Boundary integral equation formulations for free-surface flow problems in two and three dimensions

To compute the transient solution of free-surface flow problems in two and three dimensions boundary integral equation formulations are considered. Consistent lower and higher order approximations based on small curvature expansions are compared and applied to a time-dependent, linear free-surface wave problem

Relationship between adolescents' health beliefs and health behavior

This study aims to determine the relationship between Health Behavior and Health Locus of Control among 1270 adolescents (Boys N = 635 and Girls = 635) who were drawn from Bangalore rural and urban district government high schools (mean age 13.76 years). Methodology: The Global School based Health survey (WHO, 2004) and Multidimensional Health Locus of Control by Wallston and Wallston, questionnaires were used to assess health locus of control and health behavior respectively. The data obtained was subjected to statistical analysis using Pearson’s product moment correlation methods to examine the relationship between these variables. Results and Interpretation: Findings revealed that total health behavior score of adolescents is significantly correlated with ‘internal’ and ‘powerful others’ dimensions of health locus of control. Further, the ‘chance factor’ of health locus of control did not show any significant relationship with the total health behavior score. From this it can be inferred that adolescents with high inclinations towards ‘internal health locus of control’ and ‘powerful others’ have healthier dimensions of positive behaviors. Findings have also revealed that health behavior is not significantly correlated with the beliefs that ‘health is a function of chance/luck’

Conjugate gradient algorithms and the Galerkin boundary element method

Original article can be found at: http://www.sciencedirect.com/science/journal/08981221 Copyright Elsevier Ltd. DOI: 10.1016/j.camwa.2004.02.002Peer reviewe

The Use of Expressive Arts as Intervention for Children

Several scientific research have consistently proven that art has physical, cognitive, psychological, and social benefits for children and these benefits increased when art was applied in a therapeutic way (Cochran, 1996; Malchiodi, 1998; 2005; Schirrmacher, 2006; Nadkarni & Leonard, 2007) which has resulted in the development and popularity of expressive art therapies by helping professions. The present study aims at analyzing the knowledge, utilization, and definition of art and art in therapy among the professionals involved with HIV infected children. A checklist of 52-item survey of Likert –Scale and Yes – No format questions designed by Nicole L. Brogdon, 2011 was used. The findings revealed that helping professional?s are generally knowledgeable about the benefits of arts for children. The findings also illustrate a significant lacking in education about art therapy and also lack of exposure to the practical applications of art therapy within their educational experienc

Simulación de la demanda energética de climatización para una vivienda unifamiliar

El presente proyecto tiene como objetivo simular el consumo de energía útil de climatización de una vivienda unifamiliar española. Para ello se realiza una simulación anual, hora a hora, de las cargas térmicas tanto para el periodo de calefacción como para el de refrigeración; los resultados se representarán gráficamente. Se evidenciará numéricamente el exceso de gasto energético al alejarnos de las condiciones óptimas de confort. Asimismo, se aprovecharán los resultados para comparar el gasto energético de dos sistemas de climatización para ambos periodos, esto es, dos calderas para el periodo de calefacción y dos máquinas de compresión mecánica para el periodo de refrigeración. Para la realización del proyecto se ha utilizado el software matemático Mathcad, dónde partiendo de una hoja de trabajo en blanco, se han introducido las características de la vivienda y las ecuaciones físicas que rigen los procesos de transmisión de calor entre el interior y el exterior de la misma. Para definir las condiciones de diseño de climatización así como para obtener parámetros y valores válidos para limitar la demanda energética se ha acudido a los documentos RITE y CTE (Reglamento de Instalaciones Térmicas de los Edificios y Código Técnico de la Edificación respectivamente). La vivienda objeto de estudio está situada en Cáceres, Extremadura.Ingeniería Industria

Smart Coatings with Carbon Nanoparticles

Smart coatings based on polymer matrix doped with carbon nanoparticles, such as carbon nanotubes or graphene, are being widely studied. The addition of carbon nanofillers into organic coatings usually enhances their performance, increasing their barrier properties, corrosion resistance, hardness, and wear strength. Moreover, the developed composites provide a new generation of protective organic coatings, being able to intelligently respond to damage or external stimuli. Carbon nanoparticles induce new functionalities to polymer coatings, most of them related to the higher electrical conductivity of nanocomposite due to the formation of percolation network. These coatings can be used as strain sensors and gauges, based on the variation of their electrical resistance (structural health monitoring, SHM). In addition, they act as self-heaters by the application of electrical voltage associated to resistive heating by Joule effect. This opens new potential applications, particularly deicing and defogging coatings. Superhydrophobic and self-cleaning coatings are inspired from lotus effect, designing micro- and nanoscaled hierarchical surfaces. Coatings with self-healable polymer matrix are able to repair surface damages. Other relevant smart capabilities of these new coatings are flame retardant, lubricating, stimuli-chromism, and antibacterial activity, among others

Phase appearance or disappearance in two-phase flows

This paper is devoted to the treatment of specific numerical problems which appear when phase appearance or disappearance occurs in models of two-phase flows. Such models have crucial importance in many industrial areas such as nuclear power plant safety studies. In this paper, two outstanding problems are identified: first, the loss of hyperbolicity of the system when a phase appears or disappears and second, the lack of positivity of standard shock capturing schemes such as the Roe scheme. After an asymptotic study of the model, this paper proposes accurate and robust numerical methods adapted to the simulation of phase appearance or disappearance. Polynomial solvers are developed to avoid the use of eigenvectors which are needed in usual shock capturing schemes, and a method based on an adaptive numerical diffusion is designed to treat the positivity problems. An alternate method, based on the use of the hyperbolic tangent function instead of a polynomial, is also considered. Numerical results are presented which demonstrate the efficiency of the proposed solutions