Results 31 to 40 of about 9,704 (210)

Spin-Orbit Dirac Fermions in 2D Systems [PDF]

, 2017
We propose a novel model for including spin-orbit interactions in buckled two dimensional systems. Our results show that in such systems, intrinsic spin-orbit coupling leads to a formation of Dirac cones, similar to Rashba model.
Campbell, David K., Carvalho, Alexandra, Hanakata, Paul Z., Neto, Antonio H. Castro, Park, Harold S., Rodin, Aleksandr S.   +5 more
core   +1 more source

Analysis of the Bearing Capacity of Concrete-Filled Thin-Walled Square Steel Tubes with Helical Stiffening Based on Local Buckling

Buildings
To address the issue of local buckling in thin-walled steel tube concrete columns, a form of helical stiffening ribs was proposed. Axial compression tests were conducted on five sections of square steel tube concrete column specimens.
Penggang Tian, Zhenshan Wang, Kai Wang, Jianhui Niu, Zhixun Xie, Kangning Liu   +5 more
doaj   +1 more source

Compressive forces causing rod buckling in sucker rod pumps and using sinker bars to prevent buckling [PDF]

, 2016
Sucker rod pumps has been the most commonly used pumps in the petroleum industry. Therefore, many studies associated with sucker rods focuses on maximizing the rod life.
Eritici, Cagdas
core   +1 more source

A Closed-Form Buckling Formula for Open-Coiled and Properly Supported Circular-Bar Helical Springs

Journal of Mechanical Engineering, 2018
As a continuation of the author’s previous studies on the buckling analysis of helical springs, a closed-form formula having been obtained with the help of the artificial neural network (ANN) is proposed and discussed in detail for the first time for a ...
Vebil Yildirim
doaj   +1 more source

Cardiac looping may be driven by compressive loads resulting from unequal growth of the heart and pericardial cavity. Observations on a physical simulation model

Frontiers in Physiology, 2014
The transformation of the straight embryonic heart tube into a helically wound loop is named cardiac looping. Such looping is regarded as an essential process in cardiac morphogenesis since it brings the building blocks of the developing heart into an ...
Jörg eMänner, Meric eBayraktar
doaj   +1 more source

Failure Processes in Embedded Monolayer Graphene under Axial Compression [PDF]

, 2016
Exfoliated monolayer graphene flakes were embedded in a polymer matrix and loaded under axial compression. By monitoring the shifts of the 2D Raman phonons of rectangular flakes of various sizes under load, the critical strain to failure was determined ...
Androulidakis, Charalampos, Frank, Otakar, Galiotis, Costas, Koukaras, Emmanuel N., Novoselov, Kostya S., Papagelis, Konstantinos, Parthenios, John, Pugno, Nicola, Sfyris, Dimitris, Tsoukleri, Georgia   +9 more
core   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Study on helical post-buckling of motional coiled tubing in horizontal wells

Journal of Petroleum Exploration and Production Technology
Coiled tubing is widely used in oil and gas operations. However, the long coiled tubing may undergo sinusoidal or helical buckling deformations, and even lock-up, leading to property damage and serious accidents.
Zhuang Li, Liangyu Chen, Fei Yuan, Lei Zhao   +3 more
doaj   +1 more source

Discrete elastic model for stretching-induced flagellar polymorphs

, 2008
Force-induced reversible transformations between coiled and normal polymorphs of bacterial flagella have been observed in recent optical-tweezer experiment.
Asakura S., H. Wada, Love A. E. H., R. R. Netz, Wada H., Wada H. Netz R. R., Zhao J. M. Kim M. Scherer N. F. Cluzel P.   +6 more
core   +1 more source

Adaptive 4D‐Printed Vascular Stents With Low‐Temperature‐Activated and Intelligent Deployment

Advanced Functional Materials, EarlyView.
Microarchitected coronary artery stents were fabricated using a polycaprolactone (PCL)‐based shape memory polymer (SMP) composite via projection micro‐stereolithography (PµSL) 4D printing. By incorporating diethyl phthalate (DEP) as a plasticizer, the thermal transition temperature (Ttran) was modulated to about 37°C, enabling rapid and autonomous ...
Yannan Li, Yifan Pan, Chikahiro Imashiro, Chaolun Xu, Jianxian He, Jingao Xu, Kewei Song, Ze Zhang, Chen Gao, Junbo Jiang, Runhuai Yang, Kayo Hirose, Shinjiro Umezu   +12 more
wiley   +1 more source