In this paper, we present a wearable smart system to help visually impaired persons (VIPs) walk by themselves through the streets, navigate in public places, and seek assistance.The main components of the system are a microcontroller board, various sensors, cellular communication and GPS modules, and a solar panel.The system employs a set of sensor

We consider situations where rays Cart - Jinker are reflected according to geometrical optics by a set of unknown obstacles.The aim is to recover information about the obstacles from the travelling-time data of the reflected rays using geometrical methods and observations of singularities.Suppose that, for a disjoint union of finitely many strictly

Nowadays the demand for receiving the high quality electrical energy is being increasing as consumer wants not only reliable but also quality power.The usage of automated equipment are increasing and far more susceptible to disturbances compare to the previous generation equipment and information systems.With the deregulation of the electric power

The African malaria mosquito, Anopheles gambiae sensu stricto (A.gambiae), provides a unique opportunity to study the evolution of reproductive isolation because it is divided into two sympatric, partially isolated subtaxa known as M form and S form.With the annotated genome of this species now available, high-throughput techniques can be applied t