Electroconvection using the liquid crystal N4 is studied as a function of two control parameters: the applied frequency and the applied voltage. As a function of voltage, there is a rich series of bifurcations that takes the system from stationary rolls to chaos. As a function of the frequency, the initial pattern changes from stationary oblique rolls at low frequencies to stationary normal rolls at higher frequencies. There is also a change in the secondary bifurcations. In particular, we observe that the bimodal-varicose instability is replaced by the skewed-varicose instability as the applied frequency is increased. Comparisons with theoretical predictions are made.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.67.016207 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of different 3D-printing systems on the flexural strength of provisional fixed dental prostheses: a systematic review and network meta-analysis of in vitro studies.
BMC Oral Health
January 2025
Department of Restorative Dentistry, Recep Tayyip Erdoğan University, Rize, Turkey.
Objectives: The aim of this systematic review and network meta-analysis was to compare the flexural strength of provisional fixed dental prostheses (PFDPs) fabricated using different 3D printing technologies, including digital light processing (DLP), stereolithography (SLA), liquid crystal display (LCD), selective laser sintering (SLS), Digital Light Synthesis (DLS), and fused deposition modeling (FDM).
Materials And Methods: A comprehensive literature search was conducted in databases including PubMed, Web of Science, Scopus, and Open Grey up to September 2024. Studies evaluating the flexural strength of PFDPs fabricated by 3D printing systems were included.
Redefining the limits of actuating fibers via mesophase control: From contraction to elongation.
Sci Adv
January 2025
School of Chemical Engineering, Pusan National University, Busan, Republic of Korea.
The development of fibrous actuators with diverse actuation modes is expected to accelerate progress in active textiles, robotics, wearable electronics, and haptics. Despite the advances in responsive polymer-based actuating fibers, the available actuation modes are limited by the exclusive reliance of current technologies on thermotropic contraction along the fiber axis. To address this gap, the present study describes a reversible and spontaneous thermotropic elongation (~30%) in liquid crystal elastomer fibers produced via ultraviolet-assisted melt spinning.
View Article and Find Full Text PDFThe Unusual Mesophases and Properties Exhibited by a Family of Glycosteroids.
Chemistry
January 2025
Universite Claude Bernard Lyon 1, ICBMS, Bâtiment Lederer, 1 Rue Victor Grignard, F-69622, Villeurbanne, FRANCE.
In this article we describe research on the synthesis and characterization of a family of "Janus" amphiphiles composed of disaccharide head groups and alkaloid units joined together via a methylene linker, and bearing a lateral aliphatic chain of varying length. The condensed phases formed by self-organization of the products as a function of temperature were characterized by differential scanning calorimetry, thermal polarized light microscopy, and small angle X-ray scattering, allied with computational modelling and simulations. Structural studies on heating specimens from the solid showed that some homologues exhibited lamellar, columnar and bicontinuous mesophases, whereas the same homologues revealed different phase sequences on cooling from the amorphous liquid.
View Article and Find Full Text PDFMe2Se and Me2Te: their structures and synergistic effects of halogen/chalcogen bonding with C6F5Br and C6F5I.
Chemistry
January 2025
Universitat Bielefeld, Chemie, Universitätsstraße 15, 33615, Bielefeld, GERMANY.
This work combines halogen and chalcogen bonding. Short, polarity directed C-X⋅⋅⋅Ch (X = Br or I, Ch = Se or Te) contacts were prepared by in situ low-temperature cocrystallization of liquid mixtures of neutral pentafluorohalogenobenzenes C6F5X and dimethyl chalco-genides Me2Ch. Solid-state structures of Me2Se and Me2Te were determined 150 and 125 years after their first description.
View Article and Find Full Text PDFDrug delivery strategies for the treatment of relapse behavior in substance use disorder- A systematic review.
Metab Brain Dis
January 2025
Florey Institute of Neuroscience & Mental Health, Parkville, VIC, Australia.
Substance use disorders (SUDs) pose a significant global health challenge, with relapse being a major obstacle in achieving successful treatment outcomes. In recent years, drug delivery strategies have emerged as promising tools to improve treatment efficacy and patient compliance in the context of SUD. Here we explore a diverse range of drug delivery strategies that have been investigated for addressing relapse behavior in SUD.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!