We deal here with three metastable systems: 1° – the dowser texture, 2° supertwisted cholesterics and 3° hypotwisted cholesterics. outline remarkable properties of tropisms texture stemming from its low symmetry, we show that, using setups called Dowsons Colliders, nematic monopoles can be nucleated, set into motion brought collisions in texture. Subsequently, point out that nucleation dislocat...

China is rapidly urbanizing and will inevitably face trade-offs between promoting economic growth through further urbanization and protecting fertile farmland against accelerated urban expansion. This paper presents how this dilemma is being addressed in one of the most rapidly urbanizing regions in China, the Pearl River Delta (PRD), by means of assessing urban growth and farmland dynamic, as ...

The usual way of doing message passing is to have relatively intelligent processes, objects or actors sending and receiving dumb messages. Swarm communication presents the inverted approach of thinking to messages as relatively smart beings, visiting relatively non intelligent places, to produce better code and a new path for integrating complex applications. Swarm communication can be used as ...

BACKGROUND Falls occur not only in the forward direction, but also to the side and backward. The purpose of this study was to develop a portable and valid tool to measure limits of stability in the anterior-posterior and medial-lateral directions. METHODS Two hundred fifty-four community-dwelling older persons were administered the Berg Balance Test (BBT), the Timed Up & Go Test (TUG), and th...

Urban sprawl is one of the main problems that threaten the limited highly fertile land in the Nile Delta of Egypt. In this research, satellite images Landsat TM 1993, ETM+ 2001 and Egypt Sat-1, 2009 has been used to study the urban sprawl and its impact on agricultural land in Qalubiya Governorate. Maximum likelihood supervised classification and post-classification change detection techniques ...