oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 220 )

2018 ( 394 )

2017 ( 397 )

2016 ( 599 )

Custom range...

Search Results: 1 - 10 of 242348 matches for " Carlos Iván; "
All listed articles are free for downloading (OA Articles)
Page 1 /242348
Display every page Item
Development of a Low Cost Pulsed Laser Deposition System for Thin Films Growth  [PDF]
Marcos Iván Oliva, Carlos Iván Zandalazini, Juan Carlos Ferrero, Hector Raúl Bertorello
Modern Instrumentation (MI) , 2012, DOI: 10.4236/mi.2012.14006
Abstract: .Pulsed Laser Deposition (PLD) is a powerful technique to grow thin films. Oxides, Magnetics and superconducting materials have been obtained by PLD and theirs properties are strongly dependent of deposition parameters. The construction of a simple and cheap PLD system that is suitable for growing various thin films, including magnetic materials, controlling some deposition parameters is presented. The design characteristics and construction are presented for each one of the devices that compose this PLD system. The equipment has the possibility of carrying out films deposition using up to five targets under controlled atmosphere and substrate temperature. The system also allows controlling the cool off sample time after growing up films at high temperatures. A wide range of relative speeds between target and substrate axial rotation can be externally controlled. With the configuration and the dimensions adopted in their construction, a PLD system of great experimental flexibility is achieved, at a very low cost regarding the commercial systems. To evaluate their performance and effectiveness, the deposition characteristics of a BaFe12O19 film on (0001) sapphire substrate is presented.
Destino Italia: nuevas pautas migratorias
Carlos Iván Mendoza
Migraciones internacionales , 2006,
Abstract: Italia es una de las naciones europeas con una comunidad extranjera residente en su territorio de mayor magnitud; parte significativa de los emigrantes ha llegado en a os recientes, lo que plantea crecientes retos tanto a la sociedad civil poco habituada a la convivencia con otras comunidades como a las instituciones políticas. La investigación estudia las causas y características del fenómeno de la inmigración en Italia; describe el panorama actual de la corriente migratoria, analiza la condición que guardan las comunidades extranjeras más significativas numéricamente, revisa los nichos ocupacionales que los extranjeros captan, su papel en la economía italiana, y describe el marco legal en la materia. El autor plantea que la magnitud del flujo migratorio está convirtiendo a Italia en un país multicultural, como ha sucedido con otros países de la Unión Europea.
Discurso y violencia política en Sendero Luminoso
Degregori, Carlos Iván
Bulletin de l'Institut Francais d'études Andines , 2000,
Abstract: DISCOURS ET VIOLENCE POLITIQUE DU SENTIER LUMINEUX. Jusqu en 1977, le Sentier Lumineux faisait partie des nombreux groupes appartenant à la gauche péruvienne radicale qui insistait sur la nécessité de recourir à la lutte armée en vue de prendre le pouvoir. La présente étude souligne l importance d éléments comme le discours, l émergence d une figure cosmocratique et la communauté de discours construite autour du mouvement armé dans le processus de transformation du Sentier Lumineux - alors un simple groupe marginal de province - qui est devenu une machine de guerre grace à l accumulation d un capital symbolique . Le Sentier Lumineux a eu une influence marquante dans la vie politique du Pérou au cours des décennies 1980-1990 y compris après la capture de son principal chef (1992) et la décomposition du mouvement qui s en est suivie. Hasta 1977, Sendero Luminoso era uno de los numerosos grupos de la izquierda radical peruana que pregonaban la necesidad de la lucha armada para conquistar el poder. El presente trabajo analiza la importancia que tuvo la elaboración de un discurso, la aparición de una figura cosmocrática y la construcción de una comunidad-de-discurso alrededor suyo, para explicar la transformación de SL, hasta entonces un grupúsculo marginal provinciano que, a partir de la acumulación de capital simbólico , se convirtió en una máquina de guerra . SL incidió de manera decisiva en la vida política peruana de las décadas de 1980 y 1990, incluso después de la captura de su líder máximo (1992) y su subsiguiente colapso. SHINING PATH S DISCOURSE AND POLITICAL VIOLENCE. Until 1977, Shining Path (Sendero Luminoso) was one of the numerous Peruvian extreme left-wing groups proclaiming for the armed struggle in order to seize power. This paper analyzes the importance of elaborating a discourse, the emergence of a cosmocratic figure and the elaboration of a community discourse around the armed group to explain the transformation experienced by Shining Path as a marginal group coming from the provinces which, thanks to the accumulation of a symbolical capital , became a war machine . Shining Path had a significant influence on the Peruvian political life in the 80 s and 90 s, even after the capture of its main leader (1992) and its subsequent collapse.
Un enfoque gerencial de la teoría de las restricciones
Carlos Iván Aguilera C.
Estudios Gerenciales , 2000,
Abstract:
Descentralización y relaciones intergubernamentales en Bolivia
Iván Carlos Arandia Ledezma
Convergencia , 2002,
Abstract: La mayor parte de los países latinoamericanos han optado por la descentralización como una alternativa para mejorar los niveles de eficacia, eficiencia y legitimidad en la administración pública. Estos cambios han determinado modificaciones en la estructura del Estado, marcado cambios fundamentales en el funcionamiento del aparato gubernamental y las formas de interacción entre sus diferentes instancias. En Bolivia, el proceso de descentralización, indisolublemente asociado a la municipalización, enfrenta la necesidad de importantes ajustes, principalmente en lo relacionado con los niveles intermedios de gobierno que, como articuladores de las políticas públicas locales y nacionales, han demostrado notables debilidades.
Long run dynamics of regional growth in Chile.
Carlos Oyarzún,Iván Araya
Estudios de Economia , 2001,
Abstract: Este trabajo examina al proceso de crecimiento regional en Chile utilizando un enfoque de series de tiempo. En particular, se testea la hipótesis de una raíz unitaria en el (log) de las razones de producto per cápita entre todos los posibles pares de regiones. Se verifica que existen dos grupos de regiones que presentan convergencia entre grupos y dos que no lo hacen.
Pharmacological Control of Estrus in Tropical Cattle, an Economical Assessment of Different Synchronization Protocols  [PDF]
Juan J. Molina, Iván Molina, Alejandro Jiménez, Carlos S. Galina, Juan J. Romero
Open Journal of Veterinary Medicine (OJVM) , 2012, DOI: 10.4236/ojvm.2012.23024
Abstract: To compare the fertility results and to assess the cost-effectiveness of several synchronization protocols applied under the conditions of beef cattle enterprises in Colombia, 1658 multiparous zebu crossbred cows mostly Brahman and Nelore ranging between 2 - 6 parities were used. Five protocols of pharmacological treatments varying in hormones used, dosage and the time of application were tested. All cows were inseminated at 52 h by appointment. Pregnancy diagnosis was undertaken over 45 d after insemination by rectal palpation. The total cost per cow and the total cost per gestation, for each protocol, were calculated. Taking a herd of one-hundred cows as baseline for calculations, it was estimated the cost of the total amount of pregnancies possibly obtained in each protocol; then, the excess between the costs of a pregnant cow and the cost of a treated cow was estimated. Additionally, the costs due to cows empty after four services were calculated. A total of 874 pregnancies were registered (52.7%), with pregnancies per protocol varying between 46.9% and 66.2% (p < 005). The cost per treated cow, varied between $64.08 and $97.47 and the cost per gestation from $126.01 to $177.26, without association between the cost of the treatment and the pregnancy rate. Protocol A was the best cost-effective with the lowest additional costs, the lowest amount of open days (2107.7 to 2231.7 d) and IA straws (average = 134), with an additional costs of $6940.00. Synchronization of estrus using pharmacological products seems to have a place in the management of cattle; however, caution should be called upon a careful assessment both from the part of the farm and the professional in charge of the enterprise to avoid using the technique indiscriminatively thus propitiating the use of a method that might not be cost efficient.
Novedades para la flora del Uruguay: nuevo registro de Agarista (Ericaceae)
Grela, Iván A.;Brussa, Carlos A.;
Acta Botanica Brasilica , 2005, DOI: 10.1590/S0102-33062005000300011
Abstract: se reporta por primera vez la presencia de agarista chlorantha (cham.) g. don (ericaceae) para la flora del uruguay. esta especie arbustiva vive exclusivamente en el extremo noreste del país (departamento de rivera) en las cimas y laderas de las elevaciones conocidas como "cerros chatos" formados por areniscas de edad jurásica. en este ambiente también crecen en forma casi exclusiva agarista eucalyptoides (cham. & schltdl.) d. don, ilex dumosa reissek (aquifoliaceae), butia paraguayensis (barb.-rodr.) l.h. bailey (arecaceae) y ocotea pulchella mart. (lauraceae), además de otras especies arbóreas y arbustivas de más amplia distribución en el país, en formaciones arbóreas abiertas asociadas a pastizales.
What is Published in Human Morphology?: Types of Designs and Levels of Evidence
Suazo Galdames,Iván; Manterola D,Carlos;
International Journal of Morphology , 2010, DOI: 10.4067/S0717-95022010000200021
Abstract: evidence-based medicine (ebm) employs the best available evidence in a particular time and context to solve specific clinical problems. this method of practicing medicine has been adopted by most of the disciplines involved in medical training; however, morphology appears to remain beyond this paradigm. the first step in evidence-based practice based on morphology is to recognize the types of studies being conducted with regard to morphology, followed by the assessment of the level of evidence that they provide, which is the purpose of this study. we designed a bibliometric study, in which journals in the master journal list of thomson reuters, selected using the keywords "morphology" or "anatomy," available between 2007 and 2008, with access to full text in electronic version, whose languages were english and spanish, and which only considered studies on human morphology, were included. we analyzed a total of 790 articles, of which 93.1% were descriptive, 6.5% were analytical, and 0.4% were experimental design types. according to the stage of the study, most of the articles (94.8%) accounted for prevalence and differential diagnosis studies, concentrating on numerous designs such cross-section, which gave complex evidence (1c). the use of these methodologies for the systematic morphological knowledge allowed us to widen our research to generate clinically useful recommendations or merely a teaching approach based on the systematic morphological knowledge available.
MODELACIóN DE LA DISTRIBUCIóN DE VIAJES EN EL VALLE DE ABURRá UTILIZANDO EL MODELO GRAVITATORIO
GONZáLEZ,CARLOS; SARMIENTO,IVáN;
DYNA , 2009,
Abstract: this paper is based on recent studies of transportation which took place in the metropolitan area of the aburra valley: survey origin/destination 2005 and study of bus routes, the road network modeling of the aburra valley, and mobility master plan. the analysis and development of trip distribution model in the metropolitan area of aburra valley is done by using the software transcad for the database of 2005, using the gravitational model which determines the trips between two zones in accordance with the generation and attraction of trips between related zones and a impedance function that depends on the distance between zones, travel time or travel cost between zones. the model was analyzed for different periods and purposes and it was found that the negative exponential is the impedance function which adapts best to the studied model.
Page 1 /242348
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.