Papers by Angelica Nahomi Hernandez
Revista Electrónica Educare, 2014
Recibido 31 de julio de 2013 • Corregido 19 de octubre de 2013 • Aceptado 30 de octubre de 2013E... more Recibido 31 de julio de 2013 • Corregido 19 de octubre de 2013 • Aceptado 30 de octubre de 2013Este artículo presenta las vivencias del grupo de estudiantes de la Universidad Nacional de Costa Rica con una condición de discapacidad o que presenta necesidades educativas en su formación profesional. De acuerdo con la experiencia generada desde el quehacer del proyecto UNA Educación de Calidad en el contexto universitario, en los años 2008 al 2012, el equipo de trabajo tomó la decisión de reflexionar sobre las formas de apoyo y el seguimiento a este grupo de la diversidad, específicamente valora las acciones del trabajo colaborativo realizado por el grupo de participantes en el proyecto mediante la modalidad de talleres durante este periodo. Para una mayor comprensión de la propuesta desarrollada, los diferentes talleres se agrupan por módulos según su temática. Los resultados muestran la complejidad y los matices de las acciones de colaboración entre el grupo de estudiantes con el fi...
Revista Electrónica Educare, 2013
Recibido 21 de octubre de 2012 • Corregido 12 de marzo de 2013 • Aceptado 13 de marzo de 2013 En ... more Recibido 21 de octubre de 2012 • Corregido 12 de marzo de 2013 • Aceptado 13 de marzo de 2013 En 1998 se crea, en la Universidad Nacional, el proyecto UNA educación de calidad, el cual proporciona atención directa a estudiantes que presentan una condición de discapacidad o necesidades educativas en su formación profesional. De acuerdo con la experiencia generada desde el quehacer del proyecto en el contexto universitario, en los años 2008 y 2010, el equipo de trabajo tomó la decisión de valorar las labores desarrolladas con el grupo de estudiantes de apoyo, para conocer los alcances en la atención proporcionada y promover los cambios requeridos. Este proceso se llevó a cabo mediante la modalidad de talleres, la cual permitía integrar la actuación de cada participante, tanto en forma individual como en grupo y en diferentes momentos. Se utilizaron guías de trabajo en grupo, con sesiones de discusión sobre el concepto de necesidades educativas y de análisis de las formas de apoyo util...
Revista Electrónica Educare, 2010
Recibido 22 de marzo de 2010 • Aceptado 24 de junio de 2010 • Corregido 03 de agosto de 2010 ... more Recibido 22 de marzo de 2010 • Aceptado 24 de junio de 2010 • Corregido 03 de agosto de 2010 Los servicios educativos son esenciales en el desarrollo social y económico de los pueblos, principalmente, para el progreso de todos los sectores de la sociedad. Establecer acciones que promuevan la participación de los diversos grupos sociales es esencial para mejorar su calidad de vida y la construcción de una sociedad más justa y respetuosa de los derechos humanos, sin ningún tipo de discriminación ni de exclusión. En los últimos años, el sistema educativo costarricense ha experimentado cambios significativos, debido al abordaje pedagógico de la educación integradora, en la cual se atiende a aquellos estudiantes con necesidades educativas que requieren diferentes apoyos y recursos especializados para su formación y desarrollo integral. Por lo anterior, en la División de Educación Básica del Centro de Investigación en Docencia y Educación, se generó la inquietud de investigar sobre ...
Revista Electrónica Educare, 2010
Recibido 16 de julio de 2010 • Aceptado 31 de agosto de 2010 • Corregido 04 de octubre de 2010 ... more Recibido 16 de julio de 2010 • Aceptado 31 de agosto de 2010 • Corregido 04 de octubre de 2010 Debido al marco jurídico actual, en los últimos años, el sistema educativo costarricense ha experimentado cambios significativos, tanto en los niveles internacional como nacional. Estos van desde la promulgación de la Ley 7600 Igualdad de Oportunidades para las Personas con Discapacidad en Costa Rica (Costa Rica, Asamblea Legislativa,1996) hasta el planteamiento de la Ley 8661 Convención sobre los Derechos Humanos de las Personas con Discapacidad (Costa Rica, Asamblea Legislativa, 2008). Por lo anterior, el espacio temporal en el que emergió el Proyecto UNA Educación de Calidad, en 1998 y el contexto en el cual estaba inmerso el Sistema Educativo Nacional, particularmente, en el ámbito universitario, la propuesta pedagógica que se presenta da muestra de una transición entre el modelo rehabilitador y el modelo social, específicamente, dentro de cada uno de estos, el respectivo abordaj...
Revista Electrónica Educare, 2009
Recibido 25 de mayo de 2009 • Aceptado 14 de setiembre de 2009 • Corregido 05 de octubre de 2009 ... more Recibido 25 de mayo de 2009 • Aceptado 14 de setiembre de 2009 • Corregido 05 de octubre de 2009 En el proceso de socialización, la familia tiene un papel fundamental en el cuidado y la crianza de los hijos y, principalmente, en la transmisión de conocimientos, valores y costumbres que les permita adaptarse a la sociedad como personas activas y productivas. En los últimos años, el sistema educativo costarricense ha experimentado cambios significativos, debido a los procesos de integración escolar de estudiantes que presentan necesidades educativas, porque requieren de diferentes apoyos y recursos especializados para su formación y su desarrollo integral. Por lo anterior, se generó la inquietud de investigar sobre el apoyo familiar en el proceso de integración escolar de estudiantes a los cuales se les aplica adecuación curricular significativa en una escuela pública y, de esta forma, determinar los tipos de apoyo que proporcionan los miembros de la familia, así como la forma en qu...
Botanical Sciences, 2017
La distilia es un polimorfismo floral en donde aproximadamente la mitad de las plantasen una pobl... more La distilia es un polimorfismo floral en donde aproximadamente la mitad de las plantasen una población tienen los estilos largos y los estambres cortos (Pin ) y la otra mitad estilos cortos y estambres largos (Thrum). Se ha sugerido que la posición relativa de anteras y estigmas en las flores distilicas promueve el flujo de polen entre flores de morfos opuestos (polinización legitima), en comparación con el flujo de polen entre flores del mismo morfo (polinización ilegítima). Estudiamos la morfología floral de ambos morfos (seis variables) en Palicourea padifolia (Rubiaceae) y encontramos diferencias significativas entre morfos florales en los rasgos que de finen al polimorfismo floral. Sin embargo las relaciones entre los rasgos morfológicos de las flores difieren entre morfos florales (morfo-especifico) y las relaciones significativas fueron más fuertes en el morfo con los estilos cortos. Los patrones de correlación entre algunos de los rasgos flora les sugieren presiones de selec...
Hexágono Pedagógico, 2011
El hombre como ser social, está inmerso en muchos contextos como es el familiar, escolar,laboral,... more El hombre como ser social, está inmerso en muchos contextos como es el familiar, escolar,laboral, deportivo entre otros, por tanto puede estar expuesto a tener conflictos con las personas que lo rodean. La presente investigación tuvo como objetivo general Fomentar la resolución de conflictos y el fortalecimiento de una cultura de paz en los niños y las niñas del Colegio Mixto Nuevo Porvenir del barrio El Pozón de la ciudad de Cartagena mediante la implementación de estrategias desde las inteligencias múltiples (inteligencia musical, cinestésica, interpersonal e intrapersonal). Las distintas estrategias utilizadas permitieron unir más a los educandos y conocer otras formas de resolver sus diferencias ,además, ser agentes activos en este proceso implica una mayor comprensión de la situación, no juzgar y diseñar actividades que les permitieran internalizar la teoría y la práctica y por lo tanto la transferencia a su propio contexto familiar y social.ABSTRACT:Man as a social being, is i...
Revista Electronica Educare, Aug 1, 2013
The Quality Education Project of the Universidad Nacional, Costa Rica (UNA Educacion de Calidad) ... more The Quality Education Project of the Universidad Nacional, Costa Rica (UNA Educacion de Calidad) was created in 1998 as a direct response channel for students with disabilities or educational needs in their professional training. Considering the experience generated throughout the project’s activity at the University in 2008 and 2010, the project team decided to evaluate the work that had been developed with the assistance of a group of students, in order to identify the results of services provided and make the appropriate changes. This process was implemented through workshops, which enabled the group to observe the performance of each participant, individually and collectively, at different times. During the workshops, group work guides were used in the discussion sessions on educational needs and assistance methods, an instrument with incomplete phrases was applied, a video on the issue being discussed was shown, and a final analysis was made on the feelings and emotions that emerged from the assistance activities. Among the main findings, this study points out a range of assistance methods developed by each student to respond to the educational needs of his/her peers, based on the personal and social conditions of each one of them; in addition to a number of spaces created for exchange and interaction. This helped both groups of students to work in the reconstruction of the traditional concept that is associated to the term of “disability” and further develop personal abilities and skills that will contribute to the students’ permanence in the university, as well as to their social and labor inclusion. The study provides useful recommendations to meet the needs of the student population participating in the Project, particularly in terms of follow-up and assistance methods, a challenge to be undertaken in the everyday activity of UNA Educacion de Calidad.
Revista De Investigacion Clinica, 2011
Pediatric Blood & Cancer, 2015
Background-In El Salvador, about 200 new cases of pediatric cancer are diagnosed each year, and s... more Background-In El Salvador, about 200 new cases of pediatric cancer are diagnosed each year, and survival rates approach 70%. Although treatment is available at no cost, abandonment of therapy has remained at a steady yearly rate of 13% during the past decade. A time sensitive adherence tracking procedure (TS-ATP) was recently implemented to detect missed appointments, identify their causes, and intervene promptly. Procedure-The study team was informed daily of patient/family failure to attend medical appointments in the pediatric oncology unit; the families were contacted and interviewed to ascertain and address the reasons. Patients who did not return after this initial contact were contacted again through local health clinics and municipalities. Law enforcement was a last resort for patients undergoing frontline treatment with a good prognosis., The system was adapted to clinical urgency: families of patients undergoing induction therapy were contacted within 24 hours, those in other therapy phases, within 48 hours, and those who had completed treatment, within one week. Reasons for absence were obtained by telephone or in person. Results-The annual rate of abandonment was reduced from 13% to 3% during the 2-year period. There were 1111 absences reported and 1472 contacts with caregivers and institutions. The three main reasons for absences were financial needs (165, 23%), unforeseen barriers (116, 16%), and domestic needs (86, 12%).
Studies in Computational Intelligence, 2009
ABSTRACT This paper presents a novel application of the interval type-1 non-singleton type-2 fuzz... more ABSTRACT This paper presents a novel application of the interval type-1 non-singleton type-2 fuzzy logic system (FLS) for one step ahead prediction of the daily exchange rate between Mexican Peso and US Dollar (MXNUSD) using the recursive least-squared (RLS)-back-propagation (BP) hybrid learning method. Experiments show that the exchange rate is predictable. A non-singleton type-1 FLS and an interval type-1 non-singleton type-2 FLS, both using only BP learning method, are used as a benchmarking systems to compare the results of the hybrid interval type-1 non-singleton type-2 FLS (RLS-BP) forecaster.
Brazilian Oral Research, 2012
The aim of this study was to determine whether image artifacts caused by orthodontic metal access... more The aim of this study was to determine whether image artifacts caused by orthodontic metal accessories interfere with the accuracy of 3D CBCT model superimposition. A human dry skull was subjected three times to a CBCT scan: at first without orthodontic brackets (T1), then with stainless steel brackets bonded without (T2) and with orthodontic arch wires (T3) inserted into the brackets' slots. The registration of image surfaces and the superimposition of 3D models were performed. Within-subject surface distances between T1-T2, T1-T3 and T2-T3 were computed and calculated for comparison among the three data sets. The minimum and maximum Hausdorff Distance units (HDu) computed between the corresponding data points of the T1 and T2 CBCT 3D surface images were 0.000000 and 0.049280 HDu, respectively, and the mean distance was 0.002497 HDu. The minimum and maximum Hausdorff Distances between T1 and T3 were 0.000000 and 0.047440 HDu, respectively, with a mean distance of 0.002585 HDu. In the comparison between T2 and T3, the minimum, maximum and mean Hausdorff Distances were 0.000000, 0.025616 and 0.000347 HDu, respectively. In the current study, the image artifacts caused by metal orthodontic accessories did not compromise the accuracy of the 3D model superimposition. Color-coded maps of overlaid structures complemented the computed Hausdorff Distances and demonstrated a precise fusion between the data sets.
Computación y Sistemas, 2014
This paper presents an application of adaptive neural networks based on a dynamic neural network ... more This paper presents an application of adaptive neural networks based on a dynamic neural network to trajectory tracking of unknown nonlinear plants. The main methodologies on which the approach is based are recurrent neural networks and Lyapunov function methodology and Proportional-Integral (PI) control for nonlinear systems. The proposed controller structure is composed of a neural identifier and a control law defined by using the PI approach. The new control scheme is applied via simulations to Chaos Synchronization. Experimental results have shown the usefulness of the proposed approach for Chaos Production. To verify the analytical results, an example of a dynamical network is simulated and a theorem is proposed to ensure tracking of the nonlinear system.
Neuropeptides, 2005
Galanin (GAL) has been implicated in modulating anxiety, although a precise role remains unclear.... more Galanin (GAL) has been implicated in modulating anxiety, although a precise role remains unclear. Previous studies revealed anxiolytic effects, anxiogenic effects, or no effect, depending on the test, brain region, route of drug administration and context. We have shown previously that microinjection of the GAL antagonist M40 into central amygdala blocked an anxiolytic response to acute stress on the elevated plus maze when rats were pretreated with yohimbine, suggesting an anxiolytic effect of GAL. By contrast, we also showed that microinjection of M40 into the lateral bed nucleus of the stria terminalis attenuated anxiety-like behavioral responses to stress on the plus maze and social interaction tests, implying an anxiogenic effect for GAL. The behavioral response to stress on both these tests is a reduction of an ongoing behavior (open-arm exploration or social interaction, respectively). To better understand the anxiety-modulating role of GAL, it is also important to ascertain its effect on a response that represents an activation rather than suppression of behavior. Thus, in this study, we investigated an active behavioral response to acute stress in rats, the shock-probe defensive burying response. Bilateral microinjections of M40 into lateral septum (LS), a region important to this response and innervated by GAL, dose-dependently decreased burying without affecting immobility. No change was seen in hindpaw withdrawal latency on a thermosensitivity assay, suggesting that the reduction in burying behavior was not attributable to changes in cutaneous pain sensitivity. These results indicate that in LS, GAL facilitates the active anxiety-like behavioral response on the defensive burying test, similar to its facilitatory effect on anxiety-like stress-induced suppression of behavior in the lateral bed nucleus. These results highlight the fact that, rather than a unified system-like role in modulating anxiety, the effects of GAL can be either facilitating or attenuating, and are region-specific, context-specific and response-specific.
Tetrahedron Letters, 2005
Based on an unusual furanose ring opening of 1,2-O-isopropylidene pentofuranoside derivatives, a ... more Based on an unusual furanose ring opening of 1,2-O-isopropylidene pentofuranoside derivatives, a preparation scheme of a new series of furanopyrimidine nucleoside analogues has been devised.
Synapse, 2005
Galanin is colocalized extensively with norepinephrine in brain. Although this suggests possible ... more Galanin is colocalized extensively with norepinephrine in brain. Although this suggests possible activity-dependent neurotransmitter interactions, the functional significance of such colocalization remains elusive. Previously, we showed that enhancing stress-activation of the noradrenergic system by yohimbine pretreatment released galanin in central amygdala, attenuating the anxiety-like behavioral response to stress on the elevated plus-maze. The present study was conducted to determine, in this context, whether galanin was indeed coreleased from noradrenergic terminals, or instead from another galanin afferent or local stress-responsive galanin neurons in the amygdala. In experiment 1, galanin-mediated anxiolytic effects on the plus-maze following yohimbine + stress were unaltered by lesioning the noradrenergic innervation of central amygdala. In experiment 2, combining immunohistochemistry and in situ hybridization, galanin neurons specifically activated by yohimbine + stress treatment were found only in the locus coeruleus and intraamygdalar bed nucleus of the stria terminalis, adjacent to central amygdala. In experiment 3, retrograde tracing combined with in situ hybridization revealed few if any galanin cells projecting to central amygdala in locus coeruleus or nucleus tractus solitarius, sources of noradrenergic innervation. Indeed, few retrogradely-labeled galanin neurons were observed anywhere in the brain, including a small number in the intraamygdalar bed nucleus. Together, these results suggest that stress following yohimbine may have induced galanin release from an afferent to central amygdala originating in the bed nucleus, or from local neurons in the intraamygdalar bed nucleus, but that anxiolytic effects exerted by galanin in this context of elevated noradrenergic activity were not the result of corelease from noradrenergic terminals innervating central amygdala.
Progress in Neuro-Psychopharmacology and Biological Psychiatry, 2005
The brain noradrenergic system is activated by acute stress. The post-synaptic effects of norepin... more The brain noradrenergic system is activated by acute stress. The post-synaptic effects of norepinephrine (NE), exerted at a cellular or neural circuit level, have been described as modulatory in nature, as NE facilitates responses evoked in target cells by both excitatory and inhibitory afferent input. Over the past few years, we have undertaken a series of studies to understand how these cellular modulatory effects of NE, elicited by acute stress, might translate into modulation of the behavioral-affective components of the whole-animal response to stress. Using microdialysis, we have demonstrated that acute immobilization stress activates NE release in a number of stress-related limbic forebrain target regions, such as the central and medial amygdala, lateral bed nucleus of the stria terminalis, medial prefrontal cortex, and lateral septum. Using microinjections of adrenergic antagonist drugs directly into these regions, we have shown that this stress-induced release of NE facilitates a number of anxiety-like behavioral responses that are mediated in these regions, including stress-induced reduction of open-arm exploration on the elevated plus-maze, stress-induced reduction of social interaction behavior, and activation of defensive burying behavior by contact with an electrified probe. Dysregulation of the brain noradrenergic system may be a factor in determining vulnerability to stress-related pathology, or in the interaction of genetic vulnerability and environmental sensitization. Compared to outbred Sprague-Dawley rats, we have shown that the modulatory effect of NE is deficient in Wistar-Kyoto rats, which also exhibit attenuated behavioral reactivity to acute stress, as well as increased vulnerability to stress-induced gastric ulcers and exaggerated activation of the hypothalamic-pituitary-adrenal (HPA) stress axis. Further, repeated exposure to mild intermittent cold stress resulted in a much greater sensitization of both the brain noradrenergic system and the HPA axis in Wistar-Kyoto rats compared to Sprague-Dawley rats. The recruitment of a robust noradrenergic facilitatory influence following repeated cold exposure in this previously deficient strain resulted in an aberrant HPA response, which may be illustrative of the kinds of neurobiological changes that may contribute to the development of stress-related neuropsychiatric disorders such as depression, post-traumatic stress disorder, or other anxiety disorders in predisposed or susceptible individuals. On the other side of the same issue, regulatory alterations in noradrenergic neurotransmission, or in the stress-modulatory functions of NE, may be important in the behavioral effects of chronic antidepressant drug treatment. We present recent preliminary results addressing the effects of chronic treatment with the selective NE reuptake inhibitor, desipramine, on acute behavioral reactivity to stress. A better understanding of the role of NE in adaptive responses to acute stress, the pathological consequences of prolonged, repeated or severe stress, and the mechanisms of action of drugs used to treat stress-related diseases, may contribute to the future development of more effective strategies for the treatment or even prevention of such disorders.
Plant Biology, 2007
Knowledge of developmental pathways for achieving differences in style and anther heights, in con... more Knowledge of developmental pathways for achieving differences in style and anther heights, in concert with those of ancillary features accompanied with data in regard to biomass investment to male and female function, provide an excellent opportunity for examining the developmental correlations between primary and ancillary floral traits so as to understand the evolution of heterostyly. The ontogenetic relationships between bud length and anther height and between bud length and style height, and between bud length versus bud width, anther length, and number of pollen grains per anther for long-styled (LS) and short-styled (SS) morphs of P. padifolia are described. We also described the ontogenetic biomass allocation to male and female function and to corolla with elongation of buds harvested at regular intervals. We observed an early termination of stylar growth in SS buds, whereas LS styles steadily increased in size. Morph differences for relative growth rates were significant for anther height, anther length, and pollen number but not for bud width. Bud width and anther length had a negative allometric relationship with bud elongation. The relationship between bud length and number of pollen grains per anther was positive and morph differences in pollen number were detected at later stages of development. An increase in corolla mass involved a disproportionate allocation to the female function in SS flowers and male allocation was similar for the two morphs over the course of development. Our results are consistent with theoretical and empirical data for distylous species with an approach herkogamous ancestor, and with the more general hypothesis of ontogenetic lability of heterostyly, in which morph differences in style and anther heights are achieved in various ways. Variations observed in sexual investment between floral morphs suggest differences in sex expression during flower development.
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Papers by Angelica Nahomi Hernandez