The resolution of triangular systems is a computational nucleus widely used in various scientific applications. This research performs the implementation and comparison of several parallel algorithms against an efficient sequential algorithm for solving triangular systems. The algorithms are distinguished by the way of partitioning the matrix and the allocation to the processors. The analysis of the behavior of the algorithms is performed in the solution of systems of linear superior triangular equations in a cluster of computers. For this, the arithmetic time, communication time, speed-up, and maximum efficiency metrics are taken into account. Experiments were performed for each algorithm with different matrix sizes on various processors. The algorithm with the best results was the one that blocks the rows of the matrix and applies a cyclical distribution in the cluster.

Máximos de viento en niveles bajos de la atmósfera ocurren frecuentemente sobre el mar peruano frente a la costa, denominados chorros o jets costeros. Estos jets costeros tienen un papel importante en la dinámica oceánica e impactos significativos en el clima y la ecología regional, así como en una serie de actividades humanas, por lo que las investigaciones sobre ellos son de mucha importancia. Este estudio presenta las características (frecuencia de ocurrencia, altura, intensidad y dirección) de los jets costeros frente a la costa peruana, usando datos de simulación atmosférica a alta resolución (7 km) con el modelo regional WRF, para el periodo 1994-2003, siguiendo un conjunto de criterios basado en el análisis de perfiles verticales del viento y de temperatura. Los resultados del análisis muestran que los jets costeros sobre el mar peruano pueden ocurrir durante todos lo...

Most of the problems concerning the fluids flow in conduits and tubes they imply the prediction of the conditions in a section of a system, when the conditions of some other section are known. In any section of this system, generally we are worried about the pressure of the fluid, the speed of the flow and the elevation of the section. In a line of pipe in series the loss of total energy is the sum of the great and small individual losses. This affirmation is in agreement with the principle of which the equation of the energy is a way to both take into account all the energy in the system between points. The nature parallel systems requires that the technique used for their analysis is different from which is used in series in the analysis of the systems. In general, a parallel system can have any number of branches. It stops most of the problems of this type, the objective is to determi...