes difficult to determine from the limited onboard sensors alone. Wrong attitudes lead to inaccurate map projections and measurements that require post-processing correction.
Toru Kouyama, Atsunori Kanemura, Soushi Kato, Nevrez Imamoglu, Tetsuya Fukuhara, Ryosuke Nakamura   +5 more
doaj   +1 more source

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source