Results 61 to 70 of about 5,327 (264)

The importanse of dialectic and formal logics in the process of diagnostics

RUDN Journal of Medicine, 2008
The points of dialectic and formal logic are in a complex ratio in dialectic process. The doctor during the diagnosing uses basically principles of formal logic. Logic mistakes of diagnostics in clinic of internal illnesses are connected in many respects
I Ja Sultanov
doaj  

Non-bifurcation behavior of laminated composite plates under in-plane compression [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences
The paper deals with bifurcation and/or non-bifurcation post-buckling curves of composite plates under biaxial compression. For different lay-up sequences, a coupling, i.e. extension-bending (EB) is considered. The current investigations present distinct
Mehdi Bohlooly Fotovat, Tomasz Kubiak
doaj   +1 more source

Microstructure Evolution of a VMnFeCoNi High‐Entropy Alloy After Synthesis, Swaging, and Annealing

Advanced Engineering Materials, EarlyView.
The synthesis and processing (rotary swaging and annealing) of the novel VMnFeCoNi alloy is investigated, alongside the estimation of the grain size effect on hardness. Analysis of a wide grain size range of recrystallized microstructures (12–210 µm) reveals a low annealing twin density.
Aditya Srinivasan Tirunilai, Zeki Ayrildi, Buse Şen, Maik Rajkowski, Mathias Redondo Garcia, Markus Stricker, Guillaume Laplanche   +6 more
wiley   +1 more source

A novel sustainable cellulosic fibrous blended yarns as an alternative to cotton for textile applications

Journal of Engineered Fibers and Fabrics
Cotton’s environmental impact due to high water, fertilizer, and pesticide use is a concern despite the rising demand for natural fibers; however, significant research on different natural fiber blends is lacking.
Mariam Jabbar, Fatima Iftikhar, Tanveer Hussain, Faheem Ahmad, Sheraz Ahmad   +4 more
doaj   +1 more source

Performance Analysis and Optimization of DCT-Based Multicarrier System on Frequency-Selective Fading Channels

IEEE Access, 2018
Regarded as one of the most promising transmission techniques for future wireless communications, the discrete cosine transform (DCT)-based multicarrier modulation (MCM) system employs cosine basis as orthogonal functions for real-modulated symbols ...
Chang He, Lei Zhang, Juquan Mao, Aijun Cao, Pei Xiao, Muhammad Ali Imran   +5 more
doaj   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Influence of Surface Finish on the Tribological Performance of AlTiBN Coatings Deposited on Forming Tools

Advanced Engineering Materials, EarlyView.
Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver, Iker Alfonso, Eneko Barba, Javier León, José Antonio García, Iñaki Zalakain, Iván Fernández Martínez, Arley García‐Carrero, Christian Almeyda, Daniel Salcedo   +9 more
wiley   +1 more source

Numerical Simulation of Buckling and Post-Buckling Behavior of a Central Notched Thin Aluminum Foil with Nonlinearity in Consideration

Metals, 2020
In thin notched sheets under tensile loading, wrinkling appears on the sheet surface, specifically around the cracked area. This is due to local buckling and compression stresses near the crack surfaces.
Mahdieh Shahmardani, Per Ståhle, Md Shafiqul Islam, Sharon Kao-Walter   +3 more
doaj   +1 more source

Low Cycle Repetitive Loading of Ti‐6Al‐4V‐Epoxy Composite Lattice Structures for Enhanced Energy Dissipation and Damage Tolerance

Advanced Engineering Materials, EarlyView.
Composite Ti–6Al–4V–epoxy lattice structures are additively manufactured and epoxy infiltrated for cyclic loading. At low lattice volume fractions, hybridization produces synergistic gains in stiffness and energy dissipation. At higher volume fractions, synergy diminishes, although composites still exceed metallic lattices in specific energy ...
Joey Tallon, Jordan Noronha, Justin Dirrenberger, Andrey Molotnikov   +3 more
wiley   +1 more source