Results 81 to 90 of about 1,618,021 (303)

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

open access: yesAdvanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner   +4 more
wiley   +1 more source

Aerodynamics of a Wing with a Wingtip Flapper

open access: yesFluids, 2018
In the present study, an oscillating membrane flapper was pivotally attached to the tip of a conventional rigid wing. Stroke-averaged aerodynamic forces were measured for the range of the flapping frequency, showing significant increases in the lift ...
Longfei Zhao   +2 more
doaj   +1 more source

Wing Tracheation in Chrysopidae and Other Neuropterida (Insecta): A Resolution of the Confusion about Vein Fusion

open access: yesAmerican Museum Novitates, 2017
The wings of insects are one of their most prominent features and embody numerous characters and modifications congruent with the variety of their lifestyles.
Laura C. V. Breitkreuz   +2 more
semanticscholar   +1 more source

Block Copolymers: Emerging Building Blocks for Additive Manufacturing

open access: yesAdvanced Functional Materials, EarlyView.
This review addresses how block copolymer (BCP) physics and rheology have led to the widespread use of BCPs in advanced additive manufacturing techniques, with particular emphasis on the untapped potential of these nanostructured materials toward achieving multi‐scale architected materials with unique, programmable material properties.
Alice S. Fergerson   +3 more
wiley   +1 more source

Numerical investigation of the operating conditions affecting nitrogen condensation on a three-dimensional wing in the cryogenic wind tunnel

open access: yesEngineering Applications of Computational Fluid Mechanics
Cryogenic wind tunnels (CWT) perform high Reynolds number aerodynamic tests in a cryogenic environment and simulate hypersonic flights. However, condensation under cryogenic conditions presents a major challenge to test’s reliability.
Jiaxin Hou   +3 more
doaj   +1 more source

Description Of An Anaplastic Rhabdomyosarcoma In A Cockatiel (Nymphicus Hollandicus)

open access: yesActa Veterinaria, 2015
Rhabdomyosarcoma is a malignant tumor of the skeletal muscles that is occasionally observed in free-living and pet birds. A case of malignant rhabdomyosarcoma in the musculature of the right wing of a captive female cockatiel (Nymphicus hollandicus) was ...
Ciprian Ober   +7 more
doaj   +1 more source

Analysis of Mach number 0.8 turboprop slipstream wing/nacelle interactions [PDF]

open access: yes
Data from wind tunnel tests of a powered propeller and nacelle mounted on a supercritical wing are analyzed. Installation of the nacelle significantly affected the wing flow and the flow on the upper surface of the wing is separated near the leading edge
Dahlin, J. A.   +2 more
core   +1 more source

COLIBRI: A hovering flapping twin-wing robot

open access: yes, 2017
This paper describes the results of a six-year project aiming at designing and constructing a flapping twin-wing robot of the size of hummingbird (Colibri in French) capable of hovering.
A. Roshanbin   +3 more
semanticscholar   +1 more source

Structural Porosity and Low Mineral Density in Enamel Rods Drive Molar Incisor Hypomineralisation

open access: yesAdvanced Functional Materials, EarlyView.
This study uses advanced imaging modalities on multiple length scales to show that molar‐incisor hypomineralization does not present as a locally homogeneous pathology. Instead, microstructural defects, characterized through non‐mineralized, protein‐rich sheaths and an altered mineral structure in between prism rods, resulting in local differences in ...
Katharina Jähn‐Rickert   +14 more
wiley   +1 more source

GAYA ANGKAT DAN GAYA HAMBAT SAYAP PUNA MODEL NACA 0015 MENGGUNAKAN SIMULASI ANSYS FLUENT

open access: yesRekayasa Mesin
The hi-speed computational using simulation software has emerged for the calculation of force dynamic. Albeit the significant progress in the computational method, the aerodynamic of flying wing are somewhat elusive.
Muhammad Dzulfikar   +3 more
doaj   +1 more source

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