Results 61 to 70 of about 10,063,597 (281)

Solar sail cooperative formation flying around L2-type artificial equilibrium points

, 2020
The aim of this paper is to propose a distributed control architecture for a solar sail-based formation, flying around an L 2 -type artificial equilibrium point in the Sun-[Earth + Moon] circular restricted three-body problem.
Wei Wang, H. Baoyin, G. Mengali, A. Quarta   +3 more
semanticscholar   +1 more source

On Formation Deployment for Spinning Tethered Formation Flying

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2005
The concern with a spinning tethered formation flying system has been recently growing because it can keep the formation precisely enough for synthetic aperture radar and interferometry applications. The system also attracts attention because it is expected to be able to deploy and maintain membrane structures to realize a solar sail spacecraft.
Nakaya, Koji, Matunaga, Saburo
openaire   +2 more sources

Comparing the paths of Hedgehog release in artificial and natural settings

FEBS Letters, EarlyView.
Hh morphogens require solubilization factors to overcome their tight association with the plasma membrane and signal to distant cells, but the precise functions of these factors are controversial. Here, we use published in vivo observations as the most relevant evidence to test their suggested functions and discuss contradictions and gaps between in ...
Janna Puschmann, Kay Grobe
wiley   +1 more source

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

Histamine formation in flying fish contaminated with Staphylococcus xylosus

International Aquatic Research, 2016
Histamine is the main causative agent of scombroid poisoning. However, unlike scombroid fish, histamine poisoning due to consumption of flying fish has never been reported.
Hsien-Feng Kung, Yi-Chen Lee, Ya-Ling Huang, Chun-Yung Huang, Chiu-Chu Hwang, Yung-Hsiang Tsai   +5 more
doaj   +1 more source

Optimal cooperative control for formation flying spacecraft with collision avoidance

Science Progress, 2020
This article investigates optimal cooperative control algorithms for spacecraft formation flying system that can guarantee collision avoidance between spacecrafts. By selecting potential functions to avoid collisions and constructing index cost functions
Xiaohan Lin, Xiaoping Shi, Shilun Li
doaj   +1 more source

Sliding Mode Control with Sliding Perturbation Observer-Based Strategy for Reducing Scratch Formation in Hot Rolling Process

Applied Sciences, 2021
In a hot rolling process, excessive friction between rollers and steel plates may lead to the formation of scratches on the steel plate. To reduce scratch formation in the finishing mill of the hot rolling process, two techniques are proposed in this ...
Hyun-Hee Kim, Sung-Jin Kim, Sung-Min Yoon, Yong-Joon Choi, Min-Cheol Lee   +4 more
doaj   +1 more source

Stimulator of interferon genes agonist augmented antitumor immunity of osimertinib in Egfr‐mutated lung cancer

Molecular Oncology, EarlyView.
Combining osimertinib with the STING agonist ADU‐S100 activates innate and adaptive immunity to overcome the non‐inflamed microenvironment of Egfr‐mutant lung cancer. This combination increases NK and CD8+ T‐cell infiltration, associated with activation of the STING‐IRF3 pathway and local immunogenic cell death.
Jun Nishimura, Tadahiro Kuribayashi, Johannes Brägelmann, Sachi Okawa, Masataka Taoka, Shunta Mori, Tomoka Nishimura, Takaaki Tanaka, Go Makimoto, Kiichiro Ninomiya, Kammei Rai, Eiki Ichihara, Ryohei Katayama, Katsuyuki Hotta, Masahiro Tabata, Yosuke Togashi, Yoshinobu Maeda, Martin L. Sos, Katsuyuki Kiura, Kadoaki Ohashi   +19 more
wiley   +1 more source

Study on maintaining formations during satellite formation flying based on SDRE and LQR

Open Physics, 2017
Due to the influence of various perturbations of space, satellites flying in formation cannot maintain specific configurations for long durations [1, 2]. In order to ensure that formation configurations are able to meet the requirements of space missions,
Ke Zhang, Zhenqi He, Meibo Lv
doaj   +1 more source

Collision Avoidance Algorithm for Satellite Formation Reconfiguration under the Linearized Central Gravitational Fields [PDF]

Journal of Astronomy and Space Sciences, 2013
A collision-free formation reconfiguration trajectory subject to the linearized Hill’s dynamics of relative motion is analytically developed by extending an algorithm for gravity-free space.
InYoung Hwang, Sang-Young Park, Chandeok Park   +2 more
doaj   +1 more source