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Search Results: 1 - 10 of 486015 matches for " César Sandoval S "
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Efecto de la edad del rebrote y tasa de crecimiento del mataratón (Gliricidia sepium) sobre su bromatología y minerales
Araque,César; Arrieta,Guillermo; Sánchez,Alexander; Sandoval,Espartaco;
Zootecnia Tropical , 2002,
Abstract: to determine the nutritional value and growth rate of mataraton (gliricidia sepium) as feedstuff for dual purpose cattle, a trial was carried out in the area of tres islas, garcia de hevia county, tachira state, venezuela, characterized by a mean temperature of 26.9 °c, average annual rainfall 2,651 mm, at an altitude of 127 mase and the climate is classified as tropical humid forest type ( bh-t ). a total of 40 plants that were usep as a paddock living fence, were trimmed every 30 days at the trunk top level, where 3 compound samples were monthly taken random y for a year, to determine dry matter, lipid, ash and, protein content and some minerals. before that, branches were measured from their tips to the base determine its growth rate. results showed that, plant maturation level increased (p<0.05) the content of dry matter and lipids from 10.33 to 13.79%, and 1.88 to 4.12%, respectively. meanwhile protein and ashes content decreased (p<0.05) from 26.52 to 21.60%, and 11.06 to 6.03%, respectively. regarving to mineral content, p, k, fe, and zn decreased (p<0.05) from 0.49 to 0.15%, 3.20 to 0.91%, 263.60 to 152.00 ppm, and 59.30 to 31.04 ppm, respectively. ca, mg and mn values increased from 0.19 to 1.39%, 0.20 to 0.40% and 16.3 to 62.0%, respectively. finally, monthly growth rate showed a mean of 39.83 cm. these results showed that besides its high nutritional value, mataraton has a vigorous and fast growing pattern.
MONITOREO Y CONTROL DE TEMPERATURA DE UN ESTANQUE DE AGUA ENTRE CHILE Y ESPA?A USANDO REDES DE ALTA VELOCIDAD
San Martín S,César; Torres V,Flavio; Barrientos S,Rodrigo; Sandoval D,Magaly;
Revista Facultad de Ingeniería - Universidad de Tarapacá , 2003, DOI: 10.4067/S0718-13372003000100006
Abstract: in this work, the implementation of a real-time laboratory for educational purposes and collaborative research in the area of automatic control is presented. the infrastructure of data network used is high-speed network (internet2 in america). here are the principal considerations of its development, they are: the procedures for monitoring network link, installation of applications and start up operation. the process used is the control of temperature of a water reservoir. the final application shows that a suitable evaluation of the network link, a good characterization of the plant and the use of suitable communication and video conference protocols, allow development of systems with a significant contribution to education and to collaborative work.
MONITOREO Y CONTROL DE TEMPERATURA DE UN ESTANQUE DE AGUA ENTRE CHILE Y ESPA A USANDO REDES DE ALTA VELOCIDAD
César San Martín S,Flavio Torres V,Rodrigo Barrientos S,Magaly Sandoval D
Revista Facultad de Ingeniería - Universidad de Tarapacá , 2003,
Abstract: En este trabajo se presenta la implementación de un laboratorio en tiempo real para fines educacionales e investigación colaborativa en el área de Control Automático. La infraestructura de red de datos utilizada es Internet de alta velocidad (Internet2 en América). Se presentan las principales consideraciones de su desarrollo, como son: los procedimientos de verificación del enlace de red, procedimiento de instalación de aplicaciones y puesta en marcha. El proceso utilizado es el control de temperatura de un estanque de agua. La aplicación final muestra que una adecuada evaluación del enlace de red, una buena caracterización de la planta y el uso de adecuados protocolos de comunicación y videoconferencia, permiten desarrollar sistemas con un aporte significativo a la educación y al trabajo colaborativo. In this work, the implementation of a real-time laboratory for educational purposes and collaborative research in the area of Automatic Control is presented. The infrastructure of data network used is High-Speed Network (Internet2 in America). Here are the principal considerations of its development, they are: the procedures for monitoring network link, installation of applications and start up operation. The process used is the control of temperature of a water reservoir. The final application shows that a suitable evaluation of the network link, a good characterization of the plant and the use of suitable communication and video conference protocols, allow development of systems with a significant contribution to education and to collaborative work.
SUSPENSIóN TRANSVAGINAL ALTA A LIGAMENTOS UTEROSACROS PARA EL TRATAMIENTO DE DEFECTOS APICALES (STALUS): DESCRIPCIóN DE LA TéCNICA Y RESULTADOS ANATóMICOS A MEDIANO PLAZO
Jorge Lecannelier A,César Sandoval S,Michel Naser N,Valentín Manríquez G
Revista Chilena de Obstetricia y Ginecología , 2008,
Abstract: Objetivos: Describir una técnica quirúrgica, novedosa en el medio nacional, de abordaje vaginal, para el tratamiento del prolapso apical: la suspensión transvaginal alta a ligamentos úterosacros (STALUS). Método: Estudio descriptivo longitudinal, de 57 pacientes con defectos apicales, a los cuales se les realizó esa técnica entre Diciembre de 2002 y Octubre 2005. Se realizó estadística descriptiva y test t (2 muestras) para análisis de pronóstico anatómico (POP-Q). Para análisis de potenciales factores pronósticos se utilizó ANOVA, regresión lineal y logística. Resultados: El tiempo operatorio promedio fue de 151 minutos. El resultado anatómico (POP-Q), pre y postoperatorio, resultó favorable y estadísticamente significativo, en los nueve puntos evaluados, 49 de las 54 pacientes fueron seguidas en promedio durante 15 meses. En el compartimiento apical (punto C) obtuvimos curación del 89% y no hubo fracasos. En la pared anterior, 22% de las pacientes recidivaron. En cuanto a las complicaciones, se produjo una fístula ureterovaginal. Conclusiones: Tomando las precauciones necesarias, es una técnica segura y reproducible, con buenas tasa de curación. Asegurar la indemnidad del uréter, siempre será una obligación. La recidiva en pared anterior, aunque sea asintomática, resulta ser extremadamente alta, lo que nos obliga a pensar en nuevas técnicas de abordaje de este compartimiento. Objective: To describe a novel surgery technique in the national ground, of vaginal approach for the treat-ment of apical prolapse: the transvaginal high suspensión to the uterosacral ligaments (STALUS). Method: It is a longitudinal descriptive study that included 57 patients with apical support defects, in which this technique was performed between December 2002 and October 2005. Descriptive statistics and t test were per-formed for the anatomical outcome (POP-Q). For the potential prognosis factors, ANOVA, lineal regression and logistic, were used. Results: The average surgery time was 151 minutes. The anatomical result (POP-Q), before and after surgery, was favourable and significant in the nine points evaluated. 49 of 54 patients were followed for 15 months in average. In the apical compartment (C point) we got an 89% of cure and there were no failure. In the anterior wall, instead, 22% of our patients recurred. About complications, there was an ureterovaginal fistula. Conclusions: If all precautions are taking, there is a secure and reproducible technique, with good cure rate. To secure the uréter it is always an obligation. The recurrence in the anterior wall, even been asy
NEUROMODULACIóN EN PATOLOGíAS DE PISO PéLVICO
Valentín Manríquez G,César Sandoval S,Jorge Lecannelier A,Michel Naser N
Revista Chilena de Obstetricia y Ginecología , 2010,
Abstract: A través de la historia la neuromodulación ha demostrado ser una alternativa de tratamiento eficaz en el manejo de diversas disfunciones del piso pélvico. Distintas técnicas intentan conseguir un objetivo común, sin embargo, el éxito terapéutico es disímil dependiendo de la severidad y tipo de patología. Describimos los aspectos clínicos y operacionales relacionados con las diversas técnicas, así como los mecanismos de acción propuestos para la neuromodulación. Through hystory, neuromodulation have proved to be an effective alternative of management of pelvic floor dysfunctions. Several technical alternatives try to reach a same therapeutic objetive, however, depending on the severity and type of symptom their succes differ. We describe the clinical and technical aspects related to those different technics so as the mechanisms of action that are propose for the neuromodulation.
La Investigación orientada en el nivel superior para la ense anza del campo eléctrico
M. Sandoval,César Mora
Latin-American Journal of Physics Education , 2011,
Abstract: We show a work using oriented research as teaching strategy to electric field concept in freshmen. The results showsthat (in experimental group) pre-conceptual models among students of high and low academic level tend to be very similar in activities that involve conceptual reasoning; however on activities more abstract the difference among them are remark. We found also that gain in experimental group was 11% compared with 3.8% of control group.
Modelos erróneos sobre la comprensión del campo eléctrico en estudiantes universitarios
M. Sandoval,César Mora
Latin-American Journal of Physics Education , 2009,
Abstract: We show results of research about misconceptions, in university students, about electric field concepts and itsinfluence among electric charges and electric energy conservation. Exhibit a didactic proposal based on history sciencein order to improve this topic in those students; this proposed rest in a technical socio-constructivist called Jigsaw,primarily history of charges concept and history of lines force. We show some advantage over traditional teaching, wecan observe a better attitude among students in experimental group at moment of solve problem and study history text,so there is little grow in score of post test compared with control group.
NEUROMODULACIóN EN PATOLOGíAS DE PISO PéLVICO
Manríquez G,Valentín; Sandoval S,César; Lecannelier A,Jorge; Naser N,Michel; Guzmán R,Rodrigo; Valdevenito S,Raúl; Abedrapo M,Mario;
Revista chilena de obstetricia y ginecología , 2010, DOI: 10.4067/S0717-75262010000100010
Abstract: through hystory, neuromodulation have proved to be an effective alternative of management of pelvic floor dysfunctions. several technical alternatives try to reach a same therapeutic objetive, however, depending on the severity and type of symptom their succes differ. we describe the clinical and technical aspects related to those different technics so as the mechanisms of action that are propose for the neuromodulation.
SUSPENSIóN TRANSVAGINAL ALTA A LIGAMENTOS UTEROSACROS PARA EL TRATAMIENTO DE DEFECTOS APICALES (STALUS): DESCRIPCIóN DE LA TéCNICA Y RESULTADOS ANATóMICOS A MEDIANO PLAZO
Lecannelier A,Jorge; Sandoval S,César; Naser N,Michel; Manríquez G,Valentín; Guzmán R,Rodrigo; Valdebenito S,Raúl; Cavada C,Gabriel; Aguilera M,Amalia; Rao,XI;
Revista chilena de obstetricia y ginecología , 2008, DOI: 10.4067/S0717-75262008000300002
Abstract: objective: to describe a novel surgery technique in the national ground, of vaginal approach for the treat-ment of apical prolapse: the transvaginal high suspensión to the uterosacral ligaments (stalus). method: it is a longitudinal descriptive study that included 57 patients with apical support defects, in which this technique was performed between december 2002 and october 2005. descriptive statistics and t test were per-formed for the anatomical outcome (pop-q). for the potential prognosis factors, anova, lineal regression and logistic, were used. results: the average surgery time was 151 minutes. the anatomical result (pop-q), before and after surgery, was favourable and significant in the nine points evaluated. 49 of 54 patients were followed for 15 months in average. in the apical compartment (c point) we got an 89% of cure and there were no failure. in the anterior wall, instead, 22% of our patients recurred. about complications, there was an ureterovaginal fistula. conclusions: if all precautions are taking, there is a secure and reproducible technique, with good cure rate. to secure the uréter it is always an obligation. the recurrence in the anterior wall, even been asymptomatic, is too high, that make us think in new techniques in order to manage this compartment.
PERCEPCIONES, ACTITUDES Y CONDUCTAS DE MéDICOS GINECO-OBSTETRAS, RESPECTO AL USO ACTUAL DE TERAPIA DE REEMPLAZO HORMONAL
Pizarro O,Ernesto; Villarroel C,Mauricio; Fertilio T,Oscar; Gadán H,Ana; González V,Marcelo; Ibarra P,Agustín; Parra A,Manuel; Riveros K,Rodrigo; Sandoval S,César; Silva R,Patricio; Valverde P,Víctor;
Revista chilena de obstetricia y ginecología , 2008, DOI: 10.4067/S0717-75262008000100003
Abstract: in orderto set a diagnosis about the use of hormonal replacement therapy (hrt) in peri and postmenopau-sal women by the obstetricians and gynecologists members of our staff, we did a survey that was answered by 97.6% of them. questions about the future patients desire related to use of hrt or use of natural or alternative medicines were included. there were also questions related to the "risk-benefit" relationship on the use of hrt from an overall point of view as well as from a cardiovascular point of view. the preference of medical doctors (md) on choice of hormone type in hrt use, in respect to the administration, were also asked. among others, questions were asked in order to know md opinions on the relationship with breast cáncer, the changes on acceptability use after the whi study, reasons for the treatment discontinuation, the importance of women's age and the cost of pharmaceuticals producís on hrt use. conclusions: are focused on a need of a solid educational program on use of hrt addressed to gynecologists, as well as to general practitioners, cardiologists, oncologists and others related. educational programs are also quite beneficial to future users as well as women that are currently under treatment. in the absence of conclusive information available at the present moment, we advise that patients considering hrt should seek the coun-sel of medical teams whose specialties include menopause
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