1
2
artículo
Publicado 2017
Enlace
Enlace
The aim of this work is to design, implement and validate a primary communication system based on a brain-computer interface. There are people who-for various reasons-are affected in their ability to externalize their communication, however, they receive and process information from different sources. This system would allow basic communication-allowing the user to answer closed questions-through thought. The system was implemented by analyzing and interpreting electrical signals from brain activity, collected through electrodes attached to the scalp. The analog electrical signals were received by a data acquisition system and digitized for computer analysis. We implemented different signal processing techniques, pattern analysis, and classification and discrimination methods. By analyzing these signals and interpreting the electrical patterns, was achieved understand answers to simple q...
3
artículo
Publicado 2015
Enlace
Enlace
The author has studied the contraceptive effect of 2 mg. of quinestrol administered the 2nd day and 22 day of the cycle plus 2.5 mg. of quingestanol acetate in the 22 day: 256 women with a total of 2610 cycles were studied; none of the women became pregnant during the treatment. The side effects registered nausea, vomiting, cephalea and mastalgia as well as mucorrhea; in most of the patients these symptoms had dissapeared of the 5th cycle of treatment intermenstrual spotting was observed in the first three months with an incidence of 25% and 24.6% then diminished to 4,9 and 3%. The laboratory data did not show modifications in these women.
4
artículo
Publicado 2015
Enlace
Enlace
The author has studied the contraceptive effect of 2 mg. of quinestrol administered the 2nd day and 22 day of the cycle plus 2.5 mg. of quingestanol acetate in the 22 day: 256 women with a total of 2610 cycles were studied; none of the women became pregnant during the treatment. The side effects registered nausea, vomiting, cephalea and mastalgia as well as mucorrhea; in most of the patients these symptoms had dissapeared of the 5th cycle of treatment intermenstrual spotting was observed in the first three months with an incidence of 25% and 24.6% then diminished to 4,9 and 3%. The laboratory data did not show modifications in these women.
5
artículo
Publicado 2019
Enlace
Enlace
The present work is the study of the different methods used to determine the toxicity produced by the presence of a contaminating metal in the blood. Mainly, the presence of lead in the blood was taken as a reference to focus the work, knowing that metals like Cadmium (Cd) and Mercury (Hg) are also toxic to health and the environment. Although the information is extensive on the methods to be studied and in some cases it is not detailed to define each process, a comparative study of the most relevant and currently used methods can be carried out, taking into account that the choice will be defined according to the main characteristics of each one. Although all agree to be electrochemical processes, there are details to know which method to choose, either by sensitivity, economic or even structural factors, such as having a laboratory for its development. Environmental pollution with toxi...
6
7
artículo
Publicado 2020
Enlace
Enlace
Electrochemical techniques have been generating great interest due to their wide range of applications and their ease of use. For this reason, in recent years' electrochemical techniques such as cyclic voltammetry, anodic voltametric stripping, chronoamperometry and linear voltammetry have been developed. Linear voltammetry is one of the most widely used electrochemical techniques, where a voltage range is applied to a solution with the analyte and then current data is collected as a response. For this, an electrochemical cell with its 3 electrodes (working electrode, counter electrode, reference electrode) and a device for voltage control and current evaluation (potentiostat) is used. A potentiostat is an electronic device that allows the voltage or current to be regulated according to the electrochemical technique to be performed. The devices are usually very expensive due to their hig...
8
artículo
Publicado 2014
Enlace
Enlace
The diagnosis of ovine brucellosis in Chile is based on clinical examination of the testicles and confirmed with a serological test, being the complement fixation test, agar gel immunodiffusion test and the indirect ELISA the most used. The present study was carried out in the Municipality of San Ignacio, VIII Chilean region in 40 rams with the aim of comparing two diagnostic tools: testicular palpation and indirect ELISA for the antibody detection against Brucella ovis. The results showed 12 (30%) rams positive to testicular palpation and 5 rams (12.5%) positive to ELISA, where the level of agreement between the two diagnostic tests was poor (k=0.0714). Positive rams to brucellosis based on testicular palpation are not necessarily infected with B. ovis.
9
artículo
Publicado 2015
Enlace
Enlace
La diabetes mellitus 2 (DM2) se agudiza cuando las personas no se adhieren a su tratamiento.Se requiere evaluar los factores que influyen favorablemente al logro de la adherencia terapéutica. Objetivo. Evaluar la relación entre la autoeficacia y la adherencia terapéutica en pacientes con DM2 atendidos en la Unidad de Medicina Familiar No. 48 (UMF 48) del Instituto Mexicano del Seguro Social (IMSS). Método. Descriptivo – correlacional con 314 participantes. Se aplicaron la Escala de Adherencia al Tratamiento de la Diabetes Mellitus tipo II versión III (EATDM - III) y el Spanish Diabetes Self-Efficacy. Resultados. La autoeficacia se relacionó positiva y significativamente con la adherencia terapéutica (r = .400, p < 0.01). Las personas autoeficaces fueron 3.46 veces más adherentes a su tratamiento que las no autoeficaces (RM = 3.46, p < .05). Discusión y conclusiones. Los ...
10
artículo
Publicado 2021
Enlace
Enlace
The present paper is a comparison of three types of e-learning management systems. In the research administration of the University of Sciences and Humanities, a platform of online courses is aimed to achieve training and project courses that will be focused on the institution's researchers. For this purpose, it is necessary to use tools adapted to the way of working that are user-friendly and can be adapted to the users' requirements. Therefore, the three platforms' comparison was performed by measuring the following points: Description of the platforms' characteristics, description of the functionality, and the comparative analysis. This research is made to be implemented in the Image Processing Research Laboratory (INTI-Lab) server and to use the platform at the beginning of the year 2020. Online courses have become a tool that allows people to obtain knowledge rapidly, and as researc...
11
artículo
Publicado 2015
Enlace
Enlace
Diabetes mellitus 2 (DM2) is exacerbated when people do not adhere to their treatment. It requires evaluating the factors that influence favorably the achievement of adherence to treatment. Objective. Evaluate the relationship between self-efficacy and adherence to treatment in patients with DM2 served in Family Medicine Unit No. 48 (UMF 48) of the Instituto Mexicano del Seguro Social (IMSS). Method. Descriptive-correlational with 314 participants. Were applied the Scale of Adherence to the Treatment of Diabetes Mellitus Type II version III (EATDM - III) and the Spanish Diabetes Self-Efficacy. Results. Self-efficacy is positively and significantly associated with adherence to treatment (r = .400, p < 0.01). People self-efficient were 3.46 times more adherent to their treatment than those who were not self-efficient (RM = 3.46, p < .05). Discussion and conclusions. The findings of t...
12
artículo
Publicado 2014
Enlace
Enlace
The diagnosis of ovine brucellosis in Chile is based on clinical examination of the testicles and confirmed with a serological test, being the complement fixation test, agar gel immunodiffusion test and the indirect ELISA the most used. The present study was carried out in the Municipality of San Ignacio, VIII Chilean region in 40 rams with the aim of comparing two diagnostic tools: testicular palpation and indirect ELISA for the antibody detection against Brucella ovis. The results showed 12 (30%) rams positive to testicular palpation and 5 rams (12.5%) positive to ELISA, where the level of agreement between the two diagnostic tests was poor (k=0.0714). Positive rams to brucellosis based on testicular palpation are not necessarily infected with B. ovis.
13
artículo
Publicado 2017
Enlace
Enlace
Autism spectrum disorder (ASD) currently affects nearly 1 in 160 children worldwide. In over two-thirds of evaluations, no validated diagnostics are used and gold standard diagnostic tools are used in less than 5% of evaluations. Currently, the diagnosis of ASD requires lengthy and expensive tests, in addition to clinical confirmation. Therefore, fast, cheap, portable, and easy-to-administer screening instruments for ASD are required. Several studies have shown that children with ASD have a lower preference for social scenes compared with children without ASD. Based on this, eye-tracking and measurement of gaze preference for social scenes has been used as a screening tool for ASD. Currently available eye-tracking software requires intensive calibration, training, or holding of the head to prevent interference with gaze recognition limiting its use in children with ASD.
14
artículo
Una sola lesión realzada en el parénquima cerebral, también llamado granuloma inflamatorio, es un diagnóstico neurológico frecuente. Una de las causas más comunes de esta lesión es la neurocisticercosis humana, la infección por las larvas de la tenia porcina, Taenia solium. Luego de la demostración de que los quistes de cisticercosis viables sobreviven en buenas condiciones durante varios años en el cerebro humano, los granulomas de cisticerco individual se han interpretado de manera sistemática como una degeneración tardía de un parásito de larga data. Sobre la base de la evidencia epidemiológica, clínica y de laboratorio detallada en este artículo, planteamos la hipótesis de que, en la mayoría de los casos, estas lesiones inflamatorias se corresponden con parásitos que mueren en los primeros pasos de la infección, probablemente como resultado natural de la inmunida...
15
objeto de conferencia
Pneumonia is one of the major causes of child mortality. Unfortunately, in developing countries there is a lack of infrastructure and medical experts in rural areas to provide the required diagnostics opportunely. Lung ultrasound echography has proved to be an important tool to detect lung consolidates as evidence of pneumonia.
16
objeto de conferencia
Publicado 2017
Enlace
Enlace
Pneumonia is one of the major causes of child mortality, but it is curable if one can achieves early diagnostics. Unfortunately, in developing countries there is a lack of infrastructure and medical experts in rural areas to provide the required diagnostics opportunely. Lung ultrasound echography has proved to be an important tool to detect lung consolidates as evidence of pneumonia. The use of ultrasound to detect pneumonia is limited by the image analysis for interpretation, which is carried by human experts. Pattern recognition and image analysis is a potential tool to facilitate recognition of pneumonia consolidates in absence of medical experts for automatic diagnostics. To perform an automatic analysis of lung ultrasound images for pneumonia detection, the noise introduced by the image portion of the skin, notably complicates the processing and interpretation. This paper presents a...
17
artículo
Publicado 2018
Enlace
Enlace
Pneumonia is one of the major causes of child mortality, yet with a timely diagnosis, it is usually curable with antibiotic therapy. In many developing regions, diagnosing pneumonia remains a challenge, due to shortages of medical resources. Lung ultrasound has proved to be a useful tool to detect lung consolidation as evidence of pneumonia. However, diagnosis of pneumonia by ultrasound has limitations: it is operator-dependent, and it needs to be carried out and interpreted by trained personnel. Pattern recognition and image analysis is a potential tool to enable automatic diagnosis of pneumonia consolidation without requiring an expert analyst. This paper presents a method for automatic classification of pneumonia using ultrasound imaging of the lungs and pattern recognition.
18
artículo
Publicado 2018
Enlace
Enlace
This work was partially supported by the Fogarty International Center/NIH (training grant numbers D43TW001140 and D43TW007393) and by the National Council for Science, Technology and Innovation of Peru (CONCYTEC).
19
artículo
Publicado 2020
Enlace
Enlace
The use of L protein coupled magnetic particles for the concentration and purification of immunoglobulin M (mIgM) monoclonal antibodies against Taenia solium was evaluated. Three concentration methods and different elution times were evaluated and the ratio of particles to the ratio of mIgM was optimized. It is demonstrated that: 1) with the use of magnetic particles, a previous concentration of mIgM is not required, which reduces the manipulation of the antibodies and improves the recovery, 2) the use of a binding buffer can be omitted, since the pH of most cell culture supernatants are neutral, and 3) longer elution times (~ 45 minutes) are needed to increase recovery to a level greater than 80%. The study demonstrates that the use of L protein-coupled magnetic particles is a simple and efficient tool for mIgM concentration and purification. © 2020, Instituto Nacional de Salud. All ri...
