Co-presence of PtNi nanowires and ionic liquid in carbon mesopores enhances electrocatalytic oxygen reduction activity.

The electrocatalytic activity of PtNi nanowires is enhanced by the co-presence of ionic liquid in carbon mesopores. Three-dimensional transmission electron microscopy tomography and surface-enhanced infrared absorption spectroscopy confirm the co-presence of PtNi nanowires and ionic liquid inside carbon mesopores even under electrochemical conditions.

An In Silico Model for Predicting the Efficacy of Edge-to-Edge Repair for Mitral Regurgitation.

In recent years, transcatheter edge-to-edge repair (TEER) has been widely adopted as an effective treatment for mitral regurgitation (MR). The aim of this study is to develop a personalized in silico model to predict the effect of edge-to-edge repair in advance to the procedure for each individual patient. For this purpose, we propose a combination of a valve deformation model for computing the mitral valve (MV) orifice area (MVOA) and a lumped parameter model for the hemodynamics, specifically mitral regurgitation volume (RVol).

A North-South Problem in Civic-Tech and Volunteered Geographic Information as Countermeasures of COVID-19: A Brief Overview.

The aim of this paper is to archive the situation we are witnessing regarding the application of geographic information by civic tech and volunteers, who spontaneously organised themselves to fight this newly emerging disease. Moreover, the regional bias and clarify the existence of a kind of North-South problem in the characteristics of the mapping process is aimed to be pointed out. Specific keywords were searcher after which research was performed using citations and keywords in the papers.

Divergence of Viscosity in Jammed Granular Materials: A Theoretical Approach.

A theory for jammed granular materials is developed with the aid of a nonequilibrium steady-state distribution function. The approximate nonequilibrium steady-state distribution function is explicitly given in the weak dissipation regime by means of the relaxation time. The theory quantitatively agrees with the results of the molecular dynamics simulation on the critical behavior of the viscosity below the jamming point without introducing any fitting parameter.

dc electric field effect on the anomalous exponent of the hopping conduction in the one-dimensional disorder model.

The dc electric field effect on the anomalous exponent of the hopping conduction in the disorder model is investigated. First, we explain the model and derive an analytical expression of the effective waiting time for the general case. We show that the exponent depends on the external field.

Nonequilibrium mode-coupling theory for uniformly sheared underdamped systems.

Nonequilibrium mode-coupling theory (MCT) for uniformly sheared underdamped systems is developed, starting from the microscopic thermostated Sllod equation and the corresponding Liouville equation. Special attention is paid to the translational invariance in the sheared frame, which requires an appropriate definition of the transient time correlators. The derived MCT equation satisfies the alignment of the wave vectors and is manifestly translationally invariant.