Results 21 to 30 of about 42,876 (257)

The progress of laser ranging technology at Shanghai Astronomical Observatory

Geodesy and Geodynamics, 2019
As an important station of International Laser Ranging Service (ILRS), Shanghai Astronomical Observatory (SHAO) has upgraded Satellite Laser Ranging (SLR) system with high repetition rate and achieved some technological progress.
Zhibo Wu, Haifeng Zhang, Huarong Deng, Mingliang Long, Zhien Cheng, Zhongping Zhang, Wendong Meng   +6 more
doaj   +1 more source

SD-DETR: Space Debris Detection Transformer Based on Dynamic Convolutional Network and Cross-Scale Collaborative Attention

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
With the advancement of human exploration of near-Earth space, the number of space debris in Earth’s orbit has increased dramatically, posing serious threats to orbiting spacecraft.
Zhikang Zhang, Yang Zhang, Wei Liu, Chuankai Liu, Tingshan Liu   +4 more
doaj   +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

Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions

FEBS Letters, EarlyView.
The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang, Hyo Been Jin, Chang Min Kim, So Yeon Lee, Hyun Ho Park   +4 more
wiley   +1 more source

Identification of the plant mitochondrial OrfX protein: A mass spectrometry approach

FEBS Letters, EarlyView.
The mitochondrial genome of plants contains an open reading frame, orfx, which encodes a rare protein that has so far escaped mass spectrometric detection. The protein resembles the c‐subunit of bacterial twin‐arginine‐motif‐dependent protein translocases (TatC).
Matthias Döring, Jan de Jonge, Hans‐Peter Braun, Nils Rugen   +3 more
wiley   +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., Cambiè, 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., Marszał, W., Mignone, M., Murashov, A., Napolitano, T., Osteria, G., Panasyuk, M., Parizot, E., Poroshin, A., Picozza, P., Piotrowski, L.W., Plebaniak, Z., Prévôt, G., Przybylak, M., Reali, E., Ricci, M., Sakaki, N., Shinozaki, K., Suino, G., Szabelski, J., Takizawa, Y., Traïche, M., Turriziani, S.   +47 more
openaire   +2 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

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

Effect Analysis of Optical Masking Algorithm for GEO Space Debris Detection

International Journal of Optics, 2019
A method with high detection rate, low false-alarm rate, and low computational cost is presented for removing stars and noise and detecting space debris with signal-to-noise ratio (SNR>3) in consecutive raw frames.
Sijie Kong, Jin Zhou, Wenli Ma
doaj   +1 more source

Engineered extracellular vesicles enriched with the miR‐214/199a cluster enhance the efficacy of chemotherapy in ovarian cancer

Molecular Oncology, EarlyView.
Loss of the miR‐214/199a cluster is associated with recurrence in ovarian cancer. Engineered small extracellular vesicles (m214‐sEVs) elevate miR‐214‐3p/miR‐199a‐5p in tumor cells, suppress β‐catenin, TLR4, and YKT6 signaling, reprogram tumor‐derived sEV cargo, reduce chemoresistance and migration, and enhance carboplatin efficacy and survival in ...
Weida Wang, Ayesha Alvero, Yi Qin, Mingjin Wang, Alexandra Fox, Yanfeng Li, Michael Millman, Amy Kemper, Gil Mor, Xian Shuang Liu, Michael Chopp, Zheng Gang Zhang, Yi Zhang   +12 more
wiley   +1 more source