Results 21 to 30 of about 138,345 (150)

The effect of nanometre-scale V-pits on electronic and optical properties and efficiency droop of GaN-based green light-emitting diodes

open access: yesScientific Reports, 2018
The development of efficient green light-emitting diodes (LEDs) is of paramount importance for the realization of colour-mixing white LEDs with a high luminous efficiency.
Shengjun Zhou   +8 more
doaj   +1 more source

Conjugate Heat Transfer Investigation on Swirl-Film Cooling at the Leading Edge of a Gas Turbine Vane

open access: yesEntropy, 2019
Numerical calculation of conjugate heat transfer was carried out to study the effect of combined film and swirl cooling at the leading edge of a gas turbine vane with a cooling chamber inside.
Haifen Du   +4 more
doaj   +1 more source

Identification Methods and Test Results for Tilting Pad and Fixed Geometry Journal Bearing Dynamic Coefficients – A Review

open access: yesShock and Vibration, 2009
Fluid film journal bearings (FFBs) are used to support high-speed rotors in turbomachinery which often operate above the rotor first bending critical speed.
T.W. Dimond   +3 more
doaj   +1 more source

Monitoring the Joint Area of Composite Membrane Materials

open access: yesApplied Sciences, 2019
Textile membranes are suitable for a wide range of applications due to their user-adjustable properties, which can be modified based on both the textile reinforcement structure and the coating material. Complex dynamic loads are involved in typical usage
Hans Winger   +5 more
doaj   +1 more source

Influence of the Size of Damage to the Steel Wire Rope on the Magnetic Signature

open access: yesSensors, 2022
This article presents diagnostic tests of wire ropes using passive magnetic methods. The study used two types of wire ropes with different constructions and diameters.
Paweł Mazurek   +2 more
doaj   +1 more source

Simulation of surface deformation control during selective laser melting of AlSi10Mg powder using an external magnetic field

open access: yesAIP Advances, 2019
Selective laser melting (SLM) produces complex physical behaviors. After laser melting, the molten pool condenses with an uneven surface, which influences the next powder spreading process and affects the quality of the final product.
Liwei Chen   +9 more
doaj   +1 more source

Enhancing the effectiveness of thermal water consumption via heat pumping

open access: yesApstract: Applied Studies in Agribusiness and Commerce, 2015
Renewable technologies and the extension of their scope of usage basically has to face the general obstacles like any other novelties newly introduced to the market.
János Nagygál   +4 more
doaj   +1 more source

Supersonically Spray-Coated Colloidal Quantum Dot Ink Solar Cells

open access: yesScientific Reports, 2017
Controlling the thickness of quantum dot (QD) films is difficult using existing film formation techniques, which employ pre-ligand-exchanged PbS QD inks, because of several issues: 1) poor colloidal stability, 2) use of high-boiling-point solvents for QD
Hyekyoung Choi   +5 more
doaj   +1 more source

Nonlinear forced vibration analysis of composite beam combined with DQFEM and IHB

open access: yesAIP Advances, 2020
In this paper, a forced vibration model of composite beams under the action of periodic excitation force considering geometric nonlinearity is proposed. For the strain–displacement relationship, Timoshenko beam theory is used, and the element and system ...
Kwangchol Ri   +4 more
doaj   +1 more source

APPLICATION OF JMODELICA.ORG TO TEACHING THE FUNDAMENTALS OF DYNAMICS OF FOUCAULT PENDULUM-LIKE GUIDED SYSTEMS TO ENGINEERING STUDENTS

open access: yesІнформаційні технології і засоби навчання, 2017
The present educational research is focused on the solution of didactic problem of an engineering-friendly description and explanation of the dynamics and control of Foucault pendulum-like systems, which have arisen from practical problems of boom crane ...
Alexander V. Perig   +4 more
doaj  

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