Results 41 to 50 of about 1,206 (204)

Accurate Star Centroid Detection for the Advanced Geosynchronous Radiation Imager of Fengyun-4A

IEEE Access, 2018
Star observation can be used for the image navigation of certain instruments aboard the three-axis stabilized geostationary satellites. How to extract the accurate star centroids in the observed star images is one of the key problems.
Haopeng Zhang, Yi Su, Jian Shang, Lei Yang, Bowen Cai, Chengbao Liu, Jing Wang, Shengxiong Zhou, Zhiqing Zhang   +8 more
doaj   +1 more source

A Macrocyclic Bistriazene: Stabilization of the [Ni(Py)2]2+ Complex Cation with 6,15,23,32−Tetraethoxycarbonyl−bis(tolanetriazenediide) Ion as Ligand

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
The arrangement of the complex molecules [Ni((4,4′−EtO(CO)2tolaneN3)2(py)2] and pyridine as crystallization solvate in the solid state based on nonbonded intermolecular interactions such CH⋅⋅⋅py, CH⋅⋅⋅O and CH⋅⋅⋅HC contacts is discussed in this work.
Aline Joana Rolina Wohlmuth Alves dos Santos, Johannes Beck, Manfredo Hörner, Daniel Felipe Pietezak, Robson da Silva Oliboni, Petra Krieger‐Beck, Gertrud Dittmann   +6 more
wiley   +1 more source

Liquid Atmospheric Pressure MALDI (LAP‐MALDI) Mass Spectrometry: A Versatile Tool for the Characterization of Synthetic Polymers

Rapid Communications in Mass Spectrometry, Volume 40, Issue 16, 30 August 2026.
ABSTRACT Rationale Liquid atmospheric pressure matrix‐assisted laser desorption/ionization (LAP‐MALDI) mass spectrometry (MS) has previously been applied to the analysis of biopolymers such as peptides, proteins, and DNA, producing ESI‐like multiply charged analyte ions.
Agata E. Kowalczyk, Jeffery Brown, Michael Morris, Rainer Cramer   +3 more
wiley   +1 more source

A Step‐by‐Step Protocol From METASPACE to Biological Interpretation

Journal of Mass Spectrometry, Volume 61, Issue 7, July 2026.
ABSTRACT Mass spectrometry imaging (MSI) represents an exceptional tool for exploring complex biological systems spatially at the molecular level. However, its multidimensional nature and large data outputs make it challenging to extract meaningful biological insights. Advancements such as the METASPACE platform allow researchers to efficiently process,
Abigail Moreno‐Pedraza, Brittney Gorman, Marija Velickovic, Max Bentelspacher, Jaime Barros, Dusan Velickovic, Christopher R. Anderton   +6 more
wiley   +1 more source

Predictive Centroiding for Single and Multiple FOVs Star Trackers [PDF]

, 2020
Star centroiding, locating the star image center in a CCD image, is a fundamental process for any star tracker. In this paper, the approximate location of the stars in successive image frames are predicted using the angular velocity as provided by the ...

core  

The Gibbs Centroid Sampler [PDF]

Nucleic Acids Research, 2007
The Gibbs Centroid Sampler is a software package designed for locating conserved elements in biopolymer sequences. The Gibbs Centroid Sampler reports a centroid alignment, i.e. an alignment that has the minimum total distance to the set of samples chosen from the a posteriori probability distribution of transcription factor binding-site alignments.
William A. Thompson, Lee Aaron Newberg, Sean Conlan, Lee Ann McCue, Charles E. Lawrence   +4 more
openaire   +2 more sources

Endophyte‐induced systemic spatial reprogramming of metabolism in Populus trichocarpa roots under drought

New Phytologist, Volume 251, Issue 1, Page 438-454, July 2026.
Summary Beneficial, facultative endophytes help plants thrive in challenging environments by altering their host's metabolism, but how these cellular scale metabolic changes propagate to the systems biology scale is unknown. In this work, we employed a high‐resolution chemical imaging approach to map metabolic changes at the Populus trichocarpa root ...
Jayde Aufrecht, Dušan Veličković, Robert Tournay, Sneha Couvillion, Vimal Balasubramanian, Tanya Winkler, Daisy Herrera, Robert Stanley, Sharon L. Doty, Amir H. Ahkami   +9 more
wiley   +1 more source

Review paper on centroiding algorithm for lunar navigation [PDF]

This paper reviews on potential algorithms for navigation on the moon's surface, focusing on centroiding algorithms in star sensors or trackers. Accurate positioning is crucial for lunar missions since there's no Global Positioning System (GPS), and ...
Khalifa, Othman Omran, Saidin, Norazlina, Ahmad, Yasser Asrul, Razaman, Anis Hannani, Azman, Amelia Wong   +4 more
core   +1 more source

A Robust Low-Complexity Star Centroiding Algorithm for Autonomous Navigation under Lunar Noise Conditions

International Islamic University Malaysia Engineering Journal
Star-based navigation on the lunar surface is severely degraded by strong regolith reflections, abrupt illumination transitions, and sensor-induced noise, all of which lower the signal-to-noise ratio (SNR) and impair centroiding accuracy.
Anisa Hannani Razaman, Yasser Asrul Ahmad, Teddy Surya Gunawan, Othman Omran Khalifa, Mila Popović   +4 more
doaj   +1 more source

Oil‐Coated Nanoplastics Induce Rapid Membrane Disruption and Severe Intestinal Injury

Advanced Science, Volume 13, Issue 31, 4 June 2026.
Oil‐rich food contact dramatically amplifies MNP release from plastic takeout containers, producing oil‐coated nanoplastics with altered surface properties and rapid membrane‐disruptive effects. These particles cause severe intestinal barrier damage and immune dysfunction in mice, and risk modeling suggests that long‐term gastrointestinal burdens may ...
Ruwen Xie, Gulimire Yilihan, Qiong Chen, Dachuan Lin, Zhen Liu, Mengyi Yuan, Yujia Wang, Haoteng Xu, Weishang Zhou, Wanxin Gong, Yueer Li, Chen Peng, Tong Yang, Peng Gao, Qing Liu, Xin‐Hua Feng, Mu Xiao, Chao Jiang   +17 more
wiley   +1 more source