Calculation of transonic steady and oscillatory pressures on a low aspect ratio model and comparison with experiment

Pressure data measured by the British Royal Aircraft Establishment for the AGARD SMP tailplane are compared with results calculated using the transonic small perturbation code XTRAN3S. A brief description of the analysis is given and a recently developed finite difference grid is described. Results are presented for five steady and nine harmonically oscillating cases near zero angle of attack and for a range of subsonic and transonic Mach numbers

An SMP Soft Classification Algorithm for Remote Sensing

This work introduces a symmetric multiprocessing (SMP) version of the continuous iterative guided spectral class rejection (CIGSCR) algorithm, a semiautomated classification algorithm for remote sensing (multispectral) images. The algorithm uses soft data clusters to produce a soft classification containing inherently more information than a comparable hard classification at an increased computational cost. Previous work suggests that similar algorithms achieve good parallel scalability, motivating the parallel algorithm development work here. Experimental results of applying parallel CIGSCR to an image with approximately 10^8 pixels and six bands demonstrate superlinear speedup. A soft two class classification is generated in just over four minutes using 32 processors

Some Factors Influencing the Respiration of Rhizobium

In the first isolation of the bacteria infecting the roots of the Leguminosae, Beijerinck found that the common meat-peptone gelatin substrate is not well adapted to their growth; but that a medium, very suitable for their culture, consists of a water extract of legume leaves, 0.25 per cent asparagin; 5 per cent sucrose and 7 per cent gelatin. Later he modified this medium by making a more concentrated legume extract from pea seedlings and omitting the asparagin. At about the same time Breal found that a water extract of the roots of legumes also favors the growth of these organisms. Hiltner and Störmer suggested a medium with asparagin as the only source of nitrogen. Later a neutral water extract of pressed yeast was advocated by Fred and this is in general use at the present time. However, extracts of some nonleguminous plants have been used with apparently equally good results. Müller and Stapp obtained excellent growth of the various cultures of the root nodule bacteria on an extract of carrots; and very recently Carroll reports that an aqueous extract of asparagus promotes the growth of these organisms just as well as yeast extract

A connection between the Camassa-Holm equations and turbulent flows in channels and pipes

In this paper we discuss recent progress in using the Camassa-Holm equations to model turbulent flows. The Camassa-Holm equations, given their special geometric and physical properties, appear particularly well suited for studying turbulent flows. We identify the steady solution of the Camassa-Holm equation with the mean flow of the Reynolds equation and compare the results with empirical data for turbulent flows in channels and pipes. The data suggests that the constant $\alpha$ version of the Camassa-Holm equations, derived under the assumptions that the fluctuation statistics are isotropic and homogeneous, holds to order $\alpha$ distance from the boundaries. Near a boundary, these assumptions are no longer valid and the length scale $\alpha$ is seen to depend on the distance to the nearest wall. Thus, a turbulent flow is divided into two regions: the constant $\alpha$ region away from boundaries, and the near wall region. In the near wall region, Reynolds number scaling conditions imply that $\alpha$ decreases as Reynolds number increases. Away from boundaries, these scaling conditions imply $\alpha$ is independent of Reynolds number. Given the agreement with empirical and numerical data, our current work indicates that the Camassa-Holm equations provide a promising theoretical framework from which to understand some turbulent flows.Comment: tex file, 29 pages, 4 figures, Physics of Fluids (in press

Sound propagation in and radiation from acoustically lined flow ducts: A comparison of experiment and theory

The results of an experimental and theoretical study of many of the fundamental details of sound propagation in hard wall and soft wall annular flow ducts are reported. The theory of sound propagation along such ducts and the theory for determining the complex radiation impedance of higher order modes of an annulus are outlined, and methods for generating acoustic duct modes are developed. The results of a detailed measurement program on propagation in rigid wall annular ducts with and without airflow through the duct are presented. Techniques are described for measuring cut-on frequencies, modal phase speed, and radial and annular mode shapes. The effects of flow velocity on cut-on frequencies and phase speed are measured. Comparisons are made with theoretical predictions for all of the effects studies. The two microphone method of impedance is used to measure the effects of flow on acoustic liners. A numerical study of sound propagation in annular ducts with one or both walls acoustically lined is presented

Promoting Healthy Eating Habits in the Working Population: The FOOD Program

Objective: Promote healthy diets through offer and demand, drawing workers' attention to diet and modifying food offers through educating food suppliers. Methods: Target group today over six million workers and 430.000 restaurants. Activities in restaurants and companies: Monitoring is carried out by an annual survey. Results: 2015 over 70% of Italian workers have lunch break every day, 41% inside and 59% outside the workplace (Europe 60% and 30%). 70% consider local and seasonal products important and 21% declare to be familiar with the programme, and 25% are prepared to change their eating habits. Italian restaurant owners state that 90% of their staff has good level of knowledge and 67% are willing to serve balanced meals (85% and 56% Europe). Conclusion and implications: The programme is giving good results, but also confirms that there is still to be done, particularly in the field of education and information in workplaces

Clinical quality registries: An approach to support research capacity building in clinical academic partnerships.

Clinical academic partnerships and collaborations have been implemented in a variety of formats for several decades. It is well established that the combination of onsite research and education in the clinical practice setting contributes to improved patient outcomes. The academic-health precinct model is increasingly popular, whereby the university and hospital are co-located on the same campus to promote innovation, learning and research that is embedded in clinical setting. The premise underpinning these collaborations is frequently one of research capacity building where programs are developed in partnership with nursing academics to support clinicians to create new knowledge, implement and translate research evidence to inform the provision of evidence-based care (Fry & Dombkins, 2017). Measures of success are variously reported in the form of University-centric metrics including higher research degree enrolments and completions, volume and quality of peer-reviewed publications produced, conference presentations or research funding successes or measures of research impact (Duke, 2009). In contrast, the effect on the clinical context may not be well understood and often challenging to measure and report

Industrial constructions of publics and public knowledge: a qualitative investigation of practice in the UK chemicals industry

This is a post print version of the article. The official published version can be obtained from the link below - © 2007 by SAGE PublicationsWhile the rhetoric of public engagement is increasingly commonplace within industry, there has been little research that examines how lay knowledge is conceptualized and whether it is really used within companies. Using the chemicals sector as an example, this paper explores how companies conceive of publics and "public knowledge," and how this relates to modes of engagement/communication with them. Drawing on qualitative empirical research in four companies, we demonstrate that the public for industry are primarily conceived as "consumers" and "neighbours," having concerns that should be allayed rather than as groups with knowledge meriting engagement. We conclude by highlighting the dissonance between current advocacy of engagement and the discourses and practices prevalent within industry, and highlight the need for more realistic strategies for industry/public engagement.Funding was received from the ESRC Science in Society Programme

The ROTSE-III Robotic Telescope System

The observation of a prompt optical flash from GRB990123 convincingly demonstrated the value of autonomous robotic telescope systems. Pursuing a program of rapid follow-up observations of gamma-ray bursts, the Robotic Optical Transient Search Experiment (ROTSE) has developed a next-generation instrument, ROTSE-III, that will continue the search for fast optical transients. The entire system was designed as an economical robotic facility to be installed at remote sites throughout the world. There are seven major system components: optics, optical tube assembly, CCD camera, telescope mount, enclosure, environmental sensing & protection and data acquisition. Each is described in turn in the hope that the techniques developed here will be useful in similar contexts elsewhere.Comment: 19 pages, including 4 figures. To be published in PASP in January, 2003. PASP Number IP02-11