OBJECTIVES Central venous catheter (CVC) placement is a common procedure in critical care management. The authors set out to determine echocardiographic features during a saline flush of any type of CVC. The hypothesis was that the presence of a rapid saline swirl in the right atrium on bedside echocardiography would confirm correct placement of the CVC tip, similar to the accuracy of the postp...

Sweet potato has been identified as a crop that has great potential for alleviating food security concerns (28). However, because it is vegetatively propagated, it is prone to accumulate viruses and other pathogens. Sweet potato viruses are difficult to transmit mechanically, they occur in mixed infections, and their host range often is restricted to the family Convolvulaceae (24). These factor...

The multiplicative model can be used to describe SAR image formation. In this context, the effect and nature of coherent speckling on the spectrum of SAR images is investigated. A method for estimate the spectrum of the backscatter image, based on estimates of the spectra of the speckled image and noise is developed. 1 Introduction Images and signals produced by coherent systems are subject to ...

This paper proposes a spatial video de-noising method based on adaptive filtering and temporal filtering as it requires less computation time and suitable for real-time applications. video de-noising rely on spatial adaptive temporal filtering is offered. Initially in the adaptive spatial filtering, DWT (discrete wavelet transfer) is applied on all frame. These co-efficient are used to alter tr...

Sweet potato virus disease (SPVD) is the most devastating disease of sweetpotato [Ipomoea batatas (L.) Lam.] globally. It is caused by the co-infection of plants with a potyvirus, sweet potato feathery mottle virus (SPFMV), and a crinivirus, sweet potato chlorotic stunt virus (SPCSV). In this study we report the use of cDNA microarrays, containing 2765 features from sweetpotato leaf and storage...

Maximum likelihood multivariate techniques are used to classify pixels from remotely sensed data into specific crop and other land cover types. This approach, although useful in estimating the acreage planted to specific crops, tends to create a visually speckled (or noise filled) image where misclassification and/or missing crop areas occur in a field. Past research into reducing this effect i...