Results 71 to 80 of about 11,617 (142)

Advanced General Aviation Turbine Engine (GATE) concepts [PDF]

Concepts are discussed that project turbine engine cost savings through use of geometrically constrained components designed for low rotational speeds and low stress to permit manufacturing economies.
Lays, E. J., Murray, G. L.
core   +1 more source

Minority carrier diffusion lengths and mobilities in low-doped n-InGaAs for focal plane array applications

, 2017
The hole diffusion length in n-InGaAs is extracted for two samples of different doping concentrations using a set of long and thin diffused junction diodes separated by various distances on the order of the diffusion length. The methodology is described,
Denhoff, Mike W., Walker, Alexandre W.
core   +1 more source

Assessment of acoustic and mechanical properties in modified rubberized concrete

Case Studies in Construction Materials
Utilizing waste crumb rubber and substituting cement in concrete with industrial waste materials, such as ground granulated blast furnace slag (GBFS), represents a promising pathway towards achieving sustainable development.
Hassan Amer Algaifi, Agusril Syamsir, Shahrizan Baharom, Fahed Alrshoudi, Adeb Qaid, Abdo Mohammed Al-Fakih, Akram M. Mhaya, Husam A. Salah   +7 more
doaj   +1 more source

Acoustical characteristic of empty fruit bunch (EFB) fibre with influence of sodium hydroxide treatment time and decay lifespan [PDF]

, 2019
Research on natural fibres has gain much interest in recent years due to the sustaibability and avaibility in which demand for green renewable reinforced composites. Natural fibres can be considered as the alternative way to replace the synthetic fibre
Mat Wan, Lauren
core   +1 more source

Application of an adaptive blade control algorithm to a gust alleviation system [PDF]

The feasibility of an adaptive control system designed to alleviate helicopter gust induced vibration was analytically investigated for an articulated rotor system. This control system is based on discrete optimal control theory, and is composed of a set
Saito, S.
core   +1 more source

Investigating the Sound Absorption Performance of Circular and Slotted Perforated Birch (Betula platyphylla) Plywood as Interior Building Materials

BioResources
The use of perforated plywood as an interior architectural sound-absorbing material has been increasing in popularity in Korea. This study investigated the sound absorption performance of marketed birch (Betula platyphylla) plywood with circular and ...
Eun-Suk Jang, Seok-Un Jo, Chun-Won Kang, Hee-Jun Park   +3 more
doaj   +2 more sources

3D Cementitious composites printing with pretreated recycled crumb rubber: mechanical and acoustic insulation properties

Virtual and Physical Prototyping
Cementitious materials incorporating recycled crumb rubber have become a common sustainable resolution in diverse building environments to achieve various functions in terms of lightweight, ductility, as well as energy absorption. This study explored the
Xiangyu Wang, Liangfen Du, Zhenbang Liu, Mingyang Li, Yiwei Weng, Zhixin Liu, Yi Wei Daniel Tay, Zheng Fan, Teck Neng Wong, Ming Jen Tan   +9 more
doaj   +1 more source

Damping and acoustic properties of nanosilica filled poly(styrene-acrylate) interpenetrating polymer networks (IPNs): Effect of nanocomposite preparation method

Polymer Testing
Research on noise pollution reduction has focused on utilizing damping coatings and polymer nanocomposites to enhance sound absorption. Nanosilica/poly(styrene-acrylate) nanocomposites as a water-based coating were prepared through in-situ emulsion ...
Maryam Hosseinianpour, Zahra Maghsoud, Parisa Fatemi Khadar   +2 more
doaj   +1 more source

The prediction of the diffuse field sound absorption of perforated panel systems [PDF]

This paper studies the diffuse field sound absorption coefficient of a system consisting of a rigid perforated panel with a thin porous woven/matted material glued to its back, which is placed in front of an air cavity with a rigid backing.
Davy, J, Larner, D
core  

Hybrid natural fiber composites based on cashew apple bagasse and mahogany fruit for multifunctional performance

Journal of Materials Research and Technology
This study investigates the mechanical and acoustic properties of hybrid composites developed from Cashew Apple Bagasse (CAB) fibers and a Mahogany Tree Fruit Filler (MFF) reinforced with an epoxy matrix.
Nashmi H. Alrasheedi, P. Manoj Kumar, D. Balaji, M. Sathishkumar   +3 more
doaj   +1 more source