Results 91 to 100 of about 5,412 (286)

Notes on logarithmic spiral trajectories generated by solar sails [PDF]

, 2017
The aim of this paper is to provide a systematic study about the possibility of inserting a solar sail spacecraft into a heliocentric logarithmic spiral trajectory. The required conditions in terms of solar sail (fixed) attitude, performance, and initial
BASSETTO, MARCO, QUARTA, ALESSANDRO ANTONIO, MENGALI, GIOVANNI, NICCOLAI, LORENZO   +3 more
core  

De Novo Design of Membrane‐Targeting Antimicrobial Peptides Against Gram‐Negative Bacteria Using a Generative Artificial Intelligence Framework

Advanced Science, EarlyView.
Antimicrobial resistance caused by Gram‐negative bacteria remains difficult to overcome due to the protective outer membrane. To address this challenge, a multi‐condition constrained generative AI framework, GenMTAMP is proposed for de novo membrane‐targeting antimicrobial peptide design by integrating physicochemical and spatial structure descriptors.
Jingxiao Yu, Da‐Wen Sun, QingYi Wei, Yibing Zhang, Jidong Tang, Hongbin Pu   +5 more
wiley   +1 more source

Numerical investigation of coarse granular flow of the Coandă effect-based collector over logarithmic spiral surface for deepsea mining

Applied Ocean Research
As an emerging hydraulic harvester for deep-ocean polymetallic nodules, Coandă effect-based collectors aim to minimize seabed disturbance while maintaining high collector efficiency.
Hao Jia, Ya-peng Wang, Jian Yang
doaj   +1 more source

Stability of generalized Newton difference equations

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012
In the paper we discuss a stability in the sense of the generalized Hyers-Ulam-Rassias for functional equations Δn(p, c)φ(x) = h(x), which is called generalized Newton difference equations, and give a sufficient condition of the generalized Hyers-Ulam ...
Wang Zhihua, Shi Yong-Guo
doaj   +1 more source

Improved bandwidth low-profile miniaturized multi-arm logarithmic spiral antenna

, 2014
NoA low-profile (λ/43) miniaturized multi-element antenna is presented, which displays vertical polarization with an omni-directional radiation pattern.
S. Marker, Jones, Steven M.R., T. Van Buren, Suggett, T., Van Buren, T., R. A. Abd-Alhameed, J. M. Noras, T. Suggett, Marker, S., Zhu, Shaozhen (Sharon), Abd-Alhameed, Raed, T. S. Ghazaany, S. Zhu, Noras, James M., Ghazaany, Tahereh S., S. M. R. Jones   +15 more
core   +1 more source

Conformational Snapshots of CydDC in a Native Lipid Bilayer Coupling Heme Transport to Antibiotic Resistance

Advanced Science, EarlyView.
Phylogenetic and biochemical analyses of the heme transporter CydDC reveal its functional conservation throughout bacterial evolution and demonstrate its unique asymmetric allosteric mechanism. Furthermore, impairment of CydDC function directly affects bacterial antibiotic resistance and likely compromises antibiotic efficacy through drug efflux.
Lili Yang, Changbin Zhang, Mengyuan Lyu, Yongbo Luo, Jierou Zhang, Yujiao Chen, Lintao Luo, Wen Qiao, Xiangyangpeng Li, Yu Zhou, Zhongling Wei, Yuling Xiao, Qian Niu, Juan Zhou, Guanglin He, Binwu Ying, Zhaoming Su, Hao Chen, Xiaodi Tang, Haohao Dong   +19 more
wiley   +1 more source

Remarkable curves as images of circles and lines under conformal maps

Дифференциальная геометрия многообразий фигур, 2018
We consider images of a family of circles under some conformal maps. It is shown that the images of these lines are remarkable curves, such as cardioid, lemniscate of Bernoulli, logarithmic spiral.
A. Kochina
doaj  

Flexible Dual-Band Ultrathin Frequency Selective Surface With Polarization Independence, Angular Stability, and Bending Insensitivity

IEEE Access
This paper introduces a novel ultrathin frequency selective surface (FSS) based on interconnected logarithmic spiral geometries. The structure is fabricated on a flexible polyimide substrate with a thickness of 0.05 mm, a relative permittivity of 4.3 ...
Maciel Alves de Oliveira, Ruann Victor de Andrade Lira, Alfredo Gomes Neto, Juliete da Silva Souza, Antonio Luiz Pereira de Siqueira Campos, Alexandre Jean Rene Serres   +5 more
doaj   +1 more source

DESIGN AND OPTIMISATION OF TEETH FOR THE 5TD-1200 SOYBEAN THRESHER [PDF]

Engenharia Agrícola
Drum speed is a key parameter controlling threshing intensity: excessively high speeds cause a high proportion of broken grains (due to uneven impact), while excessively low speeds leave more unthreshed grains.
Yujiao Teng, Mengran Cui, Shunchang Guo, Bendi Qi, Xin Feng   +4 more
doaj   +1 more source

Targeting a Myeloid–Regulatory B Cell Network Reverses Immune Paralysis in Periprosthetic Joint Infections

Advanced Science, EarlyView.
Periprosthetic joint infection establishes a sophisticated immunosuppressive network between CXCR4+ PMN‐MDSCs and Bregs, inducing profound CD8+ T cell paralysis. Alendronate effectively disrupts this CXCR4+ PMN‐MDSC–Breg axis by targeting STAT3, thereby restoring local immune surveillance.
Jintao Wu, Shutao Zhang, Yumin Lin, Juyang Jiao, Zhiwei Fu, Qimin Hong, Ziyi Zhao, Xinhua Qu, Fei Su, Bing Yue   +9 more
wiley   +1 more source