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EFECTO DEL MODELO “BAILE A LA SALUD”, SOBRE EL NIVEL DE ACTIVIDAD FíSICA, EL TIEMPO DEDICADO A MIRAR TELEVISIóN, LA FRECUENCIA DE CONSUMO DE ALIMENTOS Y ESTADíOS DE CAMBIO EN ADOLESCENTES MUJERES DE NOVENO A O
óscar Hernández Quesada
Revista en Ciencias del Movimiento Humano y Salud , 2010,
Abstract: The aim of this study was to determine the influence of a health promotion program called " Dance to Health" under the Transtheoretical Model as a basis for intervention, Latin dance (as a form of physical exercise) and talks regarding food and physical activity on the time spent watching television, frequency of food consumption, and stages of change. A total of 66 female adolescents participated in the study; 33 were in the experimental group and 33 in the control group. Participants were high school students aged between 15 and 17. The program lasted 12 weeks, with one 80-minute session per week. An initial pretest was administered, which yielded the amount of time devoted to performing physical activity (TPA), time spent watching television (TWT), food consumption rate (FCR), both healthy and unhealthy (ENCA 1997-98) and where the group was located within the stages of change (SC). At the end, a post-test was performed to verify the changes perceived after treatment. Statistical analysis: in order to determine the effect of the intervention on TPA, TWT, FCR, and SC, a two-way ANOVA was used and data was analyzed using the SPSS statistical package version 10. Results: regarding the TPA variable, the experimental group increased significantly in minutes, while the control group decreased the time used to perform physical activity (p <0.01). On the other hand, in the TWT variable, the experimental group significantly decreased compared to the control group, which increased the TWT (p <0.01). In the case of SC, the results were generally favorable for the experimental group, unlike the control group whose behavior showed negative trends. Finally, in the FCR variable no significant changes were observed in the average consumption of food groups analyzed. Conclusions: The program was able to create behavioral changes in the TPA, TWT, FCR and SC variables.
La semiótica musical como herramienta para el estudio social de la música
óscar Hernández Salgar
Cuadernos de Música, Artes Visuales y Artes Escénicas , 2012,
Abstract: El estudio reciente de la significación musical ha estado marcado por una brecha aparentemente insuperable entre las disciplinas que se centran en el texto musical como material sonoro (teoría de la música, musicología), aquellas que prefieren enfocarse en el sujeto oyente (ciencias cognitivas, psicología de la música) y aquellas que se centran en los discursos sociales sobre la música (etnomusicología, antropología, sociología). Este artículo plantea que en los avances de la semiótica musical de los últimos veinte a os es posible encontrar herramientas que permitan superar esta brecha. Con este fin, tras un recorrido por los conceptos más relevantes de este campo, se identifican tres grandes enfoques sobre la significación musical: el semiótico-hermenéutico, el cognitivo-corporal y el social-político. Esta clasificación sirve como base para presentar unas breves consideraciones metodológicas para abordar el estudio del significado musical desde distintos intereses académicos.
A simple proof of Abel's theorem on the lemniscate
Solanilla,Leonardo; Palacio,óscar; Hernández,Uriel;
Ingeniería y Ciencia , 2010,
Abstract: since abel's original paper of 1827, his remarkable theorem on the constructibility of the lemniscate splitting has been proven with the aid of elliptic functions. nowadays, rosen's proof of 1981 is considered definitive. he also makes use of (modern and more elaborate) class field theory.here we present a novel, short and simple proof of abel's theorem on the lemniscate and its converse. our only ingredients are the addition formulas of gauss lemniscatic functions and some basic facts of galois theory.
Demostración simple del teorema de Abel sobre la lemniscata A simple proof of Abel’s theorem on the lemniscate
Leonardo Solanilla,óscar Palacio,Uriel Hernández
Ingeniería y Ciencia , 2010,
Abstract: Desde la publicación original de Abel en 1827, su notable teorema sobre la constructibilidad de la división de la lemniscata se ha demostrado con ayuda de la teoría de las funciones elípticas. La prueba dada por Rosen en 1981 seconsidera, hoy por hoy, como definitiva. En ella se utiliza, además, la moderna e intrincada Class Field Theory. Aquí se presenta una demostración nueva, cortay simple del teorema de Abel para la lemniscata junto con su recíproco. Las únicas herramientas son las propiedades aditivas de las funciones lemniscáticas de Gauss y algunos elementos de teoría de Galois. Since Abel’s original paper of 1827, his remarkable theorem on the constructibilityof the lemniscate splitting has been proven with the aid of Elliptic Functions. Nowadays, Rosen’s proof of 1981 is considered definitive. He also makesuse of (modern and more elaborate) Class Field Theory. Here we present anovel, short and simple proof of Abel’s Theorem on the lemniscate and itsconverse. Our only ingredients are the addition formulas of Gauss lemniscaticfunctions and some basic facts of Galois Theory.
El tama?o y la composición de las lipoproteínas de alta densidad (HDL) se modifican en la rata por una dieta suplementada con aguacate <> (Persea americana Miller)
Pérez Méndez, óscar;García Hernández, Lizbeth;
Archivos de cardiología de México , 2007,
Abstract: purpose: to determine the effects of dietary avocado on hdl structure and their associated enzyme, paraoxonase 1 (pon1). methods: fifteen wistar male rats received avocado as part of their daily meal (5 g by 17.5 g chow diet), keeping the caloric intake similar to the control group (n = 15) that received their usual chow diet. after 5 weeks, hdl were isolated by sequential ultracentrifugation and their size and chemical composition were analyzed. pon1 was determined in serum spectrophotometrically using phenylacetate as substrate. results: rats that received avocado had about 27% lower triglycerides plasma levels whereas their hdl-cholesterol was 17% higher as compared to control group. the mean hdl stokes diameter was significantly lower in avocado group (11.71 ± 0.8 vs 12.27 ± 0.26 nm, in control group, p < 0.05). the hdl size decrease was associated to a lower content of protein, particularly of apo al, with a concomitant higher proportion of phospholipids in hdl isolated from avocado group. hdl structural modifications induced by avocado were not related to modifications of lcat and pltp activities, but occurred in parallel with higher serum levels of pon1 activity when compared to the controls (57.4 ± 8.9 vs 43.0 ± 5.6 μmol/min/ml serum, p < 0.05). conclusions: the inclusion of avocado in the diet decreased plasma triglycerides, increased hdl-cholesterol plasma levels and modified hdl structure. the latter effect may enhance the antiatherogenic properties of hdl since pon1 activity also increased as a consequence of avocado.
El Optimismo como Factor Protector de la Depresión Infantil y Adolescente
Sánchez Hernández,óscar; Méndez Carrillo,Francisco Xavier;
Clínica y Salud , 2009,
Abstract: this paper shows that an optimistic explanatory style consisting of taking positive situations as permanent and global attributions and negative situations as temporary and specific attributions is related significantly to lower depressive symptoms. implications of these results are discussed in the light of the reformulated model of learned helplessness (abramson, seligman y teasdale, 1978) and the hopelessness theory (abramson, metalsky and alloy, 1989). the paper also suggests taking into account new constructs that can be influential, such as explanatory flexibility, self-perceived control over stressful situations and the importance given to them. girls show a more optimistic explanatory style in preadolescence and participants older than 10 score higher in depression.
Fertirriego en el rendimiento de híbridos de tomate producidos en invernadero
Quesada-Roldán,Gustavo; Bertsch-Hernández,Floria;
Agronomía Mesoamericana , 2012,
Abstract: the objective of this work was to evaluate the response of tomato hybrids to three fertilization-watering programs based on recommendations of dose compiled from the literature (lit), curves of absorption (ca), and adjustments of information previously analized (aju). from october 2008 to march 2009, two tomato hybrids (fb-17 and drd-8108) were grown in the greenhouse of the fabio baudrit moreno agricultural research station in alajuela, costa rica. no significant statistical differences were found in the commercial performance in none of the three fertilization treatments; significant differences among the hybrids were observed. the hybrid drd-8108 surpassed fb-17. fb-17 hybrid yield for treatment lit was 69.3 t/ha and 5.87 kg/plant; in the ca treatment was 75.5 t/ha and 6.39 kg/plant; and in the aju treatment 76.4 t/ha and 6.62 kg/plant, respectively. for the drd-8108 hybrid, the lit treatment yield was 85.4 t/ha and 8.55 kg/plant; in the ca treatment was 86.7 t/ha and 7.45 kg/plant; finally in the aju treatment yield was 83.9 t/ha and 7.38 kg/plant. the high internal greenhouse temperature was the main limiting factor that constrained yield.
FERTIRRIEGO EN EL RENDIMIENTO DE HíBRIDOS DE TOMATE PRODUCIDOS EN INVERNADERO
Gustavo Quesada-Roldán,Floria Bertsch-Hernández
Agronomía Mesoamericana , 2012,
Abstract: Fertirriego en el rendimiento de híbridos de tomate producidos en invernadero. El objetivo del presente trabajo fue evaluar el efecto de diferentes programas de fertirriego, sobre la producción de híbridos de tomate en invernadero. De octubre 2008 a marzo 2009, se sembraron dos híbridos de tomate (FB-17 y DRD-8108) en invernadero en la Estación Experimental Agrícola Fabio Baudrit Moreno en Alajuela, Costa Rica, para evaluar su respuesta a estrategias de fertirriego, a partir de recomendaciones de dosis recopiladas de la literatura (LIT), curvas de absorción (CA) y producto del ajuste de la información aportada por los tratamientos previos (AJU). No se encontraron diferencias estadísticas signifi cativas en el rendimiento comercial en ninguno de los tres tratamientos de fertilización; únicamente se presentaron diferencias entre los híbridos. El híbrido DRD-8108 superó al FB-17. El híbrido FB-17 con el tratamiento LIT rindió 69,3 t/ha y 5,87 kg/planta; con CA obtuvo 75,5 t/ha y 6,39 kg/planta; y AJU alcanzó 76,4 t/ha y 6,62 kg/planta. Para el DRD-8108 con el tratamiento LIT rindió 85,4 t/ha y 8,55 kg/ planta; CA obtuvo 86,7 t/ha y 7,45 kg/planta; y AJU alcanzó 83,9 t/ha y 7,38 kg/planta. La alta temperatura al interior del invernadero, fue el principal factor limitante del rendimiento alcanzado.
Hacia una nueva cultura del agua en México: organización indígena y campesina. El caso de la presa Villa Victoria
María Estela Orozco Hernández,Amaia Quesada Diez
Ciencia Ergo Sum , 2010,
Abstract: El objetivo del presente artículo es describir la insostenibilidad en la gestión del agua en México y la respuesta de los movimientos sociales indígenas en defensa del agua y los recursos naturales. La conciencia de estos grupos indígenas, sus reivindicaciones y sus propuestas de cambio mediante planes de desarrollo rural sostenibles realizados y gestionados por ellos mismos, suponen un acercamiento a la visión de futuro de La Nueva Cultura del Agua. El estudio de caso se ha realizado en la Presa Villa Victoria y en la Región Mazahua colindante a dicho cuerpo de agua. Se analizó información cartográfica, estadística y documental, así como la obtenida a través del diálogo con informantes de la zona en estudio.
Síndrome 48, XXXY: presentación de un caso
Chiong Quesada,Carmen María; Martín Cuesta,Nelson H; Hernández Hernández,Roberto; Chiong Quesada,Martín;
Revista Archivo M??dico de Camag??ey , 2010,
Abstract: a 21 years old masculine white patient with facial dysmorphia, hypogenitalism, skeletal anomalies and severe mental delay was presented. for the diagnosis of this affection the clinical method through the comparative or pattern technique was applied. the chromosomal study was carried out in peripheral blood, conventional techniques were used being confirmed the diagnosis of the 48, xxxy syndrome. it is important to take into account the clinical manifestations before mentioned in order to establish early diagnosis, rehabilitate these patients physically - psychically and socially and to offer a genetic counselling to the family.
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