Compactness in Banach space theory - selected problems

We list a number of problems in several topics related to compactness in nonseparable Banach spaces. Namely, about the Hilbertian ball in its weak topology, spaces of continuous functions on Eberlein compacta, WCG Banach spaces, Valdivia compacta and Radon-Nikod\'{y}m compacta

Agronomic Potential and Nutritive Value of Promising \u3ci\u3eLeucaena\u3c/i\u3e Species in the Yucatan Peninsula

Two experiments were carried out in order to evaluate the agronomic potential, the nutritive value and the tolerance to psyllid (Heteropsilla cubana) of nine Leucaena species. A randomized block design with four repetitions was used. There were significant (P\u3c 0.01) differences on dry matter production (i.e. leaf and twigs yield ). L. collinsii showed the most promising result, which could be related to its high psyllid tolerance. In a second experiment, the preference indices of Leucaena species was assessed with sixteen male pelibuey sheep in a cafeteria trial. There were significant (P\u3c 0.0001) differences among Leucaena species. L. esculenta paniculata was the species most preferred . There was no relationship between chemical composition (i.e. ADF, NDF, and polyphenols) and preference and psyllid tolerance

A proof of uniqueness of the Gurarii space

We present a short and elementary proof of isometric uniqueness of the Gurarii space.Comment: 6 pages, some improvements incorporate

The radical character of the acenes: A density matrix renormalization group study

We present a detailed investigation of the acene series using high-level wavefunction theory. Our ab-initio Density Matrix Renormalization Group algorithm has enabled us to carry out Complete Active Space calculations on the acenes from napthalene to dodecacene correlating the full pi-valence space. While we find that the ground-state is a singlet for all chain-lengths, examination of several measures of radical character, including the natural orbitals, effective number of unpaired electrons, and various correlation functions, suggests that the longer acene ground-states are polyradical in nature.Comment: 10 pages, 8 figures, supplementary material, to be published in J. Chem. Phys. 127, 200

From Construction Workers to Architects: Developing Scientific Research Capacity in Low-Income Countries

Solving global health challenges in a sustainable manner depends on explicitly addressing scientific capacity-building needs, as well as establishing long-term, meaningful partnerships with colleagues in the developing world

Fimosis Fisiológica: circuncisión ¿Si o No?

La fimosis fisiológica es un problema temporal que se presenta en todos los recién nacidos, es la “sinequia congénita balanoprepuncial. Esta anormalidad transitoria desaparece en un 90% a los 3 años de edad, esta unión balanoprepuncial es laxa, por lo que su liberación es fácil, si no se ha realizado en forma espontánea, sólo es necesario realizar balanosis o sinequiotomía, nunca circuncisión. La intervención quirúrgica con resección del prepucio sólo esta indicado cuando existe fimosis complicada o balanopostitis recurrente. En el presente trabajo exponemos la experiencia de los autores y la revisión bibliográfica sobre el tema

Fístula umbilicovesical u onfalovesical. Reporte de un caso

Se presenta el caso de un recién nacido de 13 días de vida, que expulsaba orina por un granuloma umbilical. La fistulografía corroboró la comunicación entre el ombligo y la vejiga urinaria. La exploración quirúrgica demostró una FÍSTULA UMBILICOVESICAL U ONFALOVESICAL, con no descenso de vejiga, situada inmediatamente por detrás del ombligo; la fístula tenia forma de embudo. Se realizó resección de la fístula, exéresis del granuloma y herniorrafia umbilical. El reporte histopatológico fue que la fístula tenía un revestimiento epitelial que variaba entre escamoso, transicional y cilíndrico, con inflamación aguda y crónica. No se encontró ninguna otra malformación congénita asociada.

UNIVERSIDAD Y PLANIFICACIÓN ESTRATÉGICA EN EL ECUADOR

Approach to strategic planning is an urgent requirement in the Ecuadorian educational system; special attention deserves the University for its proactive and anticipating needs and changes character. This transformation will not be provided without the necessary strategic intention that must pass to become part of the organizational culture of managers and institutions. Higher education strategic planning is a process highly inclusive, systemic, opened to criticism, where it does not discriminate any process, organized in various times or stages, which allows you to develop, among others, objectives and strategies in different time horizons, which need external and internal information responds to the demands of the environment and of the institution itself, and whose results require follow-up and constant evaluation to ensure the fulfillment of the goals. The identification, definition and improvements of processes and procedures are articulated to an inevitable developmental strategic intention that guarantees the achievement of a dynamic of continuous improvement but they must own a benchmark implicit in the Mission of the educational organization, which cannot be based in the decision and the future of one or several leaders display if not in the prospective study which is obtained by determining the relevance of different disciplines and institutions.  El abordaje de la planificación estratégica es un requerimiento impostergable en el sistema educativo ecuatoriano, especial atención merece la universidad por su carácter proactivo y anticipador de necesidades y cambios.  Esta transformación no podrá concretarse sin la necesaria intención estratégica que debe pasar a formar parte de la cultura organizacional de los directivos y las instituciones. La planificación estratégica en la educación superior es un proceso altamente inclusivo, sistémico, aperturado a la crítica, donde no se discrimina ningún proceso, organizado en varios momentos o fases que permite formular, entre otros, objetivos y estrategias en diferentes horizontes de tiempo, que necesita información externa e interna, responde a las demanda del entorno y de la propia institución, y cuyos resultados requieren de seguimiento y evaluación constante que asegure el cumplimiento de las metas trazadas. La identificación, definición y perfeccionamientos de procesos y procedimientos van articulados a una inevitable intención estratégica desarrollista que garantiza la consecución de una dinámica de mejoras continuas pero estas tienen que poseer un referente implícito en la misión de la organización educacional, la cual no puede basarse en la decisión y visualización del futuro de uno o varios líderes si no en el estudio prospectivo que se obtiene determinando la pertinencia de las distintas especialidades e instituciones

Structure and Expansion Law of HII Regions in structured Molecular Clouds

We present radiation-magnetohydrodynamic simulations aimed at studying evolutionary properties of H\,{\normalsize II} regions in turbulent, magnetised, and collapsing molecular clouds formed by converging flows in the warm neutral medium. We focus on the structure, dynamics and expansion laws of these regions. Once a massive star forms in our highly structured clouds, its ionising radiation eventually stops the accretion (through filaments) toward the massive star-forming regions. The new over-pressured H\,{\normalsize II} regions push away the dense gas, thus disrupting the more massive collapse centres. Also, because of the complex density structure in the cloud, the H\,{\normalsize II} regions expand in a hybrid manner: they virtually do not expand toward the densest regions (cores), while they expand according to the classical analytical result towards the rest of the cloud, and in an accelerated way, as a blister region, towards the diffuse medium. Thus, the ionised regions grow anisotropically, and the ionising stars generally appear off-centre of the regions. Finally, we find that the hypotheses assumed in standard H\,{\normalsize II}-region expansion models (fully embedded region, blister-type, or expansion in a density gradient) apply simultaneously in different parts of our simulated H\,{\normalsize II} regions, producing a net expansion law ($R \propto t^\alpha$, with $\alpha$ in the range of 0.93-1.47 and a mean value of $1.2 \pm 0.17$) that differs from any of those of the standard models.Comment: Accepted for publication in MNRA