Today, pervasive systems have become an inseparable part of computer science and engineering. These systems provide automated connection with remote access and seamless transmission of biological and other data upon request. ...

Traditionally, object retrieval methods require a set of images of a specific object for training. In this paper, we propose a new object retrieval method using a single query image, without training, for a global object. ...

Cooperative Spectrum Sensing (CSS) is an effective approach to improve the detection performance of vacant frequency bands in Cognitive Radio (CR) networks. The CSS process imposes some security threats to the CR networks. ...