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Search Results: 1 - 10 of 11622 matches for " Claudia Ximena; "
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ESTUDIOS SOBRE LOCALIZACIóN AUDITIVA EN ETAPAS TEMPRANAS DEL DESARROLLO INFANTIL
Hug,Mercedes Ximena; Arias,Claudia;
Revista Latinoamericana de Psicología , 2009,
Abstract: the capacity to perceive if the sound that listening comes from the left or right, above or down, behind or ahead and what so close or far is the sonorous source is of capital importance both for animals and human beings. systematic research about developmental aspects involved in this ability begins in the 80's. the aim of this paper is to review the experimental research about the ability to localize direct and reflected sound in neonates and infants. the main explicative hypotheses about the developmental changes observed in auditory localization and the topics that still challenge experts are discussed.
Efficacy of Orbscan II? and Pentacam? topographers by a repeatability analysis when assessing elevation maps in candidates to refractive surgery
Nú?ez,María Ximena; Blanco,Claudia;
Biomédica , 2009,
Abstract: introduction: anterior and posterior corneal elevations are measurements used to detect keratoconus suspects. purpose: to determine the efficacy of orbscan ii? and pentacam? when assessing their elevation maps. materials and methods: the efficacy of the orbscan ii and pentacam measuring the anterior and posterior corneal elevations were evaluated in a sample of 68 eyes. the concordance between the two devices and the coefficient of repeatability were measured following the parameters of the british standard institution by the bland-altman concordance analysis and the lin concordance correlation coefficient. results: the coefficient of repeatability at the point of maximum anterior elevation was 68.29% with the orbscan and 24.20% with the pentacam. the concordance correlation coefficient was 0.64 (ci 95%: 0.48-0.76) with the orbscan and 0.94 with the pentacam (ci 95%: 0.91-0.96). the coefficient of repeatability at the point of maximum posterior elevation was 38.7% with the orbscan and 68.0% with the pentacam. the concordance correlation coefficient was 0.69 with the orbscan (ci 95%: 0.55-0.80) with a precision of 0.71 and an accuracy of 0.97, and 0.24 with the pentacam (ci 95%: 0.00-0.45) with a precision of 0.24 and an accuracy of 0.99. conclusions: measurement of the point of maximum posterior elevation is better with the orbscan ii and less precise with the pentacam. the random error can be reduced by using the mean of three assessments and can serve as a guide in the search of diagnostic devices with minimum absolute relative error in all measurements.
Posterior elevation maps and mean power keratometric maps to evaluate keratoconus and guide Intacs implantation: a step towards improving Intacs nomogram
Nú?ez,María Ximena; Blanco,Claudia;
Colombia Médica , 2008,
Abstract: introduction: keratoconos is a cornea disorder that affects young people and is a contraindication for refractive surgery; it could be treated with contact lens, corneal transplantation or with intracorneal ring segments (intacs) insertion. purpose: to compare mean power keratometric maps and posterior elevation maps in delineating keratoconus characteristics and guide intacs implantation. methods: 23 eyes with keratoconus, 12 subjects, cone area, cone radii, cone peak area and coordinates were measured using both maps and were compared using t test. statistical significance was defined as p<0.05. correlations were assessed with pearson?s coefficient. results: mean cone area was 17.65 mm2 ± 4.63 and 35.68 mm2 ± 9.72 in posterior elevation map and mean power keratometric analysis respectively (p 0.00). both posterior elevation and mean power keratometric maps finds a similar percentage split between centre cones (cc) and de-centered cones (dc) of 78:22. however, 9% cases were found not to match after case to case evaluation. conclusion: based on the cases that not matched the cone centration, we suggest a new way to define the cone centre using the mean power keratometric map. therefore, it should be review the decisions to implant symmetric rings vs. asymmetric rings using posterior elevation map. a new parameter is discussed ?cone peak centration? in de-centered cones (dc).
ESTUDIO DE CASO: DéFICIT DE ATENCIóN DESDE LA PERSPECTIVA CLíNICA Y EDUCATIVA
González Moreno1,Claudia Ximena;
Revista Facultad de Medicina de la Universidad Nacional de Colombia , 2011,
Abstract: background. a historical-cultural approach has shown the usefulness of implementing preventative and corrective programmes regarding development and learning problems, especially regarding lack of attention, using directive functions of language. objective. identifying the impact of a method involving directive functions of language for correcting lack of attention. materials and methods. two cases are presented. one was considered experimental involving a correction programme using directive functions of language and the other was a control involving pharmacological treatment. the children were neuro-psychologically evaluated in both cases before and after the intervention programme being implemented. the control child received pharmacological treatment. results. initial evaluation revealed regulation and control flaws and consolidation of internal images of objects in both cases. final evaluation revealed positive changes in programming and control, as well as in using external verbal language in the experimental case. no changes were noted in the control case regarding initial evaluation. conclusion. the results showed that a programme involving directive functions of language could have important effects regarding the cognitive sphere and all spheres of an infant's psyche. this was seen regarding the emotional-affective sphere involving behavioural and personality, motives and interests, as the experimental child achieved important advances in all activities requiring regulation and control of such activity. the child also began to use his own language to organise, direct and regulate his academic activities.
Formación del pensamiento reflexivo en estudiantes universitarios (Training Reflexive Thinking in University Students) (Formation de la pensée réflexive chez les étudiants universitaires) (Forma o do pensamento reflexivo em estudantes universitários)
Claudia Ximena González-Moreno
Magis International Journal of Research in Education , 2012,
Abstract: ResumenSe parte del soporte científico y conceptual del enfo- que histórico-cultural de Lev Semiónovich Vygotsky para presentar los resultados de una investigación des- criptiva, sobre el quehacer educativo en el aula por lo que se establece una interacción dialéctica entre teoría y práctica. El objetivo fue la formación del pensamien- to reflexivo en estudiantes universitarios en la licencia- tura en Pedagogía Infantil, en la clase Teorías cogniti- vas del aprendizaje. Los resultados muestran que las acciones pedagógicas pueden impactar positivamente la consolidación de los procesos de aprendizaje y que el pensamiento reflexivo se constituye en el motor del cambio mediante el uso intencionado del lenguaje.AbstractThe starting point of this paper is the scien- tific and conceptual framework of Vygotsky's cultural-historical approach, which is used to present the results of a descriptive research work on classroom activities, establishing a dialectic interaction between theory and practice. The aim was to train reflexive thin- king in university students of the teacher training course in Children's Pedagogy, more specifically a subject in Cognitive Theories of Learning. The results show that pedagogical actions can have a positive impact on the consolidation of learning processes. Reflexive thinking is an agent of change through inten- tional use of language.RésuméLe point de départ de cette étude est la base scientifique et conceptuelle de la perspective historico-culturelle de Vygotsky pour présen- ter les résultats d'une recherche de type des- criptive, par rapport au travail éducatif dans la salle de classe, c'est pourquoi on a établit l'interaction dialectique entre la théorie et la pratique. L'objectif a été la formation de la pensée réflexive chez les étudiants univer- sitaires dans la carrière de Pédagogie pour l'enfance, à travers le cours Théories Cogni- tives de l'apprentissage. Les résultats mon- trent que les actions pédagogiques peuvent impacter positivement dans la consolidation des processus d'apprentissage, ainsi la pen- sée réflexive se constitue dans le moteur du changement par le biais de l'usage intention- née du langage.ResumoParte-se da base científica e conceitual do enfoque histórico-cultural de Vygotsky para apresentar os resultados de uma pesquisa de tipo descritivo sobre a a o educativa na sala de aula, estabelecendo-se uma intera o dialética entre teoria e prática. O objetivo é a forma o do pensamento reflexivo em es- tudantes universitários na Licenciatura em Pedagogia Infantil, através da aula de Teorias Cognitivas da Ap
ESTUDIO DE CASO: DéFICIT DE ATENCIóN DESDE LA PERSPECTIVA CLíNICA Y EDUCATIVA A case study regarding lack of attention from a clinical and educational perspective
Claudia Ximena González Moreno1
Revista Facultad de Medicina de la Universidad Nacional de Colombia , 2011,
Abstract: Antecedentes. El enfoque histórico-cultural ha evidenciado la utilidad en la implementación de programas preventivos y correctivos de problemas en el desarrollo y del aprendizaje, especialmente en lo que se refiere al déficit de atención, utilizando las funciones directivas del lenguaje. Objetivo. Identificar el impacto del método de corrección del déficit de atención, en donde se usan las funciones directivas del lenguaje. Material y métodos. Se presentan dos casos. Uno es considerado como experimental, que participa de un programa de corrección utilizando las funciones directivas del lenguaje; y el otro como control, que participa de tratamiento farmacológico. En los dos casos, se evalúa a los ni os a nivel neuropsicológico antes y después de la implementación del programa interventivo. El caso control recibe tratamiento farmacológico. Resultados. La evaluación inicial evidenció fallas en el factor de regulación y control, así como en la consolidación de las imágenes internas de los objetos en los dos casos. La evaluación final mostró cambios positivos en programación y control, así como en la utilización del lenguaje verbal externo en el caso experimental. El caso control no evidenció cambios respecto a la evaluación inicial. Conclusión. Los resultados muestran que el programa en el que se usan las funciones directivas del lenguaje puede tener efectos importantes no sólo en la esfera cognoscitiva, sino sobre todas las esferas de la psique infantil: la esfera emocional-afectiva, de motivos e intereses, comportamental y de personalidad; esto se evidencia porque el ni o experimental logró avances importantes en todas las actividades que requieren de la regulación y control de la actividad. Además, el ni o empezó a utilizar su propio lenguaje para organizar, dirigir y regular sus actividades a nivel escolar. Background. A historical-cultural approach has shown the usefulness of implementing preventative and corrective programmes regarding development and learning problems, especially regarding lack of attention, using directive functions of language. Objective. Identifying the impact of a method involving directive functions of language for correcting lack of attention. Materials and methods. Two cases are presented. One was considered experimental involving a correction programme using directive functions of language and the other was a control involving pharmacological treatment. The children were neuro-psychologically evaluated in both cases before and after the intervention programme being implemented. The control child received pharmacological treat
Estudios sobre localización auditiva en etapas tempranas del desarrollo infantil
Mercedes Ximena Hüg,Claudia Arias
Revista Latinoamericana de Psicología , 2009,
Abstract: La capacidad para percibir si el sonido que se escucha proviene desde la izquierda o derecha, arriba o abajo, detrás o adelante y qué tan cerca o lejos se encuentra la fuente sonora es de importancia capital tanto para animales como para seres humanos. La investigación sistemática sobre los aspectos evolutivos involucrados en el desarrollo de esta habilidad comenzó recién en la década del 80. El propósito de este trabajo es realizar una revisión de las principales investigaciones sobre el desarrollo de la habilidad para localizar sonidos directos y reflejados en neonatos y ni os peque os. Se discuten las principales hipótesis explicativas de los cambios evolutivos observados en esta habilidad y los tópicos que aún desafían a los expertos.
Eficacia del Orbscan II y Pentacam en la evaluación de los mapas de elevación en candidatos a cirugía refractiva mediante un análisis de repetibilidad Efficacy of Orbscan II and Pentacam topographers by a repeatability analysis when assessing elevation maps in candidates to refractive surgery
Claudia Blanco,María Ximena Nú?ez
Biomédica , 2009,
Abstract: Introducción. La elevación posterior es una de las medidas usadas para detectar pacientes con sospecha de queratocono. Objetivo. Determinar la eficacia del Orbscan II y Pentacam en la evaluación de los mapas de elevación. Materiales y métodos. Se evaluaron 68 ojos con Orbscan II y Pentacam. Con parámetros del British Standard Institution, se midieron el coeficiente de repetibilidad mediante un análisis de concordancia con el método de Bland-Altman y el coeficiente de correlación de concordancia de Lin. Se midió la concordancia entre ambos equipos. Resultados. El coeficiente de repetibilidad del punto de máxima elevación anterior en Orbscan fue de 68,29% y de 24,20% en Pentacam. El coeficiente de correlación de concordancia fue de 0,64 (IC95% 0,48-0,76) en Orbscan y en Pentacam fue de 0,94 (IC95% 0,91-0,96). El coeficiente de repetibilidad del punto de máxima elevación posterior en Orbscan fue de 38,69% y en Pentacam fue 68,03%. El coeficiente de correlación de concordancia en Orbscan fue de 0,69 (IC95% 0,55-0,80) con una precisión de 0,71 y una exactitud de 0,97, y en Pentacam fue de 0,24 (IC95% 0,00-0,45) con una precisión de 0,24 y una exactitud de 0,99. Conclusiones. La eficacia de Orbscan II y Pentacam en la evaluación del punto de máxima elevación posterior resulta afectada por la imprecisión de la medida y es peor en el Pentacam. Este error aleatorio se puede manejar usando la media de tres mediciones y nos orienta a la búsqueda de equipos en los que el error relativo absoluto sea el menor posible en todas las medidas que ofrezca. Introduction: Anterior and posterior corneal elevations are measurements used to detect keratoconus suspects. Purpose: To determine the efficacy of Orbscan II and Pentacam when assessing their elevation maps. Materials and methods: The efficacy of the Orbscan II and Pentacam measuring the anterior and posterior corneal elevations were evaluated in a sample of 68 eyes. The concordance between the two devices and the coefficient of repeatability were measured following the parameters of the British Standard Institution by the Bland-Altman concordance analysis and the Lin concordance correlation coefficient. Results: The coefficient of repeatability at the point of maximum anterior elevation was 68.29% with the Orbscan and 24.20% with the Pentacam. The concordance correlation coefficient was 0.64 (CI 95%: 0.48-0.76) with the Orbscan and 0.94 with the Pentacam (CI 95%: 0.91-0.96). The coefficient of repeatability at the point of maximum posterior elevation was 38.7% with the Orbscan and 68.0% with the Pentacam. The concord
Posterior elevation maps and mean power keratometric maps to evaluate keratoconus and guide Intacs implantation: a step towards improving Intacs nomogram
María Ximena Nú?ez,Claudia Blanco
Colombia Médica , 2008,
Abstract: SUMMARYIntroduction: Keratoconos is a cornea disorder that affects young people and is a contraindication for refractive surgery; it could be treated with contact lens, corneal transplantation or with intracorneal ring segments (Intacs) insertion.Purpose: To compare mean power keratometric maps and posterior elevation maps in delineating keratoconus characteristics and guide Intacs implantation.Methods: 23 eyes with keratoconus, 12 subjects, cone area, cone radii, cone peak area and coordinates were measured using both maps and were compared using t test. Statistical significance was defined as p<0.05. Correlations were assessed with Pearson’s coefficient.Results: Mean cone area was 17.65 mm2 ± 4.63 and 35.68 mm2 ± 9.72 in posterior elevation map and mean power keratometric analysis respectively (p 0.00). Both posterior elevation and mean power keratometric maps finds a similar percentage split between centre cones (CC) and de-centered cones (DC) of 78:22. However, 9% cases were found not to match after case to case evaluation.Conclusion: Based on the cases that not matched the cone centration, we suggest a new way to define the cone centre using the mean power keratometric map. Therefore, it should be review the decisions to implant symmetric rings vs. asymmetric rings using posterior elevation map. A new parameter is discussed cone peak centration in de-centered cones (DC).
Reflective activity in Preschool Children: Psychological and Educational Prospects
Claudia Ximena González Moreno,Yulia Solovieva,Luis Quintanar Rojas
Universitas Psychologica , 2011,
Abstract: How to develop reflective thinking and what tools are most appropriateeducational psychology to contribute to that outcome are matters of concern on an ongoing basis both in the field of psychology and in the field of education. Numerous investigations have addressed the issue of the formation of reflective thought, but is concerned about the gap between scientific production and its application to the school to improve learning processes. This article presents a reflective analysis regarding the investigation carried out historical-cultural Psychology (Vygotsky) and activity theory (Leontiev,Talizina) where it was aimed at implementing the method of play role in the formation of reflective thinking in preschool Colombian population. The study is of mixed design, which incorporates elements of quasi-experimental pre/post and descriptive, guided by principles of microgenetic methodology. To do this we worked with 48 children aged between five and six years, divided into two groups: control and experimental. The analysis pretest/post-test allowed observing changes in the activity of school children in the experimental group, group to which he applied the method of role play, after the intervention. The study presents an innovative form of assistance to the gradual formation of intellectual activity stages within the classroom, also constitutes a possibility of transforming current teaching practices.
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