Results 61 to 70 of about 1,487,802 (240)

Radar tracking and motion-sensitive cameras on flowers reveal the development of pollinator multi-destination routes over large spatial scales [PDF]

, 2012
Central place foragers, such as pollinating bees, typically develop circuits (traplines) to visit multiple foraging sites in a manner that minimizes overall travel distance.
Chittka, Lars, Reynolds, Andrew M., Chittka, L, Ka S Lim, Ralph J. Stelzer, Lihoreau, M, Ralph J Stelzer, Andrew M. Reynolds, Ka S. Lim, Stelzer Ralph J., Osborne Juliet L., Ka S. Lim (137973), Alan D. Smith, Mathieu Lihoreau, Raine Nigel E., Juliet L Osborne, Chittka Lars, Nigel E. Raine¤b, Ralph J. Stelzer (137971), Osborne, Juliet L., Osborne, JL, Nigel E Raine, Reynolds, Andrew M, Mathieu Lihoreau (137965), Chittka, L., Stelzer, RJ, Lihoreau, M., Lihoreau Mathieu, Stelzer, Ralph J., Lars Chittka (27016), Raine, N. E., Smith, Allan, Reynolds Andrew M., Lim, Ka, Andrew M Reynolds, Raine, Nigel E., Smith, AD, Reynolds, A. M., Juliet L. Osborne¤c, Smith, A. D., Andrew M. Reynolds (137969), Lim, KS, Raine, Nigel, Raine, NE, Stelzer, Ralph, Alan D Smith, Smith, Alan D., Reynolds, AM, Lars Chittka, Lim Ka S., Lihoreau, Mathieu, Nigel E. Raine (75421), Stelzer, R. J., Osborne, J. L., Juliet L. Osborne (107697), Alan D. Smith (137975), Lim, K. S., Lim, Ka S., Smith Alan D., Smith, Alan, Lim, Jason, Reynolds, Andy   +61 more
core   +1 more source

EndoTac: An Endoscopic Camera‐Based Tactile Sensor with High Sensitivity for Minimally Invasive Surgery

Advanced Science, EarlyView.
EndoTac presents a trocar‐compatible endoscopic vision‐based tactile sensor that uses a convex mirror to enlarge side‐facing tactile coverage during minimally invasive vessel palpation. Distorted tactile images are unwarped and processed by a learning model to estimate vascular deformation, enabling sensitive, spatially distributed tactile perception ...
Yupeng Wang, Nicolas Raison, Xuyang Zhang, Aijia Yang, Lukas Lindenroth, Shan Luo   +5 more
wiley   +1 more source

Power Allocation Scheme for Multi-Static Radar to Stably Track Self-Defense Jammers

Remote Sensing
Due to suppression jamming by jammers, the signal-to-interference-plus-noise ratio (SINR) during tracking tasks is significantly reduced, thereby decreasing the target detection probability of radar systems.
Gangsheng Zhang, Junwei Xie, Haowei Zhang, Weike Feng, Mingjie Liu, Cong Qin   +5 more
doaj   +1 more source

A Microenvironment‐Adaptive Scaffold Rejuvenates Peripheral Nerve Regeneration During Aging Via Dual Modulation of Ferroptotic Stimuli in Schwann Cells

Advanced Science, EarlyView.
(i) Aging impairs peripheral nerve regeneration via its dual ferroptosis‐mediated pathologies in senescent schwann cells. (ii) The composite nerve conduit is a symbiosis niche integrating microenvironment‐responsive nanoparticles (Ga‐PTAs) and maxillofacial‐derived mesenchymal stem cells (Mmscs).
Ning Zhan, Lixin Tian, Lianjie Peng, Jingyu Zhang, Lining Lin, Xiaoting Zhang, Yaxian Luo, Zhichao Liu, Xinhua Yao, Mouyuan Sun, Yong He, Mengfei Yu, Huiming Wang   +12 more
wiley   +1 more source

Heteroatom‐Mediated Covalent Organic Framework Membranes With Nitrogen‐Enriched Nanochannels for Efficient Desalination

Advanced Science, EarlyView.
Heteroatom precursor engineering serves as a molecular‐level strategy to tailor hydrazide monomer reactivity and diffusion kinetics, enabling controlled assembly of highly crystalline COF membranes with ultramicroporous channels. The nitrogen‐enriched nanochannels deliver high water/ion selectivity via simultaneous water transport acceleration and ion ...
Guishan Hu, Muning Chen, Yunqiu Zhou, Yu Zhen, Miaomiao Tian, Yatao Zhang, Jingwei Hou, Junyong Zhu, Yong Wang   +8 more
wiley   +1 more source

Effect of dual aircraft formation spacing on target position tracking on measurement conversion by monopulse radar

AIP Advances, 2021
Aimed at the current problem of insufficient analysis of the influence of the diversified formation of dual aircraft on monopulse radar position tracking, the dual aircraft echo equivalent two point source jamming model is built.
Mingjie Liu, Chunyang Wang, Huiyong Zeng, Changlin Zhou   +3 more
doaj   +1 more source

RADAR CHARACTERISTICS OF PRECIPITATION AFFECTING THE TRACKING OF SHIP’S RADAR OBJECTS

Shipping & Navigation, 2022
In this paper, we consider the possibility of using the radar characteristics under precipitation conditions in order to reduce the echo signal’s negative impact on the object tracking performed by the ship’s radar. Precipitation particles’ size, state (solid or liquid phase), shape, and the factors that determine their combined action play an ...
openaire   +1 more source

A Preclinical Multifunctional Capsule Robot with Unified Diagnosis and Targeted Thermal Therapy for Gastrointestinal Diseases

Advanced Science, EarlyView.
A proof‐of‐concept multifunctional capsule robot integrates diagnostic imaging, magnetic navigation, wireless power transfer, and targeted thermotherapy for gastrointestinal applications. Magnetically guided positioning and stable wireless power enable localized thermal ablation, achieving controlled heating and high cell mortality in vitro.
Heng Zhang, Yichong Sun, Xiaoting Zhang, Chi‐Kwan Lee, Zheng Li, Yehui Li, Huarong Chen, Paul D. Mitcheson   +7 more
wiley   +1 more source

Macrophage Trogocytosis of Tumor Cells Drives the Immunosuppression of Tumor Microenvironment

Advanced Science, EarlyView.
Trogocytosis efficiency varies significantly among different tumor cells and is inversely related to their cortical stiffness; this efficiency dictates the extent of immunosuppression via upregulation of CXCL5 and Arg‐1, ultimately driving CD8+T cell exhaustion and tumor escape.
Chao Liang, Jiaqi He, Wan‐Ru Zhuang, Yao Lei, Yanru Jiang, Xianbin Ma, Pan Liu, Zhujun Jiang, Yongheng Li, Hai‐Yan Xie   +9 more
wiley   +1 more source

Target Tracking Radar

IOSR Journal of Engineering, 2014
Tracking radar systems are used to measure the target's relative position in range, azimuth angle, elevation angle, and velocity. Then, by using and keeping track of these measured parameters the radar can predict their future values. This paper proposes the measure a single target angle using sequential lobing technique.
openaire   +1 more source