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Search Results: 1 - 10 of 27651 matches for " Yolanda González "
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Efecto del agua caliente en la germinación de las semillas de Leucaena leucocephala cv. Perú
González,Yolanda; Mendoza,F;
Pastos y Forrajes , 2008,
Abstract: in a simple classification design the effect of the pregerminative treatment with water at 80oc for two minutes, on the germination of seeds from leucaena leucocephala cv. peru stored under cold-storage room and ambient conditions, for seven years, was studied. the presence of moderate dormancy was proven, with a germination percentage of 67,3% in the newly harvested seed, which was lower than the germination potential shown through their high viability (98,2%). under controlled and ambient conditions germination showed highly significant differences for the storage months (p<0,001) and the highest values without applying pregerminative treatment were achieved at 12, 42 and 48 months (77,6; 71,8 and 75,7%) and at 18 months (81,8%), respectively. the application of water at 80oc for two minutes produced significant increases (p<0,001) in germination with regards to the untreated seed and under controlled conditions it was higher at 12, 24 and 48 months (98,6; 99,6 and 98,5%) and under ambient conditions at 6, 12 and 18 months (96,2; 97,7 and 97,7%). it is concluded that the newly harvested seeds from l. leucocephala cv. peru show around 30% dormancy and can increase their germination by applying water to them at 80oc for two minutes.
La documentación de la Unión Europea : concepto y clasificación
Martín González, Yolanda
BiD : Textos Universitaris de Biblioteconomia i Documentació , 2001,
Abstract: Es presenta un examen de la producció bibliogràfica i documental de la Unió Europea (UE). Per fer-ho, es delimita, en primer lloc, el concepte 'documentació de la Unió Europea' amb un repàs analític i crític d'algunes definicions. A continuació, s'estableix una classificació de la producció documental de les comunitats europees tenint en compte diversos criteris (autor, destinatari, origen, etc.) i desenvolupant-hi detalladament el de tipus de document que estableix, d'una banda, la documentació legislativa i jurisprudencial i, de l'altra, la documentació preparatòria i complementària.
La documentació de la Unió Europea : concepte i classificació
Martín González, Yolanda
BiD : Textos Universitaris de Biblioteconomia i Documentació , 2001,
Abstract: Es presenta un examen de la producció bibliogràfica i documental de la Unió Europea (UE). Per fer-ho, es delimita, en primer lloc, el concepte 'documentació de la Unió Europea' amb un repàs analític i crític d'algunes definicions. A continuació, s'estableix una classificació de la producció documental de les comunitats europees tenint en compte diversos criteris (autor, destinatari, origen, etc.) i desenvolupant-hi detalladament el de tipus de document que estableix, d'una banda, la documentació legislativa i jurisprudencial i, de l'altra, la documentació preparatòria i complementària.
Efecto del agua caliente en la germinación de las semillas de Leucaena leucocephala cv. Perú Effect of hot water on the germination of seeds from Leucaena leucocephala cv. Peru
Yolanda González,F Mendoza
Pastos y Forrajes , 2008,
Abstract: En un dise o de clasificación simple se estudió el efecto del tratamiento pregerminativo con agua a 80oC por dos minutos, en la germinación de las semillas de Leucaena leucocephala cv. Perú almacenadas al frío y al ambiente, durante siete a os. Se demostró la presencia de dormancia moderada, con un porcentaje de germinación de 67,3% en la semilla recién cosechada, que fue inferior a la potencialidad germinativa mostrada a través de su alta viabilidad (98,2%). En condiciones controladas y al ambiente la germinación presentó diferencias altamente significativas para los meses de almacenamiento (P<0,001) y los valores superiores sin aplicar tratamiento pregerminativo se lograron a los 12, 42 y 48 meses (77,6; 71,8 y 75,7%) y a los 18 meses (81,8%), respectivamente. La aplicación de agua a 80°C por dos minutos produjo incrementos significativos (P<0,001) en la germinación con respecto a la semilla sin tratar; en condiciones controladas fue superior a los 12, 24 y 48 meses (98,6; 99,6 y 98,5%) y al ambiente a los 6, 12 y 18 meses (96,2; 97,7 y 97,7%). Se concluye que las semillas de L. leucocephala cv. Perú recién cosechadas presentan alrededor de 30% de dormancia y que pueden incrementar su germinación aplicándoles agua a 80°C por dos minutos In a simple classification design the effect of the pregerminative treatment with water at 80oC for two minutes, on the germination of seeds from Leucaena leucocephala cv. Peru stored under cold-storage room and ambient conditions, for seven years, was studied. The presence of moderate dormancy was proven, with a germination percentage of 67,3% in the newly harvested seed, which was lower than the germination potential shown through their high viability (98,2%). Under controlled and ambient conditions germination showed highly significant differences for the storage months (P<0,001) and the highest values without applying pregerminative treatment were achieved at 12, 42 and 48 months (77,6; 71,8 and 75,7%) and at 18 months (81,8%), respectively. The application of water at 80oC for two minutes produced significant increases (P<0,001) in germination with regards to the untreated seed and under controlled conditions it was higher at 12, 24 and 48 months (98,6; 99,6 and 98,5%) and under ambient conditions at 6, 12 and 18 months (96,2; 97,7 and 97,7%). It is concluded that the newly harvested seeds from L. leucocephala cv. Peru show around 30% dormancy and can increase their germination by applying water to them at 80oC for two minutes.
DIAGNóSTICO DEL GOBIERNO ELECTRóNICO EN LA ALCALDíA DEL ESTADO BARINAS
Nairo González,Yolanda Reinoza
CONHISREMI , 2011,
Abstract: It is presented an analysis of the e-government of the mayoralty of Barinas. The research is descriptive, relies on e-government model proposed by Esteves (2005), which consists of measuring the existence on the website of the institutions public of the following attributes: Presence, Information urban, Interaction, Transaction and Transformation or electronic democracy. It was analyzed the institution's website, using a checklist to verify the existence of a set of attributes for each of the levels of e-government. Additionally, it was used direct observation and the SWOT matrix to determine the strengths, opportunities, threats, weaknesses in the mayor of Barinas state for the implementation of Electronic Government. It was found sufficient technological infrastructure, staff with computer skills, and availability of adequate computer equipment with Internet accessibility. In conducting the analysis, we conclude that e-government as mayor of Barinas is located in the third phase, called interaction, and nothing is offered at the level of transaction and transformation. Se presenta un diagnóstico del Gobierno electrónico en la Alcaldía del estado Barinas, El tipo de investigación es descriptivo; se apoya en el modelo de gobierno electrónico propuesto por Esteves (2005), el cual consiste en medir la existencia en el sitio Web de las instituciones públicas de los atributos Siguientes: Presencia, Información urbana, Interacción, Transacción y Transformación o democracia electrónica. Se analizó la página web de la institución, utilizando una lista de cotejo para verificar la existencia o no de una serie de atributos correspondientes a cada uno de los niveles de gobierno electrónico. Adicionalmente, se usó la observación directa y la matriz FODA para determinar las fuerzas, oportunidades, amenazas, debilidades presentes en la Alcaldía del estado Barinas para la implementación del Gobierno Electrónico. Se constató suficiente infraestructura tecnológica, personal con conocimientos de informática, y disponibilidad de suficientes equipos de computación con accesibilidad a Internet. Al efectuar el análisis, se concluye que el Gobierno electrónico en la alcaldía del estado Barinas se encuentra en la tercera fase, denominada interacción, y no se ofrece nada a nivel de transacción y transformación.
Sonar Sensor Models and Their Application to Mobile Robot Localization
Antoni Burguera,Yolanda González,Gabriel Oliver
Sensors , 2009, DOI: 10.3390/s91210217
Abstract: This paper presents a novel approach to mobile robot localization using sonar sensors. This approach is based on the use of particle filters. Each particle is augmented with local environment information which is updated during the mission execution. An experimental characterization of the sonar sensors used is provided in the paper. A probabilistic measurement model that takes into account the sonar uncertainties is defined according to the experimental characterization. The experimental results quantitatively evaluate the presented approach and provide a comparison with other localization strategies based on both the sonar and the laser. Some qualitative results are also provided for visual inspection.
The UspIC: Performing Scan Matching Localization Using an Imaging Sonar
Antoni Burguera,Yolanda González,Gabriel Oliver
Sensors , 2012, DOI: 10.3390/s120607855
Abstract: This paper presents a novel approach to localize an underwater mobile robot based on scan matching using a Mechanically Scanned Imaging Sonar (MSIS). When used to perform scan matching, this sensor presents some problems such as significant uncertainty in the measurements or large scan times, which lead to a motion induced distortion. This paper presents the uspIC, which deals with these problems by adopting a probabilistic scan matching strategy and by defining a method to strongly alleviate the motion induced distortion. Experimental results evaluating our approach and comparing it to previously existing methods are provided.
Configuraciones de las prácticas lectoras en contextos sociales: La lectura situada en la escuela y el trabajo
González de la Torre, Yolanda;
Perfiles educativos , 2011,
Abstract: this article offers a partial report of the results of a research whose purpose is to show how particular reading practices are made up in subjects who read in different contexts, in this case in the university classroom and at workplace. the data of the first context come from undergraduate students of laws and geography at public universities, whereas the data about reading at workplace proceed from employees of public institutions who perform professional practices in the referred disciplines. two were the instruments to gather the information: observation and thematic interview. the results suggest that context has a significant influence on the reading practice, in this case the institution where the subjects study or work establish action habits and, consequently, reading habits, and also a relative homogeneity of the kind of texts that use to be read.
Calidad de las semillas de accesiones de leguminosas colectadas en la región oriental de Cuba (Nota técnica)
González,Yolanda; Reino,J; Toral,Odalys;
Pastos y Forrajes , 2011,
Abstract: a collection mission was conducted during 2006 in the eastern region of cuba, which comprised zones of the provinces granma, guantánamo, holguín, bayamo, las tunas and camagüey. seeds from 95 legume accessions, 68 herbaceous ones and 27 trees, were collected. afterwards, a germination test was conducted, to know their quality (with seed coat cut). for that purpose, petri dishes were used on river sand. the number of seeds used was variable in each accession (according to the collected amount) and only one replication was used (without statistical design). the germination counts were made according to international rules. the best quality seeds corresponded to the tree species, although low germination was shown by cajanus cajan, cassia siamea, peltophorum ferrugianum and leucaena leucocephala, from the floro-pérez zone in the holguín province. they all showed 100% survival. seed quality depended on the time the seeds stayed in the field after the pod maturation stage. through this collection mission the germplasm of the eepf ?indio hatuey? increased with 64 new accessions. to continue collecting germplasm in other zones of the country is recommended, with emphasis on trees, which would allow achieving higher diversity from their use in livestock production systems, as well as to conduct the corresponding quality tests.
Dormancia y tratamientos pregerminativos en las semillas de Leucaena spp. cosechadas en suelo ácido
González,Yolanda; Reino,J; Machado,R;
Pastos y Forrajes , 2009,
Abstract: a trial was conducted with seeds of leucaena spp accessions harvested on acid soil and stored under ambient conditions, in order to determine the period and intensity of dormancy and its breaking. for that purpose a simple classification design and four replications were used, with the following treatments: 1) untreated seed (control); 2) coat cut; and 3) water at 80oc for 2 minutes. in each one of the accessions there were significant differences among the applied treatments and the highest germination values were found with the seed coat cut. all the accessions showed dormant state (between 10 and 98%), which was observed in the germination of the control and the viability with the seed coat cut. the highest dormancy values in the seeds harvested in 2006 were detected in l. macrophylla ciat 17233, l. macrophylla ciat 17231, l. diversifolia ciat 17270 and l. leucocephala ih-1140, which hardness was 98,0; 97,0; 80,0 and 74,7%, respectively; in the seeds harvested in 2003 and 2004, the hardness percentages were 89,0; 69,0 and 60,0% for l. lanceolata ciat 17252, l. macrophylla ciat 17238 and l. leucocephala cv. k-67, respectively. the seeds of the accessions were concluded to show postharvest dormancy, which varied between 10 and 98%. in addition, thermal scarification caused dormancy breaking, for which the application of this procedure before planting to leucaena spp seeds harvested on acid soil in cascajal, is recommended.
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