Results 21 to 30 of about 14,655,308 (282)

Comparative study on the evolution of fracture structure of bituminous coal based on different pyrolysis methods

open access: yesMeitan xuebao, 2023
Underground in-situ pyrolysis of coal is a new trend in the utilization of coal resources in the future. It is especially critical to investigate the coal pore-fissure structure, its spatial distribution and connectivity under different pyrolysis methods,
Jianhang SHI   +4 more
doaj   +1 more source

Comparison of the Mechanical Properties of Four-layer Epoxy Composite Reinforced with Natural Jute Fibers and Symmetrical E-glass Synthetic Fibers [PDF]

open access: yes, 2020
Research that produces environmentally friendly products continues to be developing. Research related to the natural fiber jute material and epoxy matrix has done.
Abdullah, H. A. (Hanif)   +5 more
core  

Ultrafine-Grained Stainless Steels after Severe Plastic Deformation

open access: yesMetals, 2023
The aim of the present review is to summarize the recent achievements in the development of ultrafine-grained austenitic/ferritic stainless steels processed by large strain deformation.
Pavel Dolzhenko   +4 more
doaj   +1 more source

Optical properties of lowest-energy carbon allotropes from the first-principles calculations [PDF]

open access: yes, 2017
We study the optical properties of lowest-energy carbon allotropes in the infrared, visible and ultra-violet ranges of light in the general gradient approximation of the density functional theory.
Saleev, Vladimir, Shipilova, Alexandra
core   +2 more sources

Influence of the Heating Rate on the Foaming Behavior of Various Aluminium Alloys

open access: yesMetals, 2017
Powders of metallurgically prepared precursors expand to a foam differently depending on how fast they are heated to their foaming temperature. The foaming behavior of four alloys was studied with heating rates varying from 0.1 K/s to 18 K/s.
Tillmann R. Neu   +3 more
doaj   +1 more source

Properties of bio-based gum Arabic/clay aerogels [PDF]

open access: yes, 2016
Lightweight bio-based aerogels from sustainable gum Arabic (GA) and sodium montmorillonite (Na+-MMT) clay were prepared by means of a simple freeze-drying process. GA/clay aerogels showed high porosity (87.9%–94.9%) of mainly open type and the mechanical
Abt, Tobias Martin   +2 more
core   +2 more sources

Dynamically Recrystallized Microstructures, Textures, and Tensile Properties of a Hot Worked High-Mn Steel

open access: yesMetals, 2019
The deformation microstructures and mechanical properties were studied in a high-Mn steel subjected to hot compression. The deformation microstructures resulted from the development of dynamic recrystallization (DRX).
Pavel Dolzhenko   +3 more
doaj   +1 more source

Soil Chemical Properties Under Conservation Agriculture and Cereal-Based Cropping System in Eastern Tarai of Nepal [PDF]

open access: yes, 2020
Field experiments were conducted for four years (2014-2017) at five locations namely Salbani, Bhokraha, Simariya, Bhaluwa and Kaptanganj of Sunsari district to assess the changes in soil chemical properties under conservation agriculture (CA)-based ...
Gyawaly, P. (Pankaj)   +5 more
core  

Mixing properties and statistical limit theorems for singular hyperbolic flows without a smooth stable foliation [PDF]

open access: yes, 2019
Over the last 10 years or so, advanced statistical properties, including exponential decay of correlations, have been established for certain classes of singular hyperbolic flows in three dimensions.
Araujo, Vitor, Melbourne, Ian
core   +2 more sources

Fungal Degradation of Extractives Plays an Important Role in the Brown Rot Decay of Scots Pine Heartwood

open access: yesFrontiers in Plant Science, 2022
Scots pine heartwood is known to have resistance to wood decay due to the presence of extractives, namely stilbenes and resin acids. However, previous studies have indicated that these extractives are degradable by wood decaying fungi.
Tiina Belt   +3 more
doaj   +1 more source

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