Results 91 to 100 of about 20,159 (298)

Importance of structural hinderance in performance–stability equilibrium of organic photovoltaics

Nature Communications, 2022
The intrinsic trade-off between efficiency and stability is a challenging issue for organic photovoltaics. Here, the authors develop non-fullerene acceptors with tailored side-group hindrance and backbone planarity and realise efficiency of 18.3% and ...
Baobing Fan, Wei Gao, Xuanhao Wu, Xinxin Xia, Yue Wu, Francis R. Lin, Qunping Fan, Xinhui Lu, Wen Jung Li, Wei Ma, Alex K.-Y. Jen   +10 more
doaj   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +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 spherical fuzzy planar graph approach to optimize wire configuration in transformers

Frontiers in Physics
In this modern era, graph theory has become an integral part of science and technology. It has enormous applications in handling various design-based problems.
Hao Guan, Hao Guan, Saira Hameed, Sadaf, Aysha Khan, Jana Shafi   +5 more
doaj   +1 more source

The Prohibitive Link between Position-based Routing and Planarity

EAI Endorsed Transactions on Mobile Communications and Applications, 2013
Position-based routing is touted as an ideal routing strategy for resource-constrained wireless networks. One persistent barrier to adoption is due to its recovery phase, where messages are forwarded according to leftor right-hand rule (LHR).
David Cairns, Marwan Fayed, Hussein T. Mouftah   +2 more
doaj   +1 more source

Stacked planar optics: an application of the planar microlens

Applied Optics, 1982
In this paper we present a new development of the distributed-index planar microlens of 2.5-3-mm focal length and 0.15 N.A. and also show that it is usable with optical components in fiber communications. We then propose a concept of stacked planar optics consisting of a stack of arrayed planar microlenses and other optical components.
K, Iga, M, Oikawa, S, Misawa, J, Banno, Y, Kokubun   +4 more
openaire   +2 more sources

Car cabin personal audio: acoustic contrast with limited sound differences

, 2014
The generation of independent or personal listening zones is of significant interest in the car cabin environment. As such there are a number of methods of optimizing loudspeaker arrays to achieve personal audio reproduction.
Yanagidate, Naomichi, Elliott, Stephen, Toi, Takeshi   +2 more
core  

Level-Planarity: Transitivity vs. Even Crossings

, 2022
The strong Hanani-Tutte theorem states that a graph is planar if and only if it can be drawn such that any two edges that do not share an end cross an even number of times. Fulek et al.
Brückner, Guido, Stumpf, Peter, Rutter, Ignaz   +2 more
core   +2 more sources

Tailoring Functional Properties of Ti–Ni–Cu Shape Memory Alloy Thin Films for MEMS Actuators

Advanced Engineering Materials, EarlyView.
A comprehensive study of critical parameters required to develop well‐performing Ti–Ni–Cu thin film shape memory alloy microactuators is provided. Materials science and device integration aspects are integrated by addressing structural and physical relationships using complementary characterization techniques as well as a practical fabrication solution
Elaheh Akbarnejad, Aleksander Kostka, Gowtham Arivanandhan, Yujiao Li, Alan Savan, Manfred Kohl, Alfred Ludwig   +6 more
wiley   +1 more source