This paper presents a practical supervised band selection procedure for airborne imaging spectrometers and Maximum Likelihood classification (MLC) as data application. The output band set is optimal in band location, width and number regarding the MLC accuracy of the classification task. The supervised algorithm is based on feature selection and requires a user-defined class set. For two given ...

The aim of this study is to translate and validate the instrument Requirement for Directed Attention (RDA), developed by Guirardello, into Brazilian culture. The instrument, comprised of 39 items, addresses situations in the work environment of critical care and medical-surgical units that demand the nurse's direct attention. The methodological approach consists of the following steps: (a) tran...

Many algorithms have been proposed to automatically find spectral endmembers in hyperspectral data sets. Perhaps one of the most popular ones is the pixel purity index (PPI), available in the ENVI software from Exelis Visual Information Solutions. Although the algorithm has been widely used in the spectral unmixing community, it is highly time consuming as its precision increases asymptotically...

Recen t studies on cytoplasmic microtubules have provided evidence for regarding t hem as gel components susceptible to solational weakenings. Micro tubule s tructure in various cell types has been shown to be sensitive to temperature , pH, pressure, and other envi ronmenta l conditions (Masser and Philpott , 1966; Ti lney et al., 1966; Ti lney and Porter, 1967). In the present work, the sciati...