Objective : An attempt was made to compare the detection of cervical abnormalities between the use of a cotton swab and a Cervex brush in mass cancer screening. Study Design : Of 15,664 women who participated in a cervical cancer screening program in 2002, 8,366 women underwent Cervex brush sampling and 7,298 underwent cotton swab screening to compare the detectability of dysplasia and cancer i...

1. The detectability of sinusoidal gratings comprised of either one or many cycles was measured in veiling luminances the spatial frequencies of which were either narrow- or broad-band.2. In narrow-band noise, the single-cycle grating was detected with approximately 0.6 log units less contrast than the many-cycle grating. On the other hand when both broad-band and narrow-band noise were present...

In this work, we investigate the ability of genetic programming techniques to evolve valid network patterns, while avoiding detectability by obfuscating the intent of the traffic. In order to validate our system’s capabilities, we choose to evolve a port scan attack while running the packets through an Intrusion Detection System (IDS). In turn, the evolutionary process uses feedback such that i...

The detectability of a tone added to a masker is superior when the detection trial is preceded by the masker than the signal-plus-masker. This auditory enhancement can withstand long temporal gaps between the precursor and the trial, suggesting that for yes/no trials sensitivity may depend on the stimulus presented in the prior trial. The results from an experiment examining the detectability o...

Based on local optimality, a novel sequential detection scheme is proposed in this paper. The performance of the proposed scheme is compared with that of the sequential probability ratio test (SPRT) and truncated SPRT (TSPRT). The proposed scheme is shown to have higher efficiency, lower complexity, and smaller computational requirements than the SPRT at the cost of partially lower detectabilit...

At the subjective threshold, repeated flash test stimuli are perceived by the observer on only 50% of occasions, since the detectability of a single light stimulus fluctuates with time. For the analysis of these fluctuations we have recorded sequences of positive ("seen") and negative ("not seen") responses, stimulating at 10 sec intervals for 50 min. These records, reflecting the time course o...

We introduce polynomial stabilizability and detectability of well-posed systems in the sense that a feedback produces a polynomial stable C0–semigroup. Using these concepts, the polynomial stability of the given C0–semigroup governing the state equation can be characterized via polynomial bounds on the transfer function. We further give sufficient conditions for polynomial stabilizability and d...

This work explores Lyapunov characterizations of the input-output-to-state stability (IOSS) property for nonlinear systems. The notion of IOSS is a natural generalization of the standard zero-detectability property used in the linear case. The main contribution of this work is to establish a complete equivalence between the IOSS property and the existence of a certain type of smooth Lyapunov fu...

This paper analyzes the e ect of input pro le selection on software testing using the concept of fault detectability pro le. It shows that optimality of the input prole during testing depends on factors such as the planned testing e ort and the error detectability pro le. To achieve ultra-reliable software, selecting test input uniformly among di erent input domains is preferred. On the other h...

The extent of picture degradation of speckle, in particular in synthetic aperture radar pictures, has been investigated in the cases where an observer has to detect (a) a small feature immersed in a darker background, and (b) a square wave grating. In each case, a theoretical model is developed for the observer's detection mechanism, and the probability of correct decision is related to relevan...