A lattice measurement of the B*B? coupling using DWF light quarks and the Relativistic Heavy Quark action

I describe a calculation of the B*B? coupling in lattice QCD. The B*B? coupling is directly related to gb, the leading order low-energy interaction constant of heavy meson chiral perturbation theory. Knowledge of the coupling will help decrease systematic uncertainties in lattice QCD B-physics studies, which are important to constrain the CKM matrix and probe the Standard Model. This calculation is performed with 2+1 flavours of dynamic quarks using the domain wall fermion action. To simulate the heavy b-quark I use a non-perturbatively tuned relativistic heavy quark action which keeps discretisation effects under good control. This allows me to make the first calculation of theB*B? coupling directly at the physical b-quark mass. I conduct a chiral and continuum extrapolation to the physical point and consider all sources of systematic error. The final result including both statistical and sytematic errors is gb = 0.567(52)stat(58)sys

PRESSURE FLUCTUATIONS IN TWO-PHASE FLOWS

Merged with duplicate record 10026.1/1680 on 14.03.2017 by CS (TIS)Naturally occurring pressure fluctuations have been observed in two-phase flows by a number of researchers for example Matsui [1984]. This thesis Investigates the nature of these pressure fluctuations within vertically upward bubbly two-phase flows with a view to developing a novel non-intrusive pressure correlation technique for use downhole to monitor the area average dispersed phase velocity, Vg. To date non-intrusive correlation flow monitoring techniques suitable for use downhole exhibit a non-uniform field sensitivity characteristic which when correlated between two points reflects the velocity of the dispersed phase within the stronger sensing region. Four sources of pressure fluctuations were Identified In the present study, these being temporal variations in the average gas void fraction a(t), variations in the convected pressure field surrounding a moving bubble, turbulence generated by the wake of a bubble and background turbulence in the continuous phase. Magnitudes and structure length scales of these pressure sources were evaluated differentially at two points in a continuous fluid using simple models and it was found that pressure fluctuations associated with a bubbles motion close to the measurement points dominate the pressure signal. It was also found that the magnitude of pressure fluctuations associated with a bubble's motion decreases rapidly with increasing distance from the bubble and the structure length scale caused by this effect Is of the order of the tapping separation distance. Using numerical simulation techniques and a recirculating air/water flow loop with a test section diameter of 77.8mm, (both of which were developed in this thesis) differential pressure fluctuations generated by an upwardly flowing bubbly two-phase flow w ere studied. Superficial gas and liquid velocities up to 0.35m/s and 1.5m/s respectively and-. average gas void fractions up to 25% were covered. It was concluded -t hat. pressure fluctuations caused by bubble motion near the pipe wall dominate` the, differential pressure signal. The... autocorrelogram of these signals is considered to be related to tie 'bubble velöcity within the'entrapped bubble layer near the pipe wall, which are observed to travel at an almost '.c onstant velocity independent of the continuous phase velocity. Cross correlation of two pressure signals are indicated,,, to be related to the convected bubble velocity of bubbles outside the entrapped bubble layer which is related to Vg.Schlumberger Cambridge Research Lt

Insect Conservation for the Twenty-First Century

Insects have been immensely successful as an animal group. They dominate compositional diversity of all but the saltiest and coldest parts of the planet. Yet today insects are declining at a precipitous rate. This is of great concern in terms of impoverishment of Earth, and is also dire for us. Insects contribute to the maintenance of terrestrial and freshwater systems, their service delivery and their resilience. The meteoric impact of humans is challenging this dominance, yet so few people realize that the very fabric of life on which they depend is being unraveled at an alarming rate. Action is required, as are new perspectives, if we are to maintain insect diversity and services through the twenty-first century. Here, we review how we should view and act to have more effective insect diversity conservation based on six themes: (1) philosophy (establishing the ethical foundation), (2) research (the finding out), (3) policy (the framework for action), (4) psychology (understanding how to engage humans in insect conservation action), (5) practice (implementation of action), and (6) validation (establishing how well we are doing at conserving insects). We then overview some emergent challenges and solutions at both the species and landscape operational levels in agricultural, forestry, and urban environments

PERCEPÇÕES E AÇÕES SOBRE A PÓS-GRADUAÇÃO LATO SENSU COMO FATOR REGULADOR NA QUALIDADE DO ENSINO SUPERIOR

A pós-graduação constitui um importante segmento do ensino superior, por ser uma área estratégica para o desenvolvimento técnico e científico da instituição como um todo, na medida em que permite oferecer uma perspectiva de continuidade de estudos para os egressos, articulando-se com o ensino de graduação, bem como, enseja o diálogo, particularmente, com a pesquisa e, também com a extensão, favorecendo a realização da tríplice função universitária (PDI, UNAES, 2002). Entretanto, a pós-graduação lato sensu, composta pelos cursos de especialização e aperfeiçoamento, ainda não possui instrumental para que possa ser avaliado o seu funcionamento e desempenho. Convém ressaltar que a execução e o desenvolvimento deste tipo de pós-graduação contribui de forma significativa para a melhoria da qualificação de alunos egressos do ensino superior, como também de profissionais que estão atuando no mercado de trabalho e que precisam de atualização constante para enfrentarem a concorrência. Quanto aos resultados alcançados, neste tipo específico de avaliação, pouco se tem escrito e relatado sobre o assunto e, no entanto, conforme cita Samways (1998, p. 102) apud Silveira; Colossi e Souza (1998): Há porém, um interesse crescente, uma vez que as organizações universitárias, que não dispõem ainda de todas as condições para implantarem cursos de mestrado e doutorado vêem na especialização uma alternativa eficaz para suprir necessidades em relação à pós-graduação. A UNAES – Faculdade de Campo Grande, em março de 2002 implantou cursos de pós-graduação lato sensu de caráter institucional, em diversas áreas de conhecimento e, esta iniciativa propiciou à instituição contribuir para a melhoria da qualificação de profissionais de nível superior que atuam na região sul-mato-grossense, como também de egressos dos cursos superiores que não se encontram preparados para enfrentar o mestrado ou o doutorado, tornando-se imprescindível conhecer e analisar o desenvolvimento desses cursos, objetivando a aplicação de mecanismos que possam contribuir com a elevação de sua qualidade. Este trabalho visa identificar as características e os indicadores de funcionamento e desempenho dos cursos de pós-graduação lato sensu que são oferecidos na UNAES – Faculdade de Campo Grande e, para tanto foi necessário realizar um estudo fundamentando sobre a avaliação do ensino superior brasileiro, incluindo a avaliação dos cursos de pós-graduação, complementando com a origem histórica e seu aspecto legal, para se chegar ao objetivo proposto

Book Reviews

Book Review 1Book Title: Developments in Numerical EcologyBook Authors: Edited by P. Legendre & L. LegendreSpringer-Verlag, Berlin, 1987. 585 pp., 107 figures.Book Review 2Book Title: Parasitic ProtozoaBook Authors: J.P. Kreier & J.R. BakerAllen and Unwin, Boston. 241 pages

Designing Coastal Management Strategies for Populations with Distinct Needs: The Case of Learning Disabilities

The Disability Discrimination Act (DDA 1995, amended 2005), Equality Act (2010), EU Disability Action Plan (2003–2010) and EU Disability Strategy (2010–2020) were designed to make equal opportunities a ‘reality’. As 16% of the EU population is statutorily disabled, there are considerable implications for beach management. Common research examples given of beach users include swimmers, anglers and water-sport enthusiasts – but rarely people with learning disabilities (LD). This paper assessed the viewpoints of a group of beach users with LD and considered their appreciation of three different coastal classifications in South Wales, UK. Because of the nature of their disabilities, the research applied a participatory photo-interpretation methodology (photovoice) at these three beach locations. The research then compared the LD ranking of beach issues with rankings provided by members of the general public at the same beaches. The results demonstrated some similarities between LD and general public coastal needs, but identified the need for specific considerations to be made by beach managers for LD users. These included informed self-advocacy, use and application of signage, instructive access and a requirement for baseline information gathering. The research proposes an Integrated Coastal Access Model (ICAM) from which Coastal Zone Management (CZM) and gatekeepers can consider the needs of people with LD within coastal strategies. Finally, this research also highlighted the use of photovoice in coastal research projects and the need for innovative methodological considerations when researching certain groups

"Why Is the Left Heart Stronger Than the Right ?"

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