Introduction: The different factors that affect the camera uniformity of Single Photon Emission Computed Tomography (SPECT) technique have been analyzed including peak shift (%) and window width of energy. The effect of peak shift and window width on SPECT image uniformity has been investigated using a point source to perform intrinsic flood images. Methods:</stro...

When analyzing sequencing reads, it is important to distinguish between putative correct and wrong bases. An open question is how a PHRED quality value is capable of identifying the miscalled bases and if there is a quality cutoff that allows mapping of most errors. Considering the fact that a low quality value does not necessarily indicate a miscalled position, we decided to investigate if win...

1  Abstract—Popular peer to peer streaming media systems such as PPLive and UUSee rely on periodic buffer-map exchange between peers for proper operation. The buffer-map exchange contains redundant information which causes non-negligible overhead. In this paper we present a theoretical framework to study how the overhead can be lowered. Differentiating from the traditional data compression app...

BACKGROUND Atrial tachycardias (ATs) after extensive ablation are increasingly common and challenging arrhythmias. The prolonged intra-atrial conduction time (IACT) during ATs in the milieu may complicate the mapping of focal ATs. In this present study, we aim to characterize the electrophysiological features of ATs in this unique setting and to delineate an effective mapping strategy further. ...

objective(s): the energy resolution of a cadmium-zinc-telluride (czt) solid-state semiconductor detector is about 5%, and is superior to the resolution of the conventional anger type detector which is 10%. also, the window width of the high-energy part and of the low-energy part of a photo peak window can be changed separately. in this study, we used a semiconductor detector and examined the ef...

Although continuous systems such as the Chua circuit are known with hidden attractors, attractors also exist in classical discrete maps, a generalized Hénon map. A attractor is an that does not overlap its own attracting region vicinity, which makes it difficult to visualize. In this paper, local bifurcation analysis method for maps described, and of map performed using method. The structure, p...

The quality of interferogram, which is limited by various phase noise, will greatly influence the subsequent processes interferometric synthetic aperture sonar (InSAS), such as unwrapping and digital elevation model (DEM) estimation. Therefore, filtering an essential step in signal processing for InSAS. In this paper, adaptive method combined with map proposed to suppress noise while preserving...

The article presents the memetic SOM, an evolutionary algorithm embedding self-organizing maps as operators to address the vehicle routing problem with time windows (VRPTW). We show that it allows to extend the self-organizing map to deal with a version of the vehicle routing problem with time windows where the number of vehicles is an input, and by adding some walking distance from customers t...

We propose a three step iterative and interactive visual text mining process to assist users in exploring document collections. In the proposed approach (i) topics are automatically extracted from a document collection , (ii) users explore a similarity-based document map and its related topics, while refining a topic list, and (iii) map quality itself and topic list definition can both be impro...

A novel hierarchical stereo matching algorithm is presented which gives disparity map as output from illumination variant stereo pair. Illumination difference between two stereo images can lead to undesirable output. Stereo image pair often experience illumination variations due to many factors like real and practical situation, spatially and temporally separated camera positions, environmental...