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Search Results: 1 - 10 of 400997 matches for " M. Santander "
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El acceso de los ciudadanos a las noticias de la televisión: la construcción de un tercero discursivo
Santander M.,Pedro;
Literatura y lingüística , 2004, DOI: 10.4067/S0716-58112004001500012
Abstract: the next work deals with the representation that is made of the citizens without social power in chilean television news, from the perspective of the discourse analysis. it is analyzed how they access linguistically to the news discourse. unlike what other studies claim, it is stated that the access of the citizens to television is frequent. however, it is often associated to controversial and tragic situations; besides, strategies that turn them into second-class informative sources are linguistically predominant: is not talked to them, but about them
Acceso y poder discursivo en las noticias de la televisión chilena
Santander M,Pedro;
Revista signos , 2002, DOI: 10.4067/S0718-09342002005100016
Abstract: the following article examines from the perspective of critical discourse analysis (cda) the relation among access, discourse and power in chilean television newscasts. the aim is to establish how the language used by journalists determines the way sources access to the news and how they are represented. therefore, we analyze comparatively the way the same news was diffused during november 2000 in the most important television newscasts.
El acceso de los ciudadanos a las noticias de la televisión: la construcción de un tercero discursivo
Pedro Santander M.
Literatura y lingüística , 2004,
Abstract: El siguiente trabajo aborda, desde la perspectiva del Análisis del Discurso, la representación que se realiza de los ciudadanos sin poder social en las noticias de televisión chilenas. En ese marco, se analiza cómo ellos acceden lingüísticamente al discurso informativo. A diferencia de lo que otros estudios sostienen, se afirma que el acceso de los ciudadanos a la televisión es frecuente, sin embargo, suele estar asociado a situaciones conflictivas y trágicas; además, lingüísticamente predominan estrategias que los convierten en fuentes informativas de segunda clase: no se habla con ellos, sino de ellos The next work deals with the representation that is made of the citizens without social power in Chilean television news, from the perspective of the Discourse Analysis. It is analyzed how they access linguistically to the news discourse. Unlike what other studies claim, it is stated that the access of the citizens to television is frequent. However, it is often associated to controversial and tragic situations; besides, strategies that turn them into second-class informative sources are linguistically predominant: is not talked to them, but about them
Acceso y poder discursivo en las noticias de la televisión chilena
Pedro Santander M
Revista Signos , 2002,
Abstract: El presente artículo aborda, desde la perspectiva del Análisis Crítico del Discurso (ACD), la relación entre acceso, discurso y poder en un corpus de noticias de la televisión chilena. El objetivo es establecer qué papel juega el lenguaje empleado por los periodistas para determinar la manera en que las fuentes informativas acceden a los noticiarios y cómo son representadas. Para esos efectos, se analizó comparativamente una misma noticia que fue difundida por los principales canales de televisión en noviembre de 2000. The following article examines from the perspective of Critical Discourse Analysis (CDA) the relation among access, discourse and power in Chilean television newscasts. The aim is to establish how the language used by journalists determines the way sources access to the news and how they are represented. Therefore, we analyze comparatively the way the same news was diffused during November 2000 in the most important television newscasts.
The general solution of the real $Z_2^{\otimes N}$ graded contractions of $so(N+1)$
F. J. Herranz,M. Santander
Physics , 1996, DOI: 10.1088/0305-4470/29/20/018
Abstract: The general solution of the graded contraction equations for a $\zz_2^{\otimes N}$ grading of the real compact simple Lie algebra $so(N+1)$ is presented in an explicit way. It turns out to depend on $2^N-1$ independent real parameters. The structure of the general graded contractions is displayed for the low dimensional cases, and kinematical algebras are shown to appear straightforwardly. The geometrical (or physical) meaning of the contraction parameters as curvatures is also analysed; in particular, for kinematical algebras these curvatures are directly linked to geometrical properties of possible homogeneous space-times.
Searching for TeV gamma-ray emission associated with IceCube high-energy neutrinos using VERITAS
M. Santander,for the VERITAS,IceCube Collaborations
Physics , 2015,
Abstract: A clue to finding the long-sought sources of cosmic rays is the recent observation of an astrophysical flux of high-energy neutrinos by the IceCube detector, since these possibly originate in hadronic interactions at cosmic-ray accelerators. While the neutrino sky map shows no significant indication of point sources so far, it is possible to utilize the sensitivity of Imaging Air Cherenkov Telescope (IACT) arrays, such as VERITAS, to search for hadronic gamma-ray emission from the neutrino directions. Over the last 2 years, the positions of neutrino events detected by IceCube have been observed using the VERITAS array. Observations have been limited to muon neutrino events, since their typical angular reconstruction uncertainty is below 1 degree, smaller than the 3.5-degree diameter of the VERITAS field of view. The location of VERITAS further constrains the neutrino event positions that can be observed to those located in the northern sky, or at moderate southern declinations. The list of observed positions was selected from published results and a set of high-energy muon tracks provided by IceCube. We present the current status and some preliminary results from this program.
Estudio comparativo de la próstata en perros mediante ecografía transrectal y transabdominal
Thibaut,J; Santander,J; Mieres,M;
Archivos de medicina veterinaria , 2009, DOI: 10.4067/S0301-732X2009000100008
Abstract: the purpose of this study was to compare the use of transrectal and transabdominal ultrasonographic techniques for the examination of the canine prostate gland. twenty healthy male dogs, from 1.5 to 10 years old, weighing between 15 and 35 kg were used. they were anesthetised intravenously with xylazine and ketamine. the transrectal ultrasound was performed using a 7.5 mhz linear transducer and the transabdominal ultrasound with a 7.5 mhz sector transducer. the parameters compared with both techniques were: detection of the prostate gland, its length, width echogenicity and echotexture. the transrectal technique allowed the detection of the prostate gland in all cases. the transabdominal technique achieved 4 complete images, 11 incomplete images and in 5 cases the prostatic gland was not detected at all. significant differences in prostatic length and width were found comparing both techniques. the gland was longer with the transrectal technique and wider with the transabdominal method. there were no differences between both techniques when comparing the echogenicity and echotexture. however the obtained image detail was better with the transrectal technique. it can be concluded that the transrectal technique gives better information regarding prostatic size than the transabdominal technique. the transrectal technique is rarely used, because a rectal probe and general anesthesia are required. in dogs, both techniques are important and complementary in order to determine prostatic image.
ACCESO VASCULAR PERIFERICO EN NEONATOS DE CUIDADO INTENSIVO: EXPERIENCIA DE UN HOSPITAL PUBLICO
BARRIA P,R. MAURICIO; SANTANDER M,GEMA;
Ciencia y enfermería , 2006, DOI: 10.4067/S0717-95532006000200005
Abstract: in the context of a public hospital, a prospective study was conducted to compare two methods of peripheral venous catheterization used in neonatal intensive care units. type and incidence of complications and venipunction practices were analyzed. 828 catheters were used in 75 neonates (595 vialon? and 233 butterfly steel needle). the mean life span of vialon? was longer than butterfly. in neonates less than 1500g, insyte? remained functional longer than butterfly, but this required less time and attempts to be installed. the main reason to removal both types of catheters were extravasations (75%). there were no differences in phlebitis incidence but tissue necrosis incidence was higher in butterfly (rr: 17,8; ic95 2,2 _ 144,5). we recommend the use of vialon?, even though the utilization time is longer than 72 hours
Cateterismo venoso central de inserción periférica en recién nacidos de cuidado intensivo
Barría P,Mauricio; Santander M,Gema;
Revista chilena de pediatría , 2006, DOI: 10.4067/S0370-41062006000200003
Abstract: objective: to evaluate the use of peripherically-inserted central venous catheter (picc) in newborns of intensive care units. patients and methods: 46 catheters inserted in 40 neonates were evaluated prospectively analyzing 4 variables: number of venipuncture attempts, time of installation, reasons for removal and complications. results: 49% were settled in the first attempt and 69,5% in antecubital veins, locating 63% in superior vena cava. the mean venipuncture attempts was 2,1, being significantly lower in low birth weight neonates (< 1 500 g = 1,7 ± 1,1; > 1 500 g = 2,5 ± 1,5; p = 0,045). the average time of installation was 20 minutes for very low birth weight newborns and 25 for the greater ones. the duration period was similar. 50% were retired by the end of intravenous therapy, 19,6% due to occlusion and 8,7% because of phlebitis. conclusions: picc constitute a first line alternative for very low birth weight newborns where installation is easier, being a safe and effective intervention
Cateterismo venoso central de inserción periférica en recién nacidos de cuidado intensivo Peripherically-inserted Central Venous Catheter in Newborn Intensive Care Unit
Mauricio Barría P,Gema Santander M
Revista chilena de pediatría , 2006,
Abstract: Propósito: Evaluar la utilización del catéter venoso central de inserción periférica (CCIP) en neonatos de cuidado intensivo. Métodos: Se estudió prospectivamente 46 catéteres instalados en 40 neonatos analizándose las variables intentos de venopunción, tiempo de instalación, motivo de retiro y complicaciones. Resultados: Se instaló 49% en primera venopunción y 69,5% en venas antecubitales, situándose 63% en Vena Cava Superior. El promedio global de intentos de venopunción fue 2,1 siendo significativamente inferior en menores de 1500 gramos (£1 500 g = 1,7 ± 1,1; > 1 500 g = 2,5 ± 1,5; p = 0,045). La mediana de tiempo de instalación fue 20 minutos para menores de 1 500 gramos y 25 para los mayores. La mediana de permanencia fue similar. Se retiró por término de terapia intravenosa el 50%, 19,6% por oclusión y 8,7% por flebitis. Conclusiones: Los CCIP constituyen una alternativa de primera elección para neonatos más peque os donde pareciera ser más fácil su instalación, siendo una intervención segura y efectiva Objective: To evaluate the use of peripherically-inserted central venous catheter (PICC) in newborns of intensive care units. Patients and Methods: 46 catheters inserted in 40 neonates were evaluated prospectively analyzing 4 variables: number of venipuncture attempts, time of installation, reasons for removal and complications. Results: 49% were settled in the first attempt and 69,5% in antecubital veins, locating 63% in superior vena cava. The mean venipuncture attempts was 2,1, being significantly lower in low birth weight neonates (< 1 500 g = 1,7 ± 1,1; > 1 500 g = 2,5 ± 1,5; p = 0,045). The average time of installation was 20 minutes for very low birth weight newborns and 25 for the greater ones. The duration period was similar. 50% were retired by the end of intravenous therapy, 19,6% due to occlusion and 8,7% because of phlebitis. Conclusions: PICC constitute a first line alternative for very low birth weight newborns where installation is easier, being a safe and effective intervention
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