Correction to: Impact of leg bending in the patient-specific computational fluid dynamics of popliteal stenting

Acta Mechanica Sinica - A Correction to this paper has been published: https://doi.org/10.1007/s10409-021-01066-2     

The influence of mechanical constraint upon the switching of a ferroelectric memory capacitor

The role of mechanical constraint upon the switching response of a ferroelectric thin film memory capacitor is explored. The memory capacitor is represented by a two dimensional ferroelectric island whose non-linear behaviour is modelled by a crystal plasticity constitutive law within the finite element method. The switching response of the device, in terms of remnant charge storage, is determined as a function of geometry and constraint. Various types of constraint on the ferroelectric capacitor are considered, including the presence of a silicon dioxide passivation layer, a silicon substrate and metallic electrodes. The effect of the relative resistance to 90 degree switching and 180 degree switching is also explored in a tetragonal ferroelectric device. Throughout the study, the finite element calculations are compared with the behaviour of a material element subjected to various degrees of mechanical constraint.     

Effect of geometry upon the performance of a thin film ferroelectric capacitor

The finite element method is used to investigate the performance of a ferroelectric random access memory as a function of its geometry. Performance is characterised by the charge versus electric field relation, and the sensitivity of performance to geometry is explored. The primary geometric variables are the dimensions of a prismatic two-dimensional (2D) island of ferroelectric material, and the edge inclination angle caused by the etching process along the sides of the island. The performance of the two-dimensional ferroelectric device is compared to those of an unsupported ferroelectric thin film and of a ferroelectric film bonded to a substrate.     

Impact of leg bending in the patient-specific computational fluid dynamics of popliteal stenting

Acta Mechanica Sinica - Endovascular treatment of the femoro-popliteal artery has recently become a valuable therapeutic option for popliteal arterial aneurysms. However, its efficacy remains...     

Modifications of Norditerpenoid Alkaloids:Ⅲ. Preparation of 7 ,17-seco Yunnaconitine Derivatives via Rearrangement of Chloroamine

Inourinvestigationofmoditicationofthenorditerpenoidalkaloids.cleavageoftheC(17)-C(7)bondsisthekeyreaction.Ref.[I]gaveasystematicsunlnling-upaboutthecleavages.illcludingpyrolysisof,opoxides=.pc'rolysis-reduction;,photolysis-reduction;.rearrangement-reduction',oxidation-reduction3'6alldneighboringgroupparticipation'.11ox'rever.mostofthemledtothecomplicatedproducts'.withlowyieldsordifficultpuritlcation.Inthispaper.wereportindetailsonthecleavageoftheC(l7)-C(7)bondsintheaconitine-typenorditerpeno…     

Applications of Thermal Analysis on the Marine Phytoplankton,Tetraselmis Suecica

Marine microalgae represent an essential link in the planktonic food web and some of them are commonly utilised in aquaculture systems as food for larval and juvenile stages of fishes, crustacea and mollusca. However, the caloric content and the biochemical composition of these microrganisms vary in relation to ageing and to several environmental conditions; so if the parameters under which phytoplankton grow are not suitable, marine microalgae can supply small quantities of energy and essential nutrients. The aim of this work was to study the effects of temperature on the marine planktonic alga Tetraselmis suecica using thermogravimetry (TG) and differential thermal analysis(DTA). Marked differences have been observed between exponentially, stationary and senescence phases probably due to both the presence of different biomolecules produced during algal growth and to the differences in the thermal properties of these intracellular molecules. This revised version was published online in July 2006 with corrections to the Cover Date.