OALib Journal期刊

ISSN: 2333-9721




2017 ( 6 )

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2015 ( 94 )

2014 ( 170 )


匹配条件: “Guillermo Llaque” ,找到相关结果约5999条。
María Bermúdez,María Hernández,Guillermo Llaque,Carlos Majano
Salud, Arte y Cuidado , 2011,
Abstract: We determined the frequency of intestinal parasites and risk factors in school children of the parish Cuji, Barquisimeto, Lara State, from march to september 2011, students were distributed according to the presence and type of parasitism, sex, age, socioeconomic status, use of water and salads also investigated the water contamination and the lettuce purchased by the community. We performed a cross-sectional study with 232 students, selected by simple probability sampling. Informed consent, the representatives held a survey related to the objectives and requested a stool sample for analysis by direct examination with saline, iodine, and Kato, Quensel. Were parasitized 36.6% of those tested, being more frequent in children of 12 years (16.5%) and predominantly in females (57.6%) The most frequent species was Blastocystis hominis with 68.2%. Parasites, 71.8% were monoparasitism, 72.9% belonged to Stratum IV as Graffar, and 69.4% consumed raw salads. Only 20% were contaminated lettuce. There was no difference with respect to non-parasitized according to socioeconomic status, water consumption and raw salads, perhaps due to the homogeneity of these risk factors in this community. But highlights the high prevalence of protozoa and the high frequency of monoparasitism. The findings of this research will open the way for future studies and the creation of educational and preventive programs.
Migración, guerra interna e identidad andina en Perú
Fabiola Escárzaga,Julio Abanto Llaque,Anderson Chamorro G.
Política y cultura , 2002,
Abstract: Entrevistamos al cantautor peruano Manuelcha Prado, que en su último disco, Saqra, acom-pa ado de la Banda Kavilando, fusiona la música andina con el blues y el jazz. Su propuestamusical es una más de las caras de la cultura que los migrantes andinos han recreado y creado enLima para afrontar los retos que su instalación en un espacio hostil y precario les impone. Suexperiencia personal como migrante serrano en la costa es común a la de millones de peruanos, éles uno más de los ayacuchanos que viven en el asentamiento Huanta del populoso distrito lime ode San Juan de Lurigancho. Su canto rese a poéticamente la vivencia cotidiana del choqueviolento entre las dos Limas, la criolla y la andina.
Peso al nacimiento en hembras bovinas doble propósito Birth weight in dual purpose bovine females
N Madrid-Bury,C González-Stagnaro,J Goicochea Llaque,D González-Villalobos
Revista de la Facultad de Agronomía , 2007,
Abstract: En novillas mestizas de reemplazo se programó un proyecto de investigación sobre el comportamiento reproductivo entre nacimiento y primera lactancia. El objetivo de este primer reporte fue determinar el efecto de la zona, sistema de manejo, predominio racial y época sobre el peso al nacimiento (PN). Se analizaron 7.005 datos de PN en 26 fincas doble propósito (DP) del estado Zulia (10° LN). Las fincas pertenecían a cuatro zonas agroclimáticas ubicadas en dos ecosistemas: bosque seco tropical (EL Laberinto, Costa Oriental del Lago y Perijá) con precipitación promedio de 880, 780 y 1050mm respectivamente y bosque húmedo tropical (Sur del Lago) con precipitación de 1650mm. El sistema de manejo se clasificó como Mejorado (SM) o Tradicional (ST), variando el predominio racial entre Holstein, Brahman, Pardo Suizo y Carora. La época de nacimiento se agrupó en Enero-Marzo (seca), Abril-Junio (lluviosa), Julio-Septiembre (intermedia) y Octubre-Diciembre (lluviosa). El PN promedio fue 31,1±4,7 kg, siendo 3,1% superior en SM que en ST (P<0,001), más bajo en Perijá (30,1±0,1 kg) y más elevado en la Costa Oriental (32,3±0,1 kg) (P<0,001). Las crías Carora fueron las más pesadas 32,2±0,2 kg y las Brahman las de menor peso 30,6±0,1 kg (P<0,001) con PN intermedios en Pardo Suizo (31,3±0,2 kg) y Holstein (31,3±0,2 kg; P<0,001). Las becerras nacidas en la época seca tuvieron el menor PN (30,6±0,1 kg; P<0,001). Sistema de manejo, zona, predominio racial y época afectaron PN (P<0,001), siendo evidentes las interacciones de zona x predominio racial (P<0,05), zona x época de nacimiento (P<0,01) y sistema de manejo x predominio racial (P<0,01). Un bajo PN se considera un riesgo que debe ser controlado. Manejo y alimentación son riesgos que condicionan la adaptabilidad de las novillas para cada zona y ecosistema, al igual que el PN y la supervivencia de las crías. A research project was programmed in replacement crossbred heifers about reproductive behavior between birth and first lactation. The objective was to determine the effect of zone, management system, breed predominance and season on birth weight (BW). Data of 7.005 BW from 26 dual purpose herds located in Zulia state, Venezuela (10° NL) were analyzed. Farms belonged to four agro climatic zones in two ecosystems: dry tropical forest (El Laberinto, Costa Oriental del Lago and Perija) with a bimodal rainfall average of 880, 780 and 1.050 mm, respectively and, tropical humid forest (Sur del Lago) with a rainfall of 1650 mm. Improved (IM) and Traditional (TM) management system were considered, as well as, breed predominanc
An Indoor Radon Survey in Three Different Climate Regions in Mexico, and the Influence of Climate in the Obtained Values  [PDF]
Guillermo Espinosa, Richard Gammage
Journal of Environmental Protection (JEP) , 2011, DOI: 10.4236/jep.2011.29133
Abstract: In this paper we present the results of a survey of indoor radon concentration levels in Mexico. In order to investigate whether differences in climate translate into significant differences in indoor radon concentrations, the country was divided into three climate regions: the northern semi-desert region, the central semitropical region and the southern tropical region. The survey was carried out using nuclear track methodology. The dosimeters employed for the survey were based on the passive closed-end cup device, developed at the Physics Institute of the National Autonomous University of Mexico, and used PADC as detector material. A well-established protocol for chemically etching and reading the detectors was followed. Average annual temperatures differ between regions (from 15℃ to 28℃) but vary relatively little within each region. Atmospheric temperature is one of the most important factors which need to be considered when carrying out a survey of indoor radon concentrations because temperature largely determines building ventilation habits, and ventilation habits are known to have significant effects on indoor radon concentrations. Other factors, including building construction materials, architectural styles, geological and hydrological characteristics, and seismicity, vary from region to region and within each region. In each of the three regions low levels of indoor radon (from 37 to 179 Bq·m-3) were found.
The Flypaper and Teflon Effects: Evidence from China  [PDF]
Lyoe Lee, Guillermo Vuletin
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.37103
Abstract: In this paper, we analyze how public spending responds to income and intergovernmental fiscal transfer shocks in China. Similar to federations around the world, we find the flypaper effect at the provincial level since the country became a de facto federation in 1980. Before 1980 we find what we define as the teflon effect at the central government level. We rationalize the latter regularity using collection costs/distortionary taxation arguments
Some relationships between the geometry of the tangent bundle and the geometry of the Riemannian base manifold
Guillermo Henry,Guillermo Keilhauer
Mathematics , 2009,
Abstract: We compute the curvature tensor of the tangent bundle of a Riemannian manifold endowed with a natural metric and we get some relationships between the geometry of the base manifold and the geometry of the tangent bundle.
Fracture Response of Reinforced Concrete Deep Beams Finite Element Investigation of Strength and Beam Size  [PDF]
Guillermo A. Riveros, Vellore Gopalaratnam
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.411212
Abstract: This article presents a finite element analysis of reinforced concrete deep beams using nonlinear fracture mechanics. The article describes the development of a numerical model that includes several nonlinear processes such as compression and tension softening of concrete, bond slip between concrete and reinforcement, and the yielding of the longitudinal steel reinforcement. The development also incorporates the Delaunay refinement algorithm to create a triangular topology that is then transformed into a quadrilateral mesh by the quad-morphing algorithm. These two techniques allow automatic remeshing using the discrete crack approach. Nonlinear fracture mechanics is incorporated using the fictitious crack model and the principal tensile strength for crack initiation and propagation. The model has been successful in reproducing the load deflections, cracking patterns and size effects observed in experiments of normal and high-strength concrete deep beams with and without stirrup reinforcement.
Mobile learning for HIV/AIDS healthcare worker training in resource-limited settings
Maria Zolfo, David Iglesias, Carlos Kiyan, Juan Echevarria, Luis Fucay, Ellar Llacsahuanga, Inge de Waard, Victor Suàrez, Walter Llaque, Lutgarde Lynen
AIDS Research and Therapy , 2010, DOI: 10.1186/1742-6405-7-35
Abstract: Twenty physicians used individual Smartphones (Nokia N95 and iPhone), each equipped with a portable solar charger. Doctors worked in urban and peri-urban HIV/AIDS clinics in Peru, where almost 70% of the nation's HIV patients in need are on treatment. A set of 3D learning scenarios simulating interactive clinical cases was developed and adapted to the Smartphones for a continuing medical education program lasting 3 months. A mobile educational platform supporting learning events tracked participant learning progress. A discussion forum accessible via mobile connected participants to a group of HIV specialists available for back-up of the medical information. Learning outcomes were verified through mobile quizzes using multiple choice questions at the end of each module.In December 2009, a mid-term evaluation was conducted, targeting both technical feasibility and user satisfaction. It also highlighted user perception of the program and the technical challenges encountered using mobile devices for lifelong learning.With a response rate of 90% (18/20 questionnaires returned), the overall satisfaction of using mobile tools was generally greater for the iPhone. Access to Skype and Facebook, screen/keyboard size, and image quality were cited as more troublesome for the Nokia N95 compared to the iPhone.Training, supervision and clinical mentoring of health workers are the cornerstone of the scaling up process of HIV/AIDS care in resource-limited settings (RLSs). Educational modules on mobile phones can give flexibility to HCWs for accessing learning content anywhere. However lack of softwares interoperability and the high investment cost for the Smartphones' purchase could represent a limitation to the wide spread use of such kind mLearning programs in RLSs."Mobile learning" or "mLearning" is learning that occurs across locations, benefiting of the opportunities that portable technologies offer. The term is most commonly used in reference to using PDAs, MP3 players, noteb
Crecimiento Pre-Destete en Hembras Bovinas Doble Propósito
González-Stagnaro,Carlos; Rodríguez-Urbina,María A.; Goicochea-Llaque,Javier; Madrid-Bury,Ninoska; González-Villalobos,Decio;
Revista Científica , 2006,
Abstract: pre-weaning growth of bovine female replacements incorporated to the medicine production and reproductive control program was evaluated. a total of 2,511 data from 18 dual purpose farms, located on the basin of the maracaibo lake, at zulia state, venezuela, was analyzed. the effect of zone (el laberinto, perija, costa oriental del lago, sur del lago), breed predominance (holstein, brown swiss, brahman, carora), management system: improved (sm) and traditional (st) and birth season (january-march, april-june, july-september, october-december) on age (ed), weight (pd) and daily weight gain (gdp) at weaning, as well as, its interactions were studied. for statistical analysis, proc glm of sas software was used. in sm, the ed and pd were 9.7 ± 0.1 m and, 162.2 ± 1.1 kg, with gdp 11.8% (54.9 g/d) higher than in st (p < 0.001). perija zone had lower ed (9.3 ± 0.2 m) and higher pd (179.0 ± 0.9 kg) (p < 0.001). both breed predominance x zone (p < 0.001) and breed predominance x management system interactions (p < 0.001) affected pd, been higher in brown swiss in perija and el laberinto (184.3 ± 2.2 kg. and 168.9 ± 2.9 kg). also, season of birth x zone interaction, affected ed, pd and gdp (p < 0.001). the environment-genotype relationship had an influence on growth that showed to be significant and of great variability. therefore, it is relevant to consider management and control of growth to optimize reproductive and productive performance of bovine females.
Primer servicio en novillas de doble propósito
González-Stagnaro,Carlos; Madrid-Bury,Ninoska; Goicochea-Llaque,Javier; González-Villalobos,Decio; Rodríguez-Urbina,María A;
Revista Científica , 2007,
Abstract: the age at first breeding (eps) in heifers is an important parameter of reproductive efficiency; however information in dual purpose cattle (dp) is limited. the eps and its principal risk factors were analyzed using 19.533 dates from 47 crossbred herds located in the four principal livestock zones of the zulia state, venezuela (9.0-11.5° nl; 28-32°c). the risks variables evaluated were: management systems: improved (sm) and traditional (st); geographic zone: el laberinto, perijá, costa oriental and sur del lago; breed predominance: holstein, pardo suizo, brahman and carora and seasons: dry and rainy season. weights at birth, weaning and, service and daily gain weight (gdp) were considered as critical control points. the eps data was analyzed by an analysis of variance-covariance anova using the procedure glm and the differences between means by lsmeans of the sas? software. eps averaged 31.5±6.1m and was early in herds under sm than st (28.1±0.1m vs 32.7±0.1m; p<0.001), higher in costa oriental than el laberinto (36.7±0.1 vs 27.6±0.2m; p<0.001), and lowest in brahman crossbred (30.6±0.1m) than in any other breed (p<0.001). eps was higher in heifers born (32.1±0.1m) and weaned (30.6±0.4m) during the dry season (january-march) and breed during the rainy season (october-december) (32.4±0.2m; p<0.001), demonstrating the effect of the season in the quality of pastures. birth weight in 68% of the female calf was < 32 kg, but it do not affect eps. when weaning age was < 6 or > 10m, eps was different (26.2±1.1 vs 31.4±0.3m; p<0.001). heifers with gdp <150g/d showed higher eps, however, when gdp >350g/d from birth-weaning and weaning-service, eps was lower (24.9±0.4 and 23.9±0.9m, respectively). gdp were considered the principal control point of the eps and, the risks that affected gdp will extend eps. high eps will delay first calving, start of lactation, genetic improvement and reproductive efficiency

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