Results 41 to 50 of about 6,961,611 (296)

Preliminary concept of a space-based radar for detecting mm-size space debris

, 2022
Paper 691, 12 S.Presently, there exists very little knowledge about the density and distribution of space debris of the size of a few millimeters. The reason is that ground-based systems are not sensitive enough to detect such small objects.
Rosebrock, Jens, Cerutti-Maori, Delphine, Maouloud, I.O., Leushacke, Ludger, Krag, Holger   +4 more
core   +1 more source

Weak Spatial Target Extraction Based on Small-Field Optical System

Sensors, 2023
Compared to wide-field telescopes, small-field detection systems have higher spatial resolution, resulting in stronger detection capabilities and higher positioning accuracy.
Xuguang Zhang, Yunmeng Liu, Huixian Duan, E Zhang   +3 more
doaj   +1 more source

Space Debris Detection and Tracking with the Techniques of Cosmic Ray Physics [PDF]

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019), 2019
Space Debris (SD) consist of non-operational artificial objects orbiting around the Earth, which could possibly damage space vehicles, such as the International Space Station (ISS) or other manned spacecrafts. The vast majority of such objects are cm-sized, not catalogued and usually the tracking data are not precise enough.
Miyamoto H., Battisti M., Belov A., Bertaina M. E., Bisconti F., Bonino R., Blin-Bondil S., Cafagna F., Cambie G., Capel F., Casolino M., Cellino A., Churilo I., Cotto G., Djakonow A., Ebisuzaki T., Fausti F., Fenu F., Fornaro C., Franceschi A., Fuglesang C., Gardiol D., Gorodetzky P., Kajino F., Klimov P., Marcelli L., Marszal W., Mignone M., Murashov A., Napolitano T., Osteria G., Panasyuk M., Parizot E., Poroshin A., Picozza P., Piotrowski L. W., Plebaniak Z., Prevot G., Przybylak M., Reali E., Ricci M., Sakaki N., Shinozaki K., Suino G., Szabelski J., Takizawa Y., Traiche M., Turriziani S.   +47 more
openaire   +3 more sources

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Autonomy for Active Space Debris Removal: Research Issues and Approaches [PDF]

, 2013
Even though the infinite vastness of the universe is an accepted theory, apparently infinity ends when it comes to orbits surrounding the Earth. This was a hard lesson to learn when Iridium 33 and Cosmos 2251 collided in the low Earth orbit in February ...
Förstner, Roger, Peters, Susanne, Fiedler, Hauke   +2 more
core  

Extracellular vesicle lipidomics liquid biopsy reveals systemic and tumor microenvironment metabolic reprogramming in ovarian cancer

Molecular Oncology, EarlyView.
Extracellular vesicle (EV) lipidomic profiling of plasma and ascites from patients with high‐grade serous ovarian cancer and of ovarian cancer cell lines reveals enrichment of triglycerides (TGs), diacylglycerols (DGs), phosphatidylcholine (PCs), sphingomyelins (SMs), reflecting tumor metabolic reprogramming.
Shikha Rani, Dominic Guanzon, Andrew Lai, Katherin Scholz‐Romero, Sarah Reed, Edita Ritmejeryte, Rohan Lourie, Naven Chetty, Kaltin Ferguson, Carlos Salomon   +9 more
wiley   +1 more source

Mechanics of Space Debris Removal: A Review

Aerospace
The growing population of space debris poses a critical risk to space operations, requiring urgent removal strategies. Numerous scientific investigations have focused on debris capture mechanisms in Earth’s orbits, including contact and contact-less ...
Mohammad Bigdeli, Rajat Srivastava, Michele Scaraggi   +2 more
doaj   +1 more source

KDAC6 alters cell morphology and motility through positive and negative modulation of F‐actin distribution

FEBS Open Bio, EarlyView.
KDAC6 has been associated with cell motility and actin structures, but specific domain contributions are not established. The two catalytic domains have differential effects on motility and F‐actin regulation, affecting cortical F‐actin density, motility, stress fibers, and cell spreading.
Taylor V. Joseph, Andrea B. Pham, Kiara E. Bornes, Razan H. Hammad, Chelsea A. Rousseve‐Ross, Thomas M. Huckaba, Terry J. Watt, Tasha B. Toro   +7 more
wiley   +1 more source

Enhanced YOLOv8-based method for space debris detection using cross-scale feature fusion

Discover Applied Sciences
Optical observations play a crucial role in monitoring space debris, and long exposure large field-of-view telescopes exhibit robust detection capabilities for identifying space debris.
Yang Guo, Xianlong Yin, Yao Xiao, Zhengxu Zhao, Xu Yang, Chenggang Dai   +5 more
doaj   +1 more source

Infrared-visible space debris perception and detection with light-boosting convolution and cross-modal attention fusion

Frontiers in Astronomy and Space Sciences
IntroductionSpace debris poses an increasing threat to the safety of spacecraft because reliable perception under complex illumination remains challenging for autonomous on-orbit operations.
Yongqing Yang, Yongqing Yang, Dalei Yao, Fan Bu, Yan Wen, Rongli Chen   +5 more
doaj   +1 more source