Segmentation of thoracic X-Ray Computed Tomography images is a mandatory pre-processing step in many automated or semi-automated analysis tasks such us region identification, densitometric analysis, or even for 3D visualization purposes when a stack of slices has to be prepared for surface or volume rendering. In this work, we present a fully automated and fast method for pulmonary contour extr...

Software development models have been ripen since the emergence of software engineering, like waterfall model, V-model, spiral model, etc. To ensure the successful implementation of those models, various metrics for software products and development process have been developed along, like CMMI, software metrics, and process re-engineering, etc. The quality of software products and processes can...

Recent advancements in the inhalable, injectables, transdermal, nasal and other routes of administration, the unavoidable truth is that oral drug administration has been the preferred route for the drug delivery. There are sure components like poor medication solvency or retention, quick digestion system, high change in the medication plasma level and variability in quick and encouraged impact,...

Macroreentrant atrial tachyarrhythmias (MRATs) can be caused by different reentrant circuits. The treatment for each MRAT type may require ablation at sites, either the right or left atria. Unfortunately, circuit that drives arrhythmia cannot ascertained previous to electrophysiological intervention. A noninvasive approach based on comparison of vectorcardiogram (VCG) loops is proposed. An arch...

Recently, a continuous-time compartmental mathematical model for the spread of Coronavirus disease 2019 (COVID-19) was presented with Portugal as case study, from 2 March to 4 May 2020, and local stability Disease Free Equilibrium (DFE) analysed. Here, we propose an analogous discrete-time and, using suitable Lyapunov function, prove global DFE point. Using COVID-19 real data, show, through num...

<p style='text-indent:20px;'>In this work, we will introduce a general framework to derive the thermodynamics of fluid mechanical system, which guarantees consistence between energetic variational approaches with laws thermodynamics. In particular, focus on coupling thermal and forces. We follow for classical gas ideal equilibrium present existences weak solutions thermodynamic system cou...

Abstract A microcontinuum description of compressible liquid crystals is examined accounting for a constitutive model based on mass microdensity. As first point, we discuss the effectiveness micropolar theory continua, which limited to static problems. Then, by micromorphic representation density, show consistence some classical models nematic and remark their connection with microinertia tenso...

In the paper, we study two-loop contribution to effective action of four-dimensional quantum Yang-Mills theory. We derive a new formula for in terms three functions, formed from Green's function expansion near diagonal. This result can be applied different types regularization. Therefore, test it by using dimensional regularization and cutoff ones show consistence with results, obtained other w...

In this paper, we proposed a family of r-points 1-block implicit methods with optimized region stability. This is derived Mathematical 10.4 software and the stability investigated using boundary locus techniques. The block are consistence, zero stable, A-stable satisfy other requirements which finds them suitable for stiff problems in ODEs. Numerical experiments presented results compared exact...

Soil morphological properties described in the field, such as texture, consistence or structure, provide a valuable tool for evaluation of soil productivity potential. In this study, we developed regression model between variables banana plantations and crop Productivity Index (PI) previously same areas Venezuela. For this, implemented categorical regression, an optimal scaling procedure which ...