Passive testing has proved to be a powerful technique for protocol system fault detection by observing its input/output behaviors yet without interrupting its normal operations. To improve the fault detection capabilities we propose a backward checking method that analyzes in a backward fashion the input/output trace from passive testing and its past. It effectively checks both the control and ...

Passive sonar sensors are the main source of information for a submerged submarine. Modern sonar systems like ISUS 90 offer a number of acoustic antennas and combined signal processing for broadband and narrowband detection and analysis of target noise. While broadband detection is often used to obtain an overview of the targets surrounding the own ship, narrowband processing enables the detect...

Currently, with the popularity of sophisticated image editing tools like Photoshop, it is becoming very difficult to discriminate between an authentic image and its manipulated version, which poses a serious social problem of debasing the credibility of photographic images as definite records of events. Passive image forgery detection technology, as one main branch of image forensics, has been ...

Passive radar systems exploit non-cooperative transmitter to detect targets in areas of interest. Some of the main advantages of such systems with respect to conventional radars include low cost architectures, low energy requirements and potentially null probability of intercept. Digital waveforms like DVB-T and UMTS signals offer relatively wide bandwidth channels which allow achieving good sp...

The present study aimed to investigate neurophysiological substrates of phoneme and word processing in 10 patients with acute aphasia (PWA). More specifically, phoneme discrimination was studied in a passive and active oddball task with respect to different phonemic contrasts, while lexical detection was investigated by presenting infrequent pseudowords among frequent words in a passive oddball...

To preventively detect hidden terminals in a node’s vicinity, two detection mechanisms, referred to as passive detection and active detection, are proposed and compared in this poster. Simulations based on IEEE 802.11-based ad hoc networks are carried out to evaluate the proposed schemes.