Results 21 to 30 of about 981,951 (245)

Analysis of localized oxides and oxide films formed on alloy 625 and 617 in supercritical water and superheated steam environments at 750°C

open access: yesMechanical Engineering Journal, 2017
Oxidation tests using coupon specimens of alloy 625 and alloy 617, and four-point bending tests for a duration of 100 hrs were carried out in supercritical water (SCW) environment at a pressure of 24 MPa and in superheated steam (SHS) environments at 750°
Tatsuya ISHIKAWA   +4 more
doaj   +1 more source

Mechanical and thermal expansion properties of aligned carbon nanotube reinforced epoxy composites

open access: yesMechanical Engineering Journal, 2019
Aligned MWCNT/epoxy composites made with the three types of the multi-walled carbon nanotubes (MWCNTs) with different thermal annealing temperature have been prepared, and the tensile tests and thermal expansion tests of the composites in the MWCNT ...
Keiichi SHIRASU   +3 more
doaj   +1 more source

A novel n-type semiconducting biomaterial

open access: yesScientific Reports, 2022
There has been no research conducted thus far on the semiconducting behaviour of biomaterials. In this study, we present an n-type semiconducting biomaterial composed of amorphous kenaf cellulose fibre (AKCF) paper with a voltage-controlled N-type ...
Mikio Fukuhara   +6 more
doaj   +1 more source

Development of Highly Sensitive Strain Sensor Using Area-Arrayed Graphene Nanoribbons

open access: yesNanomaterials, 2021
In this study, a basic design of area-arrayed graphene nanoribbon (GNR) strain sensors was proposed to realize the next generation of strain sensors. To fabricate the area-arrayed GNRs, a top-down approach was employed, in which GNRs were cut out from a ...
Ken Suzuki   +3 more
doaj   +1 more source

Validation of orthopaedic surgeons’ assessment of cognitive function in patients with acute hip fracture

open access: yesBMC Musculoskeletal Disorders, 2019
Background About one fourth of patients with hip fracture have cognitive impairment. These patients are at higher risk of surgical and medical complications and are often excluded from participating in clinical research.
Målfrid Holen Kristoffersen   +7 more
doaj   +1 more source

The effect of aquatic exercise on bone mineral density in older adults. A systematic review and meta-analysis

open access: yesFrontiers in Physiology, 2023
Introduction: Aquatic or water-based exercise is a very popular type of exercise in particular for people with physical limitations, joint problems and fear of falling.
Eileen Schinzel   +26 more
doaj   +1 more source

Reverse Ballistic Impact Studies of Thin Plate Perforation

open access: yesEngineering Transactions, 2014
Full-scale ballistic experiments using tungsten rods and rolled homogeneous armour (RHA) steel plates are expensive to perform. For this reason, a study has been performed into the possibility of using less expensive, more easily available metals in ...
L. C. FORDE   +4 more
doaj   +1 more source

Impact and indenting damage of CVD-produced ZnS and ZnSe ceramics

open access: yesMaterials Research Express, 2020
Time series of acoustic emission pulses were excited in ductile ZnS and ZnSe ceramics either by a falling weight or by indenting the Vickers pyramid. Energy distributions in emitted acoustical emission pulses were found to be random (Poisson-like) in the
Alexandre Chmel   +3 more
doaj   +1 more source

Influence of Loading Rate on the Hydrogen-Assisted Micro-Damage in Bluntly Notched Samples of Pearlitic Steel

open access: yesMetals, 2016
The influence of loading rate (crosshead speed) on the fracture process of bluntly notched samples of pearlitic steel under hydrogen environment is analyzed in this paper.
Jesús Toribio   +2 more
doaj   +1 more source

Stress Intensity Factor Solutions for Eccentric Annular External Cracks in Notched Round Bars under Tensile Loading

open access: yesMetals, 2023
In this paper, stress intensity factor (SIF) solutions of eccentric annular external cracks in elliptical notched round bars under tension loading have been obtained from 3D finite element analysis, along with their relation to the energy release rate ...
Jesús Toribio   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy