Liquid-crystal blue phases (BPs) are highly ordered at two levels. Molecules exhibit orientational order at nanometer length scales, while chirality leads to ordered arrays of double-twisted cylinders over micrometer scales. Past studies of polycrystalline BPs were challenged by the existence of grain boundaries between randomly oriented crystalline nanodomains. Here, the nucleation of BPs is c...

The Northern Cross radiotelescope in Medicina is being used by the Basic Element for SKA Training project (BEST, Montebugnoli et al. 2006) as test bed for technological developments aimed at the Square Kilometer Array (SKA),within the SKA-Design Studies (SKA-DS) programme. In the framework of these activities, 6 of the 24 East-West arm sections of the original telescope will be refurbished, alo...

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] The seeds of many aquatic plants are buoyant and thus transported at the water surface, where they are subject ...

carbon nanotube, a new structure of carbon element, is composed of graphene sheets rolled into closed concentric cylinders with diameter of the order of nanometers and length of micrometers. liquid arc discharge was used for fabrication of carbon nanotubes, and subsequently a modified acid treatment method applied for purification stage. a statistical design of experimental (doe) (taguchi metho...

The risks of ferromagnetic compressed gas cylinders becoming projectiles in an MR environment are well known (12). The recent death of a child from such an incident reinforces the potential for disaster (3).

A new four elements compact antenna array is presented and discussed to achieve enhanced phase resolution without sacrificing the array output power. This structure inspired by the Ormia Ochracea’s coupled ears. The analogy between this insect acute directional hearing capabilities and the electrically compact antenna array is used to enhance the array sensitivity to direction of arrival estima...