Abstract—A novel compact open-ended L-shaped slot antenna with asymmetrical rectangular patch is demonstrated and designed for UWB applications. With the open-ended L-shaped slot and an asymmetrical rectangular patch fed by the micro-strip line, multiple resonant frequencies are excited and merged to form a measured widen operating bandwidth of 3.01 ∼ 11.30GHz with 10 dB return loss. The fracti...

Linear eigenvalue analysis of cracked cylindrical shells under combined internal pressure and axial compression is carried out to study the effect of crack type, size and orientation on the buckling behavior of cylindrical thin shells. Two types of crack are considered; through crack and thumbnail crack. Our calculations indicate that depending on the crack type, length, orientation and the int...

Video files are very complex objects. For many years, researchers developed models to allow for search-and-retrieval systems specific for these objects. Since the results of a query will be a set of videos or of segments of videos, their size may be prohibitive, and do not allow for pre-validation before downloading. Moreover, many features of the video files for example the multiplicity of the...

In a recent experiment, Kaugars (1989) developed a document visualization system that displayed the results of a keyword text search as a set of small graphical representations (thumbnails) of the top 20 retrieved documents laid out in one window and a single document viewer in a second window (See Figure 1). Document thumbnails presented color-coded highlighting indicating positions and identi...

With the rapid increase of mobile devices and online media, more people prefer posting/viewing videos online. Generally, these are presented on video streaming sites with image thumbnails text titles. While facing huge amounts videos, a viewer clicks through certain high probability because its eye-catching thumbnail. However, current created manually, which is time-consuming quality-unguarante...

In this paper, we propose a reversible data hiding method in the spatial domain for compressed grayscale images. The proposed method embeds secret bits into a compressed thumbnail of the original image by using a novel interpolation method and the Neighbour Mean Interpolation (NMI) technique as scaling up to the original image occurs. Experimental results presented in this paper show that the p...