Results 31 to 40 of about 18,950 (295)

Multiparameter Collaborative Optimization and Analysis of the Non-Penetrating Tunnel Thruster

Journal of Marine Science and Engineering
A brand new non-penetrating tunnel thruster (short for NPT thruster) is proposed in this paper. The tunnel structural parameters of the thruster are optimized, and the performance and optimization effect are verified by experiments. First, the design and
Jinyu Guo, Yi Yang, Chao Wang, Zhiqiang Hu, Quan Zheng, Chuanzhi Fan   +5 more
doaj   +1 more source

Emission Modes in Electrospray Thrusters Operating with High Conductivity Ionic Liquids

Aerospace, 2020
Electrospray thruster life and mission performance are strongly influenced by grid impingement, the extent of which can be correlated with emission modes that occur at steady-state extraction voltages, and thruster command transients.
Nolan M. Uchizono, Adam L. Collins, Anirudh Thuppul, Peter L. Wright, Daniel Q. Eckhardt, John Ziemer, Richard E. Wirz   +6 more
doaj   +1 more source

A Parallelized Genetic Algorithm to Evaluate Asteroid Impact Missions Using Electric Propulsion

Aerospace, 2022
A streamlined genetic algorithm was developed and implemented on a GPU to evaluate low-thrust trajectories of spacecraft propelled by an ion thruster. It was then applied to examine the utility of a specific thruster for an asteroid impact mission.
Kamesh Sankaran, Scott A. Griffith, Noah C. Thompson, Matthew D. Lochridge, Andrew S. O’Kins   +4 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Modelling stem cell differentiation related processes—A practical overview for biologists

FEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar, Xinqi Yan, Lucas F. Jansen Klomp, Stefano Schivo, Janine N. Post   +4 more
wiley   +1 more source

Computational Analysis of the Performance of a Peripheral Thruster in Terms of Thrust Reduction and Unsteady Propeller Blade Loads at Non-zero Ship Speeds

Polish Maritime Research
The analysis presented in this article focuses on two aspects of the performance of a peripheral thruster, namely the reduction in thrust and increase in unsteady propeller blade loads with increasing ship speed. The peripheral thruster is an alternative
Kraskowski Marek, Dymarski Paweł, Dymarski Czesław, Hebel Włodzimierz, Łuniewski Paweł   +4 more
doaj   +1 more source

Development of a Laser Micro-Thruster and On-Orbit Testing

Aerospace, 2023
Laser micro-thrust technology is a type of propulsion that uses a laser beam to ablate a propellant such as a metal or plastic. The ablated material is expelled out the back of the spacecraft, generating thrust.
Jifei Ye, Sibo Wang, Hao Chang, Yanji Hong, Nanlei Li, Weijing Zhou, Baoyu Xing, Bangdeng Du, Chengyin Xie   +8 more
doaj   +1 more source

Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry

FEBS Letters, EarlyView.
EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri, Ayaka Nagasato‐Ichikawa, Keita Iida, Shuhei Kimura, Akira Imamoto, Mariko Okada   +5 more
wiley   +1 more source

A dual Stage ion engine for high impulse missions

, 2012
In this paper, the applicability of dual stage ion optics and in particular of the so-called dual stage ion engine to high power, high specific impulse missions will be evaluated. First, the performance limits of conventional two gridded ion engines (GIE)
Coletti, M., Gabriel, S.B.
core   +1 more source

Simulating a Cyber-Attack on the Mass Thruster Controllers at Low-Speed Motion

Promet (Zagreb)
The aim of this paper is to highlight the vulnerability of Maritime Autonomous Surface Ships (MASS) to cyber-attack and to illustrate, through a simulation experiment on a testbed, how to mitigate a cyber-attack on the MASS thruster controllers during ...
Igor ASTROV, Sanja BAUK
doaj   +1 more source