20,079 research outputs found
Attitudes regarding Emergency Medical Services use in patients with Acute Coronary Syndrome: the EPIHeart cohort
A monopole solution from noncommutative multi-instantons
We extend the relation between instanton and monopole solutions of the
selfduality equations in SU(2) gauge theory to noncommutative space-times.
Using this approach and starting from a noncommutative multi-instanton solution
we construct a U(2) monopole configuration which lives in 3 dimensional
ordinary space. This configuration resembles the Wu-Yang monopole and satisfies
the selfduality (Bogomol'nyi) equations for a U(2) Yang-Mills-Higgs system.Comment: 19 pages; title and abstract changed, brane interpretation corrected.
Version to appear in JHE
Difficulties to identify and pronounce the sounds /s/ and /z/ as EFL students in the second semester 2013, belonging to the Saturday program of the English Major at UNAN MANAGUA
One major concern about the EFL Saturday courses at UNAN-Managua is if the students are acquiring a good level of proficiency on pronunciation. It is a strong belief that EFL learners have great difficulties on pronunciation due to negative transfer; especially with difficult twin sounds which do not have an equivalent in the mother tongue of non-native speakers.
This research was applied to a group of 15 students of the Saturday program of the English Major at UNAN. To this purpose were applied one survey to the students, two interviews, and several class observations.
There were interesting findings about the subject and the most important is the concern to create phonological awareness in the students to improve their pronunciation
Technical, financial and environmental evaluation of 4G long term evolution: advanced with femtocell base stations
Recent advances in mobile communication technology have allowed for considerable
growth both in traffic and user numbers. However, in order to maintain acceptable quality of
experience and service levels with increasing network capacity requirements, a mobile
communications operator is challenged with high investment costs and high operating costs.
Cost effectiveness and environmental sustainability are two major factors a mobile
telecommunications operator must take into account in order to maintain its network planning
techniques ready for the accelerated growth of traffic in future mobile networks. With the
incoming LTE-Advanced system and with the increasing popularity of femtocells, it becomes
necessary to evaluate and quantify the economic viability and sustainability of this new type
of base station when used as a standalone deployment option, as well as when used in a two-tier network.
Therefore, different cases were used with a deployment method based on capacity
used with a varying non-uniform traffic distribution in order to assess the future resistance
and flexibility of this proposed solution. A comparison was made between macro cell
coverage only, full femtocell coverage and a two-tier joint solution.
Our study has concluded that for low capacity demands, the best approach is a two-tier network with femtocells used for indoor backhaul. A joint solution also allows for the
cost-effective resolution of indoor coverage issues. According to our future capacity
requirements projected, it has been concluded that a full femtocell deployment, by far, the
most economically viable option.
A method for the quantification and suppression of carbon emissions due to energy
consumption is also proposed, through which we studied and estimated the price for the
achievement of a zero carbon emissions network.Os recentes avanços na tecnologia de comunicações móveis têm permitido um
crescimento considerável da indústria, tanto em termos de tráfego como em número de
clientes. No entanto, para conseguir manter uma qualidade de experiência aceitável e com
elevada qualidade de serviço, um operador de comunicações móveis depara-se com elevados
custos de investimento e operação.
A eficácia em termos de custos e a pegada ambiental são dois factores que, entre
outros, um operador de telecomunicações móveis deve ter em conta de modo a manter as suas
técnicas de planeamento de rede preparadas para o acelerado crescimento do tráfego nas redes
móveis do futuro. Com a chegada próxima do LTE-Advanced e com a crescente popularidade
de femtocells, torna-se necessário avaliar e quantificar a viabilidade económica e o potencial
de poupança de energia deste novo tipo de estação de base quando utilizado como uma opção
de implantação autónoma, ou quando utilizado para suporte de uma rede de macro células.
Dessa forma, foram dimensionados diferentes casos de implementação baseados nos
requisitos de capacidade. Foi também aplicada uma distribuição de tráfego não-uniforme, a
fim de avaliar a resistência ao futuro e a flexibilidade de aplicação desta solução proposta.
Fez-se uma comparação entre uma implementação apenas com recurso a macro células, uma
implementação feita completamente com recurso a femtocells e uma solução conjunta destes
dois tipos de estação-base.
O estudo concluiu que, para requisitos de baixa capacidade, a melhor implementação
é uma rede de duas camadas, com femtocells utilizadas para o backhaul das ligações indoor.
A solução conjunta permite ainda a resolução eficaz de problemas de cobertura no interior de
edifícios. De acordo com a nossa projecção das necessidades futuras de capacidade concluiu-se que a implementação de uma rede apenas com recurso a femtocells é a melhor opção, do
ponto de vista da capacidade, financeiro e ambiental.
Também foi apresentada uma metodologia para quantificar a pegada ambiental
devida ao consumo de energia, através da qual se estudou e estimou os custos associados à
implementação de uma rede com pegada ambiental nula
High-pressure Raman study of L-alanine crystal
Pressure-dependent Raman scattering studies in the range 0.0 -- 32 kbar were
carried out in L-alanine in order to investigate its external mode phonon
spectra in relation to the phase transitions in the crystal. A careful analysis
of the spectra shows that the low-energy Raman modes exhibit variation both in
frequency and in intensity and between 26 and 28 kbar it is observed a
splitting of a external mode, indicating that the D_2 normal phase undergoes a
transition. Pressure coefficients for external modes are also given.Comment: 11 pages, Latex, 2 figure
Aplicación de las leyes rectoras de la educación Nicaragüense en las funcione administrativas del colegio Cristiano Nueva vida, en la modalidad de secundaria, en el II Semestre de 2017
Esta investigación está dirigida a indagar sobre la adecuada aplicación de las leyes rectoras de la Educación Nicaragüense en el Colegio Cristiano Nueva Vida, en la
modalidad de secundaria. El problema de investigación surge ante la necesidad de que la Directora del centro se
apropie de las leyes educativas, las cuales por la naturaleza de la institución están vinculadas al desempeño del proceso administrativo y se justifica porque aportará los elementos necesarios en cuanto a normas jurídicas que son fundamentales en el proceso administrativo que se desarrolla en un centro educativo. El estudio es de tipo descriptivo, se aplicó el método analítico-sintético, el método inductivo deductivo y método empírico a través de la observación, entrevistas, encuestas, guía de observación.
Las principales fuentes de información que nutrieron el estudio fueron la directora, docentes y estudiantes.
Las principales conclusiones a que se llegó con este estudio es que existe desconocimiento de las Leyes Rectoras de la Educación y por consiguiente falta de aplicación de ellas, lo cual afecta tanto el desempeño de las funciones administrativas y disminuye la calidad educativa de la institución. Las principales recomendaciones son el estudio y apropiación de las leyes educativas por parte de la directora, posteriormente hacer partícipes de éstas a los docentes y trabajar articuladamente en función de ellas, para lograr el objetivo primordial de la educación: la formación plena e integral del estudiante. Palabras claves del estudio: Leyes, aplicación, función administrativa
Variables predictors of the set in the defence complex in volleyball
El objetivo de la investigación fue conocer las variables predictoras de
la eficacia de colocación en el complejo de defensa (KII), en ambos géneros, en
categorías de formación. La muestra del estudio estuvo compuesta por 2.404
acciones de juego, 1.104 en género masculino y 1.300 en género femenino,
desarrolladas por los 34 equipos participantes en el Campeonato de España
Under 16. La variable dependiente fue la eficacia de colocación. Las variables
independientes se agruparon en: variables de defensa, de colocación en KII y de
bloqueo. Los resultados determinaron que, en ambos géneros, la eficacia de
defensa, la técnica de colocación y la participación en bloqueo predecían la
eficacia de la colocación; en género masculino, zona de defensa y tiempo de
colocación; ninguna variable fue predictora únicamente en género femenino.
Esta información puede ser relevante para el desarrollo del proceso de
entrenamiento en voleibolThe objective of the research was to analyse the variables predictors of the
setting efficacy in the defence complex (KII), in youth athlete, in both genders.
The study sample was comprised of 2404 game actions, 1104 in the male
gender and 1300 in the female gender. The actions were carried out by the 34
teams that participated in the Spanish Under-16 Championship. The dependant
variable was the setting efficacy. The results determined that, in both genders,
the dig efficacy, setting technique and the participation in block predicted the
setting efficacy; in male gender, the defence zone and tempo of set; no
predictor variables were exclusive to the female gender. This information may
be relevant when developing training processes in volleyballEste estudio se ha realizado gracias a la aportación de la Consejería de Economía e Infraestructuras de la Junta de Extremadura a través del Fondo Europeo de Desarrollo Regiona
Mercado de capitales en México Vs mercado de capitales en Colombia
Trabajo de Síntesis AplicadaSe pretende establecer un comparativo del mercado de capitales entre México y Colombia, donde se define que el mercado de capitales es un tipo de mercado financiero donde se comercializa, es decir, compra y venta de títulos valor, activos financieros de empresas y otras unidades económicas como lo son las acciones, obligaciones y títulos de deuda a largo plazo.Introducción
1. Problema de Investigación
2. Pregunta de Investigación
3. Objetivos
4. Desarrollo al problema de investigación
5. Mercado de Capitales en México
6. Mercado de Capitales en Colombia
7. Resultados
Conclusiones
BibliografíaEspecializaciónEspecialista en Formulación y Evaluación Social y Económica de Proyecto
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