Fabiana Rodrigues Leta

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Facial aging is a biological phenomenon. Skin properties change with time, and gravity and facial expressions exert mechanical deformation. Knowledge of these alterations may suggest ways to reverse them by identifying the corresponding distortional forces. The aim of this study was to determine a pattern of change for parameters of the face during the(More)
The vocal cords play an important role on voice production. Air coming from the lungs is forced through the narrow space between the two vocal cords that are set in motion in a frequency that is governed by the tension of the attached muscles. The motion of the vocal cords changes the type of flow, that comes from the lungs, to pulses of air, and as the(More)
BACKGROUND Skin expansion is a physiological process that is defined as the ability of the human skin to increase its superficial area in response to stress or to a given deformation. Skin expanders are silicon bags that are implanted underneath the skin. Because the skin presents creep or relaxation, the resulting stress decreases after a time due to the(More)
This paper presents a methodology for roughness analysis based on surface characteristics of images obtained from optical and electronic microscopes. Texture analysis has been widely used in different fields, such as medical image analysis, visual interpretation of remote sensing images, image search and industrial quality inspection of manufactured(More)
This paper explores the use of an hierarchical neurofuzzy model for image classification of macroscopic rock texture. The relevance of this study is to help Geologists in diagnosing and planning the oil reservoir exploitation. The same approach can be also applied to metals, in order to classify the different types of materials based on their grain texture.(More)
We used a Hierarchical Neuro-Fuzzy Class Method based on binary space partitioning NFHBClass Method for macroscopic rock texture classification. The relevance of this study is in helping Geologists in the diagnosis and planning of oil reservoir exploration. The proposed method is capable of generating its own decision structure, with automatic extraction of(More)
  • Fernando B. Mainier, Luciane P. C. Monteiro, Sérgio S. M. Tavares, Fabiana R. Leta, Juan M. Pardal
  • 2013
Currently, the use of titanium alloys components and coating (clad) in petroleum subsea production systems continues to increase. Titanium alloys are lightweight, very flexible; have greater mechanical resistance relationship showing excellent resistance to corrosion and fatigue in ambient seawater and marine environments. The rate of corrosion of titanium(More)
This paper presents a system for detecting angular position of warships, using features extraction techniques from acquired digital imaging and artificial neural networks. The used ships images are graphically generated by three-dimensional solid modeling software. Different groups of features are considered. They are obtained from modelled ships at(More)