in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae, and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand, or...

How well can observers detect the presence of a change in luminance distributions? Performance was measured in three experiments. Observers viewed pairs of grayscale images on a calibrated CRT display. Each image was a checkerboard. All luminances in one image of each pair consisted of random draws from a single probability distribution. For the other image, some patch luminances consisted of r...

In this paper we present some of the basic ideas associated with the detection of abrupt changes in dynamic systems. Our presentation focuses on two classes of methods -multiple filter-based techniques and residual-based methods -and in far more detail on the multiple model and generalized likelihood ratio methods. Issues such as the effect of unknown onset time on algorithm complexity and stru...

We previously reported reductions in mammographic densities in women participating in a trial of a gonadotropin-releasing hormone agonist (GnRHA)-based regimen for breast cancer prevention. In our previous report, we compared (by simultaneous evaluation) three basic elements of mammographic densities. The purpose of the present study was to evaluate whether a standard (expert) method of measuri...

The ability to detect a dynamic change in interaural time difference (ITD) was examined for rates of change from 3.125 to 32,000 s/s, for stimulus durations from 0.025 to 16 seconds, and for extent of change in interaural delay from 50 to 800 s. The stimulus was a sinusoidal tone of frequency f Hz presented to one ear and f f to the other ear, where f , the frequency difference, was varied to s...

In this paper, an ischemia detector is presented based on the analysis of QRS-derived angles. The detector has been developed by modeling ischemic effects on the QRS angles as a gradual change with a certain transition time and assuming a Laplacian additive modeling error contaminating the angle series. Both standard and non-standard leads were used for analysis. Non-standard leads were obtaine...

We are interested in a low level part of user modeling, which is the change detection in the context of the user. We present a method to detect on line changes in the context of a user equipped with non invasive sensors. Our point is to provide, in real time, series of unlabeled contexts that can be classi ed and analyzed on a higher level.

In this paper we provide theoretical and experimental results that dimension of video trajectories is a useful tool to access mid-level content of videos, like, appearance or disappearance of an object, and changes in velocity and in direction of moving objects. Moreover, the amount of changes is proportional to the size of objects involved and their speed. All this is achieved by a robust tech...

We address in this paper the probleni of detecting changes between two photographs of the same scene taken at different dates. Considering that both images are already accurately registered our problem reduces to a) detect changes between corresponding pixels, and b) determine whellier these changes are a clue o f a major change in the scene. The solution ofa) involves the use of spectral invar...

Human walking gait is disrupted by the spinal cord injury (SCI) or amputation.1 Gait rehabilitation involves improvement of the motor control functions by the activation of neuro-plasticity. It can be achieved by deciphering and translation of brain signals that correspond to the execution, or action imagery, of the affected limb, into output commands. BCI could be used to build new communicati...