Understanding fluid dynamics under extreme confinement, where device and intrinsic fluid length scales become comparable, is essential to successfully develop the coming generations of fluidic devices. Here we report measurements of advancing fluid fronts in such a regime, which we dub superconfinement. We find that the strong coupling between contact-line friction and geometric confinement giv...

Spindle length varies dramatically across species and during early development to segregate chromosomes optimally. Both intrinsic factors, such as regulatory molecules, and extrinsic factors, such as cytoplasmic volume, determine spindle length scaling. However, the properties that govern spindle shape and whether these features can be modulated remain unknown. Here, we analyzed quantitatively ...

This paper shows how ‘‘integral action’’ may be implemented intrinsically in the general setting of fullyactuated mechanical systems on Lie groups. When combined with an intrinsic formulation of PD control, integral action ensures that a suitably defined configuration tracking error will converge to zero in response to constant velocity commands and disturbance forces. Convergence is locally ex...

Shift spaces with the specification property are intrinsically ergodic, i.e. they have a unique measure of maximal entropy. This can fail for shifts with the weaker almost specification property. We define a new property called one-sided almost specification, which lies in between specification and almost specification, and prove that it guarantees intrinsic ergodicity if the corresponding mist...

A major problem in exoskeleton design is the unnatural movement that comes from a poor human machine interface. Innovative controller designs are a primary focus in making the interface between man and machine more fluid and intuitive. One controls approach is to detect the user’s intent to move and then command the exoskeleton’s actuators to act appropriately. These types of controllers rely o...

In this paper, we propose a functional approach to overcome the lack of expressiveness of predicative approaches for extensional reference resolution. This later approach indeed forces designers of dialogue systems to use specific heuristics when solving some reference cases, which they can’t integrate in a unified representation framework. As we focus on extensional reference resolution in a g...

Based on first-principles calculations, the relationship between molecular packing and charge-transport parameters has been investigated and analysed in detail. It is found that the crystal packing forces in the flexible organic molecule 4-(1,2,2-triphenylvinyl)-aniline salicylaldehyde hydrazone (A) can apparently overcome the dynamic intramolecular rotations and the intramolecular steric repul...

The three-dimensional intrinsic convection in a monodisperse dispersion of spheres settling in a vertical container of arbitrary cross section is calculated using the simple model of point forces with excluded volume near the walls, proposed by Bruneau et al. @Phys. Fluids 8, 2236 ~1996!#. An exact solution of the model equations for a container with rectangular cross-section shows that corners...

In single-molecule force spectroscopy, individual molecules and complexes are often stretched by pulling devices via intervening molecular handles. Accurate interpretation of measurements from such experiments in terms of the underlying energy landscape, defined by activation barriers and intrinsic rates of transition, relies on our understanding, and proper theoretical treatment, of the effect...

The paper investigates the dynamic relationship between social trust and economic governance and provides a possible explanation for their long-term trends and crosssectional variation. To mitigate the inherent moral hazard problem in a principal— agent situation, both intrinsic trustworthiness and extrinsic incentives are useful. The distribution of intrinsic trustworthiness among agents chara...