Documentation of the Fourth Order Band Model

A general circulation model is presented which uses quadratically conservative, fourth order horizontal space differences on an unstaggered grid and second order vertical space differences with a forward-backward or a smooth leap frog time scheme to solve the primitive equations of motion. The dynamic equations for motion, finite difference equations, a discussion of the structure and flow chart of the program code, a program listing, and three relevent papers are given

WHAT IS THE LENGTH OF A SNAKE?

The way that herpetologists have traditionally measuredlive snakes is by stretching them on a ruler andrecording the total length (TL). However, due to the thinconstitution of the snake, the large number of intervertebraljoints, and slim muscular mass of most snakes,it is easier to stretch a snake than it is to stretch anyother vertebrate. The result of this is that the length ofa snake recorded is infl uenced by how much the animalis stretched. Stretching it as much as possible is perhapsa precise way to measure the length of the specimenbut it might not correspond to the actual length ofa live animal. Furthermore, it may seriously injure a livesnake. Another method involves placing the snake in aclear plexiglass box and pressing it with a soft materialsuch as rubber foam against a clear surface. Measuringthe length of the snake may be done by outlining itsbody with a string (Fitch 1987; Frye 1991). However, thismethod is restricted to small animals that can be placedin a box, and in addition, no indications of accuracy of thetechnique are given. Measuring the snakes with a fl exibletape has also been reported (Blouin-Demers 2003)but when dealing with a large animals the way the tapeis positioned can produce great variance on the fi nal outcome.In this contribution we revise alternative ways tomeasuring a snake and propose a method that offers repeatableresults. We further analyze the precision of thismethod by using a sample of measurements taken fromwild populations of green anacondas (Eunectes murinus)with a large range of sizes

Discurso de su excelencia, el embajador de la República de Los Cocos, ante la Asamblea Internacional

Discurso de su excelencia, el embajador de la República de Los Cocos, ante la Asamblea Internacional. Cantinflas en "Su Excelencia", México, 1967. Lopitos (Cantinflas) es un simple burócrata de la República de los Cocos. Sin embargo, la nación se ve envuelta en una serie de cambios en el poder donde el mismo Lopitos termina siendo nombrado como embajador. El nuevo dignatario enfrentará el conflicto entre los dos grandes bloques del poder: los "verdes" y "colorados" quienes, encabezados por Dolaronia (Obviamente EEUU) y Pepeslavia (Apuntando a José Stalin de la URSS), necesitan el voto del nuevo emisario en una asamblea internacional para dominar el mundo. El momento cúlmen de la película es cuando Lopitos tiene la posibilidad de dar un discurso oficial ante los "representantes del mundo", ya que aprovechará de hacer una crítica a los modelos económicos socialista y capitalista imperantes en los tiempos de la guerra fría, y a los comportamientos de las superpotencias Unión Soviética y Estados Unidos.Universidad Tecnológica de El Salvado

Esquizofrenia vs. acción cultural : una aproximación a la realidad contemporánea

Qué sucede en el mundo moderno con las instituciones que tienen como deber influir y guiar con una filosofía y verdades que le den sentido a la vida? De muchas formas se viene constatando que se ha perdido el sentido místico de la superación personal y hacia lo superior, que es la- base principal de todas las instituciones religiosas. -la pregunta es: "¿qué es lo que está pasando?" "¿qué ha hecho o están haciendo los líderes en estos campos tan importantes para la vida: y la superación del ser humano?" Y esto se observa en muchas religiones en el mundo entero. Al contrario de lo que se espera, las religiones se han vuelto o muy laicas o muy conservadoras, hasta llegar a extremos fundamentalistas pregonando una verdad única.Universidad Tecnológica de El Salvado

Stable dark and bright soliton Kerr combs can coexist in normal dispersion resonators

Using the Lugiato-Lefever model, we analyze the effects of third order chromatic dispersion on the existence and stability of dark and bright soliton Kerr frequency combs in the normal dispersion regime. While in the absence of third order dispersion only dark solitons exist over an extended parameter range, we find that third order dispersion allows for stable dark and bright solitons to coexist. Reversibility is broken and the shape of the switching waves connecting the top and bottom homogeneous solutions is modified. Bright solitons come into existence thanks to the generation of oscillations in the switching wave profiles. Finally, oscillatory instabilities of dark solitons are also suppressed in the presence of sufficiently strong third order dispersion

El museo universitario de Antropología de la UTEC : su importancia en una sociedad por culturizarse

¿Qué es un museo?. Un activismo cultural por parte del Estado que lleva a la necesidad de la conformación de una política cultural. Hacia la conformación del Museo Universitario de Antropología de la UTEC. Función sociocultural y científica del MUA. Explicacion del contenido de las salas. a manera de consideración final.UNIVERSIDAD TECNOLÓGICA DE EL SALVADO

Complexity challenges in ATM

After more than 4 years of activity, the ComplexWorld Network, together with the projects and PhDs covered under the SESAR long-term research umbrella, have developed sound research material contributing to progress beyond the state of the art in fields such as resilience, uncertainty, multi-agent systems, metrics and data science. The achievements made by the ComplexWorld stakeholders have also led to the identification of new challenges that need to be addressed in the future. In order to pave the way for complexity science research in Air Traffic Management (ATM) in the coming years, ComplexWorld requested external assessments on how the challenges have been covered and where there are existing gaps. For that purpose, ComplexWorld, with the support of EUROCONTROL, established an expert panel to review selected documentation developed by the network and provide their assessment on their topic of expertise