Most of the natural textures are non-homogenous and stochastic by nature. In many cases these textures are also directional. In this paper we present a method for the retrieval of the non-homogenous directional textures. This method is directional histogram and it represents the directional distribution of the texture. The histogram can be formed using either directional filtering method or Hou...

In this paper, we present a reliable and accurate low computational complexity classifier for a fence intrusion detection sensor. The sensor, a standalone perimeter security sensor, classifies six different types of intrusion attempts on chain-link fences. The designed classifier, a dynamic sequence analyzer followed by a static classifier, obtains more than 95 percent accuracy in intrusion cla...

Under constant light illumination, cortical neuronal activity slightly modulates intensity of the light reflected from cortical surface. Optical imaging of the reflected light from the cortex has now become a popular method to obtain cortical functional maps. Since the modulation signal is small, this method is very sensitive to other sources of the light intensity changes. A well-known artifac...

Several authors have successfully created and employed vintage cohorts and housing typologies in research addressing energy renovation needs in the existing dwelling stock. This paper suggests that the idea of types would be useful in creating living quality related renovation and adaptation concepts for homes as well. Such concepts could be used for increasing accessibility and individuality o...

BACKGROUND A large percentage of autogenous and homogenous grafts are resorbed and replaced by the recipient's own tissue. It is generally believed that autogenous grafts are superior to homogenous ones. The aim of our study was to compare the effectiveness of autografts and allografts in achieving the healing of a non-union of forearm bones. MATERIAL AND METHODS Between 1976 and 2005, 56 pat...

In order to expand the area of use of the beam tracing method, the beam tracing with the refraction method (BTR) was developed. The BTR is best suited for acoustic and hydro-acoustic simulation of non-homogenous environments. The BTR can trace the refraction as well as the reflection of the sound wave, using triangular beams. The geometry of the scene in the BTR is based on triangle meshes rath...

This paper deals with state estimation of micro tunable capacitor subjected to nonlinear electrostatic force. For this end a nonlinear observer has been designed for state estimation of the structure.  Necessary and sufficient conditions for construction of the observer are presented. Stability of the observer is checked using Lyapunov theorem. Observer design is based on converting of differen...