Ground-state properties of bosons in three- and two-dimensional traps

We study trapped systems of bosons at zero temperature in three and two dimensions. Conditions are fulfilled for the application of Gross-Pitaevskii theory with a positive scattering length. Series expansions for ground-state properties are obtained in both the noninteracting and the strong-coupling (Thomas-Fermi) limits. From these expansions, analytic estimates are presented in the form of two-point Pad\'e approximants. We explicitly show the approximants for the total energy per particle and the chemical potential.Comment: LaTeX, 4 pages, 3 ps figure

LA UNIVERSIDAD INTELIGENTE PARA EL SIGLO XXI

Se llama “organización inteligente” la que crea un entorno inteligente, en el que las inteligencias particulares se desarrollan con eficacia y brillantez. Lo consiguen por el modo de estar organizados, por los hábitos de colaboración que establecen, por el clima estimulante, por el atractivo de un proyecto. Las instituciones que no consiguen añadir ese plus de brillantez, creatividad y eficacia, son instituciones tontas. Vampirizan el talento y lo dilapidan en burocracias agotadoras, pugnas mezquinas por el poder o por los presupuestos, nepotismo sin ilustrtación y endogamias degenerativas” José Antonio Mena (2004) Universidades inteligentes y universidades tontas, in: Revista Mexicana de Agronegocios, no.14, México, p.26

Characterization and dynamics of boulder beaches in Galician coast

Os coídos son praias de cantos e bloques que se atopan asociados aos cantís e ás plataformas rochosas, especialmente en áreas dominadas por rochas graníticas. Trátase de moreas de clastos de tamaño heterométrico, con predominio dos de tamaño bloque, que nalgúns lugares poden chegar a superar os 2 m de longo no seu eixe maior, sendo moi abundantes os que miden entre 1 e 2 m. Os mellores exemplos de coídos atópanse na chamada Costa da Morte, situada ao norte do cabo Vilán (Camariñas, A Coruña), na área de Corrubedo (Ribeira, A Coruña) e no sector de costa que se alonga entre o cabo Silleiro e o esteiro do río Miño (Baiona, Oia, O Rosal e A Guarda en Pontevedra). Polo deseño que debuxan en planta téñense diferenciado 5 grandes tipos: lonxitudinais, en punta dobre, en arco, en corredor e en punta simple. Desde o punto de vista xenético diferéncianse catro tipos: derivados de formas de exhumación granítica, derivados da fragmentación de plataformas e cantís mariños por arranque, derivados de desprendementos e derivados de depósitos de orixe fría. En moitos casos a súa xénese é múltiple. Para poder coñecer a mobilidade dos bloques empregouse un micro dron para realizar voos de baixa altitude sobre dous coídos, en Laxe Brava (Ribeira, A Coruña) e en Oia (Pontevedra). Os voos realizáronse en xullo de 2012, maio de 2013 e abril de 2014. Os voos permitiron a obtención de ortofotografías e modelos dixitais do terreo de alta resolución (MDT) que, integrados nun Sistema de Información Xeográfica (SIX), foron usados para controlar os cambios na posición de miles de cantos e bloques. A altura máxima das ondas de tormenta foi maior no inverno de 2013-2014 que no inverno 2012-2013, e isto reflectiuse nun aumento na proporción dos bloques movidos, dun 17 % a case o 48 % en Laxe Brava e do 53 % a case o 88 % en Oia.Coídos are beaches composed of cobbles and boulders that are usually found in association with cliffs and rock platforms, particularly in granite-dominated areas. They consist of accumulations of heterometric, predominantly boulder-sized clasts, often between 1 and 2 m and even with their main axis exceeding 2 m in some areas. The best examples of coídos are found in the area known as Costa da Morte, located north of Cape Vilan (Camariñas, A Coruña); in the Corrubedo area (Ribeira, A Coruña), and along the stretch of coastline located between Cape Silleiro and the Miño river estuary (Baiona, Oia, O Rosal, and A Guarda, in Pontevedra). According to their shape from top view, five broad types have been defined: longitudinal, double-pointed, arched, corridor-like, and single-pointed. Genetically, four types can also be distinguished: those derived from granite exhumation processes; those generated by the dislodgement of rock fragments from shore platforms and sea cliffs; those produced by rockslides, and those originated by glacial deposition. Their genesis is often of multiple origin. In order to study boulder mobility, a micro-drone was flown at low heights over two coídos, one in Laxe Brava (Ribeira, A Coruña) and the other in Oia (Pontevedra). Flights were carried out in July 2012, May 2013, and April 2014. These flights yielded ortophotographs and high-resolution digital terrain models (DTM), which were integrated in a GIS and used to monitor thousands of cobbles and boulders for changes in their position. Maximum storm wave height was greater during winter 2013-2014 than during winter 2012-2013, resulting in an increase in the proportion of moved boulders from 17 % to almost 48 % in Laxe Brava and from 53 % to almost 88 % in Oia

Panorama das afecções dermatológicas em Florianópolis.

Trabalho de Conclusão de Curso - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Departamento de Clínica Médica, Curso de Medicina, Florianópolis, 198

Developing and characterization of catfish skin hydrolysates including antioxidant and antimicrobial properties

Catfish skin (CS) contains considerable amount of protein that may be hydrolyzed enzymatically to generate hydrolysates (CSH) which may have antioxidant and antimicrobial properties. The generation of natural compounds with these properties is of special interest to the food industry. The objective of this study was to develop and characterize CSH including antioxidant and antimicrobial properties. CSH were produced from different enzymatic reaction periods using alkaline protease, and their characterization, antioxidant, antimicrobial, and some functional properties were evaluated. A selected CSH was analyzed for peptide composition and partial amino acid sequences. The color analysis showed that darker, more yellow, and redder CSH were generated throughout the time of hydrolysis. CSH at 4, 5, and 6 h of hydrolysis showed considerable antioxidant activity and antimicrobial properties in-vitro, high emulsion stability, and low oil holding capacity influenced by the time of hydrolysis. Low-molecular weight peptides with positive charges were suggested as responsible for the antimicrobial activity. CSH were developed and characterized. Further research is suggested, especially on identification, isolation, and synthesis of specific peptides from CSH with both antioxidant and antimicrobial activity

Theoretical and numerical investigations of the parametric resonance of the mechanical vibrissa

In nature, vibrissae are tactile hairs of mammals used as sensor elements for the exploring the surrounding area. These hairs, also known as whiskers, can be found in different locations on an animals body. Mystacial vibrissae are distributed over a whiskerpad on a muzzle. Carpal vibrissae are located on the downside aspect of the forelimbs of mammals. The vibrissal hair has a conical shape and grows from a special heavily innervated hair follicle incorporating a capsule of blood. As the hair itself has no receptors along its length, the vibrissa may be considered as a system for transmitting forces and torques that arise from the contact between the hair and an object to sensory receptors inside the follicle. The present thesis deals with the vibrational motion of vibrissae dur- ing natural exploratory behaviour from the mechanical point of view. The phenomenon of the parametric resonance of the vibrissa is investigated the- oretically and numerically. In the first part of this thesis, two mechanical models of an elastic beam are presented based on findings in the literature. The first model considers a straight beam with the linearly decreasing radius of the circular cross-section. The second model takes into account the circu- lar natural configuration of the cylindrical beam. Within these models, the small transverse vibration of the beam under a periodic following force at the tip are analysed using the Euler-Bernoulli beam theory and asymptotic methods of mechanics. In the second part of the thesis, the numerical analysis of the problems is performed based on the finite element method using ANSYS 16.2 software. For each model, the dynamical response of the system on the parametric excitation is simulated for different frequency values. It is shown theoretically and numerically that at specific ranges of the excitation frequency the phenomenon of the parametric resonance of the beam takes place. That means that the amplitude of vibrations of the beam increases exponentially with time, when it is stimulated within one of the frequency ranges of the parametric resonance. These ranges depend on the geometrical and material parameters of the beam model, as well as the am- plitude of the periodic excitation.Tesi