Results 101 to 110 of about 60,070 (312)

Non-Keplerian orbits using hybrid solar sail propulsion for Earth applications [PDF]

open access: yes, 2012
Half a century of space technology development has provided a wealth of new space applications. However, many still remain to be explored. Examples include increased geostationary coverage and new opportunities to enhance polar observation.
Biggs, James   +3 more
core  

Transfer Printing and Reconfiguration of Soft Electronics Using Digital Microfluidics and Laser Machining

open access: yesAdvanced Functional Materials, EarlyView.
This paper presents a digital microfluidics‐based technique for transferring and reconfiguring soft nanomembranes. Laser‐machined nanothin membranes are picked up, transported, and aligned via tailored surface tension and the actuation of water droplets, enabling the development of flexible electronics, the integration of functional materials on 3D ...
Quang Anh Nguyen   +15 more
wiley   +1 more source

Propulsion Rig: A multirotor performance measurement test platform [PDF]

open access: yesMATEC Web of Conferences
Off-the-shelf multirotor propulsion system components can produce uncertain static and dynamic performance. Commercially, solutions exist to characterise the inexact performance of the propulsion system, yet they are prohibitively expensive. To that end,
Hasewinkel Guy, Pretorius Arnold
doaj   +1 more source

A novel approach to hybrid propulsion transfers [PDF]

open access: yes, 2011
This paper introduces a hybrid propulsion transfer termed a Hohmann Spiral, incorporating low and high-thrust technologies, analogous to the high-thrust bi-elliptic transfer.
Macdonald, Malcolm, Owens, Steven Robert
core  

Near‐Infrared Light‐Driven Zn/Au Janus Micromotors for Multiplex SERS Detection of Anticancer Drugs

open access: yesAdvanced Functional Materials, EarlyView.
Zn/Au Janus micromotors, propelled by thermophoretic effects under NIR light, function as active SERS platforms for single and multiplex detection of anticancer drugs. Their dynamic motion enhances analyte exchange at the Au interface, reducing saturation and competitive adsorption, thereby improving sensitivity and extending the linear detection range.
Tijana Maric   +8 more
wiley   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

open access: yesAdvanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang   +14 more
wiley   +1 more source

Chiral Phase Change Nanomaterials

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow   +11 more
wiley   +1 more source

STATIC STIFFNESS MODELING AND SENSITIVITY ANALYSIS OF SHIELD PROPULSION SYSTEM BASED ON VIRTUAL DISPLACEMENT PRINCIPLE

open access: yesJixie qiangdu, 2023
Propulsion system is an important part of shield machine, and its stiffness will affect the propelling and steering function. In order to obtain the effective parameterized stiffness model of shield propulsion system, and to accurately describe the ...
XU YouNan, SHI ZiQuan, HE Liu, CHU Hang
doaj  

Digital simulation of gas turbine steady-state and transient performance for current and advanced marine propulsion systems [PDF]

open access: yes, 2009
The research study focuses on the idea of simulation of an Integrated Full Electric Propulsion System. The simulation required the development of a gas turbine performance model that could predict the dynamic behaviour of the engine in response to a ...
Mody, Bhavik
core  

Phase Evolution Kinetics in Additive‐Free 19.75% Organic Photovoltaics Empowered by Solvent Vapor Annealing

open access: yesAdvanced Functional Materials, EarlyView.
Solvent vapor annealing enables kinetic control of additive‐free morphology in organic solar cells. Selective plasticization of acceptor forms an optimal fibrillar network, boosting efficiency to 19.06% (binary) and 19.75% (ternary), with ultrafast exciton dissociation and reduced recombination.
Jie Lv   +20 more
wiley   +1 more source

Home - About - Disclaimer - Privacy