Manipulation of a Bose-Einstein condensate by a time-averaged orbiting potential using phase jumps of the rotating field

We report on the manipulation of the center-of-mass motion (`sloshing') of a Bose Einstein condensate in a time-averaged orbiting potential (TOP) trap. We start with a condensate at rest in the center of a static trapping potential. When suddenly replacing the static trap with a TOP trap centered about the same position, the condensate starts to slosh with an amplitude much larger than the TOP micromotion. We show, both theoretically and experimentally, that the direction of sloshing is related to the initial phase of the rotating magnetic field of the TOP. We show further that the sloshing can be quenched by applying a carefully timed and sized jump in the phase of the rotating field.Comment: 11 pages, 9 figure

Structural aspects of bis(quadridentate)zirconium(IV) complexes

The synthesis of bis(quadridentate)-zirconium (IV) complexes was completed of which two new complexes, bis(N,N\u27-disalicylidene-cis-1,2,diamino-cyclohexane( zirconium (IV) and bis(N,N\u27disalicylidene-trans-1,2-diaminocyclohexane)zirconium(IV), were deemed suitable for physical and chemical comparisons to bis(N,N\u27-disalicylidene-1,2-phenylenediamino)-zirconium(IV). Using H-NMR spectroscopy at low temperatures, it was determined that the interconversion of the cyclohexane moiety of bis(N,N\u27disalicylidene-cis-1,2-diaminocyclohexane) zirconium(IV) begins to slow whereas, the motions associated with the backbones of the other two complexes do not. Furthermore, using H-NMR spectroscopy, it was determined that heating solutions of pairs of the complexes for four days at 155 C causes the complex to exchange ligands to form mixed-ligand complexes

Educação em saúde: papel e funções do especialista e do generalista

Education for health is a process in which all public health and medical care personnel are involved. People learn both formally (planned learning experiences) and informally (unplanned learning experiences). Since the patient, the client, the consummer and the community expect public health and medical care personnel to assist them with health and disease issues and problems, the response of the professional "educates" the customer whether the professional intends to educate or not. Therefore, it is incumbent on all public health and medical care professionals to understand their educational functions and their role in health education. It is also important that the role of the specialist in education be clear. The specialist, as to all other specialists, has an in-depth knowledge of his area of expertise, i.e., the teaching/learning process; s/he may function as a consultant to others to enhance the educational potential of their role or s/he may work with a team or with communities or groups of patients. Specific competencies and knowledge are required of the health education specialist; and there is a body of learning and social change theory which provides a frame of reference for planning, implementing and evaluating educational programs. Working with others to enhance their potential to learn and to make informed decisions about health/disease issues is the hallmark of the health education specialist.A Educação em Saúde é um processo no qual todo o pessoal da saúde pública e do atendimento médico estão envolvidos. As pessoas aprendem ou formalmente (experiências de aprendizagem planejadas) ou informalmente (experiências de aprendizagem não planejadas). Na medida em que o paciente, o cliente, o usuário e a comunidade esperam que o pessoal da saúde pública e o pessoal do atendimento médico os auxiliem, no que diz respeito a assuntos e a problemas da saúde, a resposta do profissional "educa" o usuário, quer o profissional tenha ou não tenha a intenção de o fazer. Portanto, cabe a todos os profissionais da saúde pública e do atendimento médico entender suas funções educativas e seu papel na Educação em Saúde. É também importante que o papel do especialista em educação esteja claro. O especialista, tanto quanto os outros especialistas, possui um profundo conhecimento na sua área técnica como, por exemplo, o processo de ensino-aprendizagem; pode trabalhar como um consultor para ampliar o potencial educativo de outros ou pode trabalhar com equipes, com comunidades ou com grupos de pacientes. É preciso que o especialista em Educação em Saúde tenha conhecimentos e competências específicos e há um conjunto de teorias de aprendizagem e de mudança social que proporcionam um esquema de referência para planejar, implementar e avaliar programas educativos. Trabalhar com pessoas para ampliar seu potencial quanto à aprendizagem e a tomar decisões informadas a respeito de assuntos relacionados à saúde/doença é o objetivo do especialista em Educação em Saúde

An experimental documentation of trailing-edge flows at high Reynolds number

Experiments documenting attached trailing-edge and near-wake flows at high Reynolds numbers are described. A long, airfoil-like model was tested at subsonic and low transonic Mach numbers, and both symmetrical and asymmetrical flows with pressure gradients upstream of the trailing edge were investigated. Model surface pressures and detailed mean and turbulence flow qualities were measured in the vicinity of the trailing edge and in the near-wake. The data obtained are of sufficient quality and detail to be useful as test cases in assessing turbulence models and calculation methods

Modelling Stress Wave Propagation and Triaxial Compression Test using Smoothed Particle Hydrodynamics

Smoothed Particle Hydrodynamics (SPH) is used to model stress wave propagation and compression tests in elastic solids under triaxial loading conditions. It builds on our previous studies of deformation of elastic solids under uniaxial and biaxial loading. A laboratory scale triaxial compression test is used to demonstrate the generation, propagation and reflection of the elastic waves in the specimen. To verify the SPH based approach, the results are compared to matching results using the Finite Element Method (FEM). The solutions predicted by SPH are found to agree well. This paper illustrates the potential of SPH for accurate modelling of solid materials that are subjected to triaxial compression, and of the resulting elastic wave propagation

Modelling Plastic Deformation and Thermal Response in Welding using Smoothed Particle Hydrodynamics

An approach for modelling plastic deformation and thermal response in a weld pool using the mesh-free Smoothed Particle Hydrodynamics (SPH) method is developed. The proposed modelling technique is illustrated by simulating a simple setup of an arc welding process. The plastic deformation and temperature distribution in the weld pool and the surrounding parent material are analysed using SPH. This work establishes the capability of SPH in gaining insight into the material deposition and its subsequent evolution, and predicting plastic deformation and heat transfer in welding processes. This can then be used to evaluate the generation of thermal stresses and the change in mechanical and metallurgical properties in the weld pool and the adjacent Heat Affected Zone (HAZ)

Towards a virtual comminution machine

Towards the end of the 1990s readily available personal computers became sufficiently powerful - when combined with an efficient numerical code - to use discrete element modelling (DEM) in two dimensions for models involving a few hundred to a few thousand particles in commercially available packages. Some proprietary codes reported up to 200,000 particles [Herbst, J.A., Nordell, L., 2001. Optimization of the design of sag mill internals using high fidelity simulation. In: Vancouver, B.C., Barratt, D.J., Allan, M.J., Mular, A.L. (Eds.), Proceedings of the SAG Conference, University of British Columbia, IV, 150-164; Cleary, P.W., 2001a. Charge behaviour and power consumption in ball mills: Sensitivity to mill operating conditions, liner geometry and charge composition. Int. J. Min. Process. 63, 79-114 and Cleary, P.W., 2001b. Recent advances in DEM modelling of tumbling mills. Minerals Eng. 14, 1295-1319]. In early 2000, JKMRC and CSIRO-MIS agreed to an informal collaboration with the objective of testing various DEM approaches against detailed process measurements. The initial collaboration demonstrated that 3D-DEM using spheres was sufficiently realistic for flow patterns and power estimation within tumbling mills. The results were reported in papers which were presented at SAG 2001 and in the technical literature [Morrison, R.D., Cleary, P.W., Valery, W., 2001. Comparing power and performance trends from DEM and JK modelling. SAG 2001, Department of Mining and Minerals Process Engineering. University of British Columbia, Vancouver, 284-300; Cleary, P.W., Morrison, R., Morrell, S., 2003. Comparison of DEM and experiment for a scale model SAG mill. Int. J. Min. Process. 68, 129-165]. The commencement of the CRC for Sustainable Resource Processing in 2003 provided an opportunity to formalize the collaboration and bring increased resources to bear. The objective of this collaboration is to develop a virtual comminution machine (VCM). The VCM will allow a comminution machine design which exists as a suitably detailed design in a 3D Computer aided design file (CAD) to simulate processing an ore (which has been characterised by suitable test work) to predict progeny, power consumption, wear and even machine component loadings. This paper reports on the substantial progress made to date towards a practical Virtual Comminution Machine

Analyzing the Role of a Protein Downregulated After Induction of Filamentous Growth In Candida albicans

Candida albicans is a commensal fungus, normally living with its human host, however, it has the ability to cause invasive infection. Candida albicans is the fourth most frequent nosocomial infection affecting a vulnerable immunocompromised population. Candida albicans exhibits different morphologies including yeast, pseudohyphae, and hyphae. The varying morphological potential of this organism is a virulence trait. Because of this, research has focused on what drives activation of hyphal formation as well as what impedes it. During a filamentation assay, a novel observation pertaining to a subgroup of proteins being downregulated early after germination, was made. In this study, we constructed an over-expression strain of one of these proteins and have used known hypha inducing media to determine if it will have an impact on filamentation. With the conditions tested thus far, no significant impacts on morphology have been observed