Bacterial contamination of table eggs and the influence of housing systems

With the introduction of alternative housing systems for laying hens in the EU, recent research has focussed on the bacterial contamination of table eggs, e.g. eggshell and egg content contamination. Contamination of eggshells with aerobic bacteria is generally higher for nest eggs from non-cage systems compared to nest eggs from furnished cages or eggs from conventional cages. Studies indicate limited or no systematic differences in eggshell contamination with aerobic bacteria between eggs laid in the nest boxes of furnished cages and eggs laid in conventional cages. The major differences found in experimental studies between cage- and non-cage systems are less pronounced under commercial conditions. The effect of housing system on eggshell contamination with specific groups of bacteria is variable. Limited information is available on the influence of housing system on egg content contamination. Recent research does not indicate large differences in egg content contamination between eggs from cage- and non-cage systems (ignoring outside nest and floor eggs). The microflora of the eggshell is dominated by Gram-positive bacteria, whereas Gram-negative bacteria are best equipped to overcome the antimicrobial defences of the egg content. Much of the research on eggshell and egg content contamination focuses on Salmonella, since infection with Salmonella enteritidis, resulting from the consumption of contaminated eggs or egg products, is still a major health problem. Observed Salmonella prevalence on the eggshell and in the egg content vary, depending on the fact whether investigations were based on randomly sampled table eggs or on eggs from naturally infected hens. The limited information available on other pathogens shows that they are exclusively isolated from the eggshell and not from the internal contents

Slow growth and revolutionary change. The Norwegian IT industry enters the global age, 1970-2005

The article concludes that although the Norwegian IT industry has been lacking in export success the last 30 years, it has been important for the development of the Norwegian economy. Several IT companies have been on the verge of international breakthroughs, but have been stopped by rising costs and guided by national opportunities. The rise of the important oil-sector has been both a hindrance and an opportunity for the Norwegian IT industry. Specialised products for national markets rather than general mass-market products have become the norm for the Norwegian IT industry. This development had to a remarkable degree been associated with continuity in terms of organisations and people. The firms these people and organisations have been attached too, however, have experienced turbulence, bankruptcy and change, making the whole development from 1970 until today a seemingly messy and problematic affair. But this has really been a period of IT industry growth, and in the end the national development is reasonably successful.

On the advancement of science and technology among nations: the importance of government policies upon the development of advanced technology industries in five countries

The aims of this study were to compare the importance of government policies upon the development of advanced technology industries in five countries: France, West Germany, the United Kingdom, the United States of America and Japan. Three advanced technology industries were selected: microelectronics, machine tools and advanced materials. Data were collected from governments in the five countries, academia, independent research organizations, trade associations, industry and international organizations. The data were analyzed using statistical procedures and the results were related to classical and the "new" theories of comparative advantage determinants for the five countries. Critical analysis was also undertaken of the theories that postulate the role of government policies for industrial growth in the light of the rapid geographic diffusion of advanced technology sectors across national boundaries. As a result of these analyses the role of government policies upon the development of advanced technology industries was identified in the five countries. Analyses were undertaken to determine government policies that were successful and those that were not and the reasons for the success or failure of these policies in the light of economic, social, political and geographic factors

Silicon Glenn; a technological Brigadoon? an analysis of the electronics and IT industries in Scotland

Series: IIR-Discussion Paper

Defining the hundred year flood: a Bayesian approach for using historic data to reduce uncertainty in flood frequency estimates

This paper describes a Bayesian statistical model for estimating flood frequency by combining uncertain annual maximum (AMAX) data from a river gauge with estimates of flood peak discharge from various historic sources that predate the period of instrument records. Such historic flood records promise to expand the time series data needed for reducing the uncertainty in return period estimates for extreme events, but the heterogeneity and uncertainty of historic records make them difficult to use alongside Flood Estimation Handbook and other standard methods for generating flood frequency curves from gauge data. Using the flow of the River Eden in Carlisle, Cumbria, UK as a case study, this paper develops a Bayesian model for combining historic flood estimates since 1800 with gauge data since 1967 to estimate the probability of low frequency flood events for the area taking account of uncertainty in the discharge estimates. Results show a reduction in 95% confidence intervals of roughly 50% for annual exceedance probabilities of less than 0.0133 (return periods over 75 years) compared to standard flood frequency estimation methods using solely systematic data. Sensitivity analysis shows the model is sensitive to 2 model parameters both of which are concerned with the historic (pre-systematic) period of the time series. This highlights the importance of adequate consideration of historic channel and floodplain changes or possible bias in estimates of historic flood discharges. The next steps required to roll out this Bayesian approach for operational flood frequency estimation at other sites is also discussed

The Role of R&D in Industrial Policy: Rise and fall of a research driven strategy for industrialisation

R&D has played a central role in Norwegian public industrial policy for only a relatively short period. Before 1963, there was little interest in linking technological research policy to a wider national industrial strategy. During the mid 1960s, attempts were made to link public research more closely to industrial development, and the state became more engaged in funding industrial R&D. During the 1980s, governments increased public industrial R&D funding substantially, and for a short period of time research became a core element in national industrial policy. However, from the early 1990s the situation again changed. Public research policy lost its significance in wider national industrial strategies.

Geomagnetism : review 2009

The Geomagnetism team measures, records, models and interprets variations in the Earth’s natural magnetic fields, across the world and over time. Our data and expertise help to develop scientific understanding of the evolution of the solid Earth and its atmospheric, ocean and space environments. We also provide geomagnetic products and services to industry and academics and we use our knowledge to inform and educate the public, government and the private sector

The parallax view: the military origins of holography

The title of this piece is meant to evoke at least three sources. The first – and perhaps the only obvious one – concerns the ability of holograms to display parallax, a shifting of visual viewpoint that allows a three-dimensional image to reveal background objects behind those in the foreground. This parallax view is a unique feature of holograms as visual media. A second allusion is to the American film The Parallax View (1974, director A. J. Pakula), a rather paranoid thriller focusing on conspiracy theories concerning government and corporations. To a casual observer, the bare details of the military origins of holography suggest just such cynical and centrally-directed development, although I hope to dispel such simplistic ideas here. And a third passing reference is to the book The Parallax View (2006) by Slavoj Zizek, a wide-ranging and deep exploration of duality in political views, ontological interpretations and scientific methods, among other topics. Zizek’s theme, as well as Pakula’s, is relevant to my approach, which focuses on a parallax of both practice and intent. During the first successful decade of holography, conflicting viewpoints developed between distinct communities: the militarily-guided engineers who invented practical holography, and the later imaging scientists and artisans who stressed three-dimensionality and other attributes instead of the original goal of optical image processing. I argue that distinct groups of users had different perceptions of what holography is and what it is for