Results 91 to 100 of about 23,648 (228)

Single screw extrusion of long discontinuous fiber‐reinforced polymers: Pellet motion and heat transfer

open access: yesPolymer Composites, EarlyView.
Sequential coupling of motion and heat‐transfer of long‐discontinuous fiber reinforced pellets in a single screw extruder. Abstract Single screw extrusion is widely used in material pre‐compounding, extrusion additive manufacturing, and injection molding.
Vasudha Kapre   +2 more
wiley   +1 more source

Metallized Propellants for the Human Exploration of Mars [PDF]

open access: yes
Advanced chemical propulsion using Metallized Propellants (MP) can lead to significant reductions in launch mass for piloted Mars missions. MP allow the propellant density or the specific impulse I(sub sp) of the propulsion system, or both, to increase ...
Palaszewski, Bryan A.
core   +1 more source

Failure analysis of angle‐ply thin woven GFRP composites under low‐velocity impact and low‐temperature

open access: yesPolymer Composites, EarlyView.
Abstract A comprehensive experimental and analytical study was conducted on quasi‐isotropic woven glass fiber‐reinforced polymer composites with a stacking sequence of [0°/±45°/90°]s, under low‐velocity impact at a low temperature of −50 °C. The results were compared to those at room temperature.
U. A. Khashaba
wiley   +1 more source

Wake Geometry Effects on Rotor Blade-Vortex Interaction Noise Directivity [PDF]

open access: yes
Acoustic measurements from a model rotor wind tunnel test are presented which show that the directionality of rotor blade vortex interaction (BVI) noise is strongly dependent on the rotor advance ratio and disk attitude.
Marcolini, Michael A.   +3 more
core   +1 more source

Mechanical performance of bio‐based fiber reinforced polymer composites: A review

open access: yesPolymer Composites, EarlyView.
Applications of bio‐based fiber reinforced polymer composites in various sectors. Abstract Natural fiber‐reinforced polymeric composites (NFRCs) offer a sustainable solution at the intersection of environmental consciousness and materials engineering. These composites address plastic pollution and industrial material demands by utilizing natural fibers
Daksh Shelly   +5 more
wiley   +1 more source

Computer program for parameter optimization [PDF]

open access: yes, 1968
Flexible, large scale digital computer program was designed for the solution of a wide range of multivariable parameter optimization problems.
Glatt, C. R., Hague, D. S.
core   +1 more source

Paving the Way for Improved Representation of Coupled Physical and Biogeochemical Processes in Arctic River Plumes—A Case Study of the Mackenzie Shelf

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT Processes affecting the transformation of riverine dissolved organic carbon (DOC) across the land‐to‐ocean aquatic continuum are still poorly constrained in Arctic models, leading to large uncertainties in simulated air–sea CO2 fluxes of the coastal periphery.
Clément Bertin   +12 more
wiley   +1 more source

Fail-safe system for activity cooled supersonic and hypersonic aircraft [PDF]

open access: yes
A fail-safe-system concept was studied as an alternative to a redundant active cooling system for supersonic and hypersonic aircraft which use the heat sink of liquid-hydrogen fuel for cooling the aircraft structure.
Braswell, D. O.   +2 more
core   +1 more source

Planting and replanting: Continuity and change over four decades of forest restoration in Himachal Pradesh, India

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
India has a long history of planting trees to restore ecosystem services providing an opportunity to evaluate long‐term ecosystem restoration processes. We show that these programs have shifted over time in response to public demands as well as through changes in the government's vision for forests.
Forrest Fleischman   +5 more
wiley   +1 more source

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