Shape Transformation of Wave Beams Falling on Quasiperiodic Media

Author(s):  
Valentine Borulko
Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 64 ◽  
Author(s):  
Qin Wang ◽  
Hui Xie ◽  
Zhiming Hu ◽  
Chao Liu

In this study, molecular dynamics simulations were carried out to study the coupling effect of electric field strength and surface wettability on the condensation process of water vapor. Our results show that an electric field can rotate water molecules upward and restrict condensation. Formed clusters are stretched to become columns above the threshold strength of the field, causing the condensation rate to drop quickly. The enhancement of surface attraction force boosts the rearrangement of water molecules adjacent to the surface and exaggerates the threshold value for shape transformation. In addition, the contact area between clusters and the surface increases with increasing amounts of surface attraction force, which raises the condensation efficiency. Thus, the condensation rate of water vapor on a surface under an electric field is determined by competition between intermolecular forces from the electric field and the surface.


Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 540
Author(s):  
Chao Fang ◽  
Jiaxing Yao ◽  
Xingyu Xia ◽  
Yuan Lin

As one of the most important cellular compartments, the nucleus contains genetic materials and separates them from the cytoplasm with the nuclear envelope (NE), a thin membrane that is susceptible to deformations caused by intracellular forces. Interestingly, accumulating evidence has also indicated that the morphology change of NE is tightly related to nuclear mechanotransduction and the pathogenesis of diseases such as cancer and Hutchinson–Gilford Progeria Syndrome. Theoretically, with the help of well-designed experiments, significant progress has been made in understanding the physical mechanisms behind nuclear shape transformation in different cellular processes as well as its biological implications. Here, we review different continuum-level (i.e., energy minimization, boundary integral and finite element-based) approaches that have been developed to predict the morphology and shape change of the cell nucleus. Essential gradients, relative advantages and limitations of each model will be discussed in detail, with the hope of sparking a greater research interest in this important topic in the future.


2010 ◽  
Vol 108 (7) ◽  
pp. 074902 ◽  
Author(s):  
Moustafa Y. Ghannam ◽  
Abdulazeez S. Alomar ◽  
Jef Poortmans ◽  
Robert P. Mertens

Author(s):  
Shuai Zhou ◽  
Jing Bai ◽  
Tiantian Li ◽  
Xiaxin Gao ◽  
Ruoyu Xu ◽  
...  

2021 ◽  
Author(s):  
Valene Wang ◽  
Jiwon Kim ◽  
Junyoung Kim ◽  
Seul Woo Lee ◽  
Kyoung Taek Kim

The shape control of nanostructures formed by the solution self-assembly of block copolymers is of significance for drug delivery. In particular, site-specific perturbation resulting in the conformational change of the...


CrystEngComm ◽  
2021 ◽  
Vol 23 (38) ◽  
pp. 6655-6660
Author(s):  
Chi Xiao ◽  
Na Tian ◽  
Wei-Ze Li ◽  
Xi-Ming Qu ◽  
Jia-Huan Du ◽  
...  

Shape transformation between high-index faceted Pt nanocrystals and low-index faceted ones have been achieved by an electrochemical square-wave potential method.


2015 ◽  
Vol 60 (4) ◽  
pp. 437-449 ◽  
Author(s):  
Sophie A. Reinhart ◽  
Thomas Schulzki ◽  
Walter H. Reinhart
Keyword(s):  

2013 ◽  
Vol 477-478 ◽  
pp. 240-245
Author(s):  
Xiaohui Guan

Bi-directional Flying Wing (BFW) is a new supersonic civil transport shape concept that aims to meet the conflict requirements of high speed cruise and low speed take-off/landing missions. In this paper the Class-Shape-Transformation (CST) shape parameterization method is modified to represent the BFW shape, and new basis functions suitable for the BFW airfoil representation are constructed. The Far-field Composite Element (FCE) wave drag optimization is performed on both the flat bottom and symmetric BFW configurations, and the drag reduction effects and result precision are surveyed. It is suggested that significant wave drag reduction can be achieved by the FCE optimization for both the flat bottom and the symmetric BFW configurations. The wave drag coefficients with sufficient precision can be obtained in the FCE optimization of the symmetric configuration; while the FCE optimization results of the flat bottom one are not accurate enough.


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