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Mostrando ítems 11-17 de 17

#### Semi-automatic detection of the evolutionary forms of visceral leishmaniasis in microscopic blood smears

(IOP Publishing, 2019)

Leishmaniasis is a complex group of diseases caused by obligate unicellular and
intracellular eukaryotic protozoa of the leishmania genus. Leishmania species generate diverse
syndromes ranging from skin ulcers of spontaneous resolution to fatal visceral disease. These
syndromes belong to three categories: visceral leishmaniasis, cutaneous leishmaniasis and
mucosal leishmaniasis. The visceral leishmaniasis is based on the reticuloendothelial system
producing hepatomegaly, splenomegaly and lymphadenopathy. In the present article, a ...

#### Renal lithiasis detection in uro-computed tomography using a non-parametric technique

(IOP Publishing, 2019)

Renal lithiasis is the pathology that causes nephritic colic, which is one of the most frequent reasons for consultation in emergency medical services. According to the size, location, hardness and number of stones present in the urinary system, usually in the human kidney, it is established to which form of treatment is suitable for the patient. These kidney stones can be analyzed by means of biopsy or imaging modalities such as computed tomography images. This type of images has challenging problems called noise, artifacts and low contrast. In ...

#### Newton-Raphson method initialization for non-analytical equations solution linked to anticipated annuities

(IOP Publishing, 2019)

The series of payments made in equal intervals of time is known, in the world of
financial mathematics, as an annuity. An anticipated annuity is one whose periodic payment
expires at the beginning of the established payment interval. The non-analytical equation that
allows us to calculate the interest rate, linked to the anticipated annuity, can be solved using
several numerical methods, in particular, the numerical method called Newton-Rhapson. The
main problem with this method is its initialization, which requires of one starting point ...

#### The rubric as an assessment strategy in the mathematical argumentation process

(IOP Publishing, 2020)

The article shares the proposal of an analytical rubric as a strategy for the assessment and monitoring of learning outcomes in students who develop an argumentative plot from the mathematics field, to solve any problem situation in daily life. The study was based on the theory of mathematical argumentation proposed by Duval and the contributions of León and Calderón, as well as the dimensions presented to us by the logical frameworks in the design of analytical rubrics. The research was developed under the social critical paradigm through the ...

#### Problem solving strategy in the teaching and learning processes of quantitative reasoning

(IOP Publishing, 2019)

The study presents an analysis of Polya's problem-solving strategy used in the training
processes of quantitative reasoning competence in students of the Universidad Simón Bolívar,
San José de Cúcuta, Colombia. The research was based on a descriptive design and had an
intentional sample of 58 students who were studying the sciences and general competencies
elective. For the collection of information, a diagnostic test (pre-test) and a final test (post-test)
were applied, in order to check the incidence of the applied strategy. The results ...

#### Semi-automatic detection of hepatic tumor in computed tomography images

(IOP Publishing, 2019)

In this work, the main purpose is develop a computational segmentation strategy for
liver tumor semiautomatic detection. This strategy considers three-dimensional computed
tomography images and it consists of techniques application that, on the one hand, diminish the
noise and detect the edges of the objects present in those images and, on the other hand, generate
the liver tumor morphology. For this, the sequence of techniques composed of gaussian
smoothing, gradient magnitude, median filter, region growing and binary morphological dilation
are ...

#### Volumetric quantification in ovarian pathology using abdomino-pelvic computed tomography

(IOP Publishing, 2019)

Pathological ovary is categorized into cystic tumors, solid tumors and mixed,
according to the content of the affected ovary. Accordingly, the degree of benignity or
malignity thereof is established. The imaging study for the preliminary morphological
assessment of PO is ultrasound, in its pelvic and transvaginal modalities, for which wellestablished
criteria are available. Once the ultrasound findings suggest malignancy,
complementary studies such as abdominal-pelvic tomography images and tumor markers are
requested. This type of images ...